RU2142676C1 - Device for tv monitoring - Google Patents

Abstract

FIELD: TV equipment. SUBSTANCE: device has optical unit, first and second TV signal detectors, pointing unit, which has decoder of instructions, electric drives for horizontal and vertical movements, control unit, video monitoring unit, selector of synchronization pulses, mark signal generator, and commutation unit. Said optical unit has serial optical circuit of first lens, semi-transparent mirror, reflecting mirror and second lens. EFFECT: possibility to zoom selected image region, decreased loaded required for pointing unit. 7 dwg, 1 tbl

Description

 The invention relates to television technology and can mainly be used in remote monitoring systems, where the operator needs to further more carefully consider the details of interest of the original image presented to him.

 A known device for television surveillance / 1, p. 109 /, comprising a sequentially located and optically coupled optical unit made in the form of a zoom lens, and a television signal sensor, as well as a guidance unit, consisting of a command decoder, a horizontal electric drive and a vertical electric drive, the first output of the command decoder connected to the horizontal input of the drive movement, the output of which is the first output of the unit, the second output of the command decoder is connected to the input of the vertical movement electric drive, the output of which is the second output of the block, and the input of the command decoder is the input of the block, while the first output of the guidance block is mechanically connected with the displacement movement in the horizontal plane of the aggregate of the optical block and the television signal sensor, the movement displacement of which in the vertical plane is mechanically connected with the second output of the guidance block as well as a control unit and a video control unit, while the output of the television signal sensor is connected through the guidance unit and the control unit to the input of the video con processed roll unit and a second output connected to the control unit entry pointing unit.

The disadvantages of the prototype are:
- a large payload required from the guidance unit when performing the zoom operation of the selected image fragment, because the guidance unit performs spatial movement of a combination of two blocks: a zoom lens and a television signal sensor;
- the length of time the scaling operation is performed, which consists of the time T _{n of} pointing the fragment of interest to the operator and the time T _{f of} changing (adjusting) the focal length of the zoom lens, and to return to the original image presented, these procedures are performed in the reverse order for the same time.

 The objective of the invention is the scaling of the selected image fragment while reducing the payload required from the guidance unit, with an increase in the speed of the implementation of both the scaling operation and the return to the initially presented image.

 The problem is solved in that in a television surveillance device containing an optical unit, a first television signal sensor, a guidance unit consisting of a command decoder, a horizontal displacement electric drive and a vertical displacement electric drive, the first output of the command decoder being connected to the horizontal displacement electric input, the output of which is the first output of the unit, the second output of the command decoder is connected to the input of the vertical movement electric drive, the output of which is the second output of the block, the third output of the command decoder is the third output of the block, and the input of the command decoder is the input of the block, and the control unit, the input of which is connected through its first output to the input of the video control unit, and the second output of the control unit to the input of the guidance block, a second television signal sensor, a sync pulse selector, a marker signal driver and a switching unit are introduced, the optical unit comprising a first lens, a translucent mirror, arranged in series and optically connected, from a reflecting mirror and a second lens, wherein the first output of the optical unit, which is the output of the second lens, is optically connected to the photo target of the first television signal sensor, and the second output of the optical unit, which is the second output of the translucent mirror, is optically connected to the photo target of the second television signal sensor, and guidance unit introduced a horizontal position sensor mechanically connected to the horizontal electric drive, and a vertical position sensor mechanically connected to the electric a vertical displacement source, wherein the horizontal position sensor output is the fourth output of the block, and the vertical position sensor output is the fifth output of the block, while the first output of the guidance block is mechanically connected with the horizontal movement of the second television signal sensor, the second output of the guidance block is the vertical movement of the second sensor of the television signal, the fourth output of the guidance unit is connected to the first control input of the signal former of the mark, and the fifth output is bl guidance: to the second control input of the marker signal shaper, the horizontal line input and the frame synchronization input of which are connected respectively to the first and second outputs of the clock selector, the input of which is connected to the output of the first television signal sensor and, respectively, to the first information input of the switching unit, the second information input of which connected to the output of the second sensor of the television signal, the third information input of the switching unit is connected to the output of the signal conditioner, control yuschy switching unit input - to the third output of the guidance unit, and the output switching unit - to the input of the control unit.

