Close-range ligament tension measuring device for biomechanical test
By designing a proximal ligament tension measuring device for biomechanical testing, including a tensile stress sensor and a variety of fixing screws, the problem of difficulty in measuring ligament tension in existing equipment is solved, and precise measurement of proximal ligament tension and the satisfaction of a variety of application requirements is achieved.
Patent Information
- Application Number
- CN202510127239.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-01
- Publication Date
- 2025-03-28
AI Technical Summary
It is difficult for existing equipment to accurately measure ligament tension in biomechanical tests with close distance between the bones at both ends of the ligament, relatively small movement, and complex anatomical structure around them.
A close-range ligament tension measuring device is designed, including a tensile compressive stress sensor, a rigid frame, a sleeve spacing adjustment bolt, an adjustable spacing sleeve, a matching fixing screw and an external tensile compressive stress display instrument. The device realizes accurate measurement of close-range ligament tension by sensing the tension between the fixing screws.
The device can accurately measure ligament tension between two points in biomechanical tests, and provides a variety of fixing screws to adapt to anchoring needs in different parts, improving the accuracy and convenience of measuring ligament tension.
Smart Images
Figure CN119700122A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of electronic technology and equipment, in particular to a short-distance ligament tension measuring device used in biomechanical tests, so as to realize accurate measurement of the ligament tension between two short-distance points in the biomechanical tests. Background Art
[0002] In biomechanical research, the method of measuring the tension (specifically expressed as pulling force and pressure) between two points of the attached ligament, especially the measurement of the tension of some ligaments with close spacing, small relative movement between the bones at both ends of the ligament, and complex surrounding anatomical structures, is of great significance for studying the burden of each ligament under different postures and physiological conditions. Especially for subjects such as the spine and foot and ankle, two bones can be connected by multiple ligaments. How to achieve the change of ligament tension under physiological conditions, single ligaments, different loads and postures is not only of great significance for the quantitative research of biomechanics and sports mechanics, but also can provide quantitative data on the change of ligament tension, which can be used to guide the basic research of physiological and pathological changes of ligament cells under different stress stimuli.
[0003] Currently, the types of equipment used to measure the tension between two points of an attached ligament are relatively limited. These types of equipment mainly include: (1) directly measuring the tension between two points using a spring dynamometer; (2) using finite element analysis to indirectly infer the tension or pressure borne by a structure by comprehensively analyzing the magnitude and direction of the applied stress, as well as the relative displacement and deformation of the measured object.
[0004] If the above devices are used in biomechanical tests, their corresponding defects are mainly: (1) The devices are bulky and too large to measure the tension of ligaments with small spacing, and they cannot even be placed between complex surrounding anatomical structures; (2) The devices have large deformation, which is not convenient for measuring the tension of ligaments with small relative movement between the two ends of the bones under physiological conditions; (3) For some structures with small relative displacement and deformation, the accuracy of the tension change value indirectly obtained by finite element analysis is low. In summary, the existing equipment still has defects in the convenience, practicality, and accuracy of biomechanical testing. It is difficult to effectively measure the tension of ligaments with close spacing between the two ends of the bones, small relative movement between the two ends of the bones, and complex surrounding anatomical structures. Therefore, the present invention is of great significance for realizing the accurate measurement of the tension of ligaments (such as the anterior and posterior cruciate ligaments of the knee joint, the yellow ligament of the spine, etc.) between two points at close distances in biomechanical tests. Summary of the invention
[0005] The main technical problem solved by the present invention is to provide a close-range ligament tension measurement device for biomechanical experiments, so as to solve the problem that the existing tension measurement equipment between two points of attached ligaments is difficult to effectively and accurately measure the ligament tension when the distance between the bones at both ends of the ligament is close, the relative movement between the bones at both ends of the ligament is small, and the surrounding anatomical structure is complex.
[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is to provide a close-range ligament tension measurement device for biomechanical experiments, which is composed of a tensile and compressive stress sensor, a rigid frame, a sleeve spacing adjustment bolt, an adjustable spacing sleeve, a matching fixing screw, and an external tensile and compressive stress display instrument. The tensile and compressive stress sensor senses the changes in the tensile and compressive forces between two fixing screws anchored to the bones at the attachment points at both ends of the ligament, and displays the stress parameters on the external tensile and compressive stress display instrument. At the same time, the anchoring part of the fixing screw has a variety of sizes and models to choose from to meet the needs of anchoring the fixing screw in different parts.
[0007] According to the function of the device described in the present invention, the device can accurately measure the tension of ligaments (such as the anterior and posterior cruciate ligaments of the knee joint, the yellow ligament of the spine, etc.) between two close points in biomechanical experiments, and provide various types of fixing screws, so that the anchoring part of the screw has a variety of size models to choose from, so as to meet the application needs of anchoring the fixing screws in different parts, which is of guiding significance for studying the burden of various ligaments under different postures and physiological states. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 It is a schematic diagram of the structure of the present invention;
[0009] Figure 2 It is a circuit logic block diagram of the present invention. DETAILED DESCRIPTION
[0010] The device of the present invention is intended to accurately measure the tension of ligaments (such as the anterior and posterior cruciate ligaments of the knee joint, the yellow ligament of the spine, etc.) between two points at close range in biomechanical tests. The tension and compression stress sensors sense the changes in tension and compression between two fixing screws anchored to the bones at the attachment points at both ends of the ligaments. By replacing different models of fixing screws, the application needs of anchoring the fixing screws at different parts are met. The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.
[0011] like Figure 1 , Figure 2As shown, the tensile and compressive stress sensor 1 adopts the LA-S2 tensile force sensor produced by Bengbu Leitai Sensor Co., Ltd., with a measuring range of no more than 10kg and a sensor size of 19.1×16×6.1 (mm), which meets the requirements for stress measurement between two points with a small pitch. The external tensile and compressive stress display instrument 2 adopts the Ouluda AD2016SC1 handheld force measuring instrument produced by Suzhou Ouluda Automation Equipment Co., Ltd. The tensile and compressive stress sensor 1 and the external tensile and compressive stress display instrument 2 are connected through an electrical connection 3 between the tensile and compressive stress sensor and the external tensile and compressive stress display instrument.
[0012] like Figure 1 As shown, the tensile and compressive stress sensor 1 and the rigid frame 4 are tightly connected through a rigid structure, the internal dimensions of the rigid frame 4 conform to the tensile and compressive stress sensor 1, and can move relative to the tensile and compressive stress sensor without resistance. The lower part of the rigid frame is provided with a sleeve 5 with adjustable spacing, the sleeve spacing can be adjusted by a sleeve spacing adjustment bolt 6, the sleeve 5 with adjustable spacing is firmly connected to the tail of the fixing screw 7 through a sleeve connection structure, and the anchoring part 8 of the fixing screw 7 has a variety of sizes and models to choose from to meet the needs of anchoring at different parts.
[0013] The user can screw the anchoring parts 8 of the two fixing screws into the bone to firmly anchor the fixing screws 7 at the bone attachment points at both ends of the ligament, and adjust the spacing of the sleeve 5 with adjustable spacing by rotating the sleeve spacing adjustment bolt 6 to make it match the spacing of the tail end connecting rod of the fixing screw 7, and connect the sleeve 5 with the tail end connecting rod of the fixing screw 7. When the tensile pressure between the two points changes, the tensile pressure sensor 1 picks up the tensile pressure change value, converts it into an electrical signal, and sends it to the external tensile and compressive stress display instrument 2 through the electrical connection 3 to display the tensile pressure value and change value.
[0014] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.
Claims
1. A close-range ligament tension measurement device for biomechanical testing, comprising a tensile and compressive stress sensor (1), an external tensile and compressive stress display instrument (2), a rigid frame (4), an adjustable spacing sleeve (5), a sleeve spacing adjustment bolt (6) and a matching fixing screw (7), characterized in that: The tensile and compressive stress sensor (1) and the external tensile and compressive stress display instrument (2) are electrically connected (3), and the tensile and compressive stress sensor (1) and the rigid frame (4) are tightly connected via a rigid structure.
2. The close-range ligament tension measuring device for biomechanical testing according to claim 1, characterized in that: A sleeve (5) with adjustable spacing is connected below the rigid frame (4), and the spacing of the sleeve (5) is adjusted by sleeve spacing adjustment bolts (6).
3. The close-range ligament tension measuring device for biomechanical testing according to claim 1, characterized in that: The tail of the matching fixing screw (7) is provided with a connecting rod, and the sleeve (5) with adjustable spacing can be securely sleeved on the connecting rod at the tail of the matching fixing screw (7).
4. The close-range ligament tension measuring device for biomechanical testing according to claim 1, characterized in that: The anchoring portion (8) of the matching fixing screw (7) has various sizes to choose from.