Abstract
This paper presents a sensor system with temperature control of platinum microheater using a combined control strategy of open-loop and closed-loop control. The method proposed in this paper modifies the proportional integral control for faster response under sampling time constraint of large sampling interval, as a large sampling interval between two control commands slow the response. The initial quick temperature rising open-loop response of microheater contributes to faster rise time, and then, it is switched to closed-loop control when the quick initial rise has taken place, hence termed open-loop to closed-loop switched proportional integral (OLCLS PI) control. The settling time obtained by OLCLS PI and PI are 3 and 14 s, respectively, for 2% accuracy, thereby providing faster response than PI. The work is studied with elaborate modeling and simulation using MATLAB, and a practical implementation on embedded platform is presented using an in-house developed MOX-based gas sensor, which utilizes a platinum microheater.
Original language | English |
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Article number | 8447201 |
Pages (from-to) | 8549-8557 |
Number of pages | 9 |
Journal | IEEE Sensors Journal |
Volume | 18 |
Issue number | 20 |
DOIs | |
Publication status | Published - 15 Oct 2018 |
MoE publication type | A1 Journal article-refereed |
Funding
Manuscript received July 9, 2018; revised August 12, 2018; accepted August 12, 2018. Date of publication August 27, 2018; date of current version September 25, 2018. The research of this article is financially supported by the Council of Scientific and Industrial Research (CSIR), under MLP-104 FTT Project. The associate editor coordinating the review of this paper and approving it for publication was Dr. Cheng-Ta Chiang. (Corresponding author: Samarth Singh.) The authors are with the Department of Cyber Physical System, ISL-105, CSIR-Central Electronic Engineering Research Institute, Pilani, Rajasthan 333031, India (e-mail: [email protected]; [email protected]; [email protected]; [email protected]; [email protected]). Digital Object Identifier 10.1109/JSEN.2018.2867233
Keywords
- Fast settling
- integrated gas sensor
- open loop to closed loop switched proportional integral (OLCLS PI) control
- platinum microheater
- proportional integral temperature controller
- settling time