CN204228687U - A kind of gas analysis sensor - Google Patents
A kind of gas analysis sensor Download PDFInfo
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- CN204228687U CN204228687U CN201420636164.9U CN201420636164U CN204228687U CN 204228687 U CN204228687 U CN 204228687U CN 201420636164 U CN201420636164 U CN 201420636164U CN 204228687 U CN204228687 U CN 204228687U
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Abstract
The utility model embodiment provides a kind of gas analysis sensor, comprising: housing; Be arranged in described housing, hold the air chamber of mixed gas; Be arranged at the pressure detection interface in described housing; Be installed on described pressure detection interface, to the pressure detecting element that the pressure of the gas in described air chamber detects; Be arranged in described housing, be connected with described pressure detecting element, obtain the force value that pressure detecting element detects, when the force value that described pressure detecting element detects is greater than threshold value, disconnect the single-chip microcomputer of the working power of gas analysis sensor.The gas analysis sensor that the utility model embodiment provides achieves the detection to gaseous tension, and provides when gaseous tension rises to a certain degree, to the mechanism that thermal conductivity gas sensor is protected.
Description
Technical field
The utility model relates to sensor technical field, more particularly, relates to a kind of gas analysis sensor.
Background technology
Gas analysis sensor is the device being mainly used in analyzing gas, and gas analysis sensor mainly adopts thermal conductance mode to carry out work, and this type of gas analysis sensor is called thermal conductivity gas sensor; Thermal conductivity gas sensor is by heating the mixed gas entered in thermal conductivity gas sensor, thus detect certain gas in mixed gas and content thereof, convert the information relevant with gaseous species and content to electric signal, thus provide foundation for follow-up detection, monitoring, analysis and warning; As adopted the content of thermal conductivity gas sensor to hydrogen to detect, can be the hydrogen richness analyzed in molten steel further and crucial foundation is provided.
Inventor of the present utility model studies discovery: although thermal conductivity gas sensor, by heating the mixed gas entered in thermal conductivity gas sensor, detects the content of certain gas in mixed gas at present; But in the process of heating mixed gas, will the gaseous tension in thermal conductivity gas sensor be caused to be in propradation, if gaseous tension rises to a certain degree, damage will be caused to thermal conductivity gas sensor; And current existing thermal conductivity gas sensor does not have the function of gas pressure detection, gaseous tension does not rise to a certain degree to the mechanism that thermal conductivity gas sensor is protected.
Visible, a kind of gas analysis sensor is provided, to detect gaseous tension, and is provided in gaseous tension when rising to a certain degree, to the mechanism that thermal conductivity gas sensor is protected, becomes the technical matters that those skilled in the art need solution badly.
Utility model content
In view of this, the utility model embodiment provides a kind of gas analysis sensor, with gaseous tension is detected and be provided in gaseous tension rise to a certain degree time, to the mechanism that thermal conductivity gas sensor is protected.
For achieving the above object, the utility model embodiment provides following technical scheme:
A kind of gas analysis sensor, comprising:
Housing;
Be arranged in described housing, hold the air chamber of mixed gas;
Be arranged at the pressure detection interface in described housing;
Be installed on described pressure detection interface, to the pressure detecting element that the pressure of the gas in described air chamber detects;
Be arranged in described housing, be connected with described pressure detecting element, obtain the force value that pressure detecting element detects, when the force value that described pressure detecting element detects is greater than threshold value, disconnect the single-chip microcomputer of the working power of gas analysis sensor.
Wherein, described gas analysis sensor also comprises:
Be arranged in described housing, to the flow regulation interface that the flow velocity of the mixed gas entering air chamber regulates.
Wherein, described gas analysis sensor also comprises:
Be arranged in described housing, to the heater element that the mixed gas of gas chambers contain heats.
Wherein, described heater element comprises:
Be wrapped in the heater strip on the pedestal of the aluminum of described air chamber.
Wherein, described gas analysis sensor also comprises:
Be arranged in described housing, to the Thermal Conductivity element that the setting gas content in described mixed gas detects;
Be arranged in described housing, be connected with described single-chip microcomputer, the temperature of described air chamber is detected, and the temperature of detection is passed to the temperature sensor of described single-chip microcomputer.
Wherein, described gas analysis sensor also comprises:
Be arranged in described housing, for installing the first PCB of described Thermal Conductivity element and described temperature sensor.
