CN117517407A - Gas detector detection system and detection method - Google Patents
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- CN117517407A CN117517407A CN202311510852.0A CN202311510852A CN117517407A CN 117517407 A CN117517407 A CN 117517407A CN 202311510852 A CN202311510852 A CN 202311510852A CN 117517407 A CN117517407 A CN 117517407A
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- 238000001514 detection method Methods 0.000 title claims abstract description 125
- 238000002485 combustion reaction Methods 0.000 claims abstract description 33
- 239000004065 semiconductor Substances 0.000 claims abstract description 26
- 238000004891 communication Methods 0.000 claims abstract description 19
- 230000000007 visual effect Effects 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims description 174
- 238000005259 measurement Methods 0.000 claims description 21
- 238000005070 sampling Methods 0.000 claims description 7
- 239000000567 combustion gas Substances 0.000 claims description 5
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- 239000002737 fuel gas Substances 0.000 description 3
- 231100000572 poisoning Toxicity 0.000 description 3
- 230000000607 poisoning effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
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- 230000004044 response Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
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- 230000007613 environmental effect Effects 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
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Abstract
The invention relates to a gas detector detection system and a detection method, comprising a main control module, a gas sensor detection module for detecting gas concentration, an NB wireless communication module in wireless communication with the gas sensor detection module, a relay output control module, an infrared key receiving module and an audible and visual alarm module; the gas detector detection system and the detection method are simple, the semiconductor type gas sensor and the contact combustion type gas sensor can be matched for use according to the setting of the use scene, different modes are set according to different use scenes, after the preset timing detection time expires, the contact combustion type gas sensor can be automatically started in holidays or rest time, and the safety of personnel is guaranteed and the service life of the sensor is prolonged due to the matched use of the two sensors.
Description
Technical Field
The invention relates to the technical field of gas detection, in particular to a gas detector detection system and a detection method.
Background
With the rapid development of economy and science and technology, the density of urban personnel is continuously improved, the application range of fuel gas is wider and wider, and the frequent occurrence of combustion and explosion caused by fuel gas leakage or personnel poisoning caused by insufficient combustion is caused; the existing use method of the double-sensor used product in the market is that the semiconductor sensor is firstly used, and then the contact combustion type gas sensor module is manually started (not operated at ordinary times) when the gas concentration is increased, so that the service life of the sensor is prolonged, the defect that the sensor should be used is that the safety of personnel cannot be timely ensured, and certain preheating time is needed for the operation of the sensor.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a gas detector detection system and a detection method.
On one hand, the technical scheme adopted by the invention for solving the technical problems is as follows: the gas detector detection system comprises a main control module, a gas sensor detection module for detecting gas concentration, an NB wireless communication module in wireless communication with the gas sensor detection module, a relay output control module, an infrared key receiving module and an audible and visual alarm module; the gas sensor detection module, the NB wireless communication module, the relay output control module, the infrared key receiving module and the audible and visual alarm module are all electrically connected with the main control module; the gas sensor detection module comprises a semiconductor type gas sensor, a contact combustion type gas sensor, a switching controller for controlling the semiconductor type gas sensor or the contact combustion type gas sensor to be automatically opened or closed, and a timing detection module connected with the switching controller; the timing detection module can be set into various scene modes through the NB wireless module; the switching controller switches the semiconductor type gas sensor and/or the contact combustion type gas sensor to work according to different scene modes;
the gas detector detection system provided by the invention further comprises an LED digital display module for displaying the concentration of target gas and a state LED indication module for displaying the use state of the semiconductor type gas sensor and the use state of the contact combustion type gas sensor; the LED digital display module and the state LED indication module are electrically connected with the main control module;
the invention relates to a gas detector detection system, wherein the contact combustion type gas sensor comprises a gas detection unit and a gas compensation unit; the gas detection unit is used for detecting whether the combustible gas exists or not and measuring the concentration of the combustible gas; the gas compensation unit is used for correcting and compensating the measurement result of the gas detection unit;
the invention relates to a gas detector detection system, wherein a gas compensation unit comprises a temperature compensation module, a humidity compensation module, a gas pressure compensation module and a cross interference compensation module;
the gas detector detection system of the invention, wherein the scene modes comprise enterprise units and education modes, factory modes, restaurant modes and residence modes;
