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64 results about "Speed test" patented technology
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Bearing limit rotation speed test data acquisition device
A bearing limit rotation speed test data acquisition device comprises a base for fixing a to-be-tested bearing and a main shaft penetrating through the to-be-tested bearing. The main shaft is connected with the power mechanism, and the rotating speed is controlled by the controller; a plurality of axial loading oil cylinders for applying axial loading force to an outer ring of the bearing are arranged on one side of the bearing to be measured, a temperature sensor in contact with the outer ring of the bearing is arranged on the base, and the axial loading oil cylinders are connected with a pressure sensor for measuring loading pressure; output signals of the temperature sensor and the pressure sensor are connected to the data acquisition unit; the data acquisition unit is provided with a timing unit and a storage unit used for storing the temperature value measured by the temperature sensor and the time value of the timing unit in an associated manner. The data acquisition device is used for acquiring and storing related data, so that the incidence relation between the temperature change of the bearing and the time can be conveniently obtained through related historical detection data, and the problem that the overall time consumption of the test is too long due to the fact that independent repeated tests are needed after the parameters of the bearing are adjusted each time can be solved.
Owner:HENAN UNIV OF SCI & TECH
Control method and system for automatic sealing ring production line
The invention relates to the technical field of rubber product processing control, and discloses a control method and system for a sealing ring automatic production line, and the control method for the sealing ring automatic production line comprises the steps: constructing an equipment reference resistance curve in a no-load state; the servo press is controlled to execute a micro-speed steady-state exhaust sequence, and the position locking state is maintained at the closed tail end; calculating a net rheological torque in combination with the reference curve, and extracting a contact displacement drift amount, an in-situ vulcanization rate index and a stress relaxation rate; according to the parameters, the filling stability and the rubber material rheological state are judged, and a process correction instruction is generated. According to the method, physical and chemical characteristics are accurately decoupled from servo torque signals through a micro-speed test and position locking mechanism, closed-loop control over foreign matter risks, filling quality and vulcanization degree is achieved through multi-dimensional parameters, and the problem of quality instability caused by rubber fluctuation in sealing ring production is effectively solved.
Owner:JIANGSU RUNTAIYIN TECH CO LTD
Machine tool performance test method and device, medium, program product and electronic equipment
PendingCN121696764AAutomatic control devicesMeasurement/indication equipmentsSpeed testMachine tool control
The invention discloses a machine tool performance testing method and device, a medium, a program product and electronic equipment, the machine tool performance testing method is applied to a machine tool, and the machine tool comprises a main body and a cutting part installed on the main body. The machine tool performance test method comprises the following steps: controlling a cutting piece to perform multiple cutting operations on a test original piece under the condition that a machine tool test condition is met so as to process the test original piece into a test workpiece; the cutting operation comprises the steps that the cutting part is controlled to cut the test original part based on a preset path to form a cutting hole and a step, and the step comprises side edges perpendicular to each other and side edges parallel to each other; wherein in the at least two times of cutting operation, the rotating speeds of the cutting piece are different. According to the machine tool performance testing method, the machine tool controls the cutting part to adopt different rotating speeds in at least two times of cutting operation, the limitation of a traditional constant rotating speed test is overcome, and a more real and comprehensive evaluation basis is provided for the comprehensive performance of the machine tool.
Owner:BEIJING MACHINE TOOL RESEARCH INSTITUTE
Electronic cam quintic flying shear curve generation method
The invention discloses a method for generating a five-time flying shear curve of an electronic cam, and the method comprises the steps: firstly importing a D0 parameter into an S0 pre-calculation module, and obtaining a D1 synchronous segment parameter and a D1 ascending segment parameter; if the short-period characteristic in the J0 is met, a short-period starting point dimensionless speed test and optimization module in the S1 is called, and a result is imported into a waiting-section-free flying shear curve generation module in the S4 to obtain a key point; if the J0 is not in accordance with the short-period characteristics in the J0 and the J1 is forced to have no waiting section, calling an S2 long-period no-waiting section resolving module, importing a result into an S4 no-waiting section flying shear curve generation module to obtain a key point when a solution exists, and reporting an error in S5 when the solution does not exist; and if J0 medium-short period characteristics are not met and J1 accepts a waiting section, a long-period rising section adjusting module S3 is called, and a result is imported into a waiting section flying shear curve generating module S6 to obtain a key point. According to the method, various working conditions in the five-time flying shear curve generation process are fully considered, and the optimal curve can be generated within the range set by a user.
