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Weak optoelectronic signal detection circuit

A photoelectric signal and detection circuit technology, applied in the field of weak signal detection, can solve problems such as complex design, and achieve high work efficiency, low power consumption, and stable work

Inactive Publication Date: 2018-05-29
李彦松
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, most of the detection principles at home and abroad are based on the principle of lock-in amplifiers to achieve detection, and the design is more complicated.

Method used

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  • Weak optoelectronic signal detection circuit

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with drawings and embodiments.

[0016] Such as figure 1 , the detection circuit plans to use the PIN photodiode (UT101) produced by Forty-Four, working under the reverse bias condition, the spectral response range is 400-1100 nm, the peak is around 900 nm, the noise is low, and the response is fast. In the detector circuit , The power supply and the power supply of the laser light source are independent of each other and do not affect each other. The detection detector is D1, the reference detector is D2, and the power supply uses LM317 three-terminal regulated power supply and Y1505S power supply module.

[0017] Such as figure 2 , The laser emitting circuit uses AC-DC to provide a DC voltage, and then uses the DC-DC power module to provide corresponding voltage support for different parts, which simplifies the power supply design, high reliability, small size, and isolation effect. The measuremen...

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Abstract

A weak optoelectronic signal detection circuit is suitable for the weak signal detection field, and comprises a detection circuit, a laser emission circuit, a difference amplification circuit and a filter circuit; the weak optoelectronic signal detection circuit simplifies the power supply, is high in reliability, small in size, and has an isolation effect; the circuit is compact in structure, small in size, stable in work, high in work efficiency, low in power consumption, and has an good interference immunity and reliability.

Description

technical field [0001] The invention relates to a weak photoelectric signal detection circuit, which is suitable for the field of weak signal detection. Background technique [0002] Weak signal detection technology is used in many fields, such as ocean detection, building stress testing and environmental monitoring, etc., but most of the useful signals are relatively weak and are submerged in the noise background, which requires the use of various sensors to detect these weak signals Detected and converted into physical quantities that are convenient for processing and analysis. The photoelectric detection technology has been widely used due to its characteristics of non-contact measurement, fast speed, large range and high precision. Photoelectric detection technology is to combine electronics and optics, detect optical signals through electronic devices or sensors, and then collect, store, transmit, process and display. In principle, some photosensitive elements are use...

Claims

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Application Information

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IPC IPC(8): G01D5/26
CPCG01D5/26
Inventor 李彦松
Owner 李彦松