CN105258662B - A kind of shafting engineering component end face space displacement and angle change measuring method based on stay-supported type displacement sensor - Google Patents
A kind of shafting engineering component end face space displacement and angle change measuring method based on stay-supported type displacement sensor Download PDFInfo
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- CN105258662B CN105258662B CN201510664763.0A CN201510664763A CN105258662B CN 105258662 B CN105258662 B CN 105258662B CN 201510664763 A CN201510664763 A CN 201510664763A CN 105258662 B CN105258662 B CN 105258662B
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Abstract
The invention discloses a kind of shafting engineering component end face space displacement and angle change measuring method based on stay-supported type displacement sensor.Step 1：Can survey shafting both ends of the surface optionally can ranging from three stay-supported type displacement sensors of three-point mount, respectively sensors A, sensor B and sensor C；Tested shafting end face selection can survey three stay-supported type displacement sensors of three-point mount of relative distance, respectively sensor D, sensor E and sensor F；Step 2：3 displacements that can be surveyed on end face are measured, measurement can survey 9 relative displacements between two end faces；Step 3：After being subjected to displacement, repeat step step 2, space displacement and angle variable quantity is calculated.The present invention can realize shafting engineering component end face space displacement and angle change measurement, measurement cost is relatively low, flexible and convenient to use, strong applicability according to use demand.
Description
Technical field
The invention belongs to shafting engineering component fields of measurement, more particularly to a kind of shafting based on stay-supported type displacement sensor
Engineering component end face space displacement and angle change measuring method.
Background technology
Marine shafting is the important component of power set in ship, and installation quality will directly affect main frame and shafting fortune
The persistence and reliability turned.In recent years, because marine shafting designs, arrangement is improper with construction technique, production technology is low
Under, production equipment falls behind, operates maintenance error relatively, survey tool and detection method fall behind, ship fire, blast and cabin are flooded
Water accident occurs often.Therefore the mounting process at shafting position is very important during shipbuilding.Design, cloth in shafting
Put with installation process, shafting theoretical centerline is indispensable standard.Shafting theoretical centerline is by host crankshaft
The heart, while the straight line at the center further through stern tube shaft system (or A-frame).It is typically true first with infrared-ray or irradiation method during installation
Dead axle is held or flange position, and shafting is welded further according to it.Shafting is mainly installed during installation using positioning trolley at present
Method, the row's of hanging method and double gantry crane lift-on/lift-off systems, these methods and manufacturing process also somewhat fall behind, therefore caused by shafting installation
Error is also very big.In addition, when ship navigates by water, various accidents also can be deformed certain of axle.Shafting end face position is measured on time
Move and the variable quantity of angle can avoid marine incident；It is continuing with and can save to make after determining the security intensity of shafting rod member
Ship cost.However, protective layer or thermal insulation layer are usually adhered in the outer surface of these shafting engineering components, resistance strain gage can not be used
Or optical means carries out displacement and the measurement of angle variable quantity, this just needs other methods to measure the variable quantity.
The content of the invention
It is low, simple to operate it is an object of the invention to provide a kind of cost, the shafting work based on stay-supported type displacement sensor
Journey member end space of planes displacement and angle change measuring method.
A kind of shafting engineering component end face space displacement and angle change measurement side based on stay-supported type displacement sensor
Method, comprise the following steps,
Step 1：Can survey shafting both ends of the surface optionally can ranging from three stay-supported type displacement sensors of three-point mount, point
Wei not sensors A, sensor B and sensor C；Tested shafting end face selection can survey three stay-supporteds of three-point mount of relative distance
Displacement transducer, respectively sensor D, sensor E and sensor F；
Step 2：The stay-supported type displacement sensor interconnection of end face three can be surveyed, can obtain 3 length LAB、LBCAnd LCA, point
It is connected not by sensors A with sensor D, sensor E and sensor F and obtains 3 length LAD、LAEAnd LAF, by sensor B with passing
Sensor D, sensor E and sensor F, which are connected, obtains 3 length LBD、LBEAnd LBF, by sensor C and sensor D, sensor E and
Sensor F, which is connected, obtains 3 length LCD、LCEAnd LCF, record this 12 length；
Step 3：After being subjected to displacement, repeat step step 2, space displacement and angle variable quantity is calculated.
The present invention a kind of shafting engineering component end face space displacement and angle variable quantity based on stay-supported type displacement sensor
Measuring method, it can also include：
1st, space displacement and angle variable quantity are respectively：
ΔL=L1-L2
Δα=α1-α2
Δβ=β1-β2
Wherein, (L1, α1, β1) for displacement occur before endface position, (L2, α2, β2) for displacement occur after position, L1Shape
Heart distance, α1For flip angles of the △ DEF with respect to △ ABC, β1Relative angle for DE relative to AB.
