RU94722U1 - INFRARED CIRCLE REVIEW SYSTEM - Google Patents

Abstract

 1. An infrared circular viewing system, comprising a fixed base, a platform mounted on it with an optical-mechanical unit located on it that rotates primarily around a vertical axis and has a photodetector and a signal preprocessing unit equipped with a rotation drive and a horizontal angle sensor installed in the optic -mechanical unit, an IR optical system, optically coupled to a photodetector and connected to a signal preprocessing unit, which, in its the turn is connected with a fixed base, consisting of a video monitoring device and an optical image processing unit, revealing that the pairing of the rotating optical-mechanical unit with a photodetector and the preliminary processing unit with a fixed base is made through a fiber optic data transmission unit. ! 2. The infrared circular viewing system according to claim 1, characterized in that the platform is gyrostabilized. ! 3. The infrared circular viewing system according to claim 1, characterized in that the data transmission unit for the optical fiber is made in the form of a cut of the optical fiber into two parts with the formation of an air gap between both its parts, with one part of the optical fiber connected to a rotating optical-mechanical unit, and the second fixed on a fixed base.

Description

The inventive utility model relates to the technique of infrared (IR) systems of optical instrumentation and can be used in observation and sighting systems of all-round visibility.

IR systems detect objects by their own thermal radiation, which allows them to work in a passive mode at any time of the day. In addition, IR systems have high spatial resolution, which ensures high accuracy in determining the coordinates of objects.

A device is known for the infrared system of a circular overview of space (see J. Gossorg, "Infrared Thermography", Moscow, ed. Mir, 1998, p. 193), designed for panoramic (circular) viewing by continuous rotation of the head, containing IR - an optical system, an infrared receiver and a rotating collector for outputting information from a rotating head to an information display device.

The disadvantages of this device are:

- insufficient field of view, as the rotation of the head with the IR system occurs only around the vertical axis;

- low speed of rotation of the head;

- unreliable and short-lived rotating collector for outputting information from a rotating head.

Also known device IR circular viewing system according to patent US 4221966, publ. 09/09/1980, containing a fixed base on which a platform is mounted with the possibility of rotation about a vertical axis. The platform is rotated horizontally by the drive and is controlled by a platform angle sensor, the corresponding nodes of which are mounted on a rotating platform and a fixed base. An IR system containing an IR lens that is optically coupled to an N-element (multi-element) IR radiation receiver is rigidly mounted on a rotating platform. The infrared radiation receiver is connected to a closed cooling system and connected to a N-channel block of normalizing amplifiers, an N-channel analog-to-digital converter and an electronic switch. The known IR system also contains an information transmission channel associated with an information display and control device, which is designed as a personal computer with a display and located outside the platform.

The disadvantages of the known analogue are:

- requiring special control circuits high-frequency collector device;

- backgrounds and interference during the operation of the device, the elimination of which requires special circuits and technical methods.

The closest analogue in the set of essential features to the claimed invention is the IR circular viewing system according to patent RU 2189049 C1, publ. 09/10/2002, containing a fixed base, a platform mounted on it, rotating mainly around a vertical axis, equipped with a drive and a horizontal angle sensor. Installed on the platform: IR-optical system containing an IR lens, a N-element IR-receiver, a N-channel analog-to-digital converter and an electronic switch, as well as an information transmission channel located outside the platform, connected in series.

The disadvantages of the known closest analogue are:

- insufficiently high image quality of information transmitted from a rotating platform through a high-frequency collector device to a display device;

- insufficient noise immunity of signals transmitted by a rotating platform;

- low platform rotation speed - 40 rpm.

The problem to which the proposed utility model is directed is to increase the efficiency of observing the IR circular viewing system.

The technical result consists in the fact that the rotation speed of the infrared system overview is increased to 60 rpm.

