Single door magnetic detector based on three-axis acceleration

Abstract

The invention discloses a single door magnetic detector based on three-axis acceleration. The detector comprises a central processing unit 1, a three-axis acceleration sensor 2, a 433-Mhz transmit-receive unit 3 and a power supply management unit 4. The detector is characterized in that when the three-axis acceleration sensor 2 detects that the acceleration in any direction of x, y and z changes, the three-axis acceleration sensor 2 calculates and reports acceleration change information to the central processing unit 1, the central processing unit 1 is wakened and records data after receiving the information, the moving direction is obtained in comparison of received data and historical data, the result is sent to the 433-Mhz transmit-receive unit 3 according to the consistent protocol, and the 433-Mhz transmit-receive unit 3 broadcasts the information through radio frequency. The power supply management unit 4 detects the electric quantity of itself while normal electric power supply is provided for the system, when the electric quantity is lower than or about to be lower than a threshold value, the power supply management unit 4 reports the information to the central processing unit 1, and the central processing unit 1 broadcasts the information through the 433-Mhz transmit-receive unit 3 according to the consistent protocol.

Description

technical field [0001] The present invention relates to the field of security technology, the field of triaxial acceleration technology, in particular to the technical field of door magnetic devices, in particular to a single door magnetic detector device based on triaxial acceleration. Background technique [0002] As one of the most common security detection devices, the wireless door magnetic device is mainly used to detect the open or closed state of the door. When the door is opened to a certain distance, the wireless door magnetic device sends a signal to the security host, or local alarm, etc., to achieve security. The effect of the alarm. [0003] In the existing door sensors, whether it is a wired door sensor or a wireless door sensor, it basically consists of two parts: the "door sensor body" and the "magnetic strip". There is a magnetically sensitive special device (reed switch) in the door sensor. When a magnetic strip is within the sensing distance of the reed ...

AI Technical Summary

Problems solved by technology

[0004] The traditional door magnetism sensor and the magnetic strip are separated, and are usually placed on the door frame and the door respectively. The installation is cumbersome, which is not conducive to the overall appearance. In particular, the separation and attraction of the magnetic strip is not directional, and the door cannot be accurately identified In addition, due to the characteristics of magnetic attraction, the door sensor is susceptible to electromagnetic interference from magnetic objects, false alarms, etc.

Images