JP2013054659A - Missing monitoring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a missing monitoring apparatus in which a radio tag to be monitored can be changed arbitrarily.SOLUTION: In a missing monitoring apparatus 10, an ID registration section 31 stores a tag ID for a weak radio transmission tag to be monitored. Missing monitoring means 22 monitors missing of a tag for the tag ID stored in the ID registration section 31 and issues a missing alarm in response to missing. Search means 23 monitors discovery of the missing tag and issues a discovery alarm in response to discovery. Registration addition means 24 adds a tag ID to be stored in the ID registration section 31, and registration deletion means 26 deletes a tag ID stored in the ID registration section 31.

Description

  The present invention relates to a loss monitoring device, and more particularly to a device for monitoring the loss of a weak wireless transmission tag.

As a system for monitoring the loss of an article, there is known a system in which a tag having a wireless transmission function is attached to an article to be monitored and the loss of the article is monitored using radio. The loss monitoring device includes a receiver and constantly monitors the wireless reception state, and issues an alarm that the article has been lost if the wireless communication cannot be received.
Such a loss monitoring system is described in Patent Document 1, for example.

JP 2008-70964 A

  However, the conventional loss monitoring system has a problem that the wireless tag to be monitored cannot be arbitrarily changed.

  The present invention has been made to solve such a problem, and an object thereof is to provide a loss monitoring apparatus capable of arbitrarily changing a wireless tag to be monitored.

The loss monitoring apparatus according to the present invention is a loss monitoring apparatus that monitors the loss of a weak wireless transmission tag that transmits a unique tag ID, and that receives a tag ID by weak wireless and a plurality of tag IDs. A storable ID registration unit, a registration addition unit for adding a tag ID stored in the ID registration unit, a registration deletion unit for deleting a tag ID stored in the ID registration unit, and a tag stored in the ID registration unit For each ID, a loss state storage unit for storing whether or not the weak wireless transmission tag that transmits the tag ID is lost, and for each weak wireless transmission tag that has not been lost, the weak wireless transmission tag is lost. And a loss monitoring means for issuing a loss alarm in response to the loss.
The loss monitoring apparatus may further include a search unit, and the search unit may monitor the detection of the weak wireless transmission tag for each of the weak weak wireless transmission tags and may issue a detection alert in response to the detection. .
When the receiver receives any tag ID of the weak wireless transmission tag that has been lost, the searching means may determine that the weak wireless transmission tag that transmits the tag ID has been found.
The loss monitoring device further includes, for each tag ID, a final reception time storage unit that stores the last reception time when the receiver last received the tag ID, and any of the tag IDs of the weak wireless transmission tags that are not lost. If the elapsed time from the last reception time is greater than a predetermined value, the loss monitoring means may determine that the weak wireless transmission tag that transmits the tag ID has been lost.
The registration adding unit may add the tag ID received by the receiver, and the registration deleting unit may delete the tag ID according to a predetermined operation.
The loss monitoring device can selectively operate in one of a plurality of operation modes including a loss monitoring mode, a search mode, a registration addition mode, and a registration deletion mode, and the registration addition unit functions in the registration addition mode, and the registration deletion The means may function in the registration deletion mode, the loss monitoring means may function in the loss monitoring mode, and the search means may function in the search mode.
The loss alarm may be realized by at least one of screen display, audio output, vibration, and wireless transmission.
You may further provide the operation log output means which transmits the operation log of a loss monitoring apparatus to another computer.

  According to the loss monitoring apparatus according to the present invention, since the transmitter ID stored in the ID registration unit can be added / deleted, the wireless tag to be monitored can be arbitrarily changed.

