JP2013195149A - Measuring terminal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost measuring terminal device capable of transmitting the measured value of an electric energy amount even when a communication failure with the host system occurs.SOLUTION: A measuring terminal device 3 includes: an electric energy amount measuring part 35 that measures a voltage value and a current value on a wiring path 2 and measuring an electric energy amount; a clock part 36 that clocks a measurement start date and a lapse time of the electric energy amount obtained by the electric energy amount measuring part 35; a storage part 38 that stores, as a record, the electric energy amount, the measurement start date, and the lapse time; a record recording part 371 that records the record in the storage part 38; a communication part 39 that transmits the record stored in the storage part 38 to the host system; a record erasing part 375 that erases the record in the storage part 38, the transmission of which has finished the transmission; a remaining amount reduction detection part 372 that detects the reduction of the remaining amount of the storage part 38; and a record consolidation part 373 that consolidates a plurality of records in the storage part 38 in response to a request from the remaining amount reduction detection part 372.

Description

  The present invention relates to a measurement terminal device, and more particularly to a measurement terminal device suitable for storing measurement values in a power amount measurement terminal attached on a power supply route to a load on a wiring route of a power usage management system.

  As a watt hour meter attached to the power supply path to the load on the wiring path and displaying the amount of power supplied to the load, the voltage value and current value of the wiring path are multiplied and integrated over time (ie, integration) The thing which asks for electric energy by doing is provided.

  Patent Document 1 discloses a watt-hour meter that can calculate a power amount by multiplying a voltage value and a current value, and display the power amount of elapsed time from the start of measurement and the power amount for each unit date and time. Yes.

  Conventionally, with this type of power measurement terminal, if a communication error with the host system has occurred for a long time, the power measurement value cannot be transmitted to the host system. The data was sequentially stored in the storage area in the terminal.

  After that, when the remaining amount of storage in the energy measurement terminal runs out, processing such as deleting from the old record is performed to secure the remaining storage space, and then a new record is recorded. It was. In other words, when a communication error or the like with the host system occurs, the current state is that the old measurement data of the electric energy is discarded.

JP 2000-162252 A

  However, when the power amount measurement value data is discarded, for example, when the power amount measurement value record is a measurement value in units of one minute, one or more power amount measurement value records are discarded. In this case, for example, the data of the measurement value of the electric energy in an hour unit including the discarded record becomes incomplete, the electric energy cannot be measured correctly, and the proper electric power consumption can be grasped. There is a problem that it cannot be used and cannot be used in subsequent comparison and statistical processing.

  It is also possible to increase the capacity of the storage area so that data is not discarded, but if the capacity of the storage area in the power measurement terminal is increased, the power measurement terminal can be provided at low cost. There was a problem that would be impossible.

  The present invention has been made in view of the above-mentioned reasons, and its purpose is to accurately transmit a measurement value of electric energy even when a communication failure occurs with a host system of the power usage management system. And providing an inexpensive measurement terminal device.

The measurement terminal device of the present invention includes a measurement unit that measures a device to be measured, a storage unit that stores a record of measurement values measured by the measurement unit every predetermined unit time, and a remaining capacity of the storage unit And a control unit that integrates a plurality of records when a decrease is detected.
In the measurement terminal device of the present invention, the records integrated by the control unit are a plurality of continuous records.
In the measurement terminal device of the present invention, the control unit has a determination reference value for determining the remaining capacity of the storage unit, and when the remaining capacity of the storage unit becomes equal to or less than the determination reference value, the remaining capacity of the storage unit It is characterized in that a decrease in the detection is performed.
In the measurement terminal device of the present invention, the control unit changes the unit time interval of the record by increasing or decreasing the remaining capacity of the storage unit.
Moreover, the measurement terminal device of the present invention is characterized in that the control unit increases the unit time interval of the record when the remaining capacity of the storage unit becomes equal to or less than the determination reference value.
In the measurement terminal device of the present invention, the control unit integrates the oldest record and the immediately preceding record when the remaining capacity of the storage unit is equal to or less than the determination reference value.
In the measurement terminal device of the present invention, the control unit repeats the integration of records until the remaining capacity of the storage unit becomes equal to or less than the determination reference value.
Further, in the measurement terminal device according to the present invention, the control unit extracts the plurality of records that are continuously measured from the plurality of records of the storage unit, extract the plurality of records having the same elapsed time, and are extracted. Of these records, the records are integrated by adding the elapsed time and the electric energy of the record with the oldest measurement start date and time immediately before the record.
In addition, the measurement terminal device of the present invention further includes a communication unit, and communicates with a host terminal through the communication unit.

