40results about How to "Comprehensive test parameters" patented technology

The invention relates to a spaceborne measurement and control transponder self-testing system and method based on a lower computer, and aims to overcome disadvantages in the prior art, develop the self-detection and self-testing functions of a spaceborne measurement and control transponder, and transplant a part of ground test tasks onto a satellite, so that intelligent and batch production requirements of satellite test tasks can be rapidly responded. On the basis of the existing testing system and method and experiences, a build-in test BIT technology is introduced in single machine design of the spaceborne measurement and control transponder; therefore, due to software function configuration, after receiving a ground uplink self-testing instruction, the measurement and control transponder monitors and interprets related telemetry parameters, obtains and analyzes the main function and the internal working state of the core module of the measurement and control transponder autonomously and rapidly, and completes telemetry downloading of a self-testing result; and thus, the spaceborne measurement and control transponder has a module self-testing function. By means of the spacebornemeasurement and control transponder self-testing system and method based on the lower computer disclosed by the invention, the comprehensive testing efficiency and the automation degree of the satellite are improved; furthermore, the original normal working mode is not influenced; and the spaceborne measurement and control transponder self-testing method is high in universality and easy to expand, and applied to other single machine equipment on the satellite.

The invention provides a spacecraft separation test system and method, and the system comprises a gravity balance device, a suspension device, a suspension point adjustment device, an inertia testing device, a photographing device, and a time signal measurement device. A second separation test piece is fixed with the ground, and a first separation body is connected with the gravity balance device through the suspension point adjustment device and the suspension device. The gravity balance device outputs a balance force, and simulates a weightless environment. After separation, an upper separation test piece can freely rotate at six freedom degrees, and the inertia testing device is used for testing the acceleration and angular speed of the separation body in a separation process. The photographing device tests the separation speed of the separation body, and the time signal measurement device separates time. After the testing of separation parameters, the gravity balance device carries out the deceleration buffering of the separation test piece. The method achieves the complete measurement of separation characteristic parameters of a spacecraft, is high in testing precision, is simple and convenient to operate, is high in efficiency, is high in adaptability, and is safe and reliable.

The invention discloses a dual-arm backward erosion corrosion testing device. The dual-arm backward erosion corrosion testing device comprises a bracket, a test groove, a computer feedback control system, an electrochemical workstation and two groups of transmission systems, wherein a heater is arranged in the test groove; each group of transmission systems comprises a frequency converter, a rotary table, a sample frame, a revolving shaft and a motor connected with the frequency converter; the motors are connected with upper ends of the revolving shafts; lower ends of the revolving shafts are vertically connected with the rotary tables; the sample frames are vertically connected with the revolving shafts; the computer feedback control system comprises a computer and a control cabinet; the heater and the two frequency converters are connected with the control cabinet; the control cabinet is used for controlling the two groups of transmission systems to drive the two revolving shafts to rotate reversely in order to drive the sample frames on the two rotary tables to rotate in the test groove; outer walls of the revolving shafts are provided with electrochemical assemblies which are connected with the electrochemical workstation, and rotation speed sensors which are connected with the computer. By adopting the dual-arm backward erosion corrosion testing device, dual-shaft reverse rotation is adopted, so that a more accurate relative motion speed can be obtained during rotation of a sample, the flow state stability of a medium can be improved, and an optimal erosion effect is achieved.

The present invention discloses a method for measuring transient state optical nonlinearity of a material. According to the method, a laser beam is divided into two laser beams such as pump light and detection light, the pump light passing through delay line is focused onto a sample to be measured to make the non-linear sample produce optical nonlinearity, the detection light passing through the sample is divided into two beams through a light splitter, one beam directly enters a first detector, and the other beam passes through a round baffle, then passes through a round small hole, and finally enters a second detector; and the method is characterized in that the round baffle is placed in the detection optical path in a far filed manner, and the measurement steps comprise: (1) placing the sample to be measured, and respectively collecting the energies of the detection light at different times by using the two detectors, and (2) processing the detection light energy curves at different delay times to obtain the optical nonlinearity parameter. According to the present invention, the measurement system working according to the method of the present invention has advantages of high sensitivity, simple data processing, concurrent nonlinear absorption and refraction measurement, no requirement of separation, and the like.

The invention relates to a method and a device for testing the communication reliability of a tire pressure monitoring system. The method comprises the following steps: sending testing data through triggering emitters corresponding to all tires; receiving testing data sent by all emitters by a receiver, forwarding the received testing data to a central processing unit; and determining the communication reliability of each emitter and the receiver by the central processing unit according to the received testing data. Compared with the prior art, the method for testing the communication reliability of the tire pressure monitoring system, provided by the invention, is high in testing efficiency, simple in operation and high in automation degree, and can be applied to the standing test of earlier-stage communication reliability of a tire pressure monitoring system product, the test of the communication reliability of the development stage, the detection of the communication reliability of the production stage, and the detection of the communication reliability of the client verification stage.

