Segmented Absolute Track Pole Magnetization
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Solution Overview
Problem
Existing length or position measuring systems require a large number of sensors to evaluate pseudo-random-coded tracks, leading to increased housing length and production costs, and limited measurable length due to binary coding.
Innovation Solution
The system divides absolute tracks into sub-tracks or segments with varying pole sizes and magnetization strengths, allowing for analog quantization of logical values, reducing the number of sensors needed and increasing measurable length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If binary coding with single poles is used, then the system is simple to implement, but the number of sensors required increases and housing length increases
Solution Approach 1:
The patent divides each pole into multiple segments with different magnetization strengths (e.g., strong, medium, weak). This segmentation allows each sensor to detect multiple quantization levels within a single pole, reducing the number of sensors needed while maintaining coding capacity. The segmented pole structure enables analog quantization without increasing housing length.
Solution Approach 2:
The patent changes the magnetization parameter of pole segments to create different field strengths. By varying the magnetization strength within segments of each pole, the system encodes multiple logical values in a single pole position, reducing the sensor array length while preserving information density.
2Measurement precision
If more sensors are used to evaluate PRC tracks, then measurement precision improves, but production costs increase
Solution Approach 1:
By segmenting poles into regions of different magnetization strength, the patent enables each sensor to capture multiple quantization levels simultaneously. This reduces the total sensor count needed to achieve the same measurement precision, directly lowering production costs while maintaining accuracy.
Solution Approach 2:
The patent uses parameter changes in magnetization strength to encode additional information that would otherwise require multiple sensors. This allows the system to achieve high measurement precision with fewer sensors, reducing both component costs and assembly complexity.
3Device complexity
If binary coding is used, then the system is simpler, but measurable length is limited
Solution Approach 1:
The patent applies parameter changes by varying magnetization strength within pole segments to create analog quantization levels. This allows the system to encode more information within the same physical space, extending the measurable length without increasing system complexity.
4Reliability
If pole width is doubled for better sensing, then air gap can be increased, but the number of poles required for a given length increases
Solution Approach 1:
The patent segments each pole into multiple regions with different magnetization strengths. This allows the system to maintain narrow pole widths (reducing the number of poles needed for a given length) while still achieving reliable sensing through the enhanced signal from segmented magnetization patterns.
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 reduces the number of sensors required, decreases housing length and production costs, and enables longer measurable lengths with improved sensing accuracy at greater distances, achieving a cost and size advantage.
Implementation Method 1
a preferably magnetically encoded measuring body (100, 400, 500) having an incremental track (100) and at least one absolute track (105, 405)
Data Source
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AI summary
In a length or position measuring system which has an at least locally essentially linear measuring body (400, 405) and at least one sensor to be moved relative to the measuring body (400, 405), wherein the measuring body (400, 405) comprises an incremental track (400) and at least one absolute track (405) and wherein the incremental track (400) and the at least one absolute track (405) have poles (435) arranged in the longitudinal direction of the measuring body (400, 405), it is particularly provided that the poles (435) of the at least one absolute track (405) form at least two areas with different field strength or signal amplitude in the sensor.