the gas detector detection system provided by the invention is characterized in that the detection period interval of the timing detection module can be set according to the number of days or weeks or months, and the timing detection time parameter can be remotely set through the NB wireless communication module;
the invention relates to a gas detector detection system, wherein an audible and visual alarm module comprises a buzzer and an alarm lamp;
the gas detector detection system provided by the invention is characterized in that the first working current of the buzzer is converted into a first output voltage through a first resistor; the first output voltage is amplified by a first amplifier and then connected to a first input pin of the main control module for sampling operation;
the gas detector detection system provided by the invention is characterized in that the second working current of the alarm lamp is converted into a second output voltage through a second resistor; the second output voltage is amplified by a second amplifier and then connected to a second input pin of the main control module for sampling operation;
in another aspect, the present invention further provides a gas detection method, using the gas detector detection system as described in any one of the above, wherein the gas detection method includes the following steps:
starting a semiconductor gas sensor, and setting timing detection time corresponding to the current scene on a timing detection module according to the use scene;
when the timing detection time is reached, the switching controller automatically starts the contact combustion type gas sensor, whether the combustible gas leaks in the current place or not is detected in real time through the contact combustion type gas sensor, and if the combustible gas is detected, the audible and visual alarm module is triggered to work so as to remind workers.
The invention has the beneficial effects that: the gas detector detection system and the detection method are simple, the semiconductor type gas sensor and the contact combustion type gas sensor can be matched for use according to the setting of the use scene, different modes are set according to different use scenes, after the preset timing detection time expires, the contact combustion type gas sensor can be automatically started in holidays or rest time, and the safety of personnel is guaranteed and the service life of the sensor is prolonged due to the matched use of the two sensors.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, in which the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained by those skilled in the art without inventive effort:
FIG. 1 is a schematic block diagram of a gas detector detection system according to a first embodiment of the present invention;
FIG. 2 is a block diagram of a gas sensor detection block according to a first embodiment of the present invention;
FIG. 3 is a block diagram of a contact combustion gas sensor according to a first embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a master control module according to a first embodiment of the present invention;
FIG. 5 is a circuit diagram of a part of a detail interface of a main control module and a program programming according to a first embodiment of the present invention;
FIG. 6 is a partial detailed circuit diagram of a master control module for simulating serial communication according to the first embodiment of the invention;
FIG. 7 is a schematic circuit diagram of an infrared key receiving section port according to a first embodiment of the present invention;
fig. 8 is a circuit diagram of a buzzer connected to a current detection circuit according to a first embodiment of the present invention;
FIG. 9 is a circuit diagram of a connection between an alarm lamp and a current detection circuit according to a first embodiment of the present invention;
fig. 10 is a self-checking schedule of the timing detection module according to the first embodiment of the present invention.
Detailed Description
The terms "first," "second," "third," and "fourth" and the like in the description and in the claims and drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
"plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
Moreover, the terms "upper, lower, front, rear, left, right, upper end, lower end, longitudinal" and the like that represent orientations are referred to with reference to the attitude position of the apparatus or device described in this scheme when in normal use.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the following description will be made in detail with reference to the technical solutions in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present invention, based on the embodiments of the present invention.
Embodiment one:
the first embodiment of the invention provides a gas detector detection system and a detection method, as shown in fig. 1-3, comprising a main control module 11, a gas sensor detection module 12 for detecting gas concentration, an NB wireless communication module 13 in wireless communication with the gas sensor detection module 12, a relay output control module 14, an infrared key receiving module 15 and an audible and visual alarm module 16; the gas sensor detection module 12, the NB wireless communication module 13, the relay output control module 14, the infrared key receiving module 15 and the audible and visual alarm module 16 are electrically connected with the main control module 11; the gas sensor detection module 12 includes a semiconductor gas sensor 121, a contact combustion type gas sensor 122, a switching controller 123 that controls the semiconductor gas sensor 121 or the contact combustion type gas sensor 122 to be automatically turned on or off, and a timing detection module 124 connected to the switching controller 123; the timing detection module 124 can be set to various scene modes through the NB wireless module; the switching controller 123 switches the operation of the semiconductor gas sensor 121 and/or the contact combustion gas sensor 122 according to different scene modes.
