Slip-slide detector system for railway car wheels
First Claim
1. In a vehicle having at least first and second axle trucks, each truck having at least two axles thereon, a slip/slide detection system comprising:
- first sensor means connected to a first axle on the first truck for generating digital signals indicative of the angular velocity of this axle;
second sensor means connected to a second axle on the first truck for generating digital signals indicative of the angular velocity of this axle;
third sensor means connected to a third axle on the second truck for generating digital signals indicative of the angular velocity of this axle;
fourth sensor means connected to a fourth axle on the second truck for generating digital signals indicative of the angular velocity of this axle;
first detecting means having its inputs connected to the outputs of the first sensor means and the fourth sensor means for detecting a preselected velocity difference between the first and fourth axles;
second detecting means having its inputs connected to the outputs of the second sensor means and the third sensor means for detecting a predetermined velocity difference between the second and third axles;
third detecting means having its inputs connected to the outputs of the third and first sensor means for detecting a preselected velocity difference between the third and first axles;
fourth detecting means having its inputs connected to the outputs of the fourth and second sensor means for detecting a preselected velocity difference between the fourth and second axles;
first gating means having inputs thereof connected to the outputs of the first and second detecting means for signifying a slip condition of the second truck or slide condition of the first truck;
second gating means having inputs thereof connected to the outputs of the third and fourth detecting means for signifying a slip condition of the first truck or slide condition of the second truck.
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Accused Products
Abstract
The inventive system comprises a magnetic pulse generator mounted on each axle of a railroad car. The outputs from the resulting pulse generators are fed to a detector which compares the speeds of the axles. When wheel slip indicated by a pulse count difference between axles is encountered, the detector operates solenoid-operated dump valves to increase brake pressure on both axles of the slipping axle truck. When axle speed recovers to a non-slipping condition, the dump valves are reset and brake pressure is reduced. The detector circuitry is also able to detect wheel slide thus permitting corrective action. In addition to the above, the system includes provision to prevent synchronous sliding of all axles by sensing the rate of change of count.
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Citations
9 Claims
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1. In a vehicle having at least first and second axle trucks, each truck having at least two axles thereon, a slip/slide detection system comprising:
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first sensor means connected to a first axle on the first truck for generating digital signals indicative of the angular velocity of this axle; second sensor means connected to a second axle on the first truck for generating digital signals indicative of the angular velocity of this axle; third sensor means connected to a third axle on the second truck for generating digital signals indicative of the angular velocity of this axle; fourth sensor means connected to a fourth axle on the second truck for generating digital signals indicative of the angular velocity of this axle; first detecting means having its inputs connected to the outputs of the first sensor means and the fourth sensor means for detecting a preselected velocity difference between the first and fourth axles; second detecting means having its inputs connected to the outputs of the second sensor means and the third sensor means for detecting a predetermined velocity difference between the second and third axles; third detecting means having its inputs connected to the outputs of the third and first sensor means for detecting a preselected velocity difference between the third and first axles; fourth detecting means having its inputs connected to the outputs of the fourth and second sensor means for detecting a preselected velocity difference between the fourth and second axles; first gating means having inputs thereof connected to the outputs of the first and second detecting means for signifying a slip condition of the second truck or slide condition of the first truck; second gating means having inputs thereof connected to the outputs of the third and fourth detecting means for signifying a slip condition of the first truck or slide condition of the second truck. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification