The invention provides an anti-interference performance test method and system for power supply chips. A power supply with stable voltage is provided for a power supply chip to make the power supply chip work normally under the power supply, and a first voltage waveform curve of the output voltage of the power supply chip is measured; an radio frequency module is provided, the radio frequency module is made to work under a preset frequency and its maximum rated power and put close to the power supply chip, and a second voltage waveform curve of the output voltage of the power supply chip in the process in which the radio frequency module approaches the power supply chip is measured; and the anti-interference performance of the power supply chip is determined according to the first voltagewaveform curve and the second voltage waveform curve of the power supply chip. The test method of the invention is simple, and can evaluate the anti-interference performance of the power supply chip without increasing the cost.

Anti-interference performance test method and system for power supply chips

The invention relates to the technical field of speed sensor test, and provides a speed sensor tester test assembly and a speed sensor tester. The speed sensor tester test assembly comprises a mounting seat, a speed measurement gear, and a driving unit for driving the speed measurement gear, the mounting seat comprises a holding chamber, the speed measurement gear is located in the holding chamber, the driving unit is fixed to a coaming of the holding chamber, and an observation window of the speed measurement gear is arranged on the coaming; and the mounting seat further comprises a sensor mounting plate, and the sensor mounting plate is parallel to an axis of the speed measurement gear. According to the speed sensor tester test assembly, detection is simple and convenient, the speed sensor tester test assembly does not need to be returned to a speed sensor manufacturer, the measurement gear can be separated from the outside world, contact of impurities with the speed measurement gearor wounding by the speed measurement gear are avoided, and the observation window arranged on the coaming can meet observation requirements to master the state of the speed measurement gear at any time, in addition, arrangement of the sensor mounting plate can save the space occupied by the speed sensor tester test assembly.

Speed sensor tester test assembly and speed sensor tester

The utility model belongs to the field of sensor detection, and discloses a speed sensor performance index detection device. The speed sensor performance index detection device comprises a box body whose internal part is provided with a cavity, wherein the box body is internally provided with a horizontally installed spindle, and the spindle is connected to a motor. The speed sensor performance index detection device is characterized in that the spindle is provided with at least two gears, the box body is provided with at least two groups of sensor installation units, and the sensor installation units are arranged corresponding to the gears. Each sensor installation unit comprises a sensor base and a guide rod, wherein the guide rod is vertically installed on the box body and slidably connected with the box body; and the sensor base is arranged outside the box body and fixedly connected with the guide rod. The speed sensor performance index detection device realizes a purpose of simultaneously detecting different sensors through arranging a plurality of gears on the spindle simultaneously; the moving range of the sensor base is restricted by the rotation range of a handle, and sensors do not collide with the gears; the sensor base is pushed to move by adopting a thread, and the sensor base always clings to the thread of a threaded pipe under the action of gravity, thereby being high in control precision of the moving distance of the sensors.

Speed sensor performance index detection device

The invention provides a testing device for quality of a circuit board with function of multiple fields. The testing device comprises a testing box, an RF system which is connected with the side wallof the housing of the testing box and transmits an electromagnetic wave into the testing box, a temperature control system which can adjust and control the inner temperature of the testing box, a bracket for placing a to-be-tested circuit board, a power probe which measures strength of the electromagnetic wave around the to-be-tested circuit board, and a circuit board power supplying and output displaying system. The invention further provides a testing method for the quality of the circuit board with function of multiple fields, wherein the testing device is utilized in the testing method. The testing device and the testing method for testing the quality of the circuit board with function of multiple fields can realize quality testing on the circuit board on condition of different temperatures and different RF interferences.

Testing device and testing method for circuit board with function of multiple fields

The invention relates to a water tank water level sensor testing device and a testing method. The device comprises a testing water tank, a temperature control system, a magnetic field control system and a master controller, wherein at least one water level sensor is arranged inside the testing water tank, the temperature control system is used for controlling the temperature of water inside the testing water tank, the magnetic field control system is used for generating a magnetic field for testing, the master controller is used for adjusting the water temperature and the magnetic field strength inside the water tank, and the master controller is in circuit connection with the temperature control system and the magnetic field control system separately. The quality variation trend of the water level sensors under the combination effect of the high-intensity magnetic field and the temperature field can be simulated, quality changes of the water level sensors generated by the external complex environment effect under the real working condition are researched, the experimental environment temperature and the strength of the experimental radio-frequency interference magnetic field can be controlled, and finally the vehicle-mounted water tank sensor quality is judged according to a diagnosis determination formula.

Water tank water level sensor testing device and testing method

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Speed sensor performance index detection device

Testing device and testing method for circuit board with function of multiple fields

Water tank water level sensor testing device and testing method