Photoelectric signal collection conversion device for dust concentration sensor

Abstract

A photoelectric signal collection conversion device for a dust concentration sensor belongs to the technical field of measurement electron. The photoelectric signal collection conversion device comprises an I / V (current / voltage) conversion circuit for outputting a first output voltage Vout1, a voltage amplification circuit for outputting a second output voltage Vout2, a voltage following circuit for outputting a third output voltage Vout3 and a power supply input and signal output circuit, wherein the output end of the power supply input and signal output circuit is connected with the I / V conversion circuit, the voltage amplification circuit and the voltage following circuit, the output end of the I / V conversion circuit is connected with the voltage amplification circuit, the output end of the voltage amplification circuit is connected with the voltage following circuit, and the output end of the voltage following circuit is connected with the power supply input and signal output circuit. The photoelectric signal collection conversion device for the dust concentration sensor has advantages of good working stability, strong interference resistance, accuracy in data collection and the like.

Description

technical field [0001] The invention belongs to the technical field of measurement electronics, and relates to a photoelectric signal acquisition and conversion device for a dust concentration sensor, in particular to a photoelectric signal acquisition and conversion device for an optical dust concentration sensor. Background technique [0002] Underground coal mines have high dust content and harmful components. Workers who work in the dust environment for a long time are prone to pneumoconiosis; service life. The dust concentration sensor is a high-tech sensor developed by using the principle of laser scattering to meet the existing coal mine monitoring of underground dust concentration. The dust concentration sensor is mainly used in dust operation places such as mines and cement plants. It can continuously detect the concentration of floating dust in the environment where flammable, explosive and combustible gas mixtures exist. The underground monitoring shows the dust...

AI Technical Summary

Problems solved by technology

The underground environment of the coal mine is harsh, the light is very weak, the detection accuracy of ordinary photodiodes is poor, and the sensitivity is low. In addition, because the current signal collected is extremely small, it needs to be amplified by the amplifier circuit before it can be used by the lower circuit; and the photomultiplier tube has high sensitivity. It has low noise and cannot be irradiated by strong light. It is suitable for use in coal mines. It can convert weak light signals into electrical signals, but it needs to provide a higher voltage when used, which is likely to cause safety hazards in dusty workplaces. The cost is also higher

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