CN112807135A - Device, system and method for measuring inner diameter and polishing depth of marrow cavity - Google Patents
Device, system and method for measuring inner diameter and polishing depth of marrow cavityDownload PDFInfo
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/46—Special tools for implanting artificial joints
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Abstract
Translated fromChinese
Description
Technical Field
The present application relates to the field of medical devices, and more particularly to devices, systems, and methods for measuring the inner diameter of a bone marrow cavity and a depth of a burr, and computer readable storage media.
Background
Total Hip Arthroplasty (THA) is a method of replacing a prosthetic hip prosthesis with a diseased or damaged articular surface, femoral head and acetabulum by using an operation method to achieve the effects of removing a focus of infection, eliminating pain, recovering the original functions of a joint and the like, and is widely applicable to treating hip joint diseases such as ankylosis, femoral head necrosis, osteoarthritis, rheumatoid arthritis and the like. The bone mass of humans decreases with age, the elderly are high-incidence populations of hip joint disease, and total hip replacement is one of the most common methods for treating hip joint related diseases. With the increasing aging of China, the demand for artificial total hip replacement will increase. Matched joint prostheses are critical to achieving success in clinical surgery, avoiding instability of the joint prosthesis and wear of the joint interface. The traditional artificial total hip joint replacement operation is easily affected by the mismatching of the selected prosthesis template, thereby affecting the treatment effect. The introduction of the femoral medullary cavity shape measuring device can effectively improve the effect of the artificial total hip joint replacement operation.
In the process of performing the artificial total hip joint operation, the selection of the matched femoral head prosthesis is the key for successful operation, the artificial prosthesis with reasonable size is beneficial to the postoperative recovery of a patient, and the situations of artificial prosthesis sinking, long and short legs and the like are avoided. In the existing technical solution, a common femur morphology measurement method is to measure through X-ray or CT images. However, the method simply reflects the shape of the whole femoral medullary cavity by means of X-ray and CT images, and is affected by factors such as imaging quality and shooting angle, and the result is not accurate enough. In another common technical scheme, the morphological parameters of the femoral medullary cavity are measured by means of CAD software and other modeling tools, but due to low manual execution efficiency of the software and high algorithm design requirements, the real-time morphological parameters of the femoral medullary cavity required by a doctor are difficult to obtain quickly in a clinical operation. Generally speaking, measurements of the inner diameter of the medullary cavity and the depth of the burr are cumbersome and inaccurate at present.
Disclosure of Invention
The present application is directed to solving at least one of the problems in the prior art. To this end, the present application provides an apparatus, system and method for measuring the inner diameter and depth of a medullary cavity, and a computer readable storage medium for conveniently measuring the inner diameter and depth of the medullary cavity.
First aspect, this application provides a marrow cavity internal diameter and depth of polish measuring device, includes:
the rod body is of a hollow structure, and an inner cavity is formed in the rod body;
the rebounding mechanism is arranged on the outer side wall of the first end of the rod body and used for sensing the change of the inner diameter of the marrow cavity and sending a deformation signal;
the positioning mechanism is arranged on the outer side wall of the second end of the rod body and used for an external optical positioning device to capture the position and obtain position information, and the grinding depth of the marrow cavity is calculated through the position information;
the first main control module is arranged in the inner cavity and electrically connected with the rebounding mechanism, and the first main control module is used for calculating the inner diameter of the medullary cavity according to the deformation signal.
According to this application first aspect embodiment's marrow chamber internal diameter and depth of polish measuring device, have following beneficial effect at least: stretch into the marrow intracavity with the first end of the body of rod, convey first host system through the deformation signal on the resilience mechanism, first host system calculates the marrow chamber internal diameter in real time to the realization is to the real-time measurement of marrow chamber internal diameter, and optical positioning device carries out the position through the positioning mechanism to body of rod second end lateral wall and catches and carry out the real-time measurement of the degree of depth of polishing, device easy operation, and can convenient internal diameter and the degree of depth of polishing that measure the marrow wall simultaneously, improved the practicality.
According to some embodiments of the first aspect of the present application, the rebounding mechanism includes an elastic sheet, a return spring and a pressure sensor, the elastic sheet is disposed on the outer side wall of the first end of the rod body, the return spring and the pressure sensor are disposed in the inner cavity, one end of the return spring is connected with the elastic sheet, the other end of the return spring is connected with the pressure sensor, and the first main control module is electrically connected with the pressure sensor.
