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Working principle of walkthrough metal detector door

Working principle of walkthrough metal detector door

Views: 414 Author: Site Editor Publish Time: 2017-08-25 Origin: Site

The working principle of the walkthrough metal detector  door generated by the crystal oscillator 3.5-4.95M sine oscillation,  frequency divider is divided into about 7.8K sine wave, the transistor and the coil after the power amplifier input gate (7 area) large coil for electromagnetic emission, 1-6 zone coils are received separately. After receiving, the received signal is compared with the reference signal. After the change, the output level of the acquisition card is changed. The CPU scans the 6-position acquisition card data in 300 milliseconds to determine the location of the metal and outputs the display.

 

Second, the door composed of a large coil, 6 small coil, compensation coil and graphitesupplie composition.the chassis structure security door suppliers.

 

Third, the detection process CPU detection → a group of infrared is blocked → to detect whether the acquisition card data changes → alarm → detect another group of infrared → reset re-detection.


What we talked above are basical principle which most walkthrough metal detector manufacturers will adide  to make door frame for security.


work principle of walkthrough metal detector

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Tel: 0086-0512-36807196
Phone: 0086-18912653120

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