Guide Carriage Sensor Pair Layout for Accurate Load Measurement
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Solution Overview
Problem
Existing guide carriages with piezoresistive sensor layers face measurement inaccuracies due to temperature sensitivity and deformation of the guide carriage or track insert, requiring complex compensation methods.
Innovation Solution
A guide carriage with a pressure-sensitive sensor device featuring sensor pairs arranged in the rolling direction, where the difference in sensor signals dependent on disturbance variables is minimized, allowing for load measurement without additional apparatuses, using a tuple of sensors with pairs configured to eliminate disturbance variable influences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If piezoresistive sensor layers are used to measure loads on the guide carriage, then measurement sensitivity is improved, but measurement precision deteriorates due to temperature sensitivity and deformation influences
Solution Approach 1:
The sensor layer is segmented into multiple independent sensor elements arranged in tuples along the rolling direction. Each tuple contains multiple sensors that can be individually evaluated to distinguish between load-dependent signals and disturbance variable signals through comparative analysis.
Solution Approach 2:
The patent introduces sensor tuples as an intermediary structure between the piezoresistive sensor layer and the load measurement process. By arranging multiple sensors in tuples and evaluating their signals collectively, the system can separate load-dependent portions from disturbance variable portions, effectively using the tuple structure as a mediator to eliminate measurement errors.
2Measurement precision
If reference sensors are added outside the roller path to compensate for temperature influence, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The sensor tuples serve multiple functions simultaneously: they measure load forces, compensate for temperature influences, and detect deformation effects. By making the existing sensor structure multi-functional through proper arrangement and evaluation methods, additional reference sensors outside the roller path become unnecessary, avoiding increased device complexity.
Solution Approach 2:
The sensor system performs its own temperature compensation and disturbance variable elimination through the differential evaluation of sensor signals within each tuple. The sensors themselves provide the data needed for compensation, and the evaluation process automatically separates load-dependent from disturbance-dependent signals, making the system self-sufficient without requiring external reference 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
Enables accurate load measurement by eliminating the influence of disturbance variables such as deformation and temperature, simplifying the compensation process and improving measurement precision.
Implementation Method 1
piezoresistive thin layer sensors are arranged on a steel insert of a roller bearing
Data Source
AI summary
There is disclosed a guide carriage for roller-mounted guiding on a guide rail having at least one carriage roller track on which roller members which can be arranged between guide carriages and a guide rail can be rolled, wherein the carriage roller track, in particular in order to establish a load acting on the guide carriage or wear, is associated with a pressure-sensitive sensor device which can be loaded by the roller members and which has sensors which are arranged in a manner distributed in the rolling direction and which in order to evaluate the sensor signals thereof can be connected in terms of signaling to an evaluation device. There are further disclosed a route guide having such a guide carriage and a method for establishing the load on the guide carriage.