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Oil condition detecting apparatus

  • US 4,785,287 A
  • Filed: 12/18/1987
  • Issued: 11/15/1988
  • Est. Priority Date: 12/25/1986
  • Status: Expired due to Fees
First Claim
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1. An oil condition detecting apparatus for detecting the condition of an oil comprising:

  • a. ultrasonic wave transmitter and receiver means adapted to be immersed in an oil for transmitting an ultrasonic wave in response to a transmission timing signal, and for responding to an ultrasonic wave received thereby to generate an ultrasonic reception signal;

    b. a reflector plate adapted to be immersed in said oil and disposed opposite said ultrasonic wave transmitter and receiver means, for reflecting the transmitted ultrasonic wave from said ultrasonic wave transmitter and receiver means toward said ultrasonic wave transmitter and receiver means;

    c. oil condition detector means connected to receive the ultrasonic reception signal generated by said ultrasonic wave transmitter and receiver means in response to the reflected ultrasonic wave, said oil condition detector means being operative to sense a change in the waveform of the ultrasonic reception signal in terms of a change in time, based on the fact that the waveform of the ultrasonic reception signal varies in dependence upon a change in the condition of said oil, and to generate an oil condition signal representative of the condition of said oil in correspondence with the change in time; and

    d. indicator means connected to receive said oil condition signal for indicating the condition of said oil on the basis of said oil condition signal.

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