JP2002231083A - Switch operation detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detecting device which is equipped with many alarm switch elements and which makes an appropriate crime prevention countermeasure by identifying and detecting which alarm switch element is opened (broken). SOLUTION: The switch action detecting device comprises plural constant current elements 10a, 10b, 10c, 10d,..., witch circuits S0, S1, S2, S3,... that are connected in series respectively to the constant current element, a power source part 12 that is connected in parallel to each of the series circuits of the constant current element and the switch circuit, and a current measuring part 11 that measures the current value that flows from the power source part to all the circuits. The constant current elements, of which current value is set at different value respectively, identifies the switch circuit that is broken by the current value detected by the current measuring part, and each switch circuit is constructed of one or plural series connected alarm switch element 1-7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch operation detecting device, and more particularly, to a switch operation detecting device capable of detecting which one of a plurality of switch elements has been broken and detecting it.

[0002]

2. Description of the Related Art Conventionally, it has been installed in houses, offices, etc.
There have been security devices that detect opening of windows and doors, generate an alarm sound, and perform security. As shown in FIG. 3, security devices include security switch elements A, B, C, D, E,.
And a detection unit 60. Security switch element A,
, B, C, D, E,... Are connected to the detection unit 60 by series connection, and a closed circuit is configured. The detection unit 60 includes a detection device that detects the opening of the security switch elements A, B, C, D, and E, that is, the opening of the closed circuit, and an alarm sound that generates an alarm sound based on a detection signal from the detection device. A device or the like is provided.

In such a security device, the security switch elements A, B, C, D, E,... , B, C, D, E,... Become open, the detecting unit 60 detects that the windows and doors are open, and generates an alarm sound.

[0004]

However, in the conventional security device, it is possible to detect that either the window or the door is in the open state.
Doors could not be identified and detected. For this reason, when the alarm sounds, it cannot be determined which window or door has been opened, and when there are a large number of windows and doors in which security switch elements are installed, security measures cannot be taken quickly. There was a point. Also, when the security device is switched from the stopped state to the operating state, if the alarm sounds, it cannot be immediately determined which window or door is locked, and all the windows and doors are locked again. There was a drawback that we had to do.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is possible to specify which security switch element has been opened even in a detection device provided with a large number of security switch elements. It is an object of the present invention to provide a switch operation detecting device capable of detecting opening and closing.

[0006]

In order to achieve the above object, a switch operation detecting device according to the present invention comprises a plurality of constant current elements, a switch circuit connected in series to each of the constant current elements, a constant current element and a switch. A power supply unit connected in parallel to each of the series circuits of the circuit, and a current measurement unit that measures a current value flowing from the power supply unit to the entire circuit, the constant current element includes:
By using ones whose current values are set to different values, the breaker switch circuit is specified from the current value detected by the current measurement unit, and each switch circuit is connected one or in series. It is composed of a plurality of switch elements.

Further, the switch operation detecting device of the present invention comprises:
The constant current element has a current value of 2 ⁿ (n = 0, 1,
By using one set in (2, 3,...), A broken switch circuit is specified from the current value detected by the current measuring unit.

In this switch operation detecting device, constant current elements each having a different current value are provided in series with each of the plurality of switch circuits, and are connected in parallel to the power supply section. By measuring the value of the current flowing through the entire circuit, a broken switch circuit can be detected.

Further, since the current value is set to 2 ⁿ for the constant current element, it is possible to identify and detect which switch circuit has been broken, and to identify and detect the opened security switch element. As a result, quick processing can be performed, and the confirmation operation can be easily performed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the switch operation detecting device of the present invention is applied to a security device installed in a house or the like will be described in detail with reference to the drawings.

As shown in FIG. 1, a security device to which the switch operation detecting device of the present invention is applied is provided with security switch elements 1 to 7 installed at windows and doors for security. Can be Security switch elements 1 to 7
Are switch circuits S ₀ , S ₁ ,
S ₂ and S ₃ are configured. For example, security switch elements 1 to 3 installed in windows, doors and the like provided in the area a are connected in series with each other, and the switch circuit S ₀
Is configured. The same applies to security switch elements provided below the area b. That is, the security switch element 4 is provided in the area b, and the security switch element 4 is provided.
The configured switch circuits S _1, in the area c switch elements 5 and 6 are provided for security, the switch circuit S ₂ is a switch element 5 and 6 for crime prevention that are connected in series, in the area d switch 7 for crime prevention is provided, the switch circuit S ₃ is formed by the switch element 7 for crime prevention. Each of the switch circuits S ₀ to to S ₃ constant current element 10a having different current values, respectively, 10b, 10c,
10d are connected in series. Further, a power supply unit 11 is provided in which a switch circuit and a constant current element are connected in parallel for each of the areas a to d, and a current measuring unit 12 for measuring a current value flowing through the entire circuit is provided.

