RU29435U1 - MONITORING PROTECTIVE CASE - Google Patents

Abstract

The protective casing of the surveillance device, made in the form of a housing with a power source and a video signal transmission device and having holes in the ends, one of which is under the lens of the television camera, and the other for accommodating cable entries, with a visor mounted to move along the rails on lateral surfaces of the housing, characterized in that a thermoelectric module is installed on the upper surface of the camera, the operation of which is based on the use of the Peltier effect, and the camera body protected against heat loss with a heat insulator.

Description

MONITORING PROTECTIVE CASE.

The utility model relates to security measures, in particular to the components of devices for protecting various types of television cameras from adverse external influences.

There are various designs of security equipment with varying degrees of equipment with auxiliary devices, allowing to expand their functionality (1-5).

The well-known video motion detector (1) provides for capturing intrusions in a wide range of speeds and displacement values of intrusion objects regardless of changes in illumination in the control zone due to the presence of a multifunctional electronic signal processing circuit in the device.

Using the security and surveillance system (2) allows video surveillance of a large number of objects with the ability to record, analyze, process information and create a database with its subsequent update, and also allows monitoring not only from a certain remotely remote control, but also unlike ( 1) directly from the apartment. This makes it possible to use the system offline (as an electronic watchman).

A device for monitoring protected areas (3) inside and / or outside buildings is much cheaper to manufacture than the previous ones, and installation is simpler. At the same time, in the finished

to work condition is especially imperceptible.

The monitoring system (4) may contain more than one television system and a control circuit that allows you to issue a signal to activate an alarm when certain limit values are reached by one or more parameters.

The intruder detection system (5) is similar to (4), but is equipped with a source of infrared radiation in each channel.

Features of the operating conditions of modern television cameras are that they are operable in the range of ambient temperatures from -10 ° C to + 40 ° C. To ensure the operability of cameras at ambient temperatures above or below the specified values, a device is needed that protects the camera from thermal exposure to the environment.

MKI 6: G 08 at 13/196, H 05 K 5/00, 02

This device is a universal protective casing for accommodating various television cameras, with high dust and moisture protection, made in the form of a housing with a power source and a video signal transmission device and having holes in the ends, one of which is under the lens of a television camera, and the other for accommodating cable entries, it is equipped with a visor mounted to move along the rails on the side surfaces of the housing and a heater with a thermostat, and The second element is mounted on the upper surface of the camera, and between the lower surface of the camera and the casing body there is a gasket made of thermal insulation material. A device for galvanic isolation of a signal from a television camera from a video signal transmission line allows you to get rid of the influence of electromagnetic interference. To power the television camera and control devices there is a variable voltage converter. There is a device for maintaining the transparency of the window.

The advantages of the prototype include the possibility of using various television cameras in its composition, a wide range of supply voltages, an expanded temperature regime of use up to -50 ° C, low power consumption with a supply voltage that is safe for people in open air, as well as increased reliability due to immunity to electromagnetic interference.

The disadvantages of the device include the lack of the ability to maintain the operating temperature of the camera at temperatures above + 40 ° C, which leads to a significant narrowing of the climatic zones of the use of video surveillance systems.

Maintaining the temperature of the camera in the prototype when exposed to temperatures above + 40 ° C is fundamentally impossible, since the existing temperature control device provides only the bulk of the camera.

The technical problem solved by the proposed utility model is to create a device that allows you to maintain the operating temperature of the camera at ambient temperatures from -60 ° C to + 70 ° C. In this case, supply voltages that are safe for humans in the open air are used.

The technical result achieved by using the proposed solution is to significantly expand the climatic zones of the use of cameras and the absence of loss of information under any weather conditions, to use a power supply for the camera and a heater voltage supply, safe for human life.