The gas detector detection system and the detection method are simple, the semiconductor type gas sensor and the contact combustion type gas sensor can be matched for use according to the setting of the use scene, different modes are set according to different use scenes, after the preset timing detection time expires, the contact combustion type gas sensor can be automatically started in holidays or rest time, and the safety of personnel is guaranteed and the service life of the sensor is prolonged due to the matched use of the two sensors.
4-6, the main control module 11 adopts a chip with the model number of HC32F030J8 TA; the NB wireless communication module 13 is a wireless communication module implemented by adopting a narrowband internet of things (Narrowband Internet of Things, NB-IoT) technology, and is used for data communication between internet of things equipment and a sensor. The NB-IoT is a low power consumption wide area network (LPWAN) technology, a hardware module integrating the NB-IoT communication function is connected to an operator base station through a wireless NB-IoT, relevant service data of a product is transmitted to an operator cloud platform, the cloud platform (if a third party platform is used, the data is interacted with by the operator platform) analyzes and stores the data, and meanwhile, real-time data (alarm, fault) is transmitted to a mobile terminal of a user through a short message, a telephone, an APP and the like.
The relay output control module 14 is an output circuit for controlling the relay, and functions such as power switching and current control of external devices are realized by controlling the on-off of the relay. The module comprises a first relay output port (1A/250 VAC), a second relay output port (1A/30 VDC) and an active output port of 24V active output (output during alarm); the output port of the second relay and the active output port can only select one of the output ports, and the selection mode can be controlled by a remote controller due to the limitation of structural space.
The relay is an electromagnetic device, and the on-off of the switch is controlled by controlling the on-off of an electromagnetic coil of the relay. The relay output control module controls external equipment by controlling an electromagnetic coil of the relay. The control interface of the module may be in the form of a digital signal (e.g., a switching signal, a level signal) or an analog signal (e.g., a voltage or current signal), etc.
FIG. 7 is a schematic circuit diagram of an infrared key receiving portion port; the infrared key receiving module (Infrared Key Receiver Module) 15 is a module capable of receiving a key signal of an infrared remote controller. It is usually composed of an infrared remote controller, a decoder, an output interface, etc.
The infrared remote controller is a core component of the module, and operates the detector:
a. zero calibration of detector
b. Calibrating the detector
c. Correction of detector span coefficient
d. Low concentration alarm setting value adjustable
e. Acousto-optic self-checking function
f. And (5) silencing.
The audible and visual alarm module 16 includes a buzzer 161 and an alarm lamp 162. The audible and visual alarm module can early warn in advance, and the gas alarm can timely send out sound and light signals when gas leaks, so that people are reminded to take measures, and accidents such as fire, explosion and poisoning are prevented.
As shown in fig. 8, a circuit diagram of the connection of the buzzer and the current detection circuit is shown; the first operating current I of the buzzer 161 is converted into a first output voltage V1 through a first resistor R1; the first output voltage V1 is amplified by the first amplifier LMV358 and then connected to the first input pin ADC of the main control module 11 to perform sampling operation, and whether the current mode is normal is judged by monitoring the states of the first output voltage V1, the first operating current I and the first input pin ADC, so that maintenance cost can be reduced, and the risk degree is low. The current detection circuit is added to the power end of the buzzer, and when the buzzer is driven to sound, the current consumed by the fixed PWM driving waveform buzzer is relatively constant.
