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Projects / Programmes source: ARIS

Integrated smart measurement system for acquisition and evaluation of sensor’s signals and automatic calibration of the measurement system

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Research activity

Code Science Field Subfield
2.09.03  Engineering sciences and technologies  Electronic components and technologies  Microelectronics 

Code Science Field
T171  Technological sciences  Microelectronics 
Keywords
smart front-end, avtomatic matching control, avtomatic gain control, data acquisition, offset, amplitude, phase
Evaluation (rules)
source: COBISS
Evaluation of bibliographic research performance indicators according to ARIS methodology
Citations Citations for bibliographic records in COBIB.SI that are linked to records in citation databases
source: WoS source: Scopus source: COBISS
Researchers (13)
no. Code Name and surname Research area Role Period No. of publications
1.  01959  PhD Rudolf Babič  Telecommunications  Researcher  2007 - 2010  0 
2.  09034  PhD Tomaž Dogša  Computer science and informatics  Researcher  2007 - 2010  0 
3.  13690  PhD Bojan Jarc  Telecommunications  Researcher  2007 - 2010  0 
4.  27868  PhD Kosta Kovačič  Electronic components and technologies  Researcher  2007 - 2010  0 
5.  06932  PhD Vinko Kunc  Electronic components and technologies  Researcher  2007 - 2010  0 
6.  07486  MSc Andrej Marn  Electronic components and technologies  Researcher  2007 - 2010  0 
7.  16384  PhD Albin Pevec  Electronic components and technologies  Researcher  2007 - 2010  0 
8.  04535  PhD Mitja Solar  Telecommunications  Researcher  2007 - 2010  0 
9.  06682  PhD Slavko Starašinič  Electronic components and technologies  Researcher  2007 - 2010  0 
10.  17880  PhD Matej Šalamon  Telecommunications  Researcher  2007 - 2010  0 
11.  19232  PhD Anton Štern  Electronic components and technologies  Researcher  2007 - 2010  0 
12.  05648  PhD Andrej Vodopivec  Electronic components and technologies  Head  2007 - 2010  0 
13.  07489  PhD Igor Zelinka  Electronic components and technologies  Researcher  2007 - 2010  0 
Organisations (1)
no. Code Research organisation City Registration number No. of publications
1.  0796  University of Maribor, Faculty of Electrical Engineering and Computer Science  Maribor  5089638003  2 
Abstract
The objective of the research work on research project is so called ASSC regulation (Atomatic Sensors’ Signals Conditioning) is automatic amplitude, offset and phase calibration which includes the whole system where the ASSC is implemented. Overall calibration therefore includes the performances of entire signal source and excitation system, performances of integrated sensors and interface to signal source, the non-ideal performances of integrated amplifiers of which parameters changes with process and over environmental conditions. Automatic measurements of relevant parameters and calibration therefore running continuously during normal operation of the over-all measurement system – so called lab-on-a-chip. Research based on algorithms, which can be implemented as integrated applications of the measurement system occupies the magnetic, optical and capacitive sensors and will be constructed as universal signals conditioning mcrosystem. The base of the proposed research is therefore construction of the appropriate algorithms suitable for integration which includes: • automatic amplitudes matching • automatic gain control • automatic channel-phase difference control • automatic channels offset correction All listed functions running automatically without influencing on signal-to-noise ratio reduction while operates on overall system (Figure 1), operation is independent on input signal frequency (from 0 Hz), independent on environmental operating conditions, should be robust designed in selected microelectronics technology and running continuously without separate calibration phase which is a basic scientific and research challenge. Research challenges are also present in the area of measurement parameters to be calibrated or canceled due to wide frequency range of incoming signals while the solutions have to be very low-noise (S/N below 120 dB). Also required instrumentation amplifiers will be designed as low-noise and must be differential-difference type including low-noise regulators. Next, the research part of the project will include new algorithms for automatic parameters measurement and will occupies the following automatically running algorithms for (Figure 2): • amplitude, phase and offset measurement AMM, • matching adjust of selected channels (signals) AMC, • absolute amplitudes adjust AGC, • offset correction AOC and • phase difference correction APC, All features above will be implemented in ASIC integration form in CMOS or BiCMOS technology. System, as it is presented above, does not exist yet. Existing solutions occupies AGC and AOP only and do not operate on DC and AC signals. Proposed system, operates in linear or rotary encoders, means a great improvement of reliability and system accuracy and also means great reduction of production cost of such a measurement systems, useful in almost all segments of modern industry.
Significance for science
The target of this work was to improve the quality of the quadrature signals to enable higher interpolation factors and higher encoder resolution. The present progress already moves the selectivity limits far beyond the state-of-the art, the base of which was solutions on optical encoders heads. Also IDS has very encouraging results using Vernier based pitch modulated optical head (Article in IEEE). The proposed solution for AMM and phase correction PCA is much more robust than that using a square circuit to generate DC voltage out of sine and cosine signals, used by competitors. The amplitude measurement described in this paper is an inherently linear process that generates envelope by using the same signal processing path as the interpolator itself. The interpolator monotonicity is guaranteed by the proposed architecture. These are the main advantages over algorithms and products, used by competitors. Present work is an example showing frequency independent and fast measurement of signal amplitude, phase and offset voltage. All achieved results will further accelerate work towards the more sophisticate and more precise measuring algorithms that will be even faster and suitable for use in sub-nanometer measuring applications. Algorithms that automatically control measured parameters depend on applications and will always be developed regarding applications and overall system requirements. The analog front-end electronics that occupies new algorithms is a basis for IDS future magnetic type decoders. Further work is in progress (PhD and Ms degree students in IDS).
Significance for the country
The aim of this application research and development was to find a cost-effective and area-efficient method of generating peak amplitude information from sine wave signals which was a bases for the AGC function. The major part of the amplitude measurement and envelope extraction is already inherent in the presented flash interpolator and only minor additional electronics has been added. The correction algorithms was analyzed and those suitable for integration (automatic signal conditioning ASC) was implemented in test ASIC EN400B. The results is a speed independent, robust and the world-fastest interpolator ASIC designed in IDS which means growing market for IDS product in incoming years and better products for our domestic client (RLS, for instance, the company which is the IDS leading customer for magnetic type encoders).
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