1018 results about "Equipment under test" patented technology

The invention provides a consistency test method and device for single-to-wire communication, and the method comprises the steps: receiving a communication signal transmitted by a tested device, extracting a time domain feature, a frequency domain feature and a modulation feature of the communication signal, generating a protocol feature value, carrying out the dimension reduction processing, and generating a protocol feature vector; performing matching degree analysis on the protocol feature vector and a predefined mapping dictionary, and determining a target communication protocol type with the highest matching degree; based on the determined communication protocol, dynamically generating a consistency test flow through a pre-trained neural network model; configuring a signal generator to inject an excitation signal according to the test flow, and synchronously acquiring various parameters of the tested equipment; based on the real-time feedback data, dynamically adjusting the signal amplitude, frequency and judgment threshold through a pre-trained neural network model; and summarizing feedback data of multiple rounds of tests, and generating a test report of the consistency index. According to the method, the protocol of the tested equipment can be automatically identified, the test flow is generated for the protocol, and the test efficiency is effectively improved.

The invention provides a close-range radio frequency electromagnetic field immunity test method and system, and relates to the technical field of communication detection, and the method comprises the steps: collecting near-field electromagnetic field distribution data and near-field frequency spectrum power distribution data formed by a radio frequency interference source on the surface of a tested device; constructing a near-field electromagnetic field distribution model; according to the frequency spectrum overlapping degree between the near-field frequency spectrum power distribution data and the working frequency band of the tested equipment, calculating the interference intensity of a radio frequency interference source on the tested equipment, and calculating the power of a target interference source according to the interference intensity through a dynamic frequency spectrum adaptation algorithm; regulating and controlling a radio frequency interference source to generate a radio frequency interference source signal with target interference source power; and monitoring an electromagnetic coupling coefficient of the tested equipment for the radio frequency interference source signal based on the electromagnetic field intensity distribution model so as to generate an immunity test result. Therefore, an actual interference scene of modern wireless equipment in a near-field environment can be simulated more accurately, and comprehensive evaluation of the equipment immunity under high-frequency and near-field conditions is realized.

Embodiments of the present disclosure provide a fuzz testing method, an electronic device, and a computer readable storage medium. The fuzz testing method comprises: acquiring a data packet; generating a protocol rule tree model on the basis of the data packet; generating a test case on the basis of the protocol rule tree model; sending the test case to a device under test; and determining a test result on the basis of response information of the device under test.

The invention discloses a ship mobile energy storage system CAN communication protocol automatic test system and method, and the system comprises a protocol modeling and test configuration module, a simulation node behavior simulation module, a CAN bus interaction and power closed loop module, and a test analysis and result evaluation module. A CAN communication protocol specification of the ship mobile energy storage system and parameters of tested equipment can be obtained, a protocol analysis model and a test configuration file are constructed for format verification and logic consistency verification, meanwhile, a corresponding test case sequence is automatically generated, and the message sending time is controlled to generate a time sequence simulation message flow; and sending the time sequence simulation message flow to the tested equipment, simulating energy interaction behavior acquisition to generate a power feedback data set, testing to obtain a signal consistency deviation and a power execution error to construct a protocol conformity evaluation matrix, and generating a visual test report. According to the invention, the high coverage rate and automatic closed-loop test of the CAN communication protocol can be realized.

The invention provides an automatic testing method and system for full-performance electromagnetic compatibility immunity, relates to the technical field of electronic equipment testing, and aims to accurately simulate electromagnetic interference signals and propagation characteristics thereof through real-time monitoring and data preprocessing in combination with a dynamic modulation function and a recursive coupling model, so that the testing precision and reliability are improved. By introducing a global feedback mechanism and disturbance integration, the immunity evaluation is dynamically optimized, the stable response of the tested equipment under various interferences is ensured, and the comprehensiveness of the evaluation is enhanced. Besides, a self-adaptive dynamic response model is further designed, the test system can dynamically adapt to response changes of equipment through self-adaptive adjustment of test parameters, the test efficiency is improved, errors are reduced, and the advantages of high efficiency and accuracy are shown in an electromagnetic compatibility test.

