Method of sampling and storing data and implementation thereof

摘要

Embodiments of methods that are useful to avoid overflow in fixed-length buffers. In one embodiment, the methods dynamically adjust parameters (e.g., sample time) and reconfigure data in the buffer to allow new data samples to fit in the buffer. These embodiments allow data collection to automatically adapt, e.g., by adjusting the sample rate to allow the data to fit in the limited buffer size. These embodiments can configure hardware and/or software on a valve positioner of a valve assembly to improve data collection for use in on-line valve diagnostics and other data processing techniques.

主权项

1. A method for storing data samples in a buffer having a plurality of buffer locations including a lead buffer location, an end buffer location, and one or more intermediary buffer locations disposed therebetween, said method comprising:
at a device comprising a processor with access to memory having executable instructions stored thereon:
receiving data samples at a sample time that defines a rate at which the data sample is received;changing the sample time from a first sample time to a second sample time that is longer than the first sample time;reconfiguring data in the buffer from a first configuration to a second configuration by moving previously-stored data samples from first buffer locations to second buffer locations that are different from the first buffer locations so as to create a plurality of available buffer locations in the buffer for data samples that correspond with the second sample time, the plurality of available buffer locations located at the first buffer locations; andwriting the data samples into the buffer at the plurality of available buffer locations according to a chronological order of the data samples.