To achieve the specified technical result in the known device of the infrared system of circular viewing, containing a fixed base mounted on it with a platform located on it rotating, mainly around a vertical axis, an optical-mechanical unit with a photodetector and a signal preprocessing unit equipped with a rotation drive and a sensor angle of rotation horizontally mounted in the optical-mechanical unit IR-optical system, optically paired with photodetector devices m and the associated signal preprocessing unit which, in turn, linked to the fixed base which consists of a monitor device and the optical image processing unit,

- pairing of the rotating optical-mechanical unit with a photodetector and a signal preprocessing unit with a fixed base is performed through a fiber optic data transmission unit;

- the platform is gyrostabilized;

- the data transmission unit for the optical fiber is made in the form of a cut of the optical fiber into two parts with the formation of an air gap between both parts of the optical fiber, with one part connected to a rotating optical-mechanical unit, and the second mounted on a fixed base.

In the infrared circular viewing system, a new set of structural elements, as well as the presence of connections between them, allow for better and more reliable transmission of digitized, pre-processed signals using a fiber optic cable from a rotating optical-mechanical unit with a photodetector and a signal preprocessing unit, through a data transmission unit over fiber into a fixed optical communication module for further processing. In addition, significantly increases the noise immunity of the transmitted signals.

The essence of the proposed technical solution is illustrated by the drawing, which shows a block diagram of an infrared circular viewing system.

The infrared circular viewing system contains a fixed base 1, a platform 2 mounted on it. On the platform 2 there is a rotating, mainly around a vertical axis, optical-mechanical block 3 with a photodetector 4 and a signal preprocessing unit 5. Photodetector 4 is made in the form of N -element photodetector. The optical-mechanical unit 3 is made with both narrow-field and wide-field IR systems. In the signal preprocessing unit 5, the signal from the photodetector 4 is digitized and pre-processed. The optical-mechanical unit 3, the photodetector 4 and the signal preprocessing unit 5 are equipped with a rotation drive 6 and a horizontal angle sensor 7. In the optical-mechanical unit 3, an IR-optical system 8 is installed, which is optically coupled to the photodetector 4 and connected to signal preprocessing unit 5. Signal preprocessing unit 5, in turn, is connected to a fixed base 1, which consists of a video monitoring device 11 and an optical image processing unit 12. e of the rotating optical-mechanical unit 3 with a photodetector 4 and a signal preprocessing unit 5 with a fixed base 1 is made through a data transmission unit for fiber 9. The fiber is divided into two parts with the formation of an air gap between both its parts so that one part of the fiber is connected with a rotating optical-mechanical unit 3, and the second part is mounted on a fixed base 1. Platform 2 is gyrostabilized. The digitized signal is transmitted to the fixed base 1 through the optical communication module 10.

The inventive IR circular viewing system operates as follows. Scanning the field of view horizontally is provided by rotation around the vertical axis of the rotating optical-mechanical unit 3, equipped with a rotation angle sensor (not shown) and a rotation drive 6. The infrared image formed by the optical-mechanical unit 3 is focused on the photodetector 4. Read by an N-element photodetector device 4, the IR image enters the signal preprocessing unit 5, where it is digitized and pre-processed. Then it enters the data transmission unit via optical fiber 9. The use of data transmission via optical fiber 9, cut into two parts with an air gap between them, allows for faster data transfer from the rotating optical-mechanical unit 3 to the fixed base 1.

Thus, the task is solved and a technical result is achieved, consisting in a better and more reliable signal transmission with greater noise immunity compared to analogs, and, as a result, an increase in the rotation speed of the review to 60 rpm with high quality of the received image, which further analyzed by the operator.

Claims (3)

1. An infrared circular viewing system, comprising a fixed base, a platform mounted on it with an optical-mechanical unit located on it that rotates primarily around a vertical axis and has a photodetector and a signal preprocessing unit equipped with a rotation drive and a horizontal angle sensor installed in the optic -mechanical unit, an IR optical system, optically coupled to a photodetector and connected to a signal preprocessing unit, which, in its the turn is connected with a fixed base, consisting of a video monitoring device and an optical image processing unit, revealing that the pairing of the rotating optical-mechanical unit with a photodetector and the preliminary processing unit with a fixed base is made through a fiber optic data transmission unit. 2. The infrared circular viewing system according to claim 1, characterized in that the platform is gyrostabilized. 3. The infrared circular viewing system according to claim 1, characterized in that the data transmission unit for the optical fiber is made in the form of a cut of the optical fiber into two parts with the formation of an air gap between both its parts, and one part of the optical fiber is connected to a rotating optical-mechanical unit, and the second is fixed on a fixed base.