Rotating Probe Cable Guide Minimizes Centrifugal Torque
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Solution Overview
Problem
Existing probe devices in rotating test apparatuses face challenges in adjusting probes to maintain contact and optimal distance from test pieces due to influences from rotation speed and test piece diameter, leading to increased wear and reduced throughput, particularly with large test pieces and high rotation speeds, and the centrifugal force exerted by probe cables complicates the adjustment and contact pressing force.
Innovation Solution
The probe device features a cable guide with a first end portion along the carrier arm to the rotational axis and a second end portion extending from the rotational axis, forming an angle, which minimizes the torque exerted by the probe cable on the carrier arm, allowing the probe cable to twist freely within a hollow cable guide portion parallel to the rotational axis, thus eliminating the influence of centrifugal force on the probe's position and contact pressing force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the contact pressing force of the probe onto the test piece is increased to prevent probe lift-off during high rotation speeds, then the reliability of testing is improved, but the wear of the probe increases
Solution Approach 1:
The patent extracts the cable from the source of centrifugal force (the rotating carrier arm) and guides it through the stationary cable guide along the rotational axis. This removes the harmful centrifugal force effect from the system, allowing the probe contact force to be optimized without the compensating excess force needed in conventional designs, thereby reducing probe wear while maintaining testing reliability.
2Reliability
If the rotation speed of the rotating head is reduced to decrease probe lift-off, then the reliability of testing is improved, but the productivity of the test apparatus is reduced
Solution Approach 1:
By removing the cable from the rotating carrier arm and routing it through the stationary cable guide, the patent eliminates the centrifugal force interference that caused probe lift-off. This allows the system to operate at high rotation speeds without probe detachment, thereby maintaining both testing reliability and high productivity simultaneously.
3Ease of operation
If the probe cable is guided along the carrier arm to ensure mobility, then the ease of operation is improved, but the manufacturing precision of probe position is worsened due to centrifugal force influence
Solution Approach 1:
The patent introduces a stationary cable guide as an intermediary element that mediates between the rotating carrier arm and the probe cable. The cable guide, which extends along the rotational axis, allows the cable to pass through without experiencing centrifugal force, thereby eliminating the torque and position errors that would otherwise be introduced into the probe positioning system.
4Ease of operation
If the cable guide is configured to allow free cable movement, then the ease of operation is improved, but the device complexity increases due to additional cable management components
Solution Approach 1:
The stationary cable guide serves multiple functions simultaneously: it guides the probe cable, defines the rotational axis, and eliminates centrifugal force effects. By integrating these functions into a single structural element that is already present in the rotating head assembly, the patent achieves improved cable management without proportionally increasing device complexity.
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 design simplifies the adjustment of probes, reduces wear, extends maintenance intervals, allows for maximum productivity by maintaining optimal contact pressing force, and enables easier evasion during collisions, ensuring consistent performance across varying test piece diameters and rotation speeds.
Implementation Method 1
the centrifugal force exerted by probe cables complicates the adjustment and contact pressing force
Data Source
AI summary
A probe device for a rotating head of a rotary system comprises at least one support arm that is mounted so as to be rotatable about an axis of rotation, at least one probe that is connected to the support arm, and at least one cable guide for guiding a probe cable. The cable guide comprises a first end portion that extends along the support arm, from the probe to the axis of rotation, and a second end portion that originates essentially at the axis of rotation.