Centering device and method for centering
US5777562A · kind A · utility
Inventor
Key dates
| Filing date | Aug 19, 1996 |
| Grant date | Jul 7, 1998 |
| Priority date | — |
| Expiry date | Aug 19, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/312
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A centering device and method includes a sensor for sensing the center of a bore preformed in a workpiece, and a remote output unit for outputting the positional signal generated by the sensor. The sensor in held within a spindle of a machine tool and includes a stylus which contacts the inner surface of the bore, a local oscillator and modulator and an RF oscillator and antenna. The stylus oscillates a linear proximity sensor. The proximity sensor outputs a proportional DC voltage which is input to a voltage controlled oscillator (VCO) which outputs a square-wave with a frequency which is a function of the stylus position. The RF oscillator and antenna includes a radio transmitter and antenna and receives the square-wave output of the VCO, converts the square-wave to a modulated RF signal and transmits the modulated RF signal to the remote output unit. The remote output unit includes an RF receiver and demodulator, and a signal processor and output and display. The RF receiver and demodulator includes an antenna for receiving the modulated RF signal and a radio receiver and demodulator which outputs a demodulated square-wave. The signal processor and output display includes a two-…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.