Acoustic wave lubricity sensor

A lubricity sensor, comprising:

• a flexural plate wave device, wherein said flexural plate wave device comprises a membrane in which at least one inter-digital transducer (IDT) is formed upon in order to pump a flow of said liquid in a desired direction;
• a face shear mode bulk acoustic wave device associated with and located proximate to said flexural plate wave device, wherein said face shear mode bulk acoustic wave device and said flexural plate wave device form a lubricity sensor wherein acoustic wave data produced by said flexural plate device together with said face shear mode bulk acoustic wave device when said lubricity sensor is exposed to a liquid relates directly to a lubricity of said liquid thereby providing lubricity measurement data associated with said liquid, wherein said flexural plate wave device and said race shear mode bulk acoustic wave device each operation in a low operating frequency range of approximately 0.1 MHz to 100 MHz;
• and
• wherein said acoustic wave data comprises an amplitude and a phase veiocity associated with said flexural plate device and said shear mode device such that said amplitude and said phase velocity together provide an indication of said lubricity of said liquid.

A lubricity sensor, comprising:

• a flexural plate wave device, wherein said flexural plate wave device comprises a membrane in which at least one inter-digital transducer (IDT) is formed upon in order to pump a flow of said liquid in a desired direction;
• and
• a face shear mode bulk acoustic wave device associated with and located proximate to said flexural plate wave device, wherein said face shear mode bulk acoustic wave device and said flexural plate wave device form a lubricity sensor wherein acoustic wave data produced by said flexural plate device together with said face shear mode bulk acoustic wave device when said lubricity sensor is exposed to a liquid relates directly to a lubricity of said liquid thereby providing lubricity measurement data associated with said liquid,
• wherein said acoustic wave data comprises an amplitude and a phase velocity associated with said flexural plate device and said shear mode device such that said amplitude and said phase velocity together provide an indication of said lubricity of said liquid;
• wherein said acoustic wave data additionally comprises a frequency associated with said flexural plate device and said face shear mode bulk acoustic wave device such that said frequency provides an indication of said lubricity of said liquid;
• wherein said acoustic wave data further comprises an oscillation gain compensation associated with said flexural plate device and said face shear mode bulk acoustic wave device such that said oscillation gain compensation provides an indication of said lubricity of said liquid;
• wherein a vibration amplitude of the said flexural plate wave device is controlled by adjusting a power supplied to said flexural plate wave device;
• and
• wherein a vibration amplitude of said face shear wave bulk acoustic wave device is controlled by adjusting a power supplied to the said face shear wave bulk acoustic wave device.