 Comparative analysis with the prototype shows that the inventive device is characterized by the presence of new units, including a second television signal sensor, a sync pulse selector, a marker signal former and a switching unit; a horizontal position sensor and a vertical position sensor as part of the guidance unit; other technical solution of the optical unit; as well as the presence of new links between the new and the rest of the blocks. The combination of these features is not known from the prior art, therefore, the proposed solution meets the requirement of novelty.

 In the claimed solution, the image formation of the enlarged fragment is carried out using the second sensor of the television signal, eliminating the need for a zoom lens. According to the technical result and methods for its achievement, the proposed solution meets the requirement of the presence of "inventive step".

 In FIG. 1 shows a structural diagram of a prototype device; in FIG. 2 is a structural diagram of the inventive device; in FIG. 3 is a block diagram of a switching unit; in FIG. 4 is a structural diagram of a signal driver; in FIG. 5 is an electrical diagram of a horizontal report block (as part of a signal signal former); in FIG. 6 is a timing chart explaining the operation of the horizontal reference block; in FIG. 7 shows the image of the mark in the form of a cursor on the screen of the video control unit after the adjustment process of the device.

 The television monitoring device comprises an optical unit 1, consisting of sequentially located and optically connected first lens 1-1, a translucent mirror 1-2, reflecting mirrors 1-3 and a second lens 1-4, the first television signal sensor 2, guidance unit 3, consisting from a decoder of 3-1 commands, an electric drive 3-2 of horizontal movement, an electric drive 3-3 of vertical movement, a sensor 3-4 of a horizontal position and a sensor of 3-5 vertical positions, a control unit 4, a video control unit 5, a second sensor 6 t a levion signal, a sync pulse selector 7, a marker signal generator 8 and a switching unit 9, the first output of the optical unit 1 being the output of the second lens 1-4 being optically coupled to the photo target of the first television signal sensor 2, and the second output of the optical unit 1 being the second output of the translucent mirror 1-2, is optically connected with the photo target of the second television signal sensor 6, the first output of the decoder 3-1 teams connected to the input of the horizontal drive 3-2, which mechanically ESKI is connected with the sensor 3-4 positions horizontally, the second output of the decoder 3-1 commands connected to the input of the electric drive 3-3 vertical movement, which is mechanically connected with the sensor 3-5 positions vertically, while the input of the decoder 3-1 is the input of the block 3 guidance, the output of the electric drive 3-2 - the first output of the block 3, the output of the electric 3-3 - the second output of the block 3, the third output of the decoder 3-1 - the third output of the block 32, the output of the sensor 3-4 - the fourth output of the block 3, the output of the sensor 3-5 - the fifth output of block 3, and the input of block 3 is connected to the WTO the output of the control unit 4, the first output of the unit 3 is mechanically connected with the horizontal movement of the second sensor 6, the second output of the unit 3 is with the vertical movement of the second sensor 6, the third output of the unit 3 is connected to the control input of the switching unit 9, the fourth output of the unit 3 - to the first control input of the shaper 8 of the mark signal, and the fifth output of block 3 - to the second control input of the shaper 8 of the mark signal, the horizontal line input and the frame synchronization input of which are connected respectively to the first and second at the outputs of the selector 7 clock pulses, the input of which is connected to the output of the first sensor 2 of the television signal and, accordingly, to the first information input of the switching unit 9, the second information input of which is connected to the output of the second sensor 6 of the television signal, the third information input of block 9 - to the output of the signal shaper 8 marks, and the output of block 9 to the input of the control unit 4 and through its first output to the input of the video control unit 5.

 The second sensor 6 of the television signal is made completely similar to the first sensor 2, i.e. similar to the television signal sensor of the prototype.

