274 results about "Precision testing" patented technology

The invention relates to the technical field of welding deformation control, and discloses a multi-stage adjusting method and system for steel structure welding deformation control. The method comprises the steps that steel member parameters are measured, a welding deformation prediction model is established, and pre-deformation data are obtained; performing accurate pre-deformation processing according to the data; executing segmented welding and recording a temperature field and a deformation amount; performing local heat treatment on the high-stress area to obtain stress distribution; correcting a deformation area by using multi-point force; and performing precision detection and quality evaluation according to the corrected data to form a control file. According to the method, high-precision control over welding deformation of the complex steel structure is achieved through data transmission and feedback adjustment of all stages.

The invention discloses a Y-axis knife rest reliability test bed with hybrid loading and precision testing integrated and a test method, and belongs to the technical field of reliability testing of key components of numerical control machine tools. The test bench comprises a test bench base, an automatic rotary table, a torque loading device, a loading device base, a dynamic force loading device, an analog loading rod, a Y-axis positioning precision testing device, a tested Y-axis tool rest, a transposition precision testing device and a console. A tool rest bottom plate of the test bench base is controlled by a console to move left and right and up and down, and a tested Y-axis tool rest is installed on the tool rest bottom plate. The automatic turntable comprises a turntable driven by a motor; the torque loading device comprises a generator fixed on the rotary table, and the output end of the generator is fixedly connected with a magnetic gear; the analog loading rod comprises a vertical shaft and a horizontal shaft which are in vertical transmission; the lower end of the vertical shaft is in electromagnetic induction non-contact connection with the magnetic gear; the tail end of the horizontal shaft is connected with the output end of the tested Y-axis tool rest. And the dynamic force loading device can apply a load to the analog loading rod shell.

The invention discloses a device and a method for testing rigidity, precision and performance retentivity of an electric linear actuator, and belongs to the technical field of equipment testing. The device comprises a supporting module, a force loading module, a measuring module and a control module. The supporting module is used for fixing the to-be-tested electric linear actuator and the force loading module; the force loading module is provided with a servo electric cylinder and is used for being connected with a to-be-tested electric linear actuator, the control module is used for controlling the to-be-tested electric linear actuator and the force loading module to move, and the measuring module is used for collecting data; the testing method comprises an electric linear actuator rigidity testing method, an electric linear actuator precision testing method and an electric linear actuator performance retentivity testing method, by means of the testing device and the testing method, the rigidity, the precision and the performance retentivity of the electric linear actuator can be detected through one-time clamping, and the testing device and the testing method have the advantages of being high in precision and real degree.

The invention relates to the technical field of semiconductor manufacturing, and discloses an integrated vacuum system test method of a mechanical arm and a vacuum test platform. A vacuum test platform which is provided with a two-stage vacuum system and a multi-channel proportional valve and is designed in a modular architecture mode is adopted for sequentially carrying out pre-installation calibration, vacuum environment simulation, positioning precision testing, vacuum adaptability testing and durability testing. The vacuum test platform is provided with a fine tuning clamping groove which is matched with the altimeter to ensure that the mounting position of the mechanical arm to be tested is accurate and the actual condition of the photoetching machine is reetched; a plurality of general standardized interfaces are also arranged, so that quick switching of to-be-tested mechanical arms of different models is realized; in the analysis stage, the three test results are analyzed, whether the performance of the mechanical arm to be tested reaches the standard or not is evaluated, the capability of integrally testing indexes such as positioning precision, vacuum adaptability and durability is achieved, external pre-debugging of the mechanical arm under the working environment of the simulated photoetching machine is achieved, and the debugging efficiency and precision are improved.

