WO2021169456A1 - Shunt lead structure, electric power instrument and method for manufacturing shunt lead structure - Google Patents

Shunt lead structure, electric power instrument and method for manufacturing shunt lead structure Download PDF

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Publication number
WO2021169456A1
WO2021169456A1 PCT/CN2020/132749 CN2020132749W WO2021169456A1 WO 2021169456 A1 WO2021169456 A1 WO 2021169456A1 CN 2020132749 W CN2020132749 W CN 2020132749W WO 2021169456 A1 WO2021169456 A1 WO 2021169456A1
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WIPO (PCT)
Prior art keywords
shunt
sampling
pcb
circuit
lead plate
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PCT/CN2020/132749
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French (fr)
Chinese (zh)
Inventor
朱永虎
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浙江永泰隆电子股份有限公司
桐乡市伟达电子有限公司
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Publication of WO2021169456A1 publication Critical patent/WO2021169456A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
    • G01R1/203—Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/146—Measuring arrangements for current not covered by other subgroups of G01R15/14, e.g. using current dividers, shunts, or measuring a voltage drop
    • 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
    • G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
    • G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
    • G01R22/061—Details of electronic electricity meters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R3/00—Apparatus or processes specially adapted for the manufacture or maintenance of measuring instruments, e.g. of probe tips

Definitions

  • the present invention relates to a shunt lead structure used in electric instruments, a power meter and a shunt lead structure manufacturing method thereof, in particular to a shunt lead structure suitable for the field of electric energy transmission, a power meter and a shunt lead structure manufacturing method .
  • the traditional manganese-copper shunt uses a piece of manganese-copper alloy for current sampling, and the wiring is relatively scattered, while the twisted pair of the new-type shunt needs to be glued to a fixed position or fixed with a heat shrinkable tube to make it not easy to loosen, which is not only time-consuming. It is labor intensive and is not conducive to automated production. In 2013, the State Grid Corporation of China revised the corporate standards for electric energy meters.
  • the purpose of the present invention is to provide a shunt lead structure that improves the ability to resist power frequency magnetic field interference, its electric power meter, and a method for manufacturing the shunt lead structure.
  • the present invention adopts the following technical methods:
  • a shunt lead structure including shunt and PCB lead plate
  • the shunt is provided with a resistor body, and the shunt surrounds the resistor body and is sequentially provided with a voltage terminal, a first sampling terminal, and a second sampling terminal along the direction of current flow;
  • the PCB lead plate is at least a double-sided metal hole or multilayer metal hole PCB board, and the PCB lead plate is provided with voltages corresponding to the shunt voltage terminal, the first sampling terminal, and the second sampling terminal. Connection end, first sampling connection end, second sampling connection end;
  • the circuit of the first sampling connection end on the PCB lead board is close to the resistor body of the shunt and extends to the position of the second sampling connection end, and extends with the second sampling connection end circuit through the cross section of the PCB lead board.
  • a first sampling circuit Iin+ and a second sampling circuit Iin- are formed to realize sampling of the shunt.
  • the cross-sectional hole-stranded state of the PCB lead plate includes an upper connecting piece and a lower connecting piece arranged in multiple layers on the PCB lead board, and the upper connecting piece is connected to the lower
  • the upper and lower positions of the sheet body are corresponding and arranged in a cross shape.
  • the cross-sectional hole-stranded state of the PCB lead plate includes an upper connecting piece group and a lower connecting piece group arranged in multiple layers up and down on the PCB lead plate, the upper connecting piece group It includes a plurality of upper connecting sheets arranged at intervals, and the lower connecting sheet group includes a plurality of lower connecting sheets arranged at intervals along the arrangement direction of the upper connecting sheets, and the upper connecting sheets and the lower connecting sheets corresponding to the upper and lower positions are arranged
  • the upper connecting piece body and the lower connecting piece body are both provided with connecting ends, and the connecting end of the adjacent upper connecting piece body is electrically connected to the connecting end of the lower connecting piece body.
  • the PCB lead plate is provided with electrical connection posts extending up and down, and the upper and lower connection plates adjacent to each other in the front-to-back arrangement direction are electrically connected to each other through the electrical connection posts.
  • the first sampling circuit Iin+ and the second sampling circuit Iin- are formed.
  • an upper connecting sheet body group and a lower connecting sheet body group arranged in two upper and lower layers are provided on the PCB lead board.
  • the current is converted into a corresponding voltage signal after passing through the shunt, and the sampled voltage signal enters the AD metering chip after passing through the first-order RC filter circuit, and the current is calculated through conversion to realize current measurement.
  • the first sampling terminal and the second sampling terminal are respectively arranged on the shunt resistor or on the side of the shunt resistor.
  • the PCB lead plate is close to the surface parallel to the shunt
  • the PCB lead plate is close to and perpendicular to the shunt.
  • the length of the circuit of the first sampling connection terminal on the PCB lead board extending to the second sampling connection terminal is the same as the length of the resistor body between the first sampling terminal and the second sampling terminal on the shunt.
  • the back of the extension circuit of the first sampling connection end on the PCB lead board is insulated and tightly attached to the shunt.
  • the flow divider is a manganin flow divider.
  • An electric power meter includes a power meter housing.
  • the power meter housing is provided with a sampling device, a metering device that transforms and calculates the signal measured by the sampling device, and a metering display device that displays the metering result to a user.
  • the sampling device It includes a terminal button box, the terminal button box includes a terminal button box, a connection terminal button installed on the terminal button box, the connection terminal button is used to connect to the external power input and output line, and the connection terminal button is connected to the above-mentioned
  • the shunt lead structure is connected.
  • a method for manufacturing a shunt lead structure includes a PCB lead plate to be attached to the shunt.
  • the PCB lead plate is provided with a voltage connection circuit corresponding to the shunt, a first sampling circuit, and a first sampling circuit. Two sampling circuits, the first sampling circuit and the second sampling circuit are used to electrically connect the two sampling terminals of the shunt, and the manufacturing method of the PCB lead plate includes:
  • a first upper connecting sheet and a second upper connecting sheet are arranged on the first layer, and a first lower connecting sheet and a second lower connecting sheet are arranged on the second layer.
  • the first upper connecting piece body and the first lower connecting piece body are opposite to each other on the bottom plate but the direction is at a crossing angle, and the second upper connecting piece body and the second lower connecting piece body are respectively on the bottom plate
  • the upper and lower positions are opposite but the direction is at a crossing angle
  • the bottom plate is provided with a first through hole and a second through hole penetrating the first layer and the second layer, and the second through hole is located beside the first through hole;
  • the second Metal is injected or implanted into the through hole to electrically connect the first lower connecting piece body and the second upper connecting piece body to form a second sampling circuit.
  • a voltage connection terminal perforation is drilled on the voltage connection circuit of the PCB lead plate to be electrically plugged into the voltage terminal of the shunt.
  • a first sampling connection end hole is drilled on the first sampling circuit of the PCB lead plate for electrical plugging into the first sampling end of the shunt.
  • a second sampling connection end hole is pierced on the second sampling circuit of the PCB lead plate to be electrically plugged into the second sampling end of the shunt.
  • the first sampling circuit path of the PCB lead board is near the second sampling connection end perforation.
  • the PCB lead plate is attached to the shunt, and the shunt includes a manganin resistor, and the first sampling connection end perforation and the second sampling connection end perforation span the manganese copper resistor Both ends.
  • the PCB lead plate is attached horizontally or vertically on the shunt.
  • the PCB lead plate of the present invention is at least a double-sided metal holed or multilayer metal holed PCB board, and the PCB lead plate is provided with a voltage connection terminal and a second circuit corresponding to the shunt.
  • a sampling connection end and a second sampling connection end; the circuit of the first sampling connection end on the PCB lead board is close to the resistor body of the shunt and extends to the second sampling connection end position, and is connected to the second sampling connection end circuit
  • the stranded state extends to the other end of the PCB lead plate, forming a first sampling circuit Iin+ and a second sampling circuit Iin- for sampling the shunt.
  • the hole-stranded circuit can effectively suppress electromagnetic interference like a twisted pair.
  • This is not only the small loop area between the two circuits in the hole-stranded state, but also the phase of the hole-stranded circuit.
  • the currents induced on the two adjacent circuits have opposite directions, so they can cancel each other.
  • the PCB board is used as the connecting wire of the shunt to fix the reclamation area, which solves the uncertain factors of the reclamation area due to the wire connection, and solves the loose twisted-pair wire. Uncertain factors effectively reduce the induced current generated by the external alternating magnetic field interference, with strong anti-interference ability and high reliability.
  • FIG. 1 is a schematic structural diagram of a shunt with a shunt lead structure according to a first embodiment of the present invention
  • FIG. 2 is a schematic diagram of the structure of the shunt lead structure in the first embodiment of the present invention.
  • FIG 3 is a schematic diagram of the structure of the PCB lead plate of the shunt lead structure according to the first embodiment of the present invention.
  • FIG. 4 is a schematic diagram of the structure of the PCB lead plate of the shunt lead structure after removing the insulating layer in the first embodiment of the present invention.
  • Fig. 5 is a schematic diagram of a shunt with a shunt lead structure according to a second embodiment of the present invention.
  • Fig. 6 is a schematic structural diagram of a shunt lead structure according to a second embodiment of the present invention.
  • FIG. 7 is a schematic diagram of the structure of the PCB lead plate of the shunt lead structure according to the second embodiment of the present invention.
  • FIG. 8 is a schematic diagram of the structure of the PCB lead plate of the shunt lead structure after removing the insulating layer in the second embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of the use environment of the shunt lead structure in the first embodiment of the present invention.
  • Fig. 10 is a schematic structural diagram of the use environment of the shunt lead structure in the second embodiment of the present invention.
  • FIG. 11 is a schematic diagram of the structure in FIG. 10 from another angle.
  • Terminal button box 100 100' Terminal button box 101
  • Connection terminal button 102 shunt lead structure 1
  • the first sampling port 22, 22' The second sampling port 23, 23'
  • the first sampling connection terminal 32, 32' The first sampling circuit 321
  • the second upper connection sheet 3014 The second layer 302
  • the first lower connecting piece 3023 The second lower connecting piece 3024
  • FIGS. 1 to 11 are schematic structural diagrams of the shunt lead structure 1 of the present invention.
  • the shunt lead structure 1 of the present invention includes a shunt 2 and a PCB lead plate 3.
