MEASURING CIRCUIT

摘要

A measuring circuit comprising
an evaluation circuit (13, 63);a sensing circuit (39, 40) comprising a sensing element (6, 55) configured to generate a measuring signal from a measuring object (7) and a transmission line (26, 69) for transmitting the measuring signal to the evaluation circuit (13, 63); anda test signal injection circuit (21) comprising a signal injector (12) and an injection line (20) connecting a signal output of the signal injector (12) with the sensing circuit (39, 40) for feeding a test signal into the sensing circuit (39, 40) such that the test signal is transmittable to the evaluation circuit (13, 63) over the transmission line (26, 69).;To provide the measuring circuit with an improved surveillance and/or testing operability, the invention suggests that the injection line (20) and the transmission line (26, 69) are interconnected in series via the sensing element (6, 55) such that said test signal can be fed through the sensing element (6, 55).

主权项

1. A measuring circuit comprising
an evaluation circuit; a sensing circuit comprising a sensing element configured to generate a measuring signal from a measuring object and a transmission line for transmitting the measuring signal to the evaluation circuit; and a test signal injection circuit comprising a signal injector and an injection line connecting a signal output of the signal injector with the sensing circuit for feeding a test signal into the sensing circuit such that the test signal is transmittable to the evaluation circuit over the transmission line;wherein the injection line and the transmission line are interconnected in series via the sensing element such that said test signal can be fed through the sensing element.