Airborne Laser Measurement Data Transmission Segmentation
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Solution Overview
Problem
Existing laser measurement systems face challenges in efficiently transmitting large amounts of data from an air vehicle to a ground station due to limited transmission capacity, which hinders quick response capabilities, especially in situations like disaster assessment.
Innovation Solution
A laser measurement device and method that prioritize the sequential radio transmission of laser measurement data during straight line flight and flight state data during turn flight, utilizing data accumulation and compression to optimize transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If laser measurement data is transmitted continuously during the entire measurement period, then the quick response capability is improved, but the transmission capacity is exceeded and data loss occurs
Solution Approach 1:
The measurement period is segmented into measurement periods and measurement suspended periods. During measurement periods, laser measurement data is transmitted; during measurement suspended periods, flight state data is transmitted. This segmentation allows the system to handle different data types at different times, preventing transmission capacity overflow while maintaining continuous data flow to the ground station.
Solution Approach 2:
The transmission operation is performed periodically by alternating between transmitting laser measurement data during measurement periods and flight state data during measurement suspended periods. This periodic transmission pattern ensures that the limited transmission capacity is utilized efficiently without being overwhelmed by continuous high-volume laser measurement data.
2Productivity
If all laser measurement data is transmitted with priority, then the data analysis speed is improved, but the flight state data transmission is delayed
Solution Approach 1:
The transmission of different data types is segmented into separate time periods. Laser measurement data transmission is prioritized during measurement periods when this data is being generated, while flight state data transmission is scheduled during measurement suspended periods. This segmentation ensures that each data type receives appropriate transmission priority without causing delays to the other.
Solution Approach 2:
Flight state data obtained during measurement periods is accumulated and prepared for transmission in advance, then transmitted during measurement suspended periods. This preliminary accumulation allows the system to quickly transmit flight state data as soon as transmission opportunity arises, minimizing delays while maintaining priority processing of laser measurement data during active measurement phases.
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 efficient data compression and transmission of laser measurement data with priority processing, ensuring continuous data processing and efficient use of the transmission path, while allowing for timely analysis of flight state data during measurement suspended periods.
Implementation Method 1
emitting laser pulses from an air vehicle to a ground surface in order to measure the shape of the ground surface
Data Source
AI summary
To provide measurement data on a real time basis from a laser measurement device mounted on an air vehicle to a ground station. The laser measurement unit sequentially outputs laser measurement data during a measurement period in which the air vehicle flies along a straight line flight fairway (32). The transmission unit desirably compresses the laser measurement data when the laser measurement data is accumulated to a file size while the air vehicle flies along straight line flight fairway (32), and transmits the laser measurement data to the ground station. The transmission units does not transmit the flight state data obtained by the GPS/IMU to the ground station on the straight line flight fairway (32), but transmits during a measurement suspended period in which the air vehicle flies along a turn fairway (34).