JP7020817B2 - On-board unit and luggage management system - Google Patents

Description

The present invention relates to an on-board unit and a luggage management system that can be used to monitor an external environment affecting each luggage transported on a predetermined vehicle.

For example, when transporting cargo that is easily affected by the external environment, such as fresh food, fine arts, and precision equipment, using a vehicle such as a truck, it is subject to temperature changes during transportation and impacts from the outside. As a result, it is necessary to manage the quality of the luggage so that it does not deteriorate, break down or be destroyed.

For example, in the physical distribution management system of Patent Document 1, a technique for efficiently managing a physical distribution state while keeping the temperature and humidity of luggage at an optimum state and making it possible to investigate the cause of environmental change is shown. Specifically, a temperature / humidity sensor and a tag member having a storage function are attached to the luggage, and the temperature / humidity sensor information is written and stored in the storage function for each station in the work place. In addition, the information stored in the tag member is received to manage the cargo such as the shipping order of the cargo and the environment of the work place, and efficiently manage the distribution state while keeping the temperature and humidity of the cargo optimal. In addition, the tag members are collected and the history of temperature and humidity of the cargo is analyzed, and even if the quality of the cargo changes, the cause of the environmental change is investigated.

Further, the inspection device for a truck load of Patent Document 2 shows a technique for controlling a state quantity such as temperature, humidity, and acceleration during transportation of a truck load. Specifically, it has an antenna for receiving the luggage information of the wireless IC tag arranged around the cargo bed of the truck and attached to each luggage, and an in-vehicle control device for processing the luggage information from the antenna. Further, the antennas are arranged in a plurality of rows in the front and rear, and the communication area of the antennas covers all or a part of the loading space of the truck bed.

Further, the luggage location management device of Patent Document 3 shows a technique for grasping the position of a luggage in a warehouse by using an identification body such as RFID. Specifically, positioning technology such as GPS, wireless LAN positioning, and infrared positioning is used to position the position of a forklift, and the luggage mounted on the forklift is identified by a technology that reads a nearby ID such as an RFID tag. However, the position of the luggage is regarded as the same as the position of the mounted forklift and calculated.

Further, the temperature control system of Patent Document 4 shows a technique for appropriately selecting measurement information of a storage box existing in a loading space. Specifically, the terminal device receives measurement information from the temperature measuring module attached to the heat insulating box. The terminal device determines whether or not the delivery vehicle is moving based on the output information of the GPS receiver, the on / off information of the engine, and the like. Then, the terminal device identifies the box ID of the heat insulating box existing inside the delivery vehicle based on the time change of the reception intensity for each box ID of the measurement information after it is determined that the delivery vehicle has moved, and the box registration list. Is generated, and only the measurement information including the box ID registered in the box registration list is transmitted to the server device.

Japanese Unexamined Patent Publication No. 2001-325333 Japanese Unexamined Patent Publication No. 2005-320126 Japanese Unexamined Patent Publication No. 2011-219229 Japanese Unexamined Patent Publication No. 2017-57044

Vehicles such as trucks that carry luggage that is easily affected by the external environment are equipped with sensors for detecting temperature and acceleration. However, since such sensors are generally placed in only one place, when various loads are loaded and transported in a large space such as a truck bed, the place where each load is placed. It was difficult to grasp the accurate values of temperature and acceleration due to the influence of the difference.

On the other hand, for example, when the technique of Patent Document 1 is adopted, since the tag member attached to each baggage individually detects the temperature and humidity, accurate information can be grasped for each baggage. However, until the arrival at each station, the information detected by the sensor is only stored inside the tag member, so it is not possible to monitor the temperature of each baggage in real time while it is being transported by truck. .. The same applies to the technique of Patent Document 2. Further, in the technique of Patent Document 4, the temperature can be individually measured and monitored for each heat insulating box existing inside the delivery vehicle, but the temperature cannot be individually monitored for each package.

The present invention has been made in view of the above circumstances, and an object of the present invention is to accurately obtain external environmental information such as temperature and acceleration that affect various luggage carried by a vehicle such as a truck for each luggage. Moreover, it is to provide an in-vehicle device and a luggage management system that are useful for real-time monitoring.

