A NCUC bus measurement system and online data detection method

Abstract

The invention discloses an online data detection method for an NCUC bus type measurement system, and belongs to the technical field of data detection for NCUC bus type measurement system. S1, I / O data acquisition: using an I / O module to acquire sensor equipment data, including current, voltage and ambient temperature data; data transmission: transmitting the acquired data to a main control unit of the NCUC system through a communication module; temperature judgment and temperature compensation: setting an ambient temperature threshold, when the ambient temperature exceeds the threshold, turning on an exhaust fan for temperature compensation, lowering the ambient temperature, and returning the ambient temperature to normal; signal conversion: the main control unit converts the data into a digital signal, and then amplifies and filters the data; an NCUC bus type measurement system and an online data detection method are invented, which reduce the influence of the ambient temperature on the sensor, automatically calibrate the sensor, adjust the gain of the signal amplifier and the parameters of the filter, reduce the data error of the online detection, and make the data more accurate.

Description

Technical Field

[0001] The invention belongs to the technical field of data detection of NCUC bus type measurement system, in particular to an NCUC bus type measurement system and an online data detection method. Background Art

[0002] NCUC bus measurement system is a system that realizes data communication between various sensors, instruments and control units through bus structure. This system uses standardized communication protocols to realize information exchange and control operations between devices. At the same time, NCUC bus measurement system connects different measurement sensors and control modules together through bus structure to realize centralized data collection and management.

[0003] However, when the existing NCUC bus-type measurement system performs online data detection, it usually only has the function of directly collecting data from different sensors and directly performing detection. This direct detection method does not take into account the impact of ambient temperature on the sensor. When the ambient temperature is high, it will affect the accuracy of the data. At the same time, when the data is abnormal, it does not have the function of automatic sensor calibration and adjustment of the gain of the signal amplifier and the parameters of the filter. Therefore, an NCUC bus-type measurement system and an online data detection method are proposed. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an NCUC bus measurement system and an online data detection method, so that the online detected data is more accurate.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An online data detection method for an NCUC bus type measurement system specifically comprises the following steps:

[0007] S1, I / O data acquisition: Use I / O modules to collect sensor device data, including current, voltage, and ambient temperature data;

[0008] S2, data transmission: the collected data is transmitted to the main control unit of the NCUC system through the communication module;

[0009] S3, temperature judgment and temperature compensation: set an ambient temperature threshold. When the ambient temperature exceeds the threshold, turn on the exhaust fan for temperature compensation to lower the ambient temperature. After the ambient temperature returns to normal, further process the data.

[0010] S4, signal conversion: the main control unit converts the data into digital signals, and then amplifies and filters the data;

[0011] S5. Online data detection: Detect and analyze the processed current and voltage data. When the data is abnormal, generate instructions and transmit them to the slave control module to automatically calibrate the sensor and adjust the gain of the signal amplifier and the parameters of the filter. After the calibration and adjustment are completed, data collection is performed again.

[0012] Furthermore, the I / O data acquisition: using the I / O module to collect sensor device data, including current, voltage and ambient temperature data processing process is as follows:

[0013] S11, acquiring analog signal data from the current sensor, the voltage sensor, and the temperature sensor, and connecting the analog signal output by the sensor to the input port of the I / O data acquisition module.

[0014] By connecting the analog signal of the sensor to the I / O module, the current, voltage, and ambient temperature data measured by the sensor can be obtained in real time.

[0015] Furthermore, the data transmission: the process of transmitting the collected data to the main control unit of the NCUC system through the communication module is as follows:

[0016] S21. Use the selected communication module to establish a connection and transmit the sensor data to the main control unit of the NCUC system.

[0017] The transmission module can reliably transmit the data collected from the sensor to the main control unit of the NCUC system, ensuring the accuracy and real-time performance of the sensor data.

