JPH11161885A - Egress/ingress monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an egress/ingress monitoring system simplifying the struction of a detected means, having inexpensive and thinned structure and improving environmental resistance. SOLUTION: An operation part 14 in a transmitter/receiver 1 measures the intensity of a radio wave (remaining radio wave) outputted from a resonance tag 2 in a state delayed from the stop of radio wave transmission from a transmission part 12 and a phase difference between a received radio wave and a transmitted radio wave based on the received radio wave received by a receiving part 13, quantizes the measured result and applies the quantized data to a CPU 11. The CPU 11 is provided with a function for discriminating the existence of the specific resonance tag 2 in a radio wave transmission area by comparing the quantized characteristic applied from the operation part 14 with the previously stored inherent characteristic of the tag 2 and outputting the identification data of the specific resonance tag 2 to an output part 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an entry / exit monitoring system for monitoring the entry / exit of a cared person or the like in an insurance facility for the elderly, a welfare facility, a welfare facility, or a general household.

[0002]

2. Description of the Related Art Conventionally, in elderly care facilities, welfare facilities, general households, etc., when it is necessary to monitor the incoming and outgoing of a cared person who is an internal monitoring target, a monitoring system is installed in each facility and home. . This conventional monitoring system is composed of a transmitting device, a response signal output device, a receiving device, an alarm monitoring device, and the like. The response signal output device is used by a care receiver to be carried or worn by a care receiver. It has a structure for transmitting radio waves.

[0003]

However, in the conventional monitoring system, the receiver receives radio waves transmitted from a response signal output device that is carried or attached to a wearable object and recognizes the care receiver. Since the response signal output device requires a power source such as a battery or uses electronic components such as an IC memory element, it has a certain thickness and it is difficult to make it thinner, There was a problem in that it was disturbed in daily life and was disliked to carry, or even when attached to a wearable object, it was uncomfortable and removed by the cared person, and the cared person's entry and exit could not be detected. In addition, the conventional response signal output device has poor durability due to its structure, and responds to the environment in the daily life of the care receiver, such as washing when the transmitter is attached to the wear or shock when the transmitter is attached to the wear. The signal output device may be destroyed and not function as a monitoring system. When the response signal output device is attached to the wearer's wearable object, it must be attached to all the wearers used by the care receiver, and the response signal output device as described above is relatively expensive. However, it was economically difficult to introduce such a system.

[0004] Further, there is a problem that an antenna for transmitting and receiving a radio wave has poor sensitivity depending on a position where the response signal output device is attached and an angle with the antenna. The transmitting and receiving antennas in the conventional monitoring system have a fixed shape, and their positions and angles cannot be flexibly changed depending on the position where the response signal output device is attached, resulting in poor transmission and reception sensitivity. There was something. In addition, the conventional antenna gives an impression to the cared person and others that monitoring is being performed, and causes discomfort.

The present invention has been made in view of the above problems, and an object of the present invention is to simplify the structure of the means to be detected, to reduce the cost and to reduce the thickness. It is an object of the present invention to provide an entry / exit monitoring system which is designed to have excellent environmental resistance. It is another object of the present invention to provide an access monitoring system capable of identifying and identifying a plurality of detected means and monitoring entry and exit of a plurality of monitoring targets, in addition to the above object. It is in.

A third object of the present invention is to provide, in addition to the objects of the first and second aspects of the present invention, an entry / exit monitoring system which has excellent noise immunity characteristics and does not malfunction due to noise. The object of the invention of claim 4 is that
It is an object of the present invention to provide an access monitoring system capable of making transmission antennas and reception antennas of a transmission / reception means inconspicuous.

The object of the invention of claims 5 to 7 is, in addition to the object of the invention of claim 4, to prevent the fact being monitored, in particular, from being noticed by the monitored object or other persons. It is an object of the present invention to provide an access monitoring system.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, a resonance circuit is provided on an insulator to resonate when present in a field where a radio wave of a resonating frequency is emitted. A means for generating a signal, and transmits a radio wave of a predetermined frequency to the place set at a predetermined entry / exit monitoring place and set around the entrance / exit monitoring place, and performs a receiving operation in synchronization with the transmission of the radio wave, Transmitting radio waves, and transmitting and receiving means for identifying that there is a specific detected means in the field from the characteristics obtained based on the received radio waves including radio waves generated from the detected means present in the field, The detection means is attached to a monitoring target.

