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公开(公告)号:US06401456B1
公开(公告)日:2002-06-11
申请号:US09485021
申请日:2000-06-08
申请人: Naoyuki Moriya , Hideto Furuta , Nobuaki Matoba
发明人: Naoyuki Moriya , Hideto Furuta , Nobuaki Matoba
IPC分类号: F15B1316
CPC分类号: E02F9/2228 , F15B11/163 , F15B19/002 , F15B21/087 , F15B2211/20546 , F15B2211/20553 , F15B2211/30535 , F15B2211/3054 , F15B2211/3111 , F15B2211/327 , F15B2211/50536 , F15B2211/5157 , F15B2211/6054 , F15B2211/6309 , F15B2211/6313 , F15B2211/6653 , F15B2211/6656 , F15B2211/71
摘要: An electro-hydraulic transducing valve (3a) and other elements associated with cylinder-controlling components, such as a control valve (3), are connected to the output end of a controller (23) adapted to perform control computation based on electric manipulation signals send from and electric joy stick (12a) or the like. Control valve return pressure (PT) and load-sensing pressure (PL) are detected by the first and second detectors (18), (19) so that start-up of a hydraulic cylinder (7) or the like is detected based on rise of the differential pressure (&Dgr;P) between the two types of pressures. The controller (23) is provided with a function generating unit (14a) and a calibration computing unit (20). The function generating unit (14a) has a reference function (F) that determines the relationship between electric manipulation signals and command values for commanding the electro-hydraulic transducing valve (3a) and other similar elements. The calibration computing unit (20) is adapted to correct the reference function (F) by computing the calibration deviation (&Dgr;S) between the actual command value stored at the moment with the cylinder actually started and the provisional command value that corresponds to an imaginary start-up moment of the cylinder and has been set beforehand according to the reference function (F), and adding the calibration (&Dgr;S) to the reference function (F).
摘要翻译: 电动液压换向阀(3a)和与气缸控制部件(例如控制阀(3))相关联的其他元件连接到控制器(23)的输出端,控制器(23)适于基于电操纵信号执行控制计算 发送和电动摇杆(12a)等。 通过第一和第二检测器(18),(19)检测控制阀返回压力(PT)和负载感测压力(PL),从而基于上升来检测液压缸(7)等的启动 的压差(DELTAP)两种压力之间。 控制器(23)具有功能发生单元(14a)和校准计算单元(20)。 功能产生单元(14a)具有确定电动操作信号与用于指示电动液压换向阀(3a)和其他类似元件的指令值之间的关系的参考功能(F)。 校准计算单元(20)适于通过计算在此存储的实际命令值与实际启动的气缸的实际命令值与对应于虚拟起始点的临时命令值之间的校准偏差(DELTAS)来校正参考功能(F) 并且根据参考功能(F)预先设置,并将校准(DELTAS)添加到参考功能(F)。