CN103452032B - Dynamic deflection obtaining method based on angles - Google Patents

Abstract

The invention discloses a dynamic deflection obtaining method based on angles. The method includes the following steps of firstly, measuring the movement speeds, in the axis directions of Doppler velocimeters, of corresponding road surface measurement points relative to the Doppler velocimeters, measuring the common rotating angular speed of the Dopler velocimeters, and measuring the movement speed of a dynamic detection device in the driving direction of a detection vehicle; secondly, obtaining an included angle, produced due to the rotation of the load beam, between a load beam and the road surface; thirdly, obtaining the road surface deformation speeds of the measurement points corresponding to the multiple Doppler velocimeters in a deflection basin; fourthly, setting up a corresponding deflection basin slope equation set; fifthly, solving the deflection basin slope equation set to obtain defection basin slope equation parameters, and thereby obtaining dynamic deflection values of the defection basin road section. According to the method, under the conduction of the high-frequency measurement points and the sampling with various intervals, continuous dynamic defection measurement results are provided, and the comprehensive evaluation of the road section can be more accurate and credible.

Description

Based on the dynamic deflection acquisition methods of angle

Technical field

The invention belongs to highway subgrade Non-destructive testing and assessment technique field, particularly, relate to a kind of dynamic deflection acquisition methods based on angle.

Background technology

The detection of pavement deflection is the basis evaluating road surface bearing capacity, for workmanship control and check most important, in addition, it also decides scientific level and the confidence level of road network Maintenance Decision making, directly affects the reasonability of maintenance fund allocation and rebuilding old road design.Although equipment and the method for countries in the world test flexure are different, are identical to the understanding of flexure basic conception.Flexure definition generally refers to total vertical deformation value (total flexure) that roadbed or road surface produce in the load action lower whorl gap position of required standard car or vertical rebound deformation value (rebound deflection), in units of 0.01mm.

The reasonable definition of road structure bearing capacity is: road structure before reaching unacceptable structural destruction or functional destruction, the number of pass times of the certain type of vehicle that can bear.It is generally acknowledged, the structural destruction that Asphalt Pavement Cracking causes is main relevant with the maximum tension stress in surface material or maximum stretching strain, and it is mainly relevant with the maximum crushing stress in basic unit or roadbed granular material or maximum compressive strain that road surface occurs that rut or planeness reduce the functional destruction of causing.

China's Flexible Pavement Design is using the modulus of resilience as design parameters, using flexure as mechanics Con trolling index.Its mechanics is defined as the surperficial vertical displacement component of model under vertical force effect, and namely subgrade and pavement is under load action, the vertical deformation that end face occurs.Although a large amount of practice and research data surface, there is not simple linear relationship in roadbed flexure and its bearing capacity, flexure still reflects the supporting capacity of subgrade and pavement to a certain extent.If deflection value is excessive, its distortion is also larger, and each layer in road surface also just easily breaks.

Current China pavement detection still mainly relies on the backman beam pavement deflection determination method introduced from Canada the sixties in last century, adopts the mode of artificial reading, free-hand record, tests the speed slowly, precision is low, poor reliability.Recently also have the flexure deflection adopting high-precision laser range sensor directly to measure road surface, due to the complexity of road surface texture, the method can only static conditions, measures under being not suitable for dynamic condition.

The supporting capacity of road structure depends primarily on its stress-strain state, and the flexure observed with backman beam exists obvious irrationality to evaluate road surface supporting capacity.Since the eighties in 20th century, along with Falling Weight Deflectometer is progressively used widely, according to deflection basin information inverse road surface structare layer modulus and then evaluate road surface supporting capacity and be subject to most attention in the world, and demonstrate the tremendous economic social benefit that new and high technology brings.But it is reported, China's overwhelming majority FWD Subscriber Unit does not have supporting analysis software, FWD also only as a kind of high-precision flexure measuring apparatus in use, do not given play to its due effect.

The JG-2005 type laser automatic bending instrument of Ministry of Communications's highway Research Institute, for carrying out pavement strength Indexs measure, its operating principle is identical with the operating principle of backman beam, is all utilize lever principle, is measured the distortion on road surface by the displacement of lever.

