JPH09138894A - Burglar/disaster prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To recognize the kind of sound, to execute simultaneous prevention of crime and disaster and to eliminate the need for complicated wiring work by detecting abnormality by signal analysis of sound waves. SOLUTION: When signals which are sound-collected by a microphone 1 are analyzed with a recognition device 2 using a processor and invasion from outside or fire is sensed, an alarm 3 transmits the signal to a necessary monitor part 6. A warning to an invader by sound from the recognition device 2 or the monitor part 6 can be given by using a speaker 5. The speaker 5 can be used with the microphone 1. Furthermore, a supersonic wave at the time of metallic destruction can be sensed from recognition by the pattern of the breaking sound of glass, the recognition of the periodical sound of footsteps, sound transmitted from a wall, a pillar and a floor, pressure fluctuation owing to the opening/closing of a door and a window and the level change of outdoor sound.

Description

Detailed Description of the Invention

[0101]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crime prevention and disaster prevention device in a business establishment or a house.

[0092]

2. Description of the Related Art Conventionally, as a crime prevention device, a pyroelectric sensor,
An abnormality was detected using a proximity switch, electric circuit disconnection detection, etc.

[0093]

However, in that case, there were many malfunctions, and the system was installed in a system different from that for disaster prevention such as fire, and a large amount of cost was required for wiring work.

[0093]

By detecting an abnormality by analyzing a sound wave signal according to claim 1, the type of sound can be recognized, crime prevention and disaster prevention can be performed at the same time, and complicated wiring work is unnecessary. You can

[0056]

[Function] Captures sound waves inside a building with a microphone,
The processor analyzes and finds the cause of the sound. Also, reliability can be improved by associating with another abnormality detection sensor.

An example of the principle of the crime prevention and disaster prevention device using the sound wave analysis will be described with reference to the drawings. The signal collected by the microphone 1 is analyzed by the recognition device 2 using a processor to prevent intrusion or fire from the outside. When the alarm is detected, the alarm device 3 sends a signal to the necessary monitoring unit 6. In addition, using the speaker 5, the recognition device 2 or the monitoring unit 6
It is also possible to give a warning to the intruder by voice from.
The speaker 5 can be shared with the microphone 1.

The abnormality recognition function of the processor is determined by its software, but the following items are conceivable from the analysis of the sound itself. Depending on the location where the microphone 1 is installed and its frequency characteristics, it is recognized by patterns such as the sound of glass breaking, the recognition of periodic sounds such as footsteps, the sound transmitted from walls, pillars, the floor, etc., and the pressure caused by opening and closing doors and windows. It is also possible to detect the ultrasonic wave when the metal is broken from the fluctuation and the level change of the outdoor sound.

Further, if the measurement function using sound is used, the change in the room temperature using the change in sound velocity due to the change in temperature is measured, the Doppler effect using a speaker or the detection of a moving object using a plurality of microphones, the use of a plurality of microphones It is also possible to measure the position of a sound source and its movement.

[0099]

[Effects of the Invention] Any other abnormality detection sensor can be used in combination, and it is expected that the effects of reduction of malfunction, increase of sensitivity, increase of detection items, etc. can be expected by using mutual relations. For example, a pyroelectric sensor cannot prevent malfunctions due to curtain fluctuations, but in sound movement measurement, it is possible to distinguish from movements of other objects by observing the elapsed time state by a processor. In addition, when an abnormality is detected, the sound can be heard and confirmed directly by the ear, and a voice warning can be issued to the intruder. Installation costs are reduced because no special wiring is required to install the microphone.

[Brief description of the drawings]

FIG. 1 shows an example of the configuration of a crime prevention and disaster prevention device according to the present invention.

[Explanation of symbols]

 1 ・ ・ ・ ・ Microphone 2 ・ ・ ・ ・ Recognition device 3 ・ ・ ・ ・ ・ ・ Alarm device 4 ・ ・ ・ ・ Conventional anomaly detection sensor 5 ・ ・ ・ ・ Speaker 6 ・ ・ ・ ・ Monitoring station

Claims (2)

[Claims] 1. A crime prevention and disaster prevention device characterized by detecting an abnormality by analyzing a sound wave. 2. When an abnormality is detected according to claim 1,
And a crime prevention and disaster prevention device characterized in that an alarm is issued to a necessary place in combination with the operation of another abnormality sensor, and an alarm is issued to an intruder.