JP6879967B2 - Transportation system and transportation information provision method - Google Patents

Description

The present invention relates to a transportation system and a transportation information providing method.

Conventionally, low-temperature liquefied gas such as oxygen and nitrogen is stored and transported in the cargo of a freight vehicle such as a tank lorry kept cold in a liquid state (see, for example, Patent Document 1). When pulling in such a freight vehicle, it is necessary for the customer at the delivery destination to be present due to legal regulations. However, the customer at the delivery destination does not have time to spare because he / she has daily work other than witnessing. Therefore, there is a demand for customers at the delivery destination to know when the freight vehicle will arrive. Therefore, the delivery time may be specified by the customer when ordering the cryogenic liquefied gas.

Japanese Unexamined Patent Publication No. 2013-189289

By the way, in the delivery of low-temperature liquefied gas, in order to improve efficiency, it may be delivered to a plurality of customers in one delivery. If each customer specifies a delivery time, it is necessary to go to the delivery destination with plenty of time so that there is no delay. Therefore, there are many restrictions on transportation, and the number of customers that can be transported may be smaller than when the time is not specified.
On the other hand, even if the delivery time is not specified, the customer may inquire about the arrival time. In this case, it is not preferable from the viewpoint of safety that the driver of the freight vehicle is asked to confirm the scheduled arrival time, and as a result, the driver is rushed. As described above, the conventional transportation method has a problem that it cannot be efficiently transported.

In view of the above circumstances, an object of the present invention is to provide a technique capable of efficiently transporting.

One aspect of the present invention is a transportation system for transporting liquefied gas, and position information acquisition for specifying the position information of the freight vehicle based on a plurality of information including at least information on the gas type transported by the freight vehicle. The unit, the arrival prediction date and time calculation unit that calculates the arrival prediction date and time from the current location specified by the acquired position information to the destination, the calculated arrival prediction date and time, and the calculated arrival prediction date and time are provided in advance to the destination. The registration unit that registers the estimated arrival date and time and the number of times that the information on the estimated arrival date and time is provided to the destination in the data table stored in the storage unit, and the registration unit that is registered in the data table. Judgment as to whether or not it is necessary to provide information on the estimated arrival date and time by using the estimated arrival date and time provided in advance to the destination and the number of times the information on the estimated arrival date and time is provided to the destination. A providing unit that provides the destination with the gas type carried by the freight vehicle and the estimated arrival date and time at the destination when the determination unit determines that the information needs to be provided. It is a transportation system equipped with.

One aspect of the present invention is the above-mentioned transportation system, in which the providing unit has a predicted arrival date and time calculated by the predicted arrival date and time calculation unit and an estimated arrival date and time provided in advance to the destination. When the difference from and exceeds a predetermined threshold value, information indicating that the freight vehicle is delayed or arrives early is provided.

One aspect of the present invention is the above-mentioned transportation system, in which the provision unit transports the same gas type or different gas types to the same destination by a plurality of freight vehicles on the same day. The gas type and the estimated arrival date and time are provided in combination.

One aspect of the present invention is the transportation system, wherein the providing unit provides the gas type and the estimated arrival date and time to both the destination and the freight vehicle.

One aspect of the present invention is the transportation system, and when the providing unit does not provide the estimated arrival date and time to the destination in advance, the calculated arrival estimated date and time is set to the freight vehicle. It is provided as an estimated arrival date and time at the destination.

One aspect of the present invention is a method of providing transportation information in a transportation system for transporting liquefied gas, and the position information of the freight vehicle is obtained based on a plurality of information including at least information on the gas type transported by the freight vehicle. The location information acquisition step to be specified, the arrival prediction date and time calculation step for calculating the arrival prediction date and time from the current location to the destination specified by the acquired position information, the calculated arrival prediction date and time, and the destination. A registration step for registering the estimated arrival date and time provided in advance and the number of times the information on the estimated arrival date and time is provided to the destination in the data table stored in the storage unit, and the data table. It is necessary to provide information on the estimated arrival date and time using the estimated arrival date and time provided in advance to the destination registered in the above and the number of times the information on the estimated arrival date and time is provided to the destination. The determination step for determining whether or not, and when it is determined in the determination step that the information needs to be provided, the gas type carried by the freight vehicle and the estimated arrival date and time at the destination are set to the destination. It is a transportation information providing method having a providing step and providing to.

According to the present invention, it becomes possible to carry it efficiently.

It is a system block diagram which shows the structure of a transportation system. It is a schematic block diagram which shows the functional structure of the operation management system in this embodiment. It is a schematic block diagram which shows the functional structure of the server in this embodiment. It is a schematic block diagram which shows the functional structure of the server for customers in this embodiment. It is a figure which shows an example of the data table which a data storage part stores. It is a figure for demonstrating the processing flow of a transportation system in a normal time. It is a figure which shows an example of a normal mail. It is a figure for demonstrating the processing flow of the transportation system at the time of delay. It is a figure which shows an example of a delayed mail. It is a flowchart which shows the processing flow of the server for a customer.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a system configuration diagram showing the configuration of the transportation system 100.
The transportation system 100 includes an operation management system 10, a server 20, and a customer server 30. The operation management system 10 and the server 20 and the server 20 and the customer server 30 are communicably connected via a network, and data linkage is performed. The network may be any configured network. For example, the network is the Internet. Data linkage means sharing data between different devices and systems.

The operation management system 10 is a system that manages the operation of the freight vehicle 40. Specifically, the operation management system 10 starts from the current location of the freight vehicle 40 based on the operation plan registered by the delivery company that owns the freight vehicle 40 and the position information of the freight vehicle 40 obtained from the freight vehicle 40. The estimated arrival date and time to the destination is calculated, and the calculated arrival estimated date and time information and the operation plan are data-linked between the server 20 and the server 20. The operation plan is a plan related to the operation of the freight vehicle 40 prepared in advance by the delivery company. The operation plan includes, for example, information on the company / business name, the type of the freight vehicle 40, the gas type carried by the freight vehicle 40, the departure place, the destination, the estimated date and time of the operation plan, and the like.

