Method, device and storage medium for measuring slots on a motor stator silicon steel sheet

Abstract

The application discloses a kind of motor stator silicon steel sheet on the measurement method of slot, equipment and storage medium, belong to measurement technical field, only need to motor stator silicon steel sheet on the edge imaging and extraction edge sampling point of any three adjacent slots, obtain the three fitting circles corresponding to three adjacent slots, and fit a big circle, calculate the included angle A1 of two adjacent slots and the total number of slots;With the center of big circle P1 as center, rotate angle A1, copy and obtain the fitting circle corresponding to N-3 slots: finally take the center of the fitting circle of a slot and P1 form straight line with the fitting circle of current slot intersection, obtain two intersection points, to obtain the highest point and the lowest point of all slots on motor stator silicon steel sheet, the application only needs to measure motor stator silicon steel sheet on any three adjacent slots by image, other all have background software calculation to realize, simple operation, less manual intervention, lower requirement to operating personnel, can effectively improve the measurement efficiency and stability, bring convenience for production operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of measurement, in particular to a method, device and storage medium for measuring slots on a motor stator silicon steel sheet. BACKGROUND

[0002] The silicon steel sheet is a high-performance alloy material, and its most important feature is that it has strong corrosion resistance and heat resistance, so it is widely used in aerospace, ships, automobiles, boilers, oil refineries, nuclear power stations, power plants and other fields. In addition, the silicon steel sheet has high strength, high hardness, low specific surface area and good welding resistance, and is a high-tech alloy material.

[0003] The silicon steel sheet is an important part of the motor stator, and the slots on the silicon steel sheet have an important influence on the performance of the motor, so the slots need to have high dimensional accuracy and geometric accuracy, and the highest point and the lowest point of each slot need to be measured. The number of slots is relatively large, and the detection amount is large, so how to quickly measure all the slots has always been a difficulty in the industry.

[0004] At present, the main method for measuring the slots of the silicon steel sheet is to use a projector or an image measuring instrument to measure each slot one by one or to import a silicon steel sheet drawing to align the workpiece for measurement. These measurement methods have low measurement efficiency, high requirements for measurement operators, and poor stability. Therefore, it is necessary to study a scheme to solve the above problems. SUMMARY

[0005] Therefore, the present application aims to solve the problems of low efficiency, high requirements for measurement operators and poor stability of the existing measurement methods.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] A method for measuring slots on a motor stator silicon steel sheet, the motor stator silicon steel sheet is placed flat on a measurement platform, and the following steps are used to measure the highest point and the lowest point of all slots on the motor stator silicon steel sheet:

[0008] (1) Select any three adjacent slots on the motor stator silicon steel sheet, image the edge of each slot, and extract the edge sampling points of the circular arc edge region. After converting the edge sampling points to the mechanical coordinate system of the measurement platform, the three adjacent slots are fitted into three fitting circles;

[0009] The centers of the three fitting circles are used to fit a large circle with a center P1, the centers of the fitting circles corresponding to two adjacent slots are connected with the center P1 of the large circle, the angle A1 of the included angle formed by the connecting lines is calculated, and the total number N of the slots on the motor stator silicon steel sheet is obtained = 360 / A1;

[0010] (2) Taking the outermost one of the three adjacent slots as the starting point, rotating the center P1 of the large circle as the rotation center by the angle A1, the center of the fitting circle corresponding to the newly copied slot is obtained, and then the fitting circle is obtained from the center of the fitting circle corresponding to the previously copied slot, and the above steps are repeated, and N-3 fitting circles corresponding to the slots are obtained:

[0011] (3) The centers of the N fitting circles are taken to fit a large circle, and the center P1 of the large circle is updated; a straight line is formed by connecting the center of the fitting circle corresponding to one slot with P1, the straight line intersects the fitting circle of the current slot, and two intersection points are obtained, wherein the point far from P1 is the highest point of the current slot, and the other point is the lowest point of the current slot, and thus N slots are traversed to obtain the highest points and the lowest points of all the slots on the motor stator silicon steel sheet.

