WO2013118257A1 - Electronic power meter - Google Patents

Electronic power meter Download PDF

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Publication number
WO2013118257A1
WO2013118257A1 PCT/JP2012/052819 JP2012052819W WO2013118257A1 WO 2013118257 A1 WO2013118257 A1 WO 2013118257A1 JP 2012052819 W JP2012052819 W JP 2012052819W WO 2013118257 A1 WO2013118257 A1 WO 2013118257A1
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WO
WIPO (PCT)
Prior art keywords
infrared
terminal cover
input
hour meter
terminal
Prior art date
Application number
PCT/JP2012/052819
Other languages
French (fr)
Japanese (ja)
Inventor
剛士 斎藤
桂州 近藤
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to CN201280069423.8A priority Critical patent/CN104115014A/en
Priority to PCT/JP2012/052819 priority patent/WO2013118257A1/en
Publication of WO2013118257A1 publication Critical patent/WO2013118257A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
    • G01R11/02—Constructional details
    • G01R11/04—Housings; Supporting racks; Arrangements of terminals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
    • G01R11/02—Constructional details
    • G01R11/24—Arrangements for avoiding or indicating fraudulent use

Definitions

  • This invention relates to a device for monitoring the terminal cover mounting state in order to prevent unauthorized operation after the installation and wiring of an electronic watt-hour meter used for electricity bill transactions.
  • an electronic watt-hour meter has a mechanism for detecting a terminal cover attachment state in order to monitor whether an illegal wiring operation such as a theft of electric power is performed. For example, by placing a switch on the body and a protrusion on the terminal cover, when the terminal cover is attached to the body, the protrusion on the terminal cover presses the body switch and the terminal cover is attached. When the terminal cover is removed when the terminal cover is removed, the main body switch and the terminal cover protrusion are separated to detect whether the terminal cover has been removed and to determine whether an unauthorized wiring operation has been performed. There is something to do. Further, as a method for detecting the attachment of the terminal cover, there is a method in which the position of the sealing screw is detected by a sensor.
  • the present invention has been made to solve the above-described problems, and provides an electronic watt-hour meter with improved detection reliability with a small number of parts.
  • An electronic watt-hour meter includes a CPU for calculating necessary electric quantities including electric energy from currents and voltages input from an electric circuit to be measured, and electric power for storing data of the calculated electric quantities.
  • a watt-hour meter main unit having a watt-hour metering function central portion provided with a watt-metering portion and an output portion for transmitting the electric quantity data stored in the watt-hour meter to the outside, and input from the electric circuit
  • the electronic watt-hour meter integrally including a terminal block having an input terminal for taking in current and voltage and a terminal portion provided with a terminal cover covering the input terminal, a portion where the input terminal does not exist in the terminal block
  • An infrared ray transmitting element and an infrared ray receiving element which are disposed separately from each other in the installation area, and the infrared ray transmitting element and the infrared ray receiving element on the back surface of the terminal cover.
  • a reflective member is provided that reflects infrared rays transmitted from the infrared transmitting element and inputs the infrared rays to the infrared receiving element when the terminal cover is closed and the terminal cover is closed, and the terminal cover is closed when the terminal cover is closed.
  • the infrared transmitting element, the infrared receiving element, and the reflecting member are covered by the terminal cover, and when the terminal cover is closed, the input is performed and the terminal cover is opened or removed. Is to improve the detection reliability with a small number of parts by determining by the CPU whether or not the terminal cover is closed from the infrared input state that the input is not performed. .
  • An electronic watt-hour meter includes a CPU for calculating necessary electric quantities including electric energy from currents and voltages input from an electric circuit to be measured, and an electric energy for storing data of the calculated electric quantities.
  • a watt-hour meter main unit having a watt-hour metering function central portion including a measuring unit and an output unit for transmitting the data of the various electric quantities stored in the watt-hour measuring unit to the outside, and input from the electric circuit
  • an electronic watt-hour meter integrally including a terminal block having an input terminal for taking in current and voltage and a terminal portion provided with a terminal cover covering the input terminal, a portion of the terminal block where the input terminal does not exist The formed installation area, the infrared transmission element and the infrared reception element that are arranged separately from each other in the installation area, and the infrared transmission element and the infrared reception element on the back surface of the terminal cover
  • a reflective member is provided that reflects infrared rays transmitted from the infrared transmitting element and
  • the infrared transmitting element, the infrared receiving element, and the reflecting member are covered by the terminal cover, and when the terminal cover is closed, the input is performed and the terminal cover is opened or removed. Since the CPU determines whether the terminal cover is closed or not from the infrared input state that the input is not performed, a mechanical switch is not required and the detection reliability is improved. Can be improved.
  • FIG. 2 is a side sectional view of the cross section taken along the line AA in FIG.
  • FIG. 3 is a side sectional view of a section taken along line BB in FIG. 2 as viewed in the direction of the arrow.
  • FIG. 2 is a side sectional view of the cross section taken along the line AA in FIG.
  • FIG. 3 is a side sectional view of a section taken along line BB in FIG. 2 as viewed in the direction of the arrow.
  • FIG. 3 is a block diagram which shows an example of an internal structure of the electronic watt-hour meter in Embodiment 1 of this invention. It is explanatory drawing explaining an infrared data transmission / reception state when a state changes from FIG. 1 to FIG.
  • FIG. 1 is an external perspective view of an electronic watt-hour meter 100 according to Embodiment 1 of the present invention
  • FIG. 2 is an external perspective view of the electronic watt-hour meter 100 according to Embodiment 1 of the present invention with the terminal cover 2 removed.
  • 3 is a cross-sectional view taken along the line AA of FIG. 1
  • FIG. 4 is a cross-sectional view taken along the line BB of FIG. 2 showing the electronic watt-hour meter 100 with the terminal cover 2 removed
  • FIG. 6 is a block diagram showing the internal configuration of the meter 100
  • FIG. 6 is an explanatory diagram for explaining the infrared data transmission / reception state when the state changes from FIG. 1 to FIG. 2
  • FIG. 7 is a flowchart showing the operation of detecting terminal cover removal
  • 8 is an explanatory diagram for explaining an infrared data transmission / reception state when the state changes from FIG. 2 to FIG. 1
  • FIG. 9 is a flowchart showing an operation of terminal cover attachment detection.
  • 1A is a watt-hour meter main unit
  • 1B is a terminal unit
  • 1BT is an input terminal
  • 1BTA is an installation area
  • 1BTB is a terminal block
  • 2 is a terminal cover
  • 3 is an infrared data transmission unit
  • 4 is an infrared ray.
  • a data receiving unit 5 is a probe fixing guide for infrared communication.
  • 6 is an infrared transmitting element for transmitting infrared data
  • 7 is an infrared receiving element for receiving infrared data
  • 8a and 8b are light guide lenses
  • 9 is a reflecting member
  • 10 is a cover.
  • the cover 10 is made of a transparent resin molded product, and the light guide lenses 8 a and 8 b are formed integrally with the cover 10.
  • the electronic watt-hour meter 100 includes a current input unit 22 that converts an input from CT and VT of the electric circuit PSL into a digital signal, and a current value input from the voltage input unit 23 and a voltage from the voltage value
  • a measurement calculation unit 24 that calculates various electric quantities such as current, power, reactive power, power factor, and frequency
  • a display unit 25 that displays measurement values and setting items calculated by the measurement calculation unit 24, and a measurement calculation unit.
  • a CPU 26 that performs measurement calculation by 24, various settings for display on the display unit 25, and display content switching control, and an operation unit 27 that performs setting operations on the CPU 26 are provided.
  • the electronic indicator 100 further includes a pulse output unit 28 for outputting a pulse according to the integrated value of the electric energy to the outside, and setting data for each setting item such as setting of pulse output and constant setting of CT and VT.
