Electricity consumption information sampling structure and electric energy meter

Abstract

The utility model discloses an electricity consumption information sampling structure and an electric energy meter, and relates to the technical field of electric energy meters, in particular to the electricity consumption information sampling structure comprises a sampling strip, a sampling area is integrally formed in the middle of the sampling strip, and the resistivity of part of the sampling area is larger than that of other areas of the sampling strip; at least two groups of electric connection points are arranged between the power frequency compensation device and the sampling strip, and the sampling strip between the two groups of electric connection points at least comprises the sampling area with partial length and is used for compensating signals collected from the sampling strip; the measuring and calculating device is electrically connected with the power frequency compensation device and is used for calculating and analyzing signals transmitted by the power frequency compensation device; the electricity utilization information sampling structure, namely the electric energy meter, adopts direct contact type measurement, the measurement precision is improved, a power frequency compensation device is integrated, the sampling precision is further improved, and the interference resistance of a power frequency magnetic field is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy meters, and more specifically, to an electric energy meter comprising the ... Background Art

[0002] In the existing technology, electric energy meters can collect circuit information, such as voltage and current information, mostly by using mutual inductors. Since the circuit information collection by mutual inductors is non-contact induction, its measurement accuracy is low and its anti-electromagnetic interference ability is poor.

[0003] The installation environment of the energy meter often involves outdoor installation, which is often accompanied by strong magnetic field interference, causing the measurement results of the transformer to deviate.

[0004] At the same time, a mutual inductor is used to collect information within the circuit. However, due to its own structural limitations, the mutual inductor occupies a large space, which in turn increases the volume of the electric energy meter and is not conducive to the miniaturization of the electric energy meter.

[0005] In summary, how to provide an electricity consumption information sampling structure and an electric energy meter that can solve the problems of large space occupation, low measurement accuracy and poor anti-electromagnetic interference performance of circuit information acquisition equipment is an urgent problem to be solved by technical personnel in this field. Utility Model Content

[0006] In view of this, the purpose of the present invention is to provide an electricity information sampling structure that adopts direct contact measurement to improve measurement accuracy, and integrates an industrial frequency compensation device to further improve sampling accuracy and increase the ability to resist interference from industrial frequency magnetic fields.

[0007] Another object of the present utility model is to provide an electric energy meter including the above-mentioned electric energy information sampling structure, which has the same technical features and can achieve the same effects.

[0008] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0009] A power consumption information sampling structure, comprising:

[0010] The sampling strip has a sampling area integrally formed in the middle, wherein the resistivity of the sampling area is greater than that of other areas of the sampling strip;

[0011] A power frequency compensation device having at least two sets of electrical connection points with the sampling strip, wherein the sampling strip between the two sets of electrical connection points includes at least a portion of the length of the sampling area, and is used to compensate for the signal collected from the sampling strip;

[0012] The measuring and calculating device is electrically connected to the power frequency compensation device and is used for calculating and analyzing the signal transmitted by the power frequency compensation device.

[0013] Preferably, the sampling area is made of manganese copper and is integrally welded with other areas of the sampling strip.

[0014] Preferably, the sampling strip is provided with at least two sets of bending legs, and the bending legs are integrally formed with the sampling strip;

[0015] The circuit board of the power frequency compensation device is provided with an assembly hole for assembling the bending leg.

[0016] Preferably, the sampling strip between the two sets of bending legs includes at least a portion of the length of the sampling area;

[0017] The assembly hole is provided with a conductor for electrically connecting the bent leg and the power frequency compensation device.

[0018] Preferably, the sampling strip is a Z-shaped structure, and the middle section of the sampling strip is perpendicular to the two end sections, and the bending foot is provided in the middle section of the sampling strip;

[0019] The circuit board of the power frequency compensation device is parallel to the middle section of the sampling strip.

[0020] Preferably, a sampling line for connection is provided between the power frequency compensation device and the measurement and calculation device, and the sampling line is a twisted pair.

[0021] An electric energy meter comprises any one of the above-mentioned electricity consumption information sampling structures.