It is a figure which shows the structure of the loss monitoring system containing the loss monitoring apparatus which concerns on this invention. It is a front view of a loss monitoring apparatus. It is a top view of a loss monitoring apparatus. It is a left view of a loss monitoring apparatus. It is a figure which shows the operation mode of a loss monitoring apparatus, and the transition relationship between each operation mode. It is an example of the screen displayed in the main menu display mode. It is an example of the screen displayed in loss monitoring mode. It is an example of the screen displayed in search mode. It is an example of the screen displayed in a maintenance menu display mode. It is an example of the screen displayed in registration addition mode. It is an example of the screen displayed in registration ID display mode. It is an example of the screen displayed in registration ID all deletion mode.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Embodiment 1 FIG.
FIG. 1 is a diagram showing a configuration of a loss monitoring system including a loss monitoring device 10 according to the present invention. 2 to 4 are views showing the external appearance of the loss monitoring device 10. 2 is a front view, FIG. 3 is a bottom view, ie, a view seen from the direction III in FIG. 2, and FIG. 4 is a left side view, ie, a view seen from the direction IV in FIG.
This loss monitoring device 10 is a portable device and is configured with portable dimensions and weight. 2 to 4, the length D shown in FIG. 2 is 115 mm, the width W is 70 mm, and the height H shown in FIG. 3 is 19.5 mm.

As shown in FIG. 1, this loss monitoring system uses a plurality of keys including keys K1 and K2 as articles to be monitored, and monitors these losses. The loss monitoring system includes a loss monitoring device 10 and weak wireless transmission tags T1 and T2. The weak wireless transmission tags T1 and T2 are attached to the keys K1 and K2, respectively. The loss monitoring apparatus 10 monitors the loss of the weak wireless transmission tags T1 and T2, thereby monitoring the loss of the keys K1 and K2. To do.
In the present embodiment, the loss monitoring device 10 monitors, for example, the loss of 10 keys, but for simplicity, only two keys are shown in FIG.

The weak wireless transmission tags T1 and T2 include transmitters T1a and T2a, respectively. The transmitters T1a and T2a transmit unique tag IDs by weak radio. For example, the transmitter T1a transmits a signal representing “001” as the tag ID, and the transmitter T2a transmits a signal representing “002” as the tag ID.
The structure of such a weak wireless transmission tag is well known, and a commercially available weak wireless transmission tag can be used. The weak wireless transmission tag periodically transmits a tag ID at intervals of 0.5 seconds, for example. In the present specification, “weak radio” refers to weak radio defined in the Radio Law.

  The loss monitoring apparatus 10 includes a calculation unit 20, a storage unit 30, and a receiver 40. The receiver 40 can receive a signal transmitted by weak radio, and receives a tag ID in this embodiment. Further, the receiver 40 passes the received tag ID to the calculation means 20. Further, the receiver 40 can detect the radio wave intensity at which the tag ID is transmitted, and the computing means 20 can detect the weak wireless transmission tag from the receiver 40 (that is, from the loss monitoring device 10) within a predetermined distance range. Whether or not there is (for example, whether or not it is within 3 m) can be determined based on the radio wave intensity.

In the present specification, “receive tag ID” represents one of the following two situations, but these can be exchanged as appropriate.
-When received in a state where the tag ID can be identified regardless of the radio wave intensity.
-When tag ID is received with a radio field strength equal to or greater than the radio field strength corresponding to a distance of 3 m
For example, in the present embodiment, the latter criterion is used for loss monitoring and the former criterion is used for searching. However, as a modification, the former criterion may be used for loss monitoring, and the latter criterion may be used for searching. A criterion may be used.

The computing means 20 is a microprocessor that operates according to a program. The storage means 30 is constituted by a semiconductor memory, for example, and includes a RAM, a flash ROM, and an external EP-ROM.
The storage means 30 stores a control program (not shown) for controlling the operation of the loss monitoring apparatus 10, and the loss monitoring apparatus 10 realizes its function by the calculation means 20 executing this control program. . In the present embodiment, the calculation means 20 functions as a mode control means 21, a loss monitoring means 22, a search means 23, a registration addition means 24, a registration display means 25, a registration deletion means 26, and an operation log output means 27 (these operations). Will be described later).

The storage unit 30 includes an ID registration unit 31, a lost state storage unit 32, a last reception time storage unit 33, and an operation log storage unit 34. The ID registration unit 31 can store tag IDs of a plurality of weak wireless transmission tags designated as monitoring targets, and stores, for example, 10 tag IDs of 001, 002,. The ID registration unit 31 is disposed in the flash ROM, and holds information even when the loss monitoring apparatus 10 is powered off.
The lost state storage unit 32 stores, for each tag ID stored in the ID registration unit 31, a lost state indicating whether or not the weak wireless transmission tag associated with the tag ID is lost. The lost state can be represented by a 1-bit flag for each tag ID, for example.

The last reception time storage unit 33 stores the time (last reception time) when the receiver 40 last received the tag ID for each tag ID stored in the ID registration unit 31. The time can be obtained from a known clock (not shown), for example. By subtracting the last reception time from the current time obtained from the clock, the elapsed time from the last reception time can be calculated.
The operation log storage unit 34 stores an operation log of the loss monitoring device.

  1 to 4, the loss monitoring apparatus 10 includes a USB connector 50, an operation input unit 60, an LCD panel 70, a buzzer 80, LED lamps 90 and 91, and a charging DC connector as input / output interfaces. 92.

The USB connector 50 is an input / output connector for the loss monitoring apparatus 10 to communicate with another computer. The computing means 20 can communicate with other computers via the USB connector 50.
The operation input unit 60 is an input interface for a user of the loss monitoring apparatus 10 to input a command for operation. The operation input unit 60 is constituted by a plurality of operation keys, for example. In the present embodiment, the operation input unit 60 includes a selection button 61, an enter button 62, and a cancel button 63.
The LCD panel 70 is a display screen (liquid crystal panel) used by the loss monitoring apparatus 10 to visually output information to the user.
The buzzer 80 is an audio output device that is used by the loss monitoring device 10 to audibly output information to the user.
The selection button 61 also serves as a power button for controlling power supply from a battery (for example, a rechargeable lithium ion battery, not shown) to the entire loss monitoring apparatus 10. This is realized by, for example, pressing the selection button 61 for a long time. That is, the power supply is started or cut off by maintaining the state where the selection button 61 is pressed for a predetermined time.
The charging DC connector 92 is used to supply power from an external charging power source to the battery. LED lamps 91 and 92 are used to display the state of charge. For example, one of the LED lamps 91 and 92 is green and the other is red.

FIG. 5 is a diagram illustrating an operation mode of the loss monitoring apparatus 10 and a transition relationship between the operation modes. The loss monitoring device 10 can be selectively operated in any one of the operation modes shown in FIG. Immediately after the power is turned on, the loss monitoring device 10 operates in the loss monitoring mode M2.
The operation of the loss monitoring apparatus 10 in each operation mode will be described below with reference to FIGS.

  FIG. 6 is an example of a screen displayed on the LCD panel 70 in the main menu display mode M1. In the main menu display mode M1, the mode control unit 21 functions to switch the mode among the loss monitoring mode M2, the search mode M3, and the maintenance menu display mode M4. In the main menu display mode M1, the user can input a command by operating the operation input unit 60, and can shift to the loss monitoring mode M2, the search mode M3, or the maintenance menu display mode M4.

  In the screen of FIG. 6, a display “Main Menu” indicating that the loss monitoring device 10 is in the main menu display mode M1 and “Funshikanshi” indicating that the loss monitoring mode M2 is designated as a transition destination mode candidate are displayed. The display is made. When the selection button 61 is operated, the mode control unit 21 changes the transition destination mode candidate, and when the determination button 62 is operated, the mode monitoring unit 21 causes the loss monitoring apparatus 10 to transition to the transition destination mode candidate specified at that time.

For example, the user operates the selection button 61 several times from the screen of FIG. 6 to change the transition destination mode candidate to the maintenance menu display mode M4, and then operates the decision button 62 to change the loss monitoring device 10. Transition from the main menu display mode M1 to the maintenance menu display mode M4 can be made.
The mode control unit 21 records the switching time and the switching destination mode in the operation log storage unit 34 every time the mode of the loss monitoring apparatus 10 is switched.

  FIG. 7 is an example of a screen displayed on the LCD panel 70 in the loss monitoring mode M2. In the loss monitoring mode M2, the loss monitoring means 22 functions to monitor the loss of a weak wireless transmission tag that has not been lost. When transitioning from another mode to the loss monitoring mode M2, the loss monitoring means 22 clears the loss state stored in the loss state storage unit 32 for all tag IDs (that is, all keys are lost). No state).

  FIG. 7A shows a screen in the normal state in the loss monitoring mode M2, that is, a state in which the key is not lost, and displays that there is no lost key. FIG. 7B and FIG. 7C are screens in a state where the key is lost, and a display indicating that one of the keys is lost is displayed. In particular, in FIG. 7B, the number of lost keys (two in this example) is displayed, and in FIG. 7C, one of the lost keys (registered first in this example) is displayed. The tag ID associated with the key is displayed.

  In the loss monitoring mode M2, the loss monitoring means 22 receives the tag ID of the weak wireless transmission tag via the receiver 40 by weak wireless. When the tag ID is received with a radio wave intensity equal to or greater than the radio wave intensity corresponding to a distance of 3 m, the loss monitoring means 22 determines whether or not the received tag ID matches one of the tag IDs stored in the ID registration unit 31. If it is determined and they match, the last reception time storage unit 33 is updated. That is, the tag ID and the reception time are associated with each other and stored in the final reception time storage unit 33. In this way, the reception time stored in the final reception time storage unit 33 is always the final reception time for the tag ID.

  In the loss monitoring mode M2, the loss monitoring means 22 calculates the elapsed time from the last reception time as needed for each weak wireless transmission tag that has not been lost. If the elapsed time is longer than a predetermined value (for example, 15 seconds), it is determined that the weak wireless transmission tag has been lost and a loss warning is issued. As the loss alarm, a screen display with an alarm message “Kagiwofunshishititamasu” shown in FIGS. 7B and 7C and an alarm sound output from the buzzer 80 are made. Further, the loss monitoring unit 22 stores, in the lost state storage unit 32, the weak wireless transmission tag that is determined to be lost, that the weak wireless transmission tag is lost. Further, each time the loss monitoring means 22 determines that the weak wireless transmission tag is lost, the loss monitoring means 22 obtains information indicating that the weak wireless transmission tag is lost, the tag ID of the lost weak wireless transmission tag, and the time of loss. Recorded in the operation log storage unit 34.

  For example, in a state where the key is not lost, the receiver 40 cannot receive the tag ID “001” if the user forgets to leave the key K1 and leaves 3 m or more. If 15 seconds or more have passed, the loss monitoring means 22 determines that the weak wireless transmission tag T1 has been lost and issues a loss alarm.

  Also, the loss monitoring means 22 switches the screen display when the selection button 61 is operated when any key is lost in the loss monitoring mode M2. When the selection button 61 is operated in the state of FIG. 7B, the tag IDs of the weak wireless transmission tags that are lost are displayed as shown in FIG. 7C. Display sequentially according to the operation of 61). Further, when the selection button 61 is operated in the state of FIG. 7C (the state in which the last tag ID is displayed when a plurality of items are lost), the display returns to the display of FIG.

  In addition, when the cancel button 63 is operated in the loss monitoring mode M2, the loss monitoring unit 22 shifts the loss monitoring device 10 to the main menu display mode M1. At this time, if the loss alarm is issued, the loss alarm is stopped. That is, the alarm sound output from the buzzer 80 is stopped.

