Actuator Sensor Unit Selection for Hydraulic Piston Position Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hydraulic pressure control circuits for vehicles face challenges in achieving accurate piston position detection due to variations in machining accuracy and sensor unit placement, leading to insufficient detection accuracy and complex manufacturing processes.
Innovation Solution
A method for setting an actuator with a stroke sensor that involves acquiring detection values from multiple sensor units and selecting the most accurate unit based on actual piston movement characteristics, allowing for precise control without strict sensor placement, thereby improving detection accuracy and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensor units are used to improve detection accuracy, then detection accuracy may be improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-setting the attachment positions of multiple sensor units on the sensor housing before assembly. The sensor units are arranged at specific predetermined positions (first, second, and third attachment positions) that are determined in advance during manufacturing, eliminating the need for complex post-assembly adjustments and simplifying the overall device complexity while maintaining detection accuracy
Solution Approach 2:
The patent changes the parameter of sensor unit arrangement from requiring strict precise positioning to using predetermined attachment positions with defined spatial relationships. By specifying that sensor units be arranged at particular positions relative to each other (with the second position being opposite the first, and the third at a different height), the system achieves accurate detection without requiring extremely tight manufacturing tolerances
2Measurement precision
If attachment position of sensor unit is strictly set to obtain sufficient detection accuracy, then detection accuracy is improved, but manufacturing process becomes complicated
Solution Approach 1:
The sensor housing is designed with predetermined attachment positions that are established during the housing manufacturing process itself. This preliminary action allows sensor units to be mounted at correct positions without requiring complex post-assembly adjustment procedures, thereby improving ease of manufacture while ensuring detection accuracy
Solution Approach 2:
The sensor system is segmented into multiple independent sensor units that can be manufactured and tested separately, then mounted at predetermined positions on the sensor housing. This segmentation allows each sensor unit to be optimized independently and simplifies the manufacturing process by enabling modular assembly rather than requiring the entire sensor assembly to be manufactured as a single complex unit
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
This approach ensures accurate piston position detection and control by selecting the most reliable sensor unit for each position, enhancing the overall performance of the hydraulic pressure control circuit while reducing manufacturing complexity.
Implementation Method 1
a stroke sensor that detects a position of a piston by a magnet as a member to be detected being attached to the piston to be moved integrally with the piston and detecting a change in a magnetic force of the magnet using a sensor unit
Data Source
AI summary
A method of setting an actuator capable of accurately detecting a position of a piston using a plurality of sensor units is provided. The method includes a detection value acquisition step of moving a piston in a direction of an axis inside a cylinder and acquiring a detection value from each of a first sensor unit and a second sensor unit for each position of the piston, and a controlling sensor unit-setting step of setting a controlling sensor unit that is used for control of a two-way piston from among the first sensor unit and the second sensor unit on the basis of the detection values obtained for the first sensor unit and the second sensor unit.