A kind of ring magnetic scale synchronous charging and measuring device and synchronous charging and measuring method

Abstract

The invention discloses a synchronous charging and measuring device and a synchronous charging and measuring method for an annular magnetic scale. The synchronous charging and measuring device comprises a rotating base for fixing an annular magnetic scale to be magnetized, a magnetizing pole head and a measuring probe located above the annular magnetic scale to be magnetized and distributed along the circumference thereof; a circle of the annular magnetic scale to be magnetized needs to be charged with a total of m magnetic poles that alternate between N and S poles, where m is a positive integer multiple of 2; the center angle degree α corresponding to a single N pole or S pole of the annular magnetic scale to be magnetized is 360° / m, the magnetizing pole head comprises a first pole edge and a second pole edge, and the measuring probe is close to the second pole edge; the center angle degree β formed between the first pole edge and the second pole edge is less than 360° / m, and the center angle degree γ formed between the measuring probe and the second pole edge is between (360° / m)‑β and 180° / m. The invention can synchronously magnetize and detect the annular magnetic scale, has high working efficiency, low equipment cost and small footprint.

Description

Technical Field

[0001] The invention relates to the technical field of magnetization, in particular to a synchronous magnetization and measurement device and a synchronous magnetization and measurement method for an annular magnetic scale. Background Art

[0002] The annular magnetic scale is an important component of the annular magnetic encoder. The magnetization accuracy of the annular magnetic scale (including the pole width and magnetic field strength of each pole) is directly related to the accuracy of the annular magnetic encoder. At present, the magnetization of the annular magnetic scale can refer to the patent CN211208135U-a fully automatic magnetic ring magnetization device. The annular magnetic scale to be magnetized is charged with multiple magnetic poles that alternate between N and S poles in a circumferential direction. After the magnetization of the annular magnetic scale is completed, it is also necessary to detect it. The detection content includes the pole width of each pole of the annular magnetic scale after magnetization and the magnetic field strength of each pole. Therefore, it is necessary to use an additional detection device similar to the patent CN215005828U-magnetic field center detector. It can be seen that the current asynchronous magnetization and detection scheme requires both a magnetization device and a detection device. The equipment cost is high and the space occupied is also large. In addition, the asynchronous magnetization and detection takes more time, the work efficiency is low, and the annular magnetic scales before and after the detection are easily mixed. Therefore, it is urgent to develop a device and a method for synchronously charging and measuring an annular magnetic scale to solve the current problem of low efficiency in magnetizing and measuring annular magnetic scales. Summary of the invention

[0003] The object of the present invention is to provide a synchronous charging and testing device and method for an annular magnetic scale. The present invention can synchronously magnetize and test an annular magnetic scale, has high working efficiency, low equipment cost and small footprint.

[0004] The technical solution of the present invention is as follows: a synchronous charging and measuring device for an annular magnetic scale, comprising a rotating base for fixing the annular magnetic scale to be magnetized, a magnetizing pole head located above the annular magnetic scale to be magnetized and distributed along the circumference thereof, and a measuring probe; a circle of the annular magnetic scale to be magnetized needs to be charged with a total of m magnetic poles that alternate between N and S poles, where m is a positive integer multiple of 2; the central angle α corresponding to a single N pole or S pole of the annular magnetic scale to be magnetized is 360° / m, the magnetizing pole head is sequentially provided with a first pole edge and a second pole edge that constitute the pole width of the magnetizing pole head in the rotation direction of the rotating base, and the measuring probe is used for measuring the magnetic scale; The probe is close to the second pole edge, and the measuring probe is regarded as a straight line. The extension lines of the first pole edge, the second pole edge and the straight line where the measuring probe is located all pass through the central axis of the annular magnetic scale to be magnetized; the degree of the center angle β formed between the first pole edge and the second pole edge is less than 360° / m; the degree of the center angle γ formed between the measuring probe and the second pole edge is between (360° / m)-β and 180° / m; or when the measuring probe rotates through a positive integer multiple of an angle of 360° / m, the degree of the center angle formed between it and the second pole edge is between (360° / m)-β and 180° / m.