Disclosed is a robotic system and method designed for the verification and validation of smart connected Human-Machine Interface (HMI) devices. The robotic system integrates a multi-finger modular robotic module, a haptic module, a finger actuator, vision cameras, vision lights, a finger rotary module, a Cartesian robotic arm, an onboard user interface, and an L-shaped door. The method involves replicating human finger interactions, simulating touch sensations on a device under test (DUT), ensuring continuous and reliable operation, utilizing vision cameras for navigation and verification, optimizing vision with controlled lighting, positioning cameras strategically, executing various tasks with a robotic arm, and facilitating user interaction through an onboard interface.

A probe card mounted in an of electronic device testing apparatus is described, having a probe head housing a plurality of contact probes, each having a first end portion which abuts onto contact pads of a device under test, a main board and a connected intermediate board which provides a distance spatial transformation between contact pads made on opposite faces thereof. The intermediate board is a space transformer which includes a plurality of modules that are plate-shaped and coplanar, and structurally and functionally independent from each other. Each module has a first face facing towards the probe head and a first plurality of contact pads whereonto respective second end portions of the contact probes abut and an opposite second face facing towards the main board. The second face has a second plurality of contact pads connected to the first plurality of contact pads.

A measurement system includes a signal analysis circuit, a signal generator circuit, a control circuit, and a DUT connector. The DUT connector is connectable to a device under test for receiving a measurement signal outputted by the DUT. The signal analysis circuit is connected to the DUT connector for receiving the measurement signal. The signal generator circuit is configured to generate a radio frequency (RF) test signal that is transmitted to the DUT. The signal analysis circuit is configured to digitize the measurement signal, thereby obtaining a digitized measurement signal. The control circuit is configured to control the signal generator circuit to generate the RF test signal based on the digitized measurement signal, based on known error parameters of an error model of the measurement system, and based on a desired reflection coefficient at a reference plane associated with the DUT.

The invention discloses an automatic testing system and method for power failure of an optical modem, and relates to the technical field of automatic testing, and the testing system comprises a testing device, a power failure device, a controllable temperature and humidity box, tested equipment and a server. The system configures a plurality of test cases through the test device, and controls the power-down device, the temperature and humidity box and the server according to the test cases, so as to realize the automatic test of the tested optical modem equipment. The test device is responsible for sending a control instruction, the power-down device controls the on-off of the optical modem power supply, the controllable temperature and humidity box adjusts the test environment, and the server interacts with the tested equipment to complete the tests of PON port online, service interaction, PON flow beating and the like. According to the invention, the power failure test of a user in the process of using the optical modem under different temperature and humidity conditions can be simulated, the automation degree is high, and meanwhile, through the integrated design, the test process is simplified, and the test efficiency and quality are improved.

The invention discloses an electrical equipment partial discharge ultrahigh frequency signal intelligent detection device, and relates to the technical field of electrical equipment insulation state monitoring, the electrical equipment partial discharge ultrahigh frequency signal intelligent detection device comprises a flat plate, one side of the flat plate is provided with a sealing suction cup, the sealing suction cup is internally provided with a damping base, the damping base is internally provided with a three-axis displacement mechanism, and the three-axis displacement mechanism is provided with a three-axis displacement sensor. A sensor array is arranged on one side of the three-axis displacement mechanism, a control layer is arranged on one side of the sensor array, horizontal detection sensors are arranged on the two sides of the damping base correspondingly, air suction holes are formed in the two sides of the horizontal detection sensors correspondingly, and telescopic supporting legs are arranged on one sides of the air suction holes. The number of the telescopic supporting legs is three, the three telescopic supporting legs are evenly distributed with the damping base as the circle center at the included angle of 120 degrees, the sealing suction cups are matched with the four sets of circumferentially-distributed air suction holes and air suction pumps, vacuum can be rapidly pumped to form negative pressure adsorption, the flat plate is tightly attached to the surface of tested equipment, and the fixing stability of the device is remarkably improved.

A probe card for a circuit probe test system and methods of fabrication thereof. The probe card includes a substrate portion, and a probe head including a guide plate located below the substrate portion and having a plurality of openings through the guide plate, and a conductive trace on the guide plate that extends between a pair of the openings. A plurality of probe pins extend through the openings through the guide plate, where a pair of probe pins are electrically connected by the conductive trace to form a loopback signal path. Accordingly, the loopback signals may be routed through the conductive trace located on and / or within the guide plate rather than through the substrate portion of the probe card. This may significantly reduce the total length of the loopback signal path, which may thereby improve the signal integrity (SI) during loopback testing of a device-under-test.

