CN116296072A - Early detection device and detection method for static unbalance of flexible gyroscope flywheel assembly - Google Patents
Early detection device and detection method for static unbalance of flexible gyroscope flywheel assembly Download PDFInfo
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- CN116296072A CN116296072A CN202211555390.XA CN202211555390A CN116296072A CN 116296072 A CN116296072 A CN 116296072A CN 202211555390 A CN202211555390 A CN 202211555390A CN 116296072 A CN116296072 A CN 116296072A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/14—Determining imbalance
- G01M1/16—Determining imbalance by oscillating or rotating the body to be tested
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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Abstract
The invention relates to a device and a method for detecting the static unbalance of a flywheel component of a flexible gyroscope in earlier stage, which are characterized in that: the mounting seat and the magnetic conducting core are made of the same soft magnetic alloy; the outer extending column body of the flexible joint of the flywheel component is penetrated and assembled with the central hole on the mounting seat and is fixed by the locking nut; the four magnetic cores are inserted and fixed in four magnetic core mounting holes on the mounting seat, and air gaps are arranged between the upper ends of the four magnetic cores and the lower end of the flywheel component; the four excitation coils are respectively wound on the upper extending parts of the four magnetic cores and are sequentially connected in series; the head end and the tail end of the four exciting coils are externally connected with a measuring circuit, and two groups of resistors of the measuring circuit are connected with the exciting coils in parallel to form a bridge type measuring circuit; the head ends and the tail ends of the four exciting coils are connected with an alternating current power supply and are alternating current voltage input ends, an output line is led out from the middle connecting point of the four exciting coils, another output line is led out from the middle connecting point of the measuring line, and the two output line ends form a measuring output end. The invention improves the accuracy of the gyroscope and has no damage to the joint.
Description
Technical Field
The invention belongs to the field of flexible gyroscopes, and particularly relates to a device and a method for detecting the static unbalance of a flywheel component of a flexible gyroscope in the early stage.
Background
The miniature flexible gyroscope is used as a high-precision instrument, and basically comprises a driving shaft driven by a motor, and finally drives a flywheel component to rotate at a high speed through an inner flexible shaft, a balance ring and an outer flexible shaft to obtain angular momentum for navigation and positioning. The flexible joint of the micro-flexible gyroscope allows the rotation of the instrument housing with respect to the flywheel about two orthogonal axes, the elastic stiffness of the flexible support being compensated by the dynamic effect produced by the support itself, to achieve the free state of the rotor and to output a voltage proportional to the rotation angle through the sensor stator mounted on the housing. The micro-flex gyroscope can be sensitive to angular velocities in two directions, i.e. it has two degrees of freedom. The miniature flexible gyroscope generally works under the force feedback closed-loop condition, and the gyroscope rotates along with the relative inertial space of the shell through the feedback moment acting rotor, so that the instrument is indicated to work.
The miniature flexible gyroscope flywheel component basically comprises a driving shaft, a flexible joint and a flywheel component. The flexible joint has inner and outer flexible shafts which provide flexible support for the flywheel assembly. If the center of gravity of the flywheel assembly is located on the supporting center, the flywheel assembly does not drift due to the change of the gravitational acceleration. In fact, the flywheel component parts are affected by various factors such as machining precision, dimensional tolerance, material uniformity and the like, the gravity center of the component always deviates from the supporting center, the supporting center is formed by an inner flexible shaft and an outer flexible shaft, the two shafts are different by 90 degrees and cannot be in the same plane, and therefore, the gyroscope and acceleration related drift caused by the factors are difficult to avoid.
Two methods are generally adopted for reducing the influence of unbalance, namely, an adjusting mechanism is added to a component to assemble a gyroscope, the value of the unbalance can be obtained through a multi-position rolling test, and the purpose of smaller unbalance of the gyroscope can be accurately achieved through adjusting the position, the weight and the like of the adjusting mechanism. This method requires a sufficiently large space to guarantee; secondly, under the condition that the gyroscope is small in size and an adjusting mechanism cannot be added, the unbalance is tested in the debugging process, and then the flywheel component is directly de-duplicated by adopting a laser or mechanical method to achieve the purpose of accurate balance.