Owner:NANJING SCIYON DRIVE TECH +1
On-speed test design method beneficial to time sequence optimization
The invention provides an in-speed test design method beneficial to time sequence optimization. The in-speed test design method comprises the following steps: S1, a chip design stage, a comprehensive stage and a test vector generation stage: a buffer is arranged in a netlist; s2, a back-end design stage: no buffer exists in a netlist output by a back end; s3, manually modifying the netlist, and adding a buffer; s4, a form verification stage: comparing that the functions of the netlist are the same before and after the addition of the buffer; s5, a test vector generation stage: inputting a netlist containing a buffer; and S6, a simulation verification stage, wherein no buffer exists in the verified netlist. By using the method, the chip can reach faster frequency; the balance of the clock network can be ensured, the structure of the clock network can be simplified, the possibility of errors is reduced, and the process is simpler; the clock path is inserted into an inverter to optimize the time sequence, and the power consumption is lower than that of an inserted buffer; the size of the chip can be reduced by deleting unnecessary buffers, and the production cost is saved; and the correctness is ensured.
Owner:INGENIC SEMICON CO LTD
A multi-point concurrent UDP bandwidth measurement method and device and storage medium
This invention relates to a multi-point concurrent UDP bandwidth measurement method, apparatus, and storage medium, applied in the field of network communication technology. It includes: concurrently connecting a client to multiple speed test servers and aggregating and calculating test data from all paths, effectively avoiding interference from momentary congestion of a single network path or load bottlenecks of a single server on the measurement results, enabling the measurement results to more realistically and stably reflect the client's local network access limit capacity; employing a two-stage rate control algorithm combining "target verification and binary search," first attempting to verify the user's expected target bandwidth. If network conditions are good, the test can be completed in one go, greatly improving efficiency; if the target is not achieved, binary search is used to quickly approach and converge to the limit bandwidth value within a fixed number of rounds. This automated detection process significantly improves testing efficiency and automation.
Owner:BEIJING TINGYU TECH CO LTD
A method and system for testing a dynamic variable speed inlet under continuous bleed conditions
The present application belongs to the technical field of test environment construction of aero-engine components, and provides a dynamic variable-speed inlet test method and system under continuous air supply and extraction conditions, the method comprising: constructing a nozzle profile, a test device nozzle inlet and outlet pressure ratio, and a speed-continuous adjustment sub-model of air supply and extraction pressure and flow balance; inputting the dynamic change requirement of the target speed with time during continuous variable-speed test under non-stop air condition into each control sub-model, combining the control law of each actuator, establishing a variable-speed control model of the nozzle profile, the test device nozzle inlet and outlet pressure ratio, the air supply and extraction pressure balance, and the test piece attitude with time, and performing continuous variable-speed flow field under the conditions of uninterrupted air supply and extraction to meet the variable-speed and time requirements. The method can perform speed-continuous dynamic change blowing test under the conditions of non-stop air and uninterrupted test device operation, and provides reliable test data support for advanced aircraft inlet design and optimization.
Owner:AECC SICHUAN GAS TURBINE RES INST
Printing slip fault diagnosis method and system based on image recognition
InactiveCN121811208ACharacter and pattern recognitionPrinting press partsClosed loop feedbackSpeed test
The invention relates to the technical field of image recognition, in particular to a printing slip fault diagnosis method and system based on image recognition. The method comprises the following steps: controlling a printer to execute a variable speed test in a no-load and impressing unit contact state, and determining a stress relaxation time constant of a rubber roller based on a theoretical linear speed and an actual surface speed of the rubber roller; collecting a printing breadth image sequence and a main shaft encoder signal, calculating a dense optical flow field of each frame of image, and executing spatial statistical pooling processing on the dense optical flow field to obtain a one-dimensional visual speed signal; and calculating an accumulated phase containing rubber roller lag compensation by utilizing the stress relaxation time constant, and obtaining a phase domain speed signal by utilizing the accumulated phase and the one-dimensional visual speed signal, so as to carry out grading diagnosis and closed-loop feedback control on the printing machine by utilizing the phase domain speed signal. According to the technical scheme, slippage fault diagnosis can be carried out on the printing machine.