[0022] Preferably, the sampling strip is an incoming line crimping strip or an outgoing line crimping strip of the live wire path in the electric energy meter.

[0023] Preferably, a circuit breaker is integrated in the electric energy meter, and the sampling strip is an incoming line crimping strip or an outgoing line crimping strip of the live wire path in the circuit breaker.

[0024] Compared with the prior art, the power consumption information sampling structure provided by the present invention has at least the following beneficial effects:

[0025] 1. By setting sampling areas with different resistivity in the sampling strip, a potential difference is generated at both ends of the sampling area. Combined with the resistance between the two sampling points, the current in the circuit can be calculated. Based on the current fluctuation, the stability of the circuit can be measured. The use of direct contact for detection helps to improve detection accuracy.

[0026] 2. When selecting the sampling strip, you can choose to replace the existing circuit line in the equipment, without adding too much extra equipment, so the overall space occupied is small, which helps to realize the miniaturization design of the electric energy meter;

[0027] 3. By adding a power frequency compensation device, the collected signal can be compensated for the power frequency, which helps to increase the ability to resist the interference of the power frequency magnetic field. Using the power frequency compensation device as a signal transfer medium is conducive to improving the accuracy of signal sampling.

[0028] The electric energy meter provided by the utility model includes the above-mentioned electricity consumption information sampling structure and has the same beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0030] Figure 1 This is a schematic diagram of the structure of the specific power consumption information sampling structure provided by the utility model;

[0031] Figure 2 This is a schematic structural diagram of a specific sampling strip provided by the present utility model;

[0032] Figure 3 This is a schematic diagram of the structure of the specific sampling bar and power frequency compensation device provided by the utility model;

[0033] Figure 4 This is a structural diagram of the specific electricity consumption information sampling structure provided by the utility model assembled in an electric energy meter.

[0034] Figures 1-4 middle:

[0035] 1. Sampling strip; 101. Sampling area; 102. Bending foot; 2. Power frequency compensation device; 201. Assembly hole; 3. Sampling line; 4. Measurement and calculation device. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] The core of this utility model is to provide an electricity consumption information sampling structure, which adopts direct contact measurement to improve measurement accuracy, and integrates an industrial frequency compensation device to further improve sampling accuracy and increase the ability to resist interference from industrial frequency magnetic fields.

[0038] Another core of the present invention is to provide an electric energy meter including the above-mentioned electricity consumption information sampling structure, which has the same technical features and can achieve the same effect.

[0039] Please refer to Figure 1-Figure 3 , a power consumption information sampling structure, comprising:

[0040] The sampling strip 1 has a sampling area 101 integrally formed in the middle, and the resistivity of the sampling area 101 is greater than that of other areas of the sampling strip 1;

[0041] The power frequency compensation device 2 has at least two sets of electrical connection points with the sampling bar 1, and the sampling bar 1 between the two sets of electrical connection points includes at least a partial length of the sampling area 101 for compensating the signal collected from the sampling bar 1;

[0042] The measurement and calculation device 4 is electrically connected to the power frequency compensation device 2 and is used to calculate and analyze the signal transmitted by the power frequency compensation device 2.

[0043] like Figure 2 As shown, a sampling area 101 is provided in the sampling bar 1, and the resistivity of the sampling area 101 is greater than the point resistance of other parts of the sampling bar 1. When current passes through the sampling bar 1, a potential difference will appear at both ends of the sampling area 101. Two groups of sampling points are selected along the current transmission direction in the sampling bar 1 for potential sampling. The real-time current value in the sampling bar 1 can be calculated based on the resistance of the sampling bar 1 between the two sampling points and the potential difference between the two sampling points. That is, the current value of the circuit is measured by direct contact, which effectively improves the measurement accuracy.

[0044] At the same time, if Figure 3 As shown, the integrated power frequency compensation device 2 performs power frequency compensation on the sampled signal, thereby increasing the ability to resist interference from the power frequency magnetic field, so that the electrical information sampling structure can be applied to working conditions with strong magnetic field interference, such as outdoors. At the same time, the power frequency compensation device 2 is used as a transfer medium for the collected signal, which also helps to improve the sampling accuracy.

