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Infrared sensing device

An infrared induction and circuit technology, which is applied to instruments, anti-theft alarms, alarms, etc., can solve the problems of large capacitance changes, frequency failure, and receiving imbalance, and achieves the effects of high reliability, simple structure, and low price

Inactive Publication Date: 2015-06-03
CHENGDU JETCOM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this structure is simple in principle, due to changes in weather and temperature, the values ​​of inductance and capacitance will change, mainly due to large changes in capacitance, which will cause receiving imbalance, frequency failure, and the circuit will not make a sound when someone comes.

Method used

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  • Infrared sensing device

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Embodiment Construction

[0015] A kind of infrared induction device, it is characterized in that: comprise transmitter, receiver, infrared induction circuit, transmitter is RCM-1A transmitting module, receiver comprises RCM-1B receiving module, decimal counting frequency divider digital integrated circuit and thyristor switch VT circuit, the 2 pins of the RCM-lB receiving module are connected to the 15 pins of the CD4017 decimal counter through the diode VD1, the 2, 7, 1, 6, and 11 pins of the CD4017 decimal counter are all connected to the resistor R22 through the diode, and the resistor R22 is connected to the triode The base of VT, the triode VT is used as a switch between the back-end infrared sensing circuit and the power supply,

[0016] Infrared sensing circuit, including sequentially connected pyroelectric sensing probe, preamplifier circuit, comparison circuit and delay alarm circuit, said preamplifier circuit includes amplifier X1A and amplifier X2B,

[0017] The non-inverting input terminal...

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Abstract

The invention relates to the technical field of security protection, and provides an infrared sensing device. The infrared sensing device comprises a pyroelectric sensing probe, a pre-amplifying circuit, a comparing circuit and a delay alarming circuit which are sequentially connected, wherein the pre-amplifying circuit comprises an amplifier X1A and an amplifier X2B, the in-phase input end of the amplifier X1A is connected with a positive electrode of a power source through a resistor R3, and is connected with a negative electrode of the power source through a resistor R5, the resistor R3 and the resistor R5 form 1 / 2Vcc offset, the in-phase input end of the amplifier X1A is connected with the negative electrode of the power source through a damping capacitor C3, the in-phase input end of the amplifier X2B is connected with the positive electrode of the power source through a resistor R7, and is connected with the negative electrode of the power source through a resistor R8, the resistor R7 and the resistor R8 form 1 / 2Vcc offset, and the in-phase input end of the amplifier X2B is connected with the negative electrode of the power source through a damping capacitor C6.

Description

technical field [0001] The invention relates to the field of security technology and provides an infrared sensing device. Background technique [0002] In recent years, with the in-depth development of reform and opening up and the rapid development of electronic appliances, people's living standards have been greatly improved. Various high-end home appliances and valuables are owned by many families. However, there are more and more criminals. This point is to see that most people's anti-theft awareness is not strong enough. It is not uncommon to cause theft. Therefore, more and more resident families are very worried about property security. Anti-theft has just become an important topic. Infrared anti-theft alarm is an intelligent alarm system, which can greatly improve the safety of residents' families and effectively ensure the safety of residents' personal and property. Because infrared rays are invisible and have strong concealment and confidentiality, they have b...

Claims

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Application Information

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IPC IPC(8): G08B13/191
CPCG08B13/191
Inventor 李亮
Owner CHENGDU JETCOM TECH
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