JPH06253375A - Wireless security system - Google Patents

Abstract

PURPOSE:To extend a signal communication area in the height direction of a wireless security system for monitoring safety/disaster prevention information relating to plural opening parts such as the windows and doors, etc., of a building and to widen the application range by constituting the plural antennas of a control means switchably to time division in-phase/anti-phase. CONSTITUTION:Plural loop antennas 4 and 4b are arranged respectively in upper and lower layers, on the ceiling and the floor of a room for instance, a phase switching device 30 is provided between them, both antennas are constituted respectively switchably to the in-phase/anti-phase in a time-division manner and also the antenna A of a sensor part 6 is provided with directivity. In this case, an induction magnetic field transmission/reception antenna A for which a coil 6a is provided with the directivity is constituted. Thus, compared with the case of a single loop antenna, in a magnetic field at the time of the in-phase/anti-phase, magnetic fluxes are obtained time sequentially, the fixed strong magnetic fluxes are obtained substantially especially between the loops 4 and 4b, or the outward strong magnetic fluxes can be generated from a center in the vertical direction of the loops 4 and 4b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless security system for wirelessly monitoring security / disaster prevention information regarding a plurality of openings such as windows and doors of a building.

[0002]

2. Description of the Related Art An example of a conventional security system of this type is disclosed in, for example, Japanese Patent Laid-Open No. 62-27819.
A crime prevention device as shown in FIGS. 4 and 5 has been proposed and disclosed. FIG. 4 is a front view thereof, and FIG. 5 is a circuit diagram.

In FIG. 4, reference numeral 11 shows the entire system. 12 is a glass window frame, 13a and 13b are a pair of sliding glass doors, 14a and 14b are vertical stiles of each glass door, 15 is a crescent lock, and 15a and 15b.
Shows a rotation lever and an engaging claw for locking. 20 is an oscillator composed of Colpitts oscillator circuit, 17 is a coil on the door side,
Reference numeral 21 is a main controller (master unit) that controls monitoring / control of information signals, and 24 and 27 are transmission lines.

In FIG. 5, 23 is a coil of the Colpitts oscillator circuit of the oscillator 20, 24 is a signal line, and 25 is a signal line.
A movable glass door-side circuit portion arranged in the upper space of the vertical stile 14b, which has a coil 17 and is connected to a reed switch 26 through a signal line 27.

Next, the operation of the above configuration will be described. When the glass door 13a is opened and the coil 23 on the oscillator 20 side and the coil 17 on the glass door 13a side are not in the facing positional relationship, the oscillator 20 oscillates at the first oscillation frequency. Further, the glass door 13a is closed, and both coils 2
Although 3 and 17 are in the facing positional relationship, when the turning lever 15a and the engaging claw 15b are not engaged with each other in the unlocked state,
The coil 17 is short-circuited by the reed switch 26 and oscillates at a second oscillation frequency different from the first frequency.

Further, when the turning lever 15a and the engaging claw 15b are engaged and locked in this state, the main controller 21 oscillates at a third different oscillation frequency, thereby causing the main controller 21 to move to the glass door 13a. It is configured so that it can be identified / monitored whether it is opened / closed or locked.

As described above, the transmission line for transmitting the monitoring information by the interaction of electromagnetic induction can be made wireless, but if the required transmission distance between the movable side circuit section 25 and the oscillator 20 becomes large, the coil 23 side will be. There is a problem that the location of the oscillator 20 is restricted because the reception level is significantly attenuated.

Therefore, for example, as a signal transmitting means for this kind of induced magnetic field, a constant magnetic field strength is obtained in a plane (X and Y directions) to widen the communication range, and for example, even in a trackless or unmanned vehicle. An applicable induction magnetic field type transporting device is disclosed in Japanese Patent Laid-Open No. 164817/1985.

