阅读说明：本技术 一种用于抗电磁干扰的电子式电能表 (Electronic electric energy meter for resisting electromagnetic interference ) 是由 陈炎 邬永强 王佳琪 王萌 李明 傅红仙 于 2019-08-26 设计创作，主要内容包括：本发明公开了一种用于抗电磁干扰的电子式电能表,通过设置走线以所述电路板正面的所述第一通孔的所述上导电体为起点并以所述电路板背面的所述第二通孔的所述下导电体为终点,所述采样电阻片的所述第一取样脚和所述第二取样脚分别与所述电路板的所述第一通孔和所述第二通孔的所述上导电体相连接,所述正面走线和所述背面走线所包围的空间与所述采样电阻片的板面面积相匹配,从而使干扰磁场在以所述电路板走线所产生的感应电动势的方向与干扰磁场在采样电阻片所产生的感应电动势的方向相反且完全抵消干扰磁场的感应电动势,本发明在不增加硬件成本的基础上能够实现自动化装配,装配完成后无需再进行微调。(The invention discloses an electronic electric energy meter for resisting electromagnetic interference, which is characterized in that wiring is arranged, the upper electric conductor of a first through hole on the front surface of a circuit board is taken as a starting point, the lower electric conductor of a second through hole on the back surface of the circuit board is taken as an end point, a first sampling pin and a second sampling pin of a sampling resistance card are respectively connected with the upper electric conductor of the first through hole and the second through hole of the circuit board, the space surrounded by the front wiring and the back wiring is matched with the area of the plate surface of the sampling resistance card, so that the direction of induced electromotive force generated by the wiring of the circuit board and the direction of induced electromotive force generated by the sampling resistance card of an interference magnetic field are opposite, and the induced electromotive force of the interference magnetic field is completely counteracted, and the invention can realize automatic assembly on the basis of not increasing hardware cost, fine adjustment is not required after assembly is completed.)

1. An electronic electric energy meter for resisting electromagnetic interference, which is characterized in that,

the magnetic shunt comprises a shunt, a circuit board and a magnetic generating coil, wherein the circuit board is fixedly connected with the shunt and is positioned at the upper end of the shunt, the circuit board is provided with a plurality of through holes, the through holes are distributed on the surface of the circuit board side by side and are uniformly distributed on the left and right, and the magnetic generating coil is fixedly connected with the shunt, is fixedly connected with the circuit board, penetrates through the through holes and is also positioned on the surface of the circuit board;

the shunt comprises a first sampling pin, a second sampling pin and a sampling resistor disc, wherein the first sampling pin is fixedly connected with the circuit board, penetrates through the circuit board, is close to the via hole on the left side of the circuit board, and is also located at the end part of the via holes which are horizontally arranged;

the magnetism generating coil comprises a front wiring and a back wiring, the front wiring is fixedly connected with the circuit board, two ends of the front wiring extend into the two sides of the circuit board respectively, the two ends of the front wiring are located in the through holes, the number of the front wiring is multiple, the front wiring is arranged on the upper surface of the circuit board in parallel, one end of the first sampling pin is close to the first sampling pin, the back wiring is fixedly connected with the circuit board, the two ends of the back wiring are located in the two sides of the circuit board, the two ends of the back wiring are arranged in the through holes, the number of the back wiring is multiple, the two ends of the back wiring are arranged on the lower surface of the circuit board in parallel, and.

2. The electronic power meter for electromagnetic interference resistance according to claim 1,

the circuit board is provided with a first through hole and a second through hole, the first through hole is sleeved with the first sampling pin and is close to the via hole positioned on the left side of the circuit board, and the second through hole is sleeved with the second sampling pin and is close to the via hole positioned on the right side of the circuit board; the shunt also comprises an electric connector, the electric connector is fixedly connected with the circuit board, the number of the electric connector is two, the electric connector is respectively fixedly connected with the first sampling pin and the second sampling pin, and the electric connector is respectively positioned in the first through hole and the second through hole.