  Advantageous Effects of Invention According to the present invention, it is possible to provide an inexpensive measurement terminal device that accurately transmits a measured value of power even when a communication failure occurs with a host system of a power usage management system. it can.

FIG. 1 is an overall schematic diagram of an electric energy measuring system according to the present invention. FIG. 2 is a configuration diagram of the measurement terminal device of the present invention. FIG. 3 is a flowchart showing an overall processing procedure of the measurement terminal apparatus of the present invention. FIG. 4 is a diagram showing a data structure in the storage unit of the measurement terminal device of the present invention. FIG. 5 is a flowchart illustrating a record integration processing procedure in the measurement terminal device according to the first embodiment of the present invention. FIG. 6 is a diagram illustrating a state of a record at the time of record integration processing in the measurement terminal device according to the first embodiment of the present invention. FIG. 7 is a flowchart illustrating a record integration processing procedure in the measurement terminal device according to the second embodiment of the present invention. FIG. 8 is a diagram illustrating a state of a record in the process of record integration in the measurement terminal device according to the second embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, the overall configuration of the power usage management system according to the present embodiment will be described.

  FIG. 1 shows a power usage management system that measures power consumption at a certain consumer and transmits the measured value to a higher-level terminal such as a center or a PC located upstream.

  The measurement terminal devices 3a, 3b, 3c of the power usage management system read the current value with a current sensor in the trunk of the distribution board and the branch paths 2a, 2b, 2c branched from the trunk, and the voltage at the distribution board It is a device that can measure power by multiplying values.

  For example, loads 1a, 1b, and 1c such as lighting devices, refrigerators, and cooking appliances are connected to the branch paths 2a, 2b, and 2c of the distribution board. The measurement terminal devices 3a, 3b, and 3c have a storage area. The measurement value can be stored in the area and transmitted to the upper terminal 4 at a certain period or timing.

  As shown in FIG. 1, the power usage management system according to the present embodiment includes measurement terminal devices 3 a to 3 c attached to branch paths 2 a to 2 c for supplying power to loads 1 a to 1 c and one or more measurements. It is comprised with the high-order terminal 4 which collects or receives the power consumption measured from terminal device 3a-3c, and this high-order terminal 4 is connected via each communication terminal 5 with each measurement terminal device 3a-3c.

  As shown in FIG. 2, in the measurement terminal device 3, the probes 31 a to 31 c on the wiring path 2 connecting the distribution board and the measurement target device 1 constitute a part of the voltage measurement unit 33, and the current sensors 32 a to 32 b are A part of the current measuring unit 34 is configured. In addition, the measurement terminal device 3 measures the power amount measurement unit 35 that measures the power and the power amount based on the voltage value and the current value measured by the voltage measurement unit 33 and the current measurement unit 34, and measures the measurement start date and time and the elapsed time of the power amount. And a storage unit 38 that stores the measured electric energy, and a communication unit 39 that communicates with the upper terminal 4.

  In addition, the measurement terminal device 3 includes a record recording unit 371 that records the amount of power in the storage unit 38, a remaining capacity decrease detection unit 372 that detects a decrease in the remaining capacity of the storage unit 38, and a record that integrates the records in the storage unit 38. The control unit 37 includes an integration unit 373, a record transmission unit 374 that transmits records in the storage unit 38 using the communication unit 39, and a record deletion unit 375 that deletes records in the storage unit 38 that have been transmitted. Is provided.

  Next, an overall processing procedure in the measurement terminal apparatus 3 according to the present embodiment will be described. FIG. 3 is a flowchart showing an overall processing procedure in measurement terminal apparatus 3 according to the present embodiment.

