Gas sensor based on Internet of Things

Abstract

The utility model provides an Internet of Things gas sensor. The Internet of Things gas sensor comprises a shell, a gas detection module, a data processing module, a wireless communication module and an alarm module, a gas inlet communicated with the gas detection module is formed in the shell; the gas detection module comprises a CO sensor, an SO2 sensor, an NO2 sensor and a VOCs sensor; the data processing module is electrically connected with the gas detection module; the wireless communication module is electrically connected with the data processing module; the alarm module is electrically connected with the data processing module; the Internet of Things platform interface is formed in the shell and used for connecting and communicating the sensor with an Internet of Things platform; a cleaning device for cleaning the surrounding area of the air inlet is arranged at the air inlet; and a flow guide cover for increasing the air inlet speed and a micro fan are arranged at the air inlet. The device is scientific and reasonable in structural design, high in practicability, convenient to maintain, accurate in monitoring, timely in early warning, low in cost and capable of being popularized and used.

Description

Technical Field

[0001] This utility model belongs to the field of gas detection technology, specifically relating to an Internet of Things (IoT) gas sensor. Background Technology

[0002] With the development of industrial production and the improvement of people's living standards, air quality issues have received increasing attention. Traditional gas detection methods mostly rely on manual detection or the use of single gas detection devices, resulting in low detection efficiency, poor real-time performance, and the inability to share data remotely. For example, in industrial production, leaks of harmful gases can pose a serious threat to the health of workers, and traditional detection equipment cannot monitor this in real time and issue timely alarms. In the field of smart homes, indoor air quality monitoring is also particularly important, but traditional equipment cannot achieve remote monitoring and data sharing, causing inconvenience to users. Therefore, there is a need to design an IoT-based detection device for multiple harmful gases that can quickly provide feedback. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an Internet of Things (IoT) gas sensor that addresses the shortcomings of the prior art. This device can realize functions such as real-time monitoring of gas concentration, remote data transmission, and intelligent alarm, thereby improving the efficiency and accuracy of gas detection.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an Internet of Things gas sensor, characterized in that it includes a shell, a gas detection module, a cleaning device, a data processing module, and an alarm module.

[0005] The housing protects the sensor and is made of corrosion-resistant and high-temperature-resistant materials, such as stainless steel or engineering plastics. The housing contains multiple chambers for housing the gas detection module, data processing module, wireless communication module, and alarm module. An air inlet on the housing surface connects to the chamber containing the gas detection module, ensuring smooth gas entry for detection while preventing dust and moisture from entering the internal circuitry.

[0006] The gas detection module is installed in a chamber inside the housing to detect the concentration of gases in the air. The module includes multiple gas sensors capable of detecting different types of gases, including CO, SO2, NO2, and VOCs sensors. Each gas sensor features high sensitivity and selectivity, accurately detecting the concentration of the target gas. The sensors employ electrochemical or optical sensing, offering advantages such as fast response and good stability. The sensor probes extend beyond the housing's vents, directly contacting the outside air to expand the detection range and accuracy.

[0007] Cleaning Device: A removable filter is installed at the air inlet to filter out airborne particles and dust, preventing them from entering the sensor and affecting detection accuracy and sensor lifespan. The filter is made of high-density filter media, offering excellent filtration and breathability. When excessive particles accumulate on the filter surface, users can easily remove and clean it, keeping the air inlet unobstructed and clean. In addition, a cleaning device is installed at the air inlet, consisting of a miniature motor and a rotating brush head. The miniature motor drives the rotating brush head to periodically rotate, cleaning the area around the air inlet to remove dust and particles adhering to it, ensuring the cleanliness of the air inlet and the normal operation of the sensor.

[0008] Preferably, a flow guide is provided at the air inlet to increase the air intake speed. The flow guide is funnel-shaped, with its larger end facing the air intake direction and its smaller end connected to the sensor probe. The flow guide can guide the airflow smoothly into the sensor probe, reducing airflow turbulence and resistance, and improving the air intake speed and airflow stability. In addition, a miniature fan is also provided at the air inlet. The miniature fan is controlled by the data processing module and automatically adjusts the fan speed according to the detection requirements and environmental conditions, accelerating the speed at which the airflow enters the sensor and improving the response speed and accuracy of gas detection.