According to some embodiments of the first aspect of the present application, the positioning mechanism comprises an optical positioning ball and a connecting piece, the connecting piece is disposed on the side wall of the second end of the rod body, the optical positioning ball is disposed on one side of the connecting piece away from the rebounding mechanism, and the optical positioning ball is used for an optical positioning device to capture position information.
According to some embodiments of the first aspect of the present application, the rod body includes a first connecting portion, a second connecting portion and a tip portion, the first connecting portion and the tip portion are respectively disposed at two ends of the second connecting portion, the positioning mechanism is disposed at the first connecting portion, and the resilient mechanism is disposed at the second connecting portion near an outer side wall of one end of the tip portion.
According to some embodiments of the first aspect of the present application, the bone marrow instrument further comprises a display module, wherein the display module is disposed on the sidewall of the rod body and electrically connected to the first main control module, and is used for displaying an inner diameter value of the bone marrow cavity.
Some embodiments according to the first aspect of the present application further comprise a control panel electrically connected to the first master control module.
In a second aspect, the present application further provides a medullary cavity inner diameter and polishing depth measuring system, including: the optical positioning device comprises an optical positioning sensor and a second main control module, the optical positioning sensor is electrically connected with the second main control module, the optical positioning sensor is used for capturing the position information of the positioning mechanism, and the second main control module is used for calculating the grinding depth of the bone marrow cavity.
According to this application second aspect embodiment's internal diameter of marrow chamber and depth of polish measuring device, have following beneficial effect at least: stretch into the marrow intracavity with the first end of the body of rod, deformation signal through resilience mechanism conveys first host system, first host system calculates the marrow chamber internal diameter in real time, thereby realize the real-time measurement to the marrow chamber internal diameter, optical positioning sensor carries out the position through the positioning mechanism to body of rod second end lateral wall and catches and calculate the degree of depth of polishing through second host system, realize the real-time measurement to the marrow chamber internal diameter, device easy operation, and can convenient internal diameter and the degree of depth of polishing of measuring the marrow wall simultaneously, the practicality has been improved.
In a third aspect, the present application further provides a method for measuring an inner diameter of a medullary cavity, which is applied to a system for measuring an inner diameter and a polishing depth of the medullary cavity with a rebound mechanism, and comprises:
acquiring the original diameter of the rebound mechanism which does not extend into a medullary cavity;
acquiring a deformation signal of a pressure sensor on the rebound mechanism extending into a medullary cavity;
and calculating the inner diameter change data of the marrow cavity according to the original diameter and the deformation signal.
According to this application third aspect embodiment's internal diameter of marrow chamber and depth of polish measuring device, have at least following beneficial effect: first host system acquires the original diameter of resilience mechanism not stretching into the marrow cavity, stretches into the marrow cavity with the device, acquires resilience mechanism and goes up pressure sensor's deformation signal, calculates marrow cavity internal diameter change data through original diameter and deformation signal, need not complicated operation, and is simple convenient.
In a fourth aspect, the present application further provides a method for measuring a polishing depth of a medullary cavity, which is applied to a system for measuring an inner diameter and a polishing depth of a medullary cavity with a positioning mechanism, and includes:
acquiring original position information of an optical positioning ball on the positioning mechanism just before the optical positioning ball extends into a marrow cavity;
acquiring the change position information of the optical positioning ball which extends into the marrow cavity;
and calculating the grinding depth change data of the marrow cavity according to the original position and the change position.
According to this application fourth aspect embodiment's marrow chamber internal diameter and depth of polish measuring device, have following beneficial effect at least: the second main control module obtains original position information of the optical positioning ball which does not extend into the marrow cavity from the optical positioning sensor, the device extends into the marrow cavity, changed position information of the optical positioning ball is obtained, and the grinding depth change data of the marrow cavity is calculated through the original position information and the changed position information, so that the device is simple and convenient without complex operation.
In a fifth aspect, the present application further provides a computer-readable storage medium having stored thereon computer-executable instructions for causing a computer to perform a method for measuring an inner diameter of a bone marrow cavity according to any one of the embodiments of the third aspect or a method for measuring a grinding depth of a bone marrow cavity according to any one of the embodiments of the fourth aspect.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
Additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic representation of the configuration of an apparatus for measuring the inner diameter of a bone marrow cavity and the depth of abrasion according to some embodiments of the first aspect of the present application;
FIG. 2 is a side view of an intramedullary canal inner diameter and depth of abrasion measurement device according to some embodiments of the first aspect of the present application;
FIG. 3 is a schematic structural view of a rebounding mechanism of some embodiments of the first aspect of the present application;
FIG. 4 is a flow chart of a method of measuring an inner diameter of a bone marrow cavity according to an embodiment of a third aspect of the present application;
fig. 5 is a flow chart of a method for measuring a depth of a cavity cut according to an embodiment of the fourth aspect of the present application.
The reference numbers are as follows:
the display device comprises arod body 100, a first connectingpart 110, a second connectingpart 120, atip part 130, arebound mechanism 200, anelastic sheet 210, areturn spring 220, apressure sensor 230, anoptical positioning ball 310, aconnecting sheet 320, adisplay module 400 and acontrol panel 500.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the positional descriptions, such as the directions of up, down, front, rear, left, right, etc., referred to herein are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present application.
In the description of the present application, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.
In the description of the present application, unless otherwise expressly limited, terms such as set, mounted, connected and the like should be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present application by combining the detailed contents of the technical solutions.
The application is further elucidated below on the basis of figures and examples.
In a first aspect, referring to fig. 1, the present application provides a medullary cavity inner diameter and polishing depth measuring device, comprising: therod body 100 is of a hollow structure, and an inner cavity is formed in therod body 100; therebounding mechanism 200 is arranged on the outer side wall of the first end of therod body 100 and is used for sensing the change of the inner diameter of the marrow cavity and sending a deformation signal; the positioning mechanism is arranged on the outer side wall of the second end of therod body 100 and used for an external optical positioning device to capture the position to obtain position information and obtain the marrow cavity polishing depth through calculation; the first main control module is arranged in the inner cavity, is electrically connected with therebounding mechanism 200 and is used for calculating the inner diameter of the marrow cavity. Stretch into the marrow intracavity with the first end of the body ofrod 100, convey first host system through the deformation signal on theresilience mechanism 200, first host system calculates the marrow chamber internal diameter in real time, thereby realize the real-time measurement to the marrow chamber internal diameter, optical positioning device carries out the position through the positioning mechanism to body ofrod 100 second end lateral wall and catches and carry out the real-time measurement of the degree of depth of polishing, device easy operation, and can convenient internal diameter and the degree of depth of polishing that measure the marrow wall simultaneously, the practicality has been improved.
Referring to fig. 3, it can be understood that therebounding mechanism 200 includes anelastic sheet 210, areturn spring 220 and apressure sensor 230, theelastic sheet 210 is disposed on an outer side wall of a first end of therod body 100, thereturn spring 220 and thepressure sensor 230 are disposed in an inner cavity of therod body 100, one end of thereturn spring 220 is connected with theelastic sheet 210, the other end of the return spring is connected with thepressure sensor 230, the first main control module is electrically connected with thepressure sensor 230, when therebounding mechanism 200 extends into a marrow cavity, the inner wall of the marrow cavity compresses theelastic sheet 210 toward the inside of therod body 100, thereby driving thereturn spring 220 to be pressed downwards, thepressure sensor 230 transmits a sensed pressure signal to the first main control module in a real-time electric signal manner to perform subsequent calculation processing, the device is taken out after.
Specifically, the height that theshell fragment 210 is close to the one end of positioning mechanism is greater than the height that the one end that positioning mechanism was kept away from toshell fragment 210 to make things convenient forshell fragment 210 to stretch into the marrow intracavity better, simultaneously,shell fragment 210's adoption fillet structure, in order to avoid having the damage to the marrow intracavity to some extent, improved user experience.
Referring to fig. 1 and 2, it can be understood that the positioning mechanism includes anoptical positioning ball 310 and a connectingpiece 320, the connectingpiece 320 is disposed on the second sidewall of therod body 100, theoptical positioning ball 310 is disposed on a side of the connectingpiece 320 away from therebounding mechanism 200, and theoptical positioning ball 310 is used for the optical positioning device to capture the position information. The optical locating device calculates the grinding depth of the marrow cavity by detecting the position information that theoptical locating ball 310 does not extend into the marrow cavity and extends into the marrow cavity.
