707 results about "Device under test" patented technology

The invention provides a calibration piece and a calibration method for a multi-port waveguide antenna test system, and a test method and a test system for a multi-port waveguide antenna, in the calibration piece, a positioning structure can ensure the repeatability of each connection, which is the premise of high-precision calibration, and the calibration accuracy is greatly improved. The load unit, the offset short circuit unit and the offset load unit are provided with a plurality of waveguide ports which are the same as those of a tested piece and can be directly butted, the internal structure of the waveguide port of the load unit is an antenna, electromagnetic wave energy can be radiated out instead of being absorbed internally, and high precision and stability of the load standard are guaranteed; according to the method, the reference surface can be determined at the interface of the tested piece, the calibration error model can be directly tested on the reference surface, the accuracy is good, and the solved calibration error model contains all time-varying characteristics of the whole test link during each calibration, so that the method can be used for frequently calibrating according to requirements, and the calibration accuracy is high. Measurement errors caused by temperature drift and link loss can be handled, and the efficiency is high.

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.

An AI decision based multiple telecommunication endpoints system is provided, including a telecommunication endpoint device and an artificial intelligence decision controller. The telecommunication endpoint device performs a communication test with the radio frequency communication device under test. The artificial intelligence decision controller is electrically connected to the telecommunication terminal device to control the communication test, and performs an efficiency analysis on the result of the communication test, and generates a decision instruction according to the result of the efficiency analysis. The artificial intelligence decision controller can centrally control, replace and analyze multiple artificial intelligence modules and generate a large number of telecommunication endpoints device signal sending and receiving behaviors, providing a telecommunication endpoints system with self-adaptive adjustment process, parameters, result analysis and reasonable cost as a test for the development phase, deployment phase, or maintenance phase of the telecommunications equipment product development process.

Embodiments of a device, a method, and a system for channel switching are disclosed. In an embodiment, the device includes a wireless network interface device implemented on one or more integrated circuits (ICs), where the wireless network interface device is configured to negotiate a Target Wake Time (TWT) of a first Device Under Test (DUT) (DUT1) and a TWT of a second DUT (DUT2), and switch channels between DUT1 and DUT2 according to the negotiated TWT of DUT1 and the negotiated TWT of DUT2.

A probe needle for testing a device under test (DUT) includes a needle core; a needle coat; and an isolation layer disposed between the needle coat and the needle core, wherein in an extending direction of the needle core, the isolation layer extends exceeding the needle coat and the needle core extends exceeding the isolation layer. A probe card structure including the probe needle having a needle core; a needle coat; and an isolation layer and a method of testing a device under test using the probe card structure are also provided.

A probe unit includes first and second probes of equal length. A probe body of at least one of the probes has a slot extending along a longitudinal direction thereof to define two slats. A total cross-sectional area of the slats of the first probe is greater than that of the second probe. Alternatively, the probe body of the second probe is solid, and the total cross-sectional area of the slats of the first probe is greater than the cross-sectional area of the solid probe body of the second probe. The slats are shaped in such a way that a contact force of the first probe is greater than that of the second probe, thereby meeting testing requirements of conductive contacts of different sizes on an electronic device under test, while reducing problems of different probe tip wear rates and excessive probe mark area ratio differences.

The invention relates to the technical field of electrical measurement, in particular to a current measurement method and device, computer equipment, a storage medium and a product. The method comprises the following steps: carrying out output current measurement on to-be-measured equipment based on at least one range channel to obtain an initial current value corresponding to each range channel at the current moment; fusing the initial current values to obtain a comprehensive current value at the current moment; and performing current correction on each initial current value according to the comprehensive current value to obtain a target current output by the to-be-tested device. The method can realize long-term high-precision measurement while ensuring real-time performance, reduces manual calibration cost, has a wide application prospect, and is suitable for various scenes such as power distribution networks, factory power monitoring, energy efficiency analysis and protection systems and the like.

A signal driver system can include one or more force amplifiers configured to provide drive signals to an output node, such as a device under test (DUT) node. The system can include a first switch circuit coupled between a first force amplifier and the output node, and the first switch circuit can include multiple parallel instances of switch circuits with respective different resistance characteristics. The system can include a second switch circuit coupled between a second force amplifier and the output node. The system can include a control circuit configured to control the switch circuit instances of the first switch circuit to mitigate glitch at the output node, for example, when switching between the first and second drive signals.

