JP3091590B2 - Alarm device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm device mainly for detecting an illegal intruder who has entered a predetermined security area in a non-contact manner and blinking an indicator light or sounding a buzzer.

[0002]

2. Description of the Related Art In recent years, mechanization of security has been rapidly promoted.
In terms of firefighting, the installation of fire alarm equipment, fire prevention equipment, evacuation equipment, etc. is required by law, and the number of buildings equipped with intrusion alarm equipment for crime prevention is increasing. For example, a security system for collecting and monitoring such information is provided, or a contract is made with a security company that performs nighttime security through an online system. This online security system
Alarm devices are installed at required places to set each security area, and if a human body enters the security area illegally,
An infrared sensor or an ultrasonic sensor of the alarm device detects this illegal intruder in a non-contact manner, and transmits an alarm signal from a transmitter to a security company through a public communication line or a dedicated communication line.

When guarding a relatively large area such as in a building, it is common to set a plurality of guard areas in a building, and a guard company sends a warning signal from any of the guard areas. Although it is possible to determine whether the alarm has been issued, it is not known which alarm device in the alert area issues the alarm. Therefore,
An alarm is displayed by an indicator light or a buzzer or the like provided on each alarm device, so that when a guard of a security company patrols, the alarm device that issues an alarm on the spot can be identified. Further, this warning display is displayed by the time required for the guard to reach the guard area by the notification of the warning signal, for example, 30 seconds.
An apparatus has been devised which automatically cancels the alarm after a lapse of an alarm time set to ４０40 minutes and does not require a recovery operation.

[0004]

In the above-mentioned alarm device,
It is possible to determine which alarm device is issuing the alarm by turning on or flashing the indicator light or sounding the buzzer, but it is necessary to know when and how the illegal intruder entered and escaped. Can not. For this reason, there is a problem that it is difficult to determine an appropriate pursuit and an intention to intrude illegally, and that it is difficult to take appropriate security measures thereafter.

SUMMARY OF THE INVENTION Accordingly, it is a technical object of the present invention to provide an alarm device capable of clearly displaying an alarm indicating the elapsed time from the point of detecting an illegal intruder with a simple and inexpensive configuration.

[0006]

According to the present invention, as a technical means for achieving the above-mentioned object, an alarm device is constituted as follows. In other words, it is difficult to
Of abnormal sound or warning area due to human body behavior
An alarm determination circuit that detects the presence of a human body that has invaded in a non-contact manner and outputs an alarm signal, and measures a certain alarm time from the input of the alarm signal, and outputs an alarm display signal within this alarm time. And this alarm display signal
After the alarm signal is input,
Each time a predetermined time elapses, a different alarm display signal
It is characterized by comprising an elapsed time determining means for changing, an alarm display unit such as an indicator lamp or a buzzer, and a display control circuit for driving and controlling the alarm display unit in response to the change of the alarm display signal.

[0007]

