Pilot Valve Bar Code Correction for Hydraulic Operation Devices
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Solution Overview
Problem
Conventional operation devices for hydraulic systems require electronic circuits on pilot valves, leading to high costs and limited installation options, along with the need for complex wiring between sensors and circuits, which complicates the correction of non-uniformities due to manufacturing errors.
Innovation Solution
An operation device with a pilot valve featuring first and second bar codes containing actual measurement information, allowing a bar code reader to modify operating signals and correct non-uniformities without the need for electronic circuits on the pilot valve, utilizing an operating unit, pilot valve, and operating amount detection sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electronic circuits are installed on the pilot valve to correct non-uniformity in characteristics, then the correction capability is improved, but the device complexity and cost increase
Solution Approach 1:
The patent uses bar codes (optical copies) to store correction data instead of electronic circuits. The bar codes contain correction information that can be read and applied to compensate for manufacturing non-uniformities, providing a simple, cost-effective alternative to complex electronic systems while maintaining the correction capability
Solution Approach 2:
The patent replaces the electronic circuit system with a mechanical/optical system using bar codes and bar code readers. This substitution eliminates the need for complex electronic components on the pilot valve while still enabling correction of manufacturing non-uniformities through optical reading and data processing
2Manufacturing precision
If electronic circuits are installed on the pilot valve, then the correction capability is improved, but the installation position options are limited and wiring is required
Solution Approach 1:
The correction data is copied into bar codes that can be placed on the pilot valve body without requiring electronic circuit installation. This allows flexible placement at various positions on the valve while eliminating wiring requirements, as the bar codes are passive optical elements that can be read wirelessly
Solution Approach 2:
The patent extracts the correction data from electronic circuit form and stores it in bar code format on the pilot valve. This separation allows the correction information to be independently accessible without requiring integration of electronic circuits, providing installation flexibility and eliminating wiring needs
3Device complexity
If bar codes are provided on the pilot valve for correction, then the device complexity is reduced, but reading errors may occur if the bar codes are unclear
Solution Approach 1:
The patent incorporates reading error prevention information into the bar codes before they are applied to the pilot valve. This preventive measure ensures that even if the bar codes become unclear or damaged during use, the embedded error prevention data allows for successful reading and correction, maintaining system reliability
Data Source
AI summary
An operation device includes: an operating unit; a pilot valve that outputs a pilot pressure corresponding to an operating amount of the operating unit; an operating amount detection sensor that outputs an operating amount signal corresponding to the operating amount of the operating unit; a first bar code provided on the pilot valve and containing pilot pressure actual measurement information indicating a relationship between the operating amount of the operating unit and an actual measurement value of the pilot pressure outputted from the pilot valve; and a second bar code provided on the pilot valve and containing operating amount signal actual measurement information indicating a relationship between the operating amount of the operating unit and an actual measurement value of the operating amount signal outputted from the operating amount detection sensor.