CN101886995A - Bone biomechanical measurement device - Google Patents
Bone biomechanical measurement device Download PDFInfo
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- CN101886995A CN101886995A CN 201010200473 CN201010200473A CN101886995A CN 101886995 A CN101886995 A CN 101886995A CN 201010200473 CN201010200473 CN 201010200473 CN 201010200473 A CN201010200473 A CN 201010200473A CN 101886995 A CN101886995 A CN 101886995A
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Abstract
The invention discloses a bone biomechanical measurement device. The device is used for measuring single parameters of bones such as three mechanical parameters of bone pull pressure, torsion and bending; the fatigue parameter measurement comprises measurement of bone pull pressure, torsion and bending fatigue parameters; and the composite mechanical property measurement is the mechanical property measurement when the bone is subjected to composite stress. The bone biomechanical measurement device comprises a host system and a control system; the host system comprises a host mechanical system, a servo motor controller for driving a servo motor, a pull pressure sensor for measuring pull pressure of the bone, a bending pressure sensor for measuring the bending force of the bone, and a displacement sensor for measuring the pull pressure of the bone to generate pull pressure deformation; and the control system comprises a programmable controller, a data acquisition controller and a measurement control processor. The bone biomechanical measurement device not only realizes the measurement of single mechanical properties when the bone is acted with pull pressure, torsion and bending respectively, but also realizes the fatigue mechanical property measurement of the bone and the composite mechanical property measurement when the bone is acted with pull pressure, torsion and bending at the same time.
Description
Technical field
The present invention relates to a kind of bone biomechanical measurement device, specifically, relate to measure the bone tension and compression, reverse, crooked, the tired mechanical meaurement device of measuring.
Background technology
A kind of birth of orthopaedics new material, the application of the novel internal fixation device of a kind of orthopaedics, the innovation of the new art formula of a kind of orthopaedics all be unable to do without the biomechanics measuring technology.The orthopedic biomechanics measuring technology comprises two aspects: experiment biomechanics measuring technology and calculating biomechanics measuring technology.Development of science and technology makes the orthopedic biomechanics measuring technology perfect day by day in recent years, and confidence level increases greatly.A large amount of test data supports is just given medical science new material, new external and internal fixation device, new orthopaedics art formula innovation and application and is clinically provided strong foundation.A new research direction in orthopedic biomechanics test having become present osteology field all has large quantities of scholars to be devoted to the measurement of biomechanics of bone parameter both at home and abroad.
Along with the development of bone biomechanical, require more and more higher to the bone biomechanical proving installation.Biomechanics of bone measurement mechanism commonly used can not satisfy the high request of bone measurement.
At present, the device of measurement material biomechanics of bone performance mainly is based on universal testing machine.The advantage of universal testing machine is the mechanical property of material such as can measure tension and compression, bending, reverse.Because the versatility of universal testing machine makes it be difficult to bone is carried out high-precision measurement.
The material mechanical performance experimental provision of the measurement bone of mentioning in the domestic literature adopts universal testing machine mostly.But the shortcoming that universal testing machine is used for the bone survey also is conspicuous.For example: (1) universal testing machine mainly is the material properties test that is used for technical grade, and its range often exceeds the scope of osteometry.The test findings that can not get wanting.(2) the universal testing machine anchor clamps amount of being universal fixturing mostly is because the out-of-shape of bone makes universal fixturing can not well adapt to the bone stress measurement.(3) universal testing machine is mostly bulky and cost an arm and a leg, and is difficult to have such equipment as hospital of main unit that carries out medical experiment and medical college and school.Experiment often relies on the unit with universal testing machine, makes the medical experiment of orthopaedics aspect be difficult to carry out timely and effectively.
At present, domestic existing part scholar has launched the research work to the measurement of animal skeleton mechanical property, but the great majority experiment is to launch experimental study with the mechanics of materials as point of penetration.The material mechanical performance of measuring belongs to situation under the single force effect.Be difficult to the comprehensive mechanical property of simulation normal person's bone under multiple stressing conditions.
Summary of the invention
Technology of the present invention is dealt with problems: overcome the deficiencies in the prior art, a kind of bone biomechanical measurement device is provided, this mechanical meaurement device is not merely from mechanics viewpoint, but also fully take into account the characteristic of the biomechanics of bone performance measurement under many stresses, realized bone in tension and compression, reverse, the crooked test of making the mechanical property of time spent simultaneously, and realized fatigue mechanics performance test to bone.
