JP2001243569A - Losing preventing and detecting device and terminal and lost object finding supporting terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve convenience in the case of assuming many carrying items and to reduce power consumption. SOLUTION: In a system composed of terminals 150 and a detector 100 for monitoring the terminals 150, the terminal 150 is provided with an identifier capable of identifying each terminal and a means for collating the identifier provided in itself with the identifier included in an inquiry radio wave at the time of receiving the inquiry radio wave and transmitting the identifier provided in itself as a response radio wave in the case that they match. The detector 100 is provided with the means for registering and preserving the identifiers capable of identifying the respective terminals, the means for turning the registered identifier of the terminal to the inquiry radio wave and transmitting it, the means for collating the identifier of the terminal with the identifier of the terminal transmitted as the radio wave and judging that a response is present when they match and the means for reporting that no terminal is present nearby in the case that no response is present within fixed time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a function for preventing theft or loss of a portable item, and a function for assisting in finding a portable item if the portable item is lost.

[0002]

2. Description of the Related Art Lost and found items in portable items can be prevented beforehand, and theft of luggage such as luggage can be dealt with, and can be carried by individuals on a daily basis. The apparatus is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-2152.
81 and JP-A-8-161653. In the forgotten theft alarm device, the terminal and the detector are a transmitter and a receiver, respectively, and an identifier (hereinafter, referred to as a terminal ID) for identifying each terminal is set on the terminal side. By collating and monitoring the strength of the received radio waves, it was possible to prevent the occurrence of left behind items of a plurality of portable items.

As a lost item searcher for helping to find a lost portable item, for example, Japanese Patent Application Laid-Open No. 10-17355
No. 0 publication. In the lost item search device, the terminal receives radio waves transmitted from the search device, and the terminal notifies its position by sound or light. Furthermore, there is a Toshiba location information service provided by Toshiba Corporation that uses a PHS to notify the position of a person on a map, which is not a portable item but indicates the position of a person on a map.

[0004]

In the forgotten theft alarm device as described above, when not in use, it is necessary to turn off the power of the detector so as not to malfunction. But,
Since terminals always transmit radio waves, it is necessary to turn off not only the power supply of the detector but also the power supply of the terminal in order to reduce wasteful power consumption. Since the power supply must be turned off, there is a problem that it takes much time and effort. In addition, when the loss of the detector is notified, the user is notified by sound.When applied to a large number of portable items such as keys, wallets, and fixed-time purses, what is the lost portable item? The means for notifying is not specifically described.

On the other hand, when the lost item is not close to the user, the sound or light emitted from the terminal does not reach the user. There was a problem that needed to be.

Further, when the above-mentioned position notifying system is applied to a portable device, a terminal attached to the portable device must always emit radio waves, so that there is a problem that power consumption increases.

SUMMARY OF THE INVENTION An object of the present invention is to provide a loss prevention detector and a terminal which can reduce the power consumption of the terminal without turning off the power of the terminal and make it possible to immediately identify the lost terminal. It is to be. Second, even if you lose your mobile device and you don't even know if it's nearby, you can use a system that identifies the location of the device and displays the location to determine the location of the device. It is to provide a terminal to make.

[0008]

In order to achieve the first object, the present invention provides a terminal with the following means.

(1) an identifier (hereinafter referred to as a terminal ID) for identifying a terminal unique to each terminal; (2) an inquiry radio wave receiving means for receiving an inquiry radio wave from the detector;
(3) ID collating means for collating the terminal ID included in the data transmitted from the detector with the terminal ID assigned to the self, and (4) response radio wave transmitting means for transmitting a response radio wave.

[0010] The detector is provided with the following means.

(5) ID registration means for registering and storing the terminal ID of the terminal to be monitored, (6) ID deletion means for deleting the terminal ID registered in (5), (7) (5) Extended data editing means for adding and editing the terminal ID, character string data, and terminal status registered in step (8), and sending out radio waves for inquiries to all terminals to the terminal registered in step (5) above. Inquiry radio wave sending means to
(9) response radio wave receiving means for receiving a response radio wave from the terminal, (10) notification means for notifying that there is no response from the terminal, and (11) for executing the above (5) and (6). Key input device, (12) Timer function.

