Inductosyn error self-detection device and detection method

Abstract

The invention discloses an inductosyn error self-detection device and a detection method. The device comprises an indexing turntable, a common rotating shaft, an upper inductosyn, a lower inductosyn, an upper stator tray and a lower stator tray, an output shaft of the indexing turntable is connected with the common rotating shaft and drives the common rotating shaft to rotate; a plurality of seat frames are evenly arranged on the upper end face of the indexing rotary table at intervals, and each seat frame is connected with an upper supporting frame and a lower supporting frame which are vertically arranged at intervals. The upper end surface of the lower stator tray is fixedly connected with the lower inductosyn stator, and the lower end surface is fixedly connected with the lower support frame; and the lower inductosyn rotor is fixedly connected with the common rotating shaft. Through the scheme provided by the invention, high-precision error separation of the inductosyn can be realized, higher-precision angle measurement equipment is not needed, error separation of the detected inductosyn can be realized only through self-detection measurement of mutual comparison of the two inductosyn, and the device is simple in structure, convenient to operate and convenient to popularize and use in industry.

Description

Technical Field

[0001] The present invention relates to the technical field of induction synchronizer error, and in particular to an induction synchronizer error self-detection device and detection method. Background Art

[0002] An induction synchronizer is a device that uses electromagnetic principles to convert linear displacement or angular displacement into electrical signals. It is generally divided into circular induction synchronizers and linear induction synchronizers based on the difference in movement mode and purpose. The induction synchronizer consists of two parts, the moving part and the fixed part, among which the circular induction synchronizer consists of a rotor and a stator. The rotor winding is generally made into a continuous type, called a continuous winding, which consists of an effective conductor and inner and outer ends. The number of effective conductors is equal to the number of poles of the rotary induction synchronizer. The distance between the center lines of adjacent conductors is the pole pitch. The stator winding is generally made into a segmented type, called a segmented winding. If we assume that the number of phase groups is N, then the winding is generally composed of 2N groups of conductors, which belong to phase A and phase B. Each group is composed of an effective conductor and an end in series, and each group belonging to the same phase is connected to form one phase by a connecting line. The distance between each adjacent conductor of the segmented winding is the pitch.

[0003] When the induction synchronizer is working, inputting an AC power supply into the continuous winding will form an alternating magnetic field in space. If the stator only has one induction coil, a sine wave or cosine wave with a period will be induced in the induction coil for each relative movement of the stator and rotor. The one-phase winding of the stator is obtained by connecting several induction coils in series, and its one-phase output voltage is the sum of the output voltages of each induction coil. The purpose of the induction synchronizer is to convert the position signal into an electrical signal output. It is impossible to obtain the angular displacement value corresponding to the zero point and peak point potential only by the induced potential of one phase. This is because except for the zero point potential and the peak point potential corresponding to one position angle, any other potential has two position angles corresponding to it, so it is impossible to resolve the angular position. Therefore, the stator part is made into a two-phase orthogonal winding, and the two-phase windings are spaced apart by electrical angles, which are defined as sine windings and cosine windings respectively. In this way, each position angle can be determined by the output potentials of the sine winding and the cosine winding.

[0004] The position measurement of induction synchronizers is not perfect. For example, insufficient manufacturing precision will cause dimensional deviations, conditional errors caused by installation and adjustment, and inherent principle errors caused by the existence of harmonic magnetic fields and harmonic potentials in induction synchronizer components. The result of the above phenomenon is that the position measurement of induction synchronizers will introduce errors. Induction synchronizers account for a large proportion of the angular position measurement market, and high precision is a major advantage compared to other angle measurement components. However, the accuracy measurement of high-precision induction synchronizers often places higher requirements on the accuracy of the measuring equipment, which is often difficult to achieve. Summary of the invention

[0005] In order to meet the accuracy measurement requirements for high-precision induction synchronizers, the purpose of the present invention is to provide an induction synchronizer error self-detection device and detection method.

