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Polymer-based semiconductive shielding material DC/AC dielectric performance testing system and method

A technology for dielectric properties and testing systems, which can be used in dielectric properties measurement, resistance/reactance/impedance measurement, measurement devices, etc., and can solve problems such as inseparability

Inactive Publication Date: 2017-09-15
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Testing is an effective way to obtain material properties. The research on the dielectric properties of polymer-based semi-conductive shielding materials is inseparable from the support of testing technology. Most of the existing dielectric property testing devices are used in insulating materials. Conductive materials are not suitable for

Method used

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  • Polymer-based semiconductive shielding material DC/AC dielectric performance testing system and method
  • Polymer-based semiconductive shielding material DC/AC dielectric performance testing system and method
  • Polymer-based semiconductive shielding material DC/AC dielectric performance testing system and method

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specific Embodiment 1

[0028] This embodiment is a polymer-based semi-conductive shielding material DC / AC dielectric property test system and method of the polymer-based semi-conductive shielding material DC / AC dielectric property test system and method.

[0029] The polymer-based semiconductive shielding material DC / AC dielectric property test system of this embodiment, the structural diagram is as follows figure 1 As shown, the DC / AC dielectric property test system for polymer-based semi-conductive shielding materials includes a power amplifier 1, a current limiting resistor 2, an electrode system 3, a sample 4, a sampling resistor 5, a filter amplifier circuit 6, and a data acquisition card 8 And computer 9, described electrode system 3 is made up of unprotected electrode 31, guard electrode 32 and measuring electrode 33, and sample 4 is positioned on electrode system 3, and electrode system 3 connects current-limiting resistance 2, filter amplifier circuit 6 and sampling respectively The resisto...

specific Embodiment 2

[0036] The DC / AC dielectric property test system of the polymer-based semiconductive shielding material of the present embodiment, such as figure 2 shown, as figure 2 As shown, the power amplifier circuit is composed of operational amplifier one U1 and operational amplifier two U2. Among them, operational amplifier 1 U1 is used to form an inverse proportional circuit, and its magnification is determined by the ratio of resistor 2 R2 to resistor 1 R1; operational amplifier 2 U2 is used to form a voltage follower to isolate and drive the load. In this embodiment, both operational amplifier chips are LM7171 high-speed voltage feedback operational amplifiers, the power supply voltage is plus or minus 15V, the output peak voltage is 13V, and the maximum output current is 100mA.

specific Embodiment 3

[0037] This embodiment is a method for testing the DC / AC dielectric properties of a polymer-based semi-conductive shielding material DC / AC dielectric property test system and method of the polymer-based semi-conductive shielding material. The operation process is as follows image 3 shown, including the following steps:

[0038] Step a, start the software program to enter the user interface;

[0039] Step b, input the thickness parameter of sample 4 on the user interface; set the excitation signal parameters, the excitation signal parameters include physical channel, frequency and amplitude; set the data acquisition parameters, the data acquisition parameters include physical channel, sampling mode, sampling Frequency and number of sampling points;

[0040] Step c, start the 8D / A port of the data acquisition card to output the excitation signal, and start the A / D acquisition program, the digital signal processing program and the data display program simultaneously;

[0041] ...

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Abstract

The invention provides a polymer-based semiconductive shielding material DC / AC dielectric performance testing system and method, and relates to the technical field of electrical insulation testing technology. The polymer-based semiconductive shielding material DC / AC dielectric performance testing system includes a power amplifier, a current-limiting resistor, an electrode system, a sample, a sampling resistor, a filtering amplification circuit, a data acquisition card and a computer. The polymer-based semiconductive shielding material DC / AC dielectric performance testing method includes the steps: starting the program to enter the interface; inputting the thickness, the excitation signal and the data acquisition parameter of the sample; starting the data acquisition card to output the excitation signal; starting the acquisition program, the digital signal processing program and the data display program; according to the magnitude of the acquired data adjusting sampling resistor, enabling the excitation voltage to be approximate to the response current amplitude; storing the acquired excitation voltage and response current; and when completing sampling, stopping acquisition and calculating the excitation voltage and the response current to obtain the alternating current dielectric parameters and display the alternating current dielectric parameters. The polymer-based semiconductive shielding material DC / AC dielectric performance testing system and method can realize measurement of the alternating current dielectric performance parameters of the polymer-based semiconductive shielding material in different frequency, such as the alternating current effective dielectric constant and the alternating equivalent conductivity.

Description

technical field [0001] The invention relates to a DC / AC dielectric performance testing system and method of a polymer-based semiconductive shielding material, which relates to the technical field of electrical insulation testing. Background technique [0002] Semi-conductive shielding material is a multi-phase composite material with certain conductivity and excellent mechanical properties formed by compounding conductive fillers and polymers by physical or chemical methods. Its conductivity is mainly affected by the properties and concentration of fillers. Semi-conductive shielding materials can be widely used in power cables, electrostatic shielding, microwave absorption and other fields. [0003] Taking cross-linked power cables as an example, the main function of setting a semi-conductive shielding layer in the cable is to reduce the air gap and burrs on the interface between the conductor and the insulating layer, so that the electric field is distributed evenly, the el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/26
CPCG01R27/2623G01R27/2617
Inventor 李忠华许景华
Owner HARBIN UNIV OF SCI & TECH