3D Positioning Using Pulsed Signal Strength Trilateration
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Solution Overview
Problem
Current methods for 3D positioning of electromagnetic and radio frequency sources, particularly in short-range applications, face challenges such as complexity, high cost, and limited range due to multi-path fading and the need for complex image processing, which hinder real-time control and high-resolution positioning in gaming and other applications.
Innovation Solution
A system using a transmitter that sends a pulsed signal with varying pulse strength, allowing receivers to determine the range and position of the transmitter based on signal strength, utilizing an electronic circuit to process the signal and calculate the location through comparison of different signal versions received by multiple receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If planar sensor arrays with image processing algorithms are used for 3D positioning, then positioning capability is achieved, but system complexity and cost increase
Solution Approach 1:
The patent extracts the essential ranging function from complex imaging systems by using a single sensor to measure signal strength variations. Instead of using full planar sensor arrays with image processing, the invention isolates the key parameter (signal strength) needed for positioning and uses it directly through trilateration, eliminating unnecessary complexity while maintaining positioning capability
Solution Approach 2:
The patent replaces mechanical imaging systems (lenses, mirrors, multiple sensors) with an electronic signal processing approach. By substituting optical/mechanical components with electronic signal strength measurements and computational trilateration, the system achieves 3D positioning with simpler, more cost-effective components
2Measurement precision
If imaging systems with scanning algorithms are used for target tracking, then target identification is achieved, but signal processing time increases
Solution Approach 1:
The patent extracts only the essential information needed for positioning (signal strength) from the transmitted signal, ignoring unnecessary components. This selective extraction eliminates complex image processing and scanning algorithms, enabling real-time positioning with minimal processing time while maintaining sufficient accuracy for gaming applications
Solution Approach 2:
The patent uses partial action by measuring only signal strength rather than performing complete image processing. This partial measurement approach provides sufficient positioning information without the time cost of full imaging, achieving a practical balance between accuracy and processing speed for real-time control
3Length of stationary object
If LIDAR systems are used for long-range tracking, then ranging capability is achieved, but short-range performance is degraded by multipath effects
Solution Approach 1:
The patent changes the operating parameters by using higher frequencies and coded modulations to reduce multipath effects. By adjusting these parameters and using signal strength variations over time, the system achieves reliable short-range positioning accuracy despite the presence of reflected waves in the environment
4Area of stationary object
If multiple sensors with wide FOV are used for 3D location, then positioning coverage is improved, but system cost and complexity increase
Solution Approach 1:
The patent makes a single sensor perform multiple functions by using it to measure signal strength at different times and positions. Instead of requiring multiple simultaneous sensors for wide coverage, the single sensor is used sequentially to gather sufficient data for trilateration, achieving wide effective coverage with minimal components
Solution Approach 2:
The patent uses periodic action by having the transmitter send repeated signal bursts and the single sensor take multiple measurements over time. This temporal sampling approach allows one sensor to effectively cover the same ground that would require multiple sensors simultaneously, reducing component count while maintaining positioning capability
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 approach enables accurate and efficient 3D positioning with high resolution and low latency, suitable for real-time applications, achieving a range of up to 30 meters with an accuracy of 1 cm RMS error within 10 meters and 1 mm RMS error within 3 meters, and supports multiple users and devices in gaming and virtual reality environments.
Implementation Method 1
A method and apparatus for ranging finding, orienting, and/or positioning of single and/or multiple devices... locate electromagnetic waves in three-dimensions rely on intensity, wavelength, and phase measurements
Data Source
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AI summary
A method and apparatus for ranging finding of signal transmitting devices is provided. The method of signal reception is digitally based only and does not require receivers that are analog measurement devices. Ranging can be achieved using a single pulse emitting device operating in range spaced relation with a minimum of a single signal transmitter and a single digital receiver and processing circuitry. In general a plurality of transmitting pulsed emitters may be ranged and positioned virtually simultaneously in 3-dimensions (XYZ coordinates) using a configuration of a plurality of digital receivers arranged in any fixed 3-dimensional configuration. Applications may involve at least one single transmitter to receiver design to determine range, or at least one transmitted reflecting signal off from an object to determine range.