35results about How to "Test fit" patented technology

The invention provides an AR imaging system virtual image distance testing method and device. The method comprises the following steps: calibrating a camera to acquire a corresponding relation betweena Focus value at each location and the virtual image distance; adjusting an adjustable lens by using the Focus value of the first preset stepping, enabling the camera to perform the first shooting onthe virtual image formed by the to-be-tested AR product, thereby acquiring the Focus value of the picture with the highest definition in the first shot picture; taking the acquired Focus value as thecenter, and adjusting the adjustable lens of the camera by using the second preset stepping, enabling the camera to perform the second shooting on the virtual image formed by the to-be-tested AR product, and acquiring the virtual image distance of the to-be-tested AR product according to the Focus value of the picture with the highest definition in the second shot picture, and the corresponding relation between the Focus value of each location and the virtual image distance. Through the method provided by the invention, the virtual image distance of the AR product can be tested, and the testing precision is high, the cost is low, the high virtual image distance testing efficiency is realized, and the method is suitable for testing the virtual image distance of the large-batch AR products.

The invention relates to a lens testing and calibration device, which includes a base, a test seat and a camera mounting seat. A connecting lens barrel is disposed on a camera. The lens testing and calibration device also includes a close-up lens placement rotary disc and more than two groups of test board device. The close-up lens placement rotary disc is connected onto the test seat and is provided with a plurality of close-up lens placement spaces. Each group of test board device includes a moving seat connected slidably with the base and a test board assembly mounted on the moving seat and capable of covering a field angle range of a lens under test or moving away from the field angle range of the lens under test. By use of different movable test boards and close-up lenses mounted on different positions of the close-up lens placement rotary disc, the device can quickly test and calibrate lenses of different focal distances only by slightly moving the test boards and rotating the close-up lens placement rotary disc in the case that a tester is not required to move back and forth with the test seat; and is not only simple and quick in operation and high in production efficiency, but also light in overall weight and easy to carry and transport.

The invention relates to an online testing method for mass production of UHF identification electronic tag antenna. The testing method comprises the following steps: firstly, performing capacitive-coupling on a metal small disc of a probe end and a pad of a tag antenna where the chip is pasted; secondly, performing balance-unbalance and impedance conversion of a signal coupled by the probe via compensation Barron; thirdly, sampling and extracting the power information of several fixed points on a slot line of the signal converted by the compensation Barron via the slot reflectometer principle; and finally, acquiring a reflection coefficient loaded by a port by using the acquired power information of the several points via calculation so as to calculate the input impedance of the tag antenna. The method has the advantages that the input impedance of the tag antenna is measured before the chip is pasted, the production cost is effectively reduced, the matching degree between the tag antenna and the chip is reflected precisely, and the method is suitable for testing various types of tag antennas.

The invention relates to a device and method for testing the multi-wavelength refractive index of a lens, and the device comprises a tested lens, and the device comprises a light source assembly, a signal detection module, a moving reflector moving back and forth at a constant speed, and a diopter measurement module. According to the lens multi-wavelength refractive index testing device, related parameters for calculating the refractive index are obtained by detecting interference signals, a prism does not need to be manufactured, detection of related angles of the prism is not needed, operation is more convenient, the testing period is shortened, rapid testing can be achieved, and the lens multi-wavelength refractive index testing device is suitable for detection of finished lenses; moreover, by arranging the second light source assemblies with various wavelengths and the corresponding first photoelectric detection assemblies, and combining the third light source assembly with superradiation luminescence and the second photoelectric detection assembly, the device can adapt to tested lenses with various thicknesses, and even if the tested lenses are too thick or too thin, the accuracy of test parameters can be ensured, and test errors can be reduced.

This invention relates to more than one wireless internet card and note computer assemble system to test network property on mobile communication network, wherein, the test item comprises containing volume, real volume, error code rate, frame error codes rate, block error rate, receive frame number, signal intensity; the test agreement is as TCP/IP,UDP,PPP,MMS to test sound quality, receive emails go onto net, flow media application layer quality; in reality using single card test and double card loop test.

The invention provides a module lens test method and system. The module lens test method comprises that a capture unit captures images formed after lens resolution to form a resolution power picture; the capture unit carries out sampling on edges of a frame in the resolution power picture to form a plurality of sampling points; a processing unit carries out black and white contrast on the grayscale of the sampling points and forms a data fitting curve; and the processing unit carries out Fourier calculation on the data fitting curve and obtains a spatial frequency response value of a lens. The module lens test method and system realize fully-automatic module lens test; and since the processing unit carries out sampling and processing, that is, Fourier calculation, on the data fitting curve automatically, automatic processing of resolution power high-frequency test of the module lens can also be realized, and manual interpretation is not needed; and the module lens test method and system are suitable for full-range (low-frequency, intermediate-frequency and high-frequency ) resolution power test.

