488 results about "Production testing" patented technology

The invention discloses an industrial marketing management method, system and equipment based on digital twinning and a medium, belongs to the technical field of big data processing and analysis, and aims to solve the technical problem of how to collect and process various data in a cigarette marketing management process in real time, find market changes in time, improve marketing efficiency and flexibility and improve marketing efficiency and flexibility. According to the technical scheme, the method comprises the following steps: data acquisition and data cleaning: collecting full-life-cycle data of an industrial product; wherein the full life cycle data of the industrial product comprises information of each stage of design, production, test and sales; performing data modeling: performing accurate three-dimensional modeling on the industrial product by utilizing three-dimensional modeling software, constructing a virtual model of the product based on a physical law and engineering knowledge, and simulating the running state and performance of the product under various working conditions through a simulation technology; virtualizing a production scene; building a virtual product model; and simulating a virtual marketing scene.

The invention is suitable for the technical field of semiconductor testing, and provides a chip mass production testing environment recovery method and device and electronic equipment, and the chip mass production testing environment recovery method is used for carrying out anomaly detection on a second module used for executing a chip testing task. After an exception is found, a first module used for user interaction and monitoring triggers recovery in an overtime tolerance interval, at least a second module is restarted, and a mass production test environment context stored by the first module is injected, so that the second module quickly returns to a runnable state with existing batch parameters and a process state; and then the second module is automatically reconnected with the ATE test equipment, marks the current tested chip as retestable and sends the retestable chip to the chip processing equipment, so that the chip processing equipment confirms the test process and switches to the next to-be-tested chip, and the second module continues to execute the test task. According to the scheme, the continuity and the stability of the chip mass production test in the abnormal scene are realized.

The invention relates to the field of data analysis and processing, in particular to a data anomaly detection method for production testing of a brushless fan controller, and aims to solve the technical problem that in the prior art, differences of judgment of different models are difficult to effectively judge, and the data anomaly detection method comprises the following steps: S1, obtaining an original time sequence data sequence when the brushless fan controller runs, extracting a plurality of domain features from each data window to obtain an original feature tensor of each data window; s2, inputting the original feature tensor as a sample into an anomaly detection structure to obtain an isolation anomaly score and a reconstruction anomaly score; s3, performing weighted summation on the isolation anomaly score and the reconstruction anomaly score to obtain a fusion anomaly score; and S4, judging whether the fusion anomaly score is greater than a judgment threshold, and judging that the data window corresponding to the fusion anomaly score greater than the judgment threshold is abnormal. In practical application, production interruption caused by false alarm can be reduced, and equipment damage caused by missing alarm can be avoided.

The invention relates to the technical field of electronic testing, in particular to a vertical quantitative analysis method for chip mass production testing by adopting a big data analysis mode, which comprises the following steps: collecting time and error rate data of the chip mass production testing, carrying out sorting and clustering analysis on the data by adopting the big data analysis mode, identifying key distribution and abnormal points in the data, and carrying out vertical quantitative analysis on the chip mass production testing. And obtaining a time distribution analysis result. According to the method, segmentation and vertical quantitative analysis are performed on time and error rate data through a big data technology, abnormal data points exceeding a preset threshold value can be marked and rapidly identified, and the identification capability of potential problems in the production process is improved by comparing chip performances under different production batches and process parameters; through quantitative scoring and risk difference analysis between batches, the risk management and response capability is further enhanced, powerful support is provided for optimizing the chip mass production test process and parameter setting, and the test efficiency is greatly improved.

The invention provides an MES-based production line product quality test method and device, equipment and a storage medium. The method comprises the steps of obtaining product index information, data acquisition parameters and production order information; according to the production order information, equipment operation parameters are generated through the MES so as to control the production equipment unit to execute a production test; in the production test stage, the sensor unit is controlled to collect production test parameters of a product according to data collection parameters and send the production test parameters to the data transmission unit; and the MES compares the production test parameters with the product index information to obtain a production test result of the product. Real-time interaction between the MES software and hardware equipment is realized by simulating a real production environment and a real production process, various functions and performances of the MES software in the production process are comprehensively tested, and the reliability and stability of the software in practical application are ensured.