[0018] Furthermore, the temperature judgment and temperature compensation: an ambient temperature threshold is set. When the ambient temperature exceeds the threshold, the exhaust fan is turned on for temperature compensation to lower the ambient temperature. After the ambient temperature returns to normal, the data is further processed as follows:

[0019] S31, an ambient temperature threshold value f is preset, and the temperature of the received temperature sensor data is p. When p<f, it indicates that the ambient temperature of the sensor is within a normal range, and the current sensor and voltage sensor data will be processed in the next step;

[0020] When S32 and p>f, it means that the ambient temperature of the sensor is higher than the normal range. At this time, the main control unit will send a temperature compensation instruction to the slave control unit. The slave control unit executes the temperature compensation instruction, including turning on the exhaust fan to lower the temperature of the environment where the sensor is located. After the ambient temperature returns to normal, the current sensor and voltage sensor data are processed in the next step.

[0021] The exhaust fan increases the air flow rate, thereby reducing the overall temperature of the sensor environment.

[0022] Furthermore, when p>f, it means that the ambient temperature of the sensor is higher than the normal range. At this time, the master control unit will send a temperature compensation instruction to the slave control unit, and the slave control unit executes the temperature compensation instruction, including turning on the exhaust fan to reduce the temperature of the environment where the sensor is located. After the ambient temperature is normal, the current sensor and voltage sensor data are processed in the next step. The processing process is as follows:

[0023] S321, the main control unit sends a temperature compensation instruction to the slave control unit, the slave control unit receives the temperature compensation instruction and executes the temperature compensation instruction: the preset temperature compensation time is t1, the exhaust fan is turned on, and when the actual compensation time t exceeds the compensation time t1, the ambient temperature, current and voltage data are collected again, and the ambient temperature data is compared with the threshold value f again. When the ambient temperature data is less than the threshold value f, the current and voltage data are processed in the next step. When the ambient temperature data is greater than the threshold value f, the above steps are repeated again until the ambient temperature drops below the threshold value f.

[0024] By judging the temperature, we can avoid inaccurate data caused by environmental influences in advance and improve the accuracy of the data.

[0025] Furthermore, the signal conversion: the main control unit converts the data into a digital signal, and then amplifies and filters the data. The processing process is as follows:

[0026] S41, the main control unit converts the analog current and voltage signals into digital signals through an analog-to-digital converter;

[0027] S42, amplifying the current and voltage data converted into digital signals to enhance the amplitude of the signals;

[0028] S43. Use high-pass filtering to filter the data to reduce noise and interference in the signal.

[0029] Digital signals are easy to store, transmit and process. They can be seamlessly integrated with modern digital electronic systems and can also improve the overall efficiency and response speed of the system.

[0030] Furthermore, the data is filtered using high-pass filtering to reduce noise and interference in the signal. The processing process is as follows:

[0031] S431, select a high-pass filter and determine the cutoff frequency of the filter, then apply the high-pass filter to the digital signal. The filter reduces the baseline drift or low-frequency noise in the signal by reducing the low-frequency components. The transfer function of the high-pass filter is It can be expressed as: ;in, is the cut-off frequency of the filter.

[0032] High-pass filtering allows high-frequency signals to pass through and blocks low-frequency signals, and is often used to remove or reduce low-frequency components in signals and retain high-frequency signals.

[0033] Furthermore, the online data detection: the processed current and voltage data are detected and analyzed. When the data is abnormal, an instruction is generated and transmitted to the slave control module to automatically calibrate the sensor and adjust the gain of the signal amplifier and the parameters of the filter. After the calibration and adjustment are completed, the data collection and processing process is performed again as follows:

[0034] S51, analyzing the processed current and voltage data, presetting a normal current and voltage value threshold range, the current threshold range is I1, the voltage threshold range is V1, and abnormal judgment is made on the current and voltage data:

[0035] When the actual current data ∉I1 and the actual voltage data ∈V1, it is judged as data abnormality;

[0036] When the actual current data ∉I1 and the actual voltage data ∉V1, it is judged as data abnormality;

[0037] When the actual current data ∈ I1 and the actual voltage data ∉ V1, it is judged as data abnormality;

[0038] When the actual current data ∈I1 and the actual voltage data ∈V1, the data is judged to be normal;

[0039] When the data is normal, the normal current and voltage data are used as the final data detection results. When the data is abnormal, the main control unit module generates instructions for automatic sensor calibration and adjustment of the signal amplifier gain and filter parameters, and transmits the instructions to the slave control unit module for execution. After the sensor calibration and signal processing parameter adjustment are completed, data collection is performed again.

