Medium conveyance device, control method, and control program

A method for determining whether a medium conveyance abnormality has occurred, the method comprising:

• outputting an ultrasonic wave by an ultrasonic transmitter;
• receiving the ultrasonic wave and outputting an ultrasonic signal corresponding to the received ultrasonic wave, by an ultrasonic receiver opposed to the ultrasonic transmitter;
• receiving a sound and generating a sound signal corresponding to the received sound, by a sound receiver;
• detecting atmospheric pressure, based on the ultrasonic signal;
• determining whether a medium conveyance abnormality has occurred, based on the sound signal;
• and
• modifying sensitivity of the sound receiver, correcting the sound signal, or modifying a criterion for determination of a medium conveyance abnormality, based on the atmospheric pressure.

A computer-readable, non-transitory medium storing a computer program, wherein the computer program causes a medium conveying apparatus including an ultrasonic transmitter capable of outputting an ultrasonic wave, an ultrasonic receiver opposed to the ultrasonic transmitter, to receive the ultrasonic wave and output an ultrasonic signal corresponding to the received ultrasonic wave, and a sound receiver to receive a sound and generate a sound signal corresponding to the received sound, thc program causcs thc medium to execute a process, the process comprising:

• detecting atmospheric pressure, based on the ultrasonic signal;
• determining whether a medium conveyance abnormality has occurred, based on the sound signal;
• and
• modifying sensitivity of the sound receiver, correcting the sound signal, or modifying a criterion for determination of a medium conveyance abnormality, based on the atmospheric pressure.