Here, the type of the freight vehicle 40 includes information on the type of gas that can be transported, the presence / absence of a liquid feed pump, the maximum load capacity, and the equipment mounted on the freight vehicle 40. The gas type includes the name of the gas such as nitrogen and oxygen, the purity of the gas, the impurities and the content contained in the gas, and the like. The gas type information is information on the cryogenic liquefied gas to be transported. For example, if it relates to the type of low temperature liquefied gas, it may be nitrogen, oxygen, argon, carbon dioxide, hydrogen or the like. Further, even if the gas type is the same, information on the gas type specified in advance by the customer, such as the purity of the gas and the type and amount of impurities contained, may be included. The estimated operation plan date and time represents the date and time determined in advance by the delivery company as the date and time when the freight vehicle 40 arrives at the customer's place (destination).

Further, the operation management system 10 also data-links information such as the position information of the freight vehicle 40 and the load capacity information of the cargo carried by the freight vehicle 40 with the server 20. The operation management system 10 is configured by using an information processing device such as a personal computer. The operation management system 10 has a predetermined time in the operation plan in which the information obtained from the freight vehicle 40 matches at least two or more types of the company / business operator name, the type of the freight vehicle 40, and the gas type included in the operation plan. The operation plan that is scheduled to arrive at the destination (customer's location) later (for example, 30 minutes later) is the target of data linkage. The operation management system 10 is a so-called car navigation system, and a part thereof may be substituted.

The server 20 data-links information shared with the operation management system 10 by data linkage with the customer server 30. Further, the server 20 receives an order for a gas type from a customer, and requests delivery to a delivery company according to the received order. The server 20 is configured by using an information processing device such as a personal computer.
The customer server 30 provides the customer with information on the estimated arrival date and time of the freight vehicle 40 based on the information shared with the server 20 by data linkage. For example, the customer server 30 provides information on the estimated arrival date and time of the freight vehicle 40 by e-mail or a customer-specific My Page. The customer server 30 is configured by using an information processing device such as a personal computer.

The freight vehicle 40 is a vehicle for transporting a container for storing a low-temperature liquefied gas such as oxygen or nitrogen in a liquid state. The freight vehicle 40 is, for example, a tank truck. The freight vehicle 40 includes an in-vehicle terminal, GPS (Global Positioning System) and LI (Load Indicator). The in-vehicle terminal provides the driver with information obtained from the route to the destination and the server 20. GPS acquires the position information of the freight vehicle 40. The in-vehicle terminal transmits the position information acquired by the GPS of the freight vehicle 40 and the information on the company / business name, the type of the freight vehicle 40, and the gas type carried by the freight vehicle 40 to the operation management system 10. .. The LI is an in-vehicle weight scale, measures the weight of the cargo carried by the freight vehicle 40, and transmits the measurement result to the operation management system 10 as weight information which is the load capacity.

FIG. 2 is a schematic block diagram showing a functional configuration of the operation management system 10 according to the present embodiment. The operation management system 10 includes a CPU (Central Processing Unit), a memory, an auxiliary storage device, and the like connected by a bus, and executes a program. By executing the program, the operation management system 10 functions as a device including an acquisition unit 11, a storage unit 12, an arrival prediction date / time calculation unit 13, and a data linkage unit 14. All or part of each function of the operation management system 10 may be realized by using hardware such as ASIC (Application Specific Integrated Circuit), PLD (Programmable Logic Device), and FPGA (Field Programmable Gate Array). .. The program may also be recorded on a computer-readable recording medium. The computer-readable recording medium is, for example, a flexible disk, a magneto-optical disk, a portable medium such as a ROM or a CD-ROM, or a storage device such as a hard disk built in a computer system. The program may also be transmitted and received via a telecommunication line.

The acquisition unit 11 acquires various types of information. Specifically, the acquisition unit 11 acquires the operation plan and information on the freight vehicle (hereinafter referred to as "freight vehicle information"). The information on the freight vehicle is, for example, location information, load capacity information, company / business name, type of freight vehicle 40, information on gas type carried by the freight vehicle 40, and the like.

The acquisition unit 11 acquires the freight vehicle information from the freight vehicle 40. The acquisition unit 11 may acquire the freight vehicle information by another method. For example, the acquisition unit 11 may acquire the freight vehicle information input by the employee of the delivery company by directly operating the operation management system 10, or the employee of the delivery company may acquire another communication device (for example, a tablet terminal or a personal computer). An information processing device such as a computer) may be connected to the operation management system 10 to acquire the freight vehicle information input from another communication device, or the freight vehicle information stored in the server on the cloud may be acquired. May be good. In addition, the acquisition unit 11 acquires the operation plan by input from the terminal device possessed by the delivery company.

The storage unit 12 is configured by using a storage device such as a magnetic hard disk device or a semiconductor storage device. The storage unit 12 stores various information. Specifically, the storage unit 12 stores the operation plan 121 and the freight vehicle information 122 acquired by the acquisition unit 11, and the map information 123. The map information 123 may be stored in the operation management system 10 in advance.

The arrival prediction date and time calculation unit 13 calculates the arrival prediction date and time based on the information stored in the storage unit 12. Specifically, first, the arrival prediction date / time calculation unit 13 determines the route from the current location of the freight vehicle 40 to the destination based on the operation plan 121, the position information included in the freight vehicle information 122, and the map information 123. decide. The arrival prediction date / time calculation unit 13 determines a route that can be taken from the current location to the destination by the main road. Next, the arrival prediction date / time calculation unit 13 calculates the time to the destination based on the distance of the determined route and the speed of the preset freight vehicle 40. Then, the arrival prediction date and time calculation unit 13 calculates the arrival prediction date and time by adding the calculated time to the current time.

The data linkage unit 14 transfers the information of the arrival prediction date and time calculated by the arrival prediction date and time calculation unit 13 and the information stored in the storage unit 12 (for example, the operation plan 121 and the freight vehicle information 122) with the server 20. Share between.

FIG. 3 is a schematic block diagram showing the functional configuration of the server 20 in the present embodiment. The server 20 includes a CPU, a memory, an auxiliary storage device, and the like connected by a bus, and executes a program. By executing the program, the server 20 functions as a device including the acquisition unit 21, the storage unit 22, and the data linkage unit 23. In addition, all or a part of each function of the server 20 may be realized by using hardware such as ASIC, PLD and FPGA. The program may also be recorded on a computer-readable recording medium. The computer-readable recording medium is, for example, a flexible disk, a magneto-optical disk, a portable medium such as a ROM or a CD-ROM, or a storage device such as a hard disk built in a computer system. The program may also be transmitted and received via a telecommunication line.