[0005] Compared with the prior art, the beneficial effects of the synchronous charging and measuring equipment of the present invention are embodied in the following aspects: the present invention fixes the annular magnetic scale to be magnetized on a rotating base, and arranges a magnetizing pole head and a measuring probe above the position where the product is fixed on the rotating base at a certain angle difference along the circumference of the product. During the entire magnetization and measurement process, the annular magnetic scale rotates together with the rotating base, while the magnetizing pole head and the measuring probe are fixed. During the rotation of the annular magnetic scale, the magnetizing pole head and the measuring probe work intermittently at a certain timing by controlling the respective working times of the magnetizing pole head and the measuring probe. The magnetizing pole head and the measuring probe do not affect each other's work. Finally, during the rotation of the annular magnetic scale, magnetization and detection are completed simultaneously, which not only improves work efficiency, but also reduces the cost of the equipment and the footprint of the equipment.

[0006] In the aforementioned annular magnetic scale synchronous charging and measuring device, the degree of the center angle β formed between the first pole edge and the second pole edge is between 240° / m and 360° / m.

[0007] The aforementioned annular magnetic scale synchronous charging and measuring equipment includes a main controller, which is connected to a magnetizing timing controller and a magnetizing polarity controller in sequence. The main controller is connected to a magnetizing pole head via the magnetizing timing controller and the magnetizing polarity controller, and is used to control the magnetizing time and magnetizing polarity of the magnetizing pole head; the main controller is also connected to a measurement timing controller, and the main controller is connected to a measuring probe via the measurement timing controller, and is used to control the measuring time of the measuring probe. The measuring probe is connected to a measurement data collector, and the measurement data collector is used to collect magnetic field strength data measured by the measuring probe in real time. The measurement data collector is connected to a host computer, and the host computer is used to process the real-time data sent back by the measurement data collector, and calculate whether the pole width and magnetic field strength of each pole of the annular magnetic scale after magnetization meet the standards based on these data.

[0008] The aforementioned synchronous charging and measuring method of the annular magnetic scale synchronous charging and measuring device comprises the following steps:

[0009] Step 1: Keep the rotating base stationary and fix the annular magnetic scale to be magnetized on the rotating base;

[0010] Step 2: Control the rotating base to rotate at a constant speed. When the rotating base is started, control the magnetizing pole head to discharge forward. The forward discharge time of the magnetizing pole head is less than the time taken by the rotating base to rotate through an angle α-β. When the magnetizing pole head is powered off, the magnetization of a single N pole or S pole is completed.

[0011] Step 3, starting the discharge timing from the magnetized pole head in step 2, when the rotating base rotates through the angle α-β, controlling the measuring probe to work, the working time of the measuring probe is equal to the time taken for the rotating base to rotate through the angle β, when the rotating base rotates through the angle β, controlling the measuring probe to cut off the power, and recording the corresponding relationship between the magnetic field strength and time measured by the measuring probe;

[0012] Step 4: When the measuring probe in step 3 is powered off, the magnetizing pole head is controlled to discharge in the reverse direction. The time for the magnetizing pole head to discharge in the reverse direction is less than the time for the rotating base to rotate through the angle α-β. When the magnetizing pole head is powered off, a single magnetic pole with opposite magnetic properties to that in step 2 is obtained.

[0013] Step 5, starting the discharge timing from the magnetizing pole head in step 4, when the rotating base rotates through the angle α-β, controlling the measuring probe to work, the working time of the measuring probe is equal to the time taken for the rotating base to rotate through the angle β, when the rotating base rotates through the angle β, controlling the measuring probe to cut off the power, and recording the corresponding relationship between the magnetic field strength and time measured by the measuring probe;

[0014] Step 6: Repeat steps 2 to 5 until all m magnetic poles are magnetized and measured;

[0015] Step 7: Determine whether the pole width and magnetic field strength of each pole of the annular magnetic scale after magnetization meet the standards based on the total data measured by the measuring probe, and determine the annular magnetic scale that meets the standards as a qualified product, and the annular magnetic scale that does not meet the standards as a defective product.

[0016] In the aforementioned synchronous charging and testing method, steps one to seven are cyclically performed to realize continuous charging and testing of the annular magnetic scale. When defective products are produced in step seven, the operation of the synchronous charging and testing equipment is stopped, and it is tested and calibrated before being put into operation, which can effectively avoid the continuous production of defective products.

