Shandong New Beiyang Information Technology Co., Ltd.

Laser Institute of Shandong Academy of Sciences

Jian Yang

Zhaoyi Wang

Shuai Qu

Weitao Wang

The application relates to a distributed acoustic sensing voice message recognition system and method. The system includes a sensing optical fiber, configured to receive a voice message and convert the voice message into a voice signal; a laser emission unit, configured to emit a laser signal with a narrow linewidth and with spontaneous emission noise being eliminated; a circulator, configured to transmit the laser signal to the sensing optical fiber to monitor the voice signal, and receive a backward Rayleigh scattering signal from the sensing optical fiber; a collection unit, configured to collect the backward Rayleigh scattering signal emitted by the circulator; and a convolutional recurrent network unit, configured to perform complex field mapping on the backward Rayleigh scattering signal collected by the collection unit, to reconstruct the voice signal.

Distributed acoustic sensing voice message recognition system and method

A carbon ribbon recovery device includes a carbon ribbon supply roller () and a carbon ribbon recovery roller (). The carbon ribbon recovery roller () includes a first clutch plate (), a second clutch plate (), a friction element (), a recovery gear () and a spindle (); the spindle () is provided on a frame () of a printer to support a carbon ribbon (); the first clutch plate (), the second clutch plate (), the friction element () and the recovery gear () are arranged in turn on the spindle (), the first clutch plate () rotates in synchronism with the spindle (); the recovery gear (), the friction element () and the second clutch plate () can rotate around the spindle (); the recovery gear () is rotated by a carbon ribbon driving device (), and to drive the friction element () rotating, then to proceed to give the second clutch plate () a rotating force in the same direction; the second clutch plate () is matched with the first clutch plate () when the second clutch () rotates in a predetermined direction; the second clutch plate () is not matched with the first clutch plate () when the second clutch () rotates in a direction opposed to the predetermined direction. The present invention also relates to a thermal transfer printer having the carbon recovery device.

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Shandong, China

Jian Yang