  • An infrared communication control unit 29 that can send and receive to / from an external setting device, a wireless communication unit 30 for reporting the meter reading value and unauthorized use, etc., to an electric power company center, and an alarm issuing unit 40 that issues an alarm I have.
  • the infrared communication control unit 29 is connected to the infrared transmission element 6 and the infrared reception element 7 that transmit and receive the infrared data described above.
  • FIG. 6 is an infrared data transmission / reception state diagram when the state changes from the terminal cover 2 attached state of FIG. 1 to the terminal cover 2 detached state of FIG. 2
  • FIG. 7 is the terminal cover of FIG. 1 from the terminal cover 2 detached state of FIG. It is an infrared data transmission / reception state figure when a state changes to 2 mounting state.
  • infrared data transmitted from the infrared transmission element 6 is guided upward through the light guide lens 8a, reflected by the surface of the reflecting member 9, and received by the infrared light through the light guide lens 8b.
  • the electronic watt-hour meter 100 performs this operation at regular intervals, and when the transmission / reception is normally performed, the terminal cover 2 detects that the terminal cover 2 is attached.
  • the infrared data transmitted from the infrared transmission element 6 is guided to the upper part through the light guide lens 8a. Infrared data is not guided to the receiving element 7 and no infrared data is received. As shown in FIG. 6, the electronic watt-hour meter 100 detects that the terminal cover 2 has been removed when the infrared data is not received.
  • a CPU 26 that calculates necessary electric quantities including electric energy from current and voltage input from the electric circuit PSL to be measured, and an electric energy measuring unit 24 that stores data of the calculated electric quantities.
  • An electric energy meter main body 1A having a central portion of an electric energy metering function including an output unit 28 for transmitting the electric quantity data stored in the electric energy meter 24 to the outside, and an input from the electric circuit PSL
  • An electronic watt-hour meter 100 integrally including a terminal block 1BTB having an input terminal 1BT for taking in current and voltage and a terminal portion 1B having a terminal cover 2 covering the input terminal 1BT, An installation area 1BTA formed in a portion of the 1BTB where the input terminal 1BT does not exist, and an infrared ray transmission arranged in parallel and spaced apart from the installation area 1BTA.
  • a reflecting member 9 that reflects the input infrared rays and inputs the reflected infrared rays to the infrared receiving element 7.
  • the infrared transmitting element 6, the infrared receiving element 7, and the reflecting member 9 are The infrared ray is covered by the terminal cover 2, and the infrared ray input is performed when the terminal cover 2 is closed, and the infrared ray input is not performed when the terminal cover 2 is opened or removed.
  • the CPU determines whether or not the terminal cover 2 is closed from the input state.
  • the CPU 26 detects that the infrared input to the infrared receiving element 7 does not exist for a predetermined time, it reports to the outside that the infrared input to the infrared receiving element 7 does not exist for a predetermined time. To do. Further, the notification to the outside is an abnormality report for reporting an abnormality.
  • the communication unit 30 for reporting to the outside is provided separately from the output unit 28 for transmitting the data of various electric quantities to the outside.
  • the predetermined time is set from the outside via the communication unit 30.
  • an alarm generator 40 that issues an alarm is incorporated in the watt-hour main body 1A. is there.
  • the predetermined time is variable.
  • the terminal cover 2 is closed from the infrared input state where the input is performed when the terminal cover 2 is closed and the input is not performed when the terminal cover 2 is opened or removed. It is possible to set and cancel the function of determining whether or not the user has Whether the terminal cover is closed from the infrared input state where the input is performed when the terminal cover is closed and the input is not performed when the terminal cover is opened or removed. This function can be set and canceled from the outside via the communication unit.
  • the above-described unauthorized wiring is performed by opening the terminal cover 2 and short-circuiting between the input terminals 1BT and 1BT connected to the CT output terminal with a conductive wire. Therefore, in order to detect unauthorized wiring performed by opening the terminal cover 2, the following detection operation for removing the terminal cover 2 is performed in the present embodiment.
  • detection data for attachment of the terminal cover 2 is transmitted from the infrared transmission element 7 at regular intervals.
  • the detection data transmitted from the infrared transmitting element 6 is reflected by the reflecting member 9 and received by the infrared receiving element 7.
  • the detection data is not reflected by the reflecting member 9, so that the infrared receiving element 7 cannot receive data, and the removal of the terminal cover 2 can be detected.
  • the CPU 26 transmits detection data from the infrared communication control unit 29 via the infrared transmission element 6 (step S11), and determines whether the detection data can be received from the infrared reception element 7 via the infrared communication control unit 29. Judgment is made (step S12). If it can be received, the counter N is reset (step S13), and a waiting process for a predetermined time until the next detection data transmission (step S11) is performed (step S13).
  • step S12 the process proceeds to step S15, where the counter N is incremented, and it is then determined whether the counter N exceeds the first predetermined number (Ste S16). If the counter N does not exceed the first predetermined number, the process proceeds to step S14 to perform a waiting process for a predetermined time until the next detection data transmission (step S11) (step S13). If the counter N exceeds the first predetermined number, the terminal cover 2 performs removal detection processing (step S17).
  • step S18 it is determined whether or not communication data from an external setting device, which is the original purpose of infrared communication, has been received. If communication data is received from the setting device, it is not an unauthorized removal of the terminal cover, so the processing ends. If communication data from the setting device has not been received, the process proceeds to step S19, where it is determined whether the counter M has exceeded the second predetermined number. If the counter M does not exceed the second predetermined number, the process proceeds to step S20, an integration process for counting up the counter M is performed, and the process returns to the process for determining the received data from the setter in step S18.
  • step S21 If the counter M exceeds the second predetermined number, the process proceeds to step S21, and after performing an unauthorized operation detection process, the wireless communication unit 30 reports an abnormality to the outside and issues an alarm from the alarm output.
  • This fixed time can be set in advance from the infrared data transmitter / receiver, and can also be set from the outside using a separately provided communication means.
  • a certain time (indicated as “certain time” in FIG. 8) is taken to detect that the terminal cover 2 is attached. Start sending data automatically. If the terminal cover 2 is attached, the detection data transmitted from the infrared transmitting element 6 is reflected by the reflecting member 9 and received by the infrared receiving element 7. Can do.
  • the predetermined time can be set in advance from the infrared data transmitter / receiver, and can also be set from the outside using a separately provided communication means. The setting from the outside may be performed by an external setting device (not shown) installed in a remote place far from the watt-hour meter.
  • the functions of the external setting device are roughly classified into the following three.
  • Data measured values such as electric energy, instantaneous electric power, and power factor
  • Control open / close
  • the relay built in the watt-hour meter The functions of the external setting device are roughly classified into the following three.
  • Set parameters date / time, metering method (postpaid or prepaid), etc.) for the electricity meter.
  • step S101 After completing the infrared communication with the setting device via the infrared communication control unit 29 (step S101), the CPU 26 performs a waiting process for a predetermined time (step S102). When the predetermined time has elapsed, after the counter L is reset (step S103), the detection data is transmitted from the infrared communication control unit 29 via the infrared transmission element 6 (step S104), and the detection data is transmitted to the infrared reception element 7. Is received through the infrared communication control unit 29 (step S105). If the terminal cover 2 has been received, a process for detecting the attachment of the terminal cover 2 is performed (step S106).
  • step S105 if the detection data cannot be received in step S105, the process proceeds to step S107, and it is determined whether or not the counter L has exceeded the third predetermined number. If the counter L does not exceed the third predetermined number, the counter L is incremented (step S108), and then the next detection data is transmitted (step S104). If the counter L exceeds the third predetermined number in step S107, after processing for abnormal attachment of the terminal cover 2 (step S109), the wireless communication unit 30 reports an abnormality to the outside (step S110). An alarm is issued from the alarm output.
