Optoelectronic signal acquisition and conversion device for optical sensor used for detecting dust concentration
A dust concentration detection and photoelectric signal technology, applied in the field of measurement electronics, can solve the problems of low sensitivity, low noise, weak light, etc., and achieve the effects of good work stability, strong anti-interference ability, and accurate data collection.
Active Publication Date: 2014-05-14
常熟市德虞矿山机电有限公司
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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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[0012] In order to enable the examiners of the patent office, especially the public, to understand the technical essence and beneficial effects of the present invention more clearly, the applicant will describe in detail below in conjunction with the accompanying drawings in the form of embodiments, but none of the descriptions of the embodiments is a description of the present invention. Restriction of the inventive solution, any equivalent transformation made according to the concept of the present invention which is only in form but not in substance shall be regarded as the scope of the technical solution of the present invention.
[0013] see figure 1 , a photoelectric signal acquisition and conversion device for a dust concentration sensor, comprising an I / V conversion circuit 1, a voltage amplification circuit 2, a voltage follower circuit 3, and a power introduction and signal output circuit 4, the power introduction and signal output circuit 4 Supply the DC power ...
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The invention provides an optoelectronic signal acquisition and conversion device for an optical sensor used for detecting dust concentration, which belongs to the technical field of measuring electronics. The optoelectronic signal acquisition and conversion device comprises an I / V conversion circuit used for outputting a first output voltage, a voltage amplifier circuit used for outputting a second output voltage, a voltage follower circuit used for outputting a third output voltage and a power lead-in and signal output circuit, wherein the output terminal of the power lead-in and signal output circuit is connected with the I / V conversion circuit, the voltage amplifier circuit and the voltage follower circuit, the output terminal of the I / V conversion circuit is connected with the voltage amplifier circuit, the output terminal of the voltage amplifier circuit is connected with the voltage follower circuit, the output terminal of the voltage follower circuit is connected with the power lead-in and signal output circuit, and the I / V conversion circuit comprises a silicon photocell D1, resistors R2, R3 and R5, capacitors C1 to C3 and C8 and an operational amplifier U1 with an extreme low bias current. The optoelectronic signal acquisition and conversion device has the advantages of good working stability, strong anti-interference ability, accurate acquisition data, good reliability, etc.
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 an optical sensor used for dust concentration detection, 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 undergrou...
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IPC IPC(8): G01N15/06
Inventor 王雪华陈小峰陈新锋
Owner 常熟市德虞矿山机电有限公司