37results about How to "Implement burn-in testing" patented technology

The invention relates to an aging test method and an aging test device under the multi-field coupling of humidity, heat and force. The method is used for testing polymer materials and test specimens produced by composite materials of the polymer materials, and the test is based on the dynamic monitoring to the tensile creep compliance of the materials under the multi-field coupling of the humidity, the heat and the force. The device is based on a standard humid and hot environmental box controlled by a microcomputer, a test specimen clamping and loading mechanism is arranged in a box of the device, and an electronic extensometer and a laser extensometer are arranged to form a double displacement sensor and are connected to the microcomputer through an acquisition device after the data acquisition. The method and the device have the advantages of accurate and convenient test and low cost, and are suitable for the research of viscous-elastic mechanical properties and aging performances under the operation of polymers and composite materials of the polymers.

The invention discloses an aging testing system for liquid crystal display modules. The aging testing system comprises a downloader, a main control board and multiple sub-control boards connected with the main control board, and the main control board is connected with the downloader. The downloader is used for receiving testing information of the liquid crystal display modules of multiple types of machines to be tested. The main control board is used for providing the testing information of the liquid crystal display modules of the machines to be tested for the corresponding sub-control boards connected with the liquid crystal display modules of the machines to be tested. Each sub-control board is used for generating a testing image signal, the received testing information of the liquid crystal display modules of the machines to be tested and the testing image signals are provided for the corresponding liquid crystal display modules after first signal conversion is performed so that the corresponding liquid crystal display modules can display corresponding testing images according to the signals obtained after first signal conversion is performed, and then aging testing is achieved for the liquid crystal display modules. The aging testing system can be adapted for testing liquid crystal display modules of different types of machines, and can improve testing efficiency.

The invention discloses a multiway input feedback type electronic load system comprising power input ends with a number of N, a summarizing boosted circuit and a total inverter unit, wherein the N is larger than or equal to 2. Each power input end respectively receives a one-way direct-current power signal in a one-one correspondence mode, and transmits the accessed one-way direct-current power signal to a direct current input end of the summarizing boosted circuit. The summarizing boosted circuit works in a constant voltage mode, and the direct-current power signal input by the direct current input end is summarized and then processed in a pressure boost mode. The total inverter unit is connected with a direct-current output end of the summarizing boosted circuit. The total inverter unit is used for converting the direct-current power signal which is processed in a pressure mode by the summarizing boosted circuit to be an alternating current power supply signal. The multiway input feedback type electronic load system is suitable for aging tests of a constant current power source and a constant voltage power source. According to the multiway input feedback type electronic load system, circuit structure is simple, electronic components are greatly reduced, system reliability is high and applicability is wide.

The invention discloses a dynamic ageing monitoring system and a dynamic ageing monitoring method for a switch mode power supply of a locomotive. The dynamic ageing monitoring system comprises an industrial control personal computer (PC), a peripheral component interconnect (PCI)-general purpose interface bus (GPIB) card, a PCI system, a GPIB system and an interface unit, wherein the PCI system comprises a programmed switch card and a programmed data acquisition card; the GPIB system comprises a programmed power supply and a programmed load; the industrial control PC, the programmed switch card and the programmed data acquisition card are connected with the PCI-GPIB card through PCI buses; the PCI-GPIB card performs transformation between a PCI protocol and a GPIB protocol; and the programmed power supply and the programmed load are connected with the PCI-GPIB card through GPIB buses. The technical problems that the conventional ageing monitoring system has low universality, dynamic parameters of a power supply board to be detected in the ageing process are lack of detection and result judgment is lack of data support can be well solved, so a dynamic ageing monitoring platform is provided for a switch mode power supply single board of the locomotive.