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Magnetic jars for moving coil units of electronic balances

An electronic balance and electromagnetic technology, applied in the direction of weighing equipment using electromagnetic balance, measuring devices, weighing equipment with special properties/forms, etc.

Active Publication Date: 2021-06-08
SARTORIUS LAB INSTR GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This influence on the effective magnetic field strength cannot be eliminated by the aforementioned correction possibilities

Method used

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  • Magnetic jars for moving coil units of electronic balances
  • Magnetic jars for moving coil units of electronic balances
  • Magnetic jars for moving coil units of electronic balances

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] Figures 1 to 3In each case a moving coil arrangement is shown, which is especially suitable for sensor systems of precision balances operating on the principle of electromagnetic compensation.

[0031] The moving coil arrangement here comprises a moving coil 10 and a magnet pot 20 respectively. In the final assembly position, the moving coil 10 is fastened to a lever arm (not shown) of the balance system and sunk into the magnetic field of the magnet pot 20 , as schematically shown roughly in the figure.

[0032] The magnetic tank 20 comprises a hollow cylindrical tank wall 22 protruding from a tank bottom 24 . A permanent magnet structure 26 is formed concentrically within the tank wall 22 , essentially consisting of a permanent magnet 261 and a pole plate 262 . The permanent magnet 261 has a substantially cylindrical shape. The pole plate 262 is substantially disk-shaped. The permanent magnet 261 and the pole plate 262 are bonded to each other by an adhesive laye...

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PUM

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Abstract

The invention relates to a magnetic tank (20) for a moving coil device (10) of an electronic balance working on the principle of electromagnetic compensation, comprising: - a tank bottom (24) and a tank protruding vertically from the tank bottom (24) wall (22), and a permanent magnet structure (26) arranged with an annular gap with the tank wall inside the tank wall (22), the permanent magnet structure has a permanent magnet (261) arranged on the bottom side of the tank and connected to the permanent magnet The face of the magnet facing away from the bottom of the tank is connected to a pole plate (262). The present invention is characterized in that the pole plate (262) is fixed with a predetermined distance from the bottom of the tank by a rigid mechanical connection to the tank bottom (24) independent of the permanent magnet (261), and the permanent magnet (261 ) is bonded to the tank bottom side surface of the pole plate (262) without contacting the tank bottom (24).

Description

technical field [0001] The invention relates to a magnetic tank for a moving coil device of an electronic balance that works according to the principle of electromagnetic compensation, comprising: [0002] - bottoms and walls projecting vertically from the bottom, and [0003] - A permanent magnet structure arranged within the tank wall with an annular gap thereto, the permanent magnet structure having a permanent magnet arranged on the side of the tank bottom and a pole plate connected to the side of the permanent magnet facing away from the tank bottom. Background technique [0004] A moving coil arrangement with such a magnetic pot is known from DE 10 2010 013 764 B4. Although this document does not explicitly mention the use of the moving coil arrangement disclosed therein for electronic balances operating on the principle of electromagnetic compensation; the disclosed moving coil arrangement still corresponds to the type usually used in electronic balances. [0005] E...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01G7/02H01F7/02
CPCG01G17/04H01F7/0289G01G7/02
Inventor 拉尔斯·博尔内曼米夏埃尔·米勒克里斯蒂安·施拉德尔费德瑞奇·赫尔曼森乔纳斯·博德塔尼娅·穆克
Owner SARTORIUS LAB INSTR GMBH & CO KG