JP6024944B2 - Electronic watt-hour meter inspection system and inspection method - Google Patents

Description

  The present invention relates to an inspection system and an inspection method for inspecting an electronic watt-hour meter, and more particularly to an inspection system and an inspection method for remotely inspecting a watt-hour meter.

  When a detached house or condominium is newly built, or when a watt hour meter is replaced due to a failure or inspection (expiration expiration), a new watt hour meter is attached. A consumer who receives power supply from the grid pays an electricity charge according to the amount of power used to the power supply company. A watt hour meter is installed to measure the power consumption. Specifically, power from the grid is supplied to a consumer load (for example, indoor wiring, distribution board, etc.) via a watt-hour meter, and the watt-hour meter displays a cumulative value of used power. Then, the power supplier confirms the indicated value of this watt-hour meter every predetermined period, recognizes the amount of power used in that period with the difference from the previous indicated value, and demands the electricity bill corresponding to this. Bill home.

  Usually, after the installation work of the watt hour meter is newly performed, the operation confirmation work of the watt hour meter is performed. Specifically, a load is generated on the load side (for example, indoors) with respect to the watt hour meter, and it is confirmed whether or not a power flow from the system to the load is generated via the watt hour meter. This confirmation is done by checking whether the disk is rotating when the watt-hour meter is a mechanical watt-hour meter, and by flashing the operation display liquid crystal attached to the watt-hour meter when it is an electronic watt-hour meter. It is done depending on the presence or absence.

  By the way, in recent years, an electronic watt-hour meter has come to be frequently used as a newly installed watt-hour meter. FIG. 13 shows a schematic diagram of an electronic watt-hour meter. The electronic watt-hour meter 10 includes a liquid crystal display unit 11. The liquid crystal display unit 11 includes a region for displaying the accumulated power amount (power amount display unit 13) and a region for flashing the liquid crystal display during operation (operation display unit 15). In addition, an infrared pulse output unit 17 used at the time of verification is provided outside the liquid crystal display unit 11. When a tidal current from the system toward the customer load is generated, the liquid crystal display of the operation display unit 15 blinks at predetermined time intervals.

  For example, when a new electronic watt-hour meter is installed in a newly-built house, the operation check operation of the watt-hour meter has conventionally been performed according to the following procedure. First, a device incorporating an electrical load called a comprehensive judgment device or meter checker is connected to the load side of the watt-hour meter, and a load is intentionally generated to generate a power flow from the system to the load. Then, the worker visually confirms the blinking display of the operation display unit 15, and takes a picture of the lighting state of the operation display unit 15 as evidence.

  However, the display blinking cycle in the operation display unit 15 of the electronic watt-hour meter 10 is set to be longer as the load is lighter. Furthermore, the above-mentioned comprehensive determination device is configured to be unable to continuously flow a current for a long time (for example, 30 seconds or more) because it is downsized in consideration of convenience in carrying. . For example, when a 500 W load is applied by the general determination device, the operation display unit 15 starts to be turned on 12 seconds after the load is applied, and thereafter, lighting and extinction are repeated every 12 seconds. In this case, it is necessary for the worker to take a load and photograph the lighting state together with visual confirmation, and it may be difficult to perform this operation within 30 seconds. In this case, it is necessary to remove the load, connect the load again, and start the work from the beginning, which is problematic in terms of workability.

  In view of such a problem, the following Patent Document 1 includes an electronic watt-hour meter inspecting device in which an LED is continuously lit when a power flow is generated in the correct direction by being attached from the outside of the electronic watt-hour meter. It is disclosed.

Japanese Utility Model Publication No. 7-8777

  According to the technique of Patent Document 1, when the general determination device is connected to the watt hour meter, the LED provided in the inspection device is continuously lit if the watt hour meter is correctly connected. Thereby, the worker can easily visually check that the watt-hour meter is correctly connected.

  By the way, in apartment buildings such as newly built apartments, when performing watt-hour meter operations, lighting fixtures must already be installed in designated places such as toilets and water areas when indoor wiring is completed. There are many. In this case, for example, a load is generated simply by raising the breaker and turning on these lights, so that a tidal current is generated indoors from the system side. Therefore, it is not necessary to bother the general determination device to connect to the watt hour meter in order to check the operation of the watt hour meter. Also, when replacing the watt hour meter due to validation or failure, since there is already an environment where consumers have already consumed electricity, indoor lighting is turned on in the same way, or some electrical equipment is turned on. A load can be generated by driving.

  Here, when a consumer is already on the consumer side, such as a watt-hour meter replacement due to validation or failure, the worker will turn on the lighting equipment or start the operation of the electrical equipment. Upon request, the worker himself can confirm the operation of the watt hour meter in front of the watt hour meter. However, if there are no other people, such as a newly built condominium, and there are no other people indoors, the worker goes indoors, raises the breaker, turns on the lights, then goes outside. You must move to the watt-hour meter to check the operation of the watt-hour meter. In a newly built apartment building, it is necessary to perform such an operation check on each room. Therefore, there is a problem of simplifying the work of the worker as much as possible in order to improve the work efficiency and the work time. However, the technique of Patent Document 1 cannot solve such a problem.

