JPS61169996A - Security system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a security system that is less prone to erroneous operations and false alarms when entering and exiting a building.

[Conventional technology]

In a security system where the operation switch for setting security alert and cancellation is inside the alert area, when starting security, the operator must set the operation switch to the alert side before exiting the alert area, so the sensor must be installed once. In addition, when entering the building, you must open and close the door where the sensor is installed, enter the restricted area, and then turn the operating switch to the release side. Therefore, there is a need for an alarm system that prevents sensors installed on doors and the like from emitting alarms when entering and exiting the building.

A conventional security system that takes the above points into account is shown in FIG. As shown in Figure 2, 1 is an operation switch installed in the warning area and sets the warning and cancellation, 3 is a door on which a sensor 2 is installed, and the sensor 2 detects the opening and closing of the door 3. issue an alarm. The guard area covers the entire indoor area, and to start guarding, it is necessary to operate the operation switch 1 to the guard side, move along the dotted line, open and close the door 3, and exit the room.

3 to 6 show each side of the time chart at the time of security start operation of the conventional security system described above, and in FIG. 3, when the operation switch 1 is turned to the security side (ON), the preset timer will mask the signal of the sensor 2 for a time T1, and the alarm will start when the time T1 has elapsed.By opening and closing the door 3 and exiting during this time, it is possible to prevent the alarm from the sensor 2. can.

In Fig. 4, after operating the operation switch 1 to the warning side (ON), the sensor 2 detects the opening and closing of the door 3, and this is used as a trigger to start the warning, and the opening and closing of the door 3 is detected. The state of alert will not be reached until then.

In addition, in FIG. 5, by combining the things in FIGS. 3 and 4, after the operation switch 1 is turned to the alert side (ON), the timer detects whether the time T1 has elapsed or the opening/closing of the door 3. The alarm is started when the device 2 detects the detection.

[Problem that the invention seeks to solve]

However, in the conventional system shown in FIG.

During the T1 time of the timer, the signal from the sensor 2 is masked, which creates a blank time for security purposes, so it is dangerous to set the T1 time long, and if the T1 time is set short, the operator can It was difficult to set the T1 time on the timer, as there was a risk that the time would run up and a warning would be activated before exiting.

Furthermore, in the system shown in FIG. 4, there is a risk that the alarm will not be activated if the sensor 2 is defective and does not operate. Furthermore, with the method shown in Figure 5, if the door 3 is opened or closed by mistake, or if several people try to exit in succession, the door 3 should be opened and closed once as shown in Figure 6. Then, since the alarm starts, there is a problem in that when the door 3 is opened afterwards, an alarm is issued.

The present invention has been made to solve the above-mentioned conventional problems, and can eliminate the security blank time, as well as prevent false alarms such as when several people leave in succession. The purpose is to provide a security system that can.

[Means for solving problems]

In the present invention, the signal of the sensor is masked until the condition is completed for a predetermined 72 hours after operation or human detection, or until the end of opening/closing of the door, and the predetermined TI is
(>T2) An automatic or manual switch means that is effective only during this time is provided near the door.

[Effect]

Since the switch means stops masking the signal of the sensor after a short 72 hours or after opening/closing the door, an alarm can be issued even within the long T1 time, and security blank time can be eliminated. Further, even if several people leave the room in succession, false alarms can be prevented by operating or manipulating the switch means.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 7, reference numeral 4 denotes a remote switch provided near the door 3 within the security area, and the other configurations are the same as the conventional one.

FIG. 8 shows a time chart of the above configuration. First, when the operation switch 1 is turned to the alert side (ON) at the time point (■), the preset timer T1 starts operating, and at the time point (■), the remote switch 4 is operated. Then, the preset timer T2
starts operating, and during T2 (<Ti time, sensor 2 of door 3
signals are masked and remoted. If door 3 is opened or closed at point ■ within these 12 hours, a warning will be activated and timer T2 will be activated.
will also be reset. Also, if the door 3 is not opened or closed after 72 hours, the alert will be activated at that point, and T'2 will be activated again.
If the door 3 is not closed even after a period of time has elapsed, an alarm is prepared. Even if you are on alert, press the remote switch 4 as shown in ■
If you operate the timer T2, the timer T2 will start operating again, and if it is within 12 hours, you can open and close the door 3 to leave the room as shown at time (3). Also, even after 24,112 hours have passed, door 3 remains closed.
If it is not closed, we will be on alert. Also, as shown in point 1 ■■, the door 3 can be opened and closed as many times as desired by operating the remote switch 4 within the timer T1 time, and the timer T2 is retriggerable and starts anew each time the remote switch 4 is operated. be done. After time T1 has elapsed at time point (2), timer T2 does not operate even if the remote switch 4 is operated at time point (2), and when door 3 is opened or closed at time point O, an alarm is prepared.

