Oil cylinder stroke detection and control method based on hydraulic oil volume flow

Abstract

The invention discloses an oil cylinder stroke detection and control method based on hydraulic oil volume flow. The oil cylinder stroke detection and control method is characterized by comprising thefollowing steps that the volume change amount and the flow direction of the hydraulic oil in the oil cylinder are calculated by adopting a volumetric flow meter; the leakage coefficient is considered,according to the volume change amount of the hydraulic oil in the oil cylinder, the flow direction and the sectional area of the cylinder barrel, an oil cylinder stroke calculation value expression is obtained; the actual stroke value of each time of the oil cylinder is measured and recorded manually, the obtained oil cylinder stroke calculation value is combined, the final oil cylinder stroke detection value expression is determined through linear regression, and the absolute zero point and the full stroke position of the stroke are calibrated according to the proximity switch signal; the travel controller module is used for realizing collection, parameter setting, operational processing, display and control output of the volumetric flow meter and the proximity switch signal, and the oilcylinder stroke is accurately detected and positioned; the oil cylinder, the flow meter and the travel controller module are designed into an integrated device. The oil cylinder stroke detection andcontrol method is compact in structure, is not influenced by the stroke of an oil cylinder and is low in cost, does not need special machining of the oil cylinder body, and is easy to realize.

Description

Technical field: [0001] The invention relates to a hydraulic oil cylinder stroke detection and control method based on hydraulic oil volume flow, and belongs to the technical field of hydraulic cylinder stroke detection and positioning control. Background technique: [0002] At present, the detection methods of hydraulic cylinder stroke can be divided into external type and built-in type. Most of the external methods use rope-type displacement sensors, which are characterized by compact structure, long measurement stroke, low cost, and easy control program. There are high requirements on the angle, parallelism and cleanliness of the external environment, otherwise the service life will be affected. Most of the built-in methods use magnetostrictive displacement sensors, which are characterized by high detection accuracy and high response frequency, suitable for high-precision and high-speed detection occasions. The disadvantage is that the structure is more complicated, and h...

AI Technical Summary

Problems solved by technology

However, due to factors such as cylinder oil leakage, detection error, and calculation conversion error, the measurement accuracy of this method will be affected. Therefore, it is necessary to improve the method of indirectly calculating the piston rod extension stroke by using the hydraulic oil volume flow rate to improve the measurement accuracy. Accuracy; at the same time, with the development of oil cylinders towards digitization and integration, it is necessary to study the integration and modular design of oil cylinders, stroke detection and control devices

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