Optical Axis Alignment Mechanism for Transmission Sensor Devices
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Solution Overview
Problem
Existing sensor devices with transmission type sensor pairs, which include a light emitting unit and a light receiving unit, face difficulties in aligning and adjusting the optical axes, particularly when the position of the object to be detected changes, leading to time-consuming adjustments.
Innovation Solution
A sensor device with an optical axis alignment mechanism that includes a fixing frame and a movable bracket, allowing for independent alignment and position adjustment of the optical axes before mounting to a machine frame, using a combination of fixing and movable brackets with oscillation and adjustment holes for precise alignment and position setting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If optical axis alignment is performed using multiple adjustment elongated holes in fixing brackets of both light emitting unit side and light receiving unit side, then alignment capability is improved, but adjustment complexity and time consumption increase
Solution Approach 1:
The adjustment mechanism is segmented into two independent parts: (1) optical axis alignment adjustment using elongated holes in fixing brackets, and (2) height position adjustment using elongated holes in the fixing frame. This segmentation allows each adjustment function to be performed independently without interfering with the other, reducing overall adjustment complexity while maintaining alignment precision.
Solution Approach 2:
The patent performs optical axis alignment adjustment before mounting the sensor device to the machine frame. By completing the alignment adjustment in advance using the fixing frame, the actual installation process is simplified and time-consuming adjustments are eliminated during mounting.
2Measurement precision
If separate adjustments are performed for optical axis alignment and height position adjustment, then detection accuracy for different object positions is improved, but total adjustment time increases
Solution Approach 1:
The fixing frame incorporates movable brackets with elongated holes that allow dynamic adjustment of the light emitting unit and light receiving unit positions. This dynamic structure enables both optical axis alignment and height position adjustment to be performed flexibly, and the adjustments can be completed before final mounting, reducing on-site adjustment time.
Solution Approach 2:
Both optical axis alignment and height position adjustments are performed in advance during the assembly phase before mounting the sensor device to the machine frame. This preliminary adjustment approach ensures detection accuracy is optimized while eliminating time-consuming adjustments during the actual installation process.
3Stability of the object's composition
If the sensor device structure includes fixed fixing brackets for mounting, then structural stability is improved, but ease of adjustment deteriorates
Solution Approach 1:
The fixing frame incorporates movable brackets with elongated holes instead of completely fixed structures. These movable brackets provide adjustment capability during assembly while maintaining structural stability once positioned. The elongated holes allow positional adjustment, and after adjustment, the components can be secured to maintain stability during operation.
Solution Approach 2:
The fixing structure is segmented into adjustable components (brackets with elongated holes) and fixed components (mounting points on machine frame). This segmentation allows the structure to provide both adjustment ease during assembly and structural stability during operation, as the adjustable parts can be positioned and then secured.
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 solution enables efficient and accurate alignment and position adjustment of the optical axes, reducing the time required for setup and allowing for quicker mounting of the sensor device to the recording apparatus, thereby improving installation efficiency.
Implementation Method 1
transmission type sensor pairs having a light emitting unit (33) and a light receiving unit (35)
Implementation Method 2
light receiving unit and a light emitting unit has been used in order to detect lifting, bending, or wrinkle of a recorded material
Data Source
AI summary
A sensor device according to the invention includes a transmission type sensor pair that includes a light emitting unit and a light receiving unit, an optical axis alignment mechanism that aligns optical axes of the light emitting unit and the light receiving unit, and a fixing frame that is adjusted by the optical axis alignment mechanism, and in which the sensor pairs are fixed in a state in which the optical axes of the light emitting unit and the light receiving unit are aligned.