  • the terminal cover mounting detection data transmission can be started by transmitting a start request data when the infrared communication ends.
  • the detection data transmitted from the infrared data transmission / reception unit 29 communicating with the external setting device via the infrared transmission element 6 is reflected by the reflection member 9 provided on the terminal cover 2, and the detection is performed. Since the presence / absence of the terminal cover is detected by receiving the business data from the infrared receiving element 7 by the infrared data transmission / reception unit 29, a mechanical switch is not required and the reliability of detection of the terminal cover 2 can be improved.
  • the infrared data transmitting / receiving unit 29 the infrared transmitting element 6, and the infrared receiving element 7 provided to communicate with an external setting device, a switch for detecting the terminal cover 2 is not necessary, and the cost can be reduced.
  • the terminal cover 2 is detected using infrared rays for communication, it is not necessary to provide a hole in the portion where the terminal cover 2 is detected, so that the waterproof performance can be improved.
  • 1 Energy meter 1A Energy meter body, 1B terminal, 1BT input terminal, 1BTA installation area, 1BTB terminal block, 2 Terminal cover, 3 Infrared data transmitter, 4 Infrared data receiver 5 Probe fixing guide for infrared communication, 6 Infrared transmitting element, 7 Infrared receiving element, 8a light guide lens, 8b light guide lens, 9 reflective member, 10 cover, 22 current input section, 23 voltage input section, 24 Electricity meter, 25 Display, 26 CPU, 28 pulse output unit, 29 infrared communication control unit, 30 wireless communication unit, 40 alarm reporting unit, 100 electronic watt-hour meter, PSL electric circuit.

Abstract

This invention is provided with: an installation area (1BTA) formed at a portion on a terminal block (1BTB) where the input terminal (1BT) is not present; infrared transmission elements (6) and infrared reception elements (7) disposed in a lateral parallel arrangement at a distance from each other in the installation area (1BTA); and a reflecting member (9) for reflecting infrared light transmitted from the infrared transmission elements (6) and causing the infrared light to be input to the infrared reception elements (7) in a state in which the terminal cover (2) is closed, the reflecting member (9) being installed on the reverse surface of the terminal cover (2) so as to face the infrared transmission elements (6) and the infrared reception elements (7). A CPU determines whether or not the terminal cover (2) is closed on the basis of the input state of the infrared light; that is, the infrared light is input when the infrared transmission elements (6), the infrared reception elements (7), and the reflecting member (9) are covered by the terminal cover (2), and the terminal cover (2) is closed; and the infrared light is not input when the terminal cover (2) is open or detached. Detection of whether the cover is open or closed is thereby made more reliable.

Description

電子式電力量計Electronic energy meter
　この発明は、電気料金の取引に使用する電子式電力量計の設置・配線完了後に不正操作を防止するために端子カバーの装着状態を監視する装置に関するものである。 This invention relates to a device for monitoring the terminal cover mounting state in order to prevent unauthorized operation after the installation and wiring of an electronic watt-hour meter used for electricity bill transactions.
　従来より電子式電力量計は、盗電等の不正な配線操作が行われていないか監視するために、端子カバーの装着状態検知の仕組みを持っている。例えば、本体にスイッチを配設し、端子カバーには突起部分を配設することにより、本体へ端子カバーを装着した際には、端子カバーの突起部分が本体スイッチを押下し、端子カバーの装着状態を検知し、端子カバーが取外された場合は、本体スイッチと端子カバー突起部分が離れることにより、端子カバーが取外された状態を検知して、不正な配線操作が行われたかどうか判別するものがある。
　また、端子カバーの装着検知方法として、封印ねじの位置をセンサにて検知するものがある。
　なお、不正配線が行われることがあることは周知であり、例えば、単相２線式の場合は、電力量計内の電流センサへの入出力電線間を導電線で短絡すれば、電力を使用しても電流センサに電流が流れなくなり電力量の計量がされなくなることから、不正配線が行われることがある。
２００２－２５７８６２号公報（図４及びその説明） 2. Description of the Related Art Conventionally, an electronic watt-hour meter has a mechanism for detecting a terminal cover attachment state in order to monitor whether an illegal wiring operation such as a theft of electric power is performed. For example, by placing a switch on the body and a protrusion on the terminal cover, when the terminal cover is attached to the body, the protrusion on the terminal cover presses the body switch and the terminal cover is attached. When the terminal cover is removed when the terminal cover is removed, the main body switch and the terminal cover protrusion are separated to detect whether the terminal cover has been removed and to determine whether an unauthorized wiring operation has been performed. There is something to do.
Further, as a method for detecting the attachment of the terminal cover, there is a method in which the position of the sealing screw is detected by a sensor.
In addition, it is well known that unauthorized wiring may be performed. For example, in the case of a single-phase two-wire system, if the input and output wires to the current sensor in the watt hour meter are short-circuited with a conductive wire, the power is reduced. Even if it is used, current does not flow to the current sensor and the amount of electric power is not measured, so that illegal wiring may be performed.
No. 2002-257862 (FIG. 4 and its description)
　従来の電子式電力量計は以上のようにスイッチによる端子カバーの装着状態検知を行っているため、検知用のスイッチを別途用意する必要があることに加え、機械的な動作による検知のため、スイッチ部の信頼性に課題があった。 Since the conventional electronic watt-hour meter detects the mounting state of the terminal cover with a switch as described above, in addition to the need to prepare a separate switch for detection, for detection by mechanical operation, There was a problem with the reliability of the switch.
　この発明は、上記のような課題を解決するためになされたもので、少ない部品点数で、検知の信頼性を向上した電子式電力量計を提供するものである。 The present invention has been made to solve the above-described problems, and provides an electronic watt-hour meter with improved detection reliability with a small number of parts.
　本発明に係る電子式電力量計は、計量対象の電路から入力された電流及び電圧から電力量を含む必要な諸電気量を演算するＣＰＵと前記演算された諸電気量のデータを保存する電力量計量部とこの電気量計量部に保存された前記諸電気量のデータを外部に送信する出力部とを備えた電力量計量機能中枢部を内蔵する電力量計本体部、および前記電路から入力される電流及び電圧を取り込む入力端子を有する端子台と前記入力端子を覆う端子カバーとを備えた端子部とを一体に有する電子式電力量計において、前記端子台における前記入力端子が存在しない部分に形成された設置領域、前記設置領域にそれぞれ離間して配設された赤外線送信素子および赤外線受信素子、及び前記端子カバーの裏面に前記赤外線送信素子および赤外線受信素子に対向して配設され前記端子カバーが閉じている状態において前記赤外線送信素子から送信された赤外線を反射して前記赤外線受信素子に入力させる反射部材を備え、前記端子カバーが閉じている状態では前記赤外線送信素子と前記赤外線受信素子と前記反射部材とは前記前記端子カバーによって覆われており、前記端子カバーが閉じている状態では前記入力が行われ前記端子カバーが開いた或いは外された状態においては前記入力が行われないという前記赤外線の入力状態から前記端子カバーが閉じられているか否かの状態を前記ＣＰＵにより判別することにより、少ない部品点数で、検知の信頼性を向上させるものである。 An electronic watt-hour meter according to the present invention includes a CPU for calculating necessary electric quantities including electric energy from currents and voltages input from an electric circuit to be measured, and electric power for storing data of the calculated electric quantities. A watt-hour meter main unit having a watt-hour metering function central portion provided with a watt-metering portion and an output portion for transmitting the electric quantity data stored in the watt-hour meter to the outside, and input from the electric circuit In the electronic watt-hour meter integrally including a terminal block having an input terminal for taking in current and voltage and a terminal portion provided with a terminal cover covering the input terminal, a portion where the input terminal does not exist in the terminal block An infrared ray transmitting element and an infrared ray receiving element which are disposed separately from each other in the installation area, and the infrared ray transmitting element and the infrared ray receiving element on the back surface of the terminal cover. A reflective member is provided that reflects infrared rays transmitted from the infrared transmitting element and inputs the infrared rays to the infrared receiving element when the terminal cover is closed and the terminal cover is closed, and the terminal cover is closed when the terminal cover is closed. The infrared transmitting element, the infrared receiving element, and the reflecting member are covered by the terminal cover, and when the terminal cover is closed, the input is performed and the terminal cover is opened or removed. Is to improve the detection reliability with a small number of parts by determining by the CPU whether or not the terminal cover is closed from the infrared input state that the input is not performed. .
