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Three-beam active infrared intrusion detector

An infrared and three-beam technology, applied in the direction of instruments, alarms, anti-theft alarms, etc., can solve the problems of poor reliability, small warning distance range, easy to generate false alarms, false alarms, etc., to achieve sensitivity at the receiving end, reduce light or Signal interference, the effect of improving stability

Inactive Publication Date: 2009-07-08
深圳市信威电子有限公司
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Problems solved by technology

However, this kind of active infrared intrusion detector has a small range of warning distance and poor reliability, which is prone to false alarms and false positives.

Method used

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  • Three-beam active infrared intrusion detector
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Embodiment Construction

[0016] In order to illustrate the idea and purpose of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] See figure 1 As shown, the present invention provides a three-beam active infrared intrusion detector, which mainly includes a transmitter 1, a receiver 2 and a control host, wherein the transmitter 1 is mainly composed of a column mask 101, an infrared emission tube 102, a column 103 and an installation The infrared emission circuit inside the column 103 is formed, wherein the column 103 is respectively equipped with three infrared emission tubes 102, the infrared emission tubes 102 are connected with the infrared emission circuit, and the column mask 101 is installed outside the column 103, and the column mask 101 here also plays a role in filtering. The effect of light; and the receiver 2 is mainly composed of a column mask 201, an infrared receiving tube 202, a Fre...

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Abstract

The invention discloses a device for detecting the invasion by three beams of active infrared light. The device comprises a transmitter, a receiver and a control main frame, wherein, an infrared emission circuit and an infrared emission tube are arranged in the transmitter; a corresponding infrared reception circuit and an infrared reception tube are arranged in the receiver; the infrared emission tube communicates with the infrared reception tube through an infrared signal; the infrared reception tube in the receiver is further equipped with a Fresnel lens, wherein, the external surface of a lens of the Fresnel lens is smooth, concentric circles are arranged on the internal surface in the order of size, and equidistant teeth-like patterns are formed on one side; and the transmitter is connected with the control main frame through the infrared reception circuit. Compared with the prior art, the invention uses the Fresnel lens to focus the beams of light, so that the receiving end is more sensitive, and a vigilance distance for raising the alarm is optimized. The infrared emission carrier frequency modulation technology is adopted for reducing interference by other light or signals, thereby ensuring the detector works more stable.

Description

Technical field: [0001] The invention belongs to the technical field of safety protection products, in particular to a three-beam active infrared intrusion detector. Background technique: [0002] With the diversification of theft and criminal activities and the enhancement of people's safety awareness, active infrared intrusion detectors are installed in many residential areas, buildings and important places to alarm when someone illegally intrudes. [0003] The commonly used active infrared intrusion detectors are mainly composed of an active infrared transmitter and an active infrared receiver. When the infrared pulse beam between the transmitter and the receiver is completely blocked or blocked by a set percentage, it can generate Alarm. However, this kind of active infrared intrusion detector has a small range of warning distance and poor reliability, which is prone to false alarms and false alarms. Invention content: [0004] For this reason, the object of the pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B13/183
Inventor 甘奎文
Owner 深圳市信威电子有限公司
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