228results about "Measuring interference from external sources" patented technology

The invention discloses a driver controller detection system, which comprises an acquisition module, an acquisition module, a processing module, an identification module, a judgment module, an analysis module and a generation module, the acquisition module captures contact information and electromagnetic interference data of contacts in real time by means of a high-dynamic voltage sensor and a broadband EMC probe; the acquisition module is triggered by a locomotive signal and records dynamic working condition data; the processing module aligns the data, performs denoising and extracts fault parameters; the identification module scans the voltage waveform and judges the transient contact failure; the judgment module monitors EMC data and compares an instruction position, and judges misoperation; the analysis module analyzes fault association, judges a composite type and triggers an alarm; the generation module generates a detection report and a log. According to the system, a multi-dimensional monitoring network is constructed under a dynamic working condition, data reliability is guaranteed, faults are accurately identified, a compound fault source is positioned, and the safety and stability of locomotive operation are improved through risk grading early warning and automatic reporting.

The invention relates to the technical field of radio orientation, in particular to an unmanned aerial vehicle flight state detection method based on a frequency spectrum detection technology, which comprises the following steps: acquiring an initial time domain signal of an initial frequency spectrum signal of an unmanned aerial vehicle in a monitoring period in a flight process; segmenting the initial time domain signal according to the flight state so as to screen out each complex change time period; performing signal decomposition on the time domain sub-signals in each complex change time period to obtain a plurality of components; and determining an interference frequency tendency index of each component, determining an interference characteristic comprehensive index of each component according to the interference frequency tendency index of each component, the oscillation intensity characteristic value and the correlation coefficient, and reconstructing the frequency spectrum sub-signal corresponding to the time domain sub-signal to obtain a target frequency spectrum signal. According to the method, the data reference value of the target spectrum signal obtained through adaptive filtering is larger, and the accuracy of detection of the flight state of the unmanned aerial vehicle is improved.

The invention relates to an electromagnetic compatibility and radio frequency coexistence framework, and belongs to the technical field of vehicle-mounted display and electromagnetic compatibility. The device comprises a display module and a control system which are arranged outside a vehicle body, the control system is provided with a cooperative control unit, an electromagnetic interference suppression module and a running state monitoring and adjusting module to form a closed-loop framework, and the closed-loop framework is used for dynamically managing display signals, power and a time sequence in the running process of the vehicle, suppressing conduction and radiation interference and controlling the running state of the vehicle. And the coexistence performance of the external display and the vehicle-mounted radio frequency system is ensured, and the electromagnetic compatibility regulations are met. Further, the system comprises an integrated topology unit, a coexistence monitoring unit and a strategy execution unit, driving time sequence shaping, backflow path constraint and power supply ripple shaping are achieved, and when interference exceeds a threshold value, the system is switched to a controlled display state. A shielding-grounding-filtering three-in-one layout and a driving time sequence shaping unit can be adopted. According to the invention, the safety and reliability of external display in the aspects of electromagnetic compatibility, radio frequency coexistence and service life management are ensured.

The invention discloses an electromagnetic compatibility detection method and device of a rail transit signal system and electronic equipment, and relates to the technical field of electromagnetic safety. Determining an actual electromagnetic compatibility area corresponding to the equipment according to the actual distance between the actual installation positions of the multiple pieces of equipment of the rail transit signal system and a target reference line on a rail; and determining the electromagnetic interference risk condition between the relation pairs based on the electromagnetic interference information of the actual electromagnetic compatibility area corresponding to the equipment. According to the method, the electromagnetic interference scene of the actual rail transit signal system is analyzed to cover the random and coexisting electromagnetic interference combination of the field, so that the confidence coefficient of the risk assessment result in the complex electromagnetic environment of the field is improved, and the analysis is ensured to cover the random and composite scene which cannot be reproduced by the standard test; moreover, the electromagnetic interference risk condition between a relation pair formed by a plurality of devices in the rail transit signal system is determined, that is, systematic evaluation of complex electromagnetic interaction is realized through system-level analysis.

