CN203053827U - Dust concentration sensor circuit for coal mine dust detection - Google Patents
Dust concentration sensor circuit for coal mine dust detection Download PDFInfo
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- CN203053827U CN203053827U CN 201320040814 CN201320040814U CN203053827U CN 203053827 U CN203053827 U CN 203053827U CN 201320040814 CN201320040814 CN 201320040814 CN 201320040814 U CN201320040814 U CN 201320040814U CN 203053827 U CN203053827 U CN 203053827U
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- sensing probe
- coal mine
- concentration sensor
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Abstract
The utility model discloses a dust concentration sensor circuit for coal mine dust detection, which relates to the technical field of electronic information. The dust concentration sensor circuit for coal mine dust detection comprises a sensing probe for acquiring dust-containing gas, the sensing probe is connected to a photoelectric integral circuit through a photomultiplier tube, the photoelectric integral circuit is connected to a frequency signal output circuit and a display circuit through a switching circuit, the photomultiplier tube converts signals of the sensing probe into optical signals, and then the optical signals are converted into electrical signals directly proportional to scattered light through the photoelectric integral circuit, the electrical signals are then converted into frequency signals for outputting through the switching circuit, and after the frequency signals are calculated, the mass concentration of dust is obtained and displayed; and the sensor circuit also comprises an intrinsic safe power supply, the intrinsic safe power supply is connected to a high-voltage generating circuit through a 5VDC voltage stabilizing circuit, and the high-voltage generating circuit is connected to the photomultiplier tube and the photoelectric integral circuit and supplies power for the photomultiplier tube and the photoelectric integral circuit. The dust concentration sensor circuit for coal mine dust detection disclosed by the utility model can adapt to bad environments in coal mines, is reasonable in whole circuit module design and stable in running, and has extremely high sensitivity.
Description
Technical field
The utility model relates to electronic information technical field, is specifically related to a kind of Mine Dust detection sensor of dust concentration circuit.
Background technology
Coal is the main energy sources of China, occupies an important position in the national economy energy structure, accounts for more than 76% in China's primary energy consumption.Along with fast development of national economy, the demand of coal is increasing, and in recent years, raw coal output increased rapidly, and only national raw coal output in 2007 has just surpassed 2,000,000,000 tons.Along with production-scale expansion, the pollution caused by coal dust situation is also more and more serious.
Coal dust belongs to dust, result from coal exploitation, store up, link such as transportation and processing and utilization, one of primary pollution source of the fabrication process place gas phase factor.With regard to the industry of colliery, in coal production process, nearly all operation all can produce dust.Along with the increasing of coal production mechanization degree and improving constantly of coal mining intensity, the coal dust generation of each job steps such as rock drilling, explosion, loading and unloading, fragmentation, transportation is rolling up.Under the situation of no dust prevention, the dust concentration of blast mining face can reach 300-500mg/m
3, the dust concentration of machine mining face can reach 1000-3000mg/m
3, the dust concentration of fully-mechanized mining working can reach 4000-8000mg/m
3The environment in severe contamination operation place, the harm worker is healthy, the influence safety in production.
In China, pneumoconiosis is one of main occupational illness.Along with the quickening of the paces of reforming and opening up to the outside world in recent years, economic fast development, society is to the increase of the energy and industrial and mining products demand, and the influence that the dust disaster produces progressively enlarges.And coal dust has explosivity, is suspended in aerial and reaches finite concentration, if at this moment there is the thermal source of the coal dust that can ignite that coal dust explosion will take place.The coal dust explosion meeting takes place such as the same serious accident of the especially big gas explosion in colliery.For the colliery, the consequence of coal dust explosion is more serious than gas explosion, and the former will produce a large amount of choke damp carbon dioxide and toxic atmospheric CO, causes the miner to poison or death; The latter mainly produces water vapor and carbon dioxide.Therefore the monitoring for Mine Dust seems particularly important, has relatively high expectations for the sensor that detects usefulness especially.
The utility model content
It is a kind of simple in structure that technical problem to be solved in the utility model is to provide, and futuramic Mine Dust detects uses the sensor of dust concentration circuit.