[0012] An electronic device, wherein the electronic device comprises: a processor; and a memory arranged to store computer executable instructions which, when executed, cause the processor to perform the method for measuring the slots on the motor stator silicon steel sheet.

[0013] A computer readable storage medium, wherein the computer readable storage medium stores one or more programs which, when executed by a processor, implement the method for measuring the slots on the motor stator silicon steel sheet.

[0014] Compared with the prior art, the present application has obvious advantages and beneficial effects, specifically, as known from the above technical solution: by using the method of the present application, only the edges of any three adjacent slots on the motor stator silicon steel sheet need to be imaged and the edge sampling points need to be extracted, three fitting circles corresponding to the three adjacent slots are obtained through the edge sampling points, a large circle is fitted, and the included angle A1 of the two adjacent slots and the total number of the slots are calculated; this step requires image measurement of any three adjacent slots on the motor stator silicon steel sheet and calculation of the included angle A1 of the two adjacent slots and the total number of the slots;

[0015] Then the outermost one of the three adjacent grooves above is taken as a starting point, and a center of a fitting circle corresponding to a newly copied groove is obtained by rotating the center P1 of the big circle by an angle A1, and a fitting circle is obtained from the center; then the above steps are repeated from the center of the fitting circle corresponding to the groove copied before, and N-3 fitting circles corresponding to grooves are obtained: this step does not need to measure the image of the motor stator silicon steel sheet, but is realized by software calculation in the background;

[0016] Finally, a straight line is drawn from the center of the fitting circle corresponding to the groove to the center of the big circle, the straight line intersects with the fitting circle of the current groove, two intersection points are obtained, wherein the point far from the center of the big circle is the highest point of the current groove, and the other point is the lowest point of the current groove, so that the highest points and the lowest points of all the grooves on the motor stator silicon steel sheet are obtained, this step also does not need to measure the image of the motor stator silicon steel sheet, but is realized by software calculation in the background, and finally the calculation result is output.

[0017] The present application only needs to measure any three adjacent grooves on the motor stator silicon steel sheet by image measurement, and the others are realized by software calculation in the background, so that the operation is simple, the manual intervention is less, the motor stator silicon steel sheet does not need to be aligned and measured by using the drawing and the workpiece, the requirement for the operator is lower, the measurement efficiency and stability of the motor stator silicon steel sheet can be effectively improved, and convenience is brought to production operation.

[0018] In order to more clearly illustrate the structural features and effects of the present application, the present application will be described in detail below with reference to the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a flowchart of the present application;

[0020] Figure 2 is a real photo of a 36-groove silicon steel sheet which needs to be measured in the preferred embodiment of the present application;

[0021] Figure 3 is a profile diagram of a 36-groove silicon steel sheet which needs to be measured in the preferred embodiment of the present application;

[0022] Figure 4 is a groove edge imaging (partial) diagram of a 36-groove silicon steel sheet which needs to be measured in the preferred embodiment of the present application;

[0023] Figure 5 is a schematic diagram of fitting circles on three adjacent grooves of a 36-groove silicon steel sheet which needs to be measured in the preferred embodiment of the present application;

[0024] Figure 6 is a schematic diagram of fitting a center of the fitting circles of the three adjacent grooves of the 36-groove silicon steel sheet into a big circle in the preferred embodiment of the present application, and the center of the big circle is marked as P1;

[0025] Figure 7 is Figure 6 A1 is a schematic diagram of the included angle of adjacent slots in the 36-slot silicon steel sheet to be measured in the preferred embodiment of the present application;

[0026] Figure 8 is a schematic diagram of the fitting circle of all slots of the 36-slot silicon steel sheet to be measured in the preferred embodiment of the present application;

[0027] Figure 9 is a schematic diagram of the lowest point and the highest point in the preferred embodiment of the present application;

[0028] Figure 10 is a schematic diagram of the highest point and the lowest point of all slots in the preferred embodiment of the present application;

[0029] Figure 11 is a schematic diagram of the structure of an electronic device according to an embodiment of the present application;

[0030] Figure 12 is a schematic diagram of the structure of a computer readable storage medium according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present application.

[0032] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and fully convey the inventive aspects of example implementations to those skilled in the art. Like reference numerals may refer to like elements throughout the description of the figures.

[0033] Furthermore, described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are recited to provide a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the implementations can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, devices, implementations, or operations are not shown or described in detail in order to avoid obscuring aspects of the disclosure.

[0034] The block diagrams shown in the drawings are merely functional entities, and do not necessarily have to correspond to physically independent entities. That is, the functional entities can be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0035] The flowcharts shown in the drawings are merely illustrative, and do not necessarily include all contents and operations / steps, nor are they necessarily executed in the order described. For example, some operations / steps can be further divided, and some operations / steps can be combined or partially combined, so the actual execution order can be changed according to actual conditions.

[0036] The terms "first", "second", and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or server including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product, or device.

[0037] In the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration, and any embodiment or aspect described herein as "exemplary" or "for example" is not necessarily to be construed as preferred or advantageous over other embodiments or aspects. Rather, use of the words "exemplary" or "for example" is intended to present concepts in a concrete manner.

[0038] Embodiment One

[0039] Embodiment One of the present application discloses a method for measuring slots on a motor stator silicon steel sheet, as shown in Figure 1 The method specifically comprises the following steps:

[0040] (1) Place the motor stator silicon steel sheet flat on the measuring platform, as shown in Figure 2 The motor stator silicon steel sheet is a 36-slot silicon steel sheet.

[0041] (2) Make the image of the motor stator silicon steel sheet clear.

[0042] (3) Image the edge of one slot on the motor stator silicon steel sheet, intercept the image of the circular arc edge region, extract the edge points after image processing, and sample to obtain the sub-pixel coordinate values of the edge sampling points, as shown inFigure 4 as shown.

[0043] (4) Convert the sub-pixel coordinate values of the edge sampling points from the image coordinate system to the mechanical coordinate system of the measuring platform, and fit the edges of the slots into a circle.

[0044] (5) Repeat steps (3) and (4) for the two slots adjacent to the slot in step (3), and fit the edges of the slots into a circle corresponding to the two slots, as shown in Figure 5 .

[0045] (6) Fit a large circle with the three center points of the three fitted circles corresponding to the three adjacent slots, and set the center of the large circle as P1, as shown in Figure 6 .

[0046] (7) Draw lines from the centers of the fitted circles of the two adjacent slots to P1, and calculate the angle A1 of the included angle formed by the lines, as shown in Figure 7 .

[0047] (8) Calculate the total number of slots N of the motor stator silicon steel sheet as N = 360 / A1, as shown in Figure 3 .

[0048] (9) Take the center of the fitted circle corresponding to the outermost slot of the three adjacent slots as the starting point, and rotate the center by an angle A1 with P1 as the center of rotation to obtain the center of the fitted circle corresponding to the newly copied slot, and obtain the fitted circle with the center.

[0049] (11) Then, starting from the center of the fitted circle corresponding to the previously copied slot, repeat steps (8) and (9) above, and obtain N-3 fitted circles corresponding to the slots, as shown in Figure 8 .

[0050] (12) Fit a large circle with all the center points of the fitted circles, and update the center P1 of the large circle.

[0051] (13) Draw a straight line from the center of the fitted circle of a slot to P1, and the straight line intersects the fitted circle of the current slot, and the farther point from P1 is the highest point of the current slot, and the other point is the lowest point of the current slot, as shown in Figure 9 .

[0052] (14) Repeat step (13) for the fitted circle with slots, and obtain the highest point and the lowest point of all the slots on the motor stator silicon steel sheet, as shown in Figure 10 .

[0053] The design focus of the present invention is that only any three adjacent slots on the motor stator silicon steel sheet need to be measured, and the rest are calculated and implemented by background software. Its operation is simple, requiring little human intervention, and there is no need to use the drawings of the motor stator silicon steel sheet to align the measurement with the workpiece. The requirements for operators are relatively low, and it can effectively improve the measurement efficiency and stability of the motor stator silicon steel sheet, bringing convenience to production operations.

[0054] Example 2

[0055] A second embodiment of the present invention provides an electronic device, such as Figure 11 As shown, the electronic device 1100 includes a processor 1110 and a memory 1120 arranged to store computer-executable instructions (computer-readable program code). The memory 1120 can be an electronic memory such as a flash memory, an EEPROM (Electrically Erasable Programmable Read-Only Memory), an EPROM, a hard disk, or a ROM. The memory 1120 has a storage space 1130 for storing a computer-readable program code 1131 for executing any of the method steps in the first embodiment. When executed, the computer-readable program code 1131 causes the processor 1110 to execute any of the method steps in the first embodiment.

[0056] Example 3

[0057] The third embodiment of the present invention further provides a computer storage medium, such as Figure 12 As shown, the computer-readable storage medium 1200 stores a computer-readable program code 1131 for executing the method steps of the first embodiment, which can be read by the processor 1110 of the electronic device 1100. When the computer-readable program code 1131 is executed by the electronic device 1100, the electronic device 1100 is caused to execute any method steps of the first embodiment. The computer-readable program code 1131 can be compressed in an appropriate form. The computer-readable program code 1131 can be read from or written into one or more computer program products. These computer program products include computer storage media such as a hard disk, a compact disk (CD), a memory card, or a floppy disk.

[0058] In some embodiments of the present application, the computer program may be divided into one or more modules, which are stored in the memory and executed by the processor to perform the method provided by the present application. The one or more modules may be a series of computer program instruction segments capable of performing specific functions, and the instruction segments are used to describe the execution process of the computer program on the computer system.

[0059] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for measuring slots on a motor stator silicon steel sheet, characterized in that: Place the motor stator silicon steel sheet flat on the measuring platform and use the following steps to measure the highest and lowest points of all slots on the motor stator silicon steel sheet: (1) Select any three adjacent slots on the motor stator silicon steel sheet, image the edge of each slot, intercept the image of its arc edge area and extract the edge sampling points, convert the edge sampling points to the mechanical coordinate system of the measurement platform and fit them into circles to obtain three fitting circles corresponding to the three adjacent slots; The centers of the three fitting circles are used to fit a large circle with a center P1. The centers of the fitting circles corresponding to two adjacent slots are connected to the center P1 of the large circle. The angle A1 formed by the connecting lines is calculated to obtain the total number of slots on the motor stator silicon steel sheet N = 360 / A1; (2) Starting from the outermost of the three adjacent slots, rotate the circle by an angle of A1 with the center of the large circle P1 as the rotation center to obtain the center of the fitting circle corresponding to the newly copied slot. At the same time, obtain the fitting circle with this center. Then, starting from the center of the fitting circle corresponding to the previously copied slot, repeat the above steps to obtain the fitting circles corresponding to N-3 slots in total. (3) Take the centers of the fitting circles corresponding to N slots, fit a large circle, and update the center of the large circle P1; take the center of the fitting circle corresponding to a slot and connect it with P1 to form a straight line, and intersect the straight line with the fitting circle of the current slot to obtain two intersection points. The point farther from P1 is the highest point of the current slot, and the other point is the lowest point of the current slot. In this way, traverse N slots to obtain the highest and lowest points of all slots on the motor stator silicon steel sheet.

2. An electronic device, wherein: The electronic device comprises: a processor; and a memory arranged to store computer-executable instructions, wherein when the executable instructions are executed, the processor executes the method for measuring slots on a motor stator silicon steel sheet according to claim 1.

3. A computer-readable storage medium, wherein: The computer-readable storage medium stores one or more programs, and when the one or more programs are executed by the processor, they are characterized in that they implement the method for measuring slots on motor stator silicon steel sheets according to claim 1.

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