The invention relates to a high / low temperature wear-corrosion coupling damage test device and a quantitative evaluation method, and belongs to the technical field of wear corrosion test and material failure analysis. The device comprises a temperature-controllable corrosion test tank, a friction-wear test machine, an electrochemical workstation and a high-low temperature external circulation temperature controller, the temperature-controllable corrosion test tank is arranged on the friction-wear test machine, and friction-wear performance testing is achieved through reciprocating motion of the friction-wear test machine. And the temperature-controllable corrosion test tank is externally connected with an electrochemical workstation and a high-low temperature external circulation temperature controller and is used for testing corrosion performance and controlling temperature. According to the invention, high-precision testing and quantitative analysis of abrasion and corrosion of the metal-based material in high and low temperature environments are realized.

The invention provides a humanoid robot motion test platform, which comprises a base, a belt-type motion mechanism, a height adjusting device and a control system, and is characterized in that the height adjusting device comprises a linear driving mechanism of which the bottom is hinged to the base; the first sliding mechanism is connected with the output end of the linear driving mechanism; the second sliding mechanism is in sliding fit with the first sliding mechanism and is connected with the test platform; and the brake mechanism is used for limiting relative movement of the two. During slope changing, the two sliding mechanisms slide relatively to automatically compensate the space horizontal displacement difference, and lateral stress interference is eliminated; the high-frequency large-load stepping impact of the robot can be effectively resisted, the step loss of the system is prevented, and the unification of smooth slope change and high-rigidity and high-precision testing is realized.

The invention relates to the technical field of sensor precision testing, in particular to a motorcycle shock absorber built-in position sensor precision testing method, which comprises the following steps: acquiring position data of a motorcycle shock absorber built-in position sensor, shock acceleration of a shock absorber and moving speed of the shock absorber under different working conditions; acquiring a three-dimensional feature vector corresponding to each working condition, performing clustering division on all the three-dimensional feature vectors, calculating a comprehensive interference feature value of each category after clustering so as to divide each category into a large interference set and a small interference set, and optimizing a covariance matrix of position data corresponding to the large interference set and the small interference set during Kalman filtering; and testing the precision of the built-in position sensor of the motorcycle shock absorber based on the error between the filtered position data and the preset standard displacement data of the linear motor. The accuracy of the precision test of the built-in position sensor of the motorcycle shock absorber can be improved.

The invention relates to the technical field of steel linings, in particular to a high-precision assembly type steel structure installation effect detection device, which comprises a hoisting component, a winding component, a cable, a balance component, an adjusting arm and a detection component, and is characterized in that one side of the hoisting component is provided with a steel lining assembly body, and the balance component comprises a conical balance block; a mounting rod is arranged on the upper side of the conical balance block, a transmission groove is formed in the upper side of the conical balance block, and the adjusting arm comprises a first adjusting rod. The detection component is hoisted to the inner side of the steel lining through the hoisting component, the winding component and the cable for detection operation, the detection precision is improved, the position of the detection component is automatically adjusted through rotation of the adjusting arm at the upper end of the balance component, the steel lining can be detected in all directions, and the detection efficiency is improved. The height of the detection position is adjusted by winding and unwinding the detection component through the winding component, the automation degree is high, and the detection efficiency is improved.

The invention relates to a rate gyroscope temperature modeling test device and a test method, and relates to the technical field of rate gyroscope test.The device comprises a high-low temperature test box, a rotary table module and a measurement and control module, the high-low temperature test box provides a-50 DEG C to 200 DEG C wide temperature environment, the rotary table module exerts an accurate rotating speed, and the measurement and control module is connected with the high-low temperature test box; the measurement and control module realizes automatic temperature control, rotating speed control and multi-parameter synchronous acquisition. A hollow rotating shaft and a titanium alloy heat insulation coupling are adopted to isolate heat conduction, and a 24-bit AD acquisition card is combined to obtain an output signal of the gyroscope. The method comprises the steps of multi-temperature-point heat preservation, positive and negative rotating speed testing and data acquisition, construction of a temperature-angular speed-output three-dimensional model, and fitting of a nonlinear compensation formula through a least square method. According to the invention, automatic high-precision testing in a wide temperature range is realized, the scale factor precision and the zero-bias stability of the gyroscope in a high-temperature environment are remarkably improved, and the method is suitable for high-temperature application scenes such as geological exploration and petroleum drilling.