In order to achieve the above-mentioned object, the on-board unit and the luggage management system according to the present invention are characterized by the following (1) to (3).
(1) A signal receiving unit that is attached to each of a plurality of packages transported by a vehicle and receives the signals from a plurality of tags that transmit signals representing the external environment including the temperature and acceleration that affect the packages. When,
A data processing unit that collects data of the external environment transmitted by the plurality of tags based on the received signal of the signal receiving unit, and a data processing unit.
A wireless transmission unit that transmits at least a part of the data collected by the data processing unit to a predetermined external device existing outside the vehicle by using wireless communication.
Equipped with
The tag is an active tag that emits radio waves by electric power from a battery built in the tag, and is attached to the outer surface of the luggage.
The data processing unit detects the maximum separation value most distant from the specified value at each of the above-mentioned external environment data transmitted by the plurality of tags at each predetermined time point, and the maximum separation. It has a maximum separation value detector that records or outputs only value data.
An in-vehicle device characterized by that.

(2) The data processing unit has an alarm output unit that compares the data of the external environment transmitted by the plurality of tags with a predetermined threshold value and outputs a predetermined alarm according to the comparison result.
The in-vehicle device according to (1) above, characterized in that.

( 3 ) A luggage management system composed of at least one in-vehicle device according to (1) or (2) above and the external device.

According to the in-vehicle device having the configuration of (1) above, by equipping the tag with a sensor that detects the condition of the external environment that affects the luggage such as temperature and acceleration, accurate external environment data is individually obtained for each luggage. Can collect and grasp the condition of luggage. Further, since the data collected by the on-board unit is transmitted to the external device, the status of the luggage can be constantly grasped even outside the vehicle by operating the external device.
Further, according to the in-vehicle device having the configuration of (1) above, it is possible to grasp the data of the external environment given to the cargo that is most strongly affected by the external environment among the plurality of cargoes carried by the vehicle. .. Therefore, it becomes easy for the driver or the like to grasp the occurrence of an abnormality in the external environment before the quality of the cargo is expected to deteriorate during transportation.

According to the in-vehicle device having the configuration of (2) above, if a situation occurs in which the quality of any of the cargoes is expected to deteriorate during transportation, an alarm can be given to the driver, shipper, manager, etc. can. Therefore, it is possible to take measures to suppress the deterioration of the quality of the luggage.

According to the cargo management system having the configuration of ( 3 ) above, the administrator who operates the external device can accurately grasp the status of each cargo in transit, so that, for example, the administrator can tell the driver of the corresponding vehicle. , It becomes possible to give instructions to prevent deterioration of the quality of the cargo during transportation. In addition, by using an external device, the manager can monitor the status of luggage of a plurality of vehicles at the same time.

According to the on-board unit and the luggage management system of the present invention, in order to accurately and in real time monitor external environmental information such as temperature and acceleration affecting various luggage carried by a vehicle such as a truck. Get useful information. Therefore, it is possible to suppress deterioration of the quality of the luggage during transportation.

The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through the embodiments described below (hereinafter referred to as "embodiments") with reference to the accompanying drawings. ..

FIG. 1 is a block diagram showing a configuration example of an on-board unit according to an embodiment of the present invention. FIG. 2 is a block diagram showing a configuration example of a luggage management system according to an embodiment of the present invention. FIG. 3 is a schematic diagram showing a configuration example of a database used by a luggage management system. FIG. 4 is a flowchart showing an outline of the operation of the vehicle-mounted device according to the embodiment of the present invention. FIG. 5 is a flowchart showing an operation example when the vehicle-mounted device receives data of a plurality of tags. FIG. 6 is a flowchart showing an operation example of the server. FIG. 7 is a flowchart showing the operation of the on-board unit in the modified example. FIG. 8 is a flowchart showing the operation of the server in the modified example.

Specific embodiments of the present invention will be described below with reference to the respective figures.
<Configuration example of in-vehicle device>
FIG. 1 shows a configuration example of the vehicle-mounted device 10 according to the embodiment of the present invention. The on-board unit 10 is used in a state of being mounted on the vehicle in order to manage various loads carried on the vehicle such as a truck. It is assumed that the on-board unit 10 is configured as a dedicated on-board unit for managing luggage, or as a part of a general on-board unit such as a digital tachograph.

As shown in FIG. 1, the in-vehicle device 10 includes a microcomputer (CPU) 11, a speed signal interface 12, an engine signal interface 13, a GPS interface 14, an analog signal interface 15, an external input interface 16, a tag signal interface 17, and a wide area radio. It includes a communication module 18, an interface 19, a non-volatile memory 20, a volatile memory 21, an SD card 22, a switch input unit 23, and a liquid crystal display unit (LCD) 24.