  As illustrated in FIG. 3, the control unit 37 determines whether the power amount is acquired from the power amount measurement unit 35 (step S <b> 102). When the electric energy is acquired (Yes in step S102), the control unit 37 records the measurement start date and time and the elapsed time acquired together with the electric energy as a record in the storage unit 38 (step S103).

  Then, the control unit 37 determines whether or not the remaining amount of the storage unit 38 has fallen below a certain threshold (step S104). When it is determined that the remaining amount of the storage unit 38 is less than the threshold value (Yes in step S104), the control unit 37 performs a record integration process (step S105).

  And the control part 37 judges whether the transmission time of the data to the high-order terminal 4 has passed (step S106). When it is determined that the transmission time of data to the upper terminal 4 has elapsed (Yes in step S106), the control unit 37 transmits the record recorded in the storage unit 38 to the upper terminal 4 ( Step S107).

  And the control part 37 judges whether the transmission of the record to the high-order terminal 4 was successful (step S108). When the transmission of the record to the upper terminal 4 is successful (Yes in Step S108), the control unit 37 deletes the transmitted record in the storage unit 38 (Step S109).

  On the other hand, when it is determined that the transmission time of the data to the upper terminal 4 has not elapsed (No in step S106), when the record transmission to the upper terminal 4 fails (No in step S108). If there is, the control unit 37 repeats the processing from step S102.

  Next, the contents recorded in the storage unit 38 in the measurement terminal device 3 according to the present embodiment will be described. FIG. 4 is a diagram showing a data structure in the storage unit 38 of the measurement terminal device 3 according to the present embodiment.

  As shown in FIG. 4, a plurality of records can be recorded in the storage unit 38, and measurement start date and time, elapsed time, and electric energy value are stored for each record. Hereinafter, the newest record is referred to as the first record, the second newest record is referred to as the second record, the third record, the fourth record,... Nth record.

Further, the measurement start date and time of the _Nth record is expressed as DATE _N , the elapsed time of the _Nth record is expressed as DURATION _N , and the power amount of the _Nth record is expressed as ENERGY _N. The storage unit 38 has a remaining capacity decrease determination threshold. When the number of records in the storage unit 38 exceeds the remaining capacity decrease determination threshold, it is determined that the remaining capacity has decreased. Further, the storage unit 38 has an integration limit threshold value, and records that do not exceed the integration limit are not integrated by the record integration process.

  That is, new records after the record corresponding to the integration limit threshold are stored as raw records without being integrated.

  Next, a processing procedure for record integration in the measurement terminal device 3 according to the first embodiment of the present invention will be described. FIG. 5 is a flowchart showing a record integration processing procedure in the measurement terminal apparatus 3 according to the first embodiment of the present invention.

を満たすレコードを抽出する（ステップＳ２０３）。 As shown in FIG. 5, the control unit 37 determines whether there are two or more records older than the integration limit threshold in the storage unit 38 (step S202). When two or more records older than the integration limit threshold exist (when Yes in step S202), the control unit 37 uses the following formulas 1 and 2 among the records older than the integration limit threshold.

Records that satisfy the condition are extracted (step S203).

  Next, it is determined whether or not there is at least one record extracted in step S203 (step S204). When the number of records extracted in step S203 is one or more (in the case of Yes in step S204), the control unit 37 further extracts a record having the smallest elapsed time from the extracted records ( Step S205).

  Next, one record with the oldest measurement start date is extracted from the records extracted in step S205 (step S206).

Then, the value of the DURATION _N of one record extracted in step S206 and DURATION _N + DURATION _N-1, the value of ENERGY _N and ENERGY _N + ENERGY _N-1, further, remove the N-1 th record (Step S207).

  On the other hand, when two or more records older than the integration limit threshold do not exist (No in Step S202), when no number of records extracted in Step S203 exists (No in Step S204). ), The control unit 37 ends the process.

  As a result, when the remaining capacity of the storage unit 38 is reduced, the records are integrated and deleted, and a capacity for adding a new record is secured.

  Next, the record integration processing procedure in the measurement terminal device 3 according to the first embodiment of the present invention will be further described using a specific example. FIGS. 6A to 6E are diagrams illustrating record states in the record integration process in the measurement terminal device 3 according to the first embodiment of the present invention.

