Abstract: A method for calibrating extrinsic parameters of surround-view cameras on a vehicle includes: determining extrinsic parameters of the first camera and the second camera; determining a first pose initial value, a second pose initial value, a third pose initial value, and a fourth pose initial value; determining extrinsic parameters of the third camera and fourth camera according to the extrinsic parameters of the first camera and second camera, the first pose initial value, the second pose initial value, the third pose initial value, and the fourth pose initial value. According to the visual odometer information of the first camera and the second camera, the extrinsic parameters of the first camera and second camera are first determined, and the extrinsic parameters of the third camera and fourth camera are then determined according to the extrinsic parameter of the first camera and the extrinsic parameter of the second camera.

Abstract: A cover, a fluid end and a plunger pump are provided. The cover includes: a body, the body being cylindrical, and the body including a first end, a second end, and a side surface connecting the first end and the second end; a main flow channel extending along an axis of the body; a plurality of subsidiary flow channels, each of the plurality of subsidiary flow channels being communicated with the main flow channel; a first opening, located at the first end and communicated with the main flow channel; and a plurality of second openings, located at the side surface of the body; each of the plurality of subsidiary flow channels being communicated with at least one of the plurality of second openings.

Abstract: An apparatus and method for sensor and control system, which automatically adjusts a product splitter position of a full-scale spiral. An electrical conductivity-based automation system is described and claimed herein and has been successfully developed and demonstrated as illustrated herein. The system includes a sensor and a microprocessor based and controlled servo or gear motor that is utilized to adjust the splitter of an operating coal/mineral spiral based on the readings of the sensor. The device as described and claimed herein converts a traditional coal spiral to an automated system for controlling the splitter thereby giving the spiral unit the ability to automatically adjust a key process variable, i.e., its splitter position, in real time as and when the feed coal or other mineral property changes to maintain the performance of the spiral at the optimum level.

Abstract: An apparatus and method for sensor and control system, which automatically adjusts a product splitter position of a full-scale spiral. An electrical conductivity-based automation system is described and claimed herein and has been successfully developed and demonstrated as illustrated herein. The system includes a sensor and a microprocessor based and controlled servo or gear motor that is utilized to adjust the splitter of an operating coal/mineral spiral based on the readings of the sensor. The device as described and claimed herein converts a traditional coal spiral to an automated system for controlling the splitter thereby giving the spiral unit the ability to automatically adjust a key process variable, i.e., its splitter position, in real time as and when the feed coal or other mineral property changes to maintain the performance of the spiral at the optimum level.