CN109916743A - Dynamic mechanical measuring device, measurement method and calculating equipment - Google Patents
Dynamic mechanical measuring device, measurement method and calculating equipment Download PDFInfo
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- CN109916743A CN109916743A CN201910217254.1A CN201910217254A CN109916743A CN 109916743 A CN109916743 A CN 109916743A CN 201910217254 A CN201910217254 A CN 201910217254A CN 109916743 A CN109916743 A CN 109916743A
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Abstract
The present invention provides a kind of dynamic mechanical measuring device, measurement method and calculates equipment.The device includes the first bar and the second bar of coaxial arrangement, and wherein detected materials sample can be located between the first bar and the second bar；Two optical outputting systems, it is respectively used to the two-way orhtogonal linear polarizaiton light that output is in predetermined angle, the two-way orhtogonal linear polarizaiton light that an optical outputting system therein is exported is incident to the first position point of first bar, and the reflected light after the point reflection of first position is transmitted in the same direction；The two-way orhtogonal linear polarizaiton light that another optical outputting system is exported is incident to the second position point of the second bar, and the reflected light after the second position point reflection is transmitted in the same direction；Optical detector, for obtaining the first optical information of the reflected light through the first position point reflection and the second optical information of the reflected light through the second position point reflection respectively.The dynamic mechanical for obtaining material can be accurately measured using the device.
Description
Technical field
The present invention relates to mechanical meaurement technical field, a kind of dynamic mechanical measuring device, measurement method are referred in particular to
And calculate equipment.
Background technique
Material is in the static mechanical property under static load and the dynamic mechanical under shock loading because used by structure
There is the differences of highly significant for the influence of property effect and material strain effect.For any product being made of material Lai
It says, some effects for being similar to and the shock loadings such as colliding, fall can be all encountered in manufacture, use, transport and storing process,
Therefore accurate grasp material is in the dynamic mechanical under dynamic load for the engineering design of material and engineer application
All there is very important theoretical and realistic meaning.
The prior art carries out the measurement of dynamic mechanical, includes the separate type Hope based on optical fiber Doppler anemometer
The gloomy compression bar measurement method of gold, the split hopkinson press bar measurement method based on lateral displacement interference and Normal Displacement interference with
And the split hopkinson press bar method based on laser interferometer displacement measurement.However, several measurement methods vulnerable to stray light,
The influence of the factors such as air flowing, external shock leads to its anti-interference ability and all poor to the adaptability of environment, so that
Existing separate type Hopkinson measurement method is unable to satisfy in military and civilian field to material the precise measurement under high strain-rate
The demand of its dynamic mechanical.
Summary of the invention
The purpose of technical solution of the present invention, which is to provide a kind of dynamic mechanical measuring device, measurement method and calculates, to be set
It is standby, the dynamic mechanical for obtaining material can be accurately measured.
The embodiment of the present invention provides a kind of dynamic mechanical measuring device, wherein includes:
Coaxial arrangement the first bar and the second bar, wherein detected materials sample can be located in first bar with it is described
Between second bar；
Two optical outputting systems are respectively used to the two-way orhtogonal linear polarizaiton light that output is in predetermined angle, a light therein
The first position point that the two-way orhtogonal linear polarizaiton light that output system is exported is incident to first bar is learned, and through described first
Reflected light after setting point reflection is transmitted in the same direction；The two-way orhtogonal linear polarizaiton light that another optical outputting system is exported is incident
The extremely second position point of second bar, and the reflected light after the second position point reflection is transmitted in the same direction；
Optical detector, for obtain respectively the reflected light through the first position point reflection the first optical information and
Second optical information of the reflected light through the second position point reflection.
Optionally, the dynamic mechanical measuring device, wherein the dynamic mechanical measuring device is also wrapped
It includes:
Third bar is coaxially disposed with first bar and second bar, and the third bar and first bar are separate
One end of second bar abuts；
Guide sleeve is coaxially disposed with the third bar and first bar, and the guide sleeve is sheathed on the third bar and institute
State the outside that the first bar abuts against position；
Support base, including multiple mounting holes that same center line is arranged, wherein the guide sleeve, first bar and described
Two bars are slidably arranged in respectively in an at least mounting hole.
Optionally, the dynamic mechanical measuring device, wherein each optical outputting system includes:
For exporting the laser of incident beam；
Filter for being filtered to the incident beam；
Light conversion element, for the incident beam for passing through filtering processing to be converted to orhtogonal linear polarizaiton light all the way；
Beam splitter, the orhtogonal linear polarizaiton light all the way for will be exported through the light conversion element are converted in described
The two-way orhtogonal linear polarizaiton light of predetermined angle.
Optionally, the dynamic mechanical measuring device, wherein the light conversion element includes: from the filtering
The half wave plate and quarter-wave plate that device to the beam splitter is arranged successively, wherein the half wave plate is around certainly
The center line of body is with default angular speed rotation.
Optionally, the dynamic mechanical measuring device, wherein the beam splitter includes:
Amici prism, the orhtogonal linear polarizaiton light all the way for being exported the light conversion element, is converted to and is mutually perpendicular to
Two-way orhtogonal linear polarizaiton light；
Two reflecting mirrors, each reflecting mirror respectively corresponds reception orhtogonal linear polarizaiton light all the way, and is connect for reflecting
The orhtogonal linear polarizaiton light of receipts, so that be in the predetermined angle between the orhtogonal linear polarizaiton light reflected through two reflecting mirrors,
Form the two-way orhtogonal linear polarizaiton light that the optical outputting system is exported.
Optionally, the dynamic mechanical measuring device, wherein two optical outputting systems are exported every
All the way in orhtogonal linear polarizaiton light, the angular frequency and the line along Y-direction of the linearly polarized light in X direction of the orhtogonal linear polarizaiton light are inclined
The difference of the angular frequency of vibration light is predeterminated frequency value.
Optionally, the dynamic mechanical measuring device, wherein the optical detector is for obtaining reflected light
Image imagery optical detector, or the digit optical detector for the spot intensity for obtaining reflected light.
The embodiment of the present invention also provides a kind of dynamic mechanical measurement method, wherein the measurement method is using as above
Described in any item dynamic mechanical measuring devices, wherein the measurement method includes:
Receive the impact force along axis direction in first bar, first bar by the impact force by it is described to
It surveys material sample and is transmitted to second bar, and wherein an optical outputting system is exported to the first position of first bar
Point two-way orhtogonal linear polarizaiton light, another optical outputting system export to the second position point of second bar two-way just
When intersection polarised light, the optical detector first optical information obtained and second optical information are obtained；
According to first optical information and second optical information, the dynamic mechanical of the detected materials sample is determined
Performance.
