31results about How to "Addressing Test Accuracy" patented technology

The invention discloses a method and a circuit for testing a multi-clock domain. The multi-clock domain comprises a plurality of working clocks. The method for testing the multi-clock domain comprises the following steps that: each working clock and each testing clock in each clock domain provide a corresponding clock for a working circuit through a clock switching control circuit; a selection signal of each clock domain is set to provide a working enable signal for the clock switching control circuit in each clock domain; the effectiveness or ineffectiveness of the working enabling of different clock switching control circuits is controlled by the selection signal of each clock domain; and a test state of the clock domain corresponding to the clock switching control circuit is controlled. By the method and the circuit for testing the multi-clock domain, simultaneous test on circuits in the multi-clock domain and test on circuits in a cross-clock domain simultaneously are realized.

The invention provides a method for testing a dielectric constant and a loss angle tangent parameter of an antenna cap material. The method comprises the steps of: setting a testing waveguide length according to a testing frequency band, connecting the testing waveguide to a network analyzer, calibrating the network analyzer, testing an initial phase and a standing wave; placing a test block with wavelength of odd number times of that of a half waveguide or any length, measuring the phase and the standing wave by using the network analyzer; and scanning the dielectric constant of the material by using a parameter scanning function of an Ansoft HFSS (High Frequency Structure Simulator), setting the dielectric constant of the material to be 3.3-3.4 and the step length of the material to be 0.01, and obtaining a scanning simulation result of the phase. By adopting the invention, accurate testing of the dielectric constant and the loss angle tangent parameter of the antenna cap material is effectively improved, and the dielectric constant and the loss angle tangent (tan delta) parameter of a dielectric material can be obtained. The invention has the advantages of increasing working efficiency and reducing correlation of the testing precision and the size of a sheet to be tested.

The invention relates to a cylinder chromatographic method based on distributed sensing, which is characterized in that infrared radiation exists in a testing object along all space directions, the center of the testing object is used as a standard to make a cylindrical surface which comprises the testing object, the cylindrical surface is axially divided in equal distance to obtain parallel round planes with the number of M, the distance between two adjacent round planes depends on the requirements of three-dimensional testing precision, and the higher the accuracy is, the shorter distance between the round surfaces is. The invention has the advantages that a multi-point infrared photoelectric sensor on the cylindrical surface is combined with a collimator to obtain the chromatographic data of the cylindrical surface of the object to be tested in multiple directions instantly, the imaging errors of non-parallel rays are eliminated, a chromatographic inversion algorithm of the cylindrical surface is used for reconstructing the distribution of a three-dimensional flow field, and the problems of chromatographic testing accuracy and real-time performance for an infrared emission spectrum is solved.

The invention relates to a shipborne resonant column instrument which is composed of torsional vibrating electromagnetic driving devices, a longitudinal vibration device, a balancing base and a detection device, wherein four torsional vibrating magnets respectively arranged in four driving coils are respectively fixed at four end points of a right-cross-shaped swing arm through screws, the four driving coils are respectively arranged in four coil sleeves, and the four driving coils are respectively connected with a power supply through cables so as to form four sets of torsional vibrating electromagnetic driving devices; the four sets of torsional vibrating electromagnetic driving devices are respectively fixed on a supporting inner cylinder at equal angles. According to the invention, a problem that the test accuracy of an existing resonant column instrument is affected by the swinging of an experimental bench is solved, so that the resonant column instrument which is widely applied to geotechnical tests can be applied to sea exploration vessels, and can be used for timely detecting and analyzing collected sediment samples, and therefore, the collected sediment samples are not required to be taken to a land laboratory to be detected and analyzed. In such a way, carrying and storage are omitted, and manpower, material resources and time are saved.

