Milos Drutarovsky, Ondrej Benedik, Miroslav Sokol, Pavol Galajda, Jan Saliga, Jan Ligus, Cristian D Stratyinski
We describe custom architecture of a small synthesizable soft processor for the next generation of proprietary capacitive angle sensor (CAPSE) developed by CTRL company for space applications. We process data streams from ADCs by custom developed 16-bit processor. The processor is written in platform independent VHDL code. It uses a small Leros (soft processor) control unit and several custom coprocessors including CORDIC, fixed-point fractional multiplier, and adder with barrel shifter optimized for fractional fixed-point arithmetic. We describe architecture of the proposed processor and...
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.25
· Download
Luiz G. Enger, Aleš Travnik, Peter Leitner, Florian Slanovc, Daniel Markó, Michael Ortner
Magnetic position and orientation systems offer the advantages of contactless sensing, high precision, robustness and low cost. They are heavily employed in automotive and industrial applications. The standard development process of such system starts with a simulation that is followed by validation with experimental data. This work presents a platform to which different sensors and magnets can be attached, with complete six degrees of freedom for relative movement. It is thus quite flexible in terms of experiments it can perform. A system calibration scheme based on dipole approximation is...
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.24
· Download
Noby George, Pavel Ripka, Václav Grim
A detailed analysis of the crosstalk in the gapped-core current sensor is presented in this paper. The gapped-core current transducer with a magnetic field sensor in the airgap is widely used to measure current in industries and laboratories. We examine the effect of a nearby current-carrying conductor on the performance of the gapped-core transducer, for the first time in this paper. The crosstalk is studied by considering various factors such as angular and linear displacement of the external conductor, core material, and position of the main conductor. A 3D Finite Element Method (FEM)...
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.23
· Download
Michael Ortner, Alexandre Boisselet, Luiz G. Enger, Florian Slanovc, Peter Leitner, Daniel Markó
In this work, we promote the use of analytical solutions for magnetic position system design and analysis, which has become extremely convenient through the development of the open-source Magpylib computational package. We discard three common arguments against this ansatz by showing that analytical models are suitable for dealing with complex shapes, inhomogeneous magnetizations and even material interactions. Accuracy of analytical models is discussed, and the computational performance is demonstrated with three examples, a complex shape, an inhomogeneous magnet, and the calibration of a...
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.22
· Download
Bruno Trinchera, Paolo Durandetto, Danilo Serazio
The new quantum SI opens the route to link the base unit definitions to fundamental constants of nature. In the spirit of the quantum SI, a similar traceability route can be implemented for alternating electrical quantities, such as electrical power. Its implementation is summarized in the present paper along with the main steps about the realization of a quantum-based sampling power standard carried out in the framework of the EMPIR project Quantum Power. A programmable Josephson voltage standard (PJVS) based on a 1-V SNS binary array provides the traceability of the power standard. The...
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.21
· Download
Jan Sobotka, Jirí Novák, Jirí Pinkava
A modern car is made up of a considerable amount of software running on many Electronic Control Units interconnected by communication infrastructure. Together it creates a rigid system, which is not easy to modify for running modified or custom code to implement new vehicle functions or gathering scientific data. The paper presents a modified (electric) vehicle architecture allowing rapid prototyping. The architecture enables control of particular vehicle functions by an independent computer, arbitrary vehicle data acquisition, and offers an interface for communication with the driver....
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.20
· Download
Sebastian Rivera, Rolf Slatter
Modern drive systems rely in terms of accuracy and robustness on the quality of the used position sensors. For high accuracy applications optical position sensors are dominating the market with a trend towards more magnetic systems as their robustness in the field is superior compared to the optical counterparts. While the sensor itself has a great impact on system accuracy, the used scale or pole wheel is of similar importance when evaluating system architectures. ITK presents in this paper a machine setup for high accuracy, single pole writing machines either for linear or rotary magnetic...
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.19
· Download
Jürgen Gerber, Rolf Slatter
When it comes to scales for magnetic length and angle measurement systems, there has been no uniform terminology, no common drawing rules - neither for the mechanical nor for the magnetic parameters - and this has often led to misunderstandings or even errors in de-sign drawings. This primarily affects manufacturers of magnets, magnetic scales and sen-sors as well as machine or device manufacturers. A consortium consisting of a total of 13 companies and research institutions, mainly members of the Innovation Platform for Mag-netic Microsystems INNOMAG e. V., has now developed a DIN SPEC...
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.18
· Download
Erxat Arkin, Jiqing Fu, Qing He, Jia Kong
Calibration of atomic density in vapour cell is very important for high precision quantum metrology and fundamental research. Here we propose to use spin noise spectroscopy(SNS) method for density estimation which would be more reliable than the common density estimation methods based on absorption spectrum or thermodynamic equation. We show our test with different density estimation methods, and show the robustness of SNS method.
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.17
· Download
Dragana Popovic Renella, Thomas Kaltenbacher, Sasa Spasic, Andrea Cavelti, Giorgio Valsecchi, Lennart Nachtigall, Marco Hutter
This paper describes a novel CMOS magnetic field sensor that can measure all three magnetic field components (Bx, By, and Bz) simultaneously at a single location. The sensor employs three groups of mutually orthogonal horizontal and vertical Hall-effect elements, each with dedicated biasing circuits and amplifiers. The field sensitive volume of the 3D sensor is very compact, only 100 x 100 μm2, which enables high spatial resolution. The use of CMOS technology ensures high angular accuracy and orthogonality of the three measurement axes. The sensor also employs a spinningcurrent technique...
TC4 Symposium 2023
· TC4
· 2023
· 10.21014/tc4-2023.16
· Download