Auto-calibrating wheel balancer force transducer
US8886491B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 27, 2011 |
| Grant date | Nov 11, 2014 |
| Priority date | — |
| Expiry date | Jan 25, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L25/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for carrying out auto-calibration of one or more piezoelectric elements in a force transducer assembly of a vehicle wheel balancing system. Output electrical signals from the piezoelectric transducers in response to application of a known imbalance force are measured and recorded. Subsequently, during an auto-calibration procedure, a known input signal is selectively applied to at least one piezoelectric element in the force transducer assembly, and at least one output electrical signal is received from the force transducer assembly. The obtained auto-calibration output signals are evaluated with respect to the output signals obtained from a previous auto-calibration, and compensation values are derived there from for application to subsequent output signals obtained during imbalance measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.