Single GNSS Antenna Azimuth Measurement via 360-Degree Rotation
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Solution Overview
Problem
Existing surveying devices require two GNSS devices to reduce error in geographical coordinates and azimuth angle measurements, increasing manufacturing costs.
Innovation Solution
A position and azimuth measurement device with a single GNSS device, a horizontal rotating section, leveling section, and control device that continuously obtains position information during a full rotation, selects reliable satellites, applies a ring-shaped filter to position information, and computes coordinates and azimuth angles using representative values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If two GNSS devices are used to reduce error in observation values, then measurement precision is improved, but manufacturing cost increases
Solution Approach 1:
The patent applies the dynamics principle by rotating the single GNSS antenna horizontally through 360 degrees during measurement. This dynamic movement allows one antenna to collect position information from multiple azimuth directions, effectively replacing the need for multiple static antennas while maintaining measurement precision through temporal integration of rotational data
Solution Approach 2:
The patent introduces a temporal and spatial dimension by having the antenna rotate horizontally. Instead of using multiple antennas at different positions simultaneously (spatial dimension), the system uses a single antenna that moves through space over time (temporal dimension), collecting position data at various azimuth angles during rotation to achieve the same measurement accuracy
2Ease of manufacture
If a single GNSS device is used to reduce manufacturing cost, then ease of manufacture is improved, but measurement precision deteriorates due to error in observation values
Solution Approach 1:
The patent implements continuous useful action by having the GNSS antenna rotate continuously through 360 degrees while continuously collecting position information. This continuous rotational measurement allows the system to gather abundant position data from all azimuth directions, enabling accurate calculation of the vertical axial center coordinates and improving measurement precision through integrated data processing
Solution Approach 2:
The system uses feedback by continuously monitoring position information during rotation and using this data to calculate and refine the vertical axial center coordinates. The control device processes the collected position information to determine the precise center location, with the feedback loop ensuring accurate measurement despite using a single antenna
Data Source
AI summary
A position and azimuth measurement device capable of measuring geographical coordinates and azimuth angles and a surveying device are provided. The position and azimuth measurement device includes a GNSS device, having a GNSS antenna for obtaining position information thereof; a horizontal rotating section capable of rotating the GNSS antenna horizontally; a leveling section capable of leveling the horizontal rotating section; a horizontal angle detector configured to detect a horizontal angle of the horizontal rotating section; and a control device. The control device causes the GNSS device to continuously obtain the position information while causing the horizontal rotating section leveled by the leveling section to make one full rotation, and computes geographical coordinates and an azimuth angle on the basis of the position information obtained throughout the full rotation.