CN105444876A - Multi-point tube/rod-shaped object cross section vibration on-line measuring method and device - Google Patents

Abstract

The invention discloses a multi-point tube/rod-shaped object vibration measuring device having advantages of high precision, low costs, and easy operation, and belongs to the vibration measuring field. The device is cooperated with various non-contact sensors such as capacitors, laser, visual sense, and eddy current, and then the on-line measurement and evaluation of the tube(rod)-shaped object cross section vibration condition can be realized. The problem of the conventional contact-type measuring devices such as clamping difficulty and easy loss can be solved. The multi-point tube/rod-shaped object cross section vibration on-line measuring method and the multi-point tube/rod-shaped object cross section vibration on-line measuring device are characterized in that a half ring measuring fixing seat cooperated with an outer diameter of a tube-shaped object to be measured is provided; a left measuring sensor, a right measuring sensor, and a middle measuring sensor are inserted in corresponding sensor positioning holes of the half ring measuring fixing seat, and then can be locked in the sensor positioning holes by fastening screws; the sensor signals can be output by a cable; a clamping support having multi-degree of freedom is connected with the half ring measuring fixing seat by a support fixing screwed hole, and then the position of the above mentioned clamping support is fixed by a pedestal. The multi-point tube/rod-shaped object cross section vibration on-line measuring method and the multi-point tube/rod-shaped object cross section vibration on-line measuring device are mainly used for the cross section vibration measurement.

Description

Multipoint mode pipe rod-like articles cross section vibration On-line Measuring Method and device

Technical field

The invention belongs to vibration survey field, specifically, relate to multipoint mode pipe rod-like articles cross section vibration On-line Measuring Method and device.

Background technology

It is also that vibration displacement is measured the most intuitively that pipe (bar) shape object vibration detects most important, and at present, traditional contact measuring apparatus is mainly according to acceleration analysis method and strain measurement method.Acceleration analysis method is fixed on a certain position for the treatment of test tube (bar) by acceleration transducer by mode that is bonding or binding, the acceleration that measuring tube (bar) vibrates, vibration displacement is obtained after quadratic integral, the method affects seriously by low-frequency noise cumulative errors, quadratic integral process is complicated, and temperature is higher when much pipe (bar) works, general bonding agent melted by heat cannot use, sensor and the fixing difficulty of pipe (bar); Strain measurement method is fixed on a certain position of pipe (bar) by the mode of bonding by foil gauge, the strain produced when measuring tube (bar) vibrates, vibration displacement is obtained through conversion, the method simple, intuitive, but because pipe (bar) may exist bending, strain all variant when vibrating under different frequency everywhere, foil gauge fixed position is difficult to determine, and temperature compensation difficult.In addition, for industry spot batch detection environment, all there is the difficulty that is installed, easily consume, problem that precision is low in above-mentioned vibration measurement device and method.

Summary of the invention

For overcoming the deficiencies in the prior art, a kind of 3 or four-point pipe (bar) shape object section vibration on-line measurement device are provided, the multiple non-contacting sensors such as electric capacity, laser, vision, current vortex can be coordinated, for realizing on-line measurement and the assessment of managing (bar) shape object section Vibration Condition.Solve existing conventional contact measurement mechanism to be installed the problems such as difficulty, easily consume, a kind of high precision, low cost, easy-operating tubular articles vibration measurement device are provided, can promote for pipe (bar) the shape object section vibration detection under the multiple occasion of industry spot.For this reason, the technical scheme that the present invention takes is, multipoint mode pipe rod-like articles cross section vibration on-line measurement device, structure is, holder is measured with the semi-circular of tubular articles external diameter adaptation to be measured, left and right, middle survey sensor inserts semi-circular and measures in the respective sensor pilot hole of holder, and be locked in sensor localization hole by holding screw, sensor signal exports through cable, multiple degrees of freedom clamp bracket is measured holder by support fixing threaded hole with semi-circular and is connected, and multiple degrees of freedom clamp bracket is carried out position by its base and fixed.

With semi-circular holder and the semi-circular sliding seat for the treatment of test tube or bar external diameter adaptation, four symmetrical sensors; Inserted by three sensors in sensor localization hole corresponding to semi-circular holder, a sensor inserts in sensor localization hole corresponding to another semi-circular sliding seat, by the holding screw locking above holder, sliding seat; The rotating hole of semi-circular holder and the corresponding side of semi-circular sliding seat is aimed at, by the turning axle fixed screw below holder through locking, semi-circular sliding seat can be pivoted; The support fixed orifice of cradling piece by semi-circular holder is installed; Rotate semi-circular sliding seat, make it fully open laterally, move support and make measurement mechanism near pipe under test, be substantially in the center of semi-circular holder, measurement mechanism with treat that test tube or bar do not contact; Rotate semi-circular sliding seat, make it close to the inside extremely, dock with semi-circular holder, by connecting screw through butt hole locking, now, treat that test tube or bar are in annular measurement mechanism center.

Multipoint mode pipe rod-like articles cross section vibration On-line Measuring Method, semi-circular with tubular articles external diameter adaptation to be measured is measured holder, left and right, middle survey sensor inserts semi-circular and measures in the respective sensor pilot hole of holder, and be locked in sensor localization hole by holding screw, sensor signal exports through cable, multiple degrees of freedom clamp bracket is measured holder by support fixing threaded hole with semi-circular and is connected, multiple degrees of freedom clamp bracket is carried out position by its base and is fixed, check that each several part is fixing can rearward, start to measure;

Intermediate sensor direction of measurement is X, vibration displacement measured value is Δ x1, two, both sides sensor forms symmetry, orthogonal with intermediate sensor, and direction of measurement is Y, vibration displacement measured value is respectively Δ y1 and Δ y2, when pipe or bar vibration, the oscillating component being located at X-direction in cross section is Δ x, and oscillating component is in the Y direction Δ y, vibration total displacement is Δ L, then have

$\mathrm{\Δ}x=\mathrm{\Δ}x1,\mathrm{\Δ}y=\frac{\mathrm{\Δ}y1+\mathrm{\Δ}y2}{2},\mathrm{\Δ}L=\sqrt{{\mathrm{\Δx}}^2+{\mathrm{\Δy}}^2}.$

In addition, also can increase a sensor again and insert in sensor localization hole corresponding to another semi-circular sliding seat, four sensors are symmetrical in pipe or bar cross section, two one group forms two groups of orthogonal measurement directions X and Y, and vibration displacement measured value is respectively Δ x1 and Δ x2, Δ y1 and Δ y2, when pipe or bar vibration, the oscillating component being located at X-direction is Δ x, oscillating component is in the Y direction Δ y, and vibration total displacement is Δ L, then have

$\mathrm{\Δ}x=\frac{\mathrm{\Δ}x1+\mathrm{\Δ}x2}{2},\mathrm{\Δ}y=\frac{\mathrm{\Δ}y1+\mathrm{\Δ}y2}{2},\mathrm{\Δ}L=\sqrt{{\mathrm{\Δx}}^2+{\mathrm{\Δy}}^2}.$

Feature of the present invention and beneficial effect are:

The invention provides a kind of or four-point pipe (bar) shape object section vibration on-line measurement device at 3, the multiple non-contacting sensors such as electric capacity, laser, vision, current vortex can be coordinated, adopt or four-point structure measurement to treat that test tube (bar) is vibrated at 3, existing conventional contact measurement mechanism can be solved and to be installed the problems such as difficulty, easily consume, precision are low; The advantage of bikini structure is, structure is simple, simple operation, with low cost; The advantage of four-point structure is, compares bikini structure, and either party, can by least two sensor measurements to vibrating in two dimensional surface no matter to manage (bar), measuring accuracy and reliability higher.

Accompanying drawing illustrates:

Fig. 1 is the wiring layout of bikini pipe (bar) shape object section vibration detection on-line measurement device of the present invention.

Fig. 2 is the wiring layout of four-point pipe (bar) shape object section vibration detection on-line measurement device of the present invention.

Fig. 3 utilizes bikini measurement mechanism of the present invention measurement to treat the principle schematic that test tube (bar) cross section vibrates.

Fig. 4 utilizes four-point measurement mechanism of the present invention measurement to treat the principle schematic that test tube (bar) cross section vibrates.

In Fig. 1: 1 is semi-circular measurement holder; 2,3,4 is survey sensor; 5 is holding screw; 6 is support fixing threaded hole; 7 is sensor localization hole.

