CN203148843U - Mine harmful gas detection device - Google Patents
Mine harmful gas detection device Download PDFInfo
- Publication number
- CN203148843U CN203148843U CN 201320157244 CN201320157244U CN203148843U CN 203148843 U CN203148843 U CN 203148843U CN 201320157244 CN201320157244 CN 201320157244 CN 201320157244 U CN201320157244 U CN 201320157244U CN 203148843 U CN203148843 U CN 203148843U
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- circuit
- harmful gas
- mine
- current source
- gas pick
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Abstract
The utility model discloses a mine harmful gas detection device which can predict gas explosion. The mine harmful gas detection device is characterized by comprising a singlechip, wherein the singlechip is connected with an analog/digital conversion circuit, an external clock circuit, a display control circuit and an alarm circuit; a transmitting module is connected with the analog/digital conversion circuit through a receiving module; the transmitting module is connected with a direct-current current source; the pulse current is connected with the transmitting module through a frequency division selection circuit; and the pulse current source is connected with the receiving module through a pulse width modulation circuit. The device is low in instrument cost and high in detection efficiency and can detect the harmful gases in the mine on line in real time, and the safety of mining operation is effectively improved.
Description
Technical field
The utility model relates to a kind of mine security pick-up unit, specifically relates to a kind of mine harmful gas pick-up unit.
Background technology
Industrial expansion needs a large amount of energy, and a large amount of energy the gas of higher concentration usually occurs from the exploitation to underground coal in the recovery process of coal, and therefore gas explosion also often take place, and causes bigger economic loss for country and individual.
Gas explosion is from its essence, the fierce oxidation reaction that produces under certain density exactly methane and the effect of air moderate.The condition of gas explosion is existence and the sufficient oxygen that possesses certain density gas, high temperature burning things which may cause a fire disaster.Gas explosion has certain concentration range, and we meet the concentration range that can set off an explosion behind the fire to gas in air and call gas explosion limits.Gas explosion limits is 5 ﹪～16 ﹪.When gas density is lower than 5 ﹪, meet fire and do not explode, but can be at the peripheral burning zone that forms of flame; When gas density is 9.5 ﹪, its brisance maximum (oxygen and gas complete reaction); Gas density loses its explosivity when 16 ﹪ are above, still can burn but meet fire in air.
Single-chip microcomputer is a kind of integrated circuit (IC) chip, be to adopt very large scale integration technology that central processor CPU random access memory ram, read only memory ROM, multiple I/O mouth and functions such as interrupt system, timer/timer (may also comprise circuit such as display driver circuit, pulse-width modulation circuit, analog multiplexer, A/D converter) with data-handling capacity are integrated into a little and perfect microcomputer system that constitutes on the silicon chip, in the widespread use of industrial control field.
NE555 is a high stability controller that can produce the accurate timing pulse, and its output driving current can reach 200mA.When the multivibrator working method, the pulse duty factor of its output is determined by two outer meeting resistances and an external capacitor; When the monostable working method, its delay time determines that by an outer meeting resistance and an external capacitor number microsecond of can delaying time is to a few hours.Operating voltage range is 4.5V≤Vcc≤16V.NE555 time base circuit packing forms has two kinds, the encapsulation of the one, DIP dual-in-line 8 pin, and another kind is SOP-8 small-sized (SMD) packing forms.Inner structure is all identical with principle of work.The pin function of 555 serial IC and to use all be compatible, just model different because of different its degree of stability of its price, power saving, producible oscillation frequency also not quite identical; And 555 be one and have many uses and quite general timing IC, only needs resistance and the electric capacity of minority, just can produce the pulse wave signal of the required various different frequencies of digit circuit.Utilize NE555 can form considerable application circuit, even reach hundreds of application circuits, introduction is all arranged in all kinds of books and periodicals, for example household electrical appliance control device, doorbell, alarm, signal generator, electric circuit inspection instrument, components and parts measuring instrument, timer, voltage-frequency change-over circuit, application of power circuit, automaton and other application circuit all have a wide range of applications, and this is because the cause that NE555 combines mimic channel and digital circuit dexterously.
Therefore develop a cover efficient ways and instrument and come the mine harmful gas is detected analysis, thereby the control content of harmful gas prevents that gas explosion from just seeming very necessary and urgent.
Summary of the invention
The purpose of this utility model provides a kind of mine harmful gas pick-up unit that can forecast gas explosion.
The utility model is to adopt following technical scheme to realize its goal of the invention, a kind of mine harmful gas pick-up unit, it comprises single-chip microcomputer, single-chip microcomputer is connected with mould/number conversion circuit, outer clock circuit, display control circuit, warning circuit, and transmitter module is connected with mould/number conversion circuit through receiver module; Described transmitter module is connected with DC current source; Pulse current source selects circuit to be connected with transmitter module through frequency division; Described pulse current source via pulse width modulation again is connected with receiver module.
The mosfet switching tube that transmitter module described in the utility model comprises infrared light supply, is connected with infrared light supply.
Receiver module described in the utility model comprises photoelectric switching circuit, biasing circuit, signal amplification circuit.
Photoelectric switching circuit described in the utility model has adopted infrared eye.
