CN2847297Y - Single gas detector using infrared light source based on optoacoustic principle - Google Patents
Single gas detector using infrared light source based on optoacoustic principle Download PDFInfo
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- CN2847297Y CN2847297Y CN 200520047846 CN200520047846U CN2847297Y CN 2847297 Y CN2847297 Y CN 2847297Y CN 200520047846 CN200520047846 CN 200520047846 CN 200520047846 U CN200520047846 U CN 200520047846U CN 2847297 Y CN2847297 Y CN 2847297Y
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Abstract
The utility model relates to the field of the light and sound spectroscopy gas analysis, particularly a single gas detector using an infrared light source based on the light and sound principle and is composed of the infrared light source, a chopper, a light filtering piece, a light and sound pool, microphones, an infrared detector, a device power supply, a control device, a gas collecting pump and a quality flow meter, wherein the chopper is fixed on a base seat. The light filtering piece is fixed in a light filtering piece inserted groove, and an inner wall of the light and sound pool is a cylindrical gold plating pipe of the light and sound pool. The number of the microphones is two, and the microphones are respectively fixed on the center of the gold plating pipe of the light and sound pool. The device power supply is composed of an amplifier, a controller power supply, an executor power supply and a light source power supply, and the control device is connected with a data collector and is composed of an electromagnetic valve controller, a gas collecting pump controller and a quality flow meter controller. The amplifiers are respectively fixed at the upper end of the light and sound pool and on one side of the infrared detector, and a gas inlet hole and a gas outlet hole of the light and sound pool are respectively connected with battery valves. One end of the gas collecting pump is connected with an electromagnetic valve, and the other end of the gas collecting pump is connected with the quality flow meter. The utility model adopts the infrared light source and has the advantages of strong pertinence, high reliability, compact structure, rapid time response, capability of continuously measuring, etc. The utility model can respectively and early alarm the fire disaster and rapidly and accurately detect micro toxic and harmful leaked gas and combustible gas.
Description
Technical field
The utility model belongs to optoacoustic spectroscopy gas analysis field, is specifically related to a kind of pure gas pick-up unit that adopts infrared light supply based on photoacoustic principle.
Background technology
Aspect detection, alarm technique, because various solid combustibles mostly are organism, commitment in the fire generation, can produce gases such as CO, fire does not have the thermal current disturbance in early days simultaneously, gases such as CO can be followed Brownian movement and freely spread in air, and can pass indoor thermodynamic barrier, the roof space, hole, crack between a door and its frame etc., and existing early fire detection device-ion, optical detector of fire smoke find that smoldering fire is slow.Utilize that the gas sensor element of these element manufacturing has easy poisoning, poor stability, the life-span is short and use shortcoming such as inconvenience, therefore seeking a kind of gas fire detectors such as CO that utilize principle such as optoacoustic to make is those skilled in the art's goal in research.
Summary of the invention
The purpose of this utility model be to provide a kind of simple in structure, compact, volume is little, highly sensitive, reliability is high, with strong points, can be portable adopt the pure gas pick-up unit of infrared light supply based on photoacoustic principle.
A kind of pure gas pick-up unit that adopts infrared light supply based on photoacoustic principle that the utility model proposes, mainly form by infrared light supply 1, chopper 23, optical filter 4, photoacoustic cell 5, microphone 6, infrared eye 7, device power supply 8, control device 9, pedestal 10, gas production pump 13, mass flowmeter 21, it is characterized in that chopper (34) is made up of chopper column 2 and chopper impeller 3, chopper impeller 3 is fixed on the chopper column 2, and chopper column 2 is fixed on the pedestal 10; Optical filter 4 is fixed in the optical filter slot 28; Photoacoustic cell 6 middle parts are hollow, and inwall is the gold-plated pipe 24 of photoacoustic cell, and is cylindrical; Microphone 6 is two, is individually fixed in the central authorities of the gold-plated pipe 24 of photoacoustic cell; Device power supply 8 is fixed on the pedestal 10, is made up of amplifier 14, controller power source 15, actuator power supply 16 and light source power 17; Control device 9 is fixed on the pedestal, connects data acquisition unit 22; Form by solenoid valve controller 18, gas production pump controller 19, mass flowmeter controller 20; Amplifier 14 is two, a upper end of being fixed in photoacoustic cell 5, and another amplifier 14 is fixed in infrared eye 7 one sides; Photoacoustic cell 5 peripheries are provided with air admission hole 25, venthole 26; Battery valve 12 is two, connects air admission hole 25, the venthole 26 of photoacoustic cell 5 respectively; One end of gas production pump 13 connects solenoid valve 12, other end quality of connection flowmeter 21; Light source 1 is aimed at the light inlet of chopper 23, and the light-emitting window of chopper 23 is aimed at the optical filter 4 in the optical filter slot 28, and optical filter 4 is aimed at the light inlet of photoacoustic cell 5, and the light-emitting window of photoacoustic cell 5 is aimed at infrared eye 8.
