The High-Resolution Camera in Estimation of the Position of the Hydraulic Valve Spool

Owczarek, Piotr; Rybarczyk, Dominik; Gośliński, Jarosław; Owczarkowski, Adam

doi:10.1007/978-3-319-05353-0_59

Cited by 2 publications

(4 citation statements)

References 3 publications

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“…The screw and the movable nut form a screw-nut gear mechanism that converts the rotary motion of the motor shaft into the linear motion of the spool. Subsequently, Rybarczyk D et al [90][91][92] proposed two schemes for spool drive, one of which was to replace one DC motor and one stepper motor drive method with two stepper motors, and the other was to use a permanent magnet synchronous motor to drive the spool [10,93,94]. Li S et al [95] used a two-phase hybrid stepper motor as an electro-mechanical converter to drive a 2D digital servo valve.…”

Section: Stepper Motor Drivementioning

confidence: 99%

Review of Recent Advances in the Drive Method of Hydraulic Control Valve

Li,

Yang

et al. 2023

Processes

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Hydraulic control valves are widely used in industrial production, agricultural equipment, construction machinery, and other large power equipment for controlling the pressure and flow of fluids in hydraulic systems. The driving method has a significant impact on the response and control accuracy of hydraulic valves. This paper reviews the driving methods of spools from five aspects: solenoid drive, material expansion drive, motor drive, hydraulic valve drive, and another drive. It summarizes the various schemes currently available for spool drive and analyzes each of them. After optimizing the driving method of the valve core, the control accuracy can reach 3%, and the minimum response time is 7 ms. According to the characteristics of the different drive methods, the differences between them are compared, the advantages and disadvantages of each drive method are analyzed, and the application scenarios for each drive method are identified. Solutions to the drawbacks of the existing drive methods are proposed, which provide directions for further optimization. We have found that solenoid drives are simple to control, low cost, and the most widely used. Material telescopic drives, motor drives, hydraulic valve drives, and other drives are costly, complex to control, and optional for use in special requirement situations. Based on the existing spool drive methods, an outlook on future drive methods is presented. This review facilitates a comprehensive understanding of the drive methods of hydraulic valve spools, points out the shortcomings of the existing drive methods, and is of great significance in improving the existing drive methods and proposing new drive methods. This paper has a positive effect on improving the control accuracy and responsiveness of hydraulic valves.

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Section: Stepper Motor Drivementioning

confidence: 99%

Review of Recent Advances in the Drive Method of Hydraulic Control Valve

Li,

Yang

et al. 2023

Processes

View full text Add to dashboard Cite

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“…The driving motor (1), the circular-grating angle encoder (10), the reducer (12) and the center (2) move along the Y-axis together with the slide guide (11). Moreover, the dead center (7) can move along the Y-axis. The two centers of the axes mentioned, which are employed to clamp the hydraulic valve, are collinear, so the hydraulic valve is capable of rotating around the Yaxis.…”

Section: Instrument Structural Design and Measurement Principlesmentioning

confidence: 99%

“…The variables k in equation (7) and k in equation ( 13) have identical meanings. The valve part is measured n times; each time, the angle is increased by 2π n around the 0 axis, and the n installation measurements are evenly distributed.…”

Section: Eccentricity Error Correctionmentioning

confidence: 99%

“…Pan et al proposed a method based on differential-pressure pneumatic measurement, which was exploited to measure the orificeedge axial runout of the valve spool and the valve sleeve [6]. Owczarek et al reported that a vision system can be employed to measure the positions of actuators in any hydraulic device [7]. Wang et al aimed to solve the problem of high-precision detection of a cylindrical object's diameter by machine vision; their experimental results suggested that their method, based on machine vision, was capable of achieving high-precision measurement of the diameter of cylindrical machinery parts [8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study of a measurement system and a method for determining the distance between the grooves of a hydraulic valve

Huang¹,

Long²,

Gan³

et al. 2021

Meas. Sci. Technol.

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Hydraulic valves are critical control components of hydraulic systems. To ensure hydraulic control systems are accurate, the distance between the grooves of hydraulic valves should be measured. This distance critically impacts how much oil is fed. In previous measurements, a coordinate-measuring machine or a universal tool microscope were applied. However, these two methods exhibited low measuring precision in terms of center eccentricity, incorrect initial position, boresight error, etc. In the present study, a high-precision non-contact automatic instrument is developed that solves chord length and uses a machine-vision technique to determine distance. Besides, an angle-compensation method is proposed to remedy the boresight error attributed to motion control in a closed-loop system. Moreover, an eccentricity-correction method is put forward to correct the angular error attributed to the eccentricity of the measurement system, enhancing measurement precision. As revealed by the experimental results, the maximum limit error of a single measurement is less than 3.3 μ m , verifying the feasibility of the novel instrument.

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The High-Resolution Camera in Estimation of the Position of the Hydraulic Valve Spool

Cited by 2 publications

References 3 publications

Review of Recent Advances in the Drive Method of Hydraulic Control Valve

Review of Recent Advances in the Drive Method of Hydraulic Control Valve

Study of a measurement system and a method for determining the distance between the grooves of a hydraulic valve

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