CN203772835U - Constant-temperature probe - Google Patents
Constant-temperature probe Download PDFInfo
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- CN203772835U CN203772835U CN201420157452.6U CN201420157452U CN203772835U CN 203772835 U CN203772835 U CN 203772835U CN 201420157452 U CN201420157452 U CN 201420157452U CN 203772835 U CN203772835 U CN 203772835U
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Abstract
The utility model relates to a constant-temperature probe, which comprises a gas detection module and a microcomputer processing module, as well as a temperature detection module and a heating voltage control module, wherein the temperature detection module is connected with the gas detection module and the microcomputer processing module, the temperature detection module detects the temperature inside the probe, and then sends the temperature information of the probe to the microcomputer processing module, the microcomputer processing module is used for processing the temperature information of the probe and sends a comparison result to the heating voltage control module, the heating voltage control module regulates the size of feedback voltage according to the comparison information sent by the microcomputer processing module, and then the heating voltage control module can send the feedback voltage to the gas detection module, so that the working temperature of the probe can be controlled, the constant working temperature of the detection module can be guaranteed, the influence of gas temperature change on the gas concentration detection accuracy can be eliminated, and the stability of the probe can be guaranteed.
Description
Technical field
The utility model relates to gasmetry field, relates in particular to a kind of thermostat 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, be subject to ambient temperature effect very large, once gas temperature changes, and the internal temperature of gas probe also can be affected thereupon, the gas concentration data that detect like this will produce very large error comparatively speaking, and consider the singularity that chemical experiment need to be ventilated, general chemical laboratory all can carry out chemical experiment in vent cabinet, discharge poisonous chemical gas that like this can be instant, like this in the time ventilating, the wind that blower fan drives not only can be taken away chemical gas, also can take away heat, cause the working temperature of gas probe to change, cause the error while measurement.
Utility model content
The utility model aims to provide a kind of gas probe that keeps constant working temperature.
For realizing above-mentioned utility model object, the utility model by the following technical solutions, a kind of thermostat 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 thermostat 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, thereby control the temperature of probe.
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.
Thereby be easily subject to external action and cause the poor problem of gas probe Measurement sensibility in order to solve the working temperature of conventional gas probe, the utility model has increased temperature detecting module and heating voltage control module, temperature detecting module is for detection of the internal temperature of probe, and the temperature information of probe is sent to micro computer processing module, compared after processing by micro computer processing module, feedback information is sent to heating voltage control module, heating voltage control module can produce bucking voltage according to feedback information, and bucking voltage is acted on to gas detection module, the working temperature of guaranteeing detection module is constant, thereby get rid of gas temperature and change the impact that pneumatic concentration is detected to degree of accuracy, guarantee the stability of probe.
Brief description of the drawings
Above-mentioned and/or additional aspect of the present utility model 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 utility model;
Fig. 2 is the circuit diagram of the utility model embodiment.
Embodiment
Describe embodiment of the present utility model 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 utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, 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.
Shown in Fig. 1 and Fig. 2, a kind of thermostat 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 thermostat 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, thereby control the temperature of probe.
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 described in the utility model 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.
Thereby be easily subject to external action and cause the poor problem of gas probe Measurement sensibility in order to solve the working temperature of conventional gas probe, the utility model has increased temperature detecting module and heating voltage control module, temperature detecting module is for detection of the internal temperature of probe, and the temperature information of probe is sent to micro computer processing module, compared after processing by micro computer processing module, feedback information is sent to heating voltage control module, heating voltage control module can produce bucking voltage according to feedback information, and bucking voltage is acted on to gas detection module, the working temperature of guaranteeing detection module is constant, thereby get rid of gas temperature and change the impact that pneumatic concentration is detected to degree of accuracy, guarantee the stability of probe.
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 utility model 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 embodiment of the present utility model, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present utility model and aim, can carry out multiple variation, amendment, replacement and modification to these embodiment, scope of the present utility model is limited by claim and equivalent thereof.
Claims (6)
1. a thermostat 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 thermostat 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.
2. thermostat 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. thermostat 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. thermostat probe according to claim 3, is characterized in that, described data storage chip model is 24C02.
5. thermostat probe according to claim 3, is characterized in that, described data-signal process chip model is DAC7512N.
6. thermostat probe according to claim 3, is characterized in that, described microprocessor model is MC81F4204M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420157452.6U CN203772835U (en) | 2014-04-02 | 2014-04-02 | Constant-temperature probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420157452.6U CN203772835U (en) | 2014-04-02 | 2014-04-02 | Constant-temperature probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203772835U true CN203772835U (en) | 2014-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420157452.6U Expired - Fee Related CN203772835U (en) | 2014-04-02 | 2014-04-02 | Constant-temperature probe |
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| Country | Link |
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| CN (1) | CN203772835U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459026A (en) * | 2014-04-02 | 2015-03-25 | 太仓华风环保科技有限公司 | Constant-temperature probe |
| CN113267535A (en) * | 2021-07-21 | 2021-08-17 | 深圳盛方科技有限公司 | Intelligent gas identification method and device |
-
2014
- 2014-04-02 CN CN201420157452.6U patent/CN203772835U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459026A (en) * | 2014-04-02 | 2015-03-25 | 太仓华风环保科技有限公司 | Constant-temperature probe |
| CN104459026B (en) * | 2014-04-02 | 2016-07-06 | 太仓华风环保科技有限公司 | A kind of thermostat probe |
| CN113267535A (en) * | 2021-07-21 | 2021-08-17 | 深圳盛方科技有限公司 | Intelligent gas identification method and device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 |
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| CF01 | Termination of patent right due to non-payment of annual fee |