[0040] The purpose of calibrating the sensor is to determine whether there is any abnormality in the sensor. The purpose of adjusting the gain of the signal amplifier and the parameters of the filter is to optimize signal processing and data quality and improve the overall performance and responsiveness of the system.

[0041] Furthermore, the main control unit module generates instructions for automatic sensor calibration and adjusting the gain of the signal amplifier and the parameters of the filter as follows:

[0042] S511, according to the preset current and voltage sensor calibration procedure, monitoring the output response of the current and voltage sensor: inputting specific current and voltage signals to the current and voltage sensors respectively, and then checking the output signals of the current and voltage sensors to determine the working state of the current and voltage sensors;

[0043] S512, adjusting the gain of the signal amplifier according to a preset amplifier gain adjustment scheme: gradually adjusting the gain value of the amplifier, while observing the output of the signal amplifier, and ensuring that the amplitude of the output signal meets expectations;

[0044] S513. Adjust the filter parameters according to the preset filtering scheme: gradually adjust the cutoff frequency, bandwidth, passband gain, and stopband attenuation, and observe the changes in the signal after the filter output. Finally, ensure that the adjusted filtering effect is stable.

[0045] An NCUC bus type measurement system, comprising an I / O data acquisition module, a communication module, a main control unit module, a slave control unit module, and a power supply module, wherein the I / O data acquisition module, the communication module, the main control unit module, and the slave control unit module are sequentially connected in communication;

[0046] The I / O data acquisition module is responsible for connecting to the sensor interface, processing input and output signals, and collecting sensor signals;

[0047] The communication module is responsible for the communication function between modules, and the data is transmitted to the main control unit of the NCUC system through the communication module;

[0048] The main control unit module is the main control unit of the NCUC system, responsible for the control and coordination of the entire system, including data processing and command generation;

[0049] The slave control unit module is used to receive and execute commands issued by the master control unit on the bus network;

[0050] The power supply module supplies power to each module of the system to ensure the normal operation of each module.

[0051] The collaboration between these modules can make the NCUC bus measurement system run efficiently and realize its designed functions.

[0052] Compared with the prior art, the present invention has the following beneficial effects:

[0053] First, judging the environmental data and performing temperature compensation can effectively reduce the impact of the ambient temperature on the sensor: when the ambient temperature is abnormal, other sensor data collected at the same time will be directly discarded, and the data collected under abnormal temperature environment will not be further processed, which can also save unnecessary calculation steps, simplify operations, and save computing resources. At the same time, the main control unit module will generate a temperature compensation instruction, start the exhaust fan, and cool down the environment where the sensor is located, ensuring that the sensor collects data at normal ambient temperature, so that the online detection data will not be inaccurate due to temperature reasons;

[0054] By detecting and analyzing online data, when the data is abnormal, the sensor will be automatically calibrated according to the preset plan and the signal amplifier gain and filter parameters will be adjusted. Automatic sensor calibration can ensure that the online detection data will not be inaccurate due to sensor problems. Automatic adjustment of signal amplifier gain and filter parameters can optimize signal processing and data quality, improve system response, and facilitate data collection again.

[0055] This online data detection method can reduce the impact of ambient temperature on the sensor, and can also automatically calibrate the sensor and adjust the signal amplifier gain and filter parameters, reducing the error of online monitoring data and improving the accuracy and precision of the data. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 The present invention is a block diagram of an online data detection method of an NCUC bus type measurement system.

[0057] Figure 2 It is a module diagram of an NCUC bus measurement system of the present invention. DETAILED DESCRIPTION

[0058] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] like Figure 1-Figure 2 As shown, an online data detection method for an NCUC bus-type measurement system specifically includes the following steps:

[0060] S1, I / O data acquisition: Use I / O modules to collect sensor device data, including current, voltage, and ambient temperature data;

[0061] In this embodiment, the I / O data acquisition: using the I / O module to collect sensor device data, including current, voltage and ambient temperature data processing process is as follows:

[0062] S11, acquiring analog signal data from the current sensor, the voltage sensor, and the temperature sensor, and connecting the analog signal output by the sensor to the input port of the I / O data acquisition module.

