Patent ID: 9702750
Date: 2017-07-11
CPC Classifications: G01F,G01S

Claim:
1. A material level indicator, for measuring a material level in a container, comprising: a probe, including a first end and a second end opposite to the first end; a plurality of first signal compensating units, installed at the first end, and having a first spacing distance defined between two adjacent first signal compensating units; a plurality of second signal compensating units, installed at the second end, and having a second spacing distance defined between two adjacent second signal compensating units; and a controlling module, disposed at the first end, and comprising: a signal processor; a signal emitter, electrically coupled to the signal processor, for generating an electromagnetic signal, and the electromagnetic signal being transmitted from the first end to the second end; and a signal receiver, electrically coupled to the signal processor; wherein, the first signal compensating units reflect the electromagnetic signal, and the signal receiver receives the electromagnetic signal reflected by the first signal compensating units and transmitted to the signal processor to generate a first travel time difference, and the signal processor corrects an environmental coefficient according to the first travel time difference, and the second signal compensating units reflect the electromagnetic signal, and the signal receiver receives the electromagnetic signal reflected by the second signal compensating units and transmitted to the signal processor to generate a second travel time difference, and the signal processor detects a dielectric coefficient of the material according to the second travel time difference.