CN100411598C - Dazzle prevention device having electromagnetic wave detection function - Google Patents
Dazzle prevention device having electromagnetic wave detection function Download PDFInfo
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- CN100411598C CN100411598C CNB2005800015504A CN200580001550A CN100411598C CN 100411598 C CN100411598 C CN 100411598C CN B2005800015504 A CNB2005800015504 A CN B2005800015504A CN 200580001550 A CN200580001550 A CN 200580001550A CN 100411598 C CN100411598 C CN 100411598C
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- 238000001514 detection method Methods 0.000 title claims abstract description 131
- 230000002265 prevention Effects 0.000 title abstract description 7
- 238000003466 welding Methods 0.000 claims abstract description 42
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 230000003287 optical effect Effects 0.000 claims abstract description 11
- 230000035945 sensitivity Effects 0.000 claims description 41
- 208000027418 Wounds and injury Diseases 0.000 claims description 3
- 230000006378 damage Effects 0.000 claims description 3
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- 239000003990 capacitor Substances 0.000 description 9
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- 101100269850 Caenorhabditis elegans mask-1 gene Proteins 0.000 description 3
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- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting in contact-lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/04—Eye-masks ; Devices to be worn on the face, not intended for looking through; Eye-pads for sunbathing
- A61F9/06—Masks, shields or hoods for welders
- A61F9/061—Masks, shields or hoods for welders with movable shutters, e.g. filter discs; Actuating means therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/58—Photometry, e.g. photographic exposure meter using luminescence generated by light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/12—Fluid-filled or evacuated lenses
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Abstract
A dazzle prevention device having an electromagnetic wave detection function is disclosed. The device includes an optical detection means, an electromagnetic wave sensor means, the electromagnetic wave detection means, a control means, and a light transmission control means. The optical detection means detects light generated from the welding or cutting torch. The electromagnetic wave sensor means detects an electromagnetic wave. The electromagnetic wave detection means compares a signal, which is input through the electromagnetic wave sensor means and resonated, with a variably set reference value. The control means applies the electromagnetic wave detection mean drive signal to the electromagnetic wave detection means and monitors the variation of an electromagnetic signal using the output of the electromagnetic wave detection means. The light transmission control means controls the variation of light transmittance of the dazzle prevention plate in response to an output signal from the control means.
Description
Technical field
A kind of antiglare equipment of relate generally to of the present invention with electromagnetic wave detection function; more specifically; relate to antiglare equipment with a kind of electromagnetic wave detection function; this device is surveyed the electromagnetic wave of following high illumination light to produce when welding or cutting, and protection operator's eyes are avoided the injury of high light.
Background technology
In general, in order to control the transmitance of the light that welding torch or cutting torch (welding or cutting torch) produce, used a kind of operator to be worn over the antiglare equipment that photo detecting unit was gone up and be equipped with to head.
Fig. 1 is the axonometric chart that shows the protecting mask 1 that has been equipped with traditional antiglare equipment 2.
As shown in Figure 1, described forward protecting mask 1 with antiglare equipment at protecting mask 1 just is included in the illuminance that LCDs (LCD) in the antiglare equipment 2 reduces the eyes that shine the operator by an antiglare shield 5.
More specifically; photo detecting unit 4; such as being installed in described dazzle prevention means 2 forward photodiodes; survey the light that welding torch or cutting torch produce; and the control circuit that is included in the described antiglare equipment 2 carries out control so that 5 deepenings of described antiglare shield reduce the illuminance by the light of this antiglare shield, thus protection operator's eyes.
Fig. 2 is the view at explicit user interface, and this interface allows user to adjust the shading detectivity and the delay of described traditional antiglare equipment 2.
With reference to figure 2, the user interface of described traditional antiglare equipment 2 comprises shading adjustment unit 6, light detection sensitivity adjustment unit 7 and delay adjustment unit 8.
Described shading adjustment unit 6 is used to adjust the shade number of described antiglare shield 5.This shade number is represented the degree of darkness of described antiglare shield 5.When using described shading adjustment unit 6 to adjust shade number, adjusted the transmitance of described antiglare shield 5.
