JPH0769994B2 - Position detection device for crime prevention and disaster prevention sensors - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position detecting device for crime prevention and disaster prevention sensors, and more particularly, it operates by connecting sensors provided in an object to be watched, for example, doors, windows or rooms in series. The present invention relates to a position detection device for a crime prevention and disaster prevention sensor that can detect, display, and warn the position of an existing sensor.

[0002]

2. Description of the Related Art As is well known, warning devices are widely used for crime prevention and disaster prevention. The above-mentioned alerting device is an object to be alerted, that is, various sensors (door open sensor, window open sensor, smoke detector, etc.) provided in doors, windows and rooms, and displays and warns the operating state of various sensors. The display / warning means and the control unit for controlling them are provided.

A closer look at the above warning device shows that various sensors such as a magnet sensor, an optical sensor, and a thermoelectric conversion element are used depending on the intended use. The parts were connected by a line, and the sensors were connected in parallel.

According to the above warning device, since the sensors are connected in parallel, it is necessary to draw a line for each sensor, and wiring is difficult. In some cases, for example, Wiring becomes difficult if the building is complicated, the layout of the room is complicated, or if the guarded object is crowded.

Therefore, in order to solve the above problem, a sensor having a computer function by mounting an IC on a substrate is attached to a guarded object such as a door, a window, a room, etc. What is output to the control unit as a signal independent of each sensor is used. According to this, since the signal from each sensor is independent for each sensor, it is possible to connect each sensor in series, which facilitates wiring.

[0006]

According to the above-mentioned conventional technique, each sensor can be connected in series by assembling the IC to each sensor attached to the object to be watched, and the wiring becomes easy. High cost and IC
Since it is delicate and highly accurate, it is easily affected by noise and the like, so that it is liable to malfunction and the reliability of detecting the operating position of the sensor is reduced.

[0007]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the problems of the prior art as described above, and it is easy to wire to the sensor attached to the alarm target and the sensor is attached. An object of the present invention is to provide a position detection device for a crime prevention and disaster prevention sensor, which has low cost per se and high reliability in detecting the operating position of the sensor.

[0008]

In order to achieve the above object, the present invention has the following technical means. That is, the description will be made with reference to the reference numerals used in the accompanying drawings corresponding to the embodiments. In a warning device comprising a control unit 3 for detecting a signal based on the detected signal and displaying the detected position on a warning means 4 and issuing a warning.

The sensors 2 attached to each of the plurality of guarded objects 1 are connected in series by an inter-sensor series connection line 7,
A reference line 8 parallel to the inter-sensor series connection line 7 is provided, one end of each of the inter-sensor series connection line 7 and the reference line 8 is connected to the capacitance measuring section 5, and the other end 9a of each is connected. 9b is connected, and when any one of the sensors 2 attached to the alarm target 1 detects an abnormality such as opening, intrusion, fire, etc. of the alarm target 1,

The capacitance measuring unit 5 measures the capacitance generated between the sensor series connection line 7 from the sensor 2 which has detected the abnormality to the capacitance measuring unit 5 and the reference line 8 parallel to it. At the same time, the measured value is output to the control unit 3, and the control unit 3 compares the measured value with the data stored in the storage unit 6 in advance, and operates the sensor 2 according to the measured value based on the comparison result. Position display and warning means 4
It is a position detecting device for crime prevention and disaster prevention sensors, which is characterized by displaying and alerting with light or sound.

[0011]

According to the above structure, the static electricity generated between the inter-sensor series connection line 7 for connecting the sensors 2 attached to each of the vigilance objects 1 in series and the reference line 8 provided in parallel therewith. Since the capacitance differs depending on the position of the sensor 2 in operation, the measured value measured by the capacitance measuring unit 5 is compared with the data stored in the storage unit 6 in advance by the control unit 3 to measure the measured value. The operating position of the sensor 2 according to the above can be detected easily and accurately, and the display and the warning can be surely performed.

Further, since the sensors 2 are connected in series, wiring at the time of installation thereof is easy, and since it is not necessary to use a special sensor 2 itself, the cost is low.

[0013]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 schematically shows an example of installation of the warning device of the present invention. The above-mentioned warning device includes sensors 2 (S1 to SN) attached to each of a plurality of warning targets 1 (No. 1 to No. N), a capacitance measuring unit 5 for measuring their operating state, and the static sensor Control unit 3 and control unit 3 for determining the operating position of the sensor 2 from the measured value of the capacitance measuring unit 5.
It comprises a display based on the above judgment, a display for issuing a warning, a warning means 4 and a power supply 10 for operating them.

The sensors 2 are connected in series by an inter-sensor series connection line 7, and a reference line 8 parallel to the inter-sensor series connection line 7 is provided. One end of each of the inter-sensor series connection line 7 and the reference line 8 is connected to the capacitance measuring unit 5, and the other ends 9a and 9b thereof are connected.

The control unit 3 has a storage unit 6 which stores preset data for comparing the measured values from the capacitance measuring unit 5, and the storage unit 6
The operating position of the sensor 2 corresponding to the measured value is determined based on the data of 1. The display / warning means 4 displays / warns a person by light or sound based on the judgment of the control unit 3.

