Wireless Device Synchronization via Phase Offset Correction
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Solution Overview
Problem
Current automatic hair clipping systems face challenges in achieving accurate position measurements due to the lack of available phase information when the hair clipper and control box are wireless devices connected to separate processing units, requiring user calibration that can lead to incorrect measurements if done improperly, and often necessitate additional hardware for synchronization.
Innovation Solution
A method for synchronizing a first device and a second device via a wireless link by generating a synchronization signal with a sequence of signals, processing relative phase information, and correcting phase offsets to achieve accurate synchronization without user interaction or additional hardware, using multiple transmitter and receiver coils to determine the correct position and orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If user calibration is performed to obtain initial phase information, then phase information can be obtained, but measurement accuracy deteriorates if user holds device at wrong position
Solution Approach 1:
The system performs automatic calibration without user intervention. The processing unit automatically determines initial phase information by analyzing signals exchanged between devices, eliminating the need for user-held calibration positions and associated errors.
Solution Approach 2:
The system performs preliminary phase calibration automatically during device connection or initialization. The processing unit calculates initial phase information before actual hair clipping operations begin, ensuring accurate measurements from the start without requiring user intervention.
2Reliability
If additional hardware components are added for clock synchronization, then synchronization reliability improves, but manufacturing cost increases
Solution Approach 1:
The existing wireless communication hardware performs dual functions: both data transmission and phase synchronization. The same transmitter and receiver coils used for EMF tracking also exchange synchronization signals, eliminating the need for dedicated synchronization hardware.
Solution Approach 2:
The patent uses electromagnetic field signals as an intermediary carrier to transmit both position information and synchronization data. The EMF signals serve as a mediator that conveys phase information between devices without requiring separate synchronization hardware.
3Adaptability or versatility
If wireless link is used between hair clipper and control box, then system flexibility improves, but phase information availability deteriorates
Solution Approach 1:
The system implements bidirectional signal exchange where the control box transmits reference signals to the hair clipper, and the hair clipper returns received signals. The processing unit uses this feedback loop to calculate phase information, maintaining wireless flexibility while recovering phase data.
Solution Approach 2:
The system performs preliminary phase calibration during wireless connection establishment. The processing unit determines initial phase information by analyzing the phase relationship between transmitted and received signals before actual operation begins, ensuring phase availability throughout wireless operation.
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 method enables automatic and error-prone synchronization of wireless devices in hair clipping systems, eliminating the need for user calibration and additional hardware, ensuring accurate position measurements and reducing manufacturing costs.
Implementation Method 1
generating, at the first device, a synchronization signal comprising a sequence of signals... transmitting the sequence of signals from the first device to the second device
Implementation Method 2
performing, at the second device, signal processing of the sequence of signals to determine relative phase information of each of the signals in the sequence
Data Source
AI summary
A method for synchronizing a first device and a second device, the first device and the second device being connectable via a wireless link. The method comprises generating (202), at the first device, a synchronization signal comprising a sequence of signals, wherein each of the signals in the sequence has a first frequency; transmitting (204) the sequence of signals from the first device to the second device; performing (206), at the second device, signal processing of the sequence of signals to determine relative phase information of each of the signals in the sequence; and synchronizing (208), based on the determined relative phase information, the first device and the second device by correcting phase offset of subsequent individual signals transmitted from the first device to the second device.