  The loss monitoring means 22 also stops the loss alarm when all weak wireless transmission tags are found in a state where the loss alarm is issued. For example, when the tag ID of the weak wireless transmission tag that has been lost is received again, the fact that the weak wireless transmission tag is not lost is stored in the lost state storage unit 32, and all the weak wireless transmission tags are lost. If it is not, the loss alarm is stopped. In this case, the alarm sound output from the buzzer 80 is stopped, the alarm text display is erased from the LCD panel 70, and the screen display is switched to that shown in FIG.

FIG. 8 is an example of a screen displayed on the LCD panel 70 in the search mode M3. In the search mode M3, the search means 23 functions to search for a weak weak wireless transmission tag and monitor the discovery.
FIG. 8A shows a screen in the normal state in the search mode M3, that is, a state in which a lost key is not found, and a display indicating that no found key is found. (In this example, it is indicated that "None of the keys have not been found" with a display of "Funshitkagitangakuchu")

  FIGS. 8B and 8C are screens in a state where a key has been found, and display indicating that any of the lost keys has been found. In particular, FIG. 8B shows the number of keys found, and FIG. 8C shows the tag ID associated with one of the found keys (the second registered key in this example). ing.

  In the search mode M3, the search means 23 receives the tag ID of the weak wireless transmission tag via the receiver 40 by weak wireless. When the tag ID is received, the search means 23 determines whether or not the received tag ID matches any of the tag IDs stored as lost in the lost state storage unit 32. It determines that a weak wireless transmission tag has been found and issues a discovery alert. As a discovery alarm, a screen display with an alarm message “Funsikagi Kentoshishimashita” shown in FIGS. 8B and 8C and an alarm sound output from the buzzer 80 are made. Note that the alarm sound output related to the discovery alarm may be the same as or different from the alarm sound output related to the loss alarm. The alarm sound output related to the discovery alarm stops, for example, after continuing for 1 second.

  Further, the search unit 23 stores, in the lost state storage unit 32, the weak wireless transmission tag determined to have been found that the weak wireless transmission tag is not lost. Further, each time the search means 23 determines that a weak wireless transmission tag has been found, it operates information indicating that the weak wireless transmission tag has been found, the tag ID of the discovered weak wireless transmission tag, and the time of discovery. Records in the log storage unit 34.

  For example, in a state where the key K1 with the tag ID “001” is lost, the receiver 40 receives the tag ID “001” when returning to the key K1 that the user has left behind and approaching within the receivable range. . In response to this, the search means 23 determines that the weak wireless transmission tag T1 has been found, and issues a discovery alarm.

  Further, when any key is found in the search mode M3, the search unit 23 switches the screen display when the selection button 61 is operated. When the selection button 61 is operated in the state of FIG. 8B, the tag ID of the weak wireless transmission tag discovered as shown in FIG. 8C is displayed (if a plurality of discovery buttons are found, the selection button 61 Display sequentially according to operation). Further, when the selection button 61 is operated in the state of FIG. 8C (the state in which the last tag ID is displayed when a plurality of items are found), the display returns to the display of FIG.

  Further, when the cancel button 63 is operated in the search mode M3, the search unit 23 causes the loss monitoring device 10 to transition to the main menu display mode M1. At this time, if the discovery alert is being issued, the discovery alert is stopped. That is, the alarm sound output from the buzzer 80 is stopped.

  FIG. 9 is an example of a screen displayed on the LCD panel 70 in the maintenance menu display mode M4. In the maintenance menu display mode M4, the mode control means 21 functions to switch the mode among the main menu display mode M1, the registration addition mode M5, the registration ID display mode M6, and the registration ID all deletion mode M7. In the maintenance menu display mode M4, the user inputs an instruction by operating the operation input unit 60, and transits to the main menu display mode M1, the registration addition mode M5, the registration ID display mode M6, or the registration ID all deletion mode M7. Can do.

