FAULT DIAGNOSIS SYSTEM OF CONTROL VALVE IN HYDRAULIC CIRCUIT

• Main Authors: MATTHEW JAMES BESCHORNER, FUNABIKI NAOTO
• Format: Patent
• Language: English; Japanese
• Published: 28.04.2016
• Subjects: BLASTING; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; DREDGING; FIXED CONSTRUCTIONS; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; FOUNDATIONS; HEATING; HYDRAULIC ENGINEERING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; SOIL SHIFTING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To easily specify a broken control valve in a case where a control valve is broken, even in a hydraulic circuit where many control valves are provided.SOLUTION: A fault diagnosis system of a control value in a hydraulic circuit includes: fault diagnosis execution means 47 of setting a plurality of test patterns in which two or more control valves among a plurality of control valves 25, 26, 27, 29, 32, 33 are combined as a diagnosis object, and executing fault diagnosis with each test pattern as a unit; and fault valve specification means 48 of collating control valves with each other contained a test pattern in which the presence/absence of a fault is diagnosed by the fault diagnosis execution means 47 thereby to specify a broken control valve.SELECTED DRAWING: Figure 2 【課題】多数の制御バルブが設けられている油圧回路であっても、制御バルブが故障した場合に、該故障した制御バルブの特定を容易に行えるようにする。【解決手段】複数の制御バルブ２５，２６，２７，２９，３２，３３のうち２つ以上の制御バルブを診断対象として組合わせた複数のテストパターンを設定すると共に、各テストパターンを単位とする故障診断を実行する故障診断実行手段４７と、該故障診断実行手段４７により故障の有無が診断されたテストパターンに含まれる制御バルブ同士の照合をして故障した制御バルブを特定する故障バルブ特定手段４８とを設けた。【選択図】図２