THE ANALOG SIGNAL PROCESSING IN MEASURING SYSTEMS WITH A SINGLE PASSIVE SENSOR
Abstract
The quality of a measuring system depends more and more on the first stages of the measuring chain i.e. the sensor and the primary signal conditioning circuit. The use of a high resolution A/D converter at the very beginning of that chain is generally correct. In practice however, sensors are mainly analogue and they need some analogue signal conditioning circuits. The paper deals with the analogue signal processing in the circuits with a single passive sensor. Uncertainty, error elimination and a nonlinearity of some essential structures have been analysed. The general conclusions may be formulated as follows: Extremely simple methods of analogue signal processing lead to quite good results but some limitations have to be respected. The passive sensor parameter which determines almost all limitations is the ratio Ä<i>R</i><sub>X</sub> / <i>R</i><sub>0</sub>.
Event details
- Event
- XVI IMEKO World Congress
- Place
- Vienna, AUSTRIA
- Time
- 25 September 2000 - 28 September 2000