WO2024134869A1

WO2024134869A1 - Data collecting device, terminal device, data collecting system, data collecting method, data transmitting method, and program

Info

Publication number: WO2024134869A1
Application number: PCT/JP2022/047606
Authority: WO
Inventors: 孔貴浅木森
Original assignee: 三菱電機株式会社
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2024-06-27
Also published as: JP7353535B1

Abstract

This data collecting device comprises a setting unit and a meter-read value acquiring unit. The setting unit sets groups of terminal devices from which meter-read value data are to be acquired, and also sets, for each group, a reference timing related to the transmission of the meter-read value data as well as a delay time period relative to the reference timing. The meter-read value acquiring unit acquires the meter-read value data transmitted from the terminal devices at random timings within the delay time period. The delay timing period is updated, for each group, on the basis of the acquisition results of the meter-read value data in the meter-read value acquiring unit. The meter-read value acquiring unit acquires the meter-read value data transmitted from the terminal devices at random timings within the updated delay time period.

Description

Data collection device, terminal device, data collection system, data collection method, data transmission method, and program

The present invention relates to a data collection device, a terminal device, a data collection system, a data collection method, a data transmission method, and a program.

In recent years, terminal devices such as smart meters that automatically read electricity, gas, water, and other usage and transmit the meter readings to a data collection device have become widespread. If multiple terminal devices transmit meter reading data to the data collection device at the same time, congestion can occur, placing a processing load on the data collection device.

A related technology has been disclosed in a communications system for mobile network communications in which terminals are divided into multiple groups, information relating to a predetermined time span is set for each group of terminals, and delay times are calculated within the predetermined time span based on numbers generated by a random number generator, resulting in delay times for each of the multiple terminals.

International Publication No. 2016/157821

However, with conventional technology, even if a specific time interval is set for each group and meter reading data is sent at random times, there is still a problem that congestion may occur if additional terminal devices such as smart meters are installed.

The present invention was made in consideration of these circumstances, and its purpose is to provide technology that can reduce congestion related to the collection of meter reading data.

In order to solve the above-mentioned problems, a data collection device according to one aspect of the present invention is a data collection device that includes a setting unit that sets groups of terminal devices that acquire meter reading data, and that sets, for each group, a reference timing for transmitting meter reading data and a delay period from the reference timing, and a meter reading acquisition unit that acquires meter reading data transmitted from the terminal devices at random timing within the delay period, the delay period being updated for each group based on the results of acquisition of meter reading data by the meter reading acquisition unit, and the meter reading acquisition unit acquiring the meter reading data transmitted from the terminal devices at random timing within the updated delay period.

In order to solve the above-mentioned problems, a terminal device according to another aspect of the present invention is a terminal device that includes a setting information acquisition unit that acquires setting information in which a reference timing for transmitting meter reading data and a delay period from the reference timing are set for each group, and a meter reading value transmission unit that transmits meter reading data to a data collection device at a random timing within the delay period, the delay period being updated for each group based on the acquisition result in the data collection device of the meter reading data transmitted by the meter reading value transmission unit, and the meter reading value transmission unit transmitting the meter reading data to the data collection device at a random timing within the updated delay period.

In order to solve the above-mentioned problems, a data collection system according to another aspect of the present invention is a collection system including a terminal device that acquires meter reading data, and a data collection device that acquires the meter reading data from the terminal device, the data collection device having a setting unit that sets groups of the terminal devices and, for each group, sets a reference timing for transmitting the meter reading data and a delay period from the reference timing, and a meter reading acquisition unit that acquires the meter reading data transmitted from the terminal devices at random timing within the delay period, and the terminal devices have a setting unit that sets the reference timing and the delay period, The data collection system includes a setting information acquisition unit that acquires setting information in which a delay period is set for each group, and a meter reading value transmission unit that transmits meter reading data to the data collection device at random timing within the delay period, the delay period is updated for each group based on the result of acquisition of meter reading data by the meter reading value acquisition unit, the meter reading value transmission unit transmits meter reading data to the data collection device at random timing within the updated delay period, and the meter reading value acquisition unit acquires the meter reading data transmitted from the terminal device at random timing within the updated delay period.

In order to solve the above-mentioned problems, the data collection method according to another aspect of the present invention is a data collection method in which a computer of a data collection device sets groups of terminal devices that acquire meter reading data, and executes a process including a setting step of setting, for each group, a reference timing for transmitting meter reading data and a delay period from the reference timing, and a meter reading acquisition step of acquiring meter reading data transmitted from the terminal device at a random timing within the delay period, the delay period being updated for each group based on the results of acquisition of meter reading data in the meter reading acquisition step, and the meter reading acquisition step acquiring meter reading data transmitted from the terminal device at a random timing within the updated delay period.

In order to solve the above-mentioned problems, the data transmission method according to another aspect of the present invention is a data transmission method in which a computer of a terminal device executes a process including a setting information acquisition step for acquiring setting information in which a reference timing for transmitting meter reading data and a delay period from the reference timing are set for each group, and a meter reading transmission step for transmitting meter reading data to a data collection device at a random timing within the delay period, the delay period being updated for each group based on the acquisition result of the meter reading data transmitted in the meter reading transmission step by the data collection device, and the meter reading transmission step transmitting the meter reading data to the data collection device at a random timing within the updated delay period.

In order to solve the above-mentioned problems, another aspect of the present invention is a program that causes a computer to function as a data collection device, and causes the computer to function as a setting unit that sets groups of terminal devices that acquire meter reading data, and sets, for each group, a reference timing for transmitting meter reading data and a delay period from the reference timing, and a meter reading acquisition unit that acquires meter reading data transmitted from the terminal devices at random timing within the delay period, the delay period being updated for each group based on the results of acquisition of meter reading data by the meter reading acquisition unit, and the meter reading acquisition unit acquiring the meter reading data transmitted from the terminal devices at random timing within the updated delay period.

In order to solve the above-mentioned problems, another aspect of the present invention is a program that causes a computer to function as a terminal device, and causes the computer to function as a setting information acquisition unit that acquires setting information in which a reference timing for transmitting meter reading data and a delay period from the reference timing are set for each group, and a meter reading transmission unit that transmits meter reading data to a data collection device at a random timing within the delay period, the delay period being updated for each group based on the acquisition result in the data collection device of the meter reading data transmitted by the meter reading transmission unit, and the meter reading transmission unit transmitting the meter reading data to the data collection device at a random timing within the updated delay period.