The invention provides a multi-dimensional hierarchical verification test method, equipment and device, and the device comprises a business layer which generates a business-level instruction, transmits the business-level instruction to a channel layer, and receives first response information returned by the channel layer; the channel layer generates a channel-level instruction, sends the channel-level instruction to the driving adaptation layer, and generates first response information based on the service-level instruction and second response information returned by the driving adaptation layer; the driving adaptation layer is used for generating an interface-level instruction, sending the interface-level instruction to the driving layer, and generating second response information based on the channel-level instruction and third response information returned by the driving layer; the driving layer is used for driving the interface-level instruction to the to-be-tested equipment and receiving third response information returned by the to-be-tested equipment; wherein the first response information, the second response information and the third response information are used for determining a test result of the to-be-tested equipment. The verification work of the to-be-tested device with complex interaction is layered and simplified, and the flexibility and expansibility of the device are improved.

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 test system includes a test and measurement instrument, ovens to hold devices under test (DUT), each oven having an oven switch selectably connected to the DUTs, channel switches selectably connected to the oven switches and to one channel of the instrument, one or more processors to: select an oven and its oven switch, connect that oven switch to a subset of DUTs in that oven, connect the channel switches to that oven switch to receive signals from the subset of DUTs, send the signals to channels of the instrument to acquire waveforms from the subset of DUTs in parallel, and repeat connecting of the channel switches and that oven switch until the instrument has acquired waveforms from each DUT in that oven, use machine learning to tune each DUT, test whether each DUT in that oven is optimally tuned, and repeat until all DUTs have been tuned and tested.

The invention provides an error frame injection device, method and system, and the device comprises a control register module, an error frame memory module and a medium access control module which are respectively constructed in a field programmable gate array. The control register module is used for receiving an Ethernet data frame and an error frame injection strategy, generating an Ethernet error frame, and generating an injection control signal of the Ethernet error frame according to an error injection frequency if an injection trigger condition is monitored to be established; the error frame memory module is used for receiving and storing Ethernet error frames; and the medium access control module is used for responding to the injection control signal, reading the Ethernet error frame from the error frame memory module, and injecting the Ethernet error frame into the equipment to be tested for testing. By integrating the control register module, the error frame memory module and the medium access control module in the field programmable gate array, Ethernet error frame injection is realized, and an efficient, comprehensive and economical test means is provided for high-speed Ethernet equipment.

A new system and method for measuring RDSon, RDSoff and current collapse on semiconductor devices is provided. The system and method operate by measuring the current flow through the transistor, instead of measuring the voltage across the device under test. The viewing resistor gives us an accurate picture of the RDSon, RDSoff and current collapse recovery curve because it is on the same current path as the device under test.

An example test system includes a probe card configured to contact a device under test (DUT); a module including a first optical connector configured to contact a second optical connector on the DUT, with the first optical connector being for a fiber optic cable; and a motion system configured to move into, and out of, contact with the module. When the motion system is in contact with the module, the motion system is configured to move the module relative to the DUT in order to align the first optical connector to the second optical connector.

An example apparatus is configured to communicate with a device under test (DUT). The apparatus includes a first interface circuit to communicate with a test instrument using a first protocol and a second interface circuit to communicate with the DUT using a second protocol. The second protocol is a predefined protocol for which the DUT is configured to operate. The first protocol is for connections associated with a first frequency attenuation. The second protocol is for connections associated with a second frequency attenuation. The first frequency attenuation is greater than the second frequency attenuation. Circuitry is configured to perform one or both of the following operations: (i) converting first data received from the test instrument in the first protocol to the second protocol for output to the DUT via the second interface circuit, or (ii) converting second data received from the DUT in the second protocol to the first protocol for output to the test instrument via the first interface circuit.

The application discloses a multicast or broadcast access register verification method and system, and belongs to the chip verification technical field, and comprises the following steps: obtaining a register model corresponding to a device under test; reloading a driver configuration global parameter of a bus agent in a multicast or broadcast test case; obtaining all register nodes in the register model according to the test case, screening all the register nodes according to a register node list to obtain a corresponding register node sequence; obtaining all registers corresponding to each register node in the register node sequence, and screening all the registers of each register node in the register node sequence according to a preset register attribute and a register name of the register list; performing write access on each register to obtain a first register, and performing read access on the first register, thereby improving the verification efficiency.

