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ANALYZER FOR CONTROL SYSTEM WHICH REGULATES VEHICLE BRAKING

  • US 3,841,712 A
  • Filed: 08/01/1972
  • Issued: 10/15/1974
  • Est. Priority Date: 08/01/1972
  • Status: Expired due to Term
First Claim
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1. An anlyzer for use with a regulated braking arrangement having a control system including a power line, at least one sensor input for receiving a signal related to wheel velocity, and a pressure relief signal output connection for coupling to a solenoid winding to provide a signal which reduces braking pressure and obviates wheel lock-up, which analyzer comprises:

  • a sensor resistance test circuit, having an input connection for coupling to the sensor input in the control system, operative to determine whether the sensor resistance value is between predetermined upper limit and lower limit values, including a reference resistor connected to complete a voltage divider with the sensor under test, an indicator circuit, including a first transistor series-coupled with an indicator component, means including a second transistor for turning on the first transistor when the effective resistance of the sensor under test is below the predetermined upper limit value, and means including a third transistor for turning off the first transistor when the effective resistance of the sensor under test is below the predetermined lower limit value; and

    a power supply stage, connected to receive power from the control system and to energize the sensor resistance test circuit.

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