A calibration unit comprises a first port which is arranged for being connected to a measurement device; a calibration module comprising at least three different calibration standards for calibrating the measurement device; and a switching module configured to connect the first port with one of the at least three different calibration standards of the calibration module. A daisy chain port is arranged for being connected to a further calibration unit, to an external power meter, or to a device-under-test, DUT. The first port is connectable to the daisy chain port. An internal power meter is arranged within a housing of the calibration unit. The first port is connectable to the internal power meter; or an internal impedance tuner. The first port is connectable to the internal impedance tuner.

A system comprises a signal generator circuit configured to generate a modulated radio frequency (RF) signal based on a predefined waveform. An output signal path is connected to the signal generator circuit and is connectable to a device under test. A first signal path is connected to the signal generator circuit so as to receive a reference signal corresponding to the modulated RF signal. A second signal path is connectable to the device under test so as to receive a measurement signal from the device under test. A analysis signal path is connected to the first and second signal paths for merging the reference signal and the measurement signal into an analysis signal. A signal analysis circuit is configured to separate the reference signal from the measurement signal for analyzing the analysis signal based on the predefined waveform.

A test system has ovens configured to hold devices under test (DUTs), DUT switches, each connected to the DUTs in an oven, splitters, each splitter connected to a DUT switch, an instrument switch connected to one output of each splitter, the other output of each splitter connected to a test instrument, and one or more processors to control the instrument switch to select one of the DUT switches connected to an oven, control the selected DUT switch to connect each DUT in the oven to a channel of the test and measurement instrument, use machine learning to tune the DUT to a set of parameters until the DUT passes or fails, repeat the connecting, tuning, and testing of each DUT until all DUTs in an oven have been tested, and repeat the selection and control of the DUT switches until each DUT in each oven has been tuned and tested.

The invention relates to the technical field of electromagnetic compatibility testing, and provides a current-based magnetic field radiation emission limit value cutting method and device and electronic equipment. Comprising the steps of obtaining working current parameters of tested equipment; determining a basic limit value of magnetic field radiation emission, obtaining a working current of the tested equipment when the magnetic field radiation is the basic limit value, and taking the working current as a reference current threshold value; when the working current parameter is greater than the reference current threshold value, calculating the clipping amount of the magnetic field radiation emission limit value based on the ratio of the working current parameter to the reference current threshold value; and cutting the basic limit value according to the cutting amount to obtain the magnetic field radiation emission limit value of the tested equipment. The limit value is compatible with the existing electromagnetic compatibility national military standard magnetic field radiation emission limit value, so that the electromagnetic compatibility test assessment of the large-current equipment can be evaluated more reasonably and accurately, and the method has high engineering application value.

The present disclosure relates to a circuit board that includes a first edge connector configured to communicatively couple the circuit board to a first connector of a second circuit board. The first edge connector extends from a side of the circuit board a first length. The circuit board also includes a second edge connector configured to communicatively couple the circuit board to a second connector of the second circuit board. The second edge connector extends from the side of the circuit board a second length that is different than the first length.

The invention provides a multi-core consistency test method and device, electronic equipment and a storage medium, and relates to the technical field of communication. Comprising the following steps: determining a plurality of test parameters and a value range of each test parameter according to a test requirement of tested equipment; generating a plurality of groups of test parameter combinations according to the value range of each test parameter; according to the multiple groups of test parameter combinations, creating a test program corresponding to each processing core in a plurality of processing cores participating in the test in the tested equipment, and deploying the test program corresponding to each processing core to each processing core; running the test program on each processing core, and controlling the corresponding processing core to perform consistency test verification by the test program according to each group of test parameter combination to obtain a test result corresponding to each group of test parameter combination; and according to the test result corresponding to each group of test parameter combination, analyzing to obtain a consistency test result between the processing cores. According to the method, the test parameter combination capable of comprehensively covering more test scenes can be generated, and the test comprehensiveness and accuracy are improved.

A measurement system includes a common port, the common port being connectable to a signal output of the device under test. The measurement system further includes a signal line being connected to the common port, wherein the signal line includes a first directional coupler portion and a second directional coupler portion. The measurement system further includes a signal processing circuit, wherein the signal processing circuit includes an IQ analysis circuit and an IQ synthesizer circuit. The IQ analysis circuit is connected with the common port via the first directional coupler portion so as to receive a forward-travelling signal from the common port. Further, a testing method of testing a device under test is described.

