High-Order Pseudo-Random Electromagnetic Signal Generation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electromagnetic exploration methods waste time and increase costs due to narrow effective frequency band ranges and the need for continuous frequency changes to obtain exploration information from different frequency intervals.
Innovation Solution
A method for generating high-order pseudo-random electromagnetic exploration signals by constructing 2n sequence pseudo-random signals within a limited frequency interval using stairstep signals obtained by superposing in-phase periodic square wave signals with a frequency ratio of 2, and adjusting phases to minimize mean square errors, resulting in increased dominant frequencies and improved resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional pseudo-random signals are used with narrow effective frequency band ranges, then the signal generation is simple, but the exploration time increases and exploration costs increase due to the need to continuously change frequencies to obtain information from different frequency intervals
Solution Approach 1:
The patent combines multiple frequency components into a single pseudo-random signal by superposing square wave signals with different frequencies (1Hz, 2Hz, 4Hz, 8Hz, 16Hz, 32Hz, 64Hz). This merging allows simultaneous transmission of multiple frequency components that would traditionally require separate signals and sequential exploration, thereby reducing exploration time and improving efficiency
Solution Approach 2:
The patent segments the frequency spectrum into distinct components (1Hz, 2Hz, 4Hz, 8Hz, 16Hz, 32Hz, 64Hz) and assigns each to a specific square wave signal. This segmentation allows each frequency component to be independently controlled and optimized while maintaining their combined effectiveness in a single signal, enabling parallel exploration of different frequency intervals
2Measurement precision
If multiple frequency components are transmitted simultaneously to increase spectrum density, then the resolution and anti-interference capability improve, but the signal construction complexity increases
Solution Approach 1:
The patent changes the parameters of square wave signals (frequencies of 1Hz, 2Hz, 4Hz, 8Hz, 16Hz, 32Hz, 64Hz) to create a systematic frequency sequence. By adjusting these parameters, the signal achieves high spectrum density and improved resolution while maintaining a regular, predictable structure that simplifies generation compared to arbitrary multi-frequency combinations
Solution Approach 2:
The patent uses periodic square wave signals with specific frequencies that are powers of 2. These periodic signals create a regular frequency spectrum that is easier to generate and process. The periodic nature of the square waves ensures consistent frequency components that can be reliably transmitted and received, reducing the complexity of signal construction while maintaining high resolution
3Productivity
If conventional single-frequency or multi-frequency transmission signals are used, then the signal generation is straightforward, but mass data collection is limited and exploration costs increase
Solution Approach 1:
The patent merges 7 different frequency components (1Hz, 2Hz, 4Hz, 8Hz, 16Hz, 32Hz, 64Hz) into a single pseudo-random signal. This merging enables mass data collection by simultaneously transmitting multiple frequency components that would traditionally require separate signals, thereby increasing spectrum density and improving data collection efficiency
Solution Approach 2:
The patent creates a universal pseudo-random signal that performs multiple functions simultaneously: it transmits information across 7 different frequency intervals, provides high spectrum density for improved resolution, and enables mass data collection. This multi-functional signal replaces the need for multiple separate signals, reducing exploration costs while improving productivity
Data Source
AI summary
A method and system for generating a high-order pseudo-random electromagnetic exploration signal. The method includes: constructing two or more basic unit signals according to an exploration requirement, wherein the basic unit signals are stairstep signals obtained by superposing a plurality of in-phase periodic square wave signals, and a frequency ratio between adjacent ones of the plurality of periodic square wave signals is 2; and superposing the two or more basic unit signals to obtain superposed stairstep signals, and correcting amplitudes to be consistent with amplitudes of the periodic square wave signals, to obtain high-order 2n sequence pseudo-random signals. The 2n sequence stairstep signals of different orders can be constructed within a limited frequency interval.