Multiparametric capillary sensor: stabilization of local heating

To this day, the micro-heating unit in a multiparametric capillary sensor’s setup has been controlled using laboratory power supply with constant voltage. In this method it was assumed that the micro heater’s resistance value is semi-constant. However, due to the fact that degradation effects induced by high power density dissipation in multiple, intense or prolonged heating cycles may cause it to vary, a new approach had to be found. Therefore, in this paper, a development of a power stabilization method using PID controller to compensate for micro-heater’s resistance changes during intense heating is described. Additionally, a current sensing resistor, a programmable power supply and a data acquisition system are incorporated into the setup to provide closed-loop feedback.

[1]  C. Berndt,et al.  Corrosion and oxidation properties of NiCr coatings sprayed in presence of gas shroud system , 2010 .

[2]  M. Korwin-Pawlowski,et al.  Optical Capillary Sensors for Intelligent Classification of Microfluidic Samples , 2010 .

[3]  Toshitaka Idehara,et al.  Gyrotron Output Power Stabilization by PID Feedback Control of Heater Current and Anode Voltage , 2014, 2014 39th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz).

[4]  Jan Szmidt,et al.  Optoelectronic Capillary Sensors in Microfluidic and Point-of-Care Instrumentation , 2010, Sensors.

[5]  Characterization of long pathlength capillary waveguides for evanescent fluorescence sensing applications , 2008 .

[6]  M. Borecki,et al.  Nichrome micro-heaters as actuators for microfluidic sensors , 2016, Symposium on Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments (WILGA).

[7]  Nam-Trung Nguyen,et al.  Micromachined flow sensors—a review , 1997, Flow Measurement and Instrumentation.

[8]  Sung-Hoon Choa,et al.  Development of Micro-Heaters with Optimized Temperature Compensation Design for Gas Sensors , 2011, Sensors.

[9]  L. Marques,et al.  Fabrication and control of a microheater array for Microheater Array Powder Sintering , 2018 .

[10]  Sheng Liu,et al.  A micro channel integrated gas flow sensor for high sensitivity , 2008, 2008 11th Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems.

[11]  D. Flandre,et al.  SOI CMOS compatible low-power microheater optimization for the fabrication of smart gas sensors , 2004, IEEE Sensors Journal.

[12]  Andrzej Kociubiński,et al.  Fiber Optic Capillary Sensor with Smart Optode for Rapid Testing of the Quality of Diesel and Biodiesel Fuel , 2014 .

[13]  A. Neild,et al.  Absorbance and fluorometric sensing with capillary wells microplates. , 2010, The Review of scientific instruments.

[14]  Heather K Hunt,et al.  Label-free biological and chemical sensors. , 2010, Nanoscale.

[15]  F. Auricchio,et al.  Flow-through micro-capillary refractive index sensor based on T/R spectral shift monitoring. , 2017, Biomedical optics express.

[16]  N. Chomnawang,et al.  Design and fabrication of thin-film aluminum microheater and nickel temperature sensor , 2012, 2012 7th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS).

[17]  Otto S. Wolfbeis,et al.  Capillary waveguide sensors , 1996 .