  In view of such a problem, an object of the present invention is to provide an inspection device, an inspection system, and an inspection method capable of easily confirming the operation of a watt hour meter even at a place away from the watt hour meter.

  The present invention relates to an inspection system for an electronic watt-hour meter including a transmitter and a receiver. The transmitter includes an attachment portion for attachment to the housing of the electronic watt-hour meter, and an infrared ray that receives an infrared signal output from the electronic watt-hour meter when a power flow from the system to the consumer load occurs. A light receiving unit; and a wireless signal transmitting unit that transmits a wireless signal when the infrared light receiving unit receives the infrared signal. The receiver includes a wireless signal receiving unit that receives the wireless signal, and a first display output unit that performs a predetermined display output when the wireless signal is received by the wireless signal receiving unit.

  In such a configuration, the worker goes to the installation site of the electronic watt-hour meter to be inspected, carrying the transmitter and the receiver. And the attachment part of a transmitter is attached to the housing | casing of an electronic watt-hour meter. At this time, it arrange | positions so that the infrared signal output from an electronic watt-hour meter may become a positional relationship which can be light-received by the infrared light-receiving part of a transmitter.

  Then, the worker carries the receiver and enters an area (for example, indoors) where the customer load is installed, and connects this customer load to the system. Thereby, when the electronic watt-hour meter is correctly wired, a tidal current is generated from the system toward the customer load via the electronic watt-hour meter. At this time, the electronic watt-hour meter starts outputting infrared signals.

  When the transmitter detects the infrared signal in the infrared light receiver, the transmitter transmits a wireless signal from the wireless signal transmitter. At this time, the receiver carried by the worker detects this radio signal in the radio signal receiving unit, and performs a predetermined display output in the first display output unit. The operator can recognize that the electronic watt hour meter is correctly wired by visually confirming this display output of the portable receiver.

That is, according to this inspection system, worker, in order to connect the customer load to the system, after entering the area where customer load is installed, after returning to the previous power meter further customer Wiring inspection of the electronic watt-hour meter can be performed without turning off the load and returning indoors. Thereby, the work man-hours and work time of the worker can be shortened.

  Under this configuration, the transmitter transmits the radio signal with identification information attached to the transmitter in advance from the radio signal transmitter, and the receiver transmits the radio signal transmitted from the transmitter. Only when the identification information included in the signal is associated with the receiver in advance, the first display output unit may perform the display output.

  This configuration is useful when, for example, in a large-scale apartment, a plurality of workers simultaneously perform wiring inspection of an electronic watt-hour meter in another room. In other words, even if the receiver receives a radio signal from a transmitter installed in an electronic watt-hour meter in another room, the identification information attached to this signal is associated with the receiver. If it is not, there is no possibility that display output is performed in the first display output unit based on the signal.

  Therefore, by adopting such an aspect, even when a wiring inspection of an electronic watt-hour meter is performed in an area where a radio signal from another transmitter can be received, the electronic electric energy to be inspected Inspection based on the radio signal from the transmitter attached to the meter can be performed correctly.

  In the above configuration, the first display output unit may be configured by a light source (for example, an LED).

  When configured with a light source, the worker can confirm the wiring of the electronic watt-hour meter by confirming the lighting of the light source of the receiver. As a result, simplification of confirmation and easy photography as evidence can be realized.

  In this case, the lighting color when the power of the receiver is turned on and the lighting color when the radio signal from the transmitter associated with the identification information is correctly detected may be changed. The light sources that are turned on may be provided individually.

  In the above configuration, the transmitter may include a second display output unit that performs a predetermined display output when the infrared light receiving unit receives an infrared signal output from the electronic watt-hour meter. .

  By adopting such a configuration, for example, even if there is some trouble in the wireless signal transmission unit or receiver of the transmitter, the worker goes to the front of the electronic watt-hour meter and the second display output By visually confirming the display output of the unit, it can be recognized that the electronic watt-hour meter is correctly wired.

  In the above configuration, the second display output unit may be configured by a light source (for example, an LED).

  In this case, the lighting color when the transmitter power is turned on and the lighting color when the infrared light receiving unit detects an infrared signal from the electronic watt-hour meter may be changed. You may provide the light source to light individually.

An inspection method for an electronic watt-hour meter according to the present invention is an inspection method for an electronic watt-hour meter installed in a power consumer in a form in which power is supplied from a system to a consumer load via the electronic watt-hour meter. Then, the above-described inspection system for electronic watt-hour meter is used,
With the infrared light receiving unit of the transmitter set to a position where the infrared signal output from the electronic watt hour meter can be received, the mounting portion of the transmitter is set to the electronic watt hour meter. A first step of attaching to the housing;
A second step of connecting the customer load to the grid after the first step;
After the second step, there is a third step of confirming whether or not the predetermined display output is made on the first display output unit of the receiver.