As shown in fig. 9, a circuit diagram of the connection of the alarm lamp and the current detection circuit is shown; the second working current I of the alarm lamp 162 is converted into a second output voltage V2 through a second resistor R27; the second output voltage V2 is amplified by the second amplifier LMV358 and then is connected to a second input pin ADC of the main control module 11 for sampling operation; similarly, whether the current mode is normal or not is judged by monitoring the states of the second output voltage V2, the second working current I and the second input pin ADC, so that maintenance cost can be reduced, and the risk degree is low. A current detection circuit is added to the power supply end of the alarm lamp, and when the flicker frequency of the alarm lamp is fixed, the consumed current is relatively constant in a fixed period.
The current for normal operation is 25MA, and if the detected current is greater than 30MA or less than 20MA, the circuit is considered to be faulty. At the same time, it is monitored whether the 24V voltage is within 5% of the fluctuation range, and if so, it is normal.
Further, the contact combustion type gas sensor 122 includes a gas detection unit 1221 and a gas compensation unit 1222; the gas detection unit 1221 is configured to detect the presence or absence of a combustible gas and measure the concentration of the combustible gas; the gas compensation unit 1222 is used for correcting and compensating the measurement result of the gas detection unit 1221.
The main function of the gas detection unit 1221 is to provide timely alarm and monitoring information by sensing the presence and concentration of combustible gas, which helps to protect the safety and health of personnel. The specific actions are as follows:
detecting the presence of a gas: the gas detection unit can detect the gas in the environment and rapidly and accurately judge whether the gas exists in the environment. Alternatively, by using different sensor technologies, a variety of gases may be detected, such as combustible gases, toxic gases, methane, carbon monoxide, etc.;
measuring gas concentration: the gas detection unit may measure the concentration level of the gas and provide an accurate concentration value. This is important to determine if the gas concentration exceeds safety standards, particularly in an industrial environment, where explosion, poisoning, etc. hazards can be avoided.
An alarm is sent out: the gas detection unit may emit an alarm signal, such as sound, light flashing, vibration, etc., when the detected gas concentration exceeds a preset safety threshold. In this way, personnel can be timely reminded to take corresponding safety measures, such as evacuation of dangerous areas, wearing of protective equipment and the like.
Data recording and transmission: some advanced gas detection units also have data recording and transmission functions, and can record detected gas concentration data and transmit the data to a computer or cloud platform for analysis and monitoring. This helps to monitor changes in gas concentration, analyze trends, and formulate corresponding measures.
By using the gas detection unit, the condition of the gas in the environment can be known in real time, potential danger can be found in advance, and measures can be taken in time to protect the safety and health of personnel.
The gas compensation unit 1222 is an accessory for a gas sensor, and mainly functions to correct and compensate a measurement result of the gas sensor to improve accuracy and reliability of measurement; in one embodiment, the gas compensation unit 1222 includes a temperature compensation module, a humidity compensation module, a gas pressure compensation module, and a cross-interference compensation module;
a temperature compensation module: the gas compensation unit may temperature compensate the measurement result of the gas sensor. Since the temperature change can influence the measurement response of the sensor, the influence of the temperature on the measurement result can be reduced and the measurement accuracy can be improved by compensating the influence of the temperature.
Humidity compensation module: the gas compensation unit may perform humidity compensation on the measurement result of the gas sensor. Because the humidity change also can influence the measurement response of the sensor, the influence of the humidity on the measurement result can be reduced and the measurement accuracy can be improved by compensating the influence of the humidity.
The air pressure compensation module: the gas compensation unit may perform gas pressure compensation on the measurement result of the gas sensor. In order to reduce the influence of air pressure change on the measurement result of the sensor, the influence of air pressure on the measurement result can be reduced by compensating the influence of air pressure, and the measurement accuracy is improved.
A cross interference compensation module: the gas compensation unit may compensate for cross-interference between different gases. When there are multiple gases, which may interfere with each other, the accuracy of the measurement can be improved by compensating for these cross-interference.
By using the gas compensation unit, the influence of environmental factors on the measurement result of the gas sensor can be reduced, and the measurement accuracy and reliability are improved. This is important for application scenarios where high precision gas measurements are required.
