JP2018151190A - Cargo storage position detection system and server - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cargo storage position detection system with high convenience.SOLUTION: According to one embodiment, a cargo storage position detection system includes a plurality of transmitters, a plurality of receivers, a server, and a display terminal. The transmitters are attached to a plurality of respective cargoes, and transmit radio waves including cargo IDs of the respective cargoes to which the transmitters are attached. The receivers are installed away from each other in a storage place of the cargoes. The server periodically obtains reception intensity data on radio waves of the receivers via a network, measures and stores the position of each cargo using the obtained reception intensity data, and determines the state of each cargo on the basis of a measurement result of previous time and a measurement result of this time. The display terminal displays a determination result of the server.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a luggage storage position detection system and a server.

  Some systems for detecting the storage position of a package measure the storage position of the package using radio waves. In such a system, a device that emits radio waves is attached to a package, and the radio waves are received by a plurality of receivers that are arranged apart from each other in a storage location. The storage position of the package is measured based on the reception intensity of the radio wave of each receiver.

JP 2006-151493 A

In a place such as a warehouse where a large number of packages are frequently loaded and unloaded, there is a demand for the package manager to know not only the storage location of each package but also other information related to the package, for example, the state of loading and unloading. However, the system as described above is insufficient in convenience because it can provide only the latest position of the package to the package manager.
Embodiments of the present invention are made to solve the above-described problems, and an object of the present invention is to provide a convenient luggage storage position detection system and server.

  According to one embodiment, the luggage storage position detection system includes a plurality of transmitters, a plurality of receivers, a server, and a display terminal. The plurality of transmitters are attached to the plurality of packages, respectively, and transmit radio waves including the package ID of the attached packages. The plurality of receivers are installed apart from each other in a plurality of luggage storage locations. The server periodically acquires the received signal strength data of multiple receivers via the network, measures and stores the position of each package using the acquired received strength data, and the previous measurement results and the current The state of each package is determined based on the measurement result. The display terminal displays the determination result of the server.

  According to this embodiment, a highly convenient luggage storage position detection system and server can be provided.

It is a block diagram which shows the structure of the package storage position detection system which concerns on 1st Embodiment. It is a schematic diagram which shows the positioning method of a package. It is a flowchart of the storage state determination process of a package. It is a figure for demonstrating the movement determination process which concerns on 2nd Embodiment. The example of the selection screen of a display terminal is shown. The example of the display screen of a present position display format is shown. (A)-(c) shows the example of the display screen of a past history display format. (A)-(d) shows the example of a display of a display terminal when it determines with the package not moving in the storage place. (A)-(c) is a figure which shows the example of the list displayed on a display terminal.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. This embodiment does not limit the present invention.

(First embodiment)
FIG. 1 is a block diagram showing the configuration of the luggage storage position detection system according to the first embodiment. The luggage storage position detection system 1 illustrated in FIG. 1 includes a plurality of transmitters 10a and 10b, a plurality of receivers 20a, 20b, and 20c, an aggregation station 30, a server 50, and a display terminal 60.

  The transmitters 10a and 10b are attached to the luggage 100, respectively. The transmitters 10a and 10b periodically transmit radio waves including the package ID of the attached package 100. In other words, the package ID corresponds to identification data of the transmitters 10a and 10b.

  The receivers 20a, 20b, and 20c are installed apart from each other in the warehouse 200 that stores the luggage 100. These periodically receive the radio waves from the transmitters 10a and 10b, and send the received intensity data to the central station 30 together with their own identification data.

  The aggregation station 30 aggregates the reception intensity data and identification data of the receivers 20a, 20b, and 20c, and periodically transmits the aggregated data to the server 50 via the network 40. When the communication distance between the receivers 20a, 20b, and 20c and the server 50 is short, the above data is not aggregated by the aggregation station 30 and transmitted from the receivers 20a, 20b, and 20c to the server 50 via the network 40. May be sent. In this case, the central station 30 is not necessary, so that the system configuration can be simplified.

  The server 50 includes a data processing unit 51 and a database 52. The data processing unit 51 measures the position of each package 100 each time the reception intensity data is acquired, and stores the measurement result in the database 52. In addition, the data processing unit 51 determines the storage state of each package 100 using the data stored in the database 52. In addition to the past measurement results of the data processing unit 51, the database 52 associates data that associates the transmitters 10a and 10b with the package ID, position data of the receivers 20a, 20b, and 20c, and associates reception intensity with distance. Saved data.

  Here, the positioning process of the luggage 100 will be described with reference to FIG. FIG. 2 is a schematic diagram showing a positioning method for the luggage 100. Note that the positioning method of the luggage 100 is not limited to the method shown in FIG. 2, and other methods may be used.

  For example, when measuring the position of the luggage 100 to which the transmitter 10a is attached, the radio wave intensity of the transmitter 10a decreases as the distance from the transmitter 10a increases. Therefore, the reception intensity of the receivers 20a, 20b, and 20c can be converted into the distance to the luggage 100 to which the transmitter 10a is attached.

  In the present embodiment, when the data processing unit 51 acquires the received intensity data, the data processing unit 51 uses the data stored in the database 52 to calculate the distances R1, R2, and R3 from the receivers 20a, 20b, and 20c to the transmitter 10a. Identify. Subsequently, the data processing unit 51 uses the position data of the receivers 20a, 20b, and 20c stored in the database 52 and the distances R1, R2, and R3 to position the transmitter 10a, in other words, the transmitter 10a. The position of the baggage 100 to which is attached is obtained. Subsequently, the data processing unit 51 stores the measurement result in the database 52. Thereafter, the data processing unit 51 also measures the position of the luggage 100 to which the transmitter 10 b is attached by the same method, and stores the measurement result in the database 52.

  Hereinafter, the state determination process of the luggage 100 by the data processing unit 51 will be described with reference to FIG. FIG. 3 is a flowchart of the storage state determination process for the package 100.

  First, the data processing unit 51 determines whether or not the position of the luggage 100 has been measured (step S301). Here, in the database 52, it is assumed that the package 100 registered with the package ID “001” and the transmitter 10a are associated with each other. The data processing unit 51 determines that the position of the package 100 cannot be measured if the reception intensity data of the transmitter 10a cannot be acquired for a certain period. In this case, the data processing unit 51 determines whether or not the previous measurement result is stored in the database 52 (step S302).

  When the previous measurement result is stored in the database 52, it means that the package 100 has moved from the warehouse 200 to another storage location between the previous measurement and the current measurement. Therefore, the data processing unit 51 determines that the package 100 is “unloaded” (step S303).

  On the other hand, if the previous measurement result is not stored in the database 52, it means that the above-mentioned package 100 that cannot be positioned in the previous time and this time is not in the warehouse 200. Therefore, the data processing unit 51 determines that the package 100 is “none” in the warehouse 200 (step S304).

  In step 301, when the data processing unit 51 can measure the position of the package 100 to which the transmitter 10 a is attached, the data processing unit 51 subsequently determines whether or not the previous measurement result is stored in the database 52. (Step S305).

  When the previous measurement result is not stored in the database 52, it means that the package 100 has moved from another storage location to the warehouse 200 between the previous measurement and the current measurement. Therefore, the data processing unit 51 determines that the package 100 is “carry-in” (step S306).

  On the other hand, when the previous measurement result is stored in the database 52, it means that the package 100 that has been positioned in the previous time and this time is being stored in the warehouse 200. Therefore, the data processing unit 51 determines that the package 100 is “present” in the warehouse 200 (step S307).

  The determination result of the data processing unit 51 described above can be displayed on the display terminal 60. The display data is acquired by accessing the server 50 from the display terminal 60. Although two display terminals 60 are shown in FIG. 1, the number of display terminals 60 is not particularly limited.

  According to the present embodiment described above, the data processing unit 51 uses the current measurement result and the past measurement result when measuring the position of the luggage 100. Therefore, the package manager can manage not only the current position of the package 100 but also the loading and unloading of the package.

(Second Embodiment)
In the luggage storage position detection system according to the present embodiment, the data processing unit 51 determines whether or not the luggage 100 has moved in the warehouse 200. The configuration of the entire system is the same as that of the luggage storage position detection system shown in FIG.

  When the luggage 100 moves in the warehouse 200, the measurement position after the movement is different from the measurement position before the movement stored in the database 52. Therefore, the data processing unit 51 can determine the presence or absence of movement. According to this determination result, even if the luggage 100 moves in the warehouse 200, the labor for searching for the luggage 100 can be reduced.