According to a second aspect of the present invention, in the first aspect of the present invention, a plurality of detected means each having a different resonance frequency are used as the detected means, and transmission is performed from a transmitting / receiving means to a place set around an entry / exit monitoring location. The frequency of the transmission radio wave is switched at a predetermined period so as to correspond to the resonance frequency of each of the detected means. According to a third aspect of the present invention, in the first or second aspect, the characteristic is a phase difference between a radio wave transmitted from the transmitting and receiving means and a received radio wave, and a reception intensity of a residual radio wave received after the transmission is stopped. Wherein the characteristic is identified and identified by comparing the characteristic with the characteristic characteristic of the resonance tag stored in advance.

According to a fourth aspect of the present invention, in the first aspect, the transmitting antenna and the receiving antenna of the transmitting / receiving means are arranged on the same plane. According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the transmitting antenna and the receiving antenna of the transmitting / receiving means are incorporated in the mat. According to a sixth aspect of the present invention, in the fourth aspect, the transmitting antenna and the receiving antenna of the transmitting / receiving means are incorporated in the goodwill.

According to a seventh aspect of the present invention, in the fourth aspect of the present invention, the transmission antenna and the reception antenna of the transmission / reception means are incorporated in the door frame.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments. (Embodiment) FIG. 1 is a view showing an embodiment of the present invention. In this figure, the system is roughly divided into a transceiver 1 as a transmitting / receiving means, a resonance tag 2 as a detected means, and an alarm monitoring device 3 And a transmitting antenna 4 and a receiving antenna 5.

The transmitter / receiver 1 is installed at a predetermined entry / exit monitoring place such as an entrance to the outside of a home for the elderly, a welfare facility, a general home, or a dangerous place.
0, timing signal output unit 11, transmission unit 12, reception unit 1
3, an operation unit 14, and an output unit 15. The timing signal output unit 11 outputs a timing signal at a fixed timing (several micro to several tens of micro seconds). The transmission unit 12 generates a radio wave of a specific frequency based on the timing signal, and the transmission antenna 4 A radio wave is transmitted to a predetermined place at a predetermined access monitoring place.

The receiving section 13 is a timing signal output section 1
It operates in synchronism with the timing signal from No. 1 and has a function of amplifying the received radio wave received by the receiving antenna 5 and specifying the frequency of the radio wave. The calculation unit 14
Based on the received radio wave received by the receiving unit 13, the transmitting unit 1
Since the transmission of the radio wave at 2 stops, the intensity of the radio wave (remaining radio wave) output from the resonance tag 2 with a delay, the received radio wave,
A phase difference from the transmitted radio wave is measured, and the measurement result is quantized and provided to the CPU 11 as described later.

The CPU 11 quantizes the characteristic given by the arithmetic unit 14 and stores the characteristic of each resonance tag 2 stored in advance.
And a function of identifying the existence of the specific resonance tag 2 in the radio wave transmission area and outputting the identification data of the specific resonance tag 2 to the output unit 15 by comparing the characteristic characteristics of the specific resonance tag 2 with the specific characteristics of the specific resonance tag 2 as described later. I have. The output unit 15 is a specific resonance tag 2
Is output to the external alarm monitoring device 3.

The alarm monitoring device 3 is installed in a monitoring room or the like, and associates the identification information of the resonance tag 2 detected by the transceiver 1 with the identification information of the resonance tag 2 stored in the alarm monitoring device 3 in advance. A warning rank or the like of the care receiver is determined based on the personal information, and a display device such as a CRT (not shown)
And a function for notifying the administrator that the cared person has entered and exited by generating a warning sound, and the time information and the identification information of the resonance tag 2 at that time. It has a function of storing the caregiver's personal information and later confirming the in-and-out situation of the care receiver.

The structure of the resonance tag 2 is as shown in FIG.
It is composed of a closed circuit composed of an inductor component L and a capacitance component C having a single resonance frequency (approximately 100 kHz to several hundred MHz), and is designed and manufactured in advance based on electrical characteristics. Is calculated by the following formula, and approximately 5
Set to 0 to 100 or more. At this time, harmonics are not considered.

FIG. 3 shows an example of the resonance tag 2 used in the present embodiment. As shown, the resonance tag 2 has a specific dielectric constant P
Metal surfaces such as Al, Cu, Au, and Ag are formed on both sides of a film-shaped insulator 20 made of a resin such as ET, PP, and PI. 21b and the electrode patterns 22a and 22b forming the capacitance component C with the insulator 20 interposed therebetween from both sides.
0, one end of the coil pattern 21a on one side is integrally connected to the electrode pattern 22a formed on the one side, and one end of the coil pattern 21a on the other side is integrated with the electrode pattern 22b formed on the other side. The other ends of the coil patterns 21a and 21b are connected to each other by penetrating the insulator 20 to form an equivalent circuit of FIG. The metal surface may be covered with the insulator 20 for protection.

