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142 results about "Test timing" patented technology

Method of probe and lead foot automatic aiming and probe station testing system thereof

ActiveCN103091521ASolve the problem of not being able to automatically align the pins of the device under testImprove bindingElectrical measurement instrument detailsElectrical testingElectricityManufacturing technology
The invention discloses a method of probe and lead foot automatic aiming. Automatic aiming of the testing probe and the lead foot are achieved through six steps. The invention further discloses a probe station testing system of the probe and lead foot automatic aiming. The probe station testing system of the probe and lead foot automatic aiming comprises a movable probe displacement device, a probe frame, a probe, a fixture, a sample displacement device, a controlling device, a machinery supporting device, a signal transmission device and a power supply device. The probe frame and the probe are installed on the probe displacement device. The fixture is movable and is used for fixing a to-be tested device and a wafer. The controlling device is capable of setting up procedures of all the devices. The method of the probe and the lead foot automatic aiming and the probe station testing system of the probe and lead foot automatic aiming are low in cost and good in generality. The method of the probe and the lead foot automatic aiming and the probe station testing system of the probe and lead foot automatic aiming can test efficiently under the condition without damaging the to-be tested device and the wafer in short time. The method of the probe and the lead foot automatic aiming and the probe station testing system of the probe and lead foot automatic aiming can be applied widely in the survey of precise electricity of complex and high speed devices. Reliability of testing signal quality and testing results can be guaranteed. Testing time is shortened and cost of device manufacturing technology is reduced.
Owner:SHANGHAI JIAO TONG UNIV

Rapid bridge testing and estimation method based on change of time-varying dynamic characteristics of axle coupling system

ActiveCN109357822AAchieving Deformation PredictionEffective assessmentElasticity measurementMobile vehicleEstimation methods
The invention discloses a rapid bridge testing and estimation method based on change of time-varying dynamic characteristics of an axle coupling system. The rapid bridge testing and estimation methodcomprises the steps that vibration response of a structure under a moving vehicle is collected through a sensor arranged on a bridge, time-varying dynamic characteristic parameters of the axle coupling system are identified through a variational modal decomposition method and then substituted into a mapping relation among a vibration mode scaling factor, vehicle parameters and the time-varying dynamic characteristics, thus the vibration mode scaling factor and displacement flexibility matrix deep parameters of the structure can be calculated, accordingly, deformation of the structure at any static load is predicted, and structure damage identification based on a displacement flexibility matrix is conducted. The rapid bridge testing and estimation method has the advantage that the deep parameters of the structure are identified from only-output vibration response, and then structure performance is estimated, has the characteristics of low required test cost, short testing time and highidentification precision, and has wide prospects of being widely applied to safety estimation of multiple bridges on a national highway network.
Owner:SOUTHEAST UNIV

Jitter tolerance testing method and circuit for high-speed serial IO interface based on BIST

The invention discloses a jitter tolerance testing method and circuit for a high-speed serial IO interface based on BIST (built-in self-test). The circuit mainly consists of a CDR circuit module, a jitter injection module, and an error code detection module. A CDR circuit at the receiving end of the high-speed serial IO interface is additionally provided with the jitter injection module and the error code detection module, and can achieve the self-testing of the jitter tolerance of the receiving end. The jitter injection module comprises a Jitter Memory, a PI (phase interpolator) and a PRBS (pseudorandom binary sequence) circuit, and is used for generating a test sequence containing jitter information. The error code detection module comprises a sequence detector (PRBS Checker), an XOR gate and an error code counter (Error Detection), and is used for detecting an error code and obtaining the number of error codes. The method and circuit achieve the self-testing of the jitter tolerance of the receiving end, and can achieve the different types of jitter injection, such as RJ (random jitter), PJ (periodic jitter), and DCD (duty cycle distortion). The BIST circuit is simple in implementation, effectively shortens the testing time, reduces the testing cost, can be used for various types of high-speed serial IO interface circuits, and is higher in practicality.
Owner:PEKING UNIV