  However, the reception strengths of the receivers 20a to 20c may vary depending on the radio wave reception environment. Therefore, even if the luggage 100 is not actually moving, the current measurement result may be different from the previous measurement result due to a measurement error. In this case, the data processing unit 51 may erroneously determine the movement of the luggage 100.

  Therefore, the data processing unit 51 according to the present embodiment performs a movement determination process that avoids the erroneous determination as described above. Hereinafter, this movement determination process will be described with reference to FIG.

  As shown in FIG. 4, for example, when the current measurement position is Q and the previous measurement position is position P1, these distances L1 are smaller than a preset threshold value Lth. In this case, the data processing unit 51 determines that the luggage 100 has not moved from the measurement position P1 to the measurement position Q in the warehouse 200. As a result, the measurement position P1 is stored in the database 52.

  On the other hand, when the previous measurement position is the position P2, these distances L2 are larger than the threshold value Lth. In this case, the data processing unit 51 determines that the luggage 100 has moved from the measurement position P2 to the measurement position Q in the warehouse 200. As a result, the measurement position Q is stored in the database 52.

  According to the present embodiment described above, when the distance between the previous measurement position and the current measurement position is larger than the preset threshold value Lth, the data processing unit 51 determines that the luggage 100 has moved. doing. Thereby, the influence of the measurement error can be eliminated. Therefore, the movement of the luggage 100 can be determined with high accuracy.

(Third embodiment)
In the package storage position detection system according to the present embodiment, the package manager can select the format of the position display of the package 100 on the display terminal 60. The configuration of the entire system is the same as that of the luggage storage position detection system shown in FIG.

  For example, when the display terminal 60 displays the current position of the package 100 together with the storage location, the package administrator can reduce labor for searching for the package 100. However, simply displaying the current position of the package 100 cannot satisfy the request for grasping the movement history of the package 100.

  Therefore, the display terminal 60 according to the present embodiment performs display processing in response to the above request. Hereinafter, this display process will be described.

  FIG. 5 shows an example of the selection screen of the display terminal 60. On the selection screen 61 shown in FIG. 5, the package administrator can select the package ID and the display format of the position of the package 100. In the present embodiment, the selection screen 61 accepts selection of a current position display format (first display format) or a past history display format (second display format).

  FIG. 6 shows an example of a display screen in the current position display format. The display screen 62 shown in FIG. 6 displays the current position Q of the package 100 corresponding to the package ID selected on the selection screen 61 together with the storage location. According to FIG. 6, the current position Q of the luggage 100 is the storage shelf 201 a located on the upper right on the display screen 62.

  Fig.7 (a)-FIG.7 (c) show the example of the display screen of a past history display format.

  A display screen 63 shown in FIG. 7A displays past measurement positions P1 to P3 of the package 100 in a format different from the current position Q. Therefore, the package administrator can grasp the past storage position of the package 100 and can recognize the current position Q of the package 100 at a glance. In the display screen 63, the current position Q is indicated by a filled circle, and the past measurement positions P1 to P3 are indicated by unfilled circles. However, the display format is not limited to this. For example, a different color display format may be used in which the current position Q is indicated in red and the past measurement positions P1 to P3 are indicated in blue.

  The display screen 64 shown in FIG. 7B connects the current position Q and the past measurement positions P1 to P3 with lines based on the history. According to the display screen 64, the package manager can accurately grasp the movement history in the storage location.

  The display screen 65 shown in FIG. 7C displays the measurement date and time of the past measurement positions P1 to P3 in an overlapping manner. The display screen 65 may display the past measurement periods P1 to P3 in an overlapping manner. According to the display screen 65, the package administrator can obtain more detailed information regarding the movement history of the package 100 than the display screen 64 shown in FIG. In the present embodiment, the measurement date and time and the measurement period are displayed in an overlapping manner, but only one of them may be displayed on the display screen 65.

(Fourth embodiment)
Here, various display processes of the display terminal 60 when the data processing unit 51 described in the second embodiment determines that the package 100 has not moved within the storage location will be described. The configuration of the entire system is the same as that of the luggage storage position detection system shown in FIG.

