JP2001109968A - Roaming person monitoring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To widen the monitoring area by preventing the generation of spots where high frequency radio waves can be received and can not be received. SOLUTION: Concerning the roaming person monitoring device 110 composed of a transmitter 120 carried with a roaming person for sending high frequency radio waves and a receiver 130 for judging the presence/absence of the roaming person within a prescribed area while having a high frequency receiving circuit 131 for receiving high frequency radio waves, a subordinate receiver 140 having a subordinate high frequency receiving circuit 141 is connected to the receiver and the receiver is provided with a control circuit 133 for starting the operation of the subordinate high frequency receiving circuit of the subordinate receiver by stopping the operation of the high frequency receiving circuit in the receiver when the receiver can not receive high frequency radio waves and judging the absence of the roaming person, who carries the transmitter, within the prescribed area when both the receiver and the subordinate receiver can not receive high frequency radio waves from the transmitter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wandering person monitoring device, and more particularly, to transmitting a high frequency radio wave from a transmitter carried by a wandering person and receiving the high frequency radio wave to determine whether the wandering person is within a predetermined area. It relates to a wandering person monitoring device for monitoring.

[0002]

2. Description of the Related Art Conventionally, a wandering person monitoring device as shown in FIG. 2 has been proposed to notify that a wandering person goes out of a predetermined area in a house, a nursing facility, or the like.

In FIG. 1, a wandering person monitoring device 210 includes
A transmitter 220 carried by a wanderer and transmitting high-frequency radio waves,
It is configured with a receiver 230 that determines whether or not the wandering person is present in the predetermined area depending on whether or not the high frequency radio wave can be received, and notifies the wandering person when the wandering person is not present in the predetermined area. I have.

The receiver 230 receives a high-frequency wave transmitted from the transmitter 220 and outputs a signal, and a control circuit for determining whether there is a signal output from the high-frequency reception circuit 231. 233 and the control circuit 2
A notifying unit 232 for notifying that the wanderer is not present in the predetermined area when a control signal is input from the control unit 33, and a power supply circuit 235 for supplying power to the high-frequency receiving circuit 231 are provided.

[0005] In the wandering person monitoring apparatus configured as described above, the transmitter 220 intermittently transmits a high frequency radio wave, and when the wandering person is present in a predetermined area, the high frequency radio wave is transmitted to the high frequency reception circuit. At 231, a signal is sent to the control circuit 233. When the signal transmitted from the high-frequency receiving circuit 231 is input, the control circuit 233 determines that the wandering person is present in the predetermined area, and performs control to maintain the monitoring state.

When the wanderer does not exist in the predetermined area, the high-frequency radio wave intermittently transmitted from the transmitter 220 cannot be received by the high-frequency receiving circuit 231 or cannot be correctly received. Is not sent. When the signal transmitted from the high-frequency receiving circuit 231 is not input, the control circuit 233 determines that the wandering person is not present in the predetermined area, and outputs a control signal to the notification unit 232. When the control signal is input, the notifying unit 232 outputs a sound or an image or turns on a light to notify that the wandering person is not present in the predetermined area.

In this type of receiver, a system in which power is simultaneously supplied to two high-frequency receiving circuits at the same time as in a space diversity system (Japanese Patent Laid-Open No. 6-1887).
No. 90) has also been proposed.

[0008]

However, in the conventional wandering person monitoring device, the reception state of the high-frequency radio wave from the transmitter varies depending on the location due to the pillars and walls of the building, etc., so that the location cannot be received. However, there is a drawback in that the monitoring area is narrowed. Further, a space diversity system has been proposed, but since power is supplied to two high-frequency receiving circuits simultaneously, current consumption is large and there is a problem in terms of energy saving.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned difficulties, and there are almost no places where high-frequency radio waves can be received and where there are no places where a high-frequency radio wave can be received. The purpose is to provide.

