3D Projection Apparatus for Accurate Land Marking
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Solution Overview
Problem
Existing measurement and installation point marking apparatuses struggle to accurately mark measurement and installation points due to irregularities in the land, causing shifts from the intended target position, especially when the target needs to be positioned just above the measurement point.
Innovation Solution
A measurement and installation data indicating apparatus that includes a distance image sensor, a projector, an inclination data obtaining part, and a terminal controller to correct and project target information images based on distance and inclination data, ensuring accurate positioning on a projection plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a laser pointer is used to mark an arbitrary position with the target position as reference, then the marking operation becomes easier, but the marked position shifts from the appropriate measurement and installation point due to land irregularity
Solution Approach 1:
The patent transitions from 2D laser point marking to 3D spatial mapping by introducing a distance image sensor that captures depth information. This enables the system to account for land irregularities in the vertical dimension, correcting the projected image to accurately represent the target position on the actual terrain surface rather than on a flat plane.
Solution Approach 2:
The system creates a digital copy of the actual terrain surface using distance image data, then overlays a corrected target information image that accounts for land irregularities. This virtual copy allows the operator to see the accurate target position despite physical terrain variations, resolving the contradiction between ease of marking and position accuracy.
2Measurement precision
If the target is moved to a position right above the measurement point to account for land irregularity, then positioning accuracy improves, but the operation becomes more complex and time-consuming
Solution Approach 1:
The patent replaces the manual mechanical process of physically moving the target to account for terrain irregularities with an automated optical-computational system. The distance image sensor and processor automatically calculate and correct for land irregularities, projecting the target information image directly at the accurate position without requiring manual target adjustment.
Solution Approach 2:
The system performs self-correction by automatically detecting land irregularities through the distance image sensor and adjusting the projected target information image accordingly. This eliminates the need for operator intervention to compensate for terrain variations, reducing operational complexity while maintaining high positioning accuracy.
3Ease of operation
If a laser pointer marks the position just below the target, then the operation is simpler, but it is difficult to identify the exact measurement and installation point
Solution Approach 1:
The patent enhances the simple laser point marking by adding vertical dimension information through the distance image sensor. The system determines the actual distance to the terrain surface and adjusts the projection accordingly, ensuring the target information image appears at the correct vertical position on the irregular land, thus preserving position identification information.
Solution Approach 2:
The system creates a corrected visual copy of the target position that accounts for land irregularities. Instead of relying on the operator to mentally calculate the correct position below the target, the system projects an accurate visual representation directly onto the terrain, eliminating information loss about the precise measurement point location.
Data Source
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AI summary
A measurement and installation data indicating apparatus and a measurement and installation data indicating method capable of easily and appropriately measuring a target position are provided. The measurement and installation data indicating apparatus includes a distance image sensor (55) that obtains distance image data (62) in a predetermined range, a projector (56) that projects an image on a projection plane (13) in a predetermined range, an inclination data obtaining part (54) that obtains inclination data (61) on a detection optical axis (55a) and a projection optical axis (56a) relative to a vertical direction, a positional data obtaining part (12, 57) that obtains coordinate data (71) on a present position (75) and a target position (72), and a terminal controller (52) that generates, based on the coordinate data, a target information image (77) related to the target position and seen from the present position. The terminal controller (52) corrects the target information image (77) to fit to a shape of the projection plane (13) based on the distance image data (62) obtained by the distance image sensor (55) and the inclination data (61) obtained by the inclination data obtaining part, and projects the corrected target information image (77) by the projector (56).