The microcomputer 11 realizes various functions required for the vehicle-mounted device 10 by executing a program incorporated in advance. The main operation of the microcomputer 11 will be described later.

The speed signal interface 12 converts a predetermined vehicle speed signal SG1 output from the vehicle side into a signal suitable for input processing of the microcomputer 11. The microcomputer 11 can grasp the traveling speed and the traveling distance of the vehicle by monitoring the number of pulses of the vehicle speed signal SG1 and the cycle of the signal.

The engine signal interface 13 converts a predetermined engine rotation signal SG2 output from the vehicle side into a signal suitable for input processing of the microcomputer 11. The microcomputer 11 can grasp the rotation speed (rpm) of the engine by monitoring the number of pulses of the engine rotation signal SG2 and the cycle of the signal.

The GPS interface 14 is used to input a signal SG3 from a GPS receiver (not shown) to the microcomputer 11. The GPS receiver can receive radio waves from a plurality of GPS (Global Positioning System) satellites and calculate the current position of the vehicle as the receiving point. The microcomputer 11 can acquire the information of the current position from the GPS receiver via the GPS interface 14.

The analog signal interface 15 can convert, for example, an analog signal SG4 representing a temperature at a specific portion of a luggage compartment of a vehicle into a digital signal and give it to the microcomputer 11. In this embodiment, as will be described later, it is possible to individually grasp external environmental information such as temperature for each baggage.

The external input interface 16 converts a predetermined external signal SG5 into a signal suitable for input processing of the microcomputer 11. For example, a signal indicating the magnitude of the acceleration applied to the vehicle can be input to the external input interface 16 as an external signal SG5.

The tag signal interface 17 is used to connect the receiver 30 to the input of the microcomputer 11. The receiver 30 has a function of receiving the radio signal of the radio tag 32 described later. The receiver 30 may be connected to the outside of the vehicle-mounted device 10 as shown in FIG. 1, or may be built in the vehicle-mounted device 10.

The wide area wireless communication module 18 has a function of securing a wireless communication line with a wireless base station 41 provided by, for example, a mobile communication operator, and enabling wide area wireless communication. The wide area wireless communication module 18 can communicate with the wireless base station 41 via the antenna 19.

The non-volatile memory 20 is an electronic device such as a flash memory capable of reading data and rewriting the held data by the access of the microcomputer 11. The non-volatile memory 20 is used to hold data such as various parameters, constant data, and programs used by the vehicle-mounted device 10.

The volatile memory 21 is a semiconductor memory device that can freely read and write data by the access of the microcomputer 11. The volatile memory 21 is used to temporarily hold various data handled by the microcomputer 11.

The SD card 22 is connected to the vehicle-mounted device 10 in a detachable state by using a predetermined card interface (not shown). The SD card 22 is used to store various data to be recorded by the vehicle-mounted device 10, such as vehicle operation data.

The switch input unit 23 includes a switch that generates a signal indicating an operation state of a plurality of buttons for receiving an input operation of a user such as a vehicle driver. The signal of the operation state of each button is input to the microcomputer 11 from the switch input unit 23.

The liquid crystal display unit 24 is arranged at a position that is easy for the driver to see from the front of the housing of the vehicle-mounted device 10, and is controlled by the microcomputer 11 to display the operating state of the vehicle-mounted device 10 or when a user inputs an operation. It is used to display the necessary information.

<Configuration example of luggage management system>
FIG. 2 shows a configuration example of the luggage management system according to the embodiment of the present invention.
In the example shown in FIG. 2, it is assumed that the vehicle 33 is a truck capable of loading various loads on the loading platform 33a. Further, in the example of FIG. 2, the loading platform 33a has six sections of loading areas 33a1, 33a2, 33a3, 33a4, 33a5, and 33a6.

In the example shown in FIG. 2, the loading areas 33a1, 33a2, 33a3, 33a4, 33a5, and 33a6 are filled with luggage 31-1, 31-2, 31-3, 31-4, 31-5, and 31-6, respectively. Is placed. Further, wireless tags 32-1 to 32-6 (TAG1 to TAG6) are individually attached to each of the luggages 31-1 to 31-6.