  • the shunt 2 is provided with a resistor 20, and the shunt 2 surrounds the resistor 20 with at least one voltage terminal 21 and two Sampling terminals 22, 23, the shunt 2 is provided with the voltage terminal 21, the first sampling terminal 22, and the second sampling terminal 23 in sequence along the direction of the current flow;
  • the PCB lead plate 3 is at least double-sided with metal holes Or a multi-layer metal hole PCB board, the PCB lead board 3 is provided with a voltage connection terminal 31 and a first sampling terminal respectively corresponding to the voltage terminal 21, the first sampling terminal 22, and the second sampling terminal 23 of the shunt 2
  • the connection end 32, the second sampling connection end 33; the circuit of the first sampling connection end 32 on the PCB lead board 3 is close to (such as parallel along, parallel along does not mean that it must extend in a
  • the circuit of the first sampling connection terminal 32 on the PCB lead board 3 is close to the resistor body 20 of the corresponding shunt 2 and extends to the position of the second sampling connection terminal 33; the circuit with the second sampling connection terminal 33 passes through the PCB board
  • the cross-sectional hole-stranded state extends to the other end of the PCB lead plate 3 to form a first sampling circuit Iin+321 and a second sampling circuit Iin-331, which are used for sampling by the shunt 2 and are further electrically connected to the main circuit board (not shown) ).
  • the length of the circuit of the first sampling connection terminal 32 extending to the second sampling connection terminal 33 is approximately the same as the length of the resistor body 20 between the first sampling terminal 22 and the second sampling terminal 23 of the shunt 2.
  • Faraday's law when the magnetic flux passing through a certain unclosed coil changes, although there is no induced current in the coil, the induced electromotive force still exists.
  • the magnitude of the induced electromotive force E is only the angle ⁇ between the magnetic induction intensity B, the conductor length L, the cutting speed v and v and the B direction.
  • E BLvsin ⁇ ( ⁇ is the angle between B, L, and v by converting each other to be perpendicular to each other).
  • the conductor length L determines the magnitude of the induced electromotive force; if there is a current in the closed circuit, there must be a power supply in this circuit, because the current is caused by the electromotive force of the power supply.
  • the electromagnetic induction phenomenon since the circuit is closed If there is an induced current, there must be an electromotive force in this circuit.
  • the other end of the sampling circuit of the PCB lead board 3 is electrically connected to the main circuit board load to form an entire closed loop; when the external alternating magnetic field interferes, the entire closed loop generates an induced current; it can be seen that the first on the PCB lead board 3
  • the second sampling circuit Iin-331 of the second sampling circuit Iin-331 extends to the other end of the PCB lead plate 3 through the cross-section of the PCB lead plate 3 in a perforated and twisted state, and the two sampling circuits 321 and 331 have the same extended length in the twisted state; that is, the first sampling circuit Iin
  • the total length of +321 is approximately the same as the total length of the sum of the length of the corresponding resistor 20 and the second sampling circuit Iin-331.
  • the invention uses the PCB board as the connecting wire of the shunt 2 to fix the reclamation area, solves the uncertain factors of the reclamation area due to the wire connection, and at the same time solves the uncertain factors of the loose twisted pair, and effectively reduces the interference from the external alternating magnetic field. And an induced current is generated.
  • the cross-sectional hole-stranded state of the PCB lead plate 3 includes: an upper connection piece group 3011 and a lower connection piece group 3021 arranged in two upper and lower layers are provided on the PCB lead plate 3, the upper connection piece group 3011 includes a plurality of inclined upper connecting pieces arranged at intervals in front and rear, and the lower connecting piece group 3021 includes a plurality of lower connecting pieces arranged at intervals along the arrangement direction of the upper connecting pieces.
  • the connecting pieces are in a cross shape. Both ends of the upper connecting piece and the lower connecting piece are provided with connecting ends 3012 and 3022.
  • the PCB lead plate 3 is provided with electrical connecting posts 4 extending up and down.
  • the adjacent upper connecting piece body and the lower connecting piece body are electrically connected to each other through the electrical connecting column 4 to form the first sampling circuit Iin+321 and the second sampling circuit Iin-331, respectively.
  • the "front and rear” can be any arrangement direction of the upper connecting piece group 3011 and the lower connecting piece group 3021 on the PCB lead board 3, and the upper connecting piece group 3011 and the lower connecting piece group 3021 are arranged in a straight line or The non-linear arrangement is within the protection scope of the present invention.
  • the first sampling circuit Iin+321 and the second sampling circuit Iin-331 can form a relatively stable cross-sectional hole-stranded state, and a circuit in the hole-stranded state Like twisted pair, it can effectively suppress electromagnetic interference.
  • the PCB board can be used as the connection line of the shunt 2 to fix the reclamation area, solve the uncertain factors of the loose twisted pair, and have strong anti-interference ability and high reliability.
  • the electrical connection column 4 can be Hollow or solid, etc.
  • the PCB lead plate 3 is also provided with a voltage connection circuit 55 beside the first sampling circuit Ii, n+321 and the second sampling circuit Iin-331, and the voltage connection circuit 55 is connected to the voltage terminal of the shunt 2 twenty one.
  • the current is converted into a corresponding voltage signal after passing through the shunt 2, and the sampled voltage signal enters the AD metering chip after passing through the first-order RC filter circuit, and the current is calculated through conversion to realize current measurement.
  • the shunt lead structure 1 can detect the voltage on the shunt 2 so that the current can be calculated by the metering conversion device.
  • the first sampling terminal 22 and the second sampling terminal 23 are respectively arranged on the resistor body 20 of the shunt 2 or on the side of the resistor body 20 of the shunt 2. That is, the first sampling terminal 22 can be arranged on or on the side of the resistor body 20 of the shunt 2 and the second sampling terminal 23 can be arranged on or on the side of the resistor body 20 of the shunt 2. Sampling of side voltage.
  • the PCB lead plate 3 is close to and parallel to the surface of the shunt 2 or the PCB lead plate 3 is close to and perpendicular to the shunt 2.
  • Figures 1 to 4 and Figure 9 are the structural schematic diagram of the shunt lead structure 1 and the structural schematic diagram of the terminal button box 100 according to the first embodiment of the present invention.
  • the PCB lead plate 3 It is closely parallel to the surface of the shunt 2 and in the embodiment shown in FIGS. 1 to 2, the current flows through the shunt 2 from left to right.
  • Figures 5 to 8 and Figures 10 to 11 are a schematic structural diagram of the shunt lead structure 1 and a schematic structural diagram of the terminal button box 100 according to the second embodiment of the present invention.
  • the PCB The lead plate 3' is closely attached to the shunt 2'perpendicularly to the shunt 2'.
  • the difference between the second embodiment and the first embodiment is that the voltage terminal 21' and the shunt 2'are installed on the terminal button box 100'
  • the positions of the first sampling end 22', the second sampling end 23', and the voltage connection end 31', the first sampling connection end 32', and the second sampling connection end 33' on the PCB lead board 3' are different from each other.
  • the PCB lead plate 3' is perpendicular to the resistor body 20'.
  • the current flows through the shunt 2 from right to left. In this way, the reclamation area can be reduced, and the induced current generated by the interference of the external alternating magnetic field can be further reduced.
  • the present invention is not limited to both the first embodiment and the second embodiment. In different embodiments of the present invention, the current flow direction can be changed in other directions, and the relative positions of the voltage terminal, the first sampling terminal, and the second sampling terminal can be adjusted, but it is still within the protection scope of the present invention.
  • the length of the circuit extending from the first sampling connection terminal 32 on the PCB lead board 3 to the second sampling connection terminal 33 is the same as the length of the resistor body 20 between the first sampling terminal 22 and the second sampling terminal 23 on the shunt 2.
  • the same length means substantially the same.
  • Faraday's law when a part of the conductor of a closed loop cuts the magnetic field of force in a magnetic field, the magnetic flux in the closed loop must change, and an induced electromotive force is generated in the closed loop, thereby generating an induced current. It can be seen that the shunt structure in the prior art does not solve the problem of the induced electromotive force generated by the resistor 20 between the two sampling ends of the shunt 2 when the external alternating magnetic field interferes.
  • the PCB lead plate 3 of the present invention After the extension circuit of the first sampling connection terminal 32 reaches the position of the second sampling connection terminal 33, the length of the resistor body 20 between the first sampling terminal 22 and the second sampling terminal 23 of the corresponding shunt 2 is approximately the same, which solves the problem of 20 induced electromotive force.
  • the back side of the extension circuit of the first sampling connection terminal 32 on the PCB lead plate 3 is insulated and tightly attached to the shunt 2. In this way, the PCB lead plate 3 is closely attached to the shunt 2, which can further reduce the reclamation area, better reduce the induced current caused by the external alternating magnetic field interference, and avoid the PCB lead plate 3 and the shunt 2 A short circuit occurred.
  • the flow divider 2 of the present invention may be a manganin flow divider.
  • the combination of the manganese-copper shunt and the PCB lead plate 3 of the present invention can enable the shunt lead structure 1 of the present invention to have higher sampling accuracy, less temperature influence, and low cost.
  • the present invention can be used to manufacture a power meter, including a power meter housing, in which a sampling device, a metering device for transforming and calculating the signal measured by the sampling device, and a metering display device for displaying the metering results to the user are provided in the power meter housing ,
  • the sampling device includes a terminal button box 100, the terminal button box 100 includes a terminal button box 101, a connection terminal button 102 installed on the terminal button box 101, the connection terminal button 102 is used to input power The output line is connected, and the connection terminal button 102 is connected with the aforementioned shunt lead structure 1.
  • the power meter has high accuracy, low temperature influence, and low cost when detecting the user's power consumption.
  • the present invention provides a method for manufacturing a shunt lead structure 1, which includes a PCB lead plate 3 mounted on the shunt 2, and the PCB lead plate 3 is provided with a voltage corresponding to the shunt 2
  • the connection circuit 5, the first sampling circuit Iin+321 and the second sampling circuit Iin-331, the first sampling circuit Iin+321 and the second sampling circuit Iin-331 are used to electrically connect the two sampling terminals of the shunt 2 .
  • the manufacturing method of the PCB lead plate 3 includes:
  • the bottom plate is provided with a first layer 301 and a second layer 302 that are electrically isolated from each other from above and below;
  • the first layer 301 is provided with a first upper connecting sheet 3013 and a second upper connecting sheet 3014 arranged in front and rear
  • the second layer 302 is provided with a first lower connecting sheet 3023 and a second connecting sheet 3023 arranged in front and rear.
