Device and method for on-line vibration measurement of capacitive tube/rod-shaped object
A technology of measuring device and measuring method, which is applied in the direction of measuring device, adopting electric device, measuring ultrasonic/sonic wave/infrasonic wave, etc. It can solve the problems of low measurement accuracy, inaccurate sensor readings, poor anti-disturbance ability, etc., and achieve simple operation , high precision, less process effect
Active Publication Date: 2019-02-01
善测(天津)科技有限公司
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Problems solved by technology
However, in the vibration measurement of tube (rod)-shaped objects, due to the curvature of the metal surface of the tube (rod), it is difficult to fix the traditional capacitive sensor on the cylindrical surface, and the flat electrode does not match the metal arc surface to be tested. The readings of the direction sensor are inaccurate, resulting in low measurement accuracy and poor anti-disturbance ability
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[0027] The technical solution adopted in the present invention is a new capacitive on-line measurement device for the vibration of a tube (rod)-shaped object, which is mainly composed of the following parts:
[0028] Surface-mounted arc-shaped capacitive sensor, including inner-ring capacitance measuring electrodes, middle-ring metal shielding layer, and outer ring grounding protection layer; a special measurement structure adapted to the outer diameter of the tube (rod) to be measured, of which the three-electrode measurement structure is Semi-circular fixed seat, three surface-mounted arc-shaped capacitive sensors are attached to the inner side of the fixed seat at 90 degrees on both sides and in the middle, and the four-electrode measurement structure is a matching semi-circular fixed seat and semi-circular movable seat, four The surface-mounted arc-shaped capacitive sensor is attached to the inner side of the fixed seat at a symmetrical angle of 90 degrees; the coaxial cabl...
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The invention belongs to the vibration measuring field, and the object of the invention is to realize the accurate on-line measurement of the vibration of the cross section of the tube(rod)-shaped object on the metal surface, and then the precision and the reliability of the measurement can be improved. The invention discloses a capacitive tube / rod-shaped object vibration on-line measuring device and a capacitive tube / rod-shaped object vibration on-line measuring method. Each of three surface-mount arc capacitive sensors comprises an inner ring capacitive measuring electrode, a middle ring metal shielding layer, and an outer ring grounding protection layer. Special measuring structures cooperated with the outer diameter of the tube or the rod to be measured are provided, and the three-electrode special measuring structure is a half-ring fixing seat. The three surface-mount arc capacitive sensors are respectively disposed on the two sides and the middle part of the inner side of the fixing seat in an attached manner, and are respectively separated by 90degrees. The four-electrode special measuring structure is the half ring fixing seat and the half ring movable seat, which are cooperated with each other, and are in a butt joint, and four surface-mount arc capacitive sensors are separated by 90degrees, are arranged at symmetrical angles, and are disposed on the inner side of the fixing seat in an attached manner. The output of the surface-mount arc capacitive sensors can be realized by the coaxial cable signal transmission line. The capacitive tube / rod-shaped object vibration on-line measuring device and the capacitive tube / rod-shaped object vibration on-line measuring method are mainly used for the vibration measurement.
Description
technical field [0001] The invention belongs to the field of vibration measurement, in particular to a novel capacitive on-line vibration measurement device and method for a tube (rod)-shaped object. Background technique [0002] Capacitance measurement of vibration is a research hotspot in the field of vibration analysis in recent years. Its principle is to use the change in the distance between the metal surface of the measured object and the measurement electrode layer caused by vibration to convert it into a change in capacitance voltage, and obtain the vibration displacement value by measuring the voltage value. It has the advantages of fast dynamic response, good temperature stability, large measurement range and high precision. However, in the vibration measurement of tube (rod)-shaped objects, due to the curvature of the metal surface of the tube (rod), it is difficult to fix the traditional capacitive sensor on the cylindrical surface, and the flat electrode does no...
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IPC IPC(8): G01H11/06
CPCG01H11/06
Inventor 段发阶傅骁蒋佳佳吕昌荣黄婷婷李洋梁春疆
Owner 善测(天津)科技有限公司