Bone biomechanical measurement device of the present invention, a kind of bone biomechanical measurement device, be used for to bone carry out one-parameter measure comprise the bone tension and compression respectively, reverse, crooked three mechanics parameters, tired parameter measurement comprises the bone tension and compression, reverses, the mechanical property when bending fatigue parameter measurement and bone composite force is measured, and it comprises host computer system and control system; Described host computer system comprises main frame mechanical system, servomotor controller in order to driving servomotor, the twisting resistance mathematic(al) parameter, crooked pressure sensor that pull pressure sensor is used to measure bone in order to the mechanics of bending parameter of measuring bone, displacement transducer in order to measure the pressure mathematic(al) parameter of bone; Described control system comprises Programmable Logic Controller, data acquisition controller, and measure processor controls; The output of the pull pressure sensor in the described host computer system, crooked pressure sensor and displacement transducer all is connected on the data acquisition controller of control system, one end of servomotor controller links to each other with Programmable Logic Controller, the other end respectively be placed on host computer system in tension and compression proving installation motor, bend testing apparatus motor, reverse the proving installation motor and link to each other, Programmable Logic Controller, data acquisition controller industrial computer and measure processor controls and link to each other mutually by communication cable and carry out both-way communication;
Described main frame mechanical system comprise base, in order to the tension and compression proving installation that bone is carried out tension and compression load and measure, in order to bone is carried out the crooked bend testing apparatus that loads and measure, in order to bone is reversed the proving installation that reverses that loads and measure, described pull pressure sensor is positioned to be reversed on the proving installation, the crooked pressure sensor is positioned on the bend testing apparatus, displacement transducer is positioned on the tension and compression proving installation, and tested bone is held in the tension and compression proving installation and reverses the reversing between the proving installation of proving installation; Tension and compression proving installation, bend testing apparatus have been installed on the base and have been reversed proving installation; The tension and compression proving installation be installed on bend testing apparatus the bend testing apparatus slide unit and adopt bolt to connect, bend testing apparatus then is connected on the base by bolt, reverses proving installation position on base and can regulate;
Contain two pressure transducer passages on the described data acquisition controller, two digital photoelectric code disk passages, a displacement transducer passage; Two sensor passages are gathered pull pressure sensor, and the output of crooked pressure sensor obtains torsional pressure and crooked pressure by the A/D on the data acquisition controller; Photoelectric code disk passage is gathered the photoelectric code disk output of flexural measurement device motor, calculates and is converted into bone bending displacement during power by bending by measuring processor controls; Another photoelectric code disk passage collection be twisting action the time reverse the windup-degree of proving installation motor, calculate and be converted into the torsional displacement of bone when being subjected to twisting resistance by measuring processor controls; The displacement transducer passage is used to gather the output of displacement transducer, pressure and pressure deformation when being subjected to pressure by measuring processor controls output-response bone.
The present invention's advantage compared with prior art:
(1) the present invention can realize tension and compression, reverses, crooked one-parameter measures and duplex measurement.By several drive units are loaded simultaneously, can obtain the comprehensive mechanical property of bone under the compound loading situation by three sensors.Compound loading can well be simulated the stressing conditions of bone at human body, and then to obtaining the mechanical property of bone under human body stress's situation, obtains better measurement effect.
(2) the present invention is directed to the anchor clamps of bone design, better to the adaptability of bone, can be good at the clamping bone, avoided universal fixturing the inadaptability of bone to be caused the osteoclasia that when the bone clamping, causes.
(3) the present invention can measure the fatigue properties of bone, only be subjected to static force under situation seldom because bone belongs to motor-driven bony segment at human body, bone often is subjected to the effect of reciprocating force and bone is produced fatigure failure as the bone split that athletic bone fatigure failure causes.Therefore the fatigue properties of bone become an important parameter of bone.The present invention has broken through the limitation that former skeletal mechanics parameter can only be measured the simple physical amount, by the cycle loading of motor bone is carried out the measurement of fatigue properties.
Description of drawings
Fig. 1 is a structured flowchart of the present invention;
Fig. 2 is the structural representation of main frame mechanical system 1 of the present invention;
Fig. 3 is the structural representation of tension and compression proving installation 102 of the present invention;
Fig. 4 is the structural representation of bend testing apparatus 103 of the present invention;
Fig. 5 reverses the structural representation of proving installation 104 for the present invention;
Fig. 6 is tension and compression proving installation anchor clamps 1027 structural representations of crooked pressure sensor 5 of the present invention;
Fig. 7 is apparatus of the present invention work synoptic diagram.
Embodiment
As shown in Figure 1, measurement mechanism of the present invention comprises host computer system 7 and 3 liang of big systems of control system.Host computer system 7 comprises main frame mechanical system 1, servomotor controller 2, pull pressure sensor 4, crooked pressure sensor 5 and displacement transducer 6, and tension-compression sensor 4, crooked pressure sensor 5 and displacement transducer 6 are respectively applied for twisting resistance and torsional displacement, bending force and bending displacement, pressure and the tension and compression distortion measurement of measuring bone.Control system 3 comprises Programmable Logic Controller 301, data acquisition controller 302 and measures processor controls 303.Measure between processor controls 303 and Programmable Logic Controller 301, the data acquisition controller 302 and be connected by communication cable.Measure processor controls 303 and send instruction to Programmable Logic Controller 301, Programmable Logic Controller 301 is resolved instruction control servomotor controller 2 last drive motor measured bone is loaded.
Comprise two-way pressure transducer passage on the data acquisition controller 302, connect pull pressure sensor 4 and crooked pressure sensor 5 respectively, the measurement that is used for bone is reversed and bending; Two-way digital displacement scrambler passage, the one tunnel is used to measure the angle value of the photoelectric coded disk output of bend testing apparatus motor 1032, and another road is used to obtain the output angle value of the photoelectric code disk that reverses measurement mechanism motor 1041; A digital channel is used to obtain the displacement signal of displacement transducer 6.Device can produce deformation, the load deflection result of above-mentioned each sensor reflection bone after bone is loaded the bone stand under load after measurement mechanism is started working.Each road sensor input is gathered in data acquisition controller 302 circulations.
