CN108418315B - Device and method for non-contact type rotary ultrasonic machining energy transmission and feedback signal acquisition - Google Patents
Device and method for non-contact type rotary ultrasonic machining energy transmission and feedback signal acquisition Download PDFInfo
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- CN108418315B CN108418315B CN201810186043.1A CN201810186043A CN108418315B CN 108418315 B CN108418315 B CN 108418315B CN 201810186043 A CN201810186043 A CN 201810186043A CN 108418315 B CN108418315 B CN 108418315B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/15—Circuit arrangements or systems for wireless supply or distribution of electric power using ultrasonic waves
Abstract
The invention discloses a device and a method for non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition, wherein the device comprises a fixed end and a rotary end, and the rotary end comprises a rotary end magnetic core and a rotary end coil; the fixed end comprises an ultrasonic energy transmission unit and an ultrasonic feedback signal acquisition unit; the ultrasonic energy transmission unit comprises an ultrasonic energy transmission unit magnetic circuit and an ultrasonic energy transmission unit coil; the ultrasonic feedback signal acquisition unit comprises an ultrasonic feedback signal acquisition unit magnetic circuit and an ultrasonic feedback signal acquisition unit coil. The ultrasonic energy transmission signal and the ultrasonic feedback signal are separated, the rotating end electric signal is collected, and the resonance tracking in the resonance state and the quick response detuning state in the ultrasonic processing process can be fed back and adjusted in real time.
Description
Technical Field
The invention belongs to the technical field of rotary ultrasonic machining, and particularly relates to a non-contact ultrasonic rotary machining energy transmission and feedback signal acquisition device and method.
Background
The rotary ultrasonic processing technology is a processing method which realizes material removal by compounding rotary motion on the basis of the traditional free abrasive ultrasonic processing technology. The rotary ultrasonic processing can effectively reduce cutting force, improve material removal rate and reduce cutter abrasion in the processing process of hard and brittle materials such as glass, ceramics and the like, and particularly has good processing effect on difficult-to-process materials.
The rotary ultrasonic processing method mainly comprises the following steps: rotary ultrasonic milling, rotary ultrasonic grinding, rotary ultrasonic drilling and the like. These methods of machining are all accomplished without the need for a rotating ultrasonic machining system. A complete rotary ultrasonic machining system is generally comprised of an ultrasonic power source, an ultrasonic energy transmission device, and a rotary ultrasonic tool shank. The ultrasonic power supply comprises a signal generating module and a feedback signal processing module. The rotary ultrasonic knife handle comprises a standard taper handle part, an energy converter, a variable amplitude rod and a processing cutter. In the processing process, the main shaft of the random machine tool of the rotary ultrasonic knife handle rotates at a high speed, and the ultrasonic energy transmission device transmits the ultrasonic energy generated by the ultrasonic power supply to the rotary ultrasonic knife handle. The energy converter in the rotary ultrasonic knife handle receives ultrasonic energy and converts the ultrasonic energy into high-frequency vibration, and the amplification effect of the amplitude transformer drives the cutter to realize rotary ultrasonic processing.
Ultrasonic energy transmission and resonance state detection are the core of rotary ultrasonic processing systems. In order to obtain good processing quality during processing, the system needs to reliably detect the feedback signal and track the resonance state in real time. In the ultrasonic auxiliary machining process, the abrasion of a machining cutter, the machining load and the change of the system temperature all affect the vibration state of the vibration system, so that the vibration system deviates from a resonance point; the performance of the vibration system cannot be exerted in the detuning state, and further the processing quality of the workpiece and the service life of the cutter are seriously influenced. Therefore, a real-time and reliable ultrasonic machining energy transmission and feedback signal acquisition device and method are needed, the resonance working state of the vibration system is detected and adjusted, and the machining quality is favorably improved; meanwhile, abnormal conditions such as overlarge force, cutter damage and the like can be detected by the detection system in the machining process, so that the machining stability and reliability are ensured.
Traditional ultrasonic energy transmission mainly adopts the mode that carbon brush and conductive slip ring contact to carry out electric energy transmission, owing to adopt the electrically conductive mode of contact, do not have middle electric energy transmission link, this kind of electric energy transmission method is at the course of the work, and the supersound power can directly be in real time to feedback signal in the circuit handle and the tracking of resonance state, but contact ultrasonic energy transmission mode, in the rotatory supersound course of working, the supersound handle of a knife is high-speed rotatory, produces striking sparks and carbon deposit phenomenon easily, carbon brush wearing and tearing are serious and life is short, and the security is low.