  • the bottom plate is provided with a first through hole and a second through hole penetrating through the first layer 301 and the second layer 302, and the second through hole is located beside the first through hole;
  • a first electrical connection post 4 is provided in the first through hole, and the first electrical connection post 4 is electrically connected to the first upper connection piece 3013 and the second lower connection piece 3024 for The first sampling circuit Iin+321 is formed;
  • a second electrical connection post 4 is provided in the second through hole, and the second electrical connection post 4 is electrically connected to the first lower connection piece 3023 and the The second upper connecting piece 3014 is used to form a second sampling circuit Iin-331;
  • the first upper connecting piece 3013 and the first lower connecting piece 3023 are opposite to each other on the bottom plate but running at a crossing angle.
  • the second upper connecting piece 3014 and the second lower connecting piece 3024 are respectively The upper and lower positions on the bottom plate are opposite but the direction is at a crossing angle.
  • the PCB lead plate 3 can be effectively manufactured.
  • a power meter for users to detect power consumption can be manufactured.
  • the power meter can effectively reduce The alternating magnetic field interferes with the induced current, which has strong adaptability to the external environment, high accuracy, low temperature influence and low cost.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

A shunt lead structure (1), an electric power instrument and a method for manufacturing the shunt lead structure (1). The shunt lead structure (1) comprises a shunt (2, 2') and a PCB lead plate (3, 3'); the shunt (2, 2') is provided with a voltage end (21, 21'), a first sampling end (22, 22') and a second sampling end (23, 23') in sequence around a resistor body (20, 20') along a current flow direction; the PCB lead plate (3, 3') is at least a PCB board with double-sided metal holes or multiple layers of metal holes, and the PCB lead plate (3, 3') is provided with a voltage connecting end (31, 31'), a first sampling connecting end (32, 32') and a second sampling connecting end (33, 33') which correspond to the shunt (2, 2'); a circuit of the first sampling connecting end (32, 32') on the PCB lead plate (3, 3') extends to the position of the second sampling connecting end (33, 33') in parallel along the resistor body (20, 20') of the shunt (2, 2'), and extends, together with a circuit of the second sampling connecting end (33, 33'), to the other end of the PCB lead plate (3, 3') via a section-hole twisting state of the PCB lead plate (3, 3'), so that a first sampling circuit lin+ (321) and a second sampling circuit Iin- (331) are formed to sample the shunt (2, 2'), respectively. In this way, induction current generated by external magnetic interference is reduced, and the detection accuracy is improved.

Description

分流器引线结构、其电力仪表及分流器引线结构制造方法Shunt lead structure, its electric power meter and shunt lead structure manufacturing method 技术领域Technical field
本发明涉及一种用于电力仪器中的分流器引线结构、其电力仪表及分流器引线结构制造方法，尤其是适用于电能传输领域的分流器引线结构、其电力仪表及分流器引线结构制造方法。The present invention relates to a shunt lead structure used in electric instruments, a power meter and a shunt lead structure manufacturing method thereof, in particular to a shunt lead structure suitable for the field of electric energy transmission, a power meter and a shunt lead structure manufacturing method .
背景技术Background technique
目前分流器计量准确度较高、温度影响较小、成本低的优点被广泛用于单相智能电能表中，尤其是锰铜分流器；由于分流器的安装位置以及连接取样导线的特点，导致锰铜分流器在受到工频磁场干扰时会产生感应电流，这会严重影响计量电流的准确度。At present, the advantages of high measurement accuracy, low temperature influence, and low cost of shunts are widely used in single-phase smart electric energy meters, especially manganin shunts; due to the installation position of the shunts and the characteristics of connecting sampling wires, The manganese-bronze shunt will generate induced current when it is interfered by the power frequency magnetic field, which will seriously affect the accuracy of the current measurement.
传统锰铜分流器就是通过一片锰铜合金进行电流取样，走线较分散，而新型分流器的双绞线需要进行点胶固定位置或用热缩管固定形状使之不易松散，这不仅耗时耗力，还不利于自动化生产。在2013年国家电网公司对电能表的企业标准作出了修订，在Q/GDW 1364-2013《单相智能电能表技术规范》影响量试验中新增加了“电能表电压线路通以115％Un，电流回路无电流，将0.5mT工频磁场施加在电能表受磁场影响最敏感处，在20倍的理论起动时间内，电能表不应产生多于1个的脉冲输出”。这一标准的提出，促使了电能表行业积极寻求提高电能表的抗电磁干扰能力的方案。The traditional manganese-copper shunt uses a piece of manganese-copper alloy for current sampling, and the wiring is relatively scattered, while the twisted pair of the new-type shunt needs to be glued to a fixed position or fixed with a heat shrinkable tube to make it not easy to loosen, which is not only time-consuming. It is labor intensive and is not conducive to automated production. In 2013, the State Grid Corporation of China revised the corporate standards for electric energy meters. In the Q/GDW 1364-2013 "Technical Specifications for Single-phase Smart Energy Meters", the influence quantity test added "The voltage line of the electric energy meter is 115% Un, There is no current in the current loop, and a 0.5mT power frequency magnetic field is applied to the electric energy meter where it is most sensitive to the influence of the magnetic field. The electric energy meter should not generate more than one pulse output within 20 times the theoretical starting time." The proposal of this standard has prompted the electric energy meter industry to actively seek solutions to improve the anti-electromagnetic interference capability of electric energy meters.
因此，有必要通过对分流器引线结构及其电力仪表进行优化改进，以提高分流器抗工频磁场干扰的能力。Therefore, it is necessary to optimize and improve the shunt lead structure and its power meter to improve the shunt's ability to resist power frequency magnetic field interference.
发明内容Summary of the invention
本发明的目的在于提供一种提高抗工频磁场干扰能力的分流器引线结构、其电力仪表及分流器引线结构制造方法。The purpose of the present invention is to provide a shunt lead structure that improves the ability to resist power frequency magnetic field interference, its electric power meter, and a method for manufacturing the shunt lead structure.
为实现上述技术目的，本发明采用如下技术方式：In order to achieve the above technical objectives, the present invention adopts the following technical methods:
一种分流器引线结构，包括分流器和PCB引线板，A shunt lead structure, including shunt and PCB lead plate,
所述分流器设有电阻体，所述分流器围绕所述电阻体并沿电流的流向方向顺序设置有电压端、第一取样端、第二取样端；The shunt is provided with a resistor body, and the shunt surrounds the resistor body and is sequentially provided with a voltage terminal, a first sampling terminal, and a second sampling terminal along the direction of current flow;
所述的PCB引线板至少是双面金属孔化或多层金属孔化的PCB板，所述PCB引线板上设有与分流器电压端、第一取样端、第二取样端相对应的电压连接端、第一取样连接端、第二取样连接端；The PCB lead plate is at least a double-sided metal hole or multilayer metal hole PCB board, and the PCB lead plate is provided with voltages corresponding to the shunt voltage terminal, the first sampling terminal, and the second sampling terminal. Connection end, first sampling connection end, second sampling connection end;
所述的PCB引线板上的第一取样连接端的电路贴近所述分流器的电阻体延伸至第二取样连接端位置，并与第二取样连接端电路通过PCB引线板截面孔化绞合状态延伸至PCB引线板另一端，形成第一取样电路Iin+和第二取样电路Iin-用以实现对分流器采样。The circuit of the first sampling connection end on the PCB lead board is close to the resistor body of the shunt and extends to the position of the second sampling connection end, and extends with the second sampling connection end circuit through the cross section of the PCB lead board. To the other end of the PCB lead plate, a first sampling circuit Iin+ and a second sampling circuit Iin- are formed to realize sampling of the shunt.
作为本发明的进一步改进，PCB引线板截面孔化绞合状态包括，在PCB引线板上设有呈上下多层设置的上连接片体和下连接片体，所述上连接片体与下连接片体上下位置相应且呈相互交叉状设置。As a further improvement of the present invention, the cross-sectional hole-stranded state of the PCB lead plate includes an upper connecting piece and a lower connecting piece arranged in multiple layers on the PCB lead board, and the upper connecting piece is connected to the lower The upper and lower positions of the sheet body are corresponding and arranged in a cross shape.
作为本发明的进一步改进，PCB引线板截面孔化绞合状态包括，在PCB引线板上设有呈上下多层设置的上连接片体组和下连接片体组，所述上连接片体组包括若干前后间隔排列的上连接片体，下连接片体组包括若干沿着上连接片体排列方向间隔排列的下连接片体，上下位置相应的所述上连接片体与下连接片体呈相互交叉状设置，所述上连接片体与下连接片体均设有连接端，相贴近的所述上连接片体的连接端与下连接片体的连接端相电性连接。As a further improvement of the present invention, the cross-sectional hole-stranded state of the PCB lead plate includes an upper connecting piece group and a lower connecting piece group arranged in multiple layers up and down on the PCB lead plate, the upper connecting piece group It includes a plurality of upper connecting sheets arranged at intervals, and the lower connecting sheet group includes a plurality of lower connecting sheets arranged at intervals along the arrangement direction of the upper connecting sheets, and the upper connecting sheets and the lower connecting sheets corresponding to the upper and lower positions are arranged The upper connecting piece body and the lower connecting piece body are both provided with connecting ends, and the connecting end of the adjacent upper connecting piece body is electrically connected to the connecting end of the lower connecting piece body.
作为本发明的进一步改进，所述PCB引线板上设有上下延伸的电性连接柱，沿前后排列方向相邻的上连接片体与下连接片体通过电性连接柱相互电性连接从而分别形成所述第一取样电路Iin+和第二取样电路Iin-。As a further improvement of the present invention, the PCB lead plate is provided with electrical connection posts extending up and down, and the upper and lower connection plates adjacent to each other in the front-to-back arrangement direction are electrically connected to each other through the electrical connection posts. The first sampling circuit Iin+ and the second sampling circuit Iin- are formed.
作为本发明的进一步改进，所述PCB引线板上先在上下相对的连接端上进行截面孔化形成穿孔，后在所述穿孔内进行金属注入或植入，形成所述电性连接柱。As a further improvement of the present invention, on the PCB lead plate, firstly, cross-sectional holes are formed on the upper and lower connection ends to form perforations, and then metal injection or implantation is performed in the perforations to form the electrical connection posts.
作为本发明的进一步改进，在PCB引线板上设有呈上下两层设置的上连接 片体组和下连接片体组。As a further improvement of the present invention, an upper connecting sheet body group and a lower connecting sheet body group arranged in two upper and lower layers are provided on the PCB lead board.