[0009] The data processing module is used to process and analyze the data collected by the gas detection module. This module includes a signal amplification circuit, an analog-to-digital converter circuit, and a microprocessor. The signal amplification circuit amplifies the weak signal output from the sensor, the analog-to-digital converter circuit converts the analog signal into a digital signal, and the microprocessor processes the digital signal to calculate the gas concentration value and determine whether it exceeds a preset safety threshold. The data processing module is also responsible for controlling the operating status of the wireless communication module and the alarm module.

[0010] The wireless communication module is installed to transmit data processed by the data processing module to a remote server or user terminal device via a wireless network. The wireless communication module supports multiple wireless communication protocols, such as Wi-Fi, Bluetooth, LoRa, and NB-IoT, enabling stable data transmission and remote sharing. An internal antenna is installed in the module, connecting to an external wireless network through an antenna port on the outer casing to ensure stable signal transmission.

[0011] The alarm module is used to issue an alarm signal when the gas concentration exceeds a preset safety threshold. This module includes an audible and visual alarm and an alarm control circuit. The audible and visual alarm emits sound and light signals when a hazardous gas leak or exceedance is detected, alerting on-site personnel to take emergency measures. The alarm control circuit is connected to the data processing module; when the data processing module determines that the gas concentration exceeds the limit, it triggers the alarm control circuit, activating the audible and visual alarm. The speaker and indicator light of the audible and visual alarm extend from the housing surface to provide a clear audible and visual signal when an alarm is triggered.

[0012] Preferably, the housing is equipped with an IoT platform interface for connecting and communicating between the sensor and the IoT platform. This interface supports various IoT platform protocols, such as MQTT, CoAP, and HTTP, enabling the uploading of data collected by the sensor to the IoT platform and the receiving of control commands from the IoT platform. The IoT platform can store, analyze, and visualize the sensor data, while also enabling remote configuration and management of the sensor.

[0013] Preferably, the signal output terminal of each gas sensor in the gas detection module is connected to the signal input terminal of the data processing module via a signal line. The signal line uses a multi-core cable, with each core corresponding to the signal output of one sensor, ensuring that the signal from each sensor can be independently transmitted to the data processing module. The signal output terminals of the CO sensor, SO2 sensor, NO2 sensor, and VOCs sensor are respectively connected to the corresponding signal input port of the data processing module via signal lines.

[0014] Preferably, the power input terminal of the gas detection module is connected to the power output terminal of the data processing module via a power cable. The data processing module has power management functions, enabling it to provide the required voltage and current to the gas detection module. The power output port of the data processing module outputs a voltage of 5V or 3.3V, which supplies power to the sensor in the gas detection module via the power cable.

[0015] Preferably, to ensure circuit stability and signal accuracy, the gas detection module and the data processing module should be connected via a ground wire to form a common ground loop. This ground connection eliminates noise interference in the circuit and improves signal stability and accuracy.

[0016] Preferably, the analog signal output by the gas sensor is transmitted to the analog-to-digital converter (ADC) circuit in the data processing module via a signal line. The ADC circuit converts the analog signal into a digital signal, which is then further processed and analyzed by the microprocessor. For gas sensors that use digital signal output, the output digital signal is directly transmitted to the microprocessor in the data processing module via the signal line. The microprocessor analyzes and processes the digital signal, calculates the gas concentration value, and determines whether it exceeds a preset safety threshold.

[0017] Preferably, the data processing module can send control signals to the gas detection module to adjust the sensor's operating state according to detection requirements and environmental conditions. For example, the data processing module can control the speed of the miniature fan as needed to accelerate the airflow into the sensor, thereby improving the response speed and accuracy of gas detection.

[0018] Through the aforementioned electrical connections, data transmission methods, and control connections, the gas detection module and the data processing module achieve close collaboration, ensuring accurate acquisition and efficient processing of gas concentration data. This provides a foundation for realizing functions such as real-time monitoring, remote data transmission, and intelligent alarms from gas sensors.

[0019] This utility model has the following advantages compared with the prior art:

[0020] 1. Real-time monitoring: Enables real-time monitoring of gas concentration, timely detection of gas leaks or exceeding standards, and improves safety.

[0021] 2. Data sharing: Data is transmitted to a remote server or user terminal device via a wireless communication module, enabling remote data sharing and real-time viewing, facilitating remote monitoring and management for users.

[0022] 3. Intelligent alarm: When the gas concentration exceeds the preset safety threshold, it can automatically issue an alarm signal to remind on-site personnel and remote users to take emergency measures and reduce the occurrence of accidents.

[0023] 4. Wide range of applications: Applicable to various scenarios such as industrial production, smart home, and environmental monitoring, with broad market application prospects.