Integrated portable multichannel phase coherent signal analyzer

The invention discloses an integrated portable multichannel phase coherent signal analyzer, comprising the following components: a clock generation module, a radio frequency signal source module, a coherent signal generation module, a local oscillator signal source module, a coherent receiver module, a master computer calling frequency and tracking algorithm module and an error correction and algorithm revising module, wherein, the clock generation module provides reference time base signals for the radio frequency signal source module and the local oscillator signal source module; the radio frequency signal source generation module generates a radio frequency excitation signal for the coherent signal generation module; the coherent signal generation module outputs four paths of coherent radio frequency excitation signals through an output interface; the local oscillator signal source module generates a coherent local oscillator signal to the coherent receiver module; the coherent receiver module acquires the four paths of detected signals from an input interface and forwards the detected signals to a main control computer after being processed; and the main control computer calling frequency and tracking algorithm module and the error correction and algorithm revising module finish the final process on the detected signals. The analyzer of the invention has small volume, low cost, simple testing process, and vector error correction and revising function, ensures the measuring accuracy of the multichannel phase and the amplitude difference, lowers the testing cost, shortens the testing time and improves the testing flexibility and the testing accuracy.
Owner:THE 41ST INST OF CHINA ELECTRONICS TECH GRP

Automatic test system and method for 1dB compressing point of high-power radio frequency power-amplifying module

The invention relates to a system for automatic test of 1 dB compression points in a high-power radio frequency power amplifier module and a method thereof. The system comprises a signal source, a frequency spectrograph, a personal computer, a switch, an isolator, an attenuator, and a testing control panel; wherein the signal source, the frequency spectrograph and the personal computer constitute a local-area network via the switch, the signal source provides input power signals to a power amplifier module to be tested, the frequency spectrograph obtains the output power of the power amplifier module to be tested and reports to the personal computer to compute gains, and hereby the personal computer computes the next output power of the signal source and searches 1 dB compression points in the power amplifier module to be tested by using the principle of dichotomy after the power amplifier module to be tested enters a nonlinear operating area. The inventive system can realize automatic test of 1 dB compression points in the high-power radio frequency power amplifier module with no damage on power amplifiers and remarkably improved test speed and progress; and the testing error is controlled to be 0.1 dB, and the testing time of each power amplifier module is shortened to be 30 seconds.
Owner:WUHAN HONGXIN TELECOMM TECH CO LTD

Time reference redundancy signal intelligent testing system and method of time synchronization device

The invention discloses a time reference redundancy signal intelligent testing system and method of a time synchronization device. The time reference redundancy signal intelligent testing system comprises a GPS / Beidou satellite antenna receiver, a manger for operating a testing and analyzing management program, a time frequency standard source connected with the manager through a communication link for realizing program control, and a time scale impulse testing device, and an IRIG-B (Inter-Range Instrumentation Group) code testing device. The time reference redundancy signal intelligent testing system is characterized by being provided with an intelligent time frequency signal switcher, the program control of the manager is realized through a testing and analyzing management program operating in the manager, program control switching is carried out by the intelligent time frequency signal switcher, and the intelligent time frequency signal switcher is used for testing the time reference redundancy signal switching function. Under the condition of no need of manual intervention, the function and the performance of outside reference signal switching of the time synchronization device are simply and effectively intelligently tested, the complex service function and the performance testing intelligent level of the time synchronization device are reliably improved, the performance is more accurately tested, the testing efficiency is higher, and the testing time is greatly shortened.
Owner:ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD +1

Photoelectric module and control method thereof, imaging device, and electronic device