Owner:WEINAN DADONG PRINTING PACKING MASCH CO LTD
Network device using network processing unit and hardware acceleration circuit to meet speed test requirements of high-speed network and associated network speed test method
A network device includes a storage device, a central processing unit (CPU), a hardware acceleration circuit, and a network processing unit (NPU). The storage device stores program codes. The CPU loads and executes the program codes to deal with a control function of a network speed test. The hardware acceleration circuit provides hardware-accelerated packet forwarding. The NPU interacts with the control function performed by the CPU, and deals with processing of data packets used for the network speed test. Transmission of the data packets between the network device and another network device is performed through the NPU and the hardware acceleration circuit, without intervention of the CPU.
Owner:AIROHA TECH (SUZHOU) LTD
Test platform for reducing system back pressure during high-speed test of gearbox pump
The utility model discloses a test platform for reducing system backpressure during high-speed test of a gearbox pump. The test platform comprises a main loop system. The main loop comprises a first hydraulic set, a servo valve set and a flow dividing control module, and the first hydraulic set serves as a hydraulic power source and a preliminary pressure control part of the test platform and is formed by sequentially connecting a pump, an overflow valve, a filter element and a flow component. The pump provides required hydraulic energy for the whole test platform, the overflow valve follows the pump and adjusts and limits the maximum pressure of the system, the filter element filters hydraulic oil, impurities and pollutants are removed, oil is kept clean, system abrasion is reduced, the service life of a hydraulic element is prolonged, and test accuracy is ensured. And the flow part controls and adjusts the flow of the hydraulic oil according to test requirements. The servo valve group is arranged at the liquid outlet end of the filter element and comprises two servo valves which are connected in parallel, and an oil path of one servo valve is connected with an electromagnetic valve in parallel.
Owner:ZF STEERING JINCHENG NANJING
Sealing ring springback speed testing device and method
Owner:NANJING UNIV OF SCI & TECH
Wearable leg muscle contraction velocity tester
This invention relates to the field of motion detection equipment technology, and discloses a wearable leg muscle bundle contraction speed tester, including a pant body and a detection structure fixedly mounted on the pant body. The detection structure includes multiple speed measurement modules arranged longitudinally along the pant body. Each speed measurement module is connected to a lower fixator via test wires, and the lower fixator is fixedly mounted on the lower leg of the pant body. This invention, by arranging multiple speed measurement modules longitudinally along the pant body, utilizes a spring-loaded contraction unit to drive an amplifying gear set to amplify the minute displacements generated by leg muscle bundle contractions. Speed data is collected in real time by a speed sensor and wirelessly transmitted to a display via a transceiver. This achieves direct, real-time, and accurate measurement of muscle bundle contraction speed during natural walking, without the need for large equipment or site limitations. It effectively solves the technical problems of traditional isokinetic testing, which can only indirectly measure force, involves only a single movement, and suffers from long data processing cycles and lack of real-time feedback in simulation technology.
Owner:CHANGSHA HEALTH VOCATIONAL COLLEGE
Fixing device for guide plate loading test
ActiveCN224169607UQuick installation and fixingImprove stabilityWork holdersCar manufacturingSpeed test
The utility model discloses a fixing device for a guide plate loading test, which belongs to the technical field of automobile manufacturing equipment and comprises a bottom frame, a mounting frame is fixedly connected to the top of the bottom frame, a plurality of fastening mechanisms I and fastening mechanisms II are arranged on the edge of one side of the mounting frame, and the fastening mechanisms I and the fastening mechanisms II are fixedly connected with the mounting frame. A plurality of third fastening mechanisms and a plurality of fourth fastening mechanisms are arranged on the edge of the other side of the mounting frame, the first fastening mechanisms and the second fastening mechanisms can be matched with the supporting seats to fix workpieces with the inner sides facing outwards, and the third fastening mechanisms and the fourth fastening mechanisms can be matched with the supporting seats to fix workpieces with the outer sides facing outwards. The guide plates of different models can be rapidly installed and fixed, the overall fixing stability is improved, and the problems that a traditional bolt fastening type installation mode is complex in operation and poor in adaptability, and a sliding rail structure is prone to displacement due to vibration in a high-speed test, so that test data are distorted are solved.
