Range-Finding Method Using Dual Communication Technologies
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Solution Overview
Problem
Current range-finding methods face challenges in accurately measuring distances due to signal attenuation and interference, especially at larger distances, and require signal reflection, which decreases measurement frequency and reliability.
Innovation Solution
A range-finding method that uses different communication technologies for transmitting a check code and a modulated signal, allowing for distance calculation without signal reflection, enhancing measurement frequency and reliability by evaluating range-finding confidence based on check codes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reflection-based range-finding method is used, then distance measurement can be achieved, but measurement frequency decreases significantly with increase of measured distance
Solution Approach 1:
The patent inverts the traditional reflection-based range-finding approach by having the receiving terminal actively transmit a response signal back to the transmitting terminal. Instead of waiting for passive reflection, the system uses active response transmission, which significantly improves measurement frequency while maintaining distance measurement accuracy.
Solution Approach 2:
The patent introduces a response signal as an intermediary mechanism between the transmitting and receiving terminals. The receiving terminal generates and transmits this response signal, which serves as a reliable marker for calculating round-trip time, thereby improving measurement frequency and reliability compared to passive reflection methods.
2Area of stationary object
If detection signal is transmitted at excessively large field angle, then coverage area increases, but signal power attenuates faster with increase of distance
Solution Approach 1:
The patent merges multiple communication technologies (first and second communication technologies) to transmit different types of information (check codes and modulated signals). This combination allows the system to maintain reliable signal transmission over distance while preserving measurement accuracy, effectively resolving the trade-off between coverage and signal reliability.
Solution Approach 2:
The patent implements a feedback mechanism where the receiving terminal transmits a response signal containing a check code back to the transmitting terminal. This feedback allows for verification of signal integrity and accurate calculation of round-trip time, maintaining measurement reliability even when signals traverse large distances.
3Measurement precision
If reflection-based range-finding is used, then distance can be measured, but it is difficult to accurately identify the received signal
Solution Approach 1:
The patent introduces check codes as intermediary verification elements. The transmitting terminal embeds a check code in the outgoing signal, and the receiving terminal returns the same check code in its response signal. This intermediary mechanism allows the transmitting terminal to verify signal integrity and accurately identify the returned signal, resolving the difficulty of signal identification in reflection-based methods.
Solution Approach 2:
Instead of relying on passive signal reflection that is difficult to identify, the patent inverts the approach by having the receiving terminal actively return a signal that explicitly contains the original check code. This active return with verification makes signal identification straightforward and reliable.
Data Source
AI summary
A range-finding method, a apparatus, a terminal system, and a computer-readable storage medium are provided. The range-finding method includes: transmitting a first check code from a transmitting terminal to a receiving terminal by using a first communication technology; transmitting a modulated signal from the transmitting terminal to the receiving terminal by using a second communication technology different from the first communication technology, where the modulated signal carries a second check code; acquiring a first moment at which the modulated signal is transmitted and a second moment at which the modulated signal is received; demodulating the second check code in the modulated signal; acquiring a range-finding confidence according to the first check code and the demodulated second check code; and acquiring a measured distance between the transmitting terminal and the receiving terminal according to the first moment, the second moment, a transmission speed of the modulated signal, and the range-finding confidence.