Cardan Shaft Slip Distance Detection Using Conductive Elements
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Solution Overview
Problem
Existing cardan shaft systems face challenges in accurately measuring and compensating for variable slip distances caused by vehicle axle movements, which are influenced by road conditions, vehicle type, and loading status, leading to inefficiencies in power transmission due to reliance on predictive methods that do not fully reflect real field conditions.
Innovation Solution
A device comprising a moveable and stationary element with conductive elements connected to a detection unit that measures electrical interactions, such as capacitance or induced current, to determine the slip distance change, allowing for real-time compensation of distance changes in the cardan shaft, utilizing a telescopic structure and wireless power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If predictive methods are used to determine slip distance, then device complexity is reduced, but measurement precision deteriorates because predictions do not fully reflect real field conditions
Solution Approach 1:
The patent replaces mechanical measurement systems with electrical field-based detection. Conductive elements create electrical fields that interact with slip elements, and detection units measure electrical parameter changes (capacitance, inductance, resistance) to determine slip distance, eliminating complex mechanical linkages and sensors
Solution Approach 2:
The patent introduces electrical fields as an intermediary between the slip elements and detection units. Conductive elements generate electrical fields that penetrate through non-conductive materials, allowing indirect measurement of slip distance through changes in electrical parameters without direct mechanical contact
2Measurement precision
If a wide range is provided for permissible slip distance, then adaptability is improved, but loss of information increases because the actual slip distance level cannot be measured
Solution Approach 1:
The patent creates a dynamic detection system where conductive elements and detection units work together to continuously measure slip distance in real-time. The system adapts to different vehicle types and road conditions by providing continuous feedback on actual slip distance levels, enabling dynamic adjustment rather than relying on fixed design ranges
3Measurement precision
If conductive elements are placed in different elements of the cardan shaft, then measurement precision is improved, but use of energy increases due to power supply requirements
Solution Approach 1:
The patent implements a self-powered detection system where conductive elements generate electrical fields that are detected by detection units without requiring external power sources. The slip elements themselves serve as the energy source by their movement through the electrical fields, eliminating the need for powered sensors or signal generators
Solution Approach 2:
The patent replaces active powered sensors with passive electrical field detection. Instead of using powered transducers that consume energy to generate signals, the system uses conductive elements that create electrical fields naturally, and detection units that passively measure changes in these fields caused by slip element movement
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 precise determination and compensation of slip distance changes, improving the cardan shaft's ability to maintain efficient power transmission under varying conditions, enhancing its performance across different road conditions and vehicle types.
Implementation Method 1
The capacitance values provided by the conductive elements (40) and/or the electrical values changed by the relation of the capacitance value provided by the conductive elements (40), are measured.
Implementation Method 2
measuring the electrical value change provided by the electrical interaction between the conductive elements (40)
Data Source
Figure 1
Figure 1A
Figure 1B
AI summary
The invention is a cardan shaft (1) slip distance change detection system for determining the amount of length change of the cardan shaft (1), comprising a moveable element (10) and a stationary element (20) associated with a telescopic approach to compensate for the change of distance caused by the vehicle's axle movements, comprises at least two conductive (40) elements configured as one of them connected to a fixed point, another to the moveable element (10), a power element to supply power to at least one of the conductive elements (40), a detection unit (30) for measuring the electrical value change provided by the electrical interaction between the conductive elements (40) and correlating it with the distance between the conductive elements (40).