A temperature controlled test system, a manifold and a method of distributing working fluid using the manifold. A temperature controlled test system includes a working fluid supply machine to supply a working fluid, an output tube connected to the working fluid supply machine to receive the working fluid, a temperature control head connected to the output tube, and a manifold, and a plurality of testing caps. The manifold includes a single thermal air inlet that is connected to the temperature control head, a plurality of nozzles, and a distributing mechanism that is configured to distribute the working fluid to at least two nozzles. The testing caps are respectively connected to the nozzles.

The invention discloses a method and equipment for improving matching of a measured piece in an attenuation measurement system, belongs to the field of radio metering, and comprises the method for improving matching of the measured piece in the attenuation measurement system, and the core of the method is that a precise matching absorption load is added in a front-end transmission system of the measured piece; energy transmission is realized on a waveguide wide side of the precise matching absorption load through a coupling hole; a transmission waveguide is additionally arranged above the coupling hole, and energy is transmitted to a measured piece in the forward direction; and a precise matching absorption load is added in the reverse direction to absorb energy in the reverse direction, so that the measured piece matching improvement equipment in the attenuation measurement system is formed, and finally the measured piece matching of the attenuation measurement system is improved. According to the method and the equipment, the impedance matching of the measured piece is improved by using the precise matching load, the voltage standing-wave ratio of the load level is realized, and the attenuation measurement accuracy is improved. The tested piece matching improvement equipment developed by using the method is directly connected to two ends of the tested piece in an attenuation measurement system, so that the impedance matching of the tested piece is improved.

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.

A test and measurement device has a port to receive a signal from a device under test (DUT), one or more analog-to-digital converters (ADC) to digitize the signal to create one or more waveforms, a display, and one or more processors configured to execute code that causes the one or more processors to: generate a histogram from the waveform, the histogram having one or more dimensions; and calculate one or more entropy values for each of the one or more dimensions. A method includes receiving a signal from a device under test (DUT) at a test and measurement device, digitizing the signal using one or more analog-to-digital converters (ADC) to produce a waveform, generating a histogram from the waveform, the histogram having one or more dimensions, and calculating one or more entropy values for each of the one or more dimensions.

A test and measurement system includes: a test and measurement instrument; a computing device connected to the test and measurement instrument; and one or more processors configured to execute code, the code causing the one or more processors to: collect measurement data from a full parameter scan of the first device under test, the full parameter scan comprising a total number of measurement points for each parameter combination of a number of parameters; identifying a core parameter scan from the full parameter scans, the core parameter scan comprising a total number of measurement points for fewer parameter scans than the full parameter scans; calculating an auxiliary parameter scan using the core parameter scan; determining a reduced parameter scan using the core parameter scan and the auxiliary parameter scan; and testing a subsequent device under test of the same type as the first device under test using the reduced parameter scan.

The invention relates to a partial discharge signal identification method, device and equipment, a medium and a program product. The method comprises the following steps: acquiring original partial discharge pulse data of to-be-detected equipment; inputting the original partial discharge pulse data into a pre-trained partial discharge signal enhancement model to obtain enhanced partial discharge pulse data; matching the enhanced partial discharge pulse data with a standard pulse signal to obtain candidate partial discharge pulse data; acquiring response feature information of the to-be-detected equipment; and inputting the candidate partial discharge pulse data and the response feature information into a partial discharge identification model, respectively executing feature extraction to obtain a to-be-detected partial discharge pulse feature and a response distribution feature, and obtaining a target response identification result of the to-be-detected device based on the to-be-detected partial discharge pulse feature and the response distribution feature. By adopting the method, multi-dimensional features such as a topological structure and an operation state of the equipment can be fused, the identification accuracy is high, and the anti-interference capability is strong.

A measurement system for over-the-air testing of a device for non-terrestrial networks is described. The measurement system includes an anechoic chamber, at least one transmission antenna configured to transmit a source signal, a polarization rotator configured to rotate a polarization state of the source signal transmitted by the transmission antenna, and an electronic circuit configured to control the polarization rotator such that an ionospheric Faraday rotation is simulated. In addition, a user equipment (UE) is described. The UE is configured to measure a polarization direction of a received signal and to report the measured polarization direction by transmitting it as channel state information. Further, a method for emulating and determining a polarization mismatch in non-terrestrial communication systems is described. The method includes a step of establishing a connection between a system simulator and a device under test, wherein the system simulator indicates the used polarization to the device under test.