[0063] It should be noted that the voltage sensor and current sensor measure the current and voltage data of the equipment under test. By monitoring the current and voltage of electrical equipment, potential failures of the equipment can be discovered in advance, and the efficiency and working condition of the equipment can be evaluated.

[0064] The temperature sensor measures the ambient temperature near the sensor. The ambient temperature will affect the sensor, making the data detected by the sensor inaccurate.

[0065] S2, data transmission: the collected data is transmitted to the main control unit of the NCUC system through the communication module;

[0066] In this embodiment, the data transmission: the process of transmitting the collected data to the main control unit of the NCUC system through the communication module is as follows:

[0067] S21. Use the selected communication module to establish a connection and transmit the sensor data to the main control unit of the NCUC system.

[0068] It should be noted that the communication module plays an important role in the process of transmitting sensor data to the main control unit of the NCUC system, which helps to ensure the smooth transmission of data and the normal operation of the system.

[0069] S3, temperature judgment and temperature compensation: set an ambient temperature threshold. When the ambient temperature exceeds the threshold, turn on the exhaust fan for temperature compensation to lower the ambient temperature. After the ambient temperature returns to normal, further process the data.

[0070] In this embodiment, the temperature judgment and temperature compensation are as follows: an ambient temperature threshold is set. When the ambient temperature exceeds the threshold, the exhaust fan is turned on for temperature compensation to lower the ambient temperature. After the ambient temperature returns to normal, the data is further processed.

[0071] S31, an ambient temperature threshold value f is preset, and the temperature of the received temperature sensor data is p. When p<f, it indicates that the ambient temperature of the sensor is within a normal range, and the current sensor and voltage sensor data will be processed in the next step;

[0072] When S32 and p>f, it means that the ambient temperature of the sensor is higher than the normal range. At this time, the main control unit will send a temperature compensation instruction to the slave control unit. The slave control unit executes the temperature compensation instruction, including turning on the exhaust fan to lower the temperature of the environment where the sensor is located. After the ambient temperature returns to normal, the current sensor and voltage sensor data are processed in the next step.

[0073] In this embodiment, when p>f, it means that the ambient temperature of the sensor is higher than the normal range. At this time, the main control unit will send a temperature compensation instruction to the slave control unit, and the slave control unit executes the temperature compensation instruction, including turning on the exhaust fan to reduce the temperature of the environment where the sensor is located. After the ambient temperature is normal, the processing process of the current sensor and voltage sensor data is further processed as follows:

[0074] S321, the main control unit sends a temperature compensation instruction to the slave control unit, the slave control unit receives the temperature compensation instruction and executes the temperature compensation instruction: the preset temperature compensation time is t1, the exhaust fan is turned on, and when the actual compensation time t exceeds the compensation time t1, the ambient temperature, current and voltage data are collected again, and the ambient temperature data is compared with the threshold value f again. When the ambient temperature data is less than the threshold value f, the current and voltage data are processed in the next step. When the ambient temperature data is greater than the threshold value f, the above steps are repeated again until the ambient temperature drops below the threshold value f.

[0075] It should be noted that by setting preset ambient temperature thresholds and automated compensation processes, automated management of temperature control is achieved, reducing manual intervention and monitoring costs. At the same time, lowering the ambient temperature can not only make sensor data monitoring more accurate, but also protect sensor equipment and avoid possible damage or performance degradation caused by overheating.

[0076] It should be noted that by setting the temperature threshold, the data exceeding the threshold and the data not exceeding the threshold are first classified and processed, and the data exceeding the threshold is directly discarded instead of discarding the data after being processed. Therefore, the data processing steps can be simplified to avoid calculation and storage of unnecessary data.

[0077] S4, signal conversion: the main control unit converts the data into digital signals, and then amplifies and filters the data;

[0078] In this embodiment, the signal conversion: the main control unit converts the data into a digital signal, and then amplifies and filters the data as follows:

[0079] S41, the main control unit converts the analog current and voltage signals into digital signals through an analog-to-digital converter;

[0080] S42, amplifying the current and voltage data converted into digital signals to enhance the amplitude of the signals;

[0081] S43. Use high-pass filtering to filter the data to reduce noise and interference in the signal.

