Laser Marking System Prism-Based Orientation Control
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Solution Overview
Problem
The existing laser marking systems at construction sites require complex arithmetic processing and a significant arithmetic load due to the need for incident angle sensor calculations and positioning measurements relative to a total station, making the marking process inefficient.
Innovation Solution
A marking system and method that include a surveying device, a marking laser emitter, a first relative angle calculator, a second relative angle calculator, and a differential angle calculator to simplify the process by specifying the direction of the surveying device and target marking position relative to the marking laser emitter, and rotating the emitter by the calculated differential angle to project laser marking lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If incident angle sensor is used to measure position relative to total station, then positioning accuracy is improved, but device complexity and arithmetic load increase
Solution Approach 1:
The patent extracts and eliminates the incident angle sensor from the laser marking instrument. Instead of using the sensor to measure incident angles and calculate position relative to a total station, the system uses a prism attached to the laser marking instrument as a survey target. The total station directly measures the position and orientation of the prism, thereby obtaining the position and orientation of the laser marking instrument without requiring complex sensor hardware or arithmetic calculations.
Solution Approach 2:
The prism serves multiple functions: it acts as both the survey target for position measurement and the reference for orientation determination. By making the laser marking instrument itself (via the attached prism) the survey target, the system eliminates the need for separate sensing devices and achieves both positioning and orientation measurement through a single integrated approach.
2Measurement precision
If incident angle sensor and total station measurement are used, then positioning precision is improved, but marking process efficiency deteriorates
Solution Approach 1:
The prism is pre-attached to the laser marking instrument before the marking process begins. This preliminary setup allows the total station to directly measure the position and orientation without requiring subsequent calculation steps. The system performs the measurement action in advance and directly obtains the results needed for marking, eliminating time-consuming arithmetic processing during the actual marking operation.
Solution Approach 2:
The patent replaces the mechanical/sensor-based incident angle measurement system with an optical measurement system using a prism and total station. This substitution eliminates the need for complex arithmetic processing of sensor data and directly provides position and orientation information through optical measurement, thereby improving marking process efficiency while maintaining positioning precision.
3Loss of information
If incident angle calculation is performed, then relative position measurement is achieved, but arithmetic complexity increases
Solution Approach 1:
Instead of calculating relative position through complex arithmetic processing of incident angle sensor data, the system uses the prism as a physical copy/reference of the laser marking instrument's position and orientation. The total station directly measures the prism's position and orientation, providing the same information that would otherwise require complex calculations, thereby eliminating arithmetic complexity while preserving relative position measurement capability.
Data Source
AI summary
An external controller specifies the direction of a surveying instrument with respect to a laser marking instrument to calculate a first relative angle as an angle relative to the surveying instrument, calculates a second relative angle as an angle relative to a target line based on design information, and calculates a differential angle between the first relative angle and the second relative angle, thereby rotating a marking laser emitter by the differential angle to project marking laser light onto the target line.