Intelligent electric energy meter electric variable monitoring electric terminal and electricity larceny prevention method thereof

Abstract

The invention discloses an intelligent electric energy meter electrical variable monitoring electric terminal and an electricity larceny prevention method thereof, and relates to the field of electrical variable monitoring device.The intelligent electric energy meter electrical variable monitoring electric terminal comprises a terminal body, one end of the terminal body is provided with a blind hole used for installing a wire in the radial direction, and the terminal body is provided with an installation hole not parallel to the blind hole; the terminal body is provided with a mounting groove opposite to the mounting hole, and the mounting groove and the mounting hole are communicated with the blind hole. The induction assembly comprises a coil wound on the peripheral side of the terminal body, and the coil is used for being connected with an electric energy meter PCB and generating induction current. The piezoelectric assembly is mounted in the mounting groove, and the power line is pressed on the piezoelectric assembly through a bolt to generate an electric signal so as to judge whether the power line is stably mounted or not. The beneficial effects of the invention are that the meter internal electricity larceny prevention function and the meter external electricity larceny prevention function can be monitored at the same time, faults are not liable to occur, and the cost can be effectively controlled; the design of the induction assembly and the piezoelectric assembly has better concealment.

Description

Technical Field

[0001] The present invention relates to the field of electric variable monitoring devices, in particular to an electric variable monitoring terminal of an intelligent electric energy meter and an anti-electricity theft method thereof. Background Art

[0002] Existing anti-electricity theft technologies can be mainly divided into two types: off-meter anti-electricity theft and inside-meter anti-electricity theft.

[0003] Off-meter electricity theft prevention is mainly achieved by utilizing various uniquely designed anti-destruction structural components, and powerful security devices are used to protect the electricity meter. However, the overall structure is generally large in size and weight (relative to the electricity meter), which is not only costly and difficult to install, but also occupies a large installation space. In addition, existing anti-electricity theft measures lack the function of active reporting. Even if the electricity meter is already connected to the Internet and can report conveniently, large-scale manpower inspections are still required to discover problems.

[0004] The in-meter anti-theft technology is mainly implemented by measuring the difference between the neutral current and the live current. When the live current value measured by the electricity meter is significantly different from the neutral current value, the electricity theft event can be sensed and recorded. However, it cannot identify off-meter electricity theft. Secondly, because the transformer is easily affected by magnetic field changes, a certain margin is usually left for the difference between the neutral current and the live current to avoid misjudgment of electricity theft events due to external magnetic field interference. Therefore, the sensitivity of the existing in-meter anti-theft technology to electricity theft detection is correspondingly affected. Finally, this existing in-meter anti-theft technology can still circumvent the disadvantage of off-meter short circuits that can be discovered at a glance during inspections by short-circuiting the electricity meter, making it impossible to directly identify whether electricity theft has occurred. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is that the mechanism of using existing electrical terminals for monitoring electrical variables is not only complex in structure but also has low structural sensitivity.

[0006] The above technical problems are solved by the following technical solution: The present invention proposes an electrical terminal for monitoring electric variables of an intelligent electricity meter, which includes a terminal body, one end of the terminal body is radially provided with a blind hole for installing wiring, the terminal body is provided with a mounting hole that is not parallel to the blind hole, the terminal body is provided with a mounting groove placed opposite to the mounting hole, and the mounting groove and the mounting hole are both connected to the blind hole.

[0007] The induction component includes a coil wound around the outer periphery of the terminal body, and the coil is used to be connected to the PCB board of the electric energy meter and generate an induced current.

[0008] The piezoelectric component is installed in the installation groove. The power line is pressed against the piezoelectric component by a bolt to generate an electrical signal to determine whether the power line is stably installed.

[0009] In a preferred embodiment of the electric variable monitoring terminal of the smart electricity meter of the present invention: the piezoelectric component includes a piezoelectric part arranged in the installation groove, and the piezoelectric part is used to convert the pressure of the power line and the bolt pressing on the piezoelectric part into an electrical signal.

