A single-point gas leakage monitoring device and gas leakage monitoring system

Abstract

The application relates to a single-point gas leakage monitoring device and a gas leakage monitoring system, which comprises a gas sensor arranged at a gas monitoring point to monitor a gas concentration; a control module used for generating a pre-warning signal when the gas concentration is greater than a preset threshold value, and driving a local execution assembly according to a remote control instruction; a ZIGBEE communication module used for transmitting the remote control instruction from the control module to the local execution assembly, and feeding back state information of the local execution assembly to the control module; and a 4G Internet communication module used for feeding back the pre-warning signal and the state information of the local execution assembly to a remote control terminal, and transmitting the remote control instruction from the remote control terminal to the control module. The application makes up for the defects that Bluetooth cannot be remotely transmitted and WiFi completely depends on a local network, realizes local rapid response and remote monitoring management cooperation, and guarantees reliable transmission of pre-warning and state data and effective remote control.

Description

Technical Field

[0001] This application relates to the field of gas leak monitoring, and more particularly to a single-point gas leak monitoring device and a gas leak monitoring system. Background Technology

[0002] In the industrial and commercial gas usage sector, gas safety remains a top priority. With the rapid development of industry and commerce, the scale of gas usage is constantly expanding, and the number and types of gas equipment are increasing daily, making gas safety monitoring increasingly important. Effective gas safety monitoring can promptly detect potential safety hazards such as gas leaks, preventing serious accidents such as explosions and poisoning caused by gas leaks, thereby protecting the lives and property of people in industrial and commercial premises and maintaining normal production and operation order. At the same time, with continuous technological advancements, industrial and commercial users have raised higher requirements for the intelligence and remote capabilities of gas safety monitoring, expecting more efficient and accurate monitoring and management.

[0003] Currently, gas monitoring systems used in the industrial and commercial gas monitoring market mainly use Bluetooth or WiFi communication modules to transmit alarm information. Bluetooth technology has a short communication range and can connect to a limited number of devices, making it difficult to stably cover multiple control terminals in complex environments such as kitchens and factories. While WiFi technology has a high speed, it consumes a lot of power, has a complex network configuration, and limited node capacity, making it unsuitable for long-term unattended sensing devices that require battery power.

[0004] The aforementioned technologies have drawbacks: Bluetooth cannot transmit remotely, and WiFi relies entirely on the local network, resulting in blind spots in monitoring once the network fails. Utility Model Content

[0005] To overcome the limitations of Bluetooth's inability to transmit remotely and WiFi's complete reliance on local networks, this application provides a single-point gas leak monitoring device and monitoring system.

[0006] On the one hand, this application provides a single-point gas leak monitoring device, which adopts the following technical solution: A single-point gas leak monitoring device, comprising: Gas sensors are used to monitor gas concentration at gas monitoring points; The control module, connected to the gas sensor, is used to generate an early warning signal when the gas concentration is greater than the gas concentration threshold, and to drive the local execution component according to the remote control command. A ZIGBEE communication module is used to connect with the control module and the local execution component, wherein the ZIGBEE communication module sends the remote control command from the control module to the local execution component, and feeds back the status information of the local execution component to the control module. A 4G IoT communication module is used to connect with the control module and the remote control terminal, wherein the 4G IoT communication module feeds back the warning signal and the status information of the local execution component to the remote control terminal, and transmits the remote control command from the remote control terminal to the control module.

[0007] Using the above solution, the ZIGBEE module constructs a local control network, enabling rapid and automatic linkage between the gas leak monitoring device and local actuators, ensuring a rapid local response when gas concentration exceeds the standard. The 4G IoT communication module establishes a wide-area remote transmission channel, capable of reliably uploading warning signals and the status of local actuators to the remote control terminal in real time, overcoming the transmission distance limitations of Bluetooth and the dependence of WiFi on the local network. Furthermore, the 4G IoT communication module ensures the timely issuance of remote control commands, thus achieving efficient collaboration between rapid local response and remote monitoring and management. Even in areas with local network failures or no WiFi coverage, it ensures reliable transmission of warning information and status data of local actuators, as well as effective remote control.

[0008] Optionally, the local execution component includes a fan and a control valve, and the remote control commands include fan control commands and control valve control commands.

