Non-contact measurement voltage and current transformer

Abstract

The invention discloses a non-contact measurement voltage and current transformer, which comprises a transformer body, a first voltage measurement plate, a second voltage measurement plate, a circuit board, a temperature sensor and a telescopic air bag, and is characterized in that the transformer body is provided with a wire passing hole, and the hole wall of the wire passing hole is provided with a placement hole; the second voltage measuring plate and the temperature sensor are connected with the telescopic air bag, the temperature sensor, the second voltage measuring plate and the telescopic air bag are arranged in the placement hole, the temperature sensor is exposed through the placement hole, the first voltage measuring plate and the circuit board are arranged in the mutual inductor body, and the second voltage measuring plate and the circuit board are arranged in the mutual inductor body. The first voltage measuring plate, the second voltage measuring plate and the temperature sensor are electrically connected with the circuit board. Compared with the prior art, non-contact voltage measurement can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of mutual inductors, and in particular to a contactless voltage and current measuring mutual inductor. Background Art

[0002] In the operation and maintenance of power systems, accurate measurement of line voltage is crucial. In many cases, traditional measurement methods use puncture power sampling to achieve voltage measurement. The puncture power sampling technology has played an important role in some specific high-voltage line measurement scenarios. It can directly obtain power information on the line, and then realize the measurement and analysis of parameters such as voltage.

[0003] However, in the low-voltage monitoring environment, the puncture power supply method faces many problems. Low-voltage lines usually have their own structural characteristics and operating characteristics. Their voltage levels are relatively low, the line distribution is more complex and extensive, and there are many interference factors in the surrounding environment. If the puncture power supply method is adopted, on the one hand, it is very easy to damage the insulation performance of the low-voltage line, causing safety hazards such as leakage and short circuit, and seriously affecting the stable operation of the low-voltage power system; on the other hand, the puncture operation may cause the mechanical strength of the line to decrease, shorten the service life of the line, and increase the cost and difficulty of line maintenance. Moreover, the puncture power supply equipment itself is relatively complex, and the cost-effectiveness of using it in a low-voltage environment is extremely low.

[0004] In view of this, a contactless voltage and current transformer is proposed. Summary of the invention

[0005] The object of the present invention is to provide a non-contact voltage and current measurement transformer, which can realize non-contact voltage measurement.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A contactless voltage and current measurement transformer comprises a transformer body, a first voltage measurement plate, a second voltage measurement plate, a circuit board, a temperature sensor and a telescopic airbag, wherein the transformer body is provided with a wire through hole, the hole wall of the wire through hole is provided with an installation hole, the second voltage measurement plate and the temperature sensor are connected to the telescopic airbag, the temperature sensor, the second voltage measurement plate and the telescopic airbag are arranged in the installation hole, the temperature sensor is exposed through the installation hole, the first voltage measurement plate and the circuit board are arranged in the transformer body, and the first voltage measurement plate, the second voltage measurement plate and the temperature sensor are electrically connected to the circuit board.

[0008] In a preferred embodiment, the telescopic airbag has a plurality of disc-shaped segments, and the telescopic airbag is made of rubber material.

[0009] In a preferred embodiment, the first voltage measurement plate is configured to be in an arc shape, a notch is provided on the first voltage measurement plate, and the placement hole passes through the notch.

[0010] In a preferred embodiment, the temperature sensor is provided with a step surrounding the temperature sensor, and the second voltage measurement board is passed through by the temperature sensor and abuts against the step.

[0011] In a preferred embodiment, the second voltage measurement plate is configured in a circular shape.

[0012] Compared with the prior art, the non-contact voltage and current transformer of the present invention is mainly composed of a transformer body, a first voltage measurement board, a second voltage measurement board, a circuit board, a temperature sensor and a telescopic airbag, etc. The transformer body is provided with a wire-through hole, and the wall of the wire-through hole is provided with a placement hole. The second voltage measurement board, the temperature sensor and the telescopic airbag are connected and placed in the placement hole, the temperature sensor is exposed, the first voltage measurement board and the circuit board are located in the transformer body, and each component is electrically connected to the circuit board.

[0013] Its working principle is as follows: First, the first voltage measurement board measures the line voltage, and the measured voltage is transmitted to the circuit board, and the voltage measurement data is obtained after the circuit board analyzes and amplifies it. At the same time, the temperature sensor can sense the temperature, because the temperature will affect the operation of circuit components, such as resistance, and thus affect the accuracy of the voltage measurement value. In actual measurement, the terminal or server stores a voltage measurement model obtained through a large amount of data training, which simulates the relationship between the measured voltage and the actual voltage at different temperatures. When a specific voltage value is measured at a specific temperature, the temperature value and the voltage measurement value are compared with the voltage measurement model, and the measured voltage is adjusted accordingly to obtain the actual voltage, thereby eliminating unstable factors in the measurement process and improving the accuracy of voltage measurement.

[0014] In addition, the telescopic airbag will produce a telescopic effect due to temperature changes, driving the second voltage measurement board to move, and the second voltage measurement board can measure the measured voltage changes during the temperature change process. During its movement, the voltage data is collected and analyzed. If the voltage data conforms to the theoretical value, it means that only the cable voltage is measured, because under normal circumstances, the voltage data measured during the movement of the second voltage measurement board should have a preset rule; if it does not conform to the preset rule, there may be situations such as excessive temperature in the transformer affecting the telescopic airbag or external voltage interference sources. At this time, the voltage sensing data should not be used as correct data, and related interference needs to be eliminated to further improve the accuracy of voltage data detection. In addition, the temperature sensor moves with the telescopic airbag, and the temperature data in motion is associated with the voltage data measured by the second voltage measurement board. Under specific working conditions, the voltage data that the second measurement board should measure can be calculated. If the actual data obtained does not match the calculated result, it indicates that there is an interference source.

[0015] Through the above structural design and working principle, the accuracy of voltage measurement is effectively improved. On the one hand, by combining the temperature sensor with the voltage measurement model, the measurement error caused by temperature change can be corrected, making the measurement result closer to the actual voltage value. On the other hand, the cooperation of the second voltage measurement board and the telescopic airbag can not only monitor the dynamic changes of voltage during temperature changes, but also judge whether there are interference factors based on the voltage data rules, eliminate abnormal data in time, and ensure the reliability of measurement data. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The invention relates to a structural schematic diagram of a contactless voltage and current measuring transformer.

[0017] Figure 2 The present invention relates to a structural schematic diagram of a contactless voltage and current measurement transformer with part of the casing removed.

[0018] Figure 3 The present invention relates to a structural schematic diagram of a non-contact voltage and current measuring transformer with another part of the shell removed.

[0019] Figure 4 The invention relates to a longitudinal section structural schematic diagram of a placement hole for contactless voltage and current measurement of a voltage and current transformer.

[0020] Figure 5 The invention relates to a structural schematic diagram of a second voltage measuring plate, a temperature sensor and a telescopic airbag for contactless voltage and current measurement of a voltage and current transformer.

[0021] Figure 6 The invention relates to a schematic diagram of an amplifying circuit for contactless voltage and current measurement of a transformer.

[0022] In the picture

[0023] Transformer body 1; wire hole 2; placement hole 3; first voltage measurement board 4; notch 5; second voltage measurement board 6; circuit board 7; temperature sensor 8; step 9; telescopic airbag 10. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0025] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0026] like Figures 1 to 5As shown, a contactless voltage and current transformer comprises a transformer body 1, a first voltage measuring plate 4, a second voltage measuring plate 6, a circuit board 7, a temperature sensor 8 and a telescopic airbag 10, wherein the transformer body 1 is provided with a wire through hole 2, and the hole wall of the wire through hole 2 is provided with a placement hole 3, the second voltage measuring plate 6 and the temperature sensor 8 are connected to the telescopic airbag 10, the temperature sensor 8, the second voltage measuring plate 6 and the telescopic airbag 10 are arranged in the placement hole 3, and the temperature sensor 8 is exposed through the placement hole 3, the first voltage measuring plate 4 and the circuit board 7 are arranged in the transformer body 1, and the first voltage measuring plate 4, the second voltage measuring plate 6, the temperature sensor and the circuit board 7 are electrically connected.

[0027] A non-contact voltage and current transformer of the present embodiment is mainly composed of a transformer body 1, a first voltage measurement board 4, a second voltage measurement board 6, a circuit board 7, a temperature sensor 8 and a telescopic airbag 10. The transformer body 1 is provided with a wire-passing hole 2, and a placement hole 3 is provided on the wall of the wire-passing hole 2. The second voltage measurement board 6 and the temperature sensor 8 are connected to the telescopic airbag 10 and placed in the placement hole 3, and the temperature sensor 8 is exposed. The first voltage measurement board 4 and the circuit board 7 are located in the transformer body 1, and each component is electrically connected to the circuit board 7.

[0028] Its working principle is as follows: First, the first voltage measurement board 4 measures the line voltage, and the measured voltage is transmitted to the circuit board 7, and the voltage measurement data is obtained after analysis and amplification by the circuit board 7. At the same time, the temperature sensor 8 can sense the temperature, because the temperature will affect the operation of circuit components, such as resistance, and thus affect the accuracy of the voltage measurement value. In actual measurement, the terminal or server stores a voltage measurement model obtained through a large amount of data training, which simulates the relationship between the measured voltage and the actual voltage at different temperatures. When a specific voltage value is measured at a specific temperature, the temperature value and the voltage measurement value are compared with the voltage measurement model, and the measured voltage is adjusted accordingly to obtain the actual voltage, thereby eliminating unstable factors in the measurement process and improving the accuracy of voltage measurement.

[0029] In addition, the telescopic airbag 10 will produce a telescopic effect due to temperature changes, driving the second voltage measurement board 6 to move, and the second voltage measurement board 6 can measure the measured voltage changes during the temperature change process. During its movement, the voltage data is collected and analyzed. If the voltage data conforms to the theoretical value, it means that only the cable voltage is measured, because under normal circumstances, the voltage data measured during the movement of the second voltage measurement board 6 should have a preset rule; if it does not conform to the preset rule, there may be situations such as excessive temperature in the transformer affecting the telescopic airbag 10 or external voltage interference sources. At this time, the voltage sensing data should not be used as correct data, and related interference needs to be eliminated to further improve the accuracy of voltage data detection. In addition, the temperature sensor 8 moves with the telescopic airbag 10, and the temperature data in motion is associated with the voltage data measured by the second voltage measurement board 6. Under specific working conditions, the voltage data that the second measurement board should measure can be calculated. If the actual data obtained does not conform to the calculated result, it indicates that there is an interference source.

[0030] Through the above structural design and working principle, the accuracy of voltage measurement is effectively improved. On the one hand, by combining the temperature sensor 8 with the voltage measurement model, the measurement error caused by temperature change can be corrected, making the measurement result closer to the actual voltage value. On the other hand, the cooperation of the second voltage measurement board 6 and the telescopic airbag 10 can not only monitor the dynamic change of voltage during temperature change, but also judge whether there are interference factors based on the voltage data law, eliminate abnormal data in time, and ensure the reliability of measurement data.

[0031] The telescopic airbag 10 has a plurality of disc-shaped segments, and the telescopic airbag 10 is made of rubber material. The rubber material gives the telescopic airbag 10 good elasticity and flexibility, so that it can sensitively respond to temperature changes to produce telescopic movements. The plurality of disc-shaped segments enhances the flexibility and stability of telescopic movement, and can deform more smoothly and orderly during the telescopic process, reducing the measurement error caused by structural instability. This structure helps to accurately drive the second voltage measurement plate 6 to move, thereby accurately obtaining the voltage measurement data changes during the temperature change process.

[0032] The first voltage measurement plate 4 is set to be in an arc shape, and a notch 5 is provided on the first voltage measurement plate 4, and the placement hole 3 passes through the notch 5. The arc-shaped design enables it to better fit the spatial structure in the transformer body 1, make full use of the internal space, improve the space utilization rate, help to achieve a more reasonable layout in a limited space, and reduce the mutual interference between the components. The existence of the notch 5 and the setting mode of the placement hole 3 passing through the notch 5 cleverly provide convenience for the installation and layout of the second voltage measurement plate 6, the temperature sensor 8 and the telescopic airbag 10 and other components in the placement hole 3, so that they can be smoothly connected with other structures inside the transformer body 1, ensuring the integrity and coherence of the entire measurement system. This layout mode is also conducive to the planning and arrangement of electrical connection lines between the components, reducing the clutter and entanglement of the lines, reducing the risk of signal transmission interference or failure caused by line problems, thereby improving the stability and accuracy of voltage measurement. In addition, through this compact structural setting, the temperature sensor is close to the first voltage measurement plate 4 and the second voltage measurement plate 6, so as to achieve accurate temperature measurement.

[0033] The temperature sensor 8 is provided with a step 9 surrounding it, and the second voltage measuring plate 6 is passed through by the temperature sensor 8 and abuts against the step 9. Through such a structural setting, a stable structural setting is achieved, ensuring smooth operation, and the bottom of the telescopic airbag 10 is connected to the inner wall of the placement hole 3.

[0034] In order to achieve a reasonable structural setting and make the structure compact, the second voltage measuring plate 6 is set to be circular.

[0035] In this embodiment, the amplification circuit of the data measured by the first voltage measurement board 4 and the second voltage measurement board 6 is as follows: Figure 6 As shown, in the circuit, J4 is the signal input of the voltage measurement board, U6 is the voltage follower, and U5 is the adder. After two-stage amplification processing, V++ outputs the voltage signal. The resistor in the circuit acts as parameter adjustment, and the capacitor acts as filtering.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "include..." or "comprise..." do not exclude the existence of other elements in the process, method, article or terminal device including the elements. In addition, in this article, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself.

[0037] The above description of the embodiments is to facilitate the understanding and use of the present invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to the embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. A non-contact voltage and current transformer, characterized in that: It includes a transformer body, a first voltage measurement board, a second voltage measurement board, a circuit board, a temperature sensor and a telescopic airbag. The transformer body is provided with a wire through hole, and the hole wall of the wire through hole is provided with an installation hole. The second voltage measurement board and the temperature sensor are connected to the telescopic airbag. The temperature sensor, the second voltage measurement board and the telescopic airbag are arranged in the installation hole, and the temperature sensor is exposed through the installation hole. The first voltage measurement board and the circuit board are arranged in the transformer body, and the first voltage measurement board, the second voltage measurement board, and the temperature sensor are electrically connected to the circuit board.

2. A non-contact voltage and current transformer according to claim 1, characterized in that: The telescopic airbag has a plurality of disc-shaped segments and is made of rubber material.

3. The non-contact voltage and current transformer according to claim 1, characterized in that: The first voltage measurement plate is configured to be in an arc shape. A notch is provided on the first voltage measurement plate, and the placement hole passes through the notch.

4. The non-contact voltage and current transformer according to claim 1, characterized in that: The temperature sensor is provided with a step surrounding the temperature sensor, and the second voltage measuring plate is passed through by the temperature sensor and abuts against the step.

5. A non-contact voltage and current transformer according to claim 4, characterized in that: The second voltage measuring plate is configured in a circular shape.

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