8results about How to "Implement performance testing" patented technology

The application discloses a large oil hydraulic machine proportional valve fault diagnosis device and method, and relates to the field of hydraulic component performance testing and fault diagnosis. The device comprises a hydraulic station, a proportional valve test platform and a PC terminal and a diagnosis model. The hydraulic station provides oil for the test system, the proportional valve test platform comprises a proportional valve test part and a loading part, and the two are connected in parallel with the hydraulic station through a common oil path and a stop valve. The PC terminal and the diagnosis model control the test bench hydraulic component through a PLC, and the test part is provided with a pressure sensor and a flow sensor. The application can realize static and dynamic performance testing of the proportional valve according to national standards, realize automatic detection by using PLC control, and improve test efficiency and safety. The diagnosis model adopts a BP neural network, takes feature parameters of pressure, flow and other multi-source signals after preprocessing as input, and outputs fault diagnosis results, effectively improving the accuracy and response speed of fault identification, and realizing accurate early warning of small faults of the proportional valve.

The utility model discloses a full dynamic pressure type air refrigeration system test system, which belongs to the technical field of air refrigeration test systems and comprises a rack, a centrifugal compressor and a turbo expander are arranged on the rack, and the exhaust end of the centrifugal compressor is communicated with the air inlet end of the turbo expander through a first connecting pipeline. The first connecting pipeline is provided with a pressure regulating valve, the air inlet end of the centrifugal compressor is provided with a compressor air inlet pipeline, and the exhaust end of the turbo expander is detachably connected with a turbo expander exhaust pipeline; first pressure detection elements and first temperature detection elements are arranged on the compressor air inlet pipeline and the first connecting pipeline close to the exhaust end of the centrifugal compressor, and second pressure detection elements and second temperature detection elements are arranged on the turbo expander exhaust pipeline and the first connecting pipeline close to the air inlet end of the turbo expander. According to the utility model, the matching performance test of the all-dynamic-pressure centrifugal compressor and the all-dynamic-pressure turbo-expander in different combinations can be realized; and matching performance tests under different working conditions can be carried out.

The application provides a performance test system for an ultrahigh-pressure hydraulic pump, a first test device adopts a loading valve group, a reserved valve group and an intelligent press, so that the ultrahigh-pressure hydraulic pump can be tested under various loads, the test result is more in line with actual working conditions, a press rodless cavity control valve group and an auxiliary control valve group are adopted to realize control and rapid retraction of the intelligent press, the auxiliary control valve group is used as a control system of an ultrahigh-pressure element, and the reliability and service life of the test system are increased. A second test device adopts an ultrahigh-pressure test oil circuit and a large-flow test oil circuit, so that the test system tests the ultrahigh-pressure pump and the large-flow pump, oil temperature sensors and oil pressure sensors are arranged in an oil observation circuit, an oil supplement circuit, a system oil circuit and an oil return circuit to comprehensively detect oil characteristics during operation of the test system, and an oil discharge circuit is arranged, so that the test system is quickly unloaded when a problem occurs during operation, and the safety of the system is enhanced.

This utility model discloses an explosion-proof chiller for testing new energy battery packs, relating to the field of battery pack testing technology. It includes an explosion-proof chiller body; a cylinder is fixedly connected to the inner wall of the bottom end of the explosion-proof chiller body; a test plate is fixedly connected to the top of the cylinder; a battery body is mounted on the top of the test plate; a connection socket is fixedly connected to the side end of the battery body; the battery body is placed on the test plate, and the cylinder raises the test plate and then suddenly lowers it, causing the battery body to fall onto the test plate after being suspended in mid-air, creating a bumping effect, thereby testing the battery body's anti-bumping effect. After the battery body is on the test plate, an impact ball rotates and impacts the battery body through an impact groove. A rotating cylinder causes the impact ball to rotate and impact the bottom of the battery body, generating vibration, which can test the vibration test effect of the battery body. This significantly improves the practicality and guiding significance of the test results, and helps improve the performance and safety of the battery body under complex working conditions.

This application relates to a performance testing fixture and a performance testing system for performing performance testing on an electric push rod. The performance testing fixture includes a control unit and multiple test units arranged in parallel; each test unit includes a push rod fixing device and a tension measuring device; the push rod fixing device is used to fix the electric push rod, and the tension measuring device is used to connect to the electric push rod and measure its tension value; the control unit is used to electrically connect to the electric push rod and control its telescopic movement, and to electrically connect to the tension measuring device and perform performance testing on the electric push rod based on its tension value. In the embodiments of this application, by controlling the telescopic movement of the electric push rod and performing performance testing based on the tension value during the telescopic movement, automatic performance testing of the electric push rod in a dishwasher is achieved.

The application discloses a distributed system performance dynamic simulation test method and platform based on digital twinning, relates to the technical field of digital twinning, and solves the problem of one-sidedness of distributed system performance test, and comprises the following steps: acquiring each physical node in the distributed system, identifying active nodes in the physical nodes, and collecting node static data of the active nodes; setting corresponding virtual nodes according to the node static data of the active nodes, and constructing a virtual twin system of the distributed system based on the virtual nodes and digital twinning technology; collecting node dynamic information of the active nodes in a monitoring period, and constructing a simulation test environment of the virtual twin system according to the node dynamic information; and performing performance test on the virtual twin system based on the simulation test environment, taking the performance test result of the virtual twin system as the performance test result of the distributed system. The application realizes comprehensive test on the performance of the distributed system by performing performance test on the virtual twin system of the distributed system.

The invention relates to an optical element testing system, in particular to an optical element performance testing system and method based on ultralow-temperature high-vacuum coupling, and aims to solve the problem that an existing testing system cannot test the performance of an optical element while simulating an ultralow-temperature and ultrahigh-vacuum sequential coupling environment. Precision testing equipment is protected, and all-parameter and multi-attitude stable and accurate testing of the optical element is achieved. The system comprises a testing container and a tested container which are communicated with each other, and a high-reflectivity one-way film evaporation container is arranged in the testing container and used for slowing down temperature and pressure sudden change during vacuumizing so as to protect internal testing equipment; a contact type optical element clamping cold box is arranged in the tested container, is connected with the optical element through a flexible cold chain, and is matched with a liquid nitrogen / gas nitrogen system to realize proportional temperature regulation. The device can safely and truly simulate the extreme environment of a spaceflight deep space, and achieves the stable and accurate testing of all parameters and multiple attitudes of the optical element.

The application discloses a kind of industrial robot kinematics parameter calibration method and system based on parameter separation and multi-objective optimization, belongs to industrial robot technical field, by linear-nonlinear parameter separation, introduce multi-objective minimax optimization, effectively handle the non-homogeneity problem of pose information, realize the fast, robust, high-precision robot kinematics parameter identification and compensation.Calibration method includes:1, acquisition robot end in multiple measurement poses under position information;2, the kinematics model of robot is established, and the parameter to be identified is divided into linear set and nonlinear set, to reconstruct separable optimization problem;3, based on the position information collected, construct the multi-objective minimax optimization problem with the optimization worst performance index as the target, by iteration solving linear set and nonlinear set, complete the identification of kinematics parameter;4, the optimal kinematics parameter identified finally is compensated to robot controller, and the kinematics model is updated.