作为本发明的进一步改进，电流经过所述分流器后转换为对应的电压信号，取样的电压信号经过一阶RC滤波电路后进入AD计量芯片中，并经过转化计算出电流，实现电流的计量。As a further improvement of the present invention, the current is converted into a corresponding voltage signal after passing through the shunt, and the sampled voltage signal enters the AD metering chip after passing through the first-order RC filter circuit, and the current is calculated through conversion to realize current measurement.
作为本发明的进一步改进，所述的第一取样端和第二取样端分别设置于分流器电阻体上或分流器电阻体侧方。As a further improvement of the present invention, the first sampling terminal and the second sampling terminal are respectively arranged on the shunt resistor or on the side of the shunt resistor.
作为本发明的进一步改进，所述的PCB引线板紧贴平行于所述分流器表面上As a further improvement of the present invention, the PCB lead plate is close to the surface parallel to the shunt
作为本发明的进一步改进，所述的PCB引线板紧贴垂直于所述分流器上。As a further improvement of the present invention, the PCB lead plate is close to and perpendicular to the shunt.
作为本发明的进一步改进，PCB引线板上第一取样连接端的电路延伸至第二取样连接端的长度与分流器上第一取样端和第二取样端之间的电阻体长度相同。As a further improvement of the present invention, the length of the circuit of the first sampling connection terminal on the PCB lead board extending to the second sampling connection terminal is the same as the length of the resistor body between the first sampling terminal and the second sampling terminal on the shunt.
作为本发明的进一步改进，PCB引线板上第一取样连接端延伸电路的背面与分流器绝缘紧贴。As a further improvement of the present invention, the back of the extension circuit of the first sampling connection end on the PCB lead board is insulated and tightly attached to the shunt.
作为本发明的进一步改进，所述分流器为锰铜分流器。As a further improvement of the present invention, the flow divider is a manganin flow divider.
本发明还可采用如下技术方案：The present invention can also adopt the following technical solutions:
一种电力仪表，包括电力仪表外壳，所述电力仪表外壳内设有取样装置、对取样装置测得的信号进行转化运算的计量装置、将计量结果向用户显示的计量显示装置，所述取样装置包括接线端钮盒，所述接线端钮盒包括端钮盒，安装于端钮盒上的连接端钮，所述连接端钮用以与外界电力输入输出线路连接，所述连接端钮与上述分流器引线结构相连接。An electric power meter includes a power meter housing. The power meter housing is provided with a sampling device, a metering device that transforms and calculates the signal measured by the sampling device, and a metering display device that displays the metering result to a user. The sampling device It includes a terminal button box, the terminal button box includes a terminal button box, a connection terminal button installed on the terminal button box, the connection terminal button is used to connect to the external power input and output line, and the connection terminal button is connected to the above-mentioned The shunt lead structure is connected.
本发明还可采用如下技术方案：The present invention can also adopt the following technical solutions:
一种分流器引线结构的制造方法，包括用以贴置于分流器上的PCB引线板，所述PCB引线板设有用以与所述分流器相对应的电压连接电路、第一取样电路与第二取样电路，所述第一取样电路与第二取样电路用以电性连接分流器的两个取样端，所述PCB引线板制造方法包括：A method for manufacturing a shunt lead structure includes a PCB lead plate to be attached to the shunt. The PCB lead plate is provided with a voltage connection circuit corresponding to the shunt, a first sampling circuit, and a first sampling circuit. Two sampling circuits, the first sampling circuit and the second sampling circuit are used to electrically connect the two sampling terminals of the shunt, and the manufacturing method of the PCB lead plate includes:
制备PCB底板，所述底板设置上下相互电力隔绝的第一层与第二层；Preparing a PCB bottom plate, wherein the bottom plate is provided with a first layer and a second layer that are electrically isolated from each other from above and below;
所述第一层上设置前后排布的第一上连接片体、第二上连接片体，所述第二层上设置前后排布的第一下连接片体、第二下连接片体，所述第一上连接片体与第一下连接片体在所述底板上上下位置相对但走向呈一交叉角度，所述第二上连接片体与第二下连接片体分别在所述底板上上下位置相对但走向呈一交叉角度；A first upper connecting sheet and a second upper connecting sheet are arranged on the first layer, and a first lower connecting sheet and a second lower connecting sheet are arranged on the second layer. The first upper connecting piece body and the first lower connecting piece body are opposite to each other on the bottom plate but the direction is at a crossing angle, and the second upper connecting piece body and the second lower connecting piece body are respectively on the bottom plate The upper and lower positions are opposite but the direction is at a crossing angle;
所述底板上设置贯穿第一层与第二层的第一穿孔和第二穿孔，所述第二穿孔位于第一穿孔旁侧；The bottom plate is provided with a first through hole and a second through hole penetrating the first layer and the second layer, and the second through hole is located beside the first through hole;
在所述第一穿孔内注入或植入金属，使所述第一上连接片体与所述第二下连接片体相互电性连接，用以形成所述第一取样电路；所述第二穿孔内注入或植入金属，使所述第一下连接片体与所述第二上连接片体电性连接，用以形成第二取样电路。Metal is injected or implanted into the first through hole to electrically connect the first upper connecting piece body and the second lower connecting piece body to form the first sampling circuit; the second Metal is injected or implanted into the through hole to electrically connect the first lower connecting piece body and the second upper connecting piece body to form a second sampling circuit.
作为本发明的进一步改进，在所述PCB引线板的电压连接电路上穿设电压连接端穿孔，用以电性插接于分流器的电压端。As a further improvement of the present invention, a voltage connection terminal perforation is drilled on the voltage connection circuit of the PCB lead plate to be electrically plugged into the voltage terminal of the shunt.
作为本发明的进一步改进，在所述PCB引线板的第一取样电路上穿设第一取样连接端穿孔，用以电性插接于分流器的第一取样端。As a further improvement of the present invention, a first sampling connection end hole is drilled on the first sampling circuit of the PCB lead plate for electrical plugging into the first sampling end of the shunt.
作为本发明的进一步改进，在所述PCB引线板的第二取样电路上穿设第二取样连接端穿孔，用以电性插接于分流器的第二取样端。As a further improvement of the present invention, a second sampling connection end hole is pierced on the second sampling circuit of the PCB lead plate to be electrically plugged into the second sampling end of the shunt.
作为本发明的进一步改进，在所述PCB引线板的第一取样电路途径第二取样连接端穿孔附近。As a further improvement of the present invention, the first sampling circuit path of the PCB lead board is near the second sampling connection end perforation.
作为本发明的进一步改进，所述PCB引线板贴合于分流器上，所述分流器包括锰铜电阻体，所述第一取样连接端穿孔与第二取样连接端穿孔跨于锰铜电阻体两端。As a further improvement of the present invention, the PCB lead plate is attached to the shunt, and the shunt includes a manganin resistor, and the first sampling connection end perforation and the second sampling connection end perforation span the manganese copper resistor Both ends.
作为本发明的进一步改进，所述PCB引线板水平贴置或垂直贴置于分流器上。As a further improvement of the present invention, the PCB lead plate is attached horizontally or vertically on the shunt.
较于现有技术，本发明所述的PCB引线板至少是双面金属孔化或多层金属孔化的PCB板，所述PCB引线板上设有与分流器相对应的电压连接端、第一取样连接端、第二取样连接端；所述的PCB引线板上的第一取样连接端的电路贴 近所述分流器的电阻体延伸至第二取样连接端位置，并与第二取样连接端电路通过PCB引线板截面孔化绞合状态延伸至PCB引线板另一端，形成第一取样电路Iin+和第二取样电路Iin-用以实现对分流器采样。如此设置，孔化绞合状态的电路像双绞线一样能够有效地抑制电磁干扰，这不仅是孔化绞合状态的两电路之间具有很小的回路面积，而且孔化绞合电路上相邻两回路上感应出的电流具有相反的方向，因此可以相互抵消，PCB板作为分流器的连接线固定了围垦面积，解决了由于导线连接围垦面积的不确定因素，同时解决双绞线松散的不确定因素，有效地降低了由外界交变磁场干扰而产生感应电流，抗干扰能力强、可靠性高。Compared with the prior art, the PCB lead plate of the present invention is at least a double-sided metal holed or multilayer metal holed PCB board, and the PCB lead plate is provided with a voltage connection terminal and a second circuit corresponding to the shunt. A sampling connection end and a second sampling connection end; the circuit of the first sampling connection end on the PCB lead board is close to the resistor body of the shunt and extends to the second sampling connection end position, and is connected to the second sampling connection end circuit Through the cross-section of the PCB lead plate, the stranded state extends to the other end of the PCB lead plate, forming a first sampling circuit Iin+ and a second sampling circuit Iin- for sampling the shunt. With this arrangement, the hole-stranded circuit can effectively suppress electromagnetic interference like a twisted pair. This is not only the small loop area between the two circuits in the hole-stranded state, but also the phase of the hole-stranded circuit. The currents induced on the two adjacent circuits have opposite directions, so they can cancel each other. The PCB board is used as the connecting wire of the shunt to fix the reclamation area, which solves the uncertain factors of the reclamation area due to the wire connection, and solves the loose twisted-pair wire. Uncertain factors effectively reduce the induced current generated by the external alternating magnetic field interference, with strong anti-interference ability and high reliability.
附图说明Description of the drawings
图1是本发明第一实施方式分流器引线结构分流器的结构示意图；FIG. 1 is a schematic structural diagram of a shunt with a shunt lead structure according to a first embodiment of the present invention;
图2是本发明第一实施方式分流器引线结构的结构示意图。2 is a schematic diagram of the structure of the shunt lead structure in the first embodiment of the present invention.
图3是本发明第一实施方式分流器引线结构PCB引线板的结构示意图。3 is a schematic diagram of the structure of the PCB lead plate of the shunt lead structure according to the first embodiment of the present invention.
图4是本发明第一实施方式分流器引线结构PCB引线板去除绝缘层后的结构示意图。4 is a schematic diagram of the structure of the PCB lead plate of the shunt lead structure after removing the insulating layer in the first embodiment of the present invention.
图5是本发明第二实施方式分流器引线结构分流器的结构示意图。Fig. 5 is a schematic diagram of a shunt with a shunt lead structure according to a second embodiment of the present invention.
图6是本发明第二实施方式的分流器引线结构的结构示意图。Fig. 6 is a schematic structural diagram of a shunt lead structure according to a second embodiment of the present invention.