[0082] In this embodiment, the data is filtered using high-pass filtering to reduce noise and interference in the signal. The process is as follows:

[0083] S431, select a high-pass filter and determine the cutoff frequency of the filter, then apply the high-pass filter to the digital signal. The filter reduces the baseline drift or low-frequency noise in the signal by reducing the low-frequency components. The transfer function of the high-pass filter is It can be expressed as: ;in, is the cutoff frequency of the filter. It should be noted that the digitized signal can accurately represent the value of the original analog signal, avoiding the error and attenuation that may be introduced during the transmission of the analog signal;

[0084] Amplification increases the amplitude of a signal, making it easier to be processed and analyzed by subsequent circuits or systems.

[0085] Filtering can effectively remove noise and interference in the signal and improve the clarity and reliability of the data.

[0086] S5, online data detection: detect and analyze the processed current and voltage data. When the data is abnormal, generate instructions and transmit them to the slave control module to automatically calibrate the sensor and adjust the gain of the signal amplifier and the parameters of the filter. After the calibration and adjustment are completed, data collection is performed again;

[0087] In this embodiment, the online data detection: the processed current and voltage data are detected and analyzed. When the data is abnormal, an instruction is generated and transmitted to the slave control module to automatically calibrate the sensor and adjust the gain of the signal amplifier and the parameters of the filter. After the calibration and adjustment are completed, the data collection process is performed again as follows:

[0088] S51, analyzing the processed current and voltage data, presetting a normal current and voltage value threshold range, the current threshold range is I1, the voltage threshold range is V1, and abnormal judgment is made on the current and voltage data:

[0089] When the actual current data ∉I1 and the actual voltage data ∈V1, it is judged as data abnormality;

[0090] When the actual current data ∉I1 and the actual voltage data ∉V1, it is judged as data abnormality;

[0091] When the actual current data ∈ I1 and the actual voltage data ∉ V1, it is judged as data abnormality;

[0092] When the actual current data ∈I1 and the actual voltage data ∈V1, the data is judged to be normal;

[0093] When the data is normal, the normal current and voltage data are used as the final data detection results. When the data is abnormal, the main control unit module generates instructions for automatic sensor calibration and adjustment of the signal amplifier gain and filter parameters, and transmits the instructions to the slave control unit module for execution. After the sensor calibration and signal processing parameter adjustment are completed, data collection is performed again.

[0094] The processing process of the main control unit module generating instructions for automatic sensor calibration and adjusting the gain of the signal amplifier and the parameters of the filter is as follows:

[0095] In this embodiment, S511, according to a preset current and voltage sensor calibration procedure, monitor the output response of the current and voltage sensors: input specific current and voltage signals to the current and voltage sensors respectively, then check the output signals of the current and voltage sensors, and determine the working state of the current and voltage sensors;

[0096] It should be noted that if the calibration result shows that the sensor is abnormal or does not meet expectations, the master control unit can continue to generate instructions and require the slave control unit to adjust the parameters of the sensor again according to the specific situation.

[0097] S512, adjusting the gain of the signal amplifier according to a preset amplifier gain adjustment scheme: gradually adjusting the gain value of the amplifier, while observing the output of the signal amplifier, and ensuring that the amplitude of the output signal meets expectations;

[0098] S513, adjust the filter parameters according to the preset filtering scheme: gradually adjust the cutoff frequency, bandwidth, passband gain, stopband attenuation, and observe the changes in the signal output after the filter. Finally, ensure that the adjusted filtering effect is stable.

[0099] It should be noted that the main control unit can send instructions remotely through the network to achieve remote management and monitoring of sensor calibration and parameter adjustment, and automatically generate sensor calibration and parameter adjustment instructions, which can improve the system's automation level and make the system optimization steps more efficient.