[0024] 5. Compact structure: Each module is integrated inside the shell, resulting in a compact structure that facilitates installation and maintenance.

[0025] 6. IoT Platform Support: Connect to the IoT platform via the IoT platform interface to achieve centralized data management and intelligent analysis, thereby improving the system's intelligence level.

[0026] 7. Easy air inlet maintenance: Equipped with a removable filter and automatic cleaning device, it is convenient for users to clean and maintain the air inlet and keep the sensor working properly.

[0027] 8. High intake efficiency: The design of the air guide and micro fan improves the intake speed and airflow stability, speeds up the response of gas detection, and improves detection accuracy.

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0030] Figure 2 This is a partially enlarged structural diagram of the central air intake of this utility model.

[0031] Figure 3 This is a block diagram of the control principle of this utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1—Outer casing; 2—Gas detection module; 3—Data processing module;

[0034] 4—Wireless communication module; 5—Alarm module; 6—IoT platform interface;

[0035] 11—Air inlet; 12—Antenna aperture; 21—CO sensor;

[0036] 22—SO2 sensor; 23—NO2 sensor; 24—VOCs sensor;

[0037] 25—Filter screen; 26—Cleaning device; 27—Flow deflector;

[0038] 28—Miniature fan; 31—Signal amplifier circuit; 32—Analog-to-digital converter circuit;

[0039] 33—Microprocessor. Detailed Implementation

[0040] like Figures 1 to 3 As shown, this utility model includes a gas sensor based on the Internet of Things, comprising a housing 1, a gas detection module 2, a data processing module 3, a wireless communication module 4, an alarm module 5, and an Internet of Things platform interface 6.

[0041] The outer casing 1 is made of stainless steel and has four internal chambers for housing the gas detection module 2, data processing module 3, wireless communication module 4, and alarm module 5, respectively. An air inlet 11 is provided on the surface of the casing to ensure smooth gas entry into the sensor for detection, while preventing dust and moisture from entering the internal circuitry. An antenna hole 12 is also provided on the casing for the antenna of the wireless communication module 4 to connect to an external wireless network.

[0042] The gas detection module 2 includes a CO sensor 21, an SO2 sensor 22, an NO2 sensor 23, and a VOCs sensor 24. Employing electrochemical sensing technology, it can detect the concentrations of CO, SO2, NO2, and VOCs gases in the air. The sensor probe extends out of the housing's air inlet 11, directly contacting the outside air for gas detection. The air inlet 11 is equipped with a removable filter 25 and a cleaning device 26. The filter 25 filters particulate matter and dust from the air, while the cleaning device 26 includes a micro motor and a rotating brush head. The micro motor's shaft connects to the rotating brush head, and the rotation of the micro motor drives the brush head to periodically clean the area around the air inlet. The air inlet 11 also features a deflector 27 and a micro fan 28. The deflector 27 guides the airflow smoothly into the sensor probe, and the micro fan 28 accelerates the airflow into the sensor.

[0043] The data processing module 3 includes a signal amplification circuit 31, an analog-to-digital converter circuit 32, and a microprocessor 33. The signal amplification circuit 31 amplifies the signal output from the sensor, the analog-to-digital converter circuit 32 converts the analog signal into a digital signal, and the microprocessor 33 processes the digital signal to calculate the gas concentration value and determine whether it exceeds a preset safety threshold. The data processing module 3 is also responsible for controlling the operating status of the wireless communication module 4 and the alarm module 5.

[0044] The wireless communication module 4 supports Wi-Fi and LoRa communication protocols, enabling it to transmit data processed by the data processing module 3 to a remote server or user terminal device via a wireless network. An internal antenna is installed within the module, connecting to an external wireless network through the antenna port 12 on the outer casing to ensure stable signal transmission.

[0045] Alarm module 5 includes an audible and visual alarm 51 and an alarm control circuit 52. The audible and visual alarm 51 emits sound and light signals when a harmful gas leak or exceedance is detected, alerting on-site personnel to take emergency measures. The alarm control circuit 52 is connected to the data processing module 3, which determines the gas level.

[0046] In this embodiment, the outer casing 1 is provided with an IoT platform interface 6 for connecting and communicating between the sensor and the IoT platform. This interface supports multiple IoT platform protocols such as MQTT, CoAP, and HTTP, enabling the uploading of data collected by the sensor to the IoT platform and the receiving of control commands from the IoT platform. The IoT platform can store, analyze, and visualize the sensor data, while also enabling remote configuration and management of the sensor.

