CAD TARGET/ACTUAL COMPARISON WITH INDUSTRIAL CT
Express measurement of large components
Internal geometries can usually only be measured with difficulty or not at all by optical and tactile devices. In such cases, CT helps with the CAD target/actual comparison.
In order to make the deviations of the CAD model visible even with large components, Microvista uses particularly large & modern computer tomographs. If the job has to be done quickly, an express option can be selected. With this option, the order is prioritised in the process. An online inspection report provides access to the results in the form of 3D false colour images directly after the evaluation. This enables particularly fast initial sample inspections and contract measurements.
CAD target/actual comparison of an aluminium component
Practical example: target/actual comparison of a hand prosthesis
The challenge
Hand prostheses are medical aids that make life easier for people with an amputation. In addition to a natural look, the prosthesis should be precisely adapted to its wearer to enable natural movement patterns. For example, a drive helps to realise grip strength and grasping movement. A thumb drive provides for the execution of other hand positions. With so much attention to detail, it is easy for the prosthesis to go wrong.
Possible consequences
Defective prostheses can cause damage to other parts of the body, such as the shoulder joint. This damage can make it difficult to re-implant the prosthesis or, in the worst case, even make it impossible to use a new prosthesis. Therefore, the (hand) prosthesis should definitely be checked for defects.
Hand prosthesis
Advantages of the CT scan
The target/actual comparison of a hand prosthesis enables a non-destructively produced digital image of the actual state of the medical device. A 3D image of the object is generated by captured data sets and directly shows geometric differences to the target state. For subsequent evaluations and measurements, the hand prosthesis (or another object) is not required again; the stored data records are sufficient to carry out further analyses.
