Rotating Machine Sensor Assembly for Stable Speed and Direction Detection
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Solution Overview
Problem
Existing sensor devices for high-speed rotating machines are complex and costly to manufacture, with difficulty in achieving stable rotational speed detection and accommodating varying spacings between the rotating body and sensors.
Innovation Solution
A sensor device comprising a rotating body with a magnetic permeable ring and positioning structures, combined with four radial displacement sensors and two rotational speed sensors, which generate pulse waves through a differential circuit to calculate rotational speed and maintain stability, while allowing for flexible spacing arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional sensor configurations are used for high-speed rotating machines, then rotational speed detection can be achieved, but the device complexity and manufacturing cost increase significantly
Solution Approach 1:
The patent combines multiple sensing functions (rotational speed detection and radial displacement detection) into a single integrated sensor device. The sensor device includes both a rotational speed sensor with positioning structures and radial displacement sensors, eliminating the need for separate sensor systems and reducing overall device complexity while maintaining detection stability
Solution Approach 2:
The sensor device is designed to perform multiple functions simultaneously: it detects rotational speed through the rotational speed sensor and positioning structures, while also measuring radial displacement through the radial displacement sensors. This multi-functional design reduces the number of separate components needed and simplifies the overall system configuration
2Measurement precision
If traditional sensor configurations are used for high-speed rotating machines, then rotational speed detection can be achieved, but manufacturing cost and time increase
Solution Approach 1:
The sensor device integrates multiple sensing functions into a single manufacturable unit. The positioning structures are formed as integral parts of the sensor housing through molding or machining operations, and all sensors are mounted in a single assembly process, significantly reducing manufacturing time compared to traditional separate sensor installations
3Device complexity
If fixed sensor spacing is used, then circuit design can be simplified, but adaptability to different applications with varying spacing requirements is reduced
Solution Approach 1:
The sensor device incorporates adjustable positioning structures that allow the spacing between sensors and the rotating body to be dynamically adjusted based on application requirements. The radial displacement sensors can be positioned at different radial distances, and the rotational speed sensor positioning structures can be adjusted axially, enabling the device to adapt to various spacing conditions while maintaining stable detection through differential circuit design
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 solution provides stable rotational speed detection, reduces circuit complexity, and allows for flexible mounting configurations, enhancing the applicability of the sensor device in high-speed rotating machines.
Implementation Method 1
output signals of the two rotational speed sensors are used to generate pulse waves through a differential circuit, and the rotational speed and turning direction of the rotating body can be calculated by measuring the frequency of the pulse waves
Implementation Method 2
each of the four radial displacement sensors is separated from the magnetic permeable ring by a radial air-gap spacing
Data Source
AI summary
A sensor device for high speed rotating machine includes a rotating body and a sensor assembly. The rotating body includes a magnetic permeable ring and at least one positioning structure. The magnetic permeable ring includes a radial displacement sensing area and a rotational speed sensing area, and the positioning feature is arranged in the rotational speed sensing area. The sensor assembly includes four radial displacement sensors and two rotational speed sensors. The radial displacement sensor is a double-probe type sensor, and the speed sensor is a double-probe or four-probe type sensor. Through different types of the rotational speed sensors and the radial displacement sensors, the rotation speed and turning direction of the rotating body can be calculated.