The acquisition unit 21 acquires various types of information. Specifically, the acquisition unit 21 acquires the information shared by the operation management system 10 and the order information from the customer.
The storage unit 22 is configured by using a storage device such as a magnetic hard disk device or a semiconductor storage device. The storage unit 22 stores the information acquired by the acquisition unit 21. For example, the storage unit 22 stores the information shared by the operation management system 10 (information on the estimated arrival date and time, the operation plan 121, and the freight vehicle information 122), and the order information from the customer.

The data linkage unit 23 shares the information stored in the storage unit 22 with the customer server 30. Specifically, the data linkage unit 23 shares the information shared by the operation management system 10 with the customer server 30.

FIG. 4 is a schematic block diagram showing a functional configuration of the customer server 30 in the present embodiment. The customer server 30 includes a CPU, a memory, an auxiliary storage device, and the like connected by a bus, and executes a program. By executing the program, the customer server 30 functions as a device including an acquisition unit 31, a data registration unit 32, a data storage unit 33, a mail generation unit 34, a mail transmission unit 35, and a screen providing unit 36. In addition, all or a part of each function of the customer server 30 may be realized by using hardware such as ASIC, PLD, and FPGA. The program may also be recorded on a computer-readable recording medium. The computer-readable recording medium is, for example, a flexible disk, a magneto-optical disk, a portable medium such as a ROM or a CD-ROM, or a storage device such as a hard disk built in a computer system. The program may also be transmitted and received via a telecommunication line.

The acquisition unit 31 acquires the information shared by the server 20.
The data registration unit 32 generates a data table by registering data based on the information acquired by the acquisition unit 31.

FIG. 5 is a diagram showing an example of a data table stored in the data storage unit 33.
The data table has multiple records that represent information about the customer. The record has each value of company / business establishment, gas name, operation plan predicted date / time, arrival predicted date / time, transmission arrival predicted date / time, transmission state, and transmission frequency. The value of the company / business establishment represents the customer's company / business establishment that is the destination of the freight vehicle 40. The value of the gas name represents the name of the gas type carried by the freight vehicle 40. The gas name is, for example, LO (Liquid Oxygen: liquid oxygen), LN (Liquid Nitrogen: liquid nitrogen), or the like. The value of the estimated arrival date and time represents the estimated date and time when the freight vehicle 40 calculated by the operation management system 10 arrives at the customer's place.

The value of the estimated transmission arrival date and time represents the date and time provided to the customer as the estimated date and time when the freight vehicle 40 arrives at the customer's location. The sending status value represents the sending status of the email to the customer. The transmission state is represented by, for example, 0, 1, or 2. "0" in the sending state means that the mail has never been sent to the customer. "1" in the sending state indicates that a normal mail has been sent to the customer. "2" in the sending state indicates that a delayed mail has been sent to the customer. The number of times sent value represents the total number of times an email has been sent to the customer. If the email has not been sent to the customer, the value of the estimated date and time of arrival will not be registered.

In FIG. 5, in the record registered at the top of the data table, the value of the company / business establishment is "○○ business establishment", the value of the gas name is "gas A", and the value of the operation plan forecast date and time is "20XX". / YY / ZZ 10:00 ", the value of the estimated arrival date and time is" 20XX / YY / ZZ 10:00 ", the value of the estimated transmission arrival date and time is" 20XX / YY / ZZ 10:00 ", and the value of the transmission state is" 1 (normal) ”, the value of the number of transmissions is“ 1 ”. That is, "Gas A" is transported to the "○○ office", the estimated operation plan date and time is "20XX / YY / ZZ 10:00", and the estimated arrival date and time is "20XX / YY / ZZ 10:00". It means that the predicted arrival date and time of transmission is "20XX / YY / ZZ 10:00", the normal email is sent to the customer, and a total of one email is sent to the customer. There is.

Further, in FIG. 5, in the record registered in the second row of the data table, the value of the company / business establishment is “△△ business establishment”, the value of the gas name is “gas B”, and the value of the operation plan forecast date and time. Is "20XX / YY / ZZ 10:00", the value of the estimated arrival date and time is "20XX / YY / ZZ 10:40", the value of the estimated transmission arrival date and time is "20XX / YY / ZZ 10:20", and the transmission state The value is "2 (delay)", and the value of the number of transmissions is "2". That is, "Gas B" is transported to the "△△ office", the estimated operation plan date and time is "20XX / YY / ZZ 10:00", and the estimated arrival date and time is "20XX / YY / ZZ 10:40". It means that the estimated transmission arrival date and time is "20XX / YY / ZZ 10:20", the delayed mail is sent to the customer, and the mail is sent to the customer twice in total. There is.

Further, in FIG. 5, in the record registered in the third row of the data table, the value of the company / business establishment is "□□ business establishment", the value of the gas name is "gas C", and the value of the operation plan forecast date and time. Is "20XX / YY / ZZ 10:00", the value of the estimated arrival date and time is "20XX / YY / ZZ 10:00", the value of the estimated transmission arrival date and time is "-", and the value of the transmission state is "0 (not yet)". , The value of the number of transmissions is "0". That is, "Gas C" is transported to the "□□ office", the estimated operation plan date and time is "20XX / YY / ZZ 10:00", and the estimated arrival date and time is "20XX / YY / ZZ 10:00". It is shown that no e-mail has been sent to the "□□ office".

Returning to FIG. 4, the description of the customer server 30 will be continued.
The data storage unit 33 is configured by using a storage device such as a magnetic hard disk device or a semiconductor storage device. The data storage unit 33 stores the data table generated by the data registration unit 32.
The mail generation unit 34 generates a mail to be sent to the customer based on the data table. Specifically, the mail generation unit 34 refers to the item of the scheduled transmission arrival date and time in the data table, and is usually when the value is not registered in the item of the scheduled transmission arrival date and time and the number of transmissions is 0. Generate an email. The normal e-mail is an e-mail for notifying the customer that the freight vehicle 40 is about to arrive. On the other hand, the mail generation unit 34 refers to the item of the estimated arrival date and time and the item of the estimated transmission arrival date and time in the data table, and when the difference between the estimated arrival date and time and the estimated transmission arrival date and time exceeds a predetermined threshold value. If there is a delay in the freight vehicle 40, a delay mail is generated. More specifically, the mail generation unit 34 determines that the freight vehicle 40 is delayed when the estimated arrival date and time exceeds the predetermined threshold value and the date and time have passed. Generate delayed mail. The delayed mail is an mail for notifying the customer that the arrival of the freight vehicle 40 is delayed. Here, the predetermined threshold value is, for example, 15 minutes. The mail generation unit 34 does not generate a mail when the difference between the predicted arrival date and time and the predicted transmission arrival date and time is equal to or less than a predetermined threshold value and the number of transmissions is 1 or more.

