CN103913546A - High-precision probe - Google Patents
High-precision probe Download PDFInfo
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- CN103913546A CN103913546A CN201410130546.9A CN201410130546A CN103913546A CN 103913546 A CN103913546 A CN 103913546A CN 201410130546 A CN201410130546 A CN 201410130546A CN 103913546 A CN103913546 A CN 103913546A
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Abstract
The invention relates to a high-precision probe which comprises a gas detection module and a microcomputer processing module, a temperature detection module and a heating voltage control module; after the temperature detection module detects the temperature of gas, the temperature information of the gas is sent to the microcomputer processing module, the microcomputer processing module processes the temperature information of the gas and sends the comparison result to the heating voltage control module, the heating voltage control module sends feedback voltage to the gas detection module, the microcomputer processing module internally stores different characteristic curves aiming at different chemical gases and internally inputs different response coefficients according to intrinsic properties of the chemical gases, different responses are initiated aiming at different gases when concentration measurement is carried out on the gas, thus the measuring precision is greatly improved.
Description
Technical field
The present invention relates to gasmetry field, relate in particular to a kind of high precision probe.
Background technology
Gas probe, it is gas-monitoring probe, claim again solid type gas detecting instrument, coordinate gas-monitoring controller to use, gas probe is widely applied in all kinds of Biochemical Labs at present, owing to can produce all kinds of chemical gas in the time doing chemical experiment, in the time that the concentration of chemical gas exceedes certain proportion, chemical gas can produce bad impact to experimenter's health, conventionally in the vent cabinet that carries out chemical experiment, also can pop one's head in by installing gas, for chemical gas in laboratory is carried out to on-line real time monitoring, in the time having leakage or danger to occur, remind the relevant personnel to take measures on customs clearance and protect the personnel that work at the scene, common gas probe is made up of sensor and interlock circuit conventionally at present, traditional gas probe is generally made up of gas sensor and microprocessor, but, all there is a general problem in common gas probe now, can not respond according to the character of chemical gas, the gas probe of main flow generally all only has a response coefficient now, the gas concentration family curve that this class gas probe is measured is all generally an oblique line, the response curve of different chemical gas is all identical, and in fact due to the reason of chemical gas self chemical property, response when each chemical gas is measured is all different, while being each chemical gas measurement concentration, all can there is one's own family curve, if measured with gas probe common on market, the error of the gas concentration data that obtains can be very large, cannot accomplish accurate measurement completely.
Summary of the invention
The present invention aims to provide a kind of high-precision gas probe.
For achieving the above object, the present invention by the following technical solutions, a kind of high precision probe, comprise gas detection module and micro computer processing module, after gas detection module measure gas concentrations, gas concentration information is sent to the processing of micro computer processing module, gas concentration information is after micro computer processing module is processed, probe output gas concentration data-signal, described high precision probe also comprises temperature detecting module and heating voltage control module, temperature detecting module connects gas detection module and micro computer processing module, temperature detecting module detects after the temperature of gas, the temperature information of gas is sent to micro computer processing module, by micro computer processing module, the temperature information of gas is processed, and comparative result is sent to heating voltage control module, the comparison information that heating voltage control module can send out according to micro computer processing module is adjusted the size of feedback voltage, heating voltage control module can be sent to gas detection module by feedback voltage subsequently, micro computer processing module internal needle stores different family curves to different chemical gas, different response coefficients is inputted according to the self property of chemical gas in micro computer processing module inside, in the time that being carried out to measurement of concetration, gas initiates different responses for different gas.
As preferably, described micro computer processing module comprises data storage chip, data-signal conversion chip and microprocessor.
As preferably, described data storage chip, data-signal conversion chip and microprocessor all adopt single-chip microcomputer.
As preferably, described data storage chip model is 24C02.
As preferably, described data-signal process chip model is DAC7512N.
As preferably, described microprocessor model is MC81F4204M.