Described light detection sensitivity adjustment unit 7 is used to adjust the light detection sensitivity of described antiglare equipment 2.Described light detection sensitivity is a numerical value, is used to represent the degree of the output signal of control circuit response light sensor unit 4.When described light detection sensitivity increases, control circuit can be under low-light (level) response signal better.
Described delay adjustment unit 8 is used to adjust the delay of described antiglare equipment 2.Postponing under the low situation of numerical value, when described optical sensor unit 4 detected welding job and finishes, the control circuit of described antiglare equipment 2 switched to bright state with described antiglare shield 5 from dark state.On the contrary, postponing under the high situation of numerical value, switching to bright state from dark state needs longer a period of time.
In general, in the relevant field of described antiglare equipment, 5～13 scopes, 0～10 scope, and 0～10 scope as delay numerical value as light detection sensitivity number as shade number.
The user interface of described traditional antiglare equipment 2 also comprises the on and off switch 9 that is used for optionally opening and closing power supply, and the battery that is used to power 10 and being used to is indicated the low-voltage indicator 11 of the low-voltage state of this device.
Yet under the situation of only using described photo detecting unit, owing to the difference that is detected between the signal, the operation of mistake takes place continually, and their generation may be depended on the type and the coherent light of welding or bonding machine.
Just, under the situation of only using described photo detecting unit, described light detection sensitivity increases when low current welding, outdoor welding and plate sheet welding, in this case, faulty operation takes place when described antiglare shield 5 does not brighten or brighten too slowly, although described antiglare shield 5 must brighten for the coherent light around the response.
In order to prevent above-mentioned faulty operation, the antiglare equipment of electromagnetic wave detection means that discloses a kind of optional equipment.
In the outwork under being exposed to sunlight, illumination at welding light is not significantly higher than in the low current welding of ambient light illumination, perhaps causing high ambient light illumination to be difficult to discern in the environment of welding light because of light owing to use high directivity and high illumination, light when optical detection except welding light is detected, thereby by using the electromagnetic wave detection method, the traditional antiglare equipment that is equipped with described electromagnetic wave detection means can be controlled the light transmission rate of described antiglare shield effectively.
Yet, the described deficiency that has been equipped with traditional antiglare equipment of electromagnetic wave detection means is, it is configured to use described electromagnetic wave detection method under the situation of not considering environmental condition, therefore in producing a lot of electromagnetic environment, electromagnetic wave that produces based on environment rather than operator's welding torch or the cutting torch light transmission rate of described antiglare shield have at work reduced unnecessaryly, can upset operator's accurate operation like this.
Further, in being equipped with traditional antiglare equipment of electromagnetic wave detection means, described electromagnetic wave detection sensitivity is fixed, therefore by the electromagnetic wave of the generation of the source except described operator's machine, such as the electromagnetic wave that machine produced by other operators, also can be detected, so just cause wrong operation.
Further, the deficiency that has been equipped with traditional antiglare equipment of described electromagnetic wave detection means is, although described operator must discern welding or cutting zone exactly before starting working, but generate electromagnetic waves before when giving the energising of welding or cutting machine or opening welding or cut starting switch, producing light, because described photo detecting unit and described electromagnetic wave detection means are built into operation independently, therefore even without producing light, based on the electromagnetic wave that is detected, described light transmission rate also can be lowered, and so just hinders operator's execution work after having discerned welding accurately or cutting zone.
Summary of the invention
Technical problem
Therefore, made the present invention according to the problems referred to above that occur in the prior art, and an object of the present invention is to provide a kind of antiglare equipment with electromagnetic wave detection function, it allows only to use photo detecting unit or to use photo detecting unit and electromagnetic wave detection means according to environmental condition, therefore only use described photo detecting unit just can carry out effective control and also the situation of the operation that electromagnetic wave detection may make the mistake under prevent to use described electromagnetic wave detection means.
