Optical Displacement Meter Dynamic Sensitivity Adjustment
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Solution Overview
Problem
Optical displacement meters face challenges in precision measurement due to saturation of output signals when receiving excessive light, limiting the effective use of the output signal region and reducing detection resolution.
Innovation Solution
The optical displacement meter divides the light-receiving element's region into valid and invalid areas, processing only the valid region for measurement, thereby assigning the entire output signal region to the valid area where light-receiving amounts need to be measured, and using high sensitivity in low light regions and low sensitivity in high light regions to prevent saturation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the light-receiving sensitivity is increased to improve detection resolution, then the detection resolution is improved, but the output signal becomes saturated when receiving excessive light
Solution Approach 1:
The patent applies dynamics by making the light-receiving sensitivity adjustable rather than fixed. The control unit dynamically changes the sensitivity of the light-receiving element based on the measured amount of received light, allowing the system to adapt between high sensitivity (for low light conditions) and low sensitivity (for high light conditions) to prevent saturation while maintaining detection resolution
Solution Approach 2:
The patent changes the parameter of light-receiving sensitivity based on the amount of received light. When the received light is small, the sensitivity is set to a first value (high); when the received light is large, the sensitivity is set to a second value (low). This parameter change resolves the contradiction between detection resolution and signal saturation
2Productivity
If the maximum value of the output signal corresponds to the maximum value of the amount of received light, then the full output signal range is utilized, but the region where excessive light is received cannot be effectively used for measurement
Solution Approach 1:
The patent dynamically adjusts the correspondence between output signal values and light-receiving amounts based on the actual measurement region. When the measured light-receiving amount is small, the maximum output signal corresponds to a larger light-receiving amount range, effectively expanding the usable measurement region and improving output signal region utilization
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
This approach enlarges the output signal region for measuring light-receiving amounts, enhancing detection resolution and preventing signal saturation, allowing for more precise measurements.
Implementation Method 1
the measurement subject is irradiated with measurement light, reflected light from the measurement subject is received by a light-receiving element, and an output signal from the light-receiving element is processed
Data Source
AI summary
Provided is an optical displacement meter capable of enlarging an output signal region with respect to a region in which a light-receiving amount needs to be measured, a method for adjusting an optical displacement meter, and an optical displacement measuring method. The optical displacement meter includes a light-receiving element in which a maximum value of an output signal is set with respect to a boundary value, which is a maximum value of a region in which the light-receiving amount needs to be measured. The entire region of the output signal of the light-receiving element can be assigned to the valid region, in which the light-receiving amount needs to be measured with an optical displacement meter, and the optical displacement meter can have an enlarged output signal region with respect to the region in which the light-receiving amount needs to be measured.