The present application relates to the medical robot control and precision testing technical field, especially related to a kind of kinematics parameter closed-loop calibration method and device of surgical robot end effector.The method is first set up reflection unit on surgical robot end effector, and the motion data of driving unit and the light spot position data detected by photoelectric detection unit are collected;Control surgical robot end effector executes rotary scanning movement to carry out coordinate correction to light spot position data;Each independent motion axis of surgical robot end effector is driven respectively, and according to the mapping relationship of corrected light spot position data and motion data, the transmission parameter and hysteresis parameter of each independent motion axis are identified;Drive the motion axis with coupling relationship, identify inter-axis coupling coefficient, and configure kinematics calibration model to control system.The present application effectively eliminates steel wire transmission coupling and system geometric error through step-by-step optical feedback and geometric self-calibration, and improves the operation precision of end effector.

The utility model discloses a kind of test devices, belong to switching power supply technical field, specifically related to a kind of switching power supply high-precision test device, comprising: signal acquisition module, signal conditioning module, AD conversion module and control module;The utility model processes the voltage signal and current signal of acquisition by signal conditioning module, to further guarantee the accuracy of each acquisition signal, and can inhibit the generation of noise and error, while signal conditioning module in the signal of incoming acquisition is handled, measured signal is converted into digitalizable voltage signal, and according to different signal passage gear attenuation amplitude, gain is carried out respectively by program-controlled gain circuit, finally the component of aliasing frequency in the level signal of output is filtered out by anti-aliasing filter circuit, eliminate aliasing in band and prevent dynamic performance reduction;So the utility model can carry out high-precision monitoring according to different signals, to guarantee the stability and accuracy of test device work.

The invention discloses a high-speed heavy-load working condition bearing dynamic stiffness testing device and testing method, and relates to the field of bearing testing. The invention solves the problems that the existing bearing dynamic stiffness test technology and equipment only can load in a single direction, cannot simulate axial and radial composite loading, depends on contact transmission, is insufficient in heavy load bearing, lacks system vibration error suppression measures, and is poor in reliability. And the high-precision test requirement of the independent rolling bearing under the high-speed heavy-load composite working condition is difficult to meet. A shafting supporting module is arranged on the upper portion of a test bench support, a measuring module is located over the shafting supporting module, an axial loading module and a radial loading module apply axial force and radial force to a tested bearing respectively, and a driving module drives a supporting shaft and an inner ring of the tested bearing to rotate. Axial and radial composite loading under the high-speed heavy-load working condition can be achieved, axial and radial displacement can be monitored synchronously, system errors are reduced, and high-precision measurement of the dynamic stiffness of the bearing is achieved.

The invention discloses a test adjusting device for a packer in the technical field of petroleum pipelines, and the test adjusting device comprises a bottom water tank, supporting columns are arranged at the tops of the two sides of the bottom water tank, the tops of the two supporting columns are fixedly connected with top supporting frames, and the ends, close to each other, of the two top supporting frames are jointly and fixedly connected with a supporting fixing ring. Liquid in the top liquid storage tank is precisely pressurized through the pressurizer, the pressure environment of the packer under the actual working condition is simulated, and high-precision testing of the performance of the packer is achieved in cooperation with the pressurization cavity pressure meter and the pipeline pressure meter. The device adopts a modular design, and all parts are connected through flanges, so that the device is convenient to disassemble and assemble. In the testing process, testing adjustment of the packer can be completed only by operating according to the preset steps, and the working efficiency is greatly improved. The device is provided with a display, can display key parameters such as pressure of a booster cavity, pressure of a pipeline, liquid level and the like in real time, and is convenient for operators to monitor and adjust the testing process.

