Contactless Inductive Transmitter for CT Scanner Data and Power
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Solution Overview
Problem
Conventional CT devices rely on error-prone slip ring technology or complex and costly optical transmission methods for data transfer between rotating and stationary parts, which are inefficient and prone to issues like sparking and wear, especially due to the high power consumption of x-ray tubes.
Innovation Solution
The implementation of contactless inductive or capacitive power and data transmission using transmitters with combined inductances and coupling capacitances, allowing for efficient bi-directional data transfer and unilateral measurement data transmission without the need for slip rings or optical systems, utilizing screening rings to manage magnetic stray fields and improve transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If slip ring technology is used for data transfer between rotating and stationary parts, then data transmission is achieved, but reliability deteriorates due to sparking and wear
Solution Approach 1:
The patent replaces the mechanical slip ring system with a contactless inductive coupling system. The transmitter coil in the stationary part induces current in the receiver coil in the rotating part, enabling data and power transfer without mechanical contact. This eliminates sparking and wear while maintaining reliable data transmission.
Solution Approach 2:
The patent introduces magnetic field as an intermediary to transfer energy and data between stationary and rotating parts. The transmitter coil generates a magnetic field that couples with the receiver coil, serving as a non-contact intermediary that enables reliable power and data transfer without direct electrical contact.
2Reliability
If optical transmission methods are used for data transfer, then contactless data transfer is achieved, but device complexity and cost increase
Solution Approach 1:
The patent replaces complex optical transmission systems with a simpler inductive coupling system. Instead of using light sources, detectors, and optical fibers, the invention uses electromagnetic induction through coil pairs to achieve contactless data and power transfer, significantly reducing device complexity and cost.
Solution Approach 2:
The inductive coupling system serves multiple functions simultaneously: it transfers both power and data between stationary and rotating parts through the same magnetic field coupling mechanism, eliminating the need for separate optical data transmission systems.
3Power
If high power is transmitted to x-ray tubes, then imaging quality improves, but loss of energy increases due to conventional transmission methods
Solution Approach 1:
The patent replaces conventional contact-based power transmission with contactless inductive coupling, which reduces energy loss through sparking and contact resistance. The magnetic field coupling enables efficient high-power transmission to the x-ray tube while minimizing energy leakage and heat generation in the transmission path.
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
This solution eliminates the drawbacks of conventional methods by providing reliable, high-power contactless energy transfer to the rotating parts of CT devices, reducing wear and complexity, while ensuring accurate and efficient data transmission, thus enhancing the operational stability and reducing costs.
Implementation Method 1
transformer-type transmitters for the contactless transmission of electric power in the sense of a transfer of energy from a stationary part to components of a rotating part
Implementation Method 2
contactless data transmission between the stationary and rotating parts
Data Source
AI summary
A computer tomography device is provided. The computer tomography device includes a rotating part and a stationary part. The rotating part has an X-ray tube for radiographing an object to be examined with X-rays and a detector for detecting the X-rays transmitted through the object. A stationary part has a data processing device for evaluating the detected measuring results, and a transmitter for supplying the X-ray tube and/or the detector and other rotating consumers with supply voltage by contactless transmission of electric power between the stationary and the rotating part. The transmitter is designed for contactless data transmission between the stationary part and the rotating part in addition to the contactless transmission of electrical power.