Prior art is static collection, the requirement of high speed detection cannot be met, and the present invention support road surface dynamic deflection in high speed detection situation quick, accurately calculate, high speed detection method is made to be able to complete application, break away from the weakness of prior art inefficiency, rapidly and efficiently measure deflection value, use manpower and material resources sparingly.Prior art is single-point acquiring, cannot meet high-frequency requirement, and the present invention under high-frequency measuring point, multiple spacing sampling situations, can provide continuous print dynamic deflection measurement result, more accurately credible to the comprehensive assessment in section.

Summary of the invention

Main purpose of the present invention is to provide a kind of dynamic deflection acquisition methods based on angle, and the method for the surface deformation speed of kinetic measurement, can calculate road surface dynamic deflection quickly and accurately.

For solve of the prior art " test the speed slow, precision is low, poor reliability " etc. technical problem, the present invention proposes a kind of dynamic deflection acquisition methods based on angle, comprise the following steps:

Step 1, when being arranged on the dynamic deflection checkout equipment on inspection vehicle and advancing to along with inspection vehicle the flexure section needing to detect, the reference Doppler anemometer be positioned at outside deflection basin measures corresponding road surface measuring point relative to the movement velocity of Doppler anemometer on Doppler anemometer direction of axis line respectively with the multiple Doppler anemometers being positioned at deflection basin, the common angular velocity of rotation of described Doppler anemometer measured by angular-rate sensor in the load beam of dynamic deflection checkout equipment, the movement velocity of dynamic detecting equipment along the direction of traffic of described inspection vehicle measured by velocity sensor on dynamic deflection checkout equipment,

Angular velocity of rotation, the measured value of described dynamic detecting equipment along the movement velocity of direction of traffic, described reference Doppler anemometer and the setting angle of described reference Doppler anemometer that step 2, basis are measured in step 1, obtain the load beam of load beam because of rotation generation and the angle on road surface;

Step 3, according to described in be positioned at the measured value of multiple Doppler anemometers of deflection basin, the angular velocity of rotation measured in step 1, described in be positioned at deflection basin multiple Doppler setting angle, the described load beam obtained in step 2 surveyed along the movement velocity of direction of traffic, obtain the surface deformation speed of the multiple Doppler anemometers correspondence measuring points in described deflection basin with the angle on road surface, described dynamic detecting equipment;

Step 4, according to deflection basin curve slope equation, using the surface deformation speed of the corresponding measuring point obtained in step 3 as input, set up corresponding deflection basin slope equation group;

Step 5, by solving described deflection basin slope equation group, obtain deflection basin slope equation parameter, thus obtain the dynamic deflection in described flexure section.

Beneficial effect of the present invention is:

Accompanying drawing explanation

Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is further described in detail.

Fig. 1 is surface deformation tachometric survey schematic diagram according to an embodiment of the invention.

Fig. 2 is the schematic diagram realizing the dynamic segmentation of computing unit self adaptation according to an embodiment of the invention according to surface evenness.

Fig. 3 is the schematic diagram of the angle on Doppler anemometer any time and road surface according to an embodiment of the invention.

Fig. 4 is the schematic flow sheet of dynamic deflection acquisition methods according to an embodiment of the invention.

Detailed description of the invention

Be further described the specific embodiment of the present invention below in conjunction with embodiment, advantage and disadvantage of the present invention will be more clear along with description.

First, general principle of the present invention is first summarized.

The present invention utilizes the related datas such as the reference Doppler anemometer be arranged on outside deflection basin, obtain any time load beam because of rotate produce with road surface angle, obtain the angle of Doppler anemometer any time and direction, vertical road surface in deflection basin again, thus accurately obtain the horizontal velocity of any time Doppler anemometer, the linear velocity of Doppler anemometer is on the impact of single Doppler range rate measurement apparatus measuring value, thus the surface deformation speed obtained in each Doppler anemometer, deflection basin slope is obtained along the ratio of the horizontal movement speed in direction, road surface again by surface deformation speed and Doppler anemometer carrier, recycling deflection basin slope obtains the parameter of deflection basin curve, and then obtain the dynamic deflection on road surface.In addition, the present invention, can combining road condition information in the process calculating dynamic deflection, to the self adaptation dynamic segmentation detecting section image data and realize computing unit; Consider the impact on measurement result such as roadbed material, road surface thickness, pavement temperature, measuring speed, rut, planeness, revised by knowledge base model road pavement rate of strain, deflection value, thus obtain the dynamic deflection irrelevant with measuring tempeature, measuring speed.

