Fast response capacitive gauging system featuring steep slope filter discrimination circuit
US9267975B2 · kind B2 · utility
0Cited by
9References
12Claims
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Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Feb 23, 2016 |
| Priority date | — |
| Expiry date | Sep 4, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C66/95
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The high speed, high accuracy capacitive gauging system employs an oscillator fed through steep slope filter that is discriminates between very small changes in capacitance even in the presence of electrical noise. During intervals when the probe tip is retracted, the oscillator frequency is calibrated to match the sweet spot in the center of the linear operative region of the steep slope filter. This calibrates the system to overcome the effects of varying temperature and humidity in the manufacturing environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.