Title:
LOAD CELL WITH ROBERVAL STRUCTURE HAVING ANTI-OFFSET FUNCTION, AND WEIGHING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/096028
Kind Code:
A1
Abstract:
The present invention provides a load cell with a Roberval structure having an anti-offset function, and a weighing device. The load cell comprises: an elastic element and a plurality of strain detection elements, the strain detection elements being mounted on the elastic element; the elastic element comprises: a loading portion for receiving a load from a connector, a fixing portion for fixing the elastic element, a strain generation portion for converting the load into deformation, and a parallel guide beam for transferring the load and keeping the loading portion translational when loaded; the strain generation portion is composed of at least one hollow cavity body, the loading portion and the fixing portion are respectively located on left and right sides of the strain generation portion, and the parallel guide beam is located at upper and lower portions of the strain generation portion; and the centre of rotation and the geometric centre of the strain generation portion coincide when the load cell with the Roberval structure is loaded. The load cell and the weighing device of the present invention can effectively compensate a non-linear offset error. By adjusting the stiffness of upper and lower beams of the elastic element, the non-linear offset error is compensated from the aspect of mechanical structure design.
Inventors:
LIN HONGZHI (CN)
XU LEI (CN)
YANG LI (CN)
XU LEI (CN)
YANG LI (CN)
Application Number:
PCT/CN2021/139956
Publication Date:
May 12, 2022
Filing Date:
December 21, 2021
Export Citation:
Assignee:
METTLER TOLEDO CHANGZHOU PREC INSTRUMENTS LTD (CN)
METTLER TOLEDO CHANGZHOU MEASUREMENT TECHNOLOGY LTD (CN)
METTLER TOLEDO INT TRADING SHANGHAI CO LTD (CN)
METTLER TOLEDO CHANGZHOU MEASUREMENT TECHNOLOGY LTD (CN)
METTLER TOLEDO INT TRADING SHANGHAI CO LTD (CN)
International Classes:
G01G3/14; G01G21/24
Foreign References:
| JP2006047118A | 2006-02-16 | |||
| JP2005331459A | 2005-12-02 |
Attorney, Agent or Firm:
SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)
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