[0010] In a preferred embodiment of the electric terminal for monitoring electric variables of a smart electric energy meter according to the present invention, the piezoelectric portion includes a piezoelectric ceramic and a high-voltage insulating ceramic connected to the piezoelectric ceramic.

[0011] In a preferred embodiment of the electric terminal for monitoring electric variables of a smart electric energy meter according to the present invention: the piezoelectric component further comprises a conductive portion arranged on one end face of the piezoelectric portion, and the conductive portion passes through the terminal body and is used to connect to the PCB board of the electric energy meter; the terminal body further comprises a through hole connected to the blind hole, and the conductive portion cooperates with the through hole and passes through the through hole.

[0012] In a preferred embodiment of the electric terminal for monitoring electric variables of a smart electric energy meter according to the present invention, the conducting portion includes a feeler and a ceramic protective sleeve wrapped around the outside of the feeler.

[0013] In a preferred embodiment of the electric variable monitoring electric terminal of the smart electricity meter of the present invention: the sensing component also includes a plurality of protection blocks slidably arranged on the terminal body, and the plurality of protection blocks are circumferentially distributed on the outer peripheral side of the terminal body; the outer peripheral side of the terminal body is provided with an annular groove slidably connected to the plurality of protection blocks.

[0014] In a preferred embodiment of the electric terminal for monitoring electric variables of a smart electric energy meter according to the present invention, adjacent protection blocks are provided with outer peripheral sides thereof with clearance grooves for facilitating the passage and winding of the coil.

[0015] The beneficial effects of the electric terminal for monitoring electric variables of the intelligent electric energy meter of the present invention are as follows: by comparing the measured current with the two existing values ​​in the electricity theft comparison, the identification of electricity theft in the meter is made more sensitive; by using the relatively arranged mounting holes and mounting slots, the bolts can be used to press the power line against the piezoelectric component to generate an electrical signal, and the presence or absence of the electrical signal can be used to determine whether the power line is stably connected. When the terminal body is in normal use, the anti-electricity theft function inside the meter and the anti-electricity theft function outside the meter can be monitored simultaneously, especially effectively identifying the electricity theft behavior of zero households, with a simple structure and less prone to malfunction; at the same time, compared with traditional anti-electricity theft technology, the design of the induction component and the piezoelectric component in the present invention has better concealment, which greatly improves the safety of anti-electricity theft; and the induction component and the piezoelectric component have a simple structure, are easy to manufacture, and can also effectively control costs.

[0016] Another object of the present invention is to provide an anti-electricity theft method for an electric terminal for monitoring electric variables of an intelligent electric energy meter, which aims to solve the problem that the existing electric terminal electric variable monitoring structure is complex and the monitoring is insensitive.

[0017] To solve the above technical problems, the present invention also provides the following technical solutions: a method for preventing electricity theft at the electric variable monitoring terminal of a smart electricity meter; specifically, it includes an anti-electricity theft method inside the meter and an anti-electricity theft method outside the meter.

[0018] As a preferred embodiment of the cutting fixture of the present invention, the method for preventing electricity theft in a meter comprises the following steps: S1: Connect the sensing component to the PCB of the smart energy meter and turn on the meter for use; S2: When the energy meter is in normal working condition, the terminal body is energized, and the current induced in the coil wrapped around the terminal body is positively correlated with the current in the terminal body; S3: Compare the current value induced in the coil with the live wire current value measured in the electric energy meter itself; at the same time, compare the live wire current value measured in the electric energy meter itself with the neutral wire current value measured in the electric energy meter itself. If the error values ​​of the two comparisons are both greater than 20%, it is determined to be electricity theft.