  In the screen of FIG. 9, a display “maintenance menu” indicating that the loss monitoring apparatus 10 is in the maintenance menu display mode M4 and a register “additional mode M5” designated as a transition destination mode candidate are displayed. "Is displayed. When the selection button 61 is operated, the mode control unit 21 changes the transition destination mode candidate, and when the determination button 62 is operated, the mode monitoring unit 21 causes the loss monitoring apparatus 10 to transition to the transition destination mode candidate specified at that time.

For example, the user operates the selection button 61 several times from the screen in FIG. 9 to change the transition destination mode candidate to the registration ID all deletion mode M7, and then operates the decision button 62 to operate the loss monitoring device 10. Can be shifted to the registered ID all deletion mode M7.
Further, when the cancel button 63 is operated in the maintenance menu display mode M4, the mode control means 21 causes the loss monitoring device 10 to transition to the main menu display mode M1.

FIG. 10 is an example of a screen displayed on the LCD panel 70 in the registration addition mode M5. In the registration addition mode M5, the registration addition unit 24 functions to add a tag ID stored in the ID registration unit 31.
FIG. 10A is an initial display screen in the registration addition mode M5, and is a screen in a state where addition of a tag ID to be stored in the ID registration unit 31 is accepted. In this state, when the receiver 40 receives any tag ID, when both of the following two registration conditions are satisfied for the tag ID, the registration changing unit 24 accepts the tag ID as a registration candidate.
Registration condition 1: The tag ID is unregistered (that is, it is not stored in the ID registration unit 31 and is not included in the registration candidate).
-Registration condition 2: The intensity of the radio wave transmitted by the tag ID is equal to or greater than the intensity corresponding to a distance of 3 m.
The registration adding means 24 displays the number of tag IDs included in the registration candidates as “Torokukagisu”. That is, the total number of unregistered weak wireless transmission tags placed within 3 m is displayed on this screen. In the example of FIG. 10A, ten tag IDs are accepted as registration candidates.

  When the determination button 62 is operated in the state of FIG. 10A, the registration adding means 24 switches the screen display to that shown in FIG. When the cancel button 63 is operated, the registration adding unit 24 causes the loss monitoring device 10 to transition to the maintenance menu display mode M4.

  FIG. 10B is a screen in a state where confirmation of whether or not to store the tag ID received as a registration candidate in the ID registration unit 31 is requested. The total number of registration candidates is displayed. In this state, when the enter button 62 is operated, the registration adding unit 24 additionally stores all tag IDs of registration candidates in the ID registration unit 31. Further, the registration adding unit 24 records information indicating that a new tag ID is additionally stored, the added tag ID, and the added time in the operation log storage unit 34. Thereafter, the registration adding unit 24 causes the loss monitoring apparatus 10 to transition to the maintenance menu display mode M4.

  When the cancel button 63 is operated in the state of FIG. 10B, the registration adding unit 24 switches the screen display to that shown in FIG. 10A and accepts the addition of the tag ID to be stored. Return to.

  FIG. 11 is an example of a screen displayed on the LCD panel 70 in the registration ID display mode M6. In the registration ID display mode M6, the registration display means 25 functions to display the tag ID stored in the ID registration unit 31.

FIG. 11A is a screen displayed when at least one tag ID is stored in the ID registration unit 31. When a plurality of tag IDs are stored, the tag IDs are sequentially displayed according to the operation of the selection button 61.
FIG. 11B is a screen displayed when no tag ID is stored in the ID registration unit 31.
When the cancel button 63 is operated in the registration ID display mode M6, the registration display means 25 causes the loss monitoring device 10 to transition to the maintenance menu display mode M4.

FIG. 12 is an example of a screen displayed on the LCD panel 70 in the registered ID all deletion mode M7. In the registration ID all deletion mode M7, the registration deletion means 26 functions to delete the tag ID stored in the ID registration unit 31.
In the registered ID all deletion mode M7 (that is, the state where the screen of FIG. 12 is displayed), when the determination button 62 is operated, the registration deleting means 26 deletes all the tag IDs stored in the ID registration unit 31. Further, the registration deletion unit 26 records information indicating that all tag IDs have been deleted and the time of deletion in the operation log storage unit 34. Thereafter, the registration deletion unit 26 causes the loss monitoring apparatus 10 to transition to the maintenance menu display mode M4.