The mail sending unit 35 sends the mail generated by the mail generating unit 34 to the customer. The mail sending unit 35 is a specific example of the providing unit.
The screen providing unit 36 generates screen data to be provided to the customer in response to a request from the customer, and provides the generated screen data to the customer. The screen providing unit 36 is a specific example of the providing unit.
In this way, when an e-mail is sent to the customer, or when screen data is provided to the customer by the screen providing unit 36, the same information is displayed on the in-vehicle terminal of the freight vehicle 40. For example, when either the mail sending unit 35 or the screen providing unit 36 sends an email to the customer, or when the screen data provided by the screen providing unit 36 is provided to the customer, the cargo is delivered via the server 20. The gas type and the estimated arrival date and time are provided to the automobile 40. As a result, the gas type and the estimated arrival date and time are displayed on the in-vehicle terminal of the freight vehicle 40. With such a display, the driver of the freight vehicle 40 can confirm that the operation status of the freight vehicle 40 is provided to the customer, and can focus on the transportation with peace of mind.

Next, the processing flow of the transportation system 100 will be described with reference to FIGS. 6 to 9.
FIG. 6 is a diagram for explaining a processing flow of the transportation system 100 in a normal time. FIG. 7 is a diagram showing an example of a normal mail. FIG. 8 is a diagram for explaining a processing flow of the transportation system 100 at the time of delay. FIG. 9 is a diagram showing an example of delayed mail. Here, the normal time is a case where the scheduled arrival date and time does not exceed a predetermined threshold value, that is, a case where the arrival of the freight vehicle 40 to the customer is not delayed. Here, the time of delay is a case where the scheduled arrival date and time exceeds a predetermined threshold value, that is, a case where the arrival of the freight vehicle 40 to the customer is delayed.

In the explanation of FIGS. 6 and 8, the estimated operation plan date and time is "11:00", the predetermined threshold value is 15 minutes, and the presence or absence of e-mail transmission every 5 minutes from 30 minutes before the estimated operation plan date and time. Judgment shall be made. Further, in the description of FIGS. 6 and 8, only the parts necessary for simplification of the description will be described.

As shown in FIG. 6, it is assumed that the operation plan indicating that the delivery company will arrive at the customer's place at "11:00" is registered in the operation management system 10 the day before. The operation management system 10 data-links the operation plan predicted date and time “11:00” and the arrival predicted date and time “11:00” indicated in the operation plan to the server 20. Since the freight vehicle 40 is not actually running on the previous day, the operation management system 10 uses information on the same date and time as the operation plan predicted date and time as the arrival predicted date and time. Further, the server 20 data-links the information linked by the operation management system 10 to the customer server 30.

The data registration unit 32 of the customer server 30 generates a record of the data table based on the information linked with the data by the server 20. Specifically, the data registration unit 32 registers the information linked by the server 20 (for example, the operation plan predicted date and time “11:00” and the arrival predicted date and time “11:00”) in the corresponding items. Generates a record in the data table. Since the e-mail was not transmitted on the previous day, the data registration unit 32 of the customer server 30 sets the transmission state and the number of transmissions of the data table to "0" as the initial state.

The arrival prediction date / time calculation unit 13 of the operation management system 10 calculates the arrival prediction date / time based on the position information of the freight vehicle 40 and the map information 30 minutes before the operation plan prediction date / time “11:00”. Here, it is assumed that the estimated arrival date and time is "11:01". Then, the data linkage unit 14 data-links the operation plan predicted date and time “11:00” and the arrival predicted date and time “11:01” indicated in the operation plan to the server 20. The server 20 data-links the information linked by the operation management system 10 to the customer server 30.

The data registration unit 32 of the customer server 30 refers to the record in the data table, and the information linked by the server 20 (for example, the operation plan predicted date and time “11:00” and the arrival predicted date and time “11:01”). Update the data table record by registering in the corresponding item. For example, in the example shown in FIG. 6, the data registration unit 32 corresponds to the information linked by the server 20 (for example, the operation plan predicted date and time “11:00” and the arrival predicted date and time “11:01”). Update the operation plan forecast date and time and arrival forecast date and time values in the data table.

After that, the mail generation unit 34 refers to the estimated arrival date and time of the record in the data table, the estimated transmission arrival date and time, and the number of transmissions, and determines whether or not the mail is generated. In the example shown at "10:30" (30 minutes before the arrival prediction), the transmission arrival prediction date and time of the record in the data table is "-", and the transmission count is "0". Therefore, the mail generation unit 34 determines that a normal mail is generated. The mail generation unit 34 generates a normal mail as shown in FIG. 7 and outputs it to the mail transmission unit 35. As shown in FIG. 7, the normal mail 50 includes information indicating that the freight vehicle 40 is about to arrive, a gas name, and information on an estimated arrival date and time as information for the customer. The mail sending unit 35 usually sends a mail to the customer. After that, the mail transmission unit 35 notifies the data registration unit 32 that the normal mail has been transmitted.

The explanation will be continued by returning to FIG.
The data registration unit 32 updates the record in the data table based on the notification by the mail transmission unit 35. Specifically, the data registration unit 32 updates by registering the estimated arrival date and time described in the normal mail in the item of the estimated transmission arrival date and time in the data table, and updates the transmission state to "1 (normal)". Update the number of transmissions to "1".

The arrival prediction date / time calculation unit 13 of the operation management system 10 is based on the position information of the freight vehicle 40 and the map information when another 5 minutes have passed, that is, 25 minutes before the operation plan prediction date / time “11:00”. To calculate the estimated arrival date and time. Here, it is assumed that the estimated arrival date and time is "11:16". Then, the data linkage unit 14 data-links the operation plan predicted date and time “11:00” and the arrival predicted date and time “11:16” indicated in the operation plan to the server 20. The server 20 data-links the information linked by the operation management system 10 to the customer server 30.