Here, the natural frequency of the LC circuit shown in FIG. 2 is defined by the following equation. f = 1 / [2π√ (LC)] Accordingly, the natural frequency of the resonance tag 2 depends on the number of turns of the coil pattern 21, the area of the electrode patterns 22a and 22b, and the insulator 2
It is uniquely determined by a thickness of 0. Design and manufacture are performed in consideration of these characteristics.

The film-shaped resonance tag 2 configured as described above can be attached to clothes or footwear of a care-receiver to be monitored, attached to a wheelchair or a walking stick, or embroidered with an emblem or embroidery. It is configured as a part. An antenna element 4a of the transmitting antenna 4 and a receiving antenna 5
In this embodiment, the antenna elements 5a are opposed to each other at a predetermined distance as shown in FIG.

Next, the operation of this embodiment will be described in detail with reference to FIGS. First, in the present embodiment, tags having ten different resonance frequencies are used as the resonance tags 2. That is, the resonance tags 2 from CH-1 to CH-10 can be identified. Of course, the number of types is not limited. Here, the transceiver 1 performs an operation of sequentially scanning each frequency from CH-1 to CH-10 at regular intervals as shown in FIG.

The radio wave transmitted here is not continuously variable (an analog type), but has a variable frequency with discrete values.
For example, if the frequency is in the 5 MHz band, 5.00 MH
.., 5.01 MHz, 5.02 MHz,... Each C
H is constant consists of a spot of the frequency width (depending on frequency), for example constituted by a CH-1 at 17 spots as shown in FIG. _{5 (b) (f 10,} f 11 ... f 11 6) Is done.

Further, in order to eliminate the influence of white noise and impulse noise, spots of the same frequency have a predetermined period (T1 = several tens of microseconds) and a predetermined time (T2 = several microseconds).
The radio wave is transmitted intermittently in the width of (seconds). That is, FIG.
The transmitting section 12 operates based on the timing signal of the timing signal output section 11 shown in (c), and a radio wave of a predetermined frequency having a waveform shown in FIG. Fired.

If the resonance tag 2 does not exist in a predetermined place (antenna sensing area) of the entry / exit monitoring place where such a radio wave is emitted, no reflected radio wave is generated by resonance of the resonance tag 2 so that the receiving antenna 5 Only the transmitted radio wave arrives at, and the waveform of the received radio wave input to the receiving unit 13 is as shown in FIG. In this case, the phase of the waveform of the received radio wave is constant with respect to the phase of the transmitted radio wave, and there is no remaining radio wave generated by the resonance of the resonance tag 2. The operation unit 14 transmits the radio wave transmitted from the transmission unit 12 and the resonance tag 2
Measures and calculates the phase difference from the received radio wave including the radio wave due to the resonance of the radio wave, integrates the intensity of the remaining radio wave within the same frequency, and samples between spots within the frequency width to calculate the phase difference. Results and sampling values are transferred to the CPU
10 to send. The CPU 10 sets the peak value at the center frequency and the attenuation rate from the center frequency to a certain allowable value based on the variation rate of the phase difference in the frequency band and the frequency-residual wave intensity level characteristics obtained from the above sampling result. The function of performing the process of identifying the presence or absence of the resonance tag 2 and identifying the presence of the resonance tag 2 is provided as described above.
Does not exist in a predetermined place at the entry / exit monitoring place, the phase difference is constant, so it is determined that the resonance tag 2 does not exist, and the identification information is not sent to the alarm monitoring device 3.

Here, when a care receiver with the resonance tag 2 is present at a predetermined place in the entry / exit monitoring place, the reflected radio wave due to the resonance of the resonance tag 2 is transmitted by the transmission antenna 4 and transmitted. The signal arrives at the receiving antenna 5 together with the radio wave and is received. FIG. 5E shows the waveform of the received radio wave. The phase difference between the received radio wave and the transmitted radio wave in the section P1 in FIG. 5F is different from the phase difference when the resonance tag 2 is not present. Are different. In addition, the radio wave from the resonance tag 2 is delayed, and is received as a remaining radio wave as in the section P2.

