WO2014175233A1 - 端末制御システム - Google Patents
端末制御システム Download PDFInfo
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- WO2014175233A1 WO2014175233A1 PCT/JP2014/061212 JP2014061212W WO2014175233A1 WO 2014175233 A1 WO2014175233 A1 WO 2014175233A1 JP 2014061212 W JP2014061212 W JP 2014061212W WO 2014175233 A1 WO2014175233 A1 WO 2014175233A1
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- measurement
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
- H04L67/143—Termination or inactivation of sessions, e.g. event-controlled end of session
- H04L67/145—Termination or inactivation of sessions, e.g. event-controlled end of session avoiding end of session, e.g. keep-alive, heartbeats, resumption message or wake-up for inactive or interrupted session
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/80—Arrangements in the sub-station, i.e. sensing device
- H04Q2209/84—Measuring functions
- H04Q2209/845—Measuring functions where the measuring is synchronized between sensing devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/80—Arrangements in the sub-station, i.e. sensing device
- H04Q2209/88—Providing power supply at the sub-station
- H04Q2209/883—Providing power supply at the sub-station where the sensing device enters an active or inactive mode
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to a terminal control system that controls a terminal.
- some conventional wireless terminal devices receive a beacon addressed to a group to which they belong by canceling the sleep state at the start timing of the group to which they belong (for example, see Patent Document 2).
- the activation timing of each terminal is not set in consideration of the communication time of other terminals. For this reason, it is difficult to say that the activation timings of all terminals are sufficiently optimized.
- a wireless communication terminal driven by a battery needs to be activated efficiently with low power consumption.
- the conventional measurement system or wireless terminal device has room for power saving of the entire terminal.
- the problem to be solved by the present invention is to optimize the start timing of each terminal in consideration of the communication time of other terminals, and to save power of the terminals.
- the terminal control system of the present invention provides: A terminal control system including a plurality of terminal devices and a control device that controls the plurality of terminal devices, The terminal device After a lapse of a reference time that becomes a reference when the plurality of terminal devices perform predetermined terminal processing in the same period, the terminal device starts at a preset start time, As the terminal processing, after the activation time elapses, the data transmission preparation is completed until the preset offset time elapses from the reference time, and the preset communication time elapses after the offset time elapses.
- the controller is Based on the communication time, calculate an offset time for another terminal device that executes the terminal processing following the terminal device, The another terminal device is: The activation time determined based on the calculated offset time is set as the next activation time.
- FIG. It is a figure which shows the example of the whole structure of the terminal control system. It is a figure which shows an example of the functional block diagram of the terminal control system. It is a figure which shows an example of the hardware constitutions which implement
- FIG. It is a figure which shows an example of the flowchart of the initial setting process in the terminal control system. It is a figure which shows an example of the offset time management data 443. It is a figure which shows typically an example in the case of calculating the starting time of the terminal device 3.
- FIG. It is a figure which shows an example of the measurement period data and offset time data which are recorded on EEPROM56 of the terminal device 3 which belongs to the group 1.
- FIG. It is a figure which shows an example of the measurement period data and offset time data which are recorded on EEPROM56 of the terminal device 3 which belongs to the group 2.
- FIG. It is a figure which shows an example of the measurement period data and offset time data which are recorded on EEPROM56 of the terminal device 3 which belongs to the group 3.
- FIG. 1 It is a figure which shows an example of the measurement data transmitted to the terminal control apparatus 2 from the terminal device 3. It is a figure which shows the example of the whole structure of the terminal control system. It is a figure which shows an example of the functional block diagram of the terminal control system. It is a figure which shows an example of the flowchart of the initial setting process in the terminal control system. It is a figure which shows an example of the offset time management data 443. It is a figure which shows an example of the measurement period data and offset time data which are recorded on EEPROM56 of the terminal device 3 which belongs to the group 1. FIG. It is a figure which shows an example of the measurement period data and offset time data which are recorded on EEPROM56 of the terminal device 3 which belongs to the group 2. FIG.
- FIG. 1 is a diagram showing an example of the overall configuration of a terminal control system 1 according to the first embodiment of the present invention.
- the terminal control system 1 includes, for example, one terminal control device 2, a plurality of terminal devices 3, and a plurality of relay devices 4.
- the terminal control device 2 and the repeater 4 both have a wireless communication function and can wirelessly communicate with each other.
- the terminal device 3 and the relay device 4 both have a wireless communication function and can perform wireless communication with each other.
- the terminal control device 2, the terminal device 3, and the relay device 4 are connected using lines for the sake of explanation. However, when a wireless communication function is provided, no connection line is necessary. .
- the terminal device 3 is activated, for example, at a preset activation time, measures the operating state of the steam trap installed in the steam piping facility, and sends the measurement data to the terminal control device 2.
- the activation of the terminal device 3 may be referred to as “wake-up”.
- the terminal device 3 forms a group by one or more terminal devices 3.
- group 1 is formed from four terminal devices 3
- group 2 is formed from two terminal devices 3
- group 3 is formed from three terminal devices 3.
- the terminal control device 2 determines, for example, the activation schedule of each terminal device 3 and sets data necessary for this in each terminal device 3. Moreover, the terminal control apparatus 2 receives measurement data from the terminal apparatus 3, for example.
- the relay device 4 operates as a repeater that relays communication data between the terminal control device 2 and the terminal device 3, for example.
- FIG. 2 is a diagram illustrating an example of a functional block diagram of the terminal control system 1.
- the terminal control device 2 includes a communication time calculation unit 21 that calculates a communication time, an offset time calculation unit 22 that calculates an offset time, an offset time management unit 23 that manages the calculated offset time, and a measurement that manages a measurement cycle.
- a cycle management unit 24 and a measurement data storage unit 25 that records the received measurement data are provided.
- the communication time calculation unit 21 can calculate the communication time when the terminal control device 2, the terminal device 3, and the relay device 4 communicate based on the number of hops between the devices, for example.
- the offset time calculation unit 22 is configured so that the communication time of the previous terminal device 3 and the offset time of the subsequent terminal device 3 are the same.
- the offset time of the subsequent terminal device 3 can be calculated.
- the offset time refers to the processing time of the terminal device 3 that performs the transmission process before the terminal device 3 that performs the transmission process when there are a plurality of terminal devices 3 that perform the terminal process within the same period. Time to wait for other time.
- the subsequent terminal device 3 can start transmission of measurement data at the same time as the communication time of the previous terminal device 3 ends. it can. Thereby, the communication time of the previous terminal device 3 and the communication time of the subsequent terminal device 3 can be avoided, and the power of each terminal device 3 can be used effectively.
- the offset time management unit 23 can manage, for example, the offset time calculated above in association with the group to which each terminal device 3 belongs.
- the data indicating the offset time managed by the offset time management unit 23 is transmitted to each corresponding terminal device 3 by wireless communication.
- the measurement cycle management unit 24 can manage, for example, a measurement cycle set for each terminal device 3 in association with each terminal device 3.
