Title:
波動受信装置および波動受信判定方法
Document Type and Number:
Japanese Patent JP4199741
Kind Code:
B2
Abstract:
An ultrasonic receiver receives an ultrasonic signal having a period in which an amplitude thereof progressively increases as time elapses. A pattern matching unit determines whether a comparative pattern, which is generated as a result of comparison between the respective maximum amplitude values of a plurality of successive waves of said wave signal and a threshold value set by a threshold setting unit, matches a reference pattern or not during the period of the ultrasonic signal. The pattern matching unit determines that the ultrasonic receiver has successfully received the ultrasonic signal if the comparative pattern matches the reference pattern.
Inventors:
Kenji Suzuki
Hiroyuki Kobayashi
Shuji Murayama
Kenji Inamoto
Hiroyuki Kobayashi
Shuji Murayama
Kenji Inamoto
Application Number:
JP2005051060A
Publication Date:
December 17, 2008
Filing Date:
February 25, 2005
Export Citation:
Assignee:
NEC Display Solutions Co., Ltd.
International Classes:
G01S11/16
Domestic Patent References:
| JP2000214258A | ||||
| JP2003222675A | ||||
| JP2004272636A | ||||
| JP51113493A | ||||
| JP2002368595A |
Attorney, Agent or Firm:
Akio Miyazaki
Ishibashi Masayuki
Masaaki Ogata
Ishibashi Masayuki
Masaaki Ogata