CN2091457U - Intelligence light interference gas detecting instrument - Google Patents
Intelligence light interference gas detecting instrument Download PDFInfo
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- CN2091457U CN2091457U CN 91205283 CN91205283U CN2091457U CN 2091457 U CN2091457 U CN 2091457U CN 91205283 CN91205283 CN 91205283 CN 91205283 U CN91205283 U CN 91205283U CN 2091457 U CN2091457 U CN 2091457U
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- circuit
- chip microcomputer
- light
- intelligent gas
- light interference
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Abstract
The utility model relates to an intelligence light interference gas detecting instrument, comprising a light interference detecting device. The utility model is characterized in that the convergence exit end of the lens assembly of the light interference detecting device is connected with the light receiving end face of the photoelectric conversion device of the light interference detecting device; the voltage output end of the light interference detecting device is connected with a single-chip microcomputer system; the utility model utilizes a microcomputer to process signals to achieve the function of the intelligentization of the whole machine The utility model can display the concentration of harmful gas, such as methane, carbon dioxide, etc. in digital conveniently, visually and accurately, and can conduct an over-limitation acoustic-optical alarm according to the setting; the utility model can process, store and print the detected data to enhance the use effect of the intelligence light interference gas detecting instrument.
Description
The utility model relates to a kind of intelligent interference of light gas detection equipment.
Interference of light gas detection equipment is a kind of interference of light detecting device as shown in Figure 2, generally comprises light source L, parallel plane mirror H, standard null air chamber A, tested gas compartment B, right-angle prism G(or parallel plane mirror), right-angle prism F, lens combination E.Tested air chamber B and extraneous the communication.The light that light source L sends is divided into p, q two bundle light at the m of level crossing H point, and wherein Ray Of Light p travels to and fro between standard null air chamber A, and another bundle light q travels to and fro between tested gas compartment B.After structural design was determined, two bundle light had constant distance.If contain gas in the air of B chamber, then the light velocity changes, i.e. variations in refractive index.Under the certain situation of environment temperature, pressure, the proportional relation of the content of change of refractive and gas, the A chamber is different with the refractive index of B chamber, optical path difference just appears in two bundle light, two bundle light successively arrive the N point, are focused at together and produce at the N point and interfere, and form interference fringe.The amount of movement of interference fringe or width are with refractive index, and just the content of gas is corresponding, and the identification interference fringe information just can predict gas bearing capacity.Representative interference of light gas detector is the AQG-3 gas detector.This interference of light gas detection equipment stability, repeatability, precision are all higher, but the user of service can only pass through optical system interpretation with the naked eye and hand-kept data, thereby parallax error is bigger, and do not convert electric signal mechanism to and can not utilize computing machine to carry out data processing, storage and printout, directly influence detects effect.
The utility model purpose is above-mentioned interference of light gas detection equipment is improved, keep its good detection precision, stability and repeated, utilize opto-electronic conversion, MICROCOMPUTER PROCESSING technology, make it have functions such as automatic demonstration, warning, data storage, and be provided with the standard signal output interface.
For achieving the above object, technical solution of the present utility model is: at the convergence outgoing termination electrooptical device of the lens combination of existing interference of light detecting device, interference fringe information with the acquisition of interference of light detecting device, scioptics project on the light-receiving end face of photoelectric device, convert optical information to electric signal, then this electric signal input is had the single-chip microprocessor system of A/D translation interface, utilize microcomputer to carry out signal Processing, realize the complete machine intelligent functions.And is setting up standard signaling interface according to actual needs, parts such as demonstration automatically, sound, light warning, printout mouth.