[0010]

In order to achieve the above object, a wandering person monitoring device according to the present invention comprises a transmitter for carrying a high frequency radio wave carried by a wandering person and a high frequency receiving circuit for receiving the high frequency radio wave. And a receiver for determining whether or not the wandering person is in the predetermined area, and a wandering person monitoring device, wherein a sub-receiver having a sub-high frequency receiving circuit is connected to the receiver, When the receiver cannot receive the high-frequency radio wave, the operation of the high-frequency reception circuit in the receiver is stopped, the operation of the sub-high-frequency reception circuit of the sub-receiver is started, and the high-frequency wave from the transmitter is transmitted to both the receiver and the sub-receiver. A control circuit is provided for determining that a wanderer carrying a transmitter is not present in a predetermined area when radio waves cannot be received.

According to such a wandering person monitoring apparatus, in the monitoring state of the wandering person, if the high frequency radio wave transmitted from the transmitter cannot be received by the receiver, the operation of the high frequency reception circuit of the receiver is stopped and the sub reception is stopped. The operation of the sub-high frequency receiving circuit of the receiver is started, and if the high-frequency radio wave can be received, the operation of the sub-high-frequency receiving circuit of the sub-receiver is stopped, and the operation of the high-frequency circuit of the receiver is started again to maintain the wandering person monitoring state. . If the high-frequency radio wave cannot be received when the operation of the sub-high-frequency receiving circuit of the sub-receiver is started, both the receiver and the sub-receiver cannot receive the high-frequency radio wave from the transmitter. It is determined that the wandering person has become non-existent in the predetermined area. In this way, the receiving position is two of the receiver and the sub receiver.
Therefore, even if there is a place where reception cannot be performed at one place, reception can be performed at another place. Therefore, a wandering person monitoring state can be maintained in a wide area without a place that can be received and a place that cannot be received due to a change in the reception state.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a wandering person monitoring apparatus according to the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 1, a wanderer monitoring apparatus 110 of the present invention carries a transmitter 120 carried by a wanderer (not shown) for transmitting high-frequency radio waves, receives high-frequency radio waves, and outputs a reception signal. And a receiver 130 having a high-frequency receiving circuit 131 for determining whether or not the wanderer is in a predetermined area.

The receiver 130 includes an auxiliary high-frequency receiving circuit 14
A sub-receiver 140 that operates when the receiver 130 cannot receive high-frequency radio waves is connected.

The receiver 130 monitors a received signal input from a high-frequency receiving circuit 131 for receiving a high-frequency wave, and when there is no signal input, the high-frequency receiving circuit 13 in the receiver 130 is monitored.
1 is stopped, the operation of the sub-high frequency receiving circuit 141 of the sub-receiver 140 is started, and the receiver 130 and the sub-receiver 1 are started.
When the high frequency radio wave from the transmitter 120 cannot be received by both of them, the wanderer carrying the transmitter 120 is determined to be non-existent in the predetermined area, and the wanderer carrying the transmitter 120 is not present in the predetermined area. And a control circuit 133 that outputs a control signal for notifying of the determination.

The receiver 130 has a control circuit 133.
When the output control signal is input, the notification unit 13 notifies the surroundings that the wanderer is not present in the predetermined area.
2, a high-frequency receiving circuit 131, a control circuit 133, a notification unit 132, a power supply circuit 135 for supplying power to the sub-high-frequency receiving circuit 141 of the sub-receiver 140, and the high-frequency receiving circuit 131 and the sub-high-frequency receiving under the control of the control circuit 133. Circuit 14
1 for switching the power supply to the power supply 1.

The sub-high frequency receiving circuit 141 in the sub-receiver 140 is configured to start operating when the high frequency radio wave cannot be received by the receiver 130 and to output a signal to the control circuit 133 when the high frequency radio wave can be received. .

In the wanderer monitoring apparatus configured as described above, the high frequency radio wave is intermittently transmitted from the transmitter 120. When the high frequency radio wave transmitted from the transmitter 120 is received by the high frequency receiving circuit 131, the control circuit 133 Output a signal to When the signal transmitted from the high-frequency receiving circuit 131 is input, the control circuit 133 determines that the wandering person is present in the predetermined area, and maintains the monitoring state.