图7为本发明第二实施方式分流器引线结构PCB引线板的结构示意图。FIG. 7 is a schematic diagram of the structure of the PCB lead plate of the shunt lead structure according to the second embodiment of the present invention.
图8是本发明第二实施方式分流器引线结构PCB引线板去除绝缘层后的结构示意图。FIG. 8 is a schematic diagram of the structure of the PCB lead plate of the shunt lead structure after removing the insulating layer in the second embodiment of the present invention.
图9是本发明第一实施方式分流器引线结构使用环境的结构示意图。FIG. 9 is a schematic structural diagram of the use environment of the shunt lead structure in the first embodiment of the present invention.
图10是本发明第二实施方式分流器引线结构使用环境的结构示意图。Fig. 10 is a schematic structural diagram of the use environment of the shunt lead structure in the second embodiment of the present invention.
图11是图10中另一角度的结构示意图。FIG. 11 is a schematic diagram of the structure in FIG. 10 from another angle.
附图标记：Reference signs:
接线端钮盒         100、100’   端钮盒          101 Terminal button box 100, 100' Terminal button box 101
连接端钮           102          分流器引线结构  1 Connection terminal button 102 shunt lead structure 1
分流器             2、2’       电压端          21、21’ Splitter 2, 2'Voltage side 21, 21'
第一取样端         22、22’     第二取样端      23、23’The first sampling port 22, 22' The second sampling port 23, 23'
电阻体             20、20’     PCB引线板       3、3’ Resistor body 20, 20' PCB lead board 3, 3'
电压连接端         31、31’     电压连接电路    5 Voltage connection terminal 31, 31' Voltage connection circuit 5
第一取样连接端     32、32’     第一取样电路    321The first sampling connection terminal 32, 32' The first sampling circuit 321
                               Iin+Iin+
第二取样连接端     33、33’     第二取样电路    331Second sampling connection terminal 33, 33' Second sampling circuit 331
                               Iin-Iin-
第一层             301         上连接片体组     3011The first layer 301 301 upper connection sheet body group 3011
连接端             3012        第一上连接片体   3013 Connecting end 3012 First upper connecting piece 3013
第二上连接片体     3014        第二层           302The second upper connection sheet 3014 The second layer 302
下连接片体组       3021        连接端           3022Next connection piece group 3021 Connecting end 3022
第一下连接片体     3023        第二下连接片体   3024The first lower connecting piece 3023 The second lower connecting piece 3024
电性连接柱         4 Electrical connection column 4
具体实施方式Detailed ways
现在将参照附图来详细描述本发明的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本发明的范围。Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless specifically stated otherwise, the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention.
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本发明及其应用或使用的任何限制。The following description of at least one exemplary embodiment is actually only illustrative, and in no way serves as any limitation to the present invention and its application or use.
对于相关领域普通技术人员已知的技术和设备可能不作详细讨论，但在适当情况下，所述技术和设备应当被视为说明书的一部分。The technology and equipment known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the technology and equipment should be regarded as part of the specification.
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiment may have different values.
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某 一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。It should be noted that similar reference numerals and letters indicate similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.
在分流器应用领域，作为业内谙熟市场需求的供应商，伟达电子有限公司对现有技术中存在的问题十分了解，其研发队伍在自身已经拥有的独创技术基础上进一步投入巨资，进行长时间且大量的试验、方案筛选，以及大量的客户调查，终于得到本发明的技术方案。In the field of shunt application, as a supplier familiar with the market demand in the industry, Weida Electronics Co., Ltd. is fully aware of the problems existing in the existing technology. Its R&D team has further invested heavily on the basis of its own original technology Time and a large number of trials, program screening, and a large number of customer surveys finally obtained the technical solution of the present invention.
请参图1至11所示，为本发明分流器引线结构1的结构示意图。本发明分流器引线结构1包括分流器2和PCB引线板3，所述分流器2上设有电阻体20，所述分流器2围绕所述电阻体20至少设有一个电压端21和二个取样端22、23，所述分流器2沿电流的流向方向顺序设置所述电压端21、第一取样端22、第二取样端23；所述的PCB引线板3至少是双面金属孔化或多层金属孔化的PCB板，所述PCB引线板3上设有分别与分流器2电压端21、第一取样端22、第二取样端23相对应的电压连接端31、第一取样连接端32、第二取样连接端33；所述的PCB引线板3上的第一取样连接端32的电路贴近(如平行沿着，平行沿着不代表必须直线延伸)所述分流器2的电阻体20延伸至第二取样连接端33的位置，与第二取样连接端33电路通过PCB引线板3截面孔化绞合状态延伸至PCB引线板3另一端，形成第一取样电路Iin+321和第二取样电路Iin-331用以实现对分流器2采样。Please refer to FIGS. 1 to 11, which are schematic structural diagrams of the shunt lead structure 1 of the present invention. The shunt lead structure 1 of the present invention includes a shunt 2 and a PCB lead plate 3. The shunt 2 is provided with a resistor 20, and the shunt 2 surrounds the resistor 20 with at least one voltage terminal 21 and two Sampling terminals 22, 23, the shunt 2 is provided with the voltage terminal 21, the first sampling terminal 22, and the second sampling terminal 23 in sequence along the direction of the current flow; the PCB lead plate 3 is at least double-sided with metal holes Or a multi-layer metal hole PCB board, the PCB lead board 3 is provided with a voltage connection terminal 31 and a first sampling terminal respectively corresponding to the voltage terminal 21, the first sampling terminal 22, and the second sampling terminal 23 of the shunt 2 The connection end 32, the second sampling connection end 33; the circuit of the first sampling connection end 32 on the PCB lead board 3 is close to (such as parallel along, parallel along does not mean that it must extend in a straight line) of the shunt 2 The resistor body 20 extends to the position of the second sampling connection end 33, and the circuit with the second sampling connection end 33 extends to the other end of the PCB lead board 3 through the cross-sectional hole of the PCB lead plate 3 to form a first sampling circuit Iin+321 And the second sampling circuit Iin-331 is used to realize the sampling of the shunt 2.
如此设置，所述的PCB引线板3上的第一取样连接端32的电路贴近对应分流器2的电阻体20延伸至第二取样连接端33位置；与第二取样连接端33电路通过PCB板截面孔化绞合状态延伸至PCB引线板3另一端，形成第一取样电路Iin+321和第二取样电路Iin-331，为分流器2采样，从而进一步电连接于主电路板(未图示)。如此可使第一取样连接端32的电路延伸至第二取样连接端33的长度大致与分流器2第一取样端22和第二取样端23之间的电阻体20长度相同。根据法拉第定律，当穿过某一个不闭合线圈的磁通量发生变化时，线圈中虽无感应电流，但感应电动势依旧存在。当一段导体在匀强磁场中做匀速切割磁感线运动时，不论电路是否闭合，感应电动势E的大小只与磁感应强度B、导体长度L、切割速度v及v和B方向间夹角θ的正弦值成正比，即E＝BLvsinθ (θ为B，L，v三者间通过互相转化两两垂直所得的角)，当外界的磁感应强度B，切割速度v及v和B方向间夹角θ的正弦值相同时，导体长度L决定了感应电动势的大小；要使闭合电路中有电流，这个电路中必须有电源，因为电流是由电源的电动势引起的，在电磁感应现象里，既然闭合电路里有感应电流，那么这个电路中也必定有电动势。With this arrangement, the circuit of the first sampling connection terminal 32 on the PCB lead board 3 is close to the resistor body 20 of the corresponding shunt 2 and extends to the position of the second sampling connection terminal 33; the circuit with the second sampling connection terminal 33 passes through the PCB board The cross-sectional hole-stranded state extends to the other end of the PCB lead plate 3 to form a first sampling circuit Iin+321 and a second sampling circuit Iin-331, which are used for sampling by the shunt 2 and are further electrically connected to the main circuit board (not shown) ). In this way, the length of the circuit of the first sampling connection terminal 32 extending to the second sampling connection terminal 33 is approximately the same as the length of the resistor body 20 between the first sampling terminal 22 and the second sampling terminal 23 of the shunt 2. According to Faraday's law, when the magnetic flux passing through a certain unclosed coil changes, although there is no induced current in the coil, the induced electromotive force still exists. When a section of conductor cuts the magnetic line of induction at a constant speed in a uniform magnetic field, no matter whether the circuit is closed or not, the magnitude of the induced electromotive force E is only the angle θ between the magnetic induction intensity B, the conductor length L, the cutting speed v and v and the B direction. The sine value is proportional, that is, E=BLvsinθ (θ is the angle between B, L, and v by converting each other to be perpendicular to each other). When the external magnetic induction intensity B, the cutting speed v and the angle between v and the B direction θ When the sine value of is the same, the conductor length L determines the magnitude of the induced electromotive force; if there is a current in the closed circuit, there must be a power supply in this circuit, because the current is caused by the electromotive force of the power supply. In the electromagnetic induction phenomenon, since the circuit is closed If there is an induced current, there must be an electromotive force in this circuit.
PCB引线板3的取样电路另一端电连接于主线路板负载后形成了整个闭合回路；在外界交变磁场干扰时整个闭合回路产生了感应电流；由此可见，PCB引线板3上的第一取样连接端32的延伸电路到第二取样连接端33位置后，与对应分流器2的第一取样端22和第二取样端23之间的电阻体20长度大致相同；与PCB引线板3上的第二取样电路Iin-331通过PCB引线板3截面孔化绞合状态延伸至PCB引线板3另一端，两个取样电路321、331绞合状态延伸的长度也相同；即第一取样电路Iin+321的总长度与对应电阻体20长度和第二取样电路Iin-331相加的总长度大致相同，两个取样端电路321、331感应电动势E也大致相同，极性相反相互抵消。The other end of the sampling circuit of the PCB lead board 3 is electrically connected to the main circuit board load to form an entire closed loop; when the external alternating magnetic field interferes, the entire closed loop generates an induced current; it can be seen that the first on the PCB lead board 3 After the extension circuit of the sampling connection terminal 32 reaches the position of the second sampling connection terminal 33, the length of the resistor body 20 between the first sampling terminal 22 and the second sampling terminal 23 of the corresponding shunt 2 is approximately the same; The second sampling circuit Iin-331 of the second sampling circuit Iin-331 extends to the other end of the PCB lead plate 3 through the cross-section of the PCB lead plate 3 in a perforated and twisted state, and the two sampling circuits 321 and 331 have the same extended length in the twisted state; that is, the first sampling circuit Iin The total length of +321 is approximately the same as the total length of the sum of the length of the corresponding resistor 20 and the second sampling circuit Iin-331. The induced electromotive force E of the two sampling end circuits 321 and 331 is also approximately the same, and the opposite polarities cancel each other out.