Optionally, the dynamic mechanical measurement method, wherein described according to first optical information and described
Second optical information determines the dynamic mechanical of the detected materials sample, comprising:
According to first optical information and second optical information, determination is receiving the impact force process respectively
In, the first spot intensity information of the reflected light through the first position point reflection and the reflection through the second position point reflection
Second spot intensity information of light；
According to the first spot intensity information and the second spot intensity information, determination is receiving the punching respectively
It hits during power, the second microstrain of the first microstrain of first bar and second bar；
According to first microstrain and second microstrain, at least two in following velocity information are determined:
First incidence rate, the first reflection speed and the first transmission speed；
Wherein, first incidence rate is the incident force pulse on first bar in the first position of first bar
Transmission speed at point, the first reflection speed are that the incident force pulse on first bar is anti-by the detected materials sample
Reflectivity pulse is formed after penetrating, the transmission speed at the first position point of first bar, the first transmission speed is institute
It states incident force pulse and is transmitted to the second bar formation transmitted pulse through the detected materials sample, the second of second bar
Transmission speed at location point；
According to identified velocity information, the dynamic mechanical of the detected materials sample is calculated.
Optionally, the dynamic mechanical measurement method, wherein the dynamic mechanical include dynamic stress,
Dynamic strain and dynamic strain rate.
Optionally, the dynamic mechanical measurement method, wherein it is described according to the first spot intensity information and
Second facula information determines the first microstrain of first bar and institute during receiving the impact force respectively
State the second microstrain of the second bar, comprising:
According to the first spot intensity information, demodulation obtains first bar during receiving the impact force
Phase information is truncated；And according to the second spot intensity information, demodulation obtains institute during receiving the impact force
State the truncation phase information of the second bar；
According to the truncation phase information of first bar, the continuous phase information of first bar is obtained；And according to institute
The truncation phase information of the second bar is stated, the continuous phase information of second bar is obtained；
According to the continuous phase information of first bar, the first microstrain of first bar is determined；And according to described
The continuous phase information of second bar determines the second microstrain of second bar.
Optionally, the dynamic mechanical measurement method, wherein described according to first optical information and described
Second optical information, it is determining during receiving the impact force respectively, the reflected light through the first position point reflection
Second spot intensity information of the first spot intensity information and the reflected light through the second position point reflection, comprising:
According to first optical information and second optical information, determine during receiving the impact force,
First light intensity data of the reflected light through the first position point reflection and reflected light through the second position point reflection
Second light intensity data；
According to first light intensity data and in advance obtain, when not receiving the impact force, the optical detection
The light intensity data of reflected light through the first position point reflection acquired in device, determines the first spot intensity information；Root
According to second light intensity data and in advance obtain, when not receiving the impact force, acquired in the optical detector
The light intensity data of reflected light through the second position point reflection determines the second spot intensity information.
Optionally, the dynamic mechanical measurement method, wherein the velocity information according to determined by calculates
The dynamic mechanical of the detected materials sample, comprising:
Determine that the second incidence rate at the first bar and the detected materials sample contacts is equal to first incidence rate,
The second reflection speed at first bar and the detected materials sample contacts is equal to the first reflection speed and described
The second transmission speed at second bar and the detected materials sample contacts is equal to the first transmission speed；
According at least two in identified second incidence rate, the second reflection speed and the second transmission speed
It is a, calculate the dynamic mechanical of the detected materials sample.
The embodiment of the present invention also provides a kind of calculating equipment, wherein is applied to described in any item dynamic mechanicals as above
It is capable of measuring device, wherein the calculating equipment includes processor, the processor is used for:
Receive the impact force along axis direction in first bar, first bar by the impact force by it is described to
It surveys material sample and is transmitted to second bar, and wherein an optical outputting system is exported to the first position of first bar
Point two-way orhtogonal linear polarizaiton light, another optical outputting system export to the second position point of second bar two-way just
When intersection polarised light, the optical detector first optical information obtained and second optical information are obtained；
According to first optical information and second optical information, the dynamic mechanical of the detected materials sample is determined
Performance.
At least one of specific embodiment of the invention above-mentioned technical proposal has the advantages that
Dynamic mechanical measuring device described in the embodiment of the present invention, the two-way exported by two optical outputting systems
Orhtogonal linear polarizaiton light realizes the measurement to the dynamic mechanical of detected materials sample, the measurement process not by external stray light,
The influence of the factors such as air flowing and external shock, therefore can guarantee that measurement obtains the accurate of the dynamic mechanical of material
Property.
Detailed description of the invention
Fig. 1 is the partial structure diagram of dynamic mechanical measuring device described in the embodiment of the present invention；
Fig. 2 is the schematic perspective view of dynamic mechanical measuring device described in the embodiment of the present invention；
Fig. 3 is the flow diagram of dynamic mechanical measurement method described in the embodiment of the present invention；
Fig. 4 is the flow diagram of step S320 in dynamic mechanical measurement method described in the embodiment of the present invention.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
For solve the prior art dynamic mechanical measuring device can not precise measurement obtain detected materials dynamic force
The problem of learning performance, the embodiment of the present invention provide a kind of dynamic mechanical measuring device and the measurement method using the device,
Using the principle of heterodyne system optical measurement, dynamic mechanical is carried out to the detected materials sample being located between the first bar and the second bar
Performance measurement can accurately measure the dynamic mechanical for obtaining material.
Specifically, as depicted in figs. 1 and 2, dynamic mechanical measuring device described in the embodiment of the present invention includes:
The first bar 100 and the second bar 200 of coaxial arrangement, wherein detected materials sample 10 can be located in first bar
100 and second between bar 200；
Two optical outputting systems 300, be respectively used to output be in predetermined angle two-way orhtogonal linear polarizaiton light, therein one
The two-way orhtogonal linear polarizaiton light that optical outputting system (the first optical outputting system 310) is exported is incident to the of the first bar 100
One location point 110, and the reflected light after the reflection of first position point 110 is transmitted in the same direction；Another optical outputting system (
Two optical outputting systems 320) the two-way orhtogonal linear polarizaiton light that is exported is incident to the second position point 210 of the second bar 200, and passes through
Reflected light after second position point 210 reflects is transmitted in the same direction；
Optical detector 700, for obtain respectively through first position point 110 reflect reflected light the first optical information with
And the second optical information of the reflected light reflected through second position point 210.
Specifically, the first bar 100 and the second bar 200 of coaxial arrangement are for clamping detected materials sample 10, and the first bar
The incident force pulse of 100 impact force for receiving the axial direction transmission along the first bar 100, which is transmitted to
Detected materials sample 10, and the second bar 200 is transmitted to by detected materials sample 10, form transmission power pulse.It is understood that
It is that the incident force pulse transmitted in the first bar 100, can be through detected materials sample 10 when being transmitted at detected materials sample 10
Reflection forms reflectivity pulse, transmits in the first bar 100.
