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Test piece fixture for Helmholtz coil testing

A technology of Helmholtz coils and fixing fixtures, which is applied to the parts of electrical measuring instruments, measuring devices, and measuring electrical variables, etc., can solve the problem that it is difficult to ensure that the cuboid stage is placed horizontally, it is difficult to modify its size, and the measured To solve problems such as unstable components, achieve the effects of reasonable design, reduced scratches, and precise position fixation

Active Publication Date: 2019-04-09
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Helmholtz coil itself is in the shape of a ring, and it is difficult to ensure the level of the cuboid stage.
Moreover, it is often difficult to modify the size of the stage after it is ready, and the reusability rate is low. For Helmholtz coils of different sizes, it is very inconvenient to use stages of different sizes.
In addition, this method of fixing the stage, whether it is the stage itself or the tested part on it, is very unstable, and cannot be used in an outdoor windy environment
Moreover, if the operation is not done properly when fixing the test piece, it is easy to cause damage to the test piece.

Method used

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  • Test piece fixture for Helmholtz coil testing
  • Test piece fixture for Helmholtz coil testing
  • Test piece fixture for Helmholtz coil testing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] see figure 1 , the Helmholtz coil test fixture of this embodiment is composed of a slotted central shaft rod 2 and two cross-shaped connecting rods 1 . The lengths of the four poles of the two cross-shaped connecting rods 1 are equal, and the two connecting rods 1 are respectively fixed in the two coils of the Helmholtz coil, so as to ensure that the central axis rod 2 is located in the two coils of the Helmholtz coil. on the axis of each coil, and the axis of the central axis coincides with the axis of the coil. Therefore, it can be ensured that the center of the central shaft 2 is located in the area with the best uniform magnetic field of the Helmholtz coil, and the test piece used in the experiment is placed in the slot of the central shaft 2, that is, the test piece is completed. Permanent job.

[0028] The cross-shaped connecting rod 1 used in the fixture of this embodiment determines the center of a single Helmholtz coil through four equal-length struts, and th...

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Abstract

The invention provides a test piece fixture for Helmholtz coil testing, which consists of a central shaft lever and two connecting rods sleeving the central shaft lever, wherein the positions of the two connecting rods on the central shaft lever are adjustable; each connecting rod is composed of a supporting block and 3 to 4 telescopic struts uniformly distributed in radial circumference on the supporting block; the telescopic struts have the same length; the connecting rods are installed in a Helmholtz coil by the acting force and the counter-acting force when the tail ends of the telescopicstruts are in contact with the inner side of the Helmholtz coil; the middle parts of the support blocks are provided with through holes for allowing the central shaft lever to pass through; a groove for containing an experimental test piece is arranged at the center of the central shaft lever; and the central shaft lever is arranged coaxial with the Helmholtz coil. The fixture can quickly and accurately locate the test piece in the uniform magnetic field area in the middle of the Helmholtz coil, and can be applied to Helmholtz coils of different sizes.

Description

technical field [0001] The invention relates to a Helmholtz coil testing device, in particular to a fixture for fixing a tested part for Helmholtz coil testing. Background technique [0002] A Helmholtz coil is a device used to create a uniform magnetic field over a small area. The Helmholtz coil consists of a pair of identical conductor coils with circular or square cross-sections. The two coils are arranged parallel to each other and coaxially. The distance between the two coils is equal to the coil radius. Each coil has a Current in the same direction. In this way, a highly uniform magnetic field can be generated at the center of the two coils. [0003] Helmholtz coils are widely used in many electromagnetic research fields, such as generating standard magnetic fields, canceling and compensating the earth's magnetic field, simulating the geomagnetic environment, judging the effect of magnetic shielding, electromagnetic interference simulation experiments, Hall probes an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R1/04
CPCG01R1/0425
Inventor 姜豪瞿体明张济龙
Owner TSINGHUA UNIV
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