Additive control method utilizing smart redundant feedback
US11931920B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2020 |
| Grant date | Mar 19, 2024 |
| Priority date | — |
| Expiry date | Dec 1, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/14
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The disclosure provides a method of monitoring a flow rate of a liquid additive comprising measuring the flow rate of the liquid additive with a flow meter; transmitting the measurements of the flow rate to a controller; transmitting, from a variable frequency drive (VFD), measurements of a rotational speed of a motor to the controller, wherein the VFD is coupled to the motor; transmitting measurements from a level sensor to the controller; determining whether the flow rate of the liquid additive is a non-zero rate; utilizing the measurements transmitted to the controller as feedback to compare against a designated set point; calculating an error between the feedback and the designated set point to calculate an updated output; and transmitting the updated output to the VFD to change the flow rate of the liquid additive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.