Oil condition detecting apparatus
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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Abstract
An instrument for detecting the condition of an oil is provided in which an ultrasonic wave having a predetermined waveform is propagated through the oil and assumes a change in waveform in accordance with the particular condition of the oil. The instrument includes an arrangement in which any change in the waveform of the propagated ultrasonic wave is translated into a change in terms of time involving the waveform, which is used for the detection of the particular condition of the oil.
19 Citations
14 Claims
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1. An oil condition detecting apparatus for detecting the condition of an oil comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An oil condition detector apparatus for detecting the condition of an oil oomprising:
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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 detect a change in the waveform of the ultrasonic reception signal as a change in the length of a delay from the time of generation of the transmission timing signal to a time at which the ultrasonic reception signal exceeds a predetermined level, and to generate an oil condition signal representative of the condition of said oil based on the change in the length of the delay detected; 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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14. An oil condition detector apparatus for detecting the condition of an oil oomprising:
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a. ultrasonic wave transmitter and reoeiver 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 detect a change in the waveform of the ultrasonic reception signal as a change in the duration of a period during which said ultrasonic reception signal exceeds a predetermined level, and to generate an oil condition signal representative of the condition of said oil based on the change in the duration detected; 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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Specification