[0017] In the aforementioned synchronous charging and measuring method, in step seven, the pole width of each pole of the annular magnetic scale is calculated based on the time interval between two adjacent zero magnetic field intensities measured by the measuring probe and the uniform rotation speed of the rotating base. If the pole width of each pole falls within the set range of the pole width of the annular magnetic scale, it indicates that the pole width of each pole of the annular magnetic scale meets the standard. If the pole width of one pole does not meet the standard, the entire product is unqualified.

[0018] In the aforementioned synchronous charging and testing method, in step seven, the maximum magnetic field strength value is compared with the set threshold value of the magnetic field strength of the annular magnetic scale according to the maximum magnetic field strength value measured by the measuring probe each time. If the maximum magnetic field strength value measured each time is greater than the set threshold value, it indicates that the magnetic field strength of each pole of the annular magnetic scale meets the standard. If the magnetic field strength of one pole does not meet the standard, the entire product is unqualified.

[0019] Compared with the prior art, the beneficial effects of the synchronous charging and measuring method of the present invention are embodied in that: the present invention controls the working timing of the magnetizing pole head and the measuring probe, so that the measuring probe does not work during magnetization, and the magnetizing pole head does not work during detection, and the center angle β formed between the first pole edge and the second pole edge is between 240° / m and 360° / m, that is, the pole width of the magnetizing pole head is larger than two-thirds of the single-pole pole width of the annular magnetic scale, and the power-on time of the magnetizing pole head is set to be less than the time taken for the rotating base to rotate through the angle α-β, which not only makes the magnetization time much shorter than the measurement time, but also there will be a time gap between each magnetization and the measurement, and the existence of this time gap ensures that the magnetizing pole head will not affect the operation of the measuring probe. By setting the angle between the magnetizing pole head and the measuring probe, especially the angle between the measuring probe and the second pole edge of the magnetizing pole head, under the special angle setting, the measuring probe can detect the boundary line (the position where the magnetic field intensity is zero) of the single pole of the annular magnetic scale that has just been magnetized during the period from the completion of the magnetization of the single pole of the annular magnetic scale to the rotation to the next magnetization starting position, and can also detect the maximum magnetic field intensity of the single pole of the magnetic scale that has just been magnetized. During this process, the rotating base always rotates at a uniform speed without stopping. Finally, during the rotation of the rotating base, the entire annular magnetic scale is magnetized, and the pole width and maximum magnetic field intensity of each pole are also detected. It can be determined whether the magnetized annular magnetic scale is qualified, killing two birds with one stone and high work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the synchronous charging and testing device of the present invention;

[0021] Figure 2 It is a circuit module connection principle diagram of the synchronous charging and testing device of the present invention;

[0022] Figure 3 This is a schematic diagram of the process of synchronously charging and measuring a six-pole annular magnetic scale using the synchronous charging and measuring method of the present invention in an embodiment;

[0023] Figure 4 It is a schematic diagram of the relationship between the magnetic field strength measured by the measuring probe and the rotation angle of the annular magnetic scale.

[0024] Figure numerals: 1-annular magnetic scale, 2-rotating base, 3-magnetizing pole head, 4-measuring probe, 31-first pole edge, 32-second pole edge, 100-general controller, 200-magnetizing timing controller, 300-magnetizing polarity controller, 400-measurement timing controller, 500-measurement data collector, 600-host computer. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0026] Embodiment: A ring-shaped magnetic scale synchronous charging and measuring device, the structure of which is as follows Figure 1 As shown, it includes a rotating base 2 for fixing the annular magnetic scale 1 to be magnetized, a magnetizing pole head 3 located above the annular magnetic scale 1 to be magnetized and distributed along the circumference thereof, and a measuring probe 4; a total of m magnetic poles that are cyclically alternately charged with N and S poles are required for one circle of the annular magnetic scale 1 to be magnetized, and m is a positive integer multiple of 2; the degree of the central angle α corresponding to a single N pole or S pole of the annular magnetic scale 1 to be magnetized is 360° / m, and the magnetizing pole head 3 is sequentially distributed with first poles constituting the pole width of the magnetizing pole head 3 in the rotation direction of the rotating base 2 The pole edge 31 and the second pole edge 32, the measuring probe 4 is close to the second pole edge 32, and the measuring probe 4 is regarded as a straight line, then the extension line of the straight line where the first pole edge 31, the second pole edge 32 and the measuring probe 4 are located all pass through the central axis of the annular magnetic scale 1 to be magnetized; the center angle degree β formed between the first pole edge 31 and the second pole edge 32 is between 240° / m and 360° / m; the center angle degree γ formed between the measuring probe 4 and the second pole edge 32 is between (360° / m)-β and 180° / m.