The invention provides a method and system for detecting electromagnetic compatibility efficiency of a wave-absorbing material and a storage medium, and relates to the technical field of electromagnetic compatibility efficiency detection. The method comprises the following steps: firstly, carrying out first electromagnetic measurement on a target area of the electronic equipment when a wave-absorbing material is not laid to obtain a first near-field scattering parameter set; and carrying out local minimum detection and amplitude and space distribution threshold presetting on the parameter set to screen out problem resonance frequency points. And laying the to-be-measured wave-absorbing material in the target area, and carrying out second electromagnetic measurement according to the same measurement condition to obtain a second near-field scattering parameter set. And comparing the two measurement data, calculating the local variable quantity, the space average suppression degree and the peak suppression ratio of each problem resonance frequency point, and constructing a comprehensive efficiency index on the basis of the local variable quantity, the space average suppression degree and the peak suppression ratio, thereby realizing quantitative evaluation on the overall efficiency and the local hot spot suppression capability of the wave-absorbing material. And finally, judging whether the electromagnetic compatibility efficiency of the material reaches the standard or not according to the space average suppression degree and the comprehensive efficiency index. Accurate evaluation of the electromagnetic compatibility efficiency of the wave-absorbing material is realized.

The invention belongs to the technical field of electrical equipment magnetic monitoring, and discloses an electrical equipment magnetic field interference intelligent monitoring and early warning sensing system, which establishes a magnetic field, working condition, environment and space four-dimensional data sensing system and matches a bimodal separation technology. Pure magnetic field interference, working condition correlation interference, environment induced interference and space correlation interference components can be effectively separated; the generated three-dimensional traceability map can visually present the position of an interference source, a propagation path and the priority of affected equipment, and then the accuracy of interference type identification and source positioning is greatly improved in combination with a feature library covering a large amount of historical normal operation data, so that fault pre-judgment is changed from passively coping with an existing fault into actively preventing and controlling risks in advance; a dual-path active suppression mechanism is formed by combining a software compensation mode of dynamically generating a magnetic field compensation current through a PID control algorithm with a tunable magnetic shielding device hardware adjustment means configured for high-priority equipment.

The invention discloses a fault diagnosis method and device for electrical equipment, electronic equipment and a storage medium. According to an electromagnetic interference index, the data acquisition frequency and range are dynamically adjusted, high-frequency acquisition is pertinently started for state abnormal equipment so as to accurately capture abnormal signals, and multi-source data such as partial discharge pulses are fused. An equipment state feature sequence is constructed in combination with historical operation data, and high-correlation sensitive features are screened, so that the limitation of a single parameter is avoided; meanwhile, early faults are recognized and early warning is output through a pre-trained long-short-term memory neural network, a protection constant value is rechecked in cooperation with a rule engine and a convolutional neural network, a standby loop is automatically switched or the constant value is adjusted when abnormity occurs, and a complete monitoring-early warning-response closed loop is formed; the technical effects of improving the equipment state evaluation comprehensiveness, enhancing the early fault recognition capability, improving the early warning accuracy, increasing the response speed of the protection system and guaranteeing the operation safety and reliability of the electrical equipment and the power grid of the power plant are achieved.

The invention discloses a chip radiation emission test method, device and equipment and a storage medium, and relates to the technical field of chip electromagnetic compatibility design and simulation, and the method comprises the steps: constructing a target packaging body model corresponding to a to-be-tested chip; constructing a target test circuit board model corresponding to the to-be-tested chip; determining a target scattering parameter corresponding to the target to-be-measured electromagnetic structure; based on the target scattering parameters, the target to-be-tested electromagnetic structure is connected to the first simulation model, the second simulation model and a voltage source model and a current source model matched with the target to-be-tested electromagnetic structure, and a test link of the target to-be-tested electromagnetic structure is constructed; performing frequency response analysis on the test link, and determining radiation emission energy data of an output port of the transverse electromagnetic wave cell model; and generating a corresponding amplitude-frequency characteristic curve based on the radiation emission energy data. According to the method, the early simulation test of the radiation emission characteristic of the chip can be realized, and the research and development efficiency of the chip is remarkably improved.

The invention discloses an active noise reduction method and device for an automobile electromagnetic compatibility test. The method comprises the following steps: acquiring an original interference noise signal through a pre-arranged reference sensor array; processing the original interference noise signal through a pre-constructed intelligent noise reduction model to obtain a noise reduction control signal; a noise reduction signal is emitted according to the noise reduction control signal, and an electromagnetic field counteracting the original interference noise signal is formed; detecting the offset resultant field intensity signal in real time through a pre-arranged error sensor; and performing parameter optimization on the intelligent noise reduction model according to the synthesized field intensity signal. According to the method, the problem that the test accuracy is seriously influenced by environmental background noise and electromagnetic interference generated by test equipment in an automobile electromagnetic compatibility test can be solved.

