Cylinder Block Signal Verification in Hydraulic Systems
Solution Overview
Problem
The challenge lies in determining whether a cylinder block used in hydraulic devices is a suitable or unsuitable product, as using an unsuitable product can lead to functional failures.
Innovation Solution
A hydraulic system with a cylinder block featuring specific detected portions and sensors that output distinct signals based on the rotation of the block, allowing a determination device to identify suitable products through signal analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a cylinder block is replaced without verification, then the replacement process is simple and fast, but the device may fail to achieve desired function due to using unsuitable products
Solution Approach 1:
The system performs preliminary verification of the cylinder block's suitability before the hydraulic device operates with it. The determination device checks whether the cylinder block is a suitable product by analyzing signals from detected portions on the outer peripheral surface, ensuring functional reliability before use.
Solution Approach 2:
The system provides feedback about the cylinder block's suitability to the operator. The determination device outputs determination results that indicate whether the installed cylinder block is appropriate, allowing the operator to verify the replacement quality and take corrective action if necessary.
2Reliability
If verification of cylinder block suitability is implemented, then functional reliability is improved, but the device complexity increases due to additional sensors and determination mechanisms
Solution Approach 1:
The sensor serves multiple functions: it detects the rotation of the cylinder block, identifies the detected portions on the outer peripheral surface, and provides data for determining suitability. This multi-functionality reduces the need for separate verification components, thereby limiting the increase in device complexity.
3Measurement precision
If multiple detected portions are arranged on the cylinder block, then measurement precision for suitability determination is improved, but manufacturing precision requirements increase
Solution Approach 1:
The verification is divided into multiple detection points around the cylinder block's outer peripheral surface. By arranging multiple detected portions at different angular positions and analyzing their signals sequentially during rotation, the system achieves high measurement precision for suitability determination without requiring extremely tight manufacturing tolerances for each individual detected portion.
Data Source
AI summary
A hydraulic system includes a hydraulic device and a determination device. The hydraulic device includes a casing, a cylinder block including first detected portions and one or more second detected portions on the outer peripheral surface of a cylinder block body, a piston, a linkage mechanism, and a sensor that is provided at a position corresponding to each of the detected portions. When the detected portion passes by during rotation of the cylinder block, the sensor outputs one of first and second signals. The determination device determines, based on an output from the sensor, whether the cylinder block is a suitable product. The first detected portions are circumferentially spaced apart at a predetermined first distance on the outer peripheral surface. The second detected portion(s) are circumferentially spaced apart from the adjacent first detected portion at a second distance different from the first distance on the outer peripheral surface.