The arithmetic unit 14 fetches the received radio wave through the receiving unit 13 and performs the above-described measurement of the phase difference, integration of the intensity of the remaining radio wave, and sampling processing.
The result is sent to PU10. The CPU 10 determines from the calculation result of the phase difference from the calculation unit 14 that the rate of change of the phase difference of the received radio wave with respect to the transmission radio wave is equal to or more than a predetermined value within the frequency band.
The CPU 10 determines that the resonance tag 2 is present at a predetermined place in the entry / exit monitoring place, and further compares the characteristic indicated by the sampling result with the characteristic stored in the resonance tag 2 stored in advance.

Here, the characteristic shown by the sampling result is shown in FIG. 6, where f _{10 to} f _1n indicate the frequency of each spot within the same frequency, and the center frequency
From the peak value of the intensity of the remaining radio wave at (f _{1C in the} figure), a predetermined frequency range d ₁ (half width) from the center frequency f _1C
Is set within the range of an allowable attenuation rate set corresponding to the characteristic characteristic of the resonance tag 2 of each CH, and the manufacturing variation is taken into consideration. The CPU 10 compares and determines whether the attenuation rate within the frequency range d3 is within a predetermined range, and thereby identifies the resonance tag 2 having a unique characteristic corresponding to the characteristic. This identification information is sent to the alarm monitoring device 3 through the output unit 15.

The alarm monitoring device 3 is installed in a monitoring room or the like, and identifies the resonance tag 2 transmitted from the CPU 10 of the transceiver 1 through the output unit 15 and the alarm monitoring device 3.
Based on the personal information associated with the identification information of the resonance tag 2 stored in advance, a warning rank or the like of the care receiver is determined, and a warning is displayed on a display device (not shown) such as a CRT as described above. Along with the display, a warning sound is generated to notify the manager that the care receiver has gone in and out. At the same time, personal information of the care receiver associated with the time information at that time and the identification information of the resonance tag 2 is stored. The stored information can be called later by the observer to confirm the entry / exit status of the care receiver.

Although the transmitting antenna 4 and the receiving antenna 5 are arranged to face each other in the above embodiment, they can be arranged on the same plane as shown in FIG. As shown in FIG. 8, the plurality of antenna elements 5 of the reception antenna 5 are coplanar with the antenna element 4a of the transmission antenna 4.
a ... may be arranged and incorporated in the mat 20 placed at the entrance or the like so that the care receiver to be monitored or other persons may not notice the monitoring.

As shown in FIG. 9, the transmitting antenna 4 is attached to the hanging cloth (sheet) 30a of the curtain 30 which is hung at the doorway.
Even if the antenna element 4a of the receiving antenna 5 and the antenna element 5a of the receiving antenna 5 are incorporated, similarly to the mat 20, it is possible to prevent the care receiver to be monitored or other persons from noticing the monitoring. Further, as shown in FIG. 10, the antenna element 4a of the transmitting antenna 4 and the antenna element 4b of the receiving antenna 5 may be incorporated in a door frame 40a in which the door 40 is fitted.

Although the resonance tag 2 is attached to the cared person in the embodiment, the object to be monitored is an article, and the article is attached to the resonance tag 2 so that the type of the article to enter or leave can be identified. It is also possible to build an access monitoring system that can do this.

[0032]

According to the first aspect of the present invention, there is provided a detecting means for providing a resonance circuit on an insulator, resonating and generating a radio wave when present in a field where a radio wave of a resonating frequency is emitted, A radio wave of a predetermined frequency is transmitted to the place set at the monitoring location and set around the entry / exit monitoring place, and a receiving operation is performed in synchronization with the transmission of the radio wave, and the transmitted radio wave and a detected object existing in the place are detected. Transmitting / receiving means for identifying the presence of a specific detected means in the field from characteristics obtained based on received radio waves including radio waves generated from the means, and attaching the detected means to a monitoring target. Since the detection means attached to the monitoring target has a structure in which only a resonance circuit is provided on an insulator, it can be made inexpensive and thin, has high durability, and has a high durability in a normal environment. Also for monitoring The band can be secured, and especially when the monitored object is a cared person, the reliability of carrying the cared person in the environment in the daily life of the cared person can be enhanced, and the detection means is destroyed. This is advantageous in that it is possible to avoid being unable to function as a monitoring system.