根据法拉第电磁感应定律，只要穿过闭合电路的磁通量发生变化，闭合电路中就有电流产生。产生感应电流必须符合两个条件：(1)闭合的电路，(2)磁通量变化；磁通量公式Φ＝BS(磁通量Φ＝磁通密度Bx围垦面积S)，当干扰磁通密度是恒定的，电路是闭合时，那么只有围垦面积大小决定磁通量的大小。也就是两个取样电路321、331以及与电阻体20之间围垦的面积大小决定了磁通量的大小；围垦的面积越小磁通量就越小，产生的感应电流就越小。According to Faraday's law of electromagnetic induction, as long as the magnetic flux passing through a closed circuit changes, current will be generated in the closed circuit. The induced current must meet two conditions: (1) closed circuit, (2) magnetic flux change; magnetic flux formula Φ = BS (magnetic flux Φ = magnetic flux density Bx reclamation area S), when the interference magnetic flux density is constant, the circuit When it is closed, only the size of the reclamation area determines the size of the magnetic flux. That is, the size of the magnetic flux between the two sampling circuits 321, 331 and the enclosed area with the resistor 20 determines the size of the magnetic flux; the smaller the enclosed area, the smaller the magnetic flux and the smaller the induced current.
本发明采用PCB板作为分流器2的连接线固定了围垦面积，解决了由于导线连接围垦面积的不确定因素，同时解决双绞线松散的不确定因素，有效地降低了由外界交变磁场干扰而产生感应电流。The invention uses the PCB board as the connecting wire of the shunt 2 to fix the reclamation area, solves the uncertain factors of the reclamation area due to the wire connection, and at the same time solves the uncertain factors of the loose twisted pair, and effectively reduces the interference from the external alternating magnetic field. And an induced current is generated.
具体的，PCB引线板3截面孔化绞合状态包括：在PCB引线板3上设有呈上下两层设置的上连接片体组3011和下连接片体组3021，所述上连接片体组3011包括若干前后间隔排列的倾斜状上连接片体，下连接片体组3021包括若干沿着上连接片体排列方向间隔排列的下连接片体，上下位置相应的所述上连接片体 与下连接片体呈相互交叉状，所述上连接片体与下连接片体两端均设有连接端3012、3022，所述PCB引线板3上设有上下延伸的电性连接柱4，前后相邻的上连接片体与下连接片体通过电性连接柱4相互电性连接从而分别形成所述第一取样电路Iin+321和第二取样电路Iin-331。所述“前后“”可以是PCB引线板3上的上连接片体组3011和下连接片体组3021的任意排列方向，上连接片体组3011和下连接片体组3021呈直线排布或非直线排布均在本发明的保护范围内。如此设置，第一取样电路Iin+321和第二取样电路Iin-331可形成较稳定的截面孔化绞合状态，孔化绞合状态的电路像双绞线一样能够有效地抑制电磁干扰，这不仅是孔化绞合状态的两电路之间具有很小的回路面积，而且孔化绞合电路上相邻两回路上感应出的电流具有相反的方向，因此可以相互抵消，使PCB板作为分流器2的连接线固定围垦面积，解决双绞线松散的不确定因素，抗干扰能力强、可靠性高。所述电性连接柱4可以为中空状或实心状等。Specifically, the cross-sectional hole-stranded state of the PCB lead plate 3 includes: an upper connection piece group 3011 and a lower connection piece group 3021 arranged in two upper and lower layers are provided on the PCB lead plate 3, the upper connection piece group 3011 includes a plurality of inclined upper connecting pieces arranged at intervals in front and rear, and the lower connecting piece group 3021 includes a plurality of lower connecting pieces arranged at intervals along the arrangement direction of the upper connecting pieces. The connecting pieces are in a cross shape. Both ends of the upper connecting piece and the lower connecting piece are provided with connecting ends 3012 and 3022. The PCB lead plate 3 is provided with electrical connecting posts 4 extending up and down. The adjacent upper connecting piece body and the lower connecting piece body are electrically connected to each other through the electrical connecting column 4 to form the first sampling circuit Iin+321 and the second sampling circuit Iin-331, respectively. The "front and rear" can be any arrangement direction of the upper connecting piece group 3011 and the lower connecting piece group 3021 on the PCB lead board 3, and the upper connecting piece group 3011 and the lower connecting piece group 3021 are arranged in a straight line or The non-linear arrangement is within the protection scope of the present invention. With this arrangement, the first sampling circuit Iin+321 and the second sampling circuit Iin-331 can form a relatively stable cross-sectional hole-stranded state, and a circuit in the hole-stranded state Like twisted pair, it can effectively suppress electromagnetic interference. This is not only a small loop area between the two circuits in the perforated stranded state, but also the current induced on the adjacent two loops on the perforated stranded circuit is opposite Therefore, the PCB board can be used as the connection line of the shunt 2 to fix the reclamation area, solve the uncertain factors of the loose twisted pair, and have strong anti-interference ability and high reliability. The electrical connection column 4 can be Hollow or solid, etc.
所述PCB引线板3还设有位于第一取样电路Ii，n+321和第二取样电路Iin-331旁侧的电压连接电路55，所述电压连接电路55连接所述分流器2的电压端21。电流经过所述分流器2后会转换为对应的电压信号，取样的电压信号经过一阶RC滤波电路后进入AD计量芯片中，并经过转化计算出电流，实现电流的计量。如此设置，所述分流器引线结构1可实现对分流器2上电压的检测，从而通过所述计量转化装置计算出电流。The PCB lead plate 3 is also provided with a voltage connection circuit 55 beside the first sampling circuit Ii, n+321 and the second sampling circuit Iin-331, and the voltage connection circuit 55 is connected to the voltage terminal of the shunt 2 twenty one. The current is converted into a corresponding voltage signal after passing through the shunt 2, and the sampled voltage signal enters the AD metering chip after passing through the first-order RC filter circuit, and the current is calculated through conversion to realize current measurement. With this arrangement, the shunt lead structure 1 can detect the voltage on the shunt 2 so that the current can be calculated by the metering conversion device.
在本发明的不同实施方式中，所述的第一取样端22和第二取样端23分别设置于分流器2电阻体20上或分流器2电阻体20侧方。即，所述第一取样端22可设置分流器2电阻体20上或侧方，所述第二取样端23可设置分流器2电阻体20上或侧方，如此可实现对电阻体20两侧电压的取样。In different embodiments of the present invention, the first sampling terminal 22 and the second sampling terminal 23 are respectively arranged on the resistor body 20 of the shunt 2 or on the side of the resistor body 20 of the shunt 2. That is, the first sampling terminal 22 can be arranged on or on the side of the resistor body 20 of the shunt 2 and the second sampling terminal 23 can be arranged on or on the side of the resistor body 20 of the shunt 2. Sampling of side voltage.
在本发明不同实施方式中，所述的PCB引线板3紧贴平行于所述分流器2表面上或者所述的PCB引线板3紧贴垂直于所述分流器2上。具体请参图1至4及图9所示，为本发明第一实施方式的分流器引线结构1结构示意图以及接线端钮盒100结构示意图，在第一实施方式中，所述PCB引线板3紧贴平行于所述分流器2表面上，且在图1至图2所示的实施方式中，电流自左向右流经所 述分流器2。具体请参图5至8及图10至11所示，为本发明第二实施方式的分流器引线结构1结构示意图以及接线端钮盒100结构示意图，在第二实施方式中，所述的PCB引线板3’紧贴垂直于所述分流器2’上，第二实施方式与第一实施方式的区别在于，用以安装于接线端钮盒100’的分流器2’的电压端21’、第一取样端22’、第二取样端23’的位置以及PCB引线板3’上的电压连接端31’、第一取样连接端32’、第二取样连接端33’的相互之间位置不同，PCB引线板3’垂直于所述电阻体20’。且在图5至图6所示的实施方式中，电流自右向左流经所述分流器2。如此，可减小围垦面积，进一步降低由外界交变磁场干扰而产生感应电流。本发明不限于第一实施方式及第二实施方式两种实施方式。在本发明不同实施方式中，电流流向可做其他方向的改变，相应的电压端、第一取样端、第二取样端的相互位置可作调整，但仍然在本发明的保护范围内。In different embodiments of the present invention, the PCB lead plate 3 is close to and parallel to the surface of the shunt 2 or the PCB lead plate 3 is close to and perpendicular to the shunt 2. For details, please refer to Figures 1 to 4 and Figure 9, which are the structural schematic diagram of the shunt lead structure 1 and the structural schematic diagram of the terminal button box 100 according to the first embodiment of the present invention. In the first embodiment, the PCB lead plate 3 It is closely parallel to the surface of the shunt 2 and in the embodiment shown in FIGS. 1 to 2, the current flows through the shunt 2 from left to right. For details, please refer to Figures 5 to 8 and Figures 10 to 11, which are a schematic structural diagram of the shunt lead structure 1 and a schematic structural diagram of the terminal button box 100 according to the second embodiment of the present invention. In the second embodiment, the PCB The lead plate 3'is closely attached to the shunt 2'perpendicularly to the shunt 2'. The difference between the second embodiment and the first embodiment is that the voltage terminal 21' and the shunt 2'are installed on the terminal button box 100' The positions of the first sampling end 22', the second sampling end 23', and the voltage connection end 31', the first sampling connection end 32', and the second sampling connection end 33' on the PCB lead board 3'are different from each other. , The PCB lead plate 3'is perpendicular to the resistor body 20'. Moreover, in the embodiments shown in FIGS. 5 to 6, the current flows through the shunt 2 from right to left. In this way, the reclamation area can be reduced, and the induced current generated by the interference of the external alternating magnetic field can be further reduced. The present invention is not limited to both the first embodiment and the second embodiment. In different embodiments of the present invention, the current flow direction can be changed in other directions, and the relative positions of the voltage terminal, the first sampling terminal, and the second sampling terminal can be adjusted, but it is still within the protection scope of the present invention.