The invention discloses a method, a circuit, a system and a medium for testing a total ionizing radiation dose and an electromagnetic pulse coordination effect, and relates to the technical field of anti-nuclear and radiation hardening, and the method comprises the steps: obtaining an electrical characteristic curve of a to-be-tested transistor before irradiation and a response waveform under the action of a single electromagnetic pulse; performing at least one preset dose of irradiation on the to-be-tested transistor until the accumulated irradiation dose of the to-be-tested transistor reaches the preset total dose, and obtaining an electrical characteristic curve of the to-be-tested transistor and a response waveform of the to-be-tested transistor under the action of a single electromagnetic pulse after each irradiation, obtaining an electrical characteristic curve and a response waveform of the transistor to be detected under each accumulated irradiation dose; and based on the obtained electrical characteristic curve and the response waveform, analyzing the total ionizing radiation dose of the transistor to be detected and the electromagnetic pulse coordination effect.

A method and system for testing the conversion losses of terahertz mixers capable of eliminating the influence of radio frequency sources includes grouping a mixer to be tested and at least two reference mixers in pairs; in each group, inputting a signal of a preset frequency and a preset power at an intermediate frequency port of a first mixer, and after up-conversion, outputting same to a second mixer to be down-converted, so as to obtain an output power with the frequency same as the preset frequency, and obtain the relationship between a first output power and a first preset power and the losses of two mixers; according to the relationship between the loss of the mixer in each group and the power, obtaining the loss of the mixer to be tested.

The invention provides a construction method of a virtual electromagnetic environment model and a test device. The construction method comprises the following steps: acquiring multi-dimensional test data of a mobile carrier in a target scene; taking a timestamp of the baseband signal data as a reference, performing synchronous fusion on the positioning data and the attitude data, and generating a synchronous data set; performing parameter estimation on the synchronous data set, and separating a relative channel parameter of the multipath component in a mobile carrier coordinate system; converting the relative channel parameters into absolute space parameters under a geographic coordinate system based on the instantaneous space state, and determining physical scattering source characteristics corresponding to the multipath component based on the relative channel parameters and the absolute space parameters; and generating a virtual electromagnetic environment model based on the absolute space parameters and the physical scattering source characteristics. In the mode, a structured virtual electromagnetic environment model containing absolute space attributes can be generated, and then high-fidelity digital reconstruction and reproduction of a complex dynamic electromagnetic environment in a real scene are realized.

The present invention relates to a method and an apparatus for detecting anomalies in an operation behavior of a device under test (DUT), in particular during electromagnetic susceptibility (EMS) measurements. The apparatus comprises a monitoring unit adapted to generate a first set of observation data of the operation behavior of a DUT while the DUT is not subjected to disturbances and adapted to generate a second set of observation data of the operation behavior of a DUT while the DUT is subjected to disturbances and comprising an AI module trained with the first set of observation data generated by the monitoring unit and adapted to process the second set of observation data to detect anomalies in the operation behavior of the DUT while being subjected to the disturbances and comprising a reporting unit adapted to reporting anomalies in the operation behavior of the DUT detected by the trained AI module.

The invention discloses an intelligent debugging system and process for a power distribution automation remote terminal, and belongs to the technical field of power distribution automation testing. An intelligent debugging system for a distribution automation remote terminal comprises a test box, a relay output test module, a relay output test module, a relay output test module and a relay output test module, wherein the inner side wall of the test box is provided with a power supply; the two sides of the test box are provided with openings communicated with an inner cavity of the test box; the relay output test module is fixedly arranged on the inner side wall of the test box and is used for testing the remote signaling acquisition precision and the response speed of the FTU; the central processing module is fixedly mounted on the inner side wall of the test box; through automatic testing, scene precise adaptation and intelligent data processing, the outdoor FTU testing efficiency, precision and safety are greatly improved, environmental limitation, manual errors and high-risk pain points are effectively solved, and intelligent support is provided for reliability verification of the power distribution terminal.

