JP2012199651A - Monitoring system, monitoring device and program therefor, and terminal device and program therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a monitoring system and the like capable of securing real-time property of monitoring information even when acquiring a plurality of types of the monitoring information from a plurality of terminals.SOLUTION: A terminal 20 includes a terminal-side memory 23 for storing the monitoring information with a terminal-side time, in which monitoring information acquired at each first predetermined period is related to the terminal-side time. A monitoring device 10 includes: a monitoring device-side clock unit 13 which issues a polling start request at each second predetermined period shorter than the first predetermined period; a monitoring device-side communication unit 14 which starts polling communication according to the polling start request to acquire the monitoring information or the monitoring information with the terminal-side time; and a monitoring device-side memory 12 which stores the monitoring information with a monitoring device-side time, in which the monitoring device-side time when the polling start request is issued is related to the monitoring information. The monitoring information with the terminal-side time is acquired by any one of polling communications performed during the second predetermined period included in the first predetermined period.

Description

  The present invention relates to a monitoring system, a monitoring device, a program for the monitoring device, a program for the monitoring device, a program for the terminal device, and a program for acquiring monitoring information possessed by the terminal by communicating with the terminal.

  2. Description of the Related Art Conventionally, a monitoring system that performs polling communication between each terminal and the monitoring device is known in order to measure data by a plurality of terminals and for the monitoring device to acquire the measured data (the following patents) References 1 and 2).

  Patent Document 1 describes that a variable-length small period T2 for repeating polling for a specific terminal is interrupted and superimposed within a variable-length one-cycle period T1 in which polling for all terminals is completed.

  In Patent Document 2, a timing generation unit that outputs a timing signal at a predetermined cycle, a setting unit that sets transmission contents for a desired terminal, polling a plurality of terminals in order, receive data, and a timing signal A communication processing unit that transmits the transmission content to a desired terminal based on the communication terminal, and when the timing signal is input, the communication processing unit may interrupt polling to the next terminal and transmit the transmission content. Are listed.

JP 05-007383 A JP 2004-295745 A

  It is desired to ensure the real-time property of measurement data (monitoring information) acquired from a terminal in the monitoring system described above. For this reason, it is conceivable that the terminal stores the acquired measurement data with a time information label indicating the acquisition time of the measurement data, and collects the data with the acquisition time by the monitoring device.

  However, when there are a plurality of types of measurement data for which real-time property is to be ensured, the terminal needs to store a plurality of pieces of data with time information in the storage unit, and needs to increase the capacity of the necessary storage unit.

  On the other hand, it is conceivable that the monitoring device collects the measurement data, stores it with a time information label. However, in the method of performing polling communication with terminals in a predetermined order, it may take a long communication processing time for the monitoring device to perform polling communication with all terminals, and when multiple types of measurement data are acquired from multiple terminals However, there is a possibility that real-time property cannot be secured.

  Therefore, the present invention has been proposed in view of the above-described situation, and even when a plurality of types of monitoring information is acquired from a plurality of terminals, a monitoring system that can ensure the real-time property of each monitoring information, It is an object of the present invention to provide a monitoring device, a monitoring device program, a terminal device, and a terminal device program.

  A monitoring system according to a first invention that solves the above-described problem is a monitoring system in which a plurality of terminals and a monitoring device are communicably connected, and the monitoring information held by the terminal by polling communication performed by the monitoring device with the terminal The terminal is a terminal-side communication unit that performs polling communication with the monitoring device according to a polling signal transmitted from the monitoring device, a terminal-side clock unit that acquires a terminal-side time, Monitoring information acquisition unit for acquiring monitoring information, monitoring with terminal side time that associates the monitoring information acquired by the monitoring information acquisition unit every first predetermined period with the terminal side time acquired by the terminal side clock unit And a terminal-side storage unit that stores information, and the monitoring device acquires a monitoring device-side time and issues a polling start request every second predetermined period shorter than the first predetermined period. A monitoring device side clock unit, a monitoring device side communication unit that starts polling communication in accordance with the polling start request and acquires the monitoring information or the terminal side timed monitoring information from the terminal, and the polling start request is issued A monitoring device side storage unit that stores monitoring device side time-attached monitoring information that associates the monitoring device side time when the monitoring device side communication unit acquires the monitoring information acquired by the monitoring device side communication unit, The terminal-side timed monitoring information is acquired by any one of polling communications in a second predetermined period included in the first predetermined period.

  The monitoring system according to the first aspect is the monitoring system according to the second aspect, wherein the monitoring device storage unit stores monitoring item attribute information indicating an attribute of the monitoring item of the terminal by the monitoring device communication unit. And a schedule creation unit for assembling a polling schedule indicating the polling order of the terminals based on the monitoring item attribute information, wherein the monitoring device side communication unit performs polling communication according to the polling schedule created by the schedule creation unit It is characterized by performing.

  A monitoring system according to the second invention, wherein the third invention is a data state for examining a missing state of the terminal-side timed monitoring information acquired by the monitoring device-side communication unit and stored in the monitoring device-side storage unit The schedule creation unit may further include an acquisition unit, and the schedule creation unit may request the terminal for time-based monitoring information with time missing from the terminal based on the missing information checked by the data state acquisition unit. The polling schedule is created so as to acquire the terminal-side monitoring information with time when the terminal is not exceeded.

The monitoring system according to a third aspect of the present invention is the monitoring system according to the fourth aspect, wherein the terminal has the number of terminal-side timed monitoring information as an item of the terminal-side timed monitoring information, A polling schedule is created by using the number of monitoring information with time on the terminal side as monitoring information having a lower priority than the monitoring information associated with the monitoring device side time.
The monitoring system according to the second invention, wherein the fifth invention has a higher priority than the monitoring information with time on the terminal side when an interrupt request for requesting monitoring information occurs to the monitoring device. It is characterized in that polling communication is performed in response to an interrupt request by waiting until the polling communication for obtaining monitoring information is completed.