The invention is suitable for the technical field of testing, and provides a precision testing system, and a main control device is used for controlling a first subject matter to move according to a test point set through a motion platform, and obtaining a three-dimensional test coordinate when the first subject matter moves to the test point set, and controlling the surgical robot to move according to a benchmark test coordinate obtained by converting the three-dimensional test coordinate to obtain a three-dimensional actual coordinate, and determining the system precision of the surgical robot according to an error between the three-dimensional test coordinate and the three-dimensional actual coordinate. A full-automatic process from subject matter entering / placing and subject matter moving to surgical robot precision measurement can be achieved, human errors are prevented from being introduced in precision testing, the testing efficiency is improved through full-process automatic testing, and by flexibly configuring a testing point set and improving the testing sample size, the accuracy of the surgical robot is improved. The system precision performance of the surgical robot at multiple positions in the whole working space can be tested, and the accuracy of precision testing is improved.

The invention discloses a scouring sonar precision testing device and method in a sand-rich water flow environment, and belongs to the technical field of pier scouring monitoring, the testing device comprises a water tank body, the water tank body is internally filled with water and accommodates a riverbed sand layer and an underwater distance measurement sonar, and the riverbed sand layer is laid at the bottom of the water tank body; a circulating water flow pipeline is connected between the water tank water inlet and the water tank water outlet; a water pump, a flow regulating valve and a sand adding opening are arranged on the circulating water flow pipeline; an underwater ranging sonar to be tested is mounted at the top of the water tank body through a vertical mounting rod, and the vertical mounting rod drives the underwater ranging sonar to perform height adjustment, so that an acoustic window of the underwater ranging sonar is located at a predetermined water depth position; at least one side tank wall of the water tank body is transparent and is used for observing the flow state in the water tank body and the river bed scouring form, and scale marks are arranged on the transparent tank wall and are used for reading the actual heights of the water surface and the surface of a river bed sand layer. The testing device is simple and compact in structure and can provide calibration basis for engineering application.

The present invention provides an SMA wire material evaluation system and method that simulates real-world application scenarios. This system utilizes a modular load-bearing structure, integrated with an environmental simulation cabin, a data acquisition module, and a control center. A dynamic constraint calculation unit analyzes wire material factory parameters and automatically sets load, temperature rise, and strain thresholds. An interlocking protection unit monitors load, temperature, and strain data in real time. When thresholds are exceeded, a load-temperature coordinated protection mechanism is triggered, simultaneously reducing the load and adjusting the heating power. A closed-loop control unit dynamically adjusts parameters based on stress relaxation characteristics and safety factor mapping tables stored in an adaptive database to ensure that the wire material's residual plastic strain is ≤0.1% and that the microstructure is free of phase transition defects during testing. This system significantly reduces testing equipment costs. Through dynamic threshold constraints and multi-parameter coordinated protection, it achieves high-precision testing while effectively avoiding damage to the wire material's performance, achieving both high efficiency and industrial practicality.

The present application relates to the technical fields of experimental fluid mechanics and precision testing instrument, and discloses a kind of fluid resistance precision test system and method in confined space, including thermostatic container component, including coaxial setting inner measuring tube and outer sheath pipe, outer sheath pipe bottom is fixed in positioning hoop.This application uses double-layer coaxial sleeve pipe to match bottom positioning hoop structure, constructs thermostatic cavity with mechanical centering datum as one and coaxial, guarantee the absolute perpendicularity of long-stroke measurement, with the help of dynamic pressure suspension guiding unit and double-line parallel traction mechanism, realize center guiding wire and traction component physical isolation, eliminate cable winding and friction noise, simultaneously through top detachable positioning support and the spiral quick-release hook cooperation of dynamic pressure suspension guiding unit, without cutting heavy binding traction line, can quickly replace test sphere under the premise of reserving system centering datum, so as to greatly improve the efficiency of multi-working condition comparison experiment.

