57results about How to "Fast and Accurate Testing" patented technology

Detecting a leak from a site in a sealed system with a source of pressurized gas which is capable of passing through the site, a composition of matter which adheres to the surfaces of the system and which is capable of showing the presence of the gas escaping from the site. The method includes: injecting gas into the system to a pressure in excess of the surrounding pressure, and covering the external surface with the composition to identify the location of the site by the interaction of the escaping gas with the composition. The composition is foam that includes a surfactant which forms a least one bubble in the presence of escaping gas and an indicator which changes color in the presence of the escaping gas. The leak is an opening down to at least the size of a hole 0.001″ in diameter. A gas detector may also be used.

The invention relates to the field of automobile braking torque testing devices and aims at providing a device and method for testing the sliding resistance of a brake caliper assembly. The device for testing the sliding resistance of the brake caliper assembly comprises a machine frame, a testing linear guide rail, a testing assembly, a fixing and holding assembly and a testing loading mechanism, wherein the testing linear guide rail is fixedly connected with the machine frame, the testing assembly is fixedly connected with a sliding block of the testing linear guide rail, and the fixing and holding assembly is located on the back side of the testing assembly and fixedly connected with the machine frame. The device for testing the sliding resistance of the brake caliper assembly is high in efficiency and precision of testing the sliding resistance of the brake caliper assembly.

The invention discloses a parameter adaptability testing method for a PSS (power system stabilizator) of a grid system, which can be used for effectively measuring the adaptability of a parameter of the PSS. The parameter adaptability testing method for the PSS of the grid system comprises the following steps of: carrying out dynamic modeling on a multi-machine power system; calculating a full-dimensional characteristic value of the system; testing the sensitivity of the characteristic value to a PSS gain coefficient; determining the optimal value of a PSS phase shifting link by using a characteristic value sensitivity variation curve; and testing the adaptability of the parameter of the PSS.

The invention discloses a device and a method for testing the radial permeability of concrete gas. The device comprises a pressure device and a gas conveying device; the pressure device comprises a sample, a rigid sealing device arranged between the upper end and the lower end of the sample, a loading device which acts on the rigid sealing device, a sensing gasket placed between the sample and thecontact surface of the rigid sealing device, and a universal meter connected with the sensing gasket; and the gas conveying device is connected with the pressure device. According to the device and the method disclosed by the invention, a flexible sensor is embedded into an elastic gasket to prepare the self-sensing gasket for monitoring a load borne by the sample; the problem of concrete sealingand load quantification is solved; the quantitative real-time capture of the air pressure change in the gas permeation process is realized through a high-precision barometer in the gas conveying device; and the quantitative representation of a radial permeability coefficient of the concrete gas is realized.

The invention relates to a method for testing the underwater plugging-unplugging performance of an underwater wet type connector. The method comprises: S1, an underwater wet type connector plug is fixed at a front clamp and an underwater wet type connector socket is fixed at a rear clamp; S2, cables of the underwater wet type connector plug and the underwater wet type connector socket are connected with an external testing device; S3, a motor assembly is started and drives the front clamp to drive the underwater wet type connector plug and the underwater wet type connector socket to be plugged; S4, according to a display result of the external testing device, the performance of the underwater wet type connector is determined; and S5, the motor assembly is turned off and testing is ended. According to the invention, the front clamp and the rear clamp are installed in the water tank to connect the connector plug and the connector socket respectively and fixedly and thus the connector performance is tested in an underwater state, so that the accuracy of the underwater wet type connector is improved; the cables of the plug and the socket are led out respectively and are connected withindicator lamps and the connector performance is determined by observing the on-off situation of display lamps.

Detecting a leak from a site in a sealed system with a source of pressurized gas which is capable of passing through the site, a composition of matter which adheres to the surfaces of the system and which is capable of showing the presence of the gas escaping from the site. The method includes: injecting gas into the system to a pressure in excess of the surrounding pressure, and covering the external surface with the composition to identify the location of the site by the interaction of the escaping gas with the composition. The composition is foam that includes a surfactant which forms a least one bubble in the presence of escaping gas and an indicator which changes color in the presence of the escaping gas. The leak is an opening down to at least the size of a hole 0.001″ in diameter. A gas detector may also be used.

