52 results about "Test distance" patented technology

The invention aims to provide a dual-camera focusing and focus checking system based on a UVC mode, and the system achieves the automatic switching of an equivalent test distance between a main camera and an auxiliary camera through a cooperative control mechanism of an electric sliding rail type Chart platform and a teleconverter module. MTF threshold tables corresponding to different test stages are called according to different test stages of focusing, focus checking, final inspection and the like of the camera, so that the MTF values of the different test stages are compared; through adaptive focusing and focus checking of the double cameras based on the UVC mode, the cameras delivered to a user can work in an optimal use state.

The invention relates to the technical field of running intelligent testing, in particular to a running intelligent testing method, system and equipment based on multi-camera cooperation. According to the invention, identity verification is carried out through deep learning face recognition, and basic information is obtained; establishing an adaptive rule set including a test distance and a speed setting range by combining real-time environmental parameters; multi-camera cooperative acquisition is utilized, and space mapping is established by calibrating common coordinate points to realize track splicing; a neural network is adopted to analyze motion characteristics such as speed trend, acceleration distribution and attitude change, and track effectiveness is evaluated; and finally, generating a report containing test data and training suggestions. According to the invention, through combination of multi-camera cooperation and an adaptive rule, omnibearing monitoring is realized, the standard can be flexibly adjusted according to the environment and individual characteristics, and support is provided for scientific training.

The utility model provides a testing device and a testing system. The testing device comprises a track structure; the rotating structure comprises a base slidably connected with the track structure and a rotating assembly capable of rotating relative to the base, a supporting rod is fixedly connected to the center of the rotating assembly, and a rotating shaft assembly is rotatably connected to the top end of the supporting rod; the human body model sleeves the periphery of the supporting rod and can rotate relative to the base around a first rotating center along with the rotating assembly; the head model is fixedly connected with the rotating shaft assembly and can rotate relative to the supporting rod around the second rotating center along with the rotating shaft assembly; an image acquisition and recognition part is arranged on the rotating shaft assembly to recognize an image in front of the human body model and judge a test result. The testing device and the testing system can effectively and accurately complete testing distance changing, head turning and nodding actions so as to meet the testing requirements, are higher in accuracy, can automatically judge the testing result, greatly improve the testing efficiency and liberate manpower.

The present invention addresses the problem of providing an optometric device that, when an optical member is set and a pseudo refractive power test is performed, prevents a decrease in test precision caused by changing the apparent size of a visual target presented at a far test distance position. An optometric device (1) comprises a reflector head (100) that has an optometric window (114) for observing a visual target M, a visual target presentation device (200) that presents a visual target M at a far test distance position, and a control unit (330) that controls the parts of the device. The reflector head (100) sets, at the position of the optometric window (114) which is disposed in front of an eye E being examined, a spherical lens that is used to simulatively present, as a near-distance visual target at a near test distance position, a visual target M which is presented at a far test distance position. The control unit (330) has a visual target rendering magnification alteration unit (336) that, when the spherical lens is set and a pseudo near-distance test is performed, changes the rendering magnification β of the visual target M displayed on the visual target presentation device (200) to a magnification that suppresses a change in the apparent size of the visual target M presented at the far test distance position.

In a test method for performing a cable magnetic flux leakage test for detecting defects, a test device (100) and a cable (200) are moved relative to each other in a longitudinal direction of the cable. In this case, by means of a magnetizing device (120) of the testing device, the part of the cable is magnetized segment by segment in such a way that the magnetizing field line in the cable is oriented substantially in the longitudinal direction of the cable. The circumference of the magnetized portion of the cable is scanned by means of a magnetic field sensitive probe (140) of a probe device (130) for detecting a leakage magnetic field due to a defect. The probe device has a plurality of magnetic field-sensitive probes (140) which are arranged offset from one another in the circumferential direction and are arranged at a test distance (142) from the surface of the material under test during the test. The electrical probe signals of these probes are evaluated for qualification of defects. Each probe of the probe arrangement is arranged in a movably arranged test shoe (150) having a sliding surface (146) for sliding on the circumferential surface of the cable, the probe (140) being arranged at a probe distance (145) relative to the sliding surface. In a first test configuration, the test shoe (150) is pressed onto the circumferential surface such that the sliding surface (146) is in contact with the circumferential surface and the probe is held at a limited first test distance from the surface of the material under test substantially corresponding to the probe distance.

A system includes a controller having one or more processors. The system also includes a memory, and instructions stored on the memory, and executable by the one or more processors to output a control signal that causes an actuation of a valve to move a test distance via an electromechanical actuator; receive electrical property data corresponding to the actuation over the test distance by the electromechanical actuator; evaluate a condition of the valve based on the electrical property data; and generate an output based on the condition of the valve.