Another object of the present invention provides a kind of electromagnetic wave detection and dazzle prevention means, it does not utilize and is only surveyed the electromagnetic wave that produces by ambient light illumination or the too many electromagnetic sensor of bonding machine current affects from welding or cutting machine, and this electromagnetic wave detection and dazzle prevention means are equipped with the electromagnetic wave detection sensitivity adjustment unit to prevent to detect the electromagnetic wave that environment is produced.
A further object of the present invention provides a kind of electromagnetic wave detection and dazzle prevention means, it can be provided with priority, the light that detects to a certain degree at welding torch or cutting torch from the operator allows to survey electromagnetic wave later on, the light transmission rate that can prevent antiglare shield before beginning to survey light like this reduces, and can allow the operator carrying out welding or cutting work after identification welding or the cutting zone exactly.
Technical scheme
In order to finish above-mentioned target, the invention provides eyes that a kind of electromagnetic wave detection and antiglare equipment be used to protect the operator and avoid the injury of the light that welding torch or cutting torch produce, this device comprises with lower unit: photo detecting unit is used to survey the light that welding torch or cutting torch produce; The electromagnetic sensor unit is used to survey the electromagnetic wave that welding torch or cutting torch produce; Electromagnetic wave detection means is used for when applying electromagnetic wave detection means drive signal and will compares by the input of described electromagnetic sensor unit and the signal of resonance and the electromagnetic wave detection sensitivity of variable setting; Control unit, be used under the situation of mode selecting unit preference pattern 2, begin to survey the light time at described photo detecting unit, described electromagnetic wave detection means drive signal is applied to described electromagnetic wave detection means, and monitors the variation of described electromagnetic signal with the output of described electromagnetic wave detection means; And the optical transmission control unit, be used for by the signal of exporting from described control unit is made the variation that the light transmission rate of antiglare shield is controlled in response.
Described device also comprises user interface, this user interface comprises the mode selecting unit that can allow the operator to select a pattern in the middle of the pattern 1 of only using photo detecting unit and the pattern 2 of using described photo detecting unit and electromagnetic wave detection means simultaneously, and the display unit that can show selected pattern.
Described control unit only just can apply electromagnetic wave detection means drive signal when pattern 2 is selected by mode selecting unit.
Described electromagnetic wave detection means comprises: resonant element is used to allow the electromagnetic wave resonance by the input of electromagnetic sensor unit; Filter unit is used for removing the noise of resonant element output; Comparing unit is used for the electromagnetic wave detection sensitivity of the output and the described variable setting of more described filter unit when applying described electromagnetic wave detection means drive signal; And the time constant unit, be used to make the output smoothing of described comparing unit.
Described comparing unit comprises comparator, described therein electromagnetic wave detection means drive signal is input among its power terminal, the output of described filter unit is input in its inverting input, and a signal is arranged, comprised that by described electromagnetic wave detection means drive signal at least one variable-resistance potentiometer dividing potential drop forms, and is input in the in-phase input end.
Described user interface also comprises can change variable-resistance resistance value to adjust the digital adjustment means of shade number, light detection sensitivity number, delay numerical value and electromagnetic wave detection sensitivity number.
Described display unit can also show electromagnetic wave detection sensitivity number.
Beneficial effect
According to the present invention, a kind of electromagnetic wave detection and antiglare equipment can be determined the use of electromagnetic wave detection means according to environment, thereby only using described photo detecting unit not use described electromagnetic wave detection means when effectively control and described electromagnetic wave detection may make the mistake operation with regard to carrying out, and can when only using photo detecting unit can not carry out effective control, use again according to the described electromagnetic wave detection means of operator's selection, so just can operate described antiglare shield effectively according to environmental condition.
Further, according to the present invention, described electromagnetic surveying sensitivity can be adjusted when using described electromagnetic wave detection means, therefore the electromagnetic detection that produces in the environment at operator place can minimize, prevented wrong operation like this, such as the unnecessary reduction of light transmission rate in the middle of work, and make the operator can carry out operation accurately.