In Fig. 2: 10 is semi-circular holder; 11,12,13,14 is survey sensor; 15,16,17,18 is corresponding sensor localization hole; 19 is holding screw; 20 is semi-circular sliding seat; 21 is turning axle fixed screw; 22 is butt hole; 23 is connecting screw; 24 is support fixed orifice.

In Fig. 3: 25 for treating test tube (bar); 26 is the measurement mechanism after assembling; 27 is support.

In Fig. 4: 28 for treating test tube (bar); 29 is the measurement mechanism after assembling; 30 is support.

Embodiment

The technical solution used in the present invention is, a kind of 3 or four-point pipe (bar) shape object section vibration on-line measurement device:

Bikini measurement mechanism as shown in Figure 1, holder is measured with the semi-circular of tubular articles external diameter adaptation to be measured, left and right, middle survey sensor inserts semi-circular and measures in the respective sensor pilot hole of holder, and be locked in sensor localization hole by holding screw, sensor signal imports computer disposal into through cable, multiple degrees of freedom clamp bracket is measured holder by support fixing threaded hole with semi-circular and is connected, and checking that each several part is fixing can rearward, start to measure.

Four-point measurement mechanism as shown in Figure 2, with semi-circular holder and the semi-circular sliding seat for the treatment of test tube (bar) external diameter adaptation, four symmetrical sensors; Inserted by three sensors in sensor localization hole corresponding to semi-circular holder, a sensor inserts in sensor localization hole corresponding to semi-circular sliding seat, by the holding screw locking above holder, sliding seat; The rotating hole of semi-circular holder and the corresponding side of semi-circular sliding seat is aimed at, by the turning axle fixed screw below holder through locking, semi-circular sliding seat can be pivoted; The support fixed orifice of cradling piece by semi-circular holder is installed; Rotate semi-circular sliding seat, make it fully open laterally, move support and make measurement mechanism near pipe under test, be substantially in the center of semi-circular holder, measurement mechanism with treat that test tube (bar) does not contact; Rotate semi-circular sliding seat, make it close to the inside extremely, dock with semi-circular holder, by connecting screw through butt hole locking, now, treat that test tube (bar) is in annular measurement mechanism center, checking that each several part is fixing can rearward, start to measure.

For bikini pipe (bar) shape object section vibration on-line measurement device, structure is relatively simple, and intermediate sensor direction of measurement is X, vibration displacement measured value is Δ x1, two, both sides sensor forms symmetry, orthogonal with intermediate sensor, and direction of measurement is Y, vibration displacement measured value is respectively Δ y1 and Δ y2, when pipe (bar) vibrates, the oscillating component being located at X-direction in cross section is Δ x, and oscillating component is in the Y direction Δ y, vibration total displacement is Δ L, then have

$\mathrm{\Δ}x=\mathrm{\Δ}x1,\mathrm{\Δ}y=\frac{\mathrm{\Δ}y1+\mathrm{\Δ}y2}{2},\mathrm{\Δ}L=\sqrt{{\mathrm{\Δx}}^2+{\mathrm{\Δy}}^2}$

For four-point pipe (bar) shape object section vibration on-line measurement device, structure relative complex, four sensors are symmetrical in pipe (bar) cross section, two one group forms two groups of orthogonal measurement directions X and Y, and vibration displacement measured value is respectively Δ x1 and Δ x2, Δ y1 and Δ y2, when pipe (bar) vibrates, the oscillating component being located at X-direction is Δ x, oscillating component is in the Y direction Δ y, and vibration total displacement is Δ L, then have

$\mathrm{\Δ}x=\frac{\mathrm{\Δ}x1+\mathrm{\Δ}x2}{2},\mathrm{\Δ}y=\frac{\mathrm{\Δ}y1+\mathrm{\Δ}y2}{2},\mathrm{\Δ}L=\sqrt{{\mathrm{\Δx}}^2+{\mathrm{\Δy}}^2}$

Compare conventional contact vibration measurement device, 3 or four-point structure disclosed by the invention have that precision is high, reliability strong, the feature of convenient mounting and clamping, not easily loss; The advantage of bikini structure is, structure is simple, simple operation, with low cost; The advantage of four-point structure is, compares bikini structure, and either party, can by least two sensor measurements to vibrating in two dimensional surface no matter to manage (bar), measuring accuracy and reliability higher.

