A dual-channel detection-based photoelectric sensor particle detection device and apparatus

The photoelectric sensor particle detection device with dual-channel detection amplifies the signals of small and large particles by using high and low gain channels respectively, which solves the problem of limited sampling voltage range of ADC in the prior art and realizes effective detection in complex environments with large particle differences.

CN224303507UActive Publication Date: 2026-05-29MCVEILL (SHANGHAI) TECH CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
MCVEILL (SHANGHAI) TECH CO LTD
Filing Date
2025-07-22
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing photoelectric sensor particle detection devices are limited by the effective sampling voltage range of the ADC, and cannot take into account both large and small particle electrical signals, especially in complex environments with large particle differences, they cannot be effectively detected.

Method used

The photoelectric sensor particle detection device employs dual-channel detection. The sensor sampling circuit outputs a signal to the sampling signal distribution circuit, which distributes it to two channels with different gains. Each channel includes a signal gain circuit and an analog-to-digital converter circuit. The high-gain channel is used to amplify the signal of smaller particles, while the low-gain channel is used to amplify the signal of larger particles. Dual ADC sampling is used to accommodate the detection of electrical signals from different particles.

Benefits of technology

It enables effective detection of both larger and smaller particles in environments with significant particle differences, broadens the detection range, avoids signal loss, and is suitable for PM2.5/PM10 mixed aerosol scenarios with polydisperse particulate matter.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224303507U_ABST
    Figure CN224303507U_ABST
Patent Text Reader

Abstract

The utility model provides a kind of photoelectric sensor particle detection device and equipment based on double channel detection, it is related to optical particle detection technical field.The device sensor sampling circuit output end is connected with sampling signal distribution circuit input end;Sampling signal distribution circuit first output end is connected with first signal gain circuit input end, and second output end is connected with second signal gain circuit input end;First signal gain circuit output end is connected with first analog-digital conversion circuit input end;Second signal gain circuit output end is connected with second analog-digital conversion circuit input end;The gain coefficient of first signal gain circuit is greater than second signal gain circuit;The output end of first analog-digital conversion circuit and second analog-digital conversion circuit is connected with digital signal processing circuit.The utility model can make signal pass through different gain amplifier, double ADC sampling, make one way channel satisfy small particle measurement, another way satisfies large particle measurement, and the electrical signal of larger particle and smaller particle can be considered.
Need to check novelty before this filing date? Find Prior Art