Owner:QINGDAO LINDA TECH DEV CO LTD
A high-speed test bench capable of automatic adjustment
The utility model discloses a kind of automatically adjustable high-speed test bed, wherein including frame body, the top of the frame body is fixedly connected with driving motor, the output shaft of driving motor is fixedly connected with driving shaft through shaft coupling, one end of the driving shaft is fixedly connected with driving gear, the outer wall of the driving gear is engagedly connected with driven gear, the inner wall of the driven gear is fixedly connected with first screw rod, the outer wall of the first screw rod is movably connected with first nut, the outer wall of the first nut is fixedly connected with movable frame, the device is provided with frame body, driving motor, driving shaft, driving gear, driven gear, first screw rod, first nut, movable frame, electric push rod, support block, second screw rod, second nut, mounting bracket, cylindrical gear and fixed rack, the function of automatic adjustment is realized, so as to be conducive to the installation of different size products, and then the application range is improved.
Owner:NANCHANGSHI ELECTROMECHANICAL EQUIP CO LTD
Non-contact high-speed test method for pipe vibration test section load
The present application provides a kind of pipeline vibration test section load non-contact high-speed test method, belong to measurement testing field, including the following steps: first step: test system setup;Second step: test image acquisition;Third step: deformation field calculation;Fourth step: reflection transformation calculation;Fifth step: pipeline full circumferential surface morphology reconstruction;Sixth step: deformation field measurement;From the three-dimensional point cloud of initial state in the three-dimensional point cloud of deformation state, obtain the three-dimensional displacement field of each deformation state, further calculate three-dimensional displacement field, obtain the required strain field;Seventh step: pipeline section stiffness coefficient calibration;Eighth step: based on single system multi-view pipeline full circumferential deformation test method, the deformation information under pipeline section load is collected, and section load data is calculated according to section stiffness coefficient data and strain data, complete test.The present application solves the problem of low test reliability and measurement accuracy caused by the quality of sensor and wire itself in the prior art.
Owner:BEIJING INST OF STRUCTURE & ENVIRONMENT ENG
Robot testing method and testing apparatus thereof
The application provides a robot testing method and testing equipment, which can save testing cost. The testing method comprises the following steps: when the first sensor and the second sensor both sense the robot, the conveyor belt is controlled to start and gradually accelerate, wherein, during the gradual acceleration, when the second sensor and the third sensor both do not sense the robot, the conveyor belt is controlled to accelerate to a standard speed and run in a direction opposite to the walking direction of the robot; within the first set time of the running of the conveyor belt at the standard speed, if the second sensor and the third sensor both do not sense the robot, it is determined that the walking speed test of the robot is qualified, if the second sensor senses the robot, it is determined that the rated walking speed of the robot is slower, and if the third sensor senses the robot, it is determined that the rated walking speed of the robot is faster.
Owner:SHANGHAI ZHONGJIAN ZHIKR INTELLIGENT TECHNOLOGY CO LTD
Automobile bumper lateral pressure simulation simplified analysis method and device
The application relates to the technical field of automobiles, in particular to a simulation simplified analysis method and device for lateral pressure of an automobile bumper, which comprises the following steps: when a target vehicle is in a low-temperature and low-speed test working condition, a target bumper body is intercepted to a target length, and a vehicle simulation simplified analysis model is built according to the bumper body and material properties thereof; a first target stress interval of the bumper body and at least one lateral connecting bolt is determined through the model, the first target stress interval is compared with a second target stress interval obtained from a preset whole-vehicle simulation analysis model, and stress and deformation results of the bumper body and the lateral connecting bolt are output according to a comparison result. Therefore, the problems that in the related art, the research scene and analysis dimension of bumper stress are obviously limited, the actual guiding value of stress analysis results for engineering design is reduced, and the demand of bumper multi-working-condition structure design and safety checking cannot be met are solved.
