Transducer Cable Assembly Strain Relief Design
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Solution Overview
Problem
Conventional transducer cable assemblies in ultrasonic flow meters are prone to damage during shipping and installation, and protective coverings that prevent damage often result in bulky or difficult-to-install designs, increasing costs and manufacturing complexity.
Innovation Solution
A compact transducer termination assembly featuring a cylindrical plug body with a lock-engaging channel, a pliable fixing member, and a tubular retainer with a locking mechanism, which provides strain relief and secure coupling to the meter body, allowing for easy installation and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If robust and expensive protective cables are employed to resist damage during shipping and installation, then reliability is improved, but device complexity and cost increase
Solution Approach 1:
The cable is nested within a protective conduit that integrates with the transducer assembly housing. The conduit contains the cable along its entire length, protecting it from damage while maintaining a compact overall structure that doesn't significantly increase device complexity
Solution Approach 2:
The protective conduit is merged with the transducer assembly housing structure, combining the cable protection function with the existing structural components. This integration eliminates the need for separate protective cable coverings and reduces overall assembly complexity
2Reliability
If protective coverings or shrouds are employed for transducer cables, then reliability is improved, but the space available for cable assemblies is reduced and device complexity increases
Solution Approach 1:
The cable is nested within a protective conduit that follows the contour of the transducer assembly, efficiently utilizing the available space without requiring additional external volume. The conduit is positioned within the existing structural envelope of the assembly
Solution Approach 2:
The protective conduit is routed along the longitudinal axis of the transducer assembly, utilizing the length dimension rather than adding radial or lateral volume. This dimensional approach to cable routing protects the cable while maintaining a compact cross-sectional profile
3Reliability
If protective coverings or shrouds are employed for transducer cables, then reliability is improved, but ease of installation and service is worsened
Solution Approach 1:
The cable is pre-installed within the protective conduit during conduit fabrication, and the conduit is pre-attached to the transducer assembly before final installation. This preliminary preparation eliminates the need for separate cable routing and protection steps during installation
Solution Approach 2:
The cable protection function is merged with the transducer assembly housing structure, so that protecting the cable is an inherent part of the assembly design rather than an additional step. This integration simplifies installation by eliminating separate protective covering steps
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
The solution enhances protection and ease of installation while reducing manufacturing and assembly costs by providing a compact, robust, and efficient cable assembly that minimizes damage and simplifies the assembly process.
Implementation Method 1
two or more transducers employing the piezoelectric effect, each secured inside of a dedicated port in the body of the flow meter
Implementation Method 2
The transducers transmit and receive electric signals back-and-forth across the fluid stream
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A cable assembly for coupling a transducer includes a plug body having a nose section with a nose end, a tail section with a tail end opposite the nose end; and a cable restraining feature disposed proximal the tail end. In addition, the cable assembly includes a cable having a first end, a second end, a signal conductor, and a pliable fixing member. A portion of the pliable fixing member is disposed in the cable restraining feature and extends at least partially around the plug body to limit the movement of the first end of the cable relative to the plug body.