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Alternate current/direct current voltage transducer and detection method

A technology of AC and DC voltage and detection method, which is applied in the direction of measurement using digital measurement technology, can solve the problems of affecting measurement accuracy, complex calculation, complex structure of voltage sensor, etc., and achieve simple processing method, stable and reliable device, and simple structure Effect

Active Publication Date: 2015-07-29
天津金星奥宇科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is that the existing voltage sensor has complicated structure and complicated calculation, which affects the measurement accuracy, thereby proposing a simple structure, convenient production, stable and reliable AC and DC voltage sensor that can directly measure high and low voltage

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  • Alternate current/direct current voltage transducer and detection method
  • Alternate current/direct current voltage transducer and detection method
  • Alternate current/direct current voltage transducer and detection method

Examples

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Embodiment 1

[0066] This embodiment provides an AC and DC voltage sensor, the specific structural block diagram is as follows figure 1 As shown, it includes: induction device 1 , signal conditioning device 2 and central amplifier 3 .

[0067] First, the sensing device 1 is as image 3 As shown, the induction device 1 is an overlapping three-layer structure, bonded together, including two metal plates 11 on both sides and an insulating plate 12 between the two metal plates 11, the induction device 1 It is not in contact with the component under test 14 and is arranged along the extending direction of the component under test 14 . In this embodiment, it is used to measure the power supply line voltage of 10kV, including a shown induction device 1, as shown in Fig. 11 is a copper plate with a thickness of 0.1 millimeter, a length of 20 centimeters, a width of 10 centimeters, and a surface area of ​​200 square centimeters. The thickness of the insulating plate 12 is 3 millimeters, and the si...

Embodiment 2

[0077] In this embodiment, on the basis of the first embodiment, the signal conditioning device 2 is different from the first embodiment, as figure 2 As shown, it specifically includes: a differential amplifier 24 and an integral filter amplifier 25 . The differential amplifier 24 is connected to the two metal plates 11 of the induction device 1 respectively, and amplifies and outputs the voltage signal induced by the induction device 1; the integral filter amplifier 25 is connected to the differential amplifier 24 to convert the differential The voltage signal output by the dynamic amplifier 24 is output after being filtered and denoised. It can perform multi-stage filtering and multiple amplification processing, so that the obtained voltage signal is stable and reliable.

Embodiment 3

[0079] The difference between this embodiment and Embodiment 1 is that the sensing device 1 is a curved surface, and its structural schematic diagram is as follows Figure 4 As shown, that is, the induction device 1 is a semicircular curved surface, which is arranged around the element to be tested, and is mainly used for voltage measurement of cylindrical wires. The schematic diagram of its installation is shown in Figure 7 shown.

[0080] The surface area of ​​the metal plate 11 and the insulating plate 12 is 5-1000 square centimeters, and the thickness of the metal plate is 0.01-10 mm. The thickness of the insulating board is 0.1-100 mm. The distance between the sensing device and the component to be tested is 0.1-1000 mm. The surface area and thickness of the metal plate 11 and insulating plate 12 and the distance from the component to be tested are selected mainly according to the comprehensive factors of the voltage level of the component to be tested 14, ambient envi...

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Abstract

The invention provides an alternate current / direct current voltage transducer. The alternate current / direct current voltage transducer comprises one or more sensing devices, signal conditioning devices and a central processing unit, the sensing devices are in multi-layer structure that is formed by alternately overlapping of metal plates and insulation plates, the sensing devices comprise at least two metal plates and the insulation plates that are arranged between the two metal plates, and the sensing devices are not in contact with a to-be-detected part and arranged along the extending direction of the to-be-detected part. The signal conditioning devices are connected with the two metal plates of the sensing devices respectively, and conditioning is performed on voltage signals that are obtained by the metal plates. The central processing unit is connected with the signal conditioning devices and signals that are output by the signal conditioning devices are subjected to sampling and data processing and converted to voltage values of the to-be-detected part. The sensing devices are installed at positions in a certain distance around the to-be-detected part, hot-line work can be achieved, mounting is convenient, the to-be-detected part senses that the two metal plates are charged, the voltage values of the to-be-detected part are obtained through detection of potential difference of the two metal plates, the processing method is simple, and the sensing devices are simple in structure, convenient to produce and excellent in performances.

Description

technical field [0001] The invention relates to an AC and DC voltage sensor and a detection method. Specifically, it is a voltage sensor and detection method capable of measuring high and low voltage AC and DC. Background technique [0002] In the power supply system, whether it is a high-voltage AC system or a high-voltage DC system, it is necessary to measure the voltage to realize the functions of measurement, control, adjustment, and metering of the power supply system; in the field of measurement and control, it is also necessary to measure AC or DC Voltage, in order to achieve the purpose of measurement and control; the current voltage sensors mainly include the following types: traditional ferromagnetic voltage transformers, resistance voltage divider transformers, capacitive voltage divider transformers, fiber optic transformers, among which ferromagnetic Due to the iron core coil, the transformer has a large volume and uses more copper resources; for the optical fi...

Claims

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Application Information

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IPC IPC(8): G01R19/25
Inventor 冯汉春
Owner 天津金星奥宇科技有限公司
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