Rotational Encoder Spacer for Stable Torque Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems face challenges in maintaining a stable and equivalent reading distance between sensitive patterns and encoder tracks, which affects the reliability of torque determination between rotating members.
Innovation Solution
A system with a casing that rotatably mounts the member using a guide bearing, a module with an associated sensor, and a spacer to adjust the reading distance between the encoder and the sensor, ensuring precise positioning and reliable signal accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the reading distance between sensitive patterns and encoder tracks is not precisely controlled, then the system structure is simpler, but the measurement precision and reliability of torque determination deteriorate
Solution Approach 1:
A spacer element is introduced as an intermediary component between the encoder track and the sensitive pattern. This spacer serves as a mediator that precisely defines and maintains the reading distance, ensuring stable and equivalent spacing for both sensors while simplifying the overall positioning mechanism.
Solution Approach 2:
The reading distance is pre-established and fixed during manufacturing by incorporating the spacer with precise dimensions. This preliminary action ensures that the critical reading distance parameter is maintained consistently throughout operation, eliminating the need for complex active control systems.
2Reliability
If the reading distance is made stable and equivalent for both sensors, then the reliability of torque determination improves, but the device complexity increases due to precise positioning requirements
Solution Approach 1:
The spacer acts as a passive intermediary that simultaneously ensures stable and equivalent reading distances for both sensors. By providing a fixed geometric reference, it eliminates the need for complex active positioning systems while maintaining the reliability required for accurate torque determination.
Solution Approach 2:
The reading distance parameter is transformed from a variable that requires active control into a fixed geometric parameter defined by the spacer dimension. This parameter change allows the system to maintain stability and equivalence without increasing device complexity, as the spacer provides a constant physical reference.
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
The system ensures a stable and accurate reading distance, enhancing the reliability of torque determination by precisely positioning the sensitive patterns relative to the encoder tracks.
Implementation Method 1
each of the tracks presents a succession of pairs of North and South poles to form a multipolar magnetic track delivering a pseudo-sinusoidal magnetic signal
Implementation Method 2
the sensor comprising a sensitive pattern disposed at a reading distance from the track to deliver rotational information as a function of said displacement
Data Source
AI summary
The invention relates to a system for determining information about the rotation of a member (1) about an axis (R) by means of a device comprising an encoder (11, 12) carried by a body (50) connected in rotation to said member, said encoder having a track (11a, 12a) capable of emitting a periodic signal representative of the rotational displacement of said member; a sensor comprising a sensitive pattern (15, 16) arranged at a reading distance (d) from the track (11a, 12a) to deliver the information as a function of said displacement; said system comprising a casing (17) in which said member is rotatably mounted by means of a bearing (18) and, fixed in the casing (17), a module (19) on which the sensor is associated, the guide bearing (18) being carried by the module (19), a spacer (26) for adjusting the reading distance (d) being disposed between the body (50) and the guide bearing (18).FIG. 5