Temperature measurement device and measurement method
US7775711B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 12, 2008 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Dec 12, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K7/21
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An exemplary temperature measurement device includes a reference voltage source, a three-wire thermal resistor, a voltage drop amplifier, an operational amplifier and compensation resistors. By using connecting wires with resistance values of the compensation resistors, a relation between an output signal and a resistance of the thermal resistor gives rise to a monotonous function, which is independent of the resistances of the connecting wires. After A/D conversation of an output signal, the resistance of the thermal resistor and a temperature can be calculated based on known functions. Therefore, within an entire measurement range and any length of cable, an influence of the wire resistances can be compensated without switches or jumpers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.