Flow Rate Detector Circuit Board Protrusion Vibration Support
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional flow rate detectors with protruding circuit board portions are prone to damage from vibrations due to lack of adequate support, leading to potential deformation and reduced durability.
Innovation Solution
A flow rate detector design that includes a substrate assembly with a circuit board having a protrusion supported at both ends by the housing, featuring a supported range that suppresses displacement of the temperature detection element, thereby reducing the risk of damage from vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the circuit board has a protrusion structure to support detection elements, then the detection precision is improved, but the protrusion becomes vulnerable to vibration damage
Solution Approach 1:
The protrusion is divided into multiple segments: a body portion connected to the circuit board, an extended portion protruding outward, and an intermediate portion connecting them. This segmentation allows each part to have optimized functions - the extended portion provides detection precision while the intermediate portion with increased thickness provides vibration resistance.
Solution Approach 2:
The intermediate portion of the protrusion has a thickness that is greater than both the body portion and the extended portion. This local quality enhancement at the critical intermediate section provides targeted reinforcement against vibration damage without affecting the overall detection precision of the extended portion.
2Measurement precision
If the protrusion is made longer to extend further into the fluid flow, then the flow rate detection precision is improved, but the protrusion becomes more susceptible to damage
Solution Approach 1:
The intermediate portion has increased thickness specifically at the location where the protrusion connects to the body portion, creating a localized reinforcement zone. This allows the extended portion to be long enough for precise detection while the intermediate portion provides the necessary strength to prevent damage.
Solution Approach 2:
The intermediate portion is designed with greater thickness in advance before the protrusion is subjected to vibration or stress. This preliminary structural reinforcement prevents damage before it occurs, allowing the extended portion to maintain its length for detection precision without compromising strength.
Data Source
AI summary
A flow rate detector includes: a housing; and a substrate assembly disposed in the housing. The substrate assembly has a flow rate detection element, a temperature detection element, and a circuit board on which the flow rate detection element and the temperature detection element are mounted. The circuit board includes a body portion fixed to the housing, and a protrusion extended to protrude from the body portion. The protrusion has an element fix portion to which the temperature detection element is fixed. The protrusion has a supported portion within a supported range including a position of the element fix portion. The supported range is defined from the element fix portion to a tip end of the protrusion along an extension direction of the protrusion. The supported portion is supported by the housing to suppress a displacement of the element fix portion in a thickness direction of the circuit board.