Laser Rangefinding Signal Verification for Accurate Single-Shot Distance
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Solution Overview
Problem
Current laser ranging technologies suffer from errors that lead to low efficiency, often requiring multiple measurements to achieve accurate results.
Innovation Solution
A laser ranging apparatus and method that utilizes a processor, first and second pulse generators, a mixer, and a laser transceiver module to generate and verify intermediate frequency signals, allowing for accurate distance calculation by ensuring the target intermediate frequency signal meets verification criteria before finalizing the measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If laser ranging is performed using conventional methods, then the ranging process is simple and fast, but the measurement accuracy is low and errors occur frequently
Solution Approach 1:
The patent applies preliminary action by generating a reference intermediate frequency signal before the actual ranging measurement. This reference signal is created by mixing the first pulse signal with the second pulse signal in advance, allowing the system to have a baseline for comparison that improves measurement accuracy without adding significant complexity to the core ranging function
Solution Approach 2:
The patent implements feedback by verifying the target intermediate frequency signal against the reference intermediate frequency signal. The processor compares the target signal (obtained from the measured object) with the pre-established reference signal, and only accepts the measurement when verification succeeds, thereby ensuring high accuracy while maintaining efficient operation through automated validation
2Reliability
If multiple measurements are performed to ensure accuracy, then the measurement reliability improves, but the time consumption increases and efficiency decreases
Solution Approach 1:
By preparing the reference intermediate frequency signal in advance through mixing the first and second pulse signals, the system establishes a validation baseline before actual measurement. This preliminary preparation enables single-shot accurate measurement with verification, eliminating the need for multiple repeated measurements and reducing time loss while maintaining high reliability
Solution Approach 2:
The verification mechanism provides immediate feedback on measurement validity by comparing the target intermediate frequency signal with the reference signal. This feedback loop ensures high reliability by accepting only verified measurements, while avoiding time-wasting repeated measurements through automated error detection and rejection
3Measurement precision
If verification of intermediate frequency signals is implemented, then the measurement accuracy improves, but the processing complexity increases
Solution Approach 1:
The reference intermediate frequency signal is generated in advance by mixing the first pulse signal with the second pulse signal, creating a pre-computed baseline for verification. This preliminary action simplifies the verification process during actual measurement, as the system only needs to compare against the pre-existing reference rather than perform complex real-time calculations, thus improving accuracy without significantly increasing processing complexity
Solution Approach 2:
The verification process uses feedback by comparing the target intermediate frequency signal with the reference signal through logical operations. This feedback mechanism improves measurement precision through automated validation while keeping processing complexity manageable through efficient bitwise comparison operations that can be performed rapidly by the processor
Data Source
AI summary
This application provides a laser ranging apparatus, a rangefinder and a ranging method. The apparatus includes a processor, a first pulse generator, a second pulse generator, a mixer, and a laser transceiver module; the processor controls the first pulse generator to output a first pulse signal and controls the second pulse generator to output a second pulse signal; the mixer is configured to combine the first and second pulse signals to generate a reference intermediate frequency signal; the laser transceiver module is configured to emit a laser pulse toward a measured object based on the first pulse signal and obtain a target intermediate frequency signal for distance calculation based on the first and second pulse signals and a measurement pulse signal; the processor verifies the target intermediate frequency signal according to the reference intermediate frequency signal and calculates a distance to the measured object using verified target intermediate frequency signal.