Dehnungsmeßstreifen-Meßanordnung, Verwendung derselben und Modulationsverstärker für derartige Meßanordnungen

摘要

The proposed measurement device comprises a strain gauge component (10) made up of at least one strain gauge (15) and integrated in a measurement sensor (1). An auxiliary circuit (20) amplifies output signals from the strain gauge component (10) and is similarly integrated in the measurement sensor (1). The measurement device thus created is used for general measurement tasks, in particular for commercially available domestic or industrial scales including battery operated weighing devices. A modulation amplifier, consisting of a modulator in the form of a square-wave generator, an a.c. amplifier and a demodulator, can be used as the auxiliary circuit. The demodulator is a bridge rectifier formed by four electronic (on-off) switches or two electrical two-way switches.