The invention discloses a phase object Z-scan-based pump-probe method, which includes the following steps: an incident laser beam is split into two beams, the beam with high intensity is pump light, the beam with low intensity is probe light, and the pump light is delayed and focused on a non-linear sample to be tested, so that the sample to be tested, which is in the ground state, generates non-linear absorption and non-linear refraction; the sample to be tested is located on the focal plane of a lens in a probe light path, a round diaphragm and a round baffle, the centers of which are superposed with the optical axis, are placed at a far-field position in the probe light path behind the sample to be tested, the emergent probe light is split into two beams by a spectroscope, one of the beams directly enters a first probe, and the other beam enters a second probe after passing through the diaphragm and the baffle. A measuring system which operates according to the method is highly sensitive and can simply process data, non-linear absorption and non-linear refraction can be measured simultaneously rather than separately, and the method has the advantages of accurate measurement results and the like.

The invention discloses a multistage thermoelectric cooler parameter vacuum testing device which comprises a vacuum cavity, a vacuum pump, a water-cooling head, a temperature control cooling water circulation device, a heating resistor module, a cold-end temperature measurement resistor, a hot-end temperature measurement resistor, a direct current power source, and a data processing and displaying module. A vacuum pumping valve and an air vent valve are arranged on the vacuum cavity. The vacuum cavity is sealed with the water-cooling head through a vacuum rubber ring and connecting screws. A hot end of a thermoelectric cooler achieves heat dissipation and temperature control through the water-cooling head and the temperature control cooling water circulation device. The data processing and displaying module is used for carrying out real-time control, data processing and result displaying on appliances in the device. Through adoption of the multistage thermoelectric cooler parameter vacuum testing device, the current-voltage response relation and the current-refrigerating capacity relation of the multistage thermoelectric cooler, the refrigerating efficiency of the multistage thermoelectric cooler under different heat dissipation conditions and other parameters can be obtained. The multistage thermoelectric cooler parameter vacuum testing device is simple in structure, convenient to operate, high in measuring accuracy, and capable of effectively preventing a cold end of the thermoelectric cooler from dewing in the testing process of large temperature difference.

The invention discloses a device for measuring optical non-linearity of a material by single-pulse flat-top light. A round small hole and a round baffle are arranged in a light path of a detection light after passing through a specimen, and the nonlinear transmittance of the open pore as well as the far-field round small hole and the round baffle combination is measured by the measuring method under the action of single-pulse, so as to determine the nonlinear absorption and nonlinear refraction coefficients of the material. When the measuring device works, the measuring system is simple in light path, the measuring sensitivity is extraordinary high, the data processing is simple, single pulse measuring is realized, the specimen is not needed to be moved, nonlinear absorption and nonlinear refraction can be simultaneously measured, and the measuring cost is greatly reduced.

The invention discloses a cable detection board, a cable detection method, and line sequence, impedance, insulation and aging detection methods. The cable detection board comprises N first detection switches. The output end of each first detection switch is connected with the input end of a second detection switch through a to-be-detected cable. The input ends of the N first detection switches are connected with at least one first function selection switch. The output end of the N second detection switches are connected with at least one second function selection switch. The problem that the line sequence is difficult to detect in the prior art is solved. The cable detection board and the detection methods have the advantages of comprehensive test parameters, low cost, low requirement on light source, line color and terminal type, wide application scope, simple wiring, and easy operation.

The invention relates to the technical field of LCR testing, and discloses a multi-channel high-precision LCR testing system. Themulti-channel high-precision LCR testing system comprises a plurality of scanning cards which are connected with a product to be tested and have the same structure, and measuring cards which is arranged opposite to the scanning cards, the plurality of scanning cards are connected with the measuring card through a back connecting plate, the scanning cards are used for realizing channel switching, the measuring cards are used for realizing an LCR test, the back connecting plate is used for realizing signal transfer, the back connecting plate is connected with a main control board, and the main control board is used for realizing signal control on the measuring cards and the scanning cards. According to the system, synchronous measurement of a plurality of measuring plates is realized, the measuring plates can be randomly corresponding to one scanning plate or a plurality of scanning plates, and the application is flexible.

The invention discloses a backend detecting method for diodes and audions. The method comprises the first window testing and the second window testing, wherein the first window testing comprises the potential risk testing, the no-risk testing and the key testing; the second window testing comprises the no-risk testing and the key testing; the key testing mainly comprises the testing of parameters including forward voltage, current magnification times, leak current, forward direct current and maximum circulation current. The method comprises the two testing steps, the accuracy of testing is improved, the number of testing parameters is large, the detection range is wide, and as the potential risk testing is arranged, the reverse breakdown, large saturation current, large current opening and large current gains of the diodes and the audions are tested, the normal rate of the diodes and the audions to work under the potential risk state is increased, the performance of the diodes and the audions is better after testing, and hidden defective diodes and audions are eliminated.