The data registration unit 32 of the customer server 30 generates a record of the data table based on the information linked with the data by the server 20. Specifically, the data registration unit 32 registers the information linked by the server 20 (for example, the operation plan predicted date and time "11:00" and the arrival predicted date and time "11:16") in the corresponding items. Generates a record in the data table. If the data table already has a record in which the company / business establishment, the gas name, and the estimated date and time of the operation plan match, the data registration unit 32 updates the data by overwriting the already registered record. For example, in the example shown in FIG. 6, the data registration unit 32 corresponds to the information linked by the server 20 (for example, the operation plan predicted date and time “11:00” and the arrival predicted date and time “11:16”). Update the operation plan forecast date and time and arrival forecast date and time values in the data table.

After that, the mail generation unit 34 refers to the estimated arrival date and time of the record in the data table, the estimated transmission arrival date and time, and the number of transmissions, and determines whether or not the mail is generated. In the example shown at "10:35", the estimated arrival date and time of the record in the data table is "11:16", the estimated transmission arrival date and time is "11:01", and the number of transmissions is "1". In this case, since the difference between the estimated arrival date and time and the estimated transmission arrival date and time is within 15 minutes and the number of transmissions is one or more, the mail generation unit 34 determines that it is not necessary to generate a mail.

The arrival prediction date / time calculation unit 13 of the operation management system 10 obtains the position information of the freight vehicle 40 and the map information when another 5 minutes have passed, that is, 20 minutes before the operation plan prediction date / time "11:00". Calculate the estimated arrival date and time based on this. Here, it is assumed that the estimated arrival date and time is "11:17". Then, the data linkage unit 14 data-links the operation plan predicted date and time “11:00” and the arrival predicted date and time “11:17” indicated in the operation plan to the server 20. The server 20 data-links the information linked by the operation management system 10 to the customer server 30.

The data registration unit 32 of the customer server 30 generates a record of the data table based on the information linked with the data by the server 20. Specifically, the data registration unit 32 registers the information linked by the server 20 (for example, the operation plan predicted date and time “11:00” and the arrival predicted date and time “11:17”) in the corresponding items. Generates a record in the data table. If the data table already has a record in which the company / business establishment, the gas name, and the estimated date and time of the operation plan match, the data registration unit 32 updates the data by overwriting the already registered record. For example, in the example shown in FIG. 7, the data registration unit 32 corresponds to the information linked by the server 20 (for example, the operation plan predicted date and time “11:00” and the arrival predicted date and time “11:17”). Update the operation plan forecast date and time and arrival forecast date and time values in the data table.

After that, the mail generation unit 34 refers to the estimated arrival date and time of the record in the data table, the estimated transmission arrival date and time, and the number of transmissions, and determines whether or not the mail is generated. In the example shown at "10:40", the estimated arrival date and time of the record in the data table is "11:17", the estimated transmission arrival date and time is "11:01", and the number of transmissions is "1". In this case, the difference between the estimated arrival date and time "11:17" and the estimated transmission arrival date and time "11:01" exceeds 15 minutes. Therefore, the mail generation unit 34 determines that the delayed mail is generated. The mail generation unit 34 generates a delayed mail as shown in FIG. 9 and outputs it to the mail transmission unit 35. As shown in FIG. 9, the delay mail 60 includes information indicating that the freight vehicle 40 is delayed, a gas name, and information on a new estimated arrival date and time as information for the customer. The mail sending unit 35 sends a delayed mail to the customer. After that, the mail sending unit 35 notifies the data registration unit 32 that the delayed mail has been transmitted.

The data registration unit 32 updates the record in the data table based on the notification by the mail transmission unit 35. Specifically, the data registration unit 32 updates by registering a new arrival prediction date and time described in the delay mail in the transmission arrival prediction date and time item of the data table, and updates the transmission status to "2 (delay)". , Update the number of transmissions to "2".

The arrival prediction date / time calculation unit 13 of the operation management system 10 is based on the position information of the freight vehicle 40 and the map information when another 5 minutes have passed, that is, 25 minutes before the operation plan prediction date / time “11:00”. To calculate the estimated arrival date and time. Here, it is assumed that the estimated arrival date and time is "11:16". Then, the data linkage unit 14 data-links the operation plan predicted date and time “11:00” and the arrival predicted date and time “11:16” indicated in the operation plan to the server 20. The server 20 data-links the information linked by the operation management system 10 to the customer server 30.

The data registration unit 32 of the customer server 30 generates a record of the data table based on the information linked with the data by the server 20. Specifically, the data registration unit 32 registers the information linked by the server 20 (for example, the operation plan predicted date and time "11:00" and the arrival predicted date and time "11:16") in the corresponding items. Generates a record in the data table. If the data table already has a record in which the company / business establishment, the gas name, and the estimated date and time of the operation plan match, the data registration unit 32 updates the data by overwriting the already registered record. For example, in the example shown in FIG. 6, the data registration unit 32 corresponds to the information linked by the server 20 (for example, the operation plan predicted date and time “11:00” and the arrival predicted date and time “11:16”). Update the operation plan forecast date and time and arrival forecast date and time values in the data table.

After that, the mail generation unit 34 refers to the estimated arrival date and time of the record in the data table, the estimated transmission arrival date and time, and the number of transmissions, and determines whether or not the mail is generated. In the example shown at "10:35", the estimated arrival date and time of the record in the data table is "11:16", the estimated transmission arrival date and time is "11:01", and the number of transmissions is "1". In this case, since the difference between the estimated arrival date and time "11:16" and the estimated transmission arrival date and time "11:01" is within 15 minutes and the number of transmissions is one or more, the mail generation unit 34 sends an email. Is determined that it is not necessary to generate.

Next, it will be described with reference to FIG. The arrival prediction date / time calculation unit 13 of the operation management system 10 obtains the position information of the freight vehicle 40 and the map information when another 5 minutes have passed, that is, 15 minutes before the operation plan prediction date / time “11:00”. Calculate the estimated arrival date and time based on this. Here, it is assumed that the estimated arrival date and time is "11:32". Then, the data linkage unit 14 data-links the operation plan predicted date and time “11:00” and the arrival predicted date and time “11:32” indicated in the operation plan to the server 20. The server 20 data-links the information linked by the operation management system 10 to the customer server 30.

