WO2018068338A1 - Tester for micromechanical properties of biological soft tissue - Google Patents
Tester for micromechanical properties of biological soft tissue Download PDFInfo
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- WO2018068338A1 WO2018068338A1 PCT/CN2016/102403 CN2016102403W WO2018068338A1 WO 2018068338 A1 WO2018068338 A1 WO 2018068338A1 CN 2016102403 W CN2016102403 W CN 2016102403W WO 2018068338 A1 WO2018068338 A1 WO 2018068338A1
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- platform
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/064—Special adaptations of indicating or recording means with hydraulic indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0611—Hydraulic or pneumatic indicating, recording or sensing means
Definitions
- the invention relates to the field of biomechanics of soft tissues, in particular to a biosoft tissue micromechanical property tester.
- the biomechanical study of soft tissue covers a very broad range, including almost all tissue systems except the bones in the human body. These tissue systems specifically include skin, cartilage, connective tissue, muscles, and internal organs.
- the broad range of biological soft tissue studies requires a complete mechanical performance test including compression, stretching, torsion, shearing, indentation, and fatigue testing.
- Soft tissue research A major goal of soft tissue research is to characterize the mechanical properties of biological tissues to better design computational models that better understand various medical conditions, such as internal organ damage and traumatic brain injury during motor vehicle accidents. Changes in the properties of materials in the brain, etc. Soft tissue research also analyzes the material behavior of biological tissues under different mechanical loads in human body, such as the effect of mechanical load on fiber structure adjustment. As data is provided for better computational models, this information is essential for the development of biological tissue engineering that is compatible with the mechanical properties and structure of the native tissue.
- the mechanical properties of biological tissues are important in the research and development of tissue engineering and medical devices.
- Current major biomechanical properties testing includes extrusion testing, tensile testing, and shear testing.
- extrusion testing and tensile testing are the main test methods. Among them, the extrusion test has lower requirements for biological tissue fixation, flexible testing and wide application.
- test instruments for the mechanical properties of biological tissues are Bose 5500 series, Instron 5900, CSM bioindenter series, TestResource 100 series, although the basic functions of the products can be tested.
- an object of the present invention is to provide a biosoft tissue micromechanical property tester capable of testing micro-miniature forces and micro-displacements.
- the biosoft tissue micromechanical property tester of the present invention comprises a support, and the support is provided
- a sample test stand a pressure test head facing the sample test stand, and a drive mechanism driving the pressure test head toward/toward the sample test stand;
- a micro force test assembly comprising a first conduit, a first piston movably coupled to the first conduit and supporting the sample test station, a second conduit, a second piston operatively coupled to the second conduit And an amplifying pressure platform connected to the second piston and a force sensor for performing force test on the amplifying pressure platform, wherein the first conduit and the second conduit are connected by a hose, and the cross-sectional area of the sample testing platform is smaller than that of the amplifying pressure platform Cross-sectional area.
- the support further includes a micro-displacement measuring assembly including a lever that moves with one end of the pressure test head, a support rod of the support lever, and a displacement test slide that is moved by the lever and a displacement sensor for performing a displacement test on the displacement test slider, wherein a distance between the end of the lever that moves with the pressure test head and the strut is smaller than a distance between the displacement test slug and the strut .
- the micro-displacement measuring assembly further includes a rail slot defining a linear movement of the displacement test slider, the lever is provided with a sliding slot along a length thereof, and one end of the displacement test slider and the sliding slot The sliding connection and the other end are slidably connected to the rail groove.
- the lever is further provided with an adjusting groove along a length thereof, and an end of the strut is rotatably connected to the adjusting groove.
- the driving structure is a linear motor, and an output end of the linear motor is connected to the pressure testing head through a connecting rod.
- lever is connected to the connecting rod with the end of the pressure test head moving.
- the distance between the force sensor and the amplification pressure table can be adjusted.
- a hydraulic port is disposed on a bottom of each of the first conduit and the second conduit, and two ends of the hose are respectively connected to the two hydraulic ports.
- the XYZ mobile platform supporting the first conduit is further disposed on the support, the XYZ mobile platform includes an X mobile platform connected to the support, and an XY mobile platform slidably connected to the X mobile platform.
- a Y mobile platform sliding along the XY mobile platform, a Z platform bottom plate connected to the Y mobile platform, a first Z-direction platform vertically connected to the Z platform bottom plate, a second Z-direction platform sliding longitudinally along the first Z-direction platform, and a first a Z-platform top plate connected to the first conduit and connected to the first conduit, further comprising a first driving component for driving the XY mobile platform to move in the X direction on the X mobile platform, and driving the Y mobile platform on the XY mobile platform A second drive assembly that moves in the Y direction drives a third drive assembly that moves the second Z-direction platform in the Z-direction on the first Z-direction platform.
- the first driving component includes a first spiral bracket connected to the X moving platform, a first stopper connected to the XY moving platform, and the first spiral barrel bracket can be connected to the first a first screw abutting the stopper, a first threaded tube screwed to the first screw and connected to the first screw holder, and a first spiral barrel screwed to the end of the first screw;
- the second drive assembly includes a second screw bracket connected to the XY moving platform, a second stopper connected to the Y moving platform, a second screw disposed on the second spiral bracket and capable of abutting the second stopper, and a second Screw screwed and second screw a second threaded tube connected to the drum holder, a second spiral barrel screwed to the second screw end;
- the third driving assembly includes a knob bracket connected to the Z platform bottom plate, and the second Z-direction platform a third screw that is rotatably coupled to the knob bracket, a third screw barrel bracket that is coupled to the second Z-direction platform, and
- the present invention has at least the following advantages:
- micro-displacement is amplified by the principle of lever amplification, so that the micro-deformation of the biological soft tissue can be tested;
- the XYZ mobile platform has high adjustment accuracy and can accurately adjust the initial position of the sample test bench.
- Figure 1 is a schematic view of the structure of the present invention
- FIG. 2 is a schematic perspective view showing the XYZ mobile platform of the present invention.
- Fig. 3 is a schematic structural view of a knob of the present invention.
- a biosoft tissue micro-mechanical characteristic tester includes a support, and the support comprises a horizontal bottom plate 11 and a vertical plate 12 vertically connected to the bottom plate 11, and the bottom plate
- An XYZ moving platform 50 is disposed on the XYZ moving platform 50.
- the first duct 31 is movably connected with a first piston 32 slidable relative to the longitudinal direction thereof.
- the first piston 32 is connected with a sample testing table 21 through The first piston 32 supports the sample test table 21; the bottom plate 11 is further provided with a second conduit 33, the second conduit 33 is movably connected with a second piston 34 slidable relative to the longitudinal direction thereof, and the second piston 34 is connected with an amplifying pressure table 35
- the second piston 34 supports the amplifying pressure platform 35; the bottom of the first conduit 31 and the second conduit 33 are respectively provided with a hydraulic port 37, and the two hydraulic ports 37 are connected through the hose to connect the first conduit 31 with the second conduit 33.
- the vertical plate 12 is provided with a linear motor 23, the linear motor 23 is connected to a connecting rod 24, the connecting rod is connected to a pressure test head 22, the end of the pressure test head 22 is facing the sample test stand 21; and the riser 12 is also provided with Can be connected to the amplification pressure table 35
- the force sensor 36 In the present invention, the first duct 31, the first piston 32, the second duct 33, the second piston 34, the amplifying pressure table 35, and the force sensor 36 for stress testing the amplifying pressure table 35 constitute a micro force test assembly for biological soft tissue. That is, the hydraulic force amplification principle is used to amplify the minute force, thereby testing the micro-miniature force of the biological soft tissue. In order to enable hydraulic amplification, the cross-sectional area of the sample test stand 21 in the present invention is smaller than the cross-sectional area of the magnifying pressure table 35.