The invention provides an emergency evacuation method for an electromagnetic compatibility test of a power battery, and the method comprises an environment monitoring module, a water tank emergency protection module, a box moving robot system module, a test wire harness cut-off module, a test room control module, a control box module, and an electromagnetic compatibility test equipment protection module. And all the modules realize safety protection in an emergency scene through signal interaction and action linkage. Through cooperation of multiple modules, the single-dimension limitation of traditional protection is broken through, personnel-equipment-environment triple guarantee is constructed, a full-chain safety closed loop is formed, a full-automatic emergency evacuation process is achieved, manual intervention is not needed from emergency situation detection to transfer of a power battery to a safety area, and the evacuation efficiency and safety are improved.

The invention provides a hiding device for a test darkroom and the test darkroom. The top of the test darkroom is provided with a hiding parking area. The hiding device comprises a lifting mechanism, a turnover mechanism and a control system, and the lifting mechanism and the turnover mechanism can jointly form a closed wave-absorbing shielding surface through the control system so as to shield interference sources such as travelling vehicles in the hidden parking area. Driving or similar electromagnetic test interference sources can be effectively shielded and shielded, and the influence of the structure on the electromagnetic environment of the test darkroom is reduced.

The application discloses an EMC interference source rapid positioning method, system and equipment, and relates to the electrical measurement technical field.The method comprises the following steps: based on the electromagnetic interference signal conduction path and the radiation path of the measured equipment, a monitoring sensor network is laid out; the monitoring sensor network is connected, and interference signal data of the measured equipment is collected in real time; the collected interference signal data is subjected to frequency spectrum analysis and interference type determination; the data collection mark bit is used as a positioning engine, adaptive interference tracking analysis is carried out according to the determined interference type, and interference source positioning results are obtained.The application solves the technical problems that the existing electromagnetic interference source positioning method cannot position the interference source in real time when the equipment is normally operated, and the positioning efficiency is low and the accuracy is poor, and achieves the technical effect that adaptive tracking analysis is carried out through real-time collection of interference signal data, and efficient and accurate interference source positioning is realized under the normal operation state of the equipment.

The invention discloses a multi-frequency point calibration test method and system for 0-10 Hz ultralow frequency magnetic field immunity. The method comprises the steps of system building, single frequency point reference calibration, test execution and exception handling. When the system is built, the hardware modules are connected according to a specific mode; in the calibration stage, references are established for frequency points of 2Hz, 4Hz, 6Hz and 8Hz; during testing, precise field intensity control and data recording are realized through combination of coarse adjustment and fine adjustment; and verifying the probe position when abnormity occurs. The system comprises an arbitrary function generator, a power amplifier, a radiation ring and a gauss meter, and parameters of each module are adaptive to a frequency band of 0-10Hz. The field intensity larger than or equal to 1000 A / m can be stably generated, the testing precision is improved, the 0-10 Hz frequency band standard testing blank is filled, and the device is suitable for electronic equipment testing in the fields of industrial automation, new energy automobiles and the like.

The invention relates to the technical field of pulse trigger circuits, in particular to a transient high-frequency pulse waveform capturing method of a pulse trigger circuit, which comprises the following steps: acquiring a first sampling signal sequence and a second sampling signal sequence; determining a plurality of prediction sampling signals in a future preset time period based on the first sampling signal sequence so as to determine a prediction trigger characterization value; determining a plurality of key sampling signals in a target time period based on the second sampling signal sequence so as to determine a key trigger characterization value; judging whether a pre-trigger signal is generated or not based on the predicted trigger characterization value and the key trigger characterization value; in response to generation of the pre-trigger signal, obtaining a plurality of continuous sampling signals based on the second sampling signal sequence to determine a signal stability degree value; and determining a waveform generation mode based on a comparison result of the signal stability degree value and a preset stability degree value. The transient high-frequency pulse waveform capture false triggering rate can be reduced, and the waveform capture rate and the waveform integrity are ensured.

