Invention Grant
- Patent Title: Force-measuring device and reference unit
- Patent Title (中): 力测量装置和参考单元
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Application No.: US11846151Application Date: 2007-08-28
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Publication No.: US07690273B2Publication Date: 2010-04-06
- Inventor: Daniel Reber , Hans-Rudolf Burkhard
- Applicant: Daniel Reber , Hans-Rudolf Burkhard
- Applicant Address: CH Greifensee
- Assignee: Mettler-Toledo AG
- Current Assignee: Mettler-Toledo AG
- Current Assignee Address: CH Greifensee
- Agency: Buchanan Ingersoll & Rooney PC
- Priority: EP06120100 20060905
- Main IPC: G01L1/12
- IPC: G01L1/12

Abstract:
The force-measuring device includes a measuring unit and a reference unit, the latter serving to deliver a reference quantity, a reference current (IREF) or a reference voltage (UREF), through which the force (FMO) of a measurement object which is to be determined can be measured by the measuring unit. The reference unit is a force-measuring device which is loaded with a reference mass and which in accordance with the principle of electromagnetic force compensation generates a reference current (IREF) that can be regulated through a measuring- and regulating device in such that in a first reference coil which is held by a reference lever, the reference current (IREF) generates a magnetic field which cooperates with the magnetic field of a reference magnet. Through this cooperation a magnetic force is brought to bear on the reference lever. As a result, the force (FREF) of the reference mass which is likewise acting on the reference lever can be compensated by said magnetic force.
Public/Granted literature
- US20080053249A1 FORCE-MEASURING DEVICE AND REFERENCE UNIT Public/Granted day:2008-03-06
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