2nd, centre of form distance L1：
△ ABC centre of form O1The centre of form O of coordinate and △ DEF2Coordinate is：
Flip angle αs of the △ DEF with respect to △ ABC1：
(N, M, 1) is △ DEF normal vector,
DE relative to AB relative angle β1：
Wherein, (XD, YD, ZD) it is sensor D coordinates, (XE, YE, ZE) it is sensor E coordinates, (XF, YF, ZF) it is sensor F
Coordinate.
Beneficial effect：
This measuring method can realize that shafting engineering component end face space displacement and angle change measure according to use demand
Amount, measurement cost is relatively low, flexible and convenient to use, strong applicability.
Brief description of the drawings
Fig. 1 be specific implementation in simulate gearshift in be overall stay-supported type displacement sensor installation diagram；
Fig. 2 is ring flange schematic diagram in specific implementation.
Embodiment
The present invention is described in further details below in conjunction with accompanying drawing.
The present invention seeks to one kind based on stay-supported type displacement sensor measurement shafting engineering component end face space displacement and angle
Spend variable quantity method.
The principle of the present invention：First, can survey shafting both ends of the surface optionally can ranging from three stay-supported positions of three-point mount
Displacement sensor, tested shafting end face selection can survey three stay-supported type displacement sensors of three-point mount of relative distance.This six biographies
The position that sensor is placed can arbitrarily select, and can design two ring flanges and be arranged on shafting end face.The sensor of end face can be surveyed by taking
Position is A, B, C, and the sensing station for being tested end face is D, E, F.Then, the stay-supported type displacement sensor of end face three can be surveyed
(A, B, C) is interconnected, and can obtain 3 length (LAB、LBC、LCA), A is connected with D, E, F obtains L respectivelyAD、LAE、LAF, then by B
It is connected with D, E, F and obtains LBD、LBE、LBF, C is connected with D, E, F and obtains LCD、LCE、LCF。
Heron's formula is now utilized, triangle ABC areas is sought, seeks position of form center YCAnd XC。
D (X are understood by interspace analytic geometryD, YD, ZD) point coordinates satisfaction
Similarly, X can be solvedE, YE, ZEAnd XF, YF, ZF。
Then, △ DEF normal vector (N, M, 1) is obtained,
Next △ ABC centre of form O is calculated1The centre of form O of coordinate and △ DEF2Coordinate,
Centre of form distance is calculated,
Centre of form distance L1,
Flip angle αs of the △ DEF with respect to △ ABC1,
DE relative to AB relative angle β1,
When extraneous factor can make △ DEF be changed relative to △ ABC position, by measuring two triangles twice
Relative position, the variable quantity for being subjected to displacement front and back position can be obtained.Position (the L before displacement occurs is calculated1, α1, β1)
And then 12 measurable (L after being occurred using displacementAB、LBC、LCA、LAD、LAE、LAF、LBD、LBE、LBF、LCD、LCE、LCF), fortune
With above-mentioned computational methods, the endface position (L after displacement occurs can be tried to achieve2, α2, β2)。
So our cans calculate to obtain the front and rear endface position change of displacement generation：
ΔL=L1-L2 (14)
Δα=α1-α2 (15)
Δβ=β1-β2 (16)
Finally, by measuring L respectively twice before and after deformationAB、LBC、LCA、LAD、LAE、LAF、LBD、LBE、LBF、LCD、LCE、LCF
This 12 distances, obtain space displacement and angle variable quantity ΔL, Δα, Δβ.Therefore shafting engineering component end face space is obtained
Displacement and angle variable quantity.
A kind of shafting engineering component end face space displacement and angle change measurement side based on stay-supported type displacement sensor
Method, it is related to interspace analytic geometry principle, and using stay-supported type displacement sensor, measurement can survey relative displacement between two end faces, complete
Into shafting engineering component end face space displacement and angle change measurement.
Based on interspace analytic geometry principle, it need to only be tested end face and the relative displacement of end face locus can be surveyed, you can be complete
Into shafting engineering component end face space displacement and angle change measurement.
The method for arranging of the displacement sensor of each three of end face of two, stay-supported displacement system, it need to only be obtained using stay wire sensor
Tested end face and can survey any 3 relative distance in end face and, can survey end face and selected can survey 3 points of distance, you can obtain quilt
Survey end face can not displacement measured directly and angle, and then obtain space displacement and angle variable quantity.
Technical solution of the present invention is not limited to act specific experiment step set forth below, also allows various redesign to test
(1) will be two tested end faces, shown in Fig. 1, on high level of accuracy experimental bench.