Dynamic mechanical measuring device described in the embodiment of the present invention is located at coaxial arrangement using detected materials sample 10
Between first bar 100 and the second bar 200, detected materials sample 10 receives the first bar 100 impact force in axial direction, simulation to
Survey stress condition of the material sample 10 under shock loading.
It optionally, should include the first bar 100 and the second bar 200, for simulating detected materials sample in the embodiment of the present invention
The overall structure of 10 stress condition under shock loading is formed as split hopkinson press bar system.
Specifically, as shown in Figure 1, the dynamic mechanical measuring device further include:
Third bar 400 is coaxially disposed with the first bar 100 and the second bar 200, and third bar 400 and the first bar 100 are far from the
One end of two bars 200 abuts；
Guide sleeve 500 is coaxially disposed with the first bar 100 and third bar 400, and is sheathed on third bar 400 and 100 phase of the first bar
The outside of abutted position；
Support base 600, including multiple mounting holes that same center line is arranged, wherein guide sleeve 500, the first bar 100 and second
Bar 200 is slidably arranged in respectively in an at least mounting hole.
Wherein, above-mentioned includes support base 600, the structure of third bar 400, the first bar 100, the second bar 200 and guide sleeve 500
Be formed as split hopkinson press bar system.
Specifically, as shown in Figure 1, guide sleeve 500 is formed as the axle sleeve type structure of boring, one end of third bar 400 is inserted
Set on the inside of guide sleeve 500, and one end far from guide sleeve 500 is exposed to the outside of guide sleeve 500.It is coaxially disposed with third bar 400
The first bar 100 be partly inserted in the inside of guide sleeve 500, abutted with third bar 400, one end far from third bar 400 is towards the
The directions of two bars 200 extends, and is formed as that guide sleeve 500 is sheathed on third bar 400 and the first bar 100 abuts against knot outside position
Structure.Using guide sleeve 500, when guaranteeing that third bar 400 is applied hitting power, third bar 400 is coaxial compared to the first bar 100
Degree avoids generating offset.
In addition, by the way that concentric multiple mounting holes, guide sleeve 500, the first bar 100 and second is arranged in support base 600
Bar 200 is slidably arranged in respectively in an at least mounting hole, for realizing to guide sleeve 500, the first bar 100 and the second bar 200
Support, and guarantee the concentricity that third bar 400, the first bar 100 and the second bar 200 are installed in support base 600.
Based on the above-mentioned split hopkinson press bar system including third bar 400, the first bar 100 and the second bar 200, energy
Enough stress condition of the simulation detected materials sample 10 under shock loading；In addition, dynamic mechanical described in the embodiment of the present invention
Measuring device further exports the two-way orhtogonal linear polarizaiton light in predetermined angle, two-way by two optical outputting systems respectively
Orhtogonal linear polarizaiton light is respectively provided with constant difference on the frequency, and the two-way orhtogonal linear polarizaiton light point that two optical outputting systems are exported
Supplementary biography transports to the first bar and the second bar, according to the optical information of the reflected light at the first bar and the second bar, and utilizes cross line
The constant frequency of polarised light is poor, can analyze the microstrain of the first bar and the second bar, and further obtains detected materials sample
Dynamic mechanical.
Wherein, the optical outputting system of above-mentioned working principle is formed as heterodyne system optical measuring system, therefore the present invention is real
The example dynamic mechanical measuring device is applied, split hopkinson press bar system and heterodyne system optical measuring system are mutually tied
It closes, for realizing the measurement of the dynamic mechanical of detected materials sample, which is not flowed by external stray light, air
And the influence of the factors such as external shock, therefore can guarantee that measurement obtains the accuracy of the dynamic mechanical of material.
In the embodiment of the present invention, optionally, as shown in Fig. 2, each optical outputting system 300 includes:
For exporting the laser 301 of incident beam；
Filter 302 for being filtered to incident beam；
Light conversion element, for the incident beam for passing through filtering processing to be converted to orhtogonal linear polarizaiton light all the way；
Beam splitter, the orhtogonal linear polarizaiton light all the way for that will be exported through light conversion element, is converted in predetermined angle
Two-way orhtogonal linear polarizaiton light.
Wherein, the optical outputting system 300 is moved the incident beam that filter 302 exports by light conversion element
Frequency is handled, and generates the orhtogonal linear polarizaiton light with constant frequency difference.
Optionally, as shown in Fig. 2, the light conversion element includes: two be arranged successively from filter 302 to beam splitter
/ mono- wave plate 303 and quarter-wave plate 304, and the half wave plate 303 around itself center line with preset angular speed
Rotation, the quarter-wave plate are placed in stationary state.
In the light conversion element, it is combined by half wave plate 303 and quarter-wave plate 304, is configured to one
Frequency shifter, to generate the orhtogonal linear polarizaiton light with constant frequency difference.
Therefore, using above-mentioned implementation structure, two optical outputting systems 300 exported per orhtogonal linear polarizaiton light all the way
In, the angular frequency of the linearly polarized light in X direction of orhtogonal linear polarizaiton light and the difference of the angular frequency along the linearly polarized light of Y-direction are
Predeterminated frequency value, namely have constant frequency poor.
Optionally, as shown in Fig. 2, the beam splitter includes:
Amici prism 305, the orhtogonal linear polarizaiton light all the way for being exported light conversion element, is converted to orthogonal
Two-way orhtogonal linear polarizaiton light；
Two reflecting mirrors 306, each reflecting mirror 306 respectively correspond reception orhtogonal linear polarizaiton light all the way, and for reflecting institute
Received orhtogonal linear polarizaiton light is formed so that being in predetermined angle between the orhtogonal linear polarizaiton light reflected through two reflecting mirrors 306
The two-way orhtogonal linear polarizaiton light that optical outputting system 300 is exported.
Specifically, two reflecting mirrors 306 can be oppositely arranged, the two-way orhtogonal linear polarizaiton light that Amici prism 305 is exported
Correspondingly be incident to a wherein reflecting mirror 306 respectively, by two reflecting mirrors 306 respectively to incident orhtogonal linear polarizaiton light into
Row reflection, so that the orhtogonal linear polarizaiton light reflected through two reflecting mirrors 306 is transmitted towards same position point.Wherein, the first optics
The first position point 110 of the reflected light that two reflecting mirrors 306 are reflected in output system 310 towards the first bar 100 transmits, and compares
In symmetrical by the straight line vertical with the first bar 100 of first position point 110, so that anti-after the reflection of first position point 110
Light is penetrated to transmit in the same direction；The reflected light that two reflecting mirrors 306 are reflected in second optical outputting system 320 is towards the second bar
200 second position point 210 transmits, and symmetrical compared to by the straight line vertical with the second bar 200 of second position point 210, with
So that the reflected light after the reflection of second position point 210 is transmitted in the same direction.