The invention provides a satellite batch production testing method, satellite batch production testing equipment and a computer storage medium, and relates to the technical field of satellite production testing. The method comprises the following steps: analyzing first test information, first technical state change information and first external factor state change information of a first batch of satellites to determine a related state variable of each test content point under each test item and an influence degree of the related state variable of each test content point under each test item on the corresponding test content point; and adjusting the first test information based on the influence degree to obtain and execute the test content. The redundancy of test items is avoided, and the test efficiency of batch production of satellites is greatly improved.

The invention relates to an independent AC cycle restart test method and system for a production test server. The method comprises the following steps: determining whether a tested server is ready to be put on shelf or not; starting the test script, and reading the position information; obtaining PDU binding information to obtain a PDU address and power supply interface information thereof; carrying out a connection test on the PDU and the tested server to determine that the tested server is correctly connected with the PDU power supply interface; and executing an AC loop restart test on the tested server. According to the invention, the physical position of the production test server and the binding relation between the intelligent PDU IP of the corresponding server and the power supply interface can be positioned, the power-on and power-off of the power supply of a certain production test server can be accurately controlled, and the tested servers can be independently operated and tested.

The invention relates to the technical field of digital information transmission and the like, and provides a BMS platform development system which comprises a firmware generation system, a development test system, a production test system and a document generation system.The firmware generation system generates product firmware supporting project customization requirements according to project input configuration of a BMS product and the project customization requirements of the BMS product, and the development test system and the production test system generate the product firmware according to the project customization requirements of the BMS product. The development test system generates a development test case set according to the item input configuration so as to test item hardware and product firmware generated by the firmware generation system, and the production test system generates a production test case set according to the item input configuration; the production test case set is used for carrying out production test on project hardware and product firmware which pass the test of the development test system to produce BMS products in batches, and the document generation system inputs and configures projects to generate product documents corresponding to the BMS products produced in batches, so that the code maintenance difficulty is reduced, and the production efficiency is improved. The configuration difficulty and workload of development testing and production testing scripts are reduced, and the development efficiency is improved.

The invention relates to the field of vacuum circuit breaker production testing, and discloses an outdoor pole-mounted vacuum circuit breaker testing device which comprises a machine base, two side frames symmetrically distributed are slidably arranged on the machine base, a mounting plate is fixed to the side frames, a sliding groove is formed in the mounting plate, a mounting base is slidably arranged in the sliding groove, and a stand column is fixed to the mounting base. A first air cylinder is arranged on one side of the installation base and fixed to the installation plate, the output end of the first air cylinder is fixedly connected with a flat plate, an S-shaped arc groove is formed in the flat plate, the stand column is in sliding connection with the S-shaped arc groove, a fixing rod is fixed to the installation base, and one end of the fixing rod is fixedly connected with a detection block. The flat plate is used for driving the detection block on the testing device to translate, dynamic and static balance testing is carried out on the vacuum circuit breaker, the use stability and safety of the vacuum circuit breaker product are judged, the strength of the vacuum circuit breaker can be detected in the testing procedure operation of the vacuum circuit breaker, and therefore the quality of the produced vacuum circuit breaker product is detected. And the yield of products is improved.

The invention discloses a test platform and method for an energy storage converter, and belongs to the technical field of energy storage. A 380V power grid is sequentially connected with a first circuit breaker, a first contactor, a transformer and the alternating current side of a first PCS; the direct current side of the PCS to be tested is sequentially connected with the second circuit breaker, the second contactor and the direct current sides of the first PCS and the second PCS; the alternating current side of the to-be-tested PCS is sequentially connected with a third circuit breaker, a third contactor and the alternating current side of the second PCS; the pre-charging module is connected in parallel with the first PCS; the unit controller is respectively connected with the first contactor, the second contactor, the third contactor, the pre-charging module, the PCS to be tested and each module in the AC / DC combined source. Existing products are reasonably built, a battery system does not need to be configured, laboratory arrangement and testing of experimenters can be facilitated to the maximum extent, the testing efficiency is improved, and the construction cost is reduced. Meanwhile, the operation power of the test platform can be expanded according to test requirements, and the production test efficiency is improved.