Pop one's head in for the very poor problem of different chemical gasmetry precision in order to solve conventional gas, the present invention has inputted the grey density characteristics curve of different chemical gas in micro computer processing module, due to the reason of each chemical gas self-characteristic, each chemical gas has the concentration curve of himself uniqueness, different from gas probe in the past, the present invention has drawn family curve to common chemical gas, and deposit related coefficient in micro computer processing module, in the time measuring, can automatically select corresponding response according to the kind of chemical gas like this, improve greatly the precision of measuring.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination is understood becoming the description of embodiment obviously and easily, wherein:
Fig. 1 is module diagram of the present invention;
Fig. 2 is the circuit diagram of the embodiment of the present invention;
Fig. 3 is the performance diagram that the embodiment of the present invention is measured normal hexane concentration.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Be exemplary below by the embodiment being described with reference to the drawings, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, unless otherwise prescribed and limit, it should be noted that, term " installation ", " being connected ", " connection " should be interpreted broadly, for example, can be mechanical connection or electrical connection, can be also the connection of two element internals, can be to be directly connected, also can indirectly be connected by intermediary.For the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
Participate in shown in Fig. 1 and Fig. 2, a kind of high precision probe, comprise gas detection module and micro computer processing module, after gas detection module measure gas concentrations, gas concentration information is sent to the processing of micro computer processing module, gas concentration information is after micro computer processing module is processed, probe output gas concentration data-signal, described high precision probe also comprises temperature detecting module and heating voltage control module, temperature detecting module connects gas detection module and micro computer processing module, temperature detecting module detects after the temperature of gas, the temperature information of gas is sent to micro computer processing module, by micro computer processing module, the temperature information of gas is processed, and comparative result is sent to heating voltage control module, the comparison information that heating voltage control module can send out according to micro computer processing module is adjusted the size of feedback voltage, heating voltage control module can be sent to gas detection module by feedback voltage subsequently, micro computer processing module internal needle stores different family curves to different chemical gas, different response coefficients is inputted according to the self property of chemical gas in micro computer processing module inside, in the time that being carried out to measurement of concetration, gas initiates different responses for different gas.
As preferably, described micro computer processing module comprises data storage chip, data-signal conversion chip and microprocessor, described data storage chip model is 24C02, and described data-signal process chip model is DAC7512N, and described microprocessor model is MC81F4204M.
As preferably, gas detection module of the present invention is made up of a gas sensor and two resistance, two resistance are respectively R11 and R12, R11 and R12 are connected in respectively two ports of gas sensor, other end common ground, gas detection module connects heating voltage control module, described heating voltage control module is made up of a feedback circuit, described feedback circuit comprises 3 triodes and 5 resistance, described triode is respectively G2, G3 and G4, described resistance is respectively R5, R6, R7, R8 and R9, R5 one end connects CL port, other end one end connects the base stage of R6 and G2, G2 is NPN type triode, model is 8050, the other end ground connection of R6 also connects the emitter of G2, R7 one end connects VCC, the emitter of G3 and the collector of G4, G3 is positive-negative-positive triode, model is 8550, G4 is NPN type triode, model is 3082, the other end of R7 connects the base stage of R8 and G3, the other end of R8 connects the collector of G2, between the collector of G3 and the base stage of G4, be connected with R9, the emitter of G4 connects the gas sensor of gas detection module.
Pop one's head in for the very poor problem of different chemical gasmetry precision in order to solve conventional gas, the present invention has inputted the grey density characteristics curve of different chemical gas in micro computer processing module, due to the reason of each chemical gas self-characteristic, each chemical gas has the concentration curve of himself uniqueness, different from gas probe in the past, the present invention has drawn family curve to common chemical gas, and deposit related coefficient in micro computer processing module, in the time measuring, can automatically select corresponding response according to the kind of chemical gas like this, improve greatly the precision of measuring.
Shown in Figure 3, the present invention, in the time measuring the concentration of normal hexane, clearly has a family curve, the concentration that in figure, the longitudinal axis is gas, transverse axis is the density of gas, the present invention is directed to normal hexane and drawn such performance diagram, and corresponding response function has been stored in micro computer processing module, like this, in the time that probe starts to measure, micro computer processing module can be transferred the response message of normal hexane automatically, after converting, can obtain concentration information accurately.
In the description of this instructions, the description of reference term " embodiment ", " example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And specific features, structure, material or the feature of description can be with suitable mode combination in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present invention and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is limited by claim and equivalent thereof.
