JP2002015379A - Wind pressure type abnormality sensing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sense not only instrusion from an openable part such as a door, a window or the like into an independent house, a multiple dwelling house or a store but also instrusion from except openable parts, for example, a wall, the ceiling, and the underground. SOLUTION: This device comprises a wind pressure generation means for forming a fixed wind pressure by discharging constantly the air in a room to the outside, and a change detection means for detecting the change of the wind pressure caused by the instrusion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting a change in wind pressure and detecting an abnormality.

[0002]

2. Description of the Related Art Conventionally, various devices for detecting intrusion have been proposed. These include the following devices. (1) Device to detect opening and closing of doors and windows, etc. (2) Device to detect destruction of window glass. (3) A transmitter / receiver for light beams such as infrared rays is placed, and illegal intruders can pass through and enter between them. The device that utilizes the fact that the light beam is cut off and no longer received

[0003]

In the device described in (1) of the prior art, intrusion is detected in the case of intrusion from a wall, ceiling, or underground, and intrusion from an opening / closing section where the device is not mounted. Can not.

In the device described in (2) of the prior art, if an illegal entry is made from a window glass other than the window glass to which the device is attached, the entry cannot be detected.

The device described in (3) of the prior art can detect a light beam only when an intruder passes through a straight line connecting the transmitter and the receiver.

As described above, in the conventional apparatus, the detection of the illegal intrusion is limited. This makes it impossible for professional trespassers to compete, leading to serious situations such as trespassing into jewelry stores leading to murders.

[0007]

SUMMARY OF THE INVENTION A wind pressure abnormality sensing device according to the present invention comprises: a wind pressure generating means for generating a constant wind pressure by constantly discharging indoor air to the outside; Change detection means for detecting that air has flowed into the room and the wind pressure has changed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a wind pressure type abnormality detecting device according to the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of the present invention. A wind pressure type abnormality sensing device 1 according to the present invention is a wind pressure generating means 2 for generating a constant wind pressure by constantly discharging indoor air to the outside.
And a change detecting means 3 for detecting that a constant wind pressure has changed.

FIG. 2 shows a situation in which a part of the wall has been destroyed by an unauthorized intruder. Since the outside air flows into the room through the hole formed in the wall, the wind pressure generating means 2
The air flow suddenly becomes faster and the wind pressure changes.

The wind pressure generating means 2 uses the sirocco fan 4 to constantly exhaust indoor air to the outside to generate a constant wind pressure.

The change detecting means 3 includes a sensor 5 for constantly measuring wind pressure and a change judging function 6 for inputting a measured value of the sensor 5 and detecting a change.

FIG. 4 shows functional blocks of the above-mentioned change judging function 6. The measurement value input function 7 constantly inputs the measurement value of the sensor 5. Further, the measured value storage function 8 stores the data of the measured value input by the measured value input function 7 for a certain period of time.

The judgment function 9 inputs the fluctuation pattern of the measured values within a certain period of time obtained from the measured value storing function 8. For example, if the fluctuation is significantly large, the change detecting means 3 generates a change in the wind pressure. Accordingly, the wind pressure abnormality sensing device 1 of the present invention senses the occurrence of the abnormality.

[0014]

As described above, according to the present invention, since an abnormality is sensed by a change in wind pressure, the following effects are obtained. In addition to opening and closing parts such as doors and windows, even in the case of intrusion due to the destruction of walls and illegal intrusion from the ceiling and underground, the outside air flows into the room, so the wind pressure changes,
An abnormality can be sensed by the change detecting means.

By creating the sensor and the change determination function as an electronic circuit, the flow of air taken into the wind pressure type abnormality sensing device 1 can be directed upward. For this reason, the change determination function of the present invention can be incorporated in the exhaust device of the household toilet. As a result, installation of the apparatus can be performed at low cost.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a wind pressure type abnormality sensing device.

FIG. 2 is a cross-sectional view of a wind pressure type abnormality detection device when an intruder breaks a wall of a house incorporating the wind pressure type abnormality detection device.

FIG. 3 is a configuration diagram of a wind pressure generation unit and a change detection unit.

FIG. 4 is a functional block diagram of a change detection unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wind pressure type abnormality sensing device 2 Wind pressure generating means 3 Change detecting means 4 Sirocco fan 5 Sensor 6 Change judgment function 7 Measured value input function 8 Measured value storage function 9 Judgment function R Room W Wall

Claims (1)

[Claims] 1. A system comprising: a wind pressure generating means for generating a constant wind pressure by constantly discharging indoor air to the outside; and a change detecting means for detecting a change in wind pressure due to an illegal intrusion. Abnormality detection device