[0006] To achieve the purpose of the present invention, the technical solution provided by the present invention is specifically as follows:

[0007] First aspect

[0008] This embodiment provides an induction synchronizer error self-detection device, comprising a dividing turntable, a common rotating shaft, an upper induction synchronizer, a lower induction synchronizer, an upper stator tray, and a lower stator tray;

[0009] The output shaft of the indexing turntable is connected to the common rotating shaft and drives the common rotating shaft to rotate;

[0010] The upper end surface of the indexing turntable is evenly spaced with a plurality of seats, each of which is connected to an upper support frame and a lower support frame spaced apart from each other;

[0011] The upper end surface of the lower stator tray is fixedly connected to the lower induction synchronizer stator, and the lower end surface is fixedly connected to the lower support frame;

[0012] The lower induction synchronizer rotor is fixedly connected to the common rotating shaft;

[0013] The lower end surface of the upper stator tray is fixedly connected to the upper support frame and to the upper induction synchronizer stator, and the upper induction synchronizer rotor is detachably connected to the common rotating shaft;

[0014] When the lower induction synchronizer needs to be rotated independently, the upper induction synchronizer rotor is separated from the common rotating shaft, moves upward a certain distance, and is fixedly connected to the upper support frame.

[0015] Second aspect

[0016] The present invention also provides an induction synchronizer error self-detection method, comprising the following steps:

[0017] Step S1: constructing the induction synchronizer error self-detection device as described above;

[0018] Step S2: using the constructed induction synchronizer error self-detection device to perform error detection;

[0019] The error detection includes a plurality of measurement rounds, wherein in each measurement round, the upper inductive synchronizer and the lower inductive synchronizer rotate together with the common rotating shaft, and the corresponding angle position signal is output in real time through the angle measuring circuit at the preset n measurement positions, and the readings of the upper inductive synchronizer and the lower inductive synchronizer are directly read from the angle display device, and the difference between the two is filled into the error table; between two measurement rounds, the upper inductive synchronizer does not rotate, and the lower inductive synchronizer rotates by a preset angle value relative to the upper inductive synchronizer;

[0020] Step S3: A matrix is ​​obtained by comparing the data at the same position point in each measurement, and the error data of the two induction synchronizers are separated by a combined comparison method.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] Through the scheme provided by the present invention, high-precision error separation of the inductive synchronizer itself can be achieved without the need for higher-precision angle measurement equipment. Error separation of the inductive synchronizer under test can be achieved only through self-detection measurement of two inductive synchronizers compared with each other. The structure is simple, easy to operate, and easy to promote and use in the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a cross-sectional structure of a device provided in an embodiment of the present application;

[0024] In the figure, the indexing turntable 1, the common rotating shaft 2, the upper induction synchronizer stator 3, the upper induction synchronizer rotor 4, the upper stator tray 5, the lower stator tray 6, the upper induction synchronizer rotor pad 7, the upper support frame 8, the lower support frame 9, the seat frame 10, the lower induction synchronizer rotor 11, and the lower induction synchronizer stator 12;

[0025] Figure 2 A schematic diagram of a three-dimensional cross-sectional structure of a device provided in an embodiment of the present application;

[0026] Figure 3 A schematic diagram of the structure of the indexing turntable of the device provided in the embodiment of the present application;

[0027] Figure 4 A first schematic diagram of the connection structure between the seat frame and the upper support frame and the lower support frame provided in an embodiment of the present application;

[0028] Figure 5 A second schematic diagram of the connection structure between the seat frame and the upper support frame and the lower support frame provided in an embodiment of the present application;

[0029] Figure 6 A schematic diagram of the structure of a common rotating shaft provided in an embodiment of the present application;

[0030] Figure 7 A schematic diagram of the structure of an upper stator tray provided in an embodiment of the present application;

[0031] Figure 8 A schematic structural diagram of the lower stator tray provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] As a position sensor, the accuracy of the induction synchronizer is the most important technical indicator of this component. The accuracy of the induction synchronizer is determined by its own error. Only by obtaining the error of the induction synchronizer can the error be corrected, and only in this way can the accuracy of the induction synchronizer be guaranteed. The induction synchronizer error self-detection device of a new structure provided by the present invention can realize the high-precision error separation of the induction synchronizer itself without the need for a higher-precision angle measurement device. Only through the self-detection measurement of two induction synchronizers compared with each other, the error separation of the induction synchronizer under test can be realized.

