SU559458A1 - Device for tracking a point object - Google Patents

Description

one

The invention relates to television and can be used to track point objects.

A device for tracking a point object is known, which contains sequentially connected feed TV. the camera, the threshold unit, the first element And, and the inverter, as well as the inverter strobe and sync block fl.

However, in the known device there are tracking failures at low signal-to-noise ratio.

The purpose of the invention is to increase the noise immunity. To do this in a device for tracking

point object containing serially connected transmitting television camera, threshold unit, first element AND and inverter, as well as strobe pulse generator and sync block, sequentially connected second element AND, first element OR and coordinate block, one of the outputs of which is connected to each other the first input of the first element AND, to the output of which is also connected through the input delay unit one of the inputs of the input second element OR, the output of which through the input trigger and connected to the first input of the entered third element And, the second input of which is connected to the output of the inverter, and the third input is connected to the first output of the input switching trigger, the second output of which is connected to the first input of the second element And, the second input of which is connected to the output of the inverter, and output the third element AND is connected to the input of the first element OR, while the input of the transmitting chamber, another input of the second element OR, the input of the switching trigger and the other input of the coordinate block are connected to the output of the sync block.

The drawing shows a structural electrical circuit of the proposed device.

Claims (1)

The device contains a series-connected transmitting television camera 1, a threshold unit 2, the first element AND 3, an inverter 4, a second element AND 5, a first element OR O, a coordinate unit 7 and a strobe pulse generator 8. The output of the first one. element AND is connected via sequentially connected delay unit 9, the second epement OR 10 and the inhibit trigger 11 to the first input of the third element AND 12, the second input of which is connected to the output of the inverter 4, the third input to one of the switching trigger outputs 13, and the output to the second the input of the first element OR 6, d | eugoy the output of the switching trigger 13 is connected to one of the inputs of the second element AND 5. The output of the strobe pulse generator 8 is connected to the second input of the first element AND 3. The input of the transmitting chamber 1, the second input of the second element OR 10, the trigger triggerThe device 13 and the second input of the coordinate unit 7 are connected to the output of the cr-shchroblock 14. The device operates as follows. The transmission chamber 1 of the transmitting camera 1 is compared with the threshold level of threshold 2, the advantageous KOTOpoixi pulses corresponding to the threshold threshold exceeding 1, are controlled by the gate pulse first. element And 3 are fed to the inputs of in, -verter 4 and delay block 9, the output of which is connected to the input of the second element OR 10, From the output of the inverter 4, the pulses are fed to the inputs of the second 5 and TpeTbeiXD 12 elements And, the outputs of which are through The first ground OR 6 is connected to the coordinate block 7, which controls the pulse generator 8. The trigger trigger 13 carries out personnel switching of the resolution potentials on the second 5 and third 12 elements AND, to which inputs its antiphase outputs are connected. The third element And 12 is additionally controlled by the output potential of the inhibitor trigger 11. If in this frame the switching trigger 13 is in the state allowing the output pulses of the inverter 4 to pass through the second element 5, then the coordinate pulses of the threshold pulse will pass to the coordinate unit 7 block 2 o As a result, the coordinate block 7 remembers the coordinates of the last of these pulses. In the next frame, trigger switch 13 changes its state by prohibiting the passage of pulses of threshold block 2 through the second element. nt And 5 and allowing passage through the third element And 12. The inhibit trigger 11, is set to one at the beginning of each frame by a synchronization pulse and also permits the passage of pulses through the third element And 12. The first of the output pulses of the threshold block 2, caught in this the frame at the strobe pulse zone, the third element I 12 passes to the coordinate block 7, which stores its coordinates. The same impulse, delayed by the delay unit 9 on the rem, equal to its duration, through the element OR 10 will arrive on the course of the trigger of apret 11 and; setting the last to zero, the permitting potential from the input of the input is And 12. This thereby excludes the creation of all subsequent pulses of the threshold block 2 at the address of the coordinate block 7. Thus, the coordinates of the first and the last will be recorded alternately in the coordinate block from the pulses of the threshold block to the strobe pulse zone. As a result, the center of the strobe zone will fluctuate around the image of a point, object, and two (or more) following one after another displacements in the same direction are excluded. The image of the object does not extend beyond the strobe zone, and tracking does not fail. An apparatus for tracking a point object, comprising a serially connected transmitting television camera, a threshold unit, a first AND element and an inverter, as well as a strobe pulse generator and a sync block, characterized in that, in order to improve the noise immunity, the second element And, first the OR element and the coordinate block, one of the outputs of which is connected through a stubimpulse generator to another input of the first element AND, to the output of which is also connected through an input the delay unit is one of the inputs of the entered second element OR whose output through the input of the inhibit trigger is connected to the first input of the entered third element AND, the second input of which is connected to the output of the inverter, and the third input is connected to the first output of the input tri-switch circuit, the second output of which is connected to the first input of the second element And, the second input of which is connected to the output of the inverter, and the output of the third element AND is connected to another input of the first element OR, while the input of the transmitting chamber, another input of the second the OR element, the input of the switching trigger and the other input of the coordinate block are connected to the output of the sync block. Sources of information taken into account in the examination: 1. US patent: № 3700799.1 / cl. 1786, 1972.