RU27738U1 - KEY DEVICE - Google Patents

Description

The utility model relates to the field of electrical engineering and can be used in combination with various devices where electron-optical converters (EOCs) of 2 and 3 generations are used.

A device is known, an optical - electronic target indicator VOLCAN, which contains an image intensifier tube, a TV camera, a gating unit, a laser IR illuminator (source). The known device due to the method of gating in range has very high characteristics to combat electronic countermeasures. A disadvantage of the known device is the narrow range of operation of the image intensifier tube.

The closest technical solution is a device containing three power sources and a key that allows you to change the conversion coefficient of the image intensifier over a wide range (US patent “NIGHT VISION DEVICE HAVING IMPROVED AUTOMATIC BRIGHTNESS CONTROL AND BRIGHT-SOURCE PROTECTION, IMPROVED POWER SUPPLY FOR SUCH A NIGHT VISION DEVICE , AND METHOD OF ITS OPERATION No. 5,949,063 September 7,1999r).

The disadvantage of the closest technical solution is the bulkiness, as well as the complexity of the process of controlling an electron-optical converter.

The purpose of the proposed technical solution is to reduce the size of the device, simplifying the process of controlling an electron-optical converter.

This goal is achieved in that a photodetector, a control unit, a resistor and a second electronic key located parallel to the first are introduced into a device containing a secondary power source and an electronic key and an electron-optical converter arranged in parallel with it. The input of the control unit is connected to the output of the photodetector, and two of its outputs are connected to the inputs of the keys. The key outputs are connected to the photocathode. The secondary power source is connected in series through a resistor to the electron-optical converter.

Introduction to the inventive device photodetector allows you to automatically determine the boundary between continuous and pulsed operation of the image intensifier tube. Introduction to the device of two keys provides three modes of operation of the image intensifier tube and reduces the dimensions of the device.

electronic keys 4 and 5, resistor 6 and image intensifier tube 7.

The key device works as follows:

- the first mode of operation with illumination from 10-4 to 1 lux. The secondary power source 3 generates a constant voltage of 200 - 400V, which is supplied through a series-connected resistor 6 to the photocathode of the image intensifier tube 7. The image intensifier operates in a continuous mode;

-second mode of operation with illumination of more than 1 lux. The photodetector 1, generates a control signal, which is fed to the control unit 2. The control unit 2 generates signals with a frequency F, which are supplied to the key 4, which provides the closed state of the image intensifier tube 7, and also generates signals with a frequency F / n, which are supplied to the key 5, ensuring the open state of the image intensifier tube 7. The image intensifier tube operates in a pulsed mode;

the third mode of operation with external synchronization, while the control unit 2 receives clock pulses of frequency f. The control unit 2 generates signals with a frequency f, which are supplied to the key 5, which ensures the open state of the image intensifier tube 7. After a certain time interval, the control unit 2 generates pulses with the frequency, which arrives at the key 4, which ensures the closed state of the image intensifier tube 7. The image intensifier tube works synchronously with peripheral devices, for example with a pulsed laser.

The duration of the open state of the image intensifier tube 7 is determined by the time interval between the two pulses that form the control unit 2 and the keys 4 and 5. The closed state of the image intensifier 7 is provided by many pulses that form the control unit 2 and the key 4.

The positive effect of the proposed technical solution lies in the fact that the device, having small dimensions and weight, allows you to expand the dynamic range of the image intensifier tube and ensure the operation of the image intensifier synchronously with peripheral devices.

The use of the utility model in products using three operating modes allowed expanding the tactical and technical characteristics of the observational devices of armored vehicles.

Claims (2)

1. The key device, containing a series-connected electronic key, an electron-optical converter (EOP) and a parallel-connected secondary power source, characterized in that a photodetector, a control unit, a resistor and a second electronic key located parallel to the first are inserted into it, while the input the control unit is connected to the output of the photodetector, and two outputs are connected to the keys (through the keys to the photocathode). 2. The device according to claim 1, characterized in that the secondary power source is connected in series through a resistor to an electron-optical converter.