Title:
FAULT IDENTIFICATION AND STATE MONITORING SYSTEM AND METHOD FOR MULTI-CHANNEL PIEZOELECTRIC 3D PRINTING SPRAY HEAD
Document Type and Number:
WIPO Patent Application WO/2021/000798
Kind Code:
A1
Abstract:
Disclosed are a fault identification and state monitoring system and method for a multi-channel piezoelectric 3D printing spray head. The system comprises a spray head driving circuit, a multi-channel gating circuit, a piezoelectric signal acquisition circuit and a monitoring unit. The spray head driving circuit is used for providing a driving signal to enable a piezoelectric spray head to perform spraying; the multi-channel gating circuit is used for providing a multi-channel in-turn gating signal to realize in-turn monitoring of a plurality of spray holes of the piezoelectric spray head; the piezoelectric signal acquisition circuit uses a self-sensing detection method to acquire a residual vibration signal in a runner cavity of the piezoelectric spray head; and the monitoring unit comprises a driving voltage monitoring module, a liquid viscosity monitoring module, an ink supply pressure monitoring module and a liquid drop spray speed calculation module, and is used for monitoring the working state of the piezoelectric spray head. The system and method can effectively identify the type and cause of a fault, improve monitoring accuracy and facilitate a user in taking effective measures; no external sensor is required; in-turn monitoring reduces the hardware cost; and monitoring can be performed during a working process of a spray head, and the monitoring flexibility is improved.
Inventors:
WANG LI (CN)
HU HANGFENG (CN)
WANG KEKE (CN)
LU BINGHENG (CN)
HU HANGFENG (CN)
WANG KEKE (CN)
LU BINGHENG (CN)
Application Number:
PCT/CN2020/098572
Publication Date:
January 07, 2021
Filing Date:
June 28, 2020
Export Citation:
Assignee:
UNIV XI AN JIAOTONG (CN)
International Classes:
B29C64/393; B29C64/386; B33Y50/00; B33Y50/02
Domestic Patent References:
| WO1997011836A1 | 1997-04-03 |
Foreign References:
| CN110370648A | 2019-10-25 | |||
| CN204398329U | 2015-06-17 | |||
| CN105861308A | 2016-08-17 | |||
| CN105881898A | 2016-08-24 | |||
| GB2529009A | 2016-02-10 | |||
| US20140072777A1 | 2014-03-13 |
Other References:
KWON, K. S. ET AL.: "Low-cost and high speed monitoring system for a multi-nozzle piezo inkjet head", SENSORS AND ACTUATORS A: PHYSICAL, vol. 180, 21 April 2012 (2012-04-21), XP028512588, ISSN: 0924-4247, DOI: 20200825152235Y
KWON KYE-SI, CHOI YUN-SIK, GO JUNG-KOOK: "Inkjet jet failures and their detection using piezo self-sensing", SENSORS AND ACTUATORS A: PHYSICAL, ELSEVIER BV, NL, vol. 201, 1 October 2013 (2013-10-01), NL, pages 335 - 341, XP055772573, ISSN: 0924-4247, DOI: 10.1016/j.sna.2013.07.027
KWON KYE-SI, CHOI YUN-SIK, GO JUNG-KOOK: "Inkjet jet failures and their detection using piezo self-sensing", SENSORS AND ACTUATORS A: PHYSICAL, ELSEVIER BV, NL, vol. 201, 1 October 2013 (2013-10-01), NL, pages 335 - 341, XP055772573, ISSN: 0924-4247, DOI: 10.1016/j.sna.2013.07.027
Attorney, Agent or Firm:
XI'AN TONG DA PATENT AGENCY CO., LTD. (CN)
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