압전 잉크젯 헤드 모니터링 시스템
Piezo-driven inkjet printhead monitoring system
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참고문헌
키워드
초록
For the industrial printing applications, the stability of the piezo-driven inkjet printhead is a major requirement. In this paper, we focused on the failure modes of the inkjet printhead and realized a method to detect and repair them at high speed. The printhead monitoring is performed by detecting the residual vibration of the actuating plate using the self- sensing capability of the piezoelectric material. To measure the channel acoustics and to identify the malfunctioning nozzle, we devised the bridge sensing circuitry and failure detection algorithm. The residual vibration signals can be affected by the boundary conditions of the channel acoustics, so it is possible to identify the failure causes by analyzing the monitoring signals. Therefore it is also possible to apply a proper restoring process to the defective printhead. The experimental results show that this method is effective in improving the reliability of the industrial printing.
Abstract
For the industrial printing applications, the stability of the piezo-driven inkjet printhead is a major requirement. In this paper, we focused on the failure modes of the inkjet printhead and realized a method to detect and repair them at high speed. The printhead monitoring is performed by detecting the residual vibration of the actuating plate using the self- sensing capability of the piezoelectric material. To measure the channel acoustics and to identify the malfunctioning nozzle, we devised the bridge sensing circuitry and failure detection algorithm. The residual vibration signals can be affected by the boundary conditions of the channel acoustics, so it is possible to identify the failure causes by analyzing the monitoring signals. Therefore it is also possible to apply a proper restoring process to the defective printhead. The experimental results show that this method is effective in improving the reliability of the industrial printing.
참고문헌 (6)
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- Jos de Jong, "Air entrapment in piezo-driven inkjet printheads", J. Acoust. Soc. Am, 120(3), pp.1257~1265 (2006)
- M.B.Groot Wassink, "Enabling higher jet frequencies for an inkjet printhead using iterative learning control", Proceeding of the IEEE Conf. on Control Applications, pp.791~796 (2005)
- Chengkuo Lee, "Self-excited piezoelectric PZT microcantilevers for dynamic SFM with inherent sensing and actuating capabilities", Sensor and Actuators A, 72, pp.179~188 (1999)
- Victor Giurgiutiu, "Embedded Self-sensing piezoelectric active sensors for on-line structural identification", Journal of vibration and acoustics, ASME, 124, pp.116~125 (2002)
- Matthieu Guirardel, "On-chip self-sensing function of 4×4 matrix micromachined resonating piezoelectric membranes for mass applications", Proceeding of the IEEE Conf. on International Ultrasonic, Ferroelectrics and Frequency Control, pp.317~320 (2004)