- the data indicating the measurement period managed by the measurement period management unit 24 is transmitted to each corresponding terminal device 3 by wireless communication.
- the measurement data storage unit 25 can hold, for example, measurement data received from the terminal device 3 in association with each terminal device 3.
- the terminal device 3 is controlled so as to be activated at the activation time, the offset time storage unit 31 that records the offset time, the activation time calculation unit 32 that calculates the next activation time, the measurement cycle storage unit 33 that records the measurement period, and so on.
- a start control unit 34 that performs the measurement, and a measurement unit 35 that measures the operation state of the steam trap 5.
- the offset time storage unit 31 can record the offset time calculated by the terminal control device 2, for example.
- the activation time calculation unit 32 calculates a reference time based on, for example, the current time and the measurement cycle, adds the offset time to the reference time, and subtracts the communication time of the measurement data, for the next time of the terminal device 3. It can be calculated as the activation time.
- the calculated next activation time is set in the activation control unit 34.
- the measurement cycle storage unit 33 can record the measurement cycle for the terminal device 3 that is managed by the terminal control device 2, for example.
- the activation control unit 34 can control the terminal device 3 to be activated at the next activation time calculated by the activation time calculation unit 32 described above.
- the measuring unit 35 can measure, for example, the surface temperature and / or ultrasonic vibration of the steam trap 5. Note that the measurement data of the steam trap 5 measured by the measurement unit 35 is transmitted to the terminal control device 2 by wireless communication.
- FIG. 3 is a diagram illustrating an example of a hardware configuration in which the terminal control device 2 is realized using a CPU or the like.
- the terminal control device 2 can be configured using, for example, a notebook personal computer.
- the terminal control device 2 includes a display 41, a CPU 42, a RAM (Random Access Memory) 43, a hard disk 44, a keyboard / mouse 45, and a wireless communication circuit 46.
- the display 41 can display input contents from the keyboard / mouse 45, measurement data, and the like.
- the CPU 42 can execute a terminal control program 442 stored in the hard disk 44.
- the RAM 43 can provide an address space to the CPU 42.
- the hard disk 44 can store an OS (Operating System) 441, a terminal control program 442, offset time management data 443, measurement cycle management data 444, measurement data 445, and the like.
- the keyboard / mouse 45 can accept an input operation for controlling the terminal device 3 from the user.
- the wireless communication circuit 46 can wirelessly communicate with the terminal device 3 or the relay device 4.
- the communication time calculation unit 21 and the offset time calculation unit 22 constituting the terminal control device 2 shown in FIG. 2 are realized by executing a terminal control program 442 on the CPU 42.
- the offset time management unit 23, the measurement cycle management unit 24, and the measurement data storage unit 25 correspond to the areas assigned to the offset time management data 443, the measurement cycle management data 444, and the measurement data 445 on the hard disk 44, respectively. .
- FIG. 4 is a diagram illustrating an example of a hardware configuration in which the terminal device 3 is realized using a CPU or the like.
- the terminal device 3 includes an RTC (Real Time Clock) 51, a CPU 52, a RAM 53, a measurement sensor 54, a wireless communication circuit 55, an EEPROM (Electrically Erasable and Programmable Read Only Memory) 56, and a battery 57.
- the RTC 51 can provide data indicating the current time by the clock function, and can activate the terminal device 3 at a time corresponding to the set activation time data 511 by the timer function.
- the CPU 52 can execute a terminal processing program 561 stored in the EEPROM 56.
- the RAM 53 can provide an address space to the CPU 52 and can store measurement data 531 and the like.
- the measurement sensor 54 can measure the operating state of the steam trap 5 by using, for example, a vibration sensor using a piezoelectric element or a temperature sensor using a thermocouple.
- the wireless communication circuit 55 can communicate with the terminal control device 2 or the repeater 4.
- the EEPROM 56 can store a terminal processing program 561, measurement cycle data 562, and offset time data 563.
- the battery 57 can supply power to each unit of the terminal device 3.
- the battery 57 corresponds to, for example, a dry battery or a storage battery.
- the offset time storage unit 31 and the measurement cycle storage unit 33 correspond to the measurement cycle data 562 and the offset time data 563 of the EEPROM 56, respectively.
- the activation control unit 34 corresponds to the RTC 51.
- the measurement unit 54 corresponds to the measurement sensor 54.
- FIG. 5 is a diagram illustrating an example of a flowchart of an initial setting process in the terminal control system 1.
- the terminal control device 2 and the terminal device 3 perform processing in cooperation with each other will be described, but these two devices do not necessarily have to perform processing in cooperation.
- the terminal control device 2 executes steps S101 to S106, it is not necessary for the terminal device 3 to execute the processing of steps S107 to S110 in conjunction with this.
- Step S101 When the user of the terminal control device 2 inputs a command for starting the initial setting process by operating the keyboard / mouse 45, the CPU 42 of the terminal control device 2 calculates the communication time for each group related to the terminal device 3. (Step S101). CPU42 calculates the communication time for every group based on the number of hops according to the number of the relay machines 4 which pass, for example when the terminal control apparatus 2 and the terminal device 3 communicate.
- the number of hops of the terminal device 3 a belonging to the group 1 is “5 (in FIG. 1, parentheses are shown along the line connecting the terminal device 3 a and the relay 4. It corresponds to the number.) ”.
- the number of hops of the terminal device 3b belonging to group 1 is “4”
- the number of hops of the terminal devices 3c to 3e belonging to group 1 is “3”. Therefore, the total number of hops of the group 1 is “18”, which is the total number of hops of the terminal devices 3a to 3e.
- the communication time per number of hops is, for example, “0.5 seconds”
- the communication time of group 1 that is, the total communication time of all terminal devices belonging to group 1 is 1 for the total number of hops “18”. It can be calculated as “9 seconds” multiplied by the communication time “0.5 seconds” per hop number.
- the communication time of group 2 (that is, the total communication time of all terminal devices belonging to group 2) is obtained by multiplying the total hop count “6” by the communication time “0.5 seconds” per hop count. Seconds ".
- the number of hops of the terminal device 3h belonging to the group 3 is “4”, and the number of hops of the terminal devices 3i and 3j belonging to the group 3 is “5”, respectively.
- the total number of hops of the devices 3h to 3j is “14”. Therefore, the communication time of group 3 (that is, the total communication time of all terminal devices belonging to group 3) is “7” obtained by multiplying the total number of hops “14” by the communication time “0.5 seconds” per number of hops. Seconds ".
- the communication time of group 1 is calculated as “9 seconds”, the communication time of group 2 as “3 seconds”, and the communication time of group 3 as “7 seconds”.
- the CPU 42 selects one group of the terminal devices 3 (step S102).
- the group selection order can be determined in the order in which the terminal device and the relay device can be operated efficiently.
- groups are selected in the order of group 1, group 2, and group 3.
- the CPU 42 calculates the offset time of each terminal device belonging to the group based on the communication time and the offset time of the immediately preceding group (step S103). For example, the CPU 42 can set the sum of the communication time of all the terminal devices 3 belonging to the immediately preceding group and the offset time of each terminal device 3 belonging to the immediately preceding group as the offset time of each terminal device belonging to the group. .