Described self adaptation dynamic segmentation detection section image data being realized to computing unit, refer to detect the traffic information in section for foundation, realize the self adaptation dynamic segmentation of computing unit, described traffic information comprises section mileage, surface evenness, pavement track, road surface thickness, roadbed material etc., the criterion of described self adaptation dynamic segmentation to be each unit be to the element of this unit " similar " again with the continuous element set of adjacent cells " dissmilarity ".

Described computing unit, refers to that the section data to detecting continuously carry out segmentation, using each segment data after segmentation as a computing unit.

In the autokinesis compensation process of described Doppler anemometer carrier, outside deflection basin, by install one with the reference Doppler anemometer measuring surface deformation speed beam altogether, because the speed recorded in Doppler anemometer is not for this reason containing surface deformation speed, therefore the value recorded by this Doppler anemometer is as reference value

The auxiliary speed noise eliminating Doppler anemometer measurement in deflection basin.

Described any time, Doppler anemometer carrier was because rotating the angle calcu-lation formula on Doppler anemometer carrier and the road surface produced as the formula (1), wherein β represent any time Doppler anemometer carrier because of rotate produce Doppler anemometer carrier and road surface angle, V _{dev_ref}represent the speed of road surface relative reference Doppler anemometer carrier on reference Doppler anemometer direction of axis line that deflection basin External Reference Doppler anemometer is measured, V _{rot_ref}represent the linear velocity with reference to Doppler anemometer, V _horrepresent the movement velocity of Doppler anemometer carrier along direction of traffic, a _refreference Doppler anemometer outside expression deflection basin and the setting angle of plumb line.

$\mathrm{\β}=\arcsin \left(\frac{V_{\mathrm{dev}\_\mathrm{ref}}-V_{\mathrm{rot}\_\mathrm{ref}}}{V_{\mathrm{hor}}}\right)-{\mathrm{\α}}_{\mathrm{ref}}---\left(1\right)$

In described deflection basin in Doppler anemometer the surface deformation speed design formulas of corresponding measuring point as the formula (2), wherein V _defrepresent the surface deformation speed of the corresponding measuring point of Doppler anemometer, V _devrepresent the value that Doppler anemometer is measured, V _horrepresent the movement velocity of Doppler anemometer carrier along direction of traffic, α represents the setting angle of Doppler anemometer and plumb line, and β Doppler anemometer carrier is because rotating the Doppler anemometer carrier and road surface angle that produce, V _rotrepresent the linear velocity of Doppler anemometer.

V _def＝V _dev-V _horsin(α+β)-V _rot（2）

Fig. 3 is the schematic diagram of the angle on Doppler anemometer any time and road surface according to an embodiment of the invention.

Doppler anemometer in described deflection basin, in dynamic deflection measuring process, multiple stage Doppler anemometer can be installed in deflection basin, to improve the certainty of measurement of surface deformation speed, thus the surface deformation speed of the corresponding multi-measuring point of multiple stage Doppler anemometer difference can be obtained, as the formula (3), wherein V _defirepresent the surface deformation speed of the corresponding measuring point of i-th Doppler anemometer, V _devirepresent the value that i-th Doppler anemometer is measured, V _horrepresent the movement velocity of Doppler anemometer carrier along direction of traffic, α _irepresent the setting angle of i-th Doppler anemometer and plumb line, β represents that Doppler anemometer carrier is because rotating the Doppler anemometer carrier and road surface angle that produce, V _rotirepresent the linear velocity of i-th Doppler anemometer, i=1,2 ..., n.