  Here, the receiver may be carried around from the first step to the third step. In the second to third steps, the receiver may be used indoors. As an example, if the power source of the receiver is a built-in battery type or a dry battery, the receiver can be carried through the first to third steps. Further, if the receiver is configured to use a commercial power source as a power source, the second to third steps may be used with the receiver placed indoors or the like.

In addition, an attachment part for attaching to the housing of the electronic watt-hour meter, an infrared light receiving part for receiving an infrared signal output from the electronic watt-hour meter at the time of generation of a tidal current from the system toward a consumer load, and When the infrared light receiving unit receives the infrared signal output from the electronic watt-hour meter, using two electronic watt meter tester that includes a display output unit for performing a predetermined display output, excess power An electronic watt-hour meter can be inspected by a consumer with a distributed power source that can generate a reverse power flow by the following method.

In other words, a power flow from the grid to the customer load occurs in this order through the electronic watt-hour meter for power supply and the electronic watt-hour meter for surplus power, and the generated power in the distributed power source exceeds the power consumption. In this case, the electronic power for a consumer in a power receiving form that can generate a reverse power flow toward the system through the electronic power meter for surplus power and the electronic power meter for power supply in this order from the distributed power source In the inspection method of the meter,
The electronic watt-hour meter for supplying power outputs an infrared signal when a power flow from the grid toward the customer load occurs, and the electronic watt-hour meter for surplus power is reversed from the distributed power source toward the grid. An infrared signal is output when a tidal current occurs,
One of said electronic watt meter tester, attached to the housing of the power supply electronic power meters so that the reception is possible in the infrared signal outputted from the power supply electronic power meter and the other of said electronic watt meter tester, the housing of the said as the reception of the infrared signal can be outputted from the surplus power for electronic power meter surplus power electronic power meter In the attached state, a load is connected to the load side of the surplus power electronic watt-hour meter.

In this way, two electronic whether it is test two power meter just are routed correctly to confirm the display mode of the display output section of the power meter inspection instrument. That is, the display output only the display output section of the mounted on the housing of the power supply for an electronic watt-hour meter electronic watt meter tester is made, attached to the housing for excess power electronic power meter and the display output portion of the electronic watt meter inspector has is wired correctly if the display output is not performed. And when it is a display output mode other than this, possibility that it is not wired correctly is high.

  A consumer with a distributed power source needs to install two watt-hour meters, an electronic watt-hour meter for power supply and an electronic watt-hour meter for surplus power. Moreover, the former needs to be wired so that the amount of power is measured when the power flow from the grid to the consumer load occurs, and the latter is the power measurement when the reverse power flow from the distributed power source to the system occurs. Wiring needs to be done as is done. As described above, since the wiring of the watt hour meter becomes complicated, the possibility of erroneous wiring is increased as compared with the case of a normal customer who does not have a distributed power source.

  According to the above method, the worker can inspect such complicated wiring simply by visually confirming the display output mode of the display output unit of the inspector installed in the two watt-hour meters. The content is simplified. In particular, when the display output unit is composed of LEDs, it can be confirmed that the correct wiring is provided if it is confirmed that only the LED on the electronic watt-hour meter for power supply is lit.

  According to the inspection system and the inspection method for an electronic watt-hour meter of the present invention, it is possible to check the operation of the watt-hour meter even at a location away from the watt-hour meter. Time can be shortened.

It is a conceptual diagram at the time of performing the wiring inspection of an electronic watt-hour meter using an inspection system. It is a schematic diagram which shows the structure of a transmitter. It is a typical block diagram which shows the internal structure of a transmitter. It is a schematic diagram which shows the structure of a receiver. It is a typical block diagram which shows the internal structure of a receiver. It is a schematic diagram which shows another structure of a transmitter. It is a schematic diagram which shows another structure of a transmitter. It is a schematic diagram which shows another structure of a receiver. It is a conceptual diagram at the time of performing the wiring inspection of the electronic watt-hour meter in the consumer provided with the distributed power supply using an inspection device. It is a typical block diagram which shows the correct connection state of the electronic watt-hour meter in the consumer provided with the distributed power supply. It is the figure which showed the test result assumed when conducting the wiring test | inspection of the electronic watt-hour meter in the consumer provided with the distributed power supply using the test | inspection device. It is another conceptual diagram at the time of performing the wiring inspection of the electronic watt-hour meter in the consumer provided with the distributed power source using the inspection device. It is a schematic diagram of an electronic watt-hour meter.