Technical problem to be solved in the utility model realizes by the following technical solutions:
A kind of Mine Dust detects uses the sensor of dust concentration circuit, comprise for the sensing probe of gathering dusty gas, described sensing probe is connected to the photoelectric integration circuit through photomultiplier, described photoelectric integration circuit is connected to frequency signal output circuit and display circuit through change-over circuit, photomultiplier converts the signal of sensing probe to light signal, convert the electric signal that is directly proportional with scattered light to through the photocurrent integrating circuit again, it is that the frequency signal of 200-1000Hz is exported that this electric signal is transformed to frequency by change-over circuit again, the mass concentration that draws simultaneously dust after as calculated shows, sensor circuit also comprises intrinsic safety electric source, described intrinsic safety electric source connects high-pressure generating circuit through the 5VDC mu balanced circuit, and described high-pressure generating circuit is connected to photomultiplier and the photocurrent integrating circuit provides power supply for it.
Described change-over circuit comprises an A/D converter.
The beneficial effects of the utility model are: the utility model can be adapted to the rugged surroundings in the colliery, and the integrated circuit reasonable module design is stable, has very high sensitivity.
Description of drawings
Fig. 1 is the utility model schematic block circuit diagram.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1, a kind of Mine Dust detects uses the sensor of dust concentration circuit, comprise for the sensing probe of gathering dusty gas, sensing probe is connected to the photoelectric integration circuit through photomultiplier, the photoelectric integration circuit is connected to frequency signal output circuit and display circuit through change-over circuit, photomultiplier converts the signal of sensing probe to light signal, convert the electric signal that is directly proportional with scattered light to through the photocurrent integrating circuit again, it is that the frequency signal of 200-1000Hz is exported that this electric signal is transformed to frequency by change-over circuit again, the mass concentration that draws simultaneously dust after as calculated shows, sensor circuit also comprises intrinsic safety electric source, intrinsic safety electric source connects high-pressure generating circuit through the 5VDC mu balanced circuit, high-pressure generating circuit is connected to photomultiplier and the photocurrent integrating circuit provides power supply for it, and change-over circuit comprises an A/D converter.
The sensing probe extraneous air enters under the attraction of fan and attracts mouth, enters the detecting device darkroom through guiding device (covering extraneous light).Directional light in the darkroom meets at right angles to intersect with the visual field of light accepting part and constitutes the sensitive volume, when dust passes through the sensitive volume, its 90 ℃ of direction scattered lights inject photomultiplier through slit and convert photocurrent to, convert the electric signal that is directly proportional with scattered light to through the photocurrent integrating circuit.This electric signal is transformed to the frequency signal that frequency is 200-1000Hz by amplifying circuit and A/D change-over circuit again, draws the mass concentration of dust simultaneously after software calculates.
More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the instructions just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (2)
1. a Mine Dust detects and uses the sensor of dust concentration circuit, it is characterized in that: comprise for the sensing probe of gathering dusty gas, described sensing probe is connected to the photoelectric integration circuit through photomultiplier, described photoelectric integration circuit is connected to frequency signal output circuit and display circuit through change-over circuit, photomultiplier converts the signal of sensing probe to light signal, convert the electric signal that is directly proportional with scattered light to through the photocurrent integrating circuit again, it is that the frequency signal of 200-1000Hz is exported that this electric signal is transformed to frequency by change-over circuit again, the mass concentration that draws simultaneously dust after as calculated shows, sensor circuit also comprises intrinsic safety electric source, described intrinsic safety electric source connects high-pressure generating circuit through the 5VDC mu balanced circuit, and described high-pressure generating circuit is connected to photomultiplier and the photocurrent integrating circuit provides power supply for it.
2. Mine Dust according to claim 1 detects and uses the sensor of dust concentration circuit, and it is characterized in that: described change-over circuit comprises an A/D converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320040814 CN203053827U (en) | 2013-01-24 | 2013-01-24 | Dust concentration sensor circuit for coal mine dust detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320040814 CN203053827U (en) | 2013-01-24 | 2013-01-24 | Dust concentration sensor circuit for coal mine dust detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203053827U true CN203053827U (en) | 2013-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320040814 Expired - Fee Related CN203053827U (en) | 2013-01-24 | 2013-01-24 | Dust concentration sensor circuit for coal mine dust detection |
Country Status (1)
| Country | Link |
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| CN (1) | CN203053827U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107608276A (en) * | 2017-10-25 | 2018-01-19 | 安徽华创环保设备科技有限公司 | A kind of workshop dust inspection and control system |
-
2013
- 2013-01-24 CN CN 201320040814 patent/CN203053827U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107608276A (en) * | 2017-10-25 | 2018-01-19 | 安徽华创环保设备科技有限公司 | A kind of workshop dust inspection and control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20140124 |