The invention relates to the field of product testing, in particular to an efficient production testing method, device and system for TBOX testing. The method comprises the following steps: selecting a plurality of TBOXs for communication connection; sorting the test items to obtain an item sequence; testing each TBOX item by item according to the item sequence to obtain an individual result of each TBOX; simultaneously testing all TBOXs item by item according to the item sequence to obtain an overall result; performing communication quality comparison on each test item according to the overall result and the individual result of each TBOX to obtain an interference value of each test item; adjusting the sequence of the test items in the item sequence according to the interference value of each test item to obtain a plurality of test sequences; according to the test sequence, the test routes are set differently; and carrying out yield test on the TBOX by adopting a test route. According to the invention, the problem that the efficiency and the quality of the TBOX cannot be considered in the production and measurement process is solved.

The utility model discloses a ball valve housing sealing pressure test bench, and specifically relates to the valve production test field, comprising a test pool, one side of the bottom of the test pool is provided with a water inlet and outlet hole, one side of the test pool is provided with a support column, the top of the support column is connected with an air inflation tank, and the air inflation tank is connected with the air inflation tank. Two sets of connecting protruding blocks are arranged on the sides, close to the testing pool, of the tops of the supporting stand columns, a detection connecting frame is connected between the two sets of connecting protruding blocks, the detection connecting frame is in a U shape, air cylinder mounting blocks are arranged on the inner side of an opening of the detection connecting frame, and a clamping air cylinder is connected between the two sets of air cylinder mounting blocks through buckles. A fixed clamping block is arranged on the inner side of the end, away from the clamping air cylinder, of the detection connecting frame, and a clamping rotary disc is slidably connected to the inner side of the detection connecting frame. According to the utility model, when the sealing performance of the ball valve housing is detected, the switch of the valve can be automatically turned on and off, the detection result is obvious, and the air leakage part is easy to observe.

The invention discloses a composite limit test control method and device for a source table. The method comprises the following steps: firstly, responding to a digital trigger signal to initialize a source table test system, and setting test working parameters and limit test group parameters; then, the currently obtained measurement data is sequentially compared with each limiting test group parameter to obtain a comparison result; executing a limiting test comparison process according to the enabling starting state identified by the obtained comparison result; and finally, outputting a test result signal corresponding to each limiting test group parameter. Due to the fact that the source meter is changed from a single measuring instrument to an intelligent testing and control node on a production line, real-time data analysis and decision making are achieved through composite limitation, seamless linkage with the production line is achieved through output testing result signals, and finally full-automatic, high-efficiency and high-reliability production testing and sorting are achieved.

The present invention discloses a satellite batch automated test system and its implementation method. The system is based on a B / S architecture and includes: a main test data processing center for parsing, interpreting, monitoring, processing and storing data, forwarding instructions to the front-end management according to authority, and providing data subscription services for application terminals; a test console for testing implementation and operation control; front-end management for connection management between the system and the front-end equipment; application terminals for system management, data maintenance management and real-time data monitoring of satellites across models; a data center for data access; a monitoring center for an overview of the system operation status and server hardware management; an equipment service cluster for starting ground equipment associated with the satellite, receiving on-board and ground instructions, sending them to the corresponding equipment, and returning success or failure information. The present invention can simultaneously meet the satellite short-cycle, low-cost, high-efficiency, and batch production test requirements.

The invention discloses a copper flotation froth layer thickness prediction method, device and equipment and a storage medium, and relates to the technical field of production detection in the flotation process. The method comprises the steps that historical flotation parameter data in the historical flotation process and historical data corresponding to foam layer thickness parameters are obtained; performing foam layer thickness correlation analysis on the historical flotation parameter data to obtain target parameters and historical data corresponding to the target parameters; performing regression analysis according to historical data corresponding to the foam layer thickness parameter and historical data corresponding to the target parameter to obtain a sample regression function; and predicting new data corresponding to the thickness parameter of the foam layer according to the new data corresponding to the target parameter and the sample regression function. Therefore, the target parameters related to the thickness parameters of each foam layer are determined, and the statistical relationship between the thickness parameters of the foam layer and the target parameters is fitted to obtain the sample regression function, so that the prediction precision of the thickness of the foam layer is improved based on the method of the sample regression function.