In order to achieve the second object, (13) response request radio wave transmitting means for transmitting a radio wave to a terminal having a designated terminal ID in response to a request from a user, and (14) receiving a radio wave from the terminal Based on the position of the antenna and the strength of the received radio wave, to identify the position of the terminal, a system having position display means for displaying the position on a map,
The terminal of the present invention is provided with the following means.

(15) Response request radio wave receiving means for receiving a radio wave from the above-mentioned system, (16) When receiving a radio wave from the above-mentioned system, a radio wave for notifying the user's position is intermittently transmitted at least once. Position notification radio wave transmitting means.

In the present invention, first, before use, the detector registers the terminal ID of the terminal to be attached to the portable item in the detector by the ID registration means. The extension data editing means can register and change the name of the terminal and whether or not to monitor the terminal, and the registered terminal can be deleted by the ID deletion means. Then, the inquiry radio wave transmitting means transmits the radio wave of the inquiry to the registered terminal.

[0015] In the terminal, first, the inquiry radio wave receiving means receives the inquiry radio wave from the detector. Then, it is judged by the ID collation means whether it is an inquiry to itself, and if it is an inquiry to itself, a response to the detector is transmitted by the response radio wave transmission means.

Further, in the detector, the response from the terminal is received by the response radio wave receiving means, and the time from when the inquiry radio wave is transmitted is measured by the timer function. Then, the purpose is notified by the notification means.

If you lose your terminal and cannot find it,
Radio waves are transmitted to the terminal using the response request radio wave transmitting means. The terminal receives the response request radio wave by the response request radio wave receiving means, and transmits the radio wave indicating its own position by the position notification radio wave transmitting means. Then, the position of the terminal is specified by a radio wave indicating the received position from the terminal using the position display means, and the position is notified.

Thus, it is possible to detect whether the terminal registered in the detector is near the detector, and if the terminal is registered in the detector, it is possible to detect even more portable items. . In addition, when not used, in the existing one, in order to suppress power consumption, it was necessary to turn off the power of the terminal entirely, but in the present invention, until the radio wave from the detector is received, Since the mobile phone enters a radio wave waiting state and consumes less power, the power consumption can be suppressed without turning off the power of the terminal, thereby simplifying operations such as preparation. In addition, even when a portable item cannot be found, the position is displayed on the map, so that the position can be specified and it is easy to find the item. In addition, even if this function is provided, it does not transmit the radio wave indicating its position until the radio wave of the response request is received, so it consumes less power than the existing system that normally emits radio waves. Therefore, there is an effect that it can be used for a long time.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention has two functions. 1
One is a function to prevent the loss of mobile devices (hereinafter referred to as a loss prevention function), and the other is a function to help find lost mobile devices if they are lost ( Hereinafter, it is referred to as a lost-item discovery support function). Of the two functions of the present invention, one of the functions may be provided, or both functions may be provided. Hereinafter, the present invention will be described with reference to illustrated embodiments. FIG. 1 is a diagram showing an outline of a system for realizing the loss prevention function of the present invention.
FIG. 1 is a diagram showing an outline of a system for realizing a lost-item discovery support function of the present invention. First, the outline of the loss prevention function of the present invention will be described with reference to FIG.

Reference numeral 100 in FIG. 1 is a detector. The detector 100 manages the terminals 150a (150), 150b, and 150c. The terminal 150a (150), the terminal 150b, and the terminal 150c have, for example, the shapes shown in FIGS. 3 and 4, and are used by attaching them to an object that the user does not want to lose. The detector 100 is used, for example, worn or carried. Detector has a unique terminal ID
A key input device 110 is attached for registering / deleting a key. Using the key input device 110, the terminal ID of the terminal to be monitored in the detector is registered in advance. Now, this detector transmits information using the ID of each registered terminal as an identifier to each registered terminal one by one. The terminal that has received the transmitted data 400 has its own terminal ID.
And the ID 402 in the data 400 match, and if they match, response data 450 is returned. Thus, the presence of the terminal can be confirmed based on whether there is a response.

Next, a description will be given of a hardware configuration of the present system.

First, the hardware configuration of the detector 100 and the terminal 150 will be described with reference to FIG. FIG. 5 is a block diagram showing a configuration example of hardware.

