A device for detecting nitrogen oxides

Abstract

The utility model discloses a kind of nitrogen oxide detection devices, it includes gas collection module, signal conversion module, data processing module and feedback control module. Gas collection module reduces particulate matter interference by porous filter assembly, signal conversion module utilizes electrochemical sensor to convert gas concentration into electrical signal, feedback control module dynamically adjusts sensor parameter to optimize sensitivity, environmental compensation module corrects temperature and humidity influence. In addition, the device is also provided with display module, storage module, wireless communication module and alarm module, and can realize data real-time monitoring, remote transmission and overproof alarm. The application can improve detection precision, response speed and real-time monitoring capability, meet complex scene application requirement.

Description

Technical Field

[0001] This utility model relates to the field of environmental monitoring and analysis instruments, and in particular to a nitrogen oxide detection device. Background Technology

[0002] Nitrogen oxides (NOx) are a significant source of air pollution, and their concentration detection is crucial for environmental monitoring and industrial emission control. While a variety of NOx detection devices are currently available, some have limitations in detection accuracy and response speed. Furthermore, traditional detection methods often rely on manual operation and data recording, making real-time monitoring and automatic feedback difficult, which restricts their effectiveness in complex scenarios. Utility Model Content

[0003] The purpose of this utility model is to provide a nitrogen oxide detection device that solves the problems mentioned in the background art.

[0004] This invention is implemented as follows: a nitrogen oxide detection device, comprising:

[0005] Gas acquisition module, signal conversion module, data processing module, and feedback control module;

[0006] The input of the feedback control module is connected to the gas acquisition module, and the output is connected to the signal conversion module. The feedback control module is configured to receive the initial gas concentration information acquired by the gas acquisition module and adjust the working state of the signal conversion module according to preset rules.

[0007] The input of the signal conversion module is connected to the gas acquisition module, and the output is connected to the data processing module. The signal conversion module is configured to convert the gas concentration information acquired by the gas acquisition module into an electrical signal and transmit it to the data processing module.

[0008] In an exemplary embodiment of this utility model, the gas acquisition module includes:

[0009] Porous filter components and gas sensing probes;

[0010] A porous filter assembly is installed at the air inlet of the gas acquisition module to filter particulate matter from the gas entering the gas acquisition module; a gas sensing probe is located behind the porous filter assembly to detect the concentration of nitrogen oxides in the gas; the porous filter assembly and the gas sensing probe are fixed together by a threaded connection, and a sealing ring is provided between them to prevent gas leakage.

[0011] In an exemplary embodiment of this utility model, the signal conversion module includes:

[0012] Electrochemical sensors and analog-to-digital conversion units;

[0013] The input terminal of the electrochemical sensor is connected to the gas sensing probe, and the output terminal is connected to the analog-to-digital converter unit. The electrochemical sensor is configured to convert the nitrogen oxide concentration information detected by the gas sensing probe into an analog current signal. The analog-to-digital converter unit is configured to convert the analog current signal into a digital signal and transmit it to the data processing module.

[0014] In an exemplary embodiment of this utility model, the feedback control module includes:

[0015] Microprocessor and regulating switch;

[0016] The microprocessor's input is connected to the gas acquisition module, and its output is connected to the adjustment switch. The other end of the adjustment switch is connected to the signal conversion module. The microprocessor is configured to determine whether the operating parameters of the electrochemical sensor need to be adjusted based on the initial gas concentration information obtained by the gas acquisition module. If necessary, the microprocessor adjusts the power supply voltage of the electrochemical sensor by adjusting the switch to optimize its sensitivity.

[0017] In an exemplary embodiment of this invention, the nitrogen oxide detection device further includes:

[0018] Environmental compensation module, display module, and storage module;

[0019] The input of the environmental compensation module is connected to the data processing module, and the output is connected to the display module; the input of the storage module is connected to the data processing module; the environmental compensation module is configured to correct the nitrogen oxide concentration detection results according to changes in ambient temperature and humidity; the display module is configured to display the corrected nitrogen oxide concentration value in real time; the storage module is configured to record all data during the detection process.