The two methods described above have the following limitations:
1) If the size of the miniature flexible gyroscope is too small, the gyroscope flywheel component does not have space to adopt an adjusting mechanism, and the measure cannot be adopted;
2) The surface of the flywheel is de-duplicated after assembly, and the defects of low efficiency, high de-duplication difficulty, poor accuracy, easiness in damaging joints and the like exist.
Advanced component static imbalance removal by micro-flex gyroscopes is a preferred solution to overcome the limitations described above.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a device and a method for detecting the static unbalance of a flywheel component of a flexible gyroscope in the earlier stage.
One of the above objects of the present invention is achieved by the following technical solutions:
the utility model provides a quiet unbalance amount early detection device of flexible top flywheel subassembly which characterized in that: comprises a mounting seat, four magnetic cores, four exciting coils, an elastic nut and a flywheel component;
the mounting seat and the flywheel component are made of soft magnetic alloy; the installation seat adopts a square base provided with a central positioning column and a central hole, and four magnetic conduction core installation holes distributed according to four sides in the long direction are arranged on the periphery of the central positioning column on the installation seat; the outer extending column part of the flexible joint of the flywheel component is penetrated and assembled with the central hole part on the mounting seat from top to bottom and is fixed by a locking nut arranged at the lower end of the outer extending column part; the four magnetic cores are respectively inserted and fixed in the four magnetic core mounting holes in a mode that the upper ends of the four magnetic cores extend out at equal height, and air gaps are arranged between the upper ends of the four magnetic cores and the lower end of the flywheel component; the four excitation coils are respectively wound on the upper extending parts of the four magnetic cores and are sequentially connected in series along the clockwise or anticlockwise direction, after the excitation coils are electrified, the polarities of adjacent magnetic cores are opposite, and the polarities of opposite-angle magnetic cores are the same; the head ends and the tail ends of the four exciting coils are externally connected with a measuring circuit, and two groups of resistors on the measuring circuit are connected with the exciting coils in parallel to form a bridge type measuring circuit. The head ends and the tail ends of the four exciting coils are connected with an alternating current power supply and are alternating current voltage input ends, an output line is led out from the middle connecting point of the four exciting coils, another output line is led out from the middle connecting point of the measuring line, and the two output line ends form a measuring output end;
the installation seat, the four magnetic cores, the bottom of the flywheel component and the air gap thereof form a magnetic circuit of a sensor part of the detection device together, and the four exciting coils are components for generating a magnetic field for the whole detection device.
The second object of the present invention is achieved by the following technical scheme:
the detection method based on the front-stage detection device for the static unbalance of the flexible gyroscope flywheel assembly is characterized by comprising the following steps of:
The flexible joint of the flywheel component is measured before assembly, the specific rigidity is recorded as K1, and the unit is mg.cm/';
Firstly, four magnetic cores are arranged in a mounting seat, four excitation coils are respectively arranged in the four magnetic cores, the four excitation coils are connected in series, the upper end surfaces of the four magnetic cores are checked one by electrifying through a Gaussian meter after the assembly process is finished, and the electromagnetic polarity requirements of opposite angles of the adjacent magnetic cores are met;
then the assembled flexible flywheel component is put into a detection device, and the flexible flywheel component is fastened with the detection device by using an elastic locking nut to complete the assembly of the test assembly;
Calibration of sensor scale factor K using precision turntable 2 Units ofis'/mV;
4.1, placing the test assembly body in a mode that an installation seat faces downwards, marking the initial position of the flexible flywheel assembly, rotating the flexible flywheel device around the central shaft of the flywheel anticlockwise for one circle, and recording angle output values of different positions;
4.2, placing the test assembly body in a mode that an installation seat faces upwards, enabling an initial position to coincide with the initial position in the step 3.1, enabling the flexible flywheel device to rotate clockwise around the center of the driving flywheel for one circle, and recording angle output values of different positions;
4.3 taking the difference between the two measured data, recording the maximum value V of data output MAX ，V MAX And K is equal to 1 And K 2 The product of (2) is a radial unbalance value, which is a moment value, the unit is mg.cm, and the angle position of the maximum radial unbalance can be obtained;
step 6, measuring the axial unbalance moment
6.1, after the radial unbalanced moment is eliminated, fixing the position of the flywheel component relative to the detection device;
6.2, placing the test assembly body in a mode that an installation seat faces downwards, and recording an angle output value V1;
6.3, placing the test assembly body in a mode that the mounting seat is laterally erected, and recording an angle output value V2;
6.4 mixing (V2-V1) with K 1 And K 2 The product of (2) is the axial unbalanced moment, and the difference sign represents the unbalanced position at the outer end or the inner end of the flexible support;
and 7, based on the axial unbalanced moment obtained in the step 6, the end face of the flywheel assembly is an axial moment arm relative to the flexible supporting center, the axial unbalanced mass can be obtained through calculation, and the end face of the flexible flywheel assembly is processed to remove redundant mass, so that the axial balance is realized.
