Surveying Instrument Optical Axis Deflection for Automated 3D Scanning
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Solution Overview
Problem
Existing surveying instruments, such as total stations, require manual re-sighting for each measurement position, leading to increased measurement time, especially when the object's position changes slightly, due to the need for one-point sighting.
Innovation Solution
A surveying instrument equipped with a distance measuring unit, optical axis deflecting unit, and arithmetic control component that performs two-dimensional scanning using rotating optical prisms and motors to automatically detect and measure horizontal and vertical angles of an object, allowing for three-dimensional coordinate acquisition without manual re-sighting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual sighting is used for each measurement position, then measurement precision can be ensured, but total measurement time is lengthened
Solution Approach 1:
The surveying instrument automatically performs sighting and measurement functions without requiring operator intervention. The arithmetic control component controls the optical axis deflecting unit to automatically sight the reflecting component, and the distance measuring unit automatically measures distance, eliminating manual operation while maintaining measurement quality
Solution Approach 2:
The patent replaces manual mechanical sighting operations with an automated control system. The arithmetic control component uses electrical signals to control the optical axis deflecting unit and distance measuring unit, substituting the operator's manual mechanical operations with an automated electromechanical system
2Measurement precision
If one-point sighting is performed, then measurement accuracy is maintained, but operational efficiency decreases when multiple positions need measurement
Solution Approach 1:
The optical axis deflecting unit continuously scans across multiple measurement positions without interruption. The arithmetic control component controls the optical prisms to deflect the optical axis sequentially through different positions, maintaining continuous measurement action rather than requiring repeated manual re-sighting operations
Solution Approach 2:
The patent introduces dynamic optical axis deflection capability through the optical axis deflecting unit with rotating optical prisms. This allows the measurement system to dynamically adjust and scan through multiple positions automatically, transforming the static one-point sighting into a dynamic multi-position scanning measurement process
3Adaptability or versatility
If the reflecting component position is moved slightly, then adaptability to different positions is improved, but manual re-sighting is required increasing time consumption
Solution Approach 1:
The distance measuring unit detects the position of the reflecting component and provides feedback to the arithmetic control component. The control component uses this feedback to automatically adjust the optical axis deflection and maintain accurate sighting of the reflecting component even when its position changes, eliminating the need for manual re-sighting
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 enables efficient and automated sighting of objects, reducing measurement time and improving operational efficiency by eliminating the need for manual re-sighting and allowing for precise three-dimensional data acquisition.
Implementation Method 1
a light emitting element for emitting a distance measuring light beam, a distance measuring light projecting unit for projecting the distance measuring light beam, a light receiving unit for receiving a reflected distance measuring light beam
Implementation Method 2
the optical axis deflecting unit comprises a pair of optical prisms capable of rotating with the distance measuring optical axis as a center
Implementation Method 3
a photodetector for receiving the reflected distance measuring light beam and generating a light receiving signal
Data Source
AI summary
A surveying instrument comprises a distance measuring unit which includes a light emitting element, a distance measuring light projecting unit, a light receiving unit and a photodetector for producing a light receiving signal, and which performs a distance measurement of an object to be measured based on the light receiving signal, an optical axis deflecting unit for deflecting the distance measuring optical axis, a projecting direction detecting unit for detecting a deflection angle of the distance measuring optical axis and an arithmetic control component, wherein the optical axis deflecting unit comprises a pair of optical prisms capable of rotating and motors which individually and independently rotate the optical prisms, and wherein the arithmetic control component is configured to control the optical axis deflecting unit, to perform a two-dimensional scanning of the distance measuring light, to perform a distance measurement of when the light receiving signal is detected, to measure a horizontal angle and a vertical angle of the object to be measured, and to obtain three-dimensional coordinates of the object to be measured based on a distance value, and the horizontal angle and the vertical angle.