Here, each radio tag 32-1 to 32-6 is an active tag. That is, each tag has a built-in battery and periodically emits radio waves by its own electric power to transmit tag information. Further, although not shown in FIG. 2, each of the wireless tags 32-1 to 32-6 has a built-in temperature sensor and an acceleration sensor (may be externally attached). Therefore, the information of the external environment detected by these sensors can be transmitted from the tag. As a specific example, each radio tag 32-1 to 32-6 periodically transmits information including its own ID as a radio signal every minute.

Further, each of the wireless tags 32-1 to 32-6 transmits a wireless signal using, for example, a frequency band of 920 [MHz]. Of course, other frequency bands may be used. Further, as the wireless tags 32-1 to 32-6, passive tags without a built-in battery may be used, or wired tags may be used instead of the wireless tags.

In this embodiment, each of the luggages 31-1 to 31-6 is individually managed by the wireless tags 32-1 to 32-6, so that the luggages 31-1 to 31-6 can be placed in the necessary places as needed. Even if they are arranged, it is possible to acquire information on the external environment given to each of the luggages 31-1 to 31-6. Therefore, the luggage 31-1 to 31-6 may be arranged side by side in the horizontal direction as shown in FIG. 2, or may be loaded and arranged in the vertical direction.

As shown in FIG. 2, the vehicle-mounted device 10 is mounted on the vehicle 33. Further, the receiver 30 is connected to the vehicle-mounted device 10. The receiver 30 is equipped with a receiving function for receiving radio waves of the wireless tags 32-1 to 32-6 arranged on the loading platform 33a and acquiring information such as an ID from the received signal. In the present embodiment, since it is assumed that the active tag is used, the receiver 30 does not have a transmission function, but when the passive tag is used as the wireless tags 32-1 to 32-6, the receiver 30 transmits. It also has a function.

The server 43 included in the luggage management system shown in FIG. 2 is connected to the wireless base station 41 via the Internet network 42. The server 43 is installed in a predetermined data center or company, for example. Further, the user terminal 44 is connected to the server 43. The user terminal 44 is, for example, a personal computer (PC) managed by each company that is a user. It is also possible to handle baggage information of a plurality of companies with one common server 43.

Although only one vehicle 33 is shown in FIG. 2, in reality, a large number of vehicles 33 each equipped with the on-board unit 10 can be managed simultaneously by the common server 43. Each of the on-board units 10 mounted on each vehicle 33 corresponds to each other by receiving the radio signals of the radio tags 32-1 to 32-6 existing in the loading areas 33a1 to 33a6 of the loading platform 33a by the receiver 30. It is possible to acquire the ID number of the tag and the like.

Further, the on-board unit 10 of each vehicle 33 secures a wireless communication line with the wireless base station 41 by wide area wireless communication, and transmits the detected tag ID number and the like to the server 43. The information transmitted by the vehicle-mounted device 10 of each vehicle reaches the server 43 via the radio base station 41 and the Internet network 42.

Further, as will be described later, the on-board unit 10 of each vehicle acquires information on the current position of its own vehicle, and associates the detected tag ID number and the like with external environment information such as position information, temperature, and acceleration. It sends to the server 43. Therefore, the server 43 can individually grasp not only the presence / absence of detection of each wireless tag 32-1 to 32-6, but also its current position and external environment information. Further, the server 43 is a baggage 31-1 to 31-6, a wireless tag 32-1 to 32-6, a receiver 30, and an in-vehicle device 10 so that the baggage of a plurality of companies and users can be managed separately from each other. , Or at least one of these can be managed in a state of being distinguished for each company or each user.

The server 43 automatically detects an abnormality in external environmental information such as temperature and acceleration that affects the quality of the cargo being transported, or automatically detects the loss of the cargo, and the corresponding user terminal 44. You can display alerts on the screen or notify by email. Further, a user of each company or the like can access the server 43 by the user terminal 44 and grasp the status of the managed luggage.

<Example of database configuration used by server 43>
FIG. 3 shows a configuration example of the database used by the server 43 of the luggage management system. That is, the computer in the server 43 uses various information existing in the tag database DB1, the vehicle database DB2, the determination condition database DB3, etc. shown in FIG. 3 in order to manage the luggage.

The tag database DB1 is a database for individually managing information associated with each of a large number of tags for each tag. The tag database DB 1 shown in FIG. 3 includes a company name, a recognition number (ID number of the tag), temperature information, acceleration information, status information, and destination information as management items.

