Absolute type ceramic piston rod displacement sensor and measuring method thereof
A technology of displacement sensor and piston rod, which is applied in the direction of fluid pressure actuation device, etc., can solve the problems of large error, inconvenient maintenance, wear of waveguide, etc., and achieve the effect of absolute position measurement
Pending Publication Date: 2018-04-13
WUHAN JINGCISHAN MECHANICAL & ELECTRICAL MFG
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Problems solved by technology
Although this type of sensor can obtain higher precision, the longer the detection length is, the greater the error will be. At present, the range is mostly within 5 meters, and the long stroke also limits the working state of the hydraulic cylinder. When the hydraulic cylinder is in a horizontal state, it will cause waveguide The tube is worn due to deflection and bending, which shortens the service life of the sensor and is inconvenient for later maintenance
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[0023] The structural schematic diagram of the absolute ceramic piston rod displacement sensor of the present invention is as follows figure 1 As shown, the ceramic piston rod displacement sensor of the present invention includes a cylinder 1, a detection head 3, a ceramic piston rod 2 formed by coating a ceramic layer on the outside of the metal rod body; Annular grooves 6, the combination of these annular grooves 6 contains binary absolute position information. All annular grooves 6 are covered and filled with ceramic layers, and the grooves are flush with the surface of the ceramic layer at the place without grooves 7, so that the appearance of the ceramic piston rod 2 is the same as that of ordinary piston rods; the detection head 3 is installed and fixed on The joint between the cylinder barrel 1 and the ceramic piston rod 2 is at a certain distance from the surface of the ceramic piston rod 2 . The detection head 3 includes the core detection component TMR array module ...
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The invention discloses an absolute type ceramic piston rod displacement sensor. The absolute type ceramic piston rod displacement sensor comprises a cylinder barrel, a piston rod and a detection head; annular grooves with equal width, equal depth and unequal distance are formed in a metal rod body of the piston rod; the annular grooves and groove-free parts among the annular grooves are arrangedat intervals and are tightly combined to form absolute coding position information; the detection head is fixedly arranged at the joint of the cylinder barrel and the piston rod, and the detection head and the piston rod are arranged at intervals; and a giant magnetic resistor array module is arranged in the detection head and is configured to be used for detecting the radial arrangement of the grooves in the piston rod so as to obtain the absolute coding position information in the moving process of the piston rod. The absolute type ceramic piston rod displacement sensor has the advantagesthat absolute position measurement can be achieved, and power failure can be avoided; the coding distance is ultra-long, and the absolute type ceramic piston rod displacement sensor is suitable for measuring the stroke of hydraulic cylinders with various ranges; non-contact measurement can be achieved, and the abrasion can be avoided; and the absolute type ceramic piston rod displacement sensor can be widely applied to the field with hydraulic cylinders required to be used such as water conservancy and hydropower, industrial machinery, transportation, environment protection and military equipment.
Description
technical field [0001] The invention relates to a novel absolute ceramic piston rod displacement sensor and a measuring method thereof, belonging to a novel measuring method for non-contact hydraulic cylinder stroke detection in the technical field of instruments and meters. Background technique [0002] In the modern water conservancy and hydropower industry, the opening and closing of gates are mostly driven by hydraulic cylinders. People need to know the opening state of the gate at any time, so a stroke detection device is installed on the hydraulic cylinder to detect the stroke of the piston rod, thereby detecting the value of the gate opening. At present, there are many kinds of displacement sensor devices commonly used to measure the opening of the gate, which can be roughly divided into three types: wire rope rotary encoder, black ceramic piston rod plus CIMS stroke detection, and magnetostrictive displacement sensor. [0003] Wire rope rotary encoder is the earlies...
Claims
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IPC IPC(8): F15B15/28
CPCF15B15/2861
Inventor 徐传仁周金波陈彬王汉兵杨艳娟桂昆伟
Owner WUHAN JINGCISHAN MECHANICAL & ELECTRICAL MFG