[0047] In this embodiment, the signal output terminal of each gas sensor in the gas detection module 2 is connected to the signal input terminal of the data processing module 3 via a signal line. The signal line uses a multi-core cable, with each core corresponding to the signal output of one sensor, ensuring that the signals from each sensor can be independently transmitted to the data processing module 3. The signal output terminals of the CO sensor, SO2 sensor, NO2 sensor, and VOCs sensor are respectively connected to the corresponding signal input ports of the data processing module 3 via signal lines.

[0048] In this embodiment, the power input terminal of the gas detection module 2 is connected to the power output terminal of the data processing module 3 via a power cable. The data processing module 3 has power management functions and can provide the required voltage and current to the gas detection module 2. The power output port of the data processing module 3 outputs a voltage of 5V or 3.3V, which provides power to the sensor in the gas detection module 2 via the power cable.

[0049] In this embodiment, to ensure circuit stability and signal accuracy, the gas detection module 2 and the data processing module 3 are connected via a ground wire to form a common ground loop. This ground wire connection eliminates noise interference in the circuit, improving signal stability and accuracy.

[0050] In this embodiment, the analog signal output by the gas sensor is transmitted to the analog-to-digital converter (ADC) circuit in the data processing module 3 via a signal line. The ADC circuit converts the analog signal into a digital signal, which is then further processed and analyzed by the microprocessor. For gas sensors that output digital signals, the digital signal is directly transmitted to the microprocessor in the data processing module via the signal line. The microprocessor analyzes and processes the digital signal, calculates the gas concentration value, and determines whether it exceeds a preset safety threshold.

[0051] In this embodiment, the data processing module 3 can send control signals to the gas detection module 2 to adjust the working state of the sensor according to detection requirements and environmental conditions. Specifically, the data processing module 3 can control the speed of the miniature fan as needed to accelerate the airflow into the sensor and improve the response speed and accuracy of gas detection.

[0052] The above description is merely a preferred embodiment of this utility model and does not constitute any limitation on this utility model. Any simple modifications, alterations, and equivalent changes made to the above embodiments based on the technical essence of this utility model shall still fall within the protection scope of this utility model.

Claims

1. An Internet of Things gas sensor, characterized in that, The application relates to a gas detection device, which comprises a shell, a gas detection module, a data processing module, a wireless communication module and an alarm module; a cavity for mounting the gas detection module, the data processing module, the wireless communication module and the alarm module is arranged in the shell; and a gas inlet communicating with the gas detection module is arranged on the shell. The gas detection module comprises a CO sensor, a SO2 sensor, a NO2 sensor and a VOCs sensor. The data processing module is electrically connected with the gas detection module and is used for processing and analyzing the data collected by the gas detection module. The wireless communication module is electrically connected with the data processing module and is used for transmitting the data processed by the data processing module to a remote server or a user terminal device through a wireless network. The alarm module is electrically connected with the data processing module and is used for sending an alarm signal when the gas concentration exceeds a preset safety threshold. An Internet of Things platform interface is arranged on the shell and is used for connecting and communicating the sensor with the Internet of Things platform. A cleaning device for cleaning the area around the gas inlet is arranged at the gas inlet; and a flow guide cover and a micro fan for increasing the gas inlet speed are arranged at the gas inlet.

2. The gas sensor according to claim 1, characterized by A filter screen is detachably mounted on the gas inlet; the cleaning device comprises a micro motor and a rotating brush head; the rotating brush head is fixedly connected with the rotating shaft of the micro motor; the flow guide cover is in a horn shape; the large end of the flow guide cover faces the gas inlet direction; and the small end of the flow guide cover is connected with the probe of the gas detection module.

3. The gas sensor according to claim 1, characterized by The data processing module comprises a signal amplification circuit, an analog-digital conversion circuit and a microprocessor; the signal amplification circuit is used for amplifying the weak signal output by the sensor; the analog-digital conversion circuit is used for converting the analog signal into a digital signal; and the microprocessor is used for processing the digital signal, calculating the gas concentration value and judging whether the gas concentration value exceeds the preset safety threshold.

4. The gas sensor according to claim 1, characterized by The wireless communication module supports multiple wireless communication protocols, including Wi-Fi, Bluetooth, LoRa and NB-IoT.

5. The gas sensor according to claim 1, characterized by The alarm module comprises an audible and visual alarm and an alarm control circuit; the audible and visual alarm can send sound and light signals when harmful gas leakage or over-standard is detected.

Images