Method and device for measuring groove in motor stator silicon steel sheet and storage medium

Abstract

The invention discloses a method and device for measuring grooves in a motor stator silicon steel sheet and a storage medium, and belongs to the technical field of measurement, and the method only needs to carry out the edge imaging of any three adjacent grooves in the motor stator silicon steel sheet, extract edge sampling points, obtain three fitting circles corresponding to the three adjacent grooves, and fit a large circle. Calculating the included angle A1 of two adjacent grooves and the total number of the grooves; and finally, the circle center of the fitting circle corresponding to one groove is taken to be connected with the P1 to form a straight line, the straight line intersects with the fitting circle of the current groove, two intersection points are obtained, and therefore the highest points and the lowest points of all the grooves in the motor stator silicon steel sheet are obtained. According to the method, any three adjacent grooves in the motor stator silicon steel sheet only need to be measured through images, other parts are achieved through background software calculation, operation is easy, manual intervention is little, the requirement for operators is low, measurement efficiency and stability can be effectively improved, and convenience is brought to production operation.

Description

Technical Field

[0001] The invention relates to measurement technology, and in particular to a method, equipment and storage medium for measuring slots on a motor stator silicon steel sheet. Background Art

[0002] Silicon steel sheet is a high-performance alloy material. Its biggest feature is its strong corrosion resistance and heat resistance. Therefore, it is widely used in aerospace, ships, automobiles, boilers, refineries, nuclear power stations, power plants, etc. In addition, silicon steel sheet has the characteristics of high strength, high hardness, low specific surface area and good welding resistance, and is a high-tech alloy material.

[0003] Silicon steel sheets are important parts of motor stators. The slots on the silicon steel sheets have a significant impact on the performance of the motor, which requires the slots to have high dimensional accuracy and shape and position accuracy, and the highest and lowest points of each slot need to be measured. There are many slots and the inspection volume is large. How to quickly measure all the slots has always been a difficult problem in the industry.

[0004] At present, the main method for measuring the slots of silicon steel sheets 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 solution to solve the above problems. Summary of the invention

[0005] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a method for measuring the slots on the silicon steel sheets of a motor stator, which can preferably solve the problems of low efficiency, high requirements on measurement operators and poor stability of the existing measurement methods.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions: A method for measuring slots on a motor stator silicon steel sheet, wherein the motor stator silicon steel sheet is placed flat on a measuring platform, and the highest point and the lowest point of all slots on the motor stator silicon steel sheet are measured by the following steps: (1) Select any three adjacent slots on the motor stator silicon steel sheet, image the edge of each slot, intercept the image of the 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 the center P1. The centers of the fitting circles corresponding to two adjacent slots are connected with the center P1 of the large circle respectively, and 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) Take the outermost of the three adjacent grooves as the starting point, rotate the large circle by an angle of A1 with the center P1 of the large circle as the rotation center, and obtain the center of the fitting circle corresponding to the newly copied groove. 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 groove, repeat the above steps to obtain the fitting circles corresponding to N-3 grooves in total: (3) Take the centers of the fitting circles corresponding to the N slots, fit a large circle, and update the center P1 of the large circle; take the center of the fitting circle corresponding to a slot and connect it with P1 to form a straight line, which intersects with the fitting circle of the current slot, and 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 the N slots to obtain the highest and lowest points of all slots on the motor stator silicon steel sheet.

[0007] 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.

[0008] A computer-readable storage medium stores one or more programs, and when the one or more programs are executed by a processor, the method for measuring slots on a motor stator silicon steel sheet is implemented.

[0009] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that: by adopting the method of the present invention, it is only necessary to image the edges of any three adjacent slots on the motor stator silicon steel sheet and extract edge sampling points, obtain three fitting circles corresponding to the three adjacent slots through the edge sampling points, and fit a large circle to calculate the angle A1 between two adjacent slots and the total number of slots; this step requires image measurement of any three adjacent slots on the motor stator silicon steel sheet and calculate the angle A1 between two adjacent slots and the total number of slots; Then, take the outermost slot of the above three adjacent slots as the starting point, take the center of the large circle P1 as the rotation center, and rotate by an angle A1 to obtain the center of the fitting circle corresponding to the newly copied slot. At the same time, obtain the fitting circle with the center, and then start from the center of the fitting circle corresponding to the previously copied slot, repeat the above steps, and copy the fitting circles corresponding to N-3 slots in total: This step does not require image measurement of the motor stator silicon steel sheet, but is realized by software calculation in the background; Finally, take the center of the fitting circle corresponding to a slot and the center of the large circle to form a straight line, which intersects with the fitting circle of the current slot to obtain two intersection points. The point farther from the center of the large circle is the highest point of the current slot, and the other point is the lowest point of the current slot, thereby obtaining the highest and lowest points of all slots on the motor stator silicon steel sheet. This step does not require image measurement of the motor stator silicon steel sheet, and is also achieved through software calculation in the background, and finally the calculation results are output.

[0010] The present invention only needs to measure any three adjacent slots on the motor stator silicon steel sheet through images, and the others are all calculated by the background software. The operation is simple, and less manual intervention is required. There is no need to use the drawings of the motor stator silicon steel sheet to align the measurement with the workpiece, and the requirements for operators are relatively low. The measurement efficiency and stability of the motor stator silicon steel sheet can be effectively improved, bringing convenience to production operations.