[0034] Example 1

[0035] like Figure 1-Figure 8 As shown, the present embodiment provides an induction synchronizer error self-detection device, comprising a dividing turntable 1, a common rotating shaft 2, an upper induction synchronizer, a lower induction synchronizer, an upper stator tray 5, and a lower stator tray 6;

[0036] The output shaft of the indexing turntable 1 is connected to the common rotating shaft 2 and drives the common rotating shaft 2 to rotate;

[0037] The upper end surface of the indexing turntable 1 is evenly spaced with a plurality of seats 10, and each of the seats 10 is connected to an upper support frame 8 and a lower support frame 9 spaced apart from each other;

[0038] The upper end surface of the lower stator tray 6 is fixedly connected to the lower induction synchronizer stator 12, and the lower end surface is fixedly connected to the lower support frame 9;

[0039] The lower induction synchronizer rotor 11 is fixedly connected to the common rotating shaft 2;

[0040] The lower end surface of the upper stator tray 5 is fixedly connected to the upper support frame 8 and is fixedly connected to the upper induction synchronizer stator 3. The upper induction synchronizer rotor 4 is detachably connected to the common rotating shaft 2.

[0041] When the lower induction synchronizer needs to be rotated independently, the upper induction synchronizer rotor 4 is separated from the common rotating shaft 2, and moves upward a certain distance, and is fixedly connected to the upper support frame 8. When the common rotating shaft 2 rotates, only the lower induction synchronizer rotor 11 rotates, and the upper induction synchronizer does not rotate.

[0042] The air gap between the lower induction synchronizer stator 12 and the lower induction synchronizer rotor 11 is 0.2 mm. The air gap between the upper induction synchronizer stator 3 and the upper induction synchronizer rotor 4 is 0.2 mm.

[0043] It should be noted that the outer diameter of the upper induction synchronizer and the lower induction synchronizer are both 86mm, the inner diameter is 72mm, and the accuracy is 1". During each measurement process, the upper and lower induction synchronizers are connected to the rotating shaft system 2 and rotate with the shaft.

[0044] Preferably, when the upper induction synchronizer rotor 4 is fixedly connected to the upper support frame 8 , an upper induction synchronizer rotor pad 7 is provided between the upper induction synchronizer rotor 4 and the common rotating shaft 2 to ensure the horizontal relative position of the upper induction synchronizer rotor 4 .

[0045] Preferably, there are four seats. The load-bearing and centering positioning of the induction synchronizer self-testing device are completed by the upper stator tray 5, the lower stator tray 6, the upper support frame 8, the lower support frame 9, the seat frame 10, and the rotary indexing table 1.

[0046] It should be noted that Figure 2 There is a seat frame and an upper support frame and a lower support frame connecting structure which are not drawn.

[0047] Preferably, the upper support frame 8 includes a first longitudinal portion and a first transverse portion, and is connected to the seat frame 10 through the first longitudinal portion, and is connected to the upper stator tray 5 and the upper induction synchronizer rotor 4 through the first transverse portion. The upper end surface and the lower end surface of the first transverse portion are both provided with threaded holes, and screws are respectively used to pass through the upper stator tray 5 and the upper induction synchronizer rotor 4 to be threadedly connected with the corresponding threaded holes.

[0048] In order to ensure the positioning of the upper induction synchronizer rotor 4 when it is separated from and connected to the common rotating shaft 2, the following design is made: the upper support frame 8 is separated from the upper induction synchronizer rotor 4 when not in use, and the vertical positioning is achieved by drilling screw holes in the upper induction synchronizer rotor 4 and the upper support frame 8. Each time the upper induction synchronizer rotor 4 is moved vertically, it is connected by 4 screws to ensure that no additional measurement error is introduced.

[0049] Preferably, the lower support frame 9 includes a second longitudinal portion and a second transverse portion, is connected to the seat frame 10 through the second longitudinal portion, and is fixedly connected to the lower stator tray 6 through the second transverse portion. A threaded hole is provided on the second transverse portion, and a screw is passed through the lower stator tray 6 to be threadedly connected to the threaded hole.

