Surveying System Prism Tracking Without Vertical Alignment
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Solution Overview
Problem
Conventional surveying systems using prisms face poor workability and inefficiency, especially when the prism cannot be installed on the vertical line of the measuring point, such as at corners or tilted surfaces, requiring frequent leveling and limiting the ability to perform surveys.
Innovation Solution
A surveying system with a distance measuring module, tracking module, optical axis deflector, and arithmetic control module that allows for circular scanning and calculation of three-dimensional coordinates without the need for the prism to be vertically aligned, using a target with a high-reflectance pole and prism, enabling efficient distance measurement and coordinate calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a prism is used for surveying, then distance measurement can be performed, but the prism must be installed on a vertical line of the measuring point which requires frequent leveling and reduces workability
Solution Approach 1:
The target is divided into two functional parts: a high-reflectance pole for distance measurement and a prism for angular measurement. This segmentation allows each component to perform its optimal function independently, eliminating the need for vertical alignment while maintaining measurement accuracy.
Solution Approach 2:
The high-reflectance pole acts as an intermediary between the surveying instrument and the measuring point. It provides a stable target for distance measurement without requiring vertical alignment, mediating the measurement process and eliminating the leveling requirement.
2Measurement precision
If a prism is used for surveying, then distance measurement can be performed, but the prism cannot be installed on tilted surfaces or corners which limits surveying capability
Solution Approach 1:
By separating the distance measurement function (high-reflectance pole) from the angular measurement function (prism), the system can be installed on any surface including tilted surfaces and corners. The pole provides a stable distance target while the prism handles angular measurements, enabling surveying in previously inaccessible locations.
Solution Approach 2:
The target assembly serves multiple functions: the high-reflectance pole enables distance measurement on any surface, while the prism provides angular measurement capability. This multi-functionality makes the surveying system adaptable to diverse measuring point locations including corners and tilted surfaces.
3Measurement precision
If leveling is performed at every measuring point, then accurate prism surveying can be conducted, but working time increases and productivity decreases
Solution Approach 1:
The leveling requirement is extracted and eliminated from the surveying process. The high-reflectance pole target enables distance measurement without vertical alignment, removing the time-consuming leveling step while maintaining measurement accuracy through the separation of distance and angular measurement functions.
Solution Approach 2:
The target is pre-configured with both high-reflectance pole and prism components in a fixed relationship, eliminating the need for现场 leveling and adjustment. This preliminary configuration allows direct installation at any measuring point, significantly reducing setup time and improving productivity.
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 reduces the need for leveling, improves work efficiency, and allows for accurate three-dimensional coordinate calculation of measuring points, even when the prism is not vertically aligned, thereby enhancing surveying capabilities and reducing working time.
Implementation Method 1
a distance measuring module for emitting a distance measuring light, receiving a reflected distance measuring light and performing a distance measurement
Implementation Method 2
a tracking module which has a light emitter for emitting a tracking light onto an optical axis of the distance measuring light and a tracking light photodetector for receiving a reflected tracking light and performing a tracking based on a photodetecting position of the tracking light photodetector
Implementation Method 3
an optical axis deflector which is provided on a common optical axis of the distance measuring light and the reflected distance measuring light and deflects the optical axis of the distance measuring light and an optical axis of the reflected distance measuring light at the same deflection angle in the same direction
Data Source
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AI summary
A surveying system comprising a surveying instrument and a target having a pole and a prism which is provided on an axis of the pole, wherein the surveying instrument is configured to scan the distance measuring light with an optical center of the prism as a center by a circular scanning in a state where the prism is tracked, to calculate point cloud data of two points at which the pole intersects with the circular scanning, the axis of the pole and a tilt angle of the axis of the pole, a straight line on the pole which intersects with the circular scanning at two points, three-dimensional coordinates of two intersection points of the straight line and the circular scanning, and three-dimensional coordinates of the optical center of the prism, and to calculate three-dimensional coordinates of a measuring point based on the calculation result.