[0009]

However, the above-mentioned proposal example is a means for obtaining a substantially constant magnetic field strength in the XY plane, so that this type of wireless security system is used. When applied to, for example, a sliding door like the above-mentioned conventional example, it can be applied, but for example, remote control information such as rotary doors or other types of general opening locks, fire information, etc. Transmission, etc. X-
When a communication range in the vertical height Z direction of the Y plane is required, its application range is limited.
The purpose is to provide a means for expanding the communication range in the height direction by obtaining a strong magnetic field that is substantially constant in the direction or outward from the center.

[0010]

Therefore, according to the present invention, a wireless security system of this kind is provided with a transmitter, a receiver, a controller, a display, and a plurality of magnetic fields arranged vertically in a vertical hierarchy. A control means having a transmission / reception antenna and a sensor means having a directional or omnidirectional magnetic field transmission / reception antenna, a resonator and a switch are provided, and a plurality of antennas of the control means are in-phase / phase-transmitted in a time division manner. It is intended to achieve the above-mentioned object by making the switchable to.

[0011]

With the above-described structure of the present invention, a strong magnetic field region that is substantially constant in the vertical direction of the antenna wire on the controller side or outward from the center thereof can be obtained, so that the communication range in the height direction can be expanded. .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A control system using an induction magnetic field transmitting / receiving antenna according to the present invention will be described below based on embodiments. FIG. 1 is a schematic configuration diagram of an embodiment of the control system,
FIG. 2 shows the controller section antenna configuration / operation explanatory view.

(Structure) In FIGS. 1 and 2, reference numeral 1 denotes an induction magnetic field transmission / reception control system (controller) for, for example, a lighting fixture. Reference numeral 2 is a signal generator for generating a plurality of signals having different frequencies and sequentially transmitting the signals at a predetermined cycle. Reference numeral 3 is a changeover switch for switching between transmission and reception at a predetermined cycle. A loop antenna formed by printing on a printed circuit board or the like for transmitting a signal sent from the signal generator 2 to space and receiving a reply (echo) from a remote control unit (hereinafter abbreviated as "remote control") 5. Reference numeral 6 denotes a sensor unit, and 6a denotes a remote controller 5
Inside is a coil, 6c is a capacitor, 6d is a crystal oscillator, and 7 is a switch for turning on / off the lighting equipment.

The coil 6a constitutes the directional induction magnetic field transmitting / receiving antenna A, and the coil 6a, the capacitor 6c, the crystal oscillator 6d and the switch 7 constitute the remote controller 5. Reference numeral 8 is a detection unit for the received signal sent from the changeover switch 3, 9 is a processing unit for this detection signal, and 10 is for controlling the turning on / off of the lighting equipment by turning on / off the switch 7 of the remote controller 5. Is a control unit of.

Further, f _{1 to} f _n are signals of a plurality of frequencies generated and transmitted by the signal generator 2, r _n are loop antennas 4a and 4 corresponding to the switching of the selector switch 3 at a predetermined cycle.
A signal that is returned from the sensor unit 6 in response to a transmission signal of the frequency f _n transmitted from b is a so-called echo, and P indicates a control panel of the controller 1.

The feature of this embodiment is that a plurality of loop antennas 4a and 4b are respectively arranged in the upper and lower layers, for example, on the ceiling and floor of a room, and the phase switch 3 is provided between the two.
0 is provided so that both can be switched to the in-phase / opposite phase in a time division manner, and the antenna A of the sensor unit 6 has directivity. As a result, FIG.
Compared with the case of the single loop antenna 4 shown in (c),
The in-phase / reverse-phase magnetic field of this embodiment is (a) /
(B) As shown in the figure, the magnetic flux F is chronologically (a) a strong magnetic flux F _{0 that} is substantially constant between both loops is obtained, or (b) the magnetic flux F is directed outward from the center in the vertical direction of the loop. It is possible to generate a strong magnetic field F ₀ .

