Active infrared anti-theft alarm
An anti-theft alarm, active technology, applied in the direction of anti-theft alarms, alarms, instruments, etc., can solve the problems of enlargement and shortened life of infrared light-emitting diodes, and achieve the effect of improving reliability and prolonging service life.
Inactive Publication Date: 2012-05-09
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
[0002] The existing active infrared alarm, because there are a lot of interference factors in the use environment, such as fog, rain, snow, etc., these factors will attenuate the infrared pulse signal. In order to overcome the false alarms that may be caused by these factors, the infrared emission The method of the infrared pulse signal strength sent by the module makes the infrared pulse signal strength contain a large amount of design margin strength, and a large amount of design margin strength shortens the life of the infrared light-emitting diode
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[0008] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0009] Such as figure 1 As shown, in the infrared emitting module, one end of the first inductor L1 is connected to the 12V DC power output end of the main control module, and the other end is connected to the anode of the first diode D1 through the first resistor R1; the anode of the first capacitor C1 Connected to the cathode of the first diode D1, the cathode of the first capacitor C1 is connected to the power ground, the third capacitor C3 is connected in parallel to the first capacitor C1; one end of the second resistor R2 is connected to the cathode of the first diode D1 , the other end is connected to the positive pole of the first infrared light emitting tube LED1; the negative pole of the first infrared light emitting tube LED1 is connected to the positive pole of the second infrared light emitting tube LED2, and the negative pole of the second infra...
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The invention relates to an infrared anti-theft alarm, and discloses an active infrared anti-theft alarm. The active infrared anti-theft alarm comprises an infrared emission module, an infrared receiving module and a master control module, wherein both the infrared emission module and the infrared receiving module are electrically connected with the master control module; the infrared emission module can provide three levels of infrared pulse strength; the master control module is used for control according to the infrared pulse strength received by the infrared receiving module; the infraredemission module generally works at low-level strength; thus, the reliability of an infrared light emitting diode can be improved, and the service life of the infrared light emitting diode can be prolonged.
Description
technical field [0001] The invention relates to the field of infrared alarms, in particular to an active infrared anti-theft alarm. Background technique [0002] The existing active infrared alarm, because there are a lot of interference factors in the use environment, such as fog, rain, snow, etc., these factors will attenuate the infrared pulse signal. In order to overcome the false alarms that may be caused by these factors, the infrared emission The method of infrared pulse signal strength sent by the module makes the infrared pulse signal strength contain a large amount of design margin strength, and a large amount of design margin strength shortens the life of the infrared light-emitting diode. Contents of the invention [0003] The invention aims at the deficiencies of the prior art, and provides an active infrared anti-theft alarm with adjustable infrared pulse intensity. [0004] Technical scheme of the present invention is as follows: [0005] An active infrare...
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IPC IPC(8): G08B13/181
Inventor 池水莲周俊生刘友举杜景洪何凯涛
Owner SOUTH CHINA UNIV OF TECH