Pulsed Signal Processing for Distance Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current light wave distance measuring techniques face challenges in achieving high accuracy and wide measurement range while minimizing memory capacity and electric power consumption, especially when detecting faint reflected pulsed light without a cube corner reflector, leading to increased processing time and cost.
Innovation Solution
A processing apparatus that combines sampled pulsed signal data at predetermined intervals or converts the signal into a damped oscillation wave form to enhance detection intensity and S/N ratio, allowing for accurate measurement at lower sampling frequencies and reduced data processing loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sampling interval is made shorter to improve measurement accuracy, then measurement precision is improved, but the sampling data amount increases, leading to increased memory capacity requirements and electric power consumption
Solution Approach 1:
The patent combines multiple pulse signals by superimposing them in the time domain. The sampling data from multiple pulses are accumulated and added together, merging the signal information to enhance the overall signal level while maintaining measurement accuracy without requiring proportionally more sampling data points
Solution Approach 2:
The patent utilizes periodic pulse signals and accumulates sampling data from multiple periodic pulses. By processing multiple periods of the pulsed signal and combining their sampling data, the system improves measurement accuracy while managing data quantity through the periodic nature of the signal acquisition
2Measurement precision
If the sampling frequency is increased to improve measurement accuracy, then measurement precision is improved, but processing time increases and electric power consumption increases
Solution Approach 1:
Multiple pulse signals are merged by superimposing their sampling data in the time domain. This combining approach enhances the signal level and improves measurement accuracy without requiring each individual sample to be processed at extremely high frequency, thereby reducing overall processing time
Solution Approach 2:
The system continuously accumulates sampling data from multiple pulses in a continuous process. By maintaining continuous action of accumulating and combining signal data, the system achieves high measurement accuracy without the intermittent processing delays that would increase overall processing time
3Measurement precision
If the sampling frequency is increased to improve measurement accuracy, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges multiple pulse signals by superimposing their sampling data. This approach improves measurement accuracy through signal combination rather than requiring complex high-frequency sampling circuits, thereby reducing device complexity and cost while maintaining precision
Solution Approach 2:
The system changes the parameter approach from high-frequency sampling to multi-pulse accumulation. By adjusting the processing method to combine multiple lower-frequency pulse signals, the system achieves high measurement accuracy without requiring complex high-frequency circuit design
4Measurement precision
If multiple pulses are accumulated to improve S/N ratio, then detection accuracy is improved, but measuring time increases
Solution Approach 1:
Multiple pulse signals are merged by superimposing their sampling data in the time domain. This combining process improves the S/N ratio and detection accuracy while the patent optimizes the accumulation method to minimize the time required for processing multiple pulses
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 approach enables accurate distance measurement with reduced processing time, lower power consumption, and wider measurement ranges, even with faint reflected light, by improving the S/N ratio and peak value of the signal, thus optimizing the light wave distance measuring apparatus.
Implementation Method 1
a light receiving element for receiving the reflected pulsed light
Data Source
AI summary
A distance measuring apparatus using a pulse laser light which has a wide measurement range and can execute high speed operation. The apparatus emits a pulsed light onto an object, receives a reflected pulsed light by a light receiving element, and amplifies an output thereof by a tuning amplifier. A sampling data of a damped oscillation wave form responding to the reflected pulsed light output from the tuning amplifier is added so as to be shifted by one cycle. Accordingly, it is possible to execute an enhancing process of a peak value utilizing a periodicity of the damped oscillation wave form responding to the pulsed signal, and it is possible to improve a detecting sensitivity of the reflected pulsed light.