Positioning System Using Dual Antenna Pairs for Accurate Direction Detection
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Solution Overview
Problem
Existing positioning systems face accuracy issues due to clock desynchronization between first and second systems, leading to increased system complexity and the need for separate installations at different positions.
Innovation Solution
A positioning system with a measurement apparatus featuring alternating first and second antenna pairs with different spacings, using transmission signals with phase differences and frequencies to determine the target object's direction and distance without requiring synchronization, allowing for a simplified configuration and closer installation of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the clocks used in the first and second systems are used for position detection, then the position detection accuracy decreases when the clocks become out of synchronization, but using only one clock requires the first and second systems to be synchronized and installed at different positions, increasing system scale
Solution Approach 1:
The patent combines the functions of the first and second systems into a single integrated measurement apparatus with two antenna pairs. The first antenna pair (31, 32) and second antenna pair (41, 42) are housed in the same measurement apparatus (2), eliminating the need for separate synchronized systems at different positions. This merging reduces system scale while maintaining position detection accuracy through the use of a single clock for time measurement.
Solution Approach 2:
The measurement apparatus is segmented into two antenna pairs with different spacing configurations. The first antenna pair has a larger spacing for detecting directions in a first range, while the second antenna pair has a smaller spacing for detecting directions in a second range. This segmentation allows the single measurement apparatus to handle multiple detection scenarios without requiring multiple synchronized systems.
2Measurement precision
If two antenna pairs with different spacings are used to detect direction and distance, then measurement accuracy is improved, but the device complexity increases
Solution Approach 1:
The measurement apparatus is designed with multi-functionality by incorporating two antenna pairs that can be selectively used based on the detection requirements. The first antenna pair is used for detecting target directions in a first range, while the second antenna pair is used for detecting target directions in a second range. This universal design allows a single apparatus to perform multiple detection functions without increasing overall system complexity.
Solution Approach 2:
The measurement apparatus dynamically selects which antenna pair to use based on the target direction range. The control circuit (16) switches between the first antenna pair (31, 32) and the second antenna pair (41, 42) depending on the detection scenario, optimizing measurement accuracy for different directional ranges while managing device complexity through intelligent control.
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 configuration enhances accuracy by uniquely determining the target object's direction and distance, simplifies system installation, and reduces the need for synchronized antenna pairs, enabling more compact and efficient positioning systems.
Implementation Method 1
a target object (61) including a target-side antenna (62), a reception circuit (23B) that receives a reception signal (Sr2) having the transmission signals (St21 and St22) combined together, and a transmission circuit (23C) that returns a return signal (Sp) to the measurement apparatus (52)
Implementation Method 2
the reception signal (Sr1) to beat, and a detection circuit (15) that detects a phase difference (Δφ10) based on the beat of the reception signal (Sr1)
Data Source
AI summary
A measurement apparatus outputs from a first antenna pair transmission signals (St11) and (St12) whose phase difference (Δϕ1) changes over time. A target object simultaneously receives the transmission signals (St11) and (St12) from a target-side antenna and returns to the measurement apparatus information (Dϕ) according to the positional relationship between the target object and the measurement apparatus determined from a reception signal (Sr1). The measurement apparatus outputs from a second antenna pair transmission signals (St21) and (St22) whose phase difference (Δϕ2) changes over time. The target object simultaneously receives the transmission signals (St21) and (St22) from the target-side antenna and returns to the measurement apparatus the information (Dϕ) corresponding to the positional relationship between the target object and the measurement apparatus determined from a reception signal (Sr2). The measurement apparatus identifies a direction (θ) of the target object on the basis of these two pieces of information (Dϕ).