[0027] Of course, in practical applications, it can also be set that when the measuring probe 4 rotates through a positive integer multiple of 360° / m, the center angle formed between it and the second polar edge 32 is between (360° / m)-β and 180° / m. The difference is:

[0028] When the degree of the central angle γ formed between the measuring probe 4 and the second pole edge 32 is between (360° / m)-β and 180° / m, that is, the distance between the measuring probe 4 and the second pole edge 32 is relatively close, the measurement work can be carried out immediately after the first pole of the annular magnetic scale 1 is magnetized, and after the annular magnetic scale 1 rotates 360°+β, the magnetization and detection can be completed at the same time; the reason why it is necessary to rotate one circle plus the angle β to complete the magnetization and detection at the same time is because at least two magnetic poles need to be charged to detect the first position where the magnetic field intensity is zero, that is, after the first magnetic pole is magnetized, its left boundary cannot be detected, and only its right boundary can be detected.

[0029] When the measuring probe 4 rotates through a positive integer multiple of 360° / m, the degree of the center angle formed between it and the second pole edge 32 is between (360° / m)-β and 180° / m, that is, the distance between the measuring probe 4 and the second pole edge 32 is far, and the measurement work cannot be carried out immediately after the first pole of the annular magnetic scale 1 is magnetized. Instead, the magnetization position of the first pole can be detected only after the annular magnetic scale 1 completes the magnetization of the positive integer poles. Therefore, the annular magnetic scale 1 needs to rotate more than 360°+β to complete magnetization and detection at the same time. The efficiency is slightly lower than the solution when the degree of the center angle γ formed between the measuring probe 4 and the second pole edge 32 is between (360° / m)-β and 180° / m, but the measuring probe 4 can obtain a sufficiently large installation space.

[0030] The synchronous charging and measuring equipment also includes a main controller 100, which is connected to a magnetizing timing controller 200 and a magnetizing polarity controller 300 in sequence. The main controller 100 is connected to a magnetizing pole head 3 via the magnetizing timing controller 200 and the magnetizing polarity controller 300, and is used to control the magnetizing time and magnetizing polarity of the magnetizing pole head 3; the main controller 100 is also connected to a measurement timing controller 400, and the main controller 100 is connected to a measuring probe 4 via the measurement timing controller 400, and is used to control the measuring time of the measuring probe 4. The measuring probe 4 is connected to a measurement data collector 500, and the measurement data collector 500 is used to collect the magnetic field strength data measured by the measuring probe 4 in real time. The measurement data collector 500 is connected to a host computer 600, which can be referred to Figure 2 .

[0031] In order to facilitate the description of the synchronous charging and measuring method of the present invention, in this embodiment, a circle of the annular magnetic scale 1 to be magnetized needs to be charged with a total of 6 magnetic poles (3 N poles and 3 S poles) that alternate between N and S poles, that is, the center angle degree α corresponding to a single N pole or S pole is 60°; the pole width center angle degree of the magnetizing pole head 3 is selected to be 50°, that is, the center angle degree β formed between the first pole edge 31 and the second pole edge 32 is 50°, and the center angle degree γ formed between the measuring probe 4 and the second pole edge 32 is set to 30°, which can be referred to Figure 1 .

[0032] The synchronous charging and testing method of the present invention comprises the following steps. The process principle can be referred to Figure 3 :

[0033] Step 1: Keep the rotating base 2 still, and fix the annular magnetic scale 1 to be magnetized on the rotating base 2. Figure 3 In state 1, the central angle formed between the measuring probe 4 and the second pole edge 32 is γ=30°.

[0034] The main controller 100 coordinates and controls the magnetization timing controller 200 and the measurement timing controller 400, and further controls the working timing of the magnetization pole head 3 and the measurement probe 4.

[0035] Step 2: Control the rotating base 2 to rotate at a constant speed. When the rotating base 2 is started, control the magnetizing pole head 3 to discharge forward. The time for the magnetizing pole head 3 to discharge forward is less than the time it takes for the rotating base 2 to rotate by 10°. When the magnetizing pole head 3 is powered off, the magnetization of a single N pole (N1) is completed, and the rotating base 2 continues to rotate at a constant speed until the total angle is 10°. Figure 3 State 2 in .

