A new anti-interference infrared pair tube detection method

The infrared photodiode detection method, which uses power supply circuitry and time delay control, solves the problem of infrared photodiodes being susceptible to ambient light interference, and achieves a more stable sensing distance and accurate object detection.

CN116299767BActive Publication Date: 2026-07-14SHENZHEN JINGZHE TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHENZHEN JINGZHE TECH CO LTD
Filing Date
2022-12-27
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing infrared photodetector products are susceptible to ambient light interference, leading to unstable sensing distance, false triggering, or malfunction.

Method used

A novel anti-interference infrared photodiode detection method is adopted. The infrared transmitting and receiving circuits are powered by a power supply circuit. Combined with a specific time delay and signal detection steps, the stability of the infrared transmitting and receiving circuits is ensured. The infrared transmission time is adjusted when an object is detected and when no object is detected to form a sensing distance hysteresis and avoid false detection.

Benefits of technology

It effectively avoids interference from ambient light sources, improves the accuracy and stability of infrared photodetector detection, prevents the product from repeatedly operating at the critical point, and enhances the reliability of the sensing distance.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a novel anti-interference infrared pair tube detection method, which comprises a power supply circuit, an infrared emission circuit and an infrared receiving circuit. The power supply circuit stably supplies power to the infrared emission circuit and the infrared receiving circuit, so as to ensure that the sensing distance is not affected by voltage and use feeling is ensured. The infrared emission time for detecting an object is different from that for not detecting an object, and the infrared emission time for detecting an object is longer than that for not detecting an object. In this way, the sensing distance can be slightly lengthened, a return difference is formed, repeated false detection at a critical point is avoided, and the situation that a product repeatedly works when an object is placed on the critical point is avoided. The interval time of each detection after detecting an object is not the same, and generally has short and long intervals, so that the obvious change of the sensing distance caused by the frequency interference of the environmental light source can be effectively avoided. The detection filtering is multiple detection, so that the accuracy of product detection can be provided.
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