Ring Laser Gyroscope Dither Motor Electrical Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Ring laser gyroscopes experience reduced lifetime at elevated temperatures due to ionic migration within the glass material, and existing solutions require significant electronic changes, adding complexity and cost to the control electronics.
Innovation Solution
The dither motor is electrically isolated from the sensor chassis, with its potential fixed to a non-reference ground potential, reducing the electric field in the laser block and minimizing ionic migration by setting the dither motor's voltage below the anode voltage, thereby extending the discharge gas life without altering the anode and cathode circuitry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the dither motor is electrically connected to the sensor chassis at reference ground potential, then the control electronics remain simple, but ionic migration occurs in the glass material reducing discharge gas life
Solution Approach 1:
The electrical connection between the dither motor and sensor chassis is segmented into isolated potential domains. The dither motor is electrically isolated from the sensor chassis and assigned a fixed non-reference ground potential, creating separate electrical zones that prevent ionic migration while maintaining mechanical functionality.
Solution Approach 2:
An electrical isolation mechanism acts as an intermediary between the dither motor and sensor chassis. This intermediary structure allows mechanical coupling while preventing direct electrical connection, enabling the dither motor to operate at a fixed non-reference ground potential without requiring complex control electronics modifications.
2Duration of action of stationary object
If the dither motor potential is fixed to non-reference ground potential, then ionic migration is reduced extending discharge gas life, but electrical isolation from chassis is required
Solution Approach 1:
The electrical system is segmented into isolated potential domains, with the dither motor electrically separated from the sensor chassis. This segmentation creates independent electrical zones that can be manufactured and assembled separately, reducing the complexity of integrating electrical isolation into the overall manufacturing process.
3Duration of action of stationary object
If existing electrode biasing solutions are implemented, then discharge gas life is extended, but significant electronic changes to control circuits are required
Solution Approach 1:
The electrical isolation of the dither motor extracts the ionic migration problem from the control electronics domain. By removing the direct electrical connection between the dither motor and sensor chassis, the solution eliminates the need for complex electrode biasing circuits while still addressing the root cause of discharge gas degradation.
Solution Approach 2:
Electrical isolation acts as an intermediary that prevents ionic migration without requiring modifications to the control electronics. This intermediary approach blocks the harmful electrical field while allowing the control circuits to remain unchanged and simple.
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 effectively prolongs the life of the discharge gas in ring laser gyroscopes by reducing ion diffusion and mobility within the laser block, achieving longer operational life without the need for re-engineering the control electronics.
Implementation Method 1
Fixing the potential of the dither motor to a non-reference ground potential alters the electric field in the glass material of the laser block, reducing ionic migration within the laser block
Implementation Method 2
reducing ionic migration within the laser block of positive ions, such as lithium ions, that react with and absorbs elements of the discharge gas within the laser block
Implementation Method 3
reducing ion diffusion and mobility within the laser block
Data Source
Figure 1
Figure 1A
Figure 2
AI summary
Systems and methods for a ring laser gyroscope with electrically isolated dither motor are provided. In one embodiment, a ring laser gyroscope, the gyroscope comprises: a laser block comprising a discharge gas filled chamber ring, a cathode, an anode and at least on other electrode; a dither motor mechanically coupled to the laser block and to a sensor chassis, wherein the laser block is secured to the sensor chassis by the dither motor; and an electrical isolator positioned between the dither motor and the laser block, wherein the electrical isolator electrically isolates the dither motor from the sensor chassis.