According to a second aspect of the present invention, in the first aspect of the present invention, a plurality of detected means each having a different resonance frequency are used as the detected means, and transmission is performed from a transmitting / receiving means to a place set around an entry / exit monitoring location. Since the frequency of the transmission radio wave is switched at a predetermined cycle so as to correspond to the resonance frequency of each of the above-mentioned detected means, a plurality of detected means having resonance circuits having different resonance frequencies can be detected and identified, so that a plurality of monitoring targets can be identified. It has the effect of being able to monitor.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, the characteristic is such that the phase difference between the radio wave transmitted from the transmitting / receiving means and the received radio wave, and the residual radio wave received after the transmission is stopped. Of the received signal, and the characteristic is compared with the characteristic characteristic of the resonance tag stored in advance to identify the detected means. Therefore, the anti-noise performance is high. There is an effect that malfunction can be prevented.

According to a fourth aspect of the present invention, in the first aspect of the present invention, since the transmitting antenna and the receiving antenna of the transmitting / receiving means are arranged on the same plane, the space for installing the antenna can be reduced. The transmission antenna and the reception antenna of the transmission / reception means are incorporated in the mat as in the invention of the fifth aspect, and the transmission antenna and the reception antenna of the transmission / reception means are incorporated in the curtain as in the invention of the sixth aspect. In addition, by incorporating the transmission antenna and the reception antenna of the transmission / reception means in the door frame, there is an effect that the person being monitored and other persons do not notice that the monitoring is being performed, and do not give any discomfort.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of an embodiment of the present invention.

FIG. 2 is an equivalent circuit diagram of a resonance circuit of the above resonance tag.

FIG. 3A is a front view of the resonance tag according to the first embodiment.
(B) is a back view of the resonance tag of the above. (C) is an AA sectional view of (a). (D) is BB of (a)
It is sectional drawing.

FIG. 4 is a diagram illustrating an example of arrangement of a transmitting antenna and a receiving antenna according to the first embodiment;

FIG. 5 is a timing chart for explaining the above operation.

FIG. 6 is an explanatory diagram showing a relationship between the intensity of the remaining radio wave and the frequency according to the embodiment;

FIG. 7 is a diagram illustrating another example of the arrangement of the transmission antenna and the reception antenna according to the first embodiment;

FIG. 8 is an exploded perspective view of a mat in which the transmitting antenna and the receiving antenna are assembled.

FIG. 9 is an exploded perspective view of a goodwill incorporating the transmitting antenna and the receiving antenna according to the first embodiment.

FIG. 10 is a schematic configuration diagram of a door frame in which the transmitting antenna and the receiving antenna are assembled.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 transceiver 2 resonance tag 3 alarm monitoring device 4 transmission antenna 5 reception antenna 10 CPU 11 timing signal output unit 12 transmission unit 13 reception unit 14 operation unit 15 output unit

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI G08B 13/24 H04B 5/00 Z H04B 5/00 G01V 3/00 E (72) Inventor Riki Shimamura 5-chome Tateishi, Katsushika-ku, Tokyo No. 11-16 Inside Sensor Technos Co., Ltd. (72) Inventor Riki Sakamoto 5-11-16 Tateishi, Katsushika-ku, Tokyo Inside Sensor Technos Co., Ltd.

Claims (7)

[Claims] 1. A detecting means for providing a resonance circuit on an insulator, resonating and generating a radio wave when present in a field where a radio wave of a resonating frequency is emitted, and a detection means installed at a predetermined access monitoring location A radio wave of a predetermined frequency is transmitted to the place set in the vicinity of the monitoring place, and the receiving operation is performed in synchronization with the transmission of the radio wave, and the transmission radio wave and the radio wave generated from the detected means existing in the place are included. Transmission / reception means for identifying the presence of a specific detected means in the field from characteristics obtained based on received radio waves, wherein the detection means is attached to a monitored object. Monitoring system. 2. A method according to claim 1, wherein a plurality of detected means having different resonance frequencies are used as said detected means. 2. The access monitoring system according to claim 1, wherein the switching is performed at predetermined intervals so as to correspond to the frequency. 3. The characteristic is a phase difference between a radio wave transmitted from the transmission / reception means and a received radio wave, and a reception intensity of a residual radio wave received after the transmission is stopped. 3. The access monitoring system according to claim 1, wherein the detected means is specified and identified by comparing with a characteristic characteristic of a certain resonance tag. 4. The access monitoring system according to claim 1, wherein the transmitting antenna and the receiving antenna of the transmitting / receiving means are arranged on the same plane. 5. The access monitoring system according to claim 4, wherein the transmitting antenna and the receiving antenna of the transmitting / receiving means are incorporated in the mat. 6. The access monitoring system according to claim 4, wherein a transmission antenna and a reception antenna of the transmission / reception means are incorporated in the curtain. 7. The access monitoring system according to claim 4, wherein the transmission antenna and the reception antenna of the transmission / reception means are incorporated in the door frame.