JP2002099969A - Picking alarm device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate an alarm prior to the intrusion without permission into a house by another person on the basis of a signal obtained by spectrally analyzing specific vibrations generated according to a picking operation for notify neighboring areas. SOLUTION: This device comprises a sensor part 1 for detecting vibrations generated according to unlocking operation; a wave detector/delay circuit 3 for holding the vibration pulse, obtained by detecting the output of the sensor part 1 for a fixed time; and a counting timer 4 which is set at the generation timing of the output from the wave detector/delay circuit 3 and is reset after a prescribed time. When the output of the wave detector/delay circuit 3 is continued, exceeding the prescribed time counted by the counting timer 4, an alarm time setting timer 5 actuates the alarm 7 within a set time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a picking alarm device for preventing an unauthorized person from entering a house by an unlocking operation using a special tool (hereinafter referred to as picking operation) by generating an alarm sound or the like. About.

[0002]

2. Description of the Related Art Recently, a technique called picking, that is, using a special tool to pry open the lock of an entrance door,
There have been many incidents of intruding into other people's houses without permission and performing theft. It is said that in the houses of victims of this theft, old cylinder locks that can be easily unlocked by picking operations are often used.

[0003]

However, in order to prevent unauthorized unlocking by such a picking operation, it is necessary to replace the cylinder lock with an expensive lock having a complicated structure and to attach a plurality of locks. However, it is necessary to use other locks of different types in combination, and there is a problem that a financial burden is imposed on residents. In the past, various alarm devices have been provided that detect the intrusion of another person into a room by unauthorized unlocking and generate an audible alarm.However, since the alarm is issued after unlocking, it is necessary to avoid theft. Can not.

The present invention solves the above-mentioned problem, and is based on a signal obtained by spectral analysis of a unique vibration wave generated by a picking operation, before unauthorized entry into a house by another person. It is an object of the present invention to obtain a picking alarm device that can generate an alarm and notify the surroundings.

[0005]

To achieve the above object,
A picking alarm device according to the present invention includes: a sensor unit for detecting vibration generated by an unlocking operation; a detector / delay circuit for holding a vibration pulse obtained by detecting an output of the sensor unit for a predetermined time; A timer which is set at the timing of generation of the output from the detector / delay circuit and reset after a predetermined time, wherein the output of the detector / delay circuit exceeds a predetermined time measured by the clock timer. When the alarm is continued, the alarm is set within the set time by the alarm time setting timer. Thus, a person who intends to enter the house without permission by another person can be escaped by unlocking by the picking operation.

The picking alarm device according to the present invention further includes a first ring counter driven by receiving the output of the clock timer, and a first switch receiving the output of the first ring counter includes: The hold time by the detector / delay circuit is randomly changed. This prevents the theft burglar from analyzing the characteristics of the detector / delay circuit and unlocking the detector / delay circuit by operation.

Further, the picking alarm device according to the present invention includes a second ring counter driven by receiving the output of the clock timer, and a second switch receiving the output of the second ring counter includes: The predetermined time measured by the clock timer is randomly changed. As a result, the picking thief analyzes the characteristics of the clock timer and prevents the clock timer from working, thereby preventing the unlocking by the picking operation from being performed.

In the picking alarm device according to the present invention, an external output terminal is provided so that the output of the alarm time setting timer is taken out to the outside. Thus, another alarm device can be connected to generate an alarm sound at a plurality of places at the same time.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a picking alarm device of the present invention. In FIG. 1, reference numeral 1 denotes a sensor unit having a vibration sensor made of ceramic or the like that resonates with vibration, and has a characteristic of resonating in a frequency range of vibration generated by a normal unlocking operation or a picking operation of a cylinder lock.

A low-frequency amplifier 2 for amplifying the minute output of the sensor unit 1 is connected to the sensor unit 1. The low-frequency amplifier 2 is connected to a detector / delay circuit 3 at the next stage. It functions to amplify the output to a level that can be detected. The detector / delay circuit 3 is a low-frequency amplifier 2
The picking vibration generated in accordance with the picking operation is detected by detecting the output of the above and holding a predetermined output pulse obtained by the detection for a certain period of time.

The detector / delay circuit 3 is connected to a clock timer 4. The timer 4 functions to measure the duration from the time when the picking vibration is detected as shown in FIG. That is, FIG.
On timing t of picking vibration as shown in FIG.
The timer starts at 1 and is reset at the off timing t2 in FIGS. 4B and 5B. Reference numeral 5 denotes an alarm time setting timer for operating the siren drive circuit 6 within a set time TA (for example, about 1 minute) as shown in FIG. 5C when the continuation of the picking vibration exceeds the off timing t2. is there.

Reference numeral 7 denotes an alarm device driven by the siren drive circuit 6, for example, a siren. Reference numeral 8 denotes an external output terminal for outputting the output of the alarm time setting timer 5 to the outside. Lights and other sirens can be connected.

The detector / delay circuit 3 is connected to a first ring counter 9 which is triggered by receiving an intermediate output of the timer 4 as shown in FIG.
Connected to the first ring counter 9 is a first switch 10 whose output changes the hold time of the output pulse from the detector / delay circuit 3.

Further, a second ring counter which is triggered by receiving an intermediate output thereof is connected to the timer 4, and the second ring counter 11 is connected to the second timer 11 by the output thereof. A second switch 12 for changing the timing of the timer 4 is connected.

The sensor unit 1 and the second switch 12 are housed in, for example, one case 13 as shown in FIG. The locking pieces 15, 15 are provided integrally. Therefore, this case 13 can be hung by a hanging string 14, and this hanging string 14 is hung so as to hang on a lock knob 16 inside the entrance door as shown in FIG. It is used by being fixed to the entrance door.

Next, the operation will be described. First, the case 13 is suspended from the lock knob 16 inside the entrance door using the hanging string 14 as shown in FIG. 2 and FIG. 3, and further fixed to the inside of the entrance door with a double-sided adhesive tape or the like. In this state, when the unlocking operation for the cylinder lock in the lock knob 16 is performed, the sensor of the sensor unit 1 detects the vibration resonating at about 2 KHz out of the shocking vibration generated by the unlocking operation. This vibration is amplified to a predetermined level by the low-frequency amplifier 2, and the presence / absence of the vibration is detected by a detector / delay circuit 3 as a picking vibration detecting circuit.

That is, as shown in FIG. 4 (b), for example, the vibration generated during the normal unlocking operation is detected as a vibration pulse having a short time and a certain pattern. The picking vibration that occurs with the operation continues for a relatively long time as shown in FIG. The presence or absence of the picking can be detected by differentiating the picking vibration from the vibration pattern generated by the normal unlocking operation. In order to reliably detect the output pulse of the detector, the output pulse is held (held in a continuous ON state).
Is performed.

The timer 4 is output from the detector / delay circuit 3 in accordance with the picking operation.
The continuation time from the detection start time t1 of the vibration shown in (a) is measured, and when the continuation time exceeds a predetermined time as shown in FIG. 4 (c), as shown in FIG. 5 (c). Then, the alarm time setting timer 5 is operated within the set time TA (for example, one minute), and the siren drive circuit 6 is operated within this one minute to sound the siren 7 as an alarm.

In this case, the first ring counter 10 is triggered by the intermediate output of the timer 4, and the first ring counter 10 outputs the first
By operating these switches, the hold time of the output of the delay circuit can be changed at random as shown by the dotted lines in FIGS. 4B and 5B.

Further, the second ring counter 11 is triggered by an intermediate output of the timer 4, and by operating the second switch 12 with the output of the second ring counter 11, the timer 4 is reset. The timing can be changed at random. As a result, also at the start of the operation of the alarm time setting timer 5, it changes randomly as shown in FIG.

Therefore, by randomly changing the hold time of the output of the delay circuit and the reset timing of the timer 4 as described above, it is impossible to analyze the picking vibration characteristics of the picking thieves themselves, thereby making it possible to obtain an unauthorized solution by picking. Locking can be reliably prevented.

The external output terminal 8 may be connected to another siren, a warning light, a warning display, or the like, if necessary, to generate a warning in a room or the like where these are installed. Can be. Therefore, this warning allows the residents of the house to take necessary measures, such as notifying the police, further increasing the effect of deterring unauthorized entry of the house, and suspicious attempts to directly enter the warning. By letting others know or let them watch, it is possible to effectively lose their willingness to enter without permission.

As described above, in the picking alarm device of the present invention, the unique vibration spectrum generated by the picking operation is analyzed by the picking vibration detecting circuit, and when the vibration continues for a predetermined time, it is determined that the picking is performed, and an alarm is issued. By using sound or display, for example, AA
Even if two type batteries are used for one year, the picking operation can be promptly notified to the resident in the room before the door is opened without turning on / off the device. Therefore, the resident can take necessary measures against the theft accident promptly, and as a result, the antitheft effect can be further enhanced. Since the picking alarm device of the present invention has a relatively simple circuit and can be configured using inexpensive parts, it can be compared with a conventional case using a special lock or using a plurality of locks together. As a result, the cost can be significantly reduced. Also, by randomly changing the delay circuit output and the picking detection time as described above, it is possible to reliably prevent the picking by an intelligent picking thief.

[0024]

As described above, according to the present invention, a sensor for detecting a vibration generated by an unlocking operation and a vibration pulse obtained by detecting an output of the sensor are held for a predetermined time. A detector / delay circuit; and a timer which is set at a timing of generation of an output from the detector / delay circuit and is reset after a predetermined time. The output of the detector / delay circuit is controlled by the timer. The alarm time setting timer activates the alarm within the set time when the time exceeds the specified time, so that the unlocking operation is based on the normal unlocking operation or the picking operation. It is possible to accurately judge whether the situation is based on the picking operation and immediately issue an alarm when it is based on the picking operation, so that residents can take the necessary measures promptly. Together, it is possible to escape the person intended to penetrate, and as a result, it is possible to prevent the occurrence of theft in advance.

In the picking alarm device according to the present invention, a first ring counter driven by receiving the output of the clock timer is provided, and a first switch receiving the output of the first ring counter includes: By randomly changing the hold time by the detector / delay circuit,
It is possible to prevent the picking thief from analyzing the characteristics of the detector / delay circuit and unlocking the detector / delay circuit by operation.

The picking alarm device according to the present invention further includes a second ring counter driven by receiving the output of the timer, and a second switch receiving the output of the second ring counter includes: By randomly changing the predetermined time measured by the clock timer,
The characteristic of the clock timer is analyzed by the picking thief and the clock timer is not operated, so that the unlocking by the picking operation can be prevented from occurring.

Further, an external output terminal is provided so that the output of the alarm time setting timer can be taken out from the external output terminal. Therefore, the picking operation by another person can be performed not only in one room, but also in another room or outdoors. Picking is made recognizable, so that prompt response actions can be taken.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a picking alarm device according to an embodiment of the present invention.

FIG. 2 is a partially cutaway front view showing the picking alarm device of the present invention.

FIG. 3 is a perspective view showing a use situation of the picking alarm device of the present invention.

FIG. 4 is a timing chart showing signal waveforms of respective parts of the block in FIG. 1 at the time of normal locking and unlocking.

FIG. 5 is a timing chart showing signal waveforms of respective parts of the block shown in FIG. 1 at the time of locking and unlocking by picking.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sensor part 2 Low frequency amplification part 3 Detector / delay circuit (Picking sound signal detection circuit) 4 Clock timer 5 Alarm time setting timer 6 Siren drive circuit 7 Siren (alarm) 8 External output terminal

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5C084 AA02 AA07 AA10 BB04 BB21 CC02 DD02 DD79 EE03 EE04 GG03 GG18 GG24 GG44 GG66 GG68 GG71 HH03 HH08 HH17

Claims (4)

[Claims] 1. A sensor unit for detecting vibration generated by an unlocking operation, a detector / delay circuit for holding a vibration pulse obtained by detecting an output of the sensor unit for a predetermined time,
A timer which is set at the timing of generation of the output from the detector / delay circuit and reset after a predetermined time;
An alarm time setting timer for operating an alarm within a set time when an output of the detector / delay circuit continues for more than a predetermined time measured by the clock timer. apparatus. 2. A first ring counter driven by receiving an output of the clock timer, and a first ring counter that receives an output of the first ring counter and randomly changes the hold time by a detector / delay circuit. 2. The picking alarm device according to claim 1, further comprising a first switch. 3. A second ring counter driven by receiving an output of the clock timer, and a second ring counter that receives the output of the second ring counter and randomly changes the predetermined time counted by the clock timer. 2. The picking alarm device according to claim 1, further comprising two switches. 4. The picking alarm device according to claim 1, further comprising an external output terminal for taking out the output of the alarm time setting timer to the outside.