scholarly journals Proof-of-Concept Simulasi Kadar Saturasi Oksigen untuk Evaluasi Pulse Oximeter

2018 ◽  
Vol 6 (1) ◽  
pp. 110
Author(s):  
FUAD UGHI
Keyword(s):  
Oxygen Saturation ◽  
Pulse Oximeter ◽  
Light Emitting Diode ◽  
System Level ◽  
Proof Of Concept ◽  
Led Driver ◽  
Digital To Analog Converter ◽  
Light Emitting ◽  
Analog Converter ◽  
Digital To Analog

ABSTRAKSimulator SpO2 yang mengemulasikan sinyal yang ekuivalen dengan saturasi oksigen pada manusia, dapat digunakan untuk evaluasi repeatibility pulse oximeter. Simulator ini tersedia di pasaran dengan harga yang cukup mahal di Indonesia, di kisaran 80-100 juta rupiah. Studi ini bertujuan untuk mengembangkan simulator SpO2 dengan biaya rendah, menggunakan komponen elektronika umum yang ada di pasaran. Karakteristik simulasi mengacu kepada referensi yang diambil dari simulator komersial dengan menggunakan sistem akuisisi data berbasis LabVIEW. Kadar saturasi oksigen disimulasikan dengan mengatur intensitas cahaya light emitting diode (LED), untuk meniru penyerapan cahaya oleh darah pada pembuluh arteri. Digital to analog converter digunakan sebagai LED driver, untuk mengatur besar tegangan ke LED yang berbanding lurus dengan intensitas cahaya. Sebagai pembuktian konsep, studi ini berhasil menyimulasikan kadar saturasi oksigen 80% dengan galat mencapai 11.25%, dan 80 denyut jantung per menit dengan galat 6.25%. Hasil simulasi belum bisa dibandingkan dengan simulator komersial, karena hasil yang belum stabil. Total biaya untuk komponen perangkat keras, mencapai satu juta rupiah.Kata kunci: simulator, saturasi oksigen, pulse oximeter, digital to analog converter, light emitting diode ABSTRACTSpO2 simulator, which emulates signal that equivalent to oxygen saturation level of human, can be used to evaluate repeatibility of pulse oximeter. SpO2 simulators are available in Indonesia, but the price is quite expensive, in range of 80-100 million rupiah. The study aims to develop low-cost SpO2 simulator, using common electronic components. Characteristic of simulation refer to reference data, which taken from commercial simulator using LabVIEW based data acquisition system. Level of oxygen saturation is simulated by adjusting beam intensity of light emitting diode (LED), to imitate light absorbance by arterial blood. Digital to analog converter is used as LED driver, to control voltage to LED that directly proportional to light intensity. As a proof of concept, SpO2 simulation has been successfully performed at level 80% with error reaches 11.25% deviation, and heart rate 80 beat per minute with error reaches 6.25%. The simulation result had not compared yet to a commercial simulator, due to the unstable result. Total cost for hardware components of the prototype is around one million rupiah.Keywords: simulator, oxygen saturation, pulse oximeter, digital to analog converter, light emitting diode

Increasing the information capacity of a fiber-optic multi-sensor converter of binary mechanical signals into electrical signals

2020 ◽  
pp. 15-23
Author(s):  
V. M. Grechishnikov ◽  
E. G. Komarov
Keyword(s):  
Fiber Optic ◽  
Information Capacity ◽  
Parallel Structure ◽  
Optical Scheme ◽  
Digital To Analog Converter ◽  
Electrical Signals ◽  
Mechanical Signals ◽  
Analog Converter ◽  
Output Code ◽  
Digital To Analog

The design and operation principle of a multi-sensor Converter of binary mechanical signals into electrical signals based on a partitioned fiber-optic digital-to-analog Converter with a parallel structure is considered. The digital-to-analog Converter is made from a set of simple and technological (three to five digit) fiber-optic digital-to-analog sections. The advantages of the optical scheme of the proposed. Converter in terms of metrological and energy characteristics in comparison with single multi-bit converters are justified. It is shown that by increasing the number of digital-analog sections, it is possible to repeatedly increase the information capacity of a multi-sensor Converter without tightening the requirements for its manufacturing technology and element base. A mathematical model of the proposed Converter is developed that reflects the features of its operation in the mode of sequential time conversion of the input code vectors of individual fiber-optic sections into electrical analogues and the formation of the resulting output code vector.

VIS-NIR LED Illumination in Backside Circuit Edit and Optical Probing Applications

2012 ◽  
Author(s):  
Shida Tan ◽  
Richard H. Livengood ◽  
Dane Scott ◽  
Roy Hallstein ◽  
Pat Pardy ◽  
...  
Keyword(s):  
High Resolution ◽  
Image Quality ◽  
Optical Imaging ◽  
Narrow Band ◽  
Light Emitting Diode ◽  
Air Gap ◽  
Optical Image ◽  
Proof Of Concept ◽  
Light Emitting ◽  
Optical Probing

Abstract High resolution optical imaging is critical in assisting backside circuit edit (CE) and optical probing navigation. In this paper, we demonstrated improved optical image quality using VIS-NIR narrow band light emitting diode (LED) illumination in various FIB and optical probing platforms. The proof of concept was demonstrated with both common non-contact air gap lenses and solid immersion lenses (SIL).

scholarly journals Coded Control of a Sectional Electroelastic Engine for Nanomechatronics Systems

2021 ◽  
Vol 4 (3) ◽  
pp. 47
Author(s):  
Sergey M. Afonin
Keyword(s):  
Transfer Function ◽  
Mechanical Load ◽  
Inertial Load ◽  
Digital To Analog Converter ◽  
Transient Characteristics ◽  
Analog Converter ◽  
Digital To Analog

This work determines the coded control of a sectional electroelastic engine at the elastic–inertial load for nanomechatronics systems. The expressions of the mechanical and adjustment characteristics of a sectional electroelastic engine are obtained using the equations of the electroelasticity and the mechanical load. A sectional electroelastic engine is applied for coded control of nanodisplacement as a digital-to-analog converter. The transfer function and the transient characteristics of a sectional electroelastic engine at elastic–inertial load are received for nanomechatronics systems.

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