Research of the characteristics of the acceleration sensors based on optical tunneling effect

Аuthors

Busurin V. I.^*, Naing T. L., Berdjugin N. A., Akhlamov P. S.^**

Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia

*e-mail: vbusurin@mai.ru
**e-mail: pakhlamov@hotmail.com

Abstract

Accelerations measurement in aggressive environments and high temperature conditions, typically performed in aviation and space equipment, in particular in aviation engines, may be implemented using a quartz transducer based on optical tunneling effect (OTE).
A typical OTE-based quartz acceleration transducer consist of a reflecting quartz prism, a quartz sensor element (beam), a source of light, a light receiver and a processor. Measuring the gap between the quartz prism and the quartz beam provides information about the pressure in a controlled environment. The quartz beam fixed at one end or at both can be used as a sensor element in the OTE-based quartz force transducer, which would consist of the same elements as a quartz pressure transducer and would have the same method of measurement.
Some aspects of the influence of acceleration on the sensor elements of an OTE-based quartz transducer are considered in this article. It is shown that the sensor’s reflectivity and output parameters of a quartz pressure transducer depend on the measured acceleration range, as well as on the design parameters of the sensor and on the initial gap between the quartz prism and quartz beam. The size of the gap has an influence on the reflectivity. The bigger the initial gap is, the smaller the influence of the acceleration on the output parameters of the OTE-based quartz pressure transducer. On the other hand, a large initial gap has a negative influence on acceleration sensitivity. The graphs of correlation between the size of the gap and the value of acceleration are presented. The gap calculations formula includes the parameters of quartz Young’s modulus and Poisson’s ratio.
The measurement error due to the temperature on an OTE-based quartz acceleration transducer is calculated to be of a fraction of a percent. Its influence on the measurement range is also found and described. This results make it possible to use such transducers in aviation engines.

Keywords:

aero engines, aggressive environment, high temperature, quartz transducer, acceleration, receptive element, beam,

References

1. Busurin V. I., Kazaryan A. V., Jeglow M. A., Zwej Nej Zo, Vestnik Moskovskogo aviatsionnogo instituta 2012,vol.19, no. 4, pp. 128-133.
2. Dolinski V.W., Mihajlow M.N. Kratkij kurs soprotivlenija materialov (Short course in strength of materials), Moscow, Vysshaja shkola, 1988, 433 p.
3. Andreewa L.E., Ponomarew S. D. Raschet uprugih jelementov mashin i priborov (Calculation of elastic elements of machinery and instruments), Moscow, Mashinostroenie, 1980, 326 p.

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