The status information in the tag database DB1 is information indicating the state of the package to which the tag is attached, and specifically, waiting, delayed delivery, misdelivery, delivery, delivery completion, etc. at the depot (warehouse or delivery base). There is a state of. In addition, the status information includes information indicating an abnormality in temperature, an abnormality in acceleration, whether or not the tag is a confirmed tag, and information indicating whether or not the luggage has been lost.

The destination information in the tag database DB 1 includes information on the destination (location such as a delivery base and a relay point) of the package to which the tag is attached and the time when the destination should be reached. The contents of the tag database DB1 are sequentially updated under the control of the server 43 according to the actual state change of each corresponding tag.

The vehicle database DB 2 is a database for managing each vehicle equipped with the vehicle-mounted device 10. The vehicle database DB2 shown in FIG. 3 includes a company name, a traveling speed, an engine rotation speed, and GPS data (current position of the vehicle) as management items.

The current position of each tag and the luggage to which it is attached can be acquired based on the GPS data in the vehicle database DB2, but the information of the current position for each tag may be managed in the tag database DB1. The contents of the vehicle database DB 2 are sequentially updated under the control of the server 43 as the state of the vehicle changes.

The determination condition database DB 3 is information used by the server 43 when determining the state of each tag and the baggage to which the tag is attached. Information such as time, place, distance, temperature threshold value, and acceleration threshold value is registered in advance in the determination condition database DB3 shown in FIG. 3 as determination conditions.

<Explanation of operation>
<Outline of operation of on-board unit 10>
FIG. 4 shows an outline of the operation of the vehicle-mounted device 10 according to the embodiment of the present invention. That is, the microcomputer 11 in the vehicle-mounted device 10 shown in FIG. 1 executes the operation shown in FIG. The operation of FIG. 4 will be described below.

The microcomputer 11 monitors the signal output by the receiver 30 connected to the input of the vehicle-mounted device 10, and identifies in S11 whether or not the receiver 30 has received the radio signal from any of the radio tags 32. Then, when the radio signal is received, the process proceeds to the next S12.

Further, as shown in FIG. 4, since each wireless tag 32 is provided with a temperature sensor 32a and an acceleration sensor 32b, the on-board unit 10 can also acquire information on the temperature and acceleration detected by each wireless tag 32 from the receiver 30. ..

In step S12, the microcomputer 11 acquires the information of the ID number of the wireless tag 32 included in the signal received by the receiver 30 from the receiver 30 via the tag signal interface 17. In addition to the ID number, external environmental information such as temperature and acceleration is also acquired for each wireless tag 32.

In step S13, the microcomputer 11 acquires the information of the current position (latitude / longitude of the receiving point or the position of the own vehicle) calculated by the GPS receiver (not shown) via the GPS interface 14.

In step S14, the microcomputer 11 associates the information of the ID number of the wireless tag 32 acquired in S12 with the information of the current position acquired in S13, and further includes the external environment information. Is transmitted to the server 43 via the wide area wireless communication module 18. For example, the vehicle-mounted device 10 may simultaneously transmit information indicating a state such as a traveling speed and a traveling distance of the own vehicle to the server 43 in S14.

Therefore, the server 43 periodically and repeatedly receives from the on-board unit 10 mounted on each vehicle in a state where the ID number of each wireless tag 32 detected by the receiver 30 connected to the device 10 and the current position are associated with each other. can do.

<Process to receive data of multiple tags>
FIG. 5 shows an operation example when the vehicle-mounted device 10 receives data of a plurality of tags. This operation is periodically and repeatedly performed by the microcomputer 11 in the vehicle-mounted device 10 after starting the data reception from the tag. In addition, "TAG" shown in FIG. 5 corresponds to each radio tag 32-1 to 32-6 shown in FIG. The operation of FIG. 5 will be described below.

The microcomputer 11 of the vehicle-mounted device 10 acquires the data transmitted by each of the wireless tags 32-1 to 32-6 (TAG1 to 6) via the receiver 30 (S21). Further, the microcomputer 11 of the vehicle-mounted device 10 transmits the data from the wireless tags 32-1 to 32-6 acquired in S21 to the server 43 (S22).

In step S23, the microcomputer 11 of the vehicle-mounted device 10 compares the temperature of the external environment for each tag included in the data acquired in S21 with a predetermined threshold value (a specified value for which a temperature upper limit is set). In addition, this threshold value may be set individually for each baggage 31, or a common value may be assigned to a plurality of baggage 31. If the temperature of any of the wireless tags 32-1 to 32-6 is equal to or higher than the threshold value, the quality of the luggage 31 may deteriorate, so the process proceeds from S23 to S25 for alarm output.