When a human body illegally enters the security area, the human body, for example, a passive infrared detection sensor of the alarm determination circuit detects the human body without contact and outputs an alarm signal. Elapsed time determination means measures a certain alarm time from the time when the alarm signal is input. The alarm time is set, for example, to a time required from when the alarm signal is notified to when the guard arrives. The elapsed time determination means sequentially changes the alarm time according to the elapsed time from the input point of the alarm signal.
Output the alarm display signal to be changed. This alarm display signal
After the input time of the alarm signal,
Each time the fixed time elapses, it changes sequentially as a different alarm display signal.
Become For example the number of pulses per a certain time sequentially changed as increase One not a single. The display control circuit controls the display lamp of the alarm display unit to blink more and more, for example, at regular time intervals, in response to a change in the alarm display signal. Therefore,
At the time when the security guard patrols, the warning device that has issued the warning signal can be identified by the blinking of the indicator light, and the elapsed time from the point of detecting the illegal intruder can be clearly determined by the number of times of the blinking. Then, by comparing the number of times of blinking of the indicator lamp of each alarm device that has issued the alarm, it is possible to detect the intrusion route of the illegal intruder.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. In FIG. 1 showing a block configuration of an embodiment of the present invention, an alarm determination circuit (1)
Is equipped with a human body detection sensor such as a passive infrared detection sensor or an ultrasonic sensor that converts the fluctuation of incident infrared rays from the set alert area into an electric signal, and determines the presence or absence of a human body in the alert area without contact Then, an alarm signal is output when the presence of a human body is detected. In the case where there are a plurality of illegal intrusion routes into the caution area, the above-mentioned human body detection sensors are required by the number of the illegal intrusion routes. Therefore, as the alarm determination circuit (1) in such a case, A configuration in which an abnormal sound generated when an illegal intruder breaks glass or a door in order to intrude into a security area is detected by a sound detection sensor, or a change in air pressure in a room caused by the occurrence of the abnormal sound is detected as a pressure. What is necessary is just to make it the structure detected by a change detection sensor.

The elapsed time discrimination section (2) counts a fixed alarm time from the time of input of the alarm signal from the alarm judgment circuit (1), and counts the elapsed time from the input point of the alarm signal within the alarm time. It outputs an alarm display signal which changes sequentially according to the time, and is composed of a time limit timer circuit (2a), a display signal generation circuit (2b) and an AND gate circuit (2c).

The time limit timer circuit (2a) starts counting a certain alarm time from the time when the alarm signal is input from the alarm determination circuit (1). Outputs the display section signal. The warning time is set to a time required for the guard to reach the guard area by the notification of the warning signal, for example, 30 to 40 minutes. The display signal generation circuit (2b) starts measuring time from the rising of the display section signal input from the time limit timer circuit (2a), that is, the display signal which changes sequentially according to the measured time when the alarm signal is generated. Output. Then, in the AND gate circuit (2c), the logical product of the display section signal of the timed timer circuit (2a) and the display signal of the display signal generation circuit (2b) is obtained and output as an alarm display signal.

The alarm display section (4) displays an alarm by a display lamp such as an LED or a buzzer. The display control circuit (3)
Based on the alarm display signal from the elapsed time determination unit (2), drive control is performed so that the indicator lamp of the alarm display unit (4) blinks or a buzzer sounds. Further, an alarm signal from the alarm determination circuit (1) is transmitted from the alarm output circuit (5) to a receiver such as a security company through a public or dedicated communication line.

Next, the operation of the embodiment will be described in detail with reference to the timing chart of FIG. When an alarm signal is output from the alarm determination circuit (1) as shown in FIG.
This alarm signal is transmitted from the alarm output circuit (5) to a receiver such as a security company through a communication line. At the same time,
The time limit timer circuit (2a), as shown in FIG.
In response to the input of the alarm signal, the timer starts measuring a certain alarm time (T) and outputs a high-level display section signal.
The display signal generation circuit (2b) starts timing in synchronization with the rise of the display section signal, and as shown in FIG.
A display signal in which the number of pulses increases one by one according to the elapsed time from the start at every fixed time (t), for example, every five minutes is output. Then, a logical product of the display signal and the display section signal is obtained by the AND gate circuit (2c) and output as an alarm display signal.

The display control circuit (3) drives and controls the alarm display section (4) based on the alarm display signal from the elapsed time determination section (2). For example, when the alarm display section (4) is constituted by an indicator light, the indicator light is controlled to blink as shown in FIG.
a) is continued for the alarm time (T) measured. Therefore, at the time when the guard patrols by the warning signal, the warning device that issued the warning signal can be clearly identified by the blinking of the indicator light, and the time since the detection of the illegal intruder by the blinking number of the indicator light You can know the time. In the above example, when the number of blinks is “3”, it means that the time of 15 minutes or more and 20 minutes or less has elapsed since the detection of the illegal intruder. Further, for example, when the number of blinks of the alarm device installed on the second floor of the building is “4” and the number of blinks of the alarm device installed on the fourth floor is “3”, the moving route of the unauthorized intruder is the second floor. It can be seen that the building reached the fourth floor through the third floor.

