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Dual-technology detector based on temperature bidirectional compensation

A double-detection detector and two-way compensation technology, applied in the field of detectors, can solve problems such as false alarms and high product sensitivity

Inactive Publication Date: 2019-02-15
奥泰斯电子(东莞)有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] In view of this, the present invention aims at the deficiencies in the prior art, and its main purpose is to provide a dual-detection detector based on bidirectional temperature compensation, which is used to solve the problem of excessive product sensitivity due to local temperature rise and unidirectional temperature compensation. The problem of generating false positives

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  • Dual-technology detector based on temperature bidirectional compensation
  • Dual-technology detector based on temperature bidirectional compensation

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Embodiment Construction

[0036] Please refer to figure 2 As shown, it shows the specific structure of the preferred embodiment of the present invention, including PIR sensor 10, microwave sensor 30, PIR amplifying circuit 20, microwave amplifying circuit 40, temperature conversion circuit 70, single-chip processing unit 50 and alarm output Circuit 60. Wherein, each functional circuit is connected with the processing unit 50 of the single-chip microcomputer. For the specific composition and framework of each circuit, see Figure 3 to Figure 6 .

[0037] Such as image 3 As shown, the PIR sensor 10 is used to detect PIR radiation from a human body. Described PIR amplifying circuit 20 comprises PIR primary amplifying circuit and PIR secondary amplifying circuit, and this PIR sensor 10 amplifies the weak PIR signal that detects by PIR primary amplifying circuit 21 and PIR secondary amplifying circuit 22, by output Terminal TP1 is sent to the processing unit 50 of the single-chip microcomputer. Its ...

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Abstract

The invention discloses a dual-technology detector based on temperature bidirectional compensation, comprising a PIR sensor, a microwave sensor, a PIR amplification circuit, a microwave amplificationcircuit, a temperature conversion circuit, a single-chip microcomputer processing unit and an alarm output circuit. The dual-technology detector based on temperature bidirectional compensation comprises the following steps of: receiving analog voltage signals transmitted from the PIR amplification circuit through the single-chip microcomputer processing unit, and monitoring whether the voltage exceeds a PIR threshold voltage or not; receiving analog voltage signals transmitted from the microwave amplification circuit, and monitoring whether the voltage exceeds a microwave threshold voltage ornot; collecting the voltage of the temperature conversion circuit in real time, and performing real-time compensation of the PIR threshold voltage and the microwave threshold voltage according to thetemperature condition; and finally, comprehensively judging the PIR analog signal and the microwave signal, and determining whether to generate an alarm output according to the PIR threshold voltage and the microwave threshold voltage condition after temperature compensation. The dual-technology detector can maintain the proper sensitivity without the conditions that the sensitivity is high at lowtemperatures and is low at high temperatures due to temperature changes.

Description

technical field [0001] The invention relates to the technology in the field of detectors, in particular to a dual-detection detector based on bidirectional temperature compensation. Background technique [0002] At present, most of the anti-theft alarm detectors on the market use a one-way temperature compensation method, that is, when the temperature changes, the PIR voltage threshold is simply compensated, while the microwave voltage threshold remains unchanged. This will cause a phenomenon of excessive sensitivity due to a local increase in temperature. [0003] Such as figure 1 As shown, when the detector is installed on a wall that is partially irradiated by sunlight, or installed directly above a heating cabinet. Due to local sunlight, the temperature of some areas where the sensor is installed will rise, or due to the rise of hot air in the heating cabinet, the temperature of the local area of ​​the sensor will rise. If the temperature unidirectional compensation m...

Claims

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Application Information

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IPC IPC(8): G08B13/191G08B13/24
CPCG08B13/191G08B13/2494
Inventor 杨贤平李洪林小军姚伟宇
Owner 奥泰斯电子(东莞)有限公司
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