Field Device Amplifier Shield Chamber Size Reduction
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Solution Overview
Problem
The existing vortex flowmeters face limitations in design flexibility due to the increased size of the amplifier shield chamber required for screwing signal lines to substrates, which also compromises maintainability and noise shielding efficiency.
Innovation Solution
The field device incorporates a connector-connection system for the sensor lead wire inside the converter, allowing the amplifier shield chamber to be reduced in size, enabling detachable and directionally adjustable converters without internal access, and utilizing an amplifier shielding plate to maintain noise shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a signal line is screwed to a substrate disposed in an amplifier shield chamber, then the signal line connection is secure, but the amplifier shield chamber size increases and design freedom is limited
Solution Approach 1:
The patent divides the amplifier shield chamber into multiple levels or zones, allowing signal lines to be connected at different positions without requiring the entire chamber to be enlarged. This segmentation enables efficient space utilization while maintaining connection reliability.
Solution Approach 2:
The patent utilizes the vertical dimension within the amplifier shield chamber by providing a support structure that extends in the height direction. Signal lines can be connected at different heights, effectively using three-dimensional space rather than only horizontal plane, thereby avoiding chamber enlargement.
2Ease of operation
If the amplifier shield chamber size is increased to accommodate screw connections, then signal line installation is easier, but maintainability deteriorates and noise shielding efficiency is compromised
Solution Approach 1:
The patent incorporates a support structure with predetermined connection positions during the manufacturing stage. This preliminary preparation allows signal lines to be easily connected without requiring complex installation procedures or internal access, thereby maintaining ease of operation while preserving chamber size for effective noise shielding.
3Ease of operation
If the amplifier shield chamber size is increased, then signal line connection space is sufficient, but noise shielding efficiency decreases
Solution Approach 1:
The patent nests the signal line connection structure within the existing amplifier shield chamber volume by utilizing vertical space through the support structure. This nested arrangement provides adequate connection space without expanding the external chamber dimensions, thereby maintaining noise shielding efficiency.
Data Source
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AI summary
A field device includes: a casing portion that has an amplifier shield chamber into which an analog signal transfer portion transferring an analog signal output from a detector is able to be inserted; a signal conversion portion that is disposed inside the amplifier shield chamber, the signal conversion portion being configured to convert the analog signal into a digital signal; and a first connector that is disposed inside the amplifier shield chamber, the first connector being configured to connect the analog signal transfer portion and the signal conversion portion to each other in an attachable/detachable manner.