The utility model discloses a tool for detecting the environmental applicability of a single-point dof range finder, and the tool comprises an adjusting table which is disposed in a temperature control cabinet; the number of the reflection panels is two, the reflection panels are symmetrically arranged on the adjusting table, and an adjusting lead screw used for adjusting the distance between the two reflection panels is arranged in the adjusting table; and the fixed support is arranged between the two groups of reflection panels, the fixed support comprises an adjusting platform and a rotating support, the rotating support is rotatably arranged on the adjusting platform, and the rotating support is used for fixing a range finder to be measured and adjusting the angle of the range finder to be measured. According to the utility model, the adjusting table is arranged in the temperature control cabinet, the range finder to be measured is arranged between the two groups of reflection panels through the fixing support, the distance is prolonged through the reflection between the mirror surfaces, and then the detection panel is arranged at the corresponding position for adjustment until the required test distance is reached.

The application discloses a drift fast compensation method for an infrared radiation calibration system, which is based on two ambient temperature calibrations and two test distance calibrations, and is used for correcting temperature drift and path attenuation respectively. The blackbody temperature, the ambient temperature and the test distance are set to have at least two values respectively. In the linear response interval of the detector of the infrared radiation calibration system, the values of two factors are fixed, the infrared image gray values of the blackbody at the two values of the third factor are obtained, and at least four infrared image gray values are obtained. The expression equations of the four infrared image gray values are solved to obtain the blackbody radiation brightness response, the temperature drift compensation coefficient, the distance drift coefficient and the detector response bias. According to the solving result, the fast compensation of the gray value attenuation caused by the changes of the ambient temperature and the test distance is realized.

Systems and methods for contactless identification of an optical fiber under test (FUT) are disclosed. System embodiments include an optical power meter and an optical accessory. The power meter can include a casing, a detection port extending through the casing, and a photodetector optically coupled to the detection port within the casing. The accessory can include a housing and a focusing lens. The housing extends between an attachment end and a testing end, and encloses an interior region defining an optical pathway. The attachment end is releasably connected to the detection port, while the testing end is configured to be positioned at a testing distance from the FUT and allow fiber light emanating from the FUT to enter the optical pathway via free-space propagation. The focusing lens is positioned within the housing along the optical pathway and configured to direct the fiber light onto the photodetector through the detection port.

The application discloses a method and device for adjusting the testing distance of a camera module card, wherein the method comprises: obtaining the theoretical working distance of a target camera module, and determining the distance adjustment interval according to the theoretical working distance; controlling the testing card to move along the Z-axis in the distance adjustment interval according to a preset stepping strategy, and triggering the target camera module to collect corresponding card images at each stepping position to generate an image sequence; extracting the edge amplitude features of each card image, and calculating the gray value deviation based on the edge amplitude features as the definition evaluation value of the corresponding card image; determining the target stepping position according to the definition evaluation value, and driving the testing card to move to the target stepping position to complete the adaptive adjustment of the testing distance. Thus, the objectivity, consistency and accuracy of the determination of the testing distance of the card are improved.

The invention relates to a method for measuring a test distance (DT) separating a camera (CAM) from a user (1), comprising steps of: - prompting the user to get in a first position, - displaying a reference object, - acquiring a first image comprising the reference object and at least one body of the user, - detecting and measuring a calibration length from the reference and obtaining a calibration distance separating the camera and the reference object, - detecting and measuring at least one first reference length relative to the at least one body part, - prompting the user to get in a second position, - acquiring a second image comprising the at least one body part, - detecting and measuring at least one second reference length (RL') in the second image, and - obtaining the test distance (DT).

The present invention relates to a human body dynamic potential tester based on a capacitive voltage divider, comprising: a potential sensor using a coaxial capacitive voltage divider for detecting a potential signal; a signal processing system disposed within the potential sensor for amplifying and filtering the potential signal to obtain a measured value; a data visualization module for visualizing the measured value; a main control module for compensating the measured value and controlling the human body dynamic potential tester as a whole; a power supply module for supplying power to the human body dynamic potential tester; and a housing enclosing the power supply device of the human body dynamic potential tester, the housing being grounded. The present invention is advantageous in eliminating system measurement errors caused by test distance, integrating a signal sampling module within a coaxial high-voltage voltage divider, and thereby reducing environmental noise introduced by signal lines. It is capable of accurately measuring electrostatic dynamic potential and monitoring human body potential in anti-static work areas such as electronic product and pyrotechnic production workshops.