3. The electronic power meter for electromagnetic interference resistance according to claim 2,

the electric connector comprises an upper electric conductor and two lower electric conductors, the upper electric conductors are fixedly connected with the circuit board, are respectively and fixedly connected with the first sampling pin and the second sampling pin, are connected with the front routing on the left side of the circuit board, are also positioned on the upper surface of the circuit board and are respectively positioned in the first through hole and the second through hole; the lower conductor is fixedly connected with the circuit board, connected with the back wiring, positioned on the lower surface of the circuit board and positioned in the second through hole.

4. The electronic power meter for electromagnetic interference resistance according to claim 1,

the electronic electric energy meter for resisting electromagnetic interference further comprises a relay, wherein the relay is fixedly connected with the shunt and is positioned on one side of the circuit board far away from the shunt.

5. The electronic power meter for electromagnetic interference resistance according to claim 4,

the relay comprises a first leading-out end and a second leading-out end, the first leading-out end is fixedly connected with the sampling resistance chip and is positioned on one side, far away from the circuit board, of the sampling resistance chip; the second leading-out end is fixedly connected with the first leading-out end, is positioned on the surface of the first leading-out end and extends towards the direction far away from the first leading-out end.

6. The electronic power meter for electromagnetic interference resistance according to claim 5,

the electronic electric energy meter for resisting electromagnetic interference further comprises a shell and a cover plate, wherein the shell is fixedly connected with the circuit board, fixedly connected with the relay, arranged around the outer side of the circuit board and arranged around the outer side of the relay, and provided with an opening, and the opening is positioned on the upper surface of the shell and faces the circuit board; the cover plate is rotatably connected with the shell and covers the opening.

7. The electronic power meter for electromagnetic interference resistance according to claim 6,

the cover plate is provided with heat dissipation holes, and the heat dissipation holes penetrate through the cover plate and face the circuit board.

Technical Field

The invention relates to the technical field of electronic instruments, in particular to an electronic electric energy meter for resisting electromagnetic interference.

Background

The present electronic electric energy meter is an electronic instrument device, which samples the voltage and current supplied by the user in real time, adopts a special electric energy meter integrated circuit to process and multiply the sampled voltage and current signals into pulse output in direct proportion to the electric energy, and then displays the pulse output by a meter or a digital display. The electronic electric energy meter in the prior art usually adopts high-stability materials such as manganin to manufacture a current sampling element, namely a manganin splitter, but because of the interference of an external magnetic field, self-induction current flows through the manganin splitter, so that the current reading error of the electric energy meter occurs, and the electric energy meter measures the power consumption incorrectly under the condition of no load. In order to solve the interference of the magnetic field, one scheme of the prior art is to provide a through hole in the middle of the manganin splitter, weld two signal sampling lines on the upper and lower sampling pins of the manganin splitter respectively, and let one of the signal sampling lines pass through the through hole in the middle of the manganin splitter, and then connect to the circuit board of the electronic electric energy meter together with the other signal sampling line, so as to achieve a better magnetic field interference resistance effect and achieve an effect of resisting 0.5 mT.

Disclosure of Invention

The invention aims to provide an anti-electromagnetic interference electronic electric energy meter, and aims to solve the technical problem that the anti-interference electronic electric energy meter in the prior art can meet the national grid requirement only by fine adjustment when a product is subjected to meter installation test at a client due to the structural characteristic of a signal sampling line, and the signal sampling line is too soft and cannot be automatically assembled.

In order to achieve the purpose, the electronic electric energy meter for resisting electromagnetic interference comprises a shunt, a circuit board and a magneto coil, wherein the circuit board is fixedly connected with the shunt and is positioned at the upper end of the shunt, the circuit board is provided with a plurality of through holes, the through holes are distributed on the surface of the circuit board side by side and are uniformly distributed on the left and right, and the magneto coil is fixedly connected with the shunt, is fixedly connected with the circuit board, penetrates through the through holes and is also positioned on the surface of the circuit board; the shunt comprises a first sampling pin, a second sampling pin and a sampling resistor disc, wherein the first sampling pin is fixedly connected with the circuit board, penetrates through the circuit board, is close to the via hole on the left side of the circuit board, and is also located at the end part of the via holes which are horizontally arranged; the magnetism generating coil comprises a front wiring and a back wiring, the front wiring is fixedly connected with the circuit board, two ends of the front wiring extend into the two sides of the circuit board respectively, the two ends of the front wiring are located in the through holes, the number of the front wiring is multiple, the front wiring is arranged on the upper surface of the circuit board in parallel, one end of the first sampling pin is close to the first sampling pin, the back wiring is fixedly connected with the circuit board, the two ends of the back wiring are located in the two sides of the circuit board, the two ends of the back wiring are arranged in the through holes, the number of the back wiring is multiple, the two ends of the back wiring are arranged on the lower surface of the circuit board in parallel, and.