Further, described electromagnetic wave detection and antiglare equipment can be provided with priority, therefore after detecting light, can detect electromagnetic wave, thereby the light transmission rate of described antiglare shield can reduce at once after the work beginning, makes that like this operator can executable operations after discerning welding or cutting zone exactly.
Description of drawings
Fig. 1 is the axonometric chart that a demonstration has been equipped with the protecting mask of traditional antiglare equipment;
Fig. 2 is a view that allows the user interface of shading detectivity that user adjusts described traditional antiglare equipment 2 and delay;
Fig. 3 shows the structure chart that has the antiglare equipment of electromagnetic wave detection function according to the present invention;
Fig. 4 is the circuit diagram of described electromagnetic wave detection means that has the described antiglare equipment of electromagnetic wave detection function according to the present invention;
Fig. 5 is the chart that shows the described example user interface of the described antiglare equipment that has electromagnetic wave detection function according to the present invention;
Fig. 6 to 9 shows the pattern 1A that is shown on the display unit, 1B, the view of 1C and 2 screen; And
Figure 10 is presented at pattern 2 has the described antiglare equipment of electromagnetic wave detection function when selected according to the present invention the flow chart of operation.
The specific embodiment
With reference now to accompanying drawing, describe the present invention in conjunction with the preferred embodiments in detail, wherein identical Reference numeral is indicated same or analogous element all the time in different views.
With reference to appended each figure, formation of the present invention and operation have been described in detail.
Fig. 3 is the structure chart that shows according to electromagnetic wave detection of the present invention and antiglare equipment.Fig. 4 is the circuit diagram that shows according to the described electromagnetic wave detection means 30 of the described antiglare equipment with electromagnetic wave detection function of the present invention.
As described in Figure 3, the described antiglare equipment that has electromagnetic wave detection function according to the present invention comprises photo detecting unit 20, electromagnetic wave detection means 30, user interface 40, control unit 50 and optical transmission control unit 60.
The function of described photo detecting unit 20 is to survey the light of welding torch or cutting torch generation, and comprises wave filter and amplifier.Described photo detecting unit 20 is by relatively from the signal of photo detecting unit 4 with survey the variation of light from the output of solaode 3.
The function of described electromagnetic wave detection means 30 is to survey the electromagnetic wave that produces from welding torch or cutting torch.In described electromagnetic wave detection means 30, signal that formed by operator's the electromagnetic wave that welding torch or cutting torch produced and that be imported in the described electromagnetic wave detection means 30 is compared through resonance, filtering and with the value of setting, thereby detects the electromagnetic wave of specific band.
When applying electromagnetic wave detection means drive signal 33, described electromagnetic wave detection means 30 compares the output of filter unit 34 and the electromagnetic wave detection sensitivity of variable setting.Power supply by comprise that at least one variable-resistance resitstance voltage divider, contact switch or digital adjustment means that allows resistance value to change forms in variable range is input in the in-phase input end of comparing unit 36, thereby reference value can be set changeably.
Fig. 5 is the chart of an example that shows the described user interface 40 of the described antiglare equipment that has electromagnetic wave detection function according to the present invention.
Described user interface 40 is used for execution pattern to be selected, pattern indication, and the adjustment of shading, light detection sensitivity, delay and electromagnetic wave detection sensitivity.
With reference to figure 5, described user interface 40 comprises: mode selecting unit 42, display unit 44 and digital adjustment means 46.
Described mode selecting unit 42 allows user pattern of selection from the pattern 1 of only using described photo detecting unit 20 and the pattern 2 of using described photo detecting unit 20 and described mode of electromagnetic wave 30 simultaneously.
Described display unit 44 shows the selected pattern of user, shade number, light detection sensitivity number, delay numerical value and electromagnetic surveying sensitivity number on its LCD.In addition, described display unit 44 also shows low-voltage state with the form of shape and character.
Described digital adjustment means 46 is used to allow user to adjust shade number, light detection sensitivity number, delay numerical value and electromagnetic wave detection sensitivity number.
