Schneider Electric Systems Usa, Inc.

Shahid Ansari

Ajay P Mishra

Anupam Saurabh

Krishnamohan Botsa

Ajay Mishra

A high-speed scalable backplane enables communications between a central processing unit (CPU) module and field input/output (I/O) and/or communication modules. The backplane comprises a root hub associated with the CPU module. The backplane also includes a plurality of Universal Serial Bus (USB) hubs sequentially coupled to each other and arranged according to the tiered architecture. Each of the USB hubs has an upstream port and a plurality of downstream ports. A top USB hub has an upstream port coupled to a host port of the root hub. One or more lower USB hubs each have an upstream port coupled to a selected downstream port of one of the USB hubs in an immediately preceding tier of the tiered architecture. The lower USB hubs are each configured to enable a plurality of I/O and/or communications connections for the modules via a plurality of downstream ports.

Universal serial bus (USB) backplane

Systems and methods for measuring rotational frequency in rotating machines use variable sliding windows of measurement. The systems and methods count and store the number of internal clock cycles between the start of a measurement interval and each pulse signal from a pulse generator. Rotational frequency is determined by taking a difference between the count for a most recent pulse signal and the count for some previous pulse signal within the measurement interval. The number of pulse signals that have occurred between the most-recent pulse signal and the previous pulse signal represents a window of measurement. This window of measurement, or the size thereof, may then be used along with the count difference to determine the rotational frequency. The window of measurement may then be slid to the counts for next most recent pulse signal and the next previous pulse signal to obtain a new count difference, and so on.

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Hyderabad Telangana, India

Shahid Ansari