を満たす図６（ｂ）の網掛けのレコードが抽出され、抽出されたレコードが１つ以上存在するので、Ｓ２０４にてＹｅｓと判断される。 As shown in FIG. 6, when the records in the storage unit 38 are in the state shown in FIG. 6A, there are two or more records that are older than the integration limit threshold value, so it is determined Yes in S202. Next, in S203, among the records in FIG. 6A that are older than the integration limit threshold, the following formula 1 and formula 2

The shaded records in FIG. 6B that satisfy the above condition are extracted, and one or more extracted records exist, so that it is determined Yes in S204.

  Next, in S205, among the outlined character records in FIG. 6B, the elapsed time is the shortest (in this example, “1 minute”), and a plurality of outlined character records in FIG. 6C are extracted. Is done. Next, in S206, the record (58th) in FIG. 6 (d) with the oldest measurement start date is extracted from the plurality of white character records in FIG. 6 (c).

  Specifically, in FIG. 6B, since one or more extracted white character records exist, it is determined Yes in S204. Next, in S205, the white character record in FIG. 6C is extracted, and in S206, the 58th record in FIG. 6D is extracted.

Finally, the value of the DURATION ₅₈ at S207 and DURATION ₅₈ + DURATION _57, the value of ENERGY ₅₈ and _ENERGY 58 + ENERGY _57, further subsequent remove the 57 th record records are sequentially incremented, FIG 6 (e) It becomes the state. Free space for adding new records is secured.

  The processing flow of the second embodiment is shown in FIG. In the first embodiment, the oldest record and the immediately preceding record are merged among the continuous records having the same elapsed time and no measured value being recorded. 2, even if the elapsed times are different as shown in FIG. 7, the oldest record and the immediately preceding record are integrated among the continuous records without a section in which the measurement value cannot be recorded.

  That is, as a result of repeatedly adding the previous record to the oldest record repeatedly, the amount of power in the set elapsed time unit can be saved from the newest record to the integration limit threshold, as much as possible It is possible to analyze records that have the least amount of elapsed time.

  FIG. 7 is a flowchart showing a record integration processing procedure in the measurement terminal apparatus 3 according to the second embodiment of the present invention.

を満たすレコードを抽出する（ステップＳ３０３）。 As shown in FIG. 7, the control unit 37 determines whether or not there are two or more records older than the integration limit threshold in the storage unit 38 (step S302). If there are two or more records older than the integration limit threshold (if Yes in step S302), the control unit 37 uses the following formula 1 among the records older than the integration limit threshold:

Records that satisfy the condition are extracted (step S303).

  Next, it is determined whether or not there is one or more records extracted in step S303 (step S304). When the number of records extracted in step S303 is one or more (if Yes in step S304), the control unit 37 selects one of the extracted records with the oldest measurement start date and time. Extract (step S305).

Then, the value of the DURATION _N of one record extracted in step S305 and DURATION _N + DURATION _N-1, the value of ENERGY _N and ENERGY _N + ENERGY _N-1, further, remove the N-1 th record (Step S306).

  On the other hand, when two or more records older than the integration limit threshold do not exist (No in step S302), when no number of records extracted in step S304 exists (No in step S304). ), The control unit 37 ends the process.

  As a result, when the remaining capacity of the storage unit 38 is reduced, the records are integrated and deleted, and a capacity for adding a new record is secured.

  Next, the processing procedure of record integration in the measurement terminal device 3 according to the second embodiment of the present invention will be further described using a specific example. FIG. 8 is an operation explanatory diagram of the processing flow of FIG. 7, and FIGS. 8A to 8E show the state of records at the time of record integration processing in the measurement terminal device 3 according to the second embodiment of the present invention. FIG.

を満たす図８（ｂ）の白抜き文字のレコード（４２番目〜６１番目）が抽出され、抽出されたレコードが１つ以上存在するので、Ｓ３０４にてＹｅｓと判断される。 As shown in FIG. 8, when the records in the storage unit 38 are in the state shown in FIG. 8A, since there are two or more records older than the integration limit threshold, it is determined Yes in S302. Next, in S303, among the records in FIG.

