CN219284586U - Industrial gas leakage alarm device - Google Patents
Industrial gas leakage alarm device Download PDFInfo
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- CN219284586U CN219284586U CN202222166657.8U CN202222166657U CN219284586U CN 219284586 U CN219284586 U CN 219284586U CN 202222166657 U CN202222166657 U CN 202222166657U CN 219284586 U CN219284586 U CN 219284586U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The utility model discloses an industrial gas leakage alarm device, which comprises a gas detection unit and an alarm unit, wherein the gas detection unit comprises a gas sensor, detection signals of the gas sensor are sequentially processed by a filtering amplifying circuit and a compensation steady flow circuit and then are sent into an A/D converter, and the alarm unit comprises a controller and an alarm, wherein the controller is connected with the A/D converter through a data serial port.
Description
Technical Field
The utility model relates to the technical field of gas safety monitoring, in particular to an industrial gas leakage alarm device.
Background
The fuel gas is used as clean energy to bring convenience to people and reduce environmental pollution, but also bring potential danger to people. The gas leakage is a main dangerous source, and if the valve, the connecting hose, the pipeline joint and the using equipment are damaged or sealed incompletely in the using process of the fuel, leakage occurs, poisoning can be caused by a light person, fire or explosion is caused by a heavy person, and life and property safety of people is threatened. However, in the space with complex environments such as industrial production, the instability of the air flow and the external environment temperature can cause unstable signals and fluctuation of the gas in the detection process, so that errors occur in the detection result, and potential safety hazards exist in the gas leakage monitoring system.
The present utility model provides a new solution to this problem.
Disclosure of Invention
In view of the above, the present utility model aims to overcome the defects of the prior art and provide an industrial gas leakage alarm device.
The technical scheme for solving the problems is as follows: the utility model provides an industrial gas leakage alarm device, includes gas detecting element and alarm unit, gas detecting element includes gas sensor, gas sensor's detected signal sends into the AD converter after filtering amplifying circuit and compensation stationary flow circuit handle in proper order, alarm unit includes controller and alarm, the controller passes through the data serial ports connection the AD converter.
Preferably, the filtering amplifying circuit includes an inductor L1, one end of the inductor L1 is connected to the signal output end of the gas sensor, the other end of the inductor L1 is grounded through a resistor R1 and a capacitor C1 connected in parallel, and the in-phase input end of the operational amplifier AR1 and one end of the capacitor C2 are connected through a resistor R2, the inverting input end of the operational amplifier AR1 is connected with one end of a resistor R3, a resistor R4, a resistor R5 and the other end of the capacitor C2, the other end of the resistor R4 is connected with one end of the capacitor C4, the other end of the resistor R5 is grounded through the capacitor C3, and the other ends of the resistor R3 and the capacitor C4 are connected with the output end of the operational amplifier AR 1.
Preferably, the compensation current stabilizing circuit comprises an operational amplifier AR2, wherein the non-inverting input end of the operational amplifier AR2 is connected with the output end of the operational amplifier AR1, the non-inverting input end of the operational amplifier AR2 is connected with the drain electrode of the MOS tube Q1 through a resistor R6 and a capacitor C5 which are connected in parallel, the output end of the operational amplifier AR2 is connected with the grid electrode of the MOS tube Q1, and the source electrode of the MOS tube Q1 is connected with the inverting input end of the operational amplifier AR2 and the A/D converter and is grounded through a resistor R7 and a capacitor C6 which are connected in parallel.
Preferably, the gas sensor is an MQ-4 gas detection sensor.
Through the technical scheme, the utility model has the beneficial effects that: the utility model effectively avoids the disturbance of the instability of the air flow and the external temperature to the detection signal, improves the stability and the accuracy of the detection signal, and ensures the operation reliability of the industrial gas leakage alarm device.
Drawings
Fig. 1 is a schematic diagram of a filter amplifier circuit according to the present utility model.
FIG. 2 is a schematic diagram of a compensation current stabilizing circuit according to the present utility model.
Detailed Description
The foregoing and other features, aspects and advantages of the present utility model will become more apparent from the following detailed description of the embodiments, which proceeds with reference to the accompanying figures 1-2. The following embodiments are described in detail with reference to the drawings.
Exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.
The industrial gas leakage alarm device comprises a gas detection unit and an alarm unit, wherein the gas detection unit comprises a gas sensor, detection signals of the gas sensor are sequentially processed by a filtering amplifying circuit and a compensation current stabilizing circuit and then are sent into an A/D converter, the alarm unit comprises a controller and an alarm, and the controller is connected with the A/D converter through a data serial port.
As shown in fig. 1, the filtering and amplifying circuit includes an inductor L1, one end of the inductor L1 is connected to the signal output end of the gas sensor, the other end of the inductor L1 is grounded through a resistor R1 and a capacitor C1 connected in parallel, and connected to the in-phase input end of the operational amplifier AR1 and one end of the capacitor C2 through a resistor R2, the inverting input end of the operational amplifier AR1 is connected to one end of the resistors R3, R4, R5 and the other end of the capacitor C2, the other end of the resistor R4 is connected to one end of the capacitor C4, the other end of the resistor R5 is grounded through the capacitor C3, and the other ends of the resistor R3 and the capacitor C4 are connected to the output end of the operational amplifier AR 1.