$\left\{\begin{array}{c}{V}_{\mathrm{def}1}=V_{\mathrm{dev}1}-V_{\mathrm{hor}}\sin ({\mathrm{\α}}_1+\mathrm{\β})-V_{\mathrm{rot}1}\\ V_{\mathrm{def}2}=V_{\mathrm{dev}2}-V_{\mathrm{hor}}\sin ({\mathrm{\α}}_2+\mathrm{\β})-V_{\mathrm{rot}2}\\ \·\·\·\\ V_{\mathrm{defn}}=V_{\mathrm{devn}}-V_{\mathrm{hor}}\sin ({\mathrm{\α}}_n+\mathrm{\β})-V_{\mathrm{rotn}}\end{array}\right.----\left(3\right)$

Described Doppler anemometer carrier directly obtains along the movement velocity of direction of traffic by velocity sensor, or obtains the horizontal movement variable quantity acquisition of Doppler anemometer carrier in the unit interval by displacement transducer; The linear velocity of described Doppler anemometer can first utilize angular-rate sensor to obtain the angular velocity of rotation of Doppler anemometer carrier, be multiplied by Doppler anemometer radius of gyration again to obtain, such as formula (4), the angular velocity of rotation of described sensor carrier also obtains by the angle changing value in the angular transducer unit interval.

V _rot＝L _rad*V _ang*π/180 （4）

V in formula (4) _rotrepresent the linear velocity of Doppler anemometer, L _radrepresent the distance of Doppler anemometer distance center of rotation, V _angrepresent the Doppler anemometer angular velocity of rotation (unit: degree/second) that angular-rate sensor obtains.

The multi-measuring point surface deformation speed of described extraction can according to the derivative of line of deflection (deflection basin curve) equation, i.e. deflection basin curve slope, set up corresponding deflection basin slope equation group, and solve deflection basin slope equation and deflection curve equation parameter, thus obtain road surface dynamic deflection.

Described line of deflection (deflection basin curve) equation as the formula (5), wherein y (x) represents the road surface vertical deformation amount at distance load center x place, F represents that checkout equipment puts on the pressure loading on road surface, E is expressed as roadbed material rigidity modulus, I is dynamic moment of inertia, k is coefficient of subgrade reaction (reaction modulus), and x represents the distance of distance load center.

$\left(x\right)=[-\frac{F}{\sqrt{4\mathrm{EIk}}}/(2*{\left(\frac{k}{4\mathrm{EI}}\right)}^{1/4})]e^{-{\left(\frac{k}{4\mathrm{EI}}\right)}^{1/4}x}(\cos \left({\left(\frac{k}{4\mathrm{EI}}\right)}^{1/4}x\right)+\sin \left({\left(\frac{k}{4\mathrm{EI}}\right)}^{1/4}x\right))---\left(5\right)$

As the formula (6), wherein the implication of parameter is identical with formula (5) for described deflection basin curve slope equation.

$y^{\′}\left(x\right)=\frac{F}{\sqrt{4\mathrm{EIk}}}\left(\sin \left({\left(\frac{k}{4\mathrm{EI}}\right)}^{1/4}x\right)\right)e^{-{\left(\frac{k}{4\mathrm{EI}}\right)}^{1/4}x}---\left(6\right)$

Described deflection basin slope equation group as the formula (7), wherein V _defirepresent the surface deformation speed of the corresponding measuring point of i-th Doppler anemometer, V _horrepresent the movement velocity of Doppler anemometer carrier along direction of traffic, the implication of F, E, I, k is identical with formula (5), x _irepresent the distance of i-th Doppler anemometer corresponding measuring point distance load center, i=1,2 ..., n.

$\left\{\begin{array}{c}{V}_{\mathrm{def}1}/V_{\mathrm{hor}}=\frac{F}{\sqrt{4\mathrm{EIk}}}\left(\sin \left({\left(\frac{k}{4\mathrm{EI}}\right)}^{1/4}{x}_1\right)\right)e^{-{\left(\frac{k}{4\mathrm{EI}}\right)}^{1/4}{x}_1}\\ V_{\mathrm{def}2}/V_{\mathrm{hor}}=\frac{F}{\sqrt{4\mathrm{EIk}}}\left(\sin \left({\left(\frac{k}{4\mathrm{EI}}\right)}^{1/4}{x}_2\right)\right)e^{-{\left(\frac{k}{4\mathrm{EI}}\right)}^{1/4}{x}_2}\\ \·\·\·\\ V_{\mathrm{defn}}/V_{\mathrm{hor}}=\frac{F}{\sqrt{4\mathrm{EIk}}}\left(\sin \left({\left(\frac{k}{4\mathrm{EI}}\right)}^{1/4}{x}_n\right)\right)e^{-{\left(\frac{k}{4\mathrm{EI}}\right)}^{1/4}{x}_n}\end{array}\right.---\left(7\right)$

In described deflection basin slope equation group formula (7), will as a parameter A, will as a parameter B, because of V _defiobtain by formula (3), V _horobtain by corresponding sensor, x _iobtained by the installation site of Doppler anemometer, then only have two unknown parameters in deflection basin slope equation group, therefore installation two and above Doppler anemometer then can solve in deflection basin with value, eventually through obtain the surface deformation amount of load center, namely obtain dynamic deflection now.

