JPH04178586A - Intrusion alarming device - Google Patents

Abstract

PURPOSE:To issue a sound alarm when judgement of existence of a person is placed, by furnishing an infrared sensor, which senses infrared rays emitted from the person, and a judging part to judge existence of person from the output signal of this infrared sensor. CONSTITUTION:When a person intrudes into the covering area of an infrared sensor 2, the infrared rays emitted from the person depending upon the physical temp. are sensed by the infrared sensor 2, and the output signal therefrom is passed to a judging part 3. If judgement is that any person exists, a light emitting alarm part 4 mounted at the part with eye of the casing 1 simulated to a dog figure emits light, while a time measuring part 5 commences counting for ten sec from the time of judgement. If the judging part 3 judges that a person exists still when the time measuring part 5 completes counting ten sec, a sound alarm part 6 emits sounds as if a dog were balking.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an intrusion alarm device that warns of large-scale intrusion around a house.

2. Description of the Related Art In recent years, awareness of crime prevention in the home has increased due to the growth of nuclear families and the decline in social relationships among neighbors, and intruder alarm devices for home use have begun to become popular. A conventional intrusion alarm device will be explained below.

Intruder alarm devices usually use a pyroelectric infrared sensor to detect a person's body temperature and warn of the presence of the person.

By installing a plurality of such intruder alarm devices around a house, it is possible to emit an alarm sound to a person attempting to enter the house, thereby playing a role in preventing crime.

Problems to be Solved by the Invention In such conventional intruder alarm devices, if a person who is not an intruder accidentally enters the detection area of the intruder alarm device for some reason, an alarm sound is suddenly emitted. There was a problem in which a third party who heard the sound mistakenly thought it was an intruder coming.

The present invention solves the above problems, and provides an intruder alarm device that does not suddenly emit an alarm even if a person who is not an intruder accidentally enters the detection area of the intruder alarm device for some reason. The purpose is to provide

Means for Solving the Problems In order to achieve the above object, the intrusion alarm device of the present invention has the following features:
A first means of the present invention includes an infrared detector that detects infrared rays emitted from a person, a determination section that determines the presence of a person from an output signal of the infrared detector, and a determination section that determines that a person is present. a light emitting alarm unit that emits light when the person is present; a time measurement unit that measures a certain period of time from the time when it is determined that the person is present; It consists of an acoustic alarm unit that emits a dog barking sound when a determination is made.

A second means of the present invention includes: an infrared detector that detects infrared rays emitted from a person; a determination unit that determines the presence of a person from an output signal of the infrared detector; and this determination unit determines that a person is present. a distance detection unit that measures the distance to the person when the distance detection unit measures the distance to the person; a light emission alarm unit that emits light when the distance to the person measured by the distance detection unit is greater than a certain value; It consists of an acoustic alarm unit that emits a dog barking sound when the distance is less than a certain value.

Effect: The intrusion alarm device of the present invention has the configuration of the first means described above, so that when the infrared detector detects infrared rays and the determination unit determines the presence of a person, the time measurement unit detects that the time measurement unit is measuring a certain period of time. An alarm is issued by means of a light emitting light, and if the presence of a person is still determined after the end of the measurement for a certain period of time, an alarm is issued by means of an audible sound.

With the configuration of the second means, when the infrared detector detects infrared rays and the determination unit determines the presence of a person, if the distance to the person is greater than a certain value, an alarm is issued by emitting light, If the distance is less than a certain value, an acoustic warning is issued.

EXAMPLE A first example of the present invention will be described below with reference to FIG.

As shown in the figure, a housing 1 made to resemble a dog includes an infrared detector 2 consisting of a pyroelectric infrared sensor, and a determination unit 3 that determines the presence of a person based on the output signal of the infrared detector 2.
A light emitting alarm unit 4 that emits light when the determination unit 3 determines that a person is present is provided in the dog eye portion of the housing l,
A time measurement unit 5 that measures a certain period of time from the time when it is determined that a person is present is connected to the determination unit 3, and when 10 seconds have elapsed from the time when the time measurement unit 5 determines that a person is present, the determination unit 3 detects that a person is present. An acoustic alarm section 6 is provided so as to emit a dog bark such as "woof woof" when it is determined that the dog is present.

