Brief introduction of safety products (1)

burglar alarm:

1. Intrusion detector-a device that converts the intrusion information occurring at the protected site into an electronic signal and transmits it to the outside. Commonly known as the probe, also known as the front-end equipment of the alarm.

2. Signal transmission part-also known as channel, is the external transmission channel of detector electronic signal. At present, there are three main transmission methods, namely wired and wireless, and three different transmission methods of borrowed wire:

Wired transmission is also called special line transmission, that is, the alarm signal is transmitted to other places with special wires, cables, optical cables, etc. The advantage is that it has strong anti-interference ability and can prevent damage, and the line can be found immediately when it is short-circuited or broken. The disadvantage is troublesome construction.
The wireless transmission connects the intrusion detector and the wireless transmitter. Once an alarm occurs, it will send a radio signal to the air. The wireless receiver receives a signal and generates an alarm, informing personnel to process it. Its advantages are simple installation, strong maneuverability, multi-point transmission and one-point reception, long control distance and large area. The disadvantage is that it may be interfered by more powerful radio waves, thunder and other stray electricity. Borrowed line transmission telephone lines, power lines, cable TV networks and other public lines can be borrowed for alarm signal transmission. The advantage is that the construction is easy and no special wiring is required. The disadvantage is poor anti-destructive ability.

3. Anti-theft alarm controller-a device that can turn the electronic signal of intrusion information sent from an intrusion detector into an audible and visual alarm signal and display, record and store it. Commonly used are desktop, cabinet, box and wall-mounted. However, generating an alarm sound, displaying the alarm location, and storing and recording alarm information are essential functions