Servo Corporation of America

George Grosskopf

W Woodward Sanville

An on-board hot bearing detector system includes a microprocessor and heat sensors mounted on the train cars for sensing the bearing temperatures. Diagnostic circuitry is also provided to monitor the sensors and detect if a sensor is open or short. Additionally, the train line is controlled by the microprocessor and is provided with a current limiting device for protection against large currents in case of a short.

On board hot bearing detector system with fault detection

A train analysis system for analyzing a wheel condition such as wheel bearing temperature includes circuitry for identifying the wheels of a railroad car, circuitry for averaging the condition of each wheel of a car, and circuitry for establishing a threshold level for said condition, dependent on said averaging. When a wheel cannot be identified, a threshold level is set which is below the maximum level for identified wheels.

Train analysis system enhancement having threshold adjustment means for

This invention relates to a device for monitoring the temperature of the wheels of passing railroad cars. More particularly, this device includes a self-calibration function wherein a predetermined heat source is attached to the device, a fixed amplifier amplifies the resulting electric signal so as to generate a signal comparable in magnitude to that generated by a passing train, a variable gain amplifier further amplifies the signal, and the resulting signal is converted to a digital signal. The digital signal is used as a signal to the feedback input of a variable gain amplifier. In response to the digital signal, the variable gain amplifier adjusts its gain until the feedback signal reaches a predetermined value.

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Coram, NY, United States of America

George Grosskopf