The circuit board is provided with a first through hole and a second through hole, the first through hole is sleeved with the first sampling pin and is close to the via hole on the left side of the circuit board, and the second through hole is sleeved with the second sampling pin and is close to the via hole on the right side of the circuit board; the shunt also comprises an electric connector, the electric connector is fixedly connected with the circuit board, the number of the electric connector is two, the electric connector is respectively fixedly connected with the first sampling pin and the second sampling pin, and the electric connector is respectively positioned in the first through hole and the second through hole.

The electric connector comprises an upper electric conductor and two lower electric conductors, wherein the upper electric conductors are fixedly connected with the circuit board, are respectively fixedly connected with the first sampling pin and the second sampling pin, are connected with the front routing wire on the left side of the circuit board, are also arranged on the upper surface of the circuit board and are respectively arranged in the first through hole and the second through hole; the lower conductor is fixedly connected with the circuit board, connected with the back wiring, positioned on the lower surface of the circuit board and positioned in the second through hole.

The electronic electric energy meter for resisting electromagnetic interference further comprises a relay, wherein the relay is fixedly connected with the shunt and is positioned on one side of the shunt, which is far away from the circuit board.

The relay comprises a first leading-out end and a second leading-out end, wherein the first leading-out end is fixedly connected with the sampling resistor disc and is positioned on one side, far away from the circuit board, of the sampling resistor disc; the second leading-out end is fixedly connected with the first leading-out end, is positioned on the surface of the first leading-out end and extends towards the direction far away from the first leading-out end.

The electronic electric energy meter for resisting electromagnetic interference further comprises a shell and a cover plate, wherein the shell is fixedly connected with the circuit board, fixedly connected with the relay, arranged around the outer side of the circuit board and arranged around the outer side of the relay, and provided with an opening, and the opening is positioned on the upper surface of the shell and faces the circuit board; the cover plate is rotatably connected with the shell and covers the opening.

The cover plate is provided with heat dissipation holes, and the heat dissipation holes penetrate through the cover plate and face the circuit board.

The invention relates to an electronic electric energy meter for resisting electromagnetic interference, which is characterized in that routing takes the upper conductor of the first through hole on the front surface of a circuit board as a starting point and takes the lower conductor of the second through hole on the back surface of the circuit board as an end point, the first sampling pin and the second sampling pin of a sampling resistance chip are respectively connected with the upper conductors of the first through hole and the second through hole of the circuit board, the space surrounded by the front routing and the back routing is matched with the area of the plate surface of the sampling resistance chip, so that an interference magnetic field is opposite to the direction of the induced electromotive force generated by the interference magnetic field on the sampling resistance chip in the direction of the induced electromotive force generated by the circuit board routing and the direction of the induced electromotive force generated by the interference magnetic field on the sampling resistance chip, and the induced electromotive force of the interference magnetic field is completely counteracted, and the invention can realize automatic assembly on the basis of not, fine adjustment is not required after assembly is completed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of the internal structure of the electric energy meter of the present invention.

Fig. 2 is an exploded view of the shunt and circuit board of the present invention.

Figure 3 is a schematic diagram of the connection of the shunt and the circuit board of the present invention.

Fig. 4 is a routing diagram on a circuit board of the present invention.

Fig. 5 is a schematic view of the surface structure of the housing of the present invention.

In the figure: 1-shunt, 2-circuit board, 3-magnetic generating coil, 4-relay, 5-shell, 6-cover plate, 11-first sampling pin, 12-second sampling pin, 13-sampling resistance sheet, 14-electric connector, 21-via hole, 22-first through hole, 23-second through hole, 31-front wiring, 32-back wiring, 41-first leading-out terminal, 42-second leading-out terminal, 51-opening, 61-heat dissipation hole, 100-electronic electric energy meter for anti-electromagnetic interference, 141-upper conductor and 142-lower conductor.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.