  An inspection system and an inspection method according to the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a conceptual diagram when an electronic watt-hour meter is inspected using an inspection system. Electric power is supplied from the system 22 to the customer load 23 via the electronic watt-hour meter 10. At this time, the watt-hour meter 10 displays a numerical value corresponding to the power consumption amount in the consumer load 23 on the power amount display unit 13. In FIG. 1, it is assumed that the consumer load 23 is an indoor load. However, the load is limited to an indoor load as long as the load is connected to the consumer side from the electronic watt-hour meter 10. Not.

  The inspection system of the present invention includes a transmitter 1 and a receiver 2. Below, after demonstrating the structure of each apparatus first, the test | inspection procedure of the watt-hour meter which a worker performs is demonstrated.

[Transmitter]
FIG. 2 is a schematic diagram showing the configuration of the transmitter. 2A is a front view, FIG. 2B is a side view, and FIG. 2C is a rear view.

  The transmitter 1 includes a housing 31, a mounting portion 33, a power switch 35, and an infrared light receiving portion 37. The infrared light receiving portion 37 is attached to the same side as the attachment portion 33. At the time of inspection, the attachment portion 33 of the transmitter 1 is bonded to the housing 20 of the electronic watt-hour meter 10. At this time, the attachment portion 33 of the transmitter 1 is adhered in a state where the infrared light receiving portion 37 is opposed to the infrared pulse output portion 17 of the electronic watt-hour meter 10 used at the time of verification.

  In addition, in FIG. 2, the case where the attachment part 33 is comprised by a suction cup is illustrated in figure, However, if it is the structure which adhere | attaches stably for a fixed time and is easily removable, it will not be restricted to a suction cup, You may be comprised with the magnet, the metal fitting for attachment, etc. Further, the transmitter 1 has a housing 20 of the electronic watt-hour meter 10 at a position within a range where infrared light from the infrared pulse output unit 17 of the electronic watt-hour meter 10 can be received by the infrared light-receiving portion 37. It only has to be fixed to. For this reason, the housing 20 and the main body of the transmitter 1 do not necessarily need to be in close contact with each other, and may be configured to be fixed to the electronic watt-hour meter 10 with a separation within the above range. . As an example, the housing 20 of the electronic watt-hour meter 10 has a mounting bracket that can be built in when not in use, and this bracket protrudes from the housing 20 to the outside so that the mounting portion 33 of the transmitter 1 (here, It is good also as a structure which fixes the transmitter 1 to the housing | casing of the electronic watt-hour meter 10 by meshing | engaging the metal fitting of the said housing | casing 20).

  FIG. 3 is a schematic block diagram showing the internal configuration of the transmitter 1. The transmitter 1 includes an infrared light receiving unit 37, a control unit 39, a power supply 41, a power switch 35, and a wireless signal transmission unit 43.

  When the power switch 35 is turned on, a voltage is supplied from the power supply 41 to the control unit 39. When detecting the infrared pulse (corresponding to “infrared signal”) from the infrared pulse output unit 17 of the electronic watt-hour meter 10, the infrared light receiving unit 37 outputs a detection signal to the control unit 39. The control unit 39 generates a predetermined signal with the input of the detection signal as a trigger, and causes the radio signal transmission unit 43 to output the signal via a radio wave.

  Here, the predetermined signal is configured to include information indicating that the electronic watt-hour meter 10 is correctly connected and information related to identification information (ID) previously attached to the transmitter 1. This ID can be represented by 16-bit information as an example.

[Receiving machine]
FIG. 4 is a schematic diagram showing the configuration of the receiver. 4A is a front view, and FIG. 4B is a side view.

  The receiver 2 includes a housing 51, a wireless signal receiving unit 53, a power switch 55, and a display output unit 57.

  FIG. 5 is a schematic block diagram showing the internal configuration of the receiver 2. A wireless signal receiving unit 53, a control unit 61, a power supply 63, a power switch 55, and a display output unit 57 are provided. The display output unit 57 corresponds to a “first display output unit”.

  When the power switch 55 is turned on, a voltage is supplied from the power source 63 to the control unit 61. When the wireless signal receiving unit 53 detects the wireless signal transmitted from the wireless signal transmitting unit 43 of the transmitter 1, the wireless signal receiving unit 53 outputs the signal to the control unit 61. The control unit 61 checks whether or not the identification information (ID) attached to the signal corresponds to an ID that can be received by the receiver 2. To give a predetermined display output. Here, in FIG.4 and FIG.5, although LED display is assumed as the display output part 57, you may be comprised with another light source. At this time, when a wireless signal including the corresponding identification information is sent from the transmitter 1, the LED provided in the receiver 2 is turned on. Note that the control unit 61 may internally store a list of identification information of the transmitter 1 that can be received by the receiver 2 in advance.

[Inspection procedure]
Hereinafter, the work procedure when the worker inspects the electronic watt-hour meter 10 will be described.

  A worker carries the transmitter 1 and the receiver 2 and goes to the installation site of the electronic watt-hour meter 10 to be inspected. At this time, it is assumed that the identification information of the transmitter 1 is stored in advance in the control unit 61 of the receiver 2 as being compatible.