[0036] Step 3, starting the discharge timing of the magnetizing pole head 3 from step 2, when the rotating base 2 rotates through a total angle of 10°, the measuring probe 4 is controlled to work, and the working time of the measuring probe 4 is equal to the time taken by the rotating base 2 to rotate through an angle of 50°, that is, when the rotating base 2 rotates through a total angle of 60°, the measuring probe 4 is controlled to be powered off, and the corresponding relationship between the magnetic field strength and time measured by the measuring probe 4 is recorded. After step 3 is completed, Figure 3 As shown in State 3 in FIG. 1 , at this time, the measuring probe 4 has measured the maximum magnetic field intensity of the magnetic pole N1 (but has not measured the left boundary of the magnetic pole N1).

[0037] Step 4: When the measuring probe 4 in step 3 is powered off, the magnetizing pole head 3 is controlled to discharge in the reverse direction. The time for the magnetizing pole head 3 to discharge in the reverse direction is less than the time for the rotating base 2 to rotate by an angle of 10°. When the magnetizing pole head 3 is powered off, a single S pole (S1) with a magnetic property opposite to that in step 2 is obtained. The rotating base 2 continues to rotate at a constant speed until the total angle is 70°. Figure 3 State 4 in .

[0038] Step 5: When the rotating base 2 rotates through a total angle of 70°, the measuring probe 4 is controlled to work. The working time of the measuring probe 4 is equal to the time taken by the rotating base 2 to rotate through an angle of 50°. That is, when the rotating base 2 rotates through a total angle of 120°, the measuring probe 4 is controlled to be powered off, and the corresponding relationship between the magnetic field strength and time measured by the measuring probe 4 is recorded. After step 5 is completed, Figure 3 As shown in state 5 in FIG, at this time, the measuring probe 4 has measured the right boundary of the magnetic pole N1 (ie, the left boundary of the magnetic pole S1) and the maximum magnetic field intensity of the magnetic pole S1.

[0039] Step 6: Repeat steps 2 to 5 until all 6 magnetic poles are magnetized and measured;

[0040] The details are as follows (the rotating base 2 is kept rotating at a constant speed, and the rotation angles are gradually accumulated):

[0041] The magnetizing pole head 3 is controlled to discharge forward. The time of forward discharge of the magnetizing pole head 3 is less than the time taken by the rotating base 2 to rotate by 10°. When the magnetizing pole head 3 is powered off, the magnetizing of the magnetic pole N2 is completed, and the rotating base 2 continues to rotate at a constant speed until the total angle is 130°. Figure 3 Status 6 in;

[0042] When the rotating base 2 rotates through a total angle of 130°, the measuring probe 4 is controlled to work. The working time of the measuring probe 4 is equal to the time taken by the rotating base 2 to rotate through an angle of 50°. That is, when the rotating base 2 rotates through a total angle of 180°, the measuring probe 4 is controlled to be powered off, and the corresponding relationship between the magnetic field strength and time measured by the measuring probe 4 is recorded. After this step is completed, Figure 3 As shown in state 7, at this time, the measuring probe 4 has measured the left boundary of the magnetic pole N2 (that is, the right boundary of the magnetic pole S1) and the maximum magnetic field intensity of the magnetic pole N2;

[0043] The magnetizing pole head 3 is controlled to discharge in the reverse direction. The time for the magnetizing pole head 3 to discharge in the reverse direction is less than the time for the rotating base 2 to rotate by 10°. When the magnetizing pole head 3 is powered off, the magnetizing of the magnetic pole S2 is completed, and the rotating base 2 continues to rotate at a constant speed until the total angle is 190°. Figure 3 Status 8 in;

[0044] When the rotating base 2 rotates through a total angle of 190°, the measuring probe 4 is controlled to work. The working time of the measuring probe 4 is equal to the time taken by the rotating base 2 to rotate through an angle of 50°. That is, when the rotating base 2 rotates through a total angle of 240°, the measuring probe 4 is controlled to be powered off, and the corresponding relationship between the magnetic field strength and time measured by the measuring probe 4 is recorded. After this step is completed, Figure 3 As shown in state 9, at this time, the measuring probe 4 has measured the right boundary of the magnetic pole N2 (that is, the left boundary of the magnetic pole S2) and the maximum magnetic field intensity of the magnetic pole S2;

