JP5128452B2 - Power measuring device - Google Patents

Description

  The present invention relates to a power measuring apparatus configured to be able to simultaneously measure power supplied to at least three measurement objects.

As this type of power measuring apparatus, a power measuring apparatus disclosed by the applicant in Japanese Patent Application Laid-Open No. 2007-132897 is known. This power measuring apparatus includes a voltage detection unit, a current detection unit, a display unit, an operation unit, an arithmetic control unit, and the like. In this power measurement apparatus, the voltage detection unit processes the input electrical signal and outputs voltage data, and the current detection unit processes the input electrical signal and outputs current data. In addition, the calculation control unit determines the voltage value specified by the voltage data output from the voltage detection unit, the current value specified by the current data output from the current detection unit, and the level between the voltage and the current. Based on the phase difference, the power supplied to the measurement object is measured. In this case, in this type of power device developed by the applicant, the voltage detection unit and the current detection unit are arranged in parallel on one substrate body, and are configured by one circuit substrate. Arranged in the housing. Further, in this type of power device, a display unit and an operation unit are arranged on the front panel of the casing, and an input terminal for inputting an electric signal is arranged on the rear panel of the casing.
JP 2007-132897 (page 4-5, FIG. 1)

  However, this type of conventional power measuring apparatus developed by the applicant has the following problems to be solved. That is, in the conventional power measuring apparatus, the voltage detection unit and the current detection unit are arranged in parallel on one substrate body, and are configured by one circuit board. In this case, a multi-channel power measuring device that includes a plurality of circuit boards and measures the power of a plurality of measurement objects (measurement points) (for example, power measurement including four circuit boards 221 as shown in FIG. 9). When configuring the apparatus 201), in order to reduce the size of the entire apparatus, as shown in the figure, the longitudinal direction of each circuit board 221 is perpendicular to the back panel 281 and the front panel 282 of the casing 208. Thus, each circuit board 221 is arranged in the housing. Therefore, in such a multi-channel power measuring apparatus 201, the front panel 282 in the casing 208 is caused by arranging the circuit board 221 in the casing 208 in this way (as shown in the figure). To the rear panel 281 (depth of the casing 208) is relatively long. On the other hand, in order to improve convenience, this type of power measuring device is equipped with a function for displaying a connection diagram indicating a method of connecting a signal line to the input terminal 206 and a description of the connection method on the display unit 204. Yes. In this case, when performing the connection using this function, it is necessary to perform the operation while comparing (comparing) the connection diagram displayed on the display unit 204 with the position of the input terminal 206, etc. It is preferable that the length from the front panel 282 where the section 204 is disposed to the back panel 281 where the input terminal 206 is disposed is short. However, in the conventional power measuring apparatus 201, since the length from the front panel 282 to the back panel 281 in the casing 208 is long as described above, workability when performing the above-described connection work is not good. There are indications, and improvement of this point is desired. On the other hand, a configuration in which each circuit board 221 is arranged in the casing 208 so that the longitudinal direction of each circuit board 221 is parallel to the width direction of the back panel 281 and the front panel 282 is also conceivable. However, even if configured in this manner, the circuit boards 221 need to be separated from each other by a predetermined length, so that when the number of channels is large, the length to the back panel 281 becomes long. Therefore, it is difficult to adopt this configuration.

  This invention is made | formed in view of this subject, and it aims at providing the electric power measuring apparatus which can improve workability | operativity at the time of connecting a signal wire | line.

  In order to achieve the above object, the power measuring apparatus according to claim 1, wherein at least three voltage measuring circuits for inputting an electric signal and measuring a voltage and at least three current measuring circuits for inputting an electric signal and measuring a current are provided. A circuit board in which the voltage measuring circuits and the current measuring circuits are formed on the board body is housed therein, and an input terminal for inputting the electric signal is disposed on the back panel, and a display unit is provided. An electric power provided with a casing disposed on the front panel and configured to be able to measure electric power supplied to at least three measurement objects based on a voltage value and a current value measured by each measurement circuit. In the measuring device, the circuit board is formed by arranging one voltage measuring circuit on the first board body along the longitudinal direction of one horizontally long first board body. A constant circuit board and a single current measurement circuit board formed by arranging the current measurement circuits on the second board body along the longitudinal direction of one horizontally long second board body, The voltage measurement circuit board and the current measurement circuit board are disposed inside the casing in a state where the longitudinal direction and the width direction of the two panels are parallel to each other.