The present invention makes it possible to reduce congestion related to the collection of meter reading data.

1 is a diagram showing a configuration of a data collection system 1 according to an embodiment. FIG. 2 is a diagram showing a functional configuration of a data collection device 100 in the data collection system 1. 13 is a diagram showing an example of a registration/change screen displayed on a user interface unit 210. FIG. FIG. 2 is a diagram showing an example of a group data table 221. FIG. 4 illustrates an example of a setting value data table 222. FIG. 11 is a diagram showing an example of transmission timing for each group based on setting value data. FIG. 13 is a diagram showing an example of a warning displayed on the user interface unit 210. FIG. 2 is a diagram showing the functional configuration of a connection device 101 in the data collection system 1. FIG. 2 is a block diagram showing the hardware configuration of a computer device of each device included in the data collection system 1. 10 is a flowchart showing an example of a registration process of a connection device performed by the data collection device. 10 is a flowchart showing an example of a setting value data receiving process performed by the connected device 101; 10 is a flowchart showing an example of a meter reading value data transmission process performed by a connected device 101. 4 is a flowchart showing an example of a meter reading data receiving process performed by the data collection device 100; 10 is a flowchart showing an example of a setting value data update process performed by the connected device 101. 10 is a flowchart showing an example of a setting value data update process performed by the data collection device 100. 10 is a flowchart showing an example of a maximum width match determination process performed by the data collection device 100.

Below, an embodiment of the present invention will be described with reference to the drawings. The embodiment described below is merely an example, and the embodiment to which the present invention is applicable is not limited to the following embodiment.

(Embodiment)
(Configuration of Data Collection System 1)
Fig. 1 is a diagram showing a configuration of a data collection system 1 according to an embodiment. The data collection system 1 is a system that automatically reads and collects the usage of electricity, gas, water, etc. used in a home or the like. As shown in Fig. 1, the data collection system 1 includes a data collection device 100, smart meters 110 (110a, 110b), a concentrator 120, an IoT (Internet of Things) root terminal 130, and a meter 140. The data collection device 100, the smart meter 110a, and the concentrator 120 are connected to a network 190, and are capable of communicating with each other via a mobile phone network, an optical communication network, or the like.

The data collection device 100 is, for example, a HES (head-end system) server. The data collection device 100 collects meter reading data from each connected device. The data collection device 100 is further connected to a higher-level server, and transmits the collected meter reading data to the higher-level server.

Each connected device connected to the data collection device 100 is classified into groups. The groups are classified, for example, according to the type of connected device or the area in which the connected device is located. For example,

groups

1 and 2 each indicate a classification of multiple smart meters 110a. Group 3 indicates a classification of smart meters 110b placed under the concentrator 120. Group 4 indicates a classification of meters 140 placed under the IoT root terminal 130. Each of groups 1 to 4 is set to transmit meter reading data to the data collection device 100 at a different period.

The smart meter 110a is an electronic power meter that digitally detects power and has a communication function. The smart meter 110a transmits meter reading data directly to the data collection device 100.

The concentrator 120 transmits various data such as meter reading data received from the smart meter 110b under its control to the data collection device 100. Specifically, the concentrator 120 connects to the smart meter 110b under its control. The smart meter 110b is not connected to the network 190, and transmits meter reading data to the concentrator 120 via other smart meters 110b by wireless multi-hop (bucket brigade format). Specifically, each smart meter 110b is equipped with a wireless communication unit, and uses the wireless communication unit as a repeater to sequentially transfer the meter reading data to other smart meters 110b, and finally transmits the meter reading data to the concentrator 120. The concentrator 120 transmits the meter reading data received from the smart meter 110b to the data collection device 100.

The IoT root terminal 130 has a communication function to transmit meter reading data received from the subordinate meters 140 to the data collection device 100 via the smart meter 110a (or concentrator 120). The IoT root terminal 130 connects to the subordinate meters 140. The meters 140 are common meter reading meters or special meter reading meters. Common meter reading meters are meters that are used jointly for multiple meter reading targets such as electricity, gas, and water. Special meter reading meters are meters that meet certain standards but have not been inspected under a specific law (Weights and Measures Act). For example, special meter reading meters are meters that are attached to various facilities such as solar power generation in homes and electric vehicles. For communication between the IoT root terminal 130 and the meters, communication standards such as U-bus and ECHONET Lite (registered trademark) are used. However, the above communication standards are merely examples, and other communication standards may also be used.

In the figure, the smart meter 110b belonging to group 3 is connected to the concentrator 120, and an example is shown in which the meter reading data is transmitted to the data collection device 100 via the concentrator 120, but this is not limited to the above. For example, the smart meter 110b may be connected to the smart meter 110a, and in this case, the smart meter 110b may transmit the meter reading data to the data collection device 100 via the smart meter 110a of the group to which the smart meter 110b belongs.

The same applies to the meter 140. Specifically, in the figure, the meter 140 is connected to the IoT root terminal 130, and an example is shown in which the meter 140 transmits meter reading data to the data collection device 100 via the IoT root terminal 130, but this is not limited to this. For example, the meter 140 may be connected to a smart meter 110a, and in this case, the meter 140 may transmit meter reading data to the data collection device 100 via the smart meter 110a of the group to which the meter 140 belongs.

(Functional configuration of data collection device 100)
Fig. 2 is a diagram showing a functional configuration of the data collection device 100 in the data collection system 1. In Fig. 2, the data collection system 1 includes the data collection device 100 and a connection device 101. The connection device 101 (an example of a terminal device) includes

smart meters

110a and 110b, a concentrator 120, an IoT root terminal 130, and a meter 140.

The data collection device 100 includes a setting unit 201, a setting value notification unit 202, a meter reading data communication unit 203, a setting value acquisition unit 204, a setting value processing unit 205, a maximum width match determination unit 206, a user interface unit 210, a master data storage unit 220, and a meter reading data storage unit 230.

The setting unit 201 sets the group to which the connected device 101 belongs and the setting value data for each group. The setting unit 201 sets the group that the setting reception unit 211 provided in the user interface unit 210 receives from the user. Here, an example of a screen displayed on the user interface unit 210 will be described with reference to FIG. 3.

(Example of a screen displayed on the user interface unit 210)
3 is a diagram showing an example of a registration/change screen displayed on the user interface unit 210. As shown in FIG. 3, a registration/change screen 300 is displayed on the user interface unit 210. The registration/change screen 300 is displayed, for example, by accepting pressing of a predetermined registration start button from the top screen. The registration/change screen 300 includes a connected device type selection button 301, a connected device ID input button 302, an IP address input button 303, a group ID selection button 304, a collection period input button 305, and a setting value data input button 306. Each of the buttons 301 to 306 is an example of the setting reception unit 211.

The connected device type selection button 301 accepts transition to a screen for registering the types of the connected devices 101 (the

smart meters

110a and 110b, the concentrator 120, the IoT root terminal 130, and the meter 140).
A connected device ID input button 302 accepts transition to a screen for inputting a connected device ID, which is identification information of the connected device 101 .
The IP address input button 303 accepts transition to a screen for inputting the IP address of the connected device 101 to be registered.

The group ID selection button 304 switches to a screen for inputting a group ID, which is group identification information of the connected device 101 to be registered.
The collection cycle input button 305 accepts transition to a screen for inputting the collection cycle and reference timing of meter reading data set for each group. The collection cycle and reference timing are not limited to being input by the user, and may be predetermined for each connected device 101. For example, the collection cycle may be preset to a predetermined time such as 15 minutes or 30 minutes depending on the type (group) of the smart meter 110. When the collection cycle and reference timing are preset, the registration/change screen 300 may not display the collection cycle input button 305.

The setting value data input button 306 accepts the input of the collection period (period of transmission of meter reading data) and delay period (upper and lower limits) based on the reference timing set for each group, as well as transition to a screen for inputting the maximum width, which will be described later.

For example, when making a new registration or changing the registered contents, the user presses each of the buttons 301 to 306 in sequence to input the connected device type, connected device ID, IP address, group ID, collection cycle, reference timing, delay period (upper limit and lower limit), and maximum width for the connected device 101 to be registered. This makes it possible to make a new registration of a connected device 101 or change the registered contents. Also, each connected device 101 becomes able to transmit meter reading data to the data collection device 100 at a timing based on a random number within the delay period set for each group.

When the setting unit 201 sets a group, it stores group data indicating the set group in the group data table 221 provided in the master data storage unit 220. Furthermore, when the setting unit 201 sets upper and lower limit values, it stores setting value data indicating the set upper and lower limit values in the setting value data table 222 provided in the master data storage unit 220. Here, the group data table 221 and the setting value data table 222 will be described in detail.

(An example of the group data table 221)
Fig. 4 is a diagram showing an example of the group data table 221. In Fig. 4, the group data table 221 includes the following items: "connected device type", "connected device ID", "connected device IP address", and "group ID".
The “connected device type” indicates any one of the smart meter 110 a, the concentrator 120, and the IoT root terminal 130.
“Connected device ID” indicates a connected device ID that is identification information of the connected device 101 .
“Connected device IP address” indicates the IP address of the connected device 101 .
“Group ID” indicates the group ID that is group identification information of the connected device 101 .

The group data is stored as a record as a result of the user inputting data into each field. As an example, the group data 211a indicates the connected device type of "Smart Meter (Smart Meter 110a)", the connected device ID is "1", and the connected device IP address is "10.11.12.13". It also indicates that the connected device 101 belongs to a group with group ID "1".

(An example of the setting value data table 222)
Fig. 5A is a diagram showing an example of the setting value data table 222. In Fig. 5A, the setting value data table 222 includes the following items: "group ID", "delay period", and "maximum width of delay period".
“Group ID” indicates the group ID that is group identification information of the connected device 101 .
The "delay period" includes a "lower limit", an "upper limit", and a "range".
The "lower limit" indicates the lower limit (minutes) of the delay period based on the collection cycle (the transmission cycle of meter reading data) set for each group.
"Upper limit" indicates the upper limit (minutes) of the delay period based on the collection cycle set for each group. The delay period is the period obtained by subtracting the lower limit from the upper limit. For example, if the upper limit is 10 minutes and the lower limit is 5 minutes, the delay period is "10-5" = 5 minutes.
The "maximum width of the delay period" indicates the maximum length of the delay period that can be updated.
A supplementary explanation regarding the maximum width of the delay period will be provided. When the number of connected terminals in a group increases, the data collection device 100 may be unable to acquire meter reading data from the connected device 101 due to congestion or the like. In this embodiment, therefore, at least one of the "upper limit value" and the "lower limit value" is made updateable (changeable), and the maximum width that can be updated is determined. In this embodiment, the delay period is updated by the connected device 101.

The setting value data is stored as a record as the user inputs data into each item. As an example, the setting value data 222a indicates that for a connected device 101 with a group ID of "1," the lower limit of the delay period is set to 5 minutes, the upper limit to 10 minutes, and the maximum width of the delay period is set to 10 minutes. In other words, the setting value data 222a indicates that for a connected device 101 with a group ID of "1," the delay period is 5 minutes (= 10 minutes - 5 minutes), and that the delay period can be extended to 10 minutes.

(An example of transmission timing based on setting value data)
5B is a diagram showing an example of the transmission timing of each group based on the setting value data. In FIG. 5B, a transmission timing example 500 includes items of "group ID", "collection cycle", "reference timing", and "collection time".
“Group ID” indicates the group ID that is group identification information of the connected device 101 .
The "collection period" indicates the transmission period of the meter reading data set for each group.
"Reference timing" indicates the hourly reference time for transmitting meter reading data that is set for each group.
The "collection time" indicates the time range for each hour of the delay period that is set based on the collection cycle, the reference timing, and the delay period.

As an example, transmission timing example 500a shows that a connected device 101 belonging to a group with a group ID of "1" transmits meter reading data at a timing based on a random number within a 5-minute collection time (range), with the reference timing being 5 minutes and 35 minutes past the hour.

(Regarding notification of setting value data)
The set value notification unit 202 transmits the set value data stored in the set value data table 222 to the connected device 101. When the concentrator 120 and the IoT root terminal 130 included in the connected device 101 receive the set value data, they transmit the set value data to the terminals under them (the smart meter 110b and the meter 140). When each connected device 101 receives the set value data from the set value notification unit 202, it stores the set value data. This allows the connected device 101 to transmit the meter reading data to the data collection device 100 at a timing based on the set value data.

(Regarding acquisition of meter reading data)
The meter reading data communication unit 203 (an example of a meter reading data acquisition unit) acquires meter reading data transmitted from the connected device 101 at a predetermined timing based on the collection cycle, the reference timing, and the delay period (upper limit value and lower limit value). When the meter reading data communication unit 203 acquires the meter reading data, it stores the meter reading data in the meter reading data storage unit 230. Furthermore, when the meter reading data communication unit 203 acquires the meter reading data, it identifies the connected device 101 that transmitted the data, and transmits a response signal to the identified connected device 101. The response signal is a signal indicating that the data collection device 100 has acquired the meter reading data.

(Regarding updating of setting value data)
When the connection device 101 fails to transmit meter reading data to the data collection device 100 due to congestion or the like, the connection device 101 updates the setting value data (upper limit and lower limit) in response to the failure, and transmits the updated setting value data (an example of update information) to the data collection device 100. When the setting value acquisition unit 204 (an example of an update information acquisition unit) acquires the updated setting value data from the connection device 101, it outputs the acquired setting value data to the setting value processing unit 205. The setting value processing unit 205 updates the setting value data stored in the setting value data table 222 based on the setting value data acquired from the setting value acquisition unit 204.

Here, if one connected device 101 in a group fails to send meter reading data, it may be that congestion is occurring in the collection of meter reading data in that group. In other words, it may be that other connected devices 101 in the group may also fail to send meter reading data. Therefore, in this embodiment, when one connected device 101 in a group updates its setting value data, the other connected devices 101 in the same group also update their setting value data. This will be described in detail below.

When the setting value acquisition unit 204 acquires the updated setting value data, the setting value processing unit 205 identifies the group to which the connected device 101 that transmitted the setting value belongs. The setting value processing unit 205 also updates the setting value data stored in the setting value data table 222 for the other connected devices 101 that belong to the identified group.

In addition, the setting value notification unit 202 (an example of an update information transmission unit) transmits the updated setting value data to the other connected devices 101 that belong to the group identified by the setting value processing unit 205. When the other connected devices 101 receive the updated setting value data from the setting value notification unit 202, they store the setting value data. As a result, the other connected devices 101 update their own setting value data when one connected device 101 in the same group updates its setting value data. Therefore, from then on, the connected devices 101 will transmit meter reading data to the data collection device 100 at a timing based on the updated setting value data.

(About maximum width match judgment)
In this embodiment, the setting value data (upper limit and lower limit) are updated by the connected device 101 as appropriate. In this embodiment, when the width (delay period) of the updated setting value data becomes the maximum width of the delay period, the setting value data cannot be updated any further. For this reason, the data collection device 100 periodically performs the following maximum width match determination and issues a warning depending on the determination result.

The maximum width match determination unit 206 periodically performs a maximum width match determination to determine whether or not the width (delay period) between the upper and lower limit values matches the maximum width of the delay period, by referring to the setting value data stored in the setting value data table 222. If the maximum width match determination unit 206 determines that there is a match in the maximum width match determination, it outputs the determination result to the warning notification unit 212. When the warning notification unit 212 (an example of a notification unit) obtains the determination result from the maximum width match determination unit 206, it issues a warning. Here, an example of a warning displayed on the user interface unit 210 will be described.

(Warning displayed on the user interface unit 210)
FIG. 6 is a diagram showing an example of a warning displayed on the user interface unit 210. As shown in FIG. 6, a warning screen 600 is displayed on the user interface unit 210. The warning screen 600 includes a notification time and a group ID. The notification time is the time when a positive determination result is obtained in the maximum width match determination, and includes, for example, a date and a time in seconds. This allows the user to display the registration/change screen 300 (FIG. 3) on the user interface unit 210 and reset the maximum width or re-register the group. The warning screen 600 may display, for example, a message urging the user to change the maximum width setting or to re-register the group.

(Functional configuration of connection device 101)
Fig. 7 is a diagram showing a functional configuration of the connection device 101 in the data collection system 1. In Fig. 7, the connection device 101 includes a setting value acquisition unit 701, a periodic meter reading value processing unit 702, a periodic meter reading value communication unit 703, a setting value update unit 704, a setting value transmission unit 705, a setting value data storage unit 710, a meter reading value data storage unit 720, and a transmission history data storage unit 730.

The setting value acquisition unit 701 (an example of a setting information acquisition unit) acquires setting value data transmitted from the data collection device 100. The setting value data acquired by the setting value acquisition unit 701 includes setting value data for new registrations and updated setting value data (update information). When the setting value acquisition unit 701 acquires the setting value data, it stores the setting value data in the setting value data storage unit 710.

The meter reading data storage unit 720 stores the meter reading data sequentially acquired by the connected device 101. The periodic meter reading data processing unit 702 acquires meter reading data from the meter reading data storage unit 720 at random timing within the delay period indicated by the setting value data stored in the setting value data storage unit 710, and outputs it to the periodic meter reading data communication unit 703. Specifically, the periodic meter reading data processing unit 702 generates a random number each time the reference timing is reached, acquires meter reading data at random timing within the delay period, and outputs it to the periodic meter reading data communication unit 703. This allows the periodic meter reading data communication unit 703 (an example of a meter reading data transmission unit) to transmit meter reading data to the data collection device 100 at random timing within the delay period each time.

(About updating the setting values)
When the periodic meter reading value communication unit 703 transmits the meter reading value data, it receives a response signal from the data collection device 100 within a predetermined period of time, indicating that the meter reading value data has been acquired. When the periodic meter reading value communication unit 703 receives a response signal within the predetermined period of time, it stores a transmission history indicating successful transmission in the transmission history data storage unit 730. On the other hand, when the periodic meter reading value communication unit 703 does not receive a response signal within the predetermined period of time, it stores a transmission history indicating unsuccessful transmission in the transmission history data storage unit 730. The transmission history is an example of the result of acquisition of meter reading value data in the data collection device 100.