Here, the drive control of the alarm display section (4) by the display control circuit (3) is performed by intermittently performing the blinking operation of the blinking number at that time within a fixed time (t) of each display section at a fixed time interval. If you repeat it, you can see it immediately when the guards patrol. When the alarm display section (4) is configured by a buzzer, the display control circuit (3) may be configured to sequentially change the tone of the buzzer based on the alarm display signal to control the operation.

When it is desired to know in detail the elapsed time since the detection of the illegal intruder, the alarm display section (4) is constituted by using a plurality of display lights or display lights having different emission colors. do it. FIG. 3A shows an example of the display state of the green LED, and FIG. 3B shows the display state of the red LED. And the green LED,
The number of blinks is increased by one every one minute, and the number of blinks is controlled to be repeatedly displayed from 1 to 9 times, and the red LED is displayed by increasing the number of blinks by one every 10 minutes. If controlled, the number of blinks of the red LED is displayed in units of 10 minutes, and the number of blinks of the green LED is displayed in units of one minute. Therefore, the elapsed time in units of two digits can be visually recognized at a glance. In this case, as shown in FIG.
After the upper-order green LED turns off, the lower-order red L
If the ED is turned on, visual recognition becomes easy. Along with this, it is necessary to output an alarm display signal that changes every minute from the elapsed time determination unit (2).

It should be noted that the present invention is not limited to the above-described embodiment, but can include various modifications without departing from the scope of the claims. For example, in the above-described embodiment, a case has been described in which the timed timer circuit (2a) that starts measuring a fixed delay time when an alarm signal is input starts counting the alarm time in synchronization with the rise of the alarm signal. The timing of the alarm time may be started in synchronization with the fall of the signal.

[0017]

As described above, according to the alarm device of the present invention, an alarm signal obtained by detecting an abnormal sound caused by a human body that has entered a guard area or an action caused by an intruder to enter the guard area. And output a warning display signal within the warning time , and output the warning display signal within the warning time.
After the input time, a predetermined time has elapsed from the input time
Each time as a different alarm display signal.
The alarm display section such as an indicator light or buzzer changes the alarm display signal.
Drive control in accordance with the
The number of times the indicator light blinks in the
Can display an alarm by means of an intermittent sound or the like so that the alarm device that issued an alarm signal when the guard patrols and the elapsed time from when the device detects an illegal intruder can be clearly identified. Further, by comparing each alarm display of each of the alarm devices installed at a plurality of places, it is possible to determine an intruding route or an escape route of an illegal intruder, and to perform appropriate tracking of an illegal intruder and security measures. In addition, since only the drive control of the existing alarm display unit is changed, and no special configuration is added, the configuration is simple and inexpensive.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a timing chart of the above.

FIG. 3 is a timing chart of another embodiment of the present invention.

[Explanation of symbols]

 1 alarm judgment circuit 2 elapsed time judgment unit (elapsed time judgment means) 3 display control circuit 4 alarm display unit T alarm time

Claims (1)

(57) [Claims] 1. A person for invading a predetermined security area
Abnormal sound generated by body action or intrusion into the caution area
An alarm determination circuit that detects the presence of the human body in a non-contact manner and outputs an alarm signal, and measures a certain alarm time from the input of the alarm signal, and outputs an alarm display signal within the alarm time.
And outputting the alarm display signal at the time of inputting the alarm signal.
Later than each other every predetermined time from the time of input.
Elapsed time discriminating means for sequentially changing as different alarm display signals, an alarm display section such as a display lamp or a buzzer, and a display control circuit for driving and controlling the alarm display section in response to the change of the alarm display signal. An alarm device, characterized in that: