Viaxl: A Solution of a Low-Cost Real-Time Visual Accelerometer Based on Laser Speckle Optical Flow Detection
Zhitian Li1, Wuhao Yang1, Xingyin Xiong1
1The State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Science, Beijing 100081, China.
Sensors (Basel, Switzerland)
|December 11, 2020
Summary
A new visual accelerometer system, Viaxl, uses laser speckle optical flow for non-contact acceleration measurement. This low-cost, simple system offers real-time, non-destructive detection with stable performance for various applications.
Area of Science:
- Optical Measurement
- Sensor Technology
- Instrumentation
Background:
- Non-contact and non-destructive acceleration measurement is crucial for applications in medical electronics and vibration monitoring.
- Existing laser-based methods often lack cost-effectiveness and simplicity.
- There is a need for accessible and reliable non-contact acceleration sensing solutions.
Discussion:
- The proposed Viaxl system utilizes laser speckle optical flow detection for acceleration measurement.
- It offers a low-cost and simple implementation compared to traditional laser systems.
- The system integrates a commercial camera and a low-cost laser pointer.
Key Insights:
- Viaxl achieves real-time, non-contact acceleration measurement with moderate and stable performance.
- Experimental results show measurement nonlinearity better than 1.3% and a signal-to-noise ratio up to 31 dB.
- The system possesses a theoretical bandwidth of 1150 Hz.
Outlook:
- Viaxl demonstrates significant potential for diverse applications requiring non-contact acceleration detection.
- It presents a novel technical approach for non-contact acceleration sensing.
- Further development could expand its utility in specialized scenarios.
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