  The power measurement device according to claim 2 is the power measurement device according to claim 1, wherein the voltage measurement circuit board and the current measurement circuit board have the surfaces facing the panels. Is disposed inside.

  The power measurement device according to claim 3 is the power measurement device according to claim 1 or 2, wherein either one of the voltage measurement circuit board and the current measurement circuit board has the surface opposed to the panels. The height of the housing is formed higher than the other of the two measurement circuit boards, and one of the measurement circuit boards is positioned on the front panel side of the other measurement circuit board. Arranged inside.

  2. The power measuring device according to claim 1, wherein one voltage measuring circuit board formed by arranging three or more voltage measuring circuits on the first board body along the longitudinal direction of one horizontally long first board body. And one current measurement circuit board formed by arranging three or more current measurement circuits on the second board body along the longitudinal direction of one horizontally long second board body. The rear panel and the front panel are arranged in the housing in a state where the width direction of the front panel and the front panel is parallel to each other. For this reason, in this power measuring device, the length from the front panel to the rear panel (depth of the casing) in the casing can be formed sufficiently short. For example, the display unit disposed on the front panel It is possible to easily compare (compare) the connection diagram for explaining the method of connecting the signal lines displayed on the screen with the positions of the input terminals provided on the rear panel. Therefore, according to this power measuring apparatus, the workability of the work of connecting the signal line to the input terminal while displaying the above connection diagram on the display unit and referring to the connection diagram can be sufficiently improved.

  According to a second aspect of the present invention, the voltage measurement circuit board and the current measurement circuit board are disposed inside the casing in a state where each surface faces the rear panel and the front panel of the casing. For this reason, in this power measurement device, for example, compared to a configuration in which both measurement circuit boards are arranged inside the casing with each surface facing the bottom and top surfaces of the casing, the front surface of the casing The length from the panel to the back panel (depth of the housing) can be made sufficiently shorter.

  Further, in the power measuring apparatus according to claim 3, one of the measurement circuit boards having a higher height is arranged inside the casing in a state of being positioned closer to the front panel side of the casing than the other measurement circuit board. It is installed. For this reason, for example, a voltage input terminal is disposed on the top surface side of the rear panel of the housing, and a current input terminal is disposed below the position where the voltage input terminal is disposed on the rear panel of the housing. By disposing, there can be no obstacle between the voltage measurement circuit board and the voltage input terminal and between the current measurement circuit board and the current input terminal. As a result, the voltage measurement circuit board and the voltage input terminal, and the current measurement circuit board and the current input terminal can be connected with a short connection line, and the connection work is easily performed. be able to.

  The best mode of a power measuring apparatus according to the present invention will be described below with reference to the accompanying drawings.

  First, the configuration of the power measuring device 1 will be described with reference to the drawings. 1 to 4 is an example of a power measurement device according to the present invention, and as shown in FIG. 1, a plurality of (four examples of at least three examples) voltage measurement. Circuits 2a to 2d (hereinafter also referred to as “voltage measurement circuit 2” when not distinguished from each other) and a plurality of (four at least three examples in the present invention) current measurement circuits 3a to 3d (hereinafter referred to as “current measurement when not distinguished from each other). Circuit 4 ”, display unit 4, operation unit 5, a plurality (four sets in this example) of voltage input terminals 6a, a plurality (four sets in this example) of current input terminals 6b (hereinafter referred to as voltage input terminal 6a). When not distinguished from the current input terminal 6b, it is also referred to as “input terminal 6”), and includes a control unit 7 and a case (housing) 8 (see FIGS. 2 to 4) in which each component is accommodated or disposed. , Multiple (in this example, the present invention Kicking are measurably constituting the power P supplied to the measured object of four) is at least three examples (measurement points).

  Each of the voltage measurement circuits 2a to 2d receives a detection signal Sv (an example of an electrical signal in the present invention) output from a voltage sensor 11 described later, and measures the value of the voltage V. Moreover, each voltage measurement circuit 2a-2d is arranged along the longitudinal direction of the one board | substrate body 31 (1st board | substrate body in this invention) of rectangular shape (horizontally long), as shown in FIG. As a result, a plurality of (four in this example) channel voltage measurement circuit boards 21 for inputting the four detection signals Sv and measuring the value of the voltage V are formed. In this case, as shown in FIGS. 7 and 8, the voltage measurement circuit board 21 has its longitudinal direction (left-right direction in the figure) and the width direction of the back panel 81 and the front panel 82 of the case 8 (left-right direction in the figure). Are parallel to each other, and the surface 21a (the plate surface of the substrate main body 31) is disposed inside the case 8 with the panels 81 and 82 facing each other.

