External force measuring apparatus
US6199020A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1998 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Jun 25, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C25/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an external measuring apparatus, a past zero signal value V0 is first read out. A subtracted value obtained by subtracting the zero signal value V0 from a read signal value Vin from an angular velocity detector is compared with a preset first threshold value .DELTA.V1. If no angular velocity is being applied, then the read signal value Vin is updated and set to the zero signal value V0 in which a drift component is canceled. In addition, the subtracted value obtained by subtracting the zero signal value V0 from the read signal value Vin is further compared with a second threshold value .DELTA.V2 so as to perform the zero adjustment of the subtracted value. This makes it possible to eliminate the drift component and the random noise component from the detection signal, enabling accurate angular velocity to be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.