Signal transmission system for machine tools, inspection machines, and the like
US5056235A · kind A · utility
26Cited by
11References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 7, 1989 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Apr 7, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B2210/58
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Probes (18A, 18B, 18C) can be interchangeably mounted in the spindle (12) of a machine tool. Each probe has an optical signal transmission system, in which an optical signal from a light emitting diode (24) is transmitted to a receiving photodiode (26). To prevent interference between the different probe signals, each probe modulates the emitted light at a different carrier frequency. The receiver (28) contains electronic bandpass filters to separate out the different carrier frequencies. The signal information is encoded onto the optical signal by phase modulation of the carrier frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.