As shown in Figure 2, main frame mechanical system 1 comprises base 101, tension and compression proving installation 102, bend testing apparatus 103, reverses proving installation 104; Tension and compression proving installation 102, bend testing apparatus 103 have been installed on the base 101 and have been reversed proving installation 104; Tension and compression proving installation 102 is installed on the bend testing apparatus slide unit 1035 of bend testing apparatus 103 and connects with bolt.103 of bend testing apparatus are connected on the base 101 by bolt.Reversing proving installation 104 position on base can regulate, and the mode of adjusting is that 104 the proving installation motor base 1042 that reverses is fixed on the different bolts hole; Tested bone is held in the tension and compression proving installation anchor clamps 1027 of tension and compression proving installation 102 and reverses the reversing between the proving installation anchor clamps 1043 of proving installation 104.Tension and compression proving installation 102 loads and measures in order to bone is carried out tension and compression.Bend testing apparatus 103 loads and measures in order to bone is carried out bending.Reversing proving installation 104 loads and measures in order to bone is reversed.
As shown in Figure 3, tension and compression proving installation 102 of the present invention comprises tension and compression base 1021, tension and compression proving installation motor 1022, tension and compression proving installation axle sleeve 1023, tension and compression proving installation leading screw 1024, tension and compression proving installation slide unit 1025, tension and compression proving installation anchor clamps holder 1026, tension and compression proving installation anchor clamps 1027.Tension and compression proving installation motor 1022 is connected with tension and compression proving installation leading screw 1024 by tension and compression proving installation axle sleeve 1023.Tension and compression proving installation anchor clamps 1027 are installed on the tension and compression proving installation slide unit 1025 by tension and compression proving installation anchor clamps holder 1026.The rotation 1022 of tension and compression proving installation motor is converted into tension and compression proving installation slide unit 1025 along the axial rectilinear motion of tension and compression proving installation leading screw 1024 by tension and compression proving installation leading screw 1024.When tension and compression proving installation motor 1022 is operated in torque mode, the moment of torsion of tension and compression proving installation motor 1022 outputs is converted into the axial push-pull power of tension and compression proving installation slide unit 1025 by the pair of nut of tension and compression proving installation leading screw 1024, and then acts on the tested bone.Displacement transducer 6 is installed on the tension and compression proving installation slide unit 1025, and the deformation that produces when the axial push-pull masterpiece that loads is used on the bone can be obtained by displacement transducer 6.
As shown in Figure 4, bend testing apparatus 103 of the present invention comprises bend testing apparatus base 1031, bend testing apparatus motor 1032, bend testing apparatus axle sleeve 1033, bend testing apparatus leading screw 1034, bend testing apparatus slide unit 1035.Bend testing apparatus base 1031 is installed on the base 101, and bend testing apparatus motor 1032 is connected with bend testing apparatus leading screw 1034 by bend testing apparatus axle sleeve 1033.Bend testing apparatus slide unit 1035 is installed together with the tension and compression proving installation base 1021 of tension and compression proving installation 102.The rotation of bend testing apparatus motor 1032 by screw pair be converted into bend testing apparatus slide unit 1035 along the axial rectilinear motion of bend testing apparatus leading screw 1034.When bend testing apparatus motor 1032 is operated in torque mode, the moment of torsion of bend testing apparatus motor 1032 output is converted into the axial push-pull power of bend testing apparatus slide unit 1035 by screw pair, and pressure affacts on the tested bone by tension and compression proving installation 102.Because the direction of pressure is vertical with tested bone, therefore show as bending force.The bending force that affacts on the tested bone directly obtains by the crooked pressure sensor 5 that is installed on the tension and compression proving installation anchor clamps 1027, and the bending displacement that bending force produces obtains indirectly by the code-disc that bend testing apparatus motor 1032 carries.The rectilinear motion that bend testing apparatus motor 1032 drives 1034 rotations of bend testing apparatus leading screws and then is converted to bend testing apparatus slide unit 1035 carries out to tested bone that bone is crooked to load.Its photoelectric code disk output anglec of rotation during 1032 rotations of bend testing apparatus motor, the anglec of rotation is bending displacement by the displacement that conversion formula can draw bend testing apparatus slide unit 1035.The curved conversion formula is as follows:
Wherein: the angle of bend testing apparatus motor 1032 rotations when θ is crooked the loading;
P is the helical pitch of bend testing apparatus leading screw 1034;
X is that the distance of bend testing apparatus slide unit 1035 motions is crooked deformation.
Bend testing apparatus motor 1032 anglecs of rotation can be bending displacement by the displacement that conversion formula can draw bend testing apparatus slide unit 1035 by following formula.