A method for determining timing accuracy of one or more radio data packets includes: generating stimulus data, wherein the stimulus data includes the radio data packets and a reference time for transmission of the radio data packets over the air; storing the stimulus data on a test device; and replaying the stimulus data, by the test device, in order to determine the timing accuracy of the transmission of the one or more radio data packets by a device under test.

The invention relates to the technical field of electromagnetic interference, in particular to an electromagnetic interference analysis method and system for digital office equipment. The method comprises the following steps: acquiring equipment operation information; analyzing the equipment operation information, and determining an operation mode; determining an operation result according to the operation mode; acquiring operation electromagnetic data; analyzing the operation electromagnetic data, and determining a frequency spectrum change; and determining change time according to the frequency spectrum change, analyzing the operation result according to the change time, and determining whether electromagnetic interference exists or not. The real-time operation state of the tested equipment is collected, and by comparing expected results and actual results in different operation modes, abnormity can be found more easily, and a basis is provided for judging whether interference exists or not. The electromagnetic monitoring device monitors the electromagnetic signals transmitted and received by the tested device in real time, finally judges whether the device is subjected to electromagnetic interference or not, and provides a decision basis for taking measures for reducing or eliminating interference.

The invention discloses a multi-channel audio switching test circuit for a rail transit vehicle-mounted radio station and an implementation method, and is applied to the field of production test and fault maintenance of rail transit vehicle-mounted radio station equipment. Comprising a power supply circuit, an analog switch switching circuit, an audio channel switching circuit, an indicating lamp circuit, a tested equipment interface and an audio comprehensive tester interface. The audio channel switching circuit is respectively connected with the analog switch switching circuit, the tested equipment interface and the audio comprehensive tester interface; the power supply circuit is respectively connected with the indicator lamp circuit, the analog switch switching circuit and the audio channel switching circuit; the audio channel switching circuit comprises an audio switching circuit I, an audio switching circuit II, an audio switching circuit III, an audio switching circuit IV and an audio switching circuit V; according to the invention, the indexes of all audio channels of the tested equipment can be tested only through one-time equipment connection, and a tester does not need to carry out frequent line plugging and unplugging on each channel, so that the testing efficiency is greatly improved.

The invention relates to the technical field of circuits, and discloses an electro-optical signal conversion method and equipment. The equipment comprises an input module which is connected with at least two paths of signal output interfaces of tested equipment and is used for transmitting at least two paths of signals of the tested equipment to a signal processing module; the signal processing module is used for combining and encoding the at least two paths of signals to generate an electric signal, and transmitting the electric signal to the electro-optical conversion module; the electro-optical conversion module is used for converting the electric signal into an optical signal; and the main control chip is used for controlling the working mode of at least one of the input module, the signal processing module, the main control chip and the electro-optical conversion module according to the current signal transmission state. The electric signal is converted into the optical signal, so that the influence of electromagnetic coupling is avoided.

The embodiment of the invention provides a performance bottleneck determination method and device. When the method is executed, firstly, real-time resource consumption data and real-time performance index data of tested equipment are obtained; determining whether the performance of the tested equipment is abnormal or not according to the real-time performance index data; if the performance is abnormal, determining candidate bottleneck resources according to the real-time resource consumption data; determining resource performance influence factors of the candidate bottleneck resources; wherein the resource performance impact factor of the candidate bottleneck resource indicates the contribution degree to the performance abnormality; and determining a performance bottleneck according to the resource performance impact factor of the candidate bottleneck resource, the performance bottleneck being a resource of which the resource performance factor accords with a preset condition in the candidate bottleneck resource. Therefore, the performance index data, the resource consumption data and other data which comprehensively reflect the real state of the tested equipment are utilized, the problem that the identification and positioning precision is insufficient due to the fact that a single index is utilized for identifying and positioning the performance bottleneck is solved, and the precision of identifying and positioning the performance bottleneck is improved.

A test and measurement device has an input port to receive a signal from a device under test (DUT), the signal having a symbol rate, one or more analog-to-digital converters (ADC) to convert the signal to waveform samples at a sampling rate, and one or more processors, when aliasing is present: up-sample a portion of the signal having aliased samples to produce up-sampled samples; use the up-sampled samples to produce a real-time waveform; perform clock recovery on the real-time waveform to produce a recovered clock; and resample the aliased samples to produce a non-aliased waveform.

