The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 11, 2021
Filed:
Oct. 24, 2018
Mitsubishi Electric Corporation, Chiyoda-ku, JP;
Mitsubishi Electric Research Laboratories, Inc., Cambridge, MA (US);
Wataru Tsujita, Chiyoda-ku, JP;
Kenzo Makino, Chiyoda-ku, JP;
Atsushi Takami, Chiyoda-ku, JP;
Bingnan Wang, Cambridge, MA (US);
MITSUBISHI ELECTRIC CORPORATION, Chiyoda-ku, JP;
MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC., Cambridge, MA (US);
Abstract
A rail state monitoring apparatus () includes: first and second transmission antennas () to transmit first and second electric signals to rails (), respectively; first reception antenna () to receive a surface wave () of the first electric signal propagated through rail () and guided wave () of the second electric signal propagated through loop coil (); second reception antenna () to receive surface wave () of the second electric signal propagated through rail () and guided wave () of the first electric signal propagated through loop coil (); and a processor. The processor obtains received powers of the respective electric signals received by first and second reception antennas (), determines a rail state from 'good', 'rail broken', “rail crack”, or “rail surface anomaly” based on the received powers, and outputs the rail state as rail state information.