[0009] By adopting the above solution, the local execution components are specifically set as a fan and a control valve. When a gas leak is detected, the fan is activated to ventilate and exhaust the gas, and the control valve is activated to cut off the gas source. This allows for more timely and effective handling of leak hazards and improves safety. At the same time, the fan and control valve can be independently controlled by remote control commands, enabling remote ventilation or gas source cutoff as needed.

[0010] Optionally, the control module includes an analog-to-digital converter, the input of which is connected to the gas sensor.

[0011] By adopting the above scheme, the analog signal monitored by the gas sensor is converted into a digital signal through the analog-to-digital conversion unit, making the signal easier to process and transmit, and improving the accuracy of data processing.

[0012] Optionally, the control module further includes an MCU, the input terminal of which is connected to the analog-to-digital converter unit, and the output terminal of which is connected to the analog-to-digital converter unit; wherein, when the control module receives the fan control command, the MCU generates a fan control signal; when the control module receives the control valve control command, the MCU generates a control valve control signal.

[0013] By adopting the above technical solution, with the MCU as the core processing unit, it can receive and process the digital signals after analog-to-digital conversion and remote control commands, and generate corresponding control signals for the fan and control valve according to the commands, thereby realizing precise control of the fan and control valve and ensuring the timeliness and accuracy of the system response.

[0014] Optionally, the control module further includes a preamplifier circuit, which is located between the gas sensor and the analog-to-digital converter unit.

[0015] By adopting the above scheme, a preamplifier circuit can be added between the gas sensor and the analog-to-digital conversion unit, which can effectively amplify the weak signal output by the gas sensor.

[0016] Optionally, the preamplifier circuit includes a preamplifier and a postamplifier, wherein the preamplifier and the postamplifier are connected in series.

[0017] By adopting the above scheme, and using a preamplifier and a postamplifier connected in series in the preamplifier circuit, multi-stage amplification of the gas sensor output signal can be achieved. This results in a high overall amplification factor while suppressing noise and distortion caused by excessive amplification factor of a single amplifier.

[0018] Optionally, the control module further includes a filtering circuit, which is located between the preamplifier circuit and the analog-to-digital converter unit.

[0019] By adopting the above scheme, a filter circuit can be set between the preamplifier circuit and the analog-to-digital conversion unit to effectively filter out various electromagnetic interferences and noises introduced during signal acquisition and amplification, thereby enhancing the system's anti-interference capability.

[0020] Optionally, the ZIGBEE communication module includes a wind turbine communication module, which receives the wind turbine control signal and sends it to the wind turbine to drive the wind turbine to turn off or on. By adopting the above scheme and setting up a wind turbine communication module, a dedicated local wireless channel is established for the transmission of wind turbine control signals, ensuring the directional transmission and reception of control signals and improving the reliability of wind turbine control in the local control network.

[0021] Optionally, the ZIGBEE communication module further includes a control valve communication module, which receives the control valve control signal and sends it to the control valve to drive the control valve to open or close.

[0022] By adopting the above scheme and adding a control valve communication module, a dedicated local wireless channel is established for the transmission of control valve control signals, ensuring the directional transmission of key control commands and improving the reliability of control valve control in the local control network.

[0023] On the one hand, this application also provides a gas leak detection system, which adopts the following technical solution: A gas leak monitoring system, comprising the single-point gas leak monitoring device.

[0024] By adopting the above scheme, the single-point gas leak monitoring device is used as the core component of the system to achieve efficient monitoring, local linkage and remote control of gas leaks in a single area.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The ZIGBEE module constructs a local control network, enabling rapid and automatic linkage between the gas leak monitoring device and local actuators, ensuring a quick local response when gas concentration exceeds the standard. The 4G IoT communication module establishes a wide-area remote transmission channel, capable of reliably uploading warning signals and the status of local actuators to the remote control terminal in real time, overcoming the transmission distance limitations of Bluetooth and the dependence of WiFi on the local network. Furthermore, the 4G IoT communication module ensures the timely issuance of remote control commands, thus achieving efficient collaboration between rapid local response and remote monitoring and management. Even in areas with local network failures or no WiFi coverage, it ensures reliable transmission of warning information and status data of local actuators, as well as effective remote control. 2. By using a single-point gas leak monitoring device as the core component of the system, efficient monitoring, local linkage, and remote control of gas leaks in a single area can be achieved. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the module of the single-point gas leak monitoring device of Embodiment 1 of this application.

[0027] Figure 2 This is a schematic diagram illustrating the working principle of the gas leak monitoring system in Embodiment 2 of this application.

[0028] Explanation of reference numerals in the attached figures: 100, Gas sensor; 200, Control module; 210, Preamplifier circuit; 220, Filter circuit; 230, Analog-to-digital converter unit; 240, MCU; 300, Zigbee communication module; 310, Fan communication module; 311, Fan status transmission unit; 320, Control valve communication module; 321, Control valve status transmission unit; 400, 4G IoT communication module; 410, Data transmission module; 420, Command transmission module. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0030] This application discloses a single-point gas leak monitoring device and a gas leak monitoring system.

[0031] Example 1 Reference Figure 1 The single-point gas leak monitoring device includes a gas sensor 100, a control module 200, a ZIGBEE communication module 300, and a 4G IoT communication module 400. The gas sensor 100 is connected to the control module 200 to transmit gas concentration signals. The ZIGBEE communication module 300 is wirelessly connected to the control module 200, and the 4G IoT communication module 400 is connected to the control module 200. The gas sensor 100 accurately monitors the gas concentration, the control module 200 processes and judges the gas concentration signals, the ZIGBEE communication module 300 enables the linkage of local actuators, and the 4G IoT communication module 400 enables remote data transmission and command reception. The local actuators include a fan and a control valve.

[0032] The gas sensor 100 is a catalytic gas sensor 100. A catalytic gas sensor 100 generally consists of a monitoring element and a compensation element. The surface of the monitoring element is coated with a catalyst. When the gas comes into contact with the catalyst and burns, heat is generated, causing a change in the resistance of the monitoring element. The gas concentration can be obtained by measuring the change in resistance. Alternatively, a semiconductor gas sensor 100 can be used. A semiconductor gas sensor 100 monitors the gas concentration by utilizing the principle that the electrical properties of a semiconductor material change when it comes into contact with gas. The catalytic gas sensor 100 is fixedly connected to the signal input terminal of the control module 200 via wires. The wires are generally made of materials with good conductivity and insulation to ensure the stability of signal transmission.

[0033] Reference Figure 1 The control module 200 includes an analog-to-digital converter (ADC) 230 and an MCU 240 (Microcontroller Unit). The input of the ADC 230 is connected to the gas sensor 100, and the input of the MCU 240 is connected to the output of the ADC 230. The MCU 240 can be an ARM-based microcontroller (such as an STM32H7 chip), characterized by high performance and low power consumption, capable of quickly processing the digital signals output by the ADC 230. When the control module 200 receives a fan control command, the MCU 240 generates a fan control signal; when it receives a control valve control command, the MCU 240 generates a control valve control signal. The MCU 240 parses and processes the input commands through its internal program algorithm and then outputs the corresponding control signals.

[0034] The control module 200 also includes a preamplifier circuit 210 arranged in series, located between the gas sensor 100 and the analog-to-digital converter unit 230. The preamplifier circuit 210 includes a preamplifier and a post-amplifier. The preamplifier can be a low-noise operational amplifier, such as the AD8605, which can amplify weak gas concentration signals while minimizing noise introduction and ensuring the initial amplification quality of the signal. Alternatively, a high-precision operational amplifier can be used to amplify the signal. The post-amplifier can be a PGA (Programmable Gain Amplifier), which can dynamically adjust the gain according to the strength of the input signal, adjusting the amplitude of the gas concentration signal output from the preamplifier to the input range of the analog-to-digital converter unit 230. The output terminal of the preamplifier and the input terminal of the post-amplifier are connected by wires, and the connection method must ensure the stability and accuracy of signal transmission.

[0035] The control module 200 also includes a filter circuit 220, located between the preamplifier circuit 210 and the analog-to-digital converter unit 230. The filter circuit 220 can be a low-pass filter, such as a MAX294 low-pass switched-capacitor filter. It utilizes the low-pass filtering function of switched capacitors to effectively filter out high-frequency noise and interference signals in the gas concentration signal, allowing only low-frequency valid signals to pass. Alternatively, the filter circuit 220 can be an RC low-pass filter, composed of resistors and capacitors, achieving low-pass filtering through the combination of resistors and capacitors. The input terminal of the filter circuit 220 is connected to the output terminal of the preamplifier circuit 210, and the output terminal is connected to the input terminal of the analog-to-digital converter unit 230. This connection method filters the preamplified signal, removing noise and interference and improving signal quality.

