Portable flue multi-component gas synchronous sampling module based on narrowband internet of things

Abstract

The utility model relates to exhaust detection technical field, concretely relates to portable flue multicomponent gas synchronous sampling module based on narrowband internet of things, include: upper casing, the bottom outer wall fixedly connected with lower casing of upper casing, its characterized in that, the outer wall fixedly connected with touch display screen of upper casing, the lateral outer wall fixedly connected with signal enhancement antenna of lower casing, the inside of lower casing is equipped with gas sampling device. Through gas sampling device, utilize integrated design and integrate sampling, detection, processing and transmission module in compact casing, be convenient for operating personnel to be held and move to patrol and examine in industrial field, adapt to the sampling demand of flue of different position, with the help of single pump air extraction and common gas storage cavity structure, make multiple sensors contact same gas sample simultaneously, ensure that the detection data of multicomponent gas has space-time consistency, improve the accuracy and reliability of flue gas composition analysis.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas detection technology, specifically to a portable flue gas multi-component synchronous sampling module based on narrowband Internet of Things. Background Technology

[0002] Existing flue gas sampling equipment has shortcomings. Traditional equipment is mostly for single-component detection, requiring multiple samplings which leads to data asynchrony and makes it difficult to meet the needs of mobile inspection in industrial sites. At the same time, some equipment relies on wired transmission or ordinary wireless modules, which further limits portability and makes it difficult to adapt to the flexible sampling needs of complex industrial scenarios.

[0003] Therefore, this utility model of a portable multi-component gas synchronous sampling module for flues based on narrowband Internet of Things has emerged. In terms of portability, it adopts an integrated design, with a compact structure and light weight, making it easy to operate by hand on site. In terms of multi-component synchronous detection, it uses a single diaphragm pump for air extraction and a shared gas storage chamber design, allowing multiple sets of sensors to simultaneously contact the same gas sample, avoiding the time difference of multiple samplings, and realizing synchronous detection of multi-component gases. This ensures data accuracy, simplifies the structure, reduces the size of the equipment, and takes into account both portability and multi-component detection requirements, meeting the urgent need of the waste gas detection industry for the portable function of the multi-component gas synchronous sampling module for flues. Utility Model Content

[0004] To address the shortcomings of existing technologies, the technical solution adopted by this utility model is as follows: a portable flue gas multi-component synchronous sampling module based on narrowband Internet of Things, comprising: an upper shell, a lower shell fixedly connected to the bottom outer wall of the upper shell, a touch screen fixedly connected to the outer wall of the upper shell, a signal enhancement antenna fixedly connected to the side outer wall of the lower shell, and a gas sampling device inside the lower shell; the gas sampling device includes a miniature diaphragm pump, with gas pipes fixedly connected to the inlet and outlet ends of the miniature diaphragm pump respectively. During operation, the module first extracts gas samples from the flue through the gas sampling device inside the lower shell, processes and converts the data after detection and analysis, and then uploads it to the cloud via wireless transmission. Simultaneously, local interaction and data display are achieved through the touch screen on the upper shell.

[0005] Preferably, an electrochemical sensor is provided on one side of the miniature diaphragm pump. This electrochemical sensor is used to analyze the content of different gases in the flue gas mixture. This portable flue gas multi-component synchronous sampling module integrates gas collection, detection, data processing, and wireless transmission functions to achieve simultaneous sampling and remote monitoring of three characteristic gases in the flue gas. During the gas collection phase, a miniature diaphragm pump (model JUYAY-6032-B-PE) is used as the power source. This pump features low power consumption, wide temperature adaptability, and stable flow characteristics. It has strong resistance to dust clogging, requires no frequent maintenance, and can continuously extract flue gas under limited power supply from handheld devices while avoiding gas sample concentration deviations caused by flow fluctuations. The flue gas first enters the gas pipe and then passes through the inlet of the connected miniature diaphragm pump. The outlet of the pump is connected to the inlet of the gas storage chamber via a gas pipe of the same specification. The start and stop of the miniature diaphragm pump are controlled by the data processing and control module with a CETCLQFP48 package through the GPIO pin. When the user touch screen triggers sampling or the cloud sends a sampling task, the GPIO pin outputs a high level to connect the power supply circuit of the pump, and the pump starts to pump gas. After a period of time, the GPIO pin switches to a low level, and the pump stops working to avoid fluctuations in the gas sample concentration caused by continuous gas flow.

