PCB Coil Connection Structure for High-Temperature Coriolis Sensors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Coriolis flowmeters face challenges in high-temperature applications where the connection between coil devices and contacting elements is prone to detachment due to mechanical forces, leading to unreliable electrical contact.
Innovation Solution
A coil device with a circuit board featuring contacting elements that are securely connected using a metal microparticle mass, where the connection elements are designed to be form-fitting and partially enclosed within indentations on the circuit board, ensuring both mechanical fastening and electrical contact, and are sintered to create a cohesive connection resistant to detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a welding process is used to connect contacting elements to connection elements, then electrical contact is established, but the connection becomes prone to detachment under mechanical forces
Solution Approach 1:
The patent employs a composite connection structure combining a connection element (wire or ribbon) with a contacting element featuring a recess. The connection element is inserted into the recess and secured through deformation or adhesive bonding, creating a composite joint that distributes mechanical stresses and prevents detachment while maintaining electrical conductivity.
2Ease of operation
If the coil device is installed on the measuring device, then the measuring function is enabled, but mechanical forces cause the connection wire to detach from the contacting element
Solution Approach 1:
The contacting element is segmented into a main body with an integrated recess, separating the electrical contact function from the mechanical retention function. The connection element is inserted into this recess, allowing independent optimization of both electrical conductivity and mechanical retention strength to withstand installation and operational forces.
3Reliability
If wire bonding is used to connect the connection, then electrical contact is achieved, but the connection lacks mechanical strength under vibration and shock
Solution Approach 1:
The patent changes the connection method from surface-level wire bonding to insert-type connection within a recess. This geometric parameter change allows the connection element to be deformed or bonded within the confined space, creating mechanical interlocking that provides both electrical contact and vibration/shock resistance simultaneously.
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 provides a reliable and durable electrical connection that withstands mechanical stresses, maintaining contact integrity even under high-temperature conditions, thereby enhancing the stability and accuracy of Coriolis flowmeter measurements.
Implementation Method 1
the indentation being at least partially covered with a solid metal microparticle mass which connects the connection element materially to the circuit board and the contacting element
Implementation Method 2
the coil being set up to detect or generate a time-varying magnetic field
Implementation Method 3
the magnet device and the coil device of a vibration exciter or vibration sensor being set up to interact with one another by means of magnetic fields
Data Source
Figure 1
Figure 2~3
Figure 4~6
AI summary
The invention relates to a measuring sensor of a measuring device for capturing a mass flow rate. The measuring sensor comprises the at least one measuring tube, at least one vibration exciter and at least two vibration sensors, wherein at least one vibration exciter and the vibration sensors each have a coil apparatus having at least one coil in each case and at least one magnetic apparatus in each case, wherein the coil apparatus comprises a printed circuit board having at least one printed circuit board layer, wherein the coil is formed, at least in sections, by means of an electrically conductive conductor track, wherein the coil is arranged on the first side surface and/or second side surface of a printed circuit board layer, wherein the printed circuit board comprises at least two contact-making elements for connecting the coil to an electronic measuring and/or operating circuit of the measuring device by means of connection elements, and is characterized in that at least one contact-making element has a hole.