To provide an EMC countermeasure presentation system capable of efficiently extracting and presenting an emission countermeasure case in another field and another model with high similarity (countermeasure effectiveness) in consideration of a device configuration of an electronic apparatus.SOLUTION: A similar configuration extraction unit 3 configured to extract, based on device configuration data 11 at the time of noise measurement, device configuration data at a short distance by configuration learning data 9 obtained by learning a graph model representing a device configuration when the noise countermeasure and reduction amount frequency data is acquired; and a countermeasure estimation unit 4 configured to estimate, from data obtained from the reduction countermeasure extraction unit and the similar configuration extraction unit, a recommended countermeasure content having a high degree of similarity of a device connection configuration and expected to have an excessive noise reduction effect.SELECTED DRAWING: Figure 1

This invention discloses a near-field scanning detection method based on active learning to obtain conducted coupling paths. The method includes: constructing a near-field scanning detection platform; placing the circuit board under test (PCB) in a microwave anechoic chamber; and using the near-field scanning detection platform directly above the PCB to perform detection; obtaining the detection results using an active learning-based near-field scanning method; and obtaining a near-field current distribution map on the PCB at continuous time intervals based on the detection results, thereby realizing the detection of conducted coupling paths. This invention utilizes active machine learning methods to achieve more efficient near-field scanning detection, concentrating scanning points in areas with strong currents and accurately reconstructing the actual current changes of the PCB using the scan results of sparse points, greatly improving detection efficiency. By using near-field scanning detection to reconstruct the current changes on the circuit board, the coupling paths of conducted interference currents on the PCB can be quickly analyzed, meeting the requirements for detecting electromagnetic interference in systems in practical engineering.

The disclosure describes a method, a device, and a system for processing transmission line pulse data. In the method, the component characteristic of a protection component is determined. A voltage-current characteristic generated by applying transmission pulses to the protection component is analyzed based on the transmission line pulse data of the protection component. Based on the design window such as an operation voltage value, a breakdown voltage value, and a required current capability, a corresponding visual graph is generated to determine the characteristic, advantages, and disadvantages of the protection component more accurately.

A test system performs ESD (electrostatic discharge) verification of a circuit definition. The system performs a bottom-up ESD analysis to generate a verified IO (input / output) instance, and then performs a top-down ESD analysis based on multiple instances of the verified IO instance. The system generates an ESD verification model 10 instance with ESD protection circuitry and the ESD victim circuitry as separate cells at the same level of verification hierarchy, and verifies the model IO instance at a worst case connection test case. The system then scales out the IO instance into an array of instances to verify ESD protection between the model IO instances.

The invention relates to a method, a system and a probe for measuring and visualizing values of electromagnetic parameters of a PCB, wherein a probe head of the probe non-contact measures values of at least one electromagnetic parameter at at least two different locations of the PCB; a camera fixed in place relative to the probe head records an image of an area of the PCB around the probe head for each of the different locations; for each of the different locations, the measured values of the electromagnetic parameter are associated with the recorded image of the area of the PCB around the probe head; a position of each recorded image of the area on a map representation of the PCB is determined; the map representation of the PCB is overlaid with the measured values of the electromagnetic parameter, and the map representation of the PCB is visualized together with the overlaid measured values of the electromagnetic parameter.

This invention relates to a torque load simulation device and an electromagnetic compatibility (EMC) testing system. The device includes an airflow valve assembly and a pneumatic friction structure. The airflow valve assembly regulates the compressed air pressure output by an air pump unit. The pneumatic friction structure is a grooved snap-fit ​​structure with two pneumatic friction plates respectively disposed on the inner walls of both sides of the groove. The pneumatic friction plates are driven and connected to the air pump unit via gas pipelines. The air pump unit regulates the pushing force applied to the pneumatic friction plates through the airflow valve assembly. The two pneumatic friction plates transmit the pushing force to both sides of the rotating brake disc through their friction surfaces, generating friction on the brake disc to simulate the torque load of ground friction. By designing a passive torque load simulation device, the load applied to the power steering motor can be simulated during EMC testing, which helps to accurately evaluate the electromagnetic characteristics of the power steering motor.

The invention discloses an electromagnetic disturbance simulation test method, system, equipment and medium in an extreme multi-physical environment, and belongs to the technical field of electric power engineering and measurement testing, and the method comprises the steps: electrifying a test device, obtaining extreme multi-physical environment data, generating multiple groups of test conditions, and setting test points; setting the voltage of a high-voltage source, setting an acquisition mode and a trigger value of an oscilloscope, controlling the switching frequency of a pulse transmission line to be adjusted and applied to a to-be-detected electronic transformer, drawing an I-V curve of the electronic transformer according to an acquisition result, and combining the I-V curves of the electronic transformer under multiple groups of temperature and humidity conditions, and analyzing to obtain the failure voltage and the failure current of the electronic transformer. According to the method, the performance data of the electronic mutual inductor under different temperature and humidity conditions and electromagnetic disturbance environments are comprehensively and accurately collected, the data can be deeply analyzed through a scientific and reasonable data processing method and a strict failure judgment criterion, and the performance and reliability of electronic equipment are accurately evaluated.