[0006] Preferably, the lower housing is divided into multiple areas by a partition, namely an air inlet chamber, a gas storage chamber, a transmission chamber, and a power supply chamber. The outer wall of the micro diaphragm pump is fixedly connected to the inner wall of the air inlet chamber, and the outer wall of the gas pipe is fixedly connected to the inner wall of the gas storage chamber. In the gas detection stage, the core is to achieve "true synchronization" detection through the gas storage chamber structure and sensor layout. The gas storage chamber is a long, sealed cavity with an air inlet at one end, connected to the micro diaphragm pump through a gas pipe, and a pressure relief port at the other end. After detection, the gas can be slowly discharged. Multiple sets of electrochemical sensors, corresponding to three target gases, are arranged in a linear array along the inner wall of the gas storage chamber. The detection surfaces all face the inner side of the cavity and are perpendicular to the airflow direction. After the gas enters from the air inlet, it can evenly cover the detection surfaces of all sensors, ensuring that multiple sets of sensors simultaneously contact the gas sample of the same concentration at the same time point, eliminating the time difference of traditional multi-pump independent sampling or multi-stage sampling. The gas concentration is converted into a weak current signal through electrochemical reaction, providing accurate raw signals for subsequent data processing.

[0007] Preferably, a wireless transmission module is provided on one side of the electrochemical sensor, a data processing and control module is provided on the other side of the wireless transmission module, and a battery is provided on the other side of the wireless transmission module. During the data processing stage, the data processing and control module reads the sensor signal through the ADC interface, first converts the weak current signal into an analog voltage signal, and then the ADC module converts it into a digital quantity. Combined with the built-in multi-point linear calibration algorithm, it is converted into an actual gas concentration value. Subsequently, the module integrates multiple sets of gas concentration values ​​into a standardized data frame. At the same time, the data processing and control module interacts bidirectionally with the touch screen through the I²C interface. User touch operations, such as starting sampling, setting an adjustable sampling interval, and viewing historical data, generate instruction signals that are transmitted to the module via I²C. After the module executes the corresponding operation, it feeds back information such as real-time concentration value, device status, and timestamp to the display screen via I²C. In addition, the data processing and control module manages power consumption through GPIO. During non-sampling periods, it controls the micro diaphragm pump, electrochemical sensor, and wireless transmission module to enter sleep mode, retaining only the display screen backlight and clock circuit. During the sampling period, each module is activated in the sequence of "pump start → sensor wake-up → data acquisition → pump stop → data processing → transmission", and immediately returns to sleep mode after completion.

[0008] Preferably, the outer wall of the data processing and control module is connected to the outer wall of the micro diaphragm pump, electrochemical sensor, and wireless transmission module via wires. The outer walls of the wireless transmission module and the data processing and control module are fixedly connected to the inner wall of the transmission cavity, and the outer wall of the battery is fixedly connected to the inner wall of the power supply cavity. During the data transmission phase, remote monitoring and command interaction are achieved through narrowband IoT. The wireless transmission module uses a Quectel NB-IoT EC800M module, whose operating frequency band is compatible with the networks of major domestic operators, possessing strong anti-interference capabilities and wide coverage characteristics. It is further enhanced with a signal boosting antenna to improve signal reception strength. The wireless transmission module communicates with the data processing and control module through a UART interface. When uploading data, the data processing module sends standardized data frames to the wireless module via UART. After encapsulation according to the MQTT protocol, the wireless module accesses the operator's NB-IoT network via the signal boosting antenna and uploads data to the cloud. The cloud platform receives the data, parses it, and stores it in the database, supporting historical data queries. The wireless transmission module automatically enters sleep mode after data upload is completed. Since the data processing and control module is woken up via GPIO pins, continuous standby power consumption is avoided.

[0009] The beneficial effects of this utility model are as follows:

[0010] 1. This utility model integrates the sampling, detection, processing and transmission modules into a compact housing by setting up a gas sampling device and using an integrated design, avoiding the problem of large size caused by the scattered layout of multiple components. At the same time, it adopts low-power components and an optimized power supply scheme to reduce the weight of the equipment, making it convenient for operators to carry out handheld mobile inspections in industrial sites and adapting to the sampling needs of flues in different locations.

[0011] 2. This utility model, by setting up a gas sampling device and utilizing a single-pump extraction and shared gas storage chamber structure, enables multiple sets of sensors to simultaneously contact the same gas sample, eliminating the time difference and environmental interference caused by traditional multiple sampling or independent sampling by multiple pumps, ensuring the spatiotemporal consistency of detection data for multi-component gases, and improving the accuracy and reliability of flue gas composition analysis. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the back structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the internal structure of this utility model;

[0015] Figure 4 This is a schematic diagram of the gas sampling device of this utility model;

[0016] Figure 5 This is a system flowchart of this utility model.

