A method and system for measuring cervical range of motion

Abstract

The present invention discloses a method and system for measuring the cervical range of motion, including: collecting the facial features of the eyes and mouth of the subject to construct an isosceles triangle according to the three-point method; after positioning the subject according to the first deformation feature of the isosceles triangle, collecting the second deformation feature of the isosceles triangle during the processes of the subject's cervical flexion, extension, lateral flexion and rotation; obtaining the cervical range of motion of the subject according to the second deformation feature, wherein the cervical range of motion is used to represent the flexion, extension, lateral flexion and rotation angles of the human neck; the present invention realizes the intelligent measurement of the cervical range of motion of the subject, avoids the errors caused by manual operation, and introduces the relationship features of the shoulder and neck, ensuring the objectivity of the measurement result, and providing an objective and accurate data basis for the auxiliary diagnosis and treatment work of judging the lesion degree of the cervical vertebra and neck muscles.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent detection of cervical range of motion, and particularly to a method and system for measuring cervical range of motion. Background Art

[0002] Cervical range of motion refers to the anterior flexion, posterior extension, lateral flexion and rotation angles of the human neck. In clinical work, it is often necessary to measure the cervical range of motion of the human body to evaluate the neck function and assist in judging the degree of lesions of the cervical vertebrae and neck muscles. Conventional cervical range of motion measurements are all judged by the naked eye through an angle ruler, lacking accuracy and standardization. There are also those using a gravity angle device for measurement, which is inconvenient to operate and will also produce measurement errors among different individuals due to the difference in the placement position of the gravity angle measurement device during measurement; therefore, there is an urgent need for a method and system for measuring cervical range of motion to avoid errors caused by manual measurement through intelligent design. Summary of the Invention

[0003] In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a method and system for measuring cervical range of motion, which realizes the positioning of the initial position of the cervical vertebra and the data accuracy in the subsequent measurement of cervical range of motion through the positioning operation of the isosceles triangle on the face and supplemented by shoulder and neck features.

[0004] In order to achieve the above technical purpose, the present invention provides a method for measuring cervical range of motion, including the following steps:

[0005] Collect the facial features of the eyes and mouth of the person to be measured, and construct an isosceles triangle based on the three-point method;

[0006] After positioning the person to be measured according to the first deformation feature of the isosceles triangle, collect the second deformation feature of the isosceles triangle during the processes of anterior flexion, posterior extension, lateral flexion and rotation of the neck of the person to be measured;

[0007] Obtain the cervical range of motion of the person to be measured according to the second deformation feature, where the cervical range of motion is used to represent the anterior flexion, posterior extension, lateral flexion and rotation angles of the human neck.

[0008] Preferably, during the process of collecting the facial features of the eyes and mouth, a first image acquisition unit is set based on the facial position of the person to be measured for collecting the frontal facial image of the person to be measured;

[0009] Based on the first image acquisition unit, a plurality of second image acquisition units are set to assist the first image acquisition unit to obtain the facial features of the eyes and mouth. Among them, by adjusting the positions of the first image acquisition unit and / or the second image acquisition units, the facial features are obtained through the frontal facial image, and an isosceles triangle is constructed based on the three-point method.

[0010] Preferably, during the construction of an isosceles triangle, according to facial features and based on the three-point method, a triangle is constructed;

[0011] Based on the triangle, a first deformation feature is obtained. By adjusting the first deformation feature, the triangle is controlled to form an isosceles triangle, thereby completing the positioning of the subject.

[0012] Preferably, during the process of controlling the triangle to form an isosceles triangle, by adjusting the head position of the subject, the adjustment of the first deformation feature is completed, and an isosceles triangle is formed;

[0013] Or, by adjusting the triangle, the adjustment of the first deformation feature is completed, and an isosceles triangle is formed.

[0014] Preferably, during the process of obtaining the cervical range of motion, the subject is controlled to perform neck flexion, extension, lateral flexion, and rotation movements while keeping the trunk and shoulder positions stationary. The maximum angle position is reached for each movement angle, and the deformation amount of the isosceles triangle based on the maximum angle position is obtained as the second deformation feature to generate the cervical range of motion.