The utility model relates to the field of precision test probes, and discloses a precision test probe for a spherical surface, which comprises a rod sleeve and a probe rod, the top end of the rod sleeve is provided with an upper port, the bottom end of the rod sleeve is provided with a lower port, the upper port and the lower port penetrate through the rod sleeve, the bottom end of the probe rod is provided with a probe head, and the probe head is connected with the rod sleeve. And the central point and four corners of the needle head are pointed cones and form five groups of contacts. According to the precision test probe for the spherical surface, the probe rod, the probe head and the contacts are arranged, the center point and the four corners of the probe head are each of a pointed cone structure, five sets of independent contacts are formed, when the probe is in contact with the spherical metal surface, the five sets of contacts can be flexibly attached according to changes of the radian of the spherical surface, and even if the spherical surface is slightly irregular, the contact points can not be damaged. And at least three groups of contacts can be ensured to form an effective circuit path, so that the contact stability of the spherical metal product is enhanced, the slippage phenomenon possibly caused by pressure change in plane contact is avoided, and the problem of inaccuracy of test data caused by insufficient contact points is solved.

This invention discloses a precision testing device for planetary roller screw pairs, including a testing platform with symmetrically mounted fixed plates on its top. A servo motor is fixedly mounted on one side of one of the fixed plates. The device also includes two sets of support rods symmetrically mounted below the two fixed plates, and a positioning assembly positioned between the two fixed plates. The positioning assembly includes two movable frames and limiting components symmetrically positioned on both sides of the two movable frames. This allows for easy switching between different sized positioning plates when dealing with different types of planetary roller screw pairs, facilitating reliable positioning of the nut or screw according to the type of planetary roller screw pair. Furthermore, after switching, when positioning a reverse planetary roller screw pair, multi-point positioning of the screw in the pair can be quickly achieved, facilitating the movement of the screw in the reverse planetary roller screw pair while preventing rotation during screw movement, thus improving testing accuracy.

The utility model relates to the technical field of mobile phone screen assembly FPC reverse folding precision testing, and discloses a pressure device for mobile phone screen assembly FPC reverse folding precision testing, which comprises a bottom plate, two baffle plates are fixedly welded on the outer walls of four first springs, a top plate is fixedly welded on the outer wall of the baffle plate, a moving rod is slidably connected in the top plate, and the moving rod is fixedly welded on the bottom plate. A plurality of second springs are fixedly mounted on the outer wall of the bottom of the top plate, and triangular plates are fixedly welded to the bottoms of the second springs. An EPC board is placed between a clamping plate and a pressing plate, a movable disc is rotated to drive a threaded rod to rotate, the pressing plate is driven to move towards the clamping plate, the EPC board is clamped, a movable rod is moved downwards to drive a triangular plate to move downwards, the triangular plate can be attached to baffles, the EPC board is placed between the two baffles, the movable rod is loosened, the triangular plate is driven to move upwards, and the baffles are driven to be clamped. The effect of clamping the EPC board is achieved, and the effect of conveniently fixing the EPC board is achieved.

This invention discloses a sample loading fixture for stress testing, relating to the field of stress testing technology. The invention includes a base plate with several support components mounted on its bottom surface. A slide rail mechanism is fixed to the top of the base plate, and a support assembly and a testing assembly are connected to the top of the slide rail mechanism. The support assembly and the testing assembly are interconnected. A positioning seat is mounted at one end of the top surface of the base plate. A positioning component is provided on one side of the support assembly, and a pressure plate mechanism is provided on the other side. An adjustment mechanism is provided between the testing assembly and the base plate. A position counting component is provided on one side of the slide rail mechanism. This invention, through a stepped planning of the distance the support assembly is pulled, and by comparing the tensile force display of the force gauge and the tensile stress reading of the stress sensor, forms multiple regular test control groups. Coupled with a high-precision testing environment, this enables comprehensive measurement of tensile stress data and completes a comprehensive and accurate recording of the tensile strength of the substrate glass.