  Each of the current measurement circuits 3a to 3d inputs a detection signal Si (an example of an electric signal in the present invention) output from a current sensor 12 described later, and measures the value of the current I. Each of the current measurement circuits 3a to 3d is arranged along the longitudinal direction of one rectangular (horizontal) substrate body 32 (second substrate body in the present invention), as shown in FIG. As a result, a plurality of (four in this example) channel current measurement circuit boards 22 for inputting the four detection signals Si and measuring the value of the current I are formed. In this case, as shown in FIGS. 7 and 8, the current measurement circuit board 22 has a longitudinal direction (left and right direction in the figure) and a width direction of the back panel 81 and the front panel 82 of the case 8 (left and right direction in the figure). Are parallel to each other, and the surface 22a (the plate surface of the substrate body 32) is disposed inside the case 8 with the panels 81 and 82 facing each other.

  Here, as shown in FIG. 8, in the power measuring apparatus 1, the voltage measuring circuit board 21 (one measurement in the present invention) is performed in a state where the respective surfaces 21 a and 22 a are opposed to both panels 81 and 82. The height of the circuit board is formed to be higher than the height of the current measurement circuit board 22 (the other measurement circuit board in the present invention). Further, in the power measuring apparatus 1, the voltage measuring circuit board 21 is disposed inside the case 8 in a state where the voltage measuring circuit board 21 is positioned on the front panel 82 side of the current measuring circuit board 22.

  The display unit 4 is configured by an LCD, for example, and is disposed on the front panel 82 of the case 8 as shown in FIGS. In this case, the display unit 4 displays the measurement result of the electric power P as shown in FIG. 2 according to the control of the control unit 7, and the method of connecting each signal line to the input terminal 6 as shown in FIG. A connection diagram G to be described is displayed. As shown in FIGS. 2 and 3, the operation unit 5 includes various switches disposed on the front panel 82 of the case 8 and outputs an operation signal corresponding to the operation of the switch.

  The voltage input terminal 6a is a terminal for connecting a signal line of the voltage sensor 11, and is disposed on the top surface side of the back panel 81 of the case 8 as shown in FIG. In addition, the voltage sensor 11 is a clamp type sensor as an example, and detects the value of the voltage V of the electric wire in a state in which the electric wire supplying the electric power P is sandwiched between the measurement object and the detection signal Sv. Is output. The current input terminal 6b is a terminal for connecting a signal line of the current sensor 12, and is disposed below the position where the voltage input terminal 6a is disposed on the rear panel 81 as shown in FIG. . The current sensor 12 is, for example, a clamp-type sensor, and detects a current I flowing in the electric wire in a state in which the electric wire supplying the electric power P is sandwiched between the measurement object and a detection signal. Si is output.

  Here, in the power measuring apparatus 1, both the input terminals 6 a and 6 b are arranged as described above, and the voltage measuring circuit board 21 having a higher height is arranged on the front panel than the current measuring circuit board 22 as described above. It is disposed inside the case 8 in a state of being located on the 82 side. For this reason, in this electric power measurement apparatus 1, as shown in FIG. 8, there is no obstacle between the voltage measurement circuit board 21 and the voltage input terminal 6a and between the current measurement circuit board 22 and the current input terminal 6b. State. As a result, the voltage measurement circuit board 21 and the voltage input terminal 6a and the current measurement circuit board 22 and the current input terminal 6b can be connected with a short connection line, and the connection work is easily performed. be able to.

  In accordance with an operation signal from the operation unit 5, the control unit 7 determines the value of the voltage V measured by each voltage measurement circuit 2, the value of the current I measured by each current measurement circuit 3, and the detection signal Sv and the detection signal Si. Based on the phase difference between the voltage V and the current I specified by the above, the power P supplied to the four measurement objects is measured.