The present invention is further described below in conjunction with the drawings and specific embodiments.

The technical solution used in the present invention is, a kind of 3 or four-point pipe (bar) shape object section vibration on-line measurement device:

Bikini measurement mechanism as shown in Figure 1, holder 1 is measured with the semi-circular of tubular articles external diameter adaptation to be measured, survey sensor 2, 3, 4 insert the respective sensor pilot hole 5 that semi-circular measures holder, 6, in 7, and locked by holding screw 8, as Fig. 3, cradling piece 27 is measured holder 1 by support fixing threaded hole 9 and semi-circular and is connected, moving support makes bikini measurement mechanism 26 near treating test tube (bar) 25, substantially the center of semi-circular holder 1 is in, measurement mechanism 26 with treat that test tube (bar) 25 does not contact, inspection each several part is fixing can be rearward, start to measure.

Four-point measurement mechanism as shown in Figure 2, with semi-circular holder 10 and semi-circular sliding seat 20, four symmetrical sensors 11,12,13,14 for the treatment of test tube (bar) external diameter adaptation; Three sensors 11,13,14 are inserted in the sensor localization hole 15,17,18 of semi-circular holder 10 correspondence, a sensor 12 inserts in the sensor localization hole 16 of semi-circular sliding seat 20 correspondence, is locked by the holding screw 19 above holder 10, sliding seat 20; The rotating hole of semi-circular holder 10 and the corresponding side of semi-circular sliding seat 20 is aimed at, by the turning axle fixed screw 21 below holder 10 through locking, semi-circular sliding seat 20 can be pivoted; As shown in Figure 4, the support fixed orifice 24 of cradling piece 30 by semi-circular holder 10 is installed; Rotate semi-circular sliding seat 20, it is made fully to open laterally, moving support makes four-point measurement mechanism 29 near treating test tube (bar) 28, is substantially in the center of semi-circular holder 10, measurement mechanism 29 with treat that test tube (bar) 28 does not contact; Rotate semi-circular sliding seat 20, make it close to the inside extremely, dock with semi-circular holder 10, locked through butt hole 22 by connecting screw 23, now, treat that test tube (bar) 28 is in the center of four-point measurement mechanism 29, check that each several part is fixing can rearward, start to measure.

For bikini pipe (bar) shape object section vibration on-line measurement device 26, structure is relatively simple, and intermediate sensor direction of measurement is X, vibration displacement measured value is Δ x1, two, both sides sensor forms symmetry, orthogonal with intermediate sensor, and direction of measurement is Y, vibration displacement measured value is respectively Δ y1 and Δ y2, when pipe (bar) vibrates, the oscillating component being located at X-direction in cross section is Δ x, and oscillating component is in the Y direction Δ y, vibration total displacement is Δ L, then have

$\mathrm{\Δ}x=\mathrm{\Δ}x1,\mathrm{\Δ}y=\frac{\mathrm{\Δ}y1+\mathrm{\Δ}y2}{2},\mathrm{\Δ}L=\sqrt{{\mathrm{\Δx}}^2+{\mathrm{\Δy}}^2}$

For four-point pipe (bar) shape object section vibration on-line measurement device 29, structure relative complex, four sensors are symmetrical in pipe (bar) cross section, two one group forms two groups of orthogonal measurement directions X and Y, and vibration displacement measured value is respectively Δ x1 and Δ x2, Δ y1 and Δ y2, when pipe (bar) vibrates, the oscillating component being located at X-direction is Δ x, oscillating component is in the Y direction Δ y, and vibration total displacement is Δ L, then have

$\mathrm{\Δ}x=\frac{\mathrm{\Δ}x1+\mathrm{\Δ}x2}{2},\mathrm{\Δ}y=\frac{\mathrm{\Δ}y1+\mathrm{\Δ}y2}{2},\mathrm{\Δ}L=\sqrt{{\mathrm{\Δx}}^2+{\mathrm{\Δy}}^2}$

Compare conventional contact vibration measurement device, 3 or four-point structure disclosed by the invention have that precision is high, reliability strong, the feature of convenient mounting and clamping, not easily loss; The advantage of bikini structure is, structure is simple, simple operation, with low cost; The advantage of four-point structure is, compares bikini structure, and either party, can by least two sensor measurements to vibrating in two dimensional surface no matter to manage (bar), measuring accuracy and reliability higher.