[0020] In an exemplary embodiment of this utility model, the environmental compensation module includes:

[0021] Temperature and humidity sensor and compensation algorithm unit;

[0022] The temperature and humidity sensor is installed outside the housing of the gas acquisition module to detect ambient temperature and humidity; the input of the compensation algorithm unit is connected to the temperature and humidity sensor, and the output is connected to the data processing module; the compensation algorithm unit is configured to generate correction coefficients based on the environmental parameters detected by the temperature and humidity sensor, and transmit the correction coefficients to the data processing module to correct the nitrogen oxide concentration value.

[0023] In an exemplary embodiment of this invention, the nitrogen oxide detection device further includes:

[0024] Wireless communication module and remote monitoring terminal;

[0025] The input end of the wireless communication module is connected to the data processing module, and the output end is connected to the remote monitoring terminal. The wireless communication module is configured to transmit the nitrogen oxide concentration data generated by the data processing module to the remote monitoring terminal in real time. The remote monitoring terminal is configured to analyze the received data and generate visualization charts.

[0026] In an exemplary embodiment of this invention, the nitrogen oxide detection device further includes:

[0027] Alarm module;

[0028] The input end of the alarm module is connected to the data processing module, and the output end is equipped with an audible and visual alarm. The alarm module is configured to trigger the audible and visual alarm to issue an alarm signal when the nitrogen oxide concentration exceeds a preset threshold.

[0029] In an exemplary embodiment of this invention, the nitrogen oxide detection device further includes:

[0030] Power management module;

[0031] The power management module's input is connected to an external power supply, and its output is connected to the gas acquisition module, signal conversion module, data processing module, and feedback control module, respectively. The power management module is configured to distribute and stabilize the power supply voltage of each module.

[0032] The technical advantages of the nitrogen oxide detection device provided in this embodiment of the utility model are as follows:

[0033] This invention achieves high-precision detection and real-time monitoring of nitrogen oxide concentration by incorporating a gas acquisition module, a signal conversion module, a data processing module, and a feedback control module. The porous filter component in the gas acquisition module effectively reduces interference from particulate matter, improving detection accuracy. The feedback control module optimizes detection sensitivity by adjusting the operating parameters of the electrochemical sensor. The environmental compensation module further enhances the accuracy of the detection results by correcting for ambient temperature and humidity. Furthermore, the introduction of a wireless communication module and a remote monitoring terminal enables real-time transmission of detection data to a remote terminal for analysis and display, meeting the application needs in complex scenarios. Attached Figure Description

[0034] Figure 1 This is a block diagram of the overall structure of a nitrogen oxide detection device;

[0035] Figure 2 This is a block diagram of the internal structure of the gas acquisition module of a nitrogen oxide detection device.

[0036] Figure 3 This is a structural block diagram of a signal conversion module for a nitrogen oxide detection device;

[0037] Figure 4 This is a structural block diagram of a feedback control module for a nitrogen oxide detection device.

[0038] Figure 5 A structural block diagram of an expansion module for a nitrogen oxide detection device;

[0039] Figure 6 This is a structural block diagram of an environmental compensation module for a nitrogen oxide detection device.

[0040] Figure 7 This is a structural block diagram of a wireless communication and alarm module for a nitrogen oxide detection device.

[0041] The attached figures are labeled as follows:

[0042] 1. Gas acquisition module; 2. Signal conversion module; 3. Data processing module; 4. Feedback control module; 5. Porous filter assembly; 6. Gas sensing probe; 7. Sealing ring; 8. Environmental compensation module; 9. Display module; 10. Storage module; 11. Wireless communication module; 12. Alarm module. Detailed Implementation

[0043] This utility model provides a nitrogen oxide detection device, the specific implementation of which is described in conjunction with the appendix. Figure 1 and attached Figure 2 Detailed explanation follows. (Attached) Figure 1 This is a structural block diagram of the present invention, showing the connection relationship between the gas acquisition module 1, signal conversion module 2, data processing module 3, and feedback control module 4, as well as the functional layout of the environmental compensation module 8, display module 9, storage module 10, wireless communication module 11, and alarm module 12. (Attached) Figure 2 This is a partial cross-sectional view of the gas acquisition module 1, showing in detail the mounting structure of the porous filter assembly 5 and the gas sensing probe 6, including the threaded connection between them and the position of the sealing ring 7.