Infrared light supply described in the utility model has adopted middle infrarede emitting diode MIR-LED array.
The pulse of pulse current source described in the utility model produces has adopted the NE555 time base circuit.
Because adopt technique scheme, the utility model has been realized goal of the invention preferably, its instrument cost is low, can be to the online real-time detection of the harmful gas under the mine, detection efficiency height, the security that has effectively improved mine operation.
Description of drawings
Fig. 1 is structural principle schematic block diagram of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 1, a kind of mine harmful gas pick-up unit, it comprises single-chip microcomputer, and single-chip microcomputer is connected with mould/number conversion circuit, outer clock circuit, display control circuit, warning circuit, and transmitter module is connected with mould/number conversion circuit through receiver module; Described transmitter module is connected with DC current source; Pulse current source selects circuit to be connected with transmitter module through frequency division; Described pulse current source via pulse width modulation again is connected with receiver module.
Frequency division described in the utility model selects circuit to comprise forward direction binary addition counter MC14520, eight path analoging switch ADG608.
The mosfet switching tube that transmitter module described in the utility model comprises infrared light supply, is connected with infrared light supply.
Receiver module described in the utility model comprises photoelectric switching circuit, biasing circuit, signal amplification circuit.
Photoelectric switching circuit described in the utility model has adopted infrared eye.
Infrared light supply described in the utility model has adopted middle infrarede emitting diode MIR-LED array.
The pulse of pulse current source described in the utility model produces has adopted the NE555 time base circuit.
During the utility model work, DC current source is powered to transmitter module, switch mosfet management and control infrared light supply processed in the transmitter module passes test environment gas ruddiness outside receiver module sends by setting to be interrupted, photoelectric switching circuit during receiver module connects converts the light signal that receives to electric signal, sending into mould/number conversion circuit conversion then after biasing circuit, signal amplification circuit adjustment are amplified is digital signal, sends in the single-chip microcomputer and handles; Because the light absorbing wavelength that passes through test environment gas that infrared eye receives in the photoelectric switching circuit is different with emitted luminescence intensity, the data that last single-chip microcomputer extracts are also different, according to the numerical value of single-chip microcomputer being preset by display control circuit, single-chip microcomputer can judge whether to control warning circuit and carry out alarm; Outer clock circuit produces clock pulse signal and sends into single-chip microcomputer, to guarantee the synchronism of monolithic machine operation; The pulse that pulse current source sends is selected to control closing or closing of switch mosfet pipe after the circuit conditioning through frequency division; Simultaneously, send into receiver module after the pulse via pulse width modulation that pulse current source sends, make its synchronized transmissions module.
Claims (9)
1. a mine harmful gas pick-up unit is characterized in that it comprises single-chip microcomputer, and single-chip microcomputer is connected with mould/number conversion circuit, outer clock circuit, display control circuit, warning circuit, and transmitter module is connected with mould/number conversion circuit through receiver module; Described transmitter module is connected with DC current source; Pulse current source selects circuit to be connected with transmitter module through frequency division; Described pulse current source via pulse width modulation again is connected with receiver module.
2. mine harmful gas pick-up unit according to claim 1 is characterized in that the mosfet switching tube that described transmitter module comprises infrared light supply, is connected with infrared light supply.
3. mine harmful gas pick-up unit according to claim 1 is characterized in that described receiver module comprises photoelectric switching circuit, biasing circuit, signal amplification circuit.
4. mine harmful gas pick-up unit according to claim 2 is characterized in that described receiver module comprises photoelectric switching circuit, biasing circuit, signal amplification circuit.
5. mine harmful gas pick-up unit according to claim 3 is characterized in that described photoelectric switching circuit has adopted infrared eye.
6. mine harmful gas pick-up unit according to claim 4 is characterized in that described photoelectric switching circuit has adopted infrared eye.
7. according to claim 1 or 2 or 3 or 4 or 5 or 6 described mine harmful gas pick-up units, it is characterized in that described infrared light supply has adopted middle infrarede emitting diode MIR-LED array.
8. according to claim 1 or 2 or 3 or 4 or 5 or 6 described mine harmful gas pick-up units, it is characterized in that the NE555 time base circuit has been adopted in the pulse generation of described pulse current source.
9. mine harmful gas pick-up unit according to claim 7 is characterized in that the NE555 time base circuit has been adopted in the pulse generation of described pulse current source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320157244 CN203148843U (en) | 2013-04-01 | 2013-04-01 | Mine harmful gas detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320157244 CN203148843U (en) | 2013-04-01 | 2013-04-01 | Mine harmful gas detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203148843U true CN203148843U (en) | 2013-08-21 |
Family
ID=48976359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320157244 Expired - Fee Related CN203148843U (en) | 2013-04-01 | 2013-04-01 | Mine harmful gas detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203148843U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106370614A (en) * | 2016-08-15 | 2017-02-01 | 长春理工大学 | Multisectional infrared-band gas detection apparatus and method |
-
2013
- 2013-04-01 CN CN 201320157244 patent/CN203148843U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106370614A (en) * | 2016-08-15 | 2017-02-01 | 长春理工大学 | Multisectional infrared-band gas detection apparatus and method |
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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: 20130821 Termination date: 20140401 |