Method for monitoring the proper functioning of electromagnetic

Details Method for monitoring the proper functioning of electromagnetic Method for monitoring the proper functioning of electromagnetic

1997-01-24

1998-08-04

Falik, Andy

Textiles: weaving

Weft manipulation

Weaving with stationary weft supply

73168, D03D 4730

Patent

active

057879370

ABSTRACT:
A method for monitoring the functional reliability of magnetic valves in pneumatically operated systems of an air jet loom, such as the valves for the relay nozzles, allows the failure of such a valve to be quickly detected and corrected. The characteristic progression curve (2) of the valve actuation current (I) as a function of time (t) is monitored for each magnetic valve to detect and evaluate the occurrence, relative timing, and magnitude of a characteristic feature (3), such as a current dip (3), in the increasing portion (2a) of the current progression curve (2). If the characteristic feature (3) is completely missing, or deviates in time or magnitude outside of a tolerance range relative to corresponding nominal values, then a corresponding fault signal is triggered or the weaving process is interrupted. Alternatively, the time of initiating the actuation signal for the respective valve is shifted to bring the actual operation of the valve back into the acceptable tolerance range.

REFERENCES:
patent: 4020877 (1977-05-01), Spisiak et al.
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patent: 4673004 (1987-06-01), Rosseel et al.
patent: 5031669 (1991-07-01), Wahhoud et al.
patent: 5031672 (1991-07-01), Wahhoud et al.
patent: 5067527 (1991-11-01), Le Jager

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