With reference to the accompanying drawings the specific embodiment of the present invention is described.

Fig. 1 is the measuring principle figure of surface deformation speed according to an embodiment of the invention.

As shown in Figure 1, load beam installs 4 Doppler anemometers, the position that they are arranged on distance load (wheel is applied to the load on road surface) initial point 100mm, 300mm, 750mm, 3600mm successively respectively (supposes that deflection basin radius is less than 3600mm, the Doppler anemometer being then arranged on 3600mm position can be used as with reference to Doppler anemometer), for measuring the movement velocity V of the relative Doppler anemometer in road surface on Doppler anemometer installation direction _dev1, V _dev2, V _dev3, V _{dev_ref}; Load beam installs 1 angular-rate sensor (gyroscope), for measuring the angular velocity of rotation V of Doppler anemometer carrier _ang.In addition, inspection vehicle is installed the horizontal movement speed V of encoder for sensing lead crossbeam _hor, its middle cross beam and car cabin are fixed.

Inspection vehicle can be installed for measuring rut, planeness, road surface thickness, the corresponding sensor of road table temperature, for measuring the rut, planeness, road surface thickness and the road table temperature that detect section, thus detection traffic information is utilized to realize dynamic segmentation to the computing unit detecting section.

Fig. 2 is the schematic diagram realizing the dynamic segmentation of computing unit self adaptation according to an embodiment of the invention according to surface evenness.To realize the dynamic segmentation of computing unit self adaptation according to surface evenness, continuous section similar for flatness value is dynamically divided into a computing unit, divides effect as shown in Figure 2.

To the data that the measuring system shown in Fig. 1 gathers, suppose crossbeam-rotating centre distance load center 1700mm place; The installation angle supposing the Doppler anemometer of distance load center 100mm, 300mm, 750mm, 3600mm is α ₁=2.3825 °, α ₂=2.3997 °, α ₃=2.5143 °, α _ref=2.520 °; Suppose that the data (unit: mm/s) that the Doppler anemometer of certain moment distance load center 100mm, 300mm, 750mm, 3600mm gathers are respectively V _dev1=576.6941, V _dev2=581.9808, V _dev3=587.2337, V _{dev_ref}=546.9968, the data that angular-rate sensor (gyroscope) gathers are V _ang=0.6115rad/s, the road speed of velocity sensor collection is V _hor=12385mm/s.

The radius of gyration that convolution (4) can obtain the Doppler anemometer speed of distance load center 100mm, 300mm, 750mm, 3600mm is respectively 1600mm, 1400mm, 950mm ,-1900mm, and linear velocity (unit: mm/s) is respectively V _rot1=17.0753, V _rot2=14.9409, V _rot3=10.1385, V _{rot_ref}=-20.277, convolution (1) can obtain β=0.1053 °; The surface deformation speed (unit: mm/s) that convolution (3) can obtain distance load center 100mm, 300mm, 750mm place is V _def1=22.0389, V _def2=25.7481, V _def3=11.0586; Utilize the surface deformation speed at 100mm, 300mm place, in conjunction with deflection basin slope equation group formula (7), parameter is solved and can be obtained then this in moment $y\left(0\right)=-\frac{F}{\sqrt{4\mathrm{EIk}}}/(2*{\left(\frac{k}{4\mathrm{EI}}\right)}^{1/4})=-0.00094769m,$ Namely dynamic deflection (unit: 0.01mm) is now 94.769.

Fig. 4 is the schematic flow sheet of dynamic deflection acquisition methods according to an embodiment of the invention.