[0100] An NCUC bus type measurement system, characterized in that it comprises an I / O data acquisition module, a communication module, a main control unit module, a slave control unit module, and a power supply module, wherein the I / O data acquisition module, the communication module, the main control unit module, and the slave control unit module are sequentially connected in communication;

[0101] The I / O data acquisition module is responsible for connecting to the sensor interface, processing input and output signals, and collecting sensor signals;

[0102] The communication module is responsible for the communication function between modules, and the data is transmitted to the main control unit of the NCUC system through the communication module;

[0103] The main control unit module is the main control unit of the NCUC system, responsible for the control and coordination of the entire system, including data processing and command generation;

[0104] The slave control unit module is used to receive and execute commands issued by the master control unit on the bus network;

[0105] The power supply module supplies power to each module of the system to ensure the normal operation of each module.

[0106] It should be noted that the main control unit module is the core control center of the entire NCUC system, responsible for data processing, algorithm execution and decision making. The main control unit module analyzes the data from the data acquisition module and generates corresponding control instructions according to the system's preset goals, thereby optimizing the system's operating status.

[0107] In the embodiments provided by the present invention, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules is only a logical function division, and there may be other division methods in actual implementation; the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the method of this embodiment.

[0108] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. An online data detection method for an NCUC bus measurement system, characterized in that: The specific steps include: S1, I / O data acquisition: Use I / O modules to collect sensor device data, including current, voltage, and ambient temperature data; S2, data transmission: the collected data is transmitted to the main control unit of the NCUC system through the communication module; S3, temperature judgment and temperature compensation: set an ambient temperature threshold. When the ambient temperature exceeds the threshold, turn on the exhaust fan for temperature compensation to lower the ambient temperature. After the ambient temperature returns to normal, further process the data. S4, signal conversion: the main control unit converts the data into digital signals, and then amplifies and filters the data; S5. Online data detection: Detect and analyze the processed current and voltage data. When the data is abnormal, generate instructions and transmit them to the slave control module to automatically calibrate the sensor and adjust the gain of the signal amplifier and the parameters of the filter. After the calibration and adjustment are completed, data collection is performed again.

2. The online data detection method of the NCUC bus measurement system according to claim 1 is characterized by: The I / O data acquisition: using the I / O module to collect sensor device data, including current, voltage and ambient temperature data processing process is as follows: S11, acquiring analog signal data from the current sensor, the voltage sensor, and the temperature sensor, and connecting the analog signal output by the sensor to the input port of the I / O data acquisition module.

3. The online data detection method of the NCUC bus measurement system according to claim 1 is characterized by: The data transmission process is as follows: the collected data is transmitted to the main control unit of the NCUC system through the communication module: S21. Use the selected communication module to establish a connection and transmit the sensor data to the main control unit of the NCUC system.

4. The online data detection method of the NCUC bus measurement system according to claim 1 is characterized by: The temperature judgment and temperature compensation: an ambient temperature threshold is set. When the ambient temperature exceeds the threshold, the exhaust fan is turned on for temperature compensation to lower the ambient temperature. After the ambient temperature returns to normal, the data is further processed as follows: S31, an ambient temperature threshold value f is preset, and the temperature of the received temperature sensor data is p. When p<f, it indicates that the ambient temperature of the sensor is within a normal range, and the current sensor and voltage sensor data will be processed in the next step; When S32 and p>f, it means that the ambient temperature of the sensor is higher than the normal range. At this time, the main control unit will send a temperature compensation instruction to the slave control unit. The slave control unit executes the temperature compensation instruction, including turning on the exhaust fan to lower the temperature of the environment where the sensor is located. After the ambient temperature returns to normal, the current sensor and voltage sensor data are processed in the next step.

5. The online data detection method of the NCUC bus measurement system according to claim 4 is characterized in that: When p>f, it means that the ambient temperature of the sensor is higher than the normal range. At this time, the master control unit will send a temperature compensation instruction to the slave control unit. The slave control unit executes the temperature compensation instruction, including turning on the exhaust fan to reduce the temperature of the environment where the sensor is located. After the ambient temperature is normal, the current sensor and voltage sensor data are processed in the next step. The processing process is as follows: S321, the main control unit sends a temperature compensation instruction to the slave control unit, the slave control unit receives the temperature compensation instruction and executes the temperature compensation instruction: the preset temperature compensation time is t1, the exhaust fan is turned on, and when the actual compensation time t exceeds the compensation time t1, the ambient temperature, current and voltage data are collected again, and the ambient temperature data is compared with the threshold value f again. When the ambient temperature data is less than the threshold value f, the current and voltage data are processed in the next step. When the ambient temperature data is greater than the threshold value f, the above steps are repeated again until the ambient temperature drops below the threshold value f.