- group 1 there is no previous group, and therefore, for example, a predetermined value “5 seconds” is set as the offset time of the terminal devices 3 belonging to group 1. Also, a predetermined value other than “5 seconds” may be set as the offset time.
- the CPU 42 records the offset time calculated above in the offset time management data 443 on the hard disk 44 in association with each group (step S104).
- FIG. 6 is a diagram illustrating an example of the offset time management data 443.
- the CPU 42 records “5 seconds” as the offset time of the group 1.
- the CPU 42 determines whether there is an unprocessed group (step S105), and if there is a group, returns to step S102 and repeats the process (Yes determination in step S105).
- step S103 the CPU 42 adds up the communication time “9 seconds” of the immediately preceding group 1 and the offset time “5 seconds” of group 1 to “14 seconds”. Is set as the offset time of each terminal device 3 belonging to group 2.
- step S103 the CPU 42 adds “17 seconds”, which is the sum of the communication time “3 seconds” of group 2 which is the immediately preceding group and the offset time “14 seconds” of group 2. Is set as the offset time of each terminal device 3 belonging to group 3.
- the CPU 42 sets the sum of the communication time and offset time of the immediately preceding group as the offset time of another group that performs continuous communication. For example, the CPU 42 records “14 seconds” as the offset time for group 2 and “17 seconds” as the offset time for group 3.
- FIG. 7 is a diagram schematically illustrating an example of processing when the activation time of the terminal device 3 is calculated. As shown in FIG. 7, offset times Toff1 (5 seconds), Toff2 (14 seconds), and Toff3 (17 seconds) recorded in association with each group are set.
- the CPU 42 transmits the offset time recorded in association with each group to each terminal device 3 belonging to each group (step S106). It is assumed that a correspondence table (not shown) between groups and terminal devices is recorded in the terminal control device 2 in advance so that the CPU 42 can recognize them.
- the CPU 42 transmits the offset time “5 seconds” to the terminal devices 3a to 3e belonging to the group 1, transmits the offset time “14 seconds” to the terminal devices 3f and 3g, and sets the offset time “17 seconds” to the terminal device. Send to 3h-3j.
- the terminal control device 2 and the terminal device 3 are not necessarily linked.
- the steam trap 5 is installed after the user of the terminal control device 2 executes the processing of steps S101 to S105 in a place away from the steam piping facility where the steam trap 5 to be measured is installed. You may make it perform the process of said step S106 after moving to the vicinity of a steam piping installation.
- FIG. 8A, 8B, and 8C are diagrams illustrating examples of measurement cycle data and offset time data recorded in the EEPROM 56 of the terminal device 3 belonging to each of the groups 1 to 3.
- FIG. 8A, 8B, and 8C are diagrams illustrating examples of measurement cycle data and offset time data recorded in the EEPROM 56 of the terminal device 3 belonging to each of the groups 1 to 3.
- FIG. 8A, 8B, and 8C are diagrams illustrating examples of measurement cycle data and offset time data recorded in the EEPROM 56 of the terminal device 3 belonging to each of the groups 1 to 3.
- each CPU 52 of the terminal devices 3a to 3e belonging to the group 1 records “5 seconds” 72 as the offset time of its own terminal device.
- each CPU 52 of the terminal devices 3f and 3g belonging to the group 2 records “14 seconds” 72 as the offset time of its own terminal device.
- each CPU 52 of the terminal devices 3h to 3i belonging to the group 3 records “17 seconds” 72 as the offset time of its own terminal device.
- FIG. 9 is a diagram illustrating an example of a flowchart of a startup time calculation process subroutine in the terminal device.
- CPU52 acquires the present time from RTC (step S201). For example, as shown in FIG. 7, the CPU 52 acquires “06:45:30” as the current time Tnow.
- CPU52 reads the measurement cycle (step S202). For example, the CPU 52 reads “60 minutes” from the measurement cycle data 562a shown in FIG. 8A. It is assumed that each data of the measurement cycle data 562a to 562c shown in FIGS. 8A to 8C is set in advance in each terminal device 3 of the corresponding group. For example, in the initial setting process described above, the measurement cycle data corresponding to the terminal device 3 may be transmitted from the terminal control device 2.
- the CPU 52 calculates the next reference time from the current time and the measurement cycle (step S203). Note that, as shown in FIG. 7, the origin time that is the origin when all the terminal devices 3 calculate the activation time is “00:00:00”. The origin time may be a time other than the origin time as long as it is a time that is set in common to all the terminal devices 3.
- the CPU 52 determines, as a next reference time, a time that is a future time from the current time and that is closest to the current time among times that are multiples of the measurement period calculated from the origin time. As shown in FIG. 7, when the origin time is “00:00:00”, the current time Tow is “06:45:30”, and the measurement cycle Tcyc is “60 minutes”, the reference time Tnxt is “ 07:00:00 ”can be calculated.
- the CPU 52 reads the offset time recorded in the offset time data 563 of the EEPROM 56 (step S204). For example, the CPU 52 of the terminal devices 3a to 3e belonging to the group 1 reads “5 seconds” as the offset time from the offset time data 563a shown in FIG. 8A.
- the CPU 52 calculates a time (next activation time) at which the terminal device 3 should be activated next time (step S205) based on the reference time, the offset time, and the measurement time.
- the measurement time it is assumed that “2 seconds” is set as a time sufficient for the measurement sensor 54 of the terminal device 3 to measure the operation state of the steam trap.
- the measurement time may be longer or shorter than “2 seconds”.
- the CPUs 52 of the terminal apparatuses 3a to 3e belonging to the group 1 add the offset time “5 seconds” 563a of the terminal apparatus 3 belonging to the group 1 shown in FIG. 8A to the reference time Tnxt “07:00:00”. Then, “07:00:03”, which is the time obtained by subtracting the measurement time “2 seconds” of the measurement sensor 54 described above, is calculated as its next activation time.
- each of the CPUs 52 of the terminal devices 3f and 3g belonging to the group 2 has the offset time “14 seconds” of the terminal device 3 belonging to the group 2 shown in FIG. 8B at the reference time Tnxt “07:00:00”.
- the time “07:00:12” which is the time obtained by subtracting the measurement time “2 seconds” of the measurement sensor 54 described above, is calculated as its own next activation time.
- each of the CPUs 52 of the terminal devices 3h to 3j belonging to the group 3 has the offset time “17 seconds” of the terminal device 3 belonging to the group 2 shown in FIG. 8C at the reference time Tnxt “07:00:00”.
- the time “07:00:15” which is the time obtained by subtracting the above-described measurement time “2 seconds” of the measurement sensor 54, is calculated as the next activation time of itself.
- the CPU 52 returns to step S109 in FIG. 5 and sets the calculated next activation time in the RTC.
- the CPUs 52 of the terminal devices 3a to 3e belonging to the group 1 set the next activation time “07:00:03” in the activation time data 511 of the RTC 51.
