Phase Difference Frequency Generating Method Circuit Simplification
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Solution Overview
Problem
Existing electronic distance meters require separate generators for generating signals with desired phase differences and inverted phases, leading to complex circuit arrangements and increased costs.
Innovation Solution
A phase difference frequency generating method that cuts out a reference signal to create intermittent signals with desired phase shifts, allowing for the generation of signals with desired phases without additional generators, using a signal for intermitting and a phase shifter to adjust the phase by π/a of the fundamental frequency, and a restoration processing to restore the shifted signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate generators are provided for generating signals with different phases and inverted phases, then the desired phase signals can be generated, but the circuit arrangement becomes complicated and costs increase
Solution Approach 1:
The patent merges the functions of multiple phase signal generators into a single generator by implementing phase shifting logic within one device. The single generator produces both normal phase and inverted phase signals by controlling the switching timing of the light emitter, thereby reducing circuit complexity while maintaining the capability to generate various phase signals.
Solution Approach 2:
The single generator is designed to perform multiple functions: it can generate reference signals, modulated frequency signals, and both normal and inverted phase signals by adjusting the switching control logic. This multi-functional design eliminates the need for separate dedicated generators for each phase signal type.
2Adaptability or versatility
If separate generators are provided for generating signals with different phases, then the desired phase signals can be generated, but costs increase
Solution Approach 1:
By combining multiple generator functions into a single integrated generator, the patent reduces the total component count and manufacturing complexity. This consolidation directly lowers production costs while preserving the ability to generate various phase signals through software or logic control.
3Object-affected harmful factors
If separate generators are provided for generating inverted phase signals, then noise elimination can be achieved, but the circuit arrangement becomes complicated
Solution Approach 1:
The patent integrates the inverted phase signal generation capability within the single generator by controlling the switching timing. This allows the system to generate inverted phase signals for noise elimination purposes without requiring a separate dedicated generator, thus reducing circuit complexity while maintaining noise reduction functionality.
Data Source
AI summary
A phase difference frequency generating method comprising: cutting out a reference signal, which is a continuous signal with a predetermined frequency, in a predetermined time and at a predetermined time interval by a signal for intermitting and creating a first intermittent signal, shifting the signal for intermitting by a time corresponding to π/a (a=natural number) of a fundamental frequency of the reference signal, cutting out the reference signal in the predetermined time and at the predetermined time interval by the signal for intermitting as shifted and creating a second intermittent signal, and carrying out a restoration processing for restoring the second intermittent signal by a time as shifted.