Disclosed are an optoelectronic module and a control method thereof, an imaging device and an electronic device. The photoelectric module includes an image sensor including an array of photosensitivepixel units and a filter for allowing light rays in a predetermined frequency band to pass therethrough. The photosensitive pixel unit array includes at least one photosensitive pixel unit, and the photosensitive pixel unit includes at least two photosensitive pixels. The photosensitive pixels belonging to the same photosensitive pixel unit share the same analog-to-digital converter and the same photosensitive test timing circuit. When scene information is formed, the photosensitive pixel outputs an electrical signal. When the depth information is formed, the photosensitive pixels belonging tothe same photosensitive pixel unit simultaneously output an electrical signal through an analog-to-digital converter and a photosensitive test timing circuit. The photoelectric module of the embodiment of the present application and the control method thereof, the imaging device and the electronic device acquire the scene information and the depth information through one image sensor, thereby avoiding the high cost of using two image sensors to acquire the scene information and the depth information respectively.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD

Ethernet performance testing method and device based on point-to-point testing

The invention discloses a method and device for testing Ethernet real-time service quality on the basis of point-and-point testing, and belongs to the field of Ethernet performance testing. According to the method, testing data packets with timestamp values are sent back and forth between a master device and a slave device, so that measurement of a one-way delay value and one-way delay jitter is achieved, and synchronous operation is accomplished; according to the device, the master device and the slave device are connected through an intermediate network, the master device is used for generating the testing data packets and leading the testing process, the salve device is used for receiving the data packets, and the testing process of the slave device is controlled by the master device. According to the method and device, due to the fact that delay measurement of the master device and delay measurement of the slave device are carried out according to relative clock adjustment of the master device and relative clock adjustment of the slave device respectively, the synchronizing process of the testing time can be accomplished in two steps, a whole network synchronous clock is not needed, special processing of a middle node device is not needed, the testing environment is simplified, precision, achieved by hardware, of a local timer can be at the microsecond level, and the testing process does not have any influence on the normal service.
Owner:FENGHUO COMM SCI & TECH CO LTD

Device and method for detecting road surface compaction effect

A device and a method for detecting the road surface compaction effect are provided. The device comprises a fiber bragg grating demodulator, a pressure sensor for detecting the pressure of a road surface, and a displacement sensor for detecting the thickness of the road surface, wherein the pressure sensor, the displacement sensor and the fiber bragg grating demodulator are connected. According to the invention, the principle is simple, the operation is convenient, the detection is accurate and rapid, and objective and efficient detection is implemented. The reliability and the detecting reliability are good, the manufacturing cost is low, the energy consumption is low, the scope of application is wide, the practical value is high, and the detecting device is convenient to use and maintain. The detecting method is simple and convenient, the detecting process is simple, the detecting time is short, the detecting is not affected by the outside environment, the road surface compaction effect can be rapidly and accurately detected to provide a reliable basis for the reasonable detection and construction, and the defects that the consumed time is long, the operation process is complex and the detection is largely affected by the outside environment during the detection of the road surface through a drilled core method in the prior art are overcome.
Owner:CHANGAN UNIV

Automatic detection system and method for compatibility anomaly of display

ActiveCN106652858AGuaranteed reliabilityFlexibility to adapt to testing needsStatic indicating devicesArray data structureControl signal
The invention relates to an automatic detection system and a method for the compatibility anomaly of a display. The system comprises an industrial PC, a photoelectric signal acquisition unit, a flicker signal processing unit, a Chroma signal source and a burning plate. The burning process of the display is completed through the on-line system programming process, and a related display control instruction is defined in the form of an array. After that, the software control for the OSD menu of the display is realized based on the DDC/CI protocol. Meanwhile, the "handshake" mechanism is added to ensure the reliability of control signals. At the same time, relevant test cases and the test timing are imported in the form of independent text files and excel files. Optical signals are acquired by a photoelectric sensor. The acquired signals are converted through the analog-to-digital conversion process and then a transient waveform is obtained. Furthermore, the transient waveform is subjected to the Fourier transform treatment to be converted into a power spectrum and the power spectrum is subjected to the human visual-sensitive weighted matching treatment. Finally, through the inverse Fourier transform treatment, the flicker degree is calculated. The system is high in degree of flexibility, low in cost, and high in efficiency. The test pressure of the test personnel can be reduced to a greater degree.
Owner:FUZHOU UNIV
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