- the sample test stand 21 When the small force of the sample is measured, the sample is placed on the sample test stand 21, and after the linear motor 23 drives the pressure test head 22 to press the sample, the sample test stand 21 is pressed to pressurize the first piston 32 to generate a pressure. Since the first conduit 31 communicates with the second conduit 33, the pressure is transmitted to the second piston 34 by the liquid, and the liquid is at the same pressure because the cross-sectional area of the amplification pressure table 35 is larger than the cross-sectional area of the sample test table 21, and the corresponding conduction pressure Being amplified, that is, by amplifying the pressure table 35, the pressure received by the sample is performed. Zooming in; since the force sensor 36 is in contact with the amplifying pressure table 35, the force sensor 36 measures the pressure received by the amplifying pressure table 35, and after conversion, the pressure received by the sample is obtained, thereby detecting the mechanical properties of the sample.
- the distance between the force sensor 36 and the amplifying pressure table 35 can be adjusted in the present invention, by adjusting the position of the force sensor 36, The force sensor 26 is brought into contact with the amplification pressure stage 35.
- the force sensor 36 is mounted on the force sensor fixing plate 13, and a waist groove 14 is formed on the vertical plate 12, and the force sensor fixing plate 13 is mounted on the riser 12 through the waist groove 14 by bolts, thereby The position of the force sensor fixing plate 13 on the riser 12 can be adjusted, so that the adjustment force sensor 26 comes into contact with the amplification pressure table 35.
- the link 24 connected to the pressure test head 22 is further connected with a lever 41.
- One end of the lever 41 is connected to the connecting rod 24, and the other end is suspended, and a strut 42 is disposed on the riser 12, and the strut 42 is provided.
- Rotatingly connected with the lever 41 for supporting the lever 41 one end of the lever 41 can be moved with the pressure test head 22; the lever 41 is also rotatably connected with the displacement test slide 43 and is provided with a positive displacement test slide on the riser 12
- the displacement sensor 44 of the plug 43 measures the displacement of the displacement test slider 43.
- the lever 41, the strut 42, the displacement test slider 43, and the displacement sensor 44 for performing displacement test on the displacement test slider constitute a micro-displacement measuring component, that is, the micro-displacement is amplified by the principle of lever amplification, thereby applying biological soft tissue The tiny deformations are tested.
- the distance between the end of the lever 41 that moves with the pressure test head 22 and the strut 42 in the present invention is smaller than the distance between the displacement test spool 43 and the strut 42.
- the present invention further provides a rail groove 45 for linearly sliding the displacement test slider 43 on the riser, and the rail groove 45 is longitudinally disposed. Since the lever 41 is rotated by the pressure test head 22 around the support rod 41, and the end of the lever 41 is longitudinally moved with the pressure test head 22, the displacement test slide 43 is moved longitudinally along the guide rail groove 45 by the lever 41.
- the present invention is provided with a sliding groove along the longitudinal direction of the lever 41, and one end of the displacement test sliding plug 43 is slidably connected with the sliding groove, and the other end is slidably connected with the guiding groove 45.
- An adjustment groove is further provided on the lever 41 along its length to rotationally connect the end of the strut 42 with the adjustment groove.
- the sample When measuring the small displacement of the sample, the sample is placed on the sample test stand 21, and after the linear motor 23 drives the pressure test head 22 to press the sample, the longitudinal movement of the pressure test head 22 drives the lever 41 to rotate, so that the displacement test slider 43 Moving along the rail groove 45, the distance between the end of the lever 41 moving with the pressure test head 22 and the strut 42 is smaller than the distance between the displacement test spool 43 and the strut 42, and therefore, the displacement test spool 43 is moved.
- the displacement is greater than the distance moved by the pressure test head 22, thereby amplifying the small displacement of the pressure test head 22, and the amplified displacement is measured by the displacement sensor 44. After conversion, the small deformation amount of the sample can be obtained, thereby detecting the mechanics of the sample. characteristic.
- the initial position of the sample test station 21 in the present invention is adjusted by the XYZ moving platform 50.
- the XYZ mobile platform 50 includes an X mobile platform 51 connected to the bottom plate 11, an XY moving platform 52 slidably connected to the X moving platform 51, a Y moving platform 53 sliding along the XY moving platform 52, and a Y moving platform 53.
- the 31-connected Z-platform top plate 57 further includes a first drive assembly that drives the XY moving platform 52 to move in the X-direction on the X-moving platform 51, and a second drive that drives the Y-moving platform 53 to move in the Y-direction on the XY moving platform 52.
- the assembly drives a third drive assembly that moves the second Z-direction platform 56 in the Z-direction on the first Z-direction platform 55.
- the first driving component includes a first spiral bracket 61 connected to the X moving platform 51, a first stopper 62 connected to the XY moving platform 52, a first screw 63 disposed on the first spiral cylinder bracket 61 and capable of abutting against the first gear 62, and the first screw 63 and the first spiral cylinder a first threaded tube 64 connected to the bracket 61, a first spiral barrel 65 screwed to the end of the first screw 63;
- the second driving assembly includes a second spiral barrel bracket connected to the XY moving platform 52, and connected to the Y moving platform 53 a second stopper, a second screw 73 disposed on the second spiral cylinder bracket to be abutted against the second stopper, a second threaded tube screwed to the second screw 73 and connected to the second spiral cylinder bracket, and a second screw barrel 75 screwed to the second screw end;
- the third drive assembly includes a knob bracket 81 coupled to the Z platform bottom plate 54, a knob 82 rotatably coupled
- the first knob arm 93 and the second knob arm 94 are connected to the outer circumference of the knob ring 92.
- the first knob arm 93 and the first knob arm The ends of the two knob arms 94 are respectively provided with contacts facing the knob bracket 81 and the third screw 84, and the knob 82 is rotatably connected to the second Z-direction platform 56 through the knob lever 91.
- the present invention is on the XY moving platform 52.
- a sliding slot is respectively disposed on the upper and lower surfaces, and the two sliding slots are orthogonally arranged, and a slider 58 is disposed between the XY moving platform 52 and the X moving platform 51, and between the Y moving platform 53 and the XY moving platform 52;
- a longitudinal chute is also provided on the deck of the first Z-direction platform 55 toward the second Z-direction platform 56, and a slider 58 is disposed between the first Z-direction platform 55 and the second Z-direction platform 56.
- the horizontal position and the longitudinal height of the top plate 87 of the Z platform can be adjusted.
- the first spiral cylinder 65 is rotated to drive the first threaded tube 64 to rotate, so that the first The screw 63 moves toward the first stopper 62 and abuts against the first stopper 62, and is resisted by the first stopper 62.
- the XY moving platform 52 moves in the X direction on the X moving platform 51, thereby driving the Z platform top plate 57 along the X.
- the second spiral barrel 75 is rotated to drive the second threaded tube to rotate, so that the second screw 73 moves toward the second stopper and abuts against the second stopper, and is resisted by the second stopper, and the Y movement platform 53 moves in the Y direction on the XY moving platform 52, thereby driving the Z platform top plate 57 to move in the Y direction; rotating the third spiral barrel 86 to drive the third threaded tube 85 to rotate, so that the third screw 84 moves toward the knob 82, and The contact 95 on the first knob arm 93 of the knob 82 is in contact, and under the action of the third screw 84, the knob 82 is rotated around the knob lever 91, so that the contact 95 on the second knob arm 94 is in contact with the knob bracket 81.