It should be noted that the number of theelastic pieces 210 and theoptical positioning balls 310 is not limited herein, and may be adjusted according to the actual use situation.
Referring to fig. 1, it can be understood that therod body 100 includes a first connectingportion 110, a second connectingportion 120 and atip portion 130, the first connectingportion 110 and thetip portion 130 are respectively disposed at two ends of the second connectingportion 120, the positioning mechanism is disposed on an outer side wall of the first connectingportion 110, theresilient mechanism 200 is disposed on an outer side wall disposed at one end of the second connectingportion 120 close to thetip portion 130, specifically, the first connectingportion 110 and the second connectingportion 120 and thetip portion 130 are detachably connected, it is convenient to replace or maintain the internal components such as the first main control module and thepressure sensor 230, and thetip portion 130 is disposed so that the device can go deep into a narrow and small position of the end in the marrow cavity, and the measurement result is more accurate.
It should be noted that the size and height of thetip 130 may be varied as desired, and that different options for measuring different types of bone marrow cavity measurements may be provided, which are not limited in this application.
It can be understood that the device for measuring the inner diameter of the marrow cavity and the polishing depth further includes adisplay module 400, thedisplay module 400 is disposed on the outer sidewall of therod body 100, specifically, thedisplay module 400 is disposed on the outer sidewall of the second connectingportion 120, thedisplay module 400 is used for displaying the inner diameter of the marrow cavity in real time, thedisplay module 400 may be an LCD1602 liquidcrystal display module 400, an OLED display module, a touch screen, and the like, which are not limited in this application, and those skilled in the art select the inner diameter and the polishing depth according to actual situations.
It can be understood that the device for measuring the inner diameter of the medullary cavity and the polishing depth further comprises acontrol panel 500, thecontrol panel 500 is electrically connected to the first main control module, and buttons for starting up, shutting down, starting up the test and stopping are provided on thecontrol panel 500, of course, thecontrol panel 500 may be combined with thedisplay module 400 of the above embodiment, for example, a touch screen, to directly perform control operation on the screen, which is not limited in the present application, and a person skilled in the art selects the control panel according to actual situations.
In a second aspect, the present application further provides a medullary cavity inner diameter and polishing depth measuring system, including: the optical positioning device comprises an optical positioning sensor and a second main control module, the optical positioning sensor and the second main control module can be point-understood, the optical positioning sensor is used for capturing position information of a positioning mechanism, specifically, position information of an optical positioning ball 310 is not grabbed, the second main control module is used for calculating the grinding depth of the bone marrow cavity, specifically, the optical positioning sensor can be a motion catcher, an NDI (non-destructive interference) optical navigator and the like and is used for capturing the optical positioning ball 310, a first end of a rod body 100 extends into the bone marrow cavity and transmits a deformation signal on a rebound mechanism 200 to the first main control module, the first main control module calculates the inner diameter of the bone marrow cavity in real time, so that the inner diameter of the bone marrow cavity is measured in real time, the optical positioning sensor performs position capture on a positioning mechanism on the side wall of a second end of the rod body 100 and performs counting through the second main control module The grinding depth is calculated, the real-time measurement of the inner diameter of the marrow cavity is realized, the device is simple to operate, the inner diameter and the grinding depth of the marrow wall can be conveniently and simultaneously measured, and the practicability is improved.
In a third aspect, referring to fig. 4, fig. 4 is a flowchart of a method for measuring an inner diameter of a bone marrow cavity according to an embodiment of the third aspect of the present application, and the present application further proposes a method for measuring an inner diameter of a bone marrow cavity, which includes, but is not limited to, step S110, step S120, and step S130:
step S110: and acquiring the original diameter of the rebound mechanism which does not extend into the marrow cavity.
Referring to fig. 2, it can be understood that the original diameter refers to the diameter of theresilient sheet 210 in theresilient mechanism 200 when it is not compressed, for example, the original diameter is denoted as d0And transmitting the original diameter data to the first master control module.
Step S120: and acquiring a deformation signal of the pressure sensor on the springback mechanism extending into the marrow cavity.
It can be understood that, when therebounding mechanism 200 is inserted into the medullary cavity, the inner wall of the medullary cavity compresses thespring sheet 210, thespring sheet 210 applies a pressing force to thereturn spring 220, thereturn spring 220 transmits the pressing force of thespring sheet 210 to thepressure sensor 230 connected to the other end, and thepressure sensor 230 transmits a deformation signal of the sensed pressure F to the first main control module.
Step S130: and calculating the inner diameter change data of the marrow cavity according to the original diameter and the deformation signal.
It can be understood that, the first main control module receives the deformation signal of the pressure F received by theelastic sheet 210, the stiffness coefficient k of thereturn spring 220 is a fixed coefficient, and is preset in the first main control module, and the compressed length of theelastic sheet 210 can be calculated through hooke's law:
Δx＝F/k，
where Δ x is the compressed length of thespring 210, the inner diameter of the medullary cavity where thespring 210 is located can be calculated according to the original diameter and the compressed length of the spring 210:
d＝d0-2*Δx，
the method for measuring the inner diameter of the marrow cavity does not need complex operation, is simple and convenient, and has accurate and timely measuring results.
It should be noted that, in the actual test, the device for measuring the inner diameter of the medullary cavity and the polishing depth is provided with a plurality ofspring pieces 210, and there are a plurality of sets of measured inner diameter data of the medullary cavity, at this time, the user may select data according to the requirement, for example, select the maximum value, the minimum value, the average value of all the inner diameter data of the medullary cavity or the inner diameter value obtained by other calculation methods, which is not limited in the present application, and the skilled person in the art selects according to the actual situation.
It is understood that the following steps are also included, but not limited to: the data of the inner diameter variation of the marrow cavity is transmitted to thedisplay module 400. Thedisplay module 400 displays the data of the inner diameter of the marrow cavity in real time.
Fourth aspect, referring to fig. 5, fig. 5 is a flowchart of a method for measuring a grinding depth of an intramedullary canal according to an embodiment of the fourth aspect of the present application, and the present application further proposes a method for measuring a grinding depth of an intramedullary canal, which includes, but is not limited to, step S210, step S220, and step S230:
step S210: and acquiring the original position information of the optical positioning ball on the positioning mechanism just before the optical positioning ball extends into the marrow cavity.
When thespring 210 starts to enter the bone marrow cavity, the optical positioning device detects the position of theoptical positioning ball 310 to obtain the original position information, for example, mark point a on theoptical positioning ball 310, and record the coordinate a of theoptical positioning ball 310 when thespring 210 just extends into the bone marrow cavity0(x0,y0,z0) And coordinate A0(x0,y0,z0) The original position information is transmitted to the second main control module.
Step S220: acquiring the change position information of the optical positioning ball which extends into the marrow cavity.
When thespring 210 has entered the medullary cavity, the optical positioning device detects the position of theoptical positioning ball 310 to obtain the changed position information, for example, mark point a on theoptical positioning ball 310, and record the coordinate a of theoptical positioning ball 310 when thespring 210 just extends into the medullary cavitym(xm,ym,zm) And coordinate Am(xm,ym,zm) The changed position information is transmitted to the second main control module.
Step S230: and calculating the grinding depth change data of the marrow cavity according to the original position and the change position.
The second main control module receives the original position information coordinate A0(x0,y0,z0) And change the position information Am(xm,ym,zm) Calculating A by the formula0And AmS distance of1：
The real-time position information of the mark point A can be calculated in real time, when thetip part 130 contacts the bottom of the marrow cavity, the height of the tip is preset in the second main control module, the height of the tip is recorded as delta S, and then the grinding depth S of the marrow cavity is calculated through a formula:
S＝S1+ΔS+ε，
wherein epsilon is an allowable medullary cavity insertion depth error, the method for measuring the medullary cavity polishing depth does not need complex operation, is simple and convenient, and has accurate and timely measurement results.
It should be noted that, in the actual test, the device for measuring the inner diameter and the polishing depth of the medullary cavity is provided with a plurality ofoptical positioning balls 310, and there are a plurality of groups of measured data of the polishing depth of the medullary cavity, at this time, the user may select data according to the requirement, for example, select the maximum value, the minimum value, the average value of all data of the inner diameter of the medullary cavity or the value of the inner diameter calculated by other methods, which is not limited in the present application, and the skilled person in the art selects the data according to the actual situation.
In a fifth aspect, another embodiment of the present application further provides a computer-readable storage medium storing computer-executable instructions, which are executed by a processor or a controller, for example, by a processor in the above-mentioned one-chip microcomputer embodiment, and enable the processor to execute the intramedullary canal inner diameter measuring method or the intramedullary canal grinding depth measuring method in the above-mentioned embodiment, for example, execute the above-mentioned method steps S110 to S130 in fig. 4 and the method steps S210 to S230 in fig. 5.
One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
The embodiments of the present application have been described in detail with reference to the drawings, but the present application is not limited to the embodiments, and various changes can be made without departing from the spirit of the present application within the knowledge of those skilled in the art.
Claims (10)
1. The utility model provides a marrow cavity internal diameter and depth of polish measuring device which characterized in that includes:
the rod body is of a hollow structure, and an inner cavity is formed in the rod body;
the rebounding mechanism is arranged on the outer side wall of the first end of the rod body and used for sensing the change of the inner diameter of the marrow cavity and sending a deformation signal;
the positioning mechanism is arranged on the outer side wall of the second end of the rod body and used for an external optical positioning device to capture the position and obtain position information, and the grinding depth of the marrow cavity is calculated through the position information;
the first main control module is arranged in the inner cavity and electrically connected with the rebounding mechanism, and the first main control module is used for calculating the inner diameter of the medullary cavity according to the deformation signal.
2. The device of claim 1, wherein the resilient mechanism comprises an elastic sheet, a return spring and a pressure sensor, the elastic sheet is arranged on the outer side wall of the first end of the rod body, the return spring and the pressure sensor are arranged in the inner cavity, one end of the return spring is connected with the elastic sheet, the other end of the return spring is connected with the pressure sensor, and the first main control module is electrically connected with the pressure sensor.
3. The device of claim 1, wherein the positioning mechanism comprises an optical positioning ball and a connecting plate, the connecting plate is disposed on a side wall of the second end of the rod body, the optical positioning ball is disposed on a side of the connecting plate away from the resilient mechanism, and the optical positioning ball is used for the optical positioning device to capture position information.
4. The intramedullary canal inner diameter and sanding depth measuring device of claim 1, wherein the rod body comprises a first connecting portion, a second connecting portion and a tip portion, the first connecting portion and the tip portion are respectively disposed at two ends of the second connecting portion, the positioning mechanism is disposed at the first connecting portion, and the resilient mechanism is disposed at an outer side wall of one end of the second connecting portion close to the tip portion.
5. The device of claim 1, further comprising a display module, wherein the display module is disposed on the sidewall of the rod body and electrically connected to the first main control module for displaying the inner diameter of the bone marrow cavity.
6. The device of claim 1, further comprising a control panel electrically connected to the first master control module.
7. The utility model provides a marrow cavity internal diameter and depth of polish measurement system which characterized in that includes: the device for measuring the inner diameter and the polishing depth of the bone marrow cavity of any one of claims 1 to 6, wherein the optical positioning device comprises an optical positioning sensor and a second master control module, the optical positioning sensor is electrically connected with the second master control module, the optical positioning sensor is used for capturing the position information of the positioning mechanism, and the second master control module is used for calculating the polishing depth of the bone marrow cavity.
8. The method for measuring the inner diameter of the marrow cavity is characterized by being applied to a system for measuring the inner diameter of the marrow cavity with a rebound mechanism and a polishing depth, and comprising the following steps of:
acquiring the original diameter of the rebound mechanism which does not extend into a medullary cavity;
acquiring a deformation signal of a pressure sensor on the rebound mechanism extending into a medullary cavity;
and calculating the inner diameter change data of the marrow cavity according to the original diameter and the deformation signal.
9. A method for measuring the grinding depth of a medullary cavity is characterized in that the method is applied to a measuring system with a positioning mechanism for the inner diameter and the grinding depth of the medullary cavity, and comprises the following steps:
acquiring original position information of an optical positioning ball on the positioning mechanism just before the optical positioning ball extends into a marrow cavity;
acquiring the change position information of the optical positioning ball which extends into the marrow cavity;
and calculating the grinding depth change data of the marrow cavity according to the original position and the change position.
10. A computer-readable storage medium storing computer-executable instructions for causing a computer to perform the intramedullary canal inner diameter measurement method of claim 8 or the intramedullary canal sanding depth measurement method of claim 9.
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