The invention discloses a test machine monitoring method and system, computer equipment and a storage medium, and the method comprises the steps: obtaining machine correction data sent by all test machines, the machine correction data comprising a machine ID, coefficient correction data and a chip type ID, the coefficient correction data is a comparison correction result of the test data of the corresponding test machine and the standard data; pairing the chip type ID with a preset type database to obtain a preset threshold range group of a corresponding type; whether the coefficient correction data is within a preset threshold range group is judged, if yes, a production test instruction is sent to a corresponding test machine according to the machine ID, so that the test machine performs production test work according to the coefficient correction data, and if not, the test machine is controlled to give an alarm. According to the invention, the machine checking and correcting work of all testing machines can be monitored, and the accuracy of the machine checking and correcting work is improved, so that the production quality and the production efficiency are improved, and the burden of manual monitoring is reduced.

The invention discloses a rapid connection testing device for a printed circuit assembly board, and aims to solve the problems of high cost, low connection density, large occupied space, tedious operation and the like in the existing testing technology. The device comprises a quick-connection probe module, a positioning tray and a pull pin, the quick-connection probe module comprises a quick-connection probe seat module, a protective cover module and a spring, positioning and locking are realized by multiplexing existing mounting holes of a to-be-tested PCB, electrical connection is realized by utilizing contact of a spring probe and a test point, a quick-connection positioning guide sleeve, a lock bead and a quick-connection ring are combined to form a quick locking / unlocking structure, and the quick-connection probe seat module and the protective cover module are connected with the pull pin. The conductive bushing and the grounding support ring form a grounding loop in cooperation with auxiliary positioning of the guide pin. A special test connector is omitted, so that the material cost is reduced; the connection density and the signal rate are improved, and the PCB space is saved; the operation efficiency is improved through the quick connection structure, and the device is suitable for efficient mass production testing.

The invention belongs to the technical field of motor control, and discloses a magnetic encoder quadrature error adaptive compensation method, which comprises the following steps of: judging whether a correction coefficient is empty or not, and if so, executing a correction coefficient calibration process; otherwise, entering a single sampling point correction coefficient verification process. According to the invention, a hardware feedback circuit does not need to be designed, digital processing can be directly carried out on sine and cosine signals collected by the magnetic encoder, quadrature error adaptive compensation under the condition of unknown signal frequency is realized, the detection precision and reliability of the magnetic encoder can be improved, the production test efficiency is effectively improved, and the time cost is reduced.

The invention discloses a testing system and method, electronic equipment, a storage medium and a product, and relates to the technical field of testing, and the testing system comprises a to-be-tested board, the electronic equipment and a conversion device; the to-be-tested board is in communication connection with the electronic equipment, and the to-be-tested board is provided with a memory disk slot; the electronic equipment is in communication connection with the conversion device and is used for sending a debugging instruction; the conversion device is connected with the to-be-tested board through the memory disk slot, the conversion device is used for converting the preset memory into a target memory disk according to the debugging instruction so as to test the to-be-tested board, and the target memory disk is a computing high-speed interconnection memory disk. The technical problem that the cost is high in the prior art is solved, the preset memory is converted into the computing high-speed interconnection memory, and the to-be-tested board is tested by using the target memory disk, so that the technical effect of reducing the production test cost during the production test is achieved.

The invention discloses a heat dissipation performance evaluation method and system for a backlight source. The backlight module is powered on in a first test period, a module infrared image is obtained, color features are extracted based on a color histogram, and backlight sub-regions are divided by adopting agglomeration hierarchical clustering; in the second test period, the sub-regions and the whole are electrified respectively, RGB color features and temperature differences of two tests are extracted, color feature differences and temperature differences are calculated, the heat dissipation index of each region is evaluated, and the index can comprehensively reflect the heat dissipation performance of different regions and effectively guide the backlight module to carry out structure adjustment and production optimization; and the production test efficiency and the performance evaluation accuracy are improved.

The utility model relates to the field of solid state disk production testing equipment, and discloses solid state disk testing equipment, which comprises a solid state disk testing machine provided with a plurality of testing ports, a testing substrate, a solid state disk limiting mechanism, a plugging driving mechanism and a plurality of testing plugging heads, the test substrate is used for fixing the solid state disk limiting mechanism and the plug-in driving mechanism, and the solid state disk limiting mechanism is located on one side of the plug-in driving mechanism and can limit a plurality of stacked solid state disks so that sockets of the solid state disks can correspond to the plug-in driving mechanism. The plurality of test plugs are horizontally and fixedly arranged on the plug driving mechanism in an independently detachable manner and are respectively connected with a plurality of test ports on the solid state disk test machine, and the plurality of test plugs are correspondingly arranged up and down and are driven by the plug driving mechanism to perform plug operation with the solid state disk limited in the solid state disk limiting mechanism. A plurality of solid state disks can be subjected to loading test or unloading at one time, the operation is simple and rapid, the efficiency is high, and the test stability is high.

