Winding method of RVDT sensor

Abstract

The invention provides a winding method of an RVDT sensor, and belongs to the technical field of sensors. The RVDT sensor realizes electromagnetic induction by embedding coils on four salient poles 1, 2, 3 and 4 of a stator, and the winding method comprises the following steps of: respectively embedding and winding four primary coils N11, N12, N13 and N14 on the four salient poles 1, 2, 3 and 4 of the stator of the RVDT sensor, and connecting the primary coils in series to form a primary side coil as an input end; four secondary coils N21, N23, N24 and N22 are respectively wound on four salient poles 1, 3, 4 and 2 of the stator in an embedded manner, and the secondary coils are connected in series to form a secondary coil as an output end; compensation coils N31 and N32 are respectively wound on the two salient poles 1 and 2 of the stator in an embedded mode, and the compensation coils N31 and N32 are connected in series and then connected with a center tap of the secondary coil. According to the winding method, the winding difficulty of the RVDT sensor is reduced, the operability is high, and the percent of pass and the production efficiency of the RVDT sensor are greatly improved after the RVDT sensor is applied.

Description

Technical Field

[0001] The invention belongs to the technical field of sensors, and in particular relates to a winding method for an RVDT sensor. Background Art

[0002] RVDT sensor is a non-contact angular displacement sensor based on the principle of electromagnetic induction. Compared with other angular displacement sensors, it has the advantages of high reliability and strong environmental adaptability. It also has the characteristics of theoretical infinite life and no need for chips. It is an important trend in the development of angular displacement sensors in the future and is widely used in defense industry fields such as aerospace, aviation, weapons and ships.

[0003] The thresholds for RVDT sensor technology, process, and production are relatively high. The technical characteristics determine that it cannot be mass-produced automatically. One of the main technical difficulties is that the deviation of RVDT sensor accuracy is irregular, and the individual accuracy curve deviation is large, such as Figure 3 , Figure 4 As shown in the figure, the coil winding compensation measures are complicated and inconsistent, and each sensor needs to be compensated and tested individually and repeatedly, which affects the product qualification rate and production efficiency. Therefore, it is necessary to design a new RVDT sensor winding method to reduce the difficulty of RVDT sensor winding. Summary of the invention

[0004] The technical problem solved by the present invention is to provide a winding method for an RVDT sensor, aiming to reduce the difficulty of winding the RVDT sensor and improve the sensor product qualification rate and production efficiency.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A winding method for an RVDT sensor, wherein the RVDT sensor realizes electromagnetic induction by embedding coils on four salient poles 1, 2, 3, and 4 of a stator, and the winding method comprises the following steps:

[0007] Step 1): Four primary coils N11, N12, N13, N14 are respectively wound around the four salient poles 1, 2, 3, 4 of the stator of the RVDT sensor, and the primary coils N11, N12, N13, N14 are connected in series to form a primary side coil as the input end;

[0008] Step 2): Four secondary coils N21, N23, N24, and N22 are respectively wound around the four salient poles 1, 3, 4, and 2 of the stator, and the secondary coils N21, N23, N24, and N22 are connected in series to form a secondary coil as an output end;

[0009] Step 3): Perform initial performance test on the RVDT sensor and draw an accuracy curve;

[0010] Step 4): Compensation coils N31 and N32 are respectively wound around the two salient poles 1 and 2 of the stator, and the compensation coils N31 and N32 are connected in series to the middle tap of the secondary coil;

[0011] Step 5): Fine-tune the shape of the compensation coil according to the RVDT sensor accuracy curve to achieve fine compensation for the sensor accuracy;

[0012] Step 6): Complete sensor assembly, test performance, and verify the effect.

[0013] Further limitation of the above scheme: in the above step 1), the winding directions of the primary coils on the four salient poles 1, 2, 3, 4 of the stator are clockwise, clockwise, counterclockwise, and counterclockwise, respectively.

[0014] Further limitation of the above scheme: in the above step 2), the winding directions of the secondary coils on the four salient poles 1, 3, 4, 2 of the stator are clockwise, counterclockwise, clockwise, and counterclockwise, respectively.

[0015] Further limitation of the above scheme: in the above step 4), the winding directions of the compensation coils on the two salient poles 1 and 2 of the stator are clockwise and clockwise respectively.

[0016] The advantages of the present invention compared with the prior art are:

[0017] This method is designed to improve the accuracy of RVDT sensor products. It is a new RVDT sensor winding method. By optimizing the secondary coil winding method and direction in the traditional winding method, the difficulty of operations such as embedding the wire is reduced; the winding method of the compensation coil is optimized to greatly improve the overall accuracy of the sensor. This method is summarized from a large number of winding practices and does not draw on other similar products. Compared with the traditional winding method, it reduces the difficulty of RVDT sensor winding and has strong operability. After application, it greatly improves the qualification rate and production efficiency of this type of sensor, and has great application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the winding diagram of RVDT sensor No. 1 in the embodiment of the present invention;

[0019] Figure 2 This is the winding diagram of RVDT sensor 2# in the embodiment of the present invention;

[0020] Figure 3 This is the accuracy curve of RVDT sensor No. 1 in the traditional method;

[0021] Figure 4 This is the accuracy curve of RVDT sensor 2# in the traditional method;

[0022] Figure 5 This is the winding diagram of the traditional RVDT sensor. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-5 , describe the embodiments of the present invention in detail.

