Pressure sensor assemblies and methods of detecting pressure within an engine

A pressure sensing method for an engine of an aircraft, the pressure sensing method comprising:

• coupling a transceiver assembly to a portion of the engine;
• coupling a pressure sensor assembly to a fan blade of the engine;
• transmitting, from the transceiver assembly, a first signal at a first frequency and a second signal at a second frequency that differs from the first frequency;
• receiving, by the pressure sensor assembly, the first signal and the second signal;
• transmitting, by the pressure sensor assembly, a third signal at a third frequency that is a difference between the first frequency of the first signal and the second frequency of the second signal;
• receiving, by the transceiver assembly, the third signal at the third frequency;
• and
• determining a pressure in relation to the engine based on the third signal.

An aircraft comprising:

• an engine including a housing and a fan blade within the housing;
• and
• a pressure sensing system comprising:
• a transceiver assembly coupled to a portion of the engine;
• a pressure sensor assembly coupled to the fan blade,
• wherein the transceiver assembly is configured to transmit a first signal at a first frequency and a second signal at a second frequency that differs from the first frequency, wherein the pressure sensor assembly is configured to receive the first signal and the second signal and transmit a third signal at a third frequency that is a difference between the first frequency of the first signal and the second frequency of the second signal, wherein the transceiver assembly is configured to receive the third signal at the third frequency, and wherein a pressure in relation to the engine is configured to be determined based on the third signal;
• one or more waveguides extending into the housing of the engine, wherein the first signal and the second signal are configured to be transmitted through the one or more waveguides, and wherein the third signal is configured to be received through the one or more waveguides;
• and
• a pressure determination control unit configured to determine the pressure by analyzing the third signal.