[0015] Preferably, during the process of forming an isosceles triangle, the first angle between the shoulder and the face of the subject, and the second angle between the shoulder and the neck of the subject are collected. Among them, the first angle is used to represent the lateral inclination angle of the shoulder and the face in the coronal plane, and the second angle is used to represent the flexion and extension angle of the shoulder and the head of the subject in the sagittal plane;

[0016] Based on the first angle and the second angle, according to the first deformation feature, the triangle is adjusted to form an isosceles triangle, thereby completing the positioning of the subject.

[0017] Preferably, during the process of obtaining the cervical range of motion, the first variable of the first angle and the second variable of the second angle are obtained during the neck flexion, extension, lateral flexion, and rotation movements of the subject;

[0018] According to the first variable and the second variable, based on the second deformation feature obtained during the neck flexion, extension, lateral flexion, and rotation movements of the subject, the cervical range of motion is generated.

[0019] The present invention discloses a measurement system for cervical range of motion, including:

[0020] A first data acquisition module for acquiring the facial image of the subject;

[0021] A first data processing module for obtaining the facial features of the eyes and mouth of the subject according to the facial image and constructing an isosceles triangle based on the three-point method;

[0022] A positioning module for positioning the subject according to the first deformation feature of the isosceles triangle;

[0023] An instruction control module, which is used to send control instructions to the subject after positioning is completed, so that the subject performs neck flexion, extension, lateral flexion and rotation activities;

[0024] A second data acquisition module, which is used to acquire the deformed graphics formed by the deformation of the isosceles triangle during the neck flexion, extension, lateral flexion and rotation activities of the subject;

[0025] A second data processing module, which is used to obtain the second deformation characteristics of the isosceles triangle according to the deformed graphics;

[0026] A result calculation module, which is used to obtain the cervical range of motion of the subject according to the second deformation characteristics, wherein the cervical range of motion is used to represent the flexion, extension, lateral flexion and rotation angles of the human neck.

[0027] Preferably, the first data acquisition module includes: a first image acquisition unit and a second image acquisition unit;

[0028] The first image acquisition unit is used to acquire the frontal face image of the subject;

[0029] The second image acquisition unit is used to assist the first image acquisition unit to obtain the facial features of the eyes and mouth;

[0030] The first data processing module is further used to adjust the positions of the first image acquisition unit and / or the second image acquisition unit, obtain facial features according to the frontal face image, and construct an isosceles triangle based on the three-point method.

[0031] Preferably, the positioning module is further used to collect the first angle between the shoulder and the face of the subject, and the second angle between the shoulder and the neck of the subject through the first data acquisition module; and based on the first angle and the second angle, adjust the triangle according to the first deformation characteristics to form an isosceles triangle, and complete the positioning of the subject;

[0032] The result settlement module is further used to obtain the first variable of the first angle and the second variable of the second angle during the neck flexion, extension, lateral flexion and rotation activities of the subject through the second data acquisition module and the second data processing module; and according to the first variable and the second variable, generate the cervical range of motion based on the second deformation characteristics obtained during the neck flexion, extension, lateral flexion and rotation activities of the subject.

[0033] Compared with the prior art, the present invention has the following technical effects:

[0034] The present invention realizes the intelligent measurement of the cervical range of motion of the subject, avoids the errors caused by manual operation, and introduces the relationship characteristics of the shoulder and neck, ensuring the objectivity of the measurement results, and providing an objective and accurate data basis for the auxiliary diagnosis and treatment work of judging the lesion degree of the cervical vertebra and neck muscles. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 It is a schematic flowchart of the method described in the present invention;

[0037] Figure 2 It is a schematic structural diagram of the system described in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] In order to make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Usually, the components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application required to be protected, but only represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0039] As Figure 1-2 shown, the present invention provides a method for measuring the cervical range of motion, including the following steps:

[0040] Collect the facial features of the subject's eyes and mouth, and construct an isosceles triangle according to the three-point method;

[0041] After positioning the subject according to the first deformation feature of the isosceles triangle, collect the second deformation feature of the isosceles triangle during the processes of the subject's neck flexion, extension, lateral flexion, and rotation activities;

[0042] Obtain the cervical range of motion of the subject according to the second deformation feature, where the cervical range of motion is used to represent the flexion, extension, lateral flexion, and rotation angles of the human neck.