  After turning on the power switch 35 of the transmitter 1, the worker attaches the attachment portion 33 to the housing 20 of the electronic watt-hour meter 10. At this time, as described above, the position of the transmitter 1 is adjusted and bonded so that the infrared light receiving unit 37 faces the infrared pulse output unit 17 of the electronic watt-hour meter 10. Of course, the power switch 35 may be turned on after the transmitter 1 is bonded to the housing 20 of the electronic watt-hour meter 10.

  Next, the worker carries the receiver 2 with the power switch 55 turned on and enters the house, and connects the customer load 23 to the system 22 by raising the breaker or turning on the indoor lighting switch, for example. . When the electronic watt-hour meter 10 is correctly connected, a tidal current is generated from the system 22 toward the customer load 23 via the electronic watt-hour meter 10. At this time, the electronic watt-hour meter 10 starts blinking on the operation display unit 15 and starts outputting infrared pulses from the infrared pulse output unit 17.

  When the infrared light receiving unit 37 of the transmitter 1 detects the infrared pulse output from the infrared pulse output unit 17, it outputs a detection signal to the control unit 39. At this time, as described above, the control unit 39 causes the wireless signal transmission unit 43 to wirelessly output the signal including the identification information given to the transmitter 1 and information indicating that the infrared pulse has been detected.

  When the radio signal receiving unit 53 detects the radio signal transmitted from the radio signal transmission unit 43 of the transmitter 1, the receiver 2 carried by the worker transmits this signal to the control unit 61. The control unit 61 confirms whether or not the identification information included in the signal matches that stored in advance in the receiver 2 as something that can be handled. When the correspondence is confirmed, the control unit 61 causes the display output unit 57 to perform a predetermined display output. Specifically, an LED provided in the housing 51 is turned on. The worker can recognize that the electronic watt-hour meter 10 is correctly connected by visually confirming the lighting of the LED. Evidence can be easily obtained by taking a picture of the lighting state of the LED.

  In addition, when the LED is not lit, the worker can recognize that the electronic watt-hour meter 10 may be erroneously connected.

  According to this configuration, after the transmitter 1 is bonded (fixed) to the housing 20 of the electronic watt-hour meter 10, the worker only enters the house once and connects the customer load 23 to the system 22. Thus, the wiring inspection of the electronic watt-hour meter 10 can be performed at that place. Thereby, after entering indoors and connecting a load, it is not necessary to go outside again for confirmation and go to the front of the electronic watt-hour meter 10, thereby reducing the work burden on the worker.

  In the above-described embodiment, the receiver 2 is carried by an operator after the transmitter 1 is bonded to the housing 20 until the display on the display output unit 57 of the receiver 2 is confirmed. As explained. However, after connecting the consumer load 23 to the system 22, if the display mode of the display output unit 57 of the receiver 2 can be confirmed indoors, the receiver 2 must always be carried with the mobile phone. Absent.

[Other configuration]
Hereinafter, another configuration of the first embodiment will be described.

  <1> FIG. 6 is a schematic diagram showing another configuration of the transmitter. The transmitter 1 illustrated in FIG. 6 is configured to further include a display output unit 32. Here, although LED is employ | adopted as the display output part 32, you may be comprised with another light source. 6, (a) is a front view, (b) is a side view, and (c) is a rear view, as in FIG. The display output unit 32 corresponds to a “second display output unit”.

  When the display output unit 32 is configured by an LED, for example, when the power switch 35 is turned on, the LED is lit in a predetermined color (for example, green) if the power source 41 has a remaining amount. The operator can recognize that the power is correctly supplied to the transmitter 1 by visually confirming the green lighting of the LED.

  Furthermore, when the infrared light receiving unit 37 detects an infrared pulse from the infrared pulse output unit 17, the lighting color of the LED may be changed to another color (for example, red). By adopting such a configuration, for example, even if there is some trouble on the wireless signal transmission unit 43 or the wireless device 2 side of the transmitter 1, the worker goes to the front of the electronic watt-hour meter 10. By visually confirming the red lighting of the LED, it can be recognized that the electronic watt-hour meter 10 is correctly wired.

  The display output unit 32 may include an LED 32A that is turned on when the power switch 35 is turned on and an LED 32B that is turned on when an infrared pulse is detected (see FIG. 7). FIG. 7 schematically shows an example of a front view of this configuration. Naturally, the arrangement positions of the LEDs 32A and 32B are not limited to the illustrated form of FIG.

  <2> Similar to the other configuration of the transmitter 1, in the LED constituting the display output unit 57 of the receiver 2, the transmitter with the LED lighting color and the corresponding ID attached when the power switch 55 is turned on. The LED lighting color when the wireless signal from 1 is correctly detected may be changed. Further, an LED 57A that is turned on when the power switch 55 is turned on, and an LED 57B that is turned on when a radio signal from the transmitter 1 with the corresponding identification information is correctly detected may be provided separately (FIG. 8). FIG. 8 schematically shows an example of a front view of this configuration. Naturally, the arrangement positions of the LEDs 57A and 57B are not limited to the illustrated form of FIG.