　本発明による電子式電力量計は、計量対象の電路から入力された電流及び電圧から電力量を含む必要な諸電気量を演算するＣＰＵと前記演算された諸電気量のデータを保存する電力量計量部とこの電気量計量部に保存された前記諸電気量のデータを外部に送信する出力部とを備えた電力量計量機能中枢部を内蔵する電力量計本体部、および前記電路から入力される電流及び電圧を取り込む入力端子を有する端子台と前記入力端子を覆う端子カバーとを備えた端子部とを一体に有する電子式電力量計において、前記端子台における前記入力端子が存在しない部分に形成された設置領域、前記設置領域にそれぞれ離間して配設された赤外線送信素子および赤外線受信素子、及び前記端子カバーの裏面に前記赤外線送信素子および赤外線受信素子に対向して配設され前記端子カバーが閉じている状態において前記赤外線送信素子から送信された赤外線を反射して前記赤外線受信素子に入力させる反射部材を備え、前記端子カバーが閉じている状態では前記赤外線送信素子と前記赤外線受信素子と前記反射部材とは前記前記端子カバーによって覆われており、前記端子カバーが閉じている状態では前記入力が行われ前記端子カバーが開いた或いは外された状態においては前記入力が行われないという前記赤外線の入力状態から前記端子カバーが閉じられているか否かの状態を前記ＣＰＵにより判別するように構成したので、機械的なスイッチが不要となり検知の信頼性を向上することができる。 An electronic watt-hour meter according to the present invention includes a CPU for calculating necessary electric quantities including electric energy from currents and voltages input from an electric circuit to be measured, and an electric energy for storing data of the calculated electric quantities. A watt-hour meter main unit having a watt-hour metering function central portion including a measuring unit and an output unit for transmitting the data of the various electric quantities stored in the watt-hour measuring unit to the outside, and input from the electric circuit In an electronic watt-hour meter integrally including a terminal block having an input terminal for taking in current and voltage and a terminal portion provided with a terminal cover covering the input terminal, a portion of the terminal block where the input terminal does not exist The formed installation area, the infrared transmission element and the infrared reception element that are arranged separately from each other in the installation area, and the infrared transmission element and the infrared reception element on the back surface of the terminal cover A reflective member is provided that reflects infrared rays transmitted from the infrared transmitting element and inputs the infrared rays to the infrared receiving element when the terminal cover is closed and the terminal cover is closed, and the terminal cover is closed when the terminal cover is closed. The infrared transmitting element, the infrared receiving element, and the reflecting member are covered by the terminal cover, and when the terminal cover is closed, the input is performed and the terminal cover is opened or removed. Since the CPU determines whether the terminal cover is closed or not from the infrared input state that the input is not performed, a mechanical switch is not required and the detection reliability is improved. Can be improved.
本発明の実施の形態１における電子式電力量計の外観の一例を示す斜視図である。It is a perspective view which shows an example of the external appearance of the electronic watt-hour meter in Embodiment 1 of this invention. 図１において端子カバーを取外した状態での外観の一例を示す斜視図である。It is a perspective view which shows an example of the external appearance in the state which removed the terminal cover in FIG. 図１のＡ－Ａ線における断面を矢印方向に見た側断面図である。FIG. 2 is a side sectional view of the cross section taken along the line AA in FIG. 図２のＢ－Ｂ線における断面を矢印方向に見た側断面図である。FIG. 3 is a side sectional view of a section taken along line BB in FIG. 2 as viewed in the direction of the arrow. 本発明の実施の形態１における電子式電力量計の内部構成の一例を示すブロック図である。It is a block diagram which shows an example of an internal structure of the electronic watt-hour meter in Embodiment 1 of this invention. 図１から図２へ状態が変化するときの赤外線データ送受信状態を説明する説明図である。It is explanatory drawing explaining an infrared data transmission / reception state when a state changes from FIG. 1 to FIG. 本発明の実施の形態１における電子式電力量計の端子カバー取り外し検知の動作の一例を示すフローチャートである。It is a flowchart which shows an example of the operation | movement of terminal cover removal detection of the electronic watt-hour meter in Embodiment 1 of this invention. 図２から図１へ状態が変化するときの赤外線データ送受信状態の一例を説明する説明図である。It is explanatory drawing explaining an example of an infrared data transmission / reception state when a state changes from FIG. 2 to FIG. 本発明の実施の形態１における電子式電力量計の端子カバー装着検知の動作の一例を示すフローチャートである。It is a flowchart which shows an example of the operation | movement of terminal cover mounting | wearing detection of the electronic watt-hour meter in Embodiment 1 of this invention.
実施の形態１．
　本発明の実施の形態１の電子式電力量計を図１～図５を用いて説明する。
　図１は本発明の実施形態１における電子式電力量計１００の外観斜視図、図２は、本発明の実施形態１における電子式電力量計１００の端子カバー２を取外した状態の外観斜視図、図３は図1のＡ－Ａ側断面図、図４は、端子カバー２を外した状態の電子式電力量計１００を示す図２のＢ－Ｂ側断面図、図５は電子式電力量計１００の内部構成を示すブロック図、図６は図１から図２へ状態が変化するときの赤外線データ送受信状態を説明する説明図、図７は端子カバー取り外し検知の動作を示すフローチャート、図８は図２から図１へ状態が変化するときの赤外線データ送受信状態を説明する説明図、図９は端子カバー装着検知の動作を示すフローチャートである。 Embodiment 1 FIG.
An electronic watt-hour meter according to Embodiment 1 of the present invention will be described with reference to FIGS.
1 is an external perspective view of an electronic watt-hour meter 100 according to Embodiment 1 of the present invention, and FIG. 2 is an external perspective view of the electronic watt-hour meter 100 according to Embodiment 1 of the present invention with the terminal cover 2 removed. 3 is a cross-sectional view taken along the line AA of FIG. 1, FIG. 4 is a cross-sectional view taken along the line BB of FIG. 2 showing the electronic watt-hour meter 100 with the terminal cover 2 removed, and FIG. 6 is a block diagram showing the internal configuration of the meter 100, FIG. 6 is an explanatory diagram for explaining the infrared data transmission / reception state when the state changes from FIG. 1 to FIG. 2, and FIG. 7 is a flowchart showing the operation of detecting terminal cover removal. 8 is an explanatory diagram for explaining an infrared data transmission / reception state when the state changes from FIG. 2 to FIG. 1, and FIG. 9 is a flowchart showing an operation of terminal cover attachment detection.
　図１、図２において、１Ａは電力量計本体部、１Ｂは端子部、１ＢＴは入力端子、１ＢＴＡは設置領域、１ＢＴＢは端子台、２は端子カバー、３は赤外線データ送信部、４は赤外線データ受信部であり、５は赤外線通信用プローブ固定ガイドである。 1 and 2, 1A is a watt-hour meter main unit, 1B is a terminal unit, 1BT is an input terminal, 1BTA is an installation area, 1BTB is a terminal block, 2 is a terminal cover, 3 is an infrared data transmission unit, and 4 is an infrared ray. A data receiving unit 5 is a probe fixing guide for infrared communication.