[0050] Example 2

[0051] The present embodiment provides a method for self-detection of induction synchronizer errors, comprising the following steps:

[0052] Step S1: constructing the induction synchronizer error self-detection device as described above;

[0053] Step S2: using the constructed induction synchronizer error self-detection device to perform error detection;

[0054] The error detection includes a plurality of measurement rounds, wherein in each measurement round, the upper inductive synchronizer and the lower inductive synchronizer rotate together with the common rotating shaft, and the corresponding angle position signal is output in real time through the angle measuring circuit at the preset n measurement positions, and the readings of the upper inductive synchronizer and the lower inductive synchronizer are directly read from the angle display device, and the difference between the two is filled into the error table; between two measurement rounds, the upper inductive synchronizer does not rotate, and the lower inductive synchronizer rotates relative to the upper inductive synchronizer by a predetermined angle value;

[0055] After one measurement is completed, the upper induction synchronizer rotor 4 is moved up and fixedly connected to the upper support frame 8, and the fixation of the upper induction synchronizer rotor 4 and the common rotating shaft 2 is released, so that the independence between the upper induction synchronizer rotor 4 and the common rotating shaft 2 is realized, and the lower induction synchronizer rotor 11 is always connected to the common rotating shaft 2, so that independent rotation between the two rotors can be realized, that is, the lower induction synchronizer rotor 11 rotates with the common rotating shaft 2.

[0056] Each measured gap can rotate the common rotating shaft 2 to make the rotors of the two induction synchronizers staggered by a relative angle. When the upper induction synchronizer rotor 4 is fixedly connected to the upper support frame 8, an upper induction synchronizer rotor pad 7 is arranged between the upper induction synchronizer rotor 4 and the common rotating shaft 2 to ensure the horizontal relative position of the upper induction synchronizer rotor 4.

[0057] Step S3: A matrix is ​​obtained by comparing the data at the same position point in each measurement, and the error data of the two induction synchronizers are separated by a combined comparison method.

[0058] The details are as follows: after a measurement starts, the two induction synchronizers can rotate together with the common shaft, and the corresponding angle position signals are output in real time through the angle measurement circuit at n measurement positions. The readings of the two induction synchronizers are directly read from the angle display device, and the difference between the two is filled in the error table for future use.

[0059] The zero position of the upper induction synchronizer is selected as the reference zero. Taking the actual measurement of 6 rounds with 60° as the interval angle of each round as an example, the actual test method based on the combined mutual comparison method is explained. Before the first round of measurement, both induction synchronizers are adjusted to the state where the digital display reading is zero, and 6 mutual comparison measurements are performed with 0° as the starting position, and the readings of the upper induction synchronizer ψ are read out respectively. a(1,1) , a(1,2), a(1,3) , a(1,4) , a(1,5) , a(1,6) , the reading of the lower induction synchronizer ψ b(1,1) , b(1,2) , b(1,3) , b(1,4) , b(1,5) , b(1,6) In the gap between the measurement rounds, after one measurement round is completed, the upper induction synchronizer rotor 4 is moved up and fixedly connected to the upper support frame 8, and the upper induction synchronizer rotor 4 and the common rotating shaft 2 are released, so that the upper induction synchronizer rotor 4 and the common rotating shaft 2 are independent, and the lower induction synchronizer is rotated clockwise by an angle relative to the upper induction synchronizer. After that, the second measurement is carried out, and the upper induction synchronizer still starts at 0°. A new set of data is measured, and the readings of the upper induction synchronizer ψ are read respectively. a(2,1) , a(2,2) , a(2,3) , a(2,4) , a(2,5) , a(2,6) , the reading of the lower induction synchronizer ψ b(2,1) , b(2,2) , b(2,3) , b(2,4) , b(2,5) , b(2,6) Repeat this process to complete 6 rounds of measurement, each of which contains 6 upper induction synchronizer measurement values ​​ψ a(i,j) and 6 lower induction synchronizer measurements ψ b(i,j) Then, the data of the upper induction synchronizer and the lower induction synchronizer at the same position point in each measurement are compared to obtain a 6×6 matrix, and then the error data of the upper induction synchronizer and the lower induction synchronizer can be separated by the combined comparison method.

