Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
CONTROL EQUIPMENT
Document Type and Number:
Japanese Patent JPH02223302
Kind Code:
A
Abstract:

PURPOSE: To guarantee a fail-safe operation by outputting a brake command signal, when a train speed exceeds a limiting speed, by periodically checking whether an information through the output of a comparing means and speed information generating means is correct or not, and by outputting a brake signal also when the same check signal is outputted continuously.

CONSTITUTION: A signal as to whether a train speed deviates from a speed zone or not is outputted from speed comparing slots C1, C2. A signal as to whether the train speed exceeds a limiting speed or not is outputted from a speed comparing slot C3. A signal as to whether a tachometer generator 38 is out of order or not is outputted from a speed comparing slot C4. These signals are transmitted to a comparison results summarizing part 46. From a fault detection slot C5, an alternating signal, of which check results are alternately correct or incorrect, is generated normally and a high-level or low-level DC signal is continuously outputted at an abnormal time. When said output signal is inputted to an output gate 48, a brake command signal 106 is outputted to a braking part 36 and a braking force is given to a train.


Inventors:
TASHIRO FUSASHI
TOYODA EIICHI
SEKINO SHINICHI
Application Number:
JP25193189A
Publication Date:
September 05, 1990
Filing Date:
September 29, 1989
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HITACHI LTD
International Classes:
B60L3/08; B60L15/40; (IPC1-7): B60L3/08; B60L15/40
Attorney, Agent or Firm:
Katsuo Ogawa (2 outside)



 
Previous Patent: VEHICLE POWER CONVERTER

Next Patent: ELECTRIC CAR SYSTEM