- each CPU 52 of the terminal devices 3f and 3g belonging to the group 2 sets the next activation time “07:00:12” in the activation time data 511 of the RTC 51.
- the CPUs 52 of the terminal devices 3h to 3j belonging to the group 3 set the next activation time “07:00:15” in the activation time data 511 of the RTC 51.
- the CPU 52 After the next activation time is set in the RTC 51, the CPU 52 turns off the terminal device 3. Thereby, since the terminal device 3 does not wake up until the next activation time, battery consumption can be suppressed.
- a state in which the terminal device 3 is turned off may be referred to as a “sleeping state”. In the sleeping state, power is supplied to the RTC 51 of the terminal device 3, and the timer function of the RTC 51 is operable.
- FIG. 10 is a diagram illustrating an example of a flowchart of measurement processing according to the terminal control system 1.
- the terminal device 3 is activated at the activation time set in the RTC 51. Specifically, power is supplied from the battery 57 to each part of the terminal device 3 by the activation signal transmitted by the timer function of the RTC 51, and the terminal device 3 is activated.
- the CPU 52 of the terminal device 3 When the power supply from the battery 57 is received, the CPU 52 of the terminal device 3 outputs a measurement command to the measurement sensor 54 (step S301).
- the measurement sensor 54 is a temperature sensor, for example, the temperature of the outer surface of the steam trap 5 is measured by a thermocouple.
- the measurement sensor 54 is a vibration sensor, for example, an operation sound generated when a valve disk provided in the steam trap 5 is operated, or an excessive sound generated when steam vigorously flows through the internal passage of the steam trap 5. Vibration caused by sound waves is measured by a piezoelectric element.
- the measurement sensor 54 may include both a temperature sensor and a vibration sensor. Further, other sensors may be provided alone or in combination.
- the CPU52 acquires measurement data from the measurement sensor 54 (step S302).
- the CPU 52 acquires, for example, temperature data or / and vibration data and records the measurement data 531 in the RAM 53.
- the CPU 52 determines whether or not the offset time has elapsed. If the CPU 52 determines that the offset time has elapsed (Yes determination in step S303), the CPU 52 transmits the acquired measurement data to the terminal control device 2 (step S304).
- the CPU 52 wirelessly transmits, for example, temperature data and / or vibration data recorded in the measurement data 531 of the RAM 53 to the terminal control device 2 using the wireless communication circuit 55. Note that the measurement data is actually wirelessly transmitted to the terminal control device 2 via one or more relay devices 4.
- FIG. 11 is a diagram illustrating an example of measurement data 531 transmitted from the terminal device 3 to the terminal control device 2.
- the transmission destination address 110 “D001” indicates data for specifying the relay device 4, for example.
- the transmission source address 110 “S001” indicates, for example, data for specifying the terminal device 3.
- the temperature data 112 “200 ° C.” indicates, for example, temperature data acquired from the measurement sensor 54 (temperature sensor).
- the vibration data 113 “20 kHz” indicates vibration data acquired from, for example, the measurement sensor 54 (vibration sensor).
- the trap operation frequency 114 “6 times” indicates the operation number of the steam trap 5 calculated based on vibration data acquired from the measurement sensor 54 (vibration sensor), for example.
- the number of activations of the steam trap 5 can be, for example, the number of times that the value indicating the vibration frequency becomes a maximum (peak) from the history of vibration data acquired up to the present after the previous measurement data transmission. .
- the CPU 42 of the terminal control device 2 Upon receiving the transmission from the terminal device 3, the CPU 42 of the terminal control device 2 records the measurement data (step S308).
- the CPU 42 records temperature data and / or vibration data received from the terminal device 3 as, for example, measurement data 445 of the hard disk 44 of the terminal control device 2.
- the measurement data is actually wirelessly transmitted from the terminal device 3 via one or two or more repeaters 4.
- the measurement data 445 has the same format as the measurement data 531 shown in FIG. 11, and records a plurality of measurement data 531 from different transmission sources.
- the CPU 52 of the terminal device 3 executes a startup time calculation process in a subroutine (step S305).
- the startup time calculation process executed here is the same as the flowchart shown in FIG. However, since the current time is after the reference time when the activation time calculation process in step S305 is executed, a new activation time is calculated based on the new reference time.
- the CPU 52 sets the calculated next startup time in the RTC (step S306). Further, after setting the next activation time in the RTC 51, the CPU 52 turns off the power supply of the terminal device 3. As described above, when the terminal device 3 transmits the measurement data to the terminal control device 2, the next activation time is calculated and set in the RTC, and then the power is turned off to shift to the sleeping state. Thereby, the terminal device 3 can suppress battery consumption until the next activation time, and can achieve power saving of the terminal.
- FIG. 12 is a diagram illustrating an example of the overall configuration of the terminal control system 1 according to the second embodiment of the present invention.
- the main difference between the present embodiment and the first embodiment is that the measurement periods of the terminal devices 3 belonging to the same group may be different. That is, in the first embodiment, the measurement cycle is set to only “60 minutes”, but in the second embodiment, the measurement cycle is set to “30 minutes”, “1 hour”, and “3 hours”. Set to one of the following.
- symbol is attached
- Each terminal device 3 has a measurement period set in advance. For example, the measurement cycle “30 minutes” is set for the terminal device 3a (in FIG. 12, the measurement cycle “30 minutes” is indicated as [30 m]). Similarly, for example, the terminal device 3b has a measurement cycle “1 hour” (in FIG. 12, the measurement cycle “1 hour” is indicated as [1h]). Similarly, for example, the measurement cycle “3 hours” is set in the terminal device 3c (in FIG. 12, the measurement cycle “3 hours” is indicated as [3h]).
- different measurement cycles may be set for the terminal devices belonging to the same group.
- three types of measurement periods of “30 minutes”, “1 hour”, and “3 hours” are set, but more or less types of measurement periods may be set.
- the terminal device 3 executes measurement processing for each set measurement cycle. For example, the terminal device 3a executes measurement processing every “30 minutes”, the terminal device 3b executes measurement processing every “1 hour”, and the terminal device 3c executes measurement processing every “3 hours”.
- the terminal devices 3a and 3b execute measurement processing. Further, for example, only the terminal device 3a executes the measurement process in a timing period in which the reference time is 30 minutes and multiple times of 30 minutes (excluding multiple times of 60 minutes or 180 minutes) from the origin time. .
- the terminal devices 3 having different measurement cycles may perform measurement processing at the same time.
- a large number of terminal devices 3 may transmit measurement data to the terminal control device 2 at a time, so that the communication waiting time of the terminal device 3 may become long.
- the power consumption of the terminal device 3 increases and the battery 57 becomes worse.
- an offset time is determined so that the communication waiting time of each terminal device 3 is as short as possible, and the terminal device 3 power saving is realized.
- FIG. 13 is a diagram illustrating an example of a functional block diagram of the terminal control system 1 according to the second embodiment.
- FIG. 13 is basically the same as that shown in FIG. 2 except for the following points.
