CN2036278U - Portable instrument checker - Google Patents
Portable instrument checker Download PDFInfo
- Publication number
- CN2036278U CN2036278U CN 88204396 CN88204396U CN2036278U CN 2036278 U CN2036278 U CN 2036278U CN 88204396 CN88204396 CN 88204396 CN 88204396 U CN88204396 U CN 88204396U CN 2036278 U CN2036278 U CN 2036278U
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- Prior art keywords
- voltage
- resistance
- amplifier
- current
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- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 9
- 238000012795 verification Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004304 visual acuity Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000002463 transducing effect Effects 0.000 description 1
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Abstract
The utility model relates to a multifunctional instrument which is used for checking DDZ-II type industrial instruments and DDZ-III type industrial instruments. The multifunctional instrument can output voltage and current standard signals and can input voltage and current measuring signals. The multifunctional instrument comprises power supply, a standard signal source, a voltage amplifier, a voltage/current changer, a voltage feedback resistor, a current feedback resistor, a meter amplifier, a 41/2 digit high resolution digital meter and a function switch part. Except that an output drive is a transistor, the rest of the parts are composed of integrated blocks. The utility model has the advantages of artful design, simple structure, small size, high stability, strong anti-interference ability, convenient operation, complete functions and 0.01-level precision.
Description
The utility model belongs to measuring instrument.
The industrial instrument system of generally using is that main body is formed with DDZ-II and III type unit-combination type instrument.These instrument all are to want periodic check.At present, the tester of producing except that minority instrucment and meter plant can be used to the verification, by to the patent documentation manual information retrieval, does not also find other products.And these check meters exist many shortcomings.For example: " the DXF-01 type checking signal generator " that Dalian Instrument Factory produces, no measurement function promptly can not be demarcated the transducing unit instrument.This table output accuracy is low, and its stability has only 0.5%, and repeatability 0.25%, the index error of pointer header are ± 5%, and shock resistance is also poor.Bring certain difficulty therefore for on-the-spot user.
The utility model is a kind of multifunction instrument that is used for verification, both exportable voltage, current standard signal, but input voltage, current measurement signal again.Instrument is used the transistor except that the driving of signal output, and remaining all is made up of integrated package, and is simple in structure, and volume is little, and is easy to operate, multiple functional.This table uses light-emitting nixie tube direct digital display, and can output verification, input measurement is dual-purpose.
The utility model is made up of nine parts, i.e. power unit (1), standard signal source (2) voltage amplifier (3), baric flow transducer (4), Voltage Feedback resistance (5), current feedback resistance (6), gauge outfit amplifier (7), 41/2 high resolving power digital display gauge outfit (8) and functional switch part (9).Its principle is seen the circuit theory diagrams shown in block scheme shown in the accompanying drawing 1 and the accompanying drawing 2.Standard signal source among Fig. 1 (2), voltage amplifier (3) baric flow transducer (4), gauge outfit amplifier (7), 41/2 bit table head (8) provide required power supply by power supply (1).The mutual switching of instrument by functional switch part (9) realizes multifunction.K wherein
2Be electric current output switch, K
3Be output/input selector switch, K
4Be the voltage/current selector switch, K
5It is the voltage range selector switch.
Below to accompanying drawing 2 explanation instrumentation principles.
Instrument is exported as voltage: by voltage stabilizing diode DW
1The reference voltage that provides passes through resistance R
3Be added in potentiometer W after the dividing potential drop
1And W
2On, through W
1Coarse adjustment and W
2Fine setting obtains the very high continuous voltage standard signal of precision.This signal is through amplifier IC
4Amplify voltage stabilizing diode DW
2Level conversion, transistor BG
1Power amplification is from K switch
4-3, KK
4-1Output is again through K switch
3-2, K
4-2Return.The Voltage Feedback resistance R
89Pass through K switch
3-3Be connected in parallel on the output terminal.By K switch
5-1Select feedback factor to change the range size.Pass through K switch
4-5The voltage signal of output is fed back to amplifier IC
4Finish voltage output.
Instrument is exported as electric current: the normal voltage signal passes through K switch after voltage amplification
4-3Be added to complementary transistor BG
2, BG
3, on the baric flow transducer (4) formed, the correspondent voltage signal is become current signal.Work as K switch
2Push on the outgoing position, power supply is through K switch
2-1, K
4-1, K
3-1Output is again by K switch
3-2, K
4-2Be added to the BG of baric flow transducer (4)
2On the collector, through BG
2Collector junction, emitter junction, BG
3Emitter junction, collector junction, K switch
3-4, the current feedback resistance R
10Return to ground.At this moment current feedback resistance R
10On feedback signal through K switch
4-5Send amplifier IC back to
4, finish electric current output.