[0011] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a flow chart of the present invention; Figure 2 This is a photo of a 36-slot silicon steel sheet that needs to be measured in a preferred embodiment of the present invention; Figure 3 It is the outline diagram of the 36-slot silicon steel sheet that needs to be measured in the preferred embodiment of the present invention; Figure 4 This is a (partial) image of the groove edge of a 36-groove silicon steel sheet that needs to be measured in a preferred embodiment of the present invention; Figure 5 It is a schematic diagram of fitting circles on three adjacent slots of a 36-slot silicon steel sheet that needs to be measured in a preferred embodiment of the present invention; Figure 6 It is a schematic diagram of a large circle fitted with the centers of the fitting circles on three adjacent grooves of a 36-groove silicon steel sheet to be measured in a preferred embodiment of the present invention, and the center of the large circle is recorded as P1; Figure 7 yes Figure 6 Schematic diagram of the angle A1 between adjacent slots; Figure 8 It is a schematic diagram of the fitting circle of all the slots of the 36-slot silicon steel sheet that needs to be measured in the preferred embodiment of the present invention; Fig. 9 It is a schematic diagram of the lowest point and the highest point in a preferred embodiment of the present invention; Fig.10 is a schematic diagram of the highest and lowest points of all the slots in a preferred embodiment of the present invention; Fig.11is a schematic structural diagram of an electronic device according to an embodiment of the present invention; Fig.12 FIG. 4 is a schematic diagram of the structure of a computer-readable storage medium according to an embodiment of the present invention. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0014] The example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as being limited to the examples set forth herein; on the contrary, providing these embodiments will make the disclosure of this application more comprehensive and complete, and will fully convey the concept of the example embodiments to those skilled in the art. In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. Many specific details will be provided in the following description, so as to fully understand the embodiments disclosed in the present application. However, it will be appreciated by those skilled in the art that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects disclosed in the present application. The block diagrams shown in the accompanying drawings are only functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices. The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0015] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, 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 "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or server that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0016] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or scheme described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or schemes. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0017] Embodiment 1 Embodiment 1 of the present invention discloses a method for measuring slots on a motor stator silicon steel sheet, such as Figure 1 As shown, the specific steps include: (1) Place the motor stator silicon steel sheet flat on the measuring platform. Figure 2 As shown, the motor stator silicon steel sheet is a 36-slot silicon steel sheet.

[0018] (2) Make the image of the motor stator silicon steel sheet clear.

[0019] (3) Image the edge of a slot on the motor stator silicon steel sheet, capture the image of the arc edge area, extract the edge points after image processing, and sample to obtain the sub-pixel coordinate values ​​of the edge sampling points, such as Figure 4 shown.

[0020] (4) The sub-pixel coordinate values ​​of the edge sampling points are converted from the image coordinate system to the mechanical coordinate system of the measurement platform, and the edge sampling points of the groove are fitted into a circle.

[0021] (5) Repeat steps (3) and (4) for the two adjacent slots in step (3), and take the edge sampling points of the slots to fit the circles corresponding to the two slots, such as Figure 5 shown.

[0022] (6) Take the center points of the three fitting circles corresponding to the three adjacent grooves mentioned above, fit a large circle, and set the center of the large circle as P1, as follows: Figure 6 shown.

[0023] (7) Connect the centers of the fitted circles of two adjacent grooves to P1 and calculate the angle A1 formed by the connecting lines, as follows: Figure 7 shown.

[0024] (8) Calculate the total number of slots in the motor stator silicon steel sheet N = 360 / A1, see Figure 3 .

[0025] (9) Taking the center of the fitting circle corresponding to the outermost groove of the above three adjacent grooves as the starting point, rotate the angle A1 with P1 as the rotation center to obtain the center of the fitting circle corresponding to the newly copied groove, and at the same time obtain the fitting circle with this center.

[0026] (11) Then, starting from the center of the fitting circle corresponding to the previously copied slot, repeat the above steps (8) and (9) to obtain a total of N-3 fitting circles corresponding to the slots, as shown in Figure 8 shown.

[0027] (12) Take the center points of all fitted circles, fit a large circle, and update the center point P1 of the large circle.

[0028] (13) Take a straight line connecting the center of a slot's fitting circle and P1, and intersect the straight line with the current slot's fitting circle 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, as shown in Fig. 9 shown.

[0029] (14) Repeat step (13) for the fitting circle with slots to obtain the highest and lowest points of all slots on the motor stator silicon steel sheet, as shown in Fig.10 shown.

[0030] 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 others are all calculated and realized by the background software. The operation is simple, less manual intervention is required, 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 the measurement efficiency and stability of the motor stator silicon steel sheet can be effectively improved, bringing convenience to production operations.

[0031] Embodiment 2 Embodiment 2 of the present invention provides an electronic device, such as Fig.11As 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 method step in the first embodiment. The computer readable program code 1131, when executed, causes the processor 1110 to execute any method step in the first embodiment.

[0032] Embodiment 3 Embodiment 3 of the present invention further provides a computer storage medium, such as Fig.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 run 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 one or more computer program products or written into one or more computer program products. These computer program products include computer storage media such as hard disks, compact disks (CDs), memory cards, or floppy disks.

[0033] 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 complete the method provided by the present application. The one or more modules may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program in the computer system.

[0034] 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 the 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 the center P1. The centers of the fitting circles corresponding to two adjacent slots are connected with the center P1 of the large circle respectively, and 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) Take the outermost of the three adjacent grooves as the starting point, rotate the large circle by an angle of A1 with the center P1 of the large circle as the rotation center, and obtain the center of the fitting circle corresponding to the newly copied groove. 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 groove, repeat the above steps to obtain the fitting circles corresponding to N-3 grooves in total: (3) Take the centers of the fitting circles corresponding to the N slots, fit a large circle, and update the center P1 of the large circle; take the center of the fitting circle corresponding to a slot and connect it with P1 to form a straight line, which intersects with the fitting circle of the current slot, and 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 the 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 as claimed in 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 a motor stator silicon steel sheet as described in claim 1.

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