When the high frequency receiving circuit 131 cannot receive the high frequency radio wave transmitted from the transmitter 120, the high frequency receiving circuit 131 does not output a reception signal to the control circuit 133.
The control circuit 133 does not receive a received signal from the high-frequency receiving circuit 131, and the control circuit 133 sends a power control signal to the power switching unit 134. The power supply switching unit 134 includes a control circuit 133
When the power supply control signal is input from the power supply circuit 135, the power supply from the power supply circuit 135 to the high-frequency reception circuit 131 through the power supply switching unit 134 is switched to supply the power to the sub-high-frequency reception circuit 141 of the sub-receiver 140. . The sub-high frequency receiving circuit 141 starts operating when power is supplied, and outputs a received signal to the control circuit 133 when receiving the high-frequency radio wave transmitted from the transmitter 120, and
When the reception signal is input, 3 judges that the wandering person is present in the predetermined area, and maintains the monitoring state.

However, the high-frequency radio wave transmitted from the transmitter 120 cannot be received by the high-frequency reception circuit 131, and the sub-high-frequency reception circuit 141 is supplied with power, starts operating, and transmits the high-frequency radio wave transmitted from the transmitter 120. When the sub-high frequency receiving circuit 141 cannot receive the
No signal is output to 3. Since no signal is input from the sub-high frequency receiving circuit 141 to the control circuit 133 and no signal is input from both the high frequency receiving circuit 131 and the sub-high frequency receiving circuit 141, no wandering person exists in the predetermined area. And outputs a control signal to the notifying unit 132. When the control signal is input, the notification unit 132 outputs a sound or an image, or emits light to notify that the wandering person is not present in the predetermined area.

When the notifying unit 132 notifies that the wandering person is not present in the predetermined area, the wandering person returns to the predetermined area and receives the high-frequency wave transmitted from the transmitter 120 at a high frequency. Circuit 131 or auxiliary high-frequency receiving circuit 1
When received at 41, the control circuit 133 determines that the wanderer is present in the predetermined area, outputs a control signal to the notifying unit 132 to stop the notifying operation, and performs control to maintain the monitoring state. . The notification unit 132 stops the notification operation when the control signal is input from the control circuit 133.

[0022]

As is apparent from the above description, according to the wanderer monitoring apparatus of the present invention, since the receiving position is two places of the receiver and the sub-receiver, even if there is a place where reception is not possible at one place, it occurs. Since the reception can be performed at another location, the monitoring state of the wandering person can be maintained in a wide area without generating a portion that can be received and a portion that cannot be received due to a change in the reception state.

As a secondary effect, switching of power supply to the high-frequency receiving circuit is performed as compared with the case where power is simultaneously supplied to two high-frequency receiving circuits as in a general space diversity system. As a result, current consumption is reduced, which contributes to energy saving.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a wandering person monitoring device according to the present invention.

FIG. 2 is a block diagram showing a conventional wandering person monitoring device.

[Explanation of symbols]

 110 ... Wanderer monitoring device 120 ... Transmitter 130 ... Receiver 133 ... Control circuit 140 ... Sub receiver 131 ... High frequency receiver 141 ... Sub high frequency receiver

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04Q 9/00 311 H04Q 9/00 311J 331B 331 H04B 7/26 E (72) Inventor Masahiko Takeda Nagoya, Aichi 2-18 Jinnocho, Atsuta-ku, Aichi F-term (reference) in Aiphone Co., Ltd. EA23 GA13 HA04 HA06 5K067 AA01 DD44 EE02 EE12 FF17 KK03

Claims (1)

[Claims] 1. A transmitter (120) carried by a loitering person for transmitting high-frequency radio waves, and a high-frequency receiving circuit (131) for receiving the high-frequency radio waves, and it is determined whether or not the loitering person is within a predetermined area. A wandering person monitoring device (110) comprising: a sub receiver (140) having a sub high frequency reception circuit (141); and the receiver comprises: When the high frequency radio wave cannot be received by the receiver, the operation of the high frequency receiving circuit in the receiver is stopped, the operation of the sub high frequency receiving circuit of the sub receiver is started, and the receiver and the sub receiver are operated. A control circuit (133) for judging that the wanderer carrying the transmitter is not present in the predetermined area when both cannot receive the high-frequency radio wave from the transmitter. apparatus.