The setting value update unit 704 (an example of an update unit) updates the setting value data stored in the setting value data storage unit 710 based on the transmission history stored in the transmission history data storage unit 730. For example, the setting value update unit 704 updates the setting value data (upper limit and lower limit) within the maximum range when a predetermined condition is met. The predetermined condition is, for example, a condition based on the rate of failed transmissions, and more specifically, a condition that the rate of failed transmissions out of a predetermined number of most recent times is equal to or greater than a threshold. Note that the predetermined condition is not limited to being based on the rate of failed transmissions, but may also be based on the number of failed transmissions. For example, the predetermined condition may be a condition that a predetermined number of consecutive transmissions have failed in the most recent time.

The setting value update unit 704 updates at least one of the upper limit value and the lower limit value for a predetermined period within the maximum width range, for example. Specifically, for example, the setting value update unit 704 updates the lower limit value to "-y minutes" and the upper limit value to "+x minutes". As a result, the delay period is extended by "x+y minutes" within the maximum width range.

For example, the setting value update unit 704 gradually updates the delay period up to the maximum width (10 minutes). Specifically, the setting value update unit 704 can extend the delay period by 2 minutes by changing "-y minutes" to "-1 minute" and "+x minutes" to "+1 minute." In this way, gradually updating the delay period up to the maximum width makes it more difficult to issue a warning. This reduces the burden on the work staff involved in changing the maximum width.

The setting value update unit 704 may update the maximum width (10 minutes) in one update. Specifically, the setting value update unit 704 may change "-y minutes" to "-5 minutes" and "+x minutes" to "+5 minutes." This makes it easier to issue a warning, making it more difficult for congestion to occur.

When the setting value update unit 704 updates the setting value data, it outputs the updated setting value data to the setting value transmission unit 705. When the setting value transmission unit 705 (an example of an update information transmission unit) obtains the updated setting value data from the setting value update unit 704, it transmits the setting value data to the data collection device 100. This enables the data collection device 100 to update the setting value data stored in the setting value data table 222 for the connected device 101, and to transmit the updated setting value data to other connected devices 101 in the group to which the connected device 101 belongs.

(Configuration of each computer device)
8 is a block diagram showing the hardware configuration of the computer device of each device included in the data collection system 1. A computer 800 is implemented in each of the data collection device 100 and the connection device 101.

In FIG. 8, the computer 800 includes a CPU (Central Processing Unit) 801, memory 802, a communication I/F (interface) 803, an input device 804, and an output device 805.

The CPU 801 is responsible for the overall control of the computer 800 .
The memory 802 includes various storage media such as a ROM (Read Only Memory) and a RAM (Random Access Memory). The ROM stores various programs. For example, the ROM of the computer 800 implemented in the data collection device 100 stores the data collection program according to this embodiment. The ROM of the computer 800 implemented in the connection device 101 stores the data transmission program according to this embodiment. The RAM is used as a work area for the CPU 801. The memory 802 includes a magnetic disk, a magneto-optical disk, an optical disk, and a semiconductor memory. The memory 802 may be an internal medium directly connected to the bus of the computer 800, or an external medium connected to the computer 800 via an interface such as the communication I/F 803. In addition, when a program is distributed to the computer 800 by the communication I/F 803, the computer 800 that has received the program may expand the program in the memory 802 and execute the process.

The communication I/F 803 is connected to the network 190 via a communication line, and is connected to other devices and equipment via the network 190 .
The input device 804 is used to input characters, numbers, various instructions, etc. In the case of the data collection device 100, the input device 804 includes a touch panel type input pad, operation buttons, a keyboard, a mouse, a microphone, etc.
The output device 805 includes a display for displaying images and a speaker for outputting sound.

Next, the processing performed by the data collection device 100 and the connected device 101 will be explained using Figures 9 to 15.

(Registration process performed by data collection device 100)
Fig. 9 is a flow chart showing an example of the registration process of the connected device 101 performed by the data collection device 100. In Fig. 9, the setting unit 201 determines whether or not the registration of the connected device 101 is to be started for new registration or change registration by accepting pressing of a predetermined registration start button from the top screen (step S901). The setting unit 201 waits until registration starts (step S901: NO). When registration starts (step S901: YES), the setting unit 201 displays the registration/change screen 300 (Fig. 3) (step S902).

Then, the setting reception unit 211 receives input of various information about the connected device 101 related to the new registration or change registration (step S903). The various information includes, for example, the type, connected device ID, IP address, group ID, collection period, reference timing, upper limit value, and lower limit value for the target connected device 101. Next, the setting unit 201 stores the group data and setting value data based on the input received in step S903 in the group data table 221 and setting value data table 222, respectively (step S904). Then, the setting value notification unit 202 transmits the setting value data to the connected device 101 (step S905), and the series of processes ends.

(Setting Value Data Reception Process Performed by the Connected Device 101)
Fig. 10 is a flow chart showing an example of a setting value data receiving process performed by the connected device 101. In Fig. 10, the setting value acquisition unit 701 judges whether or not setting value data has been received (step S1001). The setting value data here includes setting value data related to new registration or change registration. The setting value acquisition unit 701 waits until receiving setting value data (step S1001: NO). When receiving setting value data (step S1001: YES), the setting value acquisition unit 701 stores the received setting value data in the setting value data storage unit 710 (step S1002), and ends the series of processes.

(Meter reading data transmission process performed by the connected device 101)
11 is a flowchart showing an example of the transmission process of the meter reading data performed by the connection device 101. In FIG. 11, the periodic meter reading value processing unit 702 judges whether or not the reference timing has arrived (step S1101). The periodic meter reading value processing unit 702 waits until the reference timing arrives (step S1101: NO), and when the reference timing arrives (step S1101: YES), acquires the set value data (upper limit value and lower limit value) stored in the set value data storage unit 710 (step S1102). Then, the periodic meter reading value processing unit 702 determines the transmission timing based on the random number value within the delay period (the width of the upper limit value and the lower limit value) (step S1103).

Then, the periodic meter reading value processing unit 702 judges whether the transmission timing has arrived (step S1104). The periodic meter reading value processing unit 702 waits until the transmission timing arrives (step S1104: NO), and when the transmission timing arrives (step S1104: YES), it acquires the meter reading value data stored in the meter reading value data storage unit 720 (step S1105). Then, the periodic meter reading value communication unit 703 transmits the meter reading value data to the data collection device 100 (step S1106).

Next, the periodic meter reading value communication unit 703 determines whether or not a response signal to the transmission of the meter reading value data has been received from the data collection device 100 (step S1107). If a response signal has been received (step S1107: YES), the periodic meter reading value communication unit 703 proceeds to step S1110. On the other hand, if a response signal has not been received (step S1107: NO), the periodic meter reading value communication unit 703 determines whether or not a certain period of time has elapsed (step S1108).

If the fixed time has not elapsed (step S1108: NO), the periodic meter reading value communication unit 703 returns to step S1107. If the fixed time has elapsed (step S1108: YES), the periodic meter reading value communication unit 703 adds "1" to the number of transmission failures (step S1109). Then, the periodic meter reading value communication unit 703 stores the transmission history data in the transmission history data storage unit 730 (step S1110), and ends the series of processes.

(Meter reading data reception process performed by the data collection device 100)
Fig. 12 is a flowchart showing an example of a meter reading data reception process performed by the data collection device 100. In Fig. 12, the meter reading data communication unit 203 judges whether or not the meter reading data has been received (step S1201). The meter reading data communication unit 203 waits until the meter reading data is received (step S1201: NO), and when the meter reading data is received (step S1201: YES), the meter reading data communication unit 203 stores the meter reading data in the meter reading data storage unit 230 (step S1202).

Then, the meter reading data communication unit 203 identifies the connected device 101 that is the sender (step S1203), transmits a response signal to the identified connected device 101 (step S1204), and ends the series of processes.

(Setting Value Data Update Process Performed by the Connected Device 101)
Fig. 13 is a flowchart showing an example of a setting value data update process performed by the connected device 101. In Fig. 13, the setting value update unit 704 judges whether a certain time related to the update of the setting value data has elapsed (step S1301). The setting value update unit 704 waits until the certain time has elapsed (step S1301: NO). When the certain time has elapsed (step S1301: YES), the setting value update unit 704 acquires the setting value data (upper limit value and lower limit value) stored in the setting value data storage unit 710 (step S1302).

Then, the setting value update unit 704 judges whether the value (delay period) obtained by subtracting the lower limit value from the upper limit value is equal to or less than the maximum width (step S1303). If it is judged that the delay period is equal to or less than the maximum width (step S1303: YES), the setting value update unit 704 ends the series of processes. On the other hand, if the delay period is not equal to or less than the maximum width (step S1303: NO), that is, if the delay period is less than the maximum width, the setting value update unit 704 obtains the most recent n transmission history data from the transmission history data storage unit 730 (step S1304).

Then, the setting value update unit 704 extracts the number of failures from the acquired transmission history data for the most recent n times, and determines whether the extracted number of failures is equal to or greater than a threshold value (step S1305). If the number of failures is not equal to or greater than the threshold value (step S1305: NO), that is, if the number of failures is less than the threshold value, the setting value update unit 704 ends the series of processes.

On the other hand, if the number of failures is equal to or greater than the threshold (step S1305: YES), the setting value update unit 704 updates the upper limit (e.g., "+x minutes") of the setting value data stored in the setting value data storage unit 710 (step S1306) and updates the lower limit (e.g., "-y minutes") (step S1307). The setting value transmission unit 705 then transmits the setting value data updated by the setting value update unit 704 to the data collection device 100 (step S1308), and the series of processes ends.

(Meter Reading Data Update Process Performed by Data Collection Device 100)
Fig. 14 is a flowchart showing an example of a setting value data update process performed by the data collection device 100. In Fig. 14, the setting value acquisition unit 204 determines whether or not it has received setting value data updated by the connected device 101 (step S1401). The setting value acquisition unit 204 waits until it receives the setting value data (step S1401: NO).

When the setting value acquisition unit 204 receives the setting value data (step S1401: YES), the setting value processing unit 205 refers to the group data table 221 and identifies the group to which the connected device 101 that sent the data belongs (step S1402). The setting value processing unit 205 then updates the setting value data of the identified group (step S1403). Next, the setting value processing unit 205 searches for connected devices 101 that belong to the identified group (step S1404).

Then, the setting value notification unit 202 transmits the setting value data to all of the connected devices 101 found by the setting value processing unit 205 (step S1405), and ends the series of processes. Note that, upon receiving the setting value data, the connected device 101 performs the reception process shown in FIG. 10 to store the received setting value data in the setting value data storage unit 710.

(Maximum width match determination process performed by the data collection device 100)
Fig. 15 is a flowchart showing an example of a maximum width match determination process performed by the data collection device 100. In Fig. 15, the maximum width match determination unit 206 determines whether a certain time for performing a maximum width match determination has elapsed (step S1501). The maximum width match determination unit 206 waits until the certain time has elapsed (step S1501: NO). When the certain time has elapsed (step S1501: YES), the maximum width match determination unit 206 sets the group ID of the determination target to "1" (step S1502).

Then, the maximum width matching determination unit 206 refers to the setting value data table 222 and obtains the setting value data corresponding to the set group ID (step S1503). The maximum width matching determination unit 206 then determines whether the width (delay period) obtained by subtracting the lower limit value from the upper limit value is less than the maximum width (step S1504). If the delay period is less than the maximum width (step S1504: YES), the maximum width matching determination unit 206 proceeds to step S1506. On the other hand, if the delay period is not less than the maximum width (step S1504: NO), specifically, if the delay period and the maximum value match, the warning notification unit 212 issues a warning (step S1505).

Next, the maximum width matching determination unit 206 determines whether the group ID is the maximum value (group IDmax) of the registered group IDs (step S1506). If the group ID is not group IDmax (step S1506: NO), the maximum width matching determination unit 206 adds "1" to the group ID (step S1507). Thereafter, the process proceeds to step S1503, where the maximum width matching determination unit 206 performs a maximum width matching determination for the next group. On the other hand, if the group ID is group IDmax (step S1506: YES), that is, if the maximum width matching determination has been completed for all groups, the process ends.

(Effects of the embodiment)
As described above, the data collection device 100 according to the present embodiment collects meter reading data transmitted from the terminal devices at random timing within the delay period updated for each group based on the acquisition result of the meter reading data. As a result, even if the

smart meters

110a and 110b or the meter 140 are added, the delay period can be updated based on the collection result of the meter reading data, so that the transmission timing from the connected device 101 can be appropriately distributed. Therefore, according to the present embodiment, congestion related to the collection of the meter reading data can be suppressed.