Claims (6)
1. a high precision probe, comprise gas detection module and micro computer processing module, after gas detection module measure gas concentrations, gas concentration information is sent to the processing of micro computer processing module, gas concentration information is after micro computer processing module is processed, probe output gas concentration data-signal, it is characterized in that, described high precision probe also comprises temperature detecting module and heating voltage control module, temperature detecting module connects gas detection module and micro computer processing module, temperature detecting module detects after the inner temperature of probe, the temperature information of probe is sent to micro computer processing module, by micro computer processing module, the temperature information of probe is processed, and comparative result is sent to heating voltage control module, the comparison information that heating voltage control module can send out according to micro computer processing module is adjusted the size of feedback voltage, heating voltage control module can be sent to gas detection module by feedback voltage subsequently, thereby control the working temperature of probe, now gas concentration information is sent to micro computer processing module by gas detection module, micro computer processing module internal needle stores different family curves to different chemical gas, different response coefficients is inputted according to the self property of chemical gas in micro computer processing module inside, in the time that being carried out to measurement of concetration, gas initiates different responses for different gas.
2. high precision probe according to claim 1, is characterized in that, described micro computer processing module comprises data storage chip, data-signal conversion chip and microprocessor.
3. high precision probe according to claim 2, is characterized in that, described data storage chip, data-signal conversion chip and microprocessor all adopt single-chip microcomputer.
4. high precision probe according to claim 3, is characterized in that, described data storage chip model is 24C02.
5. high precision probe according to claim 3, is characterized in that, described data-signal process chip model is DAC7512N.
6. high precision probe according to claim 3, is characterized in that, described microprocessor model is MC81F4204M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410130546.9A CN103913546B (en) | 2014-04-02 | 2014-04-02 | A kind of high accuracy probe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410130546.9A CN103913546B (en) | 2014-04-02 | 2014-04-02 | A kind of high accuracy probe |
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| Publication Number | Publication Date |
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| CN103913546A true CN103913546A (en) | 2014-07-09 |
| CN103913546B CN103913546B (en) | 2016-07-06 |
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| CN201410130546.9A Active CN103913546B (en) | 2014-04-02 | 2014-04-02 | A kind of high accuracy probe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449809A (en) * | 2017-09-28 | 2017-12-08 | 艾欧史密斯(中国)热水器有限公司 | gas concentration measuring method, device and air purifier |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN200968958Y (en) * | 2006-11-11 | 2007-10-31 | 田红兵 | Gas concentration measuring device |
| CN202512106U (en) * | 2012-03-26 | 2012-10-31 | 钱国东 | Singlechip-based multi-gas detection system |
| CN202903766U (en) * | 2012-10-24 | 2013-04-24 | 湖南省国瑞仪器有限公司 | Intelligent type fixed gas detection instrument |
| CN203324220U (en) * | 2013-06-21 | 2013-12-04 | 南京信息工程大学 | Multi-component gas monitoring device |
| CN103529095A (en) * | 2013-10-28 | 2014-01-22 | 新疆智翔科技有限公司 | Poisonous and harmful gas monitoring system |
-
2014
- 2014-04-02 CN CN201410130546.9A patent/CN103913546B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200968958Y (en) * | 2006-11-11 | 2007-10-31 | 田红兵 | Gas concentration measuring device |
| CN202512106U (en) * | 2012-03-26 | 2012-10-31 | 钱国东 | Singlechip-based multi-gas detection system |
| CN202903766U (en) * | 2012-10-24 | 2013-04-24 | 湖南省国瑞仪器有限公司 | Intelligent type fixed gas detection instrument |
| CN203324220U (en) * | 2013-06-21 | 2013-12-04 | 南京信息工程大学 | Multi-component gas monitoring device |
| CN103529095A (en) * | 2013-10-28 | 2014-01-22 | 新疆智翔科技有限公司 | Poisonous and harmful gas monitoring system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449809A (en) * | 2017-09-28 | 2017-12-08 | 艾欧史密斯(中国)热水器有限公司 | gas concentration measuring method, device and air purifier |
| CN107449809B (en) * | 2017-09-28 | 2019-03-12 | 艾欧史密斯(中国)热水器有限公司 | Gas concentration measuring method, device and air purifier |
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| CN103913546B (en) | 2016-07-06 |
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