13 results about "Immunity Testing" patented technology

This invention discloses a system and method for testing the radio frequency interference (RFI) immunity performance of train vehicle equipment. The system includes a test terminal, a mobile terminal, an adjustable bracket, an antenna, and a field strength probe. The mobile terminal houses a power supply and an immunity signal generator. The power supply powers the test terminal and the immunity signal generator, and the immunity signal generator generates and amplifies the RF modulation signal. The test terminal is located on one side of the top of the mobile terminal. This system and method for testing the RFI immunity performance of train vehicle equipment utilizes a mobile terminal connected to the test terminal, antenna, field strength probe, and immunity signal generator to perform RFI immunity testing. The immunity signal generator simulates the RF interference environment, eliminating the need for an anechoic chamber. Testing can be conducted directly within the train carriages after the train assembly is completed and all functions are properly debugged, improving the overall mobility and portability of the testing system.

The application discloses a kind of sensor chip high reliability high accuracy test system and method for extreme environment, belong to sensor test technical field.The test method includes multiple physical field coupling environment loading, automobile working condition excitation injection, anti-interference synchronous acquisition, anti-drift real-time error compensation, dynamic performance degradation analysis and drift immunity test report generation steps.Anti-drift real-time error compensation is monitored by distributed auxiliary sensor array in real time temperature gradient kurtosis, vibration spectrum entropy and electromagnetic shielding effectiveness, freezes CNN convolution layer weight after triggering drift flag, only carries out incremental federal compensation to fully connected layer, and introduces the physical constraint correction compensation output based on FEM simulation.The application can effectively inhibit the mismatch of compensation coefficient caused by environmental drift, improve the long-term stability and precision of sensor chip test under extreme environment, meet the AEC-Q100 full life cycle reliability verification requirement.

The utility model relates to the technical field of radio frequency radiation immunity testing, and discloses a to-be-tested equipment placing table in a radio frequency radiation immunity test, which comprises a table plate, a supporting piece and a fixing device, and is characterized in that the table plate is provided with a wire accommodating groove which extends along the length direction of the table plate; the supporting piece is arranged on the surface, adjacent to the ground, of the bedplate; and the fixing device is arranged in the wire accommodating groove and is used for fixing a connecting wire of the to-be-tested equipment. According to the placing table for the equipment to be tested in the radio frequency radiation immunity test, the fixing device is arranged in the wire containing groove, the height of the fixing device is not higher than the upper surface of the table plate, the fixing device is used for fixing a connecting wire of the equipment to be tested, and when the number of cables, signal wires and control wires of the equipment to be tested is large, the fixing device is fixed. The cables, the signal lines and the control lines are limited in the wire accommodating grooves through the fixing devices, so that all the cables, the signal lines and the control lines can be in a uniform interference signal field, and the influence on a test result is avoided.

This invention provides a method and system for testing the electromagnetic radiation immunity of components, relating to the field of electromagnetic immunity testing technology. The invention sets a range for the electromagnetic frequency and amplitude of the interference signal, generating multiple particles characterizing the interference signal within this range. Through iterative particle swarm analysis, it rapidly collects highly sensitive sample points that cause functional abnormalities in components during electromagnetic interference testing. By clustering these highly sensitive samples, it locates the electromagnetic interference sensitive range of the target component. Compared to full-band scanning and fixed-point scanning methods for electromagnetic interference testing, this invention enables automated and quantitative extraction of the electromagnetic sensitivity range, reducing subjective bias from manual location and improving analytical consistency and repeatability. Furthermore, by focusing on highly sensitive frequency bands and field strength ranges, it optimizes the test path, reduces redundant scanning points, and significantly improves the efficiency of electromagnetic interference testing.

The present disclosure provides a system for radiation immunity testing, comprising a signal generator (320), a power amplifier (330) and an antenna (340), characterized in that the signal generator (320) and the power amplifier (330) are disposed on a common rack (360) which can be arranged in a laboratory (100) for radiation immunity testing; when testing, the antenna (340) is also disposed on the common chassis (360) and is connected to the power amplifier (330) by means of a coaxial cable (354). Energy loss on a coaxial cable can be reduced, so that use of a high-cost high-power amplifier can be avoided.

The invention relates to the technical field of electromagnetic compatibility testing, in particular to a chip radiation immunity testing method, device and equipment, a medium and a product, and the method comprises the steps: designing a testing tool according to the size information of a circuit board in a current electric drive controller, and designing a first insulating plate and a second insulating plate, an opening is formed in a corresponding position on the insulating plate on the same side as the cover plate according to the position information of the chip to be tested; and assembling the circuit board, the first insulating plate, the second insulating plate and the test tool, placing the assembled to-be-tested product in a preset test mechanism, applying a radio frequency interference signal to the to-be-tested chip, and monitoring the working state parameters of the to-be-tested chip so as to evaluate the radiation immunity performance of the to-be-tested chip. Therefore, the problems that an existing chip radiation immunity testing method is long in testing period, the chip is prone to being damaged, and adaptability is poor are solved, radiation immunity testing is carried out on the premise that the chip is not disassembled and a circuit board is not redesigned, and therefore the checking period is remarkably shortened.

