38results about How to "Avoid inaccurate testing" patented technology

The invention relates to the field of motor performance testing, in particular to a motor performance testing device with a torsion adjusting function. The invention solves the technical problems that the torque load cannot be changed, and the measured data is less, so that the problems of the motor cannot be found in time, and the unqualified motor leaves the factory. According to the technical scheme, the motor performance testing device with the torsion adjusting function comprises a supporting plate, a first fixing strip, a first fixing plate, a fixing mechanism and the like; and first fixing strips are fixedly connected to the front and rear portions of the right side of the upper surface of the supporting plate, a first fixing plate is fixedly connected between the inner side faces of the two first fixing strips, and the fixing mechanism is arranged on the right side of the first fixing plate. According to the invention, the fixing mechanism is arranged, so that inaccurate measured data caused by vibration of a to-be-tested motor in the testing process is avoided; and by arranging a torsion adjusting mechanism, inaccurate testing of the to-be-tested motor due to less measured data is avoided.

An embodiment of the invention discloses a fish-eye lens MTF test method, which is characterized by calculating an optical center and radius of an effective light-emitting zone obtained when a sphere light source fisheye lens camera module shoots a sphere light source; according to the optical center and the radius, determining a detection zone in a preset field of view, the shape of the detection zone being determined according to position relation between the detection zone and the effective light-emitting zone; and finally, testing MTF of a fish-eye lens in the detection zone. The method prevents the phenomenon of MTF test inaccuracy caused by scene distortion due to distortion of the fish-eye lens, improves MTF test accuracy of the fish-eye lens, helps users to judge the imaging quality of the lens more accurately and visually, helps to improve camera quality detection accuracy and improves MTF test efficiency of the fish-eye lens. Besides, the embodiment of the invention also provides a corresponding realization device, thereby further enabling the method to have higher practicality. The device has the corresponding advantages above.

Embodiments of the present application provide a mobile terminal testing method, device, storage medium, and mobile terminal. The method includes: responding to the first boot instruction triggered by touching the power button of the mobile terminal, waking up the processor of the mobile terminal, and The processor detects whether the pre-started software version in the mobile terminal is a test software version; if the pre-started software version in the mobile terminal is a test software version, then detects whether there is an external power supply for powering the mobile terminal; The external power supply for power supply starts the boot program of the mobile terminal, so that the mobile terminal enters the power-on state; in the power-on state, the mobile terminal is tested based on the test software version. In the embodiments of the present application, by using an external power supply to test the power supply of the mobile terminal, the problem of inaccurate testing caused by using a fake battery to test the power supply of the mobile terminal is avoided, and the accuracy and efficiency of the mobile terminal test are improved.

The invention relates to a device and a testing method for accurately measuring the heat of dissolution of energetic materials, belonging to the field of physical and chemical testing. Including furnace body, connecting wire and recorder, also includes reference unit and test unit; test unit includes rotating cover, sealing cover, connecting rod, reaction pool, turbine blade, ejection pellet; the present invention avoids puncture, friction and other dangerous operations, while solving the problem of inaccurate testing caused by the shrinkage of the isolation film, the device and method improve the efficiency of testing heat of dissolution of energetic materials and reduce the risk of testing.

The invention discloses a motor life testing tool, which comprises: a base for placing the motor; a pressing mechanism, including a connecting rod and a tension spring, for pressing the motor on the upper surface of the base; a detection circuit connected to the motor The input and output ends are used to monitor the speed and working current of the motor in real time; the fixed end of the connecting rod is rotatably fixed on the base, one end of the extension spring is fixed, and the other end of the extension spring is fixed on the On the connecting rod, have the free end of the connecting rod press the motor towards the base. The invention designs a motor life testing tool, which can reliably fix the motor, and monitor the speed and working current of the motor in real time, and can accurately analyze the working performance of the motor through the detection data, so as to judge the working life of the motor, and can Effectively avoid the inaccurate test caused by noise interference caused by non-motor body vibration or welding wire falling off during the motor life test.

The invention relates to a thermal resistance test circuit and method for a reverse conducting IGBT. The circuit comprises a control circuit, a gate voltage source, a test current source and a heatingcurrent source. The gate voltage source, the test current source and the heating current source are connected with the control circuit. The gate voltage source, the test current source, the heating current source and the control circuit are connected with the reverse conducting IGBT to be tested. The control circuit controls the test current source, the heating current source and the gate voltagesource to provide reverse test current, forward heating current and gate voltage respectively. When heating is carried out, after the reverse conducting IGBT to be tested is in forward conduction, power heating is carried out. When testing is carried out, the reverse conducting IGBT integrates a reverse diode, and reverse test current is input to record the cooling curve of the reverse conductingIGBT to be tested. A thermal resistance value is acquired according to the cooling curve and a temperature-sensitive coefficient. The problem of inaccurate test caused by a rebound phenomenon duringa forward test is avoided. The thermal resistance test is highly accurate.

The invention discloses a crop monitoring system based on an unmanned aerial vehicle and a method of the crop monitoring system. The crop monitoring system based on the unmanned aerial vehicle comprises the unmanned aerial vehicle and a sensor. A material holding box is arranged on the lower part of the unmanned aerial vehicle, the material holding box is internally provided with a controller, a hydraulic pump is arranged on the lower left part of the controller, a hydraulic rod is connected to the right side of the hydraulic pump, a vertical rod is arranged on the right side of the hydraulicrod, a side groove is formed in the outer surface of the vertical rod, a rotary motor is arranged on the right side of the vertical rod, a rotary roller is connected to the right side of the rotary motor, a winding device is arranged on the right side of the rotary roller, a base is installed on the lower part of the sensor, an extracting pipe is arranged on the left side of the base, a spring isinstalled on the inner surface of the extracting pipe, and a cross plate is connected to the lower part of the spring. The crop monitoring system based on the unmanned aerial vehicle has the main characteristics that the crop is monitored by using the arrival and departing of the unmanned aerial vehicle, manpower using is saved, monitoring devices can be transported to areas where human beings arenot prone to arriving, and the working efficiency is greatly improved.

The invention relates to the technical field of high temperature gate bias test, and discloses a high temperature gate bias test method, computer equipment and storage medium of a SiC MOSFET device. When testing the electrical parameters of the device, if the measurement of the SiC MOSFET device is not completed in time, the stress interruption time of the SiC MOSFET device can be evaluated. Stress time as a function of time, and stress interruption time to obtain additional stress time for SiCMOSFET devices. Apply a bias stress with additional stress time to the SiC MOSFET device to restore the threshold voltage on the SiC MOSFET device to the preset threshold, and then measure the SiC MOSFET device in time to ensure that the measured threshold voltage at this time can express Real-world drift of SiCMOSFET devices.