The data registration unit 32 of the customer server 30 generates a record of the data table based on the information linked with the data by the server 20. Specifically, the data registration unit 32 registers the information linked by the server 20 (for example, the operation plan predicted date and time “11:00” and the arrival predicted date and time “11:32”) in the corresponding items. Generates a record in the data table. If the data table already has a record in which the company / business establishment, the gas name, and the estimated date and time of the operation plan match, the data registration unit 32 updates the data by overwriting the already registered record. For example, in the example shown in FIG. 8, the data registration unit 32 corresponds to the information linked by the server 20 (for example, the operation plan predicted date and time “11:00” and the arrival predicted date and time “11:32”). Update the operation plan forecast date and time and arrival forecast date and time values in the data table.

After that, the mail generation unit 34 refers to the estimated arrival date and time of the record in the data table, the estimated transmission arrival date and time, and the number of transmissions, and determines whether or not the mail is generated. In the example shown at "10:45", the estimated arrival date and time of the record in the data table is "11:32", the estimated transmission arrival date and time is "11:17", and the number of transmissions is "2". In this case, since the difference between the estimated arrival date and time and the estimated transmission arrival date and time is within 15 minutes and the number of transmissions is one or more, the mail generation unit 34 determines that it is not necessary to generate a mail.

If the difference between the estimated arrival date and time and the estimated transmission arrival date and time is 15 minutes or more, the mail generation unit 34 determines that a delayed mail is generated. The mail generation unit 34 generates a delayed mail and outputs it to the mail transmission unit 35. The mail sending unit 35 sends a delayed mail to the customer. After that, the mail sending unit 35 notifies the data registration unit 32 that the delayed mail has been transmitted. In this case, the data registration unit 32 updates by registering a new estimated arrival date and time described in the delayed mail in the item of the estimated transmission arrival date and time in the data table, updates the transmission state to "2 (delay)", and transmits. Update the number of times to "3".

FIG. 10 is a flowchart showing a processing flow of the customer server 30. The process of FIG. 10 is executed every time the server 20 performs data linkage and updates the estimated arrival date and time.
The mail generation unit 34 determines whether or not it is necessary to send an mail based on the data table stored in the data storage unit 33 (step S101). The mail generation unit 34 refers to the estimated arrival date and time of the record in the data table, the estimated transmission arrival date and time, and the number of transmissions, and when the estimated transmission arrival date and time is not registered and the number of transmissions is "0", the arrival prediction It is determined that it is necessary to send an email when the time difference between the date and time and the estimated date and time of arrival of transmission exceeds a predetermined threshold. On the other hand, the mail generation unit 34 determines that it is not necessary to send the mail in other cases.

When it is not necessary to send an e-mail (step S101-NO), the customer server 30 ends the process.
On the other hand, when it is necessary to send an e-mail (step S101-YES), the e-mail generation unit 34 determines whether to send a normal e-mail or a delayed e-mail (step S102). Specifically, the mail generation unit 34 determines that a normal mail is transmitted when the estimated transmission arrival date and time is not registered and the number of transmissions is "0". On the other hand, the mail generation unit 34 determines that the delayed mail is transmitted when the time difference between the predicted arrival date and time and the predicted transmission arrival date and time is delayed by exceeding a predetermined threshold value.

When it is determined to send a normal mail (step S102-normal mail), the mail generation unit 34 generates a normal mail (step S103). The mail generation unit 34 outputs the generated normal mail to the mail transmission unit 35. The mail transmission unit 35 sends the generated normal mail to the customer.

On the other hand, when it is determined to send the delayed mail (step S102-delayed mail), the mail generation unit 34 generates the delayed mail (step S105). The mail generation unit 34 outputs the generated delayed mail to the mail transmission unit 35. The mail sending unit 35 sends the generated delayed mail to the customer (step S106).

According to the transportation system 100 configured as described above, efficient transportation becomes possible. Specifically, the transportation system 100 normally sends an e-mail to the customer at a predetermined time before the estimated arrival date and time shown in the operation plan. After that, the transportation system 100 determines the difference between the estimated arrival date and time to the destination obtained based on the position information of the freight vehicle 40 and the estimated arrival date and time provided to the customer by ordinary e-mail at predetermined intervals. Whether or not to send an email is determined based on. If the difference between the estimated arrival date and time to the destination obtained based on the position information of the freight vehicle 40 and the estimated arrival date and time provided to the customer by ordinary e-mail exceeds a predetermined threshold value, the freight A delay mail indicating that the vehicle 40 is delayed is sent to the customer. Therefore, the customer can know when the freight vehicle 40 will arrive. As a result, the number of inquiries from customers can be reduced. As a result, there is no need to confirm with the driver of the freight vehicle 40. Therefore, efficient transportation becomes possible.

<Modification example>
The operation management system 10 holds the operation plan 121 for a predetermined period (for example, the day or the day before the operation plan 121), and deletes the operation plan 121 other than the predetermined period (for example, the day before the previous day). It may be configured.
Generally, the freight vehicle 40 that can be transported is limited according to the gas type, or the vehicle type of the freight vehicle 40 may be specified. Therefore, when an order is received from the customer, the server 20 creates an operation plan on the condition of either the gas type ordered by the customer, the vehicle type of the freight vehicle 40 ordered by the customer, or the qualification. You may ask the delivery company. Then, the server 20 requests a delivery company that has created an operation plan that satisfies the conditions. As a result, the delivery company for which the request has been made registers the operation plan in the operation management system 10, and the operation management system 10 performs data linkage.

The arrival prediction date / time calculation unit 13 of the operation management system 10 is configured to calculate the arrival prediction date / time by learning the route from the position of the freight vehicle 40 to the destination and the past route to the same destination. May be good.
The operation management system 10 and the server 20 may be configured as one system. Further, the server 20 and the customer server 30 may be configured as one device.

In the present embodiment, the mail generation unit 34 of the customer server 30 shows a configuration for generating a delayed mail when the arrival of the freight vehicle 40 at the destination is delayed, that is, when the freight vehicle 40 is delayed. However, if the freight vehicle 40 is expected to arrive early, it may be configured to generate an early arrival mail. The early arrival mail is an mail for notifying the customer that the arrival of the freight vehicle 40 is earlier than the estimated arrival date and time. When configured in this way, the mail generation unit 34 refers to the item of the estimated arrival date and time and the item of the estimated transmission arrival date and time in the data table, and the difference between the estimated arrival date and time and the estimated transmission arrival date and time is predetermined. When the threshold value is exceeded and the freight vehicle 40 arrives at the destination early, an early arrival mail is generated. More specifically, the mail generation unit 34 determines that the freight vehicle 40 arrives at the destination early when the estimated arrival date and time exceeds the predetermined threshold value and earlier than the estimated transmission arrival date and time, and sends an early arrival mail. Generate. For example, if the predetermined threshold value is 15 minutes, the estimated arrival date and time is 12 o'clock, and the estimated transmission arrival date and time is 12:30, the estimated arrival date and time exceeds the predetermined threshold value as compared with the estimated transmission arrival date and time. Because it is fast, the mail generation unit 34 generates an early arrival mail. The mail sending unit 35 sends the generated early arrival mail to the customer.
With this configuration, it is possible to notify the customer in advance of information even when there is a possibility of arriving at the destination early.