[0045] The magnetizing pole head 3 is controlled to discharge forward. The time of forward discharge of the magnetizing pole head 3 is less than the time taken by the rotating base 2 to rotate by 10°. When the magnetizing pole head 3 is powered off, the magnetizing of the magnetic pole N3 is completed, and the rotating base 2 continues to rotate at a constant speed until the total angle is 250°. Figure 3 Status 10 in;

[0046] When the rotating base 2 rotates through a total angle of 250°, the measuring probe 4 is controlled to work. The working time of the measuring probe 4 is equal to the time taken by the rotating base 2 to rotate through an angle of 50°. That is, when the rotating base 2 rotates through a total angle of 300°, the measuring probe 4 is controlled to be powered off, and the corresponding relationship between the magnetic field strength and time measured by the measuring probe 4 is recorded. After this step is completed, Figure 3As shown in state 11, at this time, the measuring probe 4 has measured the left boundary of the magnetic pole N3 (that is, the right boundary of the magnetic pole S2) and the maximum magnetic field intensity of the magnetic pole N3;

[0047] The magnetizing pole head 3 is controlled to discharge in the reverse direction. The time for the magnetizing pole head 3 to discharge in the reverse direction is less than the time for the rotating base 2 to rotate by an angle of 10°. When the magnetizing pole head 3 is powered off, the magnetizing of the magnetic pole S3 is completed, and the rotating base 2 continues to rotate at a constant speed until the total angle is 310°. Figure 3 Status 12 in;

[0048] When the rotating base 2 rotates through a total angle of 310°, the measuring probe 4 is controlled to work. The working time of the measuring probe 4 is equal to the time taken by the rotating base 2 to rotate through an angle of 50°. That is, when the rotating base 2 rotates through a total angle of 360° (one circle), the measuring probe 4 is controlled to be powered off, and the corresponding relationship between the magnetic field strength and time measured by the measuring probe 4 is recorded. After this step is completed, Figure 3 As shown in state 13 in FIG. 1 , at this time, the measuring probe 4 has measured the right boundary of the magnetic pole N3 (that is, the left boundary of the magnetic pole S3 ) and the maximum magnetic field intensity of the magnetic pole S3 ;

[0049] Up to now, the left boundary of magnetic pole N1 (that is, the right boundary of magnetic pole S3) has not been measured. On the basis of rotating the rotating base 2 through a total angle of 360°, it is further rotated at a uniform speed through an angle β (50°). At the same time, the magnetizing pole head 3 is kept inoperative and the measuring probe 4 is kept inoperative to measure the left boundary of magnetic pole N1 (that is, the right boundary of magnetic pole S3).

[0050] So far, the time points corresponding to the magnetic pole boundaries of the six magnetic poles N1, S1, N2, S2, N3, and S3 and the maximum magnetic field intensity of each magnetic pole have been measured.

[0051] Step 7: judging whether the pole width and magnetic field strength of the six poles of the annular magnetic scale 1 after magnetization meet the standards according to the total data measured by the measuring probe 4, and determining the annular magnetic scale 1 that meets the standards as a qualified product, and determining the annular magnetic scale 1 that does not meet the standards as a defective product;

[0052] The measurement data collector 500 collects the time points when the magnetic field strength measured by the measuring probe 4 is zero for two consecutive times, and transmits the corresponding relationship between the magnetic field strength and time to the host computer 600. The host computer 600 calculates the pole width of each pole of the annular magnetic scale 1 according to the time interval between the two consecutive magnetic field strengths being zero and the speed of the uniform rotation of the rotating base 2. If the pole widths of the six poles all fall within the setting range of the pole width of the annular magnetic scale 1, it indicates that the pole width of the annular magnetic scale 1 meets the standard. If the pole width of one pole does not meet the standard, the entire product is a defective product.

[0053] The measurement data collector 500 transmits the corresponding relationship between the collected magnetic field intensity and time to the host computer 600. The host computer 600 compares the maximum magnetic field intensity value with the set threshold value of the magnetic field intensity of the annular magnetic scale 1 based on the maximum magnetic field intensity value measured by the measuring probe 4 each time. If the maximum magnetic field intensity values ​​measured six times are all greater than the set threshold value, it indicates that the magnetic field strength of the annular magnetic scale 1 meets the standard. If the magnetic field strength of one pole does not meet the standard, the entire product is unqualified.