- the second Z-direction platform 56 moves in the Z direction on the first Z-direction platform 55, thereby driving the Z-platform top plate 57 to move in the Z direction, that is, the initial position adjustment of the sample testing table 21 is realized.
- the invention utilizes the screw to adjust the spatial position of the top plate of the Z platform, and the adjustment precision is high, and the micro adjustment can be realized.
- the data acquisition and processing integrated application programming interface is performed, and the force and displacement signals of the test acquisition can be displayed in real time, and numerical analysis and processing are performed for different material models.
- the data acquisition board adopts PCI-1706 to realize the synchronous acquisition of force and displacement signals.
- the post-processing uses the high elasticity model to analyze and interpolate the signals to realize the integrated integration of data acquisition and processing.
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Abstract
A tester for micromechanical properties of a biological soft tissue, comprising: a support, the support being provided thereon with a sample test platform (21), a pressure test head (22) facing the sample test platform (21) and a drive mechanism driving the pressure test head (22) to move towards/away from the sample test platform (21); a miniature force testing assembly, the miniature force testing assembly comprising a first conduit (31), a first piston (32) actively connected to the first conduit (31) and supporting the sample test platform (21), a second conduit (33), a second piston (34) actively connected to the second conduit (33), a pressure-amplifying platform (35) connected to the second piston (34), and a force sensor (36) for testing the force of the pressure-amplifying platform (35), the first conduit (31) and the second conduit (33) being connected by means of a hose, and the cross-sectional area of the sample test platform (21) being smaller than the cross-sectional area of the pressure-amplifying platform (35). A micro force is amplified using the principle of hydraulic amplification, and a micro displacement is amplified using the principle of lever amplification so as to test the micro force and the micro deformation of a biological soft tissue.
Description
本发明涉及软组织的生物力学领域,尤其涉及一种生物软组织微观力学特性测试仪。The invention relates to the field of biomechanics of soft tissues, in particular to a biosoft tissue micromechanical property tester.
软组织的生物力学研究涵盖一个非常广泛的范围,几乎包括人体内除骨骼外所有的组织系统。这些组织系统具体包括皮肤、软骨、结缔组织、肌肉和内脏器官。生物软组织研究广泛的范围需要一个完整的机械性能测试,包括压缩、拉伸、扭转、剪切、压入以及疲劳试验。The biomechanical study of soft tissue covers a very broad range, including almost all tissue systems except the bones in the human body. These tissue systems specifically include skin, cartilage, connective tissue, muscles, and internal organs. The broad range of biological soft tissue studies requires a complete mechanical performance test including compression, stretching, torsion, shearing, indentation, and fatigue testing.
软组织研究的一大目的是为了特征化生物组织的机械性能从而更好地设计计算模型,这些模型可以更好地理解各种医疗条件,如机动车事故过程中的内部器官损害和创伤性脑损伤脑内材料性质的改变等。软组织研究同时分析了人体内生物组织在不同机械载荷下的材料行为,如机械负荷对纤维组织结构调整的影响。随着为更好计算模型提供数据,这些信息对生物组织工程是开发与原生组织机械性能和结构相匹配的组织来说是非常必要的。A major goal of soft tissue research is to characterize the mechanical properties of biological tissues to better design computational models that better understand various medical conditions, such as internal organ damage and traumatic brain injury during motor vehicle accidents. Changes in the properties of materials in the brain, etc. Soft tissue research also analyzes the material behavior of biological tissues under different mechanical loads in human body, such as the effect of mechanical load on fiber structure adjustment. As data is provided for better computational models, this information is essential for the development of biological tissue engineering that is compatible with the mechanical properties and structure of the native tissue.
生物组织的力学特性测试在组织工程、医疗器械的研究与开发过程中是重要的环节。目前主要的生物组织力学特性测试包括挤压测试、拉伸测试和剪切测试。针对各向异性的组织测试,以挤压测试和拉伸测试为主要测试方法。其中,挤压测试对生物组织固定要求较低,测试灵活,应用面广。The mechanical properties of biological tissues are important in the research and development of tissue engineering and medical devices. Current major biomechanical properties testing includes extrusion testing, tensile testing, and shear testing. For anisotropic tissue testing, extrusion testing and tensile testing are the main test methods. Among them, the extrusion test has lower requirements for biological tissue fixation, flexible testing and wide application.
目前,生物组织力学特性测试的试验仪器有Bose 5500系列、Instron 5900、CSM bioindenter系列、TestResource 100系列,虽然可以测试产品的基本功能,
但难以对微小变形和受力测试、不能开展对5mm尺度及以下的样本测试、成本较高。At present, the test instruments for the mechanical properties of biological tissues are Bose 5500 series, Instron 5900, CSM bioindenter series, TestResource 100 series, although the basic functions of the products can be tested.
However, it is difficult to test for small deformation and stress, and it is impossible to carry out tests on samples of 5 mm or less, and the cost is high.
有鉴于上述的缺陷,本设计人,积极加以研究创新,以期创设一种新型结构的生物软组织微观力学特性测试仪,使其更具有产业上的利用价值。In view of the above shortcomings, the designer actively researches and innovates in order to create a new type of biological soft tissue micromechanical property tester, which makes it more industrially valuable.
发明内容Summary of the invention
为解决上述技术问题,本发明的目的是提供一种可以测试微小型力与微位移的生物软组织微观力学特性测试仪。In order to solve the above technical problems, an object of the present invention is to provide a biosoft tissue micromechanical property tester capable of testing micro-miniature forces and micro-displacements.
本发明的生物软组织微观力学特性测试仪,包括支座,所述支座上设有The biosoft tissue micromechanical property tester of the present invention comprises a support, and the support is provided
-样本测试台、朝向样本测试台的压力测试头以及驱动压力测试头朝向/背向样本测试台移动的驱动机构;a sample test stand, a pressure test head facing the sample test stand, and a drive mechanism driving the pressure test head toward/toward the sample test stand;
-微型力测试组件,所述微型力测试组件包括第一导管、与第一导管活动连接且支撑所述样本测试台连接的第一活塞、第二导管、与第二导管活动连接的第二活塞、与第二活塞连接的放大压力台及对放大压力台进行受力测试的力传感器,所述第一导管与第二导管通过软管连通,所述样本测试台的截面积小于放大压力台的截面积。a micro force test assembly comprising a first conduit, a first piston movably coupled to the first conduit and supporting the sample test station, a second conduit, a second piston operatively coupled to the second conduit And an amplifying pressure platform connected to the second piston and a force sensor for performing force test on the amplifying pressure platform, wherein the first conduit and the second conduit are connected by a hose, and the cross-sectional area of the sample testing platform is smaller than that of the amplifying pressure platform Cross-sectional area.
进一步的,所述支座上还设有微位移测量组件,所述微位移测量组件包括一端随所述压力测试头移动的杠杆、支撑杠杆的支杆、由杠杆带动移动的位移测试滑塞和对位移测试滑塞进行位移测试的位移传感器,所述杠杆随所述压力测试头移动的端部与所述支杆之间的距离小于所述位移测试滑塞与所述支杆之间的距离。Further, the support further includes a micro-displacement measuring assembly including a lever that moves with one end of the pressure test head, a support rod of the support lever, and a displacement test slide that is moved by the lever and a displacement sensor for performing a displacement test on the displacement test slider, wherein a distance between the end of the lever that moves with the pressure test head and the strut is smaller than a distance between the displacement test slug and the strut .
进一步的,所述微位移测量组件还包括限定所述位移测试滑塞直线移动的导轨槽,所述杠杆沿其长度方向设有滑槽,所述位移测试滑塞一端与所述滑槽
滑动连接、另一端与所述导轨槽滑动连接。Further, the micro-displacement measuring assembly further includes a rail slot defining a linear movement of the displacement test slider, the lever is provided with a sliding slot along a length thereof, and one end of the displacement test slider and the sliding slot
The sliding connection and the other end are slidably connected to the rail groove.
进一步的,所述杠杆沿其长度方向还设有调节槽,所述支杆的端部与所述调节槽转动连接。Further, the lever is further provided with an adjusting groove along a length thereof, and an end of the strut is rotatably connected to the adjusting groove.
进一步的,所述驱动结构为直线电机,直线电机的输出端通过连杆连接所述压力测试头。Further, the driving structure is a linear motor, and an output end of the linear motor is connected to the pressure testing head through a connecting rod.
进一步的,所述杠杆随所述压力测试头移动的端部与所述连杆连接。Further, the lever is connected to the connecting rod with the end of the pressure test head moving.
进一步的,所述力传感器与所述放大压力台之间的距离可调节。Further, the distance between the force sensor and the amplification pressure table can be adjusted.
进一步的,所述第一导管与第二导管的底部均设有液压口,所述软管的两端分别连接两液压口。Further, a hydraulic port is disposed on a bottom of each of the first conduit and the second conduit, and two ends of the hose are respectively connected to the two hydraulic ports.
进一步的,所述支座上还设有支撑所述第一导管的XYZ移动平台,所述XYZ移动平台包括与所述支座连接的X移动平台、与X移动平台滑动连接的XY移动平台、沿XY移动平台滑动的Y移动平台、与Y移动平台连接的Z平台底板、与Z平台底板垂直连接的第一Z向平台、沿第一Z向平台纵向滑动的第二Z向平台、与第二Z向平台连接且与所述第一导管连接的Z平台顶板,还包括驱动所述XY移动平台在X移动平台上沿X向移动的第一驱动组件、驱动Y移动平台在XY移动平台上沿Y向移动的第二驱动组件、驱动第二Z向平台在第一Z向平台上沿Z向移动的第三驱动组件。Further, the XYZ mobile platform supporting the first conduit is further disposed on the support, the XYZ mobile platform includes an X mobile platform connected to the support, and an XY mobile platform slidably connected to the X mobile platform. a Y mobile platform sliding along the XY mobile platform, a Z platform bottom plate connected to the Y mobile platform, a first Z-direction platform vertically connected to the Z platform bottom plate, a second Z-direction platform sliding longitudinally along the first Z-direction platform, and a first a Z-platform top plate connected to the first conduit and connected to the first conduit, further comprising a first driving component for driving the XY mobile platform to move in the X direction on the X mobile platform, and driving the Y mobile platform on the XY mobile platform A second drive assembly that moves in the Y direction drives a third drive assembly that moves the second Z-direction platform in the Z-direction on the first Z-direction platform.
进一步的,所述第一驱动组件包括与所述X移动平台连接的第一螺旋筒支架、与所述XY移动平台连接的第一挡块、穿设在第一螺旋筒支架上能够与第一挡块相抵的第一螺杆、与第一螺杆螺接且与第一螺旋筒支架连接的第一螺纹管、与第一螺杆端部螺接的第一螺旋筒;所述第二驱动组件包括与所述XY移动平台连接的第二螺旋筒支架、与所述Y移动平台连接的第二挡块、穿设在第二螺旋筒支架上能够与第二挡块相抵的第二螺杆、与第二螺杆螺接且与第二螺
旋筒支架连接的第二螺纹管、与第二螺杆端部螺接的第二螺旋筒;所述第三驱动组件包括与所述Z平台底板连接的旋钮支架、与所述第二Z向平台转动连接且能够与旋钮支架相抵的旋钮、与第二Z向平台连接的第三螺旋筒支架、穿设在第三螺旋筒支架上能够与旋钮相抵的第三螺杆、与第三螺杆螺接且与第三螺旋筒支架连接的第三螺纹管、与第三螺杆端部螺接的第三螺旋筒,所述旋钮包括旋钮杆、套设在旋钮杆上的旋钮环,所述旋钮环外周上连接有相垂直的第一旋钮臂和第二旋钮臂,所述第一旋钮臂和第二旋钮臂的端部均设有分别朝向所述旋钮支架和第三螺杆的触头。Further, the first driving component includes a first spiral bracket connected to the X moving platform, a first stopper connected to the XY moving platform, and the first spiral barrel bracket can be connected to the first a first screw abutting the stopper, a first threaded tube screwed to the first screw and connected to the first screw holder, and a first spiral barrel screwed to the end of the first screw; the second drive assembly includes a second screw bracket connected to the XY moving platform, a second stopper connected to the Y moving platform, a second screw disposed on the second spiral bracket and capable of abutting the second stopper, and a second Screw screwed and second screw
a second threaded tube connected to the drum holder, a second spiral barrel screwed to the second screw end; the third driving assembly includes a knob bracket connected to the Z platform bottom plate, and the second Z-direction platform a third screw that is rotatably coupled to the knob bracket, a third screw barrel bracket that is coupled to the second Z-direction platform, and a third screw that is coupled to the third screw barrel and that is coupled to the third screw a third threaded tube connected to the third spiral barrel bracket, and a third spiral barrel screwed to the end of the third screw, the knob includes a knob rod, a knob ring sleeved on the knob rod, and the knob ring is on the outer circumference A first vertical knob arm and a second knob arm are connected, and the ends of the first knob arm and the second knob arm are respectively provided with contacts facing the knob bracket and the third screw.
借由上述方案,本发明至少具有以下优点:With the above solution, the present invention has at least the following advantages:
1、采用液压放大原理对微小力进行放大,从而可以对生物软组织的微小型力进行测试;1. Use the principle of hydraulic amplification to amplify the small force, so that the micro-micro force of the biological soft tissue can be tested;
2、采用杠杆放大原理对微位移进行放大,从而可以对生物软组织的微小变形进行测试;2. The micro-displacement is amplified by the principle of lever amplification, so that the micro-deformation of the biological soft tissue can be tested;
3、XYZ移动平台调节精度高,可以准确调整样本测试台的初始位置。3. The XYZ mobile platform has high adjustment accuracy and can accurately adjust the initial position of the sample test bench.
上述说明仅是本发明技术方案的概述,为了能够更清楚了解本发明的技术手段,并可依照说明书的内容予以实施,以下以本发明的较佳实施例并配合附图详细说明如后。The above description is only an overview of the technical solutions of the present invention, and the technical means of the present invention can be more clearly understood and can be implemented in accordance with the contents of the specification. Hereinafter, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
图1是本发明的结构示意图;Figure 1 is a schematic view of the structure of the present invention;
图2是本发明中XYZ移动平台的立体结构示意图;2 is a schematic perspective view showing the XYZ mobile platform of the present invention;
图3是本发明中旋钮的结构示意图。Fig. 3 is a schematic structural view of a knob of the present invention.
下面结合附图和实施例,对本发明的具体实施方式作进一步详细描述。以下实施例用于说明本发明,但不用来限制本发明的范围。The specific embodiments of the present invention are further described in detail below with reference to the drawings and embodiments. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
参见图1至图3,本发明一较佳实施例所述的一种生物软组织微观力学特性测试仪,包括支座,支座包括水平的底板11和与底板11垂直连接的竖板12,底板11上设置XYZ移动平台50,XYZ移动平台50上设置第一导管31,第一导管31活动连接有能够相对其纵向滑动的第一活塞32,第一活塞32上连接有样本测试台21,通过第一活塞32支撑样本测试台21;底板11上还设置有第二导管33,第二导管33活动连接有能够相对其纵向滑动的第二活塞34,第二活塞34上连接有放大压力台35,通过第二活塞34支撑放大压力台35;第一导管31与第二导管33的底部均设有液压口37,通过软管连接两液压口37,使第一导管31与第二导管33连通;竖板12上设有直线电机23,直线电机23的连接一连杆24,连杆连接一压力测试头22,压力测试头22的端部朝向样本测试台21;竖板12上还设置有能够与放大压力台35接触的力传感器36。本发明中,第一导管31、第一活塞32、第二导管33、第二活塞34、放大压力台35及对放大压力台35进行受力测试的力传感器36构成生物软组织的微型力测试组件,即采用液压放大原理对微小力进行放大,从而对生物软组织的微小型力进行测试。为了能够实现液压放大,本发明中样本测试台21的截面积小于放大压力台35的截面积。Referring to FIG. 1 to FIG. 3, a biosoft tissue micro-mechanical characteristic tester according to a preferred embodiment of the present invention includes a support, and the support comprises a horizontal bottom plate 11 and a vertical plate 12 vertically connected to the bottom plate 11, and the bottom plate An XYZ moving platform 50 is disposed on the XYZ moving platform 50. The first duct 31 is movably connected with a first piston 32 slidable relative to the longitudinal direction thereof. The first piston 32 is connected with a sample testing table 21 through The first piston 32 supports the sample test table 21; the bottom plate 11 is further provided with a second conduit 33, the second conduit 33 is movably connected with a second piston 34 slidable relative to the longitudinal direction thereof, and the second piston 34 is connected with an amplifying pressure table 35 The second piston 34 supports the amplifying pressure platform 35; the bottom of the first conduit 31 and the second conduit 33 are respectively provided with a hydraulic port 37, and the two hydraulic ports 37 are connected through the hose to connect the first conduit 31 with the second conduit 33. The vertical plate 12 is provided with a linear motor 23, the linear motor 23 is connected to a connecting rod 24, the connecting rod is connected to a pressure test head 22, the end of the pressure test head 22 is facing the sample test stand 21; and the riser 12 is also provided with Can be connected to the amplification pressure table 35 The force sensor 36. In the present invention, the first duct 31, the first piston 32, the second duct 33, the second piston 34, the amplifying pressure table 35, and the force sensor 36 for stress testing the amplifying pressure table 35 constitute a micro force test assembly for biological soft tissue. That is, the hydraulic force amplification principle is used to amplify the minute force, thereby testing the micro-miniature force of the biological soft tissue. In order to enable hydraulic amplification, the cross-sectional area of the sample test stand 21 in the present invention is smaller than the cross-sectional area of the magnifying pressure table 35.
对样本的微小力进行测量时,将样本放置在样本测试台21上,当直线电机23带动压力测试头22下压样本后,样本测试台21受压后对第一活塞32加压,产生压强,由于第一导管31与第二导管33连通,通过液体将压力传递给第二活塞34,液体在相同压强下由于放大压力台35的截面积大于样本测试台21的截面积,相应传导的压力被放大,即通过放大压力台35将样本收到的压力进行
放大;由于力传感器36与放大压力台35接触,力传感器36对放大压力台35受到的压力进行测量,换算后,即可得出样本受到的压力,从而检测出样本的力学特性。When the small force of the sample is measured, the sample is placed on the sample test stand 21, and after the linear motor 23 drives the pressure test head 22 to press the sample, the sample test stand 21 is pressed to pressurize the first piston 32 to generate a pressure. Since the first conduit 31 communicates with the second conduit 33, the pressure is transmitted to the second piston 34 by the liquid, and the liquid is at the same pressure because the cross-sectional area of the amplification pressure table 35 is larger than the cross-sectional area of the sample test table 21, and the corresponding conduction pressure Being amplified, that is, by amplifying the pressure table 35, the pressure received by the sample is performed.
Zooming in; since the force sensor 36 is in contact with the amplifying pressure table 35, the force sensor 36 measures the pressure received by the amplifying pressure table 35, and after conversion, the pressure received by the sample is obtained, thereby detecting the mechanical properties of the sample.
由于需要确保力传感器26与放大压力台35接触,才能测量放大压力台35的压力,因此,本发明中力传感器36与放大压力台35之间的距离可调节,通过调整力传感器36的位置,使力传感器26与放大压力台35接触。具体的,将力传感器36安装在力传感器固定板13上,并在竖板12上开设腰形槽14,将力传感器固定板13通过螺栓穿过腰形槽14安装在竖板12上,从而可调节力传感器固定板13在竖板12上的位置,从而调整力传感器26与放大压力台35接触。Since it is necessary to ensure that the force sensor 26 is in contact with the amplifying pressure table 35, the pressure of the amplifying pressure table 35 can be measured. Therefore, the distance between the force sensor 36 and the amplifying pressure table 35 can be adjusted in the present invention, by adjusting the position of the force sensor 36, The force sensor 26 is brought into contact with the amplification pressure stage 35. Specifically, the force sensor 36 is mounted on the force sensor fixing plate 13, and a waist groove 14 is formed on the vertical plate 12, and the force sensor fixing plate 13 is mounted on the riser 12 through the waist groove 14 by bolts, thereby The position of the force sensor fixing plate 13 on the riser 12 can be adjusted, so that the adjustment force sensor 26 comes into contact with the amplification pressure table 35.
本发明中,与压力测试头22连接的连杆24上还连接有杠杆41,杠杆41的一端与连杆24连接,另一端悬空,并在竖板12上设置有支杆42,支杆42与杠杆41转动连接,用于支撑杠杆41,使杠杆41的一端可随压力测试头22移动;杠杆41还转动连接有位移测试滑塞43,并在竖板12上设有正对位移测试滑塞43的位移传感器44,以测量位移测试滑塞43的位移量。本发明中,杠杆41、支杆42、位移测试滑塞43和对位移测试滑塞进行位移测试的位移传感器44构成微位移测量组件,即采用杠杆放大原理对微位移进行放大,从而对生物软组织的微小变形进行测试。为了能够实现杠杆放大,本发明中杠杆41随压力测试头22移动的端部与支杆42之间的距离小于位移测试滑塞43与支杆42之间的距离。In the present invention, the link 24 connected to the pressure test head 22 is further connected with a lever 41. One end of the lever 41 is connected to the connecting rod 24, and the other end is suspended, and a strut 42 is disposed on the riser 12, and the strut 42 is provided. Rotatingly connected with the lever 41 for supporting the lever 41, one end of the lever 41 can be moved with the pressure test head 22; the lever 41 is also rotatably connected with the displacement test slide 43 and is provided with a positive displacement test slide on the riser 12 The displacement sensor 44 of the plug 43 measures the displacement of the displacement test slider 43. In the present invention, the lever 41, the strut 42, the displacement test slider 43, and the displacement sensor 44 for performing displacement test on the displacement test slider constitute a micro-displacement measuring component, that is, the micro-displacement is amplified by the principle of lever amplification, thereby applying biological soft tissue The tiny deformations are tested. In order to enable lever magnification, the distance between the end of the lever 41 that moves with the pressure test head 22 and the strut 42 in the present invention is smaller than the distance between the displacement test spool 43 and the strut 42.