  <3> In both the transmitter 1 and the receiver 2, the mode of the display output unit is not limited to the LED. For example, the display output unit 32 and the display output unit 57 may be configured by a liquid crystal screen, and some characters, numbers, symbols, or combinations thereof may be displayed on the screen. Of course, you may provide a liquid crystal screen with LED.

  <4> In the above-described embodiment, identification information is attached to the transmitter 1 in advance, and the receiver 2 confirms and displays that the signal is a radio signal from the transmitter 1 to which the corresponding identification information is attached. The output unit 57 is configured to perform display output. This is useful when, for example, in a large-scale condominium or the like, a plurality of workers simultaneously perform a wiring inspection of the electronic watt-hour meter 10 in another room. In other words, with this configuration, even if the receiver 2 receives a radio signal from the transmitter 1 installed in the electronic watt-hour meter 10 in another room, it is attached to this signal. If the identified information does not correspond to the receiver 2, there is no possibility that the display output unit 57 performs display output based on the signal.

  That is, the worker needs to carry out the wiring inspection of the electronic watt-hour meter 10 by carrying the transmitter 1 and the receiver 2 to which the corresponding identification information is attached. By adopting such an aspect, even when the wiring inspection of the electronic watt-hour meter 10 is performed in an area where a radio signal from another transmitter 1 can be received, the electronic electric energy to be inspected The inspection based on the radio signal from the transmitter 1 attached to the total 10 can be correctly performed.

  Conversely, when the wiring inspection of the electronic watt-hour meter 10 is not performed in an area where a radio signal from another transmitter 1 can be received, the receiver 2 does not necessarily transmit the transmission signal from the transmitter 1. It is not necessary to check whether the identification information corresponding to is attached. That is, in this case, it is not necessary to previously store identification information of the transmitter 1 that can be handled by the receiver 2, and it is not necessary to attach identification information to the transmitter 1.

  <5> In the above-described embodiment, it is assumed that the operator carries a set of the transmitter 1 and the receiver 2 specialized for the wiring inspection of the electronic watt-hour meter 10 on the site. However, the receiver 2 only needs to have a function of detecting a radio signal from the transmitter 1 and a function of displaying and outputting that effect when correctly detected. For this reason, for example, when a radio signal from the transmitter 1 can be received by a mobile phone, PHS, mobile PC, or the like, such a device may be used as the receiver 2.

  <6> The receiver 2 may register the identification information of a plurality of transmitters 1. With this configuration, it is possible to reduce the number of receivers 2 to be provided in a business office (office) that is a dispatch source of workers. The receiver 2 needs to include a wireless signal receiving unit 53 for remotely receiving a wireless signal from the transmitter 1. For example, this is configured with an antenna, and thus becomes more expensive than the transmitter 1. Therefore, by adopting this configuration, the cost of the operator can be suppressed.

[Second Embodiment]
By using the transmitter 1 as an inspection device for an electronic watt-hour meter, it can be applied to an inspection of an electronic watt-hour meter having a distributed power source such as solar power generation. Hereinafter, this aspect will be described. In the present embodiment, as illustrated in FIG. 6, a case where the transmitter 1 is configured to include the display output unit 32 will be described as an example.

  FIG. 9 is a conceptual diagram when performing a wiring inspection of an electronic watt-hour meter in a consumer equipped with a distributed power source using an inspection device. Electric power is supplied from the system 22 to the customer load 23 through the electronic watt-hour meters 10A and 10B in this order. On the other hand, when power is generated by the distributed power source 24, electric power is supplied from the power source 24 to the consumer load 23. If the power consumption at the consumer load 23 is lower than the power generated by the distributed power source 24, the electronic power amount A reverse power flow is generated in the grid 22 through the total 10B and 10A in this order.

  The electronic watt-hour meter 10A is a watt-hour meter that displays a numerical value corresponding to the amount of power consumed from the grid 22 in the consumer on the power amount display unit 13, and corresponds to a watt-hour meter for power supply. On the other hand, the electronic watt-hour meter 10 </ b> B is a watt-hour meter that displays a numerical value corresponding to the amount of power reversely flowing from the distributed power source 24 installed by the consumer to the system 22 on the power amount display unit 13. That is, it is a watt-hour meter that measures the amount of power related to the reverse power flow that occurs when surplus power is generated on the consumer side, and corresponds to a surplus power watt-hour meter.

  The watt-hour meter for supplying power and the watt-hour meter for surplus power are different in the direction of the tidal current that increases the numerical value displayed on the power amount display unit 13. For this reason, wiring is more complex than wiring a watt hour meter to a general consumer who does not have a distributed power source, and more careful inspection is required. FIG. 10 is a schematic block diagram showing a correct connection state of an electronic watt-hour meter in a consumer equipped with a distributed power source.

