A method, device, medium and product for correcting initial error parameters of an automatic archwire bending device

Abstract

The present invention provides an initial error parameter correction method for an automatic archwire bending device, comprising the steps of: obtaining initial data, obtaining several groups of initial motor rotation angle data; measuring the actual angle, measuring the actual bending angle of the archwire after the automatic archwire bending device bends the archwire according to the initial motor rotation angle data; data fitting, fitting different types of equations with the actual bending angle of the archwire and the corresponding initial motor rotation angle data, evaluating the degree of fit of each equation, and finding the most relevant fitting curve equation as the final fitting function according to the degree of fit evaluation result; parameter correction, correcting the initial motor rotation angle data through the final fitting function. The present invention obtains a fitting function by inputting several groups of initial data and performing actual testing. When it is used formally later, the data value is input so that the final value is obtained through the fitting function to eliminate the rebound and various errors existing in the device itself.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a method, equipment, medium and product for correcting initial error parameters of an automatic archwire bending device. Background Art

[0002] Malocclusion is a common oral disease, which is mainly manifested in uneven tooth arrangement, abnormal jaw relationship between the upper and lower dental arches, and abnormal jaw size, shape and position. Fixed correction technology is currently a common and effective orthodontic treatment method. Fixed correction technology is mainly achieved by brackets and orthodontic archwires. The brackets are bonded to the tooth surface, and the shape memory function of the deformable archwire generates continuous biological force to move the teeth to be flat and restore normal occlusion. In the process of orthodontic correction, especially lingual fixed correction, it is often necessary to bend the archwires of different angles and put them into the lingual inclined groove brackets for use. At present, personalized lingual brackets are usually designed and manufactured digitally, which can make the brackets very thin and fit the tooth surface, giving patients a very good experience and allowing the brackets to better control the movement of teeth. However, this brings difficulties to the bending of the archwire. Because of the special shape of the lingual side of the teeth, and the groove of the bracket is shorter from the tooth surface, the bends on the archwire are much more than those on the labial side. In addition, in order to better control the movement during the correction process, the lingual archwire will be designed to increase the torque, which will also increase the difficulty of bending the archwire.

[0003] At present, the archwires used in orthodontic treatment are all manually bent, completely relying on the physician's experience. On the one hand, physicians often need a long period of archwire bending training to reach the standard; on the other hand, the shape and size of the manually bent archwires have large errors, manual bending is time-consuming and labor-intensive, and the bent archwires have high uncertainty and low precision.

[0004] Therefore, it is very necessary to study an automatic archwire bending device. However, the use of an archwire to automatically bend orthodontic archwires is an automated bending process, which requires an automatic archwire bending device to automatically generate a bending program for personalized orthodontic archwires. In the actual production process, orthodontic archwires are made of a variety of materials. In addition to stainless steel wires, the most commonly used are nickel-titanium alloy wires, titanium-molybdenum alloy wires, and Australian wires (Australian wires). Each archwire has a different elastic modulus. For orthodontic archwires with nonlinear stress and strain, the rebound angle of the archwire is different after each bending, and the current manual bending strategy is obtained by orthodontists who continuously optimize and improve their bending efficiency. Therefore, there is an urgent need for an initial error parameter correction method for an automatic archwire bending device to solve the problem that the rebound coefficient of each batch of orthodontic archwires in the actual production process is different, resulting in inaccurate angles when the archwire is bent. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide an initial error parameter correction method for an automatic arch wire bending device, which solves the problem that the rebound coefficient of each batch of orthodontic arch wires is different in the actual production process, resulting in inaccurate angles when the arch wire is bent.

[0006] The present invention provides a method for correcting initial error parameters of an archwire automatic bending device, comprising the following steps:

[0007] Obtain initial data, obtain several sets of initial motor rotation angle data;

[0008] Measuring the actual angle, measuring the actual bending angle of the archwire after the automatic archwire bending device bends the archwire according to the initial motor rotation angle data;

[0009] Data fitting, fitting different types of equations with the actual bending angle of the archwire and the corresponding initial motor rotation angle data, evaluating the fitting degree of each equation, and finding the most relevant fitting curve equation according to the fitting degree evaluation result as the final fitting function;

[0010] Parameter correction: correcting the initial motor rotation angle data through the final fitting function.

[0011] Furthermore, in the data fitting step, the equation types include straight line equations, quadratic polynomial equations, cubic polynomial equations, and quartic polynomial equations.

[0012] Furthermore, in the data fitting step, the least square method is used to fit different types of equations.

[0013] Furthermore, the evaluation of the degree of fit of each equation and finding the most relevant fitting curve equation according to the evaluation result of the degree of fit specifically involves calculating the determination coefficient of each equation and finding the most relevant fitting curve equation according to the determination coefficient.

[0014] Furthermore, the determination coefficient calculation formula is:

[0015]

[0016] Among them, R 2 is the coefficient of determination, F(X i ) is the fitting function value, Y i is the actual bending angle of the archwire, It is the average value of the actual bending angle of the archwire.

[0017] Furthermore, the determination coefficient ranges from 0 to 1.

[0018] Furthermore, in the data fitting step, the equation with the largest determination coefficient is selected as the most relevant fitting curve equation.

[0019] An electronic device, comprising: a processor;

[0020] A memory; and a program, wherein the program is stored in the memory and is configured to be executed by a processor, the program including a method for executing an initial error parameter correction method of an automatic archwire bending device.

[0021] A computer-readable storage medium stores a computer program, wherein the computer program is executed by a processor to provide a method for correcting initial error parameters of an automatic archwire bending device.

[0022] A computer program product includes a computer program / instruction, which, when executed by a processor, implements a method for correcting initial error parameters of an automatic archwire bending device.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention provides an initial error parameter correction method for an automatic archwire bending device, comprising the following steps: obtaining initial data, obtaining several groups of initial motor rotation angle data; measuring the actual angle, measuring the actual bending angle of the archwire after the automatic archwire bending device performs archwire bending according to the initial motor rotation angle data; data fitting, fitting different types of equations with the actual bending angle of the archwire and the corresponding initial motor rotation angle data, evaluating the fitting degree of each equation, and finding the most relevant fitting curve equation according to the fitting degree evaluation result as the final fitting function; parameter correction, correcting the initial motor rotation angle data through the final fitting function. The present invention inputs several groups of initial data, performs actual testing, and obtains a fitting function. When it is used formally later, the data value is input so that the final value is obtained through the fitting function to eliminate the rebound and various errors existing in the device itself. The problem that the orthodontic correction archwire has a variety of materials in the actual production process, and each material archwire has a different elastic modulus, and for the orthodontic archwire with nonlinear stress and strain, the archwire rebound angle is different after each bending, resulting in an inaccurate angle when the archwire is bent is solved.

[0025] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0027] Figure 1 The present invention is a flow chart of a method for correcting initial error parameters of an automatic archwire bending device. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0029] A method for correcting initial error parameters of an automatic archwire bending device, such as Figure 1 As shown, the following steps are included:

[0030] Acquire initial data, and acquire several groups of initial motor rotation angle data. In this embodiment, n groups of initial motor rotation angle data are input.

[0031] Measuring the actual angle, the automatic archwire bending device bends the archwire according to the set initial motor rotation angle data, and the bent archwire is measured under a high-power electronic magnifying glass to measure the actual bending angle of the archwire and obtain n results;

[0032] Data fitting, the actual bending angle of the arch wire and the corresponding initial motor rotation angle data are fitted to different types of equations, including linear equations, quadratic polynomial equations, cubic polynomial equations, quartic polynomial equations, etc. In this embodiment, the least squares method is used to fit different types of equations. The degree of fit of each equation is evaluated, and the most relevant fitting curve equation is found according to the fitting evaluation result as the final fitting function; preferably, the determination coefficient of each equation is calculated, and the range of the determination coefficient is 0 to 1. The degree of fit of the fitting function is evaluated by the determination coefficient. The determination coefficient is approximately close to 1, indicating that the fitting result is approximately close to the actual bending angle of the arch wire. The most relevant fitting curve equation is found according to the determination coefficient. Specifically, the equation with the largest determination coefficient is selected as the most relevant fitting curve equation. The determination coefficient calculation formula is:

[0033]

[0034] Among them, R 2 is the coefficient of determination, F(X i ) is the fitting function value, Y i is the actual bending angle of the archwire, It is the average value of the actual bending angle of the archwire.

[0035] Parameter correction: When it is officially used, the data value is input and the initial motor rotation angle data is corrected through the final fitting function to eliminate rebound and various errors in the device itself.

[0036] An electronic device, comprising: a processor;

[0037] A memory; and a program, wherein the program is stored in the memory and is configured to be executed by the processor, the program including a method for executing an initial error parameter correction method of an archwire automatic bending device.

[0038] A computer-readable storage medium stores a computer program, which is executed by a processor to provide a method for correcting initial error parameters of an automatic archwire bending device.

[0039] A computer program product includes a computer program / instruction, which, when executed by a processor, implements a method for correcting initial error parameters of an automatic archwire bending device.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A method for correcting initial error parameters of an automatic archwire bending device, characterized in that: The following steps are involved: Obtain initial data, obtain several sets of initial motor rotation angle data; Measuring the actual angle, measuring the actual bending angle of the archwire after the automatic archwire bending device bends the archwire according to the initial motor rotation angle data; Data fitting: Fit different types of equations to the actual bending angle of the archwire and the corresponding initial motor rotation angle data, evaluate the fitting degree of each equation, and find the most relevant fitting curve equation according to the fitting degree evaluation result as the final fitting function; specifically, calculate the determination coefficient of each equation, and find the most relevant fitting curve equation according to the determination coefficient; the determination coefficient calculation formula is: Among them, R 2 is the coefficient of determination, F(X i ) is the fitting function value, Y i is the actual bending angle of the archwire, is the average value of the actual bending angle of the archwire; the range of the determination coefficient is 0 to 1, and the equation with the largest determination coefficient is selected as the most relevant fitting curve equation; Parameter correction: correcting the initial motor rotation angle data through the final fitting function.

2. The method for correcting initial error parameters of an automatic archwire bending device according to claim 1, characterized in that: In the data fitting step, the equation types include straight line equations, quadratic polynomial equations, cubic polynomial equations, and quartic polynomial equations.

3. The method for correcting initial error parameters of an automatic archwire bending device according to claim 1, characterized in that: In the data fitting step, the least square method is used to fit different types of equations.

4. An electronic device, characterized in that include: processor; Memory; and a program, wherein the program is stored in the memory and configured to be executed by a processor, the program comprising instructions for executing the method according to any one of claims 1 to 3.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that: The computer program is executed by a processor to perform the method according to any one of claims 1 to 3.

6. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the method according to any one of claims 1 to 3 is implemented.

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