  In addition, when the cancel button 63 is operated in the registration ID all deletion mode M7, the registration deletion unit 26 shifts the loss monitoring apparatus 10 to the maintenance menu display mode M4 without deleting the tag ID.

  The loss monitoring device 10 can communicate with another computer (not shown) via the USB connector 50. For example, the operation log output means 27 can output the operation log stored in the operation log storage unit 34 via the USB connector 50 and transmit it to another computer. The operation at this time may be appropriately designed by those skilled in the art as being performed using the operation input unit 60. The operation log can be output in, for example, the maintenance menu display mode M4. However, an operation log output mode may be provided, and the operation log output mode can be changed from the maintenance menu display mode M4. It may be.

Using the loss monitoring apparatus 10 that operates as described above, it is possible to monitor the loss of an article (for example, a key) to be monitored as follows.
The user prepares a key and a weak wireless transmission tag in advance, and connects them together as in the example of FIG. There may be one key or a plurality of keys. In the case of a plurality of keys, the keys and the weak wireless transmission tags are associated with each other in one-to-one correspondence. Further, the loss monitoring apparatus 10 is switched to the registration ID all deletion mode M7 (FIG. 12), and all the registered contents are deleted.

Next, the user switches the loss monitoring apparatus 10 to the registration / addition mode M5 (FIG. 10) and places the key within 3 m around the loss monitoring apparatus 10 to register the tag ID. Thereafter, the user switches the loss monitoring device 10 to the loss monitoring mode M2 (FIG. 7). Here, the monitoring of the loss of the key is started.
In this state, the user carries the loss monitoring device 10 and the key. If there is no key loss, there is no alarm and the key is returned to its original location after use. If it is 3m or more away from any key, a loss warning is issued and the user can notice the loss of the key.

  When the location of the key becomes unknown due to reasons such as losing the key without setting the loss monitoring device 10 to the loss monitoring mode M2, the user switches the loss monitoring device 10 to the search mode M3 (FIG. 8). Start searching for the place where you lost your key. If the tag ID of the lost key is within the receivable range, the loss monitoring device 10 issues a discovery alarm, and the user can know that the key is nearby, thus facilitating the search.

  Furthermore, if the key to be monitored is changed because the keys to be carried vary depending on the day, etc., the lost monitoring device 10 is switched to the registered ID all deletion mode M7 (FIG. 12) to delete all registered contents, and then again. It is only necessary to switch to the registration addition mode M5 (FIG. 10) and re-register necessary keys.

  As described above, the loss monitoring apparatus 10 according to the present invention not only monitors the loss of the weak wireless transmission tag but also includes the registration adding unit 24 and the registration deleting unit 26 that change the contents of the ID registration unit 31. The weak wireless transmission tag to be monitored can be arbitrarily changed, and the search means 23 for monitoring the discovery of the weak wireless transmission tag is provided, so that it can be searched when the weak wireless transmission tag is lost. .

In the first embodiment, the loss alarm and the discovery alarm are performed by screen display and audio output, but may be further performed by vibration and wireless transmission. For example, the loss monitoring device may vibrate the entire loss monitoring device with a known vibration generating device and issue an alarm to a user carrying the loss monitoring device, and the loss monitoring device may receive a predetermined receiving device with a known transmitter. An alarm may be issued, and the receiving device may receive this and notify the user.
The loss alarm and the discovery alarm may be made by at least one of screen display, sound output, vibration, and wireless transmission.

  Further, although the article to be monitored is a key in the first embodiment, it may not be a key as long as it is an article to which a weak wireless transmission tag can be attached.

