1, function and working principle of wired door magnetic sensor
In the smart home access control system, the door magnetic switch is responsible for whether the door magnetic is energized, energized with magnetic (closing the door) and demagnetized (opening the door). The door magnetic switch is installed on the door and door cover, and the switch is installed in the house, which is used in conjunction with the automatic door closer. Generally, it can bear the tensile force of 150kg.
Wired door magnetism is more hidden for embedded installation, and can sense the opening and closing of doors and windows, which is suitable for wooden or aluminum alloy doors and windows to send wired normally closed/normally open switch signals. Door magnetism is used to detect doors, windows, drawers, etc. Be illegally opened or moved. It consists of a wireless transmitter and a magnetic block. The door magnetic system is actually the same as the bed magnetic principle. Take door magnetism as an example.
2. The function and working principle of wireless door magnetic sensor.
The wire door magnetic sensor is used to monitor the opening and closing state of the door. No matter what reason the door is opened, the wireless door magnetic sensor will immediately send out specific radio waves and give an alarm to the host in the distance.
The wireless door magnet consists of a wireless transmitting module and a magnetic block. There is a "steel spring tube" component at the two arrows of the wireless launch module. When the distance between the magnet and the steel spring tube is within 1.5cm, the steel spring tube is disconnected. When the distance between them exceeds 1.5 cm, the steel spring tube will close, causing a short circuit, and an alarm signal will be sent to the host when the alarm indicator light is on.
? Application of door magnetic system in real life
This is a common secret door magnet on the market. One end without wires has magnets, reed switches and other components hidden in the low end with wires. When the magnet is close, the wires output a closing signal, and when the magnet is far away, the two wires output an opening signal.
One end without wire is installed at the top of the door, and the other end with wire is installed on the door frame. When the door is closed, the two ends just overlap and approach. There are also some square door magnets on the market, which are suitable for surface mount occasions and used in doors and windows.