The specified technical result is achieved by the fact that in the protective casing of the monitoring device, made in the form of a housing with a power source and a video signal transmission device placed in it and having holes in the ends, one of which is under the lens of the television camera, and the other for accommodating cable entries and

equipped with a visor installed with the ability to move along the guides on the side surfaces of the housing and a heater with a thermostat, a new one is that a thermoelectric module is installed on the upper surface of the camera, the operation of which is based on the use of the Peltier effect, and the camera body is protected from heat loss by means of a heat insulator.

The installation of a thermoelectric module, which is essentially a bi-directional solid-state heat pump, i.e., a device that allows the transfer of thermal energy from a lower to a higher temperature level, makes it possible to solve the problem of thermostating a camera in a wide range of ambient temperature.

A significant reduction in heat loss associated with the placement of a thermoelectric module on the camera body, thermally insulated from casing parts in contact with ambient air, led to a sharp increase in its efficiency and lower energy consumption of the entire device.

The temperature sensor, made in the form of an integrated circuit, provides the necessary electrical signals to control the thermoelectric module.

Thanks to the proposed combination of features, the claimed device has expanded functional and operational capabilities, namely: it becomes possible to use it as part of various all-weather CCTV systems operating in a wide temperature range (both negative and positive). The work safety is increased due to the absence of stresses dangerous to human life in the casing.

The figure shows a diagram of the inventive device. The protective casing contains a housing (4), with a visor (7), a television camera (2) mounted on a mounting plate (9) in a heat-insulating housing (1) behind a window (8) in the end of the housing (4) and connected to a variable voltage converter (b), hermetic inlets (11) of which are placed in holes on the other end of the housing (1). A galvanic isolation (10) is installed between the television camera (2) and the video signal transmission line with a sealed terminal (11) at the end of the housing (4). The thermoelectric module (3) with a temperature sensor (5) is mounted on the upper surface of the camera body and connected to a variable voltage converter (6). The heat generated by the thermoelectric module through heat conduits (12) is displayed on the casing body (4).

The device operates as follows: the video signal from the television camera through the galvanic isolation device enters the transmission line, supplied to the device through a sealed input. Thermoelectric module together with

.

a temperature sensor maintains the required temperature of the camera, thermally insulated from the casing, with a changing ambient temperature. The voltage converter provides power supply to all devices of the casing.

To test industrial applicability, a prototype device was made in which a television camera (for example, the Watec brand) was placed in a standard casing. A commercially available thermoelectric module is used. The module control circuit is based on an integral temperature controller.

Tests of the prototype showed flawless operation of the camera at an ambient temperature of -60 ° C to + 70 ° C without loss of information. At the same time, the current consumed by the device did not exceed 1200 mA, with a supply voltage of 24V. According to the test results, we can conclude that there is a significant expansion of functionality and operational characteristics with significant changes in external temperatures.

USED INFORMATION SOURCES:

1. The author's certificate of the USSR 1774361, publ. 11/07/92, bull. No. 41, cl. G 08 V 13/196, “Video motion detector.

2. Patent RU 2120139 C1, publ. 10/10/98, bull. No. 28, cl. G 08 B 13/196, BUT 4M 11/04, “Security and surveillance system.

3. Patent DE 4402535 A1, publ. 08/03/95, class BUT 4N 5/247, 7/18 “Device for monitoring protected areas.

4. Patent DE 4314483 A1, publ. 11/10/94, cl. G067 15/70 "Surveillance system.

5. Patent RU 0004178 publ. 05/16/97, class G 08 B 13/196, “Intruder Detection System.

6. Certificate for utility model RU 20599 U1 publ. November 10, 2001, Bull. No. 31, cl. G 08 B 13/196, H 05 K 5/00 "The protective cover of the surveillance device is a prototype.

Claims (1)

The protective casing of the surveillance device, made in the form of a housing with a power source and a video signal transmission device and having holes in the ends, one of which is under the lens of the television camera, and the other for accommodating cable entries, with a visor mounted to move along the rails on lateral surfaces of the housing, characterized in that a thermoelectric module is installed on the upper surface of the camera, the operation of which is based on the use of the Peltier effect, and the camera body protected against heat loss with a heat insulator.