In the utility model, controller power source 15 connects amplifier 14, solenoid valve controller 18, gas production pump controller 19, mass flowmeter controller 20 respectively; Actuator power supply 16 connects solenoid valve 12; Light source power 17 connects light source 1.
In the utility model, the solenoid valve controller 18 in the control device 9 connects solenoid valve 12, and gas production pump controller 19 connects gas production pump 13, mass flowmeter controller 20 quality of connection flowmeters 21.
In the utility model, case 27 links to each other with pedestal 10 by bolt.
In the utility model, case 27 bottoms are provided with damping plastic mattress pin 11.
In the utility model, photoacoustic cell 4 inner structures have specific (special) requirements, and its outside photoacoustic cell body adopts aluminum, considers that mainly thermal conductivity is good, in light weight.Inside is that the gold-plated pipe of photoacoustic cell adopts brass material, and its inwall adopts cylindrical structural, and gold-plated through polishing, the gordian technique that inside dimension is designed to this photoacoustic cell 4 has specific (special) requirements, as detect CO gas, and it is 14mm that the gold-plated pipe of photoacoustic cell is selected diameter for use, long is the cylindrical of 50mm.The gold-plated inside pipe wall of photoacoustic cell central authorities have respectively placed a high precision microphone 6 up and down simultaneously.The gold-plated pipe size of the photoacoustic cell difference of different optical filter 4 correspondences.
In the utility model, infrared light supply 1 adopts the Infrared High-Power heat radiation light source, and makes infrared light can be good at focusing on to pass optical filter by ellipsoidal mirror and enter photoacoustic cell 4.Tested gas absorption laser emission energy in the photoacoustic cell 4 and produce pressure wave convert electric signal to by microphone 6, calculate corresponding gas concentration by computer again.
The utility model adopts single kind gas-detecting device, but this device is inner general optical filter slot is housed, as long as just can realize respectively multiple gases being measured by changing different optical filter 4.The optical filter impeller of comparing selects the optical filter slot apparatus pointed strong, and highly sensitive, noise is little, and Measuring Time is short, advantages of simple structure and simple.
Two states is arranged during the utility model work: initiatively gas production and passive gas production, can utilize the gas production pump in the infrared light supply optoacoustic spectroscopy pure gas pick-up unit initiatively to gather gaseous sample by external air collecting pipe when the atmosphere gas sample is detected; Close the gas production pump when barotropic gas sample is detected and to realize passive gas production, and can utilize mass rate control meter to realize the control of flow velocity and component ratio.The process of gas concentration measurement is: the device opening initialization comprises the lock-in amplifier initialization, preliminary works such as infrared light supply preheating.Infrared light supply enters the light inlet of chopper 23, the light-emitting window of chopper 23 is aimed at optical filter 4, the light source that comes out from optical filter 4 enters photoacoustic cell 5, tested gas absorption laser emission energy in the photoacoustic cell 5 and produce pressure wave, convert electric signal to by microphone 6, calculate corresponding gas concentration by computer again.The computer expert crosses program or operational order, control air inlet/give vent to anger solenoid valve and gas collecting pump collection gas, and gas is by the collection of gas production pump, enter solenoid valve, then gas enters photoacoustic cell, sounds because the vibration of gas drives microphone, carries out closing when optoacoustic is measured gas check valve.With calibrating gas device is demarcated if desired, can be come the charge flow rate and the proportioning of pilot-gas, thereby can come caliberating device by computing machine-AD/DA data acquisition unit-mass rate control meter with the gas of concentration known.
This device adopts the Infrared High-Power heat radiation light source as light source, and general optical filter slot is equipped with in inside.This device is pointed strong, reliability height, compact conformation, time response piece, and plurality of advantages such as energy continuous coverage, optical filter can be realized the early warning of fire respectively and trace toxic is harmful to gas leakage and inflammable gas is surveyed fast and accurately by changing.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is an optical filter slot synoptic diagram.
Fig. 3 is the structural representation of the utility model device power supply.
Fig. 4 is the structural representation of the utility model control device.
Number in the figure: 1 is infrared light supply, and 2 is the chopper column, and 3 is the chopper impeller, 4 is optical filter, and 5 is photoacoustic cell, and 6 is microphone, 7 is infrared eye, and 8 is the device power supply, and 9 is control device, 10 is pedestal, and 11 are damping plastic mattress pin, and 12 is solenoid valve, 13 are the gas production pump, and 14 is amplifier, and 15 is controller power source, 16 is the actuator power supply, and 17 is light source power, and 18 is solenoid valve controller, 19 are the gas production pump controller, and 20 is the mass flowmeter controller, and 21 is mass flowmeter, 22 is data acquisition unit, and 23 is chopper, and 24 is the gold-plated pipe of photoacoustic cell, 25 is air admission hole, 26 is venthole, and 27 is case, and 28 is the optical filter slot.