Optionally, in the embodiment of the present invention, optical outputting system 300 further includes analyzer 307, for receiving through first
The a little reflected light of 110 reflections and the reflected light reflected through second position point 210 are set, so that incident whole reflected lights is converted to line inclined
Optical detector 700 is transmitted to after vibration light.
It is understood that an analyzer 307 is respectively set for corresponding each optical outputting system 300 and an optics is visited
Device 700 is surveyed, for obtaining the first optical information of the reflected light reflected through first position point 110 respectively and through second position point
Second optical information of the reflected light of 220 reflections.
In the embodiment of the present invention, optionally, first position point 110 is the midpoint of the first bar 100, second position point
210 be the midpoint of the second bar 200, to guarantee the accuracy of dynamic mechanical measurement.
In addition, optionally, optical detector 700 is for obtaining the image of reflected light in the embodiment of the present invention
Imagery optical detector, or the digit optical detector for the spot intensity for obtaining reflected light.
Based on this, when optical detector 700 is imagery optical detector, the first optical information obtained and the second optics
Information is respectively that picture is imaged；When optical detector 700 is digit optical detector, the first optical information obtained and the
Two optical information are the data information for recording the spot intensity of reflected light.
On the other hand the embodiment of the present invention also provides a kind of dynamic mechanical measurement method, the measurement method is using above-mentioned
The dynamic mechanical device for measuring properties for implementing structure, as shown in figure 3, the measurement method includes:
S310 receives impact force in axial direction in first bar, and first bar passes through the impact force
The detected materials sample is transmitted to second bar, and wherein an optical outputting system is exported to the of first bar
The two-way orhtogonal linear polarizaiton light of one location point, another optical outputting system are exported to the second position point of second bar
When two-way orhtogonal linear polarizaiton light, the optical detector first optical information obtained and second optics letter are obtained
Breath；
S320 determines the dynamic of the detected materials sample according to first optical information and second optical information
State mechanical property.
Based on dynamic mechanical measuring device described in the above-mentioned implementation structure of the embodiment of the present invention, by by detected materials
Sample 10 is held between the first bar 100 and the second bar 200, so that the first bar 100 is received the impact force along axis direction, and simultaneously
The first optical outputting system 310 is set to export two-way orhtogonal linear polarizaiton light, the second optics to the first position point 110 of the first bar 100
Output system 320 exports two-way orhtogonal linear polarizaiton light to the second position point 210 of the second bar 200, by acquiring optical detector
700 optical information collected, analyze optical information, can determine the dynamic mechanical of detected materials sample 10.
Specifically, as shown in connection with fig. 2, dynamic force is carried out using dynamic mechanical measuring device described in the embodiment of the present invention
The measurement process for learning performance measurement can be with are as follows:
By detected materials sample 10 with the form coaxial with the second bar 200 with the first bar 100 be located in first bar 100 with
Between second bar 200；
Hit third bar 400 by a hard tool, making third bar 400, v hits the first bar 100 at a predetermined velocity, with to
It is ρ that first bar 100, which applies amplitude,0C0An incident force pulse of v/2；Wherein, C0It is transmitted in the first bar 100 for incident force pulse
Axial velocity, ρ0For the density of the first bar 100；
Wherein, when incident force pulse is transmitted to detected materials sample 10 along the first bar 100, a portion will be anti-
It is emitted back towards the first bar 100 and forms reflectivity pulse, another part is transmitted to the second bar 200 by detected materials sample 10, forms transmission
Power pulse.
In addition, the first optics of optical outputting system 300 exports before hitting third bar 400 by a hard tool
System 310 exports two-way orhtogonal linear polarizaiton light, while the of optical outputting system 300 to the first position point 110 of the first bar 100
Two optical outputting systems 320 export two-way orhtogonal linear polarizaiton light to the second position point 210 of the second bar 200.Specifically, for
One optical outputting system 310 and the second optical outputting system 320, the laser beam that laser 301 exports are filtered through filter 302
After be transmitted on half wave plate 303, optionally the filter 302 also has the function of to expand, can be to the laser passed through
Shu Jinhang is expanded and is filtered.
In addition, as shown in Fig. 2, with the length direction of the first bar 100 and the second bar 200 for the direction x, in the horizontal plane vertically
It is the direction y in the direction in the direction x, is the setting of half wave plate 303 for the direction z perpendicular to the direction in the direction x and the direction y
, can be around center line (being also z-axis) to preset angular velocity omega in the top of the first bar 100 and the second bar 200 ' rotation, it can
The incident laser beam for being incident to half wave plate 303 is converted to the linearly polarized light rotated counterclockwise with 2 ω '.
Further, quarter-wave plate 304 is transmitted to by the linearly polarized light that half wave plate 303 exports, by this
Quarter-wave plate 304 is converted to by the linearly polarized light that half wave plate 303 exports comprising two frequencies, is also along x-axis
+ 2 ω ' of polarization angular frequency in direction and the orhtogonal linear polarizaiton light that polarization angular frequency is ω -2 ω ' along the y-axis direction.
Later, the orhtogonal linear polarizaiton light all the way being emitted by quarter-wave plate 304, is transmitted to Amici prism 305, by being divided
By this, orhtogonal linear polarizaiton light is divided into two-way orhtogonal linear polarizaiton light to prism 305 all the way, optionally the two-way orhtogonal linear polarizaiton light phase
It is mutually vertical, it respectively corresponds and is transmitted to a reflecting mirror 306, by reflecting mirror 306 by corresponding orhtogonal linear polarizaiton optical transport to same
Location point.
Wherein, the reflected light that two reflecting mirrors 306 are reflected in the first optical outputting system 310 towards the first bar 100
The transmission of one location point 110, and the reflected light after the reflection of first position point 110 is transmitted in the same direction, is connect by analyzer 307
It receives, and is interfered on the imaging surface of corresponding optical detector 700, so that forming speckle is optically detected 700 institute of device
Acquisition；Second position point of the reflected light that two reflecting mirrors 306 are reflected in second optical outputting system 320 towards the second bar 200
210 transmission, and the reflected light after the reflection of second position point 210 is transmitted in the same direction, is received by analyzer 307, and in phase
It is interfered on the imaging surface of corresponding optical detector 700, formation speckle is optically detected device 700 and is acquired.
Based on above-mentioned process and mode, it is able to detect that by optical detector 700 when the first bar 100 is received along axis
To the impact force in direction, incident force pulse is transmitted by the first bar 100 to detected materials sample 10, is passed through detected materials sample 10
During transporting to the second bar 200, it is incident to the two-way orhtogonal linear polarizaiton light of the first bar 100 and the second bar 200 respectively in optics
The intensity signal interfered at the imaging surface of detector 700, to be further able to calculate detected materials according to the intensity signal
The dynamic mechanical of sample 10.
