JPH0243229B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an intrusion monitoring device that monitors the surrounding area of a surveillance target area, and particularly relates to an intrusion monitoring device that monitors the surrounding area of a surveillance target area, and in particular, uses an intrusion sensor of a passage door into the area to detect a coincidence detection signal of a coincidence detection circuit. The present invention relates to a monitoring device that prevents unauthorized passage by outsiders by maintaining an invalid state for an appropriate period based on the above-mentioned coincidence detection signal and unlocking the passage door based on the coincidence detection signal.

[Prior art]

Conventionally, this type of monitoring device includes a plurality of intrusion sensors installed so as to cover the surrounding area of the area to be monitored, a card reader installed at the entrance side of the passage door into the area to read the cards of passersby, and the above-mentioned sensor. It has an alarm output circuit that issues an alarm upon detection of any one of the plurality of intrusion sensors, and disables the intrusion sensor on the passage door for a predetermined period based on the data read by the card reader. At the same time, the passage door is configured to be in an unlocked state.

In this way, conventional monitoring devices install a single card reader on the entrance side of a passage door, and forcefully invalidate the detection results of the intrusion sensor for a predetermined period of time based on the data read by the card reader and release the passage door. Since the card is locked, even after the person who inserted the card into the card reader passes through the entrance/exit, the intrusion sensor on the passage door will continue to be disabled and the passage door will remain unlocked. This had the disadvantage that there was a risk of illegal passage of outsiders.

[Summary of the invention]

The present invention has been made in view of the above points, and includes card readers provided on both sides of the entrance and exit of the passage door, and based on the data read by each card reader, the intrusion sensor of the passage door section is set to be enabled or disabled. The present invention proposes a monitoring device that appropriately performs control over traffic doors and unlocks or locks passage doors.

[Embodiments of the invention]

FIG. 1 is an installation layout diagram showing an embodiment of the present invention;
FIG. 2 is a circuit diagram showing an embodiment of the present invention.
In each of the above figures, the monitoring device according to the present invention includes card readers 3 and 4, which are installed at the entrance and exit of a passage door 2 formed in a part of a fence 1, and which magnetically read magnetic cards of passersby. , a data memory 5 in which the passerby's card reader is stored in advance, and a data memory 5 provided corresponding to the card readers 3 and 4, and a comparison between the read data of the card readers 3 and 4 and the card reader of the data memory 5; Coincidence detection circuits 6 and 7 detect a coincidence, and when a coincidence detection signal is sent from one of the coincidence detection circuits 6 and 7, a start signal _Ss is output, and then the other coincidence detection circuit 7 , 6 outputs a stop signal S _r when a coincidence detection signal is sent from the switching circuit 8 , and outputs control pulses S ₁ , S ₂ of a predetermined width set by the start signal S _s , one-shot multivibrators 9 and 10 that stop outputting the control pulses S ₁ and S ₂ in response to a stop signal S _r ; and the fence 1
If any of the plurality of intrusion sensors A to F installed to cover the surrounding area detects an intrusion, an alarm is issued, and if the one-shot multivibrator 9 outputs a control pulse _S1 , an alarm is issued. It is comprised of an alarm output circuit 11 that disables only the output of the intrusion sensor A in the passage door 2 section, and a lock control circuit 12 that controls unlocking or locking of the passage door ₂ based on the control pulse S2. be done.

The switching circuit 8 is provided corresponding to the coincidence detection circuits 6 and 7, and includes RS flip-flops 20 and 21 to which coincidence detection signals are input from the coincidence detection circuits 6 and 7;
A pair of AND circuits 22, 23, 24, 25 receive the output from 21 and the coincidence detection signal from the coincidence detection circuits 6, 7, respectively; It is formed by OR circuits 26 and 27 which output the logical sum of outputs.

One shot multivibrator 9 of the above
sends out a control pulse _S1 with a length (usually 30 seconds) corresponding to the time required for a passerby to pass through the detection range of the intrusion sensor A installed on the second part of the passage door, and The vibrator 10 is
A control pulse of a length (usually 10 seconds) corresponding to the time required for a passerby to pass through the passage door 2 is sent out.

In addition, each one-shot multivibrator 9,
10 can also be configured with a single one-shot multivibrator if control pulses of the same length are sent out.

The alarm output circuit 11 includes an AND circuit 30 that disables the output of the intrusion sensor A by the control pulse _S1 from the one-shot multivibrator 9.
, an OR circuit 31 that outputs an output when any of the intrusion sensors A to F outputs an output, and the OR circuit 31
The RS flip-flop 32 is activated by the output of the manual switch 33 and stopped by the output of the manual switch 33;
It is composed of a bell 34 and an alarm display 35 which issue an alarm when the flip-flop 32 is activated. The lock control circuit 12 is provided on the passage door 2, and mainly uses an electric lock, an electromagnetic opening/closing lock, or the like.

Next, the operation of the above-mentioned monitoring device will be explained. First, when a passerby enters the monitored area from outside,
A card is inserted into a card reader 3 outside the passage door 2 and read by the card reader. This read data is compared with the card reader output from the data memory 5 by the coincidence detection circuit 6, and if a coincidence is detected, a coincidence detection signal is sent to the switching circuit 8. The switching circuit 8 activates one of the RS flip-flops 21 in response to the coincidence detection signal, and inputs the activation signal S _s to the one-shot multivibrators 9 and 10 through the AND circuit 23 and the OR circuit 26. The one-shot multivibrator 9 outputs a control pulse _S1 in response to the upper activation signal _Ss , and the AND circuit 30 in the alarm output circuit 11 disables the output of the intrusion sensor A of the passage door 2 section. The other one-shot multivibrator 10 outputs a control pulse _S2 to the lock control circuit 12 to bring the passage door 2 into an unlocked state. Next, after the passerby enters the inside of the passage door 2, he inserts his card into the card reader 4, and this read data is input to the match detection circuit 7, where it is compared with the card reader in the data memory 5 and a match is detected. If so, a coincidence detection signal is sent to the switching circuit 8. In the switching circuit 8, since the RS flip-flop 21 is in the operating state, the AND circuit 25 satisfies the logical sum and outputs it, and inputs the reset signal S _r to each of the one-shot multivibrators 9 and 10 through the OR circuit 27. By doing so, the invalid state of the intrusion sensor A is canceled, and the passage door 2
is locked again.

When a passerby wants to go outside of the monitored area, he or she first inserts a card into the card reader 4 inside the passage door 2, and then inserts the card into the card reader 3 after going outside the passage door 2. . The operations before and after the card is inserted into the card readers 3 and 4 are the same as when entering the monitored area.

Next, another embodiment according to the present invention will be described based on FIG.

In the figure, the present invention adds a traffic control device 13 to the embodiment shown in FIG. , an AND circuit 41 that takes the logical sum of the respective coincidence detection signals, and a traffic instruction circuit 42 that instructs the priority order of traffic based on the output of the AND circuit 41. Regarding the above priority order of passing, it is possible to give priority to whichever card reader 3 or 4 inserted the card earlier, or if cards are inserted into card readers 3 and 4 at the same time, it is possible to give priority to whichever card is inserted into card reader 3 or 4 at the same time. They may be given priority or may be allowed to pass at the same time.

However, the traffic control device 13 in this embodiment is not required when dedicated passage doors are provided for entering and exiting the monitored area, respectively.

In the above embodiment, the card readers 3 and 4 are formed using a magnetic reading method, but other than this method, various methods compatible with the encryption writing method of the card may be used. It is also possible to use a PIN number system using 10 keys, or other identification methods such as palm prints or fingerprints. It is also possible to use a card before passing through a passage door, and after passing, to operate a button or a person detector instead of a card reader.

In addition to the light beam type, the above-mentioned intrusion sensor may be an infrared, microwave, or ultrasonic detection type, or an electric field or magnetic field detection type, or the intrusion sensor may be installed in double layers around the fence. . The passage door may be manual or automatic.

〔Effect of the invention〕

As explained above, the present invention provides card readers on both sides of the entrance and exit of a passage door, and controls the intrusion sensor of the passage door section to be enabled or disabled based on the data read by each card reader. Since the configuration is adopted to perform control to unlock or lock the passage door, the intrusion sensor is disabled and the passage door is unlocked at an appropriate period corresponding to the traffic condition at the passage door. This has the effect of accurately preventing unauthorized passage of outsiders.

[Brief explanation of the drawing]

FIG. 1 is an installation layout diagram showing an embodiment of the present invention;
FIG. 2 is a circuit diagram showing one embodiment of the invention, and FIG. 3 is a circuit diagram of another embodiment of the invention. Note that the same reference numerals in each figure indicate the same or corresponding parts. 1...Fence, 2...Passage door, 3, 4...Card reader, 6, 7...Coincidence detection circuit, 8...Switching circuit, 9, 10...One-shot multivibrator, 11...Alarm output circuit , 12...Lock control circuit, A to F...Intrusion sensor, _S1 , _S2 ...Control pulse.

Claims (1)

[Claims] 1. In an intrusion monitoring device that is provided with a plurality of intrusion sensors so as to cover the surrounding area of the area to be monitored and issues an alarm based on the detection signals thereof, each of which is installed at the entrance and exit of a passage door into the area. a card reader provided to read the passerby's card; a data memory in which card data of the passerby is stored in advance; a match detection circuit that detects a match by comparing the numbers, and outputs an activation signal when a match detection signal is sent out from either of the match detection circuits, and then a match detection signal is sent out from the other match detection circuit. a one-shot multivibrator that outputs a control pulse of a predetermined width set by the start signal and stops outputting the control pulse in response to the stop signal; If any of the multiple intrusion sensors detects an intrusion, an alarm is issued, and if a control pulse is output from the one-shot multivibrator, an alarm output that disables only the output of the intrusion sensor at the passage door. An intrusion monitoring device comprising: a circuit; and a lock control circuit that controls unlocking or locking of a passage door based on the control pulse. 2. The switching circuit includes an RS flip-flop corresponding to the two coincidence detection circuits, a pair of AND circuits each receiving an output from the RS flip-flop and an output from the coincidence detection circuit, and a pair of AND circuits each receiving an output from the RS flip-flop and an output from the coincidence detection circuit. 2. The intrusion monitoring device according to claim 1, characterized in that the intrusion monitoring device is constituted by respective OR circuits that output an output based on a logical sum input from the circuit. 3 The above-mentioned one-shot multivibrator outputs a control pulse to the alarm output circuit with a length corresponding to the time required for the passerby to pass through the detection range of the intrusion sensor on the pass door, and Claim 1 or 2 is characterized in that it is constructed of two one-shot multivibrators each outputting a control pulse to be outputted to a lock control circuit with a length corresponding to the required time. Intrusion monitoring device. 4. A traffic control device comprising an AND circuit that takes the logical sum of the outputs from the two coincidence detection circuits, and a traffic instruction circuit that instructs traffic priority based on the output of the AND circuit. An intrusion monitoring device according to any one of claims 1 to 3.