  FIGS. 8A to 8D show display examples of the display terminal 60 when it is determined that the luggage 100 has not moved within the storage location. In FIG. 8A to FIG. 8D, the actual position U of the luggage 100 is indicated by a star for convenience of explanation, but this position U is not displayed on the display terminal 60.

  In FIG. 8A, the display terminal 60 displays the current position Q of the package 100 measured by the data processing unit 51 in the plane coordinate system of the storage location. However, the reception strengths of the receivers 20a to 20c may vary. Therefore, it cannot be determined that the current position Q, which is the latest position of the luggage 100, is closest to the actual position U.

  Therefore, as shown in FIG. 8B, the display terminal 60 displays a plurality of measurement positions P measured in the past by the data processing unit 51 when it is determined that the luggage 100 has not moved within the storage location. A first display process for displaying in a plane coordinate system is performed. According to the first display process, the package administrator can predict which position the actual position U will be on the basis of the degree of dispersion of the plurality of measurement positions P.

  Moreover, as shown in FIG.8 (c), the display terminal 60 may perform a 2nd display process instead of a 1st display process. In the second display process, the display terminal 60 displays the distribution range W of the plurality of measurement positions P shown in FIG. 8B on the planar coordinate system. In the present embodiment, the display terminal 60 displays the distribution range W in a circle. The center position of this circle corresponds to the average position of the plurality of measurement positions P. The radius of the circle corresponds to the distance between the average position and the measurement position P farthest from the average position. According to the second display format shown in FIG. 8C, when the distribution range W is small, the degree of dispersion of the plurality of measurement positions P is also small. Therefore, the package administrator can predict the actual position U with higher accuracy.

  Furthermore, as illustrated in FIG. 8D, the display terminal 60 may perform a third display process instead of the first display process and the second display process. In the third display process, the display terminal 60 displays only the average position M of the plurality of measurement positions P shown in FIG. 8B on the planar coordinate system. When the degree of dispersion of the plurality of measurement positions P is small, the plurality of measurement positions P are locally displayed. In this case, it is difficult to see the display screen of the display terminal 60, and it is difficult to predict the actual position U. However, by displaying only the average position M as in the third display format shown in FIG. 8D, the display screen is easy to see and the actual position U can be easily predicted.

(Fifth embodiment)
In the luggage storage position detection system according to the present embodiment, the luggage administrator determines the storage state of a large number of luggage 100 based on the display screen of the display terminal 60 shown in FIGS. 9 (a) to 9 (c). I can grasp it. The configuration of the entire system is the same as that of the luggage storage position detection system shown in FIG.

  FIG. 9A to FIG. 9C are diagrams showing examples of lists displayed on the display terminal 60.

  On the display screen 71 shown in FIG. 9A, a list 711, a display button 712, and a sort button 713 are displayed. In the items of the list table 711, a check box of the package 100, a package ID, a carry-in date, a carry-out date, and whether or not the package 100 is moved in the storage location are registered. Each item is interrelated. Further, the display terminal 60 obtains the determination result of the carry-in date, the carry-out date, and the presence / absence of movement from the database 52.

  When the display button 712 is pressed by the operation of the parcel manager, the display screen 71 of the display terminal 60 is displayed on, for example, the display screen 63 to the display screen as shown in FIGS. 7A to 7C described above. Switch to 65. At this time, the displayed measurement position of the package 100 corresponds to the package ID selected in the list 711.

  According to the display screen 71, the package administrator can specify a desired package from among a large number of packages 100 and can grasp the storage state of the specified package. Each item in the list 711 is provided with a sort button 713 that can be rearranged. Therefore, the package administrator can adjust the list 711 to be easy to see for the user by using the sort button 713.

  In addition, a list table 721, a display button 722, and a sort button 723 are displayed on the display screen 72 shown in FIG. In the item of the list table 721, in addition to the item of the list table 711, a group indicating the attribute of the package 100 is registered. On the display screen 72, when a certain package 100 is selected by the operation of the package manager, packages belonging to the same group as the selected package are also selected. Thereafter, when the display button 722 is pressed, the display screen 71 of the display terminal 60 is switched to a display screen that displays the measurement positions of all the packages 100 selected in the list 721 together with the storage location.