(2) arbitrarily select three positions that six displacement transducers are installed respectively on two ring flanges, shown in Fig. 2.
(3) displacement transducer harvester is opened.
(4) displacement transducer is returned to zero.
(5) AB, BC, AC are sequentially connected with the steel wire of displacement transducer, and each line segment shown on record display device
Length.
(6) AD, AE, AF, BD, BE, BF, CD, CE, CF, and record display device are connected with the steel wire of displacement transducer successively
The length of each line segment of upper display.
(7) and repeat step 5, record data.
(8) according to the quantitative repeat step 6 of step 6, record data.
(9) stay-supported type displacement sensor is pulled down
(10) sensor harvester is closed.
Fig. 1 is that to be simulated in specific implementation in gearshift be overall stay-supported type displacement sensor installation diagram, including measured axis
1, displacement transducer 2, ring flange 3.
A kind of shafting engineering component end face space displacement and angle change measurement side based on stay-supported type displacement sensor
Method, it is related to interspace analytic geometry principle, and 3 points of installations totally 6 stay-supported type displacement sensors are respectively selected using two end faces are distributed in,
A, B, C, D, E, F are taken as respectively, measure the 3 displacement (L that can be surveyed on end faceAB、LBC、LCA), measurement can survey 9 between two end faces
Relative displacement (LAD、LAE、LAF、LBD、LBE、LBF、LCD、LCE、LCF), complete shafting engineering component end face space displacement and angle becomes
Change measurement.Measuring method is carried out in the following manner：Three bracing wire sensings are installed respectively at the both ends of shafting engineering component first
Device, the three point distances that can survey end face are sequentially connected with stay-supported type displacement sensor, and record the length of 3 line segments, then successively
With the displacement transducer for being connected with each other both ends of the surface, and the length of 9 line segments is recorded, pass through to calculate and obtain shafting engineering component end face
Space displacement and angle, and then obtain space displacement and angle variable quantity.This measuring method can realize shafting according to use demand
Engineering component end face space displacement and angle change measurement, measurement cost is relatively low, flexible and convenient to use, strong applicability.
Claims (1)
1. a kind of shafting engineering component end face space displacement and angle change measuring method based on stay-supported type displacement sensor,
It is characterized in that：Comprise the following steps,
Step 1：Can survey shafting both ends of the surface optionally can ranging from three stay-supported type displacement sensors of three-point mount, be respectively
Sensors A, sensor B and sensor C；Tested shafting end face selection can survey three stay-supported displacements of three-point mount of relative distance
Sensor, respectively sensor D, sensor E and sensor F；
Step 2：The stay-supported type displacement sensor interconnection of end face three can be surveyed, can obtain 3 length LAB、LBCAnd LCA, respectively will
Sensors A is connected with sensor D, sensor E and sensor F obtains 3 length LAD、LAEAnd LAF, by sensor B and sensor
D, sensor E is connected with sensor F obtains 3 length LBD、LBEAnd LBF, by sensor C and sensor D, sensor E and sensing
Device F, which is connected, obtains 3 length LCD、LCEAnd LCF, record this 12 length；
Step 3：After being subjected to displacement, repeat step two, space displacement and angle variable quantity is calculated；
Described space displacement and angle variable quantity be respectively：
ΔL=L1-L2
Δα=α1-α2
Δβ=β1-β2
Wherein, (L1, α1, β1) for displacement occur before endface position, (L2, α2, β2) for displacement occur after position, L1The centre of form away from
From α1For flip angles of the △ DEF with respect to △ ABC, β1Relative angle for DE relative to AB；
Described centre of form distance L1：
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△ ABC centre of form O1The centre of form O of coordinate and △ DEF2Coordinate is：
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Wherein, (XD, YD, ZD) it is sensor D coordinates, (XE, YE, ZE) it is sensor E coordinates, (XF, YF, ZF) sat for sensor F
Mark.
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| CN111207718B (en) * | 2020-03-19 | 2021-08-17 | 国网河南省电力公司电力科学研究院 | Device for measuring the inclination of a plane |
| CN111811451B (en) * | 2020-06-15 | 2021-09-21 | 重庆大学 | Method for measuring space displacement between lateral deviation parallel plates |
| CN112268785A (en) * | 2020-10-30 | 2021-01-26 | 中国石油天然气集团有限公司 | Curvature measuring instrument and method for petroleum pipe bending test |
| CN117928872A (en) * | 2024-03-18 | 2024-04-26 | 中国汽车技术研究中心有限公司 | Dummy ankle joint structure and dummy ankle joint damage evaluation method for collision test |
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