US 12,222,254 B2
Sensor assembly, force detection device and method, and construction machinery
Yanbin Liu, Changsha (CN); Jie Wen, Changsha (CN); Lunwen Guo, Changsha (CN); Ling Fu, Changsha (CN); and Kaige Jiang, Changsha (CN)
Assigned to ZOOMLION HEAVY INDUSTRY SCIENCE AND TECHNOLOGY CO., LTD., Changsha (CN)
Appl. No. 17/789,432
Filed by ZOOMLION HEAVY INDUSTRY SCIENCE AND TECHNOLOGY CO., LTD., Changsha (CN)
PCT Filed Jul. 3, 2020, PCT No. PCT/CN2020/100180
§ 371(c)(1), (2) Date Jun. 27, 2022,
PCT Pub. No. WO2021/128798, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 201911381561.X (CN), filed on Dec. 27, 2019.
Prior Publication US 2023/0054665 A1, Feb. 23, 2023
Int. Cl. G01L 1/22 (2006.01)
CPC G01L 1/2218 (2013.01) [G01L 1/2231 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A sensor assembly, comprising a connecting part used for connecting a base to be tested and a bearing part used for bearing, wherein the bearing part is connected to the connecting part, the bearing part comprises:
a first sensing unit; and
a second sensing unit, wherein the measuring range of the first sensing unit is greater than that of the second sensing unit,
the first sensing unit has a first initial gap b1 from the connecting part,
the second sensing unit has a second initial gap b2 from the connecting part,
the first initial gap b1 is smaller than the second initial gap b2, so that corresponding initial gaps are eliminated when a load applied to the bearing part reaches different extents, and
the sensor assembly further comprises an elastic gasket arranged between the second sensing unit and the connecting part, such that:
when an acting force borne on the bearing part is lower than a preset value, the first initial gap b1 is not eliminated and the first sensing unit does not contact the connecting part and the second sensing unit contacts the connecting part via the elastic gasket, and
when the acting force borne on the bearing part reaches a predetermined value higher than the preset value, the first initial gap b1 is eliminated and the second sensing unit contacts the connecting part via the elastic gasket.