[0036] The input of the analog-to-digital converter (ADC) 230 is connected to the output of the filter circuit 220, enabling it to convert the analog gas concentration signal into digital gas concentration data. The ADC 230 can be an ADS1256. The ADC 230 receives the filtered gas concentration signal and converts it into gas concentration data. The input of the MCU 240 (Microcontroller Unit) is connected to the output of the ADC 230 to receive the gas concentration data. The MCU 240 performs a threshold judgment based on the received gas concentration data: when the gas concentration data exceeds the gas concentration threshold, the MCU 240 generates a warning signal. Remote control commands include fan control commands and control valve control commands. When the control module 200 receives a fan control command, the MCU 240 generates a fan control signal; when the control module 200 receives a control valve control command, the MCU 240 generates a control valve control signal.

[0037] Reference Figure 1The ZIGBEE communication module 300 is used to connect with the control module 200 and local execution components. The ZIGBEE communication module 300 can use the CC2652R7 chip, which features low power consumption and high reliability, enabling stable signal reception and transmission. The ZIGBEE communication module 300 includes a fan communication module 310 and a control valve communication module 320. The fan communication module 310 includes a fan status transmission unit 311, used to receive fan status and send it to the control module 200. The fan status transmission unit 311 can be a data acquisition device, which connects to the fan's status monitoring interface to collect information such as the fan's operating status and speed, and feeds this information back to the control module 200. The control valve communication module 320 receives control valve control signals and transmits them to the control valve. The control valve communication module 320 includes a control valve status transmission unit 321, used to receive control valve status and transmit it to the control module 200. The control valve status transmission unit 321 is also a data acquisition unit. It is connected to the status monitoring interface of the control valve, collects information such as the opening and closing status of the control valve, and feeds it back to the control module 200.

[0038] Reference Figure 1 The 4G IoT communication module 400 is used to connect with the control module 200 and the remote control terminal. The 4G IoT communication module 400 can use the EC200A module, which has high-speed data transmission capabilities and stable network connectivity. The 4G IoT communication module 400 includes a data transmission module 410 and a command transmission module 420. The data transmission module 410 transmits warning signals, gas concentration data, fan status signals, and control valve status signals to the remote control terminal. The command transmission module 420 receives fan control commands and control valve control commands sent by the remote control terminal and transmits them to the control module 200 to remotely control the opening or closing of the fan and control valve. The data transmission module 410 and the command transmission module 420 transmit data and commands through internal communication protocols and hardware circuits.

[0039] The implementation principle of Example 1 is as follows: The single-point gas leak monitoring device in this example accurately monitors the gas concentration through the gas sensor 100. The control module 200 processes and judges the monitoring signal, and generates an early warning signal when the gas concentration exceeds the threshold. The ZIGBEE communication module 300 realizes communication and linkage between the local execution component and the control module 200, ensuring that the local execution component can respond to control commands in a timely manner. The 4G IoT communication module 400 realizes remote data transmission and command reception with the remote control terminal, allowing the remote control terminal to grasp the on-site situation in real time and issue control commands. This combination method breaks through the limitations of existing Bluetooth and WiFi communication technologies, improves the efficiency and reliability of gas leak monitoring and control, ensures the safety of gas usage sites, and compared with existing technologies, can work stably in complex environments, reduce monitoring blind spots, and achieve efficient collaboration between local and remote systems.

[0040] Example 2 Embodiment 2 of this application also discloses a gas leak monitoring system, which has the monitoring and early warning device described in Embodiment 1 above. The difference between this embodiment and the previous embodiments is that it further includes a local execution component and a remote control terminal. The local execution component includes a fan and a control valve.

[0041] Reference Figure 2 The fan is connected to a single-point gas leak monitoring device. The fan is equipped with a status feedback port, which can wirelessly communicate with the control module 200 via a ZIGBEE communication module 300 to feed back information such as the fan's operating status and fault status to the control module 200. The fan can be an intelligent fan with ZIGBEE communication capabilities, or a regular fan paired with the ZIGBEE communication module 300, thereby achieving remote control and status feedback.

[0042] Reference Figure 2 The control valve connects to a single-point gas leak monitoring device and opens or closes the gas pipeline based on the signal. The control valve also has a status feedback port, which can be wirelessly or wiredly connected to the control module 200 via the ZIGBEE communication module 300 to feed back its own open, closed, or fault status information to the control module 200. The control valve can be an intelligent control valve with ZIGBEE communication capabilities, or a regular control valve paired with the ZIGBEE communication module 300 to achieve remote control and status acquisition.