In step S24, the microcomputer 11 of the vehicle-mounted device 10 compares the acceleration of the external environment for each tag included in the data acquired in S21 with a predetermined threshold value (a defined value in which the upper limit of acceleration is set). In addition, this threshold value may be set individually for each baggage 31, or a common value may be assigned to a plurality of 31's. If the acceleration of any of the wireless tags 32-1 to 32-6 is equal to or greater than the threshold value, the quality of the luggage 31 may deteriorate, so the process proceeds from S24 to S25 for alarm output.

In step S25, the microcomputer 11 of the vehicle-mounted device 10 outputs an alarm according to the type of abnormality detected in S23 or S24 from the vehicle-mounted device 10 itself. Specifically, the display of the liquid crystal display unit 24 is used to display "temperature abnormality" and "acceleration abnormality". If the on-board unit 10 has a voice output function, the voice output of "Temperature abnormality, please check." Or "Acceleration abnormality, please check." Is performed at the same time.

<Server operation>
An operation example of the server 43 is shown in FIG. This process is periodically executed at any time by the computer in the server 43. The operation of FIG. 6 will be described below.

The server 43 receives and processes the data transmitted from the vehicle-mounted device 10 of each vehicle in S31. For example, the data transmitted from the vehicle-mounted device 10 shown in FIG. 2 includes the ID number, position information, temperature information, acceleration information, and the like of the tag (TAG) corresponding to each of the wireless tags 32-1 to 32-6. include. Therefore, the computer in the server 43 can grasp the temperature information and the acceleration information for each tag of each vehicle in S31.

In step S32, the computer in the server 43 compares each temperature information of the plurality of wireless tags 32-1 to 32-6 with a predetermined threshold value (a predetermined value for which a temperature upper limit is set). This threshold value may be assigned individually to each package, or a common value may be assigned to a plurality of packages. When at least one temperature information of the plurality of wireless tags 32-1 to 32-6 is equal to or higher than the threshold value, that is, when there is a possibility that the quality of the corresponding baggage may deteriorate due to a temperature abnormality, the alarm output is performed from S32. Proceed to S34.

In step S33, the computer in the server 43 compares each acceleration information of the plurality of radio tags 32-1 to 32-6 with a predetermined threshold value (a defined value for which an acceleration upper limit is set). This threshold value may be assigned individually to each package, or a common value may be assigned to a plurality of packages. When the acceleration information of at least one of the plurality of wireless tags 32-1 to 32-6 is equal to or more than the threshold value, that is, when there is a possibility that the quality of the corresponding baggage may deteriorate due to the influence of excessive acceleration, the alarm output is used. Proceed from S33 to S34.

In step S34, the computer in the server 43 outputs an alarm according to the type of abnormality detected in S32 or S33. For example, if the luggage administrator or the user is accessing the server 43 via the user terminal 44, the server 43 displays the display screen of the user terminal 44 as a Web service for the temperature of the corresponding luggage. Information indicating that an abnormality in the acceleration or acceleration has occurred is output by a pop-up display. If the e-mail address of the baggage manager or the mobile terminal owned by the user is registered in the server 43 in advance, the server 43 sends an alarm mail to the e-mail address of the corresponding baggage. do.

When the active tag is used as the wireless tag 32 attached to each cargo 31, delivery management can be performed in addition to managing external environmental information such as the temperature and acceleration of the cargo. That is, since the radio wave transmitted by the active tag reaches a place as far away as, for example, about 300 [m], the presence or absence of signals of the radio tags 32-1 to 32-6 is monitored by using the on-board unit 10 and the receiver 30. As a result, the on-board unit 10 and the server 43 can constantly grasp the current position of each baggage, the presence / absence of loss, the presence / absence of theft, and the like.

<Modification example of operation>
FIG. 7 shows the operation of the on-board unit 10 in the modified example. Further, FIG. 8 shows the operation of the server 43 in the modified example.

<Operation of on-board unit 10>
Steps S21B and S26 are added to the operation of the vehicle-mounted device 10 shown in FIG. 7. Other than that, the contents are the same as those in FIG.