First, the hardware configuration of the detector 100 will be described. In the figure, reference numeral 101 denotes a CPU, which controls peripheral parts, processes data, and executes various programs related to communication. 102 is a ROM (Read Only)
Memory), and stores each program and data used in the present embodiment. 103 is a RAM (Rando)
m Access Memory), which loads and executes each program used in the present embodiment from the ROM, and stores data, for example, list data 300. A wireless unit 104 is, for example, a wireless transmitting / receiving device. From this wireless unit, a very weak radio wave is transmitted, for example, the range of the radio wave to be transmitted is about 10 m. Reference numeral 107 denotes a display screen control, which integrates a display and a display control device. A display is, for example, an LCD
(Liquid Crystal Display) display. Reference numeral 106 denotes a sound output unit, for example, a speaker or an earphone. A key input control 110 is, for example, a button or a touch panel. As a terminal ID input device, for example, a device such as a barcode reader or a magnetic reader may be attached as shown at 115 in FIG.

Next, the terminal 150 for realizing the loss prevention function
The hardware configuration of a (150) will be described.
In the figure, reference numeral 151 denotes a CPU which executes various programs related to data processing and communication. Reference numeral 152 denotes a ROM, which stores various data such as programs and terminal IDs used in the present embodiment. Reference numeral 153 denotes a RAM which is used to load each program used in this embodiment from the ROM and execute it. A wireless unit 154 is, for example, a wireless transmitting / receiving device.

Next, the processing that occurs when the user operates the key input device 110 of the detector 100 will be described with reference to FIGS. 7, 8, and 9. FIG.

First, the details of the terminal ID list data of the registered terminal stored in the detector and the processing 500 that occurs when the user registers the terminal 1 (150) in the detector 100 will be described with reference to FIG. This will be described with reference to FIG.

First, regarding the terminal ID list data,
This will be described with reference to FIG. The list data 300 stored in the detector and used for transmitting inquiry radio waves to the terminal and for notifying the terminal when the terminal is lost has an ID 301 and a name 30.
2. It is composed of state 303. The ID 301 is a unique terminal ID possessed by each terminal, and the name 302 is character information for making it easy for the user to identify the terminal. For example, if your device is in your wallet,
Is stored. The state 303 indicates the state of the terminal. For example, it indicates a state such as a registered but monitored state (hereinafter referred to as a receivable state) or a registered but not monitored state. The name 302 and the state 3 in the registration list 300 stored in this detector
03 can be input or changed after the step 504 of the registration processing 500 or in the editing processing 550.

When the user presses the registration button 111 of the key input device 110, a registration process 500 is started. In the registration process 500, first, the user inputs the terminal ID of the terminal to be registered using the ten-key button 113 (step 501). Next, it is checked whether the terminal ID has been properly input, that is, whether the format of the terminal ID matches. If the terminal ID cannot be input properly, the process returns to step 501 (step 502). Next, it is checked whether or not the input terminal ID matches the previously registered terminal ID. If they match, the process returns to step 501, and the terminal ID is input again (step 503). Step 50
The terminal ID input in step 1 is added to the list data 300 (step 504).

A bar code reader, a magnetic reader, or the like may be used instead of the ID input method as described above.
In that case, the hardware attaches the barcode reading unit 115 as shown in FIG.
It may be changed to 1. If this input method is used, it is possible to input with simpler operation than the input using the numeric keypad 113 without fail.

Next, processing 550 that occurs when the user registers and changes the name 302 and the state 303 of the list data 300 registered for the terminal 150a (150) registered in the detector 100 will be described with reference to FIG. This will be described with reference to FIG.

When the user presses the change button 114 of the key input device 110, a change process 550 is started. In the change processing 550, first, the name 30 of the list data 300
Numeric key button 1 to change between 2 and state 303
13 is selected (step 551). When the name change is selected in step 551, the name of the terminal is input using the numeric keypad 113 (step 552). Further, when the change of the state is selected in step 551, the state of the terminal is changed using the numeric keypad 113 (step 55).
3). When step 552 or step 553 is completed,
The change processing 550 also ends.

Next, processing that occurs when the user deletes the registered terminal 150a (150) from the detector 100 will be described with reference to FIG.

When the user presses the delete button 112 of the key input device 110, a delete process 600 is started. In the deletion process 600, first, the user inputs the terminal ID of the terminal to be deleted using the numeric keypad 113 (step 601). Next, the terminal ID input in step 601 is the terminal ID list data 30 of the registered terminal.
0, and if not, a message to that effect is displayed on the display screen 105, and the process returns to step 601 (step 602). In step 512, the list data 300
If a terminal existing in the list data 300 can be selected, a record matching the terminal ID input in step 601 is stored in the list data 300.
(Step 603).