Such a switch operation detecting device is applied.
Security devices to be provided in each of the areas a to d
Of the constant current elements 10a to 10d
When the switch elements 1 to 7 are closed,
2ⁿA constant current of (n = 0, 1, 2, 3,...) MA flows
Set as follows. For example, the switch circuit S in the area a₀
The current value of the constant current element 10a connected to⁰) M
A, switch circuit S in area b₁Constant current element connected to
The current value of the child 10b is 2 (2¹) MA, area c switch
H circuit S_TwoThe current value of the constant current element 10c connected to
(2^Two) MA, switch circuit S in area d_ThreeConnected to
The current value of the constant current element 10d is set to 8 (2^Three) Set to mA
You. Any of the security switch elements 1-7
Windows and doors are opened, and security switch elements 1 to 7 are connected.
When one or more are opened, the switch circuit S ₀~ S_ThreeIs blurred
Switched and broken switch circuit S₀~ S_ThreeConnect to
The voltage of the power supply unit 11 is not applied to the constant current element
Current stops flowing. The current measurement unit 12
The sum of the removed current values is measured.

Therefore, as shown in FIG.
If the current value measured in Step 2 is 0 mA, it can be detected that all the switch circuits S _{0 to} S ₃ are broken. If the measured current value is 1 mA, area a
Only the switch circuit S ₀ is closed, it is detected that the switch circuit S ₁ to S ₃ of the areas b~d is a break, if the measured current value is 2 mA, the switching circuit S the area b Only ₁ is closed, and it can be detected that the switch circuits S ₀ , S ₂ , S _{3 of} the areas a, c, d are broken. Further, if the measured current value is 3 mA, the switch circuits S ₀ and S _{1 in} the areas a and b are closed,
The switch circuits S ₂ and S _{3 in the} areas c and d are broken,
If the measured current value is 4mA, only the switch circuit S ₂ of the area c is closed, the area a, b, the switch circuit of _{d S 0, S 1, S} 3 is detected to have been break If the measured current value is 5 mA, area a,
It can be detected that the switch circuits S ₀ and S _{2 of} c are closed and the switch circuits S ₁ and S _{3 of} areas b and d are broken. Similarly, when the measured current value is 6 to 15 mA, it is possible to detect which of the switch circuits is broken by the current value measured by the current measurement unit 12. When the measured current value exceeds 15 mA, it can be detected that there is a possibility that a short circuit has occurred in the line.

When the current value measured by the current measuring unit 12 is less than 15 mA, it is possible to detect which switch circuit is breaking based on the measured current value, and to determine which switch is opened according to the detected value. By displaying on a display unit (not shown) or emitting a different alarm sound, an opened security switch element can be specified, an alarm can be generated, and a countermeasure can be facilitated. . Further, when the current value measured by the current measuring unit 12 exceeds 15 mA, similarly, a display to that effect or an alarm sound can be sounded to notify the possibility of a short circuit.

The present invention is not limited to the above embodiment, but it is also possible to use a resistance element instead of a constant current element, set the resistance element to a predetermined current value, and detect a switch operation. . The switching element for crime prevention, the number of switching circuits is not limited to the above, if the current value is also 2 ⁿ mA set to a constant current device may be a n> 3. Further, the present invention is not limited to a security device installed in a house or the like, and can be suitably applied to a system including a plurality of switch elements.

[0016]

As is apparent from the above description, according to the switch operation detecting apparatus of the present invention, a plurality of switch circuits are provided with constant current elements set to different current values corresponding to the respective switch circuits. Since the switch circuit is provided in series and connected in parallel to the power supply unit, a broken switch circuit can be detected by measuring a current value flowing through the entire circuit. Also, since the current value was set to 2 ⁿ (n = 0, 1, 2,...) MA for the constant current element,
Regardless of the number of switch circuits, it is possible to identify and detect which switch circuit has been broken, and it is possible to easily confirm the opened security switch element.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a switch operation detection device of the present invention.

FIG. 2 is an explanatory diagram showing the operation of the switch operation detection device of the present invention.

FIG. 3 is a block diagram showing a conventional switch operation detection device.

[Explanation of symbols]

1-7 ... switching elements 10a, 10b, 10c, 10d ··· constant current element 11 ... power supply unit 12 ... current measuring unit _{S 0, S 1, S 2} , S 3 ··· switch circuit

Claims (2)

[Claims] A plurality of constant current elements (10a, 10b, 10
c, 10d,...) and switch circuits (S ₀ , S ₁ , S ₂ , S ₃ ,...) connected in series to the constant current elements, respectively.
A power supply unit (12) connected in parallel to each of the series circuit of the constant current element and the switch circuit; and a current measurement unit (1) for measuring a current value flowing from the power supply unit to the entire circuit.
Wherein the constant current element specifies a switch circuit that has been broken from the current value detected by the current measurement unit by using elements whose current values are set to different values. A switch operation detecting device, wherein each switch circuit comprises one or a plurality of switch elements (1 to 7) connected in series. 2. The constant current element has a current value
By using a switch set to 2 ⁿ (n = 0, 1, 2, 3,...), A broken switch circuit is specified from the current value detected by the current measurement unit. The switch operation detecting device according to claim 1, wherein