925 results about "Power test" patented technology

The invention discloses a charged test method for a current transformer and application thereof. The method comprises the following steps of: serially connecting a charged analyzer with a secondary low-voltage loop to serve as a test loop through two switches of a secondary terminal box on a secondary side loop of the current transformer under the condition of operating the charged current transformer; injecting a different-frequency test signal generated by the analyzer into the test loop through the analyzer, and realizing a charged error test and a charged frequency response test by measuring and calculating loop key parameters under an injected frequency signal; and changing a method for secondary load impedance to change excitation conditions through the analyzer, and measuring load change influence to test a charged exciting characteristic curve. Compared with the prior art, the method has the advantages that: the charged test of the current transformer can be performed without contact of primary voltage, an upward current source, a standard transformer or a load box, the safety and reliability of an uninterrupted power test are guaranteed, the equipment is high in integration, portable and light, and the method is favorable for on-site and laboratory tests and long-term online monitoring.

The invention relates to a centralized monitoring and managing system for optical cable resources. A system structure based on two stages of monitoring and managing platforms and a layer of monitoring and operating platform is at least regulated and controlled by the two stages of monitoring centers of a province and city stage and a region stage, and the monitoring of various modes of optical time domain reflectometer (OTDR) test, light power test, linking test thereof and the like is also provided to an optical fiber in use or a standby fiber in an optical fiber network at an executing lay by a plurality of monitoring stations correspondingly. The system also provides an abundant system managing function; especially, a resource topology drawing of an entire network can be drawn according to the configuration parameter of the system; and the operation of quick and accurate positioning during maintenance and fault examination is assisted by utilizing a geographic information system (GIS) technology. Therefore, according to the system disclosed by the invention, the expense of manpower and financial resources for maintenance and management can be effectively reduced, and the time of fault diagnosis and treatment is effectively shortened, so that the safe and stable running of the entire network is ensured.

The invention discloses a device and method for measuring gait touch information. The device for measuring gait touch information comprises a computer, a six-component holding power test board and an integral signal conditioning and acquiring circuit. The measuring method comprises the following steps of: acquiring signals of a strain sensing sensor and a flexible array sensor in the six-component holding power test board by using the integral signal conditioning and acquiring circuit and transmitting the signals to the computer; and extracting corresponding parameters by using a test and analysis software module of the computer. An integral instrument is designed, and detection mechanisms of vector contact force information and contact state information are unified in the aspects of a physical layer, a hardware layer and a data layer, so that complete foot region touch original information is directly provided.

This invention provides one standing wave ratio test method, which comprises the following steps: a, executing front power test and back test through switch on transmission line to get transmission line front power P and back power P; b, using current feedback channel gains to adjust P and P to get antenna front power and back power; c, using P and P to compute standing wave ratio VSWR. This invention also provides one stand wave ratio test device.

The invention relates to the technical field of motor tests and discloses a testing system of a hydraulic motor. The testing system of the hydraulic motor comprises a motor, a speed changing box, a tested motor, a loading motor, a first oil way, a second oil way, a feedback oil way and a compensation oil way. The speed changing box is provided with an acceleration gear and a deceleration gear, the input end of the speed changing box is in driving connection with the output end of the motor, the loading motor is butted with the tested motor through a power shaft, the output end of the speed changing box is in driving connection with the power shaft, the first oil way serves as an oil inlet channel of the tested motor, the second oil way serves as an oil return channel of the tested motor, the oil outlet end of the feedback oil way is communicated with the first oil way, and the oil outlet end of the feedback oil way selectively supplies oil for the oil inlet end of the feedback oil way or supplies oil for the oil inlet end of the feedback oil way through the loading motor. By means of the testing system, mechanical and hydraulic compensation power recovery modes or the hydraulic compensation power recovery mode can be selected according to needs, and testing requirements for power tests, service life tests, batch tests and the like on most majority of hydraulic motors can be met.

The invention discloses a big-power test programmable resonance wave voltage source which is based on superposition principle, the resonance wave voltage source includes three phase commutating bridge, dc-to-ac converter, transformer in series, three phase resistance-capacitance loop and current track control circuit, the three phase commutating bridge is connected with the electricity net via inlet inductance and three switch; the structure of the dc-to-ac converter is three single-phase H bridges, each of which composes four switching tubes IGBT, the big-power test programmable resonance wave voltage source which is based on superposition principle adopts principle of separating base wave and resonance wave, the electricity provides the voltage of base wave, voltage of resonance wave is provided by the resonance wave voltage source, they are combined to make tested equipment get required voltage wave, the resonance wave is generated by controlling the dc-to-ac converter, the control mode can decreases the current in the dc-to-ac converter, and increases the capability of system, it can replace the programmable power source under most conditions.