  As described above, the case 8 accommodates the voltage measurement circuit board 21 and the current measurement circuit board 22 therein. In this case, in the power measuring apparatus 1, as described above, one voltage measuring circuit board 21 that is formed horizontally and one current measuring circuit board 22 that is also formed horizontally are The two panels 81 and 82 of the case 8 are arranged inside the case 8 so that the width directions of the panels 81 and 82 are parallel to each other and the respective surfaces 21 a and 22 a face the both panels 81 and 82. For this reason, in the power measuring apparatus 1, the width of the case 8 (the length along the left-right direction in FIGS. 2 to 3) is formed to be relatively long, and the front panel 82 to the rear panel 81 in the case 8 are formed. The length (that is, the depth of the case 8) is sufficiently short.

  Next, a measurement method for measuring the power P supplied to the measurement object via an electric wire (not shown) using the power measurement device 1 will be described with reference to the drawings.

  As described above, the power measuring device 1 has a function of displaying a connection diagram G for explaining a connection method when connecting the signal lines of the voltage sensor 11 and the current sensor 12 to the input terminal 6. When each signal line is connected to the input terminal 6 using this function, the operation unit 5 is operated to instruct the display of the connection diagram G. At this time, the operation unit 5 outputs an operation signal, and the control unit 7 controls the display unit 4 according to the operation signal, whereby the connection diagram G is displayed as shown in FIG.

  Next, while looking at the connection diagram G displayed on the display unit 4, the signal line of the voltage sensor 11 is connected to the voltage input terminal 6a, and the signal line of the current sensor 12 is connected to the current input terminal 6b. Here, in the power measuring apparatus 1, as described above, the length from the front panel 82 to the rear panel 81 (depth of the case 8) in the case 8 is formed sufficiently short. For this reason, it is possible to easily compare (compar) the connection diagram G displayed on the display unit 4 disposed on the front panel 82 with the position of the input terminal 6 disposed on the rear panel 81. It is possible. Therefore, in the power measuring apparatus 1, it is possible to sufficiently improve the workability of the operation of displaying the connection diagram G on the display unit 4 and connecting the signal line to the input terminal 6 with reference to the connection diagram G. It has become.

  Subsequently, the electric wire is sandwiched between the voltage sensor 11 connected to the voltage input terminal 6a via the signal line, and the electric wire is sandwiched between the current sensor 12 connected to the current input terminal 6b via the signal line. Next, the operation unit 5 is operated to instruct the start of measurement. At this time, the voltage measurement circuit 2 inputs the detection signal Sv output from the voltage sensor 11 via the voltage input terminal 6a and measures the value of the voltage V. The current measurement circuit 3 inputs the detection signal Si output from the current sensor 12 via the current input terminal 6b, and measures the value of the current I.

  Subsequently, the control unit 7 determines the value of the voltage V measured by the voltage measurement circuit 2, the value of the current I measured by the current measurement circuit 3, and the voltage V and current specified by the detection signal Sv and the detection signal Si. Based on the phase difference from I, the power P supplied to the measurement object via the electric wire is measured. Next, the control unit 7 controls the display unit 4 to display the measured power P as shown in FIG.

  As described above, in the power measuring apparatus 1, one voltage measuring circuit board 21 formed by arranging four voltage measuring circuits 2 on the board body 31 along the longitudinal direction of one horizontally long board body 31. And one current measurement circuit board 22 formed by arranging four current measurement circuits 3 on the substrate body 32 along the longitudinal direction of one horizontally long substrate body 32, the longitudinal direction and the case 8. The rear panel 81 and the front panel 82 are arranged in the case 8 in a state where the width directions thereof are parallel to each other. For this reason, in this power measuring device 1, the length from the front panel 82 to the back panel 81 (depth of the case 8) in the case 8 can be formed sufficiently short, and as a result, the power measuring device 1 is disposed on the front panel 82. The connection diagram G displayed on the display unit 4 and the position of the input terminal 6 disposed on the back panel 81 can be easily compared (compared). Therefore, according to the power measuring apparatus 1, the workability of the operation of displaying the connection diagram G and connecting the signal line to the input terminal 6 while referring to the connection diagram G can be sufficiently improved.

  Further, in the power measuring apparatus 1, the voltage measuring circuit board 21 and the current measuring circuit board 22 are disposed inside the case 8 with the respective surfaces 21 a and 22 a facing the back panel 81 and the front panel 82. . For this reason, in this power measuring device 1, for example, compared with the configuration in which both measurement circuit boards 21 and 22 are disposed inside the case 8 with the respective surfaces 21a and 22a facing the bottom surface and the top surface, The length of the case 8 from the front panel 82 to the back panel 81 (depth of the case 8) can be made sufficiently shorter.

