CN105717062A - Infrared alcohol detection system - Google Patents
Infrared alcohol detection system Download PDFInfo
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- CN105717062A CN105717062A CN201610078420.0A CN201610078420A CN105717062A CN 105717062 A CN105717062 A CN 105717062A CN 201610078420 A CN201610078420 A CN 201610078420A CN 105717062 A CN105717062 A CN 105717062A
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- 238000001514 detection method Methods 0.000 title claims abstract description 33
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 230000003321 amplification Effects 0.000 claims description 25
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 25
- 230000009977 dual effect Effects 0.000 claims description 10
- 230000037361 pathway Effects 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 3
- 238000007517 polishing process Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000009825 accumulation Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 5
- 239000000523 sample Substances 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000035622 drinking Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
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- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses an infrared alcohol detection system.The infrared alcohol detection system comprises a microprocessor, a driving circuit, an infrared sensing system, an amplifying circuit and an A/D switching circuit.The microprocessor, the driving circuit, the infrared sensing system, the amplifying circuit and the A/D switching circuit are connected in sequence.The A/D switching circuit is connected with the microprocessor.The infrared sensing system is a dual-channel infrared sensing system.The infrared alcohol detection system has the advantages that due to the design of the infrared sensing system, detection data can have the high disturbance resistance; a wireless transmission module and a background terminal server are cooperated for use, on the one hand, data can be synchronously transmitted in real time, and data accumulation is effectively avoided; on the other hand, an operator can perform real-time checking; the using safety and reliability of the system are improved through a fingerprint recognizer.
Description
Technical field
The present invention relates to alcohol content tester correlative technology field, refer in particular to a kind of infrared alcohol detection system.
Background technology
Alcohol content tester is primarily referred to as alcohol content of exhalation gas detector, is the detection instrument of a law enforcement designed exclusively for police, and people's police on duty can be used to how many drinking of the driver that drinks carries out concrete process, effectively reduces the generation of major traffic accidents.The alcohol content in other occasions detection characteristics of contaminated respiratory droplets gas can also be used in, it is to avoid the heavy losses of casualties and property.High-risk field can also be used in and forbid enterprise on duty after drinking, the alcohol content tester of enterprise is also non-portable, but wall-mounted alcohol content tester, wall-mounted easy to use compared with having portable, detection speed is accelerated, the benefit that precision is high, wall-mounted in order to be more suitable for enterprises and institutions' use, increase a series of functions such as work attendance, audio alert of swiping the card.
At present, China is in the detection method of some alcohol gas, although the sensing unit sensitivity of employing is significantly high, but owing to being subject to the interference of background gas, the accuracy of analysis is poor；It addition, more existing alcohol gas test equipment, bulky, complicated operation, interface roughness, lack hommization and intellectuality.And existing alcohol content tester, while storage data, often when storage to certain numerical value, it is necessary to manually it being carried out data process, namely uploading data processes, it is impossible to carry out simultaneously operating with timely data.
Summary of the invention
There is above-mentioned deficiency to overcome in the present invention, it is provided that the infrared alcohol detection system that a kind of anti-interference is good in prior art.
To achieve these goals, the present invention is by the following technical solutions:
A kind of infrared alcohol detection system, including microprocessor, drive circuit, infra-red sensing system, amplifying circuit and A/D change-over circuit, described microprocessor, drive circuit, infra-red sensing system, amplifying circuit and A/D change-over circuit are sequentially connected with, described A/D change-over circuit is connected with microprocessor, and described infra-red sensing system is dual pathways infra-red sensing system.
In the present invention, microprocessor controls the modulation signal of drive circuit transmission certain frequency and goes to control infra-red sensing system, due to the dual pathways infra-red sensing system that infra-red sensing system adopts, one of them passage is tested gas passage, and another is reference channel, it is mainly environmental Kuznets Curves passage, by twin-channel contrast design, it is possible to increase the sensitivity of this system and reliability；The small-signal exported by infra-red sensing system, through high-accuracy amplifying circuit, obtains stable signal；Signal is changed through A/D, delivers to microprocessor processes, and the alcohol concentration calculated draws whether drunk driving conclusion, and so design effectively raises the anti-interference of this system.