  As shown in FIG. 10, in the power supply watt-hour meter 10A, the first terminal (S terminal) is connected to the system 22, and the second terminal (L terminal) is connected to the L terminal of the surplus power watt-hour meter 10B. Connecting. In surplus power watt-hour meter 10B, the S terminal is connected to consumer load 23, and the L terminal is connected to the L terminal of power supply watt-hour meter 10A.

  In FIG. 10, the direction of the tidal current when power is supplied from the grid 22 toward the load 23 is indicated by solid arrows. Moreover, the direction of the reverse power flow when the generated power of the distributed power source 24 exceeds the power consumption at the load 23 and surplus power is generated is indicated by a dashed arrow.

  Both the measurement unit 12A of the watt-hour meter for power supply 10A and the measurement unit 12B of the watt-hour meter for surplus power 10B measure only the amount of power related to the power flow from the S terminal to the L terminal, and from the L terminal to the S terminal. We do not measure the tidal current. By setting the wiring state shown in FIG. 9 and FIG. 10, the power supply watt-hour meter 10A measures only the power amount related to the power flow from the grid 22 toward the customer load 23, and the surplus power watt-hour meter 10B Only the amount of electric power related to the reverse power flow from the distributed power source 24 toward the grid 22 is measured.

  When an operator conducts a wiring inspection of these watt-hour meters at the site where such two watt-hour meters are installed, first, the transmitter 1 described above in the first embodiment is installed in both watt-hour meters. Hereinafter, the transmitter 1 installed in the watt-hour meter 10A for power supply is referred to as “transmitter 1A”, and the transmitter 1 installed in the watt-hour meter 10B for surplus power is referred to as “transmitter 1B”. Since the installation mode is the same as that of the first embodiment, the description thereof is omitted. Then, as illustrated in FIG. 9, the comprehensive determination device 71 is connected to the L terminal of the surplus power watt-hour meter 10 </ b> B.

  The comprehensive judgment device 71 incorporates a load and an internal power supply. When the worker turns on the power switch of the general determination device 71, an LED indicating that there is a power supply blinks. After that, a load built in the comprehensive judgment unit 71 is connected, and a power flow is generated.

  As described above, the case where the general determination device 71 is connected assumes a state where the customer load 23 is not yet connected to the system 22. That is, in this case, the generated power of the distributed power supply 24 is not sent to the system 22. When the general determination device 71 is connected in this state, a power flow from the S terminal to the L terminal is generated in the measurement unit 12A of the power supply watt-hour meter 10A. At this time, the display output unit 32 (LED) of the transmitter 1A adhered to the watt-hour meter 10A for power supply is turned on. On the other hand, since a power flow from the L terminal to the S terminal is generated in the measurement unit 12B of the surplus power watt-hour meter 10B, the measurement unit 12 does not measure the electric energy related to the power flow. That is, the display output unit 32 (LED) of the transmitter 1B bonded to the surplus power watt-hour meter 10B is not lit.

  Therefore, as shown in FIG. 11, if the LED of the transmitter 1A bonded to the power supply watt-hour meter 10A is lit, both watt-hour meters are correctly wired, In modes 2, 3, and 4, there is a possibility that there is an error in the wiring.

  By adopting such a configuration, the worker can check an incorrect wiring of the watt-hour meter by confirming the lighting state of the LED of the inspection device (transmitter 1) installed in the two watt-hour meters. As a result, the confirmation work is simplified.

  Note that the electronic watt-hour tester used in the inspection of this embodiment shown in FIG. 9 does not necessarily require a transmission function. That is, the inspection device in the present embodiment may be configured to include the attachment portion 33, the infrared light receiving portion 37, and the display output portion 57, and the wireless signal transmission portion 43 shown in FIG. 3 is not necessarily required.

[Other configuration]
Hereinafter, another configuration of the second embodiment will be described.

  Similarly to the first embodiment, it is possible to carry out the wiring inspection by carrying the two receivers 2A and 2B without using the comprehensive judging device. In this case, the receiver 2A is associated with the identification information of the transmitter 1A in advance, and is not associated with the identification information of the transmitter 1B. On the other hand, the receiver 2B is associated with the identification information of the transmitter 1B in advance, and is not associated with the identification information of the transmitter 1A.

  Under this configuration, as shown in FIG. 12, the receivers 2 </ b> A and 2 </ b> B are carried and the customer load 23 is connected to the system 22. In this case, since a tidal current from the system 22 toward the customer load 23 is generated, if the watt hour meters 10A and 10B are correctly wired, a radio signal is output only from the transmitter 1A installed in the watt hour meter 10A. The Since the identification information corresponding to the transmitter 1A is attached to this signal, the receiver 2A receives the radio signal and performs display output to that effect on the display output unit 57. On the other hand, even if a radio signal is received by the receiver 2B, the identification information does not correspond, so that the display output unit 57 does not perform display output. The worker can confirm the display output of the display output unit 57 of the receivers 2A and 2B, and can recognize that the watt-hour meters 10A and 10B are correctly wired if they are displayed only by the receiver 2A. . On the other hand, when the display output mode is other than this, it can be recognized that there is a possibility of incorrect wiring in the watt-hour meters 10A and 10B. In addition, the form which can manage and display several identification information by one unit | set may be sufficient even if there are not two or more receivers, such as 2A and 2B.

