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Moisture-insulated strain gauge and method of insulating a strain gauge against moisture penetration

A technology of moisture penetration and strain gauges, which can be used in instruments, measuring forces, measuring devices, etc., and can solve problems such as infeasibility

Inactive Publication Date: 2021-06-04
METTLER TOLEDO CHANGZHOU PRECISION INSTR +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main problem with this solution is that in the case of the moisture-proof rubber sheet of US 5,052,505 the small air Leak testing does not appear to be feasible in terms of space

Method used

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  • Moisture-insulated strain gauge and method of insulating a strain gauge against moisture penetration
  • Moisture-insulated strain gauge and method of insulating a strain gauge against moisture penetration
  • Moisture-insulated strain gauge and method of insulating a strain gauge against moisture penetration

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Embodiment Construction

[0054] figure 1A double-beam cantilever load cell 1 is shown having an upper side 2 and a lower side 3 (not visible), a load-receiving end 4 and a mounting end 5 , an upper 6 and a lower 7 bent beam. The load receiving end 4 has two threaded holes 8 from the top side 2 for connecting a weighing platform or other kind of load receiver. The mounting end 5 similarly has two threaded holes from the bottom (not visible in the figure) for mounting the load cell 1 on the base plate of a weighing scale (not shown) or any other kind of supporting base structure superior. The curved beam portions 6 , 7 are formed by machining a suitably shaped opening 9 through the center of the load cell 1 . The opening 9 is shaped such that a thin bridge 10 can be formed in the curved beam 6 , 7 . Four strain gauges 12 - two on the upper bent beam 6 and two (not visible) on the lower bent beam 7 are mounted such that their resistance strips are exactly aligned and centered on the thin bridge 10 . ...

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Abstract

A strain gauge (12, 21A, 21B, 25A, 25B, 31, 35, 41, 45) and method of manufacturing a strain gauge (12, 21A, 21B, 25A, 25B, 31, 41, 35, 45) against moisture penetration comprises or includes the step of producing a coated base or cover layer (14, 34, 44) by forming a moisture barrier coating (17) on the surface the latter.

Description

technical field [0001] The invention relates to a strain gauge for isolating moisture penetration and a manufacturing method for the strain gauge for isolating moisture penetration. Of particular interest are strain gauges for load cells, but are not thereby implied or intended to be limited, as the inventive method is considered to be fully applicable to strain gauges used in other applications. Furthermore, the moisture barrier method according to the invention can be applied in one of three ways: a) during the manufacturing process of the strain gauge; b) applied to the new strain gauge itself; or c) applied on the load cell or on the A strain gauge in its installed state on any object on which strain measurements are made. The scope of the invention extends to strain gauges and load cells comprising moisture protection insulation produced by the method of the invention. Background technique [0002] Conventional strain gauges currently on the market generally have the ...

Claims

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Application Information

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IPC IPC(8): G01L1/22G01L1/26
CPCG01L1/2243G01L1/2287G01L1/26
Inventor 朱向群石志国许磊J-C·埃默里
Owner METTLER TOLEDO CHANGZHOU PRECISION INSTR
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