The invention discloses a data processing method and system, electronic equipment and a storage medium, which are applied to a production test, a master equipment end and a slave equipment end carry out data transmission through an SPI interface, and the slave equipment end is coupled with a storage device to be tested, the method comprises the following steps: the master equipment end transmits a target command to the slave equipment end through the SPI interface, sending the target command to the to-be-tested storage device from the device end, and obtaining a command execution result fed back by the to-be-tested storage device; and the master device end responds to a reply signal sent by the slave device end through the GPIO pin and sends a result request command to the slave device end, so that the slave device end returns a command execution result. According to the invention, on the basis of the SPI transmission protocol, data transmission is carried out through the SPI interface, and the reply signal is transmitted through the additional GPIO pin, so that the slave device end can actively inform the master device end to complete confirmation reply to the master device end, and high efficiency, reliability and integrity of data transmission are ensured.

The invention discloses a production test system and method for a Bluetooth module, relates to the technical field of Bluetooth module testing, and solves the problem that the stability of electronic components in the Bluetooth module is poor due to the fact that too high temperature is not considered in the prior art. And over-high humidity can cause water vapor in the air to be condensed on a circuit board in the Bluetooth module, so that the insulating property is reduced. The method comprises the steps of collecting environment data of a target area in real time; the environment early warning evaluation coefficient is calculated based on the environment data, and whether the early warning information is sent or not is judged based on the environment early warning evaluation coefficient and the preset environment threshold value, so that the problem that the influence of environment factors on the production test of the Bluetooth module is not considered in the prior art is solved; by simulating the electromagnetic interference scene and controlling the output power and the frequency point of the Bluetooth tester, the signal intensity change and the error rate of the to-be-tested Bluetooth module can be accurately measured and analyzed, and the performance of the Bluetooth module in different electromagnetic interference scenes can be evaluated.

The utility model belongs to the technical field of computer production testing, and particularly relates to a computer button durability testing device which comprises a vertical plate and a counting assembly, a base assembly is arranged at the bottom of the vertical plate, a fixing block is fixed in the middle of the rear outer wall of the bottom end of the vertical plate, and positioning knobs are in threaded connection with the rear outer wall of the bottom end of the vertical plate in a bilateral symmetry mode. A driving motor is fixedly installed on the outer wall of the middle of the rear portion of the vertical plate, an oval block is fixedly connected to the output end of the driving motor, a counting assembly is fixedly installed in front of the top of the vertical plate, guide rods are fixed to the outer wall of the front portion of the vertical plate in a bilateral symmetry mode, and movable plates are symmetrically arranged on the outer sides of the upper end and the lower end of each guide rod in a sliding mode; a spring is arranged on the outer side of the middle of the guide rod, and the two ends of the spring are fixedly connected with the two movable plates correspondingly. According to the utility model, the pressing column and the isolation plate are synchronously adjusted, so that the counting accuracy can be ensured, the condition of excessive reading or insufficient reading is avoided, and the reliability of a test result is higher.

The invention provides a device and a method for mass production testing of high-speed interface chip performance, and belongs to the technical field of chip mass production testing. The system comprises a test machine and a test board, an attenuation loopback link is designed on the test board, the attenuation loopback link has a predetermined attenuation value, the test machine provides a test function and test resources, a chip is fixed on the test board through a socket, and the test board is connected with the test machine. An uplink and a downlink output by the chip are respectively connected with the attenuation loopback link through a multi-path sending end and a receiving end, and the test machine is connected with the test board through a JTAG (Joint Test Action Group) interface. Meanwhile, the SERDES performance of the chip is comprehensively tested through a series of operation processes including power-on, configuration, correct code stream test, error injection test and result judgment, so that the quality and the performance of the chip are ensured to meet the requirements.

