Transducer health and offset calibration processing system

Details Transducer health and offset calibration processing system Transducer health and offset calibration processing system

1992-08-03

1994-01-25

Myracle, Jerry W.

Measuring and testing

Brake testing

Vehicle installation

188 111, G01L 528

Patent

active

052807185

ABSTRACT:
A transducer health and offset calibration processing arrangement for a multiple axle railway vehicle including a brake cylinder transducer correction function circuit coupled to a stuck/dragging brake signal terminal, a brake command signal terminal, and a power/brake trainline signal terminal. A zero speed latch circuit and a transducer circuit interface health check circuit connected to a zero speed signal terminal. A first three-input AND gate connected to the zero speed signal terminal, a snowbrake trainline signal terminal, and a Servotrol output signal terminal. A second three-input AND gate coupled to the output of the first three-input AND gate and a highest axle speed signal terminal. A minimum axle rate discriminator circuit connected to each of plurality of axle rate signal terminals of the multiple axles of the railway vehicle. A brake cylinder pressure circuit check and a brake cylinder pressure signal generator coupled to a truck brake cylinder pressure signal terminal. The brake cylinder pressure signal generator, a transducer circuit interface health check circuit, and the transducer cylinder transducer correction function circuit coupled to a timer input signal terminal. A transducer offset initialization function circuit connected to a cold start input terminal. The minimum axle rate determination circuit having an output connected to the second three-input AND gate which has an output connected to a check and recalibrate enable function circuit.

REFERENCES:
patent: 4520663 (1985-06-01), Moore et al.
patent: 4979391 (1990-12-01), Drake et al.

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