Emitter Positioning via Dual-Signal Wave Detection
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Solution Overview
Problem
Accurately and precisely determining the location of an emitter, such as in gaming systems, is challenging due to issues like time-of-flight measurements being affected by the inertia of piezoelectric ultrasonic transmitters and directional emissions, leading to missed waves and inaccurate positioning.
Innovation Solution
A method involving emitting first and second signals and determining whether they are lost or gained waves at each receiver, which helps in calculating the emitter's position more accurately by establishing time differentials and adjusting for signal strength variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If time-of-flight measurement is used to determine emitter location, then positioning can be achieved, but measurement accuracy deteriorates due to missed initial waves caused by piezoelectric inertia
Solution Approach 1:
The system performs preliminary actions by emitting multiple test waves before the actual measurement wave to warm up the piezoelectric elements and establish baseline detection thresholds. This preliminary action ensures that when the measurement wave is emitted, the transmitters are already in a stable state, preventing missed detections due to inertia.
Solution Approach 2:
The system implements feedback mechanisms where receivers continuously monitor wave arrivals and provide feedback to the central processing unit. When waves are missed or detected late, the system adjusts timing measurements and compensates for detection delays, improving overall measurement accuracy and reliability.
2Power
If piezoelectric ultrasonic transmitter is used, then signal emission is achieved, but directional emission patterns cause signal strength to vary significantly with location and orientation changes
Solution Approach 1:
The system segments the signal emission function by using multiple transmitters arranged in different orientations and positions. Each transmitter handles a specific directional sector, ensuring that at least one transmitter maintains optimal alignment with any receiver, thereby maintaining consistent signal strength across all directions.
Solution Approach 2:
The system dynamically adjusts emission parameters based on detected signal conditions. When signal strength varies due to directional constraints, the system modifies transmission power, frequency, or timing to compensate, ensuring consistent positioning accuracy regardless of emitter-receiver orientation.
3Measurement precision
If initial waves are missed due to piezoelectric inertia, then time-of-flight measurement is overstated, but correcting for this requires additional measurement waves and complex processing
Solution Approach 1:
The system uses periodic emission of multiple waves at known intervals. By emitting waves in regular sequences and tracking which waves are detected at each receiver, the system can identify missed waves through pattern recognition and calculate accurate time-of-flight measurements without requiring complex real-time processing of each individual wave.
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 enhances the accuracy of emitter positioning, reducing measurement errors and providing precise spatial data for motion control systems, allowing for more precise user input in gaming applications.
Implementation Method 1
In systems with a piezoelectric ultrasonic transmitter, the piezoelectric ultrasonic transmitter does not instantly emit an ultrasonic wave upon receiving a command signal
Implementation Method 2
certain methods for determining the location of the emitter rely upon time-of-flight of a pulse from the emitter to a receiver
Data Source
AI summary
A method for determining a position of an emitter relative to a plurality of receivers is provided. The method includes emitting first and second signals at the emitter and receiving the first and second signals at each receiver of the plurality of receivers. The method also includes steps for establishing a first detected wave of the second signal as a lost wave or a gained wave for each receiver of the plurality of receivers. Detecting lost and gained waves assists with increasing the accuracy of a calculated location of the emitter relative to the plurality of receivers.