 It is preferable to use the widely used CA-H32C or CA-H33C modules of GOLDBEEM electrons (South Korea) as sensors 2 and 6, in which 1/3 inch CCD arrays with the number of elements 512 (N) x 582 (Y) are applicable.

 Assume that the Zenitar-M, 2.8 / 16 (Fisheye) lens is used as the first lens 1-1, and the T-55 lens is used as the second lens 1-4. Note that both lenses are designed and manufactured by domestic industry. Lens 1-1 forms an image with a frame format (36x24) mm. In the plane of this image, occupying a position centered horizontally and vertically, is the target of the sensor 6. Therefore, the sensor 6 registers an optical image of the central fragment with dimensions (4.8 × 3.6) mm, so that the second output of the optical unit 1 is formed enlarged optical image of the object with a zoom ratio equal to the ratio 24 / 3.6 = 6.66 ... times.

 On the other hand, the lens 1-4 transfers the image with the format (36x24) mm to the photographic target plane of the sensor 2, which, like for the sensor 6, has a format (4.8x3.6) mm. As a result, at the first output of the optical unit 1, a normal optical image of the control object is formed.

Block 9 switching is designed to form the output:
a) the full television signal of the normal image and the mark signal “superimposed” on it (in the “Select fragment” mode);
b) the full television signal of the enlarged image of the selected fragment (in the mode "Scaling of the fragment").

 The block diagram of the switching unit 9 is shown in FIG. 3. Block 9 contains a mixer 10, a first switch 11, a second switch 12, and an element NOT 13.

 The mixer 10 provides mixing the signal of the normal image coming from the first information input of block 9, and the signal mark from its third information input.

 Switches 11 and 12 can be made on the basis of managed keys of the KP590KH2 / 2 chip, p. 447 /, the inclusion of which occurs when a logical “0” signal is supplied to their control inputs. Therefore, when the logic signal “0” is supplied to the control input of block 9, the mixing signal from the output of block 10 through the switch 11 is fed to the output of block 9. If the logical “1” signal is present at the control input of block 9, then the signal of the enlarged image from the second information input unit 9 through the switch 12 is fed to its output.

 Shaper 8 is designed to receive the output signal "electronic" marks, for example, in the form of a cursor signal. A possible structural diagram of the former 8 is shown in FIG. 4. Shaper 8 comprises a horizontal reference block 14, a vertical reference block 15, and an And 16 element.

In FIG. 5 shows the electrical circuit of block 14, made on the basis of two chips DA1 and DA2 type K155AG1. Both chips in FIG. 5 are set to input logic control when the active edge is negative. The timing elements of the DA1 chip are the capacitor C _τ1 and the resistor R _τ1 = R $\genfrac{}{}{0ex}{}{\text{*}}{\text{x}}$ + R _PX , and DA2 microcircuits - C _τ2 and R _τ2 . In this case, the resistors R ^* _x and R _xn are elements of the horizontal position sensor 3-4, and the potentiometer R _px mechanically connected to the electric drive 3-2 is the horizontal cursor control.

An SSI horizontal sync pulse is fed to the 3rd output of the DA1 chip (see FIG. 6a), and the pulse signal shown in FIG. 6 is generated at the 6th output of DA1. 6b. Note that the limits of regulation of the negative edge of this pulse marked by a circle are shown in FIG. 6b by the arrows and are determined by the potentiometer R _ph value. The value of the pickup resistor R ^* _x provides the position of the specified negative edge within the active part of the line, excluding its "entry" in the reverse stroke of the horizontal scan t _o.h.s. . The output pulse of block 14 is removed from the 6th output of the DA2 microcircuit (see FIG. 6c), and its duration determines the width of the cursor observed on the screen of the video control unit 5, as shown in FIG. 7.

