JPH0342534Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an intruder alarm device that detects the intrusion of an intruder into a dwelling unit and automatically notifies a designated notification destination.

[Technical background of the invention and its problems]

This type of conventional intruder alarm device, as shown in FIG. Mode set circuit 20 and oscillation circuit 3 that generates clock pulses
0, a timer circuit 40 which is set to the detection side by the outing mode set circuit and generates an intrusion alarm signal after a predetermined time has elapsed since the intruder detection circuit detects an intrusion, and a timer circuit 40 which receives the intrusion alarm signal. Automatic reporting device 5 that automatically reports to a designated reporting destination
0.

Here, the intruder detection circuit 10 is a security switch 1 whose contacts open and close in response to opening and closing of the entrance door and window.
1. It has an AND circuit 12 whose first input is the status signal of the security switch 11 and whose second input is the output of the going-out mode set circuit 20.

The go-out mode set circuit 20 also includes a go-out mode set switch 21 whose contacts close only when pressed and open when released, and a D connected so that the circuit state is reversed each time this switch is operated. Flip-flop (hereinafter referred to as D-FF)
It is equipped with 22.

Furthermore, the timer circuit 40 includes a counter 41 that counts the clock pulses of the oscillation circuit 30, and a circuit state is set by a signal when this counter reaches a predetermined value (in this specification, the Q terminal output becomes "H"). (This is called a set) D-FF
42, a D-FF 43 whose circuit state is set by the intruder detection signal of the intruder detection circuit;
After this D-FF43 is set, the oscillation circuit 3
It consists of a counter 44 that counts zero clock pulses.

The conventional intruder alarm device is configured as described above, and unless the resident presses the outing mode set switch 21, the terminal output of the D-FF 22 is "H" and the counter 41 and the D-FF 42 are cleared. There is. Further, the D-FF 43 is cleared by the terminal output of the D-FF 42, and the counter 44 is cleared by the terminal output of this D-FF 43.

Here, when the resident closes the window and door to go out, the security switch 11 closes, thereby canceling the clearing of the D-FF 22, and at the same time, the CK terminal input of the D-FF 43 becomes "H". to "L". Then, when this resident presses and operates the outing mode set switch 21, the D-FF 22
A pulse-like signal is applied to the CK terminal, and at this time D
D-FF22 is set while holding the terminal input state. With this set, counter 41 and D
-The clearing of the FF 42 is canceled, and the counter 41 starts counting the clock pulses of the oscillation circuit 30.

The clearing of the D-FF 42 is canceled until the count value reaches a predetermined value after the counter 41 starts counting clock pulses, that is, until a predetermined time has elapsed, but the Q _H terminal output is Therefore, the output of the D-FF 42 is "H" and the D-FF 43 is still cleared.

During this time, if the resident opens the door and goes out,
The intrusion detection signal of the intruder detection circuit 10 becomes "H" only when the door is opened, but since the D-FF 43 is cleared, this intrusion detection signal is prevented from being applied to the automatic notification device.

Next, after a certain period of time after the counter 41 reaches a predetermined value, the _QH terminal output becomes "H" and the D-FF
42, so at this point D-FF43
clearing is canceled.

When the door or window is opened in this state, the intruder detection signal becomes "H", the D-FF 43 is set, and the counter 44 is also cleared. The counter 44 then starts counting clock pulses, and after a predetermined period of time, the Q _H terminal goes high.
Then, the automatic notification device 50 is activated. That is, the designated notification destination is automatically notified that an intruder has entered.

Note that even if the counter 44 counts the clock pulses, the automatic notification device 5 will continue to
0 does not operate, so when a resident who knows the details presses the outing mode switch 21 after returning home, the circuit state of the D-FF 22 is reversed and the terminal output changes from "L" to "H". As a result,
The counter 41, D-FF 42, D-FF 43, and counter 44 are all cleared and return to the state before going out.

Thus, with this conventional intruder detection circuit, when going out, the user presses the outing mode set switch 21, opens the door within a certain period of time determined by the counter 41, quickly opens the door, and goes outside. If the intrusion detection circuit is reset by pressing the outing mode set switch 21 within a certain time determined by the counter 44 when returning home without reporting, the configuration is such that no notification is made to the outside.

However, with this conventional device, it is not always clear from the resident's perspective how much time they have to safely open the door without causing a false alarm when they go out, and how much time they have to press the go-out mode switch to cancel intrusion detection when they return home. However, there was a problem in that it took extra time when going out, and there was a delay in releasing the settings when returning home, resulting in frequent false alarms.

[Purpose of invention]

The present invention was devised to solve the above-mentioned problems, and aims to provide an intruder alarm device that can significantly reduce the frequency of false alarms caused by residents going out and returning home.

[Summary of the idea]

In order to achieve this purpose, the present invention provides a timer circuit that prevents notification operations, that is, for a certain period of time after setting the intruder detection circuit and before leaving the house, and after returning home. It is equipped with an alarm sound generation circuit that generates an alarm sound for a certain period of time until it is released, and residents use this alarm sound as a guide to go outside or cancel the setting.

