JPH0725490U - Wireless search device - Google Patents

Abstract

(57) [Summary] [Purpose] Using the characteristics of radio signals, the locations of elderly people with dementia, pets, and climbers who have been lost can be easily identified. [Structure] Vibration energy E such as a high frequency wave of a predetermined frequency output from a portable radio device 2 is received by a search radio device 6 provided at a plurality of search bases, and received by each search radio device 6. The position specifying device 10 determines the transmission direction of the vibration energy E.
Thus, for example, by using triangulation, it is possible to easily specify the position of an elderly person with dementia and the like who has gone missing accurately. Further, by displaying the position of the elderly with dementia or the like identified by the position identifying device 10 on the display 11, the current position of the elderly with dementia or the like can be accurately read.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wireless search device, and more particularly to a wireless search device that searches for a missing elderly person with dementia, a pet or the like by using a wireless signal.

[0002]

[Problems to be solved by conventional techniques and devices]

 Conventionally, there is no method or device to prevent the dementia elderly people, pets, and mountaineers, etc., even though they may be missing. In particular, elderly people with dementia act unconsciously beyond the scope of normal aging, as they have problems with memory, thinking, understanding, calculation, learning, language, and the ability to discriminate between places and times called judgment and orientation. It is very common for people to go missing due to wandering.

In order to prevent such a situation, the caregiver must constantly monitor the behavior of the elderly with dementia, which is a psychological and physical burden.

[0004]

【Purpose】

 The present invention has been made to solve such a conventional problem, and it is possible to easily specify the position of a demented elderly person who has been lost by utilizing the characteristics of a radio signal. An object of the present invention is to provide a wireless search device that can be used.

[0005]

[Means for Solving the Problems]

 The wireless search device of the present invention which achieves such an object is provided with a portable wireless device that transmits a wireless signal of a predetermined frequency and a plurality of search bases, and receives wireless signals from the portable wireless device. The search radio and the position specifying means for specifying the position of the search target in which the portable radio is placed based on the transmission direction of the radio signal received by the search radio, and the position specifying means. The image display means for displaying the position of the search target on the image. The position specifying means of such a wireless search device uses triangulation, the search radio transmits a radio signal different from a radio signal of a predetermined frequency, and the portable radio transmits from the search radio. When the input level of the wireless signal is lower than a certain level, the wireless signal of a predetermined frequency is transmitted to multiple search sites.

[0006]

[Action]

 A wireless signal of a predetermined frequency transmitted from a portable wireless device is received by a searching wireless device provided at each search base, and the direction of transmission of the wireless signal of a predetermined frequency received by each searching wireless device is determined by the position identifying means. Accurately specify the position of the search target by using, for example, triangulation. By displaying the position of the search target specified by the position specifying device on the video display device, the current position of the missing search target can be easily searched for. Furthermore, if the portable radio has a function of transmitting radio signals of a specified frequency to multiple search bases when the input level of the radio signal transmitted from the search radio falls below a certain value, the search target will be lost. It becomes possible to easily judge whether or not there is a possibility of becoming unclear.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. The wireless search device 1 shown in FIG. 1 includes a portable wireless device 2 that transmits a wireless signal of a predetermined frequency, and a search wireless device 6 that receives a wireless signal from the portable wireless device 2.

The portable wireless device 2 is arranged at a predetermined position of a demented elderly person cared for by a caregiver, for example. Such a portable radio 2 is provided with a transmission circuit 3 for transmitting a radio signal of a predetermined frequency, and the radio signal of the predetermined frequency is an analog signal wave AM generated as a change in the amplitude or frequency of the oscillator. : An FM signal wave or a signal generated by a code generator using a pulse signal may be used. Further, a wave transmitter 5 is provided which outputs these signal waves or signals as they are or on carrier waves and outputs them as vibration energy E such as high frequency waves, electromagnetic fields and ultrasonic waves. Further, the portable wireless device 2 is provided with a battery 4 connected to charging terminals T ₁ and T ₂ for driving these. The battery 4 is a nickel-cadmium battery, a secondary lithium battery, or the like, and is charged by connecting the charging terminals T ₁ and T ₂ to a power supply device (not shown) to form a power supply for driving the transmission circuit 3 and the like. There is.