Specifically, in conjunction with Fig. 2, Fig. 3 and Fig. 4, in step s 320, according to first optical information and second light
Information is learned, determines the dynamic mechanical of the detected materials sample, comprising:
S321, according to first optical information and second optical information, determination is receiving impact force mistake respectively
Cheng Zhong, the first spot intensity information of the reflected light reflected through first position point 110 and the reflection reflected through second position point 210
Second spot intensity information of light；
S322, according to the first spot intensity information and the second spot intensity information, determination is receiving impact force mistake respectively
Cheng Zhong, the second microstrain of the first microstrain of the first bar 100 and the second bar 200；
S323 determines at least two in following velocity information according to the first microstrain and the second microstrain:
First incidence rate, the first reflection speed and the first transmission speed；
Wherein, the first incidence rate is the speed that the incident force pulse on the first bar 100 is transmitted on the first bar 100, the
One reflection speed is to form reflectivity pulse after the incident force pulse on the first bar 100 is reflected by detected materials sample 10, the
The speed transmitted on one bar 100, the first transmission speed are transmitted to the second bar through detected materials sample 10 for incident force pulse and are formed
Transmitted pulse, the speed transmitted on the second bar 200；
S324 calculates the dynamic mechanical of the detected materials sample according to identified velocity information.
In the embodiment of the present invention, optionally, the dynamic mechanical of detected materials sample includes dynamic stress, dynamic strain
With dynamic strain rate.
Specifically, it in step S321, according to the first optical information and the second optical information, determines receiving punching respectively
Hit during power, through first position point 110 reflect reflected light the first spot intensity information and through the second position point 210
Second spot intensity information of the reflected light of reflection, comprising:
According to first optical information and second optical information, determine during receiving the impact force,
The of first light intensity data of the reflected light reflected through first position point 110 and reflected light through the second position point reflection
Two light intensity datas；
According to first light intensity data and in advance obtain, when not receiving the impact force, the optical detection
The light intensity data of the reflected light reflected acquired in device 700 through first position point 110, determines the first spot intensity information；According to
Second light intensity data and in advance obtain, when not receiving the impact force, through second acquired in optical detector 700
The light intensity data for setting a little reflected light of 210 reflections, determines the second spot intensity information.
Specifically, when optical detector 700 is imagery optical detector, according to optical detector 700 obtained the
One optical information and the second optical information are respectively the imaging picture of reflected light, during the test, by being spaced preset duration
The imaging picture for acquiring optical detector 700 is analyzed imaging picture when can obtain during the test multiple
Between at point, the first spot intensity information of the reflected light reflected through first position point 110 and reflected through second position point 210 anti-
Penetrate the second spot intensity information of light.When optical detector 700 is digit optical detector, pass through 700 energy of optical detector
Enough directly acquire the spot intensity of reflected light.Therefore, during the test, optical detector is obtained by interval preset duration
700 acquisition data can obtain the first spot intensity information of the reflected light reflected through first position point 110 and through second
Second spot intensity information of the reflected light that location point 210 reflects.
In addition, being tried according to the optical transmission process of two-way orhtogonal linear polarizaiton light in optical outputting system 300 to detected materials
Sample 10 is tested, collected through first position point 110 according to optical detector 700 before third bar 400 applies hitting power
The spot intensity information of the reflected light reflected with second position point 210, meets following formula one:
I1(x, y, t)=I0(x,y){1+V cos[Φ0(x,y)+4ω′t]}
Wherein, I1(x, y, t) is the preceding spot intensity information in the t time of test, I0(x, y) is exported sharp by laser
The mean intensity of light light beam, V are the modulation visibility of optical system, Φ0(x, y) is the initial phase of laser beam, and ω ' is two points
One of wave plate around center line default angular speed.Wherein, I0(x, y) can be obtained after testing before testing with V.
Further, the motion principle according to optical transmission principles and the first bar and the second bar when being hit pulse, right
Detected materials sample 10 is tested, and after applying hitting power to third bar 400, is incident to the first bar 100 and the second bar 200
Two-way orhtogonal linear polarizaiton light after reflection, wherein the light path of a branch of orhtogonal linear polarizaiton light will increase Δ y (x, z, t) sini, it is another
The light path of beam orhtogonal linear polarizaiton light will reduce Δ y (x, z, t) sini, then optical detector 700 is collected through first position point
110 and second position point 210 reflect reflected light spot intensity information, meet following formula two:
I2(x, y, t)=I0(x,y){1+V cos[Φ0(x,y)+4ω′t±4πΔy(x,z,t)/λ]}
Wherein, I2(x, y, t) is the spot intensity information in test process in the t time, and Δ y (x, z, t) is the first bar
100 or the second warping function on bar 200, ± indicating microstrain direction on the first bar 100 or the second bar 200, i is cross line
For polarised light in the incidence angle of first position point or second position point, λ exports the wavelength of laser beam by laser.
According to the above, the formula two is expressed as carrying the speckle signals of the first bar 100 or the corresponding microstrain of the second bar 200,
Due to the reflected light reflected in the available test process of optical detector 700 through first position point 110 and second position point 210
Light intensity data obtained, according to preparatory when not receiving the impact force, 700 institute of optical detector in conjunction with formula one
The light intensity data of the reflected light reflected through first position point 110 obtained can obtain and carry the corresponding microstrain of the first bar 100
Speckle signals data, namely obtain the first spot intensity information；It is obtained, according to preparatory when not receiving the impact force, institute
The light intensity data for stating the reflected light reflected acquired in optical detector 700 through second position point 210, can obtain carrying second
The speckle signals data of the corresponding microstrain of bar 200, namely obtain the second spot intensity information.
In the embodiment of the present invention, in step S322, according to the first spot intensity information and second facula information,
It determines during receiving the impact force respectively, the of the first microstrain of first bar 100 and second bar 200
Two microstrains, comprising:
According to the first spot intensity information, demodulation obtains first bar during receiving the impact force
100 truncation phase information；And according to the second spot intensity information, demodulation obtains and is receiving the impact force process
Described in the second bar 200 truncation phase information；
According to the truncation phase information of first bar 100, the continuous phase information of first bar 100 is obtained；And
According to the truncation phase information of second bar 200, the continuous phase information of second bar 200 is obtained；
According to the continuous phase information of first bar 100, the first microstrain of first bar 100 is determined；And root
According to the continuous phase information of second bar 200, the second microstrain of second bar 200 is determined.
Specifically, the first spot intensity information and the second spot intensity information are being obtained, namely is obtaining and carries the first bar 100
After the speckle signals of the corresponding microstrain of the second bar 200, it is able to demodulate by Fourier transformation or wavelet transformation
Phase information is truncated accordingly on one bar 100 and the second bar 200；Later, to the truncation phase information and the second bar of the first bar 100
200 truncation phase information carries out package respectively and handles, and can obtain the continuous phase information and the second bar of the first bar 100
200 continuous phase information.
The continuous phase information of continuous phase information and the second bar 200 based on the first above-mentioned bar 100, be respectively adopted as
Under formula three, can determine the first microstrain of the first bar 100 and the second microstrain of the second bar 200:
Wherein, Δ x (t) be the first bar 100 the first microstrain or be the second bar 200 the second microstrain, ΔΦ (t)
For corresponding first bar 100 continuous phase information or be the second bar 200 continuous phase information.
Second microstrain of the first microstrain of the first bar 100 and the second bar 200 based on determined by formula 3, further
Ground carries out differential process, can obtain and hit the first bar 100 in v at a predetermined velocity, and applying amplitude to the first bar 100 is ρ0C0Under conditions of the incident force pulse of v/2, the velocity information of the first bar 100 and the second bar 200.
Specifically, by above-mentioned mode, the first incidence rate, the first reflection speed and the first transmission speed can be obtained
Degree；
Wherein, the first incidence rate is first position point 110 of the incident force pulse on the first bar 100 in the first bar 100
The transmission speed at place, the first reflection speed are to be formed after the incident force pulse on the first bar 100 is reflected by detected materials sample 10
Reflectivity pulse, the transmission speed at the first position point 110 of the first bar 100, the first transmission speed are incident force pulse warp
Detected materials sample 10 is transmitted to the second bar 200 and forms transmitted pulse, the transmission at the second position point 210 of the second bar 200
Speed.
Based on above-mentioned identified velocity information, calculated described to be measured in step S324 according to identified velocity information
The dynamic mechanical of material sample, comprising:
Determine that the second incidence rate of the first bar 100 and 10 contact position of detected materials sample is equal to the first incidence rate, the
Second reflection speed of one bar 100 and 10 contact position of detected materials sample be equal to the first reflection speed and the second bar 200 with to
The the second transmission speed for surveying 10 contact position of material sample is equal to the first transmission speed；
According at least two in identified second incidence rate, the second reflection speed and the second transmission speed
It is a, calculate the dynamic mechanical of institute's detected materials sample 10.
It is understood that under the premise of one-dimension stress wane assumes in meeting bar, the dynamic stress of detected materials sample 10
σa(t), dynamic strain εa(t), dynamic strain rateIt formula four to formula six can calculate as follows:
Wherein, A0For the first bar or the cross-sectional area of the second bar, ASFor the cross-sectional area of detected materials sample 10, LSFor to
Survey the length of material sample 10, σ1(S1, t) and it is impulsive force of first bar to detected materials sample 10, σ2(S2, t) and it is the second bar pair
The impulsive force of detected materials sample 10, vI(S1, t) be the first bar and 10 contact position of detected materials sample incidence rate, be also
Second incidence rate, vR(S1, t) be the first bar and 10 contact position of detected materials sample reflection speed, also the as second reflection is fast
Degree, vT(S2, t) be the second bar and 10 contact position of detected materials sample transmission speed, also as second transmit speed.
Therefore, according to the principle of the above dynamic mechanical, according to the second above-mentioned incidence rate, the second reflection speed and second
Speed is transmitted, can determine the dynamic stress, dynamic strain and dynamic strain rate of detected materials sample 10.
Due to reflectivity pulse, transmission power pulse respectively to the first bar, the second bar propagate process, stress wave also to
Survey 10 internal interface of material sample constantly roundtrip propagation.It is uniformly distributed according to sample stress/strain short in bar it is assumed that wait measure and monitor the growth of standing timber
Expect sample 10 axial stress and strain by cracking homogenization, then between each stress and strain between relationship meet following formula
Seven and formula eight relational expression:
εI(S1,t)+εR(S1, t) and=εT(S2, t) and formula seven
σI(S1,t)+σR(S1, t) and=σT(S2, t) and formula eight
Wherein, εI(S1, t) and it is incident strain, εR(S1, t) and it is reflection strain, εT(S2, t) and it is transmission strain；σI(S1, t) be
Incident stress, εR(S1, t) and it is reflection stress, σT(S2, t) and it is transmission stress.
Similarly, the relationship between speed meets the relational expression of following formula nine:
vI(S1,t)+vR(S1, t) and=vT(S2, t) and formula nine
Wherein, vI(S1, t) and it is incidence rate, vR(S1, t) and it is reflection speed, vT(S2, t) and it is transmission speed.
Because meeting following relational expression ten to 13 between stress, particle velocity and strain three in the elastic region of bar:
σ1(S1, t) and=σI(S1,t)+σR(S1, t) and=E [εI(S1,t)+εR(S1, t)] formula ten
σ2(S2, t) and=σT(S2, t) and=E εT(S2, t) and formula 11
v1(S1, t) and=vI(S1,t)+vR(S1, t) and=C0[εI(S1,t)-εR(S1, t)] formula 12
v2(S2, t) and=vT(S2, t) and=C0εT(S2, t) and formula 13
Here, E is the elasticity modulus of bar.Wherein, σ1(S1, t) and it is on the first bar and at 10 contact position of detected materials sample
Stress, v1(S1, t) be the first bar on the speed at 10 contact position of detected materials sample；σ2(S2, t) be the second bar on
Stress at 10 contact position of detected materials sample, v2(S2, t) and it is on the second bar and at 10 contact position of detected materials sample
Speed.
According to formula ten to formula 13, v1(S1, t) and v2(S2, t) respectively with εI(S1,t)、εR(S1,t)、εT(S2,t)
Furthermore correlation combines elastic wave to remain in bar and propagate distortionless characteristic under elastic stage, can know on the first bar it
In impulsive force transmission speed at a position be equal to the incidence rate v of the first bar and 10 contact position of detected materials sampleI(S1, t),
Impulsive force reflection speed on first bar wherein at a position is equal to the reflection speed of the first bar and 10 contact position of detected materials sample
Spend vR(S1, t), the transmission power pulse transmission speed on the second bar wherein at a position is equal to the second bar and detected materials sample 10
The transmission speed v of contact positionT(S2,t)。
Therefore, when determining first incidence rate and of first bar at the point of first position according to formula one to formula three
One reflection speed and the second bar, according to formula four and formula six, determine first after the first transmission speed of the second place
The second incidence rate at bar and detected materials sample contacts is equal to the first incidence rate, the first bar and detected materials sample contacts
The second reflection speed at place is equal to the second transmission speed at the first reflection speed and the second bar and detected materials sample contacts
It, then can be according to identified second incidence rate, the second reflection speed and described second when equal to the first transmission speed
At least two in speed are transmitted, the dynamic mechanical of the detected materials sample is calculated.
That is, can determine the dynamic mechanical of detected materials sample according to following relational expression 14 to 16:
Wherein,WithIt is to measure the first obtained incidence rate, first instead respectively
Firing rate degree and the first transmission speed.
Therefore, the first above-mentioned incidence rate, the first reflection speed and the first transmission are obtained according to the above, ought measure respectively
When speed, then the dynamic mechanical of detected materials sample can be obtained.In addition, according to formula nine, using the first incidence rate,
Corresponding relationship between first reflection speed and the first transmission speed, when knowing the first incidence rate, the first reflection speed and the
One transmission speed in any two when, can also determine the dynamic mechanical of detected materials sample.
The dynamic mechanical measuring device according to embodiments of the present invention, by split hopkinson press bar system and outside
Differential optical measuring system combines, and the two-way orhtogonal linear polarizaiton light exported by optical outputting system is realized to detected materials
The measurement of the dynamic mechanical of sample, the measurement process is not by factors such as external stray light, air flowing and external shocks
Influence, therefore can guarantee measurement obtain material dynamic mechanical accuracy.
The embodiment of the present invention also provides a kind of calculating equipment, is applied to as above described in any item dynamic mechanical measurements
Device, wherein the calculating device handler, the processor are used for:
Receive the impact force along axis direction in first bar, first bar by the impact force by it is described to
It surveys material sample and is transmitted to second bar, and wherein an optical outputting system is exported to the first position of first bar
Point two-way orhtogonal linear polarizaiton light, another optical outputting system export to the second position point of second bar two-way just
When intersection polarised light, the optical detector first optical information obtained and second optical information are obtained；
According to first optical information and second optical information, the dynamic mechanical of the detected materials sample is determined
Performance.
Optionally, the processor determines described to be measured according to first optical information and second optical information
The dynamic mechanical of material sample, comprising:
According to first optical information and second optical information, determination is receiving the impact force process respectively
In, the first spot intensity information of the reflected light through the first position point reflection and the reflection through the second position point reflection
Second spot intensity information of light；
According to the first spot intensity information and the second spot intensity information, determination is receiving the punching respectively
It hits during power, the second microstrain of the first microstrain of first bar and second bar；
According to first microstrain and second microstrain, at least two in following velocity information are determined:
First incidence rate, the first reflection speed and the first transmission speed；
Wherein, first incidence rate is the incident force pulse on first bar in the first position of first bar
Transmission speed at point, the first reflection speed are that the incident force pulse on first bar is anti-by the detected materials sample
Reflectivity pulse is formed after penetrating, the transmission speed at the first position point of first bar, the first transmission speed is institute
It states incident force pulse and is transmitted to the second bar formation transmitted pulse through the detected materials sample, the second of second bar
Transmission speed at location point；
According to identified velocity information, the dynamic mechanical of the detected materials sample is calculated.
Optionally, the dynamic mechanical includes dynamic stress, dynamic strain and dynamic strain rate.
Optionally, the processor determines respectively according to the first spot intensity information and second facula information
During receiving the impact force, the second microstrain of the first microstrain of first bar and second bar, comprising:
According to the first spot intensity information, demodulation obtains first bar during receiving the impact force
Phase information is truncated；And according to the second spot intensity information, demodulation obtains institute during receiving the impact force
State the truncation phase information of the second bar；
According to the truncation phase information of first bar, the continuous phase information of first bar is obtained；And according to institute
The truncation phase information of the second bar is stated, the continuous phase information of second bar is obtained；
According to the continuous phase information of first bar, the first microstrain of first bar is determined；And according to described
The continuous phase information of second bar determines the second microstrain of second bar.
Optionally, the processor is according to first optical information and second optical information, and determination is connecing respectively
During receiving the impact force, the first spot intensity information of the reflected light through the first position point reflection and through described
Second spot intensity information of the reflected light of two position point reflections, comprising:
According to first optical information and second optical information, determine during receiving the impact force,
First light intensity data of the reflected light through the first position point reflection and reflected light through the second position point reflection
Second light intensity data；
According to first light intensity data and in advance obtain, when not receiving the impact force, the optical detection
The light intensity data of reflected light through the first position point reflection acquired in device, determines the first spot intensity information；Root
According to second light intensity data and in advance obtain, when not receiving the impact force, acquired in the optical detector
The light intensity data of reflected light through the second position point reflection determines the second spot intensity information.
Optionally, the processor calculates the dynamic mechanical of the detected materials sample according to identified velocity information
Performance, comprising:
Determine that the second incidence rate at the first bar and the detected materials sample contacts is equal to first incidence rate,
The second reflection speed at first bar and the detected materials sample contacts is equal to the first reflection speed and described
The second transmission speed at second bar and the detected materials sample contacts is equal to the first transmission speed；
According at least two in identified second incidence rate, the second reflection speed and the second transmission speed
It is a, calculate the dynamic mechanical of the detected materials sample.
Above-described is the preferred embodiment of the present invention, it should be pointed out that the ordinary person of the art is come
It says, under the premise of not departing from principle of the present invention, can also make several improvements and retouch, these improvements and modifications should also regard
For protection scope of the present invention.
Claims (14)
1. a kind of dynamic mechanical measuring device characterized by comprising
The first bar and the second bar of coaxial arrangement, wherein detected materials sample can be located in first bar and described second
Between bar；
Two optical outputting systems, are respectively used to the two-way orhtogonal linear polarizaiton light that output is in predetermined angle, and an optics therein is defeated
The two-way orhtogonal linear polarizaiton light that system is exported out is incident to the first position point of first bar, and through the first position point
Reflected light after reflection is transmitted in the same direction；The two-way orhtogonal linear polarizaiton light that another optical outputting system is exported is incident to institute
The second position point of the second bar is stated, and the reflected light after the second position point reflection is transmitted in the same direction；
Optical detector, for obtaining the first optical information of the reflected light through the first position point reflection respectively and through institute
State the second optical information of the reflected light of second position point reflection.
2. dynamic mechanical measuring device according to claim 1, which is characterized in that the dynamic mechanical measurement
Device further include:
Third bar is coaxially disposed with first bar and second bar, and the third bar and first bar are far from described
One end of second bar abuts；
Guide sleeve is coaxially disposed with the third bar and first bar, and the guide sleeve is sheathed on the third bar and described the
One bar abuts against the outside of position；
Support base, including multiple mounting holes that same center line is arranged, wherein the guide sleeve, first bar and second bar
It is slidably arranged in an at least mounting hole respectively.
