Magnetic Sensor Automatic Sampling Timing Correction
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Solution Overview
Problem
Existing magnetic sensors face challenges in maintaining consistent sensitivity due to environmental changes and manufacturing variations, which affect the peak sampling timing and result in fluctuations in sensitivity and noise characteristics.
Innovation Solution
A magnetic sensor with an automatic correction circuit that adjusts the rise timings of the magneto-sensitive body clock and the sampler clock based on the sampling voltage, using a delay synchronization circuit, logic circuit, and clock generation circuit to optimize sampling timing without manual adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If delay circuit adjustment is used for peak sampling timing, then sampling timing can be adjusted, but sensitivity varies due to environmental changes and manufacturing variations
Solution Approach 1:
The system performs self-adjustment by automatically detecting the peak timing of the induced voltage waveform and self-correcting the sampling timing without requiring external manual adjustment. The automatic correction circuit monitors the actual peak timing and adjusts the sampling clock phase to match, enabling the system to adapt to environmental changes and manufacturing variations autonomously.
Solution Approach 2:
The system implements feedback by continuously monitoring the induced voltage waveform peak timing and using this information to adjust the sampling timing. The automatic correction circuit receives feedback about the actual peak position and modifies the sampling clock accordingly, creating a closed-loop control system that maintains optimal sampling timing despite external disturbances.
2Measurement precision
If manual adjustment is used for sampling timing, then initial calibration can be performed, but adjustments are required when environmental conditions change
Solution Approach 1:
The system performs self-adjustment by automatically detecting the peak timing of the induced voltage waveform and self-correcting the sampling timing without requiring external manual adjustment. The automatic correction circuit monitors the actual peak timing and adjusts the sampling clock phase to match, enabling the system to adapt to environmental changes and manufacturing variations autonomously.
Solution Approach 2:
The system performs preliminary automatic correction during the initialization phase to establish optimal sampling timing before actual measurements begin. This preliminary action ensures the system starts in an optimized state and continues to self-correct during operation, eliminating the need for repeated manual adjustments.
3Measurement precision
If delay circuit components are added for timing adjustment, then sampling timing can be corrected, but device complexity and cost increase
Solution Approach 1:
The automatic correction circuit serves multiple functions: it detects the peak timing of the induced voltage waveform, generates correction signals, and adjusts the sampling clock phase. By consolidating these functions into a single integrated circuit, the design avoids adding separate delay circuit components while achieving timing correction.
Solution Approach 2:
The system replaces traditional mechanical or passive RC delay circuit adjustment methods with an active electronic control approach. Instead of physically adjusting delay components or using passive timing elements, the system uses digital or active electronic timing control that can be dynamically adjusted without changing physical circuit topology.
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
The magnetic sensor can automatically correct the optimum sampling timing for synchronous detection, maintaining high detection accuracy and stability despite environmental changes or manufacturing variations, without increasing costs.
Implementation Method 1
a coil disposed to obtain an induced voltage proportional to the external magnetic field
Data Source
AI summary
A magnetic sensor includes a magneto-sensitive body whose electromagnetic properties change under an action of an external magnetic field, a coil disposed to obtain an induced voltage proportional to the external magnetic field, a sampler configured to sample the induced voltage generated in the coil and obtains a sampling voltage, and an automatic correction circuit configured to relatively adjust a rise timing of a magneto-sensitive body clock for driving the magneto-sensitive body and a rise timing of a sampler clock for driving the sampler according to the sampling voltage.