Speckle Pattern Movement Sensor Adaptive Frame Rate Control
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Solution Overview
Problem
Conventional movement information measuring devices face challenges in stably measuring movement information of target objects with high accuracy due to limitations in frame rate, exposure time, and light emission power settings.
Innovation Solution
A movement information measuring device that adjusts frame rate, exposure time, and light emission power to optimize measurement accuracy by using a processor to analyze speckle pattern images and correct movement amounts, fitting data with sine functions to minimize measurement errors, and performing magnification correction calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional movement information measuring devices use fixed frame rate and exposure time settings, then the device structure is simple, but measurement accuracy deteriorates under varying movement velocities
Solution Approach 1:
The patent implements dynamic adjustment of frame rate and exposure time based on detected movement velocity. The control unit continuously monitors movement information and automatically modifies imaging parameters to maintain optimal measurement accuracy across varying speeds, transforming the system from static to adaptive operation.
Solution Approach 2:
The system changes key parameters (frame rate and exposure time) according to movement conditions. When movement velocity changes, the control unit adjusts these parameters to keep the measurement within the optimal range, ensuring consistent accuracy without requiring manual intervention.
2Measurement precision
If the light emission power is increased to improve measurement accuracy, then measurement precision improves, but energy consumption increases
Solution Approach 1:
The control unit dynamically adjusts light emission power based on movement velocity and measurement requirements. The system increases power only when necessary for accurate measurement at high speeds, and reduces power during low-speed operation, optimizing the balance between measurement precision and energy consumption.
Solution Approach 2:
The lighting system transitions from fixed power output to dynamic control, where the emission power is continuously adjusted according to real-time movement conditions, allowing the system to consume energy efficiently while maintaining measurement accuracy.
3Measurement precision
If the frame rate is increased to capture faster movement, then measurement accuracy improves for high-velocity objects, but the data processing load increases
Solution Approach 1:
The system dynamically adjusts frame rate based on detected movement velocity. For high-velocity objects, the frame rate is increased to capture movement details accurately. For low-velocity objects, the frame rate is reduced, thereby optimizing the balance between measurement accuracy and processing load across different operating conditions.
Solution Approach 2:
The imaging parameters including frame rate are changed adaptively according to movement characteristics. The control unit modifies these parameters to match the actual measurement needs, avoiding unnecessary high processing loads during low-speed operation while ensuring sufficient frame rate for high-speed measurement.
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
Enables stable and high-accuracy measurement of movement information, reducing measurement errors and maintaining image quality across varying movement velocities and environmental conditions.
Implementation Method 1
a speckle pattern is generated on the surface of the target object and in a space near the surface. This speckle pattern is generated due to mutual interference of light reflected from the surface of the target object
Implementation Method 2
This speckle pattern is generated due to mutual interference of light reflected from the surface of the target object
Implementation Method 3
The imaging optical system forms, on the light receiving surface of the image sensor, an image of a speckle pattern generated by irradiating the inspected surface with coherent light
Data Source
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AI summary
A movement information measuring device (10) for measuring movement information of a target object, includes a light source (101), an image sensor (120), and a processing device (131). The light source (101) emits light onto the target object. The image sensor (120) captures an image of a speckle pattern generated by light emitted from the light source (101) and reflected by the target object. The processing device (131) obtains movement information of the target object based on a movement amount of the speckle pattern, and adjusts a frame rate and an exposure time in the image sensor (120), and light emission power of the light source (101) based on a movement velocity of the target object.