　図３において、６は赤外線データを送信する赤外線送信素子、７は赤外線データを受信する赤外線受信素子、８a、８ｂは導光レンズ、９は反射部材、１０はカバーである。カバー１０は、透明の樹脂成形品から成り、導光レンズ８a、８ｂはカバー１０と一体に形成されている。 In FIG. 3, 6 is an infrared transmitting element for transmitting infrared data, 7 is an infrared receiving element for receiving infrared data, 8a and 8b are light guide lenses, 9 is a reflecting member, and 10 is a cover. The cover 10 is made of a transparent resin molded product, and the light guide lenses 8 a and 8 b are formed integrally with the cover 10.
　図５に示すように、電子式電力量計１００は、電路ＰＳＬのＣＴ、ＶＴからの入力をデジタル信号に変換する電流入力部２２と電圧入力部２３へ入力された電流値、電圧値から電圧、電流、電力、無効電力、力率、周波数などの各種電気量を演算する計測演算部２４と、この計測演算部２４で演算した計測値や設定項目を表示する表示部２５と、計測演算部２４による計測演算や、表示部２５における表示のための各種設定や表示内容の切替え制御を行うＣＰＵ２６と、このＣＰＵ２６への設定操作を行う操作部２７とを備えている。 As shown in FIG. 5, the electronic watt-hour meter 100 includes a current input unit 22 that converts an input from CT and VT of the electric circuit PSL into a digital signal, and a current value input from the voltage input unit 23 and a voltage from the voltage value A measurement calculation unit 24 that calculates various electric quantities such as current, power, reactive power, power factor, and frequency, a display unit 25 that displays measurement values and setting items calculated by the measurement calculation unit 24, and a measurement calculation unit. A CPU 26 that performs measurement calculation by 24, various settings for display on the display unit 25, and display content switching control, and an operation unit 27 that performs setting operations on the CPU 26 are provided.
　電子式指示計器１００は、更に、電力量の積算値に応じたパルスを外部へ出力するためのパスル出力部２８と、パスル出力の設定及びＣＴ、ＶＴの定数設定など各設定項目の設定データを外部の設定器と送受信できる赤外線通信制御部２９と、電力量の検針値や不正使用などを電力会社のセンターに通報するための無線通信部３０と、自身が警報を発する警報発報部４０を備えている。
　赤外線通信制御部２９には、前述した赤外線データを送受信する赤外線送信素子６及び赤外線受信素子７が接続されている。 The electronic indicator 100 further includes a pulse output unit 28 for outputting a pulse according to the integrated value of the electric energy to the outside, and setting data for each setting item such as setting of pulse output and constant setting of CT and VT. An infrared communication control unit 29 that can send and receive to / from an external setting device, a wireless communication unit 30 for reporting the meter reading value and unauthorized use, etc., to an electric power company center, and an alarm issuing unit 40 that issues an alarm I have.
The infrared communication control unit 29 is connected to the infrared transmission element 6 and the infrared reception element 7 that transmit and receive the infrared data described above.
　次に赤外線データ送受信部による端子カバー２の取外し検知モードと、外部設定器とデータ通信を行う赤外線通信モードの切り替え動作について説明する。
　図６は図1の端子カバー２装着状態から図２の端子カバー２取り外し状態へ状態が変化するときの赤外線データ送受信状態図、図７は図２の端子カバー２取り外し状態から図１の端子カバー２装着状態へ状態が変化するときの赤外線データ送受信状態図である。 Next, switching operation between the terminal cover 2 removal detection mode and the infrared communication mode for performing data communication with the external setting device by the infrared data transmission / reception unit will be described.
6 is an infrared data transmission / reception state diagram when the state changes from the terminal cover 2 attached state of FIG. 1 to the terminal cover 2 detached state of FIG. 2, and FIG. 7 is the terminal cover of FIG. 1 from the terminal cover 2 detached state of FIG. It is an infrared data transmission / reception state figure when a state changes to 2 mounting state.
　図３に示すように、赤外線送信素子６から送信された赤外線データは、導光レンズ８ａを介して上部へ誘導され、反射部材９の表面で反射され、導光レンズ８ｂを介して、赤外線受信素子７へ受信する。電子式電力量計１００は、図８に示すように、この動作を一定の間隔で行い、正常に送受信が行われた場合、端子カバー２は装着と検知する。 As shown in FIG. 3, infrared data transmitted from the infrared transmission element 6 is guided upward through the light guide lens 8a, reflected by the surface of the reflecting member 9, and received by the infrared light through the light guide lens 8b. Receive to element 7. As shown in FIG. 8, the electronic watt-hour meter 100 performs this operation at regular intervals, and when the transmission / reception is normally performed, the terminal cover 2 detects that the terminal cover 2 is attached.
　図４に示すように、端子カバー２を取り外すと、赤外線送信素子６から送信された赤外線データは、導光レンズ８ａを介して上部へ導かれるが、その後は反射部材がなく反射されないため、赤外線受信素子７へ赤外線データが誘導されず、赤外線データは受信されない。電子式電力量計１００は、図６に示すように、この赤外線データが受信されない状態になると、端子カバー２が取外し状態になったことを検知する。 As shown in FIG. 4, when the terminal cover 2 is removed, the infrared data transmitted from the infrared transmission element 6 is guided to the upper part through the light guide lens 8a. Infrared data is not guided to the receiving element 7 and no infrared data is received. As shown in FIG. 6, the electronic watt-hour meter 100 detects that the terminal cover 2 has been removed when the infrared data is not received.
　具体的には、計量対象の電路ＰＳＬから入力された電流及び電圧から電力量を含む必要な諸電気量を演算するＣＰＵ２６と前記演算された諸電気量のデータを保存する電力量計量部２４とこの電気量計量部２４に保存された前記諸電気量のデータを外部に送信する出力部２８とを備えた電力量計量機能中枢部を内蔵する電力量計本体部１Ａ、および前記電路ＰＳＬから入力される電流及び電圧を取り込む入力端子１ＢＴを有する端子台１ＢＴＢと前記入力端子１ＢＴを覆う端子カバー２とを備えた端子部１Ｂとを一体に有する電子式電力量計１００であって、前記端子台１ＢＴＢにおける前記入力端子１ＢＴが存在しない部分に形成された設置領域１ＢＴＡ、前記設置領域１ＢＴＡにそれぞれ離間して横並びに並設して配設された赤外線送信素子６および赤外線受信素子７、及び前記端子カバー２の裏面に前記赤外線送信素子６および赤外線受信素子７に対向して配設され前記端子カバー２が閉じている状態において前記赤外線送信素子６から送信された赤外線を反射して前記赤外線受信素子７に入力させる反射部材９を備え、前記端子カバー２が閉じている状態では前記赤外線送信素子６と前記赤外線受信素子７と前記反射部材９とは前記端子カバー２によって覆われており、前記端子カバー２が閉じている状態では前記赤外線入力が行われ前記端子カバー２が開いた或いは外された状態においては前記赤外線入力が行われないという前記赤外線の入力状態から前記端子カバー２が閉じられているか否かの状態を前記ＣＰＵにより判別するものである。 Specifically, a CPU 26 that calculates necessary electric quantities including electric energy from current and voltage input from the electric circuit PSL to be measured, and an electric energy measuring unit 24 that stores data of the calculated electric quantities. An electric energy meter main body 1A having a central portion of an electric energy metering function including an output unit 28 for transmitting the electric quantity data stored in the electric energy meter 24 to the outside, and an input from the electric circuit PSL An electronic watt-hour meter 100 integrally including a terminal block 1BTB having an input terminal 1BT for taking in current and voltage and a terminal portion 1B having a terminal cover 2 covering the input terminal 1BT, An installation area 1BTA formed in a portion of the 1BTB where the input terminal 1BT does not exist, and an infrared ray transmission arranged in parallel and spaced apart from the installation area 1BTA. Transmitting from the infrared transmitting element 6 in a state where the element cover 6 and the infrared receiving element 7 are disposed on the back surface of the terminal cover 2 so as to face the infrared transmitting element 6 and the infrared receiving element 7 and the terminal cover 2 is closed. A reflecting member 9 that reflects the input infrared rays and inputs the reflected infrared rays to the infrared receiving element 7. When the terminal cover 2 is closed, the infrared transmitting element 6, the infrared receiving element 7, and the reflecting member 9 are The infrared ray is covered by the terminal cover 2, and the infrared ray input is performed when the terminal cover 2 is closed, and the infrared ray input is not performed when the terminal cover 2 is opened or removed. The CPU determines whether or not the terminal cover 2 is closed from the input state.
