Dual-Image Pickup System for Surveying Instrument Tracking
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Solution Overview
Problem
Surveying instruments with tracking functions face inefficiencies due to narrow field angles and frequent interruptions from obstacles, leading to prolonged target re-detection times and decreased measurement efficiency.
Innovation Solution
Incorporating a dual-image pickup system with a first solid image pickup element for a wider field of view and a second solid image pickup element for higher accuracy, along with an image pickup control unit that switches between them to maintain target tracking, allowing for quicker re-detection and improved measurement efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a collimating telescope with a small field angle (about 1°) is used for tracking, then measurement precision is improved, but the target re-detection time increases when the target is lost or obstructed
Solution Approach 1:
The patent divides the image pickup function into two separate systems: a first image pickup means with a wide field angle for rapid target search and acquisition, and a second image pickup means with a narrow field angle for precise tracking measurements. This segmentation allows each system to optimize for its specific function, resolving the contradiction between quick re-detection and precise measurement.
Solution Approach 2:
The patent creates a multi-functional imaging system where the first image pickup means serves the universal function of target search and initial acquisition across a wide area, while the second image pickup means provides specialized high-precision tracking function. The system can switch between these functions based on operational needs.
2Speed
If the field angle of the collimating telescope is increased to expand the detection range, then target re-detection speed is improved, but measurement precision deteriorates
Solution Approach 1:
The patent segments the detection system into two specialized components: the first image pickup means with a large field angle optimized for rapid target acquisition and search operations, and the second image pickup means with a small field angle optimized for precise measurement tracking. This eliminates the need to compromise between field angle size and precision.
Solution Approach 2:
Each image pickup means is designed with locally optimized qualities: the first system has a wide field of view for broad coverage and fast detection, while the second system has a narrow field of view with higher resolution for precise measurement. Each component excels at its specific local function.
3Device complexity
If a single image pickup system is used, then device complexity is reduced, but the ability to maintain continuous tracking under obstructed conditions deteriorates
Solution Approach 1:
The patent segments the imaging function into two coordinated systems that work together to improve reliability. The first image pickup means continuously monitors a wide area for target presence, while the second maintains precise tracking when the target is within the narrower field. This dual-system approach ensures tracking continuity even when obstacles temporarily block the primary tracking path.
Solution Approach 2:
The first image pickup means performs preliminary detection and target acquisition actions before the second image pickup means begins precise tracking. This preliminary action ensures the target is captured and locked onto in advance, maintaining tracking continuity if obstacles subsequently block the narrower field of view.
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
The dual-image pickup system enables faster target reacquisition and reduced tracking interruption times, enhancing measurement efficiency and accuracy by expanding the tracking range and reducing noise interference.
Implementation Method 1
a first image pickup means with a first solid image pickup element, a second image pickup means with a second solid image pickup element
Data Source
AI summary
The present invention provides a surveying instrument provided with a tracking function, said surveying instrument comprising a first image pickup means 40 with a first solid image pickup element 33, a second image pickup means 37 with a second solid image pickup element 19, an image pickup control instrument for controlling image pickup conditions of said first image pickup means and said second image pickup means, and a control unit for controlling the tracking operation of a target 36 based on a target image signal obtained at the first solid image pickup element or based on a target image signal obtained at the second solid image pickup element, wherein the first image pickup means can acquire an image in wider range by said second image pickup means, and wherein the image pickup control instrument controls so that a target image is acquired by the first image pickup means when the target image is out of a photodetection range of the target of the second solid image pickup element and controls so that the target image is acquired by the second image pickup means when the target image detected by the first solid image pickup element is within the predetermined range.