[0044] The gas acquisition module 1 is one of the core components of the entire device, mainly composed of a porous filter assembly 5 and a gas sensing probe 6. The porous filter assembly 5 is installed at the air inlet of the gas acquisition module 1 to filter particulate matter from the gas entering the module. (See attached image) Figure 2As shown, the porous filter assembly 5 and the gas sensing probe 6 are fixed together by a threaded connection, and a sealing ring 7 is provided at their contact surface to prevent gas leakage. This design ensures that particulate matter is effectively filtered during gas collection, avoiding interference from particulate matter with subsequent detection results. The gas sensing probe 6 is located behind the porous filter assembly 5 and is in direct contact with the filtered gas to detect the concentration of nitrogen oxides in the gas. The output end of the gas sensing probe 6 is connected to the input end of the signal conversion module 2 via a wire, transmitting the detected gas concentration information to the signal conversion module 2.

[0045] Signal conversion module 2 consists of an electrochemical sensor and an analog-to-digital converter (ADC). The input of the electrochemical sensor is connected to the gas sensing probe 6, converting the nitrogen oxide concentration information detected by the gas sensing probe 6 into an analog current signal. This analog current signal is then transmitted to the ADC, which converts it into a digital signal and transmits it to the data processing module 3. The output of signal conversion module 2 is connected to the input of data processing module 3 via a wire, thus realizing the conversion of gas concentration information from analog to digital signals.

[0046] The feedback control module 4 includes a microprocessor and an adjustment switch. The input of the microprocessor is connected to the output of the gas acquisition module 1, receiving the initial gas concentration information acquired by the gas acquisition module 1. The microprocessor determines whether the operating parameters of the electrochemical sensor need adjustment according to preset rules. If adjustment is needed, the microprocessor changes the power supply voltage of the electrochemical sensor through the adjustment switch, thereby optimizing its sensitivity. One end of the adjustment switch is connected to the output of the microprocessor, and the other end is connected to the electrochemical sensor in the signal conversion module 2, forming a complete feedback control loop. This design allows the electrochemical sensor to dynamically adjust its operating state according to actual detection needs, thereby improving detection accuracy.

[0047] The environmental compensation module 8 consists of a temperature and humidity sensor and a compensation algorithm unit. The temperature and humidity sensor is installed outside the housing of the gas acquisition module 1 and is used to detect ambient temperature and humidity. The output of the temperature and humidity sensor is connected to the input of the compensation algorithm unit, which in turn is connected to the input of the data processing module 3. The compensation algorithm unit generates correction coefficients based on the environmental parameters detected by the temperature and humidity sensor and transmits these coefficients to the data processing module 3 to correct the nitrogen oxide concentration value. This design effectively eliminates the influence of changes in ambient temperature and humidity on the detection results, further improving the accuracy of the detection results.

[0048] Display module 9 and storage module 10 are respectively connected to data processing module 3. The input terminal of display module 9 is connected to the output terminal of environmental compensation module 8, and is used to display the corrected nitrogen oxide concentration value in real time. The input terminal of storage module 10 is connected to the output terminal of data processing module 3, and is used to record all data during the detection process, including the original gas concentration information, the corrected concentration value, and environmental parameters. This design not only allows users to view the detection results in real time, but also provides a complete historical record for subsequent data analysis.

[0049] The input terminal of the wireless communication module 11 is connected to the output terminal of the data processing module 3, and the output terminal is connected to the remote monitoring terminal. The wireless communication module 11 transmits the nitrogen oxide concentration data generated by the data processing module 3 to the remote monitoring terminal in real time. The remote monitoring terminal analyzes the received data and generates a visualization chart. This design enables remote transmission and real-time monitoring of detection data, meeting the application needs in complex scenarios.

[0050] The input terminal of the alarm module 12 is connected to the output terminal of the data processing module 3, and the output terminal is equipped with an audible and visual alarm. When the nitrogen oxide concentration exceeds a preset threshold, the alarm module 12 triggers the audible and visual alarm to issue an alarm signal. This design can promptly remind users to take appropriate measures when the nitrogen oxide concentration is abnormal, ensuring environmental safety.

[0051] The power management module provides stable power support for the entire device. Its input is connected to an external power source, and its outputs are connected to the gas acquisition module 1, signal conversion module 2, data processing module 3, and feedback control module 4, respectively. The power management module distributes and stabilizes the power supply voltage to each module, ensuring that the entire device can operate normally under different working conditions.

