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Human body infrared ray receiving processing circuit

A technology for processing circuits and human body infrared, applied in electrical components, electronic switches, electrical program control and other directions, can solve the problems of complex circuits, low reliability, low sensitivity, etc., achieve simple circuit structure, reduce circuit processing parts, and improve information. The effect of noise ratio

Inactive Publication Date: 2010-10-20
LIVINGSTYLE ENTERPRISES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing human body infrared receiving and processing circuit filters the small electrical signal output by the human body infrared sensor PIR and amplifies it to a size that can be recognized by the logic level to control the output circuit. The analog signal is easily affected by temperature. And the circuit is complex, so there are disadvantages such as low signal-to-noise ratio, low reliability, low sensitivity, and inability to perform complex logic control.

Method used

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  • Human body infrared ray receiving processing circuit
  • Human body infrared ray receiving processing circuit
  • Human body infrared ray receiving processing circuit

Examples

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Embodiment 1

[0020] Embodiment one, see figure 1 with figure 2 As shown, the human body infrared receiving and processing circuit includes an amplifier circuit 1, a switch control circuit 5 for outputting switch signals, and a human body infrared sensor PIR for obtaining human body infrared signals, and it also includes a circuit for obtaining light brightness signals Photosensitive tube PHOT, which quantifies and digitally filters the infrared signal of the human body, and combines the light brightness signal and the switch signal to logically control the main controller IC1 that outputs high and low level signals, and the external output circuit that controls the working state according to the high and low level signals 4 .

[0021] The above-mentioned human body infrared receiving and processing circuit, its working principle is that the human body infrared sensor PIR adopts the human body infrared signal input mode with extremely low quiescent current, and then the tiny electrical si...

Embodiment 2

[0030] Embodiment 2 is different from Embodiment 1 in that the external output circuit 4 of the human body infrared receiving and processing circuit of the present invention is an anti-theft alarm driving circuit. At this time, the human body infrared receiving and processing circuit is used in the field of anti-theft alarm. Among them, the anti-theft alarm driving circuit can be designed according to actual product needs.

Embodiment 3

[0031] Embodiment 3 is different from Embodiment 1 in that the external output circuit 4 of the human body infrared receiving and processing circuit of the present invention is a temperature measurement driving circuit. At this time, the human body infrared receiving and processing circuit is used in the field of temperature measurement. Among them, the temperature measurement drive circuit can be designed according to actual product needs. Of course, the human body infrared receiving and processing circuit of the present invention can also be applied to other fields, and its external output circuit 4 can be designed accordingly.

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Abstract

The invention relates to the technical field of infrared ray receiving processing, in particular to a human body infrared ray receiving processing circuit, which comprises an amplification circuit, a switch control circuit, a human body infrared sensor PIR, a photosensitive tube PHOT, a main controller IC1 and an external output circuit, wherein the switch control circuit is used for outputting switch signals, the human body infrared sensor PIR is used for obtaining human body infrared signals, the photosensitive tube PHOT is used for obtaining light ray brightness signals, the main controller IC1 is used for carrying out A / D conversation and quantification digital wave filtering treatment on the human body infrared signals and carrying out logic control to output high-level and low-level signals through being combined with light ray brightness signals and switch signals, the external output circuit is used for controlling the work state according to the high-level and low-level signals, and the type of the main controller IC1 is SD7823. The human body infrared ray receiving processing circuit of the invention has the advantages of simple structure, high noise-signal ratio, high stability, high sensitivity and strong logic function.

Description

Technical field: [0001] The invention relates to the technical field of infrared ray receiving and processing, in particular to a human body infrared ray receiving and processing circuit. Background technique: [0002] In the prior art, the human body infrared receiving and processing circuit is a common infrared sensing control technology, which has been widely used in lighting, anti-theft alarm, temperature measurement and other fields. The human body infrared receiving and processing circuit generally includes a human body infrared sensor PIR (Passive Infrared Radiation), an operational amplifier, a controller and an output circuit. [0003] Among them, the working principle of the human body infrared sensor PIR is that its infrared sensing element is a pyroelectric substance. When the intensity of infrared radiation received by the human body changes, it loses the charge balance and starts to release current outward, thereby obtaining the human body emitted infrared sig...

Claims

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Application Information

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IPC IPC(8): H03K17/94G05B19/02
Inventor 李才进陈明允
Owner LIVINGSTYLE ENTERPRISES