As shown in fig. 2, the compensation current stabilizing circuit includes an operational amplifier AR2, wherein the non-inverting input end of the operational amplifier AR2 is connected to the output end of the operational amplifier AR1, and is connected to the drain electrode of the MOS transistor Q1 through a parallel resistor R6 and a capacitor C5, the output end of the operational amplifier AR2 is connected to the gate electrode of the MOS transistor Q1, and the source electrode of the MOS transistor Q1 is connected to the inverting input end of the operational amplifier AR2 and the a/D converter, and is grounded through a parallel resistor R7 and a capacitor C6.
When the utility model is particularly used, the gas sensor selects the MQ-4 gas detection sensor to detect the concentration of gas in the space which is likely to leak, and converts the gas concentration into an electric signal to be output; in order to ensure the detection effectiveness, the output signal of the gas sensor is processed by adopting a filtering amplifying circuit, wherein an LC filter is formed by an inductor L1 and a capacitor C1 to carry out low-pass filtering on the detection signal, so that high-frequency clutter caused by the interference of external mechanical noise is effectively eliminated, and then the detection signal is sent into an operational amplifier AR1 to be amplified. In the working process of the operational amplifier AR1, the resistance-capacitance element at the negative feedback end plays a role in compensation, so that unstable signals caused by external factors are effectively avoided, and the continuous stability of signal output is improved. The capacitor C3 also plays a role in eliminating thermal noise on the operational amplifier AR1, and ensures operational accuracy of the operational amplifier.
The operational amplifier AR2 and the MOS tube Q1 in the compensation steady flow circuit form a constant current source circuit to conduct steady flow treatment on the output signal of the operational amplifier AR1, the stability of the output of the detection signal is greatly improved, the capacitor C5 plays a role in phase adjustment in the working process of the operational amplifier AR2, the waveform of the output signal is improved, the output signal is finally filtered by the capacitor C6 and then is sent to an A/D converter, and the A/D converter converts the detection signal into digital quantity and then is sent to a controller.
The controller processes the received digital quantity detection signals and then calculates the real-time gas concentration in the detection space, and when the gas concentration exceeds the safety threshold range set by the system, the controller drives the alarm to perform early warning so as to remind workers of gas leakage. The utility model effectively avoids the disturbance of the instability of the air flow and the external temperature to the detection signal, improves the stability and the accuracy of the detection signal, and ensures the operation reliability of the industrial gas leakage alarm device.
While the utility model has been described in connection with certain embodiments, it is not intended that the utility model be limited thereto; for those skilled in the art to which the present utility model pertains and the related art, on the premise of based on the technical scheme of the present utility model, the expansion, the operation method and the data replacement should all fall within the protection scope of the present utility model.
Claims (3)
1. The utility model provides an industrial gas leakage alarm device, includes gas detecting element and alarm unit, its characterized in that: the gas detection unit comprises a gas sensor, detection signals of the gas sensor are sequentially processed by a filtering amplifying circuit and a compensation current stabilizing circuit and then are sent into the A/D converter, the alarm unit comprises a controller and an alarm, and the controller is connected with the A/D converter through a data serial port;
the filtering amplifying circuit comprises an inductor L1, one end of the inductor L1 is connected with a signal output end of the gas sensor, the other end of the inductor L1 is grounded through a resistor R1 and a capacitor C1 which are connected in parallel, the same-phase input end of the operational amplifier AR1 and one end of the capacitor C2 are connected through a resistor R2, the opposite-phase input end of the operational amplifier AR1 is connected with one end of a resistor R3, one end of a resistor R4 and one end of a resistor R5 and the other end of the capacitor C2, the other end of the resistor R4 is connected with one end of the capacitor C4, the other end of the resistor R5 is grounded through the capacitor C3, and the other ends of the resistor R3 and the capacitor C4 are connected with the output end of the operational amplifier AR 1.
2. The industrial gas leakage alarm device according to claim 1, wherein: the compensation current stabilizing circuit comprises an operational amplifier AR2, wherein the non-inverting input end of the operational amplifier AR2 is connected with the output end of an operational amplifier AR1, the non-inverting input end of the operational amplifier AR2 is connected with the drain electrode of a MOS tube Q1 through a resistor R6 and a capacitor C5 which are connected in parallel, the output end of the operational amplifier AR2 is connected with the grid electrode of the MOS tube Q1, and the source electrode of the MOS tube Q1 is connected with the inverting input end of the operational amplifier AR2 and the A/D converter and is grounded through a resistor R7 and a capacitor C6 which are connected in parallel.
3. The industrial gas leakage alarm device according to claim 2, wherein: the gas sensor is an MQ-4 gas detection sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222166657.8U CN219284586U (en) | 2022-08-17 | 2022-08-17 | Industrial gas leakage alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222166657.8U CN219284586U (en) | 2022-08-17 | 2022-08-17 | Industrial gas leakage alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219284586U true CN219284586U (en) | 2023-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222166657.8U Active CN219284586U (en) | 2022-08-17 | 2022-08-17 | Industrial gas leakage alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219284586U (en) |
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2022
- 2022-08-17 CN CN202222166657.8U patent/CN219284586U/en active Active
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