CN1896742A - Space-pollution realtime monitoring indicator - Google Patents
Space-pollution realtime monitoring indicator Download PDFInfo
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- CN1896742A CN1896742A CN 200610051911 CN200610051911A CN1896742A CN 1896742 A CN1896742 A CN 1896742A CN 200610051911 CN200610051911 CN 200610051911 CN 200610051911 A CN200610051911 A CN 200610051911A CN 1896742 A CN1896742 A CN 1896742A
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Abstract
This invention discloses a real time monitoring and demonstrating instrument of space pollution, it is used for real time demonstrating of air pollution and its thickness of environment. The measured gas is pumped into the buffer gas bag, before the measured gas entering the sensor array it passes the flow controlling device, pressure sensor and constant temperature air chamber in proper order, the sensor array testing data signal is transmitted to neural networks identifying center through the enlarging circuit, AD change circuit. Firstly, the measured gas is stored in the buffer gas bag, pumped by the gas pump, therefore, cleaning the air chamber with clean air before and after the test. After enlarging, AD change, the signal enters PC through serial port to do pattern recognition.
Description
Technical field
The present invention relates to a kind of space-pollution realtime monitoring indicator, be used for airborne pollutant of real-time display environment and concentration thereof.
Background technology
Along with developing rapidly of China's industrial and agricultural production, when having strengthened national economic strength and uplifting the people's living standard, also increased the possibility that the burst that causes environmental pollution takes place greatly.Make a large amount of poisonous and hazardous benzene series logistics go into Song Hua River as the big bang of chemical plant, Jilin, caused the pollution of waterhead in numerous cities on the way, caused very big economic loss, and had influence on international relations to a certain extent.Somewhere phenixin groove tank car skip car event in transit and for example, reveal material polluted near more than 100 mouthful of well saliva well, force a large amount of canned water emergencies of local government's urgency call.Also have a lot of sudden environmental pollution incidents, comprise the contamination accident that the improper discharging because of the leakage of producing, storing, transporting or discharging the improper poisonous and harmful substance that causes (coal gas, petroleum gas, benzene series thing, agricultural chemicals etc.), a large amount of municipal effluent, factories and miness waste water, solid waste etc. causes.In addition, the air quality of crowded places such as exhibition center, cinema, market is obviously relatively poor, and especially festivals or holidays, the air quality in these places will be poorer.And neither one site environment quality inspection device is monitored the public place in the prior art, though also existing environmental monitoring vehicles are in the detection of carrying out some relevant items, but car load costs an arm and a leg, and the daily monitoring that also is not suitable as some indoor scenarios is used.
In daily monitoring, need the experimenter to have very high ability to work relatively, could in the short as far as possible time, judge accurately, with the kind of determining polluter, physicochemical property, on-the-spot concentration, possible site disposals such as the extent of injury are badly in need of to surrounding enviroment parameter experimental data.Nonetheless, also often be difficult to accurate judgement because there not being standard specimen.At present, also do not have both at home and abroad a kind of air-polluting that is used for workshop and public place automatically, in real time, monitoring, publicity, warning hang and can portable instrument.
Summary of the invention
The present invention solves above-mentioned existing in prior technology technical matters, provide a kind of be applied to workshop and public place to air-polluting automatically, in real time, monitoring, publicity, the real-time publicity instrument of warning.
Above-mentioned technical matters of the present invention is mainly solved by following technical proposals: a kind of space-pollution realtime monitoring indicator, tested gas extracts via air pump and enters into airbag, between airbag and the air pump sensor array is set, the data signal under test of sensor array is transferred to the neural network recognition system via amplifying circuit, A/D convertor circuit.
As preferably, also set gradually volume control device, pressure transducer and constant temperature air chamber between described airbag and the sensor array.
The present invention is a piece-rate system with improved chromatogram arrangement, can realize the detection of microcomponent, is aided with artificial neural network expert recognition system the data of sensor acquisition are handled, and the qualitative, quantitative data of each component accurately are provided.Simultaneously, the present invention makes up flexibly, both can directly directly carry out daily monitoring with Electronic Nose to specified ingredients with many probes form, also can introduce and after chromatographic system separates the complex environment sample be carried out accurate qualitative and quantitative detection.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the present invention.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment: referring to Fig. 1, tested gas 1 extracts via air pump 7 and enters into airbag 2, successively by volume control device 3, pressure transducer 4 and constant temperature air chamber 5, the data signal under test of sensor array 6 is transferred to neural network recognition system 10 via amplifying circuit 9, A/D convertor circuit 8 before tested gas 1 enters sensor array 6.
Tested gas at first is stored in the airbag, is extracted out by air pump then, therefore, before and after the test, needs to clean air chamber with pure air.Signal enters microcomputer through the AD conversion by serial port again and carries out pattern-recognition through amplifying.
The volume of constant temperature air chamber is very little, and after the tested gas of q.s imported, original gas was washed out, and makes air chamber gas consistent with tested gas componant.Because under the varying environment temperature, the response characteristic of gas sensor is different.Particularly will carry out under the requirement of low concentration test, the interference of temperature is very significant.Easily cause the air chamber temperature fluctuation when importing gas in addition, be difficult to even can not recover the former temperature of sensor.The constant temperature measures that adopts pid control algorithm to realize can guarantee the working sensor temperature constant.
