Measuring and testing – Specimen stress or strain – or testing by stress or strain... – Specified electrical sensor or system
Patent
1996-06-07
1998-07-07
Chilcot, Richard
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
Specified electrical sensor or system
73763, 73774, 73855, G01L 116
Patent
active
057772355
ABSTRACT:
In a measuring arrangement comprising a strain gage section (10) constructed of at least one SG (strain gage) (15), and integrated in a measurement pickup (1), an additional circuit (20) amplifies modulated output signals of the SG section (10), and is also integrated in the measurement pickup (1). The measuring arrangement thus obtained is used for general measuring tasks, particularly for commercially available domestic or industrial scales including weighing devices operated by means of commercially available batteries. As an additional circuit, a modulation amplifier can be used which consists of a modulator constructed as squarewave generator, an alternating-voltage amplifier and a demodulator, the demodulator being a bridge rectifier composed of four electronic (on/off) switches or two electrical changeover switches.
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Chilcot Richard
McCall Eric S.
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