In step S21B of FIG. 7, the microcomputer 11 of the vehicle-mounted device 10 executes the detection of the maximum value for the data of the plurality of wireless tags 32-1 to 32-6 received in S21. That is, the maximum value is detected as the maximum temperature value from the temperature information of the plurality of loading areas 33a1 to 33a6 included in the data of the wireless tags 32-1 to 32-6. Further, the maximum value is detected as the maximum value of the acceleration from the acceleration information of the plurality of loading areas 33a1 to 33a6 included in the data of the wireless tags 32-1 to 32-6.

In step S26, the microcomputer 11 of the vehicle-mounted device 10 displays the maximum value of the temperature detected in S21B and the maximum value of the acceleration on the screen of the liquid crystal display unit 24, respectively.

Therefore, even in a situation where the alarm is not output in S25, the driver of the vehicle visually recognizes the display content of the liquid crystal display unit 24 to obtain the maximum temperature value in the loading areas 33a1 to 33a6 of the loading platform 33a of the own vehicle. And the maximum value of acceleration can be grasped at all times. In this case, since only the maximum value is displayed, it is not necessary to monitor various numerical values at the same time, and the monitoring work becomes easy. Moreover, even before the alarm is output, the tendency of temperature and acceleration can be easily grasped.

<Operation of server 43>
Steps S31B and S35 are added to the operation of the server 43 shown in FIG. Other than that, the contents are the same as those in FIG.

In step S31B of FIG. 8, the computer in the server 43 detects the maximum value of the data of the plurality of wireless tags 32-1 to 32-6 received in S31 as the processing target. That is, the maximum value is detected as the maximum temperature value from the temperature information of the plurality of loading areas 33a1 to 33a6 included in the data of the wireless tags 32-1 to 32-6. Further, the maximum value is detected as the maximum value of the acceleration from the acceleration information of the plurality of loading areas 33a1 to 33a6 included in the data of the wireless tags 32-1 to 32-6.

In step S26, the computer in the server 43 displays the maximum value of the temperature detected in S31B and the maximum value of the acceleration on the screen of the user terminal 44, respectively.

Therefore, even in the situation where the alarm is not output in S34, the administrator or the user who is accessing the server 43 via the user terminal 44 carries the cargo to be monitored by visually recognizing the display contents of the screen. It is possible to constantly grasp the maximum value of temperature and the maximum value of acceleration in the loading areas 33a1 to 33a6 of the cargo bed 33a of the vehicle. In this case, since only the maximum value is displayed, it is not necessary to monitor various numerical values at the same time, and the monitoring work becomes easy. Moreover, even before the alarm is output, the tendency of temperature and acceleration can be easily grasped.

<Other variants>
In the above description, the case where the temperature information detected by the wireless tags 32-1 to 32-6 is compared with the specified value for which the temperature upper limit is set is described, but the present invention is not limited to this, and the wireless tag 32-1 is not limited to this. Even if the temperature detected by ~ 32-6 is compared with the specified value that defines the lower limit of the temperature, or if the temperature is compared with the specified value that defines the appropriate temperature range and an alarm is output when the temperature deviates from this range. good.

Similarly, the on-board unit 10 detects the temperature farthest from the specified value defined as the predetermined appropriate temperature, instead of detecting the maximum value from the temperature information detected by the wireless tags 32-1 to 32-6. You may try to do it. Therefore, the on-board unit 10 can detect a case where the temperature is too lower than the specified value as the external environment of each luggage 31. That is, it is preferable to set the specified value not only according to the maximum value but also according to the external environment to be detected, such as the minimum value, the appropriate value, and the appropriate range. In addition to the above temperature and acceleration, the external environmental information may include parameters such as humidity and oxygen concentration that may affect the quality of the luggage during transportation of the luggage. Then, the wireless tags 32-1 to 32-6 enable detection of one or more types of parameters among these external environment information.

<Advantages of on-board equipment and luggage management system>
In the on-board unit 10 and the luggage management system shown in FIG. 2, external environmental information such as temperature and acceleration is individually detected by the wireless tags 32-1 to 32-6 attached to each luggage 31, and the situation is reported in real time. I can grasp it. Therefore, no matter where a large number of luggage 31s are placed on the loading platform 33a of a large vehicle, it is possible to accurately detect the external environmental information of each luggage 31, and the luggage 31 during transportation can be accurately detected. Information is available to help you avoid quality degradation. Further, since the information acquired by the on-board unit 10 is transmitted to the server 43, even when various luggages 31 are transported by a plurality of vehicles, the administrator can use the server 43 to transport all the luggages 31. You can grasp the situation at the same time.