PCB引线板3上第一取样连接端32的电路延伸至第二取样连接端33的长度与分流器2上第一取样端22和第二取样端23之间的电阻体20长度相同。所述长度相同是指大致相同即可。根据法拉第定律，当闭合回路的一部份导体在磁场中作切割磁力线动动时，此闭合回路中的磁通量一定会发生变化，在闭合回路中就产生了感应电动势，从而产生了感应电流。由此可见，现有技术中的分流器结构未解决分流器2两个取样端之间的电阻体20在在外界交变磁场干扰时产生的感应电动势的问题，本发明PCB引线板3上的第一取样连接端32的延伸电路到第二取样连接端33位置后，与对应分流器2的第一取样端22和第二取样端23之间的电阻体20长度大致相同，解决了电阻体20上产生的感应电动势。The length of the circuit extending from the first sampling connection terminal 32 on the PCB lead board 3 to the second sampling connection terminal 33 is the same as the length of the resistor body 20 between the first sampling terminal 22 and the second sampling terminal 23 on the shunt 2. The same length means substantially the same. According to Faraday's law, when a part of the conductor of a closed loop cuts the magnetic field of force in a magnetic field, the magnetic flux in the closed loop must change, and an induced electromotive force is generated in the closed loop, thereby generating an induced current. It can be seen that the shunt structure in the prior art does not solve the problem of the induced electromotive force generated by the resistor 20 between the two sampling ends of the shunt 2 when the external alternating magnetic field interferes. The PCB lead plate 3 of the present invention After the extension circuit of the first sampling connection terminal 32 reaches the position of the second sampling connection terminal 33, the length of the resistor body 20 between the first sampling terminal 22 and the second sampling terminal 23 of the corresponding shunt 2 is approximately the same, which solves the problem of 20 induced electromotive force.
PCB引线板3上第一取样连接端32延伸电路的背面与分流器2绝缘紧贴。如此，所述的PCB引线板3紧贴于分流器2上，可进一步减少围垦面积，更好地降低由外界交变磁场干扰而产生感应电流，且避免PCB引线板3与分流器2之间发生短路。The back side of the extension circuit of the first sampling connection terminal 32 on the PCB lead plate 3 is insulated and tightly attached to the shunt 2. In this way, the PCB lead plate 3 is closely attached to the shunt 2, which can further reduce the reclamation area, better reduce the induced current caused by the external alternating magnetic field interference, and avoid the PCB lead plate 3 and the shunt 2 A short circuit occurred.
优选的，本发明所述分流器2可以为锰铜分流器。如此设置，锰铜分流器与本发明PCB引线板3相结合可使本发明分流器引线结构1的取样准确度较高、温度影响较小、成本低。Preferably, the flow divider 2 of the present invention may be a manganin flow divider. With this arrangement, the combination of the manganese-copper shunt and the PCB lead plate 3 of the present invention can enable the shunt lead structure 1 of the present invention to have higher sampling accuracy, less temperature influence, and low cost.
本发明可用以制造一种电力仪表，包括电力仪表外壳，所述电力仪表外壳内设有取样装置、对取样装置测得的信号进行转化运算的计量装置、将计量结果向用户显示的计量显示装置，所述取样装置包括接线端钮盒100，所述接线端钮盒100包括端钮盒101，安装于端钮盒101上的连接端钮102，所述连接端钮102用以与外界电力输入输出线路连接，所述连接端钮102与上述分流器引线结构1相连接。如此设置，所述电力仪表在对用户用电量的检测时准确度较高、温度影响较小、成本低。The present invention can be used to manufacture a power meter, including a power meter housing, in which a sampling device, a metering device for transforming and calculating the signal measured by the sampling device, and a metering display device for displaying the metering results to the user are provided in the power meter housing , The sampling device includes a terminal button box 100, the terminal button box 100 includes a terminal button box 101, a connection terminal button 102 installed on the terminal button box 101, the connection terminal button 102 is used to input power The output line is connected, and the connection terminal button 102 is connected with the aforementioned shunt lead structure 1. With this arrangement, the power meter has high accuracy, low temperature influence, and low cost when detecting the user's power consumption.
本发明提供一种分流器引线结构1的制造方法，包括用以贴置安装于分流器2上的PCB引线板3，所述PCB引线板3设有用以与所述分流器2相对应的电压连接电路5、第一取样电路Iin+321与第二取样电路Iin-331，所述第一取样电路Iin+321与第二取样电路Iin-331用以电性连接分流器2的两个取样端，所述PCB引线板3制造方法包括：The present invention provides a method for manufacturing a shunt lead structure 1, which includes a PCB lead plate 3 mounted on the shunt 2, and the PCB lead plate 3 is provided with a voltage corresponding to the shunt 2 The connection circuit 5, the first sampling circuit Iin+321 and the second sampling circuit Iin-331, the first sampling circuit Iin+321 and the second sampling circuit Iin-331 are used to electrically connect the two sampling terminals of the shunt 2 , The manufacturing method of the PCB lead plate 3 includes:
制备PCB底板，所述底板设置上下相互电力隔绝的第一层301与第二层302；Prepare a PCB bottom plate, the bottom plate is provided with a first layer 301 and a second layer 302 that are electrically isolated from each other from above and below;
所述第一层301上设置前后排布的第一上连接片体3013、第二上连接片体3014，所述第二层302上设置前后排布的第一下连接片体3023、第二下连接片体3024；The first layer 301 is provided with a first upper connecting sheet 3013 and a second upper connecting sheet 3014 arranged in front and rear, and the second layer 302 is provided with a first lower connecting sheet 3023 and a second connecting sheet 3023 arranged in front and rear. Lower connecting piece body 3024;
所述底板上设置贯穿第一层301与第二层302的第一穿孔和第二穿孔，所述第二穿孔位于第一穿孔旁侧；The bottom plate is provided with a first through hole and a second through hole penetrating through the first layer 301 and the second layer 302, and the second through hole is located beside the first through hole;
在所述第一穿孔内设置第一电性连接柱4，所述第一电性连接柱4电性连接所述第一上连接片体3013与所述第二下连接片体3024，用以形成所述第一取样电路Iin+321；所述第二穿孔内设置第二电性连接柱4，所述第二电性连接柱4电性连接所述第一下连接片体3023与所述第二上连接片体3014，用以形成第二取样电路Iin-331；A first electrical connection post 4 is provided in the first through hole, and the first electrical connection post 4 is electrically connected to the first upper connection piece 3013 and the second lower connection piece 3024 for The first sampling circuit Iin+321 is formed; a second electrical connection post 4 is provided in the second through hole, and the second electrical connection post 4 is electrically connected to the first lower connection piece 3023 and the The second upper connecting piece 3014 is used to form a second sampling circuit Iin-331;
所述第一上连接片体3013与第一下连接片体3023在所述底板上上下位置相对但走向呈一交叉角度，所述第二上连接片体3014与第二下连接片体3024分别在所述底板上上下位置相对但走向呈一交叉角度。The first upper connecting piece 3013 and the first lower connecting piece 3023 are opposite to each other on the bottom plate but running at a crossing angle. The second upper connecting piece 3014 and the second lower connecting piece 3024 are respectively The upper and lower positions on the bottom plate are opposite but the direction is at a crossing angle.
如此设置，可有效制造所述PCB引线板3，当所述PCB引线板3安装于相应 的分流器2，可制造供用户检测用电量的电力仪表，所述电力仪表可有效地降低由外界交变磁场干扰而产生感应电流，对外界环境适应性强，准确度较高，温度影响较小，成本低。With this arrangement, the PCB lead plate 3 can be effectively manufactured. When the PCB lead plate 3 is installed in the corresponding shunt 2, a power meter for users to detect power consumption can be manufactured. The power meter can effectively reduce The alternating magnetic field interferes with the induced current, which has strong adaptability to the external environment, high accuracy, low temperature influence and low cost.
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。本文所使用的术语“或/及”包括一个或多个相关的所列项目的任意的和所有的组合。Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "or/and" as used herein includes any and all combinations of one or more related listed items.
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification.
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。The above-mentioned embodiments only express several embodiments of the present invention, and the descriptions are more specific and detailed, but they should not be understood as limiting the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (21)

  1. 一种分流器引线结构，其特性在于：包括分流器和PCB引线板，A shunt lead structure, the characteristics of which are: a shunt and a PCB lead plate,
    所述分流器设有电阻体，所述分流器围绕所述电阻体并沿电流的流向方向顺序设置有电压端、第一取样端、第二取样端；The shunt is provided with a resistor body, and the shunt surrounds the resistor body and is sequentially provided with a voltage terminal, a first sampling terminal, and a second sampling terminal along the direction of current flow;
    所述的PCB引线板至少是双面金属孔化或多层金属孔化的PCB板，所述PCB引线板上设有与分流器电压端、第一取样端、第二取样端相对应的电压连接端、第一取样连接端、第二取样连接端；The PCB lead plate is at least a double-sided metal hole or multilayer metal hole PCB board, and the PCB lead plate is provided with voltages corresponding to the shunt voltage terminal, the first sampling terminal, and the second sampling terminal. Connection end, first sampling connection end, second sampling connection end;
    所述的PCB引线板上的第一取样连接端的电路贴近所述分流器的电阻体延伸至第二取样连接端位置，并与第二取样连接端电路通过PCB引线板截面孔化绞合状态延伸至PCB引线板另一端，形成第一取样电路Iin+和第二取样电路Iin-用以实现对分流器采样。The circuit of the first sampling connection end on the PCB lead board is close to the resistor body of the shunt and extends to the position of the second sampling connection end, and extends with the second sampling connection end circuit through the cross section of the PCB lead board. To the other end of the PCB lead plate, a first sampling circuit Iin+ and a second sampling circuit Iin- are formed to realize sampling of the shunt.
  2. 根据权利要求1所述的一种分流器引线结构，其特性在于：PCB引线板截面孔化绞合状态包括，在PCB引线板上设有呈上下多层设置的上连接片体和下连接片体，所述上连接片体与下连接片体上下位置相应且呈相互交叉状设置。The shunt lead structure according to claim 1, characterized in that: the cross-section of the PCB lead plate is perforated and stranded. The PCB lead plate is provided with an upper connecting piece and a lower connecting piece arranged in multiple layers up and down. The upper and lower connecting sheet bodies correspond to the upper and lower positions of the upper and lower connecting sheet bodies and are arranged in a mutually intersecting shape.