The portable wireless device 2 is, for example, a pendant type portable wireless device that can be hung from the neck of a demented elderly person who is a carrier, a card type portable wireless device that can be easily placed on clothes, or What can be carried at all times, such as a wrist watch type portable radio that can be worn on the arm, is preferable for the elderly with dementia. On the other hand, the search radio 6 is set in advance, for example, in search bases A, B, C and D as shown in FIG. 2 in which areas where the elderly with dementia may wander are set in advance. Such a search radio 6 is data transmitted as vibration energy E such as high frequency waves, electromagnetic fields and ultrasonic waves transmitted from the transmitter 5 of the portable radio 2 placed at a predetermined position of the elderly with dementia. And a wave receiver 9 for receiving the wave. The wave receiver 9 is composed of an antenna that receives the vibration energy E and outputs AC power, a coupler such as a coil, or a sound receiving body. The wave receiver 9 preferably has a sharp directivity in order to accurately specify the source of the vibration energy E output from the portable wireless device 2.

A receiver circuit 7 is connected to the wave receiver 9. The receiving circuit 7 is connected to an AC power source, connected to a power supply unit 8 for converting the supplied AC power into DC power and driving the receiving circuit 7 and the like, and further connected to a position specifying device 10 which is position specifying means. Has been done. The position identifying device 10 uses the position data generated by the search radios 6 installed in the search bases A, B, C, and D to determine the current position of the elderly with dementia in which the portable radio 2 is installed. It has a function to calculate. For example, the transmission direction of the vibration energy E output from the portable radio device 2 received at the search base A and placed at the predetermined position of the elderly with dementia, and the placement at the predetermined position of the elderly with dementia received at the search base B. The present position of the elderly with dementia can be accurately determined by using triangulation based on the transmission direction of the vibration energy E output from the portable wireless device 2.

Specifically, if the length z ₁ between the search bases A and B and the angles α ₁ and β ₁ are measured, the other two sides, the search base A, the length b between the demented elderly Z and the search base The length a between the B and the elderly with dementia Z can be obtained as follows by the law of trigonometric sine proportionality. gamma ₁ = 180 ° _{-α 1 -β 1 a / sinα 1} = b / sinβ 1 = z 1 / sinγ 1 ∴ a = z 1 / sinγ 1 · sinα 1 b = z 1 / sinγ 1 · sinβ 1 ... (1 ) Further, the length z ₂ between the search stations B and D and the angles α ₂ , β ₂ and the length z ₃ between the search stations D and C and the angles α ₃ and β ₃ are also the same as in the formula (1), It is possible to calculate the length d between the search station D and the elderly with dementia Z, and the length c between the search station C and the elderly with dementia Z. As a result, the current position of the elderly with dementia can be accurately specified. Further, the position specifying device 10 has a function of displaying the calculated current position on the map. This function stores map data such as the map database used in the car navigation system, and clearly indicates the position of each search base A, B, C, D. The position specifying device 10 having such a function is connected to the display 11 which is an image display means.

A method for searching for a missing demented elderly person by the wireless search device 1 configured as described above will be described. When a demented elderly person having a portable radio 2 that outputs a vibration energy E such as a high frequency of a predetermined frequency and an electromagnetic field and an ultrasonic wave at a predetermined location is missing, each search base A, The search is started by the search radio 6 installed in B, C, and D. The wave receiver 9 of the search radio 6 of the search bases A, B, C, D receives the vibration energy E output from the wave transmitter 5 of the portable radio 2, and uses this vibration energy E as AC power. And output to the receiving circuit 7. The receiving circuit 7 generates position data based on this AC power, and uses this position data by using a CATV (community antenna television) line or telephone line as shown in FIGS. 3 (a) and 3 (b). Output to the position identifying device 10. The position specifying device 10 calculates the position data of the current position of the elderly with dementia captured by the search radios 6 of the search bases A, B, C and D, and outputs it to the display 11. Since the display 11 can display the current position calculated by the position specifying device 10 on the map, the current position of the elderly with dementia can be accurately read.