In this system, when the operation switch 1 is turned to the warning side (ON), the warning is started immediately without waiting for the operation of the remote switch 4 and the opening/closing of the door 3 at time ■■, and the timer T1 is activated.
During the time, the door 3 may be opened and closed repeatedly by operating the remote switch 4 as at time ■■.

FIG. 1 shows a specific configuration of the security system of the present invention, in which the sensor contact 5 is a normally closed contact, the remote switch contact 6 is a normally closed push button contact, the operation switch contact 7 is a normally closed contact, and the contact 5 is a normally closed contact.
~7 are all grounded on one side, and the input side is a pull-up resistor 8
~ Grouped up by lO, input capatufa 11-13
is input.

When the operation switch contact 7 is opened, a timer TI (startup input, positive output) 21 is activated, and the remote switch contact 6 becomes valid for a time T1. Timer T2 (with multiple rising inputs, negative output, and reset) by opening remote switch contact 6
22 is activated, and the sensor contact 5 is activated by the AND gate 23.
signals can be masked. When the sensor contact 5 is opened, the 7 trigger float 7'17 is set, but the timer T
2, 22 are in operation, so the sensor 2 of the processing device 24 is operated manually.
Also, by closing sensor contact 5, shift ring 70 knob 17 is cleared, and at the same time timer T2.2 is cleared.
2 is also reset. This signal is input to the processing device 24 from the door opening input 26. The processing device 24 outputs (alarm etc.) 28 under the above conditions. Note that the operation switch 1 and the remote switch 4 may be not only switches or key switches, but also a card or a numeric keypad. Furthermore, automatic switching means may be used instead of the remote switch 4.
In this case, it is sufficient to use a sensing means to detect when a person approaches the door and activate the contact point 6.Also, although the specific configuration has been shown using hardware, the CPU can handle the input from the contact point. The above functions may also be processed by software within the CPU. or.

In Figure 1, 14 is an inverter, 15 and 18 are capacitors, 16 and 19 are resistors, 20 is an AND gate, and 2
7 is an operation switch contact input.

〔Effect of the invention〕

As described above, in the present invention, the sensor is effective only for a predetermined T1 time after the operation switch is operated or a person is detected, and until the predetermined T2 (<Tl) time after the operation or until the end of opening/closing of the door. By installing an automatic or manual switch means near the door to mask the signal of the door, it is possible to eliminate security blank time, and if the switch means is operated automatically or manually before opening and closing the door. To prevent an alarm from being erroneously issued even when several people leave the door in succession after opening and closing the door by mistake. Also, since the warning starts even during the above T1 time, it is necessary to worry about the setting of the T1 time and the location of the operation switch.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram of the security system of the present invention, Fig. 2 is a schematic configuration diagram of a conventional system, Figs. 3 to 5 are time charts of each side of the conventional system, and Fig. 6 is a false alarm of the conventional system. Time chart for the case. FIG. 7 is a schematic configuration diagram of the security system of the present invention, and FIG. 8 is a time chart of the security system of the present invention. 1...operation switch, 2...sensor, 3...door%
4...Remote switch, 5...Sensor contact, 6
...Remote switch contact, 7...Operation switch contact, 17...Free lag flon! , 20.23...AND gate, 21...Timer TI, 22...Timer T2, 24...Processing device. Patent Applicant: Sogo Security Security Co., Ltd. Figure 3 Figure 4 Figure 5 Planning and Housing Regulations / Figure 7 Figure 8

Claims (1)

[Claims] (1) An operation switch that is installed in the warning area to perform warning and release operations; a sensor that detects the opening and closing of the door and issues an alarm; Automatic or manual masking of the sensor signal until the completion of either the predetermined T2 time after detection or completion of the opening/closing of the door, and valid only within the predetermined T1 (>T2) time after the warning operation of the operation switch. A security system comprising a switch means and configured to enter a warning state immediately after the warning operation of the operation switch or after the opening/closing of the first door after the warning operation of the operation switch is completed.