Rotation Sensor with Main and Sub Detection Elements for Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional rotation detection devices for motors are complex in configuration due to the need for multiple sensor units with different configurations, which complicates their design and operation.
Innovation Solution
A detection device comprising a sensor with a main detection element, sub detection elements, and a signal processing section that outputs digital and analog signals to a control unit, simplifying the configuration by using the main detection element for control and sub detection elements for abnormality detection, and reducing the size and error of the rotation angle sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple sensor units with different configurations are used for rotation detection, then detection reliability is improved, but device complexity increases
Solution Approach 1:
The sensor is divided into a main detection element and multiple sub detection elements. The main detection element provides primary detection data while sub detection elements provide backup and redundancy, achieving reliable detection without requiring multiple complete sensor units.
Solution Approach 2:
The main detection element serves dual purposes: it provides primary detection data for normal operation and can be cross-validated by sub detection elements for abnormality detection, reducing the need for completely separate sensor units.
2Reliability
If multiple sensor units are used for rotation detection, then detection reliability is improved, but manufacturing cost increases
Solution Approach 1:
Multiple detection elements (main and sub elements) are integrated into a single sensor unit with shared signal processing circuitry. This merging approach achieves the reliability of multiple sensors while reducing manufacturing costs by eliminating redundant components.
Solution Approach 2:
The signal processing section handles data from both main and sub detection elements, enabling one sensor unit to perform the work of multiple traditional sensor units, thereby reducing overall manufacturing cost while maintaining reliability.
3Device complexity
If a single detection element is used, then device complexity is reduced, but reliability decreases due to lack of redundancy
Solution Approach 1:
Sub detection elements are built in as redundant backup components that remain standby ready to take over if the main detection element fails, providing beforehand cushioning against detection failures and ensuring operational continuity.
Solution Approach 2:
Different detection elements have specialized roles: the main detection element is optimized for primary detection while sub detection elements are optimized for backup and abnormality detection, allowing each component to be simpler while collectively providing robust reliability.
Data Source
AI summary
A detection device includes a sensor and a control unit. The sensor includes at least one main detection element configured to detect a change in a physical quantity of a detection target, at least one sub detection element configured to detect a change in a physical quantity of the detection target, and a signal processing section configured to process a detection signal of the main detection element. The control unit acquires a signal from the sensor according to a change in the physical quantity of the detection target. The sensor outputs to the control unit a digital signal containing information corresponds to a detection value of the main detection element and an analog signal that corresponds to a detection value of the sub detection element.