Further, the gas detector detection system further comprises an LED digital display module 17 for displaying the target gas concentration, and a status LED indication module 18 for displaying the use status of the semiconductor type gas sensor 121 and the use status of the contact combustion type gas sensor 122; the LED digital display module 17 and the status LED indication module 18 are electrically connected with the main control module 11.
The LED digital display module 17 is an LED display screen and has a fuel gas concentration display function;
the status LED indicator module 18 also has three LED indicator status lights, which are red, yellow and green, respectively. The three LED indication status lamps respectively have different indications when in operation, low report, high report, fault and network connection.
Further, the scene modes include business units and education modes, factory modes, restaurant modes, and residence modes.
During enterprise institutions and education modes such as enterprise institutions, middle and primary schools, kindergartens and the like, holiday switching modes can be set, a holiday data table can be set at the detector terminal (through periodic setting of NB modules every year), and life and property safety of people is guaranteed to the greatest extent due to high accuracy and high linearity of the contact combustion type gas sensor used in normal working days. The holiday is closed, the contact combustion type gas sensing enables the semiconductor sensor, and the semiconductor sensor is started to be preheated 4 hours before the contact combustion type gas sensing is closed, so that the maximum detection accuracy is ensured. The method can effectively prolong the service life of the contact combustion type gas sensor, especially in the use occasions of middle and primary schools and kindergartens, ensure the safety of personnel and prolong the service life of the sensor
In the factory mode, the semiconductor sensor can be set into a working time mode and a working time mode, the semiconductor sensor can be always on, and the contact combustion type gas sensor is turned on in the working time period and turned off after working. The safety of personnel is ensured, and the service life of the sensor is prolonged;
in the restaurant mode, the semiconductor sensor can be set to be in a working time mode and a working time mode, and the semiconductor sensor can be always on, and the contact combustion type gas sensor is turned on in the working time period and turned off after working. The safety of personnel is ensured, and the service life of the sensor is prolonged.
In the house mode, the semiconductor sensor can be always on-line, and the contact combustion type gas sensor is opened in the house returning time period and closed in the door returning time mode. The safety of personnel is ensured, and the service life of the sensor is prolonged. Through the detailed classification of the use scene, the safety of personnel is ensured and the service life of the sensor is prolonged.
Further, the detection period interval of the timing detection module 124 may be set according to the number of days or weeks or months, and the time parameter of the timing detection may be set remotely through the NB wireless communication module 13; as shown in fig. 10, a self-test schedule of the timing detection module 124 is shown; the detection period interval can be set according to the number of seasons, the number of weeks and the number of months, the alarm time can be accurate to the number of minutes, and the detection can be carried out under the condition of few people or no people, so that the influence on normal work and study of people is avoided.
The detection time and date of the detection period can be set, self-detection can be carried out in a period of rare personnel, and panic caused by acousto-optic follow-up of the alarm and personnel is reduced.
Description of working principle: the detection unit and the compensation unit have a resistance balance voltage of 0V when in clean air. When the combustible gas leaks, the gas enters the sensor to act with the detection unit, the detection voltage changes and becomes large, the change is amplified and filtered by the operational amplifier, and is output to the microcontroller for sampling, and the microcontroller converts the value into a concentration value through operation, displays and transmits the concentration value to the controller in real time.
The service life of the sensor is prolonged by using the scene mode setting; the setting can be set according to holiday setting or working time; the setting is flexible.
The timed detection time can be issued to the detector locally and saved by a wireless platform such as NBiot.
And setting the operation enabling time of the double sensors according to the detection scene.
When the detection time reaches the time that the local detector starts to trigger the self-checking function alarm lamp to flash, the buzzer sounds to alarm, meanwhile, the voltage and the current of the red alarm lamp are checked, whether a fault exists or not is judged, the fault state is reported if the fault exists, then the voltage and the current of the buzzer are detected, whether the fault exists or not is judged, the fault state is reported if the fault exists, and the fault state is reported if the fault does not exist, and the reporting state is normal.