The user can select a terminal to be deleted by displaying a list of terminals registered on the screen without directly inputting a terminal ID, and selecting a terminal to be deleted from the displayed list by using a ten-key button. There is also a method of selecting and deleting at 115 or the like. For example, when the terminal name is stored in the terminal ID list, not only the terminal ID but also the terminal name is displayed as shown in FIG.
The terminal ID to be deleted can be selected by moving it with the number 15. According to this method, it is not necessary to directly input the terminal ID, so that the terminal to be deleted can be easily selected.

Next, a process 700 for detecting whether or not the registered terminal is near by the detector 100 will be described with reference to FIG. 13 which is a flow chart of the process 700 and FIGS. 14 and 15 showing the data structure of transmission / reception data. explain.

First, the data 400 sent from the detector
And the structure of data 450 sent from the terminal
4 and FIG. Data 400 transmitted from the detector includes a type 401 and an ID 402. The type 401 here is data indicating whether the signal is a radio wave transmitted from the detector or a radio wave transmitted from the terminal. The ID 402 is a terminal ID of a terminal making an inquiry. The data 450 sent from the terminal includes a type 451, an ID 452, and extension data 453. The type 451 is the data 400
Similarly to the type 401, ID 452 indicates whether the data was transmitted from the terminal or the detector, and the ID 452 indicates the terminal ID of the terminal that transmitted the data. Also, the extension data 45
3 is, for example, data on the remaining battery level of the terminal,
This is data for notifying the detector of data such as the state of the terminal. The extension data may or may not be present.

Next, a process 700 in which the detector makes an inquiry about the terminal will be described with reference to FIG. Detector 10
When 0 starts monitoring the terminal, first, the wireless unit 10
4 to transmit the transmission data 400 (step 70).
1). Also, the transmission data 400 at this time includes the type 4
01 is a flag indicating a radio wave transmitted from the detector,
402 is transmitted with the terminal ID of the terminal making the inquiry. When the data 400 is transmitted, the timer is started (or initialized) and the apparatus enters a state of waiting for reception of a response radio wave from the terminal (step 702). If the set time has elapsed or more, that is, if a timeout has occurred, it is determined that the inquiring terminal is not nearby, and that there is no nearby terminal on the display unit 105 of the detector 100,
As shown in FIG. 16, the display screen 105 is displayed together with the terminal ID and the character information of the terminal, and sounds a buzzer or the like to notify the user (step 705). Then, the same processing is performed for the terminal in the next receivable state (that is, the process returns to step 701). When the response radio wave is received, it is checked that the terminal ID 402 of the terminal that transmitted the inquiry radio wave matches the ID 452 in the received data (step 704). If they match, it is determined that the presence of the inquiring terminal has been confirmed, and the same processing is performed on the next terminal in a receivable state. On the other hand, if they do not match, it is determined that the response is not from the terminal that made the inquiry, and the process returns to step 702. This processing 70
0 is repeatedly executed by a timer, for example, every second.

Finally, a process 800 in which the terminal 150 receives the radio wave emitted from the detector 100 and transmits its response 800
Will be described with reference to FIG. 17 which is a flowchart of the process 800.

A process 800 in which the terminal receives a radio wave from the detector and transmits a response will be described. Terminal 150
When the power is turned on, the device enters a wait state for receiving data from the detector 100. Then, when the terminal 150 receives the inquiry radio wave from the detector 100, the process 800 starts. First, the ID 402 of the received data 400 and the terminal 1
It is checked whether or not the terminal IDs of the 50 itself match (step 801). If they do not match, it is determined that the inquiry radio wave has been sent to another terminal, and the process 800 ends. If they match, it is determined that an inquiry radio wave to terminal 150 has been sent, and response data 450 is sent to detector 100 (step 803). Response data 4 at this time
In 00, a flag indicating a radio wave transmitted from the terminal is set in the type 401, the terminal ID of the terminal itself is set in the ID 402, and data such as the battery state of the terminal is set in the extension data 403. You.

When the above function is used, when the terminal 150 registered in the detector 100 moves away, the fact that
Informs the user of a lost item or a stolen item, and has the effect of preventing the loss of portable items. In addition, by making the terminal 150 return a response only when an inquiry is made from the detector 100, the power consumption of the terminal can be reduced, and the terminal 150 can be used for a longer time than the existing one. There is. Further, by managing the terminal digitally, by displaying what is gone by the registered name, it is possible to obtain an effect that the user can more easily know what has been lost.