[0019] As a preferred embodiment of the cutting fixture of the present invention, the off-meter anti-electricity theft method comprises the following steps: S1: Install the piezoelectric part in the mounting slot, tighten the pressure line to the piezoelectric component with bolts, and connect it to the electric energy meter for normal use; S2: When the energy meter is normally powered on, the voltage signal generated by the piezoelectric part will be continuously output, and the user can monitor the value of the electrical signal output by the piezoelectric part; S3: If the output voltage signal is large, the power line connection is normal; if the output voltage signal is small, the power line connection is not firm; if there is no output voltage signal, the power line is loose or detached, and the staff is reminded to reconnect the power line; S4: Compare the voltage data obtained from monitoring with the historical electricity consumption data. After excluding the impact of seasonal factors on electricity consumption, compare the electricity consumption in adjacent time periods on a weekly or monthly basis. When the comparison results show a small difference, an early warning is triggered; if the difference is significant, the warning is upgraded to a suspected electricity theft incident and reported for processing.

[0020] The beneficial effects of the present invention are: accurate detection of the electric energy meter is achieved by preventing electricity theft inside the meter and preventing electricity theft outside the meter, and the structure is simple and the device has good concealment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. Obviously, the drawings described below only relate to some embodiments of the present invention, and are not intended to limit the present invention.

[0022] Figure 1 The figure shows the overall structure of the electric terminal for monitoring electric variables of an intelligent electric energy meter according to the present invention; Figure 2 The structure of the terminal body in the electric variable monitoring terminal of an intelligent electric energy meter of the present invention is shown. Figure 1 ; Figure 3 The structure of the terminal body in the electric variable monitoring terminal of an intelligent electric energy meter of the present invention is shown. Figure 2 ; Figure 4 The present invention shows a schematic structural diagram of a piezoelectric component in an electric variable monitoring terminal of an intelligent electric energy meter.

[0023] In the figure: 1. Terminal body; 11. Blind hole; 12. Mounting hole; 13. Mounting groove; 14. Through hole; 15. Ring groove; 2. Induction component; 21. Coil; 22. Protective block; 3. Piezoelectric component; 31. Piezoelectric part; 311. Piezoelectric ceramic; 312. High-voltage insulating ceramic; 32. Conducting part; 321. Antenna; 322. Ceramic protective cover. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0025] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0026] Reference Figure 1 This embodiment provides an electric terminal for monitoring electric variables of a smart electric energy meter, including a terminal body 1, an induction component 2, and a piezoelectric component 3.

[0027] Specifically, a blind hole 11 for installing wiring is provided radially at one end of the terminal body 1, a mounting hole 12 which is not parallel to the blind hole 11 is provided on the terminal body 1, and a mounting groove 13 which is placed opposite to the mounting hole 12 is provided on the terminal body 1, and the mounting groove 13 and the mounting hole 12 are both connected to the blind hole 11; installing the power line on the terminal body 1 for power connection measurement belongs to the existing technology, that is, the power line is fitted into the blind hole 11, the bolt is passed through the mounting hole 12 and the power line is pressed toward the mounting groove 13, thereby realizing the installation of the power line on the terminal body 1.

[0028] The induction component 2 includes a coil 21 wound around the outer peripheral side of the terminal body 1, and the coil 21 is used to connect to the PCB board of the electricity meter and generate an induced current; when the electricity meter is in normal operation, the terminal body 1 operates normally, which can generate an induced current inside the coil 21. By introducing the induced current into the connected electricity meter PCB, the current value induced in the coil 21 is compared with the live wire current value measured in the electricity meter itself; at the same time, the live wire current value measured in the electricity meter itself is compared with the neutral wire current value measured in the electricity meter itself. When the error values ​​of the two comparisons are both greater than 20%, it is judged as electricity theft. The existing two-value comparison method is to compare the live current value measured by the manganese copper meter of the electric energy meter with the neutral current value measured by the voltage transformer included in the electric energy meter. When the live current value and the neutral current value measured by the electric energy meter are significantly different, the electricity theft event can be detected and recorded. The present invention compares the induced current value generated in the coil 21 measured by the electric energy meter with the live current value and the neutral current value measured by the electric energy meter, and then makes a judgment. The judgment method is as follows: The live current value in the metering coil 21 of the energy meter is X, the neutral current value collected by the current transformer is Y, and the live current value collected by the manganese copper is Z. X, Y, and Z are corresponding values ​​converted to the same unit A.