　また、前記赤外線受信素子７への前記赤外線の入力が所定時間存在しないことを前記ＣＰＵ２６が検知した場合、前記赤外線受信素子７への前記赤外線の入力が所定時間存在しないことの情報を外部へ通報するものである。また、前記外部への通報が、異常を通報する異常通報である。 In addition, when the CPU 26 detects that the infrared input to the infrared receiving element 7 does not exist for a predetermined time, it reports to the outside that the infrared input to the infrared receiving element 7 does not exist for a predetermined time. To do. Further, the notification to the outside is an abnormality report for reporting an abnormality.
　また、前記外部へ通報する通信部３０が、前記諸電気量のデータを外部に送信する出力部２８とは別に設けられているものである。また、前記所定時間が、前記通信部３０を介して外部から設定されるものである。 Further, the communication unit 30 for reporting to the outside is provided separately from the output unit 28 for transmitting the data of various electric quantities to the outside. The predetermined time is set from the outside via the communication unit 30.
　また、前記赤外線受信素子７への前記赤外線の入力が所定時間存在しないことを前記ＣＰＵ２６が検知した場合、警報を発する警報発報器４０が前記電力量計本体部１Ａに内蔵されているものである。また、前記所定時間が可変である。 In addition, when the CPU 26 detects that the infrared input to the infrared receiving element 7 does not exist for a predetermined time, an alarm generator 40 that issues an alarm is incorporated in the watt-hour main body 1A. is there. The predetermined time is variable.
　また、前記端子カバー２が閉じている状態では前記入力が行われ前記端子カバー２が開いた或いは外された状態においては前記入力が行われない前記赤外線の入力状態から前記端子カバー２が閉じられているか否かを判別する機能を設定及び解除できるものである。また、前記端子カバーが閉じている状態では前記入力が行われ前記端子カバーが開いた或いは外された状態においては前記入力が行われない前記赤外線の入力状態から前記端子カバーが閉じられているか否かを判別する機能を、前記通信部を介して外部から設定及び解除できるものである。 The terminal cover 2 is closed from the infrared input state where the input is performed when the terminal cover 2 is closed and the input is not performed when the terminal cover 2 is opened or removed. It is possible to set and cancel the function of determining whether or not the user has Whether the terminal cover is closed from the infrared input state where the input is performed when the terminal cover is closed and the input is not performed when the terminal cover is opened or removed. This function can be set and canceled from the outside via the communication unit.
　また、前述の不正配線は、本実施の形態の場合は、端子カバー２を開いて、ＣＴの出力端に接続される入力端子１ＢＴ，１ＢＴ間を導電線で短絡することにより行われる。従って、端子カバー２を開けて行われる不正配線を検知するためにも、本実施の形態では、以下のような端子カバー２の取り外しの検出動作が行われる。 Further, in the case of the present embodiment, the above-described unauthorized wiring is performed by opening the terminal cover 2 and short-circuiting between the input terminals 1BT and 1BT connected to the CT output terminal with a conductive wire. Therefore, in order to detect unauthorized wiring performed by opening the terminal cover 2, the following detection operation for removing the terminal cover 2 is performed in the present embodiment.
　次に、端子カバー２の取り外しの検出動作について説明する。
　図６に示すように、端子カバー２が装着された状態では、赤外線送信素子７より端子カバー２の装着の検知用データが一定の間隔で送信されている。端子カバーが装着されている場合、赤外線送信素子６から送信された検知用データは、反射部材９で反射され、赤外線受信素子７で受信される。端子カバー２が取外された場合、検知用データは、反射部材９で反射されないので、赤外線受信素子７にてデータ受信が行えなくなり、端子カバー２の取外しを検知可能となる。 Next, the detection operation for removing the terminal cover 2 will be described.
As shown in FIG. 6, in a state where the terminal cover 2 is attached, detection data for attachment of the terminal cover 2 is transmitted from the infrared transmission element 7 at regular intervals. When the terminal cover is attached, the detection data transmitted from the infrared transmitting element 6 is reflected by the reflecting member 9 and received by the infrared receiving element 7. When the terminal cover 2 is removed, the detection data is not reflected by the reflecting member 9, so that the infrared receiving element 7 cannot receive data, and the removal of the terminal cover 2 can be detected.
　この端子カバー２の取外しを検知する動作について、図７を用いて詳細に説明する。
　ＣＰＵ２６は、赤外線通信制御部２９から赤外線送信素子６を介して、検知用データを送信し（ステップＳ１１）、検知用データを赤外線受信素子７から赤外線通信制御部２９を介して受信できたかどうかを判断する（ステップＳ１２）。受信できた場合には、カウンタＮをリセットし（ステップＳ１３）、次の検知用データ送信（ステップＳ１１）までの所定時間の待ち処理を行う（ステップＳ１３）。 The operation for detecting the removal of the terminal cover 2 will be described in detail with reference to FIG.
The CPU 26 transmits detection data from the infrared communication control unit 29 via the infrared transmission element 6 (step S11), and determines whether the detection data can be received from the infrared reception element 7 via the infrared communication control unit 29. Judgment is made (step S12). If it can be received, the counter N is reset (step S13), and a waiting process for a predetermined time until the next detection data transmission (step S11) is performed (step S13).
　一方、ステップＳ１２で検知用データが受信できなかった場合には、ステップＳ１５に進み、カウンタＮをカウントアップする積算を行い、次にカウンタＮが第1の所定数を超えたかどうかを判断する（ステップＳ１６）。カウンタＮが第1の所定数を超えていない場合には、ステップＳ１４に進み、次の検知用データ送信（ステップＳ１１）までの所定時間の待ち処理を行う（ステップＳ１３）。カウンタＮが第1の所定数を超えていた場合には、端子カバー２が取り外し検知の処理を行う（ステップＳ１７）。 On the other hand, if the detection data cannot be received in step S12, the process proceeds to step S15, where the counter N is incremented, and it is then determined whether the counter N exceeds the first predetermined number ( Step S16). If the counter N does not exceed the first predetermined number, the process proceeds to step S14 to perform a waiting process for a predetermined time until the next detection data transmission (step S11) (step S13). If the counter N exceeds the first predetermined number, the terminal cover 2 performs removal detection processing (step S17).
　次にステップＳ１８に進み、本来の赤外線通信の目的である外部の設定器からの通信データを受信したかを判断する。設定器からの通信データを受信した場合には、不正な端子カバーの取り外しではないので、処理を終了します。設定器からの通信データを受信しなかった場合には、ステップＳ１９に進み、カウンタＭが第２の所定数を超えていないかどうかを判断する。カウンタＭが第２の所定数を超えていない場合には、ステップＳ２０に進み、カウンタＭをカウントアップする積算処理を行い、ステップＳ１８の設定器からの受信データの判断処理に戻る。 Next, proceeding to step S18, it is determined whether or not communication data from an external setting device, which is the original purpose of infrared communication, has been received. If communication data is received from the setting device, it is not an unauthorized removal of the terminal cover, so the processing ends. If communication data from the setting device has not been received, the process proceeds to step S19, where it is determined whether the counter M has exceeded the second predetermined number. If the counter M does not exceed the second predetermined number, the process proceeds to step S20, an integration process for counting up the counter M is performed, and the process returns to the process for determining the received data from the setter in step S18.
