Piston position detection device and method for telescopic oil cylinder and construction machinery
A telescopic oil cylinder and piston position technology, which is applied to mechanical equipment, fluid pressure actuation devices, fluid pressure actuation system components, etc., can solve the problems of increasing the cost of piston displacement detection of telescopic oil cylinders, etc.
Active Publication Date: 2018-05-04
ZOOMLION HEAVY IND CO LTD
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Problems solved by technology
[0004] However, the telescopic position of the existing hydraulic cylinder is usually detected by a displacement sensor. Whether it is the above-mentioned cable length sensor or the magnetostrictive sensor, there are maintenance problems, which increases the cost of the piston displacement detection of the telescopic cylinder.
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[0024] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0025] figure 1 It is a schematic structural diagram of a piston position detection device for a telescopic oil cylinder provided by an embodiment of the present invention. Such as figure 1 As shown, an embodiment of the present invention provides a piston position detection device for a telescopic oil cylinder, which includes: a receiving device 10 for receiving instructions for controlling the movement of the cylinder piston in a first direction; and a control device 20 for executing The following operation: according to the instruction for controlling the movement of the oil cylinder piston in the first direction, determine the duration of the movement of t...
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The invention provides a piston position detection device and method for a telescopic oil cylinder and an engineering machine. The piston position detection method for the telescopic oil cylinder includes the steps of receiving commands controlling an oil cylinder piston to move in the first direction; determining the duration time of moving of the cylinder piston in the first direction and a displacement proportionality coefficient related with the movement of the oil cylinder piston in the first direction according to the commands controlling the oil cylinder piston to move in the first direction; determining displacement of the oil cylinder piston in the first direction according to the duration time and the displacement proportionality coefficient; and determining the current position of the oil cylinder piston according to the displacement of the oil cylinder piston in the first direction and the position of the oil cylinder piston before the movement in the first direction. According to the scheme, the piston position can be detected without arranging an additional displacement sensor, the detection cost of the piston position can be greatly saved, and the maintenance problem of mechanical energy of the displacement sensor in the later period can be avoided.
Description
technical field [0001] The invention relates to the technical field of oil cylinders, in particular to a piston position detection device and method of a telescopic oil cylinder and engineering machinery. Background technique [0002] The detection of the piston displacement of the telescopic oil cylinder is a key data, which directly affects the control of the piston of the telescopic oil cylinder and the normal operation of the equipment using the telescopic oil cylinder. In the existing telescopic oil cylinder, the stay wire length sensor is often used as the displacement detection device of the oil cylinder piston, and the piston displacement of the oil cylinder is directly measured by installing the stay wire at both ends of the oil cylinder. The wire length sensor adopts a mechanical interventional measurement method, which is often affected by various external environments such as dust, rain, mechanical collisions, etc., and frequently performs telescopic operations, ...
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IPC IPC(8): F15B21/02
CPCF15B21/02
Inventor 彭志威谭洲洋
Owner ZOOMLION HEAVY IND CO LTD