The invention relates to the technical field of rubber friction characteristics, and discloses a method for testing rubber friction characteristics, which comprises the following steps: preparing a rubber wheel according to sample requirements of a testing machine, additionally arranging a slip rate control device, controlling the rotating speed of the rubber wheel, and enabling the rubber wheel to freely roll and slip relative to a friction disc of the testing machine during testing. Test parameters including a slip angle, a load, a slip rate, a test distance and a test temperature are set, the equipment is operated to carry out friction test on each test working condition, and a sensor of the testing machine is utilized to automatically record related data. According to the invention, different slip speeds are realized by controlling the slip rate, the rubber wheel rolls while slipping, the contact area is not fixed at the same position, and the temperature of the contact area does not rise sharply, so that the temperature does not affect the test result.

The invention relates to a method for adjusting a trigger threshold value of a capacitive pressure sensor, wherein the capacitive pressure sensor comprises an operation panel for pressing. The method comprises the following steps: applying a plurality of test presses on the operation panel with the same force; determining test distances from the position of the test press to a reference position, wherein the test distances have different lengths; determining a test capacitance value caused by the test pressing; fitting a function relationship between the test capacitance value and the test distance according to the trend of the test capacitance value along with the test distance; and determining the trigger threshold according to the distance from each position on the operation panel to the reference position by using the function relationship. The invention further relates to a capacitive pressure sensor and to a method for determining whether a pressing operation on a capacitive pressure sensor is valid.

The invention discloses a low-frequency material wave transmission rate testing method based on a luneberg lens, and belongs to the technical field of radar material wave transmission rate test.The method comprises the steps that a testing clamp, a transmitting luneberg lens antenna and a receiving luneberg lens antenna are placed on a testing platform, and a to-be-tested material sample is placed on the testing clamp; a to-be-tested material sample is placed between the transmitting luneberg lens antenna and the receiving luneberg lens antenna, the test distance is adjusted, and the center of the to-be-tested material sample is located at the focus position of the transmitting luneberg lens antenna and the receiving luneberg lens antenna; the transmitting luneberg lens antenna and the receiving luneberg lens antenna are respectively connected with the vector network analyzer; an electromagnetic wave is transmitted by a transmitting antenna, is focused by a transmitting-side luneberg lens to form a parallel wave, penetrates through a to-be-tested material sample, enters a receiving-side luneberg lens to be focused, and is received by a receiving antenna; and comparing the transmitting signal parameter of the transmitting antenna with the receiving signal parameter of the receiving antenna by using the vector network analyzer, and evaluating the wave transmission rate of the to-be-tested material sample at low frequency.

The application provides a high-voltage transmission line electric test positioning method based on a UAV sensing array, relates to the technical field of electric power detection, and solves the multiple limitations of the existing electric test positioning process. The method comprises the following steps: designing a cross beam and connecting the cross beam below a UAV, and configuring MEMS electric field sensing modules at four end points of the cross beam; operating the UAV to fly to a position corresponding to a preset safe distance of a transmission line, and acquiring an initial electric field value corresponding to the position; adjusting the attitude of the UAV based on the initial electric field value, and acquiring an induced electric field value output by the MEMS electric field sensing module at the moment; calculating the distance from a corresponding measuring point of the UAV to the transmission line and the elevation angle of the corresponding measuring point of the UAV relative to the transmission line; combining the electric field measurement value at the moment and the corresponding standard data of the transmission line, performing electric test distance measurement judgment, and analyzing the live line condition of the transmission line. The application is a non-contact and high-precision electric test positioning scheme, and improves the maintenance efficiency and application reliability.

The present application relates to the field of optical fiber sensing, in particular to a kind of multi-fusion sensing long-distance testing device and method.It includes at least one sensing optical fiber, at least two drivers, at least two synchronizers and a manager;Driver sends test signal to sensing optical fiber, and receives sensing signal returned in sensing optical fiber, adjacent two drivers are connected by a sensing optical fiber, and the length of sensing optical fiber is less than or equal to the sum of the farthest test distance of two end drivers;Synchronizer corresponds to driver one by one, sends synchronization signal to sensing optical fiber, and receives synchronization signal sent by opposite end synchronizer, to control the driver at the two ends of each sensing optical fiber to carry out test synchronously or asynchronously;Manager is connected with the driver and synchronizer at one end of sensing optical fiber through signal interface, manages the test process of each driver, and analyzes the sensing signal received by driver.It can extend the length of sensing optical fiber, and use simple process to complete multiple continuous tests.