为了限定位移测试滑塞43在杠杆41的带动下沿直线移动,本发明在竖板上还设有供位移测试滑塞43直线滑动的导轨槽45,导轨槽45纵向设置。由于杠杆41在压力测试头22作用下,绕支杆41转动,而杠杆41的端部是随压力测试头22纵向移动、位移测试滑塞43在杠杆41的带动下沿导轨槽45纵向移
动,为了将曲线移动轨迹转换成直线移动轨迹,本发明在杠杆41上沿其长度方向设有滑槽,将位移测试滑塞43的一端与滑槽滑动连接、另一端与导轨槽45滑动连接;在杠杆41上沿其长度方向还设有调节槽,将支杆42的端部与调节槽转动连接。通过使位移测试滑塞43与支杆42分别在滑槽与调节槽内滑动,从而在杠杆41转动的过程中,使杠杆41的端部与位移测试滑塞纵向移动,准确反映出样本受压后的微变形。In order to limit the displacement test slider 43 to move linearly under the driving of the lever 41, the present invention further provides a rail groove 45 for linearly sliding the displacement test slider 43 on the riser, and the rail groove 45 is longitudinally disposed. Since the lever 41 is rotated by the pressure test head 22 around the support rod 41, and the end of the lever 41 is longitudinally moved with the pressure test head 22, the displacement test slide 43 is moved longitudinally along the guide rail groove 45 by the lever 41.
In order to convert the curved path of the curve into a linear moving track, the present invention is provided with a sliding groove along the longitudinal direction of the lever 41, and one end of the displacement test sliding plug 43 is slidably connected with the sliding groove, and the other end is slidably connected with the guiding groove 45. An adjustment groove is further provided on the lever 41 along its length to rotationally connect the end of the strut 42 with the adjustment groove. By sliding the displacement test spool 43 and the strut 42 in the chute and the adjusting groove, respectively, the end portion of the lever 41 and the displacement test slider are longitudinally moved during the rotation of the lever 41, accurately reflecting the sample being pressed. After the micro deformation.
对样本的微小位移进行测量时,将样本放置在样本测试台21上,当直线电机23带动压力测试头22下压样本后,压力测试头22纵向移动带动杠杆41转动,使位移测试滑塞43沿导轨槽45移动,因杠杆41随压力测试头22移动的端部与支杆42之间的距离小于位移测试滑塞43与支杆42之间的距离,因此,位移测试滑塞43移动的位移大于压力测试头22移动的距离,从而将压力测试头22的微小位移放大,放大的位移通过位移传感器44进行测量,换算后,即可得出样本的微小变形量,从而检测出样本的力学特性。When measuring the small displacement of the sample, the sample is placed on the sample test stand 21, and after the linear motor 23 drives the pressure test head 22 to press the sample, the longitudinal movement of the pressure test head 22 drives the lever 41 to rotate, so that the displacement test slider 43 Moving along the rail groove 45, the distance between the end of the lever 41 moving with the pressure test head 22 and the strut 42 is smaller than the distance between the displacement test spool 43 and the strut 42, and therefore, the displacement test spool 43 is moved. The displacement is greater than the distance moved by the pressure test head 22, thereby amplifying the small displacement of the pressure test head 22, and the amplified displacement is measured by the displacement sensor 44. After conversion, the small deformation amount of the sample can be obtained, thereby detecting the mechanics of the sample. characteristic.
本发明中样本测试台21的初始位置通过XYZ移动平台50调整。具体的,XYZ移动平台50包括与底板11连接的X移动平台51、与X移动平台51滑动连接的XY移动平台52、沿XY移动平台52滑动的Y移动平台53、与Y移动平台53连接的Z平台底板54、与Z平台底板54垂直连接的第一Z向平台55、沿第一Z向平台55纵向滑动的第二Z向平台56、与第二Z向平台56连接且与第一导管31连接的Z平台顶板57,还包括驱动XY移动平台52在X移动平台51上沿X向移动的第一驱动组件、驱动Y移动平台53在XY移动平台52上沿Y向移动的第二驱动组件、驱动第二Z向平台56在第一Z向平台55上沿Z向移动的第三驱动组件。The initial position of the sample test station 21 in the present invention is adjusted by the XYZ moving platform 50. Specifically, the XYZ mobile platform 50 includes an X mobile platform 51 connected to the bottom plate 11, an XY moving platform 52 slidably connected to the X moving platform 51, a Y moving platform 53 sliding along the XY moving platform 52, and a Y moving platform 53. a Z platform bottom plate 54, a first Z-direction platform 55 vertically connected to the Z platform bottom plate 54, a second Z-direction platform 56 longitudinally sliding along the first Z-direction platform 55, and a second Z-direction platform 56 connected to the first conduit The 31-connected Z-platform top plate 57 further includes a first drive assembly that drives the XY moving platform 52 to move in the X-direction on the X-moving platform 51, and a second drive that drives the Y-moving platform 53 to move in the Y-direction on the XY moving platform 52. The assembly drives a third drive assembly that moves the second Z-direction platform 56 in the Z-direction on the first Z-direction platform 55.
具体的,第一驱动组件包括与X移动平台51连接的第一螺旋筒支架61、
与XY移动平台52连接的第一挡块62、穿设在第一螺旋筒支架61上能够与第一挡62块相抵的第一螺杆63、与第一螺杆63螺接且与第一螺旋筒支架61连接的第一螺纹管64、与第一螺杆63端部螺接的第一螺旋筒65;第二驱动组件包括与XY移动平台52连接的第二螺旋筒支架、与Y移动平台53连接的第二挡块、穿设在第二螺旋筒支架上能够与第二挡块相抵的第二螺杆73、与第二螺杆73螺接且与第二螺旋筒支架连接的第二螺纹管、与第二螺杆端部螺接的第二螺旋筒75;第三驱动组件包括与Z平台底板54连接的旋钮支架81、与第二Z向平台56转动连接且能够与旋钮支架81相抵的旋钮82、与第二Z向平台56连接的第三螺旋筒支架83、穿设在第三螺旋筒支架83上能够与旋钮82相抵的第三螺杆84、与第三螺杆84螺接且与第三螺旋筒支架83连接的第三螺纹管85、与第三螺杆84端部螺接的第三螺旋筒86,其中,旋钮82包括旋钮杆91、套设在旋钮杆91上的旋钮环92,旋钮环92外周上连接有相垂直的第一旋钮臂93和第二旋钮臂94,第一旋钮臂93和第二旋钮臂94的端部均设有分别朝向旋钮支架81和第三螺杆84的触头,通过旋钮杆91使旋钮82与第二Z向平台56转动连接。Specifically, the first driving component includes a first spiral bracket 61 connected to the X moving platform 51,
a first stopper 62 connected to the XY moving platform 52, a first screw 63 disposed on the first spiral cylinder bracket 61 and capable of abutting against the first gear 62, and the first screw 63 and the first spiral cylinder a first threaded tube 64 connected to the bracket 61, a first spiral barrel 65 screwed to the end of the first screw 63; the second driving assembly includes a second spiral barrel bracket connected to the XY moving platform 52, and connected to the Y moving platform 53 a second stopper, a second screw 73 disposed on the second spiral cylinder bracket to be abutted against the second stopper, a second threaded tube screwed to the second screw 73 and connected to the second spiral cylinder bracket, and a second screw barrel 75 screwed to the second screw end; the third drive assembly includes a knob bracket 81 coupled to the Z platform bottom plate 54, a knob 82 rotatably coupled to the second Z-direction platform 56 and capable of abutting the knob bracket 81, a third screw holder 83 connected to the second Z-direction platform 56, a third screw 84 that is disposed on the third screw holder 83 and that can abut against the knob 82, is screwed to the third screw 84, and is coupled to the third screw barrel a third threaded tube 85 connected to the bracket 83 and a third spiral barrel 86 screwed to the end of the third screw 84 The knob 82 includes a knob lever 91 and a knob ring 92 sleeved on the knob lever 91. The first knob arm 93 and the second knob arm 94 are connected to the outer circumference of the knob ring 92. The first knob arm 93 and the first knob arm The ends of the two knob arms 94 are respectively provided with contacts facing the knob bracket 81 and the third screw 84, and the knob 82 is rotatably connected to the second Z-direction platform 56 through the knob lever 91.