[0043] Further preferably, in the process of collecting the facial features of both eyes and the mouth, a first image acquisition unit is set based on the facial position of the subject to collect the frontal facial image of the subject;

[0044] Based on the first image acquisition unit, a plurality of second image acquisition units are set to assist the first image acquisition unit to obtain the facial features of both eyes and the mouth. Among them, by adjusting the positions of the first image acquisition unit and / or the second image acquisition units, the facial features are obtained through the frontal facial image, and an isosceles triangle is constructed according to the three-point method.

[0045] Further preferably, in the process of constructing the isosceles triangle, the present invention constructs a triangle according to the facial features and the three-point method;

[0046] Based on the triangle, a first deformation feature is obtained, and by adjusting the first deformation feature, the triangle is controlled to form an isosceles triangle, thereby completing the positioning of the subject.

[0047] Further preferably, in the process of controlling the triangle to form an isosceles triangle, the present invention adjusts the head position of the subject, and then completes the adjustment of the first deformation feature to form an isosceles triangle;

[0048] Or, by adjusting the triangle, the adjustment of the first deformation feature is completed, and an isosceles triangle is formed.

[0049] Further preferably, in the process of obtaining the cervical range of motion, the present invention controls the subject to perform neck flexion, extension, lateral flexion and rotation activities while keeping the trunk and shoulder positions unchanged through instructions or commands. The maximum angle position is reached for each activity angle, and the deformation amount of the isosceles triangle based on the maximum angle position is obtained as the second deformation feature, and the cervical range of motion is generated.

[0050] During the activity process, it is difficult to ensure that the trunk and shoulder positions remain unchanged. Therefore, as another alternative solution of the present invention, the following is provided:

[0051] In the process of forming the isosceles triangle, the first included angle between the shoulder and the face of the subject, and the second included angle between the shoulder and the neck of the subject are collected. The first included angle is used to represent the lateral inclination angle of the shoulder and the face in the coronal plane, and the second included angle is used to represent the flexion and extension angle of the shoulder and the head of the subject in the sagittal plane;

[0052] Based on the first included angle and the second included angle, and according to the first deformation feature, the triangle is adjusted to form an isosceles triangle, thereby completing the positioning of the subject.

[0053] Based on the positioning technology through the first angle and the second angle, further preferably, during the process of obtaining the cervical range of motion, the first variable of the first angle and the second variable of the second angle are obtained while the subject is performing neck flexion, extension, lateral flexion, and rotation activities;

[0054] According to the first variable and the second variable, and based on the second deformation feature obtained while the subject is performing neck flexion, extension, lateral flexion, and rotation activities, the cervical range of motion is generated.

[0055] The present invention discloses a measurement system for cervical range of motion, including:

[0056] A first data acquisition module for acquiring the facial image of the subject;

[0057] A first data processing module for obtaining the facial features of the subject's eyes and mouth according to the facial image, and constructing an isosceles triangle based on the three-point method;

[0058] A positioning module for positioning the subject according to the first deformation feature of the isosceles triangle;

[0059] An instruction control module for sending a control instruction to the subject after positioning, so that the subject performs neck flexion, extension, lateral flexion, and rotation activities;

[0060] A second data acquisition module for acquiring the deformed figure formed by the deformation of the isosceles triangle while the subject is performing neck flexion, extension, lateral flexion, and rotation activities;

[0061] A second data processing module for obtaining the second deformation feature of the isosceles triangle according to the deformed figure;

[0062] A result calculation module for obtaining the cervical range of motion of the subject according to the second deformation feature, where the cervical range of motion is used to represent the flexion, extension, lateral flexion, and rotation angles of the human neck.

