69results about How to "To achieve the purpose of testing" patented technology

The invention relates to a test bench for testing the working conditions of a motor under different temperature environments. One side of a test environment adjustment and control box (2) is provided with a fixing rack (1); the fixing rack (1) is provided with an installation stage (3); the installation stage (3) is provided with a servo motor (4); the main shaft of the servo motor (4) faces the test environment adjustment and control box (2) and is connected with one end of the main shaft of a torque sensor (5); the other end of the main shaft of the torque sensor (5) is connected with one end of the main shaft of a seal box sealing assembly (6) installed at the inner wall of the test environment adjustment and control box (2); and the other end of the main shaft of the seal box sealing assembly (6) is connected with the main shaft of a test motor (7). The test bench of the invention has the advantages of simple structure, convenient operation and high detection speed, and can detect the working conditions of the motor under different temperatures.

The invention relates to the field of automated testing, in particular to a PCIE (Peripheral Component Interconnect Express) equipment link connectivity detection system and method. The method comprises the following steps: reading link state information in an attribute file of PCIE equipment to detect link connectivity between the PCIE equipment and downstream equipment, and performing control to realize an action process in which a link state between the PCIE equipment and the downstream equipment becomes disconnected from a stable connection and then recovers; and judging whether link state information values between the PCIE equipment and the downstream equipment before and after an action are equal or not to verify whether a link connection of the PCIE equipment succeeds or fails. Through adoption of the system and the method, dynamically-varying link connectivity of the PCIE equipment can be verified rapidly and accurately, and a testing aim is fulfilled more effectively.

A device for testing a stress state of an e-shaped elastic strip of a railroad fastener is disclosed. The device comprises a jack, a data collecting processor, a data displaying screen, a stress holder with which a middle leg of an e-shaped elastic strip to be tested are assembled, an electronic displacement meter used for measuring a vertical displacement of a toe end of the e-shaped elastic strip to be tested and a strain transducer adhered to the surface of the e-shaped elastic strip to be tested. The data collecting processor and the data displaying screen are separately fixed to the stress holder. The jack is disposed at a bottom plate of the stress holder. The top of an ejector rod of the jack is provided with a force transducer propped against the bottom surface of the toe end of the e-shaped elastic strip to be tested. The device can effectively and rapidly test the stress state of the e-shaped elastic strip on site, a testing result is further compared with theoretical analysis results and standards, and the stress state of the e-shaped elastic strip can be evaluated.

The invention discloses a high-frequency transformer common-mode noise and conduction radiation test method. It prepares two sets of channels and connection line fixtures that have been connected with a signal generator and an oscilloscope in advance. During the test, only the transformer to be tested needs to be inserted into the connection line. On the line diagram fixture, the connection can be quickly formed, and then the signal is poured into the signal through the signal generator, and the signal is monitored by using a test lead on the first channel of the oscilloscope to confirm whether the input reference signal is correct. The test pen monitors the coupling voltage VPP value as the test result to determine the voltage, and finally compares the coupling voltage monitored by the second channel of the oscilloscope with the good / defective product data in the database to determine whether the transformer tested this time is a good product. By using a signal generator and an oscilloscope for coupling voltage measurement, this method effectively considers the potential distribution of the transformer coil winding, the winding structure and the influence of the copper foil of the shielding layer, thereby improving the measurement accuracy.

The invention provides a sound-insulating box, a testing device applying the same and a testing method thereof. The sound-insulating box adopts a structure with nestification of an outer box body and an inner box body; a vibration-insulating pad is used for supporting between the two box bodies, and can eliminate the influence of the physical vibration of the outer box body on the inner box body effectively. When the sound-insulating box is in use, a cavity between the inner box body and the outer box body is in a vacuum state, sound can not spread in vacuum, so that the sound outside can be effectively insulated; meanwhile, due to a vibration-reducing locking chain and a vibration-reducing pad of the testing device, the influence of vibration on the sound-insulating box is also effectively reduced, so that the purpose of testing the SNR (Signal-to-Noise Ratio) of a microphone is well realized; in addition, during testing, the cavity between the inner box body and the outer box body of the sound-insulating box is vacuumized instead of directly putting a product in the vacuum environment for testing, so that the damage of vacuumizing to a vibration diaphragm of the microphone product can be effectively prevented; the testing device also can be used for laboratories and production lines to realize testing for the performance parameters such as sensitivity, background noise and THD (Total Harmonic Distortion) of microphones.