[Example of idea]

FIG. 1 is a circuit diagram showing the configuration of an embodiment of the present invention, and the same reference numerals as in FIG. 3 indicate the same elements or elements having the same effect. Further, the timer circuit 40a is connected to a D-signal connected to be set by the output of the _QH terminal of the counter 44.
FF45 is added and the output of its Q terminal is applied to the automatic notification device 50, and an alarm sound generation circuit 60 is newly added that generates an alarm sound while the counter 41 and the counter 44 are each performing a counting operation. This is different from Figure 3 in this point.

Here, the alarm sound generation circuit 60 receives the clock pulse of the oscillation circuit 30, the _QL terminal output of the counter 41,
An AND circuit 41 that takes the AND of the terminal outputs of the D-FF 42, an AND circuit 62 that takes the AND of the clock pulse of the oscillation circuit 30, the _QL terminal output of the counter 44, and the terminal output of the D-FF 45;
an OR circuit 63 that takes the logical sum of the outputs of the AND circuit;
It consists of an amplifier 64 that amplifies this output, and a speaker 65 that makes sounds based on the amplified output.

The operation of this embodiment configured as described above will be explained below with reference to FIG. 2, focusing on the parts newly added to the conventional device.

First, when you press the go-out mode set switch 21 to go out, the counter 41 starts counting, and when the counted value reaches a predetermined value, the Q _H terminal goes "L".
The level changes from "H" level, but during this time
From the Q _L terminal, the clock frequency is divided, for example, 2.
A pulse signal with a period of seconds is output. Further, while the counter 41 is counting, the output from the terminal of the D-FF 42 is "H". Therefore, a clock signal is generated from the AND circuit 61 while the _QL terminal output of the counter 41 is at the "H" level, and the clock signal is output from the speaker 6.
5 responds to this and generates an alarm sound of "beep, beep...". And Q _H of counter 41
The terminal output changes to "H" level and D-FF42
When set, the terminal output of this D-FF 42 is inverted to "L", so the output of the AND circuit 41 disappears, and the alarm sound stops.

Next, when you open the door on your way home, the counter 44 starts counting, and when the counted value reaches a predetermined value, the Q _H terminal output changes from "L" to "H".
Up to this point, the _QL terminal of the counter 44 outputs a pulse signal with a period of 2 seconds, for example, which is obtained by dividing the clock. Also, while the counter 44 is counting, D
The terminal output of -FF45 is "H". Therefore, from the AND circuit 62, Q _L of the counter 44 is
A clock signal is generated during the period when the terminal output is at the "H" level, and the speaker 65 responds to this by generating an alarm sound of "beep, beep, beep...". Then, the Q _H terminal output of the counter 44 is "H"
When changing to level and setting D-FF45,
Since the terminal output of this D-FF 45 is inverted to "L", the output of the AND circuit 62 disappears, and the alarm sound stops.

FIG. 2 is a time chart showing the timing at which this alarm sound is generated.If the intruder detection circuit 10 is set to the detection side by pressing the out-of-home mode set switch 21 at time _t1 , the intruder detection circuit 10 is set to the detection side from this moment on. An alarm sound is generated for the person and the person is allowed to open the door and go outside within _T1 time while the counter 41 is performing counting operation. And counter 41
The alarm sound stops at time t ₂ when the machine finishes its counting operation, and from this moment on, it goes into a state of alert.

On the other hand, when the resident returns home and opens the door at time _t3 , an alarm sounds from that moment on, and the counter 4
4 is performing counting operation.Press the outing mode set switch 21 within ₂ hours to turn on the intruder detection circuit 1.
If you reset it to 0, automatic notification will not be sent.

However, if the alarm sound stops without pressing the outing mode set switch 21, the alarm will be automatically notified at that moment.

Thus, the resident only has to press the going out operation and going out mode set switch 21 while the alarm is being sounded, thereby minimizing the rate of false alarms caused by going out and returning home.

[Effect of idea]

As is clear from the above explanation, according to the present invention, an alarm sound is generated within the dwelling unit while the intruder detection circuit detects an intrusion and the timer circuit prevents the automatic notification operation. Since the alarm is equipped with a generating circuit, the occupants only need to go outside while the alarm is occurring or reset the intruder detection system, allowing them to take the necessary measures reflexively. This has the effect of minimizing the frequency of false alarms due to operational errors.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing the configuration of an embodiment of the present invention, Fig. 2 is a time chart for explaining the operation of the same embodiment, and Fig. 3 is a circuit diagram showing the configuration of a conventional intruder alarm device. It is. 10... Intruder detection circuit, 11... Crime prevention switch, 20... Going out mode set circuit, 21... Going out mode setting switch, 30... Oscillator circuit, 4
0, 40a...Timer circuit, 50...Automatic notification device, 60...Alarm sound generation circuit.

Claims (1)

[Scope of utility model registration request] an intruder detection circuit that detects that an intruder has entered the dwelling; an out-of-home mode set circuit that sets and resets the intruder detection circuit to the detection side; and an intruder detection circuit that detects an intrusion. an automatic notification device that automatically notifies a designated notification destination of an intrusion; a timer circuit that blocks the notification operation of the automatic notification device for a predetermined period of time after the intruder detection circuit detects an intrusion; An intruder alarm device comprising: an alarm sound generation circuit that generates an alarm sound within a dwelling unit while a timer circuit prevents a reporting operation.