为使得XY移动平台52可相对X移动平台51滑动、Y移动平台53可相对XY移动平台52滑动、第二Z向平台56可相对第一Z向平台55滑动,本发明在XY移动平台52的上下台面上分别设有滑槽,且两滑槽呈正交设置,并在XY移动平台52与X移动平台51之间、Y移动平台53与XY移动平台52之间设置滑块58;同时在第一Z向平台55朝向第二Z向平台56的台面上也设置纵向的滑槽,并在第一Z向平台55与第二Z向平台56之间设置滑块58。In order to make the XY moving platform 52 slide relative to the X moving platform 51, the Y moving platform 53 can slide relative to the XY moving platform 52, and the second Z-direction platform 56 can slide relative to the first Z-direction platform 55, the present invention is on the XY moving platform 52. A sliding slot is respectively disposed on the upper and lower surfaces, and the two sliding slots are orthogonally arranged, and a slider 58 is disposed between the XY moving platform 52 and the X moving platform 51, and between the Y moving platform 53 and the XY moving platform 52; A longitudinal chute is also provided on the deck of the first Z-direction platform 55 toward the second Z-direction platform 56, and a slider 58 is disposed between the first Z-direction platform 55 and the second Z-direction platform 56.
调整样本测试台21的初始位置时,通过调整Z平台顶板87的水平位置和纵向高度即可,具体的,旋转第一螺旋筒65,带动第一螺纹管64转动,使第一
螺杆63朝向第一挡块62移动并与第一挡块62相抵,受到第一挡块62的抵挡,XY移动平台52在X移动平台51上沿X向移动,从而带动Z平台顶板57沿X向移动;同样的,旋转第二螺旋筒75,带动第二螺纹管转动,使第二螺杆73朝向第二挡块移动并与第二挡块相抵,受到第二挡块的抵挡,Y移动平台53在XY移动平台52上沿Y向移动,从而带动Z平台顶板57沿Y向移动;旋转第三螺旋筒86,带动第三螺纹管85转动,使第三螺杆84朝向旋钮82移动,并与旋钮82的第一旋钮臂93上的触头95接触,在第三螺杆84的作用下,旋钮82绕旋钮杆91转动,使第二旋钮臂94上的触头95与旋钮支架81接触,受旋钮支架81的抵挡作用,第二Z向平台56在第一Z向平台55上沿Z向移动,从而带动Z平台顶板57沿Z向移动,即实现了样本测试台21初始位置的调整。本发明利用螺杆调整Z平台顶板的空间位置,调节精度较高,可以实现微调整。When the initial position of the sample test table 21 is adjusted, the horizontal position and the longitudinal height of the top plate 87 of the Z platform can be adjusted. Specifically, the first spiral cylinder 65 is rotated to drive the first threaded tube 64 to rotate, so that the first
The screw 63 moves toward the first stopper 62 and abuts against the first stopper 62, and is resisted by the first stopper 62. The XY moving platform 52 moves in the X direction on the X moving platform 51, thereby driving the Z platform top plate 57 along the X. Similarly, the second spiral barrel 75 is rotated to drive the second threaded tube to rotate, so that the second screw 73 moves toward the second stopper and abuts against the second stopper, and is resisted by the second stopper, and the Y movement platform 53 moves in the Y direction on the XY moving platform 52, thereby driving the Z platform top plate 57 to move in the Y direction; rotating the third spiral barrel 86 to drive the third threaded tube 85 to rotate, so that the third screw 84 moves toward the knob 82, and The contact 95 on the first knob arm 93 of the knob 82 is in contact, and under the action of the third screw 84, the knob 82 is rotated around the knob lever 91, so that the contact 95 on the second knob arm 94 is in contact with the knob bracket 81. With the resisting action of the knob bracket 81, the second Z-direction platform 56 moves in the Z direction on the first Z-direction platform 55, thereby driving the Z-platform top plate 57 to move in the Z direction, that is, the initial position adjustment of the sample testing table 21 is realized. The invention utilizes the screw to adjust the spatial position of the top plate of the Z platform, and the adjustment precision is high, and the micro adjustment can be realized.
对于数据采集与处理方面,数据采集与处理综合应用编写程序界面进行,可以实时对测试采集的力与位移信号进行显示,并针对不同的材料模型进行数值分析与处理。数据采集板卡采用PCI-1706,实现力与位移信号的同步采集,后处理采用高弹性模型对信号进行分析插值,实现数据采集与处理综合一体化。For data acquisition and processing, the data acquisition and processing integrated application programming interface is performed, and the force and displacement signals of the test acquisition can be displayed in real time, and numerical analysis and processing are performed for different material models. The data acquisition board adopts PCI-1706 to realize the synchronous acquisition of force and displacement signals. The post-processing uses the high elasticity model to analyze and interpolate the signals to realize the integrated integration of data acquisition and processing.
以上所述仅是本发明的优选实施方式,并不用于限制本发明,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明技术原理的前提下,还可以做出若干改进和变型,这些改进和变型也应视为本发明的保护范围。
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. It should be noted that those skilled in the art can make some improvements without departing from the technical principles of the present invention. And modifications and variations are also considered to be within the scope of the invention.
Claims (10)
- 一种生物软组织微观力学特性测试仪,其特征在于:包括支座,所述支座上设有A biosoft tissue micromechanical property tester, comprising: a support, the support is provided-样本测试台、朝向样本测试台的压力测试头以及驱动压力测试头朝向/背向样本测试台移动的驱动机构;a sample test stand, a pressure test head facing the sample test stand, and a drive mechanism driving the pressure test head toward/toward the sample test stand;-微型力测试组件,所述微型力测试组件包括第一导管、与第一导管活动连接且支撑所述样本测试台连接的第一活塞、第二导管、与第二导管活动连接的第二活塞、与第二活塞连接的放大压力台及对放大压力台进行受力测试的力传感器,所述第一导管与第二导管通过软管连通,所述样本测试台的截面积小于放大压力台的截面积。a micro force test assembly comprising a first conduit, a first piston movably coupled to the first conduit and supporting the sample test station, a second conduit, a second piston operatively coupled to the second conduit And an amplifying pressure platform connected to the second piston and a force sensor for performing force test on the amplifying pressure platform, wherein the first conduit and the second conduit are connected by a hose, and the cross-sectional area of the sample testing platform is smaller than that of the amplifying pressure platform Cross-sectional area.