Next, the operation will be described. 2 and 3 are further schematic representations of the above-mentioned warning device. First, the sensor 2 of the warning device installed as described above
Operate one by one in order from 1 to SN, measure the capacitance of each sensor 2 at the time of operation with the capacitance measuring unit 5,
The measured values (Q1 to QN) are stored in the storage unit 6. At this time, the position of the sensor 2, that is, the position of the alarm target 1 is stored in one-to-one correspondence with each measured value. (Q = No.1, Q2 = No.2, Q3 = No.3 ...
QN = No. N)

In the above description, the electrostatic capacity of each sensor 2 during operation is the distance (l1 from the electrostatic capacity measuring unit 5 to each sensor 2).
.About.lN), the values can be set without operating each sensor 2 when the distances are known in advance, and the work can be simplified. At this time, for example, for l = 1.8 m, Q = 10
The calculation may be performed with 0 pF.

Due to the above work, the alarm device of the present invention is
It is possible to detect an abnormality such as opening, intrusion, fire of a door, window, room, etc., and its steady state, that is, the case where no abnormality has occurred is shown in FIG. At this time, each sensor 2 is not operating, and the inter-sensor series connection line 7 and the reference line 8 are connected to each other at the other ends 9a and 9b, thus forming a closed circuit. No capacitance is generated between the reference line 7 and the reference line 8, and malfunction due to noise or the like does not occur.

Next, the operation of the sensor 2 will be described with reference to FIG. Sensor 2 that has detected an abnormality in the target 1
By operating (S2 in this embodiment), the closed circuit formed by the inter-sensor series connection line 7 and the reference line 8 is opened at the position S2. As a result, a capacitance Q2 is generated from the capacitance measuring section 5 to S2, that is, between the sensor series connection line 7 having a length of 12 and the reference line 8.

The capacitance Q2 measured by the capacitance measuring unit 5 is sent to the control unit 3 (arrow 11) and compared with the data in the storage unit 6 (arrow 12). Then, the control unit 3 displays the comparison result (Q2 = No. 2) and the warning means 4
To the N of the warning target 1 as the operating position of the sensor 2.
o. 2 is displayed and warned to a person by sound or light.

When the sensor 2 is operated, electrostatic capacitance is generated at the same time when the sensor 2 is operated, and the same is true for the sensor 2 at any position. Therefore, the signal transmission speed does not matter, and the sensor 2 has no problem. Since the signal transmission speed does not change even if the number of sensors is increased, the number of sensors 2 to be mounted is not limited and the sensor can be widely used. There is no part other than the sensor 2 that operates, and its maintenance and inspection are very easy and highly reliable.

There is a case where the electrostatic capacitance changes with the change of the external environment, but since the change is small with respect to the electrostatic capacitance due to the operation of the sensor 2, the control unit 3 is controlled. , ± 10 as the tolerance when comparing with the data
By setting about%, it is possible to sufficiently cope with it, prevent malfunction of the device, and further improve reliability.

As the sensor 2 used in the present invention, various types such as a magnet sensor and an optical sensor can be used as long as the sensor 2 is of a type whose operation is performed by turning a switch on and off. The cost is low, and since the sensors 2 are connected in series, the wiring is easy.

[0024]

As described above in detail, according to the present invention, the following effects can be obtained. That is, since the sensors attached to a plurality of caution objects are connected in series, wiring is easy at the time of installation, and the sensors are not special ones, and various conventionally used sensors can be used. So low cost,

Further, since the detection of the operating position of the sensor is performed by the change of the electrostatic capacitance, the detection does not take time, and since there is no operating portion other than the sensor, maintenance and inspection are easy. It is possible to provide a highly reliable position detecting device for crime prevention and disaster prevention sensors, which is highly reliable and less susceptible to noise and the like.

[Brief description of drawings]

FIG. 1 is a configuration diagram illustrating an installation example of a warning device.

FIG. 2 is a schematic diagram showing a steady state of a warning device.

FIG. 3 is a schematic diagram showing an operating state of a warning device.

[Explanation of symbols]

 1 Warning target 2 Sensor 3 Control part 4 Display and warning means 5 Capacitance measuring part 6 Storage part 7 Serial connection line between sensors 8 Reference line

Claims (1)

[Claims] 1. A crime prevention / disaster prevention sensor 2 group attached to a plurality of vigilance objects 1 and the position of an active sensor 2 of the sensor 2 group are detected, and displayed and warned based on the detection signals. In a warning device comprising a control unit 3 for displaying and warning the detected position on the means 4, the sensors 2 attached to each of the plurality of warning targets 1 are connected in series by an inter-sensor series connection line 7, A reference line 8 parallel to the inter-sensor series connection line 7 is provided, one end of each of the inter-sensor series connection line 7 and the reference line 8 is connected to the capacitance measuring section 5, and the other ends 9a, 9 are provided.
When any one of the sensors 2 attached to the alarm target 1 detects an abnormality such as opening, intrusion, or fire of the alarm target 1, the sensor 2 detects the abnormality and the capacitance measuring unit 5 is connected. Up to the series connection line between sensors 7 and the reference line 8 parallel to it are measured by the capacitance measuring unit 5, and the measured value is output to the control unit 3, and the control unit 3 Then, the measured value is compared with the data stored in advance in the storage unit 6, and the operating position of the sensor 2 corresponding to the measured value is displayed from the comparison result, and the warning means 4 is displayed.
Position detection device for crime prevention and disaster prevention sensors, which displays and warns by light and sound.