As preferably, described infra-red sensing system includes supporting housing, light source, air chamber, filter set and detector set, described air chamber is arranged on the center supporting housing, described air chamber removably connects with supporting housing, described light source is placed in one end of air chamber, described filter set is placed in the other end of air chamber, described detector set is placed in filter set, described air chamber is dual pathways air chamber and symmetrical distribution, it is equipped with air inlet and gas outlet in each passage of described air chamber, described drive circuit connects light source, described detector set connects amplifying circuit.This is designed with air chamber and supports the structure that housing separates, and air chamber only need to be fixedly mounted on during installation the center supporting housing, and the supporting construction at two ends facilitates the installation of light source and detector set；This kind of structural design ensure that air chamber is prone to handling, changes, and the air chamber in the middle of changing is without the supporting construction at conversion two ends；Simultaneously because separate with supporting housing, further reduce the impact of external condition, make infra-red sensing system adapt to work under complex environment.
As preferably, described air chamber is provided with one end of light source and is additionally provided with reflecting mirror, and described mirror shapes is parabolic shape, and described light source is placed in the focal point of reflecting mirror.In order to better utilize the emergent light energy of infrared light supply, at the parabolic mirror added behind of light source, light source is arranged on paraboloidal focal point, thus improving the exiting parallel energy of light source.
As preferably, described air chamber adopts cylindrical structural, and the dual pathways inwall of described air chamber all adopts polishing or coating process.Middle air chamber adopts cylindrical structural, and in order to reduce light loss in transmitting procedure, the inwall of air chamber to have enough fineness, it is possible to is realized by the polishing of inwall or plated film.
As preferably, described filter set includes two optical filters, and described detector set includes two detectors, the corresponding optical filter of each passage in described air chamber and a detector, described detector is thermopile detector, and described thermopile detector is in series by some thermocouples.So it is designed to improve detector and infra-red radiation is produced the phase response of variations in temperature, owing to many thermocouple probe are connected, the thermoelectrical potential of each output is formed by stacking, and therefore thermoelectrical potential produced by thermopile detector is far longer than common thermocouple probe；This design is exactly the ultimate principle according to thermocouple temperature measurement, thermopile detector for infrared light detecting goes out to add the area of light receiving surface at probe node, and significantly more efficient absorption infrared light, due to the heat effect of infrared light, the temperature making light receiving surface raises, thus producing thermoelectrical potential.
As preferably, described drive circuit is constant-current source impulse modulation drive circuit, is provided with current foldback circuit in described drive circuit.Ensure the stability that light source exports, use constant-current source to drive；Characteristic according to light source, carries out modulation to light source, thus the structure of simplified system, improves the stability of system；For ensureing infrared light supply service life, take suitable overcurrent protection.
As preferably, described amplifying circuit includes pre-amplification circuit and filter amplification circuit, and described infra-red sensing system connects pre-amplification circuit, and described pre-amplification circuit connects filter amplification circuit, and described filter amplification circuit connects A/D change-over circuit.The voltage signal of detector output is very faint, so the amplifying circuit of high-precision high-amplification-factor must be designed；In the process of circuit design, filtering and the anti-interference process of signal to be considered；Owing to surveyed object is originally as faint amount, restriction by various different sensors sensitivity, obtained signal is fainter, generally cannot be directly used to sampling processing, so in the circuit design of signal detection, general signal is required for the preposition amplification through one or more levels, due to the noise that preposition amplification brings, by selecting the filter amplification circuit of superior performance to make influence of noise minimum.
As preferably, also including display, described display connects microprocessor.By the design of display, it is possible to display alcohol concentration value directly perceived, for the drunk degree judging detected personnel.
As preferably, also including wireless transport module and background terminal server, described wireless transport module is connected with microprocessor, and described background terminal server is connected with wireless transport module.By wireless transport module and background terminal server with the use of, it is possible to real-time uploads detection data, it is prevented that artificial destruction detection data, improves reliability for detection.
As preferably, also including Fingerprint Identification Unit, described Fingerprint Identification Unit is connected with microprocessor.The safety and reliability of this system are guaranteed, it is prevented that detection data are modified by unauthorized people by Fingerprint Identification Unit；The finger print information of the detected personnel of all right typing simultaneously, it is prevented that top bag situation occur in detected personnel, to improve the detection precision of this system.
