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Servovalve analyzer system

  • US 4,916,641 A
  • Filed: 01/16/1987
  • Issued: 04/10/1990
  • Est. Priority Date: 01/16/1987
  • Status: Expired due to Term
First Claim
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1. An analyzer system for analyzing hydraulic units under test comprising:

  • a digital data processing system storing a plurality of test unit definition tables and a plurality of transducer definition tables, the transducer definition tables including a transducer definition table for a transducer that senses a physical condition associated with an hydraulic unit that is being tested and a definition table for a servo amplifier transducer, each transducer definition table including an identification of a transducer to which the table corresponds and calibration data defining a relationship between data communicated with the transducer and corresponding physical conditions associated with the transducer; and

    a transducer interface system including a digital to analog converter connected to receive a digital command signal from the data processing system and generate an analog signal in response thereto, an analog to digital converter connected to receive an analog signal and provide to the data processing system a digital signal in response thereto, a servo amplifier connected to receive an analog signal from the digital to analog converter and respond thereto by providing a control signal to an hydraulic unit under test, and a signal conditioning circuit connected to receive a transducer signal from a transducer indicating a physical condition associated with an hydraulic unit under test;

    the digital data processing system being responsive to data contained in an operator selected test unit definition table to command at least one test sequence listed in the selected test unit definition table by providing to the digital to analog converter digital command signals corresponding in magnitude to calibration data contained in the transducer definition table for the servo amplifier, the digital data processing system receiving from the analog to digital converter data representing the physical condition, interpreting the received data in response to the calibration data stored in the transducer definition table for the physical condition sensing transducer and generating a human readable output representing results of the test.

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