Detector with Offset Stylus Axis for Automatic Multi-Surface Measurement
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Solution Overview
Problem
Conventional roundness measuring machines require manual attitude changes of the stylus, which are time-consuming and difficult to automate, leading to increased complexity and costs due to the need for protrusions and complex control systems.
Innovation Solution
A detector system with a stylus held by a holder that is swingably mounted on a rotating shaft, allowing the stylus axis to be parallel to the body axis and offset in a direction orthogonal to the rotating shaft, enabling automatic measurement of multiple surfaces without interference, using a cylindrical body and various contact shapes for precise displacement detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual attitude change of the stylus is performed, then measurement of multiple surfaces can be achieved, but measurement time increases and automation is difficult
Solution Approach 1:
The detector body is designed to be rotatable about its body axis, allowing dynamic adjustment of the detector's orientation. This enables the stylus to automatically adapt to different measurement surfaces (outer peripheral surface, inner surface, upper surface) without manual intervention, resolving the contradiction between measurement versatility and time consumption
Solution Approach 2:
The detector is designed with a universal structure where the single detector body can measure multiple types of surfaces (outer, inner, upper surfaces) by rotation. The stylus can contact different surfaces by rotating the detector body to appropriate angles, making one device perform multiple measurement functions without requiring separate detectors for each surface type
2Extent of automation
If protrusion is added for automatic attitude change, then automation is improved, but device complexity and cost increase
Solution Approach 1:
The detector body automatically changes its own attitude by rotating about its body axis under control signals. The detector serves itself to adjust the stylus orientation without requiring external protrusions or mechanical assistance devices, achieving automation while keeping the system simple
Solution Approach 2:
The invention removes the unnecessary protrusion component from the system. Instead of adding a protrusion to force attitude change, the solution extracts this redundant element and achieves attitude change through direct rotation of the detector body, reducing device complexity while maintaining automation
3Object-affected harmful factors
If stylus axis is parallel to body axis with offset, then interference between body and object is prevented, but structural complexity increases
Solution Approach 1:
The holder structure is designed asymmetrically with the stylus axis parallel to but offset from the body axis in the first direction. This asymmetric positioning creates a built-in clearance that prevents the detector body from colliding with the measurement object during rotation, while the offset distance is optimized to be minimal for simplicity
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 automatic measurement of multiple surfaces without interference, reducing measurement time and maintaining high precision despite contact wear, while simplifying the system and reducing costs by eliminating the need for manual attitude changes and complex control systems.
Implementation Method 1
a measuring part configured to swingably hold the holder with a rotating shaft and detect a displacement of the holder
Data Source
AI summary
There are provided a detector, a surface property measuring machine and a roundness measuring machine for automatically measuring a plurality of surfaces to shorten the time necessary for measurement. This problem is solved by a detector provided with a stylus for supporting a contact coming in contact with a surface of an object to be measured, a holder configured to hold the stylus, a measuring part configured to hold the holder to be capable of swinging by a rotating shaft and detect a displacement of the holder, and a body configured to accommodate the measuring part, wherein the holder holds the stylus such that a stylus axis as an axis of the stylus and a body axis as an axis of the body are in parallel, and the stylus axis and the body axis are offset in a first direction perpendicular to the body axis and the rotating shaft.