At length, described digital adjustment means 46 comprises: the sensitivity number adjustment pushbutton unit 462 that the shade number that can adjust shade number adjusts pushbutton unit 461, can adjust light detection sensitivity and electromagnetic wave detection sensitivity can be adjusted the delay numerical value that postpones numerical value and adjust button 463.
Described pushbutton unit 461 to 463 comprises that all numerical value increases button and numerical value reduces button.Two buttons are spaced from each other to increase the convenience of operation.
Described sensitivity number adjustment pushbutton unit 462 can also can be adjusted the electromagnetic wave sensitivity number 2 times in pattern at pattern 1 downward modulation lay the grain detectivity numerical value.
Simultaneously, only use the pattern 1 of photo detecting unit 20 can be divided into pattern 1A, pattern 1B and pattern 1C according to the mode of welding job.
Fig. 6 to 9 is the views that are shown in the screen of pattern 1A, 1B on the display unit 44,1C and 2.
With reference to figure 6, described pattern 1A is to use the pattern of bonding machine.When user uses described mode selecting unit 42 to select described pattern 1A, on described display unit 44, show WELD.Under described pattern 1A, can be arranged to 9～13 by the scope that described shade number is adjusted the shade number that pushbutton unit 461 changes, the scope of the light detection sensitivity number that can change by described sensitivity number adjustment pushbutton unit 462 is arranged to 0～10, and can be arranged to 0～10 by the scope that described delay numerical value is adjusted the delay numerical value that pushbutton unit 463 changes.
With reference to figure 7, described pattern 1B is to use the pattern of cutting machine.When user uses described mode selecting unit 42 to select described pattern 1B, on described display unit 44, show CUTTING.Under described pattern 1B, can be arranged to 5～8 by the scope that described shade number is adjusted the shade number that pushbutton unit 461 changes, the scope of the light detection sensitivity number that can change by described sensitivity number adjustment pushbutton unit 462 is arranged to 0～10, and can be arranged to 0～10 by the scope that described delay numerical value is adjusted the delay numerical value that pushbutton unit 463 changes.
With reference to figure 8, described pattern 1C is to use the pattern of grinding machine.When user uses described mode selecting unit 42 to select described pattern 1C, show GRIND below the cutting information on described display unit 44, while tutorial message (Protective eye wear) of wearing eye-protective device, just, instruct user to wear the tutorial message of protective eye lens, be input on the position on GRIND next door.Under described pattern 1C, do not consider that the shade number of described antiglare shield 5 is fixed as 4 from the signal of described photo detecting unit 20 outputs.
With reference to figure 9, when user is selected described pattern 2, below GRIND, show the X pattern and the outdoor welding of demonstration tutorial message, low current welding and electromagnetic wave detection below the X pattern.Just, instruct that user welds out of doors, switch and use the tutorial message of described pattern 2 when low current welding and output electromagnetic wave detection.
Described pattern 2 times, the scope of adjusting the shade number of pushbutton unit 461 changes by described shade number can be arranged to 9～13, the scope of the electromagnetic wave sensitivity number that changes by described sensitivity number adjustment pushbutton unit 462 can be arranged to 0～10, and the scope of adjusting the delay numerical value that pushbutton unit 463 changes by described delay numerical value can be arranged to 0～10.
Just, pattern 2 is selected described in being elected to, and described digital adjustment means 46 can not be adjusted described light detection sensitivity, and has only described electromagnetic wave sensitivity to be adjusted by described digital adjustment means 46.
No matter when press described mode selecting unit, described pattern can both change to described pattern 2 from described pattern 1A through described pattern 1B and described pattern 1C.
Described control unit 50 is microcomputer or comprise the control circuit of microcomputer preferably.When described pattern 1 (described pattern 1A in 1C) when being chosen, do not apply described electromagnetic wave detection means drive signal 33 and can control the light transmission rate of described antiglare shield by optical detection by described mode selecting unit 42.
