Radar Measuring Device with Segmented Sweeps for Average Power Compliance
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Solution Overview
Problem
Radar measuring devices used in process automation often exceed the maximum permissible average RF transmission power, particularly in level measurement technology, making it difficult to comply with regulatory limits.
Innovation Solution
The radar measuring device divides the measurement interval into several consecutive partial measurement intervals, separated by pauses, to reduce the average transmission power below the preset threshold, using a control unit to manage the frequency sweep and sampling frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the radar measurement signal is transmitted continuously during the measurement interval, then the measurement precision is improved, but the average transmission power exceeds the maximum permissible threshold
Solution Approach 1:
The measurement interval is divided into multiple consecutive partial measurement intervals (sub-sweeps), allowing the radar signal to be transmitted in segmented bursts rather than continuously. This segmentation reduces the average transmission power while maintaining measurement precision through software-based reassembly of the complete frequency sweep from the partial intervals.
Solution Approach 2:
The radar measurement signal is transmitted periodically in discrete bursts corresponding to the partial measurement intervals, separated by measurement pauses. This periodic transmission pattern reduces the duty cycle and average power consumption while completing the full frequency sweep over the extended periodic interval.
2Power
If the measurement interval is divided into several partial measurement intervals, then the average transmission power is reduced below the threshold, but the measurement time is increased
Solution Approach 1:
The system dynamically adjusts parameters including the number of partial measurement intervals, the duration of each partial interval, and the length of measurement pauses to optimize the balance between average transmission power and total measurement time. The control unit calculates the required number of partial intervals based on the threshold power and available time budget.
3Productivity
If the frequency sweep is completed in a single measurement interval, then the productivity is improved, but the average transmission power exceeds regulatory limits
Solution Approach 1:
The single continuous frequency sweep is segmented into multiple partial sweeps that are transmitted sequentially with pauses. The control unit manages the segmentation to ensure regulatory compliance while minimizing the total measurement time through efficient software-based reassembly and processing of the partial frequency sweep data.
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 method ensures compliance with maximum permissible average transmission power regulations while allowing for efficient radar system design with slower AD converters and reduced energy storage requirements.
Implementation Method 1
a radar module (102) configured to generate and emit the radar measurement signal during the successive partial measurement intervals
Data Source
Figure 1~3
Figure 4~5
AI summary
Radar measuring device for process automation in industrial or private environments, with a control unit for calculating an average transmission power of a radar measurement signal to be emitted during a measurement interval and dividing the measurement interval into several consecutive partial measurement intervals if the calculated average transmission power is greater than the preset threshold power.