To explain the operation in the above configuration, when a person enters the detection area of the infrared detector 2, the infrared detector 2 detects infrared rays emitted from the person due to body temperature, and an output signal is sent to the determination unit 3.
send to Then, when determining that a person is present based on the output signal of the infrared detector 2, based on the temperature difference with the background and the size of the infrared emitter that has entered the detection area of the infrared detector 2, the determination unit 3 determines that a dog is present. At the same time as the light emission alarm section 4 provided in the eye part of the casing 1 made to resemble the above emits light, the time measurement section 5 starts measuring 10 seconds from the judgment point.

Then, when the time measurement section 4 finishes measuring for 10 seconds, if the determination section 3 determines that a person is present, the acoustic alarm section 6 emits a dog's bark such as "woof woof".

Next, a second embodiment of the present invention will be described with reference to FIG.

Note that the same parts as in the first embodiment are given the same numbers and detailed explanations will be omitted.

As shown in the figure, a distance detecting section 7 is provided which detects the distance to the person based on the intensity of infrared rays when the determining section 3 determines that a person is present.

To explain the operation of the above configuration, when a person enters the detection area of the infrared detector 2, the infrared detector 2 detects infrared rays emitted from the person due to body temperature, and outputs an output signal to the determination unit 3.
send to When determining that a person is present based on the output signal of the infrared detector 2 based on the temperature difference with the background and the size of the infrared radiator that has entered the detection area of the infrared detector 2, the determination unit 3 detects the distance detection unit. Step 7 detects the distance to a person based on the intensity of infrared rays. If the distance to the person detected by the distance detection section 7 is farther than a certain value, the light emission alarm section 4 provided in the eye part of the casing made to resemble a dog emits light. Furthermore, if the distance to the person detected by the distance detection section 7 is closer than a certain value, the acoustic alarm section 6 emits a dog bark such as "woof woof".

Effects of the Invention As is clear from the above embodiments, according to the present invention, even if a person who is not an intruder accidentally enters the detection area of the intruder alarm device for some reason, it is possible to detect that the person has entered the detection area. To notify you as a warning, within a certain period of time after entering the detection area, or if the distance to the intruder alarm device is farther than a certain value, a light-emitting alarm will be emitted, and a loud alarm will suddenly sound and the alarm will be activated. It is possible to provide an intrusion alarm device in which a third party who hears a sound is less likely to misinterpret it as the arrival of an intruder.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an intrusion alarm device according to a first embodiment of the present invention, and FIG. 2 is a block diagram of an intrusion alarm device according to a second embodiment of the invention. 2... Infrared detector, 3... Judgment section,
4...Light emission alarm unit, 5...Time measurement unit, 6...Audio alarm unit, 7...Distance detection unit.

Claims (2)

[Claims] (1) An infrared detector that detects infrared rays emitted from a person, a determination unit that determines the presence of a person from the output signal of this infrared detector, and a light that is emitted when the determination unit determines that a person is present. an alarm unit; a time measurement unit that measures a certain amount of time from the time when it is determined that the person is present; An intrusion alarm device consisting of an acoustic alarm unit that emits a sound. (2) An infrared detector that detects infrared rays emitted from a person, a determination unit that determines the presence of a person from the output signal of this infrared detector, and a A distance detection section that measures distance; a light emission alarm section that emits light when the distance to the person measured by the distance detection section is above a certain value; and a light emission alarm section that emits light when the distance to the person measured by the distance detection section is below a certain value. An intrusion alarm system consisting of an acoustic alarm unit that emits a dog barking sound when an intruder is detected.