Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Elastic contact three-electrode device

An elastic contact and three-electrode technology, which is applied in measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve problems such as increasing pressure, large dielectric loss of empty electrodes, and complex overall structure of measuring devices, and achieve loss The effect of small value, accurate capacitance value and loss value

Inactive Publication Date: 2013-07-17
TONGJI UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to prevent this situation, the method of increasing pressure is adopted, and the measuring electrode is in close contact with the sample, but it may cause unnecessary deformation of the sample, and the overall structure of the measuring device is very complicated.
[0004] The supporting accessory Agilent 16451B dielectric test fixture produced by Agilent Company of the United States also has a set of three-electrode devices. The measuring pole and the protective pole are fixed, the gap is very small, about 0.2mm, and they are not on the same plane, and the protective pole is slightly smaller. Indentation, which avoids the problem of small air gaps in the measurement area when the sample to be tested is not ideally flat, but the dielectric loss of the empty electrode of this electrode is relatively large, and it cannot be used for accurate measurement of the medium materials with little loss

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Elastic contact three-electrode device
  • Elastic contact three-electrode device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] see figure 1 . A contact-type three-electrode device with a diameter of 74 mm of the present invention for measuring the permittivity and loss tangent of an insulating medium is made, and the device is a shielded contact-type three-electrode structure. The diameter of the measuring electrode 13 is 49 mm, the inner diameter of the shielding electrode 3 is 51 mm, and the equivalent diameter of the measuring electrode is 50 mm:

[0019] The sample 2 to be tested is placed on the high voltage electrode 1 connected to the high voltage terminal H of the balance bridge, and the measurement electrode 13 is placed at the center of the sample 2. The shape of the measurement electrode 13 is a cylinder with a boss on the top. There is a ring-shaped shielding electrode 3 around the sleeve, and the shielding electrode 3 is a protective ring electrode. The inner circumference of the top of the shielding electrode 3 is cut off a circle, and a step is expanded outward from the outer ci...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an elastic contact three-electrode device, and relates to equipment for measuring the dielectric constant and loss angle tangent of an electric insulation material. The device comprises a high-pressure electrode (1) connected with a high-pressure end H of a balanced bridge, and a test sample (2) on the high-pressure electrode (1), wherein a measuring electrode (13) and a shielding electrode (3) connected with a protection end G of the balanced bridge are arranged on the test sample (2). The device is characterized in that: the top of the measuring electrode (13) is provided with a metal corrugated pipe (12), a corrugated pipe suite (11), an insulation support (10) and a measuring end connector socket (9) connected with a measuring end M of the balanced bridge; the shielding electrode (3) is connected with an upper shielding electrode (6), an upper shielding electrode cover plate (7) and a counter weight (8) through a shielding electrode connecting ring (4) in threaded connection with the shielding electrode (3); and a measuring electrode positioning ring (5) is arranged between the measuring electrode (13) and the shielding electrode (3). The device has high measuring accuracy and is suitable for a thick film or a thin flat plate with a low-loss medium.

Description

technical field [0001] An elastic contact-type three-electrode device relates to a contact-type three-electrode device in a balanced electric bridge for measuring the dielectric constant and loss tangent of electrical insulating materials. Background technique [0002] Using a balanced bridge to measure the permittivity and loss tangent of the insulating medium under power frequency has high measurement sensitivity and high measurement accuracy, so it is widely used in the electrical insulation industry. The corresponding Chinese national standard (GB1409-88) and IEC standard (IEC 250-1969) and American ASTM standard (ASTM D 150-98 (2004)) suggest that the measuring electrodes all adopt a three-electrode system. However, so far, the simple three-electrode system is composed of a cylindrical measuring pole and a circular guard pole. Since the measuring pole of the above-mentioned three-electrode system is not shielded, it is susceptible to external electromagnetic interferen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/26
Inventor 张冶文郑飞虎张延庆王繁基
Owner TONGJI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products