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Alarm system

An alarm system and siren technology, applied in anti-theft alarm mechanical activation, alarm by breaking glass, etc., can solve the problems of expensive, non-transparent price, and inability to attach

Inactive Publication Date: 2010-06-09
IND TECH RES INST
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, this design method cannot accurately determine the cause of the shaking or vibration of the doors and windows and the degree of damage, so the alarm system often produces false alarms.
[0004] As mentioned above, the sensing principle of a general sensor is nothing more than the use of sensing magnetic field, vibration, sound frequency, pressure, etc., although the common pressure sensor can be manufactured by micro-electro-mechanical technology (MEMS) to achieve miniature for the purpose of globalization, but it still has the disadvantages of being non-transparent and expensive
[0005] On the other hand, in view of the fact that traditional sensors are not flexible and cannot be attached to objects with curved surfaces, how to provide a sensor and an alarm system that can improve practicability and functionality has become an important issue

Method used

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Embodiment Construction

[0038] First please refer to figure 1 , the alarm system 100 of an embodiment of the present invention mainly includes a transparent pressure sensor 110 , a processing unit 120 and an alarm 130 . The aforementioned pressure sensor 110 is, for example, a piezoresistive pressure sensor (Piezoresistive Pressure Sensor), which is flexible and coated on the surface S1 of an object G (eg, a glass window surface), and the aforementioned processing unit 120 is The pressure sensor 110 is electrically connected to the alarm 130, and the alarm 130 is, for example, a buzzer.

[0039] When the object G is impacted by an external force, the pressure sensor 110 will change the internal resistance value due to the force. At this time, the pressure sensor 110 will transmit an impact parameter signal to the processing unit 120, and then the processing unit 120 can be based on the The impact parameter signal determines whether to send a corresponding alarm signal to the alarm 130, so as to driv...

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Abstract

The invention relates to an alarm system, which comprises a processing unit, an alarm and a transparent pressure sensor; the pressure sensor is wrapped on the surface of an object and has flexibility; when the pressure sensor is subjected to external force impact, the pressure sensor can transmit an impact parameter signal to the processing unit; and the processing unit transmits an alarm signal to the alarm according to the impact parameter signal.

Description

technical field [0001] The invention relates to an alarm system, in particular to an alarm system with a flexible pressure sensor. Background technique [0002] Generally, a common window sensor (window sensor) is mostly equipped with a microphone on the edge of the door or window, and can convert the sensed sound signal into a corresponding current signal through the microphone. Since the sound of doors and windows being opened or broken has a specific frequency, the sound signal can be converted into a current signal through a microphone, and then the specific frequency signal can be filtered out by a filter, so as to determine whether the door and window is opened or damaged. In addition, it is also possible to judge whether the doors and windows are opened or damaged by detecting the change of the air pressure in the room. [0003] In another known sensing method, two metal wires are arranged adjacent to each other. When the door or window is shaken or vibrated, the two...

Claims

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Application Information

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IPC IPC(8): G08B13/02G08B13/04
Inventor 张家杰侯智升
Owner IND TECH RES INST
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