The invention relates to the technical field of oil and gas well oil testing and production testing, in particular to a gas well liquid production profile and underground television integrated testing tubular column and a testing method.The gas well liquid production profile and underground television integrated testing tubular column comprises a photoelectric composite cable, a continuous oil pipe, a centralizer, a check valve, a light source and an underground television terminal, and the continuous oil pipe, the centralizer, the check valve, the light source and the underground television terminal are sequentially connected together from top to bottom; a plurality of circulating well washing nozzles are arranged on the outer side of the check valve at intervals, the lower end of the photoelectric composite cable sequentially penetrates through the coiled tubing, the centralizer and the check valve and then is connected with the light source and the underground television terminal, and the photoelectric composite cable can collect temperature data and sound data. The device is reasonable and compact in structure, collection of liquid production profile data and monitoring of the opening condition of each perforation cluster are completed through one test tubular column, and the problems that the construction period is long and the cost is high when gas well liquid production profile monitoring and underground television perforation monitoring after fracturing are conducted respectively are solved; and powerful guidance is provided for reservoir and fracturing effect evaluation and fracturing scheme optimization.

The invention relates to an inter-well sand body connectivity analysis method and system under a large well spacing, and belongs to the technical field of oil and gas development of large-well-spacing oil fields. The method comprises the steps that a development well pattern under the large well spacing is divided into a plurality of well groups; based on the production data, obtaining an inter-well sand body connectivity judgment result on a well plane in each well group; on the basis of the inter-well sand body connectivity judgment result on the plane, whether inter-well sand body connectivity analysis is ended or not is selected, and if not, the inter-well sand body connectivity judgment result on the inner section of each well group is obtained on the basis of production test data; and based on the inter-well sand body connectivity judgment result on the section, inter-well sand body connectivity analysis under the large well spacing is completed. According to the method, the inter-well sand body connectivity of the production well is analyzed from the aspects of production data and production test data, inter-well sand body distribution is restrained and depicted, and the oil reservoir flooding condition and the seepage barrier distribution mode in the reservoir are analyzed.

The invention belongs to the technical field of production testing in the manufacturing industry, and particularly discloses a production testing system and method based on the manufacturing industry, a terminal and a medium, and the system comprises a back-end service layer which is in communication connection with a front-end service layer for information interaction, dividing the business logic of the production test into a plurality of business modules which can be independently managed through a module registration mechanism; the equipment interaction layer comprises an equipment driving interface, at least one equipment driving plug-in and an equipment communication unit; and the system integration layer is used for carrying out information exchange with a manufacturing execution type service system through a standardized data interaction mode so as to obtain and send the production test data. Test data is aligned with a manufacturing execution type business system through a standardized data interaction mode, connection between a production test link and manufacturing process management is realized, and the overall cooperative capability of a production line is improved.

The invention relates to the technical field of PCBs, in particular to a control method and system for automatic inspection of appearance defects of a PCB, a storage medium and computer equipment. According to the method, the determined natural defects can be reserved through first-time division, so that the natural defects can be further studied subsequently, the derivative defect information set is subjected to second-time division by comparing the correlation value with the correlation threshold value, and therefore pseudo defect information completely composed of shadows in the derivative defect information set is removed, and the accuracy of the result is improved. The method comprises the following steps of: dividing and extracting a derivative defect information set, extracting composite defect information jointly formed by shadows and real defects in the derivative defect information set, enabling subsequent appearance defect detection to be more targeted through two times of division and extraction, reducing unnecessary processing steps and resource waste by rejecting the derivative defect information which does not influence the performance of the PCB, and improving the detection efficiency. In a large-scale PCB production detection process, defect information which really needs to be concerned can be rapidly screened out, and the efficiency of the whole detection process is improved.

The invention discloses a solid state disk testing method and device for big data storage and a storage medium, and relates to the technical field of big data storage.The method includes the steps that multi-dimensional production testing of covering components, processes, functions and reliability is executed, the result is subjected to digital scoring, and the comprehensive quality score Qtotal is calculated based on the preset weight; further extracting a production sample to be verified on a benchmark test platform for simulating actual application of a customer, establishing a sample library for marking customer standard conformity states and corresponding Qtotal and sub-item data, accurately aligning internal test standards with actual requirements of the customer in a data driving mode, dynamically adjusting test parameters through statistical modeling and algorithm iteration, and finally obtaining the standard conformity state of the customer. Therefore, the over-test problem is scientifically quantified and optimized, on the premise of ensuring that the solid state disk meets the real reliability requirement of a client, excessive elimination is remarkably reduced, the test cost and time are reduced, and self-adaptive balance of the production test standard between economical efficiency and reliability is achieved.