Integrated Auto-Level with Electronic Rod Reader for Surveying Accuracy
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Solution Overview
Problem
The use of auto-levels in construction and surveying is hindered by errors in reading grade rod scales and recording elevations, which can lead to incorrect instructions for earthmoving operations due to operator skill dependence and communication issues between the auto-level operator and the assistant holding the grade rod.
Innovation Solution
An electronic rod reader and field notebook system that automatically recognizes crosshairs and scale markings on standard grade rods, determines elevations, and communicates instructions wirelessly, using a cellular device with GNSS capabilities to enhance accuracy and reduce manual errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual reading and recording methods are used, then operator flexibility and device simplicity are maintained, but reading accuracy and error reduction are compromised
Solution Approach 1:
The patent combines the auto-level instrument with an electronic rod reader and field notebook into an integrated system. The electronic rod reader captures images of the rod scale through the auto-level's optical path, while the field notebook records measurements digitally, eliminating separate manual processes and improving reading accuracy through automated image analysis.
Solution Approach 2:
The patent replaces manual mechanical reading processes with electronic and optical systems. Instead of operators manually reading scale markings through the eyepiece, an electronic rod reader uses a camera and image processing to automatically capture and analyze the rod scale, substituting human visual interpretation with automated digital measurement.
2Reliability
If automated electronic reading is implemented, then reading accuracy and error reduction are improved, but device complexity and cost increase
Solution Approach 1:
The patent makes the auto-level instrument multi-functional by integrating it with electronic rod reading and digital field notebook capabilities. The same optical path and eyepiece assembly serve both traditional manual reading and automated electronic capture, allowing a single device to perform multiple functions without requiring completely separate systems.
Solution Approach 2:
The patent introduces an electronic rod reader as an intermediary component that bridges the optical output of the auto-level and the digital recording system. This intermediary captures images through the optical path, processes them to determine rod readings, and transmits data to the field notebook, mediating between the optical measurement system and digital recording.
3Loss of information
If manual field book recording is used, then simplicity and ease of operation are maintained, but communication accuracy and instruction reliability deteriorate
Solution Approach 1:
The patent implements feedback loops where the electronic field notebook automatically records measurements as they are taken, and the system can verify readings against captured images. This feedback mechanism ensures that instructions transmitted to field workers are accurately based on recorded measurements, reducing communication errors while maintaining operational flow.
Solution Approach 2:
The patent performs preliminary digital recording of measurements in the electronic field notebook before they are communicated to field workers. By capturing and storing measurement data digitally in advance, the system ensures accurate documentation is available before instructions are given, preventing errors from manual transcription or miscommunication.
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 system improves the accuracy of elevation readings and communication, reducing errors in recording and instruction transmission, and provides a more reliable method for determining site elevations and coordinates, facilitating precise earthmoving operations.
Implementation Method 1
Once the device is approximately level, the optics are self-leveling in that they are hung like a pendulum within the device
Implementation Method 2
the optics are self-leveling in that they are hung like a pendulum within the device
Data Source
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AI summary
An integrated auto-level and electronic rod reader is disclosed. In one embodiment, the integrated auto-level and electronic rod reader comprises a telescope and an image delivery device integrated with the auto-level which is configured for capturing an image of a standard grade rod visible through the telescope and a crosshair. Logic implemented by a processor automatically recognizes the crosshair, automatically compares the crosshair against a scale of the standard grade rod, and automatically determines an elevation of the standard grade rod based upon the comparing.