Embodiment
Further specify the utility model below by embodiment.
Embodiment 1, connects each parts by Fig. 1-mode shown in Figure 4, and the person skilled in art all can smooth implementation.Light source 1 adopts the Infrared High-Power heat radiation light source, and model is IR-12, HawkEye Technologies, and LLC, and make infrared light can be good at focusing on to pass optical filter by ellipsoidal mirror and enter photoacoustic cell 5.The model of chopper 23 is ScitecCop.CD-12, form by chopper column and chopper impeller, after being positioned at light source 1, optical filter 4 is fixed in the optical filter slot 27, be close to chopper impeller 3, after photoacoustic cell 5 is positioned at optical filter 4, two microphones 6 place photoacoustic cell 5 central inwalls, and microphonic model is EK3133, and the gold-plated pipe 5 of photoacoustic cell adopts brass material, its inwall adopts cylindrical structural, and gold-plated through polishing, it is of a size of diameter 14mm, and long is the cylindrical of 50mm, the model of infrared eye 6 is kT-3130, and device power supply 8 is by amplifier and controller power source, actuator power supply and light source power three parts are formed; Control device 9 is made up of solenoid control, the control of gas production pump, mass flowmeter control and working station indicator control.What solenoid valve adopted is the 2P025-06-DC12V solenoid valve, and the gas production pump adopts 8032 series membranes chip electromagnetic pumps, and the mass flowmeter model is D07-12A.Whole device is being covered by instrument case 27, and instrument case 27 materials adopt the thick aluminium sheet of 1mm, and pedestal 10 adopts the thick aluminium sheet of 15mm, and the bottom also is equipped with damping plastic mattress pin 11.The utlity model has with strong points, reliability height, compact conformation, time response piece, and plurality of advantages such as energy continuous coverage, optical filter can be realized the early warning of fire respectively and trace toxic is harmful to gas leakage and inflammable gas is surveyed fast and accurately by changing.
Claims (5)
1, a kind of pure gas pick-up unit that adopts infrared light supply based on photoacoustic principle, mainly form by infrared light supply (1), chopper (23), optical filter (4), photoacoustic cell (5), microphone (6), infrared eye (7), device power supply (8), control device (9), pedestal (10), gas production pump (13), mass flowmeter (21), it is characterized in that chopper (23) is made up of chopper column (2) and chopper impeller (3), chopper impeller (3) is fixed on the chopper column (2), and chopper column (2) is fixed on the pedestal (10); Optical filter (4) is fixed in the optical filter slot (28); Photoacoustic cell (5) middle part is hollow, and inwall is the gold-plated pipe of photoacoustic cell (24), and is cylindrical; Microphone (6) is two, is individually fixed in the central authorities of the gold-plated pipe of photoacoustic cell (24); Device power supply (8) is fixed on the pedestal (10), is made up of amplifier (14), controller power source (15), actuator power supply (16) and light source power (17); Control device (9) is fixed on the pedestal, connects data acquisition unit (22), is made up of solenoid valve controller (18), gas production pump controller (19), mass flowmeter controller (20); Amplifier (14) is two, a upper end of being fixed in photoacoustic cell (5), and another amplifier (14) is fixed in infrared eye (7) one sides; Photoacoustic cell (5) periphery is provided with air admission hole (25), venthole (26); Battery valve (12) is two, connects air admission hole (25), the venthole (26) of photoacoustic cell (5) respectively; One end of gas production pump (13) connects solenoid valve (12), other end quality of connection flowmeter (21); Light source (1) is aimed at the light inlet of chopper (23), and the light-emitting window of chopper (23) is aimed at the optical filter (4) in the optical filter slot (28), and optical filter (4) is aimed at the light inlet of photoacoustic cell (5), and the light-emitting window of photoacoustic cell (5) is aimed at infrared eye (7).
2, the pure gas pick-up unit based on photoacoustic principle employing infrared light supply according to claim 1 is characterized in that controller power source (15) connects amplifier (14), solenoid valve controller (18), gas production pump controller (19), mass flowmeter controller (20) respectively; Actuator power supply (16) connects solenoid valve (12) respectively; Light source power (17) connects light source (1).
3, the pure gas pick-up unit that adopts infrared light supply based on photoacoustic principle according to claim 1, it is characterized in that the solenoid valve controller (18) in the control device (9) connects solenoid valve (12), gas production pump controller (19) connects gas production pump (13), mass flowmeter controller (20) quality of connection flowmeter (21).