The invention has the advantages and positive effects that:
1. the invention directly tests the unbalance amount of the state of the flexible flywheel assembly part, is used for detecting the state before the assembly of the gyroscope, then carries out precise and efficient weight removal, has no damage to joints, and is an effective measure for improving the quality and the production efficiency of the gyroscope.
2. The invention reduces the drift of the gyroscope caused by unbalance after the whole meter and improves the accuracy of the gyroscope.
3. The invention reduces damage of unbalance to flexible joint after the whole meter is finished, and improves survival rate of gyroscope.
4. The invention improves the production efficiency, can intensively test and process the parts in the initial stage, and meets the requirement of batch production.
Drawings
FIG. 1 is a schematic diagram of the structure of the detection device of the present invention;
FIG. 2 is a schematic diagram of a rotational angle test circuit for a flexible flywheel assembly in accordance with the present invention;
FIG. 3 is a schematic diagram showing the structural change of the flywheel assembly under the action of the radial unbalance of the position 1 of the invention;
FIG. four is a schematic diagram of the structural change of the flywheel assembly under the action of radial unbalance of the position 2;
FIG. 5 is a schematic diagram showing the structural change of the flywheel assembly under the action of the radial unbalance of the position 3 according to the present invention;
FIG. 6 is a diagram of radial unbalance amount measurement data and processing.
Detailed Description
The structure of the present invention will be further described by way of examples with reference to the accompanying drawings. It should be noted that the present embodiments are illustrative and not restrictive.
The invention directly tests the unbalance amount of the state of the flexible flywheel assembly part, is used for detecting the state before the assembly of the gyroscope, carries out precise and efficient weight removal according to the detection structure, has no damage to the joint, and is an effective measure for improving the quality and the production efficiency of the gyroscope.
The invention aims to realize accurate control of unbalance of the flexible flywheel components before batch assembly of the flexible gyroscopes, reduce complex operation in the assembly process and improve production efficiency;
the second purpose of the invention is to eliminate the influence of the unbalanced quantity process on the flexible joint on the flexible flywheel component, avoid the damage of the whole meter to the flexible joint caused by improper stress, and improve the accuracy of the gyroscope.
The front-stage detection device for static unbalance of the flexible gyroscope flywheel assembly is shown in fig. 1a and 1b, and mainly comprises a mounting seat 2, four magnetic cores 4, four excitation coils 3 and an elastic nut 5. The mounting base is used for positioning and mounting the flexible flywheel component at a proper position, and the material is soft magnetic alloy, so that the flexible flywheel component is an important component of a magnetic circuit of a measuring sensor of the detection device. The installation seat adopts a square base provided with a central positioning column and a central hole, four magnetic core installation holes are arranged on the periphery of the central positioning column on the installation seat, and the four magnetic core installation holes are arranged at four corner positions in the long direction by taking the central line of the central positioning column as the center. The four magnetic conducting core materials are soft magnetic alloy and are important components for forming the magnetic circuit of the measuring sensor. The four excitation coils are in a series structure and are excitation elements of the whole measuring magnetic circuit. The elastic lock nut is used for fixing the flexible flywheel assembly on the mounting seat, so that the flexible flywheel assembly is locked and can be rotated. The flexible flywheel assembly 1 is a part to be tested of the invention and comprises a flexible joint 12 and a flywheel assembly 11, wherein the flexible joint 12 is fixed on the flywheel assembly 11 through gluing or welding to form the flexible flywheel assembly 1, which is a core component of a flexible gyroscope.