When described pattern 2 is chosen by described mode selecting unit 42, described photo detecting unit 20 begins to survey light and the output of described photo detecting unit 20 is input to described control unit 50, and described control unit 50 is applied to described electromagnetic wave detection means drive signal 33 described electromagnetic wave detection means 30 and determines that priority are to begin to survey the electromagnetic wave of input by described electromagnetic wave detection means 31.In addition, 50 monitorings of described control unit are from the variation of the light of described photo detecting unit 20 inputs and from the electromagnetic variation of described electromagnetic wave detection means 30 inputs, and if described variation do not occur to the operation that stops described device when described variation takes place.
Described optical transmission control unit 60 turns round when the voltage that applies from described solaode 3 surpasses a certain setting value, and the output signal of described control unit 50 responded controls the light transmission rate of described antiglare shield 5.
With reference to figure 4, as described below according to a preferred embodiment of the described electromagnetic wave detection means 30 of antiglare equipment of the present invention.
As shown in Figure 4, described electromagnetic wave detection means 30 comprises resonant element 32, filter unit 34, comparing unit 36 and time constant unit 38.
Described resonant element 32 comprises the transistor Q1 of NPN type, and the coil L1 by electromagnetic sensor unit 31 is applied to the electromagnetic wave of base stage and controls its switch, wherein by resistance R 1 voltage vcc is applied to the current collection level.Simultaneously, when detecting electromagnetic wave by coil L1, the emitter voltage of the transistor Q1 of described resonant element 32 is applied to the electromagnetic wave signal of base stage and is arranged to and described electromagnetic wave signal resonance, and therefore described transistor Q1 running so just produces corresponding output by the current collection level.
Described filter unit 34 comprises capacitor C 1, C2 and the C4 of the current collection level outfan that is connected in series in described transistor Q1, in described capacitor C 2, the resistance R 2 of ground connection between the C4, be connected in series in the resistance R 3 and the R4 of described capacitor C 2 one ends and described capacitor C 4 one ends, and the capacitor C 3 of the ground connection between described resistance R 3 and R4.Remove the noise in the signal of input by described filter unit 34.
Described comparing unit 36 comprises comparator 37, wherein said electromagnetic wave detection drives signal 33 and is input to its power terminal, the output of described filter unit 34 is input to its inverting input (-), and by comprising that signal that at least one variable-resistance potentiometer 35 forms described electromagnetic wave detection means drive signal 33 dividing potential drops is input in its in-phase input end (+).
Because described electromagnetic wave detection means drive signal 33 is input to the power terminal of comparator 37, described comparator 37 is only just worked when described electromagnetic wave detection signal 33 is imported from described control unit 50.
The output of described comparator 37 feeds back to in-phase input end (+) by described resistance R 9, and described comparator 37 will be compared with the signal that is input to described inverting input (-) by resitstance voltage divider 35 set reference values.
Described resitstance voltage divider 35 comprises two resistance R 6 and R7.Be applied to described electromagnetic wave detection means drive signal 33 on the resistance R 7 by by the ratio dividing potential drop of determining according to the voltage distribution method, and, be set for the connection between described two resistance R 6 and the R7 with the described reference value that compares by the electromagnetic wave signal of described resonance potential 32 and filtering voltage 34.
At least one that form among 35 two resistance R 6 of described resitstance voltage divider and the R7 is variable resistance.The voltage that is input to described in-phase input end (+) can change by adjusting described variable resistance, like this, the reference value of described comparing unit 36 can be set changeably, so the operator can adjust described electromagnetic wave detection sensitivity.In this case, adjust variable-resistance value by described digital adjustment means 46.Except described digital adjustment means 46, also may use variable magnitude or contact switch.
Described time constant unit 38 is constructed such that described voltage vcc is by resistance R 8 and capacitor C 5 ground connection.The output of described comparing unit 36 is connected between described resistance R 8 and the capacitor C 5, so just makes output signal OUT level and smooth.
The operation and the effect of described antiglare equipment with electromagnetic wave detection function are as described below.
