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Online sensor testing through superposition of encoded stimulus.

Dumas, Norbert and Xu, Zhou and Georgopoulos, Kostas and Bunyan, John and Richardson, Andrew (2007) Online sensor testing through superposition of encoded stimulus. In: Proceedings of the Design, Test, Integration and Packaging of MEMS/MOEMS, Stresa, Lago Maggiore, Italy, 25-27 April 2007. . ISBN 978-2-3550-0000-3

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    Online monitoring remains an important requirement for a range of microsystems. The solution based on the injection of an actuating test stimulus into the bias structure of active devices holds great potential. This paper presents an improved solution that aims to remove the measurand-induced signal from the sensor output. It involves encoding the test stimulus and using a covariance algorithm to reject the signal that does not contain the code. The trade-off between the sine wave rejection ratio of the technique and the test time response is studied and, in the case of a MEMS accelerometer, it is demonstrated that the rejection is higher than 14dB for a test time of about 0.7s. Furthermore, the accuracy of the test signal can be evaluated to guarantee the integrity of the online test output.

    Item Type: Contribution in Book/Report/Proceedings
    Additional Information:
    Uncontrolled Keywords: Online sensor monitoring ; online testing ; MEMS self test ; pseudo-random code ; LFSR
    Subjects: T Technology > TA Engineering (General). Civil engineering (General)
    Departments: Faculty of Science and Technology > Engineering
    ID Code: 498
    Deposited By: Dr Norbert Dumas
    Deposited On: 07 May 2007
    Refereed?: No
    Published?: Published
    Last Modified: 27 Nov 2017 00:06
    Identification Number:

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