The installation relation of each part of the detection device is as follows:
the outer cylinder part of the flexible joint of the flexible flywheel component is penetrated and assembled with the central hole part arranged on the mounting seat, and is fixed by being matched with the lower end of the outer cylinder part and the locking nut through threads. The four magnetic cores are respectively inserted and fixed in the four magnetic core mounting holes on the mounting seat in a mode that the upper ends of the four magnetic cores extend out at equal heights, and a proper air gap is arranged between the upper ends of the four magnetic cores and the lower end of the flywheel component. The excitation coils are excitation coils wound by enamelled copper wires, and the four excitation coils are respectively wound on the upper extending parts of the four magnetic cores. The four exciting coils are sequentially connected in series along the clockwise or anticlockwise direction, and after the exciting coils are electrified, the polarities of adjacent magnetic conducting cores are opposite, and the polarities of the diagonal magnetic conducting cores are the same. The four exciting coils are divided into two groups, wherein 31, 32 and 33, 34 are respectively combined with the lower end face of the flywheel component to form an independent inductance sensor, the head ends and the tail ends of the four exciting coils are externally connected with a measuring circuit, two groups of resistors on the measuring circuit are connected with the four exciting coils in series to form a bridge type measuring circuit, the head ends and the tail ends of the four exciting coils are connected with an alternating current power supply, the four exciting coils are alternating current voltage input ends, an output line is led out from the middle connecting points of the two groups of exciting coils, another output line is led out from the middle connecting points of the two groups of resistors of the measuring circuit, and the two output line ends form a measuring output end.
The bridge type measuring circuit is shown in fig. 2, wherein L1 and R1 respectively represent the inductance and the resistance after the series connection of the exciting coils 31 and 32 in fig. 1b, L2 and R2 respectively represent the inductance and the resistance after the series connection of the exciting coils 33 and 34 in fig. 1b, R3 and R4 are the measuring circuit constitution resistance,
for inputting AC voltage>
For measuring output.
The front-stage detection method for the static unbalance of the flexible gyroscope flywheel assembly is based on the front-stage detection device for the static unbalance of the flexible gyroscope flywheel assembly and comprises the following steps:
The flexible joint of the flywheel component is measured before assembly, the specific rigidity is recorded as K1, and the unit is mg.cm/'; the measurement process can be carried out by applying a suitable moment M to the joint assembly to measure the angle theta of rotation of the flexible joint about its support, the ratio of M to theta being K1.
Firstly, four magnetic cores are arranged in an installation seat, four excitation coils are respectively arranged in the four magnetic cores, the four excitation coils are connected in series, the upper end surfaces of the four magnetic cores are inspected one by electrifying through a Gaussian meter after the assembly process is finished, and the electromagnetic polarity requirement shown in the figure 1b is met;
the assembled flexible flywheel assembly is then loaded into the inspection device and the flexible flywheel assembly 1 is secured to the inspection device using the resilient locking nut 5.
Calibrating the relation between the rotation angle and the output voltage of the assembled sensor by using a precise turntable, namely a sensor scale coefficient K2 (unit is'/mV); the specific calibration process is that the base is fixedly connected with the turntable, a flywheel component is fixed by using a reasonable clamping fixture, and a measuring line is connected. Rotating the turntable to a proper angle, outputting a voltage value by the measuring circuit, increasing the turntable angle by proper increment, repeating the measurement of at least 7 groups of data of the angle and the voltage value, fitting the test data, and obtaining the slope of the two to be the sensor scale coefficient K 2 。
Because the detection device is not changed in the use process after being assembled, and the flexible flywheel components are precise components, the scale difference of the assembled body sensor assembled by different flexible flywheel components is small. Usually only the first applied assembly sensor is calibrated, and this value will be used later without special circumstances. This step may be omitted during actual operation.