Next, an embodiment of the lost item finding support function of the present invention will be described with reference to FIGS. For this function, it is necessary to identify the position of the terminal by receiving radio waves from the terminal, and to display the position in accordance with the map. Such a function is provided, for example, by the PHOS called Toshiba Location Information Service provided by Toshiba Corporation.
There is a service that uses S to notify the current location.

First, the hardware configuration of the terminal 150 that implements the lost item discovery support function will be described with reference to FIG. Almost the same as the hardware configuration of the terminal that realizes the above-described loss prevention function (FIG. 5), the wireless unit 104 in FIG.
55 has been replaced. This is the response request data 90
0 is different from the radio wave used in the above loss prevention function,
For example, the response request data 900 is a separate unit for handling radio waves that are transmitted over a wide area, such as tens of kilometers, and radio waves for notifying the position are several hundred meters. However, the wireless unit and the position search transmitting / receiving unit may be one unit.

In the figure, reference numeral 150 denotes a terminal. 200 in the figure
Is a display terminal. An example is a personal computer. The terminal 150 which is operated from the display terminal 200 and has been lost
Can be displayed. First, the user uses the display terminal 200 to send response request data 900 to the host 210 that provides this service. The response request data 900 includes a type 901 and an ID 902 as shown in FIG.
Consists of The type 901 includes a code representing response request data, and the ID 901 includes a terminal ID of a terminal whose position is to be known. Upon receiving the response request data 900 from the display device, the host 210 immediately transmits the response request data 900 to the terminal 150 via the base station 240 and the antenna 250. Upon receiving the response request data 900 from the host 210, the terminal 150 emits a radio wave indicating its own position for the first time. This radio wave includes data 910, and the data 910 includes
As shown in FIG. 20, it is composed of an ID 911 in which the own terminal ID is entered. Then, this data 910 is transmitted to the host 210 through the antenna 230 and the base station 220 that have been received. The host 210 specifies the position of the terminal 150 based on the position of the antenna 230, the strength of the received radio wave, and the like, compares the position with the map, and displays the position on the display 200.

By using this function, the user can know the current location of the lost terminal, and the search can be easily performed. On the other hand, in the existing device, the terminal always emits radio waves to notify its position even when the position is not checked, whereas this function is the first function until the request to check the position is issued. Since no radio waves are emitted except for weak radio waves emitted from the battery, there is an effect of suppressing battery consumption.

The above two functions may be realized by having one each, or may be realized by having both functions.

[0046]

As described above, according to the present invention, the following effects can be obtained. In the loss prevention function, when the terminal 150 registered in the detector 100 leaves,
The detector 100 informs the user of this fact, and can quickly know the lost or stolen item. This prevents the portable item from being lost. The terminal 150 returns a response only when there is an inquiry from the detector 100. By doing so, the power consumption of the terminal can be suppressed, the effect that it can be used for a longer time than the existing one, and what has been lost by digitally managing the terminal has been registered Displaying by name has the effect that the user can more easily know what has been lost. In addition, the lost item discovery support function allows the user to know the current location of the lost terminal, making it easier to search.In the case of the existing one, the terminal always emits radio waves even when the location is not searched. While this function informs the user of his / her own position, this function does not emit radio waves other than the weak radio waves emitted for the first function until a request to check the location is issued, thus reducing battery consumption. The effect is.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an outline of an embodiment in which a function of preventing loss of a portable product of the present invention is realized.

FIG. 2 is an explanatory diagram showing an outline of an embodiment of the present invention that implements a function of supporting lost item discovery.

FIG. 3 is a diagram illustrating an example of an external appearance of a terminal according to an embodiment of the present invention.

FIG. 4 is a diagram illustrating an example of an appearance of a terminal according to the embodiment of the present invention.

FIG. 5 is a block diagram illustrating a hardware configuration of a detector and a terminal according to the embodiment of the present invention.

FIG. 6 is a block diagram illustrating a hardware configuration of a detector according to the embodiment of the present invention.

FIG. 7 is a flowchart illustrating a process of registering a terminal ID, which is input using a button, according to an embodiment of the present invention.

