Liquid Level Transmitter Utilizing Low Cost, Capacitive, Absolute Encoders

摘要

A liquid level monitoring and transmission system includes a mechanical assembly in communication with the liquid in a container and a dual electronic encoder assembly in communication with the mechanical assembly for determining liquid level. The dual electronic encoder assembly includes a first encoder for encoding data indicative of fine level measurements and a second encoder for encoding data indicative of coarse level measurements. The system further includes at least one processor for controlling operation of the first and second encoders and for processing encoded data therefrom and a power control system.

主权项

1. A process for controlling a liquid level monitoring and transmission system to determine liquid levels in multiple storage containers, the process comprising:
interrogating, by a host server, a transmission gauge of each of the multiple storage containers periodically to obtain a composite level reading; responsive to the interrogation by the host server, powering on a dual electronic absolute capacitive encoder assembly in communication with a mechanical assembly for determining a composite liquid level in each of the multiple storage containers; deriving a current liquid level for each of the multiple storage containers by the host server in accordance with a filter algorithm, wherein for each of the multiple storage containers, the filter algorithm inserts successive composite level readings into an array having a predetermined number of slots, sorts the composite level readings from least to greatest value and selects a middle value in the sorted array as the current liquid level.