Importance

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Abstract

Device for conversion of a nonelectrical quantity into an electrical signal comprises measuring and compensating bridge circuits whose supply arms are connected to a power supply. A nonelectrical quantity like strain, force or pressure acts on the input of the measuring bridge circuit whose output is coupled to the input of a measuring circuit. The effect of destabilizing factors, such as temperature, electromagnetic field or aging of device components, is reduced by a suitable compensating bridge circuit whose output is connected to the input of a correction circuit. The measuring bridge circuit is one arm of the compensating bridge circuit. The correction circuit has differential outputs coupled to adjustable dividers whose number is equal to the number of compensating couplings introduced. Outputs of the dividers are connected to a displacement unit and to a device functional characteristic scaling circuit. The device also comprises an adjustable bridge circuit to compensate nonlinearity of the device functional characteristic and a unit for changing the steepness of said functional characteristic.

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First Claim