Embodiment two:
a gas detection method, using the gas detector detection system according to the first embodiment, wherein the gas detection method includes the steps of:
starting the semiconductor gas sensor 121, and setting a timing detection time corresponding to the current scene on the timing detection module 124 according to the usage scene;
when the timing detection time is reached, the switching controller 123 automatically opens the contact combustion type gas sensor 122, detects whether the combustible gas leaks in the current place in real time through the contact combustion type gas sensor 122, and if the combustible gas is detected, triggers the audible and visual alarm module 16 to work so as to remind staff
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
Claims (10)
1. The gas detector detection system is characterized by comprising a main control module, a gas sensor detection module for detecting gas concentration, an NB wireless communication module in wireless communication with the gas sensor detection module, a relay output control module, an infrared key receiving module and an audible and visual alarm module; the gas sensor detection module, the NB wireless communication module, the relay output control module, the infrared key receiving module and the audible and visual alarm module are all electrically connected with the main control module; the gas sensor detection module comprises a semiconductor type gas sensor, a contact combustion type gas sensor, a switching controller for controlling the semiconductor type gas sensor or the contact combustion type gas sensor to be automatically opened or closed, and a timing detection module connected with the switching controller; the timing detection module can be set into various scene modes through the NB wireless module; the switching controller switches the semiconductor gas sensor and/or the contact combustion gas sensor to work according to different scene modes.
2. The gas detector detection system of claim 1, further comprising an LED digital display module for displaying a target gas concentration, and a status LED indication module for displaying a status of use of the semiconductor gas sensor and a status of use of the contact combustion gas sensor; the LED digital display module and the state LED indication module are electrically connected with the main control module.
3. The gas detector detection system of claim 2, wherein the contact combustion gas sensor comprises a gas detection unit and a gas compensation unit; the gas detection unit is used for detecting whether the combustible gas exists or not and measuring the concentration of the combustible gas; the gas compensation unit is used for correcting and compensating the measurement result of the gas detection unit.
4. A gas detector detection system according to claim 3, wherein the gas compensation unit comprises a temperature compensation module, a humidity compensation module, a gas pressure compensation module and a cross-interference compensation module.
5. The gas detector detection system of claim 4, wherein the scene modes include business units and education modes, factory modes, restaurant modes, and residential modes.
6. The gas detector detection system according to claim 5, wherein the detection period interval of the timing detection module can be set according to days or weeks or months, and the time parameter of the timing detection can be set remotely through the NB wireless communication module.
7. The gas detector detection system of any of claims 1-6, wherein the audible and visual alarm module comprises a buzzer and a warning light.
8. The gas detector detection system of claim 7, wherein the first operating current of the buzzer is converted to a first output voltage via a first resistor; the first output voltage is amplified by a first amplifier and then connected to a first input pin of the main control module for sampling operation.
9. The gas detector detection system of claim 8, wherein a second operating current of the alarm lamp is converted to a second output voltage via a second resistor; the second output voltage is amplified by a second amplifier and then connected to a second input pin of the main control module for sampling operation.
10. A gas detection method using the gas detector detection system according to any one of claims 1 to 9, characterized in that the gas detection method comprises the steps of:
starting a semiconductor gas sensor, and setting timing detection time corresponding to the current scene on a timing detection module according to the use scene;
when the timing detection time is reached, the switching controller automatically starts the contact combustion type gas sensor, whether the combustible gas leaks in the current place or not is detected in real time through the contact combustion type gas sensor, and if the combustible gas is detected, the audible and visual alarm module is triggered to work so as to remind workers.
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| CN202311510852.0A CN117517407A (en) | 2023-11-13 | 2023-11-13 | Gas detector detection system and detection method |
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| CN202311510852.0A CN117517407A (en) | 2023-11-13 | 2023-11-13 | Gas detector detection system and detection method |
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2023
- 2023-11-13 CN CN202311510852.0A patent/CN117517407A/en active Pending
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