Universal Water Level and Flow Speed Radar Sensor
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Solution Overview
Problem
Current measurement systems for water monitoring are often bulky and influenced by environmental factors like temperature, wind, and rain, making them less effective for accurately determining water level and flow speed.
Innovation Solution
A compact fill level measurement device using a signal generator module, antenna arrangement, and processor unit to emit and evaluate transmission signals in multiple directions, employing frequency or amplitude modulation to determine distance and flow speed with minimal environmental interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radar technology is used for water level measurement, then measurement precision is improved and environmental influence is reduced, but device complexity increases
Solution Approach 1:
The patent combines multiple measurement functions (distance measurement via FMCW radar and flow speed measurement via Doppler effect) into a single integrated measurement device. The antenna arrangement serves dual purposes: emitting distance measurement signals and receiving reflected signals for both distance and velocity determination, thereby reducing the need for separate measurement systems while maintaining high precision
Solution Approach 2:
The measurement device is designed with multi-functionality to perform both distance measurement (for water level) and flow speed measurement using the same radar technology platform. The processor unit evaluates multiple signal characteristics (time delay for distance, frequency shift for velocity) from the same transmitted and received signals, making the device universally applicable for comprehensive water monitoring
2Measurement precision
If multiple sensors are used to acquire various measurement data, then measurement precision is improved, but device complexity and bulkiness increase
Solution Approach 1:
The patent merges distance measurement and flow speed measurement capabilities into a single radar-based measurement device. Instead of using separate sensors for water level and flow velocity, the invention uses one antenna arrangement that transmits and receives signals for both measurement purposes simultaneously, thereby maintaining measurement precision while reducing device complexity and bulkiness
Solution Approach 2:
The single measurement device is designed to universally perform multiple measurement tasks: determining water level through distance measurement and measuring flow speed through Doppler velocity detection. This multi-functional approach eliminates the need for multiple separate sensors and their associated evaluation systems, creating a compact integrated solution
3Measurement precision
If transmission signal is emitted in multiple directions, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The antenna arrangement is segmented into multiple antenna elements that can be independently controlled to emit signals in different directions. This segmentation allows the system to transmit signals both perpendicular to the flow direction (for accurate velocity measurement via Doppler effect) and in other orientations, thereby improving measurement precision while managing complexity through modular antenna design
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
Enables accurate and efficient simultaneous measurement of water level and flow speed with reduced environmental influence, using a single measurement cycle and adaptable antenna configurations for optimal orientation.
Implementation Method 1
The signal generator module is used to generate the transmission signal, which has an amplitude modulation or a frequency modulation during a first time interval
Implementation Method 2
a free-radiating measurement device for determining a distance from a medium, from which the level of the medium can then be determined, and a flow speed of the medium by evaluating a transmission signal emitted by the measurement device and reflected by the medium
Implementation Method 3
an antenna arrangement which can emit the signal at least in a first direction oblique to the flow direction of the medium
Data Source
AI summary
In order to determine a level and the flow speed of a medium, FMCW transmission signals and CW transmission signals are emitted alternately. Using the Doppler effect, the flow speed of the medium can be determined from the reflected CW signal. The level is determined from the reflected FMCW signal.