[0025] The RVDT sensor realizes electromagnetic induction by embedding coils on the four salient poles 1, 2, 3, and 4 of the stator. The traditional theoretical winding method is: four primary coils are respectively embedded on the four salient poles of the stator, namely N11, N12, N13, and N14, and they are connected in series to form the primary side coil. When the AC excitation voltage U is supplied, the magnetic flux generated on each salient pole of the stator is Φ1, Φ2, Φ3, and Φ4. Due to the changing magnetic field in the iron core, induced electromotive force will be generated in the four secondary coils (N21, N22, N23, and N24). Then the compensation coil is realized by continuing to embed coils on the salient poles of the stator. Four compensation coils are respectively embedded on the four salient poles of the stator, namely N31, N32, N33, and N34. They are connected in series and connected to the middle tap of the secondary coil to realize compensation of the overall data of the sensor. Figure 5 shown.

[0026] This embodiment proposes a novel RVDT sensor winding method, which includes the following steps:

[0027] Step 1): Four primary coils N11, N12, N13, N14 are respectively wound around the four salient poles 1, 2, 3, 4 of the stator of the RVDT sensor, and the primary coils N11, N12, N13, N14 are connected in series to form a primary side coil as the input end;

[0028] Preferably, the winding directions of the primary coils on the four salient poles 1, 2, 3, and 4 of the stator are clockwise, clockwise, counterclockwise, and counterclockwise, respectively.

[0029] Step 2): Four secondary coils N21, N23, N24, and N22 are respectively wound around the four salient poles 1, 3, 4, and 2 of the stator, and the secondary coils N21, N23, N24, and N22 are connected in series to form a secondary coil as an output end;

[0030] Preferably, the winding directions of the secondary coils on the four salient poles 1, 3, 4, 2 of the stator are clockwise, counterclockwise, clockwise, and counterclockwise, respectively, which not only reduces the difficulty of operation but also improves the independent linearity of the sensor.

[0031] Step 3): Perform initial performance test on the RVDT sensor and draw an accuracy curve;

[0032] Step 4): Compensation coils N31 and N32 are respectively wound around the two salient poles 1 and 2 of the stator, and the compensation coils N31 and N32 are connected in series to the middle tap of the secondary coil;

[0033] Preferably, the winding directions of the compensation coils on the two salient poles 1 and 2 of the stator are clockwise and clockwise, respectively, which further reduces the difficulty of operation and greatly improves the overall accuracy of the sensor.

[0034] Step 5): Fine-tune the shape of the compensation coil according to the RVDT sensor accuracy curve to achieve fine compensation for sensor accuracy. Figure 1 and Figure 2 ; This coil winding method is used for compensation, which greatly improves the overall accuracy of the sensor;

[0035] Step 6): Complete sensor assembly, test performance, and verify the effect.

[0036] The method of the present invention is to improve the accuracy of RVDT sensor products by optimizing the secondary coil winding method and direction in the traditional winding method, reducing the difficulty of operations such as embedding wires, and optimizing the winding method of the compensation coil to greatly improve the overall accuracy of the sensor. This method is summarized from a large number of winding practices and does not draw on other similar products. Compared with the traditional winding method, it reduces the difficulty of winding the RVDT sensor and has strong operability. After application, it greatly improves the qualified rate and production efficiency of this type of sensor, and has great application value.

[0037] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A winding method for an RVDT sensor, wherein the RVDT sensor realizes electromagnetic induction by embedding coils on four salient poles 1, 2, 3, and 4 of a stator, characterized in that: The winding method comprises the following steps: Step 1): Four primary coils N11, N12, N13, N14 are respectively wound around the four salient poles 1, 2, 3, 4 of the stator of the RVDT sensor, and the primary coils N11, N12, N13, N14 are connected in series to form a primary side coil as the input end; Step 2): Four secondary coils N21, N23, N24, and N22 are respectively wound around the four salient poles 1, 3, 4, and 2 of the stator, and the secondary coils N21, N23, N24, and N22 are connected in series to form a secondary coil as an output end; Step 3): Perform initial performance test on the RVDT sensor and draw an accuracy curve; Step 4): Compensation coils N31 and N32 are respectively wound around the two salient poles 1 and 2 of the stator, and the compensation coils N31 and N32 are connected in series to the middle tap of the secondary coil; Step 5): Fine-tune the shape of the compensation coil according to the RVDT sensor accuracy curve to achieve fine compensation for the sensor accuracy; Step 6): Complete sensor assembly, test performance, and verify the effect.

2. The winding method of a RVDT sensor according to claim 1, characterized in that: In the above step 1), the winding directions of the primary coils on the four salient poles 1, 2, 3, and 4 of the stator are clockwise, clockwise, counterclockwise, and counterclockwise, respectively.

3. The winding method of a RVDT sensor according to claim 1, characterized in that: In the above step 2), the winding directions of the secondary coils on the four salient poles 1, 3, 4, and 2 of the stator are clockwise, counterclockwise, clockwise, and counterclockwise, respectively.

4. The winding method of a RVDT sensor according to claim 1, characterized in that: In the above step 4), the winding directions of the compensation coils on the two salient poles 1 and 2 of the stator are clockwise and clockwise respectively.

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