MEASURING ARRANGEMENT AND TEMPERATURE-MEASURING METHOD, AND SENSOR CABLE FOR SUCH A MEASURING ARRANGEMENT

摘要

A temperature measurement is performed using a sensor cable. The measuring arrangement has a first signal conductor, a feed unit for feeding a measurement signal into the signal conductor, and an analyzing unit which ascertains and analyzes a change in the signal transit time of the measurement signal as a result of a temperature-induced change in a first temperature-dependent dielectric constant and is configured to derive a temperature signal from the ascertained signal transit time. The first signal conductor together with a second signal conductor forms the sensor cable, and each of the two signal conductors is surrounded by an insulation which is made of a first material that has a first dielectric constant in the first signal conductor and which is made of a second material that is different from the first material and has a second dielectric constant in the case of the second signal conductor.

主权项

1. A measuring configuration for temperature measurement, the measuring configuration comprising:
a sensor cable having a first signal line and a second signal line, said first and second signal lines each being surrounded by an insulation, said insulation of said first signal line being made of a first material with a first temperature-dependent dielectric coefficient, said insulation of said second signal line being made of a second material being different from the first material and having a second dielectric coefficient; an injection unit for injecting a measurement signal into said sensor cable, said injection unit configured for a parallel injection of the measurement signal into said first and second signal lines; and an evaluation unit for ascertaining and evaluating a change in a signal transit time of the measurement signal as a result of a change in the first temperature-dependent dielectric coefficient resulting from temperature, and for a derivation of a temperature signal from the signal transit time that has been ascertained, and said evaluation unit configured for evaluating a transit time difference of the measurement signal that is injected into said first and second signal lines.