The application provides an MSI address translation simulation system and method, and relates to the technical field of integrated circuit design and verification. The system comprises an MSI transaction generation module, which is used for generating MSI transactions based on an interrupt target semantic model; a synchronous interface module, which is used for synchronizing configuration information, running states and transaction semantics between the MSI address translation simulation system and a device under test; an MSI transaction identification module, which is used for identifying MSI transactions in a mixed transaction flow; a translation result collection and path fingerprint extraction module, which is used for collecting translation results of the MSI transactions after address translation by the device under test and constructing translation path fingerprints; and a verification module, which is used for performing consistency verification on the translation results and the translation path fingerprints output by the device under test. The system provided in the application embodiment can realize structured simulation and consistency verification of the MSI address translation process.

This application relates to the field of electronic equipment technology, and discloses a device testing method, testing equipment, and storage medium. The method includes: loading and initializing a traffic classification module, a traffic isolation module, and an algorithm module at the kernel network protocol stack of the operating system of the device under test; using the traffic classification module to divert the test data of different test items to different queues based on the information of the test data of each test item in multiple test items; using the algorithm module to perform network impairment processing on the test data flowing through the traffic isolation module, so that the traffic isolation module outputs the impaired data; based on the impaired data, determining whether the network state of the device under test has been configured to a weak network state; if the network state of the device under test has been configured to a weak network state, evaluating the working state of the device under test, and determining the test result of the device under test based on the working state of the device under test. This application can test whether the device under test meets the requirements under a weak network state.

The invention provides a remote vehicle control test method and system, and belongs to the technical field of automobiles, and the method comprises the steps: obtaining a test case and a signal mapping file; generating a control instruction corresponding to a remote vehicle control test process based on the test case and a signal mapping file; the simulation equipment generates a test signal based on the control instruction and sends the test signal to the tested equipment; and feeding back a test result, and comparing the test result with a predicted result of the test case. A flexible and easy-to-use remote vehicle control test platform is constructed through stepwise module separation and configuration uploading by adopting a cloud deployment method, and test cases and signal mapping files can be automatically generated based on a generation tool, so that different vehicle types or hardware can be quickly replaced and adapted, and the test efficiency is improved. The overall reconstruction cost caused by equipment replacement is reduced, the manual writing workload can be omitted, and rapid iteration is supported to adapt to a new process.

A method of testing phase-based ranging includes the following. A respective first phase correction term in response to a channel sounding procedure is measured for a first carrier frequency of a carrier signal by a device under test and a test and / or measurement instrument, respectively. A first channel phase offset is calculated for the first carrier frequency based on the measured first phase correction terms. A respective second phase correction term is measured for a second carrier frequency of the carrier signal by the device under test and the test and / or measurement instrument, respectively. A second channel phase offset is calculated for the second carrier frequency based on the measured second phase correction terms. A phase is altered in order to emulate a different distance between the test and / or measurement instrument and the device under test. Further, a test and / or measurement system is described.

A test and measurement device comprises two or more channels to enable the test and measurement device to connect to a device under test (DUT), each channel comprising an analog-to-digital converter (ADC) and one or more trigger devices, each trigger device determining one or more trigger conditions, a display to enable the test and measurement device to display data from the ADC, a user interface, and one or more processors configured to execute code to cause the one or more processors to acquire data from the two or more channels at a different time than other two or more channels in response to one or more trigger conditions.A test and measuring instrument similar to the one mentioned above, except that in addition to one or more channels with ADCs, it includes at least one channel with an auxiliary input and a threshold detector instead of an ADC.

This application provides an automated testing method, apparatus, device, and storage medium. The method includes: receiving a test instruction; the test instruction characterizing testing of a target device; responding to the test instruction, invoking an edge test node to execute a corresponding test task on the target device; the edge test node includes multiple devices under test and a task corresponding to each device under test; and invoking the edge test node to record a video stream generated during the execution of the corresponding test task by the target device. In this embodiment, during the automated testing of the target device, the video stream generated during the execution of the corresponding test task by the target device is recorded, thereby realizing real-time video streaming during the testing process. Through a distributed architecture design, test resources are deployed in a distributed manner on edge test nodes, which can effectively manage and schedule a large number of devices under test, realizing the large-scale application of automated testing.