When the customer server 30 sends a delayed mail to the customer, the customer server 30 may notify the server 20 that the delayed mail has been sent. When configured in this way, the customer server 30 has information indicating that the delayed mail has been sent and information about the customer to whom the delayed mail is sent (for example, company / business name, gas type, destination, etc.). ) To the server 20. In response to the notification from the customer server 30, the server 20 notifies the in-vehicle terminal of the freight vehicle 40 that is transporting the delayed mail to the customer, that the delayed mail has been transmitted.

When the customer server 30 sends a normal mail to the customer, the customer server 30 may notify the server 20 that the normal mail has been sent. When configured in this way, the customer server 30 has information indicating that the normal mail has been sent and information about the customer to whom the normal mail is sent (for example, company / business name, gas type, destination, etc.). ) To the server 20. In response to the notification from the customer server 30, the server 20 notifies the in-vehicle terminal of the freight vehicle 40 that is transporting to the customer, which is the destination of the normal mail, that the normal mail has been transmitted.

When the customer server 30 sends an early arrival mail to the customer, the customer server 30 may notify the server 20 that the early arrival mail has been sent. When configured in this way, the customer server 30 has information indicating that the early arrival mail has been sent and information about the customer to whom the early arrival mail is sent (for example, company / business name, gas type, purpose). Notify the server 20 of (land, etc.). In response to the notification from the customer server 30, the server 20 notifies the in-vehicle terminal of the freight vehicle 40 that is transporting to the customer to whom the early arrival mail is sent that the early arrival mail has been transmitted. ..

In the present embodiment, the mail generation unit 34 shows a configuration in which it is determined that a mail needs to be sent when the estimated transmission arrival date and time is not registered and the number of transmissions is “0”. However, the mail generation unit 34 may determine that it is necessary to send the mail when the estimated transmission arrival date and time is not registered or when the number of transmissions is "0". ..

The server 20 may be configured to determine the presence or absence of delay in the freight vehicle 40. When configured in this way, the server 20 includes a delay determination unit. The delay determination unit causes a delay when the estimated arrival date and time shown in the operation plan exceeds a predetermined threshold value as compared with the estimated arrival date and time calculated by the operation management system 10. Is determined. On the other hand, the delay determination unit determines that no delay has occurred when the difference between the estimated arrival date and time shown in the operation plan and the estimated arrival date and time calculated by the operation management system 10 is equal to or less than the threshold value. When it is determined that the delay has occurred, the server 20 transmits a notification indicating that the delay has occurred to the in-vehicle terminal of the freight vehicle 40. In this case, the server 20 includes the time information indicating how late the vehicle arrives at the destination in the notification and transmits the time information to the in-vehicle terminal of the freight vehicle 40.

The server 20 may be configured to determine whether or not the freight vehicle 40 arrives early. When configured in this way, the server 20 includes an early arrival determination unit. The early arrival determination unit determines that the arrival is early when the estimated arrival date and time shown in the operation plan exceeds the predetermined threshold value and is earlier than the estimated arrival date and time calculated by the operation management system 10. On the other hand, the early arrival determination unit determines that early arrival does not occur when the difference between the estimated arrival date and time shown in the operation plan and the estimated arrival date and time calculated by the operation management system 10 is equal to or less than the threshold value. If it is determined that the vehicle arrives early, the server 20 transmits a notification indicating that the vehicle arrives early to the in-vehicle terminal of the freight vehicle 40. In this case, the server 20 includes the time information indicating how quickly the destination is arrived in the notification and transmits the time information to the in-vehicle terminal of the freight vehicle 40.

<Other variants>
In the transportation of the container of the freight vehicle 40, it is assumed that two or more freight vehicles 40 transport the liquefied gas to the same customer on the same day. The operation in such a case will be described.
When a plurality of freight vehicles 40 arrive at one destination within a predetermined period (for example, 10 minutes, 15 minutes, etc.), the server 20 arrives at the in-vehicle terminals of the plurality of freight vehicles 40. You may notify us to delay. The server 20 may specify the arrival time of each of the plurality of freight vehicles 40.
With this configuration, it is possible to handle even if the destination customer's location is a location where only one freight vehicle 40 can pass. Therefore, convenience can be improved.

Further, when two or more containers are transported by the same freight vehicle 40 on the same day, the server 20 counts the order of the same freight vehicle 40 and mails (normal mail, delayed mail, early mail) based on the order. Control so that incoming mail) is not sent or screen data is not provided.
In addition, the server 20 refers to the operation plan, and when a different freight vehicle 40 arrives at one destination within a predetermined period (for example, 10 minutes, 15 minutes, etc.), the same day and purpose from the operation plan in advance. Extract what is the ground and do one of the following from the information such as each gas type, vehicle number, estimated arrival date and time.
(1): The mail generation unit 34 or the screen providing unit 36 of the customer server 30 generates a list of gas type, estimated arrival date and time, and number of vehicles for the destination on the same day, and for the destination and the freight vehicle 40. Provide information at the same time. If the same gas type has the same estimated arrival date and time, the number of units will be added.
(2): When the mail generation unit 34 or the screen providing unit 36 of the customer server 30 lists the freight vehicles 40 in the same manner as in (1), the freight vehicle 40 that arrives at the destination first, and then the purpose. If the estimated arrival date and time of the freight vehicle 40 arriving at the ground is within the time range exchanged with the customer in advance, the estimated arrival date and time of only the freight vehicle 40 arriving earlier and the gas type for the destination and the freight vehicle 40 And provide at the same time.

