37results about How to "Meet different test needs" patented technology

The invention discloses a single-phase programmable current source device and a control method thereof. Voltage of a power grid sequentially passes through a circuit breaker, a three-phase input reactor and a three-phase alternating current contactor and then is accessed into a rectifying unit, the rectified voltage is accessed into a three-phase inverter assembly, a double-DSP (digital signal processor) control unit is used for receiving the current waveform parameters sent by a touch display screen or a remote monitoring platform, and adopts a continuous output method, the double-DSP control unit is also used for generating instruction current to drive three groups of inverter assemblies to generate current waveform, the inverter assemblies are used for outputting Hall detection signals and current transformer detection signals and feeding back into DSP controllers, and the input parameters of a current source generation unit are corrected. The single-phase programmable current source device has the advantages that the digital and intelligent functions are realized, and the single-phase programmable current source device is used for performing heat tolerance test on the devices, such as low-voltage switches, circuit breakers, alternating current contactors and fuses.

The invention provides a laminated sheet twist-locking device, comprising a plurality of laminated sheets. The laminated sheets are of a ring shape and are laminated together and connected with pins and retainer rings; each laminated sheet comprises an upper surface, a lower surface and a connecting part for connecting with the upper and lower surfaces; the upper surface is connected with the lower surface of the previous laminated sheet and the lower surface is connected with the upper surface of the next laminated sheet; and the upper surface of the laminated sheet at the topmost end is fixed with a to-be-tested part through a fastener. The laminated sheet twist-locking device does not bright axial and radial constraints to the planetary gear mounting edge of a rotor shaft and is capable of bearing large torque load, so that the correct stressing state of the bolts of the mounting edge is guaranteed; the non-normal damage mode in the testing is avoided and the validity of the testing examination is guaranteed.

The invention relates to an exoelectron testing system and method for a medium protecting film material. At least one circulation period T used for testing is included, and the circulation period T comprises the following voltage application periods of (1) an excitation period Ts, (2) a waiting period Tw and (3) a testing period TR, wherein (1) the excitation period Ts, (2) the waiting period Tw and (3) the testing period TR are carried out consecutively in sequence. Optical signals generated by the working gas discharging process inside a display unit in a detected plasma display screen in the testing period are detected and recorded, the testing voltage difference VD between a scanning electrode Y and a maintenance electrode X when the optical signals generated is obtained simultaneously, the voltage Vw of an internal field in the display unit is calculated and obtained by the equation Vw=Vf-VD, the amount of exoelectrons in the display unit is calculated and obtained through the Vw, and one test of the exoelectrons of the medium protecting film material is completed. The exoelectron testing system for implementing the testing method for the medium protecting film material comprises a drive circuit, a photomultiplier counter tube, an oscilloscope, a computer, a control circuit and a power circuit.

The invention discloses a method for rapidly identifying and screening anti-blight banana seedling. The method comprises the steps of establishment of banana seedling hydroponic system, inoculum preparation and inoculation, daily management of banana seedling, disease situation investigation and grading. Banana seedling stage inoculation and hydroponic identification method can effectively control interference due to differences in soil structure, nutrition, microorganism, etc., during banana seedling stage inoculation identification process, rapidly and accurately identify anti-blight bananaseedling, continuously identify large amount of tissue-cultured banana seedlings in small area, perform multiple times of identification in one year, improve test result reliability, shorten identification period, and save land occupation and test cost.

The invention discloses a vehicle-mounted automobile experimental data acquisition system. A first analog signal acquisition module and a temperature acquisition module are connected with a corresponding sensor in an experimental environment information measuring unit, and the temperature acquisition module and a second analog signal acquisition module are connected with a corresponding sensor in a vehicle information measuring unit to collect vehicle information and experimental environment information and to measure analog signals and temperature signals. A global position system (GPS) information measuring unit collects information of longitude and latitude, vehicles, vehicle accelerated speed and altitude. The collected data are all converted into a controller area network (CAN) data package and transmitted to a host machine computer through a CAN bus and a universal serial bus (USB) to CAN communication module. 12-V working voltage is supplied to the first analog signal acquisition module, the second analog signal acquisition module, the temperature acquisition module and the GPS information measuring unit through a power plug of a cigar lighter. The vehicle-mounted automobile experimental data acquisition system achieves comprehensive acquisition on the experimental information, shortens the experimental time and reduces the experimental cost.

The invention discloses a device and method for static load model tests, belonging to the technical field of geotechnical engineering tests. Design a static load model test device that can be assembled, press the model pile vertically into the soil layer, and carry out the static load model test. The device is composed of a rotary pressurization unit with controllable rotation speed fixed on the model box, a lateral stabilization unit of the pile body, a connection unit and a torque elimination unit. This method is not only suitable for pressing in long and thin model piles, but also suitable for static load test detection of model piles, composite foundations and natural foundations.

The invention discloses a scaling and descaling test platform for a pressure equalizing electrode in a cooling water system in a converter valve. The reagent outlet, the reagent replenishment tank is used to provide chemical reagents for the water storage tank, the liquid outlet of the water storage tank is connected to the gas supply tank, and the gas supply tank is used to change the dissolved gas in the liquid transported by the water storage tank, the liquid outlet of the gas supply tank Connect the water quality parameter detection box, the water quality parameter detection box is used to detect the water quality parameters of the liquid flowing through the water quality detection box, the liquid outlet of the water quality parameter detection box is connected to the liquid inlet of the fouling pipe section, and the scaling pipe section is detachably connected with a piezoelectric pole, the liquid outlet of the fouling pipe section is connected to a descaling device, the descaling device is used to reduce the concentration of scale-causing particles in the liquid, and the liquid outlet of the descaling device is connected to the circuit liquid inlet of the water storage tank. The invention has perfect functions and can meet the requirements of scaling or descaling tests under different conditions.

The invention discloses a locomotive test differential gear case. The locomotive test differential gear case comprises an input shaft, an output shaft, a first planet gear set, a second planet gear set and a speed regulation motor. The input shaft and the output shaft are arranged on the same straight line. The input shaft and the output shaft are rotationally connected. The first planet gear set is arranged on the input shaft in a sleeving manner and used for decreasing speed. The second planet gear set is arranged on the output shaft in a sleeving manner and used for increasing speed. The first planet gear set and the second planet gear set are meshed, and the gear ratios of all stages of the first planet gear set are the same as the gear ratios of all stages of the second planet gear set. The speed regulation motor is arranged on the outer side of a second inner gear ring in the second planet gear set in a meshed manner. When a linear driving test is performed, the speed of the input shaft is decreased through the first planet gear set, the speed of the input shaft is increased through the second gear set, and the condition that the linear driving rotation speed ratio is 1:1 is met. When a bend test is performed, the speed regulation motor is started, and the second inner gear ring is driven to rotate, so that the rotation speed of the output shaft and the rotation speed of the input shaft are in certain proportion under the stacking effect, and the differential ratio needed by the bend test is achieved. A locomotive test table can achieve the effect achieved by the gear case.