Block 15 counting vertically can be implemented in a similar electrical circuit (see Fig. 5), applying to the 3rd output of the chip DAI frame sync pulse KSI and choosing the values of the timing elements C _τ1 , R _τ1 = R $\genfrac{}{}{0ex}{}{\text{*}}{\text{y}}$ + R _py ; C _τ2 , R _τ2 . In this case, the resistors R ^* _y and R _PU are elements of the 3-5 position sensor vertically, and the potentiometer R _PU , mechanically connected with electric drives 3-3, is the vertical cursor control. The duration of the output pulse of block 15 determines the height of the cursor observed on the screen of the video control block 52, as shown in FIG. 7.

The guidance unit 3 is intended for spatial movement horizontally and vertically of the second sensor 6 of the television signal. This movement is performed using electric drives 3-2 and 3-3 according to the commands generated in the decoder 3-1. At the same time, the movement of the potentiometer R _ph and R _pu installed in the position sensors 3-4 and 3-5 is also performed. After passing the commands to the electric drives 3-2 and 3-3 at the third output of the decoder 3-1, the logical level “0” is replaced by the logical level “1” (automatically or at the command of the operator). In the process of manufacturing and tuning the inventive device, alignment of the guidance unit 3 is performed, which, when the potentiometer _slider positions are set, R _px R _pu, should provide the position of the second sensor 6 relative to the second output of the optical unit 1 so that the enlarged optical image projected onto the target is centered horizontally and vertically .

Upon completion of the adjustment, the image of the cursor on the screen of the video control unit 5 (see Fig. 7) should correspond to the positions of the potentiometer engines R _PX and R _PU given in the table.

 The clock selector 7 is designed to select from the full television signal generated at the output of the sensor 2, the pulses of the horizontal and frame frequencies. The technical solution of the selector 7 is known (see, for example, / 3, p. 150-156 /).

 The control unit 4 and the video control unit 5 according to the technical solution does not differ from the corresponding blocks of the prototype.

A television surveillance device operates as follows. Using the control unit 4, the operator, as in the prototype, sends the code messages of the control commands to the guidance unit 3. The decoder 3-1 "decrypts" the parcels, forming commands for controlling electric drives 3-2 and 3-3, which perform spatial movement horizontally and vertically of the second sensor 6 of the television signal. Simultaneously, the drive performs a proportional displacement engines potentiometers R and R _{nx ny} set in position sensors 3-4 and 3-5.

In the operation of the device, two modes must be distinguished:
"Fragment selection" (mode 1);
"Scaling a fragment" (mode 2).

 Regardless of the operation mode of the device, the input optical image along the optical path: the first lens 1-1, a translucent mirror 1-22, a reflecting mirror 1-3, the second lens 1-4 is projected onto the photo target of the first sensor 2 of the television signal. At the same time, the central fragment of this image along a different optical path: the first lens 1-1, a translucent mirror 1-2 is projected onto the photo target of the second television signal sensor 6. Images on the photo targets of each of the sensors are further converted to the corresponding video signals. As a result, at the input of the sensor 2, a full television signal of a normal image is formed with a 1 V range at a load of 75 Ohms. At the same time, the output of the sensor 6 produces a full television signal of an enlarged image of a similar magnitude at a similar load.

Regardless of the operating mode of the device, the driver 8 generates an electronic mark signal (cursor signal) at the output. Note that the cursor position within the active part of the television raster is determined depending on the position of the potentiometer engines R _PX and R _PU installed in the position sensors 3-4 and 3-5 of the guidance unit.

 The shaper 8 is synchronized in lines and frames from the full television signal of the sensor 6 using the selector 7, at the outputs of which pulses of line and frame frequencies (SSI and CSI) are generated.

 When the code messages from block 4 are sent to the guidance unit 3, and the electric drives 3-2 and 3-3 perform spatial movement of the television signal sensor 6 and the sensors 3-4 and 3-5, then the proposed television surveillance device operates in the "Select fragment" mode . At the same time, a logic “0” voltage is present at the control input of the switching unit 9, and a mixing signal arrives at the input of the video control unit 5 from the output of unit 9 through unit 4, the components of which are the full television signal from sensor 2 and the cursor signal from driver 8.

