GPS Receiver Repetitive Motion Detection via Phase Shift Analysis
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Solution Overview
Problem
Conventional GPS systems cannot effectively compute repetitive motion of a GPS receiver, leading to increased device size and power consumption when using micro-electronic-mechanical-system (MEMS) devices, which also compromise accuracy and shelf life.
Innovation Solution
A GPS-based system that utilizes repetitive phase shifts in received GPS signals to compute the repetitive motion of an object, eliminating the need for MEMS devices by integrating a GPS receiver and processor to detect and calculate phase shifts, thereby determining the object's motion and location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a MEMS device is integrated with the GPS receiver to compute repetitive motion, then the repetitive motion detection capability is improved, but the device size increases
Solution Approach 1:
The GPS receiver is designed to perform multiple functions: traditional location tracking and repetitive motion detection. By utilizing the existing GPS signal processing capabilities to detect phase shifts caused by repetitive motion, the system eliminates the need for separate MEMS devices, thereby maintaining measurement precision while reducing device size
Solution Approach 2:
The patent uses GPS signal phase shifts as an intermediary to detect repetitive motion. Instead of directly measuring motion with MEMS accelerometers, the system measures the phase changes in GPS signals caused by motion, providing an indirect but effective method that avoids adding mechanical components
2Measurement precision
If a MEMS device is integrated with the GPS receiver to compute repetitive motion, then the repetitive motion detection capability is improved, but the power consumption increases
Solution Approach 1:
The GPS receiver processes GPS signals for both location determination and repetitive motion detection simultaneously. By extracting motion information from the same GPS signal processing pipeline, the system avoids the additional power consumption that would result from operating separate MEMS devices
Solution Approach 2:
The GPS receiver uses its own operational data (received GPS signals and their phase information) to determine repetitive motion. This self-service approach allows the system to derive motion information without requiring external power-intensive sensors, as the GPS signal processing itself provides the necessary data
3Measurement precision
If a MEMS device is integrated with the GPS receiver to compute repetitive motion, then the repetitive motion detection capability is improved, but the accuracy and shelf life are compromised
Solution Approach 1:
The patent replaces mechanical MEMS sensing systems with an electromagnetic signal-based approach. By detecting phase shifts in GPS radio frequency signals, the system eliminates mechanical moving parts that are prone to wear and accuracy degradation, thereby improving long-term reliability and shelf life while maintaining measurement capability
Solution Approach 2:
The GPS signal processing approach uses software-based detection algorithms that do not degrade over time like mechanical components. The virtual measurement system based on signal processing provides consistent accuracy without the wear and tear issues inherent in physical MEMS devices
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 solution allows for accurate computation of repetitive motion and location without increasing device size or power consumption, enhancing the tracking of metrics and statistics while maintaining accuracy and reducing production costs.
Implementation Method 1
a processor for detecting repetitive phase shifts in the received GPS signals
Data Source
AI summary
A system mounted to an object for detecting repetitive motion of the object. The system includes a GPS receiver for receiving GPS signals while being maneuvered in a repetitive motion by the object, and a processor for detecting repetitive phase shifts in the received GPS signals. In general, the system computes the repetitive motion of the GPS receiver based on the repetitive phase shifts.