Owner:CHINA FAW CO LTD
Robot testing method and testing equipment thereof
The invention provides a robot testing method and testing equipment thereof, which can save the testing cost. The testing method comprises the steps that under the condition that both the first sensor and the second sensor sense the robot, the conveyor belt is controlled to be started and gradually accelerated, and in the gradual acceleration process, when both the second sensor and the third sensor do not sense the robot, the conveyor belt is controlled to be started and gradually accelerated; the conveying belt is controlled to accelerate to the standard speed to run, and the running direction of the conveying belt is opposite to the walking direction of the robot; within the first set time when the conveyor belt runs at the standard speed, if neither the second sensor nor the third sensor senses the robot, it is judged that the walking speed of the robot is tested to be qualified, and if the second sensor senses the robot, it is judged that the rated walking speed of the robot is low; if the third sensor senses the robot, it is judged that the rated walking speed of the robot is high.
Owner:SHANGHAI ZHONGJIAN ZHIKR INTELLIGENT TECHNOLOGY CO LTD
Motor speed estimation methods, devices, motor control methods and systems
PendingCN122092751AGuaranteed real-timeImprove real-time performanceElectric motor controlConverting sensor outputMotor speedControl system
This invention discloses a motor speed estimation method, apparatus, motor control method, and system based on Koopman operator error compensation. The method includes: calculating two speed test values using backward differential and center differential methods respectively based on the rotor position signal acquired by the motor encoder; calculating the difference between the two speed test values as the speed error value at the previous time step k-1; constructing a prediction input; predicting the speed error based on the Koopman operator K and the prediction input to obtain a predicted error value; calculating the motor speed prediction value based on the predicted error value and the speed test value; and updating the Koopman operator at the next time step. Compared with existing technologies, this invention has strong engineering adaptability, is suitable for high-dynamic motor control systems, and has high detection accuracy.
Owner:JIANGSU STARING TECHNOLOGY CO LTD
Speed simulation device for calibrating speed test module
ActiveCN224190052USimple structureeasy to operateTesting/calibration of speed/acceleration/shock measurement devicesAnalogue computationDynamic monitoring
The utility model discloses a speed simulation device for calibration of a speed test module, and relates to the technical field of photoelectric measurement. The rotary driving part is assembled at the top end of the mounting bracket; the rotation simulation part is assembled on an output shaft of the rotation driving part, the rotation driving part drives the rotation simulation part to rotate, and the instantaneous speed of train equipment monitored by pantograph dynamic monitoring equipment when the train equipment passes is simulated; the adjusting guide rail is assembled on the mounting bracket; and the measuring piece is assembled on the adjusting guide rail in a sliding manner and is used for measuring the number of times and interval time when the rotating simulation piece passes through in a rotating manner with different distance measuring radiuses. The rotation driving part drives the rotation simulation part to rotate, the instantaneous speed monitored by the pantograph dynamic monitoring equipment when train equipment passes is simulated, and compared with the speed change simulated by a horizontal movement mechanism, the motion range of the device is not limited, large impact cannot be generated, the target operation speed is constant, and the simulation calculation speed is more accurate.
Owner:CHINA ACADEMY OF RAILWAY SCI CORP LTD +2
A Servo Safety Function Testing Method and System
This application relates to a servo safety function testing method and system. The method includes: obtaining a target test mode corresponding to the servo under test from safety function test modes; wherein, the safety function test modes include a safety torque cancellation test mode, a safety stop test mode, a safety limit speed test mode, a safety direction test mode, and a safety speed monitoring test mode; determining the test rules corresponding to the target test mode; testing the servo under test according to the test rules and obtaining the corresponding test data; and determining the safety performance of the servo under test in the target test mode based on the test data. This solves the problem that too many interference factors during manual data recording lead to low accuracy of test data, which in turn reduces the accuracy of safety test results.