　カウンタＭが第２の所定数を超えていた場合には、ステップＳ２１に進み、不正操作検出処理を行った後、無線通信部３０から外部へ異常通報するとともに、警報出力からアラームを発する。　この一定時間は、予め赤外線データ送受信部から設定できるとともに、別途設けられた通信手段を用いて外部からも設定できる。 If the counter M exceeds the second predetermined number, the process proceeds to step S21, and after performing an unauthorized operation detection process, the wireless communication unit 30 reports an abnormality to the outside and issues an alarm from the alarm output. This fixed time can be set in advance from the infrared data transmitter / receiver, and can also be set from the outside using a separately provided communication means.
　次に通常の赤外線通信を終了し端子カバーを装着する動作について説明する。
　図８に示すように、通常の赤外線通信を終了すると一定の時間（図８では「一定時間」と記載してある）をおいて、端子カバー２が装着されたことを検知するため、検知用データの送信を自動的に開始する。端子カバー２が装着されていれば、赤外線送信素子６から送信された検知用データは、反射部材９で反射され、赤外線受信素子７で受信されるので、端子カバー２の装着状態を検知することができる。前記一定の時間は、予め赤外線データ送受信部から設定できるとともに、別途設けられた通信手段を用いて外部からも設定できる。外部からの設定は、電力量計から遠方の遠隔地に設置された外部の設定器（図示省略）により行われるようにしてもよい。前記外部の設定器の機能は、大きく分類すると、次の３つがある。
（１）電力量計からデータ（電力量、瞬時電力、力率などの計測値）を取得する。
（２）電力量計に内蔵のリレーを制御（開／閉）する。
（３）電力量計に対し、パラメータ（日付・時刻、計量方法（ポストペイドまたはプリペイド）等）を設定する。 Next, the operation of terminating the normal infrared communication and attaching the terminal cover will be described.
As shown in FIG. 8, when normal infrared communication is terminated, a certain time (indicated as “certain time” in FIG. 8) is taken to detect that the terminal cover 2 is attached. Start sending data automatically. If the terminal cover 2 is attached, the detection data transmitted from the infrared transmitting element 6 is reflected by the reflecting member 9 and received by the infrared receiving element 7. Can do. The predetermined time can be set in advance from the infrared data transmitter / receiver, and can also be set from the outside using a separately provided communication means. The setting from the outside may be performed by an external setting device (not shown) installed in a remote place far from the watt-hour meter. The functions of the external setting device are roughly classified into the following three.
(1) Data (measured values such as electric energy, instantaneous electric power, and power factor) are acquired from the electric energy meter.
(2) Control (open / close) the relay built in the watt-hour meter.
(3) Set parameters (date / time, metering method (postpaid or prepaid), etc.) for the electricity meter.
　この端子カバー２の装着を検知する動作について、図９を用いて詳細に説明する。
　ＣＰＵ２６は、赤外線通信制御部２９を介し設定器との赤外線通信が終了（ステップＳ１０１）した後、所定時間の経過待ち処理を行う（ステップＳ１０２）。所定時間が経過したら、カウンタＬをリセットした後（ステップＳ１０３）、赤外線通信制御部２９から赤外線送信素子６を介して、検知用データを送信し（ステップＳ１０４）、検知用データを赤外線受信素子７から赤外線通信制御部２９を介して受信できたかどうかを判断する（ステップＳ１０５）。受信できた場合には、端子カバー２の装着検知の処理を行い（ステップＳ１０６）、本処理は終了し、再度、端子カバー２の取り外しの検出動作に移行する。 The operation for detecting the attachment of the terminal cover 2 will be described in detail with reference to FIG.
After completing the infrared communication with the setting device via the infrared communication control unit 29 (step S101), the CPU 26 performs a waiting process for a predetermined time (step S102). When the predetermined time has elapsed, after the counter L is reset (step S103), the detection data is transmitted from the infrared communication control unit 29 via the infrared transmission element 6 (step S104), and the detection data is transmitted to the infrared reception element 7. Is received through the infrared communication control unit 29 (step S105). If the terminal cover 2 has been received, a process for detecting the attachment of the terminal cover 2 is performed (step S106).
　一方、ステップＳ１０５で検知用データが受信できなかった場合には、ステップＳ１０７に進み、カウンタＬが第３の所定数を超えていないかどうかを判断する。カウンタＬが第３の所定数を超えていない場合には、カウンタＬをカウントアップする積算を行った後（ステップＳ１０８）、次の検知用データを送信する（ステップＳ１０４）。ステップＳ１０７でカウンタＬが第３の所定数を超えた場合には、端子カバー２の装着異常の処理（ステップＳ１０９）を行った後、無線通信部３０から外部へ異常通報するとともに（ステップＳ１１０）、警報出力からアラームを発する。
　上記端子カバー装着の検知用データ送信の開始は、赤外線通信終了時に開始要求のデータ送信をすることでも可能である。 On the other hand, if the detection data cannot be received in step S105, the process proceeds to step S107, and it is determined whether or not the counter L has exceeded the third predetermined number. If the counter L does not exceed the third predetermined number, the counter L is incremented (step S108), and then the next detection data is transmitted (step S104). If the counter L exceeds the third predetermined number in step S107, after processing for abnormal attachment of the terminal cover 2 (step S109), the wireless communication unit 30 reports an abnormality to the outside (step S110). An alarm is issued from the alarm output.
The terminal cover mounting detection data transmission can be started by transmitting a start request data when the infrared communication ends.
　本実施の形態によれば、外部の設定器と通信を行う赤外線データ送受信部２９から赤外線送信素子６を介して送出した検知用データを端子カバー２に設けた反射部材９で反射させ、該検知用データを赤外線受信素子７から赤外線データ送受信部２９で受信することにより端子カバーの有無を検知するので、機械的なスイッチが不要となり端子カバー２の検知の信頼性を向上することができる。 According to the present embodiment, the detection data transmitted from the infrared data transmission / reception unit 29 communicating with the external setting device via the infrared transmission element 6 is reflected by the reflection member 9 provided on the terminal cover 2, and the detection is performed. Since the presence / absence of the terminal cover is detected by receiving the business data from the infrared receiving element 7 by the infrared data transmission / reception unit 29, a mechanical switch is not required and the reliability of detection of the terminal cover 2 can be improved.
　また、外部の設定器と通信を行うために設けた赤外線データ送受信部２９及び赤外線送信素子６、赤外線受信素子７を用いて、端子カバー２の検知を行うスイッチ等が必要なく低コスト化できる。 Further, using the infrared data transmitting / receiving unit 29, the infrared transmitting element 6, and the infrared receiving element 7 provided to communicate with an external setting device, a switch for detecting the terminal cover 2 is not necessary, and the cost can be reduced.
　また、通信用の赤外線を用いて端子カバー２の検知を行うので、端子カバー２の検知を行う部分に孔部を設ける必要がなく防水性能を向上できる。 In addition, since the terminal cover 2 is detected using infrared rays for communication, it is not necessary to provide a hole in the portion where the terminal cover 2 is detected, so that the waterproof performance can be improved.
　なお、本発明は、その発明の範囲内において、実施の形態を適宜、変形、省略することができる。
　なお、各図中、同一符合は同一または相当部分を示す。 In the present invention, the embodiments can be appropriately modified and omitted within the scope of the invention.