In the first embodiment, the registration adding unit 24 adds only the tag ID received by the receiver 40 to the ID registration unit 31, but the tag ID to be added may be specified by another method. For example, tag ID (s) may be received from another computer via the USB connector 50 and added to the ID registration unit 31.
In this way, a list of tag IDs corresponding to the item to be taken out is created by another computer, transferred to the loss monitoring device 10 and registered, and immediately after that, the loss monitoring mode M2 is set to take out. It is possible to check on the spot whether all the scheduled articles are available, and work mistakes can be prevented.

  In the first embodiment, in the registration ID all deletion mode M7, the registration deletion unit 26 deletes all the tag IDs stored in the lost state storage unit 32 at a time. It may be possible. For example, a tag ID candidate to be deleted may be selected according to the operation of the selection button 61, and the selected tag ID may be deleted from the ID registration unit 31 according to the operation of the determination button 62.

  DESCRIPTION OF SYMBOLS 10 Loss monitoring apparatus, 20 Calculation means (21 Mode control means, 22 Loss monitoring means, 23 Search means, 24 Registration addition means, 25 Registration display means, 26 Registration deletion means, 27 Operation log output means), 30 Storage means (31 ID registration unit, 32 lost state storage unit, 33 last received time storage unit, 34 operation log storage unit), 40 receiver, 50 USB connector, 60 operation input unit (61 selection button, 62 enter button, 63 cancel button), 70 LCD panel, 80 buzzer, 90 and 91 LED lamp, 92 DC connector for charging, K1, K2 key, T1, T2 Weak wireless transmission tag, T1a, T2a transmitter.

Claims (8)

A loss monitoring device that monitors the loss of a weak wireless transmission tag that transmits a unique tag ID,
A receiver for receiving the tag ID by weak wireless;
An ID registration unit capable of storing a plurality of the tag IDs;
Registration addition means for adding a tag ID stored in the ID registration unit;
Registration deletion means for deleting the tag ID stored in the ID registration unit;
For each tag ID stored in the ID registration unit, a lost state storage unit that stores whether or not the weak wireless transmission tag that transmits the tag ID is lost,
For each weak wireless transmission tag that has not been lost, the loss monitoring means that monitors the loss of the weak wireless transmission tag and issues a loss alarm in response to the loss;
A loss monitoring device comprising: The loss monitoring device further includes a search means,
The loss monitoring apparatus according to claim 1, wherein the search unit monitors the discovery of the weak wireless transmission tag for each of the lost weak wireless transmission tags and issues a discovery alarm in response to the discovery.   3. When the receiver receives the tag ID of one of the lost weak wireless transmission tags, the search unit determines that a weak wireless transmission tag that transmits the tag ID has been found. The loss monitoring device described in 1. The loss monitoring device further includes a final reception time storage unit that stores the last reception time when the receiver last received the tag ID for each of the tag IDs,
For any one of the tag IDs of the weak wireless transmission tags not lost, the loss monitoring means transmits the tag ID when the elapsed time from the last reception time is greater than a predetermined value. The loss monitoring apparatus according to claim 1, wherein the transmission tag is determined to be lost. The registration adding means adds a tag ID received by the receiver,
The loss monitoring apparatus according to claim 1, wherein the registration deletion unit deletes the tag ID according to a predetermined operation. The loss monitoring device is selectively operable in any one of a plurality of operation modes including a loss monitoring mode, a search mode, a registration addition mode, and a registration deletion mode.
The registration addition means functions in the registration addition mode,
The registration deletion means functions in the registration deletion mode,
The loss monitoring means functions in the loss monitoring mode,
The loss monitoring apparatus according to any one of claims 2 to 5, wherein the search unit functions in the search mode. The loss monitoring apparatus according to any one of claims 1 to 6, wherein the loss alarm is realized by at least one of screen display, audio output, vibration, and wireless transmission.   The loss monitoring apparatus according to claim 1, further comprising an operation log output unit that transmits an operation log of the loss monitoring apparatus to another computer.

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