公开(公告)号：US20230280200A1

公开(公告)日：2023-09-07

申请号：US17999520

申请日：2021-04-23

Applicant: Endress+Hauser SE+Co. KG

Inventor： Bernhard Michalski

IPC: G01F23/284 ,  G01F25/20

CPC classification number: G01F23/284 ,  G01F25/20

Abstract: A radar-based, fill-level measurement device for measuring a fill-level of a filling material in a container, the high-frequency unit of which can be checked with regard to its functionality, is designed redundantly and thus comprises two, activatable, high-frequency sources for generating the high-frequency signal and two, activatable receivers for sampling the received signal such that a time-prolonged evaluation signal is generated. As a result, a correspondingly designed diagnosis unit can switch between the active high-frequency source and/or between the active receiver, wherein before and after the switching, a defined property of the evaluation signal, such as a signal amplitude, is ascertained. If the defined property of the evaluation signal changes at least by a defined value as a result of the switching, the high-frequency unit is classified as not functional.

公开(公告)号：US10830629B2

公开(公告)日：2020-11-10

申请号：US15774355

申请日：2016-11-03

Applicant: Endress + Hauser SE+Co. KG

Inventor： Bernhard Michalski

IPC: G01F23/284 ,  G01S13/22 ,  G01S13/88 ,  G01F23/296 ,  G01S7/03 ,  G01F25/00 ,  H01Q1/22

Abstract: A method for determining the fill level of a fill substance located in a container. The method, which is based on the pulse travel time principle, is distinguished by the fact that extra-range echos can be recognized. For this, the method includes two method portions, in which microwave pulses are transmitted in the direction of the surface of the fill substance with different repetition rates in measuring cycles following one after the other. In each method portion, travel times are ascertained. The fill level is ascertained based on the first travel time and/or based on the second travel time, to the extent that they approximately agree. Otherwise, it is assumed that such echo pulses concern extra-range echos. Thus, by means of the method of the invention, it can be assured for pulse radar-based fill-level measurements that extra-range echos do not result in erroneous fill level values.

公开(公告)号：US20200249068A1

公开(公告)日：2020-08-06

申请号：US15774355

申请日：2016-11-03

Applicant: Endress + Hauser SE+Co. KG

Inventor： Bernhard Michalski

IPC: G01F23/284 ,  G01S13/22 ,  G01S13/88

Abstract: A method for determining the fill level of a fill substance located in a container. The method, which is based on the pulse travel time principle, is distinguished by the fact that extra-range echos can be recognized. For this, the method includes two method portions, in which microwave pulses are transmitted in the direction of the surface of the fill substance with different repetition rates in measuring cycles following one after the other. In each method portion, travel times are ascertained. The fill level is ascertained based on the first travel time and/or based on the second travel time, to the extent that they approximately agree. Otherwise, it is assumed that such echo pulses concern extra-range echos. Thus, by means of the method of the invention, it can be assured for pulse radar-based fill-level measurements that extra-range echos do not result in erroneous fill level values.