A radio frequency (RF) power amplifier protection system for a radio. The protection system utilizes a resistive tap connected to the drain of a power amplifier transistor and a high speed voltage detector. The protection system uses short, low-power tests pulses to determine the quality of an antenna load upon tuning the radio to an RF carrier frequency by transmitting the short test pulse. If the measured voltage value exceeds a calibrated value, the power of the RF transmitter is reduced for subsequent operation or the RF transmitter is shut down completely. The invention also includes a system and method for detecting when an antenna is disconnected from a radio using an low frequency AC signal to measure the resistance of an antenna connected to an RF transmitter.

A hand-held, self-contained, battery-powered test instrument for analyzing composition of a sample includes an exciter for exciting at least a portion of the sample, a compact cross-dispersed spectrometer for receiving an optical signal from the excited portion of the sample and a processor for processing spectral data about the optical signal from the spectrometer. The exciter may include a spark generator and a counter electrode, a laser or other device for generating the optical signal from the sample portion. The spectrometer has a wavelength range broad enough to enable the test instrument to detect and determine relative quantities of carbon, phosphorous, sulfur, manganese, silicon, iron and other elements necessary to identify common alloys. The spectrometer includes a structural member made of a light-weight material having a small coefficient of thermal expansion (CTE). The spectrometer is dimensionally stable over a range of expected ambient temperatures, without controlling the temperature of the spectrometer.

The invention discloses an automatic test system for the functions of a television set and a method thereof. The system comprises a computer system, a signal generator, a power tester and a television system; the computer system is connected with the signal generator, so that various signal formats and test maps required by a test are generated and output to the television system; the computer system is connected with the television system, so that the television system is notified to complete relevant operation and simultaneously read the state and data fed back by the television system; and the computer system is connected with the television system through the power tester, so that the power signals of the television system are acquired. According to the system and the method thereof, a computer serves as a central control unit, control software serves a core part for coordinating the work of all units, whether the image display and sound output are normal or not is judged by reading the power difference of the power tester, no external command input module and manual interference are needed, and an operator can automatically test all the functions of the television set only by pressing one button of the computer system.

The invention discloses an energy-regeneration type converter power test system and method. The system comprises a power grid, an isolation transformer, a first smoothing reactor, a second smoothing reactor and a tested converter. The tested converter comprises a first PWM converter, a second PWM converter and a direct current bus capacitor, wherein the first PWM converter and the second PWM converter transmit active power under the buffer effect of a direct current bus capacitor. The first PWM converter imitates load characteristics of the system. The second PWM converter achieves system energy regeneration, unit power factor inversion is achieved by controlling the output currents of the second PWM converter and the voltages of the power grid to be identical in frequency and phase, and the active power balance between the input and the output of the tested converter is achieved by controlling the direct current voltages between the first PWM converter and the second PWM converter to be constant. The energy-regeneration type converter power test system and method can effectively ensure test quality, improve test efficiency, improve the equipment utilization rate, save equipment cost, save energy, reduce emission, simplify operation entry barriers and eradicate potential safety hazards.

Test modules, systems, and methods employing capacitors for the testing of the solder joint connections between a printed circuit board (PCB) and a socket of a device are presented in embodiments of the current invention. A test module having capacitors in parallel, and in particular embedded capacitors, can be used to test tied traces and their solder joint connections by measuring the total capacitance of the capacitors. Embodiments of the current invention present no-power tests that can be used with a variety of testing platforms and test fixtures, such as in-circuit testing (ICT) and manufacturing defect analysis (MDA.) Additionally, the test module can be used with a variety of sockets, such as a ball grid array, a pinned grid array, and a land grid array.

A device and method for limiting damage to a semiconductor device under test when the semiconductor device fails during a high current, or high power test is provided. The occurrence of a failure of the device under test is detected, and power applied to the semiconductor device is diverted through a parallel path element upon detection of failure of the semiconductor device.