The server 20 may be configured to perform the process shown in FIG. 10 in the same manner as the customer server 30. When configured in this way, the server 20 includes a data registration unit, a data storage unit, a mail generation unit, and a mail transmission unit. The specific processing of the data registration unit, the data storage unit, the mail generation unit, and the mail transmission unit is the same as that of the functional unit having the same name provided in the customer server 30. A configuration different from the functional unit having the same name provided in the customer server 30 is that the data registration unit generates a data table by registering data based on the information acquired by the acquisition unit 11. In such a configuration, the customer server 30 does not have to include the mail generation unit 34 and the mail transmission unit 35.
With the above configuration, the server 20 can determine whether or not to send an e-mail, and can send an e-mail according to the determination result.

In the above example, the case where the server 20 or the customer server 30 generates the normal mail, the delayed mail, and the early arrival mail has been described, but the in-vehicle terminal of the freight car 40 is the normal mail, the delayed mail, and the early arrival mail. It may be configured to produce any or all. Hereinafter, a plurality of examples will be shown.

As a first example, a case where the in-vehicle terminal generates a delayed mail or an early arrival mail in response to a notification from the server 20 and sends the generated delayed mail or the early arrival mail to the customer will be described. When configured in this way, the in-vehicle terminal includes a mail generating unit and a mail transmitting unit.
When the mail generation unit of the in-vehicle terminal receives a notification from the server 20 indicating that a delay has occurred or that the user arrives early, the mail generation unit generates a mail corresponding to the received notification. For example, when a notification indicating that a delay has occurred is received, the mail generation unit of the in-vehicle terminal determines that the freight vehicle 40 is delayed and generates a delayed mail. Further, for example, when a notification indicating that the vehicle arrives early is received, the mail generation unit of the in-vehicle terminal determines that the freight vehicle 40 arrives at the destination early and generates an early arrival mail.
The mail sending unit sends the delayed mail or early arrival mail generated by the mail generating unit to the customer. Information about the customer as the transmission destination (for example, address, business office, etc.) may be stored in the in-vehicle terminal or may be included in the notification from the server 20. When configured in this way, the mail generation unit 34 of the customer server 30 may be configured to send only normal mail.

As a second example, the in-vehicle terminal may be configured to perform the process shown in FIG. 10 in the same manner as the customer server 30. When configured in this way, the in-vehicle terminal includes an acquisition unit, a data registration unit, a data storage unit, a mail generation unit, and a mail transmission unit. The specific processing of the acquisition unit, the data registration unit, the data storage unit, the mail generation unit, and the mail transmission unit is the same as the functional unit having the same name provided in the customer server 30. In this configuration, the data linkage unit 23 of the server 20 shares information with the customer server 30 and with the in-vehicle terminal. As a result, the in-vehicle terminal acquires the information shared by the operation management system 10 to the server 20. The data linkage unit 23 of the server 20 may share only information about the freight vehicle 40 including the in-vehicle terminal with the in-vehicle terminal. In such a configuration, the customer server 30 does not have to include the mail generation unit 34 and the mail transmission unit 35.
With the above configuration, it is possible to determine whether or not to send an e-mail on the in-vehicle terminal, and send an e-mail according to the determination result.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and includes designs and the like within a range not deviating from the gist of the present invention.

10 ... Operation management system, 20 ... Server, 30 ... Customer server, 40 ... Freight vehicle, 11 ... Acquisition unit, 12 ... Storage unit, 13 ... Arrival prediction date and time calculation unit, 14 ... Data linkage unit, 21 ... Acquisition unit, 22 ... Storage unit, 23 ... Data linkage unit, 31 ... Acquisition unit, 32 ... Data registration unit, 33 ... Data storage unit, 34 ... Mail generation unit, 35 ... Mail transmission unit, 36 ... Screen provision unit

Claims (6)

A transportation system that transports liquefied gas
A position information acquisition unit that identifies the position information of the freight vehicle based on a plurality of information including at least information on the gas type carried by the freight vehicle.
The arrival prediction date and time calculation unit that calculates the arrival prediction date and time from the current location to the destination specified by the acquired location information, and the arrival prediction date and time calculation unit.
The calculated arrival prediction date and time, the arrival prediction date and time provided in advance to the destination, and the number of times that the arrival prediction date and time information is provided to the destination are stored in the storage unit. The registration unit to be registered in the existing data table and
Information on the estimated arrival date and time using the estimated arrival date and time provided in advance to the destination registered in the data table and the number of times the information on the estimated arrival date and time is provided to the destination. Judgment unit that determines the necessity of provision and
When the determination unit determines that the information needs to be provided, the supply unit that provides the destination with the gas type carried by the freight vehicle and the estimated arrival date and time at the destination.
A transportation system equipped with. When the difference between the estimated arrival date and time calculated by the estimated arrival date and time calculation unit and the estimated arrival date and time provided in advance to the destination exceeds a predetermined threshold value, the freight vehicle The transportation system according to claim 1, which provides information indicating that the vehicle is delayed or arrives early. The providing unit provides the gas type and the estimated arrival date and time in combination when a plurality of freight vehicles carry the same gas type or different gas types to the same destination on the same day. The transportation system according to claim 1 or 2. The transportation system according to any one of claims 1 to 3, wherein the providing unit provides the gas type and the estimated arrival date and time to both the destination and the freight vehicle. The claim that the providing unit provides the calculated arrival estimated date and time as the arrival estimated date and time of the freight vehicle to the destination when the estimated arrival date and time is not provided to the destination in advance. The transportation system according to any one of 1 to 4. It is a method of providing transportation information in a transportation system that transports liquefied gas.
A position information acquisition step for identifying the position information of the freight vehicle based on a plurality of information including at least information on the gas type carried by the freight vehicle, and
The arrival prediction date and time calculation step for calculating the arrival prediction date and time from the current location to the destination specified by the acquired location information, and the arrival prediction date and time calculation step.
The calculated arrival prediction date and time, the arrival prediction date and time provided in advance to the destination, and the number of times that the arrival prediction date and time information is provided to the destination are stored in the storage unit. The registration step to register in the existing data table and
Information on the estimated arrival date and time using the estimated arrival date and time provided in advance to the destination registered in the data table and the number of times the information on the estimated arrival date and time is provided to the destination. Judgment step to determine the necessity of provision and
When it is determined in the determination step that the information needs to be provided, the provision step of providing the gas type carried by the freight vehicle and the estimated arrival date and time at the destination to the destination.
How to provide transportation information.

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