The white character records (from the 42nd to the 61st) in FIG. 8B satisfying the above condition are extracted, and one or more extracted records exist, and therefore it is determined Yes in S304.

  Next, in S305, the record (61st) in FIG. 8B having the oldest measurement start date is extracted from the plurality of white character records in FIG. 8B.

  Specifically, in FIG. 8B, since one or more extracted white character records exist, it is determined Yes in S304. Next, in S305, the record (61st) in FIG. 8B with the oldest measurement start date is extracted from the white character records in FIG. 8B.

Next, the DURATION ₆₁ + DURATION ₆₀ the value of the DURATION ₆₁ at S306, the value of ENERGY ₆₁ and _ENERGY 61 + ENERGY _60, further removes the 60 th record, brought forward the subsequent records, and FIG. 8 (c) Thus, a free space for adding a new record is secured.

Further, when the storage unit remaining capacity drop is detected as in the state of FIG. 8D at the next power amount acquisition, the flowchart of FIG. 7 is executed again, and the white of FIG. vent records (42 th to 61 th) of the characters are extracted, and the value of the DURATION ₆₁ and DURATION ₆₁ + DURATION ₆₀ at S306, the value of ENERGY ₆₁ with _ENERGY 61 + ENERGY _60, further, remove the 60 th record 61 The No. record is moved up to No. 60 and becomes the state of FIG. Free space for adding new records again is secured.

  In addition to the first and second embodiments, the control unit has a function of changing the unit time interval (elapsed time) of the record to be stored, and after determining that the remaining capacity of the storage unit is reduced, The unit time interval (elapsed time) of the record stored in the storage unit may be increased to reduce the rate at which the remaining capacity of the storage unit decreases. On the other hand, when the free space of the storage unit is sufficiently large, the unit time interval (elapsed time) of the stored record may be reduced.

DESCRIPTION OF SYMBOLS 1 Measurement object apparatus 1a-1c Load 2 Wiring path 2a-2c Branching path 3 Measurement terminal device 3a-3c Measurement terminal apparatus 4 Host terminal 5 Communication path 31a-31c Probe 32a-32b Current sensor 33 Voltage measurement part 34 Current measurement part 35 Power measurement unit 36 Clock unit 37 Control unit 38 Storage unit 39 Communication unit 371 Record recording unit 372 Capacity drop detection unit 373 Record integration unit 374 Record transmission unit 375 Record deletion unit DATE _N Measurement start date and time of _Nth record DURATION _N N Elapsed time of the first record ENERGY _N Energy amount of the Nth record

Claims (9)

A measurement unit for measuring the device under measurement;
A storage unit for storing a record for each predetermined unit time of the measurement value measured by the measurement unit;
A control unit that integrates a plurality of records upon detecting a decrease in the remaining capacity of the storage unit;
A measurement terminal device comprising:   The measurement terminal apparatus according to claim 1, wherein the records integrated by the control unit are a plurality of continuous records. The control unit has a determination reference value for determining the remaining capacity of the storage unit,
The measurement terminal device according to claim 2, wherein when the remaining capacity of the storage unit becomes equal to or less than the determination reference value, a decrease in the remaining capacity of the storage unit is detected.   The measurement terminal apparatus according to claim 1, wherein the control unit changes a unit time interval of the record by increasing or decreasing a remaining capacity of the storage unit. When the remaining capacity of the storage unit is less than or equal to the determination reference value, the control unit
The measurement terminal device according to claim 3, wherein a unit time interval of the record is increased.   The measurement terminal device according to claim 3, wherein when the remaining capacity of the storage unit becomes equal to or less than the determination reference value, the control unit integrates the oldest record and a record immediately before the old record.   The measurement terminal apparatus according to claim 3, wherein the control unit repeats integration of records until a remaining capacity of the storage unit becomes equal to or less than the determination reference value. In the measurement terminal device according to claims 1 to 3,
The control unit extracts a plurality of records that are continuously measured from a plurality of records in the storage unit and have the same elapsed time, and a measurement start date and time is the same among the extracted records. A measurement terminal device which integrates records by adding elapsed time and electric energy of an oldest record and a record immediately before it. A communication unit;
The measurement terminal device according to claim 1, wherein the communication unit communicates with an upper terminal.

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