JPH03157797A - Security system using breathing sound sensor - Google Patents

Abstract

PURPOSE:To detect an object even at the time when it does not move at a speed within a prescribed range by using a breathing sound sensor as a sensor for security or one sensor. CONSTITUTION:A small-sized electret type microphone is used as the breathing sound sensor and is set in the vicinity of a metallic dial part where valuables are stored, and the signal of breathing sound of a trespasser is connected to a control box for security by a wireless transmitter, and the signal is transmitted to a prescribed alarm or a proper post when being discriminated as the breathing signal sound by an electronic circuit. When a trespass detector consisting of the other sensors is used together, this system can cope with conditions of trespassers in a wide range. Thus, trespassers are detected independently of the speed of their motion.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a security sensor.

In conventional technology, infrared, ultrasonic, and magnetic wave systems have been used as the main security systems. However, these sensors have a serious drawback in that they cannot detect objects unless they move at a speed within a predetermined range.

(5! The problem that Ming is trying to solve) The speed range within the detection area of an object that can be conventionally sensed was 6 inches/' seconds to 30 inches/' seconds, but these detection speeds Illegal trespassers who are familiar with the range often choose a slower direction to invade because other speed bands, especially the faster side, make louder intruding noises. The purpose of this is to detect in this case.

(Means for Solving Problem c) As an adjunct to the invention, a feature of the present invention is to use a well-known conventional security sensor or a respiratory air sound sensor as one sensor. It is something to do.

If the target is only particularly slow intrusions, it is sufficient to FM the security instrument equipped with only the respiratory sound sensor of the present invention, and it can be used to detect intrusions within the speed range described in iii and at other slow speeds. If the detection target range is a breathing air sound sensor and a conventional sensor, such as an infrared sensor, a long-sound liquid sensor, or an electromagnetic wave sensor, it is possible to detect intruders in all target speed ranges. Can be detected.

(For FT) This system electrically detects the breathing sound of an intruder, separating it from other noises, and targets repeated breathing sounds that are not directly related to the speed of the intruder's movements. be.

Typical human breathing sounds were collected using a Niclet-type microphone and analyzed using a spectrum analyzer. The results are shown in Figure 1 <42. It turned out to be a special signal tone with a peak at +6 mHz. This wave pattern is that of a specific person's breathing, and varies depending on each individual's personality and physical condition. The results of the preparation and collection are shown.

What can be determined from this result is that at least one inch of similar waveforms can be found within each waveform group. In other words, a human respiratory breath sound sensor combined with an electronic circuit that determines that it is an intruder's breath U when two or more roughly similar waveforms occur in succession uses conventional infrared, ultrasonic, and electromagnetic waves. It has a function that can compensate for the growing point of the type sensor.

(Example) A small Nirekret type microphone is attached as a respiratory sound sensor near the metal dial part housed in one item, and the signal of the intruder's call and sound is sent to the wireless transmitter for security purposes. It is connected to a control box, and when it is determined by the electronic circuit to be a breathing signal sound as described above, the signal is sent to a predetermined alarm or to an appropriate department.

It goes without saying that if an intruder detector made of other sensors is used together, it is possible to deal with a wider range of intruder situations (conditions).

(Effects of the Invention) According to the present invention, it is possible to detect an intruder almost regardless of the speed of the intruder's movement, so it can be applied even in a speed range that cannot be adequately controlled with conventional sensors. , has industrial value.

[Brief explanation of the drawing]

FIG. 1 shows a spectrum obtained by analyzing the waveform of respiratory air, and FIG. 2 shows the waveform of respiratory air under various conditions.

Claims (1)

[Claims] A security system characterized by using a respiratory sound sensor as at least one of the sensors.