Claims (4)

1. a multipoint mode Guan rod-like articles cross section vibration on-line measurement device, it is characterized in that, structure is, holder is measured with the semi-circular of tubular articles external diameter adaptation to be measured, left and right, middle survey sensor inserts semi-circular and measures in the respective sensor pilot hole of holder, and be locked in sensor localization hole by holding screw, sensor signal exports through cable, multiple degrees of freedom clamp bracket is measured holder by support fixing threaded hole with semi-circular and is connected, and multiple degrees of freedom clamp bracket is carried out position by its base and fixed.

2. vibration on-line measurement device in a kind of multipoint mode Guan rod-like articles cross section as claimed in claim 1, is characterized in that, with semi-circular holder and the semi-circular sliding seat for the treatment of test tube or bar external diameter adaptation, and four symmetrical sensors; Inserted by three sensors in sensor localization hole corresponding to semi-circular holder, a sensor inserts in sensor localization hole corresponding to another semi-circular sliding seat, by the holding screw locking above holder, sliding seat; The rotating hole of semi-circular holder and the corresponding side of semi-circular sliding seat is aimed at, by the turning axle fixed screw below holder through locking, semi-circular sliding seat can be pivoted; The support fixed orifice of cradling piece by semi-circular holder is installed; Rotate semi-circular sliding seat, make it fully open laterally, move support and make measurement mechanism near pipe under test, be substantially in the center of semi-circular holder, measurement mechanism with treat that test tube or bar do not contact; Rotate semi-circular sliding seat, make it close to the inside extremely, dock with semi-circular holder, by connecting screw through butt hole locking, now, treat that test tube or bar are in annular measurement mechanism center.

3. a multipoint mode Guan rod-like articles cross section vibration On-line Measuring Method, it is characterized in that, semi-circular with tubular articles external diameter adaptation to be measured is measured holder, left and right, middle survey sensor inserts semi-circular and measures in the respective sensor pilot hole of holder, and be locked in sensor localization hole by holding screw, sensor signal exports through cable, multiple degrees of freedom clamp bracket is measured holder by support fixing threaded hole with semi-circular and is connected, multiple degrees of freedom clamp bracket is carried out position by its base and is fixed, check that each several part is fixing can rearward, start to measure; Intermediate sensor direction of measurement is X, vibration displacement measured value is Δ x1, two, both sides sensor forms symmetry, orthogonal with intermediate sensor, and direction of measurement is Y, vibration displacement measured value is respectively Δ y1 and Δ y2, when pipe or bar vibration, the oscillating component being located at X-direction in cross section is Δ x, and oscillating component is in the Y direction Δ y, vibration total displacement is Δ L, then have:

Δx＝Δx1, $\mathrm{\Δ}y=\frac{\mathrm{\Δ}y1+\mathrm{\Δ}y2}{2},\mathrm{\Δ}L=\sqrt{{\mathrm{\Δx}}^2+{\mathrm{\Δy}}^2}.$

4. multipoint mode pipe as claimed in claim 3 rod-like articles cross section vibration On-line Measuring Method, it is characterized in that, increase a sensor again and insert in sensor localization hole corresponding to another semi-circular sliding seat, four sensors are symmetrical in pipe or bar cross section, two one group forms two groups of orthogonal measurement directions X and Y, vibration displacement measured value is respectively Δ x1 and Δ x2, Δ y1 and Δ y2, when pipe or bar vibration, the oscillating component being located at X-direction is Δ x, oscillating component is in the Y direction Δ y, vibration total displacement is Δ L, then have:

$\mathrm{\Δ}x=\frac{\mathrm{\Δ}x1+\mathrm{\Δ}x2}{2},\mathrm{\Δ}y=\frac{\mathrm{\Δ}y1+\mathrm{\Δ}y2}{2},\mathrm{\Δ}L=\sqrt{{\mathrm{\Δx}}^2+{\mathrm{\Δy}}^2}.$