Ground Positioning Consistency Check Module
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Solution Overview
Problem
Ground-based positioning systems lack the ability to detect erroneous distance values, leading to navigation errors in aviation, as they do not have mechanisms to identify faulty signals or transmitters like satellite-based systems do.
Innovation Solution
A device and method that utilize a transmitting device, receiving device, time-measuring unit, and check module to determine distances from multiple response elements, performing a consistency check using redundant distance measurements to identify and exclude faulty signals, thereby improving positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ground-based positioning systems use multiple response elements for distance measurement, then positioning accuracy is improved, but the ability to detect erroneous distance values deteriorates
Solution Approach 1:
The patent applies preliminary action by performing consistency checks on distance measurements before final positioning is determined. The system evaluates multiple distance values from different response elements and identifies erroneous measurements in advance, preventing them from compromising the final positioning accuracy.
Solution Approach 2:
The patent implements feedback by using the determined position as a reference to validate individual distance measurements. The system continuously compares measured distances against expected distances calculated from the determined position, creating a closed-loop verification process that identifies and excludes erroneous measurements.
2Reliability
If satellite-based systems use RAIM algorithms for signal consistency checking, then navigation safety is improved, but ground-based systems lack equivalent error detection mechanisms
Solution Approach 1:
The patent applies copying by adapting the RAIM algorithm concept from satellite-based systems to ground-based positioning. The system replicates the essential functionality of RAIM by performing statistical consistency checks on distance measurements from multiple ground-based response elements, bringing satellite-level safety to ground-based systems.
Solution Approach 2:
The patent demonstrates universality by creating a positioning system that can operate with multiple response elements and perform consistency checking applicable to various ground-based positioning scenarios. The same algorithmic approach works across different implementations and configurations of ground-based positioning systems.
3Reliability
If redundant distance measurements from multiple response elements are used, then consistency checking is enabled, but system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the positioning function into distinct modules: distance measurement from multiple response elements, consistency checking of these measurements, and final position determination. This modular approach allows the system to process redundant measurements systematically without overwhelming complexity.
Solution Approach 2:
The patent extracts the consistency checking function as a separate, dedicated process that operates independently on the distance measurements before they are used for positioning. This extraction allows the system to validate measurements without complicating the core positioning algorithm.
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 solution enables the detection of incorrect distance values in ground-based positioning systems, enhancing the accuracy of aircraft navigation by identifying and excluding faulty signals, thus improving the overall consistency and safety of positioning.
Implementation Method 1
based on the total delay time between transmission of the signal and reception of the response signal, the speed of light and a response time known delay time
Data Source
AI summary
A device for checking the consistency of a positioning includes: a transmitter, a receiver, a time measuring unit, a distance determining module and a check module. The transmitter emits at least one signal, and the receiver receives at least four response signals from at least four different response elements. A response element receives the at least one signal and, upon receipt, emits a response signal. The time measuring unit determines, for each response signal, a total delay time from a transmission time of the signal and a reception time of the respective signal. The distance determination module determines a distance to the respective response element based on each total delay time, and the check module performs a consistency check of a determination of a position based on distances to the different response elements. With the device, erroneous distance values may be detected in ground-based positioning systems.