The invention discloses a load and displacement integral wireless indicator of a belt type pumping unit. The load and displacement integral wireless indicator comprises a load transducer, a junction box, a transmitting antenna arranged at one end of the junction box and pressure bearing heads arranged at the upper end of the load sensor. A main circuit board and a battery are arranged in the junction box, the main circuit board integrates an acceleration transducer chip, a signal amplifying circuit module, an analog to digital (A/D) conversion circuit module, a micro controller unit (MCU), a battery voltage stabilization module and a wireless transmitting module. The invention further discloses a detection system of the load and displacement integral wireless indicator of the belt type pumping unit. The detection system comprises the load and displacement integral wireless indicator, a ground receiving and processing unit and a computer connected with the ground receiving and processing unit. The load and displacement integral wireless indicator of the belt type pumping unit and the detection system of the load and displacement integral wireless indicator are simple in structure, convenient and rapid to detect, safe and reliable and low in power consumption. Besides, the load transducer is corrected and calibrated automatically through the computer, a zero-regulator resistor is not needed to be arranged externally, and simultaneously, system working and hibernation time can be set in real time manually.

The invention provides a fixture preventing measurement deviation and a manufacturing method thereof. The fixture comprises a fixture body and a vacuum adsorption device. The fixture body is provided with at least one positioning groove suitable for accommodating at least one COF workpiece, and a bottom is formed; and the fixture body is further provided with a plurality of open holes disposed in the bottom where the grooves locate, and the open holes and the vacuum adsorption device form a vacuum adsorption structure so as to adsorb the COF workpiece.

The invention relates to an explosion shock wave test and damage evaluation technology, and particularly relates to a surface shock wave test device and an evaluation method in an explosion environment. According to the invention, a problem that the test result and the damage evaluation result of the existing explosion shock wave test and damage evaluation method are inaccurate is solved. The surface shock wave testing device in the explosion environment comprises a closed cavity, a supporting stand column, a flexible substrate, a flexible covering layer, four pressure sensors, a wireless data recorder, four wires and a computer, wherein the closed cavity is a cylindrical structure; the supporting stand column is vertically fixed to the center of the outer bottom surface of the closed cavity. the flexible substrate is a strip-shaped structure; the flexible substrate is hooped in the middle of the outer side surface of the closed cavity, and the two ends of the flexible substrate are sewn together; the flexible covering layer is the strip-shaped structure; and the flexible covering layer is arranged on the outer side surface of the flexible substrate in a hooping mode, and the two ends of the flexible covering layer and the outer side surface of the flexible substrate are sewn together. The device is suitable for explosion shock wave testing and damage evaluation.

The invention discloses a program testing method and apparatus. The method comprises the following steps: obtaining original version data and current version data of a check-in test task; obtaining structure information corresponding to the original version data and change information corresponding to the current version data, wherein the change information is data information about change of the current version data relative to the original version data; according to the change information and the structure information, obtaining a recording position of the change information in the original version data; according to the recording position, performing querying in a preset function description table to obtain function description information corresponding to the recording position; and according to the function description information corresponding to the recording position, generating a to-be-test function table corresponding to the change information, wherein the to-be-test function table is used for recording to-be-tested function information corresponding to the change information. According to the invention, the technical problems of low test precision and low test efficiency caused by manual marking of to-be-tested function points are solved.

A multioptical-fiber SPR probe with temperature calibration is prepared for arranging Au film on surface of semispherical prism, setting two sets of optical fiber bundles to be coupled with prism end surface at vertical direction on end surface of said prism, separately curing biochemical sensitive film and temperature sensitive film on spherical Au film in corresponding to vertical end surface directions of two said bundles, using SPR to detect temperature of liquid to be detected in realtime and substituting detected temperature in calibration model to calibrate influence of temperature on test result.

The embodiment of the invention provides a wind power blade torsion test tool and a wind power blade torsion test method. The wind power blade torsion test tool comprises a test board, an annular fixing device and a loading device. The annular fixing device is used for being arranged on the outer side of a testing section of the wind power blade in a sleeving mode in the length direction of the wind power blade, and the loading device is used for pulling the cable to apply traction force to the annular fixing device so that the wind power blade can generate torsion deformation capable of being detected. According to the wind power blade torsion test tool provided by the embodiment of the invention, only the loading device applies the load to the wind power blade in the loading process, no other load causes interference to the wind power blade torsion test tool, and the force direction and the force arm are not changed when the loading device loads the load; therefore, the torque rigidity analyzed by using the tool is more accurate.

