Electronic equipment for monitoring yarn travel on a textile machine
AssigneeGebrueder Loepfe AG
InventorsRene Domig, Ernst Morf, Erich Loepfe
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Abstract
The present invention relates to equipment for monitoring the yarn travel on a textile machine, particularly in the shuttle of a weaving loom, comprising a piezoelectrical yarn sensing unit mounted in the shuttle and an electronic receiving circuitry outside the shuttle. The sensing unit transmits yarn travel signals of a frequency which is determined by one of the natural frequencies of the sensing unit, and the electronic receiving circuitry comprises at least one resonant circuit tuned to that natural frequency.
Claims12
Equipment for monitoring the yarn travel on a textile machine, comprising piezoelectrical yarn sensing means intended to be arranged at a moving part of the textile machine, and electronic receiving means intended to be mounted outside said moving part of the textile machine;
- said piezoelectrical yarn sensing means comprising a piezoelectrical transducer element and a yarn sensing member forming a mechanical vibratory system, and an induction coil having a winding electrically connected to the piezoelectrical transducer element;
- the induction coil winding and piezoelectrical transducer element constituting a first electrical resonant circuit tuned to one of the natural frequencies of said mechanical vibratory system;
- the electronic receiving means comprising at least one further electrical resonant circuit tuned to said natural frequency.
Equipment for monitoring yarn travel on a textile machine, comprising yarn sensing means including a piezoelectrical transducer element and a yarn sensing member forming a mechanical vibratory system, signal transmitting means including an induction coil having a winding electrically connected to the piezoelectrical transducer element, electronic means for receiving signals produced by said signal transmitting means, said induction coil winding and said piezoelectrical transducer element constituting a first electrical resonant circuit tuned to the frequency of an overtone of said mechanical vibratory system, and said electronic receiving means comprising at least one further electrical resonant circuit tuned to said overtone frequency.
Dependencies are inferred from the claim text.