[0054] It should be noted that Figure 3 It is only for the purpose of intuitively presenting the principle diagram of the synchronous charging and measuring process of the present invention. In practical applications, for example, in the process from state 1 to state 2, when the annular magnetic scale 1 completes the magnetization of the magnetic pole N1, the entire annular magnetic scale 1 will carry the magnetism of the N pole, and there is no boundary (i.e. Figure 3 In each state, there should be no blank area on the ring of the annular magnetic scale 1. In order to facilitate the explanation of the synchronous charging and measuring principle, the attached Figure 3 Only the area where the magnetized pole head 3 acts is given polarity (shaded area), and other parts are replaced by blank areas.

[0055] At the same time, in order to facilitate the attachment Figure 3 The present invention adds the following Figure 4 , attached Figure 4 The timing diagram of alternating magnetization and measurement is shown in the figure. The magnetic field strength measured by the measuring probe 4 and the rotation angle of the annular magnetic scale 1 are used to represent the magnetic field strength. Figure 4 Point P1 in Figure 3 State 1, at this time, the magnetizing pole head 3 starts to magnetize the annular magnetic scale 1, and the magnetization ends at a point between P1 and P2. The measuring probe 4 starts measuring at point P2, corresponding to Figure 3 State 2, the measurement of point P3 ends, point P3 coincides with point P4 (in actual application, point P3 may be slightly earlier than point P4), and a new magnetization starts at point P4, corresponding to Figure 3 State 3; repeat the magnetization and measurement according to the above rules, that is, start the measurement at point P5, corresponding to Figure 3 State 4, the measurement ends at point P6, and a new magnetization starts at point P7 which coincides with point P6, corresponding to Figure 3 State 5; start measuring at point P8, corresponding to Figure 3 State 6, the measurement ends at point P9, and a new magnetization starts at point P10 which coincides with point P9, corresponding to Figure 3 State 7; start measuring at point P11, corresponding to Figure 3 State 8, the measurement ends at point P12, and a new magnetization starts at point P13 which coincides with point P12, corresponding to Figure 3 State 9; start measuring at point P14, corresponding to Figure 3The state 10, the measurement ends at point P15, and a new magnetization starts at point P16 which coincides with point P15, corresponding to Figure 3 State 11; start measuring at point P17, corresponding to Figure 3 State 12, the measurement ends at point P18, corresponding to Figure 3 state 13; so far, the annular magnetic scale 1 has rotated one circle (360°). In order to measure the boundary line between the head pole and the tail pole, the magnetizing pole head 3 is kept inoperative and the measuring probe 4 is operated. The annular magnetic scale 1 is then rotated at a uniform speed by an angle β (50°), and the magnetization and measurement work are completed at the same time.

[0056] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0057] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A synchronous charging and measuring device for annular magnetic scale, characterized in that: The invention comprises a rotating base (2) for fixing an annular magnetic scale (1) to be magnetized, a magnetizing pole head (3) located above the annular magnetic scale (1) to be magnetized and distributed along the circumference thereof, and a measuring probe (4); a total of m magnetic poles, which are cyclically alternating N and S poles, are required to be charged into one circle of the annular magnetic scale (1) to be magnetized, where m is a positive integer multiple of 2; the central angle α corresponding to a single N pole or S pole of the annular magnetic scale (1) to be magnetized is 360° / m; the magnetizing pole head (3) has a first pole edge (31) and a second pole edge (32) which constitute the pole width of the magnetizing pole head (3) distributed in sequence in the rotation direction of the rotating base (2); the measuring probe (4) is close to the second pole edge (32). ), the measuring probe (4) is regarded as a straight line, then the extension line of the straight line where the first pole edge (31), the second pole edge (32) and the measuring probe (4) are located all pass through the central axis of the annular magnetic scale (1) to be magnetized; the degree of the center angle β formed between the first pole edge (31) and the second pole edge (32) is less than 360° / m; the degree of the center angle γ formed between the measuring probe (4) and the second pole edge (32) is between (360° / m)-β and 180° / m; or when the measuring probe (4) rotates through an angle that is a positive integer multiple of 360° / m, the degree of the center angle formed between it and the second pole edge (32) is between (360° / m)-β and 180° / m; Furthermore, a central angle β formed between the first polar edge (31) and the second polar edge (32) is between 240° / m and 360° / m.