3. dynamic mechanical measuring device according to claim 1, which is characterized in that each optical outputting system
Include:
For exporting the laser of incident beam；
Filter for being filtered to the incident beam；
Light conversion element, for the incident beam for passing through filtering processing to be converted to orhtogonal linear polarizaiton light all the way；
Beam splitter, the orhtogonal linear polarizaiton light all the way for will be exported through the light conversion element are converted in described default
The two-way orhtogonal linear polarizaiton light of angle.
4. dynamic mechanical measuring device according to claim 3, which is characterized in that the light conversion element includes:
The half wave plate and quarter-wave plate being arranged successively from the filter to the beam splitter, wherein described two/
One wave plate is rotated around the center line of itself with default angular speed.
5. dynamic mechanical measuring device according to claim 3, which is characterized in that the beam splitter includes:
Amici prism, the orhtogonal linear polarizaiton light all the way for being exported the light conversion element, is converted to orthogonal two
Road orhtogonal linear polarizaiton light；
Two reflecting mirrors, each reflecting mirror respectively correspond reception orhtogonal linear polarizaiton light all the way, and received for reflecting
Orhtogonal linear polarizaiton light is formed so that being in the predetermined angle between the orhtogonal linear polarizaiton light reflected through two reflecting mirrors
The two-way orhtogonal linear polarizaiton light that the optical outputting system is exported.
6. dynamic mechanical measuring device according to claim 1, which is characterized in that two optical outputting systems
Exported per orhtogonal linear polarizaiton light all the way in, the angular frequency of the linearly polarized light in X direction of the orhtogonal linear polarizaiton light with along Y
The difference of the angular frequency of the linearly polarized light in direction is predeterminated frequency value.
7. dynamic mechanical measuring device according to claim 1, which is characterized in that the optical detector be for
Obtain the imagery optical detector of the image of reflected light, or the digit optical for the spot intensity for obtaining reflected light
Detector.
8. a kind of dynamic mechanical measurement method, which is characterized in that the measurement method is using any one of claim 1 to 7
The dynamic mechanical measuring device, wherein the measurement method includes:
The impact force along axis direction is received in first bar, first bar is by the impact force by described wait measure and monitor the growth of standing timber
Material sample is transmitted to second bar, and wherein an optical outputting system is exported to the first position point of first bar
Two-way orhtogonal linear polarizaiton light, another optical outputting system are exported to the two-way cross line of the second position point of second bar
When polarised light, the optical detector first optical information obtained and second optical information are obtained；
According to first optical information and second optical information, the dynamic mechanical of the detected materials sample is determined
Energy.
9. dynamic mechanical measurement method according to claim 8, which is characterized in that described according to first optics
Information and second optical information, determine the dynamic mechanical of the detected materials sample, comprising:
According to first optical information and second optical information, determine during receiving the impact force respectively,
First spot intensity information of the reflected light through the first position point reflection and reflected light through the second position point reflection
The second spot intensity information；
According to the first spot intensity information and the second spot intensity information, determination is receiving the impact force respectively
In the process, the second microstrain of the first microstrain of first bar and second bar；
According to first microstrain and second microstrain, at least two in following velocity information are determined:
First incidence rate, the first reflection speed and the first transmission speed；
Wherein, first incidence rate is first position Dian Chu of the incident force pulse on first bar in first bar
Transmission speed, it is described first reflection speed be first bar on incident force pulse by the detected materials sample reflection after
Reflectivity pulse, the transmission speed at the first position point of first bar are formed, the first transmission speed enters for described in
It penetrates power pulse and is transmitted to the second bar formation transmitted pulse through the detected materials sample, in the second position of second bar
Transmission speed at point；
According to identified velocity information, the dynamic mechanical of the detected materials sample is calculated.
10. dynamic mechanical measurement method according to claim 8 or claim 9, which is characterized in that the dynamic mechanical
Including dynamic stress, dynamic strain and dynamic strain rate.
11. dynamic mechanical measurement method according to claim 9, which is characterized in that described according to first light
Spot strength information and second facula information determine during receiving the impact force respectively, the of first bar
Second microstrain of one microstrain and second bar, comprising:
According to the first spot intensity information, demodulation obtains the truncation of first bar during receiving the impact force
Phase information；And according to the second spot intensity information, demodulation is obtained described the during receiving the impact force
The truncation phase information of two bars；
According to the truncation phase information of first bar, the continuous phase information of first bar is obtained；And according to described
The truncation phase information of two bars obtains the continuous phase information of second bar；
According to the continuous phase information of first bar, the first microstrain of first bar is determined；And according to described second
The continuous phase information of bar determines the second microstrain of second bar.
12. dynamic mechanical measurement method according to claim 9, which is characterized in that described according to first light
Information and second optical information are learned, is determined during receiving the impact force respectively, it is anti-through the first position point
Second spot intensity information of the first spot intensity information of the reflected light penetrated and the reflected light through the second position point reflection,
Include:
According to first optical information and second optical information, determine during receiving the impact force, through institute
State the reflected light of first position point reflection the first light intensity data and the reflected light through the second position point reflection second
Light intensity data；
According to first light intensity data and in advance obtain, when not receiving the impact force, the optical detector institute
The light intensity data of the reflected light through the first position point reflection obtained, determines the first spot intensity information；According to institute
It states the second light intensity data and obtains in advance, when not receiving the impact force, through institute acquired in the optical detector
The light intensity data for stating the reflected light of second position point reflection determines the second spot intensity information.
13. dynamic mechanical measurement method according to claim 9, which is characterized in that the speed according to determined by
Information is spent, the dynamic mechanical of the detected materials sample is calculated, comprising:
Determine that the second incidence rate at the first bar and the detected materials sample contacts is equal to first incidence rate, it is described
The second reflection speed at first bar and the detected materials sample contacts is equal to the first reflection speed and described second
The second transmission speed at bar and the detected materials sample contacts is equal to the first transmission speed；
At least two in speed are transmitted according to identified second incidence rate, the second reflection speed and described second,
Calculate the dynamic mechanical of the detected materials sample.
14. a kind of calculating equipment, which is characterized in that be applied to the described in any item dynamic mechanical measurements of claim 1 to 7
Device, wherein the calculating equipment includes processor, the processor is used for:
The impact force along axis direction is received in first bar, first bar is by the impact force by described wait measure and monitor the growth of standing timber
Material sample is transmitted to second bar, and wherein an optical outputting system is exported to the first position point of first bar
Two-way orhtogonal linear polarizaiton light, another optical outputting system are exported to the two-way cross line of the second position point of second bar
When polarised light, the optical detector first optical information obtained and second optical information are obtained；
According to first optical information and second optical information, the dynamic mechanical of the detected materials sample is determined
Energy.
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| CN113552010A (en) * | 2020-04-23 | 2021-10-26 | 中国航发商用航空发动机有限责任公司 | Method for calculating pulsating pressure load equivalent to vibration acceleration load |
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