The invention belongs to the field of ionizing radiation and electromagnetic radiation, and particularly relates to a system electromagnetic pulse effect test method and system and a storage medium. The invention provides a system electromagnetic pulse effect signal test method. The method does not need to measure the electromagnetic pulse effect of the system in an electromagnetic shielding structure. Through filtering, separation, spectrum decomposition and clustering and signal reconstruction of signals, extraction of the electromagnetic pulse effect of the system is realized, and complexity of measurement of the electromagnetic pulse effect of the system is effectively reduced. The electromagnetic pulse effect of the system can be measured in a non-electromagnetic shielding environment, and the complexity of the test system is effectively reduced. And the accuracy of the electromagnetic pulse effect test of the system is improved. And meanwhile, the actual situation that the signals are distributed differently in different time periods is considered, and the influence of large time domain signal change on the signal extraction accuracy can be effectively solved. According to the method, different frequency components are clustered, the signal spectrum is constructed, and the accuracy of electromagnetic pulse extraction of the system is ensured.

The invention discloses an LDACS and TACAN electromagnetic compatibility simulation test method, and belongs to the technical field of aviation navigation, and the method comprises the steps: selecting a test scene through a graphical user interface; signal parameters are configured through a graphical user interface, and a TACAN signal and an LDACS signal are generated; channel parameters are configured through the graphical user interface, and a test channel is generated; configuring demodulation parameters through a graphical user interface, and constructing a receiving end; transmitting the TACAN signal and the LDACS signal through a test channel, and demodulating the TACAN signal and the LDACS signal at a receiving end; evaluating the electromagnetic compatibility of the LDACS to the TACAN, and generating and displaying a test result; according to the LDACS and TACAN electromagnetic compatibility simulation testing method, software simulation of interference testing of an aviation communication system is achieved, and the method has the advantages of being configurable in parameter, extensible in scene, low in cost and the like.

The application discloses a whole vehicle electromagnetic compatibility pedestrian simulation system verification method and device, equipment and a storage medium, relates to the technical field of whole vehicle electromagnetic compatibility pedestrian simulation system, and comprises the following steps: acquiring simulation test scene data, the simulation test scene data is collected by building a whole vehicle electromagnetic compatibility pedestrian test scene in a whole vehicle semi-electric wave darkroom; verifying the electromagnetic compatibility whole vehicle function determination verification result based on the simulation test scene data; based on the verification result, the electromagnetic compatibility whole vehicle function item is determined, the whole vehicle intelligent driving function test tool is expanded, and the whole vehicle intelligent driving function test tool is applied to automatically match the typical road working condition. Through building a simulation test scene in a whole vehicle semi-electric wave darkroom and collecting data, the application verifies the whole vehicle electromagnetic compatibility function expansion function item, realizes automatic matching of the typical road working condition, significantly improves the performance test efficiency and accuracy of the intelligent driving system in the complex electromagnetic environment, and ensures the safety and stability of the vehicle.

The invention belongs to the technical field of primary and secondary fusion pole-mounted switch signal measurement assembly protection, and particularly relates to a primary and secondary fusion pole-mounted switch signal measurement device and method. Comprising an EMC filtering protection module connected with a pole-mounted switch, a secondary signal analog quantity AD sampling module, a frequency measurement module, a power supply module, a state quantity detection module and a signal processing coding module. The EMC filtering protection module is respectively connected with the secondary signal analog quantity AD sampling module, the frequency measurement module, the power supply module and the state quantity detection module, and the secondary signal analog quantity AD sampling module, the frequency measurement module and the state quantity detection module are all connected with the signal processing coding module. According to the technical scheme provided by the invention, the device has the capability of independently carrying out related electromagnetic compatibility (EMC) tests, is relatively high in anti-interference performance, is not easy to damage, and is more suitable for a complex power grid operation environment, so that the reliability of the device is improved, the maintenance cost is reduced, and meanwhile, the signal acquisition precision is also improved.