Distance Measurement Using Mutual Time Difference Feedback
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Solution Overview
Problem
Existing distance measurement technologies based on Time Of Flight (TOF) face inaccuracies due to time differences caused by computing resource limitations in devices, leading to errors in determining the distance between devices.
Innovation Solution
A method and device for measuring distance by sending detection signals between two devices, determining time differences for both devices, and calculating the distance based on these time differences, thereby accounting for resource-induced time differences and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional TOF-based distance measurement is used, then the measurement process is simple, but the measurement precision deteriorates due to time differences caused by computing resource limitations
Solution Approach 1:
The patent applies feedback by having each device measure and report its own processing time difference for the detection signal. The first device obtains both the first time difference (its own processing time) and the second time difference (from the second device). This mutual feedback mechanism allows both devices to account for their respective computing resource delays, thereby improving measurement precision while maintaining relative simplicity in the overall process.
2Measurement precision
If time differences caused by computing resources are ignored, then the measurement process is faster, but the measurement precision deteriorates
Solution Approach 1:
The patent applies preliminary action by having each device pre-measure and store its own processing time difference before the actual distance measurement. The first device measures its first time difference and the second device measures its second time difference in advance. This preliminary measurement of processing delays allows the final distance calculation to account for these time differences without adding significant delay to the overall measurement process, as the time difference values are already prepared and can be directly used in the calculation.
3Measurement precision
If accurate time difference determination is implemented, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The patent applies self-service by having each device independently measure and report its own processing time difference without requiring complex external timing systems. The first device measures its first time difference using its own internal timing resources, and the second device measures its second time difference using its own internal timing resources. This self-service approach simplifies the overall system complexity while achieving accurate time difference determination, as each device uses its own straightforward timing mechanism rather than requiring a complex synchronized external system.
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
The proposed method enhances the accuracy of distance measurement by accurately accounting for time differences caused by resource limitations, thereby improving the reliability of distance calculations in various applications, such as unmanned vehicles and indoor positioning.
Implementation Method 1
there are many ways to measure the distance between devices based on the Time Of Flight (TOF) of the signal
Data Source
AI summary
The present disclosure is related to a method and device for measuring a distance and a storage medium. The method for measuring the distance includes determining a distance between a first device and a second device based on a first time difference and a second time difference, where the first time difference is between a time of receiving a first detection signal by the first device and a time of receiving a second detection signal by the first device, and the second time difference is between a time of receiving the first detection signal by the second device and time of receiving the second detection signal by the second device.