Abstract: A shock strut assembly may comprise a strut cylinder and a strut piston configured to telescope relative to the strut cylinder. A torque link may be pivotally coupled to the strut cylinder. A rotational position sensor may be configured to measure an angle of the torque link relative to a plane parallel to a center axis of the strut piston. The rotational position sensor may be oriented such that the rotational position sensor is within a null accuracy band of the rotational position sensor when the strut piston is in a fully compressed state.

Abstract: Described herein is a system and method to enable a wireless power transmission link system. The wireless power transmission link system may comprise a rotatable axle and an optional telemetry unit interior to the axle. The wireless power transmission link system may comprise a first cup located interior to the telemetry unit and/or the axle. The first cup may comprise a first channel for housing a first wrapped coil. The wireless power transmission link system may comprise a second cup located interior to the telemetry unit and/or axle separated by an air gap from the first cup. The second cup may comprise a second channel for housing a second wrapped coil. The first wrapped coil and the second wrapped coil may be inductively coupled. The first cup and/or the second cup may comprise ferromagnetic material properties.

Abstract: A brake wear sensor is disclosed. In various embodiments, the brake wear sensor includes a bias member configured for connection between a stationary portion of a brake mechanism and a heat sink; and a load cell configured to measure a load in the bias member representative of a length of the heat sink.

Abstract: A brake wear sensor is disclosed. In various embodiments, the brake wear sensor includes a bias member configured for connection between a stationary portion of a brake mechanism and a heat sink; and a load cell configured to measure a load in the bias member representative of a length of the heat sink.

Abstract: A variable inductor direction sensor may include a rotatable body having a first circumferential tooth array and a stationary body having a second circumferential tooth array. The second circumferential tooth array may be concentric with the first circumferential tooth array. The rotatable body may be disposed relative to the stationary body such that one of the first circumferential tooth array and the second circumferential tooth array circumscribes the other of the first circumferential tooth array and the second circumferential tooth array. Further, at least one of the first circumferential tooth array and the second circumferential tooth array has a non-uniform circumferential geometry.

Abstract: A shock strut assembly may comprise a strut cylinder and a strut piston configured to telescope relative to the strut cylinder. A torque link may be pivotally coupled to the strut cylinder. A rotational position sensor may be configured to measure an angle of the torque link relative to a plane parallel to a center axis of the strut piston. The rotational position sensor may be oriented such that the rotational position sensor is within a null accuracy band of the rotational position sensor when the strut piston is in a fully compressed state.

Abstract: A system for producing an insulating glass unit having at least two lites separated by a spacer material is disclosed. The system includes a heating mechanism to heat one or both of the lites to achieve rapid wet-out of the spacer material on the lites. A method of producing an insulating glass unit including heating one or both lites is further disclosed.

Abstract: A variable inductor direction sensor may include a rotatable body having a first circumferential tooth array and a stationary body having a second circumferential tooth array. The second circumferential tooth array may be concentric with the first circumferential tooth array. The rotatable body may be disposed relative to the stationary body such that one of the first circumferential tooth array and the second circumferential tooth array circumscribes the other of the first circumferential tooth array and the second circumferential tooth array. Further, at least one of the first circumferential tooth array and the second circumferential tooth array has a non-uniform circumferential geometry.

Abstract: A distributed sensing system is provided. The system may have a primary portion and a distributed sensing portion separated by an air gap. The primary portion and the distributed sensing portion may be inductively coupled by a transformer having a primary coil and a secondary coil. A controller may direct a power supply to drive the primary coil with a driving waveform. The controller may vary a frequency of the driving waveform to substantially equal a resonant frequency of the transformer. The controller may monitor the power transfer between the primary coil and the secondary coil and may vary the frequency of the driving waveform in response. In this manner, the amount of power transferred from the primary coil to the secondary coil may be optimized in response to the controller substantially matching the driving waveform to the resonant frequency of the transformer.

Abstract: A control unit supplies power and data through a rotary transformer to a sensor assembly disposed on a wheel. The data sent by the control unit to the sensor assembly is produced by modulation of the power signal using frequency shift key or amplitude shift key modulation. The sensor assembly converts the received power signal that power to operate the circuitry and sensor assembly, converts the FSK or ASK data signal, and sends sensor data back to the control unit through the rotary transformer by load modulation. The control unit demodulates the load modulated sensor data.

Abstract: A system includes a wheel, a hubcap coupled to the wheel and a tire pressure sensor coupled to the wheel. The system also includes a brake control unit (BCU) and an active hubcap circuit coupled to the hubcap. The active hubcap circuit is electrically coupled to the tire pressure sensor and the BCU and configured to receive an input signal from at least one of the tire pressure sensor or the BCU, generate an output signal by increasing a signal to noise ratio of the input signal and output the output signal to at least one of the BCU or the tire pressure sensor.