The utility model discloses a high-precision testing machine displacement measuring device, and relates to the technical field of testing machine displacement measurement. The device comprises a device base, a translation fixing block, a position adjusting fixing block and a laser range finder, the translation fixing block is fixedly installed outside the device base, the laser range finder is movably arranged outside the translation fixing block, the position adjusting fixing block is fixedly connected with the device base, and a position adjusting assembly is fixedly installed outside the position adjusting fixing block. According to the device, the translation adjusting assembly is arranged, the laser range finder can vertically and horizontally move outside the translation fixing block by rotating a second rotating switch and a first rotating switch, the laser range finder can be always horizontally perpendicular to a detected object, and the position of the detected object can be easily changed by adjusting the position; therefore, the distance meter can accurately measure the distance of each object.

The utility model relates to the technical field of machine tool precision detection devices, and discloses a polygon prism five-spindle-head rotation angle detection device, which comprises a marble platform and a servo motor, the outer side of the output end of the servo motor is sleeved with a sleeve, and the top end of the servo motor is provided with a driving assembly; the driving assembly comprises a fixing plate, and the fixing plate is fixedly connected to the top end of the servo motor. According to the utility model, the five-shaft-head speed reducer is arranged in the connecting tool fixed in the middle of the five-shaft-head flange, the servo motor is connected to the bottom end of the five-shaft-head speed reducer, and the polygon prism body is arranged at the top end of the connecting tool, so that the polygon prism can be accurately and accurately connected with the five-shaft-head flange under the instruction of a computer. The servo motor drives the five-shaft-head speed reducer to rotate by a corresponding angle, and meanwhile, the polygon prism body installed on the connecting tool also rotates by a corresponding angle, so that the accurate control of the rotation angle is realized, the measurement precision can be effectively improved, and the condition that the rotation angle of a product is out of tolerance is avoided.

The utility model discloses precise detection equipment for a welding production line, which comprises a bottom rail, a bottom plate is arranged on the bottom rail, a first rail is arranged on the bottom plate, first cylinders are arranged on the two sides of the first rail respectively, a supporting seat is arranged at the output end of each first cylinder through a connecting plate, a clamping cylinder is arranged on each supporting seat, and a second cylinder is arranged on each clamping cylinder. A clamping jaw is arranged at the output end of the clamping air cylinder. A side mounting plate is arranged on one side of the bottom rail, a second rail is arranged on the side mounting plate, a second air cylinder and a moving plate are arranged on the second rail, and a supporting plate is arranged on the moving plate; vertical plates are arranged on the two sides of the side mounting plate, third air cylinders are arranged on the vertical plates, and the output ends of the third air cylinders are connected with CCD assemblies through lifting plates. The device is simple in structure, the position of a fixed workpiece is adjusted from multiple directions, the CCD assembly is used for photographing, transmission and detection, and the using effect is good.

This invention relates to the technical field of graphitization heating devices for lithium-ion battery anode materials. It includes a base, a heating chamber, a furnace, and a heating furnace. The heating chamber is located on top of the base, and the furnace and heating furnace are located above it for graphitization operations. The heating furnace includes a first, second, and third heating furnace: the first heating furnace is in zone A of the furnace, simulating small-batch production in a box furnace to ensure high-precision testing; the second heating furnace is in zone B, simulating batch production in a crucible furnace to achieve high-consumption testing; and the third heating furnace is in zone C, simulating multi-variable comparative production to help find the optimal formula. The furnace and heating chamber contain heating elements and insulation layers to provide a high-temperature environment. A ventilation system is installed around the furnace for rapid cooling and timely product removal. This device can perform zoned heating, improving energy utilization, meeting various heating needs, and effectively solving the current problem of low graphitization yield.