Sensor array is selected SnO for use
2Sensor is as the first-selected Sensitive Apparatus of tectonic system, and be because such sensor has following characteristics: (1) is highly sensitive, and resistance change rate is big, and output signal is strong, need not carry out high power and amplify, and helps data acquisition and improves accuracy of detection; (2) resistance of sensor is fit to micro-light concentration gas and measures along with detected gas concentration is index variation very much; (3) physics of sensor, chemical stability are good, and device lifetime is long, and is corrosion-resistant, is difficult for poisoning; (4) SnO
2Gas sensor absorption and desorption time are short, thereby the response time is short, are suitable for continuously long-time the use; (5) broad spectrum activity and ease for use; (6) cheap.Native system comprises each two of TGS813, TGS822 and TGS812 that Figaro company produces, and wherein TGS822 is mainly to the organic gas sensitivity, and TGS812 and TGS813 are the broad spectrum activity gas sensors.In addition because SnO
2Gas sensor is very responsive to the variation of temperature and humidity, thereby cause test process very high to environment requirement, native system joins sensor array with temp-sensitive sensor (AD590) and each one of temp-sensitive sensor (thick film macromolecule moisture sensor), temperature and humidity as parameter, is merged other gas information and carries out comprehensive evaluation together.
AD data acquisition system adopted 8098 is made CPU, adopts the STD bus structure, by the CPU masterplate, and A/D data acquisition template, the keyboard display board constitutes.Its function of mainly finishing is as follows: (1) data acquisition function connects the sensor acquisition data by the A/D plate; (2) the temporary function of data, the data that obtained by the A/D plate temporarily deposit among the RAM on the CPU board; (3) setting of A/D acquisition function.By keyboard, the function of A/D is set.For example: sample frequency, number of samples, passage etc.; (4) data processing function.Data (sampling gets) are analyzed, drawn mean value, maximum, minimum value, peak value etc.; (5) data query function.Can inquire about the data and the analysis data of sampling gained; (6) data-transformation facility.RAM data on the CPU board are conveyed in the PC.
The neural network recognition system has been constructed one from being input to the forward pass net of output.The learning algorithm of network is vital, has adopted most popular BP algorithm.
At last, should be pointed out that above embodiment only is the more representational example of the present invention.Obviously, technical scheme of the present invention is not limited to the foregoing description, and many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (2)
1. space-pollution realtime monitoring indicator, it is characterized in that entering into airbag (2) via air pump (7) extraction at described tested gas (1), between airbag (2) and the air pump (7) sensor array (6) is set, the data signal under test of sensor array (6) is transferred to neural network recognition system (10) via amplifying circuit (9), A/D convertor circuit (8).
2. space-pollution realtime monitoring indicator according to claim 1 is characterized in that also setting gradually volume control device (3), pressure transducer (4) and constant temperature air chamber (5) between described airbag (2) and sensor array (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610051911 CN1896742A (en) | 2006-06-12 | 2006-06-12 | Space-pollution realtime monitoring indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610051911 CN1896742A (en) | 2006-06-12 | 2006-06-12 | Space-pollution realtime monitoring indicator |
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| CN1896742A true CN1896742A (en) | 2007-01-17 |
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| CN 200610051911 Pending CN1896742A (en) | 2006-06-12 | 2006-06-12 | Space-pollution realtime monitoring indicator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101101300B (en) * | 2007-06-07 | 2011-08-10 | 北京中立格林控制技术有限公司 | Public place air environment monitoring display system |
| CN102445473A (en) * | 2011-11-16 | 2012-05-09 | 北京明尼特环保科技有限公司 | Method and system for monitoring and analyzing air |
| CN102768226A (en) * | 2012-07-31 | 2012-11-07 | 北京卫星环境工程研究所 | Flight test device for detecting polluted spatial environment by aid of solar cells and flight test method for detecting polluted spatial environment by aid of flight test device |
| CN103956189A (en) * | 2014-04-30 | 2014-07-30 | 江苏精一电气科技有限公司 | Booth box with PM 2.5 monitoring function |
| CN111480064A (en) * | 2017-08-18 | 2020-07-31 | 山东诺方电子科技有限公司 | Atmospheric pollutants monitoring facilities |
-
2006
- 2006-06-12 CN CN 200610051911 patent/CN1896742A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101101300B (en) * | 2007-06-07 | 2011-08-10 | 北京中立格林控制技术有限公司 | Public place air environment monitoring display system |
| CN102445473A (en) * | 2011-11-16 | 2012-05-09 | 北京明尼特环保科技有限公司 | Method and system for monitoring and analyzing air |
| CN102445473B (en) * | 2011-11-16 | 2014-07-16 | 北京安普兑电子科技有限公司 | Method and system for monitoring and analyzing air |
| CN102768226A (en) * | 2012-07-31 | 2012-11-07 | 北京卫星环境工程研究所 | Flight test device for detecting polluted spatial environment by aid of solar cells and flight test method for detecting polluted spatial environment by aid of flight test device |
| CN103956189A (en) * | 2014-04-30 | 2014-07-30 | 江苏精一电气科技有限公司 | Booth box with PM 2.5 monitoring function |
| CN111480064A (en) * | 2017-08-18 | 2020-07-31 | 山东诺方电子科技有限公司 | Atmospheric pollutants monitoring facilities |
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Open date: 20070117 |