Level gauge

The radar-based level measuring device achieves a compact and modular design by using a spring-loaded, galvanically isolated high-frequency module connection within the gauge neck, addressing space constraints and interference issues.

DE102020133194B4Active Publication Date: 2026-05-21ENDRESS & HAUSER GMBH & CO KG
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Patent Information

Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
ENDRESS & HAUSER GMBH & CO KG
Filing Date
2020-12-11
Publication Date
2026-05-21

AI Technical Summary

Technical Problem

Existing radar-based level gauges face challenges in achieving a compact and modular design due to limited space in the gauge neck, and maintaining a secure, interference-free connection between the high-frequency module and antenna array, which is crucial for explosion protection and thermal decoupling.

Method used

A radar-based level measuring device with a high-frequency module encapsulated in an electronics unit, connected via a waveguide segment, is preloaded against a device housing using a spring element to ensure a gap-free and interference-free connection, facilitated by a galvanic isolation mechanism.

Benefits of technology

The solution allows for a compact design, reduces RF interference, and ensures reliable signal transmission while meeting explosion protection and thermal decoupling requirements.

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Abstract

Radar-based level measuring device for determining the level (L) of a fill material (2), comprising the following components: - An antenna arrangement (10) controllable via a high-frequency connection (100), ◯ by means of which each a radar signal (S HF ) the contents (2) can be sent out, and ◯ by means of which, after reflection of the radar signal (S HF ) a receiving signal (R) is received at the surface of the filling material. HF ) is receivable, - a high-frequency module (11, 12, 120), with ◯ a transmit / receive unit (11) designed to receive the radar signal (S HF ) to generate, and to determine, after its reflection at the surface of the contents, based on the corresponding received signal (R) HF ) to determine the fill level (L), with ◯ an electronic encapsulation (12) in which the transmit / receive unit (11) is arranged, and with ◯ a second waveguide segment (120) for transmitting the radar signals (S HF , R HF ) is connected to the transmit / receive unit (11) in such a way that the second waveguide segment (120) is led out of the electronic encapsulation (12), - a device housing (13) connected to the antenna arrangement (10), in which the high-frequency module (11, 12, 120) is arranged, and - a spring element (130, 133) by means of which the high-frequency module (11, 12, 120) is pre-tensioned against the device housing (13) in such a way that the waveguide segment (120) is pressed with a corresponding force in the direction of a common waveguide axis (a) against the high-frequency connection (100).
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