When above-mentioned instrument was used as output, voltage feedback signal and current feedback signal were being sent amplifier IC back to
4Simultaneously, also send into amplifier IC in the gauge outfit amplifier (7)
5Amplify 10 times, show the output size by 41/2 bit table head.K switch
4-6And K
5-2Select the decimal on the corresponding range corresponding tables display screen of output signal to light, finish the function of indication output signal size.
When instrument during as input measurement, K switch
3The circuit of input signal and voltage amplifier (3) baric flow transducer (4) is disconnected.Pass through K switch
4-4Select the Voltage Feedback resistance R
8, R
9(at this moment claim divider resistance more precisely, but still be called Voltage Feedback resistance for front and back address unanimity, shunt resistance also still is called current feedback resistance) or current feedback resistance R
10With gauge outfit amplifier (7), gauge outfit (8) forms voltage or reometer.K switch is also passed through in voltage measurement
5-1Select range (intrinsic standoff ratio), through K switch
4-5Send into gauge outfit amplifier (7) and amplify, gauge outfit (8) is done the demonstration of corresponding range, finishes the measurement of input signal.
The utility model adopts integrated package and transistor hybrid circuit, and it is big both to have brought into play transistorized output power, withstand voltage height, and advantages such as low price have also utilized the reliability height of integrated package, stability good, and drift is extremely low, the characteristic of good linearity.Circuit adopts big close-loop feedback technology, overcome owing to use the shortcoming that transistor brought, accuracy of instrument is guaranteed, and the display part uses is 41/2 high resolving power digital display gauge outfit, precision height, non-metering error, whole instrument volume is little, simple in structure, be easy to carry, anti-seismic performance is good, taked certain interference protection measure also can under high-intensity magnetic field, work in the table, made instrument can adapt to the needs of field condition.
Of the present utility model being characterised in that:
1, instrument is made up of power unit (1), standard signal source (2), voltage amplifier (3), baric flow transducer (4), Voltage Feedback resistance (5), current feedback resistance (6), gauge outfit amplifier (7), the apparent gauge outfit (8) of 41/2 figure place and functional switch part (9).Conversion by to switch reaches instrument check, functions such as measurement.
When 2, voltage or electric current were exported, feedback signal all was taken from output terminal, forms big close-loop feedback circuit, has brought into play integrated package and transistor advantage separately.
3, amplifier IC
4With transistor BG
1The voltage amplifier of forming (3), but both direct voltage output signals, again can with baric flow transducer (4) combination, output current signal.
4, baric flow transducer (4) has adopted complementary transistor BG
2, BG
3The emitter connection line makes I
C2=I
C3, reduce the influence of base current to output (collector) electric current, make the linear raising of output.
5, Voltage Feedback resistance R
8, R
9With the current feedback resistance R
10, both when exporting, instrument had been used as feedback, when importing, instrument is used as dividing potential drop and shunting again.And provide shows signal for gauge outfit amplifier (7).
The implementation method of this instrument is to realize by the circuit theory diagrams shown in the accompanying drawing 2.
1, power unit: transformer B is with the step-down of 220V civil power, input diode D
1D
1-4Bridge path rectification.Through capacitor C
3, C
4After the filtering, by the three-terminal voltage-stabilizing ic chip
1-3Voltage stabilizing, output ± 5V power supply supply amplifier IC
4, IC
5, standard signal source (2), the required power supply of display gauge head (8).+ 12V power supply is supplied with BG
1Doing voltage output uses.In addition, diode D
5, D
6, capacitor C
1, C
2Form voltage doubling rectifing circuit, R is provided+voltage supplying electric current output usefulness about 50V
1Be bleeder resistance.
2, standard signal source: by current-limiting resistance R
2Offer benchmark voltage stabilizing diode DW
1Working current, DW
1Be high precision, the voltage stabilizing diode of low-temperature coefficient, the reference signal of output 1.2V is through divider resistance R
3Be added in multiturn potentiometer W
1And W
2Two ends are by to W
1Coarse adjustment and W
2Fine setting, promptly exportable continuously adjustable normal voltage signal.Capacitor C
8,
9,
10Added by anti-interference.
3, voltage amplifier: amplifier IC
4Be steady certainly zero amplifier, voltage stabilizing diode DW
2Be amplifier IC
4With transistor BC
1Level conversion set, shunt resistance R
4Can improve the stability of voltage amplifier under underload.Transistor BG
1As power amplification, make maximum load current reach 10mA.Current-limiting resistance R
5With diode D
7Be to prevent that big load and reverse voltage from damaging transistor and adding.
