Abstract: A pipe electrochemical polishing system (10, 10a) for in place polishing of a pipe (28(has provision for detecting the instant position of a cathode (14) within the pipe (28) such as cable marks (52) and cable mark sensor (50), an infrared camera (60), heat sensing crayon marks (64), thermisters (66), and capacitance sensors (68), used individually or in combination. According to the inventive in place electropolishing method (80) when it is determined that the cathode is in a non horizontal portion (72) of the pipe (28) and further is presently traveling generally downward, then the direction of flow of the electrolyte (24) is reversed to carry any bubbles in the electrolyte (24) away from the area of the cathode (14).

Abstract: A pipe electrochemical polishing system (10, 10a) for in place polishing of a pipe (28) has provision for detecting the instant position of a cathode (14) within the pipe (28) such as cable marks (52) and cable mark sensor (50), an infrared camera (60), heat sensing crayon marks (64), thermisters (66), and capacitance sensors (68), used individually or in combination. According to the inventive in place electropolishing method (80) when it is determined that the cathode is in a non horizontal portion (72) of the pipe (28) and further is presently traveling generally downward, then the direction of flow of the electrolyte (24) is reversed to carry any bubbles in the electrolyte (24) away from the area of the cathode (14).

Abstract: An automatic control system, having a main control system with wireless communication equipment, with a water sprinkling device disposed in an area to be sprinkled with water and adapted to sprinkle water over this area, and water piping installed between a water source and the water sprinkling device, and adapted to distribute water from the water source to the water sprinkling device. A water sprinkling control system is installed on the ground in a position close to the water sprinkling device and adapted to control the water sprinkling device. The water sprinkling control system includes a hydraulic valve disposed in the water piping close to the sprinkling device which has a water channel connecting an inflow passageway with a flow passageway connected to a pilot line. A two-way pilot solenoid valve is connected at one port thereof to the hydraulic valve through the pilot line, and at the other port to a drain piping.