Furthermore, in the data collection device 100 according to this embodiment, the delay period can be updated up to a maximum period that is set in advance for each group. In this way, by setting a maximum period, it is possible to collect meter reading data within the range of the maximum period assigned to each group. If a maximum period were not set, there would be a risk that the timing of meter reading data transmission would overlap between groups, which could cause congestion. According to this embodiment, congestion related to the collection of meter reading data for each group can be effectively suppressed.

In addition, the data collection device 100 according to this embodiment notifies the user when the delay period has been updated to the maximum period. This makes it possible to prompt the user to change the maximum period. In addition, changing the maximum period can prevent congestion from occurring.

In addition, when the data collection device 100 according to this embodiment acquires setting value data for one connected device 101 in a group, it updates all setting value data in the group based on the acquired setting value data. This makes it possible to reduce failures in the transmission of meter reading data not only for that one connected device 101, but also for other connected devices 101 in the group. In other words, congestion in the group can be prevented.

In addition, the connected devices 101 according to this embodiment transmit meter reading data to the data collection device 100 at random timing for each group within a delay period that is updated for each group based on the transmission history data of the meter reading data. As a result, even if

smart meters

110a, 110b or meters 140 are added, the delay period can be updated based on the meter reading data collection results, so that the transmission timing from the connected devices 101 can be appropriately distributed. Therefore, according to this embodiment, congestion in the transmission of meter reading data can be suppressed.

Furthermore, in the connected device 101 according to this embodiment, the delay period can be updated up to a maximum period that is set in advance for each group. In this way, by setting a maximum period, it is possible to transmit meter reading data within the range of the maximum period assigned to each group. If a maximum period were not set, there would be a risk that the timing of transmitting meter reading data would overlap between groups, which could cause congestion. According to this embodiment, congestion related to the transmission of meter reading data for each group can be effectively suppressed.

In addition, the connected device 101 according to this embodiment updates the delay period based on the transmission history data, and transmits setting value data indicating the updated delay period to the data collection device 100. This allows each connected device 101 to update the delay period by itself. Furthermore, since the data collection device 100 only needs to update the setting value data in the setting value data table 222, it is possible to suppress processing overload in the data collection device 100 in relation to updating the delay period.

(Modification of the embodiment)
Next, modified examples of the embodiment will be described. In the following modified examples, the contents described in the above-mentioned embodiment will be omitted as appropriate. The modified examples described below and the above-mentioned embodiment can be combined as appropriate.

(Variation 1)
In the above-described embodiment, an example has been described in which the setting value data is updated by the connected device 101 (the setting value update unit 704). Instead of or in addition to such an example, in Modification 1, an example will be described in which the setting value data is updated by the data collection device 100.

In the first modification, the meter reading data communication unit 203 (FIG. 2) of the data collection device 100 manages the delay period for each group. For example, the meter reading data communication unit 203 determines for each group whether or not meter reading data is received from each connected device 101 within the delay period. If the meter reading data communication unit 203 receives meter reading data within the delay period, it stores a reception history indicating successful reception for the connected device 101 that transmitted the data in the meter reading data storage unit 230. On the other hand, if the regular meter reading data communication unit 703 does not receive meter reading data within the delay period, it stores a reception history indicating unsuccessful reception for the connected device 101 that transmitted the data in the meter reading data storage unit 230.

The setting value processing unit 205 extracts each connected device 101 for each group each time a certain period of time related to updating the setting value data has elapsed. Then, for each extracted connected device 101, the setting value processing unit 205 extracts the number of failures from the most recent n reception history data on the condition that the delay period (upper limit and lower limit) is equal to or less than the maximum width. Furthermore, the setting value processing unit 205 determines whether the extracted number of failures is equal to or greater than a threshold value. If the number of failures is equal to or greater than the threshold value, the setting value processing unit 205 updates the delay period of the connected device 101.

When the delay period is updated by the setting value processing unit 205, the setting value notification unit 202 transmits the updated setting value data to all connected devices 101 in the group to which the connected device 101 that was the subject of the update belongs. As a result, when all connected devices 101 in the group receive the updated setting value data, the setting value data can be stored in the setting value data storage unit 710. Even in this way, the connected devices 101 can thereafter transmit meter reading data to the data collection device 100 at a timing based on the updated setting value data.

As described above, the data collection device 100 according to the first modification updates the delay period for each group based on the reception history (acquisition results) of the meter reading data. This allows the data collection device 100 to collectively update the delay period for each connected device 101. Therefore, according to the first modification, the transmission timing from the connected devices 101 can be appropriately distributed, thereby reducing congestion related to the collection of meter reading data.

(Variation 2)
In the above-described embodiment, an example has been described in which the setting unit 201 manually generates the group data table 221 and the setting value data table 222 through input by the user. Instead of or in addition to such an example, in Modification 2, an example will be described in which the setting unit 201 automatically generates at least one of the group data table 221 and the setting value data table 222. Note that, hereinafter, an example will be described in which both the group data table 221 and the setting value data table 222 are automatically generated.

In the second modification, the setting unit 201 acquires information such as the connected device type, connected device ID, and IP address from each connected device 101, and inputs the acquired information into the group data table 221. The setting unit 201 also acquires location information from the connected devices 101, and determines a group (group ID) based on the location information. Specifically, the setting unit 201 determines connected devices 101 located within a specified area as belonging to the same group. The setting unit 201 then inputs the determined group ID into the group data table 221. This makes it possible to automatically generate the group data table 221.

The setting unit 201 also inputs the delay period (upper and lower limits) and maximum width values into the setting value data table 222 based on the acquired type of connected device 101 and the set group. For example, the data collection device 100 stores in advance in a specified storage unit a table that associates the type of connected device 101, the number of connected devices belonging to a group, and each value (delay period and maximum width). The setting unit 201 refers to the table to identify each value based on the type of connected device 101 and the number of connected devices, and inputs each identified value into the setting value data table 222.

According to variant example 2, it is possible to reduce the user's workload in generating the group data table 221 and the setting value data table 222.

Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. These embodiments and their modifications are within the scope of the invention and its equivalents as set forth in the claims, as well as the scope and gist of the invention.