- the communication time calculation unit 21 of the terminal control device 2 according to the second embodiment can calculate the communication time of the terminal device 3 for each measurement cycle acquired from the measurement cycle management unit 24.
- the offset time calculation unit 22 of the terminal control device 2 according to the second embodiment is configured so that, for example, two terminal devices 3 that belong to different groups and have the same measurement cycle perform terminal processing in the timing period of the same reference time. Assuming that it is executed, the offset time of the subsequent terminal apparatus 3 can be calculated so that the communication time of the previous terminal apparatus 3 and the offset time of the subsequent terminal apparatus 3 are the same.
- the offset time calculation unit 22 of the terminal control device 2 allows the terminal devices 3 having different measurement cycles among the terminal devices 3 belonging to the same group to perform terminal processing in the timing period of the same reference time.
- the total offset time of each terminal device 3 calculated by assuming as described above can be calculated as the offset time of the entire group.
- the offset time management unit 23 of the terminal control device 2 according to the second embodiment can manage, for example, the offset time calculated above in association with the group to which each terminal device 3 belongs and the measurement cycle.
- the measurement cycle management unit 24 of the terminal control device 2 can manage, for example, the measurement cycle set for each group to which the terminal device 3 belongs in association with each terminal device 3.
- the data indicating the measurement period managed by the measurement period management unit 24 is transmitted to each corresponding terminal device 3 by wireless communication.
- the offset time storage unit 31 of the terminal device 3 according to the second embodiment can record the offset time for each measurement cycle calculated by the terminal control device 2, for example.
- the measurement cycle storage unit 33 of the terminal device 3 can record at least one measurement cycle for the terminal device 3 managed by the terminal control device 2, for example. .
- a hardware configuration example of the terminal control device 2 is the same as that shown in FIG.
- the hardware configuration example of the terminal device 3 is the same as that shown in FIG.
- FIG. 14 is a diagram illustrating an example of a flowchart of an initial setting process in the terminal control system 1 according to the second embodiment.
- the CPU 42 determines each group and each measurement cycle based on the number of hops according to the number of relays 4 through which the terminal control device 2 and the terminal device 3 communicate.
- the communication time is calculated.
- all terminal devices 3 belonging to group 1 and having a measurement cycle of “30 minutes (30 m)” are measuring terminals 3a and 3d.
- the number of hops of the measurement terminal 3a is “5” and the number of hops of the terminal device 3d is “3”
- the total number of hops of the terminal device 3 in the group 1 and the measurement cycle “30 minutes” is The total number of hops of the terminal devices 3a and 3d is “8”.
- the communication time per number of hops is, for example, “0.5 seconds”
- the communication time of all terminal apparatuses 3 related to group 1 and the measurement cycle “30 minutes” that is, group 1).
- the total communication time of all the terminal devices 3 whose measurement cycle is “30 minutes” is “4 seconds” obtained by multiplying the total number of hops “8” by the communication time “0.5 seconds” per number of hops. And can be calculated.
- the total number of hops of all the terminal devices 3 related to the group 2 and the measurement cycle “30 minutes” is the terminal The number of hops of the device 3g. Therefore, the communication time of all the terminal devices 3 related to the group 2 and the measurement cycle “30 minutes” (that is, the total communication time of all the terminal devices whose measurement cycle is “30 minutes” in the group 2) is the total number of hops “3”. "1.5 seconds" multiplied by the communication time "0.5 seconds" per the number of hops.
- the total number of hops of the terminal device 3 related to the group 3 and the measurement cycle “30 minutes” is The number of hops of 3j is “5”. Therefore, the communication time of all the terminal devices 3 related to the group 3 and the measurement cycle “30 minutes” (that is, the total communication time of all the terminal devices whose measurement cycle is “30 minutes” in the group 3) is the total number of hops “5”. "2.5 seconds" multiplied by the communication time "0.5 seconds" per hop number.
- the communication time of all the terminal devices 3 related to the group 1 and the measurement cycle “30 minutes” is “4 seconds”, and the communication time of all the terminal devices 3 related to the group 2 and the measurement cycle “30 minutes” is “1”. .5 second ”, the communication time of all the terminal devices 3 for the group 3 and the measurement cycle“ 30 minutes ”is calculated as“ 2.5 seconds ”, respectively.
- the communication time of all the terminal devices 3 related to the group 1 and the measurement cycle “1 hour” is “3.5 seconds”
- the communication time of all the terminal devices 3 related to the group 2 and the measurement cycle “1 hour” is The communication time of all terminal apparatuses 3 for “1.5 seconds”, group 3, and measurement cycle “3 hours” is calculated as “2.5 seconds”, respectively.
- the communication time of all the terminal devices 3 related to the group 1 and the measurement cycle “3 hours” is “1.5 seconds”, and the communication time of all the terminal devices 3 related to the group 2 and the measurement cycle “3 hours”. Is calculated as “2 seconds”, and the communication time of all the terminal devices 3 for the group 3 and the measurement period “3 hours” is calculated as “0 seconds”.
- the CPU 42 selects one combination of the group of terminal devices 3 and the measurement cycle (step S402).
- the groups are sequentially selected in the order of group 1, group 2, and group 3, and the measurement periods are sequentially selected in the order of “30 minutes”, “1 hour”, and “3 hours”. . That is, in the first increment, the combination of group 1 and the measurement period “30 minutes” is selected, and in the last increment, the combination of group 3 and the measurement period “3 hours” is selected.
- the CPU 42 belongs to a group that follows the group and is set to the same measurement period as the measurement period.
- the offset time of the device 3 is calculated (step S403).
- the CPU 42 includes the total communication time of all the terminal devices 3 belonging to the immediately preceding group and set with the same measurement cycle, and the offset time of each terminal device 3 belonging to the immediately preceding group and set with the same measurement cycle. Is the offset time of each terminal device 3 that belongs to the subsequent group and in which the same measurement cycle as the measurement cycle is set. Note that when group 1 is selected, there is no previous group, and therefore, for example, a predetermined value “2 seconds” is set as the offset time of the terminal device 3 related to group 1 and each measurement cycle. Also, a predetermined value other than “2 seconds” may be set as the offset time.
- the CPU 42 records the offset time calculated above in the offset time management data 443 on the hard disk 44 in association with the combination of each group and measurement cycle (step S404).
- FIG. 15 is a diagram illustrating an example of the offset time management data 443 according to the second embodiment.
- the CPU 42 records “2 seconds” as the offset time of each combination of the group 1 and the measurement cycle “30 minutes”, the group 1 and the measurement cycle “1 hour”, and the group 1 and the measurement cycle “3 hours”.
- the CPU 42 determines whether there is a combination of an unprocessed group and a measurement cycle (step S405). If there is a combination of an unprocessed group and a measurement cycle, the CPU 42 returns to step S402 and repeats the process (Yes determination in step S405). .
- step S403 the CPU 42 determines the communication time “4” of the terminal device 3 related to group 1 and the measurement cycle “30 minutes” as the immediately preceding group.
