초록 ▼

An apparatus for detecting breakage of a web of material traversing a machine for feeding the web, and a method for the same. The apparatus includes a housing for mounting three transducers, a first transducer adapted to periodically emit a burst of energy for a period of time, the burst of energy b

An apparatus for detecting breakage of a web of material traversing a machine for feeding the web, and a method for the same. The apparatus includes a housing for mounting three transducers, a first transducer adapted to periodically emit a burst of energy for a period of time, the burst of energy being reflected off an object and producing an echo signal. A second transducer adjacent to the first transducer receives a portion of the echo signal, and a third transducer also adjacent to the first transducer receives another portion of the echo signal. The strongest portion of the echo signal is used to detect whether the web is broken.

대표청구항 ▼

A method of minimizing an effect of a web wrinkle during web break detection, comprising: transmitting periodically a burst of energy for a period of time, the burst of energy being reflected off the web thereby producing an echo signal; receiving a first portion of the echo signal by a first transd

A method of minimizing an effect of a web wrinkle during web break detection, comprising: transmitting periodically a burst of energy for a period of time, the burst of energy being reflected off the web thereby producing an echo signal; receiving a first portion of the echo signal by a first transducer; receiving a second portion of the echo signal by a second transducer; determining a strength of the first portion of the echo signal and a strength of the second portion of the echo signal; comparing the strength of the first portion of the echo signal with the strength of the second portion of the echo signal to determine which portion is stronger; and analyzing the stronger portion of the echo signal to determine the presence of a web break.