Wherein, described gas analysis sensor also comprises:
Be arranged in described housing, be connected with described heater element with described single-chip microcomputer respectively, under the control of described single-chip microcomputer, control the work of described heater element, with the temperature control circuit making the temperature of described air chamber maintain design temperature scope;
Be arranged in described housing, respectively with described Thermal Conductivity element, described pressure detecting element is connected with described single-chip microcomputer, the voltage signal of the expression of described Thermal Conductivity element testing setting gas content is carried out amplification filtering, the signal converting setting to inputs described single-chip microcomputer, and the voltage signal of the pressure of the expression gas to be detected by described pressure detecting element carries out amplification filtering, converts the signal of setting to, inputs the signal acquisition circuit of described single-chip microcomputer;
Be arranged in described housing, be connected with described single-chip microcomputer, the signal that single-chip microcomputer exports is carried out the signal output apparatus exported.
Wherein, described gas analysis sensor also comprises:
Be arranged in described housing, for installing described single-chip microcomputer, described temperature control circuit, described signal acquisition circuit, and the second PCB of described signal output apparatus.
Wherein, described gas analysis sensor also comprises:
The signaling interface be connected with described signal output apparatus.
Wherein, described signaling interface is provided with water joint.
Based on technique scheme, the gas analysis sensor that the utility model embodiment provides comprises housing; Be arranged in housing, hold the air chamber of mixed gas; Be arranged at the pressure detection interface in housing; Be installed on described pressure detection interface, to the pressure detecting element that the pressure of the gas in described air chamber detects; Be arranged in housing, be connected with described pressure detecting element, obtain the force value that pressure detecting element detects, when the force value that described pressure detecting element detects is greater than threshold value, disconnect the single-chip microcomputer of the working power of gas analysis sensor.The gas analysis sensor that the utility model embodiment provides; the detection of the pressure to the gas in air chamber can be realized by arranging pressure detecting element; simultaneously single-chip microcomputer can the force value of gas in air chamber when being greater than threshold value; disconnect the working power of gas analysis sensor; provide when gaseous tension rises to a certain degree, to the mechanism that thermal conductivity gas sensor is protected.The gas analysis sensor that the utility model embodiment provides achieves the detection to gaseous tension, and provides when gaseous tension rises to a certain degree, to the mechanism that thermal conductivity gas sensor is protected.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The structural representation of the gas analysis sensor that Fig. 1 provides for the utility model embodiment;
Another structural representation of the gas analysis sensor that Fig. 2 provides for the utility model embodiment;
A structural representation again of the gas analysis sensor that Fig. 3 provides for the utility model embodiment;
The another structural representation of the gas analysis sensor that Fig. 4 provides for the utility model embodiment;
Another structural representation again of the gas analysis sensor that Fig. 5 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The structural representation of the gas analysis sensor that Fig. 1 provides for the utility model embodiment, with reference to Fig. 1, this gas analysis sensor can comprise: housing 1, air chamber 2, pressure detection interface 3, pressure detecting element 4 and single-chip microcomputer 5;
Wherein, housing 1 can hold the components and parts of gas analysis sensor; Optionally, housing 1 can adopt stainless steel, stainless steel good heat-insulation effect, and effectively can shield on-the-spot electromagnetic interference (EMI);
Air chamber 2 is arranged in housing 1, can hold mixed gas to be detected;
Pressure detection interface 3 is arranged in housing 1, near the position of air chamber 2, can be used for setting pressure detecting element 4;
Pressure detecting element 4 is installed on pressure detection interface 3, can detect the pressure of the gas in air chamber 2;
Single-chip microcomputer 5 is the data processing core in gas analysis sensor, single-chip microcomputer 5 can be connected with pressure detecting element 4, the force value that pressure detecting element 4 detects can be obtained, when the force value that pressure detecting element 4 detects is greater than threshold value, disconnect the working power of gas analysis sensor, be not damaged to make gas analysis sensor; Threshold value can be the limit detected pressures value of gas analysis sensor.
The gas analysis sensor that the utility model embodiment provides comprises housing; Be arranged in housing, hold the air chamber of mixed gas; Be arranged at the pressure detection interface in housing; Be installed on described pressure detection interface, to the pressure detecting element that the pressure of the gas in described air chamber detects; Be arranged in housing, be connected with described pressure detecting element, obtain the force value that pressure detecting element detects, when the force value that described pressure detecting element detects is greater than threshold value, disconnect the single-chip microcomputer of the working power of gas analysis sensor.The gas analysis sensor that the utility model embodiment provides; the detection of the pressure to the gas in air chamber can be realized by arranging pressure detecting element; simultaneously single-chip microcomputer can the force value of gas in air chamber when being greater than threshold value; disconnect the working power of gas analysis sensor; provide when gaseous tension rises to a certain degree, to the mechanism that thermal conductivity gas sensor is protected.The gas analysis sensor that the utility model embodiment provides achieves the detection to gaseous tension, and provides when gaseous tension rises to a certain degree, to the mechanism that thermal conductivity gas sensor is protected.
Optionally, the utility model embodiment also can control the flow velocity of the mixed gas entering air chamber, thus makes the content detection of a certain gas in mixed gas more accurate.Corresponding, Fig. 2 shows another structural representation of the gas analysis sensor that the utility model embodiment provides, and shown in composition graphs 1 and Fig. 2, gas analysis sensor can also comprise: flow regulation interface 6;
Flow regulation interface 6 is arranged in housing 1, near the position of the air intake opening of air chamber 2; Mixed gas enters air chamber 2 by flow regulation interface 6, thus flow regulation interface 6 can be regulated, to promote the accuracy of the content detection of a certain gas in mixed gas to the flow velocity of the mixed gas entering air chamber.
Optionally, the single-chip microcomputer 5 that the utility model embodiment provides can also as the temperature control core of gas analysis sensor; Corresponding, Fig. 3 shows a structural representation again of the gas analysis sensor that the utility model embodiment provides, shown in composition graphs 2 and Fig. 3, gas analysis sensor can also comprise: heater element 7, Thermal Conductivity element 8, temperature sensor 9, temperature control circuit 10, signal acquisition circuit 11 and signal output apparatus 12;
Optionally, heater element 7 is arranged in housing 1, can heat the mixed gas held in air chamber 2; Optionally, heater element 7 can for being wrapped in the heater strip on the pedestal of the aluminum of air chamber 2, and obviously, heater element 7 also can be other the device with heating function;
Thermal Conductivity element 8 is arranged in housing 1, can detect the setting gas content in mixed gas;
Temperature sensor 9 is arranged in housing 1, can be connected with single-chip microcomputer 5, and temperature sensor 9 can detect the temperature of air chamber 2, and the temperature of detection is passed to single-chip microcomputer 5;
Temperature control circuit 10 is arranged in housing 1, can be connected with heater element 7 with single-chip microcomputer 5 respectively, temperature control circuit 10 can under the control of single-chip microcomputer 5, the duty of control heater part 7, thus make the temperature of air chamber 2 maintain design temperature scope, to keep the heated at constant temperature of the gas in air chamber 2; Optionally, design temperature scope can be 35 DEG C (degree Celsius) to 50 DEG C, obviously also can be the temperature of other numerical value, specifically depending on practical situations;
Signal acquisition circuit 11 is arranged in housing 1, can respectively with Thermal Conductivity element 8, pressure detecting element 4 and single-chip microcomputer 5 connect, the voltage signal of the expression setting gas content that Thermal Conductivity element 8 can detect by signal acquisition circuit 11 carries out amplification filtering, convert the signal input single-chip microcomputer 5 of setting to, and the voltage signal of the pressure of the expression gas that also pressure detecting element 4 can be detected carries out amplification filtering, convert the signal input single-chip microcomputer 5 of setting to;
Optionally, the signal of the expression gaseous tension that pressure detecting element 4 detects, after processing by signal acquisition circuit 11, by signal acquisition circuit 11 by process after signal transmission to single-chip microcomputer 5, thus by single-chip microcomputer 5 when the pressure that pressure detecting element 4 detects is greater than threshold value, disconnect the working power of gas analysis sensor.The signal of expression that Thermal Conductivity element 8 detects setting gas content, after also processing by signal acquisition circuit 11, by signal acquisition circuit 11 by the signal transmission after process to single-chip microcomputer 5, to analyze setting gas content.Obviously, the signal of the temperature of the expression air chamber that temperature sensor 9 detects, also after processing by signal acquisition circuit 11, by signal acquisition circuit 11 by process after signal transmission to single-chip microcomputer 5, the temperature of the air chamber detected according to temperature sensor 9 to make single-chip microcomputer 5, control the work of temperature control circuit 10 control heater part 7, make the temperature of air chamber 2 maintain constant temperature.
Signal output apparatus 12 is arranged in housing 1, can be connected, exported by the signal that single-chip microcomputer 5 exports with single-chip microcomputer 5; Optionally, the various ways such as the optional voltage of signal output apparatus 12, electric current, RS232/485 carries out signal output.
It should be noted that heater element 7 in gas analysis sensor shown in Fig. 3; Thermal Conductivity element 8 and temperature sensor 9; Temperature control circuit 10, signal acquisition circuit 11 and signal output apparatus 12; These three combined optionals get at least one combination arbitrarily and the combined use of device in gas analysis sensor shown in Fig. 1.
Optionally, the utility model embodiment also can arrange PCB (Printed Circuit Board, printed circuit board) circuit board to install the devices such as single-chip microcomputer; Corresponding, Fig. 4 shows the another structural representation of the gas analysis sensor that the utility model embodiment provides, and shown in composition graphs 3 and Fig. 4, gas analysis sensor can also comprise: the first PCB 13 and the second PCB 14;
Optionally, the first PCB 13 can be arranged in housing 1, can be used for installing Thermal Conductivity element 8 and temperature sensor 9;
Second PCB 14 can be arranged in housing 1, can be used for installing single-chip microcomputer 5, temperature control circuit 10, signal acquisition circuit 11 and signal output apparatus 12.
Optionally, the utility model embodiment also can provide gas analysis sensor and external unit to carry out the signaling interface of data interaction, Fig. 5 shows another structural representation again of the gas analysis sensor that the utility model embodiment provides, shown in composition graphs 4 and Fig. 5, gas analysis sensor can also comprise: signaling interface 15; Signaling interface 15 can connect with signal output apparatus 12, the signal that the single-chip microcomputer that signal output apparatus 12 can be exported exports, and exports external unit to.Meanwhile, signaling interface 15 can be used as the interface of signal input and output gas analyte sensors.
Optionally, signaling interface 15 can arrange water joint, avoids entering of on-the-spot dust.
The gas analysis sensor that the utility model embodiment provides can realize the detection to gaseous tension, is provided in gaseous tension when rising to a certain degree, to the mechanism that thermal conductivity gas sensor is protected; Meanwhile, gas analysis sensor also has and regulates the flow of the gas entering air chamber, the gas in air chamber is carried out to the functions such as heated at constant temperature adjustment.
The workflow of the gas analysis sensor that the utility model embodiment provides can be as follows:
Switch on power, start sensor;
Single-chip Controlling temperature control circuit works, and heater element enters heated condition, and when the temperature of temperature sensor senses air chamber rises to design temperature, single-chip microcomputer, by temperature control circuit control heater part, makes air chamber keep temperature constant;
After air chamber temperature reaches requirement, Single-chip Controlling Thermal Conductivity element enters duty, Thermal Conductivity element detects setting gas (as the hydrogen) content in mixed gas, and signal acquisition circuit gathers the signal that Thermal Conductivity element detects, and exports single-chip microcomputer to;
Detected signal is exported by signal output apparatus and signaling interface by single-chip microcomputer.
Meanwhile, in the course of the work, single-chip microcomputer can obtain the pressure of the gas in air chamber that pressure detecting element detects, and when the force value detected is greater than threshold value, single-chip microcomputer can disconnect the working power of gas analysis sensor, to protect gas analysis sensor.
Some technical parameters that the following shows the gas analysis sensor that some the utility model embodiments provide can carry out reference:
Technical indicator
| Measurement range | 0-100Vol％ |
| Measuring accuracy under normal pressure | Relative measurement error < 1% |
| Gas flow | 20-80l/h |
| The maximum gas pressure allowed | 5bar |
| The maximum gas temperature allowed | 85℃ |
| Response time | 50ms |
Machine Design parameter
| Size | Cylindrical, structure φ 80*80 |
| Weight | 200g |
| Material | 316 stainless steels |
| Air inlet/outlet | G1/8 internal thread |
| Pressure sensor interface | G1/4 internal thread |
Electrical design parameter
| Degree of protection | IP58 |
| Supply voltage | ±12V |
| Measure heating unit | 10W |
| Pilot lamp signal | Heating period and display when reporting an error |
Signal output parameter
| Direct voltage output | 0-2V |
| DC current exports (apolegamy) | 4-20mV |
| Running environment | 0-50 DEG C, relative humidity < 80% |
| Storage environment | -20-60 DEG C, relative humidity < 95% |
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a gas analysis sensor, is characterized in that, comprising:
Housing;
Be arranged in described housing, hold the air chamber of mixed gas;
Be arranged at the pressure detection interface in described housing;
Be installed on described pressure detection interface, to the pressure detecting element that the pressure of the gas in described air chamber detects;
Be arranged in described housing, be connected with described pressure detecting element, obtain the force value that pressure detecting element detects, when the force value that described pressure detecting element detects is greater than threshold value, disconnect the single-chip microcomputer of the working power of gas analysis sensor.
2. gas analysis sensor according to claim 1, is characterized in that, also comprises:
Be arranged in described housing, to the flow regulation interface that the flow velocity of the mixed gas entering air chamber regulates.
3. gas analysis sensor according to claim 1 and 2, is characterized in that, also comprises:
Be arranged in described housing, to the heater element that the mixed gas of gas chambers contain heats.
4. gas analysis sensor according to claim 3, is characterized in that, described heater element comprises:
Be wrapped in the heater strip on the pedestal of the aluminum of described air chamber.
5. gas analysis sensor according to claim 3, is characterized in that, also comprises:
Be arranged in described housing, to the Thermal Conductivity element that the setting gas content in described mixed gas detects;
Be arranged in described housing, be connected with described single-chip microcomputer, the temperature of described air chamber is detected, and the temperature of detection is passed to the temperature sensor of described single-chip microcomputer.
6. gas analysis sensor according to claim 5, is characterized in that, also comprises:
Be arranged in described housing, for installing the first PCB of described Thermal Conductivity element and described temperature sensor.
7. gas analysis sensor according to claim 5, is characterized in that, also comprises:
Be arranged in described housing, be connected with described heater element with described single-chip microcomputer respectively, under the control of described single-chip microcomputer, control the work of described heater element, with the temperature control circuit making the temperature of described air chamber maintain design temperature scope;
Be arranged in described housing, respectively with described Thermal Conductivity element, described pressure detecting element is connected with described single-chip microcomputer, the voltage signal of the expression of described Thermal Conductivity element testing setting gas content is carried out amplification filtering, the signal converting setting to inputs described single-chip microcomputer, and the voltage signal of the pressure of the expression gas to be detected by described pressure detecting element carries out amplification filtering, converts the signal of setting to, inputs the signal acquisition circuit of described single-chip microcomputer;
Be arranged in described housing, be connected with described single-chip microcomputer, the signal that single-chip microcomputer exports is carried out the signal output apparatus exported.
8. gas analysis sensor according to claim 7, is characterized in that, also comprises:
Be arranged in described housing, for installing described single-chip microcomputer, described temperature control circuit, described signal acquisition circuit, and the second PCB of described signal output apparatus.
9. the gas analysis sensor according to claim 7 or 8, is characterized in that, also comprises:
The signaling interface be connected with described signal output apparatus.
10. gas analysis sensor according to claim 9, is characterized in that, described signaling interface is provided with water joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420636164.9U CN204228687U (en) | 2014-10-29 | 2014-10-29 | A kind of gas analysis sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420636164.9U CN204228687U (en) | 2014-10-29 | 2014-10-29 | A kind of gas analysis sensor |
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| Publication Number | Publication Date |
|---|---|
| CN204228687U true CN204228687U (en) | 2015-03-25 |
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| CN201420636164.9U Active CN204228687U (en) | 2014-10-29 | 2014-10-29 | A kind of gas analysis sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547579A (en) * | 2015-11-30 | 2016-05-04 | 蚌埠大洋传感系统工程有限公司 | Transmitter with explosion-proof function |
| CN108680528A (en) * | 2018-05-18 | 2018-10-19 | 湖南镭目科技有限公司 | A kind of gas diffusion analytical equipment |
| CN110412070A (en) * | 2019-08-20 | 2019-11-05 | 重庆川仪分析仪器有限公司 | Online catharometer |
-
2014
- 2014-10-29 CN CN201420636164.9U patent/CN204228687U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547579A (en) * | 2015-11-30 | 2016-05-04 | 蚌埠大洋传感系统工程有限公司 | Transmitter with explosion-proof function |
| CN108680528A (en) * | 2018-05-18 | 2018-10-19 | 湖南镭目科技有限公司 | A kind of gas diffusion analytical equipment |
| CN108680528B (en) * | 2018-05-18 | 2020-10-02 | 湖南镭目科技有限公司 | Gas diffusion analysis device |
| CN110412070A (en) * | 2019-08-20 | 2019-11-05 | 重庆川仪分析仪器有限公司 | Online catharometer |
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