Owner:INSTR TECH & ECONOMY INST P R CHINA
Calibration method of GNSS speed test equipment based on calibration auxiliary vehicle
PendingCN121679629ASatellite radio beaconingTesting/calibration of speed/acceleration/shock measurement devicesSpeed testNavigation system
The invention relates to the technical field of equipment calibration, and provides a calibration method of GNSS speed test equipment based on a calibration auxiliary vehicle. The calibration auxiliary vehicle comprises a vehicle main body and a speed testing device, and the speed testing device and the GNSS speed testing equipment to be calibrated are respectively mounted on the vehicle main body; the method comprises the steps that a vehicle body is controlled to run based on a preset working condition, and the preset working condition is used for describing the running state of the vehicle body; for the driving process of the vehicle main body, acquiring first speed data recorded by the to-be-calibrated GNSS speed test equipment and second speed data recorded by the speed test device; and calibrating the to-be-calibrated GNSS speed test equipment according to the first speed data and the second speed data. Through the method, the calibration precision of the GNSS speed test equipment can be effectively improved, and support is provided for vehicle performance evaluation, road safety and navigation system reliability.
Owner:RES INST OF HIGHWAY MINIST OF TRANSPORT +1
Rotational speed testing tool for medical power handle
The utility model provides a kind of rotational speed test tool of medical power handle, including support seat, the inside of support seat is equipped with installation cavity;Transmission shaft, the transmission shaft is rotatably installed on support seat, and pass through the installation cavity, one end of the transmission shaft has the connecting portion for accessing medical power handle;Magnetic piece, it is set on the transmission shaft, and located in the installation cavity;Hall plate, the hall plate is installed on the support seat, and at least part is located in the installation cavity, at least one hall sensor is equipped on the hall plate, the hall sensor is inlaid in the installation cavity, and located on the outside of the magnetic piece.The utility model can solve the technical problem that prior art cannot satisfy the accurate, direct measurement of rotational speed under high rotational speed.
Owner:CHONGQING XISHAN SCI & TECH
Automobile speed test bench
The utility model provides an automobile speed test bench, which comprises a bench main body, a lifting mechanism is arranged in the bench main body, one end of the lifting mechanism is connected with a lifting plate, and one end of the lifting mechanism is connected with a driving piece; limiting grooves used for positioning automobile wheels are formed in the positions, located on the two sides of the lifting plate, in the rack body. And a brake speed measurement mechanism is arranged in the rack main body corresponding to the position of the limiting part. According to the test bench, the limiting grooves are formed in the bench body, positioning points of the parking position of an automobile on the bench body are provided for a driver through the limiting grooves, when the automobile is driven to the position above the bench body, only wheels of the automobile need to be located in the middle of the limiting grooves in the two sides of the lifting plate, and positioning and speed measuring work can be rapidly carried out; a driver does not need to frequently move the position, and the detection efficiency of the automobile is improved.
Owner:CHERY NEW ENERGY AUTOMOBILE TECH CO LTD
Lead screw durability testing mechanism
The utility model discloses a lead screw durability testing mechanism which comprises a base, a detection mechanism arranged on the base and a transmission mechanism arranged on the base. The transmission mechanism comprises a transmission base and a transmission assembly arranged on the transmission base. The transmission base is arranged on the base, a plurality of clamping pieces are arranged on the side face of the transmission base, and the clamping pieces are used for fixing the transmission base; the detection mechanism comprises a fixing assembly and a detection assembly arranged on one side of the fixing assembly. The detection assembly and the fixing assembly are located on the same axis. The detection assembly is used for pressing and detecting the to-be-detected product; the base comprises a base body; the stability and the durability of the product in a high-speed running state are further tested through a high-rotating-speed test driven by the transmission motor, and the comprehensiveness and the accuracy of performance evaluation of the product in an extreme working environment are ensured.
Owner:SUZHOU LISOTE AUTOMATION EQUIP CO LTD
Tracked vehicle dynamometer
The invention relates to a crawler-type vehicle dynamometer, and belongs to the technical field of dynamometer equipment. The deck assembly and the track assembly are combined to form a special dynamometer structure special for the track vehicle, the dynamic real-time monitoring system and the static calibration system are matched, on-line calibration and data closed-loop verification in the testing process are achieved, the problem of data uncertainty is consolidated through static calibration, and the dynamic real-time monitoring system and the static calibration system are matched with each other. And the accuracy of a test result is obviously improved. Secondly, a distributed electric inertia simulation technology for simulating and predicting equipment by adopting a simulation tracked vehicle can accurately reproduce complex dynamic characteristics of the tracked vehicle, and overcomes the limitation of mechanical inertia simulation on corresponding speed and precision. Besides, the motor of the power output assembly is loaded through the simulation crawler, the torque, rotating speed and speed test range of the system is widened, the test requirements of the wide constant power area of the motor of the crawler can be better matched, and the authenticity and coverage range of working condition simulation are enhanced.
