发明名称 |
Paper conveying apparatus, jam detection method, and computer-readable, non-transitory medium |
摘要 |
There are provided a paper conveying apparatus, a jam detection method and a computer-readable, non-transitory medium that can suppress erroneous detection of a jam. The paper conveying apparatus includes a sound signal generator, provided with a sound detector near a conveyance path of a paper, for generating a sound signal, and a sound jam detector for determining whether a jam has occurred based on a variation of a component of the sound signal. |
申请公布号 |
US8991820(B2) |
申请公布日期 |
2015.03.31 |
申请号 |
US201313963920 |
申请日期 |
2013.08.09 |
申请人 |
PFU Limited |
发明人 |
Hongo Masanobu;Funada Tetsuo;Yamazaki Nobuhisa |
分类号 |
B65H7/02;B65H5/00;B65H7/06 |
主分类号 |
B65H7/02 |
代理机构 |
Christie, Parker & Hale, LLP |
代理人 |
Christie, Parker & Hale, LLP |
主权项 |
1. A paper conveying apparatus comprising:
a sound signal generator, provided with a sound detector near a conveyance path of a paper, for generating a sound signal corresponding to a sound generated by the paper during conveyance of the paper; a frequency signal generator for generating a frequency signal by converting the sound signal to frequency; and a sound jam detector for determining whether a jam has occurred, based on a sum of differences of values of frequency components of the frequency signal and values of adjoining frequency components which respectively adjoin the frequency components, or based on a difference of a maximum value of the frequency signal and a minimum value of the frequency signal, or based on a difference of a value of the frequency signal at a predetermined frequency and an average value of the frequency signal or a difference of a value of the frequency signal at a predetermined frequency and a minimum value of the frequency signal, or based on a ratio of a first average value of the frequency signal at a first frequency band and a second average value of the frequency signal at a second frequency band which has a minimum frequency the same as a minimum frequency of the first frequency band and which has a maximum frequency higher than a maximum frequency of the first frequency band, or based on a ratio of a third average value of the frequency signal at a third frequency band and a fourth average value of the frequency signal at a fourth frequency band higher than the third frequency band. |
地址 |
Kahoku-shi unknown |