Design of a Load Cell with Large Overload Capacity
Load cells (force sensors) are fragile devices. Commercially available load cells generally have an overload capacity up to one and a half times full-scale range. Exceeding this limit damages the sensor structure. This load cell provides large overload protection capacity without compromising the sensitivity or affecting the characteristics of the sensor. A special design feature is that it becomes virtually rigid after the sensor flexures reach their maximum deflection.
This sensor features high stiffness and good extraneous load rejection that makes it ideal for robotic laboratories. It is mainly for the single-point load cell type.
Commercial load cells are widely used in the aerospace, agriculture, automotive, aviation, construction, forestry, freight transportation, maritime, mining, and waste management markets. These devices are embedded in industrial-weighing and materials-handling equipment in dynamic and stationary weighing systems, load-handling and moving systems, measurement devices, instrumentation, and operations control and information systems.
The Business Opportunity
The overload capacity of the commercial load cell is not high enough for many industrial and laboratory applications. Therefore, in practice, an oversized sensor is used to increase the margin of overload safety. However, the larger sensors are usually less accurate.
This invention has an overload capacity several times that of a sensor. This is its competitive advantage. It could ensure that sensors will not break when overloaded and that load cells do not require recalibration or replacing after overload testing.
Technology Transfer Details
A commercialization license for this technology is available.
The business opportunity may be referred to by its CSA case ID: 50705
- Aghili, F., "Automated Rendezvous & Docking (AR&D) Without Impact Using a Reliable 3D Vision System," American Institute of Aeronautics & Astronautics (AIAA), Guidance, Navigation and Control Conference, Toronto, Canada, pp. 7602.1-11, August 2-5, 2010.
- Aghili, F., "A Reconfigurable Robot with Telescopic Links for In-Space Servicing," American Institute of Aeronautics & Astronautics (AIAA), Guidance, Navigation and Control Conference, Toronto, Canada, pp. 8021.1-11, August 2-5, 2010.
- Aghili, F., "Cartesian Control of Space Manipulators for On-Orbit Servicing," American Institute of Aeronautics & Astronautics (AIAA), Guidance, Navigation and Control Conference, Toronto, Canada, pp. 7846.1-11, August 2-5, 2010.
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