When the operator uses described mode selecting unit 42 to select described pattern 1, do not apply the described electromagnetic wave detection means drive signal 33 that comes from described control unit 50, therefore can only control the optical transmission of described antiglare shield 5 by optical detection.
During pattern 2 described in elected, according to the operation of the antiglare equipment with electromagnetic wave detection function of the present invention and effect as described in reference Figure 10.
Figure 10 shows when described pattern 2 is selected according to the operation of the antiglare equipment with electromagnetic wave detection function of the present invention and the flow chart of effect.
With reference to Figure 10, surveyed the variation of welding or the light that cutting machine produced at the described photo detecting unit 20 of step S1.At step S2 during when detectable signal is input to described control unit 50, at step S3 described electromagnetic wave detection means drive signal 33 is applied to described electromagnetic wave detection means 30 via control unit 50, and compares at step S10 electromagnetic wave signal that described electromagnetic wave detection means 30 will be imported from described electromagnetic sensor unit 31 to S40 and set reference value.
Just, survey by welding or electromagnetic variation that cutting machine produced and it is applied on the coil L1 of described electromagnetic wave detection means 31 at step S10.The impedance of described electromagnetic sensor unit 31 is set rightly so that be desirably in the effective electromagnetic wave that detects in the welding surroundings at 2KHz in the scope of 400KHz.
The transistor Q1 of described resonant element 32, wherein the electromagnetic wave that will change as mentioned above is applied to base stage, this transistor Q1 is repeated according to base potential and switch alternately, therefore described electromagnetic useful signal is exported from described current collection level by the resonance of described transistor Q1 at step S20, voltage vcc is applied to described colelctor electrode by described resistance R 1.
As mentioned above, when comprising the filter unit 34 of described resistance R 1, R3 and R4 and capacitor C 1, C2, C3 and C4, the useful signal of described electromagnetic wave being exported by resonance is not subjected to interference of noise, and last, the signal that only contains alternating component at step S30 is exported as useful signal.
The described signal that its noise is removed by described filter unit 34 is input to the inverting input (-) of the described comparator 37 of a part of forming described comparing unit 36.
In this case, be input to the in-phase input end (+) of described comparator 37 by the resistance R 6 of described resitstance voltage divider and the electromagnetic wave detection means drive signal 33 of R7 dividing potential drop, and become the reference value that will compare with signal from described filter unit 34 inputs.
So described comparator 37 is relatively from the signal and the reference value that is input to described in-phase input end (+) of described filter unit 34 outputs, and at comparison signal of step S40 output.Because connect the input of described comparator 37 and the resistance R 9 of outfan, described comparator 37 has hysteresis characteristic.Therefore, increased the current potential of in-phase input end (+), thereby realized that operation is not input to the influence of the noise signal of inverting input (-) by the output voltage of described resistance R 9 described comparators 37.
At step S50, the integrated circuit of being made up of resistance R 8 and capacitor C 5 by time constant unit 38 makes described output signal OUT level and smooth.
Signal after smoothed as mentioned above is input to control unit 50, and is calculated by described microcomputer or the control circuit that comprises microcomputer and to survey so that can survey electromagnetic amplitude in step S60.
Result of calculation according to described step S60; survey the electromagnetic wave that from welding or cutting machine, produces to change the light transmission rate of described antiglare shield 5 at the described control unit of step S70 50; therefore carry out described operation so that the electromagnetic wave and the light that are produced all are detected and control in described welding surroundings, protect operator's eyes like this.
Although disclose preferred embodiment of the present invention for purposes of illustration, one of ordinary skill in the art would recognize that the various corrections, increase and the replacement that do not break away from scope of the present invention disclosed in the claim and essence all are possible.