  The monitoring system according to a second aspect is the monitoring system according to the sixth aspect, wherein the schedule creation unit monitors the terminal-side time as monitoring information having a lower priority than the monitoring information associated with the monitoring device-side time. Information necessary to synchronize with the device side time is set to determine a polling order, and the monitoring device side communication unit is necessary to synchronize the terminal side time with the monitoring device side time in the polling order. Information is transmitted to the terminal.

  A monitoring device according to a seventh invention for solving the above-described problem is a monitoring device that is communicably connected to a plurality of terminals and collects monitoring information of the terminal by polling communication performed with the terminals. A monitoring device side clock unit that obtains a monitoring device side time and issues a polling start request every second predetermined period shorter than a first predetermined period in which the terminal acquires monitoring information; and polling communication according to the polling start request The monitoring device side communication unit for acquiring the monitoring information with the terminal side time associated with the monitoring information or the monitoring information from the terminal, and the monitoring device when the polling start request is issued A monitoring device side storage unit that stores monitoring information with a monitoring device side time that associates the monitoring time acquired by the monitoring device side communication unit with a side time, Serial monitor side communication unit, and acquires the terminal-side time with monitoring information by either polling communication among the polling communication at the second predetermined period included within the first predetermined period.

  A monitoring apparatus program according to an eighth aspect of the present invention for solving the above-described problem is provided by a monitoring apparatus that is communicably connected to a plurality of terminals and collects monitoring information of the terminals by polling communication with the terminals. A program to be executed, which obtains a monitoring apparatus side time, issues a polling start request every second predetermined period shorter than a first predetermined period in which the terminal acquires monitoring information, and Monitoring device when the polling start request is issued by starting polling communication in accordance with the polling start request, obtaining the monitoring information with the terminal side time associated with the monitoring information or the monitoring information from the terminal, and issuing the polling start request Monitoring information with time on the monitoring device side that associates the monitoring time with the monitoring time is stored in the storage unit, and the second predetermined period included in the first predetermined period To perform the obtaining the terminal side time with monitoring information by either polling communication among the polling communication.

  A terminal device according to a ninth invention for solving the above-mentioned problems is a terminal device that is communicably connected to a monitoring device and transmits monitoring information by polling communication with the monitoring device, wherein the monitoring device A terminal-side communication unit that performs polling communication with the monitoring device according to the polling signal transmitted from the terminal, a terminal-side clock unit that acquires the terminal-side time, a monitoring information acquisition unit that acquires the monitoring information, and a first predetermined period A terminal-side storage unit that stores monitoring information with terminal-side time that associates the monitoring information acquired by the monitoring-information acquiring unit with the terminal-side time acquired by the terminal-side clock unit, and the terminal side The communication unit is included in the first predetermined period, and is stored in the terminal-side storage unit by any polling communication among the polling communication of the second predetermined period shorter than the first predetermined period. It transmits the terminal-side time with monitoring information, and transmits the monitoring information by other polling communication.

  A terminal device program according to a tenth invention for solving the above-described problem is a terminal device program that is communicably connected to a monitoring device and transmits monitoring information by polling communication with the monitoring device. The terminal device stores terminal-side time-attached monitoring information in which the monitoring information is associated with the terminal-side time every first predetermined period in the terminal-side storage unit, and the monitoring device according to the polling signal transmitted from the monitoring device Is stored in the terminal-side storage unit by any one of the polling communications included in the first predetermined period and shorter than the first predetermined period. The monitoring information with time on the terminal side is transmitted, and the monitoring information is transmitted by other polling communication.

  According to the present invention, since the monitoring device acquires the monitoring information with the terminal-side time by any one of the polling communications in the second predetermined period included in the first predetermined period, it polls a plurality of types of monitoring information. Even when the monitoring device wants to acquire through communication, monitoring information that requires high real-time performance can be acquired as monitoring information with time on the terminal side. Thereby, this invention can ensure the real-time property of each monitoring information.

It is a block diagram which shows the structure of the monitoring system shown as one Embodiment of this invention. It is a block diagram which shows the other structure of the monitoring system shown as one Embodiment of this invention. It is a figure which shows the polling schedule in the monitoring system shown as one Embodiment of this invention, (a) is the polling order for 3N, (b) is the polling order for 3N + 1, (c) is the polling order for 2 minutes, ( d) is the polling order of 3N + 2 minutes. It is a sequence diagram of the polling communication process according to a polling schedule in the monitoring system shown as one Embodiment of this invention, (a) is a polling sequence for 3N, (b) is a polling sequence for 3N + 1, (c) is 2 (D) is a polling sequence of 3N + 2 minutes. It is a flowchart which shows the process sequence which performs a complementary polling communication process by the monitoring apparatus in the monitoring system shown as one Embodiment of this invention. In the monitoring system shown as one Embodiment of this invention, it is a sequence diagram of the polling communication process performed by a complementary polling communication process. It is a figure which shows the polling schedule in the monitoring system shown as one Embodiment of this invention, (a) is the polling order of 3N + 2 minutes, (b) is the polling order of 59 minutes. It is a sequence diagram of the polling communication process according to a polling schedule in the monitoring system shown as one Embodiment of this invention, (a) is a 3N + 2 minute polling sequence, (b) is a 59 minute polling sequence. In the monitoring system shown as one Embodiment of this invention, it is a figure which shows the state of the measurement data with a terminal side time memorize | stored in the monitoring apparatus. In the monitoring system shown as one Embodiment of this invention, it is a figure which shows the state of the measurement data with a terminal side time memorize | stored in the terminal. It is a flowchart which shows the process sequence when the interruption request generate | occur | produces in the monitoring system shown as one Embodiment of this invention. It is a figure which shows the polling schedule in the monitoring system shown as one Embodiment of this invention, (a) is the sequence of the polling communication process of the interrupt polling communication process when polling communication of high priority data, (b) is It is a sequence of polling communication processing of interrupt polling communication processing when polling communication is performed for data other than high priority data. In the monitoring system shown as one Embodiment of this invention, it is a sequence diagram which transmits the information for synchronizing terminal side time with monitoring side time.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the monitoring system shown as an embodiment of the present invention is a monitoring device 10 and a plurality of terminals 20A, 20B, 20C,... (Hereinafter simply referred to as “terminal 20” when collectively referred to). Are communicably connected via the network NW. This monitoring system collects measurement data (monitoring information) acquired by the terminal 20 by the monitoring device 10. For this reason, each terminal 20 has measurement data, and the monitoring apparatus 10 performs polling communication with each terminal 20.

  The measurement data collected by this monitoring system is data for which real-time properties are desired to be ensured. The real time property is better as the actual time when the measurement data is acquired matches the time information added to the measurement data.

  The measurement data for which the real-time property is to be ensured is, for example, the amount of electric power measured every first predetermined period A, or the instantaneous value such as the accumulated electric energy, electric power, current, voltage measured every second predetermined period B, etc. Is mentioned. Here, the first predetermined period A may be a time unit, a daily unit, or a monthly unit. In addition, the second predetermined period B may be a unit shorter than the first predetermined period A.

  Among the measurement data, the period measurement data that is the amount of electric power in hour units and monthly units is related to charging using the electric power amount. Therefore, the period measurement data is required to have very high real-time accuracy. On the other hand, instantaneous measurement data of instantaneous values such as voltage is used for monitoring equipment operation including the terminal 20 and for detailed analysis of energy saving. For this reason, a certain amount of real-time property is also required for instantaneous measurement data. That is, the instantaneous measurement data of the instantaneous value such as the voltage is sufficient for the real-time property lower than the real-time property required for the period measurement data such as hourly or monthly electric energy.

  Further, the data to be polled communication includes operation parameter information, error information, and operation state information related to measurement by the terminal 20. For example, in the case of the terminal 20 that performs power measurement, the operation parameter information includes information such as a phase wire type and a sensor type. The error information is information for identifying a hardware abnormality of the terminal 20 or an operation parameter setting abnormality. The operation state information includes the terminal side time and the measurement state. These data are required to have the same real time property as the instantaneous measurement data.

  Terminals 20A, 20B, 20C,... Are terminal side communication units 21A, 21B, 21C,..., Terminal side measurement units 22A, 22B, 22C,. ..., terminal side clock parts 24A, 24B, 24C, ... are included. The terminal side communication units 21A, 21B, 21C,... Are simply referred to as “terminal side communication unit 21” when collectively referred to. The terminal side measurement units 22A, 22B, 22C,... Are simply referred to as “terminal side measurement unit 22” when collectively referred to. The terminal side storage units 23A, 23B, 23C,... Are simply referred to as “terminal side storage unit 23” when collectively referred to. The terminal clock units 24A, 24B, 24C,... Are simply referred to as “terminal clock unit 24” when collectively referred to.

  The terminal 20 is a computer including a storage unit, a communication I / F circuit, a CPU, and a program, and the CPU executes the program. Thereby, as will be described later, the program of the terminal 20 executes a procedure of acquiring monitoring information, performing polling communication, and transmitting the monitoring information.

  The terminal side measurement unit 22 is, for example, a measurement device or a sensor that measures instantaneous measurement data such as an accumulated power amount, a power value, a voltage value, a current value, a power factor value, a temperature value, and a humidity value. The terminal-side measurement unit 22 includes a measurement device that measures period measurement data such as the amount of power accumulated in the first predetermined period A. Note that the terminal-side measuring unit 22 may only be connected to a sensor or a measuring device.

  The terminal 20 acquires the period measurement data acquired by the terminal-side measurement unit 22 at the timing of the first predetermined period A measured by the terminal-side clock unit 24. When the period measurement data is acquired by the terminal-side measurement unit 22, the terminal-side storage unit 23 stores the period measurement data and the acquired terminal-side time in association with each other as measurement data with terminal-side time.

  The terminal side communication unit 21 performs polling communication with the monitoring apparatus 10 via the network NW. The terminal side communication unit 21 receives the polling signal transmitted from the monitoring device 10. Thereafter, the terminal-side communication unit 21 acquires instantaneous measurement data or measurement data with terminal-side time. At this time, the terminal-side communication unit 21 acquires the instantaneous measurement data acquired by the operation of acquiring the terminal-side timed measurement data stored in the terminal-side storage unit 23 or the terminal-side measurement unit 22, and the monitoring device 10. Send to.

  Such a terminal 20 attaches a terminal-side time to the period measurement data and stores it in the terminal-side storage unit 23 as measurement data with a terminal-side time. On the other hand, the terminal 20 attaches time information to the instantaneous measurement data and does not store it in the terminal-side storage unit 23.

  In the monitoring device 10, a monitoring storage unit 12, a monitoring clock unit 13, and a monitoring communication unit 14 are connected to the processing unit 11. The monitoring device 10 is a computer including a storage unit, a communication I / F circuit, a CPU, and a program, and the CPU executes the program. As a result, the program of the monitoring device 10 causes the monitoring information to be acquired and stored by polling communication described later.

  The monitoring clock unit 13 acquires the monitoring time information and issues a polling start request every second predetermined period B shorter than the first predetermined period A in the monitoring device 10. This polling start request is supplied to the monitoring communication unit 14.

  The monitoring side communication unit 14 starts polling communication in accordance with the polling start request and transmits a polling signal to the terminal 20. Thereafter, the monitoring-side communication unit 14 acquires terminal-side timed measurement data including instantaneous measurement data or period measurement data from the terminal 20 that has transmitted the polling signal.

  When the instantaneous measurement data is acquired by the monitoring side communication unit 14, the terminal side storage unit 23 associates the monitoring side time when the polling start request is issued with the instantaneous measurement data, and the measurement data with the monitoring side time is obtained. Remember as. Moreover, when the terminal side timed measurement data including the period measurement data is acquired by the monitoring side communication unit 14, the terminal side storage unit 23 stores the terminal side timed measurement data as it is.

  The monitoring device 10 acquires measurement data with time on the terminal side by any one of the polling communications in the second predetermined period B included in the first predetermined period A. Thereby, this monitoring system can realize the real-time property of the two measurement data for each long first predetermined period A and each second predetermined period B shorter than the first predetermined period A at low cost.

  For example, the measurement data can be labeled with time information in minutes on the monitoring device 10 side and in time units on the terminal 20 side. Here, since the measurement data is acquired by the terminal 20, the real time property of the measurement data is higher when the time information is attached to the measurement data by the terminal 20. However, if the terminal-side time is attached to all types of measurement data and stored in the terminal-side storage unit 23, the terminal-side storage unit 23 requires a large storage capacity.

  Therefore, in this monitoring system, the terminal side time is given by the terminal 20 to the measurement data that requires high real-time property, and the monitoring side time is given by the monitoring device 10 to the measurement data that does not require much real-time property. Therefore, even when the monitoring apparatus 10 wishes to acquire a plurality of types of measurement data by polling communication, the real-time property of each measurement data can be ensured.

  Further, according to this monitoring system, since the instantaneous measurement data is not stored in the terminal-side storage unit 23, each terminal 20 can be made inexpensive.

  Next, in the above-described monitoring system shown as an embodiment of the present invention, a description will be given of the addition of a function for creating a polling schedule indicating the polling order based on the monitoring item attribute information of the terminal 20 by the monitoring device 10. As shown in FIG. 2, the monitoring system includes a data state acquisition unit 15, an external communication unit 16, and a schedule creation unit 17 in the monitoring device 10. The monitoring device 10 is also a computer including a storage unit, a communication I / F circuit, a CPU, and a program, and the CPU executes the program. As a result, the program of the monitoring device 10 causes the monitoring information to be acquired and stored by polling communication described later.

  The monitoring item attribute information is stored in the monitoring storage unit 12. The monitoring item attribute information indicates the attribute of the monitoring item of the terminal 20. The monitoring item attribute information includes, for example, terminal information (1, 2, 3,...) Of the terminal 20 to be monitored and the type of the terminal 20. The type of the terminal 20 includes identification information indicating that it is a power measurement terminal that measures period measurement data, identification information that it is a power measurement terminal that does not measure period measurement data, identification information that it is a temperature and humidity measurement terminal, and the like. Including.

  The schedule creation unit 17 assembles a polling schedule indicating the polling order of the terminal 20 based on the monitoring item attribute information. Then, the monitoring communication unit 14 in the monitoring device 10 performs polling communication according to the polling schedule created by the schedule creation unit 17.

  Specifically, the schedule creation unit 17 creates a polling schedule as shown in FIG. 3, and the monitoring apparatus 10 performs polling communication as shown in FIG.

  The schedule creation unit 17 of the monitoring device 10 assigns instantaneous measurement data such as a power value for ensuring the real-time property for each second predetermined period B in units of 1 minute as high priority data. On the other hand, the processing unit 11 of the terminal 20 assigns the period measurement data (measurement data with time on the terminal side) that secures the real-time property of the first predetermined period A in units of one hour as low priority data. In addition, the processing unit 11 of the terminal 20 assigns the operation parameter information, error information, and operation state information of the terminal 20 itself as other monitoring data as low priority data. In FIG. 4, the measurement data with time on the terminal side that secures the real-time property by the terminal 20 is represented by low priority data D.

  And the schedule preparation part 17 of the monitoring apparatus 10 schedules a polling order so that high priority data may be acquired preferentially within the 2nd predetermined period B over the whole polling schedule. In addition, the schedule creation unit 17 schedules the polling order so as to acquire the low priority data by any one of the polling communications in the second predetermined period B included in the first predetermined period A.

  Here, the schedule creation unit 17 schedules the terminal 20 to acquire the data (including the measurement data with time on the terminal side) that secures the real-time property at least once within the first predetermined period A. In addition, the polling order schedule is assembled in consideration of the number and number of terminals 20 monitored by the monitoring device 10 (5 in the example of FIG. 3, 1 to 5) and the type of the terminal 20.

  Thereby, as shown in FIG. 3, polling communication is performed in the order of (a), (b), (c), and (d) every second predetermined period B.

  First, in the period of the second predetermined period B starting from 3N minutes (N = 0, 1,..., 19), polling communication is performed as shown in FIGS. 3 (a) and 4 (a). In this polling communication, a polling signal is sequentially sent from the monitoring device 10 to the terminals 20 having the terminal numbers 1 to 5 in order to acquire the high priority data A1 to A5 which are instantaneous measurement data such as power according to the polling order 1 to 5. Send. Thereby, the monitoring apparatus 10 can acquire the high priority data A1 to A5 from the terminals 20 having the terminal numbers 1 to 5. Thereafter, in the polling communication in which the polling order is 6 to 10, in order to obtain the low priority data B1 to B5 which are the operation parameter information of the terminal 20, the monitoring apparatus 10 sequentially polls the terminals 20 having the terminal numbers 1 to 5. Send a signal. Thereby, the monitoring apparatus 10 can acquire the low priority data B1 to B5 from the terminals 20 having the terminal numbers 1 to 5. The monitoring device 10 adds the monitoring time when issuing the polling start request for acquiring the high priority data A1 to A5 and the low priority data B1 to B5, and stores them in the monitoring storage unit 12.

  In the period of the second predetermined period B starting from the next 3N + 1 minutes (N = 0, 1,..., 19), polling communication is performed as shown in FIGS. 3 (b) and 4 (b). In this polling communication, a polling signal is sequentially sent from the monitoring device 10 to the terminals 20 having the terminal numbers 1 to 5 in order to acquire the high priority data A1 to A5 which are instantaneous measurement data such as power according to the polling order 1 to 5. Send. Thereby, the monitoring apparatus 10 can acquire the high priority data A1 to A5 from the terminals 20 having the terminal numbers 1 to 5. Thereafter, in the polling communication in which the polling order is 6 to 10, in order to acquire the low priority data C1 to C5 which are the error information and the operation state information of the terminal 20, the terminals 20 having the terminal numbers 1 to 5 from the monitoring device 10 A polling signal is transmitted sequentially. Thereby, the monitoring apparatus 10 can acquire the low priority data C1 to C5 from the terminals 20 having the terminal numbers 1 to 5. The monitoring device 10 adds the monitoring time when issuing the polling start request for acquiring the high priority data A1 to A5 and the low priority data C1 to C5, and stores them in the monitoring storage unit 12.

  In the period of the second predetermined period B starting from the next two minutes, polling communication is performed as shown in FIGS. 3 (c) and 4 (c). In this polling communication, a polling signal is sequentially sent from the monitoring device 10 to the terminals 20 having the terminal numbers 1 to 5 in order to acquire the high priority data A1 to A5 which are instantaneous measurement data such as power according to the polling order 1 to 5. Send. Thereby, the monitoring apparatus 10 can acquire the high priority data A1 to A5 from the terminals 20 having the terminal numbers 1 to 5. Thereafter, in the polling communication in which the polling order is 6 to 10, in order to obtain the low priority data D1 to D5 which are the measurement data with time on the terminal side of the terminal 20, the terminals 20 having the terminal numbers 1 to 5 from the monitoring device 10 A polling signal is transmitted sequentially. Thereby, the monitoring apparatus 10 can acquire the low priority data D1 to D5 from the terminals 20 having the terminal numbers 1 to 5. The monitoring apparatus 10 adds the monitoring time when issuing the polling start request for acquiring the high priority data A1 to A5 and stores the monitoring time in the monitoring storage unit 12. On the other hand, the monitoring device 10 stores the low-priority data D in the monitoring-side storage unit 12 as it is because the terminal-side time is attached.

  In the period of the second predetermined period B starting from the next 3N + 2 minutes (N = 1,..., 19), polling communication is performed as shown in FIGS. 3 (d) and 4 (d). In this polling communication, a polling signal is sequentially sent from the monitoring device 10 to the terminals 20 having the terminal numbers 1 to 5 in order to acquire the high priority data A1 to A5 which are instantaneous measurement data such as power according to the polling order 1 to 5. Send. Thereby, the monitoring apparatus 10 can acquire the high priority data A1 to A5 from the terminals 20 having the terminal numbers 1 to 5. The monitoring apparatus 10 adds the monitoring time when issuing the polling start request for acquiring the high priority data A1 to A5 and stores the monitoring time in the monitoring storage unit 12.

  As described above, according to this monitoring system, from the monitoring item attribute information, the instantaneous measurement data is set as high priority data and the period measurement data is set as low priority data to schedule the polling order. Thereby, the monitoring system can improve the real-time property of instantaneous measurement data.

  Moreover, the monitoring system does not need to ensure the real-time property of the instantaneous measurement data at the terminal 20. Therefore, according to this monitoring system, since it is not necessary to store the time of the instantaneous measurement data, it is not necessary to increase the capacity of the terminal-side storage unit 23 of the terminal 20, and the real-time property of a plurality of types of measurement data is ensured. System can be realized at low cost.

  Next, in the monitoring system described above, a description will be given of what recovers the loss of the measurement data with terminal side time in the monitoring device 10.

  This monitoring system will be described in which the data state acquisition unit 15 of the monitoring device 10 checks the missing state of the terminal-side timed measurement data acquired by the monitoring communication unit 14 and stored in the monitoring storage unit 12. Then, the schedule creation unit 17 creates a polling schedule based on the missing information examined by the data state obtaining unit 15 so as to obtain missing terminal side timed measurement data. At this time, the schedule creation unit 17 acquires the missing terminal-side timed measurement data when the terminal 20 is requested to receive the missing terminal-side timed measurement data but does not exceed the first predetermined period A. Create a polling schedule to

  The data state acquisition unit 15 arranges the terminal-side timed measurement data stored in the monitoring-side storage unit 12 in time series, and when there is no terminal-side timed measurement data substantially every first predetermined period A, It is determined that the measurement data with time on the terminal side in the period is missing. A case where the measurement data with time on the terminal side is lost includes a case where polling communication cannot be performed due to a power failure, communication interruption, or the like. In this case, the schedule creation unit 17 creates a polling schedule so as to acquire missing measurement data with time on the terminal side.

  At this time, as illustrated in FIG. 5, when the processing unit 11 issues a polling schedule processing start request for creating a polling schedule, the monitoring device 10 starts the processing from step S <b> 1 onward. This polling schedule process is performed once within the second predetermined period B.

  In step S <b> 1, the schedule creation unit 17 assigns a polling order to each of the high priority data and the low priority data corresponding to the type of the terminal 20 that needs to be periodically acquired. Then, when the allocation of the polling order is determined for all the high priority data and low priority data that need to be acquired regularly, it is determined that the creation of the polling schedule is completed, and the polling schedule processing is completed. Is determined.

  Thereafter, before the next polling schedule processing start request is issued (step S3: NO), the schedule creation unit 17 stores the terminal side timed measurement data (missing data) that is missing in the monitoring storage unit 12. It is determined whether or not there is. That is, it is determined whether it is within the second predetermined period B from the end of the previous second predetermined period B.

  At this time, if the data state acquisition unit 15 determines that there is missing data in the monitoring-side storage unit 12, the schedule creation unit 17 performs complementary polling communication processing for complementing the missing data in step S5. This supplemental polling communication processing is performed when the schedule creation unit 17 requests the missing measurement data with the terminal side time from the terminal 20 even if it does not exceed the second predetermined period B, with the missing terminal side time. Create a polling schedule to obtain measurement data. That is, polling communication is performed by adding a polling order for acquiring missing data to an existing polling schedule.

  This complementary polling communication processing is repeated until it is determined in step S3 that there is no missing data, not the time of the next polling schedule processing in step S3. If a start request for the next polling schedule process is generated in step S3 (step S3: YES), the process is returned to step S1 and subsequent steps.

  As a result, as shown in FIG. 6, when the terminal side timed measurement data Dx in a certain first predetermined period A is not stored in the monitoring device 10, the missing terminal in the free time in the second predetermined period B Polling communication is performed to acquire measurement data with side time.

  As described above, according to this monitoring system, when the terminal-side timed measurement data is missing, the missing terminal-side timed measurement data can be acquired unless the second predetermined period B is exceeded. . Thereby, the measurement data with the terminal side time lost in the past in the margin time within the second predetermined period B can be acquired.

  Next, in the above-described monitoring system shown as the embodiment of the present invention, a description will be given of what restores the loss of the measurement data with time on the terminal side as much as possible.

  In this monitoring system, the terminal 20 has the number of measurement data with terminal-side time as an item of measurement data with terminal-side time. And the schedule preparation part 17 of the monitoring apparatus 10 produces a polling schedule as the measurement data with a lower priority than the measurement data linked | related with the monitoring time with the possession number of the measurement data with a terminal side time. This polling schedule is, for example, as shown in FIG. Further, the terminal 20 is substantially the same even if it has a holding period, not a holding number.

  As shown in FIGS. 7A and 8A, this monitoring system sequentially transmits a polling signal from the monitoring device 10 to the terminals 20 having the terminal numbers 1 to 5 in the second predetermined period B of 3N + 2. To do. Thereby, the monitoring apparatus 10 can acquire the high priority data A1 to A5 from the terminals 20 having the terminal numbers 1 to 5.

  Thereafter, as shown in FIGS. 7B and 8B, the high priority data is sent from the monitoring device 10 to the terminals 20 having the terminal numbers 1 to 5 in 59 minutes before the first predetermined period A expires. A polling signal for acquiring A1 to A5 is sequentially transmitted. Next, the monitoring apparatus 10 sequentially transmits a polling signal for obtaining the period measurement data holding numbers E1 to E5 to the terminals 20 having the terminal numbers 1 to 5. Thereby, the monitoring apparatus 10 can acquire the holding numbers E1 to E5 of the period measurement data from the terminals 20 having the terminal numbers 1 to 5.

  In such a monitoring system, the monitoring device 10 determines whether or not missing data can be acquired from the terminal 20 from the number of holding period measurement data E1 to E5 during the complementary polling communication in step S5 of FIG. 5 described above. . When the missing measurement data with time on the terminal side is within the holding period corresponding to the number of holdings acquired from the terminal 20, the monitoring device 10 acquires the missing data by the complementary polling communication process. On the other hand, the monitoring device 10 does not perform the complementary polling communication processing when the missing measurement data with time on the terminal side is not within the holding period corresponding to the holding number acquired from the terminal 20.

  Specifically, as shown in FIG. 9, it is assumed that the measurement data with terminal side time is stored in the storage area of the measurement data with terminal side time in the monitoring side storage unit 12. According to FIG. 9, the monitoring-side storage unit 12 needs to store measurement data with terminal side time at 23:00 on X + 2 day from measurement data with terminal side time at 0:00 on X day. However, as indicated by a circle in FIG. 9, the monitoring-side storage unit 12 stores only the terminal-side timed measurement data at X + 2 day 0 o'clock from the period terminal-side timed measurement data at X + 2 day 23:00. In this situation, the data state acquisition unit 15 determines that the data from the terminal-side timed measurement data at 0:00 X day to the terminal-side timed measurement data at X + 1 day 23:00 is missing data.

  On the other hand, as indicated by the circles in FIG. 10, only the terminal-side timed measurement data at X + 1 day 0 o'clock is stored in the terminal 20 from the period terminal-side timed measurement data at X + 2 day 23:00. Thus, the measurement data with time on the terminal side before 0:00 on the X + 1 day is not stored. The cause of the measurement data with terminal-side time not being stored includes a power failure and an operation error.

  In such a situation, the terminal 20 updates the number of measurement data with end-side time each time it stores measurement data with terminal-side time in the terminal-side storage unit 23. The number of possessed measurement data with time on the terminal side is acquired by the monitoring device 10 through polling communication by the monitoring device 10. Thereby, the monitoring device 10 can acquire and restore only the measurement data with the terminal side time at X + 1 day 0 o'clock by the supplemental polling communication process from the measurement data with the terminal side time at 2 o'clock X + 1 from the possession number of the terminal 20. Can be judged. In other words, the monitoring device 10 performs complementary polling communication processing on the measurement data with terminal side time from X 23:00 to X 0 0:00 which is not stored in the terminal side storage unit 23 of the terminal 20 among the missing data. However, the supplemental polling communication process is not performed because it cannot be recovered.

  As described above, according to this monitoring system, since the measurement data with the terminal side time stored in the terminal 20 can be grasped by the monitoring device 10, the measurement data with the terminal side time not stored in the terminal 20 is acquired. Complementary polling communication processing can be avoided. Therefore, according to this monitoring system, it is possible to reduce the communication loss of the complementary polling communication processing and to recover the loss of the measurement data with the terminal side time in a short time.

  Next, in the above-described monitoring system shown as an embodiment of the present invention, what deals with the occurrence of an interrupt request from the outside to the monitoring device 10 will be described.

  In this monitoring system, when an interrupt request for requesting measurement data to the monitoring device 10 is generated, until the polling communication for obtaining high priority data having higher priority than the measurement data with time on the terminal side ends. Wait for polling communication in response to an interrupt request. In this monitoring system, an external system 30 is connected to the monitoring device 10 as shown in FIG. The external system 30 requests information from the terminal 20, and examples thereof include a host system operated by the host system and the user with respect to the monitoring device 10. For example, when the terminal 20 is a power meter or sensor of equipment owned by the user, a request for transmitting the state of the terminal 20 is generated by the portable terminal owned by the user and supplied to the monitoring device 10.

  The monitoring device 10 includes an external communication unit 16 connected to the external system 30. The external communication unit 16 is set for communication so that it can communicate with the external system 30. As shown in FIG. 11, when the monitoring device 10 receives a request from the external system 30 by the external communication unit 16, the monitoring device 10 generates an interrupt for polling communication, and performs the processing after step S <b> 11.

  In step S <b> 11, the processing unit 11 refers to the polling schedule created by the schedule creation unit 17 and determines whether or not the current polling schedule processing for acquiring high priority data is in progress. When polling schedule processing for acquiring high priority data is being performed, polling communication processing for an interrupt is awaited. If it is not a polling schedule process for acquiring high priority data, the process proceeds to step S12.

  In step S <b> 12, the processing unit 11 determines whether or not the polling communication process for each terminal 20 for periodically acquiring the low priority data has been completed. Further, the processing unit 11 determines whether or not the polling communication process for each terminal 20 for acquiring the low priority data is completed by the above-described complementary polling communication process. If any determination is affirmative (step S12: YES), the process proceeds to step S13.

  In the next step S13, the monitoring apparatus 10 performs an interrupt polling communication process for acquiring information of the terminal 20 in response to the interrupt request. At this time, the monitoring-side communication unit 14 acquires information of the terminal 20 by transmitting a polling signal so as to acquire the terminal 20 and the type of information indicated by the interrupt request.

  In the next step S <b> 13, the monitoring apparatus 10 performs a response process of transmitting the information of the terminal 20 acquired by the interrupt polling communication process to the external system 30 that has issued the interrupt request by the external communication unit 16.

  According to such a monitoring system, specifically, the operation shown in FIG. 12 is performed.

  As shown in FIG. 12A, when the polling schedule process for acquiring the high priority data is not being performed, the polling communication process corresponding to the request from the external system 30 is performed in the next polling order. For example, it is assumed that the external communication unit 16 acquires a request for acquiring the low priority data D1 of the terminal 20 whose terminal number is 1 from the external system 30 during the polling communication process for acquiring the low priority data B3. In this case, the external communication unit 16 generates an interrupt request and performs polling communication processing for acquiring the low priority data D1 prior to the low priority data B4 in the next polling order.

  On the other hand, as shown in FIG. 12B, when the polling schedule process for acquiring the high priority data is being performed, after the polling communication process of the high priority data A1 to A5 is completed, Perform polling communication processing according to the request. For example, it is assumed that the external communication unit 16 acquires a request for acquiring the low priority data D1 of the terminal 20 whose terminal number is 1 from the external system 30 during the polling communication process for acquiring the high priority data A3. In this case, the external communication unit 16 generates an interrupt request and replaces the low priority data B1 in the polling order with the low priority in the next polling order after the polling communication processing of the high priority data A1 to A5 is completed. A polling communication process for acquiring the data D1 is performed.

  As described above, according to this monitoring system, when an interrupt occurs during polling communication processing for acquiring high priority data, polling communication processing corresponding to the interrupt is performed until the polling communication processing ends. Not performed. Therefore, according to this monitoring system, even when an interrupt occurs, polling communication processing for the interrupt can be performed while ensuring the real-time property of the high priority data.

  Next, in the monitoring system described above, a description will be given of synchronizing the terminal-side time measured by the plurality of terminals 20 and the monitoring-side time counted by the monitoring device 10.

  In this monitoring system, the schedule creation unit 17 sets information necessary for synchronizing the terminal-side time with the monitoring-side time as low-priority data having a lower priority than the high-priority data, and determines the polling order. . Then, the monitoring device 10 transmits information necessary for synchronizing the terminal-side time to the monitoring-side time by the monitoring-side communication unit 14 in the polling order set as the low priority data. Information necessary for this synchronization includes a time obtained by adding a communication time for transmitting a polling signal and a delay time corresponding to the polling order to the terminal-side time.

  The schedule creation unit 17 of the monitoring device 10 determines a polling order for transmitting T1 to T5 as low priority data necessary for time synchronization in the polling schedule. At this time, for example, as illustrated in FIG. 3, the schedule creation unit 17 schedules to transmit T1 to T5 as low priority data after the high priority data. That is, it schedules T1-T5 as low priority data to be transmitted in the idle time during which high priority data is not transmitted. As a result, as shown in FIG. 13, T1 to T5 as low priority data are sequentially transmitted to the terminals 20 having terminal numbers 1 to 5 in the next polling order of the high priority data A1 to A5. And the terminal 20 will synchronize the terminal side time of the terminal side clock part 24 with the monitoring side time, if T1-T5 as low priority data is received.

  As described above, according to this monitoring system, information necessary for time synchronization between the monitoring device 10 and the terminal 20 can be performed in a margin time during which high priority data is not transmitted. Therefore, according to this monitoring system, the error of the terminal side time between the terminals 20 can be reduced, and the accuracy of the terminal side time associated with the measurement data with the terminal side time can be further increased. Further, according to this monitoring system, it is possible to reduce the time error between the terminal-side timed measurement data stored in the monitoring-side storage unit 12 and the monitoring-side timed measurement data.

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it is possible to change.

DESCRIPTION OF SYMBOLS 10 Monitoring apparatus 11 Processing part 12 Monitoring side memory | storage part 13 Monitoring side clock part 14 Monitoring side communication part 15 Data state acquisition part 16 External communication part 17 Schedule preparation part 20 Terminal 21 Terminal side communication part 22 Terminal side measurement part 23 Terminal side memory | storage Section 24 Terminal side clock section 30 External system

Claims (10)

A monitoring system in which a plurality of terminals and a monitoring device are communicably connected, and the monitoring device collects monitoring information of the terminal by polling communication performed between the terminals,
The terminal includes a terminal-side communication unit that performs polling communication with the monitoring device according to a polling signal transmitted from the monitoring device, a terminal-side clock unit that acquires a terminal-side time, and a monitoring information acquisition unit that acquires the monitoring information A terminal-side storage unit for storing terminal-side time-attached monitoring information in which the monitoring information acquired by the monitoring information acquisition unit every first predetermined period and the terminal-side time acquired by the terminal-side clock unit are associated with each other Have
The monitoring device acquires a monitoring device side time and issues a polling start request every second predetermined period shorter than the first predetermined period, and starts polling communication according to the polling start request. The monitoring device side communication unit that acquires the monitoring information or the terminal side timed monitoring information from the terminal, the monitoring device side time when the polling start request is issued, and the monitoring device side communication unit A monitoring device-side storage unit that stores monitoring information with time associated with the monitoring device;
The monitoring system is characterized in that the monitoring device acquires the terminal-side timed monitoring information by any one of polling communications in a second predetermined period included in the first predetermined period. The monitoring device side storage unit stores monitoring item attribute information indicating an attribute of the monitoring item of the terminal by the monitoring device side communication unit,
A schedule creation unit for assembling a polling schedule indicating the polling order of the terminal based on the monitoring item attribute information;
The monitoring system according to claim 1, wherein the monitoring device side communication unit performs polling communication in accordance with the polling schedule created by the schedule creation unit. A data state acquisition unit for examining a missing state of the terminal side timed monitoring information acquired by the monitoring device side communication unit and stored in the monitoring device side storage unit;
The schedule creation unit, based on the missing information examined by the data state acquisition unit, when requesting the terminal-side monitoring information with time missing from the terminal does not exceed the second predetermined period, The monitoring system according to claim 2, wherein the polling schedule is created so as to obtain the missing terminal-side monitoring information with time. The terminal has the number of terminal-side timed monitoring information as an item of the terminal-side timed monitoring information,
The schedule creation unit creates a polling schedule with the number of monitoring information with time on the terminal side held as monitoring information having a lower priority than the monitoring information associated with the monitoring device side time. The monitoring system described in.   When an interrupt request for requesting monitoring information to the monitoring device is generated, it waits until polling communication for obtaining monitoring information having a higher priority than the monitoring information with time on the terminal side is completed and becomes an interrupt request. The monitoring system according to claim 2, wherein polling communication is performed in response. The schedule creation unit sets information necessary to synchronize the terminal side time with the monitoring device side time as monitoring information having a lower priority than the monitoring information associated with the monitoring device side time, and sets a polling order. Decide
The monitoring system according to claim 2, wherein the monitoring device side communication unit transmits information necessary for synchronizing the terminal side time to the monitoring device side time in the polling order. A monitoring device that is communicably connected to a plurality of terminals and collects monitoring information of the terminal by polling communication performed between the terminals,
A monitoring device side clock unit that acquires a monitoring device side time and issues a polling start request every second predetermined period shorter than a first predetermined period in which the terminal acquires monitoring information;
A monitoring device-side communication unit that starts the polling communication according to the polling start request and acquires the monitoring information with the terminal-side time associated with the monitoring information or the monitoring information from the terminal;
A monitoring device side storage unit that stores monitoring device side timed monitoring information that associates the monitoring device side time when the polling start request is issued with the monitoring information acquired by the monitoring device side communication unit. ,
The monitoring apparatus is characterized in that the monitoring apparatus side communication unit acquires the terminal side timed monitoring information by any one of the polling communications in the second predetermined period included in the first predetermined period. A program that is connected to a plurality of terminals in a communicable manner and that is executed by a monitoring device that collects monitoring information of the terminal by polling communication performed between the terminals,
In the monitoring device,
The monitoring device side time is acquired, and a polling start request is issued every second predetermined period shorter than the first predetermined period in which the terminal acquires monitoring information.
In accordance with the polling start request, start polling communication to acquire monitoring information with terminal side time associated with the monitoring information or the monitoring information from the terminal, and the terminal side time,
Storing monitoring information with time on the monitoring device side that associates the monitoring device side time with the monitoring information when the polling start request is issued, in the storage unit;
A program of a monitoring device for causing the terminal side timed monitoring information to be acquired by any one of polling communications in a second predetermined period included in the first predetermined period. A terminal device that is communicably connected to a monitoring device and transmits monitoring information by polling communication with the monitoring device,
A terminal-side communication unit that performs polling communication with the monitoring device according to a polling signal transmitted from the monitoring device;
A terminal-side clock that obtains the terminal-side time;
A monitoring information acquisition unit for acquiring the monitoring information;
A terminal-side storage unit that stores monitoring information with terminal-side time that associates the monitoring information acquired by the monitoring-information acquiring unit with the terminal-side time acquired by the terminal-side clock unit for each first predetermined period; And
The terminal-side communication unit is included in the first predetermined period, and is stored in the terminal-side storage unit by any one of the polling communications of the second predetermined period shorter than the first predetermined period. A terminal device that transmits the monitoring information with time on the terminal side and transmits the monitoring information by other polling communication. A program for a terminal device that is communicably connected to a monitoring device and transmits monitoring information by polling communication with the monitoring device,
In the terminal device,
Storing the terminal-side time-attached monitoring information that associates the monitoring information with the terminal-side time for each first predetermined period in the terminal-side storage unit;
One of the polling communications within the first predetermined period, which is included in the first predetermined period and shorter than the first predetermined period, performs polling communication with the monitoring apparatus according to the polling signal transmitted from the monitoring apparatus. A program for a terminal device for causing the terminal-side timed monitoring information stored in the terminal-side storage unit to be transmitted by polling communication and transmitting the monitoring information by other polling communication.

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