4.1 placing the test assembly according to the position shown in fig. 3, connecting a test circuit, marking the initial position of the flexible flywheel assembly, rotating the flexible flywheel device counterclockwise around the flywheel central shaft for one circle (the moment applied by the flywheel assembly can rotate around the thin neck of the flexible joint 12. The rotation angle is tested by the circuit shown in fig. 2, and the rotation direction can be determined by an oscilloscope), and recording the angle output values of different positions;
4.2, placing the test assembly body according to the position of the figure 4, enabling the initial position to coincide with the initial position of the figure 3, enabling the flexible flywheel device to rotate clockwise around the center of the driving flywheel for one circle, and recording angle output values of different positions;
4.3 taking the difference between the two measured data, recording the maximum value V of data output MAX ，V MAX And K is equal to 1 And K 2 The product of (2) is the radial unbalance value, which is the moment value, the unit is mg.cm, and the angle position of the maximum radial unbalance can be obtained. The recorded raw data and the processed effects are shown in fig. 6.
And 5, determining the outer diameter of the flywheel assembly based on the moment value obtained in the step 4 and the corresponding angle position, namely fixing the moment arm, and calculating to obtain the removal amount of the corresponding angle position. And machining and removing the corresponding position of the outer side surface of the flexible flywheel component according to the removal amount to realize radial balance.
And 6, measuring the axial unbalance moment.
6.1, after the radial unbalanced moment is eliminated, fixing the flywheel component relative to the detection device and enabling the flywheel component and the detection device not to rotate relatively;
6.2, placing the test assembly according to the position of FIG. 3, standing still, and recording an angle output value V1;
6.3, placing the test assembly according to the position of FIG. 5, standing still, and recording an angle output value V2;
6.4 mixing (V2-V1) with K 1 And K 2 The product of (2) is the axial unbalanced moment, and the difference sign represents the unbalanced position at the outer end or the inner end of the flexible support;
and 7, based on the axial unbalanced moment obtained in the step 6, the end face of the flywheel assembly is an axial moment arm relative to the flexible supporting center and is a fixed value, the axial unbalanced mass can be obtained through calculation, and the end face of the flexible flywheel assembly is processed to remove redundant mass, so that the axial balance is realized.
Although the embodiments of the present invention and the accompanying drawings have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit of the invention and the appended claims, and therefore the scope of the invention is not limited to the embodiments and the disclosure of the drawings.
Claims (2)
1. The utility model provides a quiet unbalance amount early detection device of flexible top flywheel subassembly which characterized in that: comprises a mounting seat, four magnetic cores, four exciting coils, an elastic nut and a flywheel component;
the mounting seat and the magnetic core are made of the same soft magnetic alloy; the installation seat adopts a square base provided with a central positioning column and a central hole, and four magnetic conduction core installation holes distributed according to four corners in the long direction are arranged on the periphery of the central positioning column on the installation seat; the outer extending column part of the flexible joint of the flywheel component is penetrated and assembled with the central hole part on the mounting seat from top to bottom and is fixed by a locking nut arranged at the lower end of the outer extending column part; the four magnetic cores are respectively inserted and fixed in the four magnetic core mounting holes in a mode that the upper ends of the four magnetic cores extend out at equal height, and air gaps are arranged between the upper ends of the four magnetic cores and the lower end of the flywheel component; the four excitation coils are respectively wound on the upper extending parts of the four magnetic cores and are sequentially connected in series along the clockwise or anticlockwise direction, after the excitation coils are electrified, the polarities of adjacent magnetic cores are opposite, and the polarities of opposite-angle magnetic cores are the same; the head ends and the tail ends of the four exciting coils are externally connected with a measuring circuit, and two groups of resistors on the measuring circuit are connected with the exciting coils in parallel to form a bridge type measuring circuit; the head ends and the tail ends of the four exciting coils are connected with an alternating current power supply and are alternating current voltage input ends, an output line is led out from the middle connecting point of the four exciting coils, another output line is led out from the middle connecting point of the measuring line, and the two output line ends form a measuring output end;
the installation seat, the four magnetic cores, the bottom of the flywheel component and the air gap thereof form a magnetic circuit of a sensor part of the detection device together, and the four exciting coils are components for generating a magnetic field for the whole detection device.