4, the pure gas pick-up unit based on photoacoustic principle employing infrared light supply according to claim 1 is characterized in that case (27) links to each other with pedestal (10) by bolt.
5, the pure gas pick-up unit based on photoacoustic principle employing infrared light supply according to claim 4 is characterized in that case (27) bottom is provided with damping plastic mattress pin (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520047846 CN2847297Y (en) | 2005-12-22 | 2005-12-22 | Single gas detector using infrared light source based on optoacoustic principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200520047846 CN2847297Y (en) | 2005-12-22 | 2005-12-22 | Single gas detector using infrared light source based on optoacoustic principle |
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| CN2847297Y true CN2847297Y (en) | 2006-12-13 |
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| CN 200520047846 Expired - Fee Related CN2847297Y (en) | 2005-12-22 | 2005-12-22 | Single gas detector using infrared light source based on optoacoustic principle |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495017A (en) * | 2011-11-09 | 2012-06-13 | 山东惠工电气股份有限公司 | Detecting instrument of sulfur hexafluoride gas decomposition products |
| TWI464386B (en) * | 2013-04-19 | 2014-12-11 | Radiant Innovation Inc | Gas concentration detection device with function of shockproof |
| CN104778807A (en) * | 2014-03-28 | 2015-07-15 | 仲恺农业工程学院 | Remote warning system for farmland fire based on optical-acoustical effects |
| CN105988068A (en) * | 2016-07-15 | 2016-10-05 | 国网江苏省电力公司检修分公司 | Fault detection device for GIS equipment in high-voltage power transmission and transformation power station |
| CN106769973A (en) * | 2017-03-03 | 2017-05-31 | 江苏舒茨测控设备股份有限公司 | Ammonia gas detection means and method are detected using photocaustic spectroscopy |
| CN107389556A (en) * | 2017-08-15 | 2017-11-24 | 江苏舒茨测控设备股份有限公司 | Multi-point sampling optoacoustic spectroscopy gas examination quarantine device |
| CN107560730A (en) * | 2017-08-24 | 2018-01-09 | 中国科学院电子学研究所 | Bicavate photo-acoustic spectrometer |
| CN108287142A (en) * | 2018-01-26 | 2018-07-17 | 南昌航空大学 | Gas real-time detection apparatus and method based on infrared photoacoustic spectra technology |
| CN110018525A (en) * | 2019-04-18 | 2019-07-16 | 长春精仪光电技术有限公司 | A kind of electronic recognition formula optical filter module device and its application method |
| CN110208205A (en) * | 2019-06-03 | 2019-09-06 | 南京工业大学 | Photo-acoustic spectrometer device based on photoacoustic cell mechanism |
-
2005
- 2005-12-22 CN CN 200520047846 patent/CN2847297Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495017A (en) * | 2011-11-09 | 2012-06-13 | 山东惠工电气股份有限公司 | Detecting instrument of sulfur hexafluoride gas decomposition products |
| TWI464386B (en) * | 2013-04-19 | 2014-12-11 | Radiant Innovation Inc | Gas concentration detection device with function of shockproof |
| CN104778807A (en) * | 2014-03-28 | 2015-07-15 | 仲恺农业工程学院 | Remote warning system for farmland fire based on optical-acoustical effects |
| CN104778807B (en) * | 2014-03-28 | 2018-07-24 | 仲恺农业工程学院 | Farmland fire remote alarming system based on optoacoustic effect |
| CN105988068A (en) * | 2016-07-15 | 2016-10-05 | 国网江苏省电力公司检修分公司 | Fault detection device for GIS equipment in high-voltage power transmission and transformation power station |
| CN106769973A (en) * | 2017-03-03 | 2017-05-31 | 江苏舒茨测控设备股份有限公司 | Ammonia gas detection means and method are detected using photocaustic spectroscopy |
| CN107389556A (en) * | 2017-08-15 | 2017-11-24 | 江苏舒茨测控设备股份有限公司 | Multi-point sampling optoacoustic spectroscopy gas examination quarantine device |
| CN107560730A (en) * | 2017-08-24 | 2018-01-09 | 中国科学院电子学研究所 | Bicavate photo-acoustic spectrometer |
| CN108287142A (en) * | 2018-01-26 | 2018-07-17 | 南昌航空大学 | Gas real-time detection apparatus and method based on infrared photoacoustic spectra technology |
| CN110018525A (en) * | 2019-04-18 | 2019-07-16 | 长春精仪光电技术有限公司 | A kind of electronic recognition formula optical filter module device and its application method |
| CN110208205A (en) * | 2019-06-03 | 2019-09-06 | 南京工业大学 | Photo-acoustic spectrometer device based on photoacoustic cell mechanism |
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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: 20061213 Termination date: 20131222 |