In order to realize reliable transmission of ultrasonic energy to an ultrasonic knife handle in a high-speed rotating machining state and avoid carbon deposition, ignition and other phenomena caused by contact type transmission, a non-contact type ultrasonic energy transmission method is often adopted in the technical field of rotating ultrasonic machining for electric energy transmission. The non-contact electric energy transmission mode widens the application range of the rotary ultrasonic processing.
The non-contact ultrasonic energy transmission method is divided into semi-ring non-contact ultrasonic energy transmission and full-ring non-contact ultrasonic energy transmission according to the limitation and the requirement of the installation size of an ultrasonic machining system, and the semi-ring non-contact ultrasonic energy transmission and the full-ring non-contact ultrasonic energy transmission are respectively suitable for a machine tool with an automatic tool changing function and a machine tool without the automatic tool changing function in order to avoid the interference of the position of a tool changing manipulator of.
In the prior art, no matter half-ring or full-ring non-contact type ultrasonic energy transmission is adopted, although the safety and reliability problems of traditional contact type electric energy transmission can be solved, due to the addition of the non-contact electric energy transmission unit, the resonance state of the ultrasonic vibration system can not be directly and reliably detected, and the resonance state of the ultrasonic vibration system can only be judged by detecting the change of an ultrasonic electric energy transmission signal, and the detection method is simple passive detection: because the energy transmission signal is used for ultrasonic energy transmission and also used for feedback signal detection of the vibration system, the energy transmission signal and the feedback detection signal are often interfered with each other, the stability of the system is not high, the feedback signal of the vibration system cannot truly reflect a resonance state, and the tracking of the resonance state is slow.
In addition, the prior art also adopts a method for measuring other physical quantities to detect the resonance state of the vibration system. Patent CN206643191U "rotary ultrasonic composite progressive forming device based on real-time feedback" proposes a method for detecting a strain gauge adhered on an amplitude transformer as a force sensor: the strain gauge is connected with the signal acquisition and emission module, and the resonance state is detected by the method that the signal acquisition and emission module is connected with the information processing and displaying device. CN204912007U ultrasonic transducer with quantitative amplitude feedback system proposes a method for embedding an amplitude detector on a transducer, where the amplitude detector includes a voltage generating sheet, a sorting circuit, an acceleration sensor, a storage circuit and a wireless transmitting circuit, which are connected in sequence by a lead, and the acceleration sensor is used to measure amplitude and wirelessly transmit amplitude and frequency signals. In the two methods, the resonance state is detected by adopting an independent detection system, but the whole size of the vibration system is increased, the development cost is increased, and meanwhile, the introduction of a detection device and the uncertainty caused by the conversion between different physical quantities cannot realize accurate signal detection in the actual processing process.
Aiming at the problems in the rotary ultrasonic machining process, a device and a method for non-contact ultrasonic rotary machining energy transmission and feedback signal acquisition are provided, two groups of coils are designed at a fixed end, the electromagnetic induction principle is adopted, one group is used for energy transmission of a vibration system, and the other group is used for signal feedback so as to realize detection of a resonance state. The non-contact electric energy transmission mode is adopted, the defect that the carbon brush and the conductive slip ring are in contact conductive transmission is overcome, and the safety and the service life of the system are high; secondly, an energy transmission signal is separated from a feedback detection signal, and electric energy output by the ultrasonic power supply is completely used for energy transmission and is not interfered by the feedback detection signal, so that the power and the stability of energy transmission are improved; the feedback detection signal and the energy transmission signal are independent and do not interfere with each other, so that the signals of the vibration system can be accurately acquired, the working state of the vibration system is reflected, and the real-time feedback of the resonance state and the resonance tracking under the quick response detuning state in the ultrasonic processing process are realized.
Disclosure of Invention
In order to solve the problems in the prior art, the invention designs a device and a method for non-contact type rotary ultrasonic machining energy transmission and feedback signal acquisition, which have the advantages of high reliability, high energy transmission efficiency, small feedback signal interference and rapid resonance state tracking speed. The technical means adopted by the invention are as follows:
a device for non-contact type rotary ultrasonic machining energy transmission and feedback signal acquisition comprises a fixed end and a rotary end, wherein the fixed end and the rotary end are coaxially arranged, and the fixed end is positioned above the rotary end;
the rotating end comprises a rotating end magnetic core and an annular rotating end coil, the rotating end magnetic core is a pot-shaped magnetic core, the upper end of the rotating end magnetic