The invention discloses a power test climbing falling-prevention device. The device comprises a device base, a front end frame and a rear end frame are arranged at the two ends of the device base, the rear end frame is connected with an extending frame, the lower of the front end frame and the lower of the extending frame are both provided with supporting oil cylinders, a hydraulic station and a hydraulic controller are arranged on the upper portion of the device base, an inclined oil cylinder and a lifting oil cylinder matched with the hydraulic station are arranged on the device base, a device top base is arranged on the top of the lifting oil cylinder, a motor is arranged in the middle of the device top base, the motor is matched with a driving belt wheel, the driving belt wheel is matched with a driven belt wheel through a belt, the driven belt wheel is matched with a winding frame, a lifting cable is wound on the winding frame, and the end of the lifting cable is matched with a kidney connecting device. The power test climbing falling-prevention device is convenient to move and easy to operate, when a worker carries out climbing work, the worker can be well protected, and serious hurts to the worker during falling are prevented.

The invention discloses a power battery power test method and system and belongs to the technical field of power batteries. The method includes statically placing a 100% charged power battery in a testing environment at the preset temperature for a first preset time, and allowing the temperature of the power battery to stabilize at the preset temperature; adopting the preset discharging rate to discharge the 100% charged power battery till a preset charge state; acquiring a discharging power according to the calibrated parameters of a motor, adopting the discharging power to discharge with the constant power, when the discharging time passes till a second preset time, testing a first voltage of the power battery; if the first voltage is equal to a minimum discharging voltage, allowing the discharging power serve as the discharging power of the power battery in the preset charge state. By the aid of the method, the actual maximum pulse power of a vehicle can be tested conveniently, and basis is provided for vehicle start and acceleration performance prediction and the selection of power battery meeting the vehicle power requirements.

The invention relates to a full power test method and a test device for a whole wind turbine, adopting a double machine set energy feedback method to test the full power of the whole wind turbine. The cabins of two sets of wind turbines are arranged in a back-to-back mode, wherein, one set of cabins which carry out motorized operation are the dragging wind turbines, and the other set of cabins which carry out the electricity generating operation are the testing wind turbines. Energy provided by an electric fence can provide electric energy for the dragging wind turbine by a current-variable cabinet by the side of dragging wind turbine, and the dragging wind turbine drives the testing wind turbine to rotate by a spindle and a coupler and provides needed torque for the testing wind turbine. Electric energy produced by the testing wind turbine can be fed back to the dragging wind turbine by the current-variable cabinet. When the testing wind turbine runs under different operating modes, the output characteristic of the testing wind turbine can be detected by a test system. The invention adopts a double machine set energy feedback method, which saves electric energy. At the same time, the cabins of the two wind turbines are arranged in a back-to-back mode. The machinery fittings are simple and are easy and fast to install. Because of adopting field bus control technology, the test device for a whole wind turbine has the advantages of high compatibility and expandability. At the same time, the test system of the invention, which adopts a virtual device technology, can test characteristic parameter output by the wind turbines on line.

The invention discloses a tyre rolling resistance testing method and a chassis dynamometer. The tyre rolling resistance testing method comprises that: the chassis dynamometer performs reverse drag test on a tyre in a whole vehicle testing state to obtain a reverse drag resistance; the chassis dynamometer performs no-load test to obtain the internal resistance of a drum; and the chassis dynamometer calculates the rolling resistance of the tyre of the tested vehicle according to the reverse drag resistance and the internal resistance of the drum, wherein the rolling resistance of the tyre is the difference obtained by subtracting the internal resistance of the drum from the reverse drag resistance. The whole vehicle is tested by adopting the chassis dynamometer, and the rolling resistance of the tyre of the tested vehicle can be obtained, so that the influence of uncertain factors such as external environment, human operation and the like on the vehicle power test is reduced, the testing result is accurate, and the method is simple and convenient to operate and easy to implement.

The invention relates to a test system for a central processing unit (CPU) module. The system comprises a computer test host and a test device of the CPU module, wherein the computer test host accesses a CPU state register on the to-be-tested CPU module and executes test programs due to the fact that a universal serial bus (USB) data line penetrates through the test device of the CPU module. The test device of the CPU module comprises a test interface of the CPU module, USB debugging sub-interface, a power control circuit, a USB main interface test circuit, an external expansion bus test circuit, an input/output (IO) test circuit, an Ethernet interface test circuit, and a clock backup power test circuit. The test system not only achieves a test for quality of the CPU module, but also can locate specific faulty lines and chips. By means of the power control circuit, delayed electrifying protection of the to-be-tested CUP module and a power short circuit test can be achieved, and therefore hot plugging in the test process is achieved. The whole test system is simple in structure and convenient to operate.