Further, when the vehicle-mounted device 10 executes the operation shown in FIG. 7, the maximum values of the temperature and acceleration detected by each of the plurality of wireless tags 32-1 to 32-6 are constantly displayed on the vehicle-mounted device 10. be able to. Therefore, the driver of the vehicle or the like can instantly grasp the state of temperature and acceleration that affect the quality of the cargo 31 during transportation, and the work for monitoring the situation becomes easy.

Further, when the server 43 executes the operation shown in FIG. 8, the server 43 outputs the maximum values of the temperature and acceleration detected by each of the plurality of wireless tags 32-1 to 32-6 to the user terminal 44 or the like. can. Therefore, the manager and the user of each baggage can instantly grasp the state of temperature and acceleration that affect the quality of the baggage 31 being transported, and the work for monitoring the situation becomes easy.

Here, the features of the on-board unit and the luggage management system according to the above-described embodiment of the present invention are briefly summarized and listed below in [1] to [4], respectively.
[1] A plurality of tags (wireless tags 32-1 to 32-6) that are attached to each of the plurality of luggage (31) transported by the vehicle (33) and transmit a signal representing the external environment affecting each of the luggage. ) To the signal receiving unit (receiver 30) that receives the signal, respectively.
A data processing unit (microcomputer 11, S21) that collects data of the external environment transmitted by the plurality of tags based on the received signal of the signal receiving unit.
A wireless transmission unit (wide area wireless communication module 18,) that transmits at least a part of the data collected by the data processing unit to a predetermined external device (server 43) existing outside the vehicle by using wireless communication. S22) and
An on-board unit (10) characterized by being provided with.

[2] The data processing unit compares the data of the external environment transmitted by the plurality of tags with a predetermined threshold value, and outputs a predetermined alarm according to the comparison result (S23 to S23 to). S25)
The on-board unit according to the above [1].

[3] The data processing unit detects the maximum separation value most separated from the specified value among the data of the external environment transmitted by the plurality of tags, and records or outputs the data of the maximum separation value. It has a separation value detection unit (S21B),
The on-board unit according to the above [1] or [2].

[4] A luggage management system composed of at least one in-vehicle device (10) according to any one of the above [1] to [3] and the external device (server 43).

10 In-vehicle device 11 Microcomputer 12 Speed signal interface 13 Engine signal interface 14 GPS interface 15 Analog signal interface 16 External input interface 17 Tag signal interface 18 Wide area wireless communication module 19 Antenna 20 Non-volatile memory 21 Volatile memory 22 SD card 23 Switch input unit 24 Liquid crystal display 30 Receiver 31,31-1,31-2,31-3,31-4,31-5,31-6 Luggage 32,32-1,32-2,32-3,32-4,32 -5, 32-6 Wireless tag 32a Temperature sensor 32b Acceleration sensor 33 Vehicle 33a Loading platform 33a1, 33a2, 33a3, 33a4, 33a5, 33a6 Loading area 41 Wireless base station 42 Internet network 43 Server 44 User terminal DB1 Tag database DB2 Vehicle database DB3 Judgment condition database

Claims (3)

A signal receiving unit that receives signals from a plurality of tags that are attached to each of a plurality of packages transported by a vehicle and transmit signals representing an external environment including temperature and acceleration that affect the packages.
A data processing unit that collects data of the external environment transmitted by the plurality of tags based on the received signal of the signal receiving unit, and a data processing unit.
A wireless transmission unit that transmits at least a part of the data collected by the data processing unit to a predetermined external device existing outside the vehicle by using wireless communication.
Equipped with
The tag is an active tag that emits radio waves by electric power from a battery built in the tag, and is attached to the outer surface of the luggage.
The data processing unit detects the maximum separation value most distant from the specified value at each of the above-mentioned external environment data transmitted by the plurality of tags at each predetermined time point, and the maximum separation. It has a maximum separation value detector that records or outputs only value data.
An in-vehicle device characterized by that. The data processing unit has an alarm output unit that compares the data of the external environment transmitted by the plurality of tags with a predetermined threshold value and outputs a predetermined alarm according to the comparison result.
The on-board unit according to claim 1. A luggage management system including at least one on-board unit according to claim 1 or 2, and the external device.

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