6. The online data detection method of the NCUC bus measurement system according to claim 1 is characterized by: Signal conversion: The main control unit converts data into digital signals, and then amplifies and filters the data. The processing process is as follows: S41, the main control unit converts the analog current and voltage signals into digital signals through an analog-to-digital converter; S42, amplifying the current and voltage data converted into digital signals to enhance the amplitude of the signals; S43. Use high-pass filtering to filter the data to reduce noise and interference in the signal.

7. The online data detection method of the NCUC bus measurement system according to claim 6 is characterized by: The process of filtering the data using high-pass filtering to reduce noise and interference in the signal is as follows: S431, select a high-pass filter and determine the cutoff frequency of the filter, then apply the high-pass filter to the digital signal. The filter reduces the baseline drift or low-frequency noise in the signal by reducing the low-frequency components. The transfer function of the high-pass filter is It can be expressed as: ;in, is the cut-off frequency of the filter.

8. The online data detection method of the NCUC bus measurement system according to claim 1 is characterized by: The online data detection: detects and analyzes the processed current and voltage data. When the data is abnormal, it generates instructions and transmits them to the slave control module to automatically calibrate the sensor and adjust the gain of the signal amplifier and the parameters of the filter. After the calibration and adjustment are completed, the data collection and processing process is performed again as follows: S51, analyzing the processed current and voltage data, presetting a normal current and voltage value threshold range, the current threshold range is I1, the voltage threshold range is V1, and abnormal judgment is made on the current and voltage data: When the actual current data ∉I1 and the actual voltage data ∈V1, it is judged as data abnormality; When the actual current data ∉I1 and the actual voltage data ∉V1, it is judged as data abnormality; When the actual current data ∈ I1 and the actual voltage data ∉ V1, it is judged as data abnormality; When the actual current data ∈I1 and the actual voltage data ∈V1, the data is judged to be normal; When the data is normal, the normal current and voltage data are used as the final data detection results. When the data is abnormal, the main control unit module generates instructions for automatic sensor calibration and adjustment of the signal amplifier gain and filter parameters, and transmits the instructions to the slave control unit module for execution. After the sensor calibration and signal processing parameter adjustment are completed, data collection is performed again.

9. The online data detection method of the NCUC bus measurement system according to claim 8 is characterized by: The processing process of the main control unit module generating instructions for automatic sensor calibration and adjusting the gain of the signal amplifier and the parameters of the filter is as follows: S511, according to the preset current and voltage sensor calibration procedure, monitoring the output response of the current and voltage sensor: inputting specific current and voltage signals to the current and voltage sensors respectively, and then checking the output signals of the current and voltage sensors to determine the working state of the current and voltage sensors; S512, adjusting the gain of the signal amplifier according to a preset amplifier gain adjustment scheme: gradually adjusting the gain value of the amplifier, while observing the output of the signal amplifier, and ensuring that the amplitude of the output signal meets expectations; S513. Adjust the filter parameters according to the preset filtering scheme: gradually adjust the cutoff frequency, bandwidth, passband gain, and stopband attenuation, and observe the changes in the signal after the filter output. Finally, ensure that the adjusted filtering effect is stable.

10. An NCUC bus measurement system for implementing the online data detection method according to any one of claims 1 to 9, characterized in that: It includes an I / O data acquisition module, a communication module, a main control unit module, a slave control unit module, and a power supply module, wherein the I / O data acquisition module, the communication module, the main control unit module, and the slave control unit module are sequentially connected in communication; The I / O data acquisition module is responsible for connecting to the sensor interface, processing input and output signals, and collecting sensor signals; The communication module is responsible for the communication function between modules, and the data is transmitted to the main control unit of the NCUC system through the communication module; The main control unit module is the main control unit of the NCUC system, responsible for the control and coordination of the entire system, including data processing and command generation; The slave control unit module is used to receive and execute commands issued by the master control unit on the bus network; The power supply module supplies power to each module of the system to ensure the normal operation of each module.

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