Measuring Device for Controlling a Vaporising Liquid Microthruster
C.A. Straathof (TU Delft - Electrical Engineering, Mathematics and Computer Science)
R.R. van Wijk (TU Delft - Electrical Engineering, Mathematics and Computer Science)
HW van Zeijl – Mentor (TU Delft - Electronic Components, Technology and Materials)
B. El el Mansouri – Graduation committee member (TU Delft - Electronic Components, Technology and Materials)
A.J.M. Montagne – Coach (TU Delft - Electronics)
Nuria Llombart – Coach (TU Delft - Tera-Hertz Sensing)
Pascal Aubry – Coach (TU Delft - Microwave Sensing, Signals & Systems)
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Abstract
The objective of the project is to design a system which can control the temperature of a va-porizing liquid microthruster (VLM). The liquid in a VLM is heated using a heater resistor.This resistor will be used to both heat the liquid and measure the temperature.In this thesis the subsystem responsible for the measurements and the conversion of the mea-sured signals to the digital domain will be discussed. We propose a method where short measure-ment current pulses of a fixed amplitude are applied to the heater resistor. As an optimization,these pulses are omitted when a certain current threshold has been met.Results show that the system can measure temperature with±1◦C accuracy, however more fullsystem measurements are required to ensure functionality as a whole.