[0043] When the single-point gas leak monitoring device detects a gas leak and receives a remote control command, the fan communication module 310 transmits a fan control signal to the fan. Upon receiving the control signal, the fan begins operation, providing ventilation and reducing the concentration of gas in the area. The control valve communication module 320 transmits a control valve control signal to the control valve. Upon receiving the control valve control signal, the control valve begins operation, cutting off the gas source and preventing further leakage when closed. Simultaneously, the status information of the fan and control valve is fed back to the control module 200 through their respective status feedback ports, enabling real-time monitoring and control of the local actuators.

[0044] Reference Figure 2 The remote control terminal establishes a wireless connection with the 4G IoT communication module 400 in the single-point gas leak monitoring device. The remote control terminal can receive early warning signals, gas concentration data, fan status signals, and control valve status signals transmitted from the 4G IoT communication module 400, allowing operators to monitor the situation on-site in real time. Simultaneously, operators can send fan control commands and control valve control commands through the remote control terminal, which are then transmitted to the control module 200 via the 4G IoT communication module 400, thereby controlling the operation of the local execution components.

[0045] The implementation principle of Example 2 is as follows: This gas leak monitoring system uses a single-point gas leak monitoring device as its core. A ZIGBEE communication module 300 wirelessly connects the system to the local execution component, establishing a local control network to ensure a rapid response from the local execution component in the event of a gas leak. A 4G IoT communication module 400 enables wireless communication with the remote control terminal, establishing a wide-area remote transmission channel, allowing the remote control terminal to monitor the situation on-site in real time and perform remote control. This system combination ensures both rapid and automatic local handling of leak hazards and guarantees remote personnel's ability to monitor and intervene in the on-site situation in real time, enhancing the overall reliability and management flexibility of the system.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A single-point gas leak monitoring device, characterized in that, include: A gas sensor (100) is used to be installed at a gas monitoring point to monitor the gas concentration; The control module (200), connected to the gas sensor (100), is used to generate a warning signal when the gas concentration is greater than the gas concentration threshold, and to drive the local execution component according to the remote control command; A ZIGBEE communication module (300) is used to connect to the control module (200) and the local execution component, wherein the ZIGBEE communication module (300) sends the remote control command from the control module (200) to the local execution component and feeds back the status information of the local execution component to the control module (200). A 4G IoT communication module (400) is used to connect with the control module (200) and the remote control terminal. The 4G IoT communication module feeds back the warning signal and the status information of the local execution component to the remote control terminal, and transmits the remote control command from the remote control terminal to the control module (200).

2. The single-point gas leak monitoring device according to claim 1, characterized in that, The local execution components include a fan and a control valve, and the remote control commands include fan control commands and control valve control commands.

3. The single-point gas leak monitoring device according to claim 2, characterized in that, The control module (200) includes an analog-to-digital converter (230), the input of which is connected to the gas sensor (100).

4. The single-point gas leak monitoring device according to claim 3, characterized in that, The control module also includes an MCU (240), the input of which is connected to the output of the analog-to-digital converter (230); wherein, when the control module (200) receives the fan control command, the MCU (240) generates a fan control signal; when the control module (200) receives the control valve control command, the MCU (240) generates a control valve control signal.

5. The single-point gas leak monitoring device according to claim 4, characterized in that, The control module (200) further includes a preamplifier circuit (210), which is located between the gas sensor (100) and the analog-to-digital converter (230).

6. The single-point gas leak monitoring device according to claim 5, characterized in that, The preamplifier circuit (210) includes a preamplifier and a postamplifier, wherein the preamplifier and the postamplifier are connected in series.

7. The single-point gas leak monitoring device according to claim 5, characterized in that, The control module (200) further includes a filter circuit (220), which is located between the preamplifier circuit (210) and the analog-to-digital converter unit (230).

8. The single-point gas leak monitoring device according to claim 4, characterized in that, The ZIGBEE communication module (300) includes a wind turbine communication module (310), which receives the wind turbine control signal and sends it to the wind turbine to drive the wind turbine to turn off or on.

9. The single-point gas leak monitoring device according to claim 4, characterized in that, The ZIGBEE communication module (300) also includes a control valve communication module (320), which receives the control valve control signal and sends it to the control valve to drive the control valve to close or open.

10. A gas leak detection system, characterized in that, include: The single-point gas leak monitoring device as described in any one of claims 1 to 9.

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