  3. 根据权利要求1所述的一种分流器引线结构，其特性在于：PCB引线板截面孔化绞合状态包括，在PCB引线板上设有呈上下多层设置的上连接片体组和下连接片体组，所述上连接片体组包括若干前后间隔排列的上连接片体，下连接片体组包括若干沿着上连接片体排列方向间隔排列的下连接片体，上下位置相应的所述上连接片体与下连接片体呈相互交叉状设置，所述上连接片体与下连接片体均设有连接端，相贴近的所述上连接片体的连接端与下连接片体的连接端相电性连接。The shunt lead structure according to claim 1, characterized in that: the cross-section of the PCB lead plate is perforated and stranded. The PCB lead plate is provided with an upper connection piece group and a lower connection which are arranged in upper and lower layers. The sheet body group, the upper connecting sheet body group includes a plurality of upper connecting sheet bodies arranged at intervals in front and rear, and the lower connecting sheet body group includes a plurality of lower connecting sheets arranged at intervals along the upper connecting sheet body arrangement direction, and the upper and lower positions corresponding to the upper connecting sheet bodies are arranged at intervals. The upper connecting piece body and the lower connecting piece body are arranged in a cross shape, and the upper connecting piece body and the lower connecting piece body are both provided with connecting ends, and the connecting ends of the upper connecting piece body and the lower connecting piece body are close to each other. The connection ends are electrically connected.
  4. 根据权利要求3所述的一种分流器引线结构，其特性在于：所述PCB引线板上设有上下延伸的电性连接柱，沿前后排列方向相邻的上连接片体与下连接片体通过电性连接柱相互电性连接从而分别形成所述第一取样电路Iin+和第二取样电路Iin-。The shunt lead structure according to claim 3, characterized in that: the PCB lead plate is provided with electrical connection posts extending up and down, and the upper and lower connection plates are adjacent in the front-to-back arrangement direction. The first sampling circuit Iin+ and the second sampling circuit Iin- are formed by electrical connection with each other through the electrical connection posts.
  5. 根据权利要求4所述的一种分流器引线结构，其特性在于：所述PCB引 线板上先在上下相对的连接端上进行截面孔化形成穿孔，后在所述穿孔内进行金属注入或植入，形成所述电性连接柱。The shunt lead structure according to claim 4, characterized in that: the PCB lead plate is firstly formed by boring cross-sections on the upper and lower connection ends to form perforations, and then metal injection or implantation is performed in the perforations. Into, the electrical connection post is formed.
  6. 根据权利要求3所述的一种分流器引线结构，其特性在于：在PCB引线板上设有呈上下两层设置的上连接片体组和下连接片体组。The shunt lead structure according to claim 3, characterized in that: an upper connecting piece group and a lower connecting piece group are arranged in two layers on the PCB lead board.
  7. 根据权利要求1所述的一种分流器引线结构，其特性在于：电流经过所述分流器后转换为对应的电压信号，取样的电压信号经过一阶RC滤波电路后进入AD计量芯片中，并经过转化计算出电流，实现电流的计量。The shunt lead structure according to claim 1, characterized in that: the current is converted into a corresponding voltage signal after passing through the shunt, and the sampled voltage signal enters the AD metering chip after passing through the first-order RC filter circuit, and The current is calculated after conversion, and the current measurement is realized.
  8. 根据权利要求1所述的一种分流器引线结构，其特性在于：所述的第一取样端和第二取样端分别设置于分流器电阻体上或分流器电阻体侧方。The shunt lead structure according to claim 1, characterized in that the first sampling end and the second sampling end are respectively arranged on the shunt resistor or on the side of the shunt resistor.
  9. 根据权利要求1所述的一种分流器引线结构，其特性在于：所述的PCB引线板紧贴平行于所述分流器表面上。The shunt lead structure according to claim 1, characterized in that: the PCB lead plate is close to and parallel to the surface of the shunt.
  10. 根据权利要求1所述的一种分流器引线结构，其特性在于：所述的PCB引线板紧贴垂直于所述分流器上。The shunt lead structure according to claim 1, characterized in that: the PCB lead plate is close to and perpendicular to the shunt.
  11. 根据权利要求1所述的一种分流器引线结构，其特性在于：PCB引线板上第一取样连接端的电路延伸至第二取样连接端的长度与分流器上第一取样端和第二取样端之间的电阻体长度相同。The shunt lead structure according to claim 1, characterized in that: the length of the circuit of the first sampling connection end on the PCB lead board extending to the second sampling connection end and the difference between the first sampling end and the second sampling end on the shunt The length of the resistor body between the two is the same.
  12. 根据权利要求1所述的一种分流器引线结构，其特性在于：PCB引线板上第一取样连接端延伸电路的背面与分流器绝缘紧贴。The shunt lead structure according to claim 1, characterized in that the back surface of the extension circuit of the first sampling connection end on the PCB lead board is insulated and closely adhered to the shunt.
  13. 根据权利要求1所述的一种分流器引线结构，其特性在于：所述分流器为锰铜分流器。A shunt lead structure according to claim 1, characterized in that: the shunt is a manganin shunt.
  14. 一种电力仪表，其特征在于：包括电力仪表外壳，所述电力仪表外壳内设有取样装置、对取样装置测得的信号进行转化运算的计量装置、将计量结果向用户显示的计量显示装置，所述取样装置包括接线端钮盒，所述接线端钮盒包括端钮盒，安装于端钮盒上的连接端钮，所述连接端钮用以与外界电力输入输出线路连接，所述连接端钮与根据权利要求1至13任意一项所述的分流器引线结构相连接。An electric power meter, characterized in that it comprises a power meter housing, in which a sampling device, a metering device for transforming and calculating the signal measured by the sampling device, and a metering display device for displaying the metering results to the user are provided in the power meter housing, The sampling device includes a terminal button box, the terminal button box includes a terminal button box, a connection terminal button installed on the terminal button box, and the connection terminal button is used to connect to an external power input and output line. The terminal button is connected with the shunt lead structure according to any one of claims 1 to 13.
  15. 一种分流器引线结构的制造方法，其特征在于：包括用以贴置于分流 器上的PCB引线板，所述PCB引线板设有用以与所述分流器相对应的电压连接电路、第一取样电路与第二取样电路，所述第一取样电路与第二取样电路用以电性连接分流器的两个取样端，所述PCB引线板制造方法包括：A method for manufacturing a shunt lead structure, which is characterized in that it comprises a PCB lead plate to be attached to the shunt, and the PCB lead plate is provided with a voltage connection circuit corresponding to the shunt, a first A sampling circuit and a second sampling circuit, the first sampling circuit and the second sampling circuit are used to electrically connect the two sampling ends of the shunt, and the manufacturing method of the PCB lead plate includes:
    制备PCB底板，所述底板设置上下相互电力隔绝的第一层与第二层；Preparing a PCB bottom plate, wherein the bottom plate is provided with a first layer and a second layer that are electrically isolated from each other from above and below;
    所述第一层上设置前后排布的第一上连接片体、第二上连接片体，所述第二层上设置前后排布的第一下连接片体、第二下连接片体，所述第一上连接片体与第一下连接片体在所述底板上上下位置相对但走向呈一交叉角度，所述第二上连接片体与第二下连接片体分别在所述底板上上下位置相对但走向呈一交叉角度；A first upper connecting sheet and a second upper connecting sheet are arranged on the first layer, and a first lower connecting sheet and a second lower connecting sheet are arranged on the second layer. The first upper connecting piece body and the first lower connecting piece body are opposite to each other on the bottom plate but the direction is at a crossing angle, and the second upper connecting piece body and the second lower connecting piece body are respectively on the bottom plate The upper and lower positions are opposite but the direction is at a crossing angle;
    所述底板上设置贯穿第一层与第二层的第一穿孔和第二穿孔，所述第二穿孔位于第一穿孔旁侧；The bottom plate is provided with a first through hole and a second through hole penetrating the first layer and the second layer, and the second through hole is located beside the first through hole;
    在所述第一穿孔内注入或植入金属，使所述第一上连接片体与所述第二下连接片体相互电性连接，用以形成所述第一取样电路；所述第二穿孔内注入或植入金属，使所述第一下连接片体与所述第二上连接片体电性连接，用以形成第二取样电路。Metal is injected or implanted into the first through hole to electrically connect the first upper connecting piece body and the second lower connecting piece body to form the first sampling circuit; the second Metal is injected or implanted into the through hole to electrically connect the first lower connecting piece body and the second upper connecting piece body to form a second sampling circuit.
  16. 根据权利要求15所述的一种分流器引线结构的制造方法，其特征在于：在所述PCB引线板的电压连接电路上穿设电压连接端穿孔，用以电性插接于分流器的电压端。15. The method for manufacturing a shunt lead structure according to claim 15, wherein a voltage connection terminal hole is drilled on the voltage connection circuit of the PCB lead plate to be electrically connected to the voltage of the shunt. end.
  17. 根据权利要求15所述的一种分流器引线结构的制造方法，其特征在于：在所述PCB引线板的第一取样电路上穿设第一取样连接端穿孔，用以电性插接于分流器的第一取样端。The method for manufacturing a shunt lead structure according to claim 15, wherein the first sampling circuit of the PCB lead plate is provided with a first sampling connection end hole for electrical plugging in the shunt. The first sampling end of the device.
  18. 根据权利要求17所述的一种分流器引线结构的制造方法，其特征在于：在所述PCB引线板的第二取样电路上穿设第二取样连接端穿孔，用以电性插接于分流器的第二取样端。18. The method for manufacturing a shunt lead structure according to claim 17, wherein a second sampling connection hole is penetrated on the second sampling circuit of the PCB lead plate for electrical plugging in the shunt. The second sampling end of the device.
  19. 根据权利要求18所述的一种分流器引线结构的制造方法，其特征在于：在所述PCB引线板的第一取样电路途径第二取样连接端穿孔附近。The method for manufacturing a shunt lead structure according to claim 18, wherein the first sampling circuit path of the PCB lead board is near the second sampling connection end perforation.
  20. 根据权利要求18所述的一种分流器引线结构的制造方法，其特征在于： 所述PCB引线板贴合于分流器上，所述分流器包括锰铜电阻体，所述第一取样连接端穿孔与第二取样连接端穿孔跨于锰铜电阻体两端。The method for manufacturing a shunt lead structure according to claim 18, wherein: the PCB lead plate is attached to the shunt, the shunt includes a manganin resistor, and the first sampling connection end The perforation and the second sampling connection end perforation span both ends of the manganin resistor.
  21. 根据权利要求19所述的一种分流器引线结构的制造方法，其特征在于：所述PCB引线板水平贴置或垂直贴置于分流器上。The manufacturing method of the shunt lead structure according to claim 19, wherein the PCB lead plate is placed on the shunt horizontally or vertically.
PCT/CN2020/132749 2020-02-28 2020-11-30 Shunt lead structure, electric power instrument and method for manufacturing shunt lead structure WO2021169456A1 (en)

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