- “6 seconds” which is the sum of the “second” and the offset time “2 seconds” of the terminal device 3 related to the group 1 and the measurement cycle “30 minutes”, is the terminal device 3 related to the group 2 and the measurement cycle “30 minutes”. Set as the offset time.
- step S403 the CPU 42 determines the communication time “3” of the terminal device 3 related to group 1 and measurement cycle “1 hour” as the immediately preceding group. .5 seconds ”and the offset time“ 2 seconds ”of the terminal device 3 for the group 1 and the measurement cycle“ 1 hour ”are changed to“ 5.5 seconds ”as the group 2 and the measurement cycle“ 1 hour ”. This is set as the offset time of the terminal device 3.
- step S402 When the combination of the group 2 and the measurement cycle “3 hours” is selected in step S402, the CPU 42 in step S403, the communication time “1” of the terminal device 3 related to the immediately preceding group 1 and the measurement cycle “3 hours”. .3.5 second ”and the offset time“ 2 seconds ”of the terminal device 3 related to the group 1 and the measurement cycle“ 3 hours ”are changed to“ 3.5 seconds ”as the group 2 and the measurement cycle“ 3 hours ”. This is set as the offset time of the terminal device 3.
- step S403 the CPU 42 determines the communication time “1” of the terminal device 3 related to group 2 and measurement cycle “30 minutes” as the immediately preceding group. .5 seconds ”and the offset time“ 6 seconds ”of the terminal device 3 for the group 2 and the measurement cycle“ 30 minutes ”are added to“ 7.5 seconds ”as the group 3 and the measurement cycle“ 30 minutes ”. This is set as the offset time of the terminal device 3.
- step S403 the CPU 42 determines the communication time “1” of the terminal device 3 related to group 2 and measurement cycle “1 hour” as the immediately preceding group. .5 seconds ”and the offset time“ 5.5 seconds ”of the terminal device 3 related to the group 2 and the measurement cycle“ 1 hour ”are changed to“ 7 seconds ”as the group 3 and the measurement cycle“ 1 hour ”. This is set as the offset time of the terminal device 3.
- step S403 the CPU 42 determines the communication time “0” of the terminal device 3 related to group 2 and measurement cycle “3 hours” as the immediately preceding group. “3.5 seconds”, which is the sum of the “second” and the offset time “3.5 seconds” of the terminal device 3 related to the group 2 and the measurement cycle “3 hours”, becomes the group 3 and the measurement cycle “3 hours”. This is set as the offset time of the terminal device 3.
- the CPU 42 is the communication terminal 3 of another group that performs continuous communication on the total of the communication time and the offset time of the terminal device 3 related to the combination of the immediately preceding group and the measurement cycle, and is the same. It is set to the offset time of the terminal device 3 for which the measurement cycle is set.
- the CPU 42 sets “6 seconds” as the offset time of the terminal device 3 related to the group 2 and the measurement cycle “30 minutes”, and sets the terminal device 3 related to the group 2 and the measurement cycle “1 hour”. “5.5 seconds” is recorded as the offset time, and “3.5 seconds” is recorded as the offset time of the terminal device 3 related to the group 2 and the measurement cycle “3 hours”.
- the CPU 42 sets “7.5 seconds” as the offset time of the terminal device 3 related to the group 3 and the measurement cycle “30 minutes”, and terminal devices related to the group 3 and the measurement cycle “1 hour”. “7 seconds” is recorded as the offset time of 3, and “3.5 seconds” is recorded as the offset time of the terminal device 3 related to the group 3 and the measurement cycle “3 hours”.
- the CPU 42 transmits the offset time recorded in association with each group and each measurement cycle to each terminal device belonging to each group (step S406). It is assumed that a correspondence table (not shown) between groups and measurement periods and terminal devices is recorded in the terminal control device 2 in advance so that the CPU 42 can recognize them.
- the CPU 42 records the offset time “2 seconds” recorded in association with the group 1 and the measurement cycle “30 minutes”, the offset time “2 seconds” recorded in association with the group 1 and the measurement cycle “1 hour”, and The offset time “2 seconds” recorded in association with the group 1 and the measurement cycle “3 hours” is transmitted to the terminal devices 3a to 3e related to the group 1, respectively.
- the CPU 42 records the offset time “6 seconds” recorded in association with the group 2 and the measurement cycle “30 minutes”, and the offset time “5.5 seconds” recorded in association with the group 2 and the measurement cycle “1 hour”.
- the offset time “3.5 seconds” recorded in association with the group 2 and the measurement period “3 hours” is transmitted to the terminal devices 3f and 3g related to the group 2, respectively.
- the CPU 42 records the offset time “7.5 seconds” recorded in association with the group 3 and the measurement cycle “30 minutes”, and the offset time “7 seconds” recorded in association with the group 3 and the measurement cycle “1 hour”.
- the offset time “3.5 seconds” recorded in association with the group 3 and the measurement period “3 hours” is transmitted to the terminal devices 3h to 3j related to the group 3, respectively.
- FIGS. 16A, 16B, and 16C are diagrams showing examples of measurement cycle data and offset time data recorded in the EEPROM 56 of the terminal device 3 belonging to each of the groups 1 to 3.
- FIG. 16A, 16B, and 16C are diagrams showing examples of measurement cycle data and offset time data recorded in the EEPROM 56 of the terminal device 3 belonging to each of the groups 1 to 3.
- each CPU 52 of the terminal devices 3a to 3e belonging to the group 1 records “30 minutes”, “1 hour”, and “3 hours” as the measurement period data 562d of its own terminal device, and as the offset time data 563d.
- the offset time “2 seconds” associated with the measurement cycle “30 minutes”, the offset time “2 seconds” associated with the measurement cycle “1 hour”, and the offset time “2” associated with the measurement cycle “3 hours” Record seconds.
- each CPU 52 of the terminal devices 3f and 3g belonging to the group 2 records “30 minutes”, “1 hour”, and “3 hours” as the measurement period data 562d of its own terminal device, and as the offset time data 563d.
- the offset time “6 seconds” associated with the measurement period “30 minutes”, the offset time “5.5 seconds” associated with the measurement period “1 hour”, and the offset time associated with the measurement period “3 hours” Record “3.5 seconds” respectively.
- each CPU 52 of the terminal devices 3h to 3j belonging to the group 3 records “30 minutes”, “1 hour”, and “3 hours” as the measurement period data 562d of its own terminal device, and as the offset time data 563d.
- the offset time “7.5 seconds” associated with the measurement cycle “30 minutes”, the offset time “7 seconds” associated with the measurement cycle “1 hour”, and the offset time associated with the measurement cycle “3 hours” Record “3.5 seconds” respectively.
- FIG. 17 is a diagram illustrating an example of a flowchart of a startup time calculation process in the terminal device 3.
- the CPU 52 acquires the current time from the RTC (step S501).
- the CPU 52 reads each measurement cycle (step S502). For example, the CPU 52 reads the measurement cycles “30 minutes”, “1 hour”, and “3 hours” from the measurement cycle data 562d shown in FIG. 16A.
- the CPU 52 calculates the next reference time from the current time and each measurement cycle (step S503). For example, when calculating from the origin time, the CPU 52 uses a time corresponding to a multiple of the minimum measurement period recorded in the measurement period data 562 and a future time closest to the current time as the next reference time. decide.
- the CPU 52 starts from the origin time “00:00:00” and is a time corresponding to a multiple of the minimum measurement cycle “30 minutes”, and is the most current time “05:50:00”
- the next reference time is “06:00:00”, which is the time in the near future.
- the CPU 52 reads all the offset times corresponding to the measurement cycle in which the calculated reference time is a multiple (step S504).
- the CPU 52 of the terminal devices 3a to 3e belonging to the group 1 has a measurement cycle of “30 minutes”, “1 hour”, and “3 hours” in which the reference time “06:00:00” is a multiple. From the offset time data 563d shown in FIG. 16A, the offset time “2 seconds” corresponding to the measurement period “30 minutes”, the offset time “2 seconds” corresponding to the measurement period “1 hour”, and the measurement period “3 hours”. The offset time “2 seconds” corresponding to is read.
- the measurement cycle in which the reference time is a multiple is “30 minutes” and “1 hour”, so the CPU 52 determines the measurement cycle “30 minutes”.
- the offset time “2 seconds” corresponding to “1” and the offset time “2 seconds” corresponding to the measurement period “1 hour” are read.
- the CPU 52 calculates a time (next activation time) at which the terminal device 3 should be activated next time based on the reference time, the total offset time, and the measurement time (step S505).
- a time next activation time
- the measurement time it is assumed that “2 seconds” is set as the measurement time, as in the first embodiment.
- each of the CPUs 52 of the terminal devices 3a to 3e belonging to the group 1 has an offset time “2 seconds” corresponding to the measurement cycle “30 minutes” shown in FIG. 16A at the reference time Tnxt “06:00:00”
- the measurement sensor 54 described above is added by adding “6 seconds” which is the sum of the offset time “2 seconds” corresponding to the measurement cycle “1 hour” and the offset time “2 seconds” corresponding to the measurement cycle “3 hours”.
- the time obtained by subtracting the measurement time of “2 seconds” is calculated as “06:00:04” as the next activation time of itself.
- each of the CPUs 52 of the terminal devices 3f and 3g belonging to the group 2 has an offset time “6” corresponding to the measurement cycle “30 minutes” illustrated in FIG. 16B at the reference time Tnxt “06:00:00”.
- each of the CPUs 52 of the terminal devices 3h to 3j belonging to the group 3 has an offset time “7” corresponding to the measurement cycle “30 minutes” illustrated in FIG. 16C at the reference time Tnxt “06:00:00”. .5 seconds ”, the offset time“ 7 seconds ”corresponding to the measurement period“ 1 hour ”, and the offset time“ 3.5 seconds ”corresponding to the measurement period“ 3 hours ”are added to“ 18 seconds ”. Then, “06:00:16”, which is the time obtained by subtracting the measurement time “2 seconds” of the measurement sensor 54 described above, is calculated as its next activation time.
- FIG. 18 is a diagram schematically illustrating an example of processing when the activation time of the terminal device 3 is calculated. As shown in FIG. 18, offset times Toff1 (6 seconds), Toff2 (15 seconds), and Toff3 (18 seconds) recorded in association with each group are set.
- “06:00:00” is set as the next activation time of the terminal devices 3a to 3e belonging to the group 1, and as the next activation time of the terminal devices 3f and 3g belonging to the group 2.
- “06:00:13” is set, and “06:00:16” is set as the next activation time of the terminal devices 3h to 3j belonging to the group 3.
- the CPU 52 returns to step S409 in FIG. 14 and sets the calculated next activation time in the RTC.
- the CPUs 52 of the terminal devices 3 a to 3 e belonging to the group 1 set the next activation time “06:00:00” in the activation time data 511 of the RTC 51.
- the CPUs 52 of the terminal devices 3f and 3g belonging to the group 2 set the next activation time “06:00:13” in the activation time data 511 of the RTC 51.
- the CPUs 52 of the terminal devices 3h to 3j belonging to the group 3 set the next activation time “06:00:16” in the activation time data 511 of the RTC 51.
- the CPU 52 After the next activation time is set in the RTC 51, the CPU 52 turns off the power of the terminal device 3 and goes to sleep. Note that the measurement processing in the second embodiment is the same as that described with reference to FIG. 10 in the first embodiment.
- the number of hops corresponding to the number of relays 4 through which the terminal control device 2 and the terminal device 3 communicate is used, but the terminal control device 2 and the terminal device 3 are relays.
- the number of hops may be “1”.
- the present invention can also be applied by defining a single terminal device 3 that directly communicates with the terminal control device 2 as one group.
- the relay device 4 includes the same function as that of the terminal device 3 in the relay device 4 and is disposed in the upper hierarchy of the terminal device 3 together with the terminal device 3. May be performed in synchronization with the terminal device 3 arranged in a lower hierarchy thereof.
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Abstract
Description
複数の端末装置と、前記複数の端末装置を制御する制御装置とを含む端末制御システムであって、
前記端末装置は、
前記複数の端末装置が同じ期間に所定の端末処理を行う場合の基準となる基準時刻の経過後、予め設定された起動時刻に起動し、
前記端末処理として、前記起動時刻の経過後、前記基準時刻から予め設定されたオフセット時間が経過するまでにデータの送信準備を完了し、かつ、前記オフセット時間の経過後、予め設定された通信時間内に、前記制御装置に対して所定データを送信する処理を実行するものであり、
前記制御装置は、
前記通信時間に基づいて、前記端末装置に後続して前記端末処理を実行する別の端末装置についてのオフセット時間を算出し、
前記別の端末装置は、
算出された前記オフセット時間に基づいて決定された起動時刻を、次回起動時刻として設定する。
[1-1.端末制御システムの全体構成]
図1は、本発明の第1の実施形態にかかる端末制御システム1の全体構成の例を示す図である。端末制御システム1は、例えば、1つの端末制御装置2と、複数の端末装置3と、複数の中継機4とを含む。例えば端末制御装置2と中継機4は、いずれも無線通信機能を有し、相互に無線通信可能である。例えば端末装置3と中継機4は、いずれも無線通信機能を有し、相互に無線通信可能である。なお、図1においては、説明上、端末制御装置2と、端末装置3と、中継機4とを線を用いて接続しているが、無線通信機能を有する場合には何らかの接続線は必要ない。
図2は、端末制御システム1の機能ブロック図の一例を示す図である。
端末制御装置2は、通信時間を算出する通信時間算出部21と、オフセット時間を算出するオフセット時間算出部22と、算出したオフセット時間を管理するオフセット時間管理部23と、測定周期を管理する測定周期管理部24と、受信した計測データを記録する計測データ記憶部25とを備える。
端末装置3は、オフセット時間を記録するオフセット時間記憶部31と、次回起動時刻を算出する起動時刻算出部32と、測定周期を記録する測定周期記憶部33と、起動時刻に起動するように制御する起動制御部34と、スチームトラップ5の動作状態を計測する計測部35とを備える。
[1-3-1.端末制御装置2のハードウェア構成例]
図3は、端末制御装置2を、CPU等を用いて実現したハードウェア構成の一例を示す図である。端末制御装置2は、例えばノート型のパーソナルコンピュータを用いて構成することができる。
図4は、端末装置3を、CPU等を用いて実現したハードウェア構成の一例を示す図である。端末装置3は、RTC(Real Time Clock)51、CPU52、RAM53、計測センサ54、無線通信回路55、EEPROM(Electrically Erasable and Programmable Read Only Memory)56及び、バッテリー57を備える。
図5は、端末制御システム1における初期設定処理のフローチャートの一例を示す図である。なお、以下においては、端末制御装置2と端末装置3とが連携して処理を行う例を説明するが、これら2つの装置は必ずしも連携して処理を行う必要はない。例えば、端末制御装置2がステップS101~S106を実行した後、これに連動して端末装置3がステップS107~S110の処理を実行する必要はない。
図10は、端末制御システム1にかかる計測処理のフローチャートの一例を示す図である。
計測データ445は、図11に示した計測データ531と同様のフォーマットであり、送信元の異なる複数の計測データ531が記録されるものである。
図12は、本発明の第2の実施形態にかかる端末制御システム1の全体構成の例を示す図である。図12において、本実施形態と上記第1の実施形態との主な相違点は、同じグループに属する端末装置3同士の測定周期がそれぞれ異なることがある点である。つまり、第1の実施形態においては、測定周期を「60分」のみに設定していたが、第2の実施形態においては、測定周期を「30分」、「1時間」及び「3時間」のいずれかに設定する。なお、上記第1の実施形態と共通する要素については、同じ符号を付して、その重複した説明を省略する。
各端末装置3は、予め測定周期が設定されている。例えば、端末装置3aは、測定周期「30分」が設定されている(図12では、測定周期「30分」を[30m]と示している。)。同様に、例えば、端末装置3bは、測定周期「1時間」が設定されている(図12では、測定周期「1時間」を[1h]と示している。)。同様に、例えば、端末装置3cは、測定周期「3時間」が設定されている(図12では、測定周期「3時間」を[3h]と示している。)。
図13は、第2の実施形態にかかる端末制御システム1の機能ブロック図の一例を示す図である。図13は、図2に示したものと基本的に同様であるが、以下の点で異なる。
第2の実施形態にかかる端末制御装置2の通信時間算出部21は、測定周期管理部24から取得した測定周期毎に端末装置3の通信時間を算出することができる。
第2の実施形態にかかる端末装置3のオフセット時間記憶部31は、例えば端末制御装置2にて算出された、測定周期毎のオフセット時間を記録しておくことができる。
端末制御装置2のハードウェア構成例は、図3に示したものと同様である。端末装置3のハードウェア構成例は、図4に示したものと同様である。
図14は、第2の実施形態にかかる端末制御システム1における初期設定処理のフローチャートの一例を示す図である。
上記実施形態においては、端末制御装置2と端末装置3とが通信を行う場合に経由する中継機4の数に応じたホップ数を用いたが、端末制御装置2と端末装置3とが中継機4を介さずに直接通信を行う場合にはホップ数を「1」としてもよい。なお、このような場合、端末制御装置2と直接通信を行う単独の端末装置3を、1つのグループと定義して本発明を適用することもできる。
22 オフセット時間算出部
23 オフセット時間管理部
24 測定周期管理部
25 計測データ記憶部
31 オフセット時間記憶部
32 起動時刻算出部
33 測定周期記憶部
34 起動制御部
35 計測部
Claims (6)
- 複数の端末装置と、前記複数の端末装置を制御する制御装置とを含む端末制御システムであって、
前記端末装置は、
前記複数の端末装置が同じ期間に所定の端末処理を行う場合の基準となる基準時刻の経過後、予め設定された起動時刻に起動し、
前記端末処理として、前記起動時刻の経過後、前記基準時刻から予め設定されたオフセット時間が経過するまでにデータの送信準備を完了し、かつ、前記オフセット時間の経過後、予め設定された通信時間内に、前記制御装置に対して所定データを送信する処理を実行するものであり、
前記制御装置は、
前記通信時間に基づいて、前記端末装置に後続して前記端末処理を実行する別の端末装置についてのオフセット時間を算出し、
前記別の端末装置は、
算出された前記オフセット時間に基づいて決定された起動時刻を、次回起動時刻として設定する、
端末制御システム。 - 前記端末装置のそれぞれは、複数グループのうちのいずれかのグループに属し、
前記通信時間は、前記端末装置が属するグループ全体の通信時間であり、
前記制御装置は、
前記通信時間に基づいて、同一のグループに属する端末装置に後続して前記端末処理を実行する別のグループに属する端末装置についてのオフセット時間を算出する、
請求項1に記載の端末制御システム。 - 前記制御装置は、
前記複数の端末装置において、第1周期毎に前記端末処理を行う第1周期端末装置と、第2周期毎に前記端末処理を行う第2周期端末装置とが存在する場合、
前記第1周期端末装置の通信時間に基づいて、前記第1周期端末装置に後続して前記端末処理を行う別の第1周期端末装置についての第1周期オフセット時間を算出し、
前記第2周期端末装置の通信時間に基づいて、前記第2周期端末装置に後続して前記端末処理を行う別の第2周期端末装置についての第1周期オフセット時間を算出し、
前記第1周期オフセット時間と、前記第2周期オフセット時間とを合算したものを、前記別の端末装置についてのオフセット時間とする、
請求項1又は2に記載の端末制御システム。 - 前記オフセット時間は、対象物を測定するための測定時間を含み、
前記起動時刻は、前記基準時刻に前記オフセット時間を加算して前記測定時間を減算した時刻である、
請求項1~3のいずれか一項に記載の端末制御システム。 - 前記端末処理は、前記対象物を測定して得られる測定データを、前記端末装置から前記制御装置に送信する処理を含む、
請求項1~4のいずれか一項に記載の端末制御システム。 - 複数の端末装置と、前記複数の端末装置を制御する制御装置とを用いた端末制御方法であって、
前記端末装置は、
前記複数の端末装置が同じ期間に所定の端末処理を行う場合の基準となる基準時刻の経過後、予め設定された起動時刻に起動し、
前記端末処理として、前記起動時刻の経過後、前記基準時刻から予め設定されたオフセット時間が経過するまでにデータの送信準備を完了し、かつ、前記オフセット時間の経過後、予め設定された通信時間内に、前記制御装置に対して所定データを送信する処理を実行するものであり、
前記制御装置は、
前記通信時間に基づいて、前記端末装置に後続して前記端末処理を実行する別の端末装置についてのオフセット時間を算出し、
前記別の端末装置は、
算出された前記オフセット時間に基づいて決定された起動時刻を、次回起動時刻として設定する、
端末制御方法。
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