Parallel Sensor Members for Continuous Torque Detection
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Solution Overview
Problem
Existing sensor devices face challenges in accurately detecting torque on circular bodies, particularly when installed in output members that rotate beyond 360 degrees or undergo continuous rotation, due to wiring restrictions and decreased sensitivity when fixed in place.
Innovation Solution
A sensor device with multiple sensor members attached in parallel to the detection object, connected to an estimation unit that calculates torque based on detected values, allowing for accurate estimation of torque without the limitations of serial connections and wiring restrictions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensor members are connected in series to detect torque on a circular body, then the torque can be accurately detected when the circular body is stationary or rotates limitedly, but the detection accuracy decreases and wiring becomes restricted when the circular body rotates continuously beyond 360 degrees
Solution Approach 1:
The sensor device divides the torque detection function into multiple independent sensor members (first, second, third, and fourth sensor members) positioned at different locations around the circular body. Each sensor member independently detects torque in its specific region, and the results are combined to achieve comprehensive and accurate torque detection during continuous rotation, eliminating the wiring restrictions of series connections.
Solution Approach 2:
The patent transitions from a single-dimension serial connection approach to a multi-dimensional parallel detection system. By positioning sensor members at different angular positions (0°, 90°, 180°, 270°) around the circular body and connecting them in parallel, the system achieves three-dimensional spatial coverage for torque detection, enabling accurate measurement during continuous rotation beyond 360 degrees.
2Device complexity
If sensor members are connected in series, then the structure is simpler, but the sensitivity decreases when installed in a fixation portion
Solution Approach 1:
The patent combines multiple sensor members in a parallel configuration rather than using a single sensor or series connection. This merging of multiple detection elements at different positions around the circular body enhances the overall detection sensitivity and accuracy, particularly when installed in fixation portions, while maintaining manageable structural complexity through standardized parallel connections.
3Device complexity
If a single sensor member is used to detect torque, then the device complexity is reduced, but the accuracy and reliability of torque detection decreases
Solution Approach 1:
Instead of using a single sensor member, the patent segments the detection function across four sensor members positioned at different locations around the circular body. This segmentation allows each sensor to focus on detecting torque in its specific region, and the combined results provide comprehensive and accurate torque measurement, improving reliability through distributed detection.
Solution Approach 2:
The patent changes the detection parameters by using multiple sensor members with different orientations and positions. The first and second sensor members detect torque in one direction, while the third and fourth sensor members detect torque in another direction, creating a multi-parameter detection system that enhances overall accuracy and reliability compared to a single sensor approach.
Data Source
AI summary
A sensor device that detects information related to a load or a torque acting on a detection object includes a plurality of sensor members that are attached to the detection object and are connected in parallel, and an estimation unit that estimates the information related to the load or the torque acting on the detection object based on detected values of the plurality of sensor members.