Although the portable wireless device 2 of the wireless search device 1 according to the present embodiment uses only transmission, and the search wireless device 6 uses only reception, the present invention is not limited to this. As described above, the portable wireless device 2 may include the wave receiver 23, the demodulator 21, and the input level determination circuit 22, and the search wireless device 6 may include the wave transmitter / receiver 25 and the transmission / reception circuit 24. As a result, when an elderly person with dementia having the portable radio 2 placed at a predetermined location is separated by a certain distance, the high frequency, electromagnetic field and ultrasonic waves output from the transmitter / receiver 25 of the search radio 6 are detected. The input level of the vibration energy E ₁ becomes a certain value or less, and the input level determination circuit 22 of the portable wireless device 2 causes the transducer 25 to output the vibration energy E ₂ based on the vibration energy E ₁ . Therefore, it is possible to easily determine whether or not the elderly with dementia in which the portable radio 2 is placed may be missing.

Further, the communication means between the portable radio and the search radio may be made to communicate via a satellite. It goes without saying that the wireless search device used in this manner can be applied not only to the search for the elderly with dementia but also to the emergency search of climbers, pets such as dogs and cats.

[0015]

[Effect of device]

 As is clear from the above embodiments, according to the wireless search device of the present invention, a portable wireless device that transmits a wireless signal of a predetermined frequency and a portable wireless device that is provided at a plurality of search bases are provided. A search wireless device that receives a wireless signal, a position specifying device that specifies the position of the search target where the portable wireless device is placed based on the transmission direction of the wireless signal received by the search wireless device, and position specifying It consists of video display means for displaying the position of the search target specified by the means on the image, and since the position specifying means uses triangulation, it can easily search the current position of the missing search target. be able to. Also, the search radio transmits a radio signal that is different from the radio signal of the specified frequency, and the portable radio transmits to multiple search bases when the input level of the radio signal transmitted from the search radio falls below a certain value. By providing a function of transmitting a radio signal of a predetermined frequency, it becomes possible to easily determine whether or not the search target may be missing.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a wireless search device according to the present invention.

FIG. 2 is an explanatory view showing the operation of the wireless search device of the present invention.

FIG. 3 is an explanatory view showing the operation of the wireless search device of the present invention.

FIG. 4 is a block diagram showing another embodiment of the wireless search device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Wireless search device 2 ... Portable radio 3 ... Transmission circuit 4 ... Battery 5 ... Wave transmitter 6 ... Search radio 7 ... Reception circuit 8 ... Power supply unit 9 ... Wave receiver 10 ... Position specifying device (position Specific means) 11 ... Display (video display means) 21 ... Demodulator 22 ... Input level determination circuit 23 ... Wave receiver 24 ... Transceiver circuit 25 ... Transceiver

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Aoki 1215 Shinba-cho, Kohoku-ku, Yokohama-shi, Kanagawa O-tax Co., Ltd.

Claims (3)

[Scope of utility model registration request] 1. A portable radio which transmits a radio signal of a predetermined frequency, a search radio which is provided at a plurality of search bases and receives the radio signal from the portable radio, and the search radio. Position specifying means for specifying the position of the search target in which the portable wireless device is arranged based on the transmission direction of the wireless signal received by the machine, and an image of the position of the search target specified by the position specifying means. A wireless search device comprising: a video display means for displaying on a screen. 2. The wireless search device according to claim 1, wherein the position specifying means uses triangulation. 3. The search radio device transmits a radio signal different from the radio signal of the predetermined frequency, and the portable radio device has an input level of the radio signal transmitted from the search radio device below a certain value. In this case, the wireless signal of the predetermined frequency is transmitted to the plurality of search bases.
The wireless search device described.