[0060] The optional implementation modes of the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical scheme of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

Claims

1. An induction synchronizer error self-detection device, characterized in that: It comprises a dividing turntable (1), a common rotating shaft (2), an upper inductive synchronizer, a lower inductive synchronizer, an upper stator tray (5), and a lower stator tray (6); The output shaft of the indexing turntable (1) is connected to the common rotating shaft (2) and drives the common rotating shaft (2) to rotate; A plurality of seats (10) are evenly spaced apart on the upper end surface of the indexing turntable (1), and each of the seats (10) is connected to an upper support frame (8) and a lower support frame (9) spaced apart from each other. The upper end surface of the lower stator tray (6) is fixedly connected to the lower induction synchronizer stator (12), and the lower end surface is fixedly connected to the lower support frame (9); The lower induction synchronizer rotor (11) is fixedly connected to the common rotating shaft (2); The lower end surface of the upper stator tray (5) is fixedly connected to the upper support frame (8) and is also fixedly connected to the upper induction synchronizer stator (3); the upper induction synchronizer rotor (4) is detachably connected to the common rotating shaft (2); When the lower induction synchronizer needs to be rotated independently, the upper induction synchronizer rotor (4) is separated from the common rotating shaft (2), moved upwards a certain distance, and fixedly connected to the upper support frame (8).

2. The induction synchronizer error self-detection device according to claim 1, characterized in that: When the upper induction synchronizer rotor (4) is fixedly connected to the upper support frame (8), an upper induction synchronizer rotor pad (7) is arranged between the upper induction synchronizer rotor (4) and the common rotating shaft (2).

3. The induction synchronizer error self-detection device according to claim 1, characterized in that: There are four seats.

4. The induction synchronizer error self-detection device according to claim 1, characterized in that: The air gap between the lower induction synchronizer stator (12) and the lower induction synchronizer rotor (11) is 0.2 mm.

5. The induction synchronizer error self-detection device according to claim 1, characterized in that: The air gap between the upper induction synchronizer stator (3) and the upper induction synchronizer rotor (4) is 0.2 mm.

6. The induction synchronizer error self-detection device according to claim 1, characterized in that: The upper support frame (8) comprises a first longitudinal portion and a first transverse portion, is connected to the seat frame (10) via the first longitudinal portion, and is connected to the upper stator tray (5) and the upper induction synchronizer rotor (4) via the first transverse portion.

7. The induction synchronizer error self-detection device according to claim 6, characterized in that: The upper end surface and the lower end surface of the first transverse portion are both provided with threaded holes, and screws are respectively passed through the upper stator tray (5) and the upper induction synchronizer rotor (4) to be threadedly connected with the corresponding threaded holes.

8. The induction synchronizer error self-detection device according to claim 1, characterized in that: The lower support frame (9) comprises a second longitudinal portion and a second transverse portion, is connected to the seat frame (10) via the second longitudinal portion, and is fixedly connected to the lower stator tray (6) via the second transverse portion.

9. The induction synchronizer error self-detection device according to claim 8, characterized in that: The second transverse portion is provided with a threaded hole, and a screw is passed through the lower stator tray (6) to be threadedly connected with the threaded hole.

10. A method for self-detection of induction synchronizer error, characterized in that: The steps include: Step S1: constructing an induction synchronizer error self-detection device as described in any one of claims 1 to 9; Step S2: using the constructed induction synchronizer error self-detection device to perform error detection; The error detection includes a plurality of measurement rounds, wherein in each measurement round, the upper inductive synchronizer and the lower inductive synchronizer rotate together with the common rotating shaft, and the corresponding angle position signal is output in real time through the angle measuring circuit at the preset n measurement positions, and the readings of the upper inductive synchronizer and the lower inductive synchronizer are directly read from the angle display device, and the difference between the two is filled into the error table; between two measurement rounds, the upper inductive synchronizer does not rotate, and the lower inductive synchronizer rotates by a preset angle value relative to the upper inductive synchronizer; Step S3: A matrix is ​​obtained by comparing the data at the same position point in each measurement, and the error data of the two induction synchronizers are separated by a combined comparison method.

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