The utility model relates to a digital-analog hybrid chip function test system, which is applied to the technical field of chip test and comprises an analog test unit, a digital signal generation unit, an analog switch unit and a tested unit, the simulation test unit is used for providing a level signal and a test signal and testing the tested unit; the digital signal generation unit is connected to the simulation test unit and is used for receiving the level signal and outputting a digital time sequence signal, a control signal and a 5V voltage; the analog switch unit is connected to the digital signal generation unit and is used for receiving the control signal and the 5V voltage and controlling the on-off between the digital signal generation unit and the tested unit according to the control signal; and the tested unit is connected to the analog switch unit and the analog test unit, and is used for receiving the test signal and the digital time sequence signal and testing according to the digital time sequence signal and the test signal. The method has the technical effects that high-precision testing is realized, and the testing cost is reduced.

This invention relates to the field of sealing function testing technology, and particularly to a blueberry bottle sealing quality testing device and method based on spectral analysis. Technical problem: Existing methods for testing the sealing performance of bottled foods using pressure and vacuum methods require opening the bottle for sampling, resulting in product waste and inability to perform full inspection. Existing methods have low detection rates for micropore leaks and cannot detect internal micro-cracks, and exhibit severe baseline drift under high temperature and humidity conditions. Technical solution: The blueberry bottle sealing quality testing device and method based on spectral analysis includes a support, conveyor belt, limiting groove, blueberry bottle body, probe assembly, window assembly, environmental sensing assembly, calibration assembly, cleaning assembly, and edge computing assembly. This invention achieves non-destructive, high-precision testing of blueberry bottle sealing performance through non-contact detection, a self-cleaning mechanism, and dynamic environmental compensation, reducing product waste, improving testing accuracy, and ensuring stable operation even under surface contamination conditions.

The present application relates to the technical field of test piece, in particular to a superhard alloy head test piece with super-small Kelvin gap. It comprises two metal test pieces, and superhard alloy heads are embedded in the two metal test pieces. In the present application, the super-small Kelvin gap with a size of 0.015 mm and the isolation design of the insulating layer can effectively separate the current and voltage transmission paths, accurately eliminate the interference of the wire resistance and the contact resistance on the measurement results, meet the high-precision requirement of the super-small pin in the precision test, and the superhard alloy heads are embedded in the special-shaped grooves of the metal test pieces, the high hardness of more than 70HRC and the high-temperature resistance of more than 1000 DEG C are utilized to significantly reduce the ablation loss of the metal test piece during use, even in high-frequency test or high-temperature environment, the stable contact of the first contact head and the second contact head with the measured object can be ensured, the reliability of the contact performance is maintained, and the service life of the test piece is prolonged.

The present invention provides a synchronous system testing method, device and synchronous testing equipment. The method includes: obtaining a first time reference; the first time reference being the time reference of the output signal of the device under test; according to the first time reference, performing a common view comparison between the output signal and the time reference corresponding to the satellite common view server to determine the test result of the output signal. Embodiments of the present invention can not only achieve satellite common view but also select a time reference according to the output signal of the device under test, so that the time reference of the synchronous testing equipment is consistent with the time reference of the device under test, eliminating system deviation and meeting the requirements of high-precision testing at the same time.

According to the dexterous hand repetitive motion precision testing tool provided by the invention, the zero position limiting assembly is added in the repetitive motion precision testing module, the zero position limiting assembly provides the driving force for the moving block, so that the moving block abuts against the measuring pin of the dial indicator, and the moving block continues to compress the measuring pin under the action of the driving force, so that the measuring pin is accurately measured. When the measuring needle is static, the measuring zero position of the dial indicator measuring needle is located in the middle of the stroke of the dial indicator measuring needle, the measuring zero position of the dial indicator measuring needle is obtained, and therefore the same repeated motion precision testing tool is used for completing repeated motion precision testing of the left hand and the right hand of the dexterous hand. The test time of the repeated motion precision test is shortened; moreover, the repetitive motion precision test of the two hands of the dexterous hand can be completed by designing one test tool for the repetitive motion precision of the dexterous hand, and the design difficulty of the test tool for the repetitive motion precision of the dexterous hand is reduced.