The invention discloses an EMC immunity testing method and device for an industrial vehicle, equipment and a medium, and belongs to the technical field of industrial vehicles. The method comprises the following steps: in an electromagnetic interference environment, acquiring acquisition information of a marker arranged on a driving wheel of the industrial vehicle in advance through a sensor; vehicle speed information of the industrial vehicle is determined according to the collected information and wheel diameter information obtained in advance; and determining an EMC immunity test result of the industrial vehicle according to the vehicle speed information. According to the technical scheme, the vehicle speed stability can be objectively verified in real time, the collected information and the vehicle speed data in the testing process can be reserved and backtracked, the subjectivity of manual judgment is avoided, standard and rigorous support is provided for the qualification judgment of the EMC immunity of the industrial vehicle, and meanwhile the method has extremely high applicability.

To solve the problem that there is no established method for testing the immunity of an unmanned aerial vehicle, and because the unmanned aerial vehicle originally flies and moves, it is difficult to perform an immunity test in an actual operation state.SOLUTION: The immunity testing device and the immunity testing method of the present disclosure enable a test in a state close to an actual operation of an unmanned aerial vehicle by using a test environment used for general electronic equipment or the like. A simulation signal is used for performing an immunity test as a simulated flight state equivalent to an actual operation state while the unmanned aerial vehicle stays at a fixed position in a certain space. A GTEM cell can be used as a shield structure for housing the unmanned aerial vehicle. The present disclosure also provides an evaluation configuration for analyzing a part vulnerable to an interference electromagnetic wave and specifying a part that may cause a malfunction in an unmanned aerial vehicle.SELECTED DRAWING: Figure 3

This invention provides an analog quantity immunity testing system, relating to the field of industrial automation testing technology. The system includes: a first test group electrically connected to the analog product under test; a second test group electrically connected to the first test group, including a conditioning unit and multiple control units; a safety testing instrument electrically connected to the second test group for providing high-voltage test signals; and a programmable power supply for providing low-voltage test signals and power supply. The conditioning unit provides signal conditioning conditions, and the multiple control units switch internal connection methods to construct an electrical test path matching the current test item, automatically performing insulation resistance testing, common-mode rejection testing, differential-mode rejection testing, and channel crosstalk testing. This system not only shortens the testing time for a single product and increases test throughput, but also ensures the consistency and accuracy of test results by eliminating human intervention, protecting the safety of test operators and meeting the needs for efficient, comprehensive, and safe testing of analog products.

This utility model discloses an electromagnetic compatibility (EMC) testing device for automotive starting function, relating to the field of automotive whole-vehicle EMC testing technology. It includes a contact head, a cylinder, an angle adjustment unit, a spatial position adjustment unit, a reversing valve, and an air supply unit. The contact head is used to contact the automotive start button. The cylinder includes a cylinder body and a piston rod. The end of the piston rod is connected to the contact head. The spatial position adjustment unit and the angle adjustment unit are used to adjust the spatial position and direction of the contact head, respectively, so that it can be aligned with the automotive start button. The reversing valve connects to the two inner chambers of the cylinder through two branches to control the cylinder's movement. The air supply unit connects to the reversing valve to supply air to it. This utility model designs three button control methods. Compared with the prior art, this automotive starting function EMC testing device has strong versatility and anti-interference capabilities, and can be flexibly applied to radiation immunity testing of automotive starting function according to vehicle testing requirements.

The application provides an electrochemical immunoassay probe and a preparation method and application thereof, and an electrochemical direct immuno electrode, and belongs to the technical field of electrochemical detection.The electrochemical immunoassay probe provided by the application can be covalently connected to carbon nanomaterial and used as an immune probe of an electrochemical direct immuno test method.The electrochemical signal generated by the probe has a high signal-to-noise ratio, and can effectively improve the sensitivity of the electrochemical direct immuno test method, which is comparable to the commonly used electrochemical indirect immuno test method.The electrochemical immuno probe is firmly fixed on the surface of the electrode to construct an electrochemical direct immuno electrode, and the reagent-free operation of the electrochemical direct immuno test method can be realized, so that the operation difficulty can be greatly reduced and the required operation steps can be simplified.

The invention provides a method and a system for testing the electromagnetic radiation immunity of a part, and relates to the technical field of electromagnetic immunity tests.According to the method and the system, the value ranges of electromagnetic frequency and electromagnetic amplitude are set for interference signals, a plurality of particles representing the interference signals are generated in the ranges, and the electromagnetic radiation immunity of the part is tested through iteration of particle swarms. According to the method, high-sensitivity sample points causing part functional abnormity in an electromagnetic interference test are rapidly collected, and the electromagnetic interference sensitive range of a target part is positioned by performing clustering analysis on high-sensitivity samples. Compared with an electromagnetic interference test method of full-band scanning and fixed-point scanning, the method can achieve the automatic and quantitative extraction of the electromagnetic sensitive range, reduces the subjective deviation of manual positioning, and improves the analysis consistency and repeatability. And by focusing a high-sensitivity frequency band and a field intensity interval, a test path is optimized, redundant scanning point locations are reduced, and the electromagnetic interference test efficiency is greatly improved.

This utility model discloses an auxiliary testing system with multi-unit collaborative operation, belonging to the field of electromagnetic immunity testing technology. The auxiliary testing system mainly includes a control module, an information acquisition module, a parameter retrieval module, and a protection execution module. Specifically, the control module's data communication terminal includes an information acquisition module, which collects parameter information from interference signals emitted by an external EMS generator; the control module's data communication terminal also includes a parameter retrieval module, which retrieves corresponding processing parameters from an external cloud storage database based on the parameter information obtained by the information acquisition module; and the control module's data communication terminal includes a protection execution module. Compared with existing technologies, this utility model improves the accuracy of test results for the tested device, extends the service life of the auxiliary device, and shortens the testing time to a certain extent, thus possessing high practicality.