Optical Voltage Sensor Vibration Resistance Cylindrical Base
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Solution Overview
Problem
Optical voltage measuring apparatuses face challenges in achieving high precision voltage measurements due to vibrations, which cause angular deviations and failures in light detection, especially in environments with high-voltage equipment that undergo large vibrations, leading to inaccurate voltage readings.
Innovation Solution
The optical voltage sensor employs a combination of polarizer, retardation plate, and electro-optical device secured within cylindrical frames with a thick adhesive to absorb vibrations, ensuring the optical axis remains stable and perpendicular to the incoming light, preventing angular deviations and maintaining accurate measurements even under 1,000 G vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If devices are adhesive bonded onto a flat base plate, then the structure is simple and easy to manufacture, but vibrations cause angular deviations that lead to measurement errors
Solution Approach 1:
The patent replaces the flat base plate with a cylindrical base having a curved surface. The optical devices are bonded to this curved surface at specific angular intervals, which fundamentally changes how vibrations affect the system. The cylindrical geometry provides rotational symmetry that compensates for vibration-induced angular deviations, maintaining measurement precision while preserving ease of manufacture through simple cylindrical shaping.
Solution Approach 2:
The patent introduces asymmetric positioning of optical devices on the cylindrical surface at specific angular intervals (e.g., 90 degrees apart). This asymmetric arrangement creates a balanced configuration where vibration effects on individual devices are compensated by the collective response of the array, preventing systematic measurement errors while maintaining simple bonding procedures.
2Reliability
If optical devices are arranged on a flat base plate with elastic body, then vibrations are absorbed, but the elastic body thickness must be precisely controlled to prevent angular deviations
Solution Approach 1:
The cylindrical base geometry eliminates the need for precise adhesive thickness control. The curved surface naturally accommodates vibration-induced movements while maintaining proper optical alignment. Devices bonded at different angular positions on the cylinder experience different vibration effects that compensate each other, making the system tolerant to variations in adhesive layer thickness.
Solution Approach 2:
The patent changes the geometric parameter of the base from flat to cylindrical, which fundamentally alters the vibration dynamics. This parameter change transforms the system from being sensitive to adhesive thickness into being tolerant of thickness variations, as the cylindrical geometry provides a larger effective bonding area and distributes stress more evenly.
3Volume of moving object
If devices are arranged in a compact configuration, then the apparatus size is reduced, but vibration-induced angular deviations increase measurement errors
Solution Approach 1:
The cylindrical arrangement allows compact packaging of multiple optical devices in three-dimensional space while maintaining proper separation and alignment. The curved surface of the cylinder provides natural spacing between devices bonded at different angular positions, preventing vibration-induced collisions while keeping the overall apparatus volume small.
Solution Approach 2:
The patent transitions from a two-dimensional flat arrangement to a three-dimensional cylindrical configuration. This dimensional change allows devices to be distributed in both radial and angular directions, achieving compactness in the planar view while maintaining adequate separation through the third dimension (height/axial direction of the cylinder).
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 configuration allows for high precision and stable voltage measurements by effectively absorbing vibrations and maintaining the optical axis alignment, thereby preventing angular deviations and ensuring accurate voltage readings in high-vibration environments.
Implementation Method 1
the devices 14 to 19 arranged on a base plate 25, with an elastic body in between, the elastic body absorbing vibrations to prevent the devices from being vibrated
Implementation Method 2
The electro-optical device 17 is configured to polarize incoming light from the retardation film 16, in accordance with an electro-optical effect due to the imposed voltage 17a
Implementation Method 3
a light source driver 11 under control to have a light source 12 emit flux of light, which is conducted through an optical fiber 13a to a light sending collimator 14
Data Source
Figure 1
Figure 2(a)~4(b)
Figure 5
AI summary
A polarizing optical system (15, 16) is disposed perpendicular to an optical axis of incoming light from a light source (12), having the optical axis (12) as a center axis, and configured for polarization of incoming light to a prescribed reference state, an electro-optical device (17) is disposed perpendicular to the optical axis, having the optical axis as a center axis, and adapted, as a voltage to be measured is imposed thereon, to respond to the imposed voltage by polarizing light polarized by the polarizing optical system (15, 16), and an analyzer (18) is disposed perpendicular to the optical axis, having the optical axis as a center axis, and adapted for detection of light polarized by the electro-optical device (17), to irradiate a detector (21) configured for conversion of incoming light into an electric signal.