[0052] The specific implementation process of this utility model is as follows: First, the gas to be detected enters the device through the inlet of the gas acquisition module 1, and after being filtered by the porous filter component 5, it enters the gas sensing probe 6 for nitrogen oxide concentration detection. The gas sensing probe 6 transmits the detected concentration information to the signal conversion module 2, which converts the information into a digital signal and transmits it to the data processing module 3. At the same time, the feedback control module 4 determines whether the operating parameters of the electrochemical sensor need to be adjusted based on the initial gas concentration information obtained by the gas acquisition module 1, and dynamically adjusts its power supply voltage by adjusting the switch. The temperature and humidity sensor in the environmental compensation module 8 detects the ambient temperature and humidity, and the compensation algorithm unit generates a correction coefficient based on the detection results and corrects the nitrogen oxide concentration value. The corrected concentration value is displayed in real time by the display module 9, and the storage module 10 records all detection data. The wireless communication module 11 transmits the detection data to the remote monitoring terminal in real time for analysis and display. When the nitrogen oxide concentration exceeds the preset threshold, the alarm module 12 triggers the audible and visual alarm to issue an alarm signal. The entire device operates stably with the support of the power management module, completing the task of high-precision detection and real-time monitoring of nitrogen oxide concentration.

[0053] To enable those skilled in the art to fully understand and implement this utility model, the following supplementary explanation of the specific implementation principle of this utility model is provided in conjunction with a specific application scenario.

[0054] In an industrial emissions monitoring scenario, a nitrogen oxide (NOx) detector is installed at the end of a factory's emission pipeline to monitor the NOx concentration in the emitted gas in real time. This scenario requires the detector to have high accuracy, rapid response, and remote monitoring capabilities to meet the stringent regulatory requirements of environmental protection departments for emissions data.

[0055] First, the gas to be detected enters the device through the inlet of the gas acquisition module 1, and the porous filter assembly 5 effectively filters the particulate matter in the gas. (See attached image) Figure 2 As shown, the porous filter assembly 5 is fixed to the gas sensing probe 6 via a threaded connection, and a sealing ring 7 is provided on the contact surface to ensure that the gas does not leak. The filtered gas enters the gas sensing probe 6, which directly contacts the gas to detect the concentration of nitrogen oxides. During this process, the design of the porous filter assembly 5 avoids interference from particulate matter with the gas sensing probe 6, thereby improving detection accuracy. The gas sensing probe 6 transmits the detected concentration information to the signal conversion module 2.

[0056] The electrochemical sensor in signal conversion module 2 receives the concentration information transmitted by gas sensing probe 6 and converts it into an analog current signal. This analog current signal is then transmitted to the analog-to-digital converter (ADC), which converts it into a digital signal and transmits it to data processing module 3. This process achieves accurate conversion of gas concentration information from analog to digital signals, providing a reliable foundation for subsequent data processing.

[0057] Meanwhile, the microprocessor in the feedback control module 4 receives the initial gas concentration information acquired by the gas acquisition module 1 and determines whether the operating parameters of the electrochemical sensor need to be adjusted according to preset rules. If the detected initial gas concentration is too high or too low, the microprocessor adjusts the power supply voltage of the electrochemical sensor by adjusting a switch, thereby optimizing its sensitivity. This dynamic adjustment mechanism enables the electrochemical sensor to adapt to the detection requirements of different concentration ranges, further improving detection accuracy and response speed.

[0058] The temperature and humidity sensor in the environmental compensation module 8 is installed outside the housing of the gas acquisition module 1 to detect ambient temperature and humidity in real time. The sensor transmits the detected environmental parameters to the compensation algorithm unit, which generates correction coefficients based on these parameters and transmits these coefficients to the data processing module 3. The data processing module 3 uses the correction coefficients to correct the nitrogen oxide concentration value, thereby eliminating the influence of changes in ambient temperature and humidity on the detection results. This design ensures the accuracy of the detection results under complex environmental conditions.

[0059] The corrected nitrogen oxide concentration value is displayed in real time via display module 9 for easy viewing by on-site operators. Simultaneously, storage module 10 records all data from the detection process, including original gas concentration information, corrected concentration values, and environmental parameters. This data provides a complete historical record for subsequent analysis and traceability.