  Further, in the power measuring device 1, the voltage measuring circuit board 21 having a high height is disposed inside the case 8 in a state of being positioned closer to the front panel 82 of the case 8 than the current measuring circuit board 22. . For this reason, for example, the voltage input terminal 6a is disposed on the top surface side of the back panel 81 of the case 8, and the current input terminal 6b is disposed below the position where the voltage input terminal 6a is disposed on the back panel 81 of the case 8. By disposing, there can be no obstacle between the voltage measurement circuit board 21 and the voltage input terminal 6a and between the current measurement circuit board 22 and the current input terminal 6b. As a result, the voltage measurement circuit board 21 and the voltage input terminal 6a and the current measurement circuit board 22 and the current input terminal 6b can be connected with a short connection line, and the connection work is easily performed. be able to.

  In addition, this invention is not limited to said structure. For example, the example including the four-channel voltage measurement circuit board 21 having the four voltage measurement circuits 2 and the four-channel current measurement circuit board 22 having the four current measurement circuits 3 has been described above. The number of the current measurement circuits 3 is not limited to four, but a voltage measurement circuit board having any number of voltage measurement circuits 2 of 3 or 5 and any number of currents of 3 or 5 or more. A current measurement circuit board having the measurement circuit 3 can be employed. In this case, these voltage measurement circuits 2 are arranged along the longitudinal direction of the substrate body 31 to form a voltage measurement circuit board, and these current measurement circuits 3 are arranged along the longitudinal direction of the substrate body 32. By forming the current measurement circuit board, it is possible to achieve the same effect as that of the power measurement apparatus 1 described above.

  In addition, the example in which the detection signal Sv output from the voltage sensor 11 and the detection signal Si output from the current sensor 12 are input has been described above. However, a voltage (voltage signal) or current (current signal) is obtained by bringing a probe into contact with the wire. ) May be directly input.

1 is a configuration diagram showing a configuration of a power measuring device 1. FIG. 1 is a perspective view of a power measuring device 1. FIG. 1 is a front view of a power measuring device 1. FIG. 2 is a rear view of the power measuring device 1. FIG. 3 is a plan view of a voltage measurement circuit board 21. FIG. 3 is a plan view of a current measurement circuit board 22. FIG. It is a top view of the electric power measurement apparatus 1 seen from the top | upper surface side. 3 is a side view of a current measurement circuit board 22. FIG. It is a top view of the conventional electric power measurement apparatus 201 seen from the top | upper surface side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power measuring device 2a-2d Voltage measuring circuit 3a-3d Current measuring circuit 4 Display part 5 Operation part 6a Voltage input terminal 6b Current input terminal 8 Case 21 Voltage measuring circuit board 21a Surface 22 Current measuring circuit board 22a Surface 31 Substrate body 32 Board body 81 Rear panel 82 Front panel I Current P Power Si Detection signal Sv Detection signal V Voltage

Claims (3)

At least three voltage measuring circuits for inputting an electric signal and measuring a voltage, at least three current measuring circuits for inputting an electric signal and measuring a current, the voltage measuring circuits and the current measuring circuits The circuit board formed above is housed in the housing, the input terminal for inputting the electric signal is disposed on the rear panel, and the display unit is disposed on the front panel. A power measurement device configured to be able to measure power supplied to at least three measurement objects based on a voltage value and a current value measured by a measurement circuit,
The circuit board includes one voltage measuring circuit board formed by arranging the voltage measuring circuits on the first board body along the longitudinal direction of one horizontally long first board body, and one sheet A current measuring circuit board formed by arranging the current measuring circuits on the second board body along the longitudinal direction of the horizontally long second board body,
The power measurement device, wherein the voltage measurement circuit board and the current measurement circuit board are arranged inside the casing in a state where the longitudinal direction and the width direction of the two panels are parallel to each other.   The power measurement device according to claim 1, wherein the voltage measurement circuit board and the current measurement circuit board are disposed inside the casing in a state where each surface faces the panels. Either one of the voltage measurement circuit board and the current measurement circuit board is formed such that a height in a state where the surface is opposed to the both panels is higher than the other of the measurement circuit boards.
The power measurement device according to claim 2, wherein one of the measurement circuit boards is disposed inside the casing in a state of being located closer to the front panel than the other measurement circuit board.

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