1, 1A, 1B: Transmitter 2, 2A, 2B: Receiver 10: Electronic watt-hour meter 10A: Electronic watt-hour meter for power supply 10B: Electronic watt-hour meter for surplus power 11: Liquid crystal display 12A, 12B: Measurement unit 13: Electric energy display unit 15: Operation display unit 17: Infrared pulse output unit 20: Electronic watt-hour housing 22: System 23: Consumer load 31: Transmitter housing 32, 32A 32B: Transmitter display output section 33: Mounting section 35: Transmitter power switch 37: Infrared light receiving section 39: Transmitter control section 41: Transmitter power supply 43: Radio signal transmitter 51: Receiver Case 53: Radio signal receiving unit 55: Receiver power switch 57, 57A, 57B: Receiver display output unit 61: Receiver control unit 63: Receiver power source 71: Comprehensive judgment unit

Claims (6)

An inspection system for an electronic watt-hour meter equipped with a transmitter and a receiver,
The transmitter is
An attachment for attaching to the housing of the electronic watt-hour meter;
An infrared receiving unit that receives an infrared signal output from the electronic watt-hour meter at the time of occurrence of a tidal current from the grid toward a consumer load;
A radio signal transmission unit that transmits a radio signal when the infrared light reception unit receives the infrared signal, and the receiver includes:
A radio signal receiving unit for receiving the radio signal;
An inspection system for an electronic watt-hour meter, comprising: a first display output unit that performs a predetermined display output when the wireless signal receiving unit receives the wireless signal. The transmitter transmits the radio signal with identification information attached in advance to the transmitter from the radio signal transmission unit,
In the receiver, the first display output unit performs display output only when the identification information included in the radio signal transmitted from the transmitter is associated in advance in the receiver. The electronic watt-hour meter inspection system according to claim 1, wherein   2. The transmitter according to claim 1, further comprising a second display output unit configured to perform a predetermined display output when the infrared light receiving unit receives an infrared signal output from the electronic watt-hour meter. Inspection system for electronic watt-hour meter as described.   The said 1st display output part or the 2nd display output part is comprised with the light source, The inspection system for electronic watt-hour meters of Claim 3 characterized by the above-mentioned. An inspection method for the electronic watt-hour meter installed in a power consumer in a form in which power is supplied to the customer load from the grid via an electronic watt-hour meter,
Using the electronic watt-hour meter inspection system according to any one of claims 1 to 4,
With the infrared light receiving unit of the transmitter set to a position where the infrared signal output from the electronic watt hour meter can be received, the mounting portion of the transmitter is set to the electronic watt hour meter. A first step of attaching to the housing;
A second step of connecting the customer load to the grid after the first step;
After the second step, a third step of confirming whether or not the predetermined display output is made on the first display output unit of the receiver includes an inspection of an electronic watt-hour meter Method. A power flow from the grid to the customer load occurs in this order through the electronic watt-hour meter for power supply and the electronic watt-hour meter for surplus power, and the generated power in the distributed power source reduces the power consumption in the consumer load. For power receiving customers who can generate a reverse power flow toward the grid through the electronic power meter for surplus power and the electronic power meter for power supply in this order from the distributed power source An inspection method for an electronic watt-hour meter,
The electronic watt-hour meter for supplying power outputs an infrared signal when a power flow from the grid toward the customer load occurs, and the electronic watt-hour meter for surplus power is reversed from the distributed power source toward the grid. An infrared signal is output when a tidal current occurs,
From the attachment part for attaching to the case of the electronic watt-hour meter for power supply or the electronic watt-hour meter for surplus power, and from the electronic watt-hour meter for power supply or the electronic watt-hour meter for surplus power An infrared light receiving unit that receives an output infrared signal; and when the infrared light receiving unit receives an infrared signal output from the electronic watt-hour meter for power supply or the electronic watt-hour meter for surplus power , was a display output unit that performs display output electronic watt meter tester two prepared,
One of said electronic watt meter tester, attached to the housing of the power supply electronic power meters so that the reception is possible in the infrared signal outputted from the power supply electronic power meter and the other of said electronic watt meter tester, the housing of the said as the reception of the infrared signal can be outputted from the surplus power for electronic power meter surplus power electronic power meter A method for inspecting an electronic watt-hour meter, wherein a load is connected to a load side of the electronic watt-hour meter for surplus power in the attached state.

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