Claims (5)
1. antiglare equipment with electromagnetic wave detection function, this unit protection operator's eyes are avoided the injury of the light that produces from welding torch or cutting torch, comprising:
Photo detecting unit is used for surveying the light that produces from welding torch or cutting torch;
The electromagnetic sensor unit is used for surveying the electromagnetic wave that produces from welding torch or cutting torch;
Electromagnetic wave detection means is used for when applying electromagnetic wave detection means drive signal, will compare by the signal of described electromagnetic sensor unit input and resonance and the electromagnetic wave detection sensitivity of variable setting;
User interface, this interface comprises: mode selecting unit can allow the operator to select a kind of pattern from the pattern 1 of only using described photo detecting unit and the pattern 2 of using described photo detecting unit and described electromagnetic wave detection means simultaneously; And display unit, can show selected pattern;
Control unit, be used under the situation of mode selecting unit preference pattern 2, when described photo detecting unit begins probing light, described electromagnetic wave detection means drive signal is applied to described electromagnetic wave detection means and uses the output of described electromagnetic wave detection means to monitor the variation of electromagnetic signal; And
The optical transmission control unit is used for controlling from the output signal of described control unit by response the variation of the light transmission rate of antiglare shield.
2. device according to claim 1, wherein said electromagnetic wave detection means comprises:
Resonant element is used to allow the described electromagnetic wave resonance by the input of described electromagnetic sensor unit;
Filter unit is used for removing noise from the output signal of described resonant element;
Comparing unit is used for when applying described electromagnetic wave detection means drive signal, and the output of described filter unit and the electromagnetic wave detection sensitivity of described variable setting are compared; And
The time constant unit is used for the output of level and smooth described comparing unit.
3. device according to claim 2, wherein said comparing unit comprises comparator, described therein electromagnetic wave detection means drive signal is input to the power terminal of described comparator, the output of described filter unit is input to the inverting input of described comparator, and by comprising that signal that at least one variable-resistance potentiometer forms described electromagnetic wave detection means drive signal dividing potential drop is input to the in-phase input end of described comparator.
4. device according to claim 3, wherein said user interface also comprises digital adjustment means, and this digital adjustment means can change variable-resistance resistance value to adjust in shade number, light detection sensitivity number, delay numerical value and the electromagnetic wave detection sensitivity number at least one.
5. device according to claim 4, wherein said display unit also shows electromagnetic wave detection sensitivity number.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20040020731 | 2004-03-26 | ||
| KR1020040020731 | 2004-03-26 | ||
| KR1020040052291 | 2004-07-06 |
Publications (2)
| Publication Number | Publication Date |
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| CN1905848A CN1905848A (en) | 2007-01-31 |
| CN100411598C true CN100411598C (en) | 2008-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005800015504A Expired - Fee Related CN100411598C (en) | 2004-03-26 | 2005-01-04 | Dazzle prevention device having electromagnetic wave detection function |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100611935B1 (en) |
| CN (1) | CN100411598C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10285864B2 (en) | 2014-07-25 | 2019-05-14 | Snap-On Incorporated | Auto-darkening welding helmet |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100679896B1 (en) * | 2005-12-30 | 2007-02-07 | 오토스테크 주식회사 | Device for preventing from dazzling with detecting microwave |
| KR100943878B1 (en) * | 2008-07-11 | 2010-02-24 | 오토스테크 주식회사 | Digital anti-glare device and control method |
| KR20100041287A (en) * | 2008-10-14 | 2010-04-22 | 오토스테크 주식회사 | Apparatus for functional display preventing from dazzling |
| KR101244167B1 (en) * | 2011-03-18 | 2013-03-25 | 주식회사 오토스윙 | Apparatus for preventing from dazzling having self test mode |
| KR20120117121A (en) * | 2011-04-14 | 2012-10-24 | 주식회사 오토스윙 | Apparatus for preventing from dazzling having multi function |
| KR101657141B1 (en) * | 2014-09-04 | 2016-09-19 | (주)써보레 | Glare protecting apparatus and method for controlling the same |
| KR102281679B1 (en) * | 2019-06-03 | 2021-07-26 | (주)써보레 | Method for controlling of glare protecting apparatus |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN1905848A (en) | 2007-01-31 |
| KR100611935B1 (en) | 2006-08-11 |
| KR20050095515A (en) | 2005-09-29 |
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