A measurement system for determining a noise figure of a device under test is described. The measurement system determines a first total error power based on the output signal by a first noise canceling technique, wherein the first total error power includes systematic errors originating in the device under test and in the measurement system. The measurement system determines a second total error power based on the output signal by a different, second noise canceling technique. The second total error power includes systematic errors originating in the measurement system. The second total error power further includes noise originating in the device under test and in the measurement system outside of the measurement instrument. The measurement system is configured to subtract the first total error power from the second total error power, thereby obtaining an external noise power.

The invention discloses a bus measurement for calculating and displaying timing characteristics of a bus protocol in a test and measurement instrument. Systems and methods enable measurement in a test and measurement instrument of an operating signal timing parameter of an electrical signal transmitted by a device under test over an electrical bus. The bus timing characteristic analyzer identifies nominal signal timing parameters for the acquired electrical signals. The nominal signal timing parameter is defined by a bus protocol and defines a timing criterion for the electrical signal. The analyzer measures an operating signal timing parameter for each of the acquired electrical signals, and for each of the electrical signals, compares the operating signal timing parameter to a nominal signal timing parameter to determine whether the operating signal timing parameter satisfies a timing criterion. The analyzer then displays a visual indication of each of the electrical signals on the test and measurement instrument, which indicates whether the operating signal timing parameter of the electrical signals satisfies the timing criteria.

Disclosed are a system and a method for a high-speed performance measurement. The system includes: a fixing part; a positioner for controlling the rotation of the equipment by controlling the fixing part; a measurement probe; a curved reflective plate for reflecting, in the direction of the measurement probe, an electromagnetic wave radiated by the equipment and transforming the spherical wave of the measurement probe into a plane wave at the position where the equipment is provided; an arc structure including an arc arranged to be adjacent to the fixing part; a probe set including near-filed probes arranged to be spaced predetermined intervals apart from each other on the inner side of the arc; and a control unit, which receives, through a signal analyzer, signal data corresponding to an input signal from some of near-filed probes and the measurement probe.

The invention relates to the field of wireless product testing, and provides a multi-device cooperative closed-loop testing method based on state machine driving, and the method comprises the steps: monitoring the data output of a universal asynchronous receiver / transmitter (UART) interface of a tested device in real time; analyzing the data output by the UART interface of the tested equipment to identify the current running state of the tested equipment; dynamically generating at least one control instruction according to a preset state transition rule set and the identified current operation state; distributing the at least one control instruction to corresponding external test equipment to drive the external test equipment to execute corresponding test operation on the tested equipment; and repeatedly executing the steps of monitoring, analyzing, generating the control instruction and distributing, and automatically and continuously propelling the test process based on the response state of the tested equipment until all test items are completed. According to the technical scheme, multi-device closed-loop testing is driven through the state machine, and the testing automation degree and the process continuity are remarkably improved.

According to the verification method based on Ethernet end-to-end communication, the storage medium and the electronic equipment disclosed by the invention, the initial configuration operation is firstly executed, the communication connection between the test end and the tested equipment is established, then the verification request message is sent to the tested equipment, and the test report is generated based on the response message returned by the tested equipment. The end-to-end communication verification method and system can achieve systematic verification of end-to-end communication, can simulate an actual operation scene, automatically detect and record communication abnormity, counter logic errors, boundary values and CRC verification errors and generate a test report in a high-load, high-concurrency and multi-service-flow parallel complex network environment, improves the automation degree and efficiency of the test, and improves the test efficiency. Dependence on artificial experience is reduced, and stability and reliability of an end-to-end communication mechanism under extreme working conditions can be quantified.

The invention discloses a hardware-in-the-loop automatic test method and system, and the method comprises the steps: receiving a technical specification document and a historical failure case library of a tested device, analyzing a technical specification through a natural language processing model to extract key test parameters, carrying out the correlation analysis of the key test parameters and a fault mode in the historical failure case library, and obtaining a fault mode of the tested device; generating a structured test demand table, wherein the structured test demand table comprises test target priorities, constraint conditions and boundary value definitions; based on the structured test demand table and equipment working condition data acquired in real time, generating a plurality of test cases covering boundary conditions and extreme working conditions by using a genetic algorithm; the test cases covering the boundary conditions and the extreme working conditions are screened out from the multiple test cases to obtain a test case sequence, and each case in the test case sequence comprises a fault injection parameter, an expected response threshold value and an execution priority label. According to the method and system, the test coverage rate and efficiency are improved, and manual intervention is reduced.