Total Station Calibration Using GNSS Camera-Based Encoder Alignment
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Solution Overview
Problem
Existing GNSS devices face challenges with high-precision positioning due to the need for bulky external equipment, such as tripods, and suffer from interference between multiple components, leading to issues with portability, reliability, and durability, especially in remote locations.
Innovation Solution
A handheld GNSS device with integrated GNSS and communication antennas, orientation and imaging circuitry, and a single housing that minimizes interference, allowing precise positioning without external hardware, using a single housing with separated antenna patterns and integrated sensors for accurate data collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple separate units are used to house GNSS components, then high-precision positioning can be achieved, but portability and device complexity are reduced
Solution Approach 1:
The patent combines multiple GNSS components (antennas, receivers, processors) into a single integrated unit. The housing contains both a first antenna for receiving satellite signals and a second antenna for receiving correction data, along with processing circuits that integrate multiple functions. This merging eliminates the need for separate external equipment while maintaining high-precision positioning capabilities through integrated signal processing and correction application.
2Measurement precision
If external hardware equipment is used for positioning, then measurement precision is improved, but ease of operation and portability are reduced
Solution Approach 1:
The patent integrates all necessary positioning components including satellite signal antennas, correction data antennas, receivers, and processing circuits into a single portable unit. This eliminates the need for external tripods, separate correction receivers, and multiple cables, making the system easy to transport and operate while maintaining high-precision positioning accuracy through integrated real-time correction processing.
3Reliability
If multiple units with cables and connectors are used, then reliability can be maintained, but device complexity and ease of operation are reduced
Solution Approach 1:
The patent integrates multiple functional units into a single housing, eliminating the need for external cables and connectors between separate devices. The integrated design includes internal signal pathways and circuit connections that reduce potential failure points from connector interfaces while maintaining system reliability through unified signal processing and correction data application within the same device.
4Measurement precision
If multiple separate units are used, then measurement precision is improved, but manufacturing cost and assembly complexity are reduced
Solution Approach 1:
The patent consolidates multiple GNSS components into a single integrated unit that can be manufactured as one assembly rather than multiple separate devices. This integration reduces manufacturing costs by eliminating the need to produce, test, and assemble multiple separate units, while still achieving high-precision positioning through integrated real-time correction processing and unified antenna systems.
Data Source
AI summary
A method of calibrating a total station using a GNSS device includes physically coupling the total station with the GNSS device at a first location; determining the position of the total station at the first location based on position data received by the GNSS device; decoupling the total station from the GNSS device; moving the GNSS device to a second location while leaving the total station at the first location; determining the position of the GNSS device at the second location based on position data received by the GNSS device; adjusting the position of a camera on the total station to image the GNSS device while at the second location; determining axes of the camera based on the orientation of the camera and the determined positions at the first and second locations; and calibrating encoders of the total station based on the determined axes.