The present invention discloses a method for measuring the flexoelectric coefficient of a separable piezoelectric two-dimensional material, comprising: testing N samples with different distance values ​​respectively, where the distance value is the distance from the thickness bisector of the two-dimensional material to the thickness bisector of the sample along the thickness direction of the base plate in one sample; since the distance value affects the strain state and piezoelectric polarization of the two-dimensional material, the flexoelectric contribution and the piezoelectric contribution are separated according to the total polarization difference of multiple samples, thereby accurately measuring the flexoelectric coefficient of the two-dimensional material.

This disclosure provides a test structure and a test method for short-circuit window, contact resistance, and sheet resistance. The test structure includes: a substrate with an isolation structure therein; a gate structure located above the isolation structure; an active region located above the substrate; multiple contact plugs located above the active region and electrically connected to the active region, the contact plugs being arranged in an array; the gate structure being arranged in a serpentine pattern, the gate structure being adjacent to and spaced apart from the sidewalls of each contact plug; a first pad electrically connected to the gate structure; a second pad and a third pad electrically connected to different contact plugs, respectively; a fourth pad electrically connected to the gate structure, and the fourth pad and the first pad being located at opposite ends of the gate structure; the width of the isolation structure is greater than or equal to the width of the gate structure, and the shortest distance from the contact plug to the gate structure is the test distance. Using the above technical solution, the test requirements for short-circuit window, contact resistance, and sheet resistance can be met, and the test accuracy can be improved.

This application discloses a transmission line impedance calibration method, system, and storage medium. The method includes: acquiring the impedance change slope of a sample transmission line of the same type as the transmission line under test, and calibrating the original time-domain reflection impedance curve of the transmission line under test based on this impedance change slope to obtain a target time-domain reflection impedance curve. By acquiring the impedance change slope of a sample transmission line of the same type and performing compensating calibration on the transmission line under test, this application effectively solves the problem of a false increase in impedance value with increasing test distance in long-distance transmission line TDR testing. The calibrated impedance data is closer to the true characteristics of the transmission line harness, providing a reliable data basis for harness quality assessment.

The utility model relates to a laser wind measurement radar wind speed detection range testing arrangement, belong to laser wind measurement radar technical field. The utility model discloses electric turntable simulation wind speed, realizes wide range's wind speed simulation through the adjustment motor speed, through 9 reflector and carries out light path to turn over, realizes 50m test distance simulation, the base subassembly and the cover shell subassembly of device integrate reflector subassembly and electric turntable subassembly in an organic whole, form laser wind measurement radar wind speed detection range testing arrangement, convenient to use, simple operation.

The present disclosure provides a Bluetooth test method, device, electronic equipment and storage medium, the method comprises: obtaining a plurality of test distances, determining the transmission power corresponding to each test distance; wherein the plurality of test distances are different from each other; based on the transmission power corresponding to each test distance, sending a request signal, and obtaining the signal strength of the request signal received by the to-be-tested terminal and the test data sent in response to the request signal; based on the test data, determining the transmission rate; according to the transmission rate and the signal strength, the Bluetooth test result corresponding to the test distance is obtained; based on the Bluetooth test result corresponding to all test distances, the Bluetooth test result of the to-be-tested terminal is determined. The scheme of the present disclosure can accurately simulate different communication distance scenarios without changing the actual physical distance between the test terminal and the to-be-tested terminal, and realize automatic detection of Bluetooth function.

The utility model relates to an OIS test device. The OIS test equipment comprises a rack; the material shaking test mechanism and the light source assembly are oppositely arranged on the rack, and the test distance of the OIS is adjusted by moving the light source assembly; the material shaking test mechanism comprises a shaking assembly and an OIS test fixture used for placing a tested camera module, the OIS test fixture is arranged on the shaking assembly, and the shaking assembly has shaking of three degrees of freedom of arc, horizontal and vertical so as to realize arc, horizontal and vertical shaking tests of the tested camera module. The OIS test equipment provided by the utility model is convenient to operate, high in test efficiency and convenient and accurate in data acquisition, and improves the performance and quality of a final product.

The invention relates to the technical field of PCB (Printed Circuit Board) testing, and discloses detection equipment, which comprises at least one group of testing components, and each group of testing components comprises two testing heads; the test head comprises: a turntable; the first bracket is fixedly connected with the turntable; the second bracket is connected with the turntable; the at least two probe assemblies are connected with the first support and the second support respectively, and the projections of the probe assemblies are located in the edge area of the projection of the rotary table in the axis direction of the rotary table. According to the detection equipment provided by the invention, the probe assemblies are arranged in the edge area of the turntable, so that when the two test heads are arranged in an attached manner, the turntable is rotated to enable the probe assembly on one test head to have a minimum test distance with the probe assembly on the other test head; the minimum test distance is smaller than the minimum test distance when the probe assembly is arranged in the middle of the rotating disc in the prior art, the adaptability of the detection equipment to the contacts on the PCB is improved, and the test precision is improved.