The invention provides a system for automatic temperature test and long time test of network equipment. The system comprises a test environment creating device, a hygrothermograph, and a test device, wherein the test environment creating device comprises an airtight box body used for creating the test environment, the hygrothermograph is used for measuring the temperature and humidity of the test environment, and the test device is used for testing throughput of the network equipment and acquiring the throughput value of the throughput test, and is also used for sending a temperature and humidity reading instruction to the hygrothermograph, acquiring the temperature value and the humidity value measured by the hygrothermograph, and saving the temperature value, the humidity value and the throughput value so as to finish one round of test. The invention also provides a method for automatic temperature test and long time test of the network equipment. The system can automatically record and save the throughput value of the network equipment and the temperature value and humidity value of the test environment in the temperature test and long time test, thereby improving the test efficiency, being stable and not easy to have an error, and being suitable for long time test.

The invention discloses a camera module testing method based on a lattice standard board. The testing method comprises the following steps: a database related to attributes of all intersection points in an image of the lattice standard board is provided; the camera module photographs the lattice standard board to acquire the image of the lattice standard board; all corner points in the image of the lattice standard board are captured; the attributes of the corner points and the attributes of the intersection points in the database are compared to determine positions of the corner points in the lattice standard board; and according to the positions of the corner points in the lattice standard board and the coordinates of the corner points, the coordinates of a target area are determined to calculate the value of the target area, and testing on the camera module is thus completed.

The invention provides a helicopter mooring flight testing protective device and a mooring method of the helicopter mooring flight testing protective device. The helicopter mooring flight testing protective device and the mooring method are simple, practical, convenient to operate, safe, reliable and low in cost. According to the technical scheme, the helicopter mooring flight testing protective device comprises a longitudinal protective rod, a transverse protective rod and four installation bases, the longitudinal protective rod and the transverse protective rod are two metal tubes respectively, the lengths of the longitudinal protective rod and the transverse protective rod are equal to the diameters of helicopter rotors, each the installation base is provided with a base, a compression cover and a stopping pin, the bases are provided with double U-type grooves, helicopter longitudinal sliding tubes are placed into the U-type grooves in one sides of the bases, the longitudinal protective rods are placed into the U-type grooves in the other sides of the bases, the compression covers are connected with the bases through the stopping pins, the transverse protective rods are placed into U-type grooves of the compression covers, and then the compression covers and the bases are tightly pressed through bolts.

The invention belongs to the technical field of automobile testing, particularly relates to a system for testing field performance of a tire pressure monitoring system (TPMS) and aims at solving the problem that field performance of an automobile cannot be tested during road driving in the prior art. The system is characterized by comprising an actuator and a controller, wherein the actuator is used for measuring the internal pressure of all tires in real time and transmitting pressure signals to the controller, and signals indicating tire pressure in a driving state are generated under the control of control signals of the controller; the controller receives the tire pressure signals sent from the actuator, the tire pressure signals are processed according to set control flow, and then control signals are sent to the actuator to control the actuator to act to complete measurement and regulation of tire pressure. According to the system provided by the invention, a tire pressure closed-loop control system based on a practical gas circuit is established by virtue of the actuator and the controller, closed-loop regulation is performed on the gas circuit according to a difference between target tire pressure and current tire pressure, and thus a driving pressure regulation function is achieved under the condition of generating no communication interference.

The invention discloses a probe and a test device, which are used for testing a chip, the probe is arranged in a mounting hole of a test seat, the probe is in a sheet shape and is made of a conductivematerial, and the probe comprises a base part, a buffer part and a contact part, wherein the base part is located in the mounting hole and clamped on the test seat, the buffer part is located in themounting hole and integrally and spirally extends outwards from the base part, and the contact part is located in the mounting hole and integrally extends from the buffer part to be separated from thebase part; a tail end of the contact part protrudes out of the mounting hole and extends into the test space. The probe is integrally formed, so impedance and noise can be reduced, manufacturing costof the testing device comprising the probe is reduced, and assembling convenience is improved.