Owner:BEP (CHINA) TESTING EQUIP CO LTD
Gear box performance testing equipment
The invention discloses gear box performance testing equipment, which comprises a supporting platform and a gear box body, a detection limiting support capable of being sleeved and limited with the gear box body is mounted in the middle of the supporting platform, and a moving platform and a magnetic powder brake are respectively arranged on two sides of the supporting platform. The moving platform is provided with a motor mechanism which can be in transmission connection with the transmission end on one side of the gearbox body, and the magnetic powder brake is provided with a dynamic torque sensor which can be in transmission connection with the transmission end on the other side of the gearbox body. According to the gearbox performance test equipment, a transmission device is composed of the mobile platform, the motor mechanism, the dynamic torque sensor and the magnetic powder brake, and the gearbox body can be driven to carry out a plurality of automatic detection items such as torque and rotating speed test, efficiency test and bearing capacity test under the support of the supporting platform and the detection limiting support; and the detection efficiency of the gearbox body is ensured.
Owner:CHANGZHOU YUBAO TRANSMISSION TECHNOLOGY CO LTD
Volume speed-following test method and device for vehicle-mounted sound equipment and new energy automobile
The invention provides a method and device for testing the volume of a vehicle-mounted sound system along with the speed, a new energy automobile and electronic equipment, and the method comprises the steps: reading a sound system software version corresponding to the automobile; obtaining preset data corresponding to the sound equipment software version; performing safety detection on the vehicle, and executing a preset test script when the vehicle is in a safe state; according to the test script, carrying out a volume speed-following adjustment test on the vehicle to obtain test data; and comparing the test data with the preset data to obtain a test result. By implementing the method and the device, automatic and sustainable volume speed-following test can be realized, manual detection is not needed, the test consistency is high, the efficiency is higher, multiple accurate tests can be realized, and more data support is provided for adjustment of the vehicle-mounted sound system.
Owner:CHINA FAW CO LTD
Motor test accompanying device and motor test system
The utility model belongs to the technical field of permanent magnet system auxiliary test equipment, and discloses a motor test accompanying device and a motor test system. The device comprises an accompanying test box body and a transmission mechanism. The transmission mechanism is arranged in the accompanying test box body, and the accompanying test box body is used for protecting the transmission mechanism; the transmission mechanism comprises an output end and a plurality of input ends, the output end is connected to the dynamometer, each input end is in transmission connection with the output end, and the plurality of input ends have different rotating speeds so as to be used for installing a plurality of test motors with different rotating speeds; according to the motor test accompanying device, loading tests of various test motors with different rotating speeds can be met through one motor test accompanying device, the application range of the motor test accompanying device is widened, the number of accompanying devices used for testing the test motors is reduced, the test cost is reduced, resource waste is avoided, and meanwhile the test efficiency is improved.
Owner:NANJING HIGH SPEED & ACCURATE GEAR GRP
Speed measurement method and device, computer device and storage medium
The application relates to a speed measurement method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring a first four-fold pulse count and a second four-fold pulse count corresponding to an original pulse signal of an encoder, wherein the pulse count difference between the first four-fold pulse count and the second four-fold pulse count is an integer multiple of 2; determining a first pulse edge capture time corresponding to the first four-fold pulse count and a second pulse edge capture time corresponding to the second four-fold pulse count; and obtaining a target speed of the motion equipment based on the first four-fold pulse count, the second four-fold pulse count, the first pulse edge capture time and the second pulse edge capture time. The application can effectively avoid periodic speed fluctuations caused by uneven pulse distribution, and can effectively improve the accuracy and efficiency of speed testing without increasing a low-pass filter or switching to a two-fold mode.
Owner:SHENZHEN WEICHUANG SOFTWARE CO LTD