Geodetic Instrument Time Synchronization for Pulse Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing geodetic instruments face challenges in accurately and efficiently determining directions to geodetic targets, especially in environments with multiple targets and long distances, due to interference from other light sources.
Innovation Solution
The method involves synchronizing the emission of an optical pulse from the geodetic target with the capture of images by the geodetic instrument, creating a difference image to filter out interference and increase pulse amplitude, allowing for longer measurement distances and improved target identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If continuous light emission is used for target identification, then target visibility is improved, but power consumption increases and thermal limits are exceeded
Solution Approach 1:
The geodetic target emits optical pulses periodically rather than continuously. The imaging device captures images at specific time points synchronized with these pulses. This periodic emission reduces power consumption and thermal load while maintaining target visibility during the pulse duration.
Solution Approach 2:
The system performs preliminary synchronization between the geodetic target and the imaging device before actual measurement. Time stamps are exchanged and coordinated in advance, ensuring that the imaging device is ready to capture the optical pulse at the correct moment, eliminating the need for continuous monitoring.
2Measurement precision
If optical pulse amplitude is increased to improve detection reliability, then measurement precision is improved, but power consumption increases
Solution Approach 1:
By using periodic optical pulses instead of continuous emission, the system can concentrate energy into brief high-amplitude bursts. This allows high measurement precision during the pulse while keeping average power consumption low through the intermittent nature of the emission.
Solution Approach 2:
The geodetic instrument performs preliminary time synchronization with the geodetic target before capturing the optical pulse. This ensures that the imaging device is precisely timed to capture the high-amplitude pulse, maximizing detection reliability without requiring continuous high-power emission.
3Productivity
If multiple geodetic targets operate simultaneously, then productivity is improved, but interference between targets increases
Solution Approach 1:
Multiple geodetic targets emit optical pulses periodically with different time patterns or time stamps. The imaging device captures images at specific time points and uses time correlation to identify which pulse came from which target, allowing multiple targets to operate simultaneously without interference.
Solution Approach 2:
Before simultaneous operation of multiple targets, the system performs preliminary time synchronization and allocation of time slots or time stamp patterns for each target. This preliminary coordination ensures that pulses from different targets can be distinguished and processed correctly, enabling high productivity without interference.
4Adaptability or versatility
If measurement distance is increased to cover larger construction sites, then adaptability is improved, but signal detection reliability deteriorates
Solution Approach 1:
The geodetic instrument performs preliminary time synchronization with the geodetic target before capturing the optical pulse. This preliminary coordination ensures that the imaging device is precisely timed to capture the pulse at the optimal moment, maximizing detection reliability even at long distances where the signal is weak.
Solution Approach 2:
The system uses periodic optical pulses with sufficient duration and intensity concentrated in time. This allows the pulse to travel longer distances while maintaining detectable amplitude at the receiver, extending the measurement range without sacrificing reliability through the use of time-synchronized periodic emission.
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 enhances the reliability of target identification, increases the measuring distance, and reduces power consumption while maintaining thermal limits, enabling more accurate and efficient direction determination in complex environments.
Implementation Method 1
an optical pulse may be emitted towards the geodetic instrument from the geodetic target
Data Source
AI summary
The present disclosure provides a method for determining a direction to a geodetic target from a geodetic instrument. The method includes emitting an optical pulse from the geodetic target, capturing a first image and a second image of the geodetic target using a camera arranged at the geodetic instrument, obtaining a difference image between the first image and the second image, and determining a direction to the geodetic target from the geodetic instrument based on the position of the optical pulse in the difference image. The method further includes synchronizing the geodetic instrument and the geodetic target for emitting the optical pulse concurrently with the capturing of the first image and nonconcurrently with the capturing of the second image. The present disclosure also provides a geodetic instrument, a geodetic target and a geodetic surveying system.