The programs for implementing the data collection system 1, data collection device 100, and connection device 101 described above may be recorded on a computer-readable recording medium, and the programs may be read into a computer system for execution. The term "computer system" as used herein includes hardware such as an OS and peripheral devices. The term "computer-readable recording medium" refers to portable media such as USB (Universal Serial Bus) flash memory, SSD (Solid State Drive), flexible disk, optical magnetic disk, ROM, and CD-ROM, and storage devices such as hard disks built into a computer system. The term "computer-readable recording medium" also includes devices that hold a program for a certain period of time, such as volatile memory (RAM) inside a computer system that becomes a server or client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. The above-mentioned program may be transmitted from a computer system that stores the program in a storage device, etc., to another computer system via a transmission medium, or by transmission waves in the transmission medium. Here, the "transmission medium" that transmits the program refers to a medium that has the function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The above program may also be one that realizes part of the above-mentioned functions. Furthermore, it may be one that can realize the above-mentioned functions in combination with a program already recorded in the computer system, a so-called differential file (differential program).

1...Data collection system, 100...Data collection device, 101...Connected device, 110, 110a, 110b...Smart meter, 120...Concentrator, 130...IoT root terminal, 140...Meter, 201...Setting unit, 202...Setting value notification unit, 203...Meter reading data communication unit, 204...Setting value acquisition unit, 205...Setting value processing unit, 206...Maximum width match determination unit, 210...User interface unit, 220...Master data storage unit, 221...Group data table, 222...Setting value data table, 230...Meter reading data storage unit, 701...Setting value acquisition unit, 702...Periodic meter reading processing unit, 703...Periodic meter reading communication unit, 704...Setting value update unit, 705...Setting value transmission unit, 710...Setting value data storage unit, 720...Meter reading data storage unit, 730...Transmission history data storage unit

Claims

A setting unit that sets a group of terminal devices that acquire meter reading data, and sets a reference timing for transmitting the meter reading data and a delay period from the reference timing for each group;
a meter reading acquisition unit that acquires meter reading data transmitted from the terminal device at random timing within the delay period;
Equipped with
The delay period is updated for each group based on the acquisition result of the meter reading data by the meter reading value acquisition unit,
The meter reading value acquisition unit acquires the meter reading value data transmitted from the terminal device at random timing within the updated delay period.
Data collection equipment.
The delay period can be updated up to a maximum period preset for each group.
The data collection device of claim 1 .
a notification unit that notifies the user when the delay period is updated to the maximum period;
The data collection device of claim 2.
an update information acquisition unit that acquires update information indicating the delay period updated in one terminal device in the group;
an update information transmission unit that transmits the update information acquired by the update information acquisition unit to other terminal devices in a group to which the one terminal device belongs;
Equipped with
The data collection device according to any one of claims 1 to 3.
A setting information acquisition unit that acquires setting information in which a reference timing for transmitting meter reading data and a delay period from the reference timing are set for each group;
a meter reading transmission unit that transmits the meter reading data to the data collection device at random timing within the delay period;
Equipped with
The delay period is updated for each group based on an acquisition result of the meter reading data transmitted by the meter reading transmission unit in the data collection device,
The meter reading value transmission unit transmits the meter reading value data to the data collection device at random timing within the updated delay period.
Terminal device.
The delay period can be updated within a range up to a maximum period preset for each group.
The terminal device according to claim 5.
an update unit that updates the delay period based on the acquired result;
an update information transmission unit that transmits update information indicating the delay period updated by the update unit to the data collection device;
Equipped with
The terminal device according to claim 6.
A collection system including a terminal device that acquires meter reading data and a data collection device that acquires the meter reading data from the terminal device,
The data collection device includes:
A setting unit that sets a group of the terminal devices and sets a reference timing for transmitting meter reading data and a delay period from the reference timing for each group;
a meter reading acquisition unit that acquires meter reading data transmitted from the terminal device at random timing within the delay period;
Equipped with
The terminal device
a setting information acquisition unit that acquires setting information in which the reference timing and the delay period are set for each group;
a meter reading transmission unit that transmits meter reading data to the data collection device at random timing within the delay period;
Equipped with
The delay period is updated for each group based on the acquisition result of the meter reading data by the meter reading value acquisition unit,
The meter reading transmission unit transmits the meter reading data to the data collection device at random timing within the updated delay period,
The meter reading value acquisition unit acquires the meter reading value data transmitted from the terminal device at random timing within the updated delay period.
Data collection system.
The computer of the data collection device
A setting step of setting a group of terminal devices that acquires meter reading data, and setting a reference timing for transmitting the meter reading data and a delay period from the reference timing for each group;
a meter reading acquisition step of acquiring meter reading data transmitted from the terminal device at random timing within the delay period;
Perform a process including
The delay period is updated for each group based on the result of acquisition of the meter reading data in the meter reading acquisition step;
In the meter reading value acquisition step, meter reading value data transmitted from the terminal device is acquired at random timing within the updated delay period.
Data collection methods.
The terminal device computer
A setting information acquisition step of acquiring setting information in which a reference timing for transmitting meter reading data and a delay period from the reference timing are set for each group;
a meter reading transmission step of transmitting meter reading data to a data collection device at random timing within the delay period;
Perform a process including
The delay period is updated for each group based on the acquisition result of the meter reading data transmitted in the meter reading transmission step by the data collection device,
In the meter reading data transmission step, the meter reading data is transmitted to the data collection device at random timing within the updated delay period.
Data transmission method.
A program for causing a computer to function as a data collection device,
The computer,
a setting unit that sets a group of terminal devices that acquires the meter reading data, and sets, for each group, a reference timing for transmitting the meter reading data and a delay period from the reference timing;
a meter reading acquisition unit that acquires meter reading data transmitted from the terminal device at random timing within the delay period;
Function as a
The delay period is updated for each group based on the acquisition result of the meter reading data by the meter reading value acquisition unit,
The meter reading value acquisition unit acquires the meter reading value data transmitted from the terminal device at random timing within the updated delay period.
program.
A program for causing a computer to function as a terminal device,
The computer,
A setting information acquisition unit that acquires setting information in which a reference timing for transmitting meter reading data and a delay period from the reference timing are set for each group;
a meter reading transmission unit that transmits the meter reading data to the data collection device at random timing within the delay period;
Function as a
The delay period is updated for each group based on an acquisition result of the meter reading data transmitted by the meter reading transmission unit in the data collection device,
The meter reading value transmission unit transmits the meter reading value data to the data collection device at random timing within the updated delay period.
program.