JPS6219998A - Invasion alarm - 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 provides an intruder alarm that detects the vibration of a door when an intruder opens or closes a door or breaks a window glass such as a glass door to illegally enter. It is related to the device.

[Prior art]

As shown in Fig. 4, the conventional intruder alarm system uses a reed switch 17 to detect when an intruder opens or closes a door, and a vibration sensor 18 to detect when an intruder breaks a window glass and enters illegally. Vibrations in the door were detected. The above two types of detection outputs are sent to the alarm device 20 via a total of four power supply lines 19, two each. In such an intrusion alarm device, as shown in FIGS. 5(a) and 5(b), an alarm 20 and a reed switch 17 are attached to a window frame 21, and a vibration sensor 18 is attached to a glass door 22 that opens and closes the window. It is installed. The window frame 21 and glass door 22 include
Contacts 23 interposed in the power supply paths 19, 19 are attached to the surfaces where the two come into contact with each other with double-sided tape 24 at corresponding positions. A magnet 25 is attached to the upper corner of the glass door 22 at a position that approaches the reed switch 17 when the glass door 22 is closed, and when the glass door 22 is opened, the magnet 25 It was separated from the switch 17, and the opening/closing operation of the reed switch thereby detected by the alarm 20.

However, in the above-mentioned conventional structure, since the opening/closing of the glass door 22 and the vibration of the glass door 22 are detected by dedicated detection means, the number of parts increases and the installation work and wiring work are time-consuming.

Furthermore, since four types of power supply paths 19 are required, there is a risk of incorrect wiring.

[Purpose of the invention]

The present invention has been made in consideration of the above conventional problems, and aims to provide an intrusion alarm device that can reduce the number of parts and can be easily installed with simple wiring. It is.

[Structure of the invention]

The intrusion alarm device of the present invention is an intrusion alarm device that detects abnormal vibrations of a door in a closed state using a vibration detector and notifies the user with an alarm, and the intrusion alarm device is an intrusion alarm device that uses a vibration detector to detect abnormal vibrations of a door in a closed state and notifies the user using an alarm. The present invention is characterized in that it includes a means for detecting an opening operation at the contact, and is configured such that an illegal opening operation of the door can be detected by detecting the opening operation of the contact.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

The outline of the intrusion alarm device of this embodiment is shown in a block diagram as shown in FIG. The vibration detector 1 and the alarm device 2 are connected by 402 power supply lines (SGH line (signal line) 3, SGL line (ground line)). A contact 5.6 is interposed between the two power supply paths.

As shown in the circuit diagram of FIG. 1, the vibration detector 1 is provided with a vibration sensor 7 that detects vibrations and generates an output signal. A backflow prevention diode 8 is connected to the vibration sensor 7 to protect the vibration sensor 7. Connected to the output side of the guide 8 are a voltage dividing resistor 9 whose one end is grounded, and an SGH line 3 for transmitting the detection output of the vibration sensor 7 to the alarm 2. Further, an SGL line 4 is provided between the vibration detector 1 and the alarm 2, and the SGH line 3 and the SGL line 4 have contacts 5a and 5b and contacts 6a and 6b, respectively. It has been intervened. The SGH line 3 is provided in the alarm 2 and connected to an opening/closing detection comparison circuit 10 to which a predetermined reference voltage is set.

On the input side of this opening/closing detection comparison circuit 10, there is a resistor 1 for voltage division.
1 is connected, and the other end is connected to the power supply voltage VDr)
has been entered. In addition, the opening/closing detection comparison circuit 100
A vibration detection smoothing circuit 12 is connected to the input side, and a comparison circuit 13 to which a predetermined reference voltage is set is connected to the vibration detection smoothing circuit 12. As shown in FIG. 3, the intruder alarm device having the above circuit configuration has an alarm device 2 mounted on a vertical bar 14a of a window frame 14, and a vibration detector 1 mounted on a glass door 15 that can be opened and closed. . The vertical bar 14a
Contacts 5b and 6b shaped like a sickle are attached to the contact surface of the glass door 15 with double-sided tape 16. On the other hand, plate-shaped contacts 5a and 6a are similarly attached to the glass door 15 at positions corresponding to the contacts 5b and 6b using double-sided tape 16.

In the above configuration, when the glass door 15 is closed, the contacts 5a and 5b and the contacts 6a and 6b are in contact, and the SGH line 3 and the SGL line 4 are in a conductive state. At this time, the power supply voltage VDD is divided by the resistor 9 and the resistor 11, and the opening/closing detection comparison circuit 1
The potential at the 0 point of the 0 input terminal is lower than the reference voltage of the open/close detection comparison circuit 10. As a result, the output of the open/close detection comparison circuit 10 is inverted, and a close signal is output. Here, when the glass door 15 is opened illegally, the contact point 5a
5b and contacts 6a and 6b are opened, and the potential at the above point becomes r (level).As a result, the potential at the 0 point becomes higher than the reference voltage of the open/close detection comparison circuit 10, and the open/close detection comparison circuit 10 detects an open state. A signal is output and an illegal opening operation of the glass door 15 is notified.Furthermore, when the window of the glass door 15 in the closed state is subjected to external force or is broken by this external force, the abnormal vibration at this time is detected by the vibration sensor 7 of the vibration detector 1, and this detection output is sent out.This detection output is transmitted to the diode 8 and the SGH.
The signal is input to the vibration detection and smoothing circuit 12 via line 3, where the vibration component is extracted and smoothed. The output signal of the vibration detection smoothing circuit 12 is compared with the half voltage of the comparator circuit 13.9, and if it is higher than the reference voltage, the output of the comparator circuit 13 is inverted and an alarm signal is sent out.

〔Effect of the invention〕

As described above, the intruder alarm device of the present invention is configured to detect the illegal opening and closing of a door by detecting the opening and closing of the power supply path connecting the vibration detector and the alarm. This eliminates the need for a separate means for detecting the opening and closing of the door, thereby reducing the number of parts and reducing costs.

Further, in accordance with this, the installation work of the present device and the installation work of wiring etc. are greatly simplified, and the reduction in the number of wires results in a reduction in erroneous wiring.

[Brief explanation of the drawing]

Fig. 1 is a circuit configuration diagram showing an embodiment of the present invention, Fig. 2 is a professional diagram showing an overview of the intrusion alarm device shown in Fig. 1, and Fig. 3 is the same as shown in Fig. 1. A schematic diagram showing the installation state of an intrusion alarm device, Fig. 4 is a block diagram showing a conventional example, and Fig. 5 (
a> and (b) are a schematic diagram and a cross-sectional view taken along the line A-A' showing the installed state of the intrusion alarm device of sub-A shown in FIG. 74. 1 is a vibration detector, 2 is a Wtf'a device, 3 is a signal line, 4 is a ground line, 5a, 5b, 6a, 6b are contacts, 7 is a vibration sensor, 9 and 11 are resistors, 10 is an open/close detection comparison circuit , 12
1 is a vibration detection smoothing circuit, and 13 is a comparison circuit.

Claims (1)

[Claims] 1. An intrusion alarm device that uses a vibration detector to detect abnormal vibrations of a door in a closed state and alerts the user with an alarm, which detects an opening operation at a contact installed in a power supply path connecting the vibration detector and the alarm. An intrusion alarm device characterized by comprising a means.