In addition, in each figure, the same code | symbol shows the same or an equivalent part.
　１　　電力量計量部、　　　　１Ａ　　電力量計本体部、
　１Ｂ　　端子部、　　　　　　１ＢＴ　　入力端子、
　１ＢＴＡ　　設置領域、　　　１ＢＴＢ　　端子台、
　２　　端子カバー、　　　　　３　　赤外線データ送信部、
　４　　赤外線データ受信部、　５　　赤外線通信用プローブ固定ガイド、
　６　　赤外線送信素子、　　　７　　赤外線受信素子、
　８ａ　導光レンズ、　　　　　８ｂ　導光レンズ、
　９　　反射部材、　　　　　　１０　　カバー、
　２２　　電流入力部、　　　　２３　　電圧入力部、
　２４　　電力量計量部、　　　２５　　表示部、
　２６　　ＣＰＵ、　　　　　　２８　　パルス出力部、
　２９　　赤外線通信制御部、　３０　　無線通信部、
　４０　　警報発報部、　　　　１００　電子式電力量計、
　ＰＳＬ　　電路。 1 Energy meter, 1A Energy meter body,
1B terminal, 1BT input terminal,
1BTA installation area, 1BTB terminal block,
2 Terminal cover, 3 Infrared data transmitter,
4 Infrared data receiver 5 Probe fixing guide for infrared communication,
6 Infrared transmitting element, 7 Infrared receiving element,
8a light guide lens, 8b light guide lens,
9 reflective member, 10 cover,
22 current input section, 23 voltage input section,
24 Electricity meter, 25 Display,
26 CPU, 28 pulse output unit,
29 infrared communication control unit, 30 wireless communication unit,
40 alarm reporting unit, 100 electronic watt-hour meter,
PSL electric circuit.

Claims (10)

  1. 　計量対象の電路から入力された電流及び電圧から電力量を含む必要な諸電気量を演算するＣＰＵと前記演算された諸電気量のデータを保存する電力量計量部とこの電気量計量部に保存された前記諸電気量のデータを外部に送信する出力部とを備えた電力量計量機能中枢部を内蔵する電力量計本体部、および前記電路から入力される電流及び電圧を取り込む入力端子を有する端子台と前記入力端子を覆う端子カバーとを備えた端子部とを一体に有する電子式電力量計において、
    　前記端子台における前記入力端子が存在しない部分に形成された設置領域、
    　前記設置領域にそれぞれ離間して配設された赤外線送信素子および赤外線受信素子、
    　及び前記端子カバーの裏面に前記赤外線送信素子および赤外線受信素子に対向して配設され前記端子カバーが閉じている状態において前記赤外線送信素子から送信された赤外線を反射して前記赤外線受信素子に入力させる反射部材を備え、
    　前記端子カバーが閉じている状態では前記赤外線送信素子と前記赤外線受信素子と前記反射部材とは前記前記端子カバーによって覆われており、
    　前記端子カバーが閉じている状態では前記入力が行われ前記端子カバーが開いた或いは外された状態においては前記入力が行われないという前記赤外線の入力状態から前記端子カバーが閉じられているか否かの状態を前記ＣＰＵにより判別する
    ことを特徴とする電子式電力量計。     A CPU for calculating necessary electric quantities including electric energy from electric current and voltage input from an electric circuit to be measured, an electric energy measuring section for storing data of the calculated electric quantities, and saving in the electric quantity measuring section A watt-hour meter main body portion including a power metering function central portion, and an input terminal for taking in current and voltage inputted from the electric circuit In an electronic watt-hour meter integrally having a terminal block and a terminal portion provided with a terminal cover covering the input terminal,
    An installation area formed in a portion where the input terminal does not exist in the terminal block;
    An infrared transmitting element and an infrared receiving element, which are disposed apart from each other in the installation area,
    And the infrared rays transmitted from the infrared transmitting element are reflected and input to the infrared receiving element when the terminal cover is closed and disposed on the back surface of the terminal cover so as to face the infrared transmitting element and the infrared receiving element. Including a reflective member
    In the state where the terminal cover is closed, the infrared transmitting element, the infrared receiving element, and the reflecting member are covered by the terminal cover,
    Whether the terminal cover is closed from the infrared input state in which the input is performed when the terminal cover is closed and the input is not performed when the terminal cover is opened or removed. The electronic watt-hour meter is characterized in that the state is determined by the CPU.
  2. 　前記赤外線受信素子への前記赤外線の入力が所定時間存在しないことを前記ＣＰＵが検知した場合、前記赤外線受信素子への前記赤外線の入力が所定時間存在しないことの情報を外部へ通報することを特徴とする請求項1に記載の電子式電力量計。 When the CPU detects that the infrared input to the infrared receiving element does not exist for a predetermined time, the CPU notifies the outside of the information that the infrared input to the infrared receiving element does not exist for a predetermined time. The electronic watt-hour meter according to claim 1.
  3. 　前記外部への通報が、異常を通報する異常通報であることを特徴とする請求項２に記載の電子式電力量計。 The electronic watt-hour meter according to claim 2, wherein the notification to the outside is an abnormality report for reporting an abnormality.
  4. 　前記外部へ通報する通信部が、前記諸電気量のデータを外部に送信する出力部とは別に設けられていることを特徴とする請求項２または請求項３に記載の電子式電力量計。 The electronic watt-hour meter according to claim 2 or 3, wherein a communication unit for reporting to the outside is provided separately from an output unit for transmitting the data of various electric quantities to the outside.
  5. 　前記所定時間が、前記通信部を介して外部から設定されることを特徴とする請求項４に記載の電子式電力量計。 The electronic watt-hour meter according to claim 4, wherein the predetermined time is set from the outside via the communication unit.
  6. 　前記赤外線受信素子への前記赤外線の入力が所定時間存在しないことを前記ＣＰＵが検知した場合、警報を発する警報発報器が前記電力量計本体部に内蔵されていることを特徴とする請求項1または請求項３に記載の電子式電力量計。 The watt-hour meter main body includes a warning generator that issues a warning when the CPU detects that the infrared input to the infrared receiving element does not exist for a predetermined time. The electronic watt-hour meter of Claim 1 or Claim 3.
  7. 　前記所定時間が可変であることを特徴とする請求項1に記載の電子式電力量計。 2. The electronic watt-hour meter according to claim 1, wherein the predetermined time is variable.
  8. 　前記所定時間が可変であることを特徴とする請求項５に記載の電子式電力量計。 The electronic watt-hour meter according to claim 5, wherein the predetermined time is variable.
  9. 　前記端子カバーが閉じている状態では前記入力が行われ前記端子カバーが開いた或いは外された状態においては前記入力が行われない前記赤外線の入力状態から前記端子カバーが閉じられているか否かを判別する機能を設定及び解除できることを特徴とする請求項５に記載の電子式電力量計。 Whether the terminal cover is closed from the infrared input state where the input is performed when the terminal cover is closed and the input is not performed when the terminal cover is opened or removed. 6. The electronic watt-hour meter according to claim 5, wherein a function to be discriminated can be set and canceled.
  10. 　前記端子カバーが閉じている状態では前記入力が行われ前記端子カバーが開いた或いは外された状態においては前記入力が行われない前記赤外線の入力状態から前記端子カバーが閉じられているか否かを判別する機能を、前記通信部を介して外部から設定及び解除できることを特徴とする請求項５に記載の電子式電力量計。 Whether the terminal cover is closed from the infrared input state where the input is performed when the terminal cover is closed and the input is not performed when the terminal cover is opened or removed. The electronic watt-hour meter according to claim 5, wherein the function to be determined can be set and canceled from the outside via the communication unit.
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