[0045] In practical applications, the sampling strip 1 can be used to replace an existing conductive module in the live wire path of the device under test, without taking up additional space in the device under test, thereby facilitating a miniaturized design of the device under test.

[0046] In some embodiments, the sampling region 101 is made of manganese copper and is integrally welded with other regions of the sampling strip 1 ;

[0047] like Figure 2 As shown, the sampling area 101 of the sampling bar 1 is formed by integral welding, so that the sampling area 101 and the sampling bar 1 have good electrical contact as a whole, which helps to reduce the resistance at the connection position, thereby reducing the heat generation of the sampling bar 1 and reducing the resistance temperature coefficient requirements of the material of the sampling area 101;

[0048] In this embodiment, manganese copper is used as the material of the sampling area 101. Its resistance temperature coefficient is small. That is, when the sampling strip 1 generates more heat after a long period of current transmission, the resistance value of manganese copper changes less, which is conducive to ensuring the accuracy of the sampling results.

[0049] In some embodiments, other metal materials are used as the material of the sampling region 101, such as manganese-nickel-copper alloy.

[0050] In some embodiments, the sampling bar 1 is provided with at least two sets of bending legs 102 , and the bending legs 102 are integrally formed with the sampling bar 1 ;

[0051] The circuit board of the power frequency compensation device 2 is provided with an assembly hole 201 for assembling the bent leg 102;

[0052] like Figure 2 and Figure 3 As shown, the sampling bar 1 and the circuit board where the power frequency compensation device 2 is located are fixed by a bending foot 102, wherein the bending foot 102 and the sampling bar 1 are formed as one piece, and the relative position relationship is stable. After the sampling bar 1 and the circuit board where the power frequency compensation device 2 are located are fixed by the bending foot 102, the relative position relationship between the two is stable, which can effectively increase the overall seismic resistance of the equipment;

[0053] In some embodiments, in order to ensure the stability of the relative positions of the sampling bar 1 and the circuit board where the power frequency compensation device 2 is located, they are fixed by means of insulating snap fasteners.

[0054] In some embodiments, the sampling strip 1 between the two sets of bending legs 102 includes at least a portion of the length of the sampling region 101 ;

[0055] A conductor for electrically connecting the bent leg 102 and the power frequency compensation device 2 is provided at the assembly hole 201 .

[0056] The bending foot 102 can not only fix the relative position of the sampling bar 1 and the circuit board, but also transmit signals between the sampling bar 1 and the power frequency compensation device 2. Moreover, since the bending foot 102 and the sampling bar 1 are formed as one piece, there is no problem of increased resistance at the connection position, which effectively reduces the attenuation loss of the signal and ensures the accuracy of the measurement results.

[0057] In some embodiments, the use of wires to electrically connect the power frequency compensation device 2 to the sampling points on the sampling strip 1 also falls within the scope of protection of this application.

[0058] In some embodiments, the sampling bar 1 is a Z-shaped structure, and the middle section of the sampling bar 1 is perpendicular to the two end sections, and the bending legs 102 are provided in the middle section of the sampling bar 1;

[0059] The circuit board of the power frequency compensation device 2 is parallel to the middle section of the sampling strip 1;

[0060] like Figure 2 As shown, when the electricity consumption information sampling structure is integrated into equipment such as an electric energy meter and a circuit breaker, the incoming line crimping strip or the outgoing line crimping strip of the live wire path is selected as the sampling strip 1. Therefore, the sampling strip 1 is designed as a Z-shaped structure, which is convenient for crimping the line at the end of the crimping strip and helps to arrange the conductive components inside the electric energy meter or circuit breaker, thereby reducing the overall volume of the electric energy meter or circuit breaker. The circuit board of the power frequency compensation device 2 is arranged parallel to the middle section of the sampling strip 1, which helps to reduce the probability of interference between the circuit board and the original components in the electric energy meter or circuit breaker.

[0061] In some embodiments, a sampling line 3 for connection is provided between the power frequency compensation device 2 and the measurement and calculation device 4, and the sampling line 3 is a twisted pair;

[0062] A twisted pair is used for signal transmission between the power frequency compensation device 2 and the measurement and calculation device 4. The high flexibility and high anti-interference ability of the twisted pair are utilized to make the position arrangement of the measurement and calculation device 4 more flexible and improve the anti-interference ability in signal transmission;

[0063] In some embodiments, when the electricity consumption information sampling structure is integrated into the electricity meter, a twisted pair cable is used to transmit the signal of the power frequency compensation device 2 to the electric control board of the electricity meter. The electric control board then connects the signal to the metering device in the electricity meter through its own connector for calculation, thereby obtaining the voltage and current information in the circuit.

[0064] like Figure 4 As shown, in addition to the electricity consumption information sampling structure disclosed in the above embodiments, the present invention also provides an electric energy meter including the above electricity consumption information sampling structure.

[0065] In some embodiments, the sampling strip 1 is an incoming line crimping strip or an outgoing line crimping strip of a live wire path in an electric energy meter.

[0066] In some embodiments, a circuit breaker is integrated in the electric energy meter, and the sampling strip 1 is an incoming wire crimping strip or an outgoing wire crimping strip of the live wire path in the circuit breaker;

[0067] It is worth noting that when selecting the original line to replace the sampling strip 1, it should be ensured that the sampling strip 1 is in the path of the live wire, and the live wire incoming line crimping strip is preferred.

[0068] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0069] The above is a detailed introduction to the electricity consumption information sampling structure and electric energy meter provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified. These improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A power consumption information sampling structure, characterized in that: include: The sampling strip (1) has a sampling area (101) integrally formed in the middle, and the resistivity of the sampling area (101) is greater than the resistivity of other areas of the sampling strip (1); A power frequency compensation device (2) has at least two groups of electrical connection points with the sampling strip (1), and the sampling strip (1) between the two groups of electrical connection points includes at least a portion of the length of the sampling area (101), for compensating the signal collected from the sampling strip (1); A measurement and calculation device (4) is electrically connected to the power frequency compensation device (2) and is used to perform calculation and analysis on the signal transmitted by the power frequency compensation device (2).

2. The power consumption information sampling structure according to claim 1, characterized in that: The sampling area (101) is made of manganese copper and is integrally welded with other areas of the sampling strip (1).

3. The power consumption information sampling structure according to claim 1, characterized in that: The sampling strip (1) is provided with at least two sets of bending legs (102), and the bending legs (102) are integrally formed with the sampling strip (1); An assembly hole (201) for assembling the bending leg (102) is provided on the circuit board of the power frequency compensation device (2).

4. The power consumption information sampling structure according to claim 3, characterized in that: The sampling strip (1) between the two sets of bending legs (102) includes at least a portion of the length of the sampling area (101); A conductor for electrically connecting the bent leg (102) and the power frequency compensation device (2) is provided at the assembly hole (201).

5. The power consumption information sampling structure according to claim 3, characterized in that: The sampling strip (1) is a Z-shaped structure, and the middle section of the sampling strip (1) is perpendicular to the two end sections, and the bending foot (102) is arranged in the middle section of the sampling strip (1); The circuit board of the power frequency compensation device (2) is parallel to the middle section of the sampling bar (1).

6. The power consumption information sampling structure according to any one of claims 1 to 5, characterized in that: A sampling line (3) for connection is provided between the power frequency compensation device (2) and the measurement and calculation device (4), and the sampling line (3) is a twisted pair.

7. An electric energy meter, characterized in that: The invention comprises the electricity consumption information sampling structure as described in any one of claims 1 to 6.

8. The electric energy meter according to claim 7, characterized in that: The sampling strip (1) is an incoming line crimping strip or an outgoing line crimping strip of the live wire path in the electric energy meter.

9. The electric energy meter according to claim 7, characterized in that: The electric energy meter is integrated with a circuit breaker, and the sampling strip (1) is an incoming wire crimping strip or an outgoing wire crimping strip of a live wire path in the circuit breaker.

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