Linear Guide Sensor for Elastic Position Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing linear guides lack accurate measurement capabilities for elastic changes in position relative to the guide rail, excluding longitudinal direction changes, which are essential for precise positioning and force determination.
Innovation Solution
The implementation of inductively coupled receiver and emitter winding arrangements, along with incremental and absolute material measures, allows for the determination of elastic changes in position using phase-offset sinusoidal signals and temperature compensation, enabling precise position and force measurement without requiring additional sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensors are fixedly arranged on the guide carriage to measure spacing, then elastic changes in position can be measured, but the device complexity and production cost increase
Solution Approach 1:
The patent combines longitudinal position measurement and elastic position measurement functions into a single sensor system. The sensor measures both the longitudinal position (via periodic markings) and the elastic position (via amplitude modulation from guide rail spacing changes), eliminating the need for separate sensor arrangements and reducing overall device complexity.
Solution Approach 2:
The sensor system is designed to perform multiple measurement functions simultaneously. A single sensor arrangement measures both the longitudinal position of the guide carriage and the elastic changes in position relative to the guide rail, making the measurement system universal and multi-functional.
2Measurement precision
If inductive sensors with emitter and receiver winding arrangements are used, then position measurement is achieved, but the sensor requires space and has production complexity
Solution Approach 1:
The patent replaces complex mechanical sensor arrangements with an inductive measurement system. Instead of using multiple mechanical sensors that would require precise mechanical alignment and assembly, the inductive system uses electromagnetic fields to measure both longitudinal and elastic positions, significantly simplifying manufacturing and assembly processes.
3Measurement precision
If separate measurement systems are used for longitudinal position and elastic position, then each measurement can be optimized, but the overall system complexity and cost increase
Solution Approach 1:
The patent merges the functionality of separate longitudinal position sensors and elastic position sensors into a single integrated sensor system. The inductive sensor measures both types of position information simultaneously by detecting different characteristics of the magnetic field interactions, reducing the total number of sensors required.
Solution Approach 2:
The sensor system is designed with universal measurement capability, able to determine both longitudinal position (through phase analysis of periodic markings) and elastic position (through amplitude analysis of guide rail spacing effects) using the same physical sensor arrangement, eliminating the need for multiple specialized sensors.
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 solution enables accurate measurement of elastic changes, longitudinal position, and force acting on the guide carriage, while reducing production complexity and improving measurement accuracy by utilizing a single receiver winding arrangement for multiple position determinations.
Implementation Method 1
Alternating currents are fed into the emitter winding arrangement, which currents induce alternating voltages in the receiver winding arrangement
Implementation Method 2
at least one receiver winding arrangement, which differs from the emitter winding arrangement, is provided, said at least one receiver winding arrangement being inductively coupled to the at least one emitter winding arrangement
Data Source
AI summary
The disclosure relates to a linear guide having a guide rail which extends in a longitudinal direction, wherein a guide carriage is mounted on the guide rail in a linearly movable manner in the longitudinal direction, wherein at least one sensor is fitted to the guide carriage and can be used to measure an elastic position change of the guide carriage with respect to the guide rail, wherein the at least one sensor comprises at least one emitter turn arrangement which is connected to an alternating current source. According to the disclosure, at least one receiver turn arrangement which is different from the emitter turn arrangement and is inductively coupled to the at least one emitter turn arrangement is provided.