FIG. 8 is a flowchart illustrating a process for registering or changing a terminal name and a terminal state according to an embodiment of the present invention.

FIG. 9 is a flowchart illustrating a process of deleting a terminal ID according to an embodiment of the present invention.

FIG. 10 shows a terminal ID used in the embodiment of the present invention.
FIG. 5 is an explanatory diagram for explaining the configuration of list data.

FIG. 11 is a flowchart illustrating a process of inputting and registering a terminal ID using a baud code reader according to the embodiment of the present invention.

FIG. 12 is an explanatory diagram showing an example of a display screen when deleting a terminal ID using a ten-key button or the like in the embodiment of the present invention.

FIG. 13 is a flowchart illustrating a process of checking whether a terminal registered with a detector is nearby in the embodiment of the present invention.

FIG. 14 is an explanatory diagram showing a configuration of data transmitted from a detector used in the embodiment of the present invention.

FIG. 15 is an explanatory diagram illustrating a configuration of data transmitted from a terminal used in the embodiment of the present invention.

FIG. 16 is an explanatory diagram illustrating an example of a display screen used in the embodiment of the present invention when a terminal is lost.

FIG. 17 is a flowchart illustrating a process when the terminal receives a radio wave from the detector in the embodiment of the present invention.

FIG. 18 is a block diagram illustrating a hardware configuration of a terminal according to an embodiment of the present invention that implements a function of supporting lost item discovery.

FIG. 19 is an explanatory diagram showing a configuration of data included in a radio wave of a response request used in the embodiment of the present invention.

FIG. 20 is an explanatory diagram showing a configuration of data included in a radio wave for informing the position of a terminal used in the embodiment of the present invention.

[Explanation of symbols]

100: detector, 101: CPU, 102: ROM, 1
03: RAM, 104: wireless unit, 105: display screen, 106: sound output unit, 107: display screen control,
110 ... key input control, 111 ... registration button, 112 ...
Delete button, 113: numeric key button, 114: change button, 115: bar code reading unit, 150:
Terminal, 151 CPU, 152 ROM, 153 RA
M, 154: wireless unit, 155: position search radio wave transmitting / receiving unit, 200: display terminal, 210: host, 22
0: base station, 230: antenna, 240: base station, 25
0 ... antenna.

Continued on the front page F term (reference) 5K067 AA32 BB04 BB32 DD17 DD23 DD24 DD53 EE02 EE10 EE16 FF23 FF27 HH22 HH31 JJ53

Claims (10)

[Claims] 1. A detector for preventing loss, comprising means for registering and storing a unique identifier for identifying each terminal, and sending the unique identifier for identifying each terminal as an inquiry radio wave. Means for receiving the response radio wave from the terminal having the terminal identifier, collating the terminal identifier included in the response radio wave from the terminal with the identifier of the terminal transmitted as radio wave, and judging that there is a response if they match. And a means for notifying that the terminal is not near when there is no response within a predetermined time. 2. A terminal for preventing loss, having a unique identifier for identifying each terminal, and receiving an inquiry radio wave, when receiving the inquiry radio wave, the terminal identifier included in the inquiry radio wave and the terminal of the terminal itself. Means for checking the identifier and, if they match, transmitting an identifier of the own terminal as a response radio wave. 3. The detector according to claim 1, further comprising means for adding character information to the registered terminal identifier and storing the information, and means for displaying the character information when notifying that the terminal is not near. A detector characterized in that: 4. The detector according to claim 1, wherein a means for adding and storing information on the state of the terminal to the registered identifier of the terminal, and storing only the identifier of the terminal in a specific state, A detector comprising means for transmitting an inquiry radio wave. 5. The detector according to claim 1, wherein the means for registering an identifier for identifying a terminal is a key input device. 6. The detector according to claim 1, wherein the means for registering an identifier for identifying a terminal is a touch panel. 7. The detector according to claim 1, wherein said means for registering an identifier for identifying a terminal is a bar code reader. 8. The detector according to claim 1, wherein the means for registering an identifier for identifying a terminal is a magnetic reader. 9. A terminal in a system for specifying a position of a terminal and displaying the position, wherein when receiving a radio wave for a response request, the terminal intermittently transmits a radio wave indicating its position at least once. A terminal comprising: 10. The terminal according to claim 2, further comprising: a means for intermittently transmitting a radio wave indicating its position at least once when receiving a response request radio wave.