[0029] The conditions for judging electricity theft events through three-value comparison are: If |XZ|>N1 and |YZ|>N1, it is determined that the live wire in the meter is short-circuited and electricity is being stolen.

[0030] ||XZ|-|YZ||>N2, it is judged as a power theft event with the live and neutral wires short-circuited at the same time.

[0031] Electricity theft caused by short-circuiting the live wire inside the meter: The thief steals electricity by bridging the live wire input and output lines of the energy meter, causing the energy meter to be short-circuited. Traditional energy meters set the manganese copper resistor sampling at the connection point between the electrical terminal and the wire inside the energy meter, and the short-circuiting point for short-circuiting the live wire of the energy meter is located between the manganese copper resistor sampling and the electrical terminal. Therefore, when the live wire of the energy meter is short-circuited, the manganese copper resistor sampling and other components of the energy meter are short-circuited, and the short-circuiting line diverts most of the current. The live wire current Z collected by the manganese copper resistor sampling is very small. At the same time, since the short-circuiting point is located between the electrical terminal and the manganese copper resistor sampling, when the live wire of the energy meter is short-circuited, the electrical terminal is connected to the circuit and current flows. Therefore, at this point, there is current flowing through the meter coil 21. The live current value X in the meter coil 21 and the live current Z sampled by the manganese copper resistor are far lower than the actual value in use. Meanwhile, the neutral current Y is sampled by current transformers at the meter's neutral input and output. Under normal power usage, the live current Z sampled by the manganese copper resistor should be consistent with the neutral current value Y. The live current value X in the meter coil 21 is compared with the live current Z sampled by the manganese copper resistor. If the difference is greater than 20% of the actual measured value, and the deviation between the live current Z sampled by the manganese copper resistor and the neutral current value Y is also greater than 20% of the actual measured value, it is determined to be electricity theft. Based on the principle of greater than 20%, 20% of the actual measured value, i.e., the live current value X in the meter coil 21, is taken as the value of N1.

[0032] Electricity theft caused by simultaneous shorting of the live and neutral wires: When the live and neutral wires are simultaneously shorted (i.e., the live and neutral wires are shorted together using a conductor), the current transformer is shorted and inoperative, and the measured neutral current Y is significantly lower than the actual current. In this case, the difference between the live current value X in the meter coil 21 and the live current Z recorded by the manganese copper sensor, as well as the difference between the neutral current Y and the live current Z recorded by the manganese copper sensor, is compared. If the difference between these two sets of differences is greater than 20%, it is determined that an electricity theft event has occurred due to a simultaneous shorting of the live and neutral wires within the meter. Based on the principle of being greater than 20%, the value of N2 is 20% of the actual measured value, i.e., the live current value X in the meter coil 21.

[0033] The quality of the meter's wiring can also be determined: in actual use, poor wiring can cause abnormal heating at the contact points, leading to excessive heat and fires, or abnormal line loss. The anti-theft terminal proposed in this invention can detect the pressure value of the meter's piezoelectric portion 31. If the pressure value is insufficient, it can be determined that the meter's power line wiring is abnormal.

[0034] The piezoelectric assembly 3 is installed in the mounting slot 13. Bolts are used to press the power line against the piezoelectric assembly 3, generating an electrical signal to determine whether the power line is securely installed. The opposing mounting holes 12 and mounting slots 13 enable the bolts to press the power line against the piezoelectric assembly 3, generating an electrical signal. The presence or absence of the electrical signal determines whether the power line is securely connected. The absence of the electrical signal indicates that the power line is not securely installed or is loose. A stable electrical signal indicates that the power line is securely connected and does not require reinstallation or adjustment.

[0035] As an optional embodiment, the piezoelectric assembly 3 includes a piezoelectric portion 31 disposed within the mounting slot 13. The piezoelectric portion 31 is configured to convert the pressure exerted by the power line and bolts on the piezoelectric portion 31 into an electrical signal. The piezoelectric portion 31 can be any device capable of converting pressure into an electrical signal, such as a pressure sensor or a piezoelectric ceramic plate.

[0036] like Figure 4 As shown, the piezoelectric part 31 includes a piezoelectric ceramic 311 and a high-voltage insulating ceramic 312 connected to the piezoelectric ceramic 311. The piezoelectric ceramic 311 and the high-voltage insulating ceramic 312 are directly processed together or bonded together; the piezoelectric part 31 transmits signals to the outside for monitoring of electrical signals.

[0037] like Figure 4 As shown, the piezoelectric assembly 3 also includes a conductive portion 32 disposed on one end face of the piezoelectric portion 31. The conductive portion 32 passes through the terminal body 1 and is used to connect to the PCB of the energy meter. The terminal body 1 also includes a through hole 14 that communicates with the blind hole 11. The conductive portion 32 cooperates with the through hole 14 and passes through the through hole 14. The through hole 14 and the blind hole 11 are disposed on opposite sides of the terminal body 1. The conductive portion 32 can be used to directly transmit the electrical signal generated by the piezoelectric portion 31 to the energy meter for real-time monitoring of the electrical signal.

[0038] Furthermore, the conductive portion 32 includes a feeler 321 and a ceramic protective sleeve 322 wrapped around the feeler 321. The ceramic protective sleeve 322 is wrapped around the feeler 321 to enhance the rigidity of the feeler 321, thereby preventing the conductive portion 32 from deforming and allowing it to pass through the through hole 14 smoothly.

[0039] like Figure 1 - Figure 3As shown, the sensing component 2 also includes a plurality of protective blocks 22 slidably arranged on the terminal body 1, and the plurality of protective blocks 22 are circumferentially distributed on the outer peripheral side of the terminal body 1; the outer peripheral side of the terminal body 1 is provided with an annular groove 15 slidably connected to the plurality of protective blocks 22. Multiple protection blocks 22 are slidably set on the terminal body 1. When the coil 21 is wound, the protection blocks 22 can be slid to squeeze the coil 21. When external parts press, the coil 21 can be protected by the support of multiple protection blocks 22; the distance between adjacent protection blocks 22 along the axial direction of the terminal body 1 is less than half the length of the ring groove 15. When external force presses the wound coil 21, the external force acts directly on the protection block 22, and the protection block 22 bears the external force to protect the coil 21. The smaller the distance between adjacent protection blocks 22, the more protection blocks 22 can be set, and the more support points that can bear the external force, the better the protection effect of the coil 21; the packaging material of the coil 21 itself is selected to have a high voltage protection grade, and the coil 21 is wound in the ring groove 15. The height difference between the ring groove 15 and the outer peripheral surface of the terminal body 1 can also achieve pressure protection for the coil 21.

[0040] like Figure 2 As shown, adjacent protection blocks 22 are provided with clearance grooves on their outer circumferences for the coil 21 to pass through and be wound. By providing the clearance grooves, a height difference is formed between the outer circumference of the protection block 22 and the coil 21, further protecting the coil 21.

[0041] In summary, the induction component 2 and the piezoelectric component 3 are both installed on the terminal body 1, and the terminal body 1 is connected to the electric energy meter for normal use. An induced current is generated inside the coil 21. By introducing the induced current into the connected electric energy meter PCB, the current of the measuring coil 21 is compared with the two values ​​in the existing two-value comparison of electricity theft, thereby making the identification of electricity theft in the meter more sensitive; through the relatively arranged mounting holes 12 and mounting slots 13, the bolts can be used to press the power line onto the piezoelectric component 3 to generate an electrical signal, and the presence or absence of the electrical signal is used to determine whether the power line is stably connected. When there is no electrical signal, the power line is not firmly installed or is loose; when the electrical signal is stably present, the power line is stably connected and does not need to be reinstalled or adjusted. When the terminal body 1 is in normal use, the anti-electricity theft function inside the meter and the anti-electricity theft function outside the meter can be monitored at the same time, especially the electricity theft behavior of zero households can be effectively identified. The structure is simple and not prone to malfunction. At the same time, compared with traditional anti-electricity theft technology, the design of the sensing component 2 and the piezoelectric component 3 in the present invention has better concealment, and the safety of the anti-electricity theft function is greatly improved. The sensing component 2 and the piezoelectric component 3 have a simple structure, are easy to manufacture, and can also effectively control costs.

[0042] Furthermore, based on the above-mentioned smart energy meter electric variable monitoring terminal, this embodiment provides an anti-electricity theft method for the smart energy meter electric variable monitoring terminal, including an in-meter anti-electricity theft method and an out-meter anti-electricity theft method.

[0043] As an optional embodiment, the method for preventing electricity theft in a meter includes the following steps: S1: Connect the sensor component 2 to the PCB of the smart energy meter and turn on the energy meter for use; S2: When the electric energy meter is in normal working state, the terminal body 1 is energized, and the current induced in the coil 21 wound around the outside of the terminal body 1 is positively correlated with the current in the terminal body 1; S3: Compare the current value induced in the coil 21 with the live current value measured in the electric energy meter; at the same time, compare the live current value measured in the electric energy meter with the neutral current value measured in the electric energy meter. If the error values ​​of the two comparisons are both greater than 20%, it is determined to be electricity theft.

[0044] As an optional embodiment, the off-meter electricity theft prevention method includes the following steps: S1: Install the piezoelectric part 31 in the installation groove 13, and tighten the pressure line on the piezoelectric component 3 with bolts, and connect the electric energy meter for normal use; S2: When the energy meter is normally powered on, the voltage signal generated by the piezoelectric part 31 is continuously output, and the user can monitor the value of the electrical signal output by the piezoelectric part 31; S3: If the output voltage signal is large, the power line connection is normal; if the output voltage signal is small, the power line connection is not firm; if there is no output voltage signal, the power line is loose or detached, and the staff is reminded to reconnect the power line; S4: Compare the voltage data obtained from monitoring with the historical electricity consumption data. After excluding the impact of seasonal factors on electricity consumption, compare the electricity consumption in adjacent time periods on a weekly or monthly basis. When the comparison results show a small difference, an early warning is triggered; if the difference is significant, the warning is upgraded to a suspected electricity theft incident and reported for processing.

[0045] Finally, it should be pointed out that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. An electric terminal for monitoring electric variables of a smart electric energy meter, characterized by: include, A terminal body (1), wherein one end of the terminal body (1) is provided with a blind hole (11) for installing wiring in a radial direction, the terminal body (1) is provided with a mounting hole (12) that is not parallel to the blind hole (11), the terminal body (1) is provided with a mounting groove (13) that is positioned opposite to the mounting hole (12), and the mounting groove (13) and the mounting hole (12) are both connected to the blind hole (11); An induction component (2), the induction component (2) comprising a coil (21) wound around the outer periphery of the terminal body (1), the coil (21) being used to connect to a PCB board of an electric energy meter and generate an induced current; and A piezoelectric component (3) is installed in the installation groove (13), and the power line is pressed against the piezoelectric component (3) by a bolt to generate an electric signal to determine whether the power line is stably installed.

2. The electric terminal for monitoring electric variables of a smart electric energy meter according to claim 1, characterized in that: The piezoelectric component (3) comprises a piezoelectric portion (31) disposed in the mounting groove (13), and the piezoelectric portion (31) is used to convert the pressure exerted by the power line and the bolt on the piezoelectric portion (31) into an electrical signal.

3. The electric terminal for monitoring electric variables of a smart electric energy meter according to claim 2, characterized in that: The piezoelectric part (31) includes a piezoelectric ceramic (311) and a high-voltage insulating ceramic (312) connected to the piezoelectric ceramic (311).

4. The electric terminal for monitoring electric variables of a smart electric energy meter according to claim 3, characterized in that: The piezoelectric component (3) further includes a conductive portion (32) provided on one end face of the piezoelectric portion (31), and the conductive portion (32) passes through the terminal body (1) and is used to connect to the PCB board of the electric energy meter; the terminal body (1) further includes a through hole (14) communicating with the blind hole (11), and the conductive portion (32) cooperates with the through hole (14) and passes through the through hole (14).

5. The electric terminal for monitoring electric variables of a smart electric energy meter according to claim 4, characterized in that: The conducting portion (32) comprises a feeler (321) and a ceramic protective sleeve (322) wrapped around the outside of the feeler (321).

6. The electric terminal for monitoring electric variables of a smart electric energy meter according to claim 5, characterized in that: The induction component (2) further comprises a plurality of protective blocks (22) slidably arranged on the terminal body (1), wherein the plurality of protective blocks (22) are circumferentially distributed on the outer peripheral side of the terminal body (1); and an annular groove (15) slidably connected to the plurality of protective blocks (22) is provided on the outer peripheral side of the terminal body (1).

7. The electric terminal for monitoring electric variables of a smart electric energy meter according to claim 6, characterized in that: The outer peripheral side of the adjacent protection block (22) is provided with a clearance groove for facilitating the coil (21) to pass through and be wound.

8. A method for preventing electricity theft at an electric terminal of an intelligent electric energy meter with electric variable monitoring, characterized in that: Adopting an electric variable monitoring terminal of a smart electric energy meter as described in any one of claims 1 to 7; It includes methods to prevent electricity theft inside the meter and methods to prevent electricity theft outside the meter.

9. The anti-electricity theft method for an electric terminal of an intelligent electric energy meter with electric variable monitoring according to claim 8, characterized in that: The method for preventing electricity theft in a meter includes the following steps: S1: Connect the sensing component (2) to the PCB of the smart energy meter and turn on the energy meter for use; S2: When the electric energy meter is in a normal working state, the terminal body (1) is energized, and the current induced in the coil (21) wound around the outside of the terminal body (1) is positively correlated with the current in the terminal body (1); S3: Compare the current value induced in the coil (21) with the live wire current value measured in the electric energy meter itself; at the same time, compare the live wire current value measured in the electric energy meter itself with the neutral wire current value measured in the electric energy meter itself. When the error values ​​of the two comparisons are both greater than 20%, it is determined to be electricity theft.

10. The anti-electricity theft method for an electric variable monitoring terminal of an intelligent electric energy meter according to claim 9, characterized in that: The off-meter electricity theft prevention method comprises the following steps: S1: The piezoelectric part (31) is mounted in the mounting groove (13), and the pressure line is pressed onto the piezoelectric component (3) by means of bolts, and the electric energy meter is connected for normal use; S2: During normal power-on of the electric energy meter, the voltage signal generated by the piezoelectric portion (31) is continuously output, and the user can monitor the value of the electric signal output by the piezoelectric portion (31); S3: If the output voltage signal is large, the power line connection is normal; if the output voltage signal is small, the power line connection is not firm; if there is no output voltage signal, the power line is loose or detached, and the staff is reminded to reconnect the power line; S4: Compare the voltage data obtained from monitoring with the historical electricity consumption data. After excluding the impact of seasonal factors on electricity consumption, compare the electricity consumption in adjacent time periods on a weekly or monthly basis. When the comparison results show a small difference, an early warning is triggered; if the difference is significant, the warning is upgraded to a suspected electricity theft incident and reported for processing.

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