Device for detecting absolute displacement of ceramic piston rod
A technology of absolute displacement and detection device, which is applied in the direction of fluid pressure actuation device, etc., can solve the problems of increasing the amount of ceramic spraying materials, affecting the adhesion of ceramic coating, and large cutting amount of piston rod substrate, so as to achieve simple and convenient implementation of the device. The effect of saving consumption and reducing the amount of cutting
Active Publication Date: 2011-08-03
JIANGSU WUJIN HYDRAULIC HOIST
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Problems solved by technology
Compared with the first two methods, this detection device has made great progress in technology, but it has the following disadvantages: special equipment must be used for the groove processing of the piston rod base, and the cutting amount of the piston rod base is relatively large. , has an impact on the strength of the piston rod. More and deeper grooves on the surface of the piston rod base increase the amount of ceramic spraying materials and affect the adhesion of the ceramic coating.
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[0011] A device for detecting the absolute displacement of a ceramic piston rod, comprising a ceramic piston rod and a sensor mounting seat 2 which is set close to the surface of the ceramic piston rod and is stationary relative to the ceramic piston rod, and a linear array sensor 3 is installed in the sensor mounting seat 2. There are at least two sets of thread grooves 1-1 with the same starting point in the surface processing of the base body, the pitch value of the set of thread grooves 1-1 with the smallest pitch is the reference value, and the pitch value of the other thread grooves 1-1 is twice the value of the reference value Values within the range, the effective detection length value of the line array sensor 3 is greater than twice the pitch reference value of the thread groove 1-1. The ultrasonic phased array probe is applied to the linear array sensor 3. The characteristics that can be achieved by the ultrasonic phased array probe at present: the working frequenc...
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The invention relates to the technical field of stroke detection, in particular to a device for detecting the absolute displacement of a ceramic piston rod. The device comprises a ceramic piston rod and a sensor mounting base which is arranged close to the surface of the ceramic piston rod and is static relative to the ceramic piston rod; a linear array sensor is arranged in the sensor mounting seat; at least two sets of thread grooves with the same starting points are processed on the surface of a piston rod substrate, wherein a thread pitch value of one set of thread groove of which a thread pitch is the minimum is taken as a reference value; the thread pitch values of other thread grooves are numerical values in the range of the number which is two times the reference value; and the effective detection length value of the linear array sensor is more than two times the reference value of the thread pitch of the thread groove. Compared with the conventional related detection device, the device for detecting the absolute displacement of the ceramic piston rod has the advantages of simple and convenient implementation process, easy maintenance, small influence on equipment, large detection threshold value and high accuracy.
Description
technical field [0001] The invention relates to the technical field of stroke detection, in particular to a ceramic piston rod absolute displacement detection device. Background technique [0002] At present, the built-in stroke detection devices used in hydraulic cylinders generally have the following types: one is a magnetic linear displacement sensor, the longest detection length does not exceed 6000mm, and when the hydraulic cylinder is arranged in an inclined or horizontal form, the sensor is There will be a certain degree of free deflection, which will directly affect the accuracy of stroke detection; in addition, it must and can only be installed on the top of the upper cover of the hydraulic cylinder, and a long hole for installing a linear displacement sensor must also be left in the middle of the piston rod. In view of the above factors, the application range of this magnetic linear displacement sensor is relatively limited. The other is a wire rope built-in trave...
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Inventor吴国栋高吉元朱琴玉彭哲凯王双云
OwnerJIANGSU WUJIN HYDRAULIC HOIST