Title:
DEVICE FOR MEASURING GROUND SHOE OF AUTOMATIC TRAIN STOP DEVICE
Document Type and Number:
Japanese Patent JP2568991
Kind Code:
B2
Abstract:
PURPOSE: To provide the maintenance using an ordinary commercial vehicle by accurately obtaining a resonance frequency and Q of a ground shoe in a short measuring time.
CONSTITUTION: The output signal of a multifrequency generator 1 is amplified by an amplifier 3 through a low pass filter 2, and is applied to a primary coil of an on-vehicle shoe 4. The signal generated by a secondary coil of the on- vehicle shoe 4 is amplified by an amplifier 6, and is converted from the analog signal to the digital signal by an AD converter 8 to obtain the digital discrete data. When the signal at a threshold value or more is input, a level detector 9 sends the write pulse signal to a buffer memory 10. The buffer memory 10 stores 2 pieces of input data. These data are sent to a personal computer 12 through an RS232C interface circuit 11. The personal computer 12 performs the computing such as FFT of the data, which is sent to the personal computer 12, to compute the resonance frequency and Q.
Inventors:
Kazuo Ichikawa
Atsushi Tsurumi
Kenichi Shiraishi
Shoichi Suzuki
Atsushi Tsurumi
Kenichi Shiraishi
Shoichi Suzuki
Application Number:
JP9174192A
Publication Date:
January 08, 1997
Filing Date:
March 17, 1992
Export Citation:
Assignee:
Railway Technical Research Institute
Kenwood Corporation
Kenwood Corporation
International Classes:
B60L3/12; G01R27/26; (IPC1-7): G01R27/26
Attorney, Agent or Firm:
Masao Shibata