[0017] In the diagram: 1. Upper housing; 2. Lower housing; 3. Touch screen; 4. Signal enhancement antenna; 5. Gas sampling device; 50. Miniature diaphragm pump; 51. Gas tube; 52. Electrochemical sensor; 53. Wireless transmission module; 54. Data processing and control module; 55. Battery. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0019] Example:

[0020] Please see Figure 1 - Figure 5This utility model provides a technical solution: a portable flue gas multi-component synchronous sampling module based on narrowband Internet of Things, comprising: an upper shell 1, a lower shell 2 fixedly connected to the bottom outer wall of the upper shell 1, a touch screen 3 fixedly connected to the outer wall of the upper shell 1, a signal enhancement antenna 4 fixedly connected to the side outer wall of the lower shell 2, and a gas sampling device 5 provided inside the lower shell 2; the gas sampling device 5 includes a miniature diaphragm pump 50, and gas pipes 51 are fixedly connected to the inlet and outlet ends of the miniature diaphragm pump 50, respectively.

[0021] An electrochemical sensor 52 is provided on one side of the micro diaphragm pump 50. The electrochemical sensor 52 is used to analyze the content of different gases in the flue gas in the three-part gas mixture.

[0022] The lower housing 2 is divided into multiple areas by a partition, namely an air inlet chamber, an air storage chamber, a transmission chamber, and a power supply chamber. The outer wall of the micro diaphragm pump 50 is fixedly connected to the inner wall of the air inlet chamber, and the outer wall of the air pipe 51 is fixedly connected to the inner wall of the air storage chamber.

[0023] The outer wall of the electrochemical sensor 52 is fixedly connected to the inner wall of the gas storage chamber. A wireless transmission module 53 is provided on one side of the electrochemical sensor 52, a data processing and control module 54 is provided on one side of the wireless transmission module 53, and a battery 55 is provided on one side of the wireless transmission module 53.

[0024] The outer wall of the data processing and control module 54 is connected to the outer wall of the micro diaphragm pump 50, the electrochemical sensor 52 and the wireless transmission module 53 via wires. The outer walls of the wireless transmission module 53 and the data processing and control module 54 are fixedly connected to the inner wall of the transmission cavity, and the outer wall of the battery 55 is fixedly connected to the inner wall of the power supply cavity.

[0025] Working principle:

[0026] The portable flue gas multi-component synchronous sampling module integrates gas collection, detection, data processing, and wireless transmission functions to achieve simultaneous sampling and remote monitoring of three characteristic gases in the flue. During operation, battery 55 powers the module. The module first extracts gas samples from the flue through the gas sampling device 5 inside the lower housing 2. After detection and analysis, the data is processed and converted, then wirelessly transmitted to the cloud. Simultaneously, local interaction and data display are achieved using the touchscreen display 3 on the upper housing 1.

[0027] During the gas sampling phase, a miniature diaphragm pump 50 (model JUYAY-6032-B-PE) is used as the power source. This pump features low power consumption, wide temperature adaptability, and stable flow characteristics. It has strong resistance to dust clogging, requires no frequent maintenance, and can continuously extract flue gas under the limited power supply of handheld devices, avoiding gas sample concentration deviations caused by flow fluctuations. The flue gas first enters the gas pipe 51, and then passes through the inlet of the miniature diaphragm pump 50 connected to it. The outlet of the pump is connected to the inlet of the gas storage chamber via the same-specification gas pipe 51. The start and stop of the miniature diaphragm pump 50 are controlled by the data processing and control module 54 (model CETCLQFP48) through GPIO pins. When the user touch screen triggers sampling or the cloud sends a sampling task, the GPIO pin outputs a high level to connect the power supply circuit of the pump, and the pump starts pumping gas. After a period of time, the GPIO pin switches to a low level, and the pump stops working, avoiding gas sample concentration fluctuations caused by continuous gas flow.

[0028] In the gas detection stage, the core lies in achieving "true synchronization" detection through the gas storage chamber structure and sensor layout. The gas storage chamber is a long, sealed cavity with an air inlet at one end, connected to a micro diaphragm pump 50 via a gas pipe 51, and a pressure relief port at the other end. After detection, the gas can be slowly discharged. Multiple sets of electrochemical sensors 52, corresponding to three target gases respectively, are arranged in a linear array along the inner wall of the gas storage chamber, with the detection surfaces facing the inner side of the chamber and perpendicular to the airflow direction. After the gas enters from the air inlet, it can evenly cover the detection surfaces of all sensors, ensuring that multiple sets of sensors simultaneously contact the gas sample of the same concentration at the same time point, eliminating the time difference of traditional multi-pump independent sampling or multiple sampling. The gas concentration is converted into a weak current signal through electrochemical reaction, providing accurate raw signals for subsequent data processing.

