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Microfluidic gyroscope drive and detection technology

Author: ZuoHongJie
Tutor: ZhuXinHua；SuYan
School: Nanjing University of Technology and Engineering
Course: Measuring Technology and Instrument
Keywords: Microfluidic gyroscope Driver detection circuit Digital demodulation Temperature compensation
CLC: V241.5
Type: Master's thesis
Year: 2011
Downloads: 37
Quote: 0
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Abstract


Microfluidic gyroscope to replace the use of gas medium the mechanical mass as the sensitive element, has the advantages of simple structure, large range, strong impact, both in military and civilian areas has broad application prospects. This paper introduces the research work around the microfluidic gyroscope the driver detection circuit design and test carried out. First drive and sense of microfluidic gyroscope mechanism, and on this basis, the design based on the principle of modulation and demodulation of microfluidic gyroscope measurement and control circuit. The paper introduces a digital microfluidic gyroscope design work, including the two parts of the design of the microfluidic gyroscope digital interface circuit design and digital measurement and control circuit. Microfluidic gyroscope digital interface main function is to digitize the output voltage of the analog circuit can be collected while the temperature of the gyroscope, and digital filtering and temperature compensation using a microcontroller, and ultimately through the serial output of the digitized voltage signals of the gyroscope. Microfluidic gyroscope digital measurement and control circuit is sensitive to the structure of the front differential amplifier output directly quantified using digital demodulation completed MSP430 microcontroller-based digital systems, gyroscopes and resources generated by the microcontroller internal timer required a drive with a reference square wave signal. The the digitized measurement and control circuit not only reduces the noise introduced by the analog circuitry, and can play the advantages of digital circuit integration and miniaturization. Finally, the paper introduced the design is completed based analog the microfluidic circuit gyroscope prototype microfluidic gyroscope digital interface prototype microfluidic gyroscope digital measurement and control circuit debug and test prototype, and test results were analyzed and summary. The test results show that the microfluidic gyroscope prototype-based analog circuit threshold and resolution of 1 ° / s, and bias stability of 3.873 ° / s and ± 1200 ° / s range, impact resistance capacity of 20,000 g. The digital interface prototype microfluidic gyroscope threshold and a resolution of 1 ° / s, the bias stability improve to 2.161 ° / s. The model temperature test temperature compensation, the gyroscope gyroscope zero temperature coefficient of 0.285 ° / s / ℃ to 0.093 ° / s / ℃, a decrease of 66.3%. The prototype microfluidic gyroscope digital measurement and control circuit threshold and a resolution of 1 ° / s, bias stability improve to 1.061 ° / s. The tests proved the effectiveness of the digital interface, and the the digitized measurement and control circuit.

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CLC: > Aviation, aerospace > Aviation > Aircraft instrumentation,avionics, flight control and navigation > Aircraft instrumentation,aerospace equipment > Gyro instrument
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