Dynamic deflection acquisition methods mainly comprises the following steps according to an embodiment of the invention: step 1, when being arranged on the dynamic deflection checkout equipment on inspection vehicle and advancing to along with inspection vehicle the flexure section needing to detect, the reference Doppler anemometer be positioned at outside deflection basin measures corresponding road surface measuring point relative to the movement velocity of Doppler anemometer on Doppler anemometer direction of axis line respectively with the multiple Doppler anemometers being positioned at deflection basin, the common angular velocity of rotation of described Doppler anemometer measured by angular-rate sensor in the load beam of dynamic deflection checkout equipment, the movement velocity of dynamic detecting equipment along the direction of traffic of described inspection vehicle measured by velocity sensor on dynamic deflection checkout equipment, angular velocity of rotation, the measured value of described dynamic detecting equipment along the movement velocity of direction of traffic, described reference Doppler anemometer and the setting angle of described reference Doppler anemometer that step 2, basis are measured in step 1, obtain the load beam of load beam because of rotation generation and the angle on road surface, step 3, according to described in be positioned at the measured value of multiple Doppler anemometers of deflection basin, the angular velocity of rotation measured in step 1, described in be positioned at deflection basin multiple Doppler setting angle, the described load beam obtained in step 2 surveyed along the movement velocity of direction of traffic, obtain the surface deformation speed of the multiple Doppler anemometers correspondence measuring points in described deflection basin with the angle on road surface, described dynamic detecting equipment, step 4, according to deflection basin curve slope equation, using the surface deformation speed of the corresponding measuring point obtained in step 3 as input, set up corresponding deflection basin slope equation group, step 5, by solving described deflection basin slope equation group, obtain deflection basin slope equation parameter, thus obtain and export the dynamic deflection in described flexure section.

It should be noted last that, above detailed description of the invention is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.

Claims (6)

1., based on a dynamic deflection acquisition methods for angle, comprise the following steps:

Step 1, when being arranged on the dynamic deflection checkout equipment on inspection vehicle and advancing to along with inspection vehicle the flexure section needing to detect, the reference Doppler anemometer be positioned at outside deflection basin measures corresponding road surface measuring point relative to the movement velocity of Doppler anemometer on Doppler anemometer direction of axis line respectively with the multiple Doppler anemometers being positioned at deflection basin, the common angular velocity of rotation of described Doppler anemometer measured by angular-rate sensor in the load beam of dynamic deflection checkout equipment, the movement velocity of dynamic deflection checkout equipment along the direction of traffic of described dynamic deflection checkout equipment measured by velocity sensor on dynamic deflection checkout equipment,

Angular velocity of rotation, the measured value of described dynamic deflection checkout equipment along the movement velocity of direction of traffic, described reference Doppler anemometer and the setting angle of described reference Doppler anemometer that step 2, basis are measured in step 1, obtain the load beam of load beam because of rotation generation and the angle on road surface;

Step 3, according to described in be positioned at the measured value of multiple Doppler anemometers of deflection basin, the angular velocity of rotation measured in step 1, described in be positioned at multiple Doppler anemometers of deflection basin setting angle, the described load beam obtained in step 2 and the angle on road surface, described dynamic deflection checkout equipment along the movement velocity of direction of traffic, obtain the surface deformation speed of the multiple Doppler anemometers correspondence measuring points in described deflection basin;

Step 4, according to deflection basin curve slope equation, using the surface deformation speed of the corresponding measuring point obtained in step 3 as input, set up corresponding deflection basin slope equation group;

Step 5, by solving described deflection basin slope equation group, obtain deflection basin slope equation parameter, thus obtain the dynamic deflection in described flexure section.

2. dynamic deflection acquisition methods as claimed in claim 1, wherein, after step 1, further comprising the steps of:

Step 1-1, carry out the self adaptation dynamic segmentation of computing unit to detecting the data that section gathers,

Wherein, according to the traffic information detecting section, the continuous section of traffic information in preset range is divided into a computing unit, and carrying out described step 2 to 5 for each computing unit, described traffic information comprises section mileage, surface evenness, pavement track, road surface thickness, roadbed material.