This intelligent interference of light gas detector comprises known interference of light gas detecting device, it is characterized in that the convergence exit end of lens combination of interference of light pick-up unit and the light-receiving end face of electrooptical device join, the optical information of the interference field that the lens combination projection is next changes electric signal into, the electric output terminal of electrooptical device is connected with a single-chip microprocessor system, this single-chip microprocessor system comprises: (1) pre-amplification circuit, the electric output terminal of electrooptical device and the input end of pre-amplification circuit are connected, the output electric signal of electrooptical device is amplified, to be fit to the requirement of subsequent conditioning circuit; (2) A/D converter, the output terminal of pre-amplification circuit is connected with the analog input end of A/D converter, and the analog voltage signal that preposition amplifier section is sent here is transformed into the digital quantity that is suitable for Computer Processing; (3) single chip microcomputer, the digital output end of A/D converter is suspended on the microcontroller bus by impact damper; (4) keyboard, the bond number of keyboard is according to function setting; (5) one or more combinations of following functional circuit: (5.1) sound alarm circuit, this circuit control input end is connected with single-chip microcomputer, (5.2) optical alarm circuit, this circuit control input end is connected with single-chip microcomputer, (5.3) LCD, this LCD is connected with single-chip microcomputer by display interface circuit, and (5.4) standard signal interface circuit directly is connected with single-chip microcomputer.
Because above-mentioned solution connects electrooptical device and single-chip microprocessor system at the convergence exit end of the lens combination of existing interference of light gas detecting device, can be very easily with the concentration of harmful gas such as methane, carbon dioxide in the mine intuitively, show And with numeral exactly and can also the relevant data of at every turn testing (time, place, concentration etc.) can be handled, store and print according to the setting sound and light alarm that transfinites.Both keep the inherent characteristics of interference of light pick-up unit, improved result of use again.This instrument is the coal mine production safety detecting instrument, also can be used for laboratory and other industrial sector the concentration of methane, carbon dioxide or other gas carried out high-precision measuring, and be the stronger gas detection equipment of a kind of practicality.
Below in conjunction with embodiment and accompanying drawing thereof the utility model is described in further detail.
Fig. 1 is an embodiment complete machine block scheme.
Fig. 2 is a kind of fundamental diagram of known interference of light detecting device.
Fig. 3 is the embodiment circuit theory diagrams.
According to Fig. 3 embodiment circuit theory diagrams, each several part function and interconnected relationship are made following brief description:
The effect of interference of light detecting device is that the concentration with tested gas changes interference of light field into.Fig. 2 represents the course of work that this interference of light detects, and structurally perhaps have the unsubstantiality change certainly, but the course of work and principle all is known technology, are not further elaborated here.The optical information scioptics group of interference of light field is assembled and is projected on the light-receiving end face of electrooptical device.
Electrooptical device is to change the optical information that the lens combination projection comes into electric signal.The convergence exit end of lens combination is connected with the light-receiving end face of electrooptical device.According to the needs of information processing, adopt dissimilar electrooptical devices.For example silicon photoelectric position detector (PSD), Light Coupled Device (CCD), photoresistance (CaS etc.), photovoltage switching device (claiming photovoltaic device, photodetector again) or the like.Present embodiment adopts the PSD position sensor, changes optical information into I
1, I
2Current signal.According to the type of used photoelectric device, select different biasings or driving circuit for use.Adopt the CCD device, then will join driving pulse (or claiming time clock) circuit; Adopt photoresistance, then want the configuration voltages circuit.Present embodiment adopts the PSD position sensor, does not then need configuration biasing or driving circuit.
Pre-amplification circuit is that the voltage signal that electrooptical device is exported is amplified, and adapts to the requirement of subsequent conditioning circuit.Present embodiment adopts the PSD position sensor to be output as two-way (I
1, I
2) current signal relevant with optical information, so dispose two I/V converter amplifier circuits respectively, give A/D converter respectively by sampling switch (CD4066) then.
A/D converter is to change the analog voltage signal that preposition amplifier section is sent here into be suitable for Computer Processing digital quantity.Present embodiment adopts three half module number conversions of 5G14433 circuit.
