CN108175381A - A kind of knee joint endoprosthesis surface damage detecting system and its application method - Google Patents
A kind of knee joint endoprosthesis surface damage detecting system and its application method Download PDFInfo
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- CN108175381A CN108175381A CN201810020915.7A CN201810020915A CN108175381A CN 108175381 A CN108175381 A CN 108175381A CN 201810020915 A CN201810020915 A CN 201810020915A CN 108175381 A CN108175381 A CN 108175381A
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- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
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Abstract
The present invention provides a kind of knee joint endoprosthesis surface damage detecting system and its application method, the knee joint endoprosthesis surface damage detecting system include：Receiving unit is vibrated, it is described to vibrate Vibration Condition when receiving unit is used to experience motion of knee joint to obtain vibration simulation signal；Signal processing unit, the signal processing unit are electrically connected with the vibration receiving unit, for receiving the vibration simulation signal, and the vibration simulation signal are pre-processed；And information memory cell, described information storage unit are electrically connected with the signal processing unit, for storing pretreated signal.The knee joint endoprosthesis surface damage detecting system and application method of the present invention being capable of noninvasive, the quickly and accurately kneed degree of impairment of entry evaluation.
Description
Technical field
The present invention relates to a kind of knee joint endoprosthesis surface damage detecting system and its application methods.
Background technology
Knee joint belongs in human body to bear a heavy burden maximum and moves most joints, thus is also earliest, damage of degenerating in human body
Most joints.Knee cartilage wear, also known as knee joint degeneration, osteoarthritis, osteoarthropathy, degenerative joint disease,
Hypertrophic arthritis disease, hypertrophiarthritis, senescent arthritis etc. are that the most common type is chronic, progressivity joint disease.
At present, X-ray examination mainly may be used and MRI checks two methods to assess the degree of impairment of knee cartilage.
However, although the degree of impairment of indirect assessment knee cartilage is capable of in X-ray examination, its earlier damage to cartilage is simultaneously unwise
Sense, and there are radiation injuries, it is difficult to the detection means as screening knee joint early stage regression.MRI inspections can be accurate
The degree of impairment of articular cartilage, but its high cost are assessed, and generally requires reservation and checks, it is difficult to as screening means
Come the patient of screening knee joint early stage regression and the progress of the periodic monitoring state of an illness.
Invention content
In view of this, the purpose of the present invention is to provide a kind of knee joint endoprosthesis surface damage detecting system and application method,
It can noninvasive, the quickly and accurately kneed damage of entry evaluation.
To achieve the above object, the present invention provides a kind of knee joint endoprosthesis surface damage detecting system, including：Vibration receives
Unit, it is described to vibrate Vibration Condition when receiving unit is used to experience motion of knee joint to obtain vibration simulation signal；At signal
Unit is managed, the signal processing unit is electrically connected with the vibration receiving unit, for receiving the vibration simulation signal, and will
The vibration simulation signal is pre-processed；And information memory cell, described information storage unit and the signal processing list
Member electrical connection, for storing pretreated signal.
Further, the vibration receiving unit includes micro piezoelectric vibration receiver, the micro piezoelectric vibration
Receiver includes receiver and pops one's head in and fix band for the probe of fixed reception device probe, and the receiver probe includes feeling
Vibration Condition during by motion of knee joint is with the signal receiving module that obtains vibration electric signal and by the vibration electric signal conversion
Signal into analog signal converts module.
Further, the signal processing unit includes：Signal amplifier, the signal amplifier are used to amplify described shake
Dynamic analog signal；And signal filter, the signal filter are used to filter amplified vibration simulation signal；The signal mistake
Filter is low-frequency filter.
Further, the signal processing unit further includes signal adapter, after the signal adapter will be for that will filter
Vibration simulation signal be converted to digital signal.
Further, the knee joint endoprosthesis surface damage detecting system further includes signal analysis unit, the signal analysis
Unit is used to analyze pretreated signal to obtain vibration wave spectrogram.
Further, the signal analysis unit includes rumble spectrum signal analysis software.
Further, described information storage unit is hard disk or USB flash disk.
Meanwhile the present invention also provides the application method of above-mentioned knee joint endoprosthesis surface damage detecting system, including following step
Suddenly：
1) by vibrate receiving unit collect subject knee joint bend and stretch or rotational movement process in Vibration Condition
To obtain vibration simulation signal；2) the vibration simulation signal is pre-processed by signal processing unit；3) pass through information
Storage unit stores pretreated signal.