The invention has the beneficial effects as follows: by the design of infra-red sensing system, it is possible to make detection data have high anti-interference；And wireless transport module and background terminal server with the use of, enable to the transmission of real time data synchronization on the one hand, be effectively prevented overstocking of data, operator can also be carried out real-time examination on the other hand；Improve the safety and reliability of this system by Fingerprint Identification Unit.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
In figure: 1. microprocessor, 2. drive circuit, 3. infra-red sensing system, 4. pre-amplification circuit, 5. filter amplification circuit, 6.A/D change-over circuit, 7. display, 8. wireless transport module, 9. light source, 10. reflecting mirror, 11. air chamber, 12. filter set, 13. detector set, 14. air inlets, 15. gas outlets.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
In embodiment as described in Figure 1, a kind of infrared alcohol detection system, including microprocessor 1, drive circuit 2, infra-red sensing system 3, amplifying circuit and A/D change-over circuit 6, microprocessor 1, drive circuit 2, infra-red sensing system 3, amplifying circuit and A/D change-over circuit 6 are sequentially connected with, A/D change-over circuit 6 is connected with microprocessor 1, and infra-red sensing system 3 is dual pathways infra-red sensing system.
Infra-red sensing system 3 includes supporting housing, light source 9, air chamber 11, filter set 12 and detector set 13, air chamber 11 is arranged on the center supporting housing, air chamber 11 removably connects with supporting housing, light source 9 is placed in one end of air chamber 11, filter set 12 is placed in the other end of air chamber 11, detector set 13 is placed in filter set 12, air chamber 11 is dual pathways air chamber and symmetrical distribution, air inlet 14 and gas outlet 15 it is equipped with in each passage of air chamber 11, drive circuit 2 connects light source 9, and detector set 13 connects amplifying circuit.Air chamber 11 is provided with one end of light source 9 and is additionally provided with reflecting mirror 10, and reflecting mirror 10 shape is parabolic shape, and light source 9 is placed in the focal point of reflecting mirror 10.Air chamber 11 adopts cylindrical structural, and the dual pathways inwall of air chamber 11 all adopts polishing or coating process.Filter set 12 includes two optical filters, and detector set 13 includes two detectors, the corresponding optical filter of each passage in air chamber 11 and a detector, and detector is thermopile detector, and thermopile detector is in series by some thermocouples.
Drive circuit 2 is constant-current source impulse modulation drive circuit, is provided with current foldback circuit in drive circuit 2.Amplifying circuit includes pre-amplification circuit 4 and filter amplification circuit 5, and infra-red sensing system 3 connects pre-amplification circuit 4, and pre-amplification circuit 4 connects filter amplification circuit 5, and filter amplification circuit 5 connects A/D change-over circuit 6.Also including display 7, Fingerprint Identification Unit, wireless transport module 8 and background terminal server, described display 7, Fingerprint Identification Unit and wireless transport module 8 are connected with microprocessor 1, and background terminal server is connected with wireless transport module 8.
In the present invention, microprocessor 1 controls drive circuit 2 and sends the modulation signal of certain frequency and go to control infrared light supply 9；Infrared light by infrared light supply 9 outgoing, one tunnel is through being filled with the air chamber 11 of gas to be measured, infrared light is through the absorption of the air chamber 11 of certain length, and the selectivity through optical filter passes through, and finally arrives detector, another road process and the tested gas air chamber 11 without direct relation, infrared light is through the absorption of the air chamber 11 of equal length, and the selectivity through optical filter passes through, and finally arrives detector, detector records the intensity of the light energy after absorption, reflects the power of GAS ABSORPTION infrared light；The small-signal exported by detector, through the filter amplification circuit 5 of high-accuracy pre-amplification circuit 4 and two grades, obtains stable signal；Signal, through A/D change-over circuit 6, is delivered to microprocessor 1 and is processed, and the alcohol concentration calculated shows on the display 7.Wireless transport module 8 and background terminal server is also included due to this system, alcohol concentration information for calculating is sent to background terminal server by wireless transport module 8 and can understand the information of detected personnel timely, and data are stored, on the one hand can be real-time send the data to background terminal server, can conveniently operator be examined on the other hand.The safety and reliability of this system are guaranteed, it is prevented that the data of detection in this system are modified by unauthorized people by Fingerprint Identification Unit；The finger print information of the detected personnel of all right typing simultaneously, it is prevented that top bag situation occur in detected personnel, to improve the detection precision of this system.
Claims (10)
1. one kind infrared alcohol detection system, including microprocessor (1), drive circuit (2), infra-red sensing system (3), amplifying circuit and A/D change-over circuit (6), described microprocessor (1), drive circuit (2), infra-red sensing system (3), amplifying circuit and A/D change-over circuit (6) are sequentially connected with, described A/D change-over circuit (6) is connected with microprocessor (1), and described infra-red sensing system (3) is dual pathways infra-red sensing system.