As shown in Figure 5, the proving installation 104 that reverses of the present invention comprises and reverses proving installation motor 1041, reverses proving installation motor base 1042, reverses proving installation anchor clamps 1043, reverses proving installation plastic cement 1044.Reverse proving installation motor 1041 and be installed in and reverse on the proving installation motor base 1042, reverse axle sleeve that proving installation motor 1041 carries by pull pressure sensor 4 and reverse proving installation anchor clamps 1043 and link to each other; The moment of torsion that reverses proving installation motor 1041 output directly affacts on the tested bone, has reduced deformation that the loss twisting resistance of torsional forces produces and has obtained by reversing the photoelectric code disk that proving installation motor 1041 carries.The code-disc that reverses proving installation motor base 1042 links to each other with data acquisition controller 302 acquisition channels, and data acquisition controller 302 reads torsional displacement by corresponding acquisition channel.The direct output action of Programmable Logic Controller 301 control motors was in bone when concrete gatherer process was a torsional forces in the twisting resistance mathematic(al) parameter of bone, data acquisition controller 302 and Programmable Logic Controller 301 can two-way data communications, so data acquisition controller 302 reads the torsional forces of control motor output in the Programmable Logic Controller 301 with data transmission manner.The code-disc that reverses proving installation motor 1041 links to each other with data acquisition controller 302 acquisition channels, and data acquisition controller 302 reads torsional displacement by corresponding acquisition channel.
Be illustrated in figure 6 as the tension and compression measurement mechanism anchor clamps 1027 that crooked pressure sensor 5 has been installed, tension and compression measurement mechanism anchor clamps 1027 mainly comprise: tension and compression measurement mechanism anchor clamps traveling nut 10271, tension and compression measurement mechanism anchor clamps movable bolt 10272, tension and compression measurement mechanism anchor clamps fixed part 10273, tension and compression measurement mechanism anchor clamps movable part 10274, tension and compression measurement mechanism anchor clamps applying plastic cement 10275.Tension and compression measurement mechanism anchor clamps fixed part 10273 relies on himself bolt and tension and compression proving installation anchor clamps holder 1026 to link together.Tension and compression measurement mechanism anchor clamps movable part 10274 is installed on the bolt of tension and compression measurement mechanism anchor clamps fixed part 10273 by tension and compression measurement mechanism anchor clamps traveling nut 10271.Can regulate distance between tension and compression measurement mechanism anchor clamps movable part 10274 two parts and realize clamping by regulating tension and compression measurement mechanism anchor clamps traveling nut 10271 tested bone.Tension and compression measurement mechanism anchor clamps movable bolt 10272 is used to connect tension and compression measurement mechanism anchor clamps fixed part 10273 and tension and compression measurement mechanism anchor clamps movable part 10274 avoids tension and compression measurement mechanism anchor clamps movable part 10274 to produce rotation.Crooked pressure sensor 5 is installed on the left part of tension and compression measurement mechanism anchor clamps movable part 10274, and crooked pressure sensor 5 can directly record the bending force that acts on tested bone.Tension and compression measurement mechanism anchor clamps applying plastic cement 10275 is fitted in the both sides that contact with tested bone on the tension and compression measurement mechanism anchor clamps movable part 10274 in the mode of adhesion.Main effect is that metal directly acts on bone surface and the broken of tested bone changed when preventing anchor clamps clamping bone, on the other hand 10275 distortion of tension and compression measurement mechanism anchor clamps applying plastic cement anchor clamps and tested bone surface of contact are increased and the friction factor of plastic cement can avoid the tension and compression test greatly the time clamping become flexible.Nut 10271 when wanting the clamping bone on the rotation tension and compression measurement mechanism anchor clamps 1027 is adjusted to suitable Zhang Du tested bone is put into the clamping that anchor clamps are tightened the nut 10271 realization bones on the anchor clamps again.Tension and compression measurement mechanism anchor clamps 1027 are owing to be to adjust opening of anchor clamps and plain clamp that degree is avoided by bolt to regulate by the class leverage and open and Du Shijia holds power and added gripping member surface off plumb drawback.
As shown in Figure 7, tested bone 8 is clamped in tension and compression proving installation anchor clamps 1027 and reverses between the measurement mechanism anchor clamps 1043.Tension and compression proving installation 102, bend testing apparatus 103, reverse proving installation 104 and can carry out tension and compression, bending and twisting test to tested bone 8 respectively.
During bone tension and compression parameter measurement, measure processor controls 303 and assign the tension and compression load instructions to Programmable Logic Controller 301, Programmable Logic Controller 301 is accepted 1022 pairs of bones of instruction control servomotor controller 2 driving tension and compression proving installation motors 8 and is carried out the tension and compression loading.The bone 8 tension and compression deformation that data acquisition controller 302 collection displacement transducers, 6 output acquisition pressures and tension and compression are produced.When the bone bending parameters is measured, measure processor controls 303 and assign crooked load instructions to Programmable Logic Controller 301, Programmable Logic Controller 301 is accepted 1032 pairs of bones of instruction control servomotor controller 2 driving bend testing apparatus motors 8 and is carried out the bending loading.Data acquisition controller 302 is gathered crooked pressure sensor 5 and is obtained bending force, and the output angle conversion back of the photoelectric code disk of bend testing apparatus motor 1032 obtains bone 8 bending displacements.Detailed process is as follows: bend testing apparatus motor 1032 rotates the displacement that drives 1034 rotations of bend testing apparatus leading screw and then be converted to bend testing apparatus slide unit 1035 and is bending displacement, the photoelectric code disk output anglec of rotation of bend testing apparatus motor 1032 during 1032 rotations of bend testing apparatus motor, bend testing apparatus motor 1032 anglecs of rotation are bending displacement by the displacement that conversion formula can draw bend testing apparatus slide unit 1035.Because the photoelectric code disk of bend testing apparatus motor 1032 links to each other with data acquisition controller 302 acquisition channels, data acquisition controller 302 can collect the output angle of the photoelectric code disk of bend testing apparatus motor 1032, the output angle of the photoelectric code disk of bend testing apparatus motor 1032 is sent to by data acquisition controller 302 and measures processor controls 303, and transfer process is being measured program conversion acquisition bone 8 bending displacements that processor controls 303 is finished.When bone reversed parameter measurement, measurement processor controls 303 was assigned and is reversed load instructions to Programmable Logic Controller 301, and Programmable Logic Controller 301 is accepted 1041 pairs of bones 8 of instruction control torsion-testing apparatus motor and reversed loading.The photoelectric code disk of the collection torsion-testing apparatus motor 1041 that data acquisition controller 302 collection torsion-testing apparatus motors 1041 are applied obtains torsional displacement.