- 根据权利要求1所述的生物软组织微观力学特性测试仪,其特征在于:所述支座上还设有微位移测量组件,所述微位移测量组件包括一端随所述压力测试头移动的杠杆、支撑杠杆的支杆、由杠杆带动移动的位移测试滑塞和对位移测试滑塞进行位移测试的位移传感器,所述杠杆随所述压力测试头移动的端部与所述支杆之间的距离小于所述位移测试滑塞与所述支杆之间的距离。The biosoft tissue micromechanical property tester according to claim 1, wherein the support further comprises a micro-displacement measuring component, wherein the micro-displacement measuring component comprises a lever that moves with one end of the pressure test head, a struts supporting the lever, a displacement test slider driven by the lever, and a displacement sensor for performing a displacement test on the displacement test slider, the distance between the end of the lever moving with the pressure test head and the struts Less than the distance between the displacement test spool and the strut.
- 根据权利要求2所述的生物软组织微观力学特性测试仪,其特征在于:所述微位移测量组件还包括限定所述位移测试滑塞直线移动的导轨槽,所述杠杆沿其长度方向设有滑槽,所述位移测试滑塞一端与所述滑槽滑动连接、另一端与所述导轨槽滑动连接。The biosoft tissue micromechanical property tester according to claim 2, wherein the micro-displacement measuring assembly further comprises a guide groove defining a linear movement of the displacement test slider, the lever being provided with a slide along its length. a slot, one end of the displacement test slider is slidably connected to the sliding slot, and the other end is slidably connected to the rail slot.
- 根据权利要求3所述的生物软组织微观力学特性测试仪,其特征在于:所述杠杆沿其长度方向还设有调节槽,所述支杆的端部与所述调节槽转动连接。The biosoft tissue micromechanical property tester according to claim 3, wherein the lever is further provided with an adjustment groove along a length thereof, and an end of the strut is rotatably connected to the adjustment groove.
- 根据权利要求2所述的生物软组织微观力学特性测试仪,其特征在于:所述驱动结构为直线电机,直线电机的输出端通过连杆连接所述压力测试头。The biosoft tissue micromechanical property tester according to claim 2, wherein the driving structure is a linear motor, and an output end of the linear motor is connected to the pressure test head through a connecting rod.
- 根据权利要求5所述的生物软组织微观力学特性测试仪,其特征在于: 所述杠杆随所述压力测试头移动的端部与所述连杆连接。The biosoft tissue micromechanical property tester according to claim 5, wherein: The lever is coupled to the link with the end of the pressure test head moving.
- 根据权利要求1所述的生物软组织微观力学特性测试仪,其特征在于:所述力传感器与所述放大压力台之间的距离可调节。The biosoft tissue micromechanical property tester according to claim 1, wherein a distance between the force sensor and the amplification pressure stage is adjustable.
- 根据权利要求1所述的生物软组织微观力学特性测试仪,其特征在于:所述第一导管与第二导管的底部均设有液压口,所述软管的两端分别连接两液压口。The biosoft tissue micromechanical property tester according to claim 1, wherein the bottoms of the first conduit and the second conduit are each provided with a hydraulic port, and the two ends of the hose are respectively connected to the two hydraulic ports.
- 根据权利要求1-8任一项所述的生物软组织微观力学特性测试仪,其特征在于:所述支座上还设有支撑所述第一导管的XYZ移动平台,所述XYZ移动平台包括与所述支座连接的X移动平台、与X移动平台滑动连接的XY移动平台、沿XY移动平台滑动的Y移动平台、与Y移动平台连接的Z平台底板、与Z平台底板垂直连接的第一Z向平台、沿第一Z向平台纵向滑动的第二Z向平台、与第二Z向平台连接且与所述第一导管连接的Z平台顶板,还包括驱动所述XY移动平台在X移动平台上沿X向移动的第一驱动组件、驱动Y移动平台在XY移动平台上沿Y向移动的第二驱动组件、驱动第二Z向平台在第一Z向平台上沿Z向移动的第三驱动组件。The biosoft tissue micromechanical property tester according to any one of claims 1-8, wherein the support is further provided with an XYZ mobile platform supporting the first conduit, and the XYZ mobile platform includes The X mobile platform connected by the support, the XY mobile platform slidably connected to the X mobile platform, the Y mobile platform sliding along the XY mobile platform, the Z platform bottom plate connected to the Y mobile platform, and the first vertical connection with the Z platform bottom plate a Z-direction platform, a second Z-direction platform longitudinally sliding along the first Z-direction platform, a Z-platform top plate connected to the second Z-direction platform and connected to the first conduit, and further comprising driving the XY mobile platform to move in the X a first driving component moving along the X direction on the platform, a second driving component driving the Y moving platform moving in the Y direction on the XY moving platform, and a driving the second Z-direction platform moving along the Z direction on the first Z-direction platform Three drive components.
- 根据权利要求9所述的生物软组织微观力学特性测试仪,其特征在于:所述第一驱动组件包括与所述X移动平台连接的第一螺旋筒支架、与所述XY移动平台连接的第一挡块、穿设在第一螺旋筒支架上能够与第一挡块相抵的第一螺杆、与第一螺杆螺接且与第一螺旋筒支架连接的第一螺纹管、与第一螺杆端部螺接的第一螺旋筒;所述第二驱动组件包括与所述XY移动平台连接的第二螺旋筒支架、与所述Y移动平台连接的第二挡块、穿设在第二螺旋筒支架上能够与第二挡块相抵的第二螺杆、与第二螺杆螺接且与第二螺旋筒支架连接的第二螺纹管、与第二螺杆端部螺接的第二螺旋筒;所述第三驱动组件包括与所 述Z平台底板连接的旋钮支架、与所述第二Z向平台转动连接且能够与旋钮支架相抵的旋钮、与第二Z向平台连接的第三螺旋筒支架、穿设在第三螺旋筒支架上能够与旋钮相抵的第三螺杆、与第三螺杆螺接且与第三螺旋筒支架连接的第三螺纹管、与第三螺杆端部螺接的第三螺旋筒,所述旋钮包括旋钮杆、套设在旋钮杆上的旋钮环,所述旋钮环外周上连接有相垂直的第一旋钮臂和第二旋钮臂,所述第一旋钮臂和第二旋钮臂的端部均设有分别朝向所述旋钮支架和第三螺杆的触头。 The biosoft tissue micromechanical property tester according to claim 9, wherein the first driving component comprises a first spiral cylinder bracket connected to the X moving platform, and a first connection with the XY moving platform. a stopper, a first screw that is disposed on the first spiral cylinder bracket to be able to abut the first stopper, a first threaded pipe that is screwed to the first screw and connected to the first spiral cylinder bracket, and the first screw end a first spiral barrel; the second drive assembly includes a second spiral barrel bracket coupled to the XY moving platform, a second stop coupled to the Y moving platform, and a second spiral barrel bracket a second screw capable of abutting against the second block, a second threaded tube screwed to the second screw and connected to the second screw holder, and a second spiral barrel screwed to the second screw end; Three drive components include and a knob bracket connected to the bottom plate of the Z platform, a knob rotatably connected to the second Z-direction platform and capable of abutting the knob bracket, a third spiral barrel bracket connected to the second Z-direction platform, and a third spiral barrel bracket a third screw capable of abutting against the knob, a third threaded tube screwed to the third screw and connected to the third screw holder, and a third spiral barrel screwed to the third screw end, the knob including the knob a knob ring sleeved on the knob shaft, the first knob arm and the second knob arm being perpendicular to the outer circumference of the knob ring, and the ends of the first knob arm and the second knob arm are respectively provided respectively A contact toward the knob bracket and the third screw.
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