The invention relates to a negative lens focal distance testing device and a testing method. The negative lens focal distance testing device comprises a light source, a target simulation system, a monitoring system and a data acquisition and processing system, wherein the target simulation system and the monitoring system are sequentially arranged on an emitted light path of the light source; the monitoring system is connected with the data acquisition and processing system; and a negative lens to be tested is arranged between the target simulation system and the monitoring system. The invention provides the negative lens focal distance testing device and the testing method which are small in error and high in measurement efficiency.

The invention provides a counter weight connection structure of a counter weight testing device of an abnormal environment of an oil hydraulic cylinder. The counter weight connection structure is characterized by comprising a counter weight body connection plate connected with the bottom of a counter weight body, a bracket connection seat, and an inner connection structure arranged between the counter weight body connection plate and the bracket connection seat, wherein the inner connection structure comprises a right side connection plate arranged at the right side of the counter weight body connection plate; a bottom connection plate is arranged at the lower part of the right side connection plate; the bottom connection plate and the right side connection plate are hinged; the other end of the bottom connection plate is connected with the counter weight body; a connection column and a decompression spring are arranged at the upper part of the bottom connection plate; the upper end of the connection column is connected with the counter weight body. The counter weight connection structure of the counter weight testing device of the abnormal environment of the oil hydraulic cylinder, provided by the invention has the beneficial effects of simple structure, convenience for utilization and accuracy in testing direction linkage; testing data is accurate, and the device is suitable for testing the oil hydraulic cylinders with various types.

The present invention provides a circuit board testing device. The device comprises: a branch pressing mechanism comprising a top tray; and a bearing assembly electrically connected with an external test instrument. The pressing mechanism is provided with a dead point position, and when the pressing mechanism is located at the dead point position, the to-be-tested circuit board is pressed and contacted on the bearing assembly by the top plate, so that the to-be-tested circuit board is conducted with an external testing instrument. Based on the technical scheme, the circuit board testing device does not need to be additionally provided with a locking mechanism to achieve the locking function o fa top plate at the pressing position, so that the structure of the circuit board testing device is greatly simplified, and a rocker sliding block mechanism is simple in structure. Therefore, when the pressing mechanism adopts the rocker sliding block mechanism, the overall size of the circuit board testing device can be reduced, so that the circuit board testing device is suitable for testing circuit boards with small specifications.

The invention provides a novel derivatization reagent, a method for testing a sulfur-containing component and application. The derivatization reagent has a special structure, and can be used for directionally analyzing and testing sulfide in wastewater and mercaptan components in an organic phase by using an online derivatization chromatographic analysis method. The novel derivatization reagent can react with sulfur-containing compounds in wastewater and can further react with mercaptan in organic components, and can be used for testign sulfur-containing components in wastewater and organic phases at the same time, so that sulfur ions and mercaptan substances are monitored on line at the same time. By adpoting the liquid chromatography on-line derivatization analysis method, the sample reproducibility is good, the detection limit is high, interference factors are few, and the test result is accurate.

The invention provides a counter weight testing device of an abnormal environment of an oil hydraulic cylinder. The counter weight testing device is characterized by comprising a rack, a counter weight body, and a counter weight body connection structure and an oil hydraulic cylinder connection structure which are arranged between the rack and the counter weight body, wherein the rack is further provided with a hand pressing device; the hand pressing device is connected with the oil hydraulic cylinder; the oil hydraulic cylinder is arranged on a hydraulic cylinder connection seat structure; the hand pressing device is connected with the oil hydraulic cylinder through a gas pressure pipe. The counter weight testing device of the abnormal environment of the oil hydraulic cylinder, provided by the invention, has the beneficial effects of simple structure, convenience for utilization and accuracy in testing direction linkage; testing data is accurate, and the device is suitable for testing oil hydraulic cylinders with various types.

The invention provides a fault arc protection electric appliance characteristic test method, which is used for testing an AFDD (Avionics Frequency Division Duplex) line bearing a fault arc protection function, and comprises the AFDD line coupled by a high-frequency magnetic ring and a high-frequency signal generator, an AFDD circuit penetrates through the circle center of the high-frequency magnetic ring, the signal output end of the high-frequency signal generator is connected with a coil surrounding the high-frequency magnetic ring, and after a high-frequency signal output by the high-frequency signal generator is injected into the high-frequency magnetic ring, an electric arc environment is simulated by an electromagnetic induction effect to test the AFDD circuit; according to the invention, a test circuit is established by using power electronic devices, fault arc current characteristics appearing in a line are simulated, rapid test of the AFDD is realized, and wide market space is provided for research and development of the AFDD and research of a portable AFDD test device.