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Introduction to the composition and principle of the hail impact tester system

Author: Source: Posted On: 2019/9/23 14:38:02

Hail impact tester works:
The air compressor compresses the air to the gas storage tank, an external pressure gauge and a barrel of 25 mm inner diameter, and a gas valve is installed at the joint, which is controlled by a large solenoid valve.
A photoelectric speed measuring device is installed at the front end of the barrel. Adjust the pressure gauge to bring the ice hockey to the required impact speed.
A hockey mold with an inner diameter of 25 mm was produced. The prepared ice hockey is placed in the barrel, the solenoid valve is opened, and the compressed air pushes the ice ball to hit the photovoltaic module at a speed of 23 m/s. After the component is subjected to the impact by the ice hockey, it is judged whether the quality of the component is qualified after visual inspection, I-V test and insulation resistance test.

Functional Overview:
The hail impact tester is specially designed to perform the ice hockey impact test on the solar cell to verify the ability of the battery assembly to withstand the impact of the impact. The sample is placed horizontally on the test platform, and the launching device is placed above the sample to launch the ice hockey from top to bottom. The method of moving the fixed launching device to perform automatic aiming and positioning between different impact points; the device is composed of a sample platform, a numerical control positioning device, an ice hockey launching device, an ice hockey production and storage device, etc.; the sample platform is made of industrial molded aluminum material, and the sample is in The platform is horizontal, the plexiglass shield around the platform prevents test debris; the CNC positioning device is used for the positioning of the launch point, the CNC dual-axis drive, with the light point indicating device, after the positioning and setting of the relevant data, the device automatically moves The muzzle is aimed at the impact point without manual operation; the launching device uses compressed air as the power source, and adjusts the impact speed by adjusting the compressed air pressure. The punching speed is detected by the electronic speed measuring component installed in the launching tube; the device adopts PLC+human machine Interface control, impact point position, impact speed and other values ​​can be used in people The equipment on the machine interface, zero point manual setting, the impact process can be automatically completed by the PLC.

Hail impact tester consists of:

1. Pneumatic launching device: The power source is air. A gas storage device is needed to store the air conditioning pressure. The air pressure change in the launch tube is adjusted by adjusting the air pressure change. Pneumatic launchers require hardware coordination, including high pressure air supply, pressure regulating equipment (pressure regulators and cylinders), air lines and solenoid valves.

2. Mechanical moving device: The microcomputer controls the mechanical transmission device to change the moving position of the tube, and uses the infrared fixed point to do the aiming. The mechanical movement is realized by the stepping motor transmission method. The stepping motor has the advantages of fast and accurate positioning, and can complete the positioning requirement in a very short time. The positioning accuracy is less than 1mm, and the experimental cumulative error is less than 5mm, which is far less than the IEC standard. The required specified position deviation is not more than 10mm to ensure the reliability of the experiment.

3. Sample holder: Design the mechanical moving device and sample holder according to the sample size. The standard size is 2000*1350 (L*H), which covers the effective surface of the component under test in the size of 2000*1350.

4. Speed ​​test device: Before the launch tube, the distance between the two photoelectric sensors is 50cm. Use v=s/t to get the speed, display in real time, and change when the next sample speed is measured. The speed test device includes three parts: a detection sensor, a high-speed response module, and a software module. The system adopts stable photoelectric sensor and programmable controller to realize, and provides HMI human-machine interface as operation terminal, and forms experimental data report with external printer.

 



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