The invention discloses a video testing method and device, electronic equipment and a storage medium, relates to the technical field of image processing, and further relates to the technical field ofmultimedia testing, and the method comprises the steps: carrying out the screen recording of a currently played video, and obtaining a recorded to-be-tested video; performing framing processing on therecorded to-be-tested video to obtain a plurality of to-be-tested image frames; cutting the video playing area of the to-be-tested image frame to obtain a plurality of to-be-tested playing area imageframes; and testing the to-be-tested playing area image frame, and outputting video test data. According to the embodiment of the invention, the precision and accuracy of video testing can be improved.

The invention discloses an indoor distribution power test method and device for a mobile communication base station. The device comprises a first switch module, a band-pass filter bank, a second switch module, a first frequency mixing module, a second frequency mixing module, a first local oscillation module, a second local oscillation module, a clock module, an A/D conversion module and an FPGA module. The method disclosed by the invention can control the filter bank to be rapidly switched when different operators and different communication systems are measured, local oscillation output power is configured in real time, a sampling clock at a high sampling rate is adopted for performing high-speed acquisition on data, and then rapid and accurate measurement on in-band power is realized according to different communication systems, so that not only the problem that the traditional measured power is inaccurate is solved, but also the effect that different communication base stations aresent at the same time and are measured at the same time is realized, and the problems of test efficiency and test accuracy are effectively solved.

The invention provides a method for testing an azimuthal angle of a base station antenna. The method comprises steps as follows: a good magnetic field position A with a magnetic field value in an interval of 35-55 is searched from the side edge or the back of the base station antenna; test equipment is vertically lifted and stays in the position A for 2-3 s, and when vertical deviation of a pitch angle and step amplitude of an azimuthal value are both in a reasonable range, the azimuthal value a is locked by the test equipment, and a tester is prompted; after the tester acquires the prompt, a meter is slowly translated and attached to the back position B of the base station antenna at a constant speed; the condition that the test equipment is in a non-moving or micro-moving state for 3-5 s is acquired through comprehensive monitoring for a gyroscope, a three-axis acceleration sensor and a magnetic sensor, then a specific rotating angle is locked automatically, a translation angle value b is obtained, and an accurate azimuthal value c of the base station antenna is obtained according to a calculation formula shown in the specification. Therefore, the optimal test is realized through optimization of various sensors and filtering of data.

The invention relates to a testing device for a thermal response test of a ground-source heat pump system and belongs to the technical field of the ground-source heat pump systems. The device comprises a water-wind unit, two water pumps, a water tank, a turbine flowmeter, three platinum resistance temperature sensors and two stop valves, wherein the inlet of the water-wind unit is connected with the bottom outlet of the water tank and the outlet of the water-wind unit is connected with the inlet of the water tank by use of a pipeline to form an energy storage cycle; the first platinum resistance temperature sensor is arranged inside the water tank; the bottom outlet of the water tank is connected with the first stop valve by use of a pipeline with the second water pump and the second platinum resistance temperature sensor; a test hole formed in the bottom of the water tank is connected with the second stop valve by use of a pipeline with the turbine flowmeter and a third platinum resistance temperature sensor, and therefore, a test cycle is formed. The device is applicable to the earlier-stage thermal response test of the ground-source heat pump system; as a result, the reliability and the comprehensiveness of the thermal response test is improved, and the numerical accuracy of guidance is improved.

The invention discloses a tandem type sensor and a measuring method. The tandem type sensor is composed of a wide-range sensor, a high-precision small-range sensor, a sensor protection device, connecting structures of all the parts and a waterproof device. The high-precision small-range sensor and the large-range sensor are connected through a unique connecting structure; the sensor protection device is arranged to protect the high-precision small-range sensor; and in addition, the waterproof device is arranged to perform waterproof protection on the sensor. With the tandem sensor and measuring method of the invention adopted,the problem of inaccurate measurement of the axial force in a small range when the axial force in a large range is measured is effectively solved, and the axial force in each range can be effectively measured; and the tandem sensor and measuring method have an important value for improving the testing precision of a geotechnical triaxial test in a high-pressure state. Sensors with different ranges are adopted, different mechanical structures are designed, and the requirement for measuring pressure or tension and pressure under various overwater or underwater environment conditions can be met.