Filling level gage
AssigneeEndress + Hauser GmbH + Co. KG
InventorsRoland Müller, Wolfram Lütke
Life of this patent
Estimating the term…
Abstract
A filling level gage operating with microwaves, for measuring a filling level of a filling material (5) in a container (1), is provided which functions with a single antenna (7) constructed as simply as possible, and in which a minimum distance required for measurement between the filling material (5) and the antenna (7) is as small as possible, having a microwave generator (9), and an antenna (7) with planar antenna structure, which is used to transmit the microwaves in the direction of the filling material (5) and to receive microwaves reflected from a filling material surface, in which the planar antenna structure has at least two transmission and/or reception elements (11, 13, 33, 35, 37, S, E).
Claims14
A filling level gage operating with microwaves, for measuring a filling level of a filling material in a container, having:
- a microwave generator, and
- an antenna with planar antenna structure which is used to transmit the microwaves in the direction of the filling material and to receive microwaves reflected from a filling material surface, said planar antenna structure has at least two transmission and/or reception elements, and said transmission and/or reception elements are arranged interleaved.
A filling level gage operating with microwaves, for measuring a filling level of a filling material in a container, having:
- a microwave generator, and
- an antenna with planar antenna structure, which is used to transmit the microwaves in the direction of the filling material and to receive microwaves reflected from a filling material surface, said planar antenna structure has at least two transmission and/or reception elements, and wherein in order to measure a filling level at a far range in front of the antenna, all the transmission and/or reception elements are used as transmitters and as receivers.
A filling level gage operating with microwaves, for measuring a filling level of a filling material in a container, having:
- a microwave generator, and
- an antenna with planar antenna structure, which is used to transmit the microwaves in the direction of the filling material and to receive microwaves reflected from a filling material surface, said planar antenna structure has at least two transmission and/or reception elements, and wherein at least one transmission and/or reception element is used exclusively as a transmitter and the remaining transmission and/or reception elements are used exclusively as receivers, and wherein a differential signal is established which corresponds to the difference between the transmission signals applied to the transmitters and the reception signals received by the receivers.
Dependencies are inferred from the claim text.