Medasonics, Inc.

Flex Ltd.

Ftc Solar, Inc.

Andras Boross

Anastasios Golnas

William C Lee

Stephen James Voss

Nagendra Srinivas Cherukupalli

Neil J Sheehan

Christopher Andrew Clarke

Peter Swerling

Delmer D Fisher

Stephan P Nebbia

Del D Fisher

Bruno Bissonnette

Mary E Rossman

Barry E Zakar

Amitabh Singh

Nick Okasinski

Joseph Philip

Cheau-Long Ng

Jon Dovala

A method for scheduling cleaning of a photovoltaic ('PV') system is implemented by a soiling monitoring computer system. The method includes determining a soiling level and a soiling rate for a photovoltaic (PV) system, calculating a cost associated with cleaning the PV system at each of a plurality of possible cleaning times, determining an expected energy output gain associated with cleaning the PV system at each of the plurality of possible times based on the soiling level and the soiling rate, calculating an expected benefit associated with cleaning the PV system at each of the plurality of possible cleaning times based on the expected energy output gain associated with each possible cleaning time, determining a first time of the plurality of possible times when the expected benefit exceeds the cost, and scheduling a cleaning time based on at least the determined first time.

Methods and systems for schedule-based and alert-based cleaning of PV systems

A method for performance ratio-based scheduling of solar system maintenance is implemented by a monitoring computing device. The monitoring computer device includes a processor in communication with a memory. The method includes receiving a plurality of production data associated with a solar system, determining at least one performance ratio based upon at least a portion of the plurality of production data wherein each performance ratio is associated with a range of expected performance values, validating the at least one performance ratio, determining that the at least one performance ratio is outside the range of expected performance values, and adjusting a maintenance schedule associated with the solar system based upon the at least one performance ratio.

Methods and systems for performance ratio-based scheduling of solar module maintenance

A probe in a hand held ultrasonic Doppler fetal heart beat detector and monitoring system comprising a crystal for transmitting ultrasonic energy, a variable power source connected to said crystal for driving the crystal at a selected power setting and a microprocessor for selecting a power setting for the variable power source.

Portable hand held doppler fetal heart rate probe with selective power

A noise controller for use in a probe in a hand held ultrasonic Doppler fetal heart beat detection and monitoring system where the probe includes a crystal for generating an input signal as a function of the ultrasonic energy in received ultrasonic wave and a detector for generating a first signal from the input signal. The noise controller comprises a volume controller for receiving the first signal and for processing the first signal to produce an analog signal as the output of the probe. A detector generates a second signal whenever break noise is detected in the first signal. A muting circuit immediately lowers the amplitude of the analog signal upon detection of break noise by the detector thereby substantially attenuated in the analog signal the break noise which occurred in the first signal.

Noise controller for automatically detecting and attenuating break noise

Doppler Ultrasound techniques have been used for many years to measure the flow rate of fluids. One of the challenges in using these techniques is to separate fluid flow signal from background noise. The present invention is directed to methods and apparatus for automatically distinguishing fluid flow signal from noise. It is found that noise in Doppler ultrasound techniques has characteristic of a white Gaussian spectral distribution and the mean noise can be characterized as a constant. The present invention involves measuring ultrasonic signals, generating sets of discrete spectral components from these signals, and statistically determining a maximum likelihood estimation from the spectral components. This estimation is used to calculate the fluid velocity.

Methods and apparatus for automatically determining edge frequency in

A transcranial Doppler (TCD) probe fixation assembly is provided comprising an assembly for holding a TCD probe. The probe holding assembly comprises in one embodiment a track assembly and in another embodiment a single bar assembly. The ends of both the track assembly and bar assembly are connected to an annular member. Strap retaining members are provided on the exterior of the annular member for strapping the TCD probe to a patient's head. In use, the position of the probe is selected by moving the probe linearly along the track and bar assemblies and by rotating the track and bar assemblies relative to the annular member. Thereafter, the probe is angulated until a desired signal is obtained, at which point it is locked in place.

Transcranial doppler probe wheel and track/bar fixation assembly

A TCD probe mounting assembly is provided comprising a TCD probe mounted in a pedestal which has affixed to the base thereof an adhesive material for adhesively securing the pedestal to a patient's head. The pedestal is designed to allow insertion of the TCD probe therein after the pedestal is secured to a patient's head and for holding the probe at a selected angulation by means of friction after the probe is inserted in the pedestal. An external compression device and strap member are supplied to provide alternative means for providing a force perpendicular to a patient's head in order to minimize the risk of air gaps between the probe and the patient's head.

Transcranial doppler probe mounting assembly with external compression

Growing community of inventors

Belmont, CA, United States of America

Andras Boross