The invention relates to a full automatic adjustment and test system for a liquid crystal display, comprising an industry control PC, a safety test system connected to the industry control PC, a power tester, a signal generator and a burning control card, wherein the safety test system, the power tester, the signal generator and the programming control card are respectively connected to the liquid crystal display to be tested, and the system adopts the industry control PC as the core thereof, controls the safety test system, the power tester and the signal generator needed by the test by the serial port communication of the industry control PC, and realizes the functions of automatic color gradation and language selection, HDCP burning, DDC burning, DDC detection, and the like by the parallel port communication of the industry control PC and the burning control card. The system has the advantages that full automatic test and burning can be carried out during the production of the liquid crystal display, and the production efficiency and the product quality are improved.

The invention relates to a shock absorber with dynamically adjustable damping. The shock absorber can be taken as an instrument shock absorber with dynamically adjustable damping, a power test platform base shock absorbing device and the like, belonging to the applicable technical field of mechanical vibration isolation, damping devices and the like. In the invention, the damping can be changed by the change of air pressure in an elastic corrugated pipe air bag of the shock absorber. The elongation and bending deformation of the elastic corrugated pipe air bag is the elastic bending deformation generated at the local part of the wave crest and the wave trough circle of the elastic corrugated pipe air bag instead of the elongation deformation of the whole rubber material, the elastic corrugated pipe air bag is very small in deformation resistance, sensitive to the air pressure change, rapid in dynamic reaction and high in dynamic control precision, and the driving force of the elastic corrugated pipe air bag does not need to overcome the rubber elastic force; the elastic corrugated pipe air bag only can expand axially but cannot expand in the radial direction, needs small air flow and has the characteristics of small duty ratio and power/mass ratio and low power consumption; and spiral springs with different rigidities and the elastic corrugated pipe air bag are combined for use, so that the shock absorber has better buffer function when being impacted.

The invention discloses a method and system for detecting a video/audio signal circuit board. The method comprises the following steps: A, placing at least two video/audio signal circuit boards in a test frame of a test system, opening a power test voltage, and inputting multiple kinds of signals corresponding to a TV mode or game mode; B, acquiring the image signal of LVDS format (low voltage differential signaling), audio signal, voltage and current output by the video/audio signal circuit board, comparing with the parameters stored in the test system, and comparing the image signal of LVDS format according to pixels of three primary colors to judge whether the image signal is in a preset normal threshold range; and comparing the audio signal according to the frequency characteristic to judge whether the frequency and signal-to-noise ratio are in the preset normal threshold range; and C, testing the key function and software version of the video/audio signal circuit board, and finally displaying a corresponding test report. According to the invention, a plurality of circuit boards with video/audio signal function can be quickly and accurately detected, and the product detection efficiency is improved.

The invention discloses a fan authentication test system analysis platform. For fan authentication test analysis software developed based on FAMOS, BLADED and MATLAB, five modules, namely a data analysis module, a power test module, a performance test module, a load test module and a system identification module are distinguished; mainly aimed at professional equipment based on GL/IEC standards, data formats and IEC test standard specification requirements are tested; and according to the GL/IEC standards, a test report is automatically made. The platform can realize not only functions of test data calibration, captured matrix analysis, sector screening, scattered point curve graph analysis, load rain-flow analysis, time-domain spectral analysis, test and simulation analysis comparison, theoretical simulation model system identification and the like but also automated generation of a fan performance test analysis report, a power test analysis report and a load test analysis report in a GL-D professional format. Moreover, the wind generator unit authentication test data processing is more systematized and modularized.

The invention discloses a large simulation test system for simulating combined effects of earthquakes, waves and ocean current, belonging to the technical field of a marine structure power test. The simulation test system comprises a test wave gutter channel, an absorption wave-maker device, a test water circulating device, an adjustable speed block platform, an earthquake simulation device, a two-way flow simulation device and a waterproof sealing device, wherein the upper plane of a vibration table body of the earthquake simulation device is parallel and level to the bottom plane of the test wave gutter channel; the waterproof sealing deice is arranged between the periphery of the upper plane of the vibration table body and the bottom plane of the test wave gutter channel; the absorption wave-maker device is arranged at the initial end of the test wave gutter channel; a flow making pump of the two-way flow simulation device is connected with an initial-end flow equalizing box and a tail-end flow equalizing box through a pipeline. The system is complete in test simulation function, different input excitation test conditions of the marine structure under combined effects of various loads can be simulated, the test simulation of the earthquakes, the waves and the ocean current is in full-digital control, and the large simulation test system is high in control accuracy and diverse in test function.