(Operation) Next, the operation of the configuration will be described. First, when a power switch (not shown) of the control panel P of the controller 1 is turned on, the signal generator 2 sequentially outputs n different frequencies at a predetermined cycle. The signal outputs f _{1 to} f _n are transmitted from the plurality of loop antennas 4a and 4b by connecting the changeover switch 3 and connecting the contact a. At this time, the loop antennas 4a and 4b are connected in phase by the phase switcher 30.

Now, assuming that the frequency f _n is a frequency for lighting control, the loop antennas 4a and 4b are arranged in a predetermined cycle.
A signal current having a frequency f _n flows through the magnetic field, and a magnetic flux having a frequency f _n is generated by the signal current. At this time, the sensor unit 6 for lighting control having an inherent frequency selection characteristic that resonates with the frequency f _n turns on the switch 7. Resonate with. At this time, when the contact a of the selector switch 3 is switched to b at a predetermined timing, the loop antennas 4a, 4a,
The magnetic flux from 4b is extinguished, and an echo r _n is generated from the coils 6a and 6b of the sensor unit 6 which also serve as the antenna A. A signal current is generated in the loop antenna 4 of the controller 1 by the electromagnetic induction of the echo r _n , the signal current is received by the detecting unit 8, and the processing unit 9 controls the controlled device, that is, the illumination that has the frequency f _n as a unique frequency. Power is turned on / off. Next, the phase changer 30 is changed over and the loop antennas 4a and 4b are changed.
Are connected in reverse phase. The change-over switch 3 is subsequently switched from the contact b to the contact a, the signal current of the frequency f ₁ flows again from the signal generator 2 to the loop antennas 4a and 4b, and so on until the frequency of f _n is repeated again. Further, signal currents of different frequencies can be passed through the loop antennas 4a and 4b to perform on / off control of a plurality of controlled devices controlled by a unique control frequency. The loop antennas 4a and 4b are again connected in the same phase and repeat the frequencies f _{1 to} f _n .

As described above, control of a plurality of controlled devices,
For example, it becomes possible to accurately control opening / closing of a shutter, turning on / off of a light, and the like by remote control without needing to particularly consider directivity. The switching between in-phase and anti-phase may be performed for each frequency.

(Other Embodiments) Next, another embodiment in which the antenna A of the sensor unit 6 according to the present invention is non-directional will be described with reference to FIGS. 1 and 3. In order to make the antenna A omnidirectional, in addition to the coil 6a of the sensor unit 6, as shown in FIG.
As shown in the two circuit examples in (a) and (b), they are arranged at positions orthogonal to each other, that is, in a T-shape so that the mutual inductance becomes substantially zero. In this case as well, the same effects as shown in FIGS. 2 (a) and 2 (b) can be obtained as in the above-described embodiment.

[0021]

As described above, according to the present invention, a plurality of antennas of the control means of the wireless security system are arranged in, for example, vertical upper and lower hierarchies, and they are time-divisionally switched between in-phase and anti-phase. With this configuration, the communication range in the weight direction of the antenna wire can be expanded, and a wide range of applications such as locking of various openings, remote control information, and detection / monitoring of disaster prevention information have become possible.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a control system according to an embodiment.

FIG. 2 is an explanatory diagram of the antenna configuration / operation of the controller unit.

FIG. 3 is a diagram showing two examples of the sensor circuit in FIG.

FIG. 4 is a front view of an example of a conventional crime prevention system.

FIG. 5: Circuit block diagram

[Explanation of symbols]

1 controller 2 signal generator 4a, 4b loop antenna 5 remote controller A, A ₀ antenna 6 sensor 6a, 6b coil 7 switch 8 detector 9 processor 10 controller 30 phase switch

Claims (1)

[Claims] 1. A control means having a transmitter, a receiver, a controller, a display, and a plurality of magnetic field transmitting / receiving antennas vertically arranged in a vertical hierarchy, and a directional or omnidirectional magnetic field. A wireless security system comprising: a transmission / reception antenna, a sensor means having a resonator and a switch, and a plurality of antennas of the control means capable of switching between in-phase and phase-shifting in a time division manner.