Positioning Unit Thinning Strategy for GPS Power Management
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Solution Overview
Problem
Conventional information acquisition devices, such as imaging devices with GPS, face challenges in balancing the need to record detailed movement trajectories with the need to conserve electrical power, leading to quick battery drain and increased processing time due to continuous GPS operation.
Innovation Solution
An information acquisition device that includes a positioning unit, an information acquisition unit, and a control unit which causes the positioning unit to perform positioning at predetermined intervals while the information acquisition unit is active, and thins and stores positional information outside a predetermined time period relative to information acquisition, reducing power consumption and data volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the GPS unit operates continuously to record detailed movement trajectories, then the measurement precision and completeness of positional information is improved, but the electrical power consumption increases and battery life decreases
Solution Approach 1:
The GPS unit operates periodically rather than continuously, with the control unit determining specific timing intervals for positioning operations. This periodic operation reduces power consumption while still capturing essential movement trajectory data at meaningful intervals, resolving the contradiction between continuous monitoring and power conservation.
Solution Approach 2:
The system dynamically changes the sampling interval parameter for GPS positioning based on movement detection. When movement is detected, the sampling interval decreases to capture detailed trajectories; when stationary, the interval increases to conserve power. This adaptive parameter adjustment resolves the contradiction by optimizing the balance between data completeness and power consumption.
2Quantity of substance
If the GPS unit operates continuously to capture detailed movement trajectories, then the quantity of positional information is improved, but the data storage requirements and processing time increase
Solution Approach 1:
The system extracts only the essential positional information needed for representing movement trajectories, rather than storing all raw GPS data points. The control unit determines which positioning results are significant for capturing movement patterns, extracting and storing only those data points that contribute meaningfully to the trajectory representation, thus reducing overall data volume and processing requirements.
Solution Approach 2:
The system performs positioning at selective intervals rather than continuously, using partial action to capture sufficient movement trajectory information. By positioning only when movement is detected or at strategic intervals, the system obtains adequate trajectory data without the excessive processing burden of continuous positioning, resolving the contradiction between data completeness and processing efficiency.
3Measurement precision
If the sampling interval for positional information is reduced to capture detailed movement trajectories, then the measurement precision is improved, but the data volume and storage requirements increase
Solution Approach 1:
The system applies different sampling densities to different segments of the movement trajectory based on local characteristics. When significant movement or directional changes are detected, the sampling interval decreases to capture detailed local trajectories. During periods of steady movement, the interval increases. This local quality adjustment resolves the contradiction by providing high measurement precision where needed while reducing overall data volume.
Data Source
AI summary
An information acquisition device includes: a positioning unit that measures a current position and acquires positional information thereof; an information acquisition unit that acquires information; a storage unit that stores information acquired by the information acquisition unit and positional information acquired by the positioning unit; and a control unit that causes the positioning unit to perform positioning, while the information acquisition unit is activated, at an interval shorter than while the information acquisition unit is stopped, and causes positional information acquired while the information acquisition unit is activated, outside a time period determined in advance with a time in which acquisition of information was performed by the information acquisition unit as a reference point, among positional information acquired in the positioning unit, to be thinned and stored in the storage unit.