Radar Level Gauge Safety Device Integration
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Solution Overview
Problem
Existing radar fill level measuring devices with integrated safety devices require additional mounting options for further sensors, increasing the system's susceptibility to failure and compromising tightness, especially in safety-critical applications.
Innovation Solution
Integration of an additional sensor within the safety device of the radar fill level measuring device, which includes an adjustment device to position a reflector or reduction device, allowing for reduced reflection of electromagnetic waves, and optionally includes a capacitive, vibration, or ultrasonic sensor to provide redundancy and monitor critical fill levels without additional fastening arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional sensors are provided for detecting fill level or limit level to create redundancy, then measurement reliability is improved, but the number of mounting options and susceptibility to failure increases
Solution Approach 1:
The patent combines the additional sensor with the safety device's reflector assembly, integrating multiple functions (safety reflection and redundant sensing) into a single structural unit. This eliminates the need for separate mounting arrangements while providing both safety functionality and measurement redundancy.
Solution Approach 2:
The safety device is designed to serve multiple purposes: it acts as a reflector for safety testing and simultaneously houses additional sensors for redundant fill level detection. This multi-functionality reduces the overall number of components and mounting points required in the system.
2Reliability
If additional sensors are mounted separately to provide redundancy, then measurement reliability is improved, but system tightness and susceptibility to failure worsen
Solution Approach 1:
By integrating the additional sensor into the safety device assembly, the patent reduces the number of separate mounting points and potential leakage paths. The combined structure maintains better system tightness while providing redundant measurement capability.
3Ease of operation
If manual reflector placement is used for safety testing, then functionality check is possible, but operation complexity and time consumption increase
Solution Approach 1:
The patent incorporates a movable reflector mechanism within the safety device that can be positioned in advance to the correct location. This eliminates the need for manual reflector placement during each safety test, reducing operational complexity and time consumption.
Solution Approach 2:
The safety device includes a movable reflector that can be dynamically positioned between different locations (inside and outside the beam path) to facilitate automated or semi-automated safety testing, improving operational efficiency compared to static manual placement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration eliminates the need for extra fastening options, enhances measurement reliability by providing redundant data, and ensures continued operation even if the primary radar device fails, while maintaining a sealed system for safety-critical applications.
Implementation Method 1
an antenna (3) for radiating electromagnetic waves into a container (4) and for receiving reflected electromagnetic waves from the container
Implementation Method 2
A fill level inside the container can then be determined on the basis of a time difference between the transmission of the electromagnetic signal and the reception of the reflected electromagnetic signal
Implementation Method 3
the safety device has a reflector (7) and is designed to position the reflector (7) at least between a first position in which the reflector (7) reflects the electromagnetic waves
Implementation Method 4
an absorbent material or a diffuser can be used as a reduction device, through which the reflector is covered or shadowed from the perspective of the antenna and as a result only reflects the emitted electromagnetic waves to a reduced extent
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a radar level gauge (1) comprising a signal generator for generating electromagnetic waves and an antenna (3) for emitting the electromagnetic waves in a container (4) and for receiving electromagnetic waves reflected by the container (4). The radar level gauge also comprises a safety device (5) for verifying the functional capability or for improving the measuring quality of the radar level gauge (1), said safety device (5) having a reflector (7) and an adjustment device (9) and/or a reduction device (15) and being suitably designed to adjust the reflector (7) and/or the reduction device (15) at least between a first position (I), in which the reflector reflects the electromagnetic waves and a second position (II), in which the reflector reflects the electromagnetic waves in a reduced manner. The safety device also has at least one additional sensor (11) for detecting a measured variable in the container (4).