A few reasons for false alarms and missed alarms of the detection systems

I. First of all, the security device in the supermarket will generate false alarms generally refers to the radio frequency (8.2 megabytes) detection system, which triggers the alarm by receiving an 8.2 megabyte signal.

 

2. The probability of false alarms of EAS AM security gate s is much smaller than that of radio frequency. Firstly, acoustic magnetic and radio frequency work differently. The acoustic magnetic is generated by the tuning fork resonance of anti-theft devices and tags, which greatly reduces Device false positive rate.

 

There are two factors for the false alarms of acoustic and magnetic equipment. 1. (Circuit interference) The requirements of the acoustic and detection system will be higher. It must be a 220V 50HZ single phase. There is also other electrical equipment that may cause changes in hertz and phase and cause the equipment to generate false alarms or malfunction.

 

2.  Now many foreign clothing factories and luggage factories will sew anti-theft labels into the products during the production process, which also causes domestic customers to have magnetic strips inside the clothing bags purchased from abroad or online. When the magnetic stripe is not demagnetized, it passes the sound magnetic anti-theft device to generate an alarm. If a similar situation occurs, the store clerk can direct the customer to the cashier to demagnetize the product.

 

Because radio frequency technology is widely used in civilians, the probability of radio frequency signals received by radio frequency immobilizers will also be very high. If it is close to 8.2 megabyte, it is possible to trigger the alarm of the immobilizer, which is usually called a false alarm.