3. dynamic deflection acquisition methods as claimed in claim 1 or 2, wherein, described step 2 comprises the following steps:

Load beam is obtained because rotating the angle on load beam and the road surface produced by following equation,

$\mathrm{\β}=\arcsin \left(\frac{V_{\mathrm{dev}\_\mathrm{ref}}-V_{\mathrm{rot}\_\mathrm{ref}}}{V_{\mathrm{hor}}}\right)-{\mathrm{\α}}_{\mathrm{ref}}---\left(1\right)$

Wherein, V _{rot_ref}represent the linear velocity with reference to Doppler anemometer, V _horrepresent the movement velocity of described dynamic deflection checkout equipment along direction of traffic, α _refrepresent the described setting angle with reference to Doppler anemometer, V _{dev_ref}represent the speed of road surface relative reference Doppler anemometer carrier on reference Doppler anemometer direction of axis line that deflection basin External Reference Doppler anemometer is measured,

Wherein,

V _{rot_ref}＝L _{rad_ref}*V _ang*π/180

Wherein, L _{rad_ref}represent the distance with reference to Doppler anemometer distance center of rotation, V _angrepresent the angular velocity of rotation that the Doppler anemometer of angular-rate sensor acquisition is common.

4. dynamic deflection acquisition methods as claimed in claim 3, wherein, described step 3 comprises the following steps:

The surface deformation speed of the corresponding measuring point of the multiple Doppler anemometers obtained in described deflection basin by following equation,

$\left\{\begin{array}{c}{V}_{\mathrm{def}1}=V_{\mathrm{dev}1}-V_{\mathrm{hor}}\sin ({\mathrm{\α}}_1+\mathrm{\β})-V_{\mathrm{rot}1}\\ V_{\mathrm{def}2}=V_{\mathrm{dev}2}-V_{\mathrm{hor}}\sin ({\mathrm{\α}}_2+\mathrm{\β})-V_{\mathrm{rot}2}\\ ...\\ V_{\mathrm{defn}}=V_{\mathrm{devn}}-V_{\mathrm{hor}}\sin ({\mathrm{\α}}_n+\mathrm{\β})-V_{\mathrm{rotn}}\end{array}\right.---\left(3\right)$

Wherein, V _defirepresent the surface deformation speed of the corresponding measuring point of i-th Doppler anemometer in described deflection basin, V _devirepresent the value that i-th Doppler anemometer is measured, α _irepresent the setting angle of i-th Doppler anemometer and plumb line, V _rotirepresent the linear velocity of i-th Doppler anemometer, i=1,2 ..., n, n are the multiple Doppler anemometer numbers in described deflection basin.

5. dynamic deflection acquisition methods as claimed in claim 4, wherein, described step 4 comprises the following steps:

Set up described deflection basin slope equation group, shown in (7),

$\left\{\begin{array}{c}{V}_{\mathrm{def}1}/V_{\mathrm{hor}}=\frac{F}{\sqrt{4\mathrm{EIk}}}\left(\sin \left({\left(\frac{k}{4\mathrm{EI}}\right)}^{1/4}{x}_1\right)\right)e^{-{\left(\frac{k}{4\mathrm{EI}}\right)}^{1/4}{x}_1}\\ V_{\mathrm{def}2}/V_{\mathrm{hor}}=\frac{F}{\sqrt{4\mathrm{EIk}}}\left(\sin \left({\left(\frac{k}{4\mathrm{EI}}\right)}^{1/4}{x}_2\right)\right)e^{-{\left(\frac{k}{4\mathrm{EI}}\right)}^{1/4}{x}_2}\\ ...\\ V_{\mathrm{defn}}/V_{\mathrm{hor}}=\frac{F}{\sqrt{4\mathrm{EIk}}}\left(\sin \left({\left(\frac{k}{4\mathrm{EI}}\right)}^{1/4}{x}_n\right)\right){e^{}}^{-{\left(\frac{k}{4\mathrm{EI}}\right)}^{1/4}{x}_n}\end{array}\right.---\left(7\right)$

Wherein V _defirepresent the surface deformation speed of the corresponding measuring point of i-th Doppler anemometer, F represents that dynamic deflection checkout equipment puts on the pressure loading on road surface, and E is expressed as roadbed material rigidity modulus, and I is dynamic moment of inertia, and k is coefficient of subgrade reaction, x _irepresent the distance of described i-th Doppler anemometer corresponding measuring point distance load center.

6. dynamic deflection acquisition methods as claimed in claim 5, wherein, described step 5 comprises the following steps:

Utilize described deflection basin slope equation group, solve with value, and obtain the surface deformation amount of load center as dynamic deflection now.