The invention provides a handheld digital integrated circuit parameter tester and relates to an integrated circuit parameter tester. The handheld digital integrated circuit parameter tester comprises a power management module, a central control module, a chip test interface, a communication module and a man-machine interface module. The output end of the power management module is connected with the power input end of the central control module. The central control module comprises a single-chip microcomputer I and a single-chip microcomputer II, wherein the single-chip microcomputer I is connected with the chip test interface, the single-chip microcomputer II is directly connected with the communication module and the man-machine interface module through I/O pins, and the single-chip microcomputer I and the single-chip microcomputer II are connected with each other directly through an SPI bus. The communication module comprises a serial communication interface chip and a peripheral circuit of the serial communication interface chip. The output end of the communication module is connected with the input end of an upper computer. The handheld digital integrated circuit parameter tester has the advantages that functions are complete, running is stable, operation is simple, the size is small, and the cost is low; the handheld digital integrated circuit parameter tester can serve as an educational instrument or a detection instrument, thereby being suitable for being popularized to school laboratories or electronic amateurs.

The invention discloses a photocoupler testing device, which comprises a power module, an MCU module, a communication module, a first testing module, a second testing module and a third testing module, wherein the power module is electrically connected with the MCU module, the communication module, the first testing module, the second testing module and the third testing module respectively; and the MCU module is electrically connected with the communication module, the first testing module, the second testing module and the third testing module respectively. The electrical appliance parameters of the photocoupler are measured respectively by the first testing module, the second testing module and the third testing module respectively, the device has a low price, the detected parameters are multiple, the product quality and the detection efficiency can be improved, the product fault rate is reduced, and the overall stability is improved.

The invention discloses an integrated management method for linear motor suspension test bench detection, mainly to solve the technical problems that the existing rail transit linear motor detection fails to reach the standard and the detection and management technology is incomplete and the like. The key points of the technical scheme are that the method comprises test process management, test project classification management, test parameter classification management, and test result and quality evaluation management. The method is mainly used for integrated detection and management on a rail transit linear traction motor suspension simulation test bench.

The invention provides an experimental table device for testing gap exciting force characteristic of a front cover plate of a centrifugal pump. The experimental table device is used for detecting thefront cover plate and comprises a shell, a spindle and a base, both the shell and the front cover plate sleeve the spindle, a gap is formed between the shell and the front cover plate, and a measuringloop is formed; the measuring loop is connected with a drainage tube, a workbench and a propelling block are slidably arranged at the top of the base and fixedly connected, a gasket is arranged at the top of the workbench, the shell is positioned at the top of the gasket, a threaded hole is formed in the propelling block and matched with a screw in use, and the screw is fixedly connected with a valve. Only the front cover plate and a spindle set part connected with the front cover plate need to be mounted and demounted, so that the experimental table device is simple and convenient to mount and demount, and no damage is caused to other parts in the process of mounting and demounting, so that experimental efficiency is improved greatly, experimental period is shortened, experimental accuracy is improved, and experimental errors caused by other factors are reduced.

The invention discloses a combined test method for testing strength and rheological properties of marine ultra-soft soil, and belongs to the technical field of offshore engineering. The method is based on the advantages of a full-flow penetrometer in the aspect of strength test and the advantages of a rheometer in the aspect of shear strain rate test, the method comprises the following steps of: respectively testing a marine ultra-soft soil sample by adopting two types of devices; and calibrating a strength result measured by the rheological test part by taking a strength value measured by thestrength test part under the reference shear strain rate as the standard strength, and correcting the strength curve measured by the rheological test part according to the calibration result, therebyobtaining the strength and rheological property parameters of the marine ultra-soft soil. The test method provided by the invention has the characteristics of the reliable strength test result (whichcan be as low as 0.001 kPa), the wide shear strain rate test range (which can exceed 100s-1 or is less than 0.001s-1), the rich test parameters (undrained shear strength, sensitivity, yield stress and viscosity) and the like, and technical reference is provided for the mechanical property test of the marine ultra-soft soil in offshore engineering.

The embodiment of the invention discloses a test bench for a multi-stage servo valve, and the test bench comprises a workbench which is used for arranging a to-be-tested servo valve; the test oil pressure oil supply device is arranged on the workbench and used for supplying test oil to the servo valve to be tested; the pilot oil supply device is arranged on the workbench and used for supplying pilot oil to the servo valve to be tested; the test oil pressure oil supply device and the pilot oil supply device are communicated with the oil tank; and the temperature control cleaning device is communicated with the oil tank. The test oil pressure oil supply device and the pilot oil supply device of the test bench are independently arranged, and the test oil pressure oil supply device and the pilot oil supply device can control respective hydraulic oil supply pressure and flow based on actual requirements, so that the test parameters of the test bench for the multi-stage servo valve are complete, and the test result is high in accuracy. The device can be used for detecting the no-load flow characteristics, the load flow characteristics and the internal leakage characteristics of three-stage and two-stage electro-hydraulic servo valves, and a practical and efficient tool is provided for detecting the static performance of the multi-stage electro-hydraulic servo valve.