 As a result, the normal image of the control object with the cursor moving along it is displayed on the screen of the video control unit 5.

 Suppose that the cursor marks the center of a fragment operator of interest. Then, after the cursor stops (after completing the turns of the electric drives 3-2 and 3-3), an enlarged optical image is projected onto the photo target of the sensor 6, centered along the cursor in the horizontal and vertical directions. At the same time, at the control input of the switching unit 9, the voltage of the logical "0" is replaced by the voltage of the logical "1". Therefore, the claimed device switches to the "Scale fragment" mode, and an enlarged image of the fragment appears on the screen of the video control unit 5. If the operator needs to control the enlarged image of another fragment, then he must return to the "Select fragment" operating mode.

 Next, the operator selects a new fragment of the normal image of interest to him using the cursor, giving the code message from the control unit 4 to the guidance unit 3. After that, the device is again transferred to the "Scale fragment" mode, and on the screen of the video control unit 5, an enlarged image of the selected fragment is set.

In the claimed solution, the guidance unit performs spatial movement of only the television signal sensor, therefore, the payload required from the guidance unit is significantly lower in comparison with the prototype. The speed of execution of the operation "Scaling a fragment" is higher, because completely excludes the time T _f changes (adjustment) of the focal length. When returning to the original presented image, the speed of the operation is further enhanced due to the exception and the time T _n guidance.

 Currently, all blocks of the claimed solutions are mastered or can be mastered by domestic industry, therefore, the proposed invention should be considered as meeting the requirement of "industrial applicability".

Sources of information
1. Bogdanov G.M. Applied television installations. - M .: Communication, 1979

 2. Digital and analog integrated circuits: Reference / C.V. Yakubovsky, L.I. Nisselson, V.I. Kuleshov et al. Ed. S.V.Yakubovsky. - M .: Radio and communications, 1990.

 3. Bykov R.E., Signals V.M., Ijssengardt G.A. A television. - M.: High School, 1988

Claims (1)

 A television monitoring device comprising an optical unit, a first television signal sensor, a guidance unit, consisting of a command decoder, a horizontal displacement electric drive and a vertical displacement electric drive, the first output of the command decoder being connected to the horizontal displacement electric input, the output of which is the first output of the block, the second output the command decoder is connected to the input of the vertical displacement electric drive, the output of which is the second output of the unit, the third in the command decoder’s progress is the third output of the unit, and the command decoder’s input is the unit’s input, as well as the control unit, the first output of which is connected to the input of the video control unit, and the second output of the control unit is to the input of the guidance unit, characterized in that a second television signal sensor is introduced equipped with shifts of movement horizontally and vertically, respectively, a clock selector, a marker signal generator and a switching unit, the optical unit comprising sequentially located and optically coupled the first lens, a translucent mirror, a reflecting mirror and a second lens, while the first output of the optical unit, which is the output of the second lens, is optically connected to the photo target of the first sensor of the television signal, and the second output of the optical unit, which is the second output of the translucent mirror, is optically connected to the photo target a second television signal sensor, and a horizontal position sensor mechanically coupled to the horizontal horizontal electric drive and a position sensor p vertically mechanically connected with the vertical displacement electric drive, wherein the horizontal position sensor output is the fourth block output, and the vertical position sensor output is the fifth block output, while the first input of the guidance block is mechanically connected with the horizontal movement of the second television signal sensor, the second guidance unit output - with the vertical movement of the second television signal sensor, the fourth output of the guidance unit is connected to the first control input ph the signal generator, and the fifth output of the guidance block to the second control input of the marker signal generator, the horizontal line input and the frame synchronization input of which are connected respectively to the first and second outputs of the clock selector, the input of which is connected to the output of the first television signal sensor and, accordingly, to the first information input the switching unit, the second information input of which is connected to the output of the second sensor of the television signal, the third information input of the switching unit is to Exit shaper signal mark, the control input of the switching unit - to the third output of the guidance unit, and the output switching unit - to the input of the control unit.

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