Detector Catch Release Mechanism Sampling Jitter
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Solution Overview
Problem
Detectors with mechanical vibrators face accuracy reduction due to sampling jitter in mechanical resonance-based sensors, which is exacerbated by the need for large capacitor elements in low-pass filters.
Innovation Solution
A detector design incorporating a mechanical vibration mechanism with a first and second mechanical vibrator, a moving average filter that performs analog moving average processes without requiring large capacitor elements, and control circuitry to synchronize the vibration with a clock signal, reducing sampling jitter and improving detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a low-pass filter with a large capacitor element is used to remove quadrature error, then the filtering performance is improved, but the device size and complexity increase
Solution Approach 1:
The patent replaces the traditional electronic low-pass filter with a digital moving average filter implemented through software processing. This substitution eliminates the need for large capacitor elements while achieving the same quadrature error removal function, directly resolving the contradiction between filtering performance and device complexity
Solution Approach 2:
The patent changes the filtering approach from analog (electronic circuit with capacitors) to digital (software-based moving average calculation). This parameter change in the filtering methodology allows achieving equivalent or superior filtering performance without the physical constraints of large capacitor elements
2Device complexity
If an analog moving average filter is used to avoid large capacitor elements, then the device size is reduced, but sampling jitter increases leading to reduced detection accuracy
Solution Approach 1:
The patent applies preliminary action by performing synchronous detection using the first mechanical vibrator's signal as a reference before applying the moving average filter. This pre-synchronization aligns the sampling timing with the vibration cycle, eliminating sampling jitter and preserving detection accuracy while using the compact digital filter
Solution Approach 2:
The patent uses feedback by employing the detection signal from the first mechanical vibrator as a reference for synchronous detection in the second mechanical vibrator's signal processing. This feedback mechanism ensures precise timing synchronization, preventing sampling jitter and maintaining high detection accuracy in the digital filtering process
3Measurement precision
If mechanical resonance is used for detection, then the sensitivity is improved, but sampling jitter occurs reducing measurement precision
Solution Approach 1:
The patent applies periodic action by synchronizing the sampling and processing operations with the periodic vibration cycles of the mechanical vibrators. The moving average filter processes signals over complete vibration periods, and synchronous detection uses the periodic reference signal, ensuring that sampling occurs at consistent phases and eliminating jitter while preserving the high sensitivity of mechanical resonance detection
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 solution effectively reduces sampling jitter, enhancing the signal-to-noise ratio and maintaining detection accuracy while allowing for downsizing of the filter, thus improving the overall performance of the detector.
Implementation Method 1
a first mechanical vibrator which vibrates in at least a first direction, and a second mechanical vibrator which is mechanically connected to the first mechanical vibrator and vibrates in at least a second direction perpendicular to the first direction
Implementation Method 2
This type of detector uses mechanical resonance to detect a physical quantity (e.g., angular velocity)
Data Source
AI summary
According to one embodiment, a detector is disclosed. The detector has a mechanism with first and second vibrators which vibrate in first and second directions. Circuits detect output first and second signals conforming to the detected positions of the vibrators. A detection circuit detects second signal using the first signal as a reference of synchronous detection and outputs a detection signal. A filter continues a moving average process on the detection signal for a period set based on the first signal. A controller circuitry controls the mechanism to causes the first vibrator to start vibrating in the first direction in synchronization with a clock signal.