The invention provides a test method and a test device for a touch panel. Each driving touch line of the touch panel is driven by two connected driving electrodes, each induction touch line of the touch panel is driven by one connected induction electrode, and the test method of the touch panel comprises the following steps: sending a test signal to at least one induction electrode of the touch panel; whether the two driving electrodes corresponding to the driving touch lines receive the coupling signals or not is tested; if yes, judging whether the driving touch lines are broken or not according to the relationship between the time difference between the time when the two driving electrodes corresponding to the driving touch lines receive the coupling signals and a time threshold value; and if not, determining that the driving touch lines are subjected to routing disconnection. According to the invention, the test signal is sent to at least one sensing electrode of the touch panel, and the time difference of receiving the coupling signal by the two driving electrodes corresponding to the driving touch line is compared, so that whether the driving touch line is broken or not can besimply, quickly and accurately tested.

The invention discloses a test device for testing the torque coefficient of a oversized high-strength bolt, and relates to the technical field of bolt physical performance testing. The test device iscomposed of the following modules: a test platform, a counter-force frame, a power loading device, a loading puller, a puller axial adjustment assembly, a counter-force frame axial adjustment assemblyand a control system. The counter-force frame provides supporting counter-force for the tested bolt, the loading puller is used for clamping the tested bolt and transmitting the supporting counter-force, the power loading device provides torsion power for the tested bolt, and the three modules are matched with the control system so that automatic testing of the torque coefficient of the bolt canbe quickly and accurately carried out. Through axial translation of the counter-force frame and the loading puller, the device can adapt to test requirements of different specifications of tested bolts, and has the advantages of wide application range and high universality.

A rapid test device includes a micropad chip configured for a multi-parameter chemical testing of an input sample. A plurality of paper layers of the micropad chip are in fluid communication, including a sample absorption element, a filtering element configured to filter the input sample, and a sample distribution element configured to distribute the input sample received from the filtering element to a remainder of the plurality of paper layers. One or more reacting elements associated with the multi-parameter chemical testing of the input sample have one or more colorimetric reagents in fluid communication with the sample distribution element. A colorimetric result displaying element in fluid communication with the one or more reacting elements is configured to display a colorimetric result of the testing of the input sample with the at least one reacting element for a respective chemical test of the multi-parameter chemical testing.

An intelligent mobile device double-contact test device is provided that includes a base, a support rod, a mobile device placement frame, an X-axis telescopic module, a Y-axis telescopic module, a first test telescopic module, a rotating module, an auxiliary telescopic module, a second test telescopic module, a control processing module and a computer device. According to the size of an intelligent mobile device and the software to be tested, test coordinates and a test order are set in the computer device. The computer device instructs, through the set test coordinates and the set test order, the X-axis telescopic Module, the Y-axis telescopic module and the first test telescopic module to test the software, and at the same time achieves a double-contact test by using the rotating module, the auxiliary telescopic module and the second test telescopic module. The intelligent mobile device double-contact test device may accurately and fast test software, saves time and effort, and solves developing dead zones or developing time delay.

The invention discloses an electret microphone current test circuit, including a direct current power supply, a digital potentiometer, a first analog switch, a calibration resistor, an electret microphone, a signal conditioning part, a second analog switch, a digital full-amplitude modulation part and a high-performance alternating current coupling data acquisition card. The direct current power supply, the digital potentiometer, the analog switches, the calibration resistor and the electret microphone form a loop, the signal conditioning part consists of a first operational amplifier, a second operational amplifier and a third operational amplifier, the first operational amplifier and the second operational amplifier are connected with the digital full-amplitude modulation part through the second analog switch, and the digital full-amplitude modulation part and the third operational amplifier are connected with the high-performance alternating current coupling data acquisition card. The invention also proposes a test method of the electret microphone current test circuit, and through calculation of an actual Res value of a line and calculation of a microphone current, solves the problem existing in a present electret microphone current test method that a test result is inaccurate.

The invention discloses an automatic test method and device for a voltage analog-to-digital converter and a computer readable storage medium. The method comprises the following steps: firstly, a testinput file of a voltage analog-to-digital converter is acquired, and the test input file is a test file generated based on high-voltage thresholds and low-voltage thresholds of all channels of the voltage analog-to-digital converter; and secondly, based on data drive and the test input file, a pre-compiled test script is called to automatically test the voltage analog-to-digital converter, and a test result is generated. According to the invention, the problems of low efficiency and error proneness of purely manual test of a voltage analog-to-digital converter in the prior art are solved, anda voltage analog-to-digital converter can be tested efficiently, quickly and accurately.