4, baric flow transducer: complementary transistor BG
2, BG
3Adopt the emitter connection line, pairing is used, and can reduce the influence of base current to collector current, improves the output linearity.Because Ib
2+ Ic
2=(β 2+1) Ic2/ β 2=Ie2=Ie3
=Ib
3+ Ic
3=(β 3+1) Ic3/ β 3, if β 2=β 3 can realize Ic2=Ic3, the same precision when promptly output current is not subjected to the influence of base current to make electric current output can reach voltage output.R11, R12 are BG
3Certain bias voltage is provided, has made BG
3Be in the linear work zone.
5, Voltage Feedback resistance: R
8, R
9Pass through K switch
3-3Be connected in parallel on the output terminal, be amplifier IC
4,
5Provide Voltage Feedback and the shows signal of 0～200mV to pass through K switch
5-1Change feedback factor and can change the output voltage size.When instrument is used as voltage measurement, R
8, R
9Also use as divider resistance.
66, current feedback resistance: R
10Pass through K switch
3-4Be connected on and be amplifier IC on the output terminal
4,
5Current feedback and the shows signal of 0～200mV are provided.When instrument is measured as input current, R
10Use as shunt resistance.
7, gauge outfit amplifier: amplifier IC
5Be steady certainly zero amplifier, proportion resistor R
6/ R
7=9, constitute 10 times of voltage amplifiers, the shows signal of 0～200mV is amplified to 0～2000mV, deliver to gauge outfit (8) as showing.
8, gauge outfit: adopt 0～2000.0mV numeral display of high resolution gauge outfit of TSC7135 chip assembling, volume is little, and the precision height has brought convenience to measurement.Scaling position is to pass through K switch
4-6And K
5-2Finish.
9, functional switch part: pass through K switch
3, K
4, K
5Selection, this shows exportable 0～200.00mVD
C
, 0～10000mVD
C
, 0～20.000mA D
C
, the load current of voltage output can reach 10mV, and the load of electric current output is 0～3K Ω when output 0～10mA, is 0～1.5K Ω when output 0～20mA.This table can be imported 0～200.00mVD
C
, 0～10000mVD
C
With 0～20.000mAD
C
Measuring-signal, during the voltage input, instrument input impedance reaches 1M Ω, and during the electric current input, the internal resistance of instrument is 10 Ω.Accuracy of instrument can reach 0.01 grade.
This instrument design novelty, multiple functional, easy to operate, the precision height not only can be used for the industrial instrument verification. Also can be used as other instrument, the analog signal generator of equipment uses. Therefore, has certain economic benefit and use value.
Claims (5)
1, the portable apparatus tester is made up of power unit [1], standard signal source [2], voltage amplifier [3], baric flow transducer [4], Voltage Feedback resistance [5], current feedback resistance [6], gauge outfit amplifier [7], 41/2 high-resolution digital display gauge head [8] and functional switch part [9], it is characterized in that standard signal exported by potentiometer W1 tap, potentiometer W1 and W2 series connection are again with divider resistance R
8Series connection, whole branch road is in parallel with voltage stabilizing diode DW1.
2, by the described portable apparatus tester of claim 1, it is characterized in that resistance R
8And R
9Series connection, whole branch road passes through K
3-1K
3-3And K
4-4In parallel with output terminal, resistance R
10Pass through K
3-1And K
4-4Connect with output terminal.
3, by claim 1,2 described portable apparatus testers, it is characterized in that resistance R
8, R
9Pass through K
5-1And K
4-5With IC
4, IC
5Input end link to each other resistance R
10Pass through K
4-5With IC
4, IC
5Input end link to each other.
4,, it is characterized in that IC in the voltage amplifier (3) by the described portable apparatus tester of claim 1
4Output terminal connect with voltage stabilizing diode DW2, with transistor BG
1Base stage link to each other.
5, by the described portable apparatus tester of claim 1, it is characterized in that in the baric flow transducer (4) transistor BG
2And BG
3Emitter connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88204396 CN2036278U (en) | 1988-04-26 | 1988-04-26 | Portable instrument checker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88204396 CN2036278U (en) | 1988-04-26 | 1988-04-26 | Portable instrument checker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2036278U true CN2036278U (en) | 1989-04-19 |
Family
ID=4839010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88204396 Withdrawn CN2036278U (en) | 1988-04-26 | 1988-04-26 | Portable instrument checker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2036278U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018129925A1 (en) * | 2017-01-10 | 2018-07-19 | 北京康斯特仪表科技股份有限公司 | Instrument calibration device and calibration method using same |
-
1988
- 1988-04-26 CN CN 88204396 patent/CN2036278U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018129925A1 (en) * | 2017-01-10 | 2018-07-19 | 北京康斯特仪表科技股份有限公司 | Instrument calibration device and calibration method using same |
| US11262229B2 (en) | 2017-01-10 | 2022-03-01 | Beijing Const Instruments Technology Inc. | Instrument calibration device and calibration method using same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |