CN213715108U - Methane gas concentration monitoring device - Google Patents
Methane gas concentration monitoring device Download PDFInfo
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- CN213715108U CN213715108U CN202022592255.5U CN202022592255U CN213715108U CN 213715108 U CN213715108 U CN 213715108U CN 202022592255 U CN202022592255 U CN 202022592255U CN 213715108 U CN213715108 U CN 213715108U
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Abstract
The utility model relates to a gas concentration monitoring technology field specifically discloses a methane gas concentration monitoring devices, wherein, include: the temperature monitoring device comprises a main controller, a temperature monitoring circuit and a probe detection module, wherein the probe detection module and the temperature monitoring circuit are connected with the main controller; the temperature monitoring circuit is used for monitoring the current environment temperature in real time and sending the monitored current environment temperature to the main controller; the probe detection module is used for detecting the voltage change of the methane probe and sending the detected current voltage value to the main controller; and the main controller is used for calculating the current concentration value of the methane gas according to the current environment temperature and the voltage value. The utility model provides a methane gas concentration monitoring devices can effectively satisfy methane gas alarm's long-term operation requirement, and can realize methane gas's multiple concentration output, has compact structure, and application scope is wide and with low costs, safe and reliable's advantage.
Description
Technical Field
The utility model relates to a gas concentration monitoring technology field especially relates to a methane gas concentration monitoring devices.
Background
At present, along with the continuous improvement of scientific technology, the residential community gradually develops towards the direction of intellectualization and digitization, and in recent years, the methane gas alarm is more and more applied to the residential community. At present, the inside of the gas alarm is complete integrated into one piece, or the traditional semiconductor type methane gas monitoring device who adopts, has the characteristics of detecting gas concentration singleness, can not realize the output of the multiple concentration of methane gas, is difficult to satisfy the requirement of the multi-functional use of present alarm.
Disclosure of Invention
The utility model provides a methane gas concentration monitoring devices solves the problem that exists can not satisfy the long-term operation requirement of methane gas alarm among the correlation technique.
As an aspect of the utility model, a methane gas concentration monitoring device is provided, wherein, include: the temperature monitoring device comprises a main controller, a temperature monitoring circuit and a probe detection module, wherein the probe detection module and the temperature monitoring circuit are connected with the main controller;
the temperature monitoring circuit is used for monitoring the current environment temperature in real time and sending the monitored current environment temperature to the main controller;
the probe detection module is used for detecting the voltage change of the methane probe and sending the detected current voltage value to the main controller;
and the main controller is used for calculating the current concentration value of the methane gas according to the current environment temperature and the voltage value.
Further, the probe detection module includes: the probe voltage division circuit is connected with the methane probe and is electrically connected with the main controller;
the methane probe is used for detecting the concentration of methane gas and can generate the change of the resistance value when the concentration of the methane gas changes;
the probe voltage division circuit can generate voltage change according to the change of the resistance value and sends the current voltage value to the main controller.
Furthermore, the probe detection module further comprises a probe detection circuit, the probe detection circuit is respectively connected with the methane probe and the main controller, the probe detection circuit is used for detecting a working voltage value when the methane probe is heated, and the main controller can judge whether the methane probe is damaged according to the working voltage value.
Further, the methane probe comprises a semiconductor type methane gas sensor
Further, the methane gas concentration monitoring device further comprises a power circuit, wherein the power circuit is respectively connected with the temperature monitoring circuit, the main controller and the probe detection module, and the power circuit is used for respectively supplying power to the temperature monitoring circuit, the main controller and the probe detection module.
Further, the methane gas concentration monitoring device also comprises an output interface, the output interface is in communication connection with the main controller, and the output interface is used for outputting the current concentration value of the methane gas calculated by the main controller.
Further, the temperature monitoring circuit includes a thermistor or a temperature sensor.
Further, the main controller comprises a single chip microcomputer.
The utility model provides a methane gas concentration monitoring devices can obtain the corresponding relation picture of resistance and concentration through demarcating in advance methane gas concentration under standard environment, then real-time supervision ambient temperature to when the detection concentration of methane probe changes, arouse the voltage variation, combine the corresponding relation of current temperature value inquiry resistance and concentration according to current voltage value, obtain the actual detection concentration value of methane probe. The methane gas concentration monitoring device can effectively meet the long-term use requirement of the methane gas alarm, can realize the output of various concentrations of methane gas, and has the advantages of compact structure, wide application range, low cost, safety and reliability.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a block diagram of the methane gas concentration monitoring device provided by the present invention.
Fig. 2 is a schematic circuit diagram of the probe detection circuit provided by the present invention.
Fig. 3 is a schematic circuit diagram of the probe voltage dividing circuit provided by the present invention.
Fig. 4 is a flow chart of a specific implementation process of the methane gas concentration monitoring device provided by the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances for purposes of describing the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this embodiment, a methane gas concentration monitoring device is provided, fig. 1 is a structural block diagram of a methane gas concentration monitoring device provided according to an embodiment of the present invention, as shown in fig. 1, including: the temperature monitoring device comprises a main controller 1, a temperature monitoring circuit 3 and a probe detection module, wherein the probe detection module and the temperature monitoring circuit 3 are connected with the main controller;
the temperature monitoring circuit 3 is used for monitoring the current environment temperature in real time and sending the monitored current environment temperature to the main controller;
the probe detection module is used for detecting the voltage change of the methane probe and sending the detected current voltage value to the main controller;
the main controller 1 is configured to calculate a current concentration value of the methane gas according to the current ambient temperature and the voltage value.
The embodiment of the utility model provides a methane gas concentration monitoring devices can obtain the corresponding relation picture of resistance and concentration through demarcating in advance methane gas concentration under standard environment, then real-time supervision ambient temperature to when the detection concentration of methane probe changes, arouse the voltage variation, combine the corresponding relation of current temperature value inquiry resistance and concentration according to current voltage value, obtain the actual detection concentration value of methane probe. The methane gas concentration monitoring device can effectively meet the long-term use requirement of the methane gas alarm, can realize the output of various concentrations of methane gas, and has the advantages of compact structure, wide application range, low cost, safety and reliability.
It should be understood that, before the calculation of the current concentration of the methane gas, calibration of a standard concentration is performed, that is, a corresponding relation graph of the internal resistance of the methane probe and the concentration of the methane gas is obtained by calibration at a standard ambient temperature.
After a corresponding relation graph of the internal resistance of the methane probe and the concentration of methane gas is obtained through calibration, the change of voltage is detected through the probe detection module, the current voltage value is fed back to the main controller, the main controller can obtain a resistance value according to the reverse deduction of the current voltage value, the resistance value is calibrated through the monitored current environment temperature, and the calibrated resistance value is compared with the corresponding relation graph of the internal resistance of the methane probe and the concentration of methane gas to obtain the current concentration of methane gas.
Specifically, the probe detection module includes: the methane probe comprises a probe voltage division circuit 4 and a methane probe 3, wherein the probe voltage division circuit 4 is connected with the methane probe 3, and the probe voltage division circuit 4 is electrically connected with the main controller 1;
the methane probe 3 is used for detecting the concentration of methane gas and can generate the change of resistance value when the concentration of methane gas changes;
the probe voltage division circuit 4 can generate voltage change according to the change of the resistance value and send the current voltage value to the main controller.
Specifically, probe detection module still includes probe detection circuitry 7, probe detection circuitry 7 respectively with methane probe 2 and main control unit 1 is connected, probe detection circuitry 7 is used for detecting operating voltage value when methane probe 2 heats, main control unit 1 can be based on operating voltage value judges whether methane probe 2 takes place to damage.
It should be understood that when the concentration of methane gas changes, the resistance value of the methane probe 2 changes, the probe voltage dividing circuit 4 connected with the methane probe 2 changes voltage, the main controller 1 monitors the change of the voltage of the probe voltage dividing circuit 4, the current temperature value is obtained through the temperature monitoring circuit 3, and the main controller 1 obtains the current concentration value through calculation according to the change of the voltage of the probe voltage dividing circuit 4 and the temperature value obtained by the temperature monitoring circuit 3.
In order to determine whether the methane probe is damaged, the damage of the semiconductor methane probe 2 can be detected by the probe detection circuit 7. The probe detection circuit 7 controls the on-off of the probe heating circuit through the MOS tube, and then reads a voltage value to judge whether the heating resistor in the methane probe 2 is burnt out.
Fig. 2 shows a schematic circuit diagram of the probe detection circuit 7, and fig. 3 shows a schematic circuit diagram of the probe voltage divider circuit 4.
It should be understood that a plurality of resistors with different resistance values are arranged in the probe voltage dividing circuit 4, which can adapt to different accuracies, so that any one of the resistors can be selected according to needs.
In some embodiments, the methane probe 2 comprises a semiconductor-type methane gas sensor.
In particular, the semiconductor methane probe may be a TGS2619 methane sensor.
Specifically, methane gas concentration monitoring devices still includes power supply circuit 5, power supply circuit 5 respectively with temperature monitoring circuit 3, main control unit 1 with probe detection module electricity is connected, power supply circuit 5 is used for do respectively temperature monitoring circuit 3, main control unit 1 with probe detection module provides the power supply.
The power supply circuit 5 may output the required voltage through the LDO device or the DC-DC chip circuit, and the main controller 1 may output the PWM heating voltage by outputting the PWM control MOS transistor, but is not limited to the above implementation. And in particular are well known to those skilled in the art, and will not be described further herein.
In some embodiments, the methane gas concentration monitoring device further includes an output interface 6, the output interface 6 is in communication connection with the main controller 1, and the output interface 6 is configured to output the current concentration value of the methane gas calculated by the main controller.
It should be noted that the output interface 6 may be a UART, USART, SPI, IIC, or other common communication methods, but is not limited to the above.
In some embodiments, the temperature monitoring circuit 3 comprises a thermistor or a temperature sensor.
In some embodiments, the master controller 1 comprises a single chip microcomputer.
It should be understood that the main controller 1 may be a 51-chip microcomputer, an STM 8-chip microcomputer, an MSP 430-chip microcomputer, etc., which are commonly used in the art, but are not limited to the above, and are specifically known in the art.
The specific working process of the methane gas concentration monitoring device provided by the embodiment of the present invention is described in detail with reference to fig. 4.
When the concentration of methane gas changes, the resistance value of the semiconductor type methane probe 2 changes, the probe voltage division circuit 4 connected with the semiconductor type methane probe 2 can generate voltage change, the main controller 1 monitors the voltage change of the probe voltage division circuit 4, the current temperature value is obtained through the temperature monitoring circuit 3, and the main controller 1 obtains the current concentration value through calculation according to the voltage change of the probe voltage division circuit 4 and the concentration value obtained by the temperature monitoring circuit 3. The sequence of obtaining the change of the voltage value and obtaining the change of the temperature value can be changed; main control unit 1 also can be after obtaining the 4 voltage changes of probe bleeder circuit, adds the voltage change and converts into resistance change, and the temperature value that combines again obtains concentration value, and this kind of mode is in the utility model discloses the structural range, but not limited to this a mode specifically is known for this technical field personnel, and it is no longer repeated here.
The utility model discloses support the output of concrete methane gas concentration, output range can be between 0% LEL to 25% LEL concentration, reaches different demarcation alarm threshold value execution different alarm modes and links other safety equipment elimination dangerous characteristics under the multiple concentration of the alarm of being convenient for. The concentration ranges may vary and are within the scope of the present invention.
The methane gas concentration monitoring module of the semiconductor gas probe can select a plurality of concentration values to calibrate so as to obtain more accurate data and improve the reliability. The probe is placed in the gas with the calibrated concentration, after the probe is stabilized for a period of time, the main controller MCU1 obtains the voltage value under the current concentration through the probe voltage division circuit 4 and calculates the resistance value, and the resistance value is stored as reference data. For example, the methane calibration value concentration may be selected from 5% LEL, 10% LEL, and 15% LEL, but is not limited to one or more of the above, and is within the scope of the present invention.
To sum up, the utility model provides a methane gas concentration monitoring devices can satisfy and reach different demarcation alarm threshold value under the multiple concentration of alarm and carry out different alarm modes and link other safety equipment and eliminate dangerous needs, conveniently independently mark, realizes the inside alarm device of alarm and concentration monitoring devices's separation, and equipment is reliable to be ensured, and system design compact structure can effectively satisfy the long-term operation requirement of alarm equipment, and accommodation is wide, reduces use cost, safe and reliable.
It is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (8)
1. A methane gas concentration monitoring device, comprising: the temperature monitoring device comprises a main controller, a temperature monitoring circuit and a probe detection module, wherein the probe detection module and the temperature monitoring circuit are connected with the main controller;
the temperature monitoring circuit is used for monitoring the current environment temperature in real time and sending the monitored current environment temperature to the main controller;
the probe detection module is used for detecting the voltage change of the methane probe and sending the detected current voltage value to the main controller;
and the main controller is used for calculating the current concentration value of the methane gas according to the current environment temperature and the voltage value.
2. The methane gas concentration monitoring device according to claim 1, wherein the probe detection module comprises: the probe voltage division circuit is connected with the methane probe and is electrically connected with the main controller;
the methane probe is used for detecting the concentration of methane gas and can generate the change of the resistance value when the concentration of the methane gas changes;
the probe voltage division circuit can generate voltage change according to the change of the resistance value and sends the current voltage value to the main controller.
3. The methane gas concentration monitoring device according to claim 2, wherein the probe detection module further comprises a probe detection circuit, the probe detection circuit is respectively connected with the methane probe and the main controller, the probe detection circuit is used for detecting a working voltage value when the methane probe is heated, and the main controller can judge whether the methane probe is damaged according to the working voltage value.
4. The methane gas concentration monitoring device according to claim 2, wherein the methane probe comprises a semiconductor-type methane gas sensor.
5. A methane gas concentration monitoring device according to any one of claims 1 to 4, further comprising a power supply circuit, said power supply circuit being electrically connected to said temperature monitoring circuit, said main controller and said probe detection module, respectively, said power supply circuit being configured to provide power supply to said temperature monitoring circuit, said main controller and said probe detection module, respectively.
6. A methane gas concentration monitoring device according to any one of claims 1 to 4, further comprising an output interface, wherein the output interface is communicatively connected to the main controller, and is configured to output the current concentration value of methane gas calculated by the main controller.
7. The methane gas concentration monitoring device according to claim 1, wherein the temperature monitoring circuit includes a thermistor or a temperature sensor.
8. The methane gas concentration monitoring device of claim 1, wherein the master controller comprises a single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022592255.5U CN213715108U (en) | 2020-11-11 | 2020-11-11 | Methane gas concentration monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022592255.5U CN213715108U (en) | 2020-11-11 | 2020-11-11 | Methane gas concentration monitoring device |
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| Publication Number | Publication Date |
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| CN213715108U true CN213715108U (en) | 2021-07-16 |
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| CN202022592255.5U Active CN213715108U (en) | 2020-11-11 | 2020-11-11 | Methane gas concentration monitoring device |
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