Books that normally go through the borrowing procedures are invalidated by special degaussing equipment, or sent from the anti-theft antenna side, and the borrowing is completed. When the books that have not gone through the normal procedures pass through the exit, the book anti-theft antenna detects the books that have not been degaussed and gives an audible and visual alarm, and the borrower completes the borrowing procedures.
Anti-theft magnetic stripe
Book anti-theft system, that is, once someone tries to take books out of the store without permission, it will notify the system and give an alarm. This fundamentally changed all previous anti-theft systems from passive monitoring to anti-theft, so that anti-theft measures can be implemented on every commodity. The book anti-theft system consists of a detection door, a detector host, a charge-discharge sensor, a return detector and a magnetic stripe.
Detection gate: consists of a transmitting gate, a receiving gate or a transmitting gate and two receiving gates. There is an effective magnetic stripe in this area, and the receiving antenna receives the signal, triggering the detector host to alarm. The detector host and the detector door cooperate to form a system. Charger-desensitizer: used to magnetize or degauss the composite magnetic stripe in the book. Recheck instrument: used to check whether the magnetic stripe in the book is in good condition.
Refer to the above? Baidu encyclopedia-anti-theft magnetic stripe