The utility model provides a test pencil, and belongs to the technical field of test pencils. Comprising a light-transmitting plastic shell, a copper rivet is arranged at one end of the light-transmitting plastic shell, and a spring, a neon tube, a resistor and a clamping seat are arranged on one side of the copper rivet. According to the utility model, through the arrangement of the telescopic spring, when a position needing electricity measurement is too deep, pressure is released through the telescopic spring to enable the detection head to move in parallel, so that the testable distance can be increased, otherwise, the detection head is extruded to enable the telescopic spring to be extruded so as to shorten the actually-measured distance; when a charged test is carried out on a deeper electricity-measuring structure, the position of the deeper electricity-measuring structure causes that the test pencil cannot be in contact with the deeper electricity-measuring structure, so that the detection head can be stretched out and drawn back according to the use condition, and the effect of carrying out the charged test on the deeper electricity-measuring structure is achieved; and external power supply equipment is butted with the power supply socket, so that the performance of the test pen can be tested before the test pen is used.

To provide a visual testing tool that enables accurate testing in visual examinations for infants and children, such as the visual examination during the 3-year-old health checkup. [Solution] A visual examination device 1 for use in visual examinations, comprising at least two surfaces, wherein one surface 10 has a target 11 for visual acuity testing, and the other surface 20 has a target 21 for binocular vision testing. Preferably, the target for binocular vision testing is made by attaching alternating strip-shaped images for the right eye and left eye to a lenticular lens, and more preferably, the target for visual acuity testing and the target for binocular vision testing are made such that the testing distance for visual acuity testing using the target for visual acuity testing is the same as the testing distance for binocular vision testing using the target for binocular vision testing, in which case the testing distance is preferably 30 cm to 40 cm.

The utility model discloses a testing device for testing a distance measuring sensor, and the testing device comprises a first testing plate and a second testing plate which are oppositely arranged; the adjusting assembly is connected between the first test board and the second test board, and the adjusting assembly is used for adjusting the distance between the first test board and the second test board; the distance measuring sensors are arranged on the side, facing the second test board, of the first test board, and each distance measuring sensor is used for detecting the distance from the second test board to the corresponding distance measuring sensor; and the test terminal is connected with each distance measuring sensor, and the test terminal is used for acquiring and outputting the detection distance of each distance measuring sensor. Through the testing device, the distance measuring performance of a plurality of distance measuring sensors can be synchronously tested, and the testing efficiency is improved.

The invention relates to test equipment for testing the display degree of a test sample with an adjustable visual field distance. The test equipment comprises a darkroom experiment cavity defined by a box body and a cover body, a light source, a sample mounting module and an illuminometer are arranged in the box body; an observation assembly for observing the display degree of the to-be-detected sample is rotationally arranged on the box body; a short-distance test mode and a long-distance test mode are arranged in the box body; an adjusting module for adjusting the visual field distance between the sample mounting module and the observation assembly is also arranged in the box body; the test equipment is ingenious in design, provides a short-distance test mode and a long-distance test mode, can meet the requirements of different test standards and test distances, and improves the flexibility and the application range of the test equipment. The visual field distance between the sample installation module and the observation assembly is adjusted through the adjusting module, and the observation conditions of people for the emergency lighting lamp at different distances in actual use can be simulated more truly.

The invention relates to a short-distance test method for full-beam scanning of a large-aperture phased-array antenna, and solves the technical problems that a far-field test environment of the large-aperture phased-array antenna is difficult to realize and full-angle scanning test is time-consuming and labor-consuming. The method comprises the following steps: constructing a typical unit model of the phased array; collecting radiation field data in the typical unit array; radiation fields in all the unit arrays under the short-distance condition are obtained according to the equivalent corresponding relation; calculating far-field radiation characteristics of the phased-array antenna; and evaluating the radiation characteristics of the phased-array antenna at different scanning angles. According to the method, a similar unit group equivalent relation is constructed, and the performance of the phased-array antenna can be calculated only by testing typical units; the test distance is reduced from a traditional full-array far field to a unit-level far field; and the far-field characteristic of any scanning angle is quickly calculated by combining feed phase adjustment. The method significantly reduces the test complexity, guarantees the precision of a directional diagram, improves the test efficiency, and is suitable for the rapid evaluation of the full-beam performance of various large-aperture phased-array antennas.