Smart handheld device with flexible wrist and electrical bioimpedance sensor for tissue inspection

With the evolving demands of surgical intervention, there is a strong need for smaller and functionally augmented instruments to improve surgical outcomes, operational convenience, and diagnostic safety. Owing to the narrow and complicated anatomy, the probe head of the medical instrument is required to possess both good maneuverability and compact size. In addition, the development of medical instrument is moving toward patient-specialized, of which the articulation positions can be customized to reach the target position. To fulfill these requirements, this study presents the design of a smart handheld device which equips with a low cost, easy control, disposable flexible wrist, and an electrical bioimpedance sensor for medical diagnosis. Prototype of the device is made and tested. The experimental results demonstrate that the proposed device can provide accurate manipulation and effective tissue detection, showing a great potential in various medical applications.

Practical Aspects of Roundness Measurements with the use of Coordinate Measuring Machines Equipped with Scanning Probe Heads

One of the most universal measuring techniques in contemporary industry is a coordinate measuring technique. This paper focuses on a problem of measurements of form deviations with the use of coordinate measuring machines (CMMs). Nowadays, such measurements are usually carried out using a scanning probe-heads. The paper discusses the problem of measurements of roundness deviations by a scanning probe-head. Authors conducted an experiment aiming at the study of the influence of the number of probing points and the scanning speed on parameters of roundness error. The results were compared to the reference values obtained from the radius change instrument for highly accurate roundness and cylindricity measurements. The paper presents the introduction to the problem, the methodology of the study, the results of the experiment, discussion and final conclusions including the plan of further research.

Automatisierung in der industriellen Endoskopie/Development of new means regarding sensor positioning and measurement data evaluation – Automation of Industrial Endoscopy

Die speziell zur Inspektion von Kavitäten eingesetzte industrielle Endoskopie ist im Gegensatz zu anderen zerstörungsfreien Prüfverfahren bisher wenig automatisiert. Dies liegt größtenteils an der anspruchsvollen Handhabung der Geräte innerhalb schwer zugänglicher Bereiche sowie der komplexen Auswertung der aufgenommen Messdaten aufgrund hochvarianter Aufnahmebedingungen. In diesem Beitrag wird ein neuartiger Kontinuumsroboter vorgestellt, der die kontaktfreie Führung des Sondenkopfs auf einer Kreisbahn erlaubt und so reproduzierbarere und bessere Sichtbedingungen schafft. Zusätzlich wird ein Konzept zur automatisierten Messdatenauswertung basierend auf Deep Learning vorgestellt.   In contrast to other non-destructive testing methods, industrial endoscopy, which is used specifically for inspecting cavities, has so far been little automated. This is largely due to the demanding handling of the devices within areas that are difficult to access as well as the complex evaluation of the recorded measurement data due to highly variant recording conditions. In this paper, a novel continuum robot is presented that enables non-contact guidance of the probe head on a circular path, creating more reproducible and improved viewing conditions. Additionally, a concept for automated measurement data analysis based on Deep Learning is presented.

Coordinate Measuring Machine Retrofit and Technological Upgradation

Planned To Import Axis Motors and Air Bearing From U.S. •Planned To Import 5axis Probe Head, Probe Head & Machine Controller, 5 Axis Measurement Software From U.K. •Machine Axis X-900mm, Y-1200mm, Z-800mm, A -115°To 115°, B- Infinity Position. •Being Five Axis Technologies We Can Minimize the Measurement Time By 70%, So Throughput Of The Machine Can Be Increased. •Being Five Axis Technologies We Can Rotate The Probe Head With Infinite Positions Which Can Minimize The Stylus Calibration & Increases Machine Accuracy. •CMM Retrofit, Technological Upgradation & Calibration Cost Will Come Around 80 Lakhs.

Pulse Oximeter for Low SpO2 Level Detection Using Discrete Time Signal Processing Algorithm

Oximeter is an important clinical device used for measuring peripheral capillary oxygen saturation (SpO2) in blood and hence accurate results are needed in order to help physicians predict clinical problems in the initial stage(s) of liver or kidney diagnosis. Different issues associated with the accuracy of SpO2 and heart rate measurement accuracy are studied in this work. With the understanding of these issues, a new SpO2 monitoring system is proposed that comprises of a better detection method, novel discrete time signal processing (DTSP) algorithm, and a custom-made oximeter probe head. The proposed SpO2 measurement system is capable of determining low levels of SpO2 present in human blood and produce the results in a short time that enable real-time monitoring of a patient SpO2. It can also distinguish low level of SpO2 against background noise.

Magic angle spinning spheres

Magic angle spinning (MAS) is commonly used in nuclear magnetic resonance of solids to improve spectral resolution. Rather than using cylindrical rotors for MAS, we demonstrate that spherical rotors can be spun stably at the magic angle. Spherical rotors conserve valuable space in the probe head and simplify sample exchange and microwave coupling for dynamic nuclear polarization. In this current implementation of spherical rotors, a single gas stream provides bearing gas to reduce friction, drive propulsion to generate and maintain angular momentum, and variable temperature control for thermostating. Grooves are machined directly into zirconia spheres, thereby converting the rotor body into a robust turbine with high torque. We demonstrate that 9.5–mm–outside diameter spherical rotors can be spun at frequencies up to 4.6 kHz with N2(g) and 10.6 kHz with He(g). Angular stability of the spinning axis is demonstrated by observation of 79Br rotational echoes out to 10 ms from KBr packed within spherical rotors. Spinning frequency stability of ±1 Hz is achieved with resistive heating feedback control. A sample size of 36 μl can be accommodated in 9.5-mm-diameter spheres with a cylindrical hole machined along the spinning axis. We further show that spheres can be more extensively hollowed out to accommodate 161 μl of the sample, which provides superior signal-to-noise ratio compared to traditional 3.2-mm-diameter cylindrical rotors.