  Therefore, for example, if the same type of baggage 100 or a plurality of types of baggage 100 used in combination are registered in the same group, the baggage manager can grasp the storage status of the plurality of highly related packages 100 without omission. can do. In addition, by using the sort button 723, it is possible to easily set the storage status of the packages belonging to the same group in the list 721.

  Further, on the display screen 73 shown in FIG. 9C, a list table 731, period designation fields 732 and 733, a list display button 734, a location display button 735, and a sort button 736 are displayed. . When the package administrator inputs the start period in the period designation field 732, inputs the end period in the period designation field 733, and presses the list display button 734, the package table 731 displays the package IDs carried in / out during the input period. Is displayed. According to the list 731, it is possible to check the storage status of the package 100 for a specific period set by the package manager.

  Thereafter, when the package administrator selects a package ID with the check box of the list 731 and presses the location display button 735, the display screen 73 displays the measurement position of the selected package 100 together with the storage location. Switch to At this time, if the number of packages to be displayed is large, the visibility is deteriorated. Therefore, when a plurality of package IDs are selected, only the current position may be displayed. On the other hand, when one package ID is selected, the display screen 63 may be switched to the display screen 65 shown in FIGS. In this case, the loading position of the luggage 100 and the unloading position of the luggage 100 may be displayed in different colors. According to such a display, the luggage manager can easily grasp the carry-in position and the carry-out position.

  Although several embodiments have been described above, these embodiments are presented as examples only and are not intended to limit the scope of the invention. The novel system described herein can be implemented in various other forms. Various omissions, substitutions, and changes can be made to the system configuration described in the present specification without departing from the gist of the invention. The appended claims and their equivalents are intended to include such forms and modifications as fall within the scope and spirit of the invention.

10a, 10b transmitter, 20a-20c receiver, 50 server, 51 data processing unit, 52 database 52 display terminal

Claims (7)

A plurality of transmitters each attached to a plurality of packages and transmitting radio waves including a package ID of the attached packages;
A plurality of receivers installed apart from each other in the plurality of luggage storage locations;
The radio wave reception intensity data of the plurality of receivers is periodically acquired via a network, and the position of each package is measured and stored using the acquired reception intensity data, and the previous measurement result and the current measurement result are stored. A server that determines the state of each package based on the measurement results;
A display terminal for displaying the determination result of the server;
Luggage storage position detection system.   When the distance between the previous measurement position and the current measurement position is smaller than a preset threshold value, the server determines that the package has not moved within the storage location, and the distance is the above-described distance. 2. The package storage position detection system according to claim 1, wherein if it is greater than a threshold value, it is determined that the package has moved within the storage location.   The display terminal displays a screen capable of selecting a first display format for displaying the current position of the package together with the storage location, or a second display format for displaying a history of the location of the package together with the storage location, When the second display format is selected, the past position is displayed in a different format with respect to the current position, or the current position and the past position are displayed in a form connected by a line based on the history. The luggage storage position detection system according to claim 1 or 2.   When the server determines that the package has not moved within the storage location, the display terminal performs a first display process using a plurality of measurement positions measured in the past for the package as a planar coordinate system, 3. The second display process in which a distribution range of a plurality of measurement positions is set to the planar coordinate system or the third display process in which an average position of the plurality of positions is set to the plane coordinate system is performed. Luggage storage position detection system.   The display terminal, when the second display format is selected, displays at least one of the measurement date and time of the past measurement position and the measurement period of the past measurement position so as to overlap the measurement position of the package. 3. The luggage storage position detection system according to 3.   The display terminal displays a list indicating a date of carry-in to the storage location, a date of carry-out from the storage location, and presence / absence of movement in the storage location in association with the package ID. Item 3. A luggage storage position detection system according to item 1 or 2. A radio wave including a package ID for identifying the plurality of packages, which is transmitted from a plurality of transmitters attached to the plurality of packages by a plurality of receivers installed at a plurality of storage locations of the packages. Is a server that periodically obtains the received intensity data when it is received via the network,
A database for storing measurement results of the position of each package based on the received intensity data;
Data processing for measuring the position each time the reception intensity data is acquired, storing the measured position in the database, and determining the state of each package based on the previous measurement result and the current measurement result stored in the database And
A server comprising

Images