JPH01156900A - Guard system - Google Patents

Abstract

PURPOSE:To prevent the presence of each sensor from being known, and to facilitate to capture an illegal invader during guard by being equipped with an action confirming device or a threatening device consisting of an indicating lamp or a sound generator at a crime prevention detector, and providing a selection control means to arbitrarily select and control the driving of the device at a central supervision panel. CONSTITUTION:During a normal guard, respective detectors 2 are successively called from a central supervision panel 1 by means of address boring by using an ordinary transmitting means, and the condition of a sensor 21 is returned to the central supervision panel 1. The central supervising panel 1 displays an alarm to a displaying/operating part 12 according to the condition of the sensor 21, and drives the alarm display device of the action detector 2 as needed. An alarm display device 5 can be the indicating lamp such as an LED or a buzzer which can be also used for the threat against the invader, and the both can be used together. Thus, the presence of the sensor 21 cannot be known during non-guard, and the capture of the illegal invader can be facilitated during the guard.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a security system in which various security detectors are connected to a central monitoring board via a common transmission line.

[Conventional technology] As a mechanical security system for buildings, etc., a unique address is set for a terminal to which various sensors are connected, and signals are exchanged with each of the above sensors by address polling etc. from a central monitoring board via a digital transmission path. For example, Japanese Patent Application Laid-open No. 136891/1983 discloses a device that displays an alarm. That is, as shown in FIG. 4, a bidirectional transmission path 3 extends from the information path control means 2 connected to the central monitoring device 1, and a plurality of transmitter devices 4 are connected to this transmission path 3. has been done. In addition, an intrusion detector 5 is connected to each transmitter device 4, respectively.

The central monitoring system R1 is equipped with an information processing device consisting of a microcomputer, etc., and performs address polling on each transmitter device 4 according to a predetermined procedure, checks the status of the intrusion detector 5, and issues an alarm via the alarm display device 7 when an abnormality occurs. This is to display a warning.

[Problem to be solved by the invention] In such a security system, it is necessary to maintain high reliability at all times, so it is desirable to perform periodic inspections. This is done by driving the It is desirable to be able to confirm that the sensor has been activated at the location where the sensor is installed, and for this reason an operation indicator light or a sound generator may be provided.

However, there are cases where it is not necessarily desirable to operate these indicator lights or sound generators during security. In other words, if the lights are on when security is released in the daytime, the location of each sensor will be inadvertently notified to a third party, and there are problems such as making it difficult to catch illegal intruders while security is on. Ta.

[Means for Solving the Problems] The present invention provides crime prevention detectors such as window glass breakage sensors, human body detection sensors, and window opening/closing sensors that have unique addresses, and a common bidirectional device to which the detectors are connected. In a security system equipped with a transmission line and a central monitoring board connected to the line and transmitting and receiving information to and from the security detector using digital signals, an operation check consisting of an indicator light or a sound generator for the crime prevention detector is performed. Alternatively, the above-mentioned problem can be flexibly dealt with by providing an intimidation device and a selection control means for arbitrarily selecting and controlling the operation confirmation or drive of the intimidation device.

[Operation] The drive of the alarm indicator provided in each sensor section can be selected and set to be interlocked or uninterlocked.

[Example] Next, a detailed explanation will be given based on examples.

FIG. 1 shows each security detector and an example of its connection, and FIG. 2 shows its circuit block.

In Figure 1, 1 is the central monitoring board, 2 is the window opening/closing detector 1
Various detectors such as a human body detector and a window glass breakage detector are shown, and these various detectors 2 are connected to a pair of transmission lines l extending from a central monitoring board 1. These detectors 2 are installed at all locations that require security, such as windows or entrances of buildings, and each detector 2 is provided with an alarm indicator 5, respectively.

FIG. 2 shows a circuit block of such a security system.

The central monitoring board 1 includes a central processing unit 10 and a RAM.

Each of them includes a storage device 11 such as a ROM, a display/operation section 12, and a transmission circuit 13.

Each of the various detectors 2 is provided with a transmission control circuit 20 that exchanges signals with the central monitoring board 1 via the transmission line 1, a sensor 21, an address setting section 22, and an alarm indicator 5.

During normal security, the central monitoring board 1 sequentially calls various detectors 2 by address polling using the -m transmission means, and the status of the sensor 21 is checked by the central monitoring board 1.
Send it back to

In the central monitoring panel 1, an alarm is displayed on the display/operation section 12 according to the state of the sensor 21, and the alarm indicator of the motion detector 2 is driven as necessary. The alarm indicator 5 may be an indicator light such as an LED or a buzzer that can also be used to intimidate intruders, or both may be provided together.

Such control of the alarm display 5 can be programmed in advance by operating the operation unit 12 of the central monitoring panel 1 so that it is activated only during test processing, for example.

FIG. 3 shows a flowchart in such a test mode of the present invention. During the test process, steps (B), (C), and (D) are followed by turning on the operation confirmation light of the motion detector 2. If the printer is equipped with a printer, the type and address of the sensor are printed out [step (g)] and further displayed on the display window of the central monitoring board 1.

When a signal to start security is received during such a test, the process moves from step 2) to step (su), where the test process is interrupted or terminated [step (o)], and a mode for issuing a threatening alarm during security is set. When held, the movement moves from step (S) to step (N), and the threat device of the motion detector 2 is activated.

The start or stop of security can be selected from the central monitoring panel 1, and it is usually configured so that it can also be done remotely; for example, it can be set to be done at the entrance when the last person leaving the building exits. can.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the security system of the present invention, FIG. 2 is a circuit block thereof, FIG. 3 is a flowchart of the system of the present invention, and FIG. 4 is a diagram showing a conventional example. DESCRIPTION OF SYMBOLS 1... Central monitoring board, 2... Security detector, Meng... Transmission line, 5... Alarm indicator, 10... Central processing unit, 20... Transmission control circuit, 21...・Sensor patent applicant Nittan Co., Ltd.

Claims (1)

[Claims] Crime prevention detectors such as window glass breakage sensors, human body detection sensors, and window opening/closing sensors that have unique addresses, a common bidirectional transmission line to which the detectors are connected, and a digital signal that is connected to the line. In a security system equipped with the above security detector and a central monitoring board that exchanges information,
The crime prevention detector is equipped with an operation confirmation or intimidation device consisting of an indicator light or a sound generator, and the central monitoring panel is provided with selection control means for arbitrarily selecting and controlling the operation of the operation confirmation or intimidation device. security system.