2. The synchronous charging and measuring device of annular magnetic scale according to claim 1, characterized in that: The invention comprises a main controller (100), wherein the main controller (100) is connected to a magnetizing timing controller (200) and a magnetizing polarity controller (300) in sequence, and the main controller (100) is connected to a magnetizing pole head (3) via the magnetizing timing controller (200) and the magnetizing polarity controller (300) for controlling the magnetizing time and the magnetizing polarity of the magnetizing pole head (3); the main controller (100) is also connected to a measuring timing controller (400), and the main controller (100) is connected to a measuring probe (4) via the measuring timing controller (400) for controlling the measuring time of the measuring probe (4), and the measuring probe (4) is connected to a measuring data collector (500), and the measuring data collector (500) is used to collect magnetic field intensity data measured by the measuring probe (4) in real time, and the measuring data collector (500) is connected to a host computer (600).

3. A synchronous charging and measuring method for a synchronous charging and measuring device of an annular magnetic scale according to claim 1 or 2, characterized in that: The following steps are involved: Step 1: Keep the rotating base (2) stationary, and fix the annular magnetic scale (1) to be magnetized on the rotating base (2); Step 2, controlling the rotating base (2) to rotate at a constant speed, and controlling the magnetizing pole head (3) to discharge forwardly while the rotating base (2) is started, the time for the magnetizing pole head (3) to discharge forwardly is shorter than the time taken for the rotating base (2) to rotate through an angle α-β, and when the magnetizing pole head (3) is powered off, the magnetization of a single N pole or S pole is completed; Step 3, starting the discharge timing of the magnetizing pole head (3) from step 2, when the rotating base (2) rotates through the angle α-β, controlling the measuring probe (4) to work, the working time of the measuring probe (4) is equal to the time taken for the rotating base (2) to rotate through the angle β, when the rotating base (2) rotates through the angle β, controlling the measuring probe (4) to cut off the power, and recording the corresponding relationship between the magnetic field intensity and time measured by the measuring probe (4); Step 4: When the measuring probe (4) in step 3 is powered off, the magnetizing pole head (3) is controlled to discharge in the reverse direction. The time for the magnetizing pole head (3) to discharge in the reverse direction is less than the time taken by the rotating base (2) to rotate through the angle α-β. When the magnetizing pole head (3) is powered off, a single magnetic pole having a magnetic property opposite to that in step 2 is obtained. Step 5, starting the discharge timing of the magnetizing pole head (3) from step 4, when the rotating base (2) rotates through the angle α-β, controlling the measuring probe (4) to work, the working time of the measuring probe (4) is equal to the time taken for the rotating base (2) to rotate through the angle β, when the rotating base (2) rotates through the angle β, controlling the measuring probe (4) to cut off the power, and recording the corresponding relationship between the magnetic field intensity and time measured by the measuring probe (4); Step 6: Repeat steps 2 to 5 until all m magnetic poles are magnetized and measured; Step 7: Determine whether the pole width and magnetic field strength of each pole of the annular magnetic scale (1) after magnetization meet the standards based on the total data measured by the measuring probe (4); determine the annular magnetic scale (1) that meets the standards as a qualified product, and determine the annular magnetic scale (1) that does not meet the standards as a failed product.

4. The synchronous charging and testing method according to claim 3, characterized in that: The steps 1 to 7 are cyclically performed to realize continuous charging and testing of the annular magnetic scale (1); when a defective product is produced in step 7, the operation of the synchronous charging and testing equipment is stopped, and the equipment is tested and calibrated before being put into operation again.

5. The synchronous charging and testing method according to claim 3, characterized in that: In step 7, the pole width of each pole of the annular magnetic scale (1) is calculated based on the time interval between two consecutive zero magnetic field intensities measured by the measuring probe (4) and the uniform rotation speed of the rotating base (2). If the pole width of each pole falls within the set range of the pole width of the annular magnetic scale (1), it indicates that the pole width of each pole of the annular magnetic scale (1) meets the standard.

6. The synchronous charging and testing method according to claim 3, characterized in that: In step seven, the maximum magnetic field strength value measured by the measuring probe (4) each time is compared with the set threshold value of the magnetic field strength of the annular magnetic scale (1). If the maximum magnetic field strength value measured each time is greater than the set threshold value, it indicates that the magnetic field strength of each pole of the annular magnetic scale (1) meets the standard.

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