2. A method for detecting the static unbalance amount early-stage detection device based on the flexible gyroscope flywheel assembly as claimed in claim 1, which is characterized by comprising the following steps:
step 1, completing the specific rigidity measurement of the flexible joint of the flywheel assembly
The flexible joint of the flywheel component is measured before assembly, the specific rigidity is recorded as K1, and the unit is mg.cm/';
step 2, assembling the unbalance amount early detection device
Firstly, four magnetic cores are arranged in a mounting seat, four excitation coils are respectively arranged in the four magnetic cores, the four excitation coils are connected in series, the upper end surfaces of the four magnetic cores are checked one by electrifying through a Gaussian meter after the assembly process is finished, and the electromagnetic polarity requirements of opposite angles of the adjacent magnetic cores are met;
then the assembled flexible flywheel component is put into a detection device, and the flexible flywheel component is fastened with the detection device by using an elastic locking nut to complete the assembly of the test assembly;
step 3, finishing the measurement of the sensor scale coefficient
Calibrating a sensor scale coefficient K2 by using a precise turntable, wherein the unit is'/mV;
step 4, measuring radial unbalanced moment
4.1, placing the test assembly body in a mode that an installation seat faces downwards, marking the initial position of the flexible flywheel assembly, rotating the flexible flywheel device around the central shaft of the flywheel anticlockwise for one circle, and recording angle output values of different positions;
4.2, placing the test assembly body in a mode that an installation seat faces upwards, enabling an initial position to coincide with the initial position in the step 4.1, enabling the flexible flywheel device to rotate clockwise around the center of the driving flywheel for one circle, and recording angle output values of different positions;
4.3 taking the difference between the two measured data, recording the maximum value V of data output MAX ，V MAX And K is equal to 1 And K 2 The product of (2) is a radial unbalance value, which is a moment value, the unit is mg.cm, and the angle position of the maximum radial unbalance can be obtained;
step 5, calculating the removal amount of the corresponding angle position based on the moment value and the corresponding angle position obtained in the step 4, and processing and removing the corresponding position of the outer side surface of the flexible flywheel assembly according to the removal amount to realize radial balance;
step 6, measuring the axial unbalance moment
6.1, after the radial unbalanced moment is eliminated, fixing the position of the flywheel component relative to the detection device;
6.2, placing the test assembly body in a mode that an installation seat faces downwards, and recording an angle output value V1;
6.3, placing the test assembly body in a mode that the mounting seat is laterally erected, and recording an angle output value V2;
6.4 mixing (V2-V1) with K 1 And K 2 The product of (2) is the axial unbalanced moment, and the difference sign represents the unbalanced position at the outer end or the inner end of the flexible support;
and 7, based on the axial unbalanced moment obtained in the step 6, the end face of the flywheel assembly is an axial moment arm relative to the flexible supporting center, the axial unbalanced mass can be obtained through calculation, and the end face of the flexible flywheel assembly is processed to remove redundant mass, so that the axial balance is realized.
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| CN202211555390.XA CN116296072A (en) | 2022-12-06 | 2022-12-06 | Early detection device and detection method for static unbalance of flexible gyroscope flywheel assembly |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119389754A (en) * | 2025-01-02 | 2025-02-07 | 成都金之川电子有限公司 | Magnetic core feeding device and method for automatic assembly operation of integrated inductor |
| CN119389754B (en) * | 2025-01-02 | 2025-04-04 | 成都金之川电子有限公司 | A magnetic core feeding device and method for automatic assembly of integrated inductors |
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2022
- 2022-12-06 CN CN202211555390.XA patent/CN116296072A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119389754A (en) * | 2025-01-02 | 2025-02-07 | 成都金之川电子有限公司 | Magnetic core feeding device and method for automatic assembly operation of integrated inductor |
| CN119389754B (en) * | 2025-01-02 | 2025-04-04 | 成都金之川电子有限公司 | A magnetic core feeding device and method for automatic assembly of integrated inductors |
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