The invention discloses a cast steel joint stress test device. The structure of the cast steel joint stress test device comprises a first cast steel joint, a second cast steel joint, a fixed sphere, circular sections, a fixing supporting seat, fixing cylinders, a third cast steel joint, rolling balls, ring blocks, a fourth cast steel joint, protective covers, stress test devices, cast steel innerwalls, grooves, cushion blocks and a reinforcement foot; the circular section is connected with the corresponding fixing cylinder; the fixed cylinder is provided with the corresponding protective cover; the ring block is connected with the corresponding rolling ball through the corresponding cushion block; the cast steel inner wall is connected with the corresponding stress test device; and the fixing supporting seat is connected with the reinforcement foot. According to the cast steel joint stress test device, the stress test devices are adopted, so that the stresses value of the cast steel joints can be accurately and quickly measured; and the rolling balls are arranged in the grooves, so that a rolling effect can be realized, and therefore, the positions of connection holes are changed.The cast steel joint stress test device has the advantages of high safety and structural simplicity. The fixing cylinders are provided with the protective covers, so that the service life of cast steel can be greatly prolonged.

The invention discloses a wire wrapping tension test device and test method. The device comprises a pedestal installed in an adjustable manner and a forcemeter arranged on the pedestal; an analog stressed piece is connected with the forcemeter, the analog stressed piece comprises a connection arm and a tension block connected with the forcemeter, the tension block simulates partial circumferentialwall of a magnet ring, and the resultant force direction of stresses of the tension block is accordant with the direction of the test force of the forcemeter. When in test, the stressed end of the forcemeter is connected with the analog stressed piece, and the forcemeter is fixed, so that the direction of the tension suffered by the analog stressed piece is accordant with the stress direction ofthe actual stressed piece, the tension suffered by the analog stressed piece can be test by wrapping a wire. The device provided by the invention is simple in structure and easy to install and fine tune; the test method is easy to operate and simple in process, can be applied to test the wire wrapping tension on a testing machine on the scene, and adjust in time without changing the structure of the whole machine, and is accurate and quick to test.

The invention relates to the technical field of coal seam gas pressure measuring, in particular to a gas pressure rapid measuring device. The device comprises at least four hole sealing capsules, a gas injection device, a gas injection pipe, a pressure measuring pipe, and a control device. The hole sealing capsules are arranged inside a drill hole at intervals to form a second hole sealing section, a gas injection space and a first hole sealing section which are sequentially arranged in the direction from a coal seam to a drill hole opening. The first end of the pressure measuring pipe penetrates through the hole sealing capsules and the coal seam and extends to a pressure measuring gas chamber; the second end of the pressure measuring pipe is sealed or provided with a pressure gauge; thefirst end of the gas injection pipe is open and arranged inside the gas injection space; and the gas injection device is connected with the second end of the gas injection pipe which is provided withan gas injection switch. A first pressure sensor and a second pressure sensor are arranged on the pressure measuring pipe and the gas injection pipe respectively; the control device is in signal connection with the first pressure sensor, the second pressure sensor and the gas injection switch respectively; and the measuring device is suitable for the rapid measurement of underground coal seam gaspressure. The invention also provides a gas pressure rapid measuring method.

This invention discloses one finger force test device, wherein its test parts are set with pressure part or stretch part for finger test to send pressure onto sensor elements or to send pressure source stretching force into stretching part; the sensor element and pressure source are connected to display element to display the finger pressure or anti-stretching size onto display element; it provides user with rapid and accurate pressure or anti-stretching force.

The invention discloses a method for testing the frequency characteristic of a front plate of a fiber-optic gyroscope. The method includes the steps that a frequency control word corresponding to each testing frequency point is preset, cosine sweep check digital signals and reference digital signals are acquired by using a direct digital frequency synthetic method, wherein the reference digital signals are formed by conducting 90-degree phase shifting on the cosine sweep check digital signals, the cosine sweep check digital signals are converted into cosine sweep check analog signals and then input to the front plate of the fiber-optic gyroscope, analog digital conversion is conducted on output signals of the front plate of the fiber-optic gyroscope, and then the sample sequence of the output signals of the front plate of the fiber-optic gyroscope is acquired; two paths of correlation coefficients are acquired through correlation operations; all the testing frequency points are repeated to acquire the sequence of the two paths of correlation coefficients, and then the sequence is sent to an upper computer; parameters of the amplitude-frequency characteristic, parameters of the phase-frequency characteristic and parameters of the frequency characteristic of the front plate of the fiber-optic gyroscope are calculated and acquired. According to the method, the frequency characteristic of the front plate of the fiber-optic gyroscope can be rapidly and accurately measured, and the device utilizing the method has the advantages of being simple in structure, low in cost, high in measuring speed, large in measuring frequency range, and high in accuracy.