A low power consumption tamper alarm device

Abstract

The invention discloses a low-power anti-dismantling alarm device. The device comprises a first Hall switch 1, a second Hall switch 2, a first linear Hall element 3, a second linear Hall element 4, a switch tube 5, a microprocessor 6, a first magnet 7 and a second magnet 8. The low-power anti-dismantling alarm device, in case of external magnetic field interference, can accurately determines whether an anti-dismantling device is dismantled or there is interference of an external magnetic field according to the change of two linear Hall output values, even if in case of the external magnetic field, the reliability of an anti-dismantling function can be ensured, and dismantling prevention is realized in a real sense. At the same time, the linear Halls only work in an interference condition, therefore, the average power consumption is quite low, thus the device provided by the invention can be applied to a product energized by a battery and can work reliably in a complex external environment.

Description

technical field [0001] The invention relates to a low power consumption anti-demolition alarm device, especially applied to battery-powered products such as wearable labels. Background technique [0002] With the rapid development of RFID technology, wearing tags are widely used in various industries: [0003] Real-time positioning supervision system for personnel in prisons, mental illness and other industries; [0004] Hospital neonatal monitoring management system; [0005] Confidential unit foreign visitor management system; [0006] Real-time positioning system for personnel in monitoring areas, exhibition areas, and other places; [0007] Special personnel safety management system for important meetings and events. [0008] Wearing tags on these occasions cannot be disassembled without authorization, and anti-dismantle (alarm) technology is particularly important. The main problems to be solved are power consumption, reliability, environmental adaptability and sen...

AI Technical Summary

Problems solved by technology

However, this utility model uses a magnet module and a switch-type Hall sensor. The switch-type Hall sensor can only detect whether the magnetic field exists, and cannot output the value of the magnetic field strength. There is no content in the article that can detect the strength of the magnetic field.

Moreover, when the external magnetic field strength reaches the magnetic field strength provided by the magnet module in the text, even if the device is opened, it will not alarm, so the real anti-dismantlement cannot be achieved.

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