Abstract: Distributing sensing systems that are capable of wirelessly communicating power and data over power lines are provided. The distributed sensing system may comprise a distributed sensing portion and a primary portion. The distributed sensing portion may include a sensor, an analog to digital converter (“ADC”) and a microcontroller. The sensor may be capable of monitoring a parameter. The sensor may be configured to output an analog reading. The ADC may be configured to convert the analog reading to a digital signal. The microcontroller may be configured to modulate a power signal to encode the digital signal in the power signal. The primary portion may be configured to wirelessly receive the power signal from the distributed sensing portion. The primary portion may include a signal demodulation module. The signal demodulation module may be configured to extract the digital signal from the power signal.

Abstract: Described herein is a system and method to enable a wireless power transmission link system. The wireless power transmission link system may comprise a rotatable axle and an optional telemetry unit interior to the axle. The wireless power transmission link system may comprise a first cup located interior to the telemetry unit and/or the axle. The first cup may comprise a first channel for housing a first wrapped coil. The wireless power transmission link system may comprise a second cup located interior to the telemetry unit and/or axle separated by an air gap from the first cup. The second cup may comprise a second channel for housing a second wrapped coil. The first wrapped coil and the second wrapped coil may be inductively coupled. The first cup and/or the second cup may comprise ferromagnetic material properties.

Abstract: Described herein is a system and method to enable a wireless power transmission link system. The wireless power transmission link system may comprise an axle and an optional telemetry unit interior to the axle. The wireless power transmission link system may comprise a first cup located interior to the telemetry unit and/or the axle. The first cup may comprise a first channel for housing a first wound coil. The wireless power transmission link system may comprise a second cup separated by an air gap from the first cup. The second cup may comprise a second channel for housing a second wound coil. The first wound coil and the second wound coil may form a portion of an inductively coupled, resonant, air-core transformer. The first cup and/or the second cup may comprise ferromagnetic material properties.

Abstract: A handheld interrogation device includes a controller configured to generate a power signal. The controller is also configured to determine tire pressure data based on a signal received from a tire pressure sensor. The handheld interrogation device also includes a primary coil coupled to the handheld interrogation device and configured to transmit the power signal to a sensor coil of the tire pressure sensor and to receive a data signal from the sensor coil, via inductive coupling, in response to the primary coil being within a predetermined distance of the sensor coil.

Abstract: A handheld interrogation device includes a controller configured to generate a power signal. The controller is also configured to determine tire pressure data based on a signal received from a tire pressure sensor. The handheld interrogation device also includes a primary coil coupled to the handheld interrogation device and configured to transmit the power signal to a sensor coil of the tire pressure sensor and to receive a data signal from the sensor coil, via inductive coupling, in response to the primary coil being within a predetermined distance of the sensor coil.

Abstract: A distributed sensing system is provided. The system may have a primary portion and a distributed sensing portion separated by an air gap. The primary portion and the distributed sensing portion may be inductively coupled by a transformer having a primary coil and a secondary coil. A controller may direct a power supply to drive the primary coil with a driving waveform. The controller may vary a frequency of the driving waveform to substantially equal a resonant frequency of the transformer. The controller may monitor the power transfer between the primary coil and the secondary coil and may vary the frequency of the driving waveform in response. In this manner, the amount of power transferred from the primary coil to the secondary coil may be optimized in response to the controller substantially matching the driving waveform to the resonant frequency of the transformer.

Abstract: A system includes a wheel, a hubcap coupled to the wheel and a tire pressure sensor coupled to the wheel. The system also includes a brake control unit (BCU) and an active hubcap circuit coupled to the hubcap. The active hubcap circuit is electrically coupled to the tire pressure sensor and the BCU and configured to receive an input signal from at least one of the tire pressure sensor or the BCU, generate an output signal by increasing a signal to noise ratio of the input signal and output the output signal to at least one of the BCU or the tire pressure sensor.

Abstract: A method is provided for detecting an uncommanded brake overdrive condition in an aircraft brake control system. Method comprises monitoring, by an electric brake actuator controller (EBAC) in the brake control system, at least one of the following: a load cell current for deviation from a nominal load cell current and a load cell output signal (LC Sig+) and (LC Sig?) of a plurality of individual load cells and an excitation voltage signal comprising a (Vexc+) signal and a (Vexc?) signal. EBAC detects at least one resistance disturbance indicating the uncommanded brake overdrive condition if load cell current is less than nominal load cell current, if an absolute value of the difference between a sum of LC Sig+LC Sig? for at least one individual load cell and a sum of Vexc++Vexc? is greater than a predefined threshold, or both.

Abstract: Distributing sensing systems that are capable of wirelessly communicating power and data over power lines are provided. The distributed sensing system may comprise a distributed sensing portion and a primary portion. The distributed sensing portion may include a sensor, an analog to digital converter (“ADC”) and a microcontroller. The sensor may be capable of monitoring a parameter. The sensor may be configured to output an analog reading. The ADC may be configured to convert the analog reading to a digital signal. The microcontroller may be configured to modulate a power signal to encode the digital signal in the power signal. The primary portion may be configured to wirelessly receive the power signal from the distributed sensing portion. The primary portion may include a signal demodulation module. The signal demodulation module may be configured to extract the digital signal from the power signal.