[0029] During the data processing phase, the data processing and control module 54 reads sensor signals through the ADC interface, first converting the weak current signal into an analog voltage signal, and then converting it into a digital quantity by the ADC module. Combined with a built-in multi-point linear calibration algorithm, this is converted into an actual gas concentration value. Subsequently, the module integrates multiple sets of gas concentration values ​​into a standardized data frame. Simultaneously, the data processing and control module 54 interacts bidirectionally with the touch display screen 3 via the I²C interface. User touch operations, such as starting sampling, setting an adjustable sampling interval, and viewing historical data, generate instruction signals that are transmitted to the module via I²C. After executing the corresponding operation, the module feeds back information such as real-time concentration values, device status, and timestamps to the display screen via I²C. Furthermore, the data processing and control module 54 manages power consumption through GPIO. During non-sampling periods, it controls the micro diaphragm pump 50, electrochemical sensor 52, and wireless transmission module 53 to enter sleep mode, retaining only the display screen backlight and clock circuit. During sampling periods, each module is activated in the sequence of "pump start → sensor wake-up → data acquisition → pump stop → data processing → transmission," and immediately returns to sleep mode upon completion.

[0030] During the data transmission phase, remote monitoring and command interaction are achieved through narrowband IoT. The wireless transmission module 53 uses a Quectel NB-IoT EC800M module, whose operating frequency band is compatible with the networks of major domestic operators. It has strong anti-interference capabilities and wide coverage characteristics, and is further enhanced by the signal boosting antenna 4 to improve signal reception strength. The wireless transmission module 53 communicates with the data processing and control module 54 through a UART interface. When uploading data, the data processing module sends standardized data frames to the wireless module via UART. The wireless module encapsulates the data according to the MQTT protocol and connects to the operator's NB-IoT network via the signal boosting antenna 4 to upload data to the cloud. After receiving the data, the cloud platform parses and stores it in the database, supporting historical data queries. The wireless transmission module 53 automatically enters sleep mode after the data upload is completed. Since the data processing and control module 54 is woken up through GPIO pins, continuous standby power consumption is avoided.

[0031] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A portable flue gas multi-component synchronous sampling module based on narrowband Internet of Things, comprising: The upper housing (1) is fixedly connected to the bottom outer wall of the upper housing (1), and the lower housing (2) is fixedly connected to the outer wall of the upper housing (1). The upper housing (1) is characterized by having a touch screen (3) fixedly connected to the outer wall of the upper housing (1), a signal enhancement antenna (4) fixedly connected to the side outer wall of the lower housing (2), and a gas sampling device (5) provided inside the lower housing (2). The gas sampling device (5) includes a micro diaphragm pump (50), and the inlet and outlet of the micro diaphragm pump (50) are respectively fixedly connected to a gas pipe (51).

2. The portable flue gas multi-component synchronous sampling module based on narrowband Internet of Things according to claim 1, characterized in that: An electrochemical sensor (52) is provided on one side of the micro diaphragm pump (50), which is used to analyze the content of different gases in the flue gas in the three gases.

3. The portable flue gas multi-component synchronous sampling module based on narrowband Internet of Things according to claim 1, characterized in that: The lower housing (2) is divided into multiple areas by a partition, namely an air inlet chamber, an air storage chamber, a transmission chamber and a power supply chamber. The outer wall of the micro diaphragm pump (50) is fixedly connected to the inner wall of the air inlet chamber, and the outer wall of the air pipe (51) is fixedly connected to the inner wall of the air storage chamber.

4. The portable flue gas multi-component synchronous sampling module based on narrowband Internet of Things according to claim 2, characterized in that: The outer wall of the electrochemical sensor (52) is fixedly connected to the inner wall of the gas storage chamber.

5. The portable flue gas multi-component synchronous sampling module based on narrowband Internet of Things according to claim 2, characterized in that: The electrochemical sensor (52) has a wireless transmission module (53) on one side, a data processing and control module (54) on one side of the wireless transmission module (53), and a battery (55) on one side of the wireless transmission module (53).

6. The portable flue gas multi-component synchronous sampling module based on narrowband Internet of Things according to claim 5, characterized in that: The outer wall of the data processing and control module (54) is connected to the outer wall of the micro diaphragm pump (50), the electrochemical sensor (52) and the wireless transmission module (53) by wires. The outer walls of the wireless transmission module (53) and the data processing and control module (54) are fixedly connected to the inner wall of the transmission cavity. The outer wall of the battery (55) is fixedly connected to the inner wall of the power supply cavity.

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