Present embodiment adopts the 80C31 single-chip microcomputer to make the master control unit of instrument, with 27C32(4K * 8) EPROM makes the external program memory, with 6116(2K * 8) static RAM (SRAM) makes the external data memory, adds that functional circuit such as A/D converter, demonstration and keyboard constitute single-chip microprocessor system.Multi channel selecting pulse output end (the DS of three and half A/D converters (5G14433)
4, DS
3, DS
2, DS
1), BCD output terminal (Q
3, Q
2, Q
1, Q
0) and the keyboard alignment be suspended to single-chip microcomputer (80C31) bus (P by eight impact dampers (HC244-1, HC244-2) respectively
0.0-7) on.The real-time demonstration control end Du of 5G14433 is connected with the INTO mouth of 80C31 with EOC mark output end EOC.The sheet of HC244-1 selects 1 G, 2 G to link to each other with the output terminal of rejection gate, this or two non-input ends connect RD pin and the address wire of 80C31 respectively, four lines of keyboard (by the anode of diode, Fig. 3 part omitted) are respectively linked address wire.Everybody pen section pin of 6 LCD (6N17BF) respectively with the output pin Q of 68 bit shift register CH164
H, Q
G, Q
F, Q
E, Q
D, Q
C, Q
BConnect the Q of CH164-1 and CH164-3
AOutput pin meets common port (COM) pin and the tertiary radix point (h of LCD of LCD respectively
3) leading foot.The output pin Q of CH164 at different levels
HSerial input pin (B) with back one-level CH164 connects.Clock input pin (CK) at different levels is all received (TXD) end of 80C31.The serial input pin (B) of CH164-1 is received the RXD end of 80C31.When the concentration of tested gas is converted to interference of light field, microcomputer is delivered in interference of light field after opto-electronic conversion, preposition amplification and A/D conversion, microcomputer is carried out preset program, carry out that automatic range is selected, the compensation of environmental impact amount, digital filtering be converted into gas bearing capacity with corresponding proportion, and decoding and drive to show the setting value guide sound optical alarm circuit of ， And according to keyboard.Simultaneously, microcomputer also send tested gas amount data memory to preserve according to detection time, place (code) of keyboard to set up successively, as required, can these data be accessed by keyboard send printer output or send 4-20mA(or 0-10mA by standard signal interface) standard signal uses for the ground central control device.
Sound, optical alarm circuit adopt conventional sound, optical circuit, and when gas bearing capacity transfinited, circuit was promptly worked, or sounding or flash of light.Among Fig. 3, sound alarm circuit is by sound integrated circuit (CW9300) and power discharging transistor T
4Form with loudspeaker, optical alarm circuit is made up of light emitting diode LD and oscillatory circuit, and its operating voltage is passed through switch transistor T by power supply
3Supply with switch transistor T
3Base stage and interface microcontroller P
10Connect, as single-chip microcomputer P
10During output low level, sound, optical circuit work.
In order to reduce the power consumption of complete machine off working state, embodiment is provided with a power control circuit, and this embodiment circuit is by triode T
0, T
1, T
2And Resistor-Capacitor Unit forms, in order to control A/D and D/A(0832) power supply of change-over circuit, this circuit and single-chip microcomputer (80C31) control port P
17Connect.As control end P
17During output low level, the power control circuit conducting, A/D and D/A change-over circuit are powered, otherwise then stop power supply, thereby reduce the complete machine power consumption.
This machine also is provided with a printer output interface (WP
2), so that external corresponding printer makes printing such as data such as time, place, concentration in the machine of being stored in, this interface is connected with single-chip microcomputer.
Claims (8)
1, a kind of intelligent gas detector, comprise interference of light gas detecting device, it is characterized in that the convergence exit end of lens combination of interference of light pick-up unit and the light-receiving end face of electrooptical device join, the voltage output end of electrooptical device connects single-chip microprocessor system, and this single-chip microprocessor system comprises:
(1), pre-amplification circuit, the voltage output end of electrooptical device is connected with the input end of pre-amplification circuit,
(2), A/D converter, the output terminal of pre-amplification circuit is connected with the analog input end of A/D converter,
(3), single chip microcomputer, the digital output end of A/D converter is suspended on the microcontroller bus by impact damper,
(4), keyboard,
(5), one or more combinations of following functional circuit:
(5.1), sound alarm circuit, its control input end is connected with single-chip microcomputer,
(5.2), optical alarm circuit, its control input end is connected with single-chip microcomputer,
(5.3), LCD, be connected with single-chip microcomputer by display interface circuit,
(5.4), standard signal interface, directly be connected with single-chip microcomputer.
2, intelligent gas detector according to claim 1, it is characterized in that electrooptical device is silicon photoelectric position detector (PSD) or Light Coupled Device (CCD) or photoresistance or photovoltage switching device, for the CCD device, then dispose the respective drive pulsing circuit, for photoresistance, then dispose the relevant voltage circuit, for the PSD position sensor, it is output as the two-way current signal, dispose two I/V converter amplifier circuits respectively, (LD4066) gives A/D converter respectively by sampling switch.
3, intelligent gas detector according to claim 1 and 2 is characterized in that being provided with the printer output interface, and this interface is connected with single-chip microcomputer (80C31).
4, intelligent gas detector according to claim 1 and 2 is characterized in that being provided with the power control circuit in order to control A/D and the power supply of D/A change-over circuit, this circuit and Single-chip Controlling port (P
17) connect.
5, intelligent gas detector according to claim 3 is characterized in that being provided with the power control circuit in order to control A/D and the power supply of D/A change-over circuit, this circuit and Single-chip Controlling port (P
17) connect.
6, according to claim 1 or 2 or 5 described intelligent gas detectors, the master control unit that it is characterized in that single chip microcomputer is the 80C31 single-chip microcomputer, with 27C32(4K * 8) EPROM makes the external program memory, with 6116(2K * 8) static RAM (SRAM) makes the external data memory.
7, intelligent gas detector according to claim 3, the master control unit that it is characterized in that single chip microcomputer is the 80C31 single-chip microcomputer, with 27C32(4K * 8) EPROM makes the external program memory, with 6116(2K * 8) static RAM (SRAM) makes the external data memory.
8, intelligent gas detector according to claim 4, the master control unit that it is characterized in that single chip microcomputer is the 80C31 single-chip microcomputer, with 27C32(4K * 8) EPROM makes the external program memory, with 6116(2K * 8) static RAM (SRAM) makes the external data memory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91205283 CN2091457U (en) | 1991-03-30 | 1991-03-30 | Intelligence light interference gas detecting instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91205283 CN2091457U (en) | 1991-03-30 | 1991-03-30 | Intelligence light interference gas detecting instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2091457U true CN2091457U (en) | 1991-12-25 |
Family
ID=4915183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91205283 Withdrawn CN2091457U (en) | 1991-03-30 | 1991-03-30 | Intelligence light interference gas detecting instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2091457U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100447554C (en) * | 2005-07-12 | 2008-12-31 | 吉林大学 | Detecting method and device for methane concentration |
| CN101782507A (en) * | 2010-03-03 | 2010-07-21 | 煤炭科学研究总院沈阳研究院 | Spectral analyzing method of underground polar mixed gas in coal mine |
| CN101776596B (en) * | 2010-02-03 | 2011-08-17 | 中北大学 | Gas density intelligent test system and method |
| CN102721667A (en) * | 2012-06-29 | 2012-10-10 | 中国科学院自动化研究所 | Optical interference type intelligent gas sensor |
| CN102998282A (en) * | 2012-12-21 | 2013-03-27 | 河南汉威电子股份有限公司 | Open circuit laser methane gas detection system |
| CN104062401A (en) * | 2013-11-06 | 2014-09-24 | 苏州天趣信息科技有限公司 | Warning device |
-
1991
- 1991-03-30 CN CN 91205283 patent/CN2091457U/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100447554C (en) * | 2005-07-12 | 2008-12-31 | 吉林大学 | Detecting method and device for methane concentration |
| CN101776596B (en) * | 2010-02-03 | 2011-08-17 | 中北大学 | Gas density intelligent test system and method |
| CN101782507A (en) * | 2010-03-03 | 2010-07-21 | 煤炭科学研究总院沈阳研究院 | Spectral analyzing method of underground polar mixed gas in coal mine |
| CN102721667A (en) * | 2012-06-29 | 2012-10-10 | 中国科学院自动化研究所 | Optical interference type intelligent gas sensor |
| CN102721667B (en) * | 2012-06-29 | 2014-07-16 | 中国科学院自动化研究所 | Optical interference type intelligent gas sensor |
| CN102998282A (en) * | 2012-12-21 | 2013-03-27 | 河南汉威电子股份有限公司 | Open circuit laser methane gas detection system |
| CN104062401A (en) * | 2013-11-06 | 2014-09-24 | 苏州天趣信息科技有限公司 | Warning device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |