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Powder resistivity testing device

A powder and test fixture technology, applied in measuring devices, measuring resistance/reactance/impedance, measuring electrical variables, etc., can solve the problems of limited measuring range, difficult to replace configuration volume, limited material quantity, etc., to achieve stable pressure and easy use. , good stability

Inactive Publication Date: 2012-09-19
SHANGHAI YAOSHUN ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2. The measurement range is limited: the structure of the traditional powder resistivity test frame is simple and fixed, it is not easy to replace the configuration volume, and there is a relatively fixed limit on the number of materials

Method used

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Examples

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Embodiment Construction

[0027] In order to understand the technical content of the present invention more clearly, the following examples are given in detail.

[0028] The test frame includes rack, pressure mechanism and powder standard container.

[0029] The frame includes a base 1 and a guide rail device 5 fixed on the base 1; a cover 6 is provided on the upper part of the guide rod device, and a vernier caliper P is provided on the side, which is characterized in that it can accurately display the capacity of powder in a standard container 1 . The interior is provided with a stud 9 and a screw screw 10, the stud 9 and the screw screw 10 are connected to the large gear 11 through the cam 13, and the large gear 11 is bonded to the pinion 12 while passing through the outer surface of the fixed seat 4. The power handle 3 reaches the gear transmission, and the purpose drives the pressurizing mechanism to pressurize.

[0030] The pressure mechanism includes a mobile frame 7 and a pressure sensor 8 fi...

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Abstract

The invention relates to a test fixture for powder resistivity, and the test frame is provided with a guide rail device, and a slide caliper is arranged on the surface of the guide rail device and is connected with the base of the guide rail device; a double-screw bolt and a screw mandrel are arranged in a guide rod, and the double-screw bolt and the screw mandrel are connected with a big gear wheel through a cam, so that a big gear wheel and a small gear wheel are bonded to achieve the gear transmission under the effect of an external-force handle to drive a pressure mechanism to pressurize; the pressure mechanism is fixed on a moving frame and is in stud connection with the moving frame; a powder standard container is located above the base and below a pressure sensor and is used for current and voltage drop method, particularly four-terminal measurement method (both current electrode and voltage electrode are contacted with a sample at the same time), so as to eliminate contact resistance errors generated by contact between the electrodes and the powder and eliminate errors caused by the connection system. The fixture is compact in structure, novel in design and convenient in installation and can measure the resistivity of the power sample truly and accurately.

Description

technical field [0001] The invention relates to the technical field of powder resistivity testing, and specifically refers to a device for truly and accurately measuring the resistivity of powder samples, and inspecting and analyzing the quality of the powder samples by adopting the internationally accepted current and voltage drop method, that is, the four-terminal measurement method. Widely used in carbon plants, coking plants, petrochemical plants, powder metallurgy plants, colleges and universities, and scientific research departments. Background technique [0002] The main problems of traditional powder resistivity tester in practical application are as follows: [0003] 1. Poor measurement accuracy: because the accurate test should be based on the four-terminal method, the structural design of the fixture should be done, and the previous fixture deviates from the basic principle of the test in structure due to design and process reasons, so that the test structure does...

Claims

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Application Information

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IPC IPC(8): G01R27/08G01R15/00
Inventor 姚洛春李超马盼东余诗花
Owner SHANGHAI YAOSHUN ELECTRONICS TECH
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