2. the infrared alcohol detection system of one according to claim 1, it is characterized in that, described infra-red sensing system (3) includes supporting housing, light source (9), air chamber (11), filter set (12) and detector set (13), described air chamber (11) is arranged on the center supporting housing, described air chamber (11) removably connects with supporting housing, described light source (9) is placed in one end of air chamber (11), described filter set (12) is placed in the other end of air chamber (11), described detector set (13) is placed in filter set (12), described air chamber (11) is dual pathways air chamber and symmetrical distribution, air inlet (14) and gas outlet (15) it is equipped with in each passage of described air chamber (11), described drive circuit (2) connects light source (9), described detector set (13) connects amplifying circuit.
3. the infrared alcohol detection system of one according to claim 2, it is characterized in that, described air chamber (11) is provided with one end of light source (9) and is additionally provided with reflecting mirror (10), described reflecting mirror (10) shape is parabolic shape, and described light source (9) is placed in the focal point of reflecting mirror (10).
4. the infrared alcohol detection system of one according to Claims 2 or 3, is characterized in that, described air chamber (11) adopts cylindrical structural, and the dual pathways inwall of described air chamber (11) all adopts polishing or coating process.
5. the infrared alcohol detection system of one according to claim 2, it is characterized in that, described filter set (12) includes two optical filters, described detector set (13) includes two detectors, the corresponding optical filter of each passage in described air chamber (11) and a detector, described detector is thermopile detector, and described thermopile detector is in series by some thermocouples.
6. the infrared alcohol detection system of one according to claim 1, is characterized in that, described drive circuit (2) is constant-current source impulse modulation drive circuit, is provided with current foldback circuit in described drive circuit (2).
7. the infrared alcohol detection system of one according to claim 1, it is characterized in that, described amplifying circuit includes pre-amplification circuit (4) and filter amplification circuit (5), described infra-red sensing system (3) connects pre-amplification circuit (4), described pre-amplification circuit (4) connects filter amplification circuit (5), and described filter amplification circuit (5) connects A/D change-over circuit (6).
8. the infrared alcohol detection system of one according to claim 1, is characterized in that, also includes display (7), and described display (7) connects microprocessor (1).
9. the infrared alcohol detection system of one according to claim 1, it is characterized in that, also include wireless transport module (8) and background terminal server, described wireless transport module (8) is connected with microprocessor (1), and described background terminal server is connected with wireless transport module (8).
10. the infrared alcohol detection system of one according to claim 1, is characterized in that, also includes Fingerprint Identification Unit, and described Fingerprint Identification Unit is connected with microprocessor (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610078420.0A CN105717062A (en) | 2016-02-04 | 2016-02-04 | Infrared alcohol detection system |
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| CN201610078420.0A CN105717062A (en) | 2016-02-04 | 2016-02-04 | Infrared alcohol detection system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105372199A (en) * | 2015-11-19 | 2016-03-02 | 重庆高略联信智能技术有限公司 | Infrared diffuse reflection-based drunk driving telemetering system and telemetering method |
| CN107328738A (en) * | 2017-06-28 | 2017-11-07 | 武汉米字能源科技有限公司 | The double air chamber trace gas analysis systems of one kind series connection and gas concentration calculate method |
| CN108254542A (en) * | 2017-12-14 | 2018-07-06 | 吴志华 | A kind of cloud storage cloud identification intelligent alcohol detection system with communication module |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105372199A (en) * | 2015-11-19 | 2016-03-02 | 重庆高略联信智能技术有限公司 | Infrared diffuse reflection-based drunk driving telemetering system and telemetering method |
| CN105372199B (en) * | 2015-11-19 | 2019-02-26 | 重庆高略联信智能技术有限公司 | One kind being based on infrared irreflexive drunk driving telemetry system and the method for telemetering |
| CN107328738A (en) * | 2017-06-28 | 2017-11-07 | 武汉米字能源科技有限公司 | The double air chamber trace gas analysis systems of one kind series connection and gas concentration calculate method |
| CN107328738B (en) * | 2017-06-28 | 2019-05-28 | 武汉米字能源科技有限公司 | A kind of double gas chamber trace gas analysis systems and gas concentration calculating method of connecting |
| CN108254542A (en) * | 2017-12-14 | 2018-07-06 | 吴志华 | A kind of cloud storage cloud identification intelligent alcohol detection system with communication module |
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