研究目的
To present an approach for remotely evaluating transient rotational velocities with a quadrant photo-detector (QPD) and a differential subtraction correlation (DSC) algorithm, which does not require any circular indexing plates or benchmarks.
研究成果
The proposed method is simple, fast, accurate, and effective for remotely evaluating transient rotational velocities without requiring any circular indexing plates. It is insensitive to radial fluctuation, axial shift, eccentricity, and parallel movement of the measured object, making it suitable for various applications.
研究不足
The method's resolution and accuracy are mid-ranking compared to existing methods. It requires the rotational center to be within a certain range relative to the QPD for accurate measurement.
1：Experimental Design and Method Selection:
The method involves using a QPD and a DSC algorithm to evaluate rotational velocity without circular indexing plates. The DSC algorithm is implemented by differentiating and subtracting the random output signals of two photovoltaic cells, and then integrating the absolute value of the differential subtraction signal.
2：Sample Selection and Data Sources:
A planar wooden disk with a rough surface is rotated as the measured object. The rotational velocity is set by adjusting the output voltage of a DC-micromotor and measured with a digital tachometer.
3：List of Experimental Equipment and Materials:
Equipment includes a DC-micromotor (Model 2230G0003, Faulhaber GmbH & Co. KG), adjustable DC regulated power supply (Model APS3005S-3D, Atten Technology Co.), DT-2234B Digital Tachometer (Suwei Co. Ltd.), QPD constructed by four identical photovoltaic-cells (Model A5V-38, OSI Optoelectronics Inc.), telecentric imaging system, INA128 amplifier (Texas Instruments Inc.), and AD7663 A/D converter (Analog Devices Inc.).
4：Experimental Procedures and Operational Workflow:
The wooden disk is illuminated and imaged on the QPD. The output signals are amplified, converted into digital signals, and processed to calculate the rotational velocity using the DSC algorithm.
5：Data Analysis Methods:
The DSC algorithm is used to analyze the correlation between the output signals of the QPD to determine the rotational velocity.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
