Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1987-06-15
1988-04-26
Orsino, Joseph A.
Communications: electrical
Condition responsive indicating system
Specific condition
340671, 340658, 180 791, 180168, 180169, 172 2, 172 3, 303 92, 318605, 324161, G08B 2100, B62D 504, G05B 1931, A01B 4106
Patent
active
047407786
ABSTRACT:
In the field of automated guided vehicles it is particularly important that speed and steering angle feedbacks be accurate and reliable. Any deviations in these feedback signals should be promptly detected and used to alter operation of the vehicle. An apparatus constantly monitors the time varying output signals of a pair of resolvers respectively associated with wheel rotation and steering angle. The loss of either of the resolver signals for more than a preselected duration of time related to the excitation frequency and vehicle speed results in the power delivered to an electric drive motor being discontinued and the vehicle brakes being applied.
REFERENCES:
patent: 4355305 (1982-10-01), Cording et al.
patent: 4446950 (1984-05-01), Wise et al.
Harding Joseph J.
Noviski Victor E.
Caterpillar Industrial Inc.
Jackson Jill D.
Morgan Terry D.
Muir Robert E.
Orsino Joseph A.
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