Level-measuring device
AssigneeEndress + Hauser GmbH + Co. KG
InventorsWolfram Lütke, Bernhard Michalski
Life of this patent
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Abstract
This invention relates to a level-measuring device in which a signal generating device, a sampling device and a transmitting and/or receiving device are optimally connected to one another for various applications and signal shapes. The signal generating device generates both a radio-frequency transmit signal and a sampling control signal for sampling the radio-frequency signal. The sampling device, the signal generating device and the transmitting and/or receiving device being connected by a coupling device which comprises one of: a transformer; at least one line node; a λ/4 coupler and a circulator.
Claims23
A level-measuring device for determining the level of a medium in a container, comprising:
- a signal generating device for generating both a radio-frequency transmit signal and a sampling control signal for sampling the radio-frequency signal;
- a transmitting and/or receiving device;
- a sampling device, controlled by said sampling control signal, for sampling the radio-frequency signal;
- and a coupling device for electrically coupling said signal generating device, said transmitting and/or receiving device and said sampling device, wherein said coupling device comprises a transformer.
A level-measuring device for determining the level of a medium in a container, comprising:
- a signal generating device for generating both a radio-frequency transmit signal and a sampling control signal for sampling the radio-frequency signal;
- a transmitting and/or receiving device;
- a sampling device, controlled by said sampling control signal, for sampling the radio-frequency signal;
- and a coupling device for electrically coupling said signal generating device, transmitting and/or receiving device and said sampling device, wherein said coupling device comprises at least one line node.
A level-measuring device for determining the level of a medium in a container, comprising:
- a signal generating device for generating both a radio-frequency transmit signal and a sampling control signal for sampling the radio-frequency signal;
- a transmitting and/or receiving device;
- a sampling device, controlled by said sampling control signal, for sampling the radio-frequency signal;
- and a coupling device for electrically coupling said signal generating device, said transmitting and/or receiving device and said sampling device, wherein said coupling device comprises a λ/4 coupler.
The level-measuring device for determining the level of a medium in a container, comprising:
- a signal generating device for generating both a radio-frequency transmit signal and a sampling control signal for sampling the radio-frequency signal;
- a transmitting and/or receiving device;
- a sampling device, controlled by said sampling control signal, for sampling the radio-frequency signal;
- and a coupling device for electrically coupling said signal generating device, said transmitting and/or receiving device and said sampling device, wherein said coupling device comprises a circulator.
Dependencies are inferred from the claim text.