In the tired parameter measurement during parameter measurement of bone drawingand pressing fatigue, measure processor controls 303 and assign cycle tension and compression load instructions to Programmable Logic Controller 301, Programmable Logic Controller 301 is accepted 1022 pairs of bones of instruction control servomotor controller 2 driving tension and compression proving installation motors 8 and is carried out cycle tension and compression loading.Data acquisition controller 302 is gathered bone 8 cyclomorphosises that displacement transducer 6 output acquisition cycle pressure and pressures are produced.In the tired parameter measurement during the tired parameter measurement of cyrtosis, measure processor controls 303 and assign crooked load instructions of cycle to Programmable Logic Controller 301, Programmable Logic Controller 301 is accepted 1032 pairs of bones of instruction control servomotor controller 2 driving bend testing apparatus bend testing apparatus motors 8 and is carried out crooked loading of cycle.Data acquisition controller 302 is gathered crooked pressure sensor 5 and is obtained the cycle bending force, and the output angle conversion back of gathering the photoelectric code disk of bend testing apparatus motor 1032 obtains bending displacement.In the tired parameter measurement during bone torsional fatigue parameter measurement, measure 303 cycles of assigning of processor controls and reverse load instructions to Programmable Logic Controller 301, Programmable Logic Controller 301 is accepted 1041 pairs of 8 cycles of bone of instruction control servomotor controller 2 driving torque proving installation motors and is reversed loading, and pull pressure sensor 4 obtains the cycle twisting resistance.The cycle torsional forces that data acquisition controller 302 collection torsion-testing apparatus motors 1041 are applied and the photoelectric code disk output of torsion-testing apparatus motor 1041 obtain torsional displacement.
Mechanical property when the mechanical property measurement during the bone composite force is the bone composite force is measured, measurement processor controls 303 is assigned compound loading and is instructed to Programmable Logic Controller 301, Programmable Logic Controller 301 is accepted instruction and is controlled servomotor controller 2 driving tension and compression proving installation motors 1022 simultaneously, bend testing apparatus motor 1032,1041 pairs of bones 8 of torsion-testing apparatus motor carry out tension and compression simultaneously, crooked, reverse loading, data acquisition controller 302 collects the pressure when loading simultaneously, bending force, torsional forces and tension and compression deformation, bending displacement, torsional displacement.Duplex measurement is multiple measurement in twos or three duplex measurement simultaneously arbitrarily, and control mode is the motor that participates in loading to be assigned load instructions when measuring processor controls 303 and assigning instruction, and data acquisition controller 302 is gathered the deformation that tested amount produced.
Bone biomechanical measurement device of the present invention contains safety precautions.Be divided into mechanical electric protection on the host computer system 7 and the control overload protection on the control system 3.Protect for mechanical electric; at all movable parts; comprise the moving forward and backward of tension and compression proving installation 102, tension and compression proving installation 102 move left and right and the twisting motion of reversing proving installation 104 under the drive of bend testing apparatus 103; electric limiting and protecting device is all arranged when it moves to extreme position; spacingly just work, spacingly realize by Programmable Logic Controller 301 and the collaborative work of servomotor feedback.
All electrical equipment among the present invention, motor all have overvoltage, overcurrent, short circuit and overload protection measure.When electrical equipment or motor have overvoltage, overcurrent, motor and electrical equipment quit work at once and removes rear motor and electrical equipment just can work on when overvoltage, overcurrent, short circuit when short-circuit conditions occurred.In test process, when running into unexpected power failure,, itself has certain self-locking property because of used gear train is by ball screw.So machine is locked on the current position, treat service restoration after, could normally move.Guaranteed the safety of test.The power overload protection is according to the overload quantity of setting (be generally full test power or moment of torsion 3%～5%).When the power power of being loaded into is loaded on the proving installation; when moving it (no matter be to continue stress state, still at the gradual change stress state), in case the power value of force transducer output reaches the overload quantity of setting; servo drive system will stop to load, and protect tested member and testing machine.
The above mechanics parameter that obtains carries out data processing by measuring processor controls 303 again, data processing mainly comprises: the data filtering that all collect, take out noise signal and peak signal in the data, the filtering algorithm that is adopted mainly contains peak filtering and average value filtering; And with all mechanics parameters inputs (pressure, twisting resistance, bending force) be horizontal ordinate and with exercising result (tension and compression deformation, torsional displacement, bending displacement) be ordinate respectively chart paint preservation gained data.
Claims (9)
1. bone biomechanical measurement device, it is characterized in that: be used for to bone carry out one-parameter measure comprise the bone tension and compression respectively, reverse, crooked three mechanics parameters, tired parameter measurement comprises the bone tension and compression, reverses, the mechanical property when bending fatigue parameter measurement and bone composite force is measured.It comprises host computer system (7) and control system (3); Described host computer system (7) comprises main frame mechanical system (1), servomotor controller (2) in order to driving servomotor, pull pressure sensor (4) be used to measure the twisting resistance of bone and torsional displacement, crooked pressure sensor (5) in order to the bending force of measuring bone, displacement transducer (6) in order to measure the pressure of bone; Described control system (3) comprises control able to programme (301), data acquisition controller (302), and measure processor controls (303); Pull pressure sensor (4) in the described host computer system (7), the output of crooked pressure sensor (5) and displacement transducer (6) all is connected on the data acquisition controller (302) of control system (3), one end of servomotor controller (2) links to each other with Programmable Logic Controller (301), the other end respectively with the tension and compression proving installation motor (1022) that is placed in the host computer system (7), bend testing apparatus motor (1032), reverse proving installation motor (1041) and link to each other Programmable Logic Controller (301), data acquisition controller (302) measurement processor controls (303) links to each other mutually by communication cable and carries out both-way communication;
Described main frame mechanical system (1) comprises base (101), in order to bone is carried out the tension and compression proving installation (102) that tension and compression load and measure, in order to bone is carried out the crooked bend testing apparatus (103) that loads and measure, in order to bone is reversed load and measure reverse proving installation (104), described pull pressure sensor (4) is positioned to be reversed on the proving installation (104), crooked pressure sensor (5) is positioned on the bend testing apparatus (103), displacement transducer (6) is positioned on the tension and compression proving installation (102), and tested bone is held in tension and compression proving installation (102) and reverses between the proving installation (104); Tension and compression proving installation (102), bend testing apparatus (103) have been installed on the base (101) and have been reversed proving installation (104); Tension and compression proving installation (102) be installed on bend testing apparatus (103) bend testing apparatus slide unit 1035 and adopt bolt to connect, bend testing apparatus (103) then is connected on the base (101) by bolt, reverses proving installation (104) and upward can regulate the position at base (101);
Contain two force transducer passages on the described data acquisition controller (302), two digital photoelectric code disk passages, a displacement transducer passage; Two force transducer passages are gathered pull pressure sensor (4), and crooked pressure sensor (5) output obtains twisting resistance and bending force by the A/D on the data acquisition controller (302); Photoelectric code disk passage is gathered the photoelectric code disk output of flexural measurement device motor (1032), calculates and is converted into bone bending displacement during power by bending by measuring processor controls (303); Another photoelectric code disk passage collection be twisting action the time reverse the windup-degree torsional displacement of proving installation motor (1041); The displacement transducer passage is used to gather the output of displacement transducer (6), tension and compression deformation when being subjected to pressure by measuring processor controls (303) output-response bone.
2. bone biomechanical measurement device according to claim 1 is characterized in that: described tension and compression proving installation (102) comprises tension and compression proving installation base (1021), tension and compression proving installation motor (1022), tension and compression proving installation axle sleeve (1023), tension and compression proving installation leading screw (1024), tension and compression proving installation slide unit (1025), tension and compression proving installation anchor clamps holders (1026), tension and compression proving installation anchor clamps (1027); Tension and compression proving installation motor (1022) is connected with tension and compression proving installation leading screw (1024) by tension and compression proving installation axle sleeve (1023); Tension and compression proving installation anchor clamps (1027) are installed on the tension and compression proving installation slide unit (1025) by tension and compression proving installation anchor clamps holders (1026); The rotation (1022) of tension and compression proving installation motor is converted into tension and compression proving installation slide unit (1025) along the axial rectilinear motion of tension and compression proving installation leading screw (1024) by tension and compression proving installation leading screw (1024); When tension and compression proving installation motor (1022) when being operated in torque mode, the moment of torsion of tension and compression proving installation motor (1022) output is converted into the axial push-pull power of tension and compression proving installation slide unit (1025) by the pair of nut of tension and compression proving installation leading screw (1024), and then acts on the tested bone; Displacement transducer (6) is installed on the tension and compression proving installation slide unit (1025), produces tension and compression deformation when the axial push-pull masterpiece that loads is used on the bone, and tension and compression deformation is by displacement transducer (6) output.
3. bone biomechanical measurement device according to claim 1 is characterized in that: described bend testing apparatus (103) comprises bend testing apparatus base (1031), bend testing apparatus motor (1032), bend testing apparatus axle sleeve (1033), bend testing apparatus leading screw (1034), bend testing apparatus slide unit (1035); Bend testing apparatus base (1031) is installed on the base (101), and bend testing apparatus motor (1032) is connected with bend testing apparatus leading screw (1034) by bend testing apparatus axle sleeve (1033); Bend testing apparatus slide unit (1035) is installed together with the tension and compression proving installation base (1021) of tension and compression proving installation (102); The rotation of bend testing apparatus motor (1032) by screw pair be converted into bend testing apparatus slide unit (1035) along the axial rectilinear motion of bend testing apparatus leading screw (1034); Bend testing apparatus motor (1032) is when being operated in torque mode, the moment of torsion of bend testing apparatus motor (1032) output is converted into the pressure of bend testing apparatus slide unit (1035) by screw pair, pressure affacts on the tested bone by tension and compression proving installation (102), the direction of pressure is vertical with tested bone, show as bending force, the bending force that affacts on the tested bone directly obtains by the crooked pressure sensor (5) that is installed on the tension and compression proving installation anchor clamps (1027), and the bending displacement that bending force produces obtains indirectly by the code-disc that bend testing apparatus motor (1032) carries.The process that bending displacement obtains is as follows: bend testing apparatus motor (1032) drives that bend testing apparatus leading screw (1034) rotates and then the rectilinear motion that is converted to bend testing apparatus slide unit (1035) carries out to tested bone that bone is crooked to load, photoelectric code disk output anglec of rotation during loading, the anglec of rotation is bending displacement by the displacement that conversion formula can draw bend testing apparatus slide unit (1035).
4. bone biomechanical measurement device according to claim 1 is characterized in that: the described proving installation (104) that reverses comprises and reverses proving installation motor (1041), reverses proving installation motor base (1042), reverses proving installation anchor clamps (1043), reverses proving installation plastic cement (1044); Reverse proving installation motor (1041) and be installed in and reverse on the proving installation motor base (1042), reverse axle sleeve that proving installation motor (1041) carries by pull pressure sensor (4) and reverse proving installation anchor clamps (1043) and link to each other; The moment of torsion that reverses proving installation motor (1041) output directly affacts on the tested bone, has reduced the loss of torsional forces.The deformation that twisting resistance produces is by reversing the photoelectric code disk acquisition that proving installation motor (1041) carries; The code-disc that reverses proving installation motor base (1042) links to each other with data acquisition controller (302) acquisition channel.
5. bone biomechanical measurement device according to claim 1 is characterized in that: the described proving installation (104) that reverses upward can be adjusted to realize the measurement of different length bone the installation site at base (101).The mode of adjusting is that the proving installation motor base (1042) that reverses that reverses proving installation (104) is fixed on the different bolt hole of base (101).
6. bone biomechanical measurement device according to claim 1, it is characterized in that: when carrying out the measurement of bone pressure mathematic(al) parameter in the described one-parameter, measure processor controls (303) and assign the tension and compression load instructions to Programmable Logic Controller (301), Programmable Logic Controller (301) is accepted instruction control servomotor controller (2) driving tension and compression proving installation motors (1022) and is carried out the tension and compression loading, and data acquisition controller (302) is gathered displacement transducer (6) output and obtained pressure and tension and compression deformation; When carrying out the parameter measurement of bone mechanics of bending during described one-parameter is measured, measure processor controls (303) and assign crooked load instructions to Programmable Logic Controller (301), Programmable Logic Controller (301) is accepted instruction control servomotor controller (2) driving bend testing apparatus motor 1032 and is carried out the bending loading, data acquisition controller (302) is gathered crooked pressure sensor (5) and is obtained bending force, and the output angle conversion back of the photoelectric code disk of bend testing apparatus motor (1032) obtains bending displacement; When bone twisting resistance mathematic(al) parameter is measured in one-parameter is measured, measurement processor controls (303) is assigned and is reversed load instructions to Programmable Logic Controller (301), Programmable Logic Controller (301) is accepted instruction control servomotor controller (2) driving torque proving installation motor (1041) and is reversed loading, data acquisition controller (302) is gathered pull pressure sensor (4) and is obtained twisting resistance, and the output angle commentaries on classics of reversing the photoelectric code disk of proving installation motor (1042) is torsional displacement.
7. bone biomechanical measurement device according to claim 1, it is characterized in that: in the described tired parameter measurement during parameter measurement of bone drawingand pressing fatigue, measure processor controls (303) and assign cycle tension and compression load instructions to Programmable Logic Controller (301), Programmable Logic Controller (301) is accepted instruction control servomotor controller (2) driving tension and compression proving installation motors (1022) and is carried out cycle tension and compression loading, and data acquisition controller (302) is gathered displacement transducer (6) output acquisition cycle pressure and cycle tension and compression deformation; In the described tired parameter measurement during the tired parameter measurement of cyrtosis, measure processor controls (303) and assign crooked load instructions of cycle to Programmable Logic Controller (301), control able to programme (301) is accepted instruction control servomotor controller (2) driving bend testing apparatus motor (1032) and is carried out crooked loading of cycle, data acquisition controller (302) is gathered crooked pressure sensor (5) and is obtained the cycle bending force, gathers the output angle conversion back acquisition cycle bending displacement of the photoelectric code disk of bend testing apparatus motor (1032); In the described tired parameter measurement during bone torsional fatigue parameter measurement, measure processor controls (303) cycle of assigning and reverse load instructions to Programmable Logic Controller (301), Programmable Logic Controller (301) is accepted instruction control servomotor controller (2) driving torque proving installation motor (1041) cycle and is reversed loading, data acquisition controller (302) is gathered pull pressure sensor (4) and is obtained the cycle twisting resistance, reverses the output angle conversion back acquisition cycle torsional displacement of the photoelectric code disk of proving installation motor (1042).
8. bone biomechanical measurement device according to claim 1, it is characterized in that: when the mechanical property during described bone composite force is measured, measurement processor controls (303) is assigned compound loading and is instructed to Programmable Logic Controller (301), Programmable Logic Controller (301) is accepted instruction and is controlled servomotor controller (2) driving tension and compression proving installation motors (1022) simultaneously, bend testing apparatus motor (1032), torsion-testing apparatus motor (1041) carries out tension and compression simultaneously to bone, crooked, reverse loading, data acquisition controller (302) collects the tension and compression when loading simultaneously, crooked, moment of torsion, tension and compression deformation, bending displacement or torsional displacement; The instruction of described compound loading for tension and compression, bending, reverse, cycle tension and compression, cycle bending or cycle reverse in combination or three load instructions simultaneously in twos arbitrarily.
9. bone biomechanical measurement device according to claim 1 is characterized in that: described tension and compression proving installation anchor clamps (1027) comprise tension and compression measurement mechanism anchor clamps traveling nuts (10271), tension and compression measurement mechanism anchor clamps movable bolts (10272), tension and compression measurement mechanism anchor clamps fixed parts (10273), tension and compression measurement mechanism anchor clamps movable parts (10274), tension and compression measurement mechanism anchor clamps applying plastic cement (10275); Tension and compression measurement mechanism anchor clamps fixed parts (10273) rely on bolt of himself and tension and compression proving installation anchor clamps holders (1026) to link together, tension and compression measurement mechanism anchor clamps movable parts (10274) are installed in by tension and compression measurement mechanism anchor clamps traveling nuts (10271) on the bolt of tension and compression measurement mechanism anchor clamps fixed parts (10273), can regulate distance between tension and compression measurement mechanism anchor clamps movable parts (10274) two parts and realize clamping to tested bone by regulating tension and compression measurement mechanism anchor clamps traveling nuts (10271); Tension and compression measurement mechanism anchor clamps movable bolts (10272) are used to connect tension and compression measurement mechanism anchor clamps fixed parts (10273) and tension and compression measurement mechanism anchor clamps movable parts (10274), and (102740 produce rotation to avoid tension and compression measurement mechanism anchor clamps movable part; Crooked pressure sensor (5) is installed on the left part of tension and compression measurement mechanism anchor clamps movable parts (10274), and crooked pressure sensor (5) can directly record the bending force that acts on tested bone; Tension and compression measurement mechanism anchor clamps applying plastic cement (10275) are fitted in the both sides that tension and compression measurement mechanism anchor clamps movable parts (10274) upward contact with tested bone in the mode of adhesion, metal directly acts on bone surface and the broken of tested bone is changed when preventing anchor clamps clamping bone, on the other hand tension and compression measurement mechanism anchor clamps applying plastic cement (10275) distortion anchor clamps and tested bone surface of contact are increased and the friction factor of plastic cement can avoid the tension and compression test greatly the time clamping become flexible; Nut (10271) when wanting the clamping bone on the rotation tension and compression measurement mechanism anchor clamps (1027) is adjusted to suitable Zhang Du tested bone is put into the clamping that anchor clamps are tightened nut (10271) the realization bone on the anchor clamps again.Tension and compression measurement mechanism anchor clamps 1027 are owing to be to adjust opening of anchor clamps and plain clamp that degree is avoided by bolt to regulate by the class leverage and open and the Du Shijia power of holding is held bone surface off plumb drawback with being added.
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| CN2010102004738A CN101886995B (en) | 2010-06-09 | 2010-06-09 | Bone biomechanical measurement device |
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| CN102353589A (en) * | 2011-07-11 | 2012-02-15 | 天津理工大学 | Method for using digital images relevant technology in cartilage mechanical property test |
| CN102507343A (en) * | 2011-10-13 | 2012-06-20 | 重庆大学 | Test piece for shape memory alloy pulling and twisting experiment, fixture and device therefor |
| CN102980805A (en) * | 2012-11-16 | 2013-03-20 | 广东奥美格传导科技股份有限公司 | Method and machine for tension-torsion test of charging pile special-purpose cable |
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| CN102353589A (en) * | 2011-07-11 | 2012-02-15 | 天津理工大学 | Method for using digital images relevant technology in cartilage mechanical property test |
| CN102353589B (en) * | 2011-07-11 | 2013-05-01 | 天津理工大学 | Method for using digital images relevant technology in cartilage mechanical property test |
| CN102507343A (en) * | 2011-10-13 | 2012-06-20 | 重庆大学 | Test piece for shape memory alloy pulling and twisting experiment, fixture and device therefor |
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| CN102980805A (en) * | 2012-11-16 | 2013-03-20 | 广东奥美格传导科技股份有限公司 | Method and machine for tension-torsion test of charging pile special-purpose cable |
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| CN110044723A (en) * | 2019-05-08 | 2019-07-23 | 苏州昇特智能科技有限公司 | A kind of Visualized Flexible material bending performance measuring device |
| WO2020224001A1 (en) * | 2019-05-08 | 2020-11-12 | 苏州昇特智能科技有限公司 | Visual flexible-material bending performance measuring device |
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