[0060] The wireless communication module 11 transmits the nitrogen oxide concentration data generated by the data processing module 3 to the remote monitoring terminal in real time. The remote monitoring terminal analyzes the received data and generates visual charts, facilitating remote monitoring and management of emission data by environmental protection departments. When the nitrogen oxide concentration exceeds a preset threshold, the alarm module 12 triggers an audible and visual alarm to alert on-site personnel to take timely measures to ensure environmental safety.

[0061] Throughout the testing process, the power management module provides stable power support to all modules, ensuring the device operates normally under different working conditions. For example, when the device is under high load, the power management module distributes and stabilizes the power supply voltage to each module, preventing test failures due to voltage fluctuations.

[0062] Through the above steps, the nitrogen oxide detection device of this invention achieves high-precision detection, rapid response, and remote monitoring in industrial emission monitoring scenarios. Specifically, the porous filter component 5 in the gas acquisition module 1 effectively reduces the interference of particulate matter on the detection results; the feedback control module 4 optimizes the detection sensitivity by dynamically adjusting the operating parameters of the electrochemical sensor; the environmental compensation module 8 improves the accuracy of the detection results by correcting for ambient temperature and humidity; and the introduction of the wireless communication module 11 and the remote monitoring terminal meets the real-time monitoring requirements in complex scenarios. The entire device operates stably with the support of the power management module, completing the tasks of high-precision detection and real-time monitoring of nitrogen oxide concentration.

[0063] All content not described in detail in this specification is prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are prior art, and will not be described further here.

[0064] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A nitrogen oxide detection device, characterized in that, include: The system comprises a gas acquisition module (1), a signal conversion module (2), a data processing module (3), and a feedback control module (4). The input of the feedback control module (4) is connected to the gas acquisition module (1), and the output is connected to the signal conversion module (2). The feedback control module (4) is configured to receive the initial gas concentration information acquired by the gas acquisition module (1) and adjust the working state of the signal conversion module (2) according to a preset rule. The input of the signal conversion module (2) is connected to the gas acquisition module (1), and the output is connected to the data processing module (3). The signal conversion module (2) is configured to convert the gas concentration information acquired by the gas acquisition module (1) into an electrical signal and transmit it to the data processing module (3).

2. The nitrogen oxide detection device as described in claim 1, characterized in that, The gas acquisition module (1) includes a porous filter assembly (5) and a gas sensing probe (6); the porous filter assembly (5) is installed at the air inlet of the gas acquisition module (1) and is used to filter particulate matter from the gas entering the gas acquisition module (1); the gas sensing probe (6) is located behind the porous filter assembly (5) and is used to detect the concentration of nitrogen oxides in the gas; the porous filter assembly (5) and the gas sensing probe (6) are fixed by a threaded connection and a sealing ring (7) is provided between them.

3. The nitrogen oxide detection device as described in claim 2, characterized in that, The signal conversion module (2) includes an electrochemical sensor and an analog-to-digital converter; the input end of the electrochemical sensor is connected to the gas sensing probe (6), and the output end is connected to the analog-to-digital converter; the output end of the analog-to-digital converter is connected to the data processing module (3).

4. The nitrogen oxide detection device as described in claim 1, characterized in that, The feedback control module (4) includes a microprocessor and an adjustment switch; the input end of the microprocessor is connected to the gas acquisition module (1), and the output end is connected to the adjustment switch; the other end of the adjustment switch is connected to the signal conversion module (2).

5. The nitrogen oxide detection device as described in claim 1, characterized in that, Also includes: The system includes an environmental compensation module (8), a display module (9), and a storage module (10). The input end of the environmental compensation module (8) is connected to the data processing module (3), and the output end is connected to the display module (9). The input end of the storage module (10) is connected to the data processing module (3).

6. The nitrogen oxide detection device as described in claim 5, characterized in that, The environmental compensation module (8) includes a temperature and humidity sensor and a compensation algorithm unit. The temperature and humidity sensor is installed outside the housing of the gas acquisition module (1) and is used to detect the ambient temperature and humidity. The input end of the compensation algorithm unit is connected to the temperature and humidity sensor, and the output end is connected to the data processing module (3).

7. The nitrogen oxide detection device as described in claim 1, characterized in that, Also includes: The wireless communication module (11) and the alarm module (12) are provided. The input end of the wireless communication module (11) is connected to the data processing module (3), and the output end is used to connect to the remote monitoring terminal. The input end of the alarm module (12) is connected to the data processing module (3), and the output end is equipped with an audible and visual alarm.

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