Displacement anti-theft alarm method

Abstract

The invention discloses a displacement anti-theft alarm method. In a normal situation, an interrupt detection method is used to monitor the displacement of a monitored item; when a displacement sensordetects the movement of the item, an interrupt signal is generated, a microcontroller receives the interrupt signal through an interrupt interface so as to start a pre-alarm process; after entering the pre-alarm process, a timed detection method is used to monitor the displacement of the monitored item; and if the fact that the item is still moving is determined through the timed detection method, an alarm process is started, and otherwise, the pre-alarm process is exited and an interrupt detection method is re-used to monitor the displacement of the monitored item. According to the displacement anti-theft alarm method, two detection methods adopted in the prior art are improved, so that the displacement alarm mechanisms are more accurate and timely.

Description

technical field [0001] The invention relates to the technical field, in particular to a displacement anti-theft alarm method. Background technique [0002] With the continuous progress of society and the continuous development of science and technology, people's living standards have been greatly improved. Due to the continuous development of the economy, people's awareness of the protection of private property is constantly increasing, thus putting forward new requirements for anti-theft measures. [0003] There are two detection methods used in traditional displacement detection alarms: [0004] The first is the method of interrupt detection: that is, when the item moves, the displacement sensor in the item sends a high-level signal, and the interrupt pin of the system MCU (microcontroller) detects the signal sent by the sensor as an alarm. [0005] The second is the method of timing detection: the system MCU (microcontroller) regularly inquires the state of the displace...

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Problems solved by technology

[0007] Although the first method is more flexible, it can give an alarm in time when the measured item moves, but since the movement of the item may be caused by the collision of other items, rather than being moved outside the safe area that the user thinks, in this case The following does not mean that the item is stolen

This may cause the system microcontroller to make wrong judgments and cause inaccurate alarms.

[0008] Although the second method can reduce the detection sensitivity by adjusting the detection time interval, there may be a certain delay when the object is detected for the first time when it is moved, resulting in a delay in the alarm

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