Further, it further includes：4) signal obtained after pretreatment is analyzed by signal analysis unit to obtain vibration wave
Spectrogram；And 5) the vibration wave spectrogram is analyzed, to determine kneed degree of injury and possible damage location.
Further, frequency and amplitude of the step 5) including analyzing the vibration wave spectrogram, it is kneed to determine
Degree of injury.
According to knee joint endoprosthesis surface damage detecting system provided by the invention and its application method, have below beneficial to effect
Fruit：
It 1st, being capable of noninvasive, quickly and accurately entry evaluation knee cartilage surface smooth degree and joint motions stabilization
Property, so as to preferably accomplish early intervention；It also can be as the auxiliary detection means of screening knee joint early stage disease damage.
2nd, to early stage knee osteoarthritis patients, using noninvasive harmless, simple and practical means, dynamic access knee closes
Vibration signal is saved, the early stage for knee joint osseous arthritis occurs, development provides noninvasive, harmless, simple and practical diagnostic means.
3rd, the present inventor has found under study for action：The severity of knee joint malaise symptoms is shaken with knee joint composes wave amplitude
With wave is wide is positively correlated, therefore, with reference to the dynamic change of the Radiologic imaging of pathological development, to individual subject in different follow-ups
The vibration signal that time point is acquired carries out longitudinal comparison analysis to the variation of joint vibration signal characteristics parameter, can be with table
The rule of knee joint osseous arthritis early stage progress is levied, moreover, for knee joint early lesion effect of conservative treatment, the present invention can
To provide noninvasive dynamic monitoring means.
4th, comprehensive multivariate analysis means, can combine closely the basic research of joint motions mechanics and Clinical-Imageologic Analysis,
Clinical early diagnosis, detection lesion early stage is instructed help to be in progress, disease prognosis is judged, it is larger to determine that rational therapy scheme has
Practical value.
5th, technical scheme of the present invention can be applied on motion of knee joint protection intelligence wearing equipment, to detect knee
The injury sexual act of joint motions damage.
Description of the drawings
Fig. 1 is the structure diagram of the knee joint endoprosthesis surface damage detecting system of one embodiment of the invention；
Fig. 2 is the structure diagram of the knee joint endoprosthesis surface damage detecting system of another embodiment of the present invention；
Fig. 3 is the structure diagram of the knee joint endoprosthesis surface damage detecting system of another embodiment of the invention.
Specific embodiment
In order to better illustrate the present invention, with reference to specific embodiment and attached drawing, the present invention will be further described.It can
With understanding, these specific embodiments and attached drawing are illustrative, are only used for explaining the present invention, and it is not intended that this
The limitation of invention.
Shown in reference picture 1, Fig. 2, the present invention provides a kind of knee joint endoprosthesis surface damage detecting system, is received including vibration
Unit 10, signal processing unit 20 and information memory cell 30.Wherein, vibration receiving unit 10 is for when experiencing motion of knee joint
Vibration Condition to obtain vibration simulation signal；Signal processing unit 20 is electrically connected with vibration receiving unit 10, is shaken for receiving
Dynamic analog signal, and vibration simulation signal is pre-processed；Information memory cell 30 is electrically connected with signal processing unit 20, is used
In the pretreated signal of storage.Motion of knee joint can be flexion and extension, rotation (inward turning or outward turning) movement etc..For example,
In some embodiments of the present invention, motion of knee joint is flexion and extension, and the angular range of motion of knee joint is 90 degree -180 degree.
When clinical research shows that knee joint is damaged, a series of inflammatory reaction can be generated, due to the inflammatory reaction
In the presence of the viscosity of articular cavity intrinsic articulation liquid can be caused to change.And the different degrees of degree of injury of knee joint corresponds to not
With the inflammatory reaction of degree, and then also correspond to the viscosity of different degrees of articular cavity intrinsic articulation liquid.Inventor is under study for action
Have been surprisingly found that, the change of articular cavity intrinsic articulation liquid viscosity can cause the vibrational spectrum that knee joint generates during exercise frequency and
Amplitude changes, moreover, the structural damage on knee joint endoprosthesis surface or stability of joint structural damage can lead to knee joint
Occur abnormal friction during exercise, and then the frequency of the vibrational spectrum generated during motion of knee joint and amplitude can also change,
Therefore, can kneed damage be determined by the frequency and amplitude of the vibrational spectrum generated during detection collection motion of knee joint
Degree.And then the present inventor proposes the knee joint endoprosthesis surface damage detecting system and application method of the present invention.
It is understood that the present invention to vibration receiving unit 10, signal processing unit 20 and information memory cell 30 it
Between connection mode (be electrically connected) be not particularly limited, between each other can be by wired and/or wirelessly connected
It connects, to realize the transmission of signal.It for example, can between vibration receiving unit 10, signal processing unit 20 and information memory cell 30
To be electrically connected by data line, that is, vibrating between receiving unit 10, signal processing unit 20 and information memory cell 30 is
It is attached by wired mode.
Come in fact it is understood that various common vibration reception devices may be used in the vibration receiving unit 10 of the present invention
It is existing, such as various vibrating sensors etc., as long as can accurately experience the Vibration Condition of knee joint during exercise, and obtain and shake accordingly
Dynamic signal.
In some embodiments of the invention, receiving unit 10 is vibrated for micro piezoelectric vibration receiver, miniature piezoelectric
Formula receiver utilizes the piezoelectric effect of piezo-electric crystal, has wide frequency range, the dynamic range big, small and light-weight etc. excellent
Point.Further, in some embodiments of the invention, micro piezoelectric vibration receiver includes receiver probe and for solid
The probe for determining receiver probe fixes band.During use, before receiver probe is tightly attached to the knee joint kneecap of subject
On the skin in face, receiver probe can be fixed on by the fixed band of probe on subject's knee joint, closed as a result, in subject's knee
In the motion process of section, receiver is popped one's head in can be tightly attached to the skin surface of facies anterior patellae always, so can stablize acquisition by
Vibration Condition during examination person's motion of knee joint, certainly, can also the present invention is not limited to which receiver probe is tightly attached in front of kneecap
Receiver probe is fixed on shin bone and femur side etc., is obstructed between bone face and skin without muscle, the relatively thin ground of soft tissue thickness
Side can also stablize Vibration Condition when obtaining subject's motion of knee joint.
Further, micro piezoelectric vibration receiver can include for experience Vibration Condition during motion of knee joint with
The signal for obtaining the signal receiving module of vibration electric signal and the vibration electric signal being converted into analog signal converts module.It can
With understanding, the structure and operation principle of signal receiving module and signal the conversion module of micro piezoelectric vibration receiver are
Well known to those of ordinary skill in the art, therefore, the present invention no longer repeats this.
In the knee joint endoprosthesis surface damage detecting system of the present invention, signal processing unit 20 receives list for receiving signal
The vibration simulation signal of 10 transmission of member, and the vibration simulation signal is pre-processed.In some embodiments of the invention, such as
Shown in Fig. 2, signal processing unit 20 includes：Signal amplifier 22 and signal filter 24.Signal amplifier 22 connects for amplifying
The vibration simulation signal received, differentiation in favor of vibration simulation signal are inspected and are recorded.Signal filter 24 is put for filtering
Vibration simulation signal after big, to avoid miscellaneous letter in sampling process caused by interference.That is, in this embodiment, signal processing
Unit 20 is mainly first amplified processing to the pretreatment that vibration simulation signal carries out to vibration simulation signal, then to amplification after
To vibration simulation signal be filtered processing.It is understood that can also processing first be filtered to vibration simulation signal,
Then to after filtering to vibration simulation signal be amplified processing.
It is understood that existing various common signal amplifiers (such as signal gain device) and signal mistake may be used
Filter, it is not specifically limited to this by the present invention.Preferably, in one embodiment of the invention, signal filter 24 is using low
Frequency wave filter to filter amplified vibration simulation signal, avoids the miscellaneous letter of high frequency from interfering effect in sampling process.For
The concrete structure and operation principle of signal amplifier 22 and signal filter 24 are this hair known in those of ordinary skill in the art
It is bright that this is no longer repeated.
Certainly, signal processing unit 20 can also carry out vibration simulation signal other pretreatments, for example, such as Fig. 3 institutes
Show, in one embodiment of the invention, signal processing unit 20 further includes signal adapter 26, and signal adapter 26 can incite somebody to action
Vibration simulation signal after filtering is converted to digital signal.It is understood that various common signal adapters may be used,
It is not specifically limited to this by the present invention, as long as vibration simulation signal can be converted to digital signal by it, such as simulation numeral
Signal adapter.Likewise, the concrete structure and operation principle for signal adapter 26 are those of ordinary skill in the art institute
Known, the present invention repeats no more this.
It is understood that can be by above-mentioned signal amplifier 22, signal filter 24 and signal adapter 26 can be with
The component independent for three can also be integrated in together, and it is not specifically limited to this by the present invention.
It is pre- that information memory cell 30 in knee joint endoprosthesis surface damage detecting system provided by the invention is mainly used for storage
Treated signal is situated between it is understood, therefore, that various common storages may be used in the information memory cell 30 of the present invention
Matter, the present invention are not particularly limited, such as hard disk or USB flash disk etc..It can also be appreciated that various common storages may be used
Pretreated signal is stored in hard disk by mode, for example, being stored in hard disk directly in the form of archives, convenient for inspecting for later stage
Or comparison processing.
Further, in some embodiments, knee joint endoprosthesis surface damage detecting system provided by the invention can also wrap
Signal analysis unit (not shown) is included, vibration wave spectrogram is obtained to analyze pretreated signal.It is understood that
Signal analysis method commonly used in the art may be used to pre-processing (such as enhanced processing, filtration treatment, analog-to-digital conversion process)
Signal afterwards is analyzed, and to obtain vibration wave spectrogram, the present invention is not particularly limited this.For example, the one of the present invention
In a little embodiments, which includes rumble spectrum signal analysis software, which can be with
Signal after pretreatment (such as enhanced processing, filtration treatment, analog-to-digital conversion process) is analyzed, and then obtain knee joint and shake
Vibration wave spectrogram when dynamic.
(such as amplify, filter, conversion) by pretreatment it is understood that signal analysis unit is mainly used for analysis
The digital signal obtained afterwards, to obtain vibration wave spectrogram during motion of knee joint.The signal analysis unit can be set to letter
Number between processing unit 20 and information memory cell 30, at this point, the digital signal obtained after pretreatment first passes through analysis, obtain
After vibration wave spectrogram during to motion of knee joint, which is stored in described information storage unit 30.
Certainly, which can also be set to after information memory cell 30, i.e., deposited at this point, being stored in information
Information in storage unit 30 is the digital signal obtained after pretreatment, and signal analysis unit is read from information storage unit 30
After corresponding digital signal is taken to be analyzed, the wave spectrogram of knee joint vibration is obtained.
That is, analytical procedure can be completed before storing, then vibration wave spectrogram is stored in hard disk；It can also deposit
It is completed after storage, at this point, the signal analysis unit can be the devices such as extraneous computer terminal, vibration frequency is stored in the computer
Spectrum signal analysis software.
The present invention is using using micro piezoelectric vibration receiver, as vibration receiving unit 10, information process unit 20 includes
Signal amplifier, low frequency filter and analog and digital signal converter, signal analysis unit be arranged on information memory cell 30 it
Pass through data afterwards and between vibration receiving unit 10, signal processing unit 20, information memory cell 30 and storage unit
For line connection, the course of work of the knee joint endoprosthesis surface damage detecting system of the present invention is described in detail.
First, the receiver probe of micro piezoelectric vibration receiver is fixed on subject's knee by probe fixed band to close
The skin surface in front of kneecap is saved, it is made to be tightly attached to skin surface in front of knee joint kneecap, the knee joint of subject bends and stretches work
It is dynamic that (certainly, subject or the measured can just be seated on chair and measure, and in knee joint daily routines or can also be transported
Measured when dynamic), at this point, micro piezoelectric vibration receiver experiences vibration feelings of subject's knee joint in flexion and extension
The vibration simulation signal of knee joint during exercise is obtained after condition, and the vibration simulation signal is sent to by data line at information
The signal amplifier of unit 20 is managed, which is amplified by signal amplifier, and differentiation in favor of signal is inspected
And record, then send amplified analog signal to low frequency filter, low-frequency filter filters it, to avoid height
Frequently miscellaneous letter interferes effect in sampling process, then sends the analog signal after filtering to analog and digital signal conversion
Device, analog and digital signal converter, which is converted into after data-signal, to be stored in directly in the form of archives in hard disk.Subsequently needing
When data are inspected and analyzed, the information that stores in hard disk is read by computer terminal, the rumble spectrum signal in computer
Analysis software analyzes it processing, to obtain vibration wave spectrogram during motion of knee joint, and then, according to obtained vibration
Wave spectrogram (such as frequency and amplitude) can analyze the kneed degree of injury for obtaining subject.
Meanwhile it the present invention also provides a kind of application method of above-mentioned knee joint endoprosthesis surface damage detecting system, mainly wraps
Include following steps：1) by vibrate receiving unit collect subject knee joint bend and stretch or rotational movement process in vibration feelings
Condition is to obtain vibration simulation signal；2) the vibration simulation signal is pre-processed by signal processing unit；3) pass through letter
It ceases storage unit and stores pretreated signal.Further, to determine kneed degree of injury, this method may also include：
4) signal obtained after pretreatment is analyzed by signal analysis unit to obtain vibration wave spectrogram；And 5) analyze the vibration wave
Spectrogram, to determine kneed degree of injury and possible damage location.
That is, knee joint endoprosthesis surface damage detecting system provided by the invention clinically detects knee joint endoprosthesis surface damage
It mainly comprises the following steps：Vibration Condition of the knee joint of subject during flexion-extension motion is done is collected first to obtain vibration simulation letter
Number；Then the vibration simulation signal is pre-processed；Obtained signal is to be vibrated after further being pre-processed to analysis
Wave spectrogram；Finally, the vibration wave spectrogram is analyzed, to determine kneed degree of injury.
It is understood that the pretreatment can similarly include the above-mentioned enhanced processing of the present invention, filtration treatment and
Analog-to-digital conversion process etc., the present invention are not repeating this.
In some embodiments of the invention, to obtain more comprehensive knee joint endoprosthesis surface damage situation, subject's knee
The angular range of the flexion-extension motion in joint is 90 degree -180 degree.
Inventor has been surprisingly found that the change of articular cavity intrinsic articulation liquid viscosity can cause knee joint moving under study for action
The frequency and amplitude of the vibrational spectrum generated when (such as bend and stretch, inward turning or outward turning campaign) change, and therefore, can pass through detection
Frequency and the amplitude for the vibrational spectrum that knee joint is generated when doing flexion and extension are collected to determine kneed degree of injury.Into
And in one embodiment of the invention, frequency and width of the step 5) including analyzing the vibration wave spectrogram of the application method
Value, to determine kneed degree of injury.Movement phase during at the same time it can also be occurred according to the wave crest of vibration wave spectrogram, really
Determine the possible damage location of knee joint.Wherein, the phase that wave crest occurs refers to which during motion of knee joint wave crest appear in
A stage determines which is motion of knee joint be in and other detection devices can be used in stage, for example, sync pulse jamming may be used
Video camera synchronizes motion of knee joint shooting, and then when can determine that wave crest occurs, and motion of knee joint is in that stage,
And then it can determine the possible damage location of knee joint.
It is understood that in the step 1) of application method provided by the invention, various common methods may be used
It collects Vibration Condition of the knee joint during flexion-extension motion is done of subject and obtains vibration simulation signal, the present invention does not have this
Have it is specifically limited, as long as can accurately collect Vibration Condition and obtain vibration simulation signal, for example, before the present invention may be used
The wechat piezoelectric type vibration receiver in knee joint endoprosthesis surface damage detection device described in the one embodiment stated collect by
Vibration Condition of the knee joint of examination person during movement (such as bend and stretch, inward turning or outward turning campaign) simultaneously obtains vibration simulation signal.
It is understood that knee joint endoprosthesis surface damage detecting system provided by the invention and its application method can detect
Kneed various degree of impairment, for example, cartilage damage, patellar tract is bad, meniscus injury, ligament injury etc..It can manage
Solution, the exception of knee joint rumble spectrum is a kind of reaction of comprehensive condition, wherein may including the damage of various structures
Problem can clinically integrate other means, determine which kneed specific position is damaged.
Knee joint endoprosthesis surface damage detecting system and its application method provided by the invention are closed by the knee for acquiring subject
Vibration Condition during flexion-extension motion is done is saved, is obtained being generated during motion of knee joint (as bent and stretched, inward turning or outward turning campaign)
Vibration wave spectrogram, and then obtained vibration wave spectrogram is analyzed, the qualitative comparison in transverse direction can be realized, to determine that subject's knee closes
Whether the situation of section is abnormal, and can also realize longitudinal quantitative comparison, to determine subject's knee joint endoprosthesis surface damage
Situation whether aggravate.
For example, for the qualitative comparison in transverse direction, the medical departments such as hospital or inspection center can pass through the big number of network
According to system, vibrational spectrum that when motion of knee joint (such as bend and stretch, inward turning or outward turning campaign) for collecting a large amount of normal populations generates
Scheme (i.e. the knee joint vibration wave spectrogram of normal population), be stored in the database of medical department.After subject is detected
The knee joint vibration wave spectrogram of subject is obtained, is compared by the knee joint vibration wave spectrogram with the normal population in database
It is right, it will be appreciated that whether the kneed situation of subject is abnormal, and then quickly and accurately whether entry evaluation knee joint receives damage
Wound so as to carry out tentative diagnosis to early stage knee joint retrogression pathological changes, preferably accomplishes early intervention.For longitudinal quantitative
Compare, be damaged when subject is diagnosed as knee joint, subject is during knee joint endoprosthesis surface damage is treated, Ke Yijin
Row repeated detection by comparing the knee joint vibration wave spectrogram of subject's different times, can be closed with the knee of auxiliary judgment subject
Whether section articular surface degree of impairment aggravates or improves.
Although illustrative description has been done to the present invention above, it will be understood by those skilled in the art that：
In the case of not departing from the principle of the present invention and objective, can these embodiments be carried out with a variety of variations, modification, replace and become
Type, the scope of the present invention are limited by claim and its equivalent.
Claims (10)
1. a kind of knee joint endoprosthesis surface damage detecting system, which is characterized in that including：
Receiving unit is vibrated, it is described to vibrate Vibration Condition when receiving unit is used to experience motion of knee joint to obtain vibration simulation
Signal；
Signal processing unit, the signal processing unit is electrically connected with the vibration receiving unit, for receiving the vibration mould
Intend signal, and the vibration simulation signal is pre-processed；And
Information memory cell, described information storage unit is electrically connected with the signal processing unit, pretreated for storing
Signal.
2. knee joint endoprosthesis surface damage detecting system as described in claim 1, which is characterized in that the vibration receiving unit packet
Micro piezoelectric vibration receiver is included, the micro piezoelectric vibration receiver includes receiver and pops one's head in and for fixed reception device
The probe of probe fixes band, and the receiver probe includes electric to obtain vibration for experiencing Vibration Condition during motion of knee joint
The signal receiving module of signal and the signal that the vibration electric signal is converted into analog signal convert module.
3. knee joint endoprosthesis surface damage detecting system as claimed in claim 1 or 2, which is characterized in that the signal processing list
Member includes：
Signal amplifier, the signal amplifier are used to amplify the vibration simulation signal；And
Signal filter, the signal filter are used to filter amplified vibration simulation signal；The signal filter is low
Frequency wave filter.
4. the knee joint endoprosthesis surface damage detecting system as described in right wants 3, which is characterized in that the signal processing unit also wraps
Signal adapter is included, the signal adapter is used to the vibration simulation signal after filtering being converted to digital signal.
5. knee joint endoprosthesis surface damage detecting system as described in claim 1, which is characterized in that the knee joint endoprosthesis face damage
Triage examining system further includes signal analysis unit, and the signal analysis unit is used to analyze pretreated signal to be vibrated
Wave spectrogram.
6. knee joint endoprosthesis surface damage detecting system as claimed in claim 5, which is characterized in that the signal analysis unit packet
Include rumble spectrum signal analysis software.
7. knee joint endoprosthesis surface damage detecting system as described in claim 1, which is characterized in that described information storage unit is
Hard disk or USB flash disk.
8. a kind of application method of knee joint endoprosthesis surface damage detecting system described in claim 1, which is characterized in that including with
Lower step：
1) by vibrate receiving unit collect the knee joint of subject bend and stretch or rotational movement process in Vibration Condition to obtain
Take vibration simulation signal；
2) the vibration simulation signal is pre-processed by signal processing unit；
3) pretreated signal is stored by information memory cell.
9. application method as claimed in claim 8, which is characterized in that further include：4) pre- place is analyzed by signal analysis unit
The signal obtained after reason is to obtain vibration wave spectrogram；And 5) the vibration wave spectrogram is analyzed, to determine kneed damage journey
Degree.
10. application method as claimed in claim 9, which is characterized in that the step 5) is including analyzing the vibration wave spectrogram
Frequency and amplitude, to determine kneed degree of injury and possible damage location.
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