[0063] Further preferably, the first data acquisition module mentioned in the present invention includes: a first image acquisition unit and a second image acquisition unit;

[0064] The first image acquisition unit for acquiring the frontal facial image of the subject;

[0065] The second image acquisition unit for assisting the first image acquisition unit to obtain the facial features of the eyes and mouth;

[0066] The first data processing module is further configured to adjust the positions of the first image acquisition unit and / or the second image acquisition unit, obtain the facial features according to the frontal facial image, and construct an isosceles triangle based on the three-point method.

[0067] Further preferably, the positioning module mentioned in the present invention is further configured to collect, through the first data acquisition module, a first angle between the shoulder and the face of the subject, and a second angle between the shoulder and the neck of the subject; and based on the first angle and the second angle, and according to the first deformation feature, adjust the triangle to form an isosceles triangle, thereby completing the positioning of the subject.

[0068] The result settlement module mentioned in the present invention is further configured to obtain, through the second data acquisition module and the second data processing module, a first variable of the first angle and a second variable of the second angle during the processes of forward flexion, backward extension, lateral flexion, and rotation of the subject's neck; and according to the first variable and the second variable, and based on the second deformation feature obtained during the processes of forward flexion, backward extension, lateral flexion, and rotation of the subject's neck, generate the cervical range of motion.

[0069] The present invention also implements the logical process of the method for measuring the cervical range of motion through a computer program, and forms an executable program, which is embedded in an intelligent device with an image acquisition and positioning function, so that the device can be used for measuring the cervical range of motion of the subject, and further assist in analyzing the cervical lesion condition of the subject.

[0070] The present invention also designs a removable storage device for carrying the measurement system for the cervical range of motion. By performing data interaction with other devices with an image acquisition function, as a peripheral device of the above-mentioned device, it enables the measurement of the cervical range of motion of the subject, thereby providing objective data for the cervical lesion condition of the subject, and combining the analysis algorithm of the device, and obtaining the cervical lesion condition of the subject through the objective data.

[0071] Example 1: After the present invention takes a photo of the human face through a high-speed camera, through an image recognition algorithm, the computer automatically recognizes the facial features of the eyes and mouth in the photo, and constructs an isosceles triangle by the three-point method (using the eyes and mouth as the three points), then calculates the deformation features of the isosceles triangle in the photo at different angles of the human face, and then uses trigonometric functions to calculate the cervical range of motion.

[0072] For the recognition of the facial features of the eyes and mouth, the main purpose is for positioning. According to the features of the eyes and mouth, the human face is positively positioned to determine the initial position of the cervical vertebra. The specific process is as follows:

[0073] After instructing the subject to face the detection device, keep the back straight, look straight ahead, and start the device.

[0074] Collect the eye and mouth features of the subject, construct an isosceles triangle based on the eye and mouth features by the three-point method, and adjust the posture of the subject by analyzing the deformation features of the isosceles triangle, so that the subject faces the detection device directly, thereby completing the positioning work of the subject.

[0075] However, during the above positioning process, when the subject has a head tilt and cannot straighten it, a good positioning effect cannot be achieved. Therefore, in order to overcome the problems existing in the subject himself, based on facial features, the present invention introduces shoulder feature recognition, so that during the head positioning process, the positioning accuracy will be more accurate, and the subject does not need to straighten the posture. As long as the subject faces the measuring instrument, the positioning can be achieved. The specific positioning process is as follows:

[0076] Instruct the subject to sit in front of the detection device, ensure that the front of the subject faces the detection device, and start the device;

[0077] Collect the eye and mouth features of the subject, and then determine whether the subject has the symptom of head tilt. If so, collect the included angle features between the shoulder and the neck, and then judge the head offset of the subject, and combine the features of the eyes and mouth to position the subject and determine the initial position of his cervical vertebra. An isosceles triangle based on the eye and mouth features is constructed by the three-point method. By obtaining the deformation features of the isosceles triangle, the detection device is automatically adjusted to align the front of the device with the subject, realizing the positioning work of the detector.

[0078] The above detection device mainly includes two parts. The first part is four cameras respectively placed in the front, 45° obliquely above, 45° obliquely to the left, and 45° obliquely to the right of the human face; the second part is a calculation and analysis system, which is used to position the subject and calculate the cervical spine mobility of the subject by collecting the data of the first part. Because in the actual implementation process, it is necessary to measure 6 angle values of neck flexion (lowering the head), extension (raising the head), left lateral flexion (tilting to the left), right lateral flexion (tilting to the right), left rotation (turning to the left), and right rotation (turning to the right), so placing one camera may cause insufficient collection of facial features. Therefore, several cameras with fixed angles can be designed to capture the face, and then angle compensation can be performed through a specific algorithm to enhance the positioning and recognition effect. Of course, in the calculation and analysis system of the above device, the algorithm of big data can also be introduced to associate the cervical spine mobility with the actual condition, or diagnose by measuring certain features to assist in the diagnosis of the subject. Furthermore, the intelligent design of the detection device can be realized, and the degree of lesions of the cervical spine and neck muscles can be assisted in judgment by means of artificial intelligence, providing an objective reference basis for the diagnosis.

[0079] After the positioning of the subject is completed, the subject is instructed and guided to perform neck flexion, extension, lateral flexion, and rotation activities while keeping the trunk and shoulder positions unchanged, and ensure that each movement can reach the maximum movement angle position. There is a camera at the front, 45° obliquely above, 45° obliquely to the left, and 45° obliquely to the right of the face (because the maximum neck rotation angle of normal people is about 45°-75°) to take pictures of the face. Finally, according to the deformation of the isosceles triangle under each movement, the neck rotation angle of the subject is analyzed, and then the cervical range of motion of the subject is obtained.

[0080] During the above measurement process, it is difficult to ensure that the trunk and shoulder positions of the subject remain unchanged. Therefore, the introduction of the characteristics of the first angle between the shoulder and the face and the second angle between the shoulder and the neck can effectively overcome this problem. During the face recognition process, the first angle and the second angle of the subject are synchronously collected. By obtaining the relationship between the first angle and the second angle, and the relationship between the first angle and the second angle and the deformation of the isosceles triangle on the face respectively. Furthermore, by obtaining the changes in the first angle and the second angle, the final measurement result is corrected, so that the cervical range of motion of the subject can be more accurate and in line with the actual situation of the subject.

[0081] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0082] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0083] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate for realizing the process Figure 1 one process or multiple processes and / or blocks Figure 1A device for the function specified in one or more boxes.

Claims

1. A method for measuring the range of motion of the cervical spine, characterized in that, Including the following steps: Collect the facial features of the eyes and mouth of the subject, and construct an isosceles triangle according to the three-point method; After positioning the subject according to the first deformation feature of the isosceles triangle, collect the second deformation feature of the isosceles triangle during the processes of the subject's neck flexion, extension, lateral flexion, and rotation; Obtain the cervical range of motion of the subject according to the second deformation feature, where the cervical range of motion is used to represent the flexion, extension, lateral flexion, and rotation angles of the human neck.

2. The method for measuring cervical range of motion according to claim 1, wherein: During the process of collecting the facial features of the eyes and mouth, set a first image acquisition unit based on the facial position of the subject for collecting the frontal face image of the subject; Based on the first image acquisition unit, set a plurality of second image acquisition units for assisting the first image acquisition unit to obtain the facial features of the eyes and the mouth. Among them, by adjusting the positions of the first image acquisition unit and / or the second image acquisition unit, obtain the facial features through the frontal face image, and construct an isosceles triangle according to the three-point method.

3. The method for measuring cervical range of motion according to claim 2, wherein: During the process of constructing the isosceles triangle, construct a triangle according to the three-point method based on the facial features; Obtain the first deformation feature according to the triangle, and control the triangle by adjusting the first deformation feature to form the isosceles triangle, thereby completing the positioning of the subject.

4. The method for measuring cervical range of motion according to claim 3, wherein: During the process of controlling the triangle to form an isosceles triangle, complete the adjustment of the first deformation feature by adjusting the head position of the subject, thereby forming the isosceles triangle; Or, complete the adjustment of the first deformation feature by adjusting the triangle, thereby forming the isosceles triangle.

5. The method for measuring cervical range of motion according to claim 4, wherein: During the process of forming the isosceles triangle, collect the first angle between the shoulder and the face of the subject, and the second angle between the shoulder and the neck of the subject. Among them, the first angle is used to represent the lateral inclination angle of the shoulder and the face in the coronal plane, and the second angle is used to represent the flexion and extension angle of the shoulder and the head of the subject in the sagittal plane; Based on the first angle and the second angle, adjust the triangle according to the first deformation feature to form the isosceles triangle, thereby completing the positioning of the subject.

6. The method for measuring cervical range of motion according to claim 4, wherein: During the process of obtaining the cervical range of motion, control the subject to keep the trunk and shoulder positions unchanged and perform neck flexion, extension, lateral flexion, and rotation activities. When each activity angle reaches the maximum angle position, obtain the deformation amount of the isosceles triangle based on the maximum angle position as the second deformation feature, and generate the cervical range of motion.

7. The measurement method for cervical range of motion according to claim 5, characterized in that: During the process of obtaining the cervical range of motion, the first variable of the first included angle and the second variable of the second included angle are obtained during the forward flexion, extension, lateral flexion and rotation activities of the neck of the subject; According to the first variable and the second variable, and based on the second deformation feature obtained during the forward flexion, extension, lateral flexion and rotation activities of the neck of the subject, the cervical range of motion is generated.

8. A measurement system for cervical range of motion, characterized in that, It includes: A first data acquisition module for acquiring the facial image of the subject; A first data processing module for obtaining the facial features of the eyes and mouth of the subject according to the facial image and constructing an isosceles triangle based on the three-point method; A positioning module for positioning the subject according to the first deformation feature of the isosceles triangle; An instruction control module for sending a control instruction to the subject after positioning is completed, so that the subject performs forward flexion, extension, lateral flexion and rotation activities of the neck; A second data acquisition module for acquiring the deformed figure formed by the deformation of the isosceles triangle during the forward flexion, extension, lateral flexion and rotation activities of the neck of the subject; A second data processing module for obtaining the second deformation feature of the isosceles triangle according to the deformed figure; A result calculation module for obtaining the cervical range of motion of the subject according to the second deformation feature, wherein the cervical range of motion is used to represent the forward flexion, extension, lateral flexion and rotation angles of the human neck.

9. The measurement system for cervical range of motion according to claim 8, characterized in that: The first data acquisition module includes: a first image acquisition unit and a second image acquisition unit; The first image acquisition unit is used to acquire the frontal facial image of the subject; The second image acquisition unit is used to assist the first image acquisition unit to obtain the facial features of the eyes and the mouth; The first data processing module is further used to adjust the positions of the first image acquisition unit and / or the second image acquisition unit, and obtain the facial features according to the frontal facial image, and construct an isosceles triangle based on the three-point method.

10. The measurement system for cervical range of motion according to claim 9, characterized in that: The positioning module is further used to acquire the first included angle between the shoulder and the face of the subject and the second included angle between the shoulder and the neck of the subject through the first data acquisition module; and based on the first included angle and the second included angle, adjust the triangle according to the first deformation feature to form the isosceles triangle, and complete the positioning of the subject. The result calculation module is further configured to obtain, through the second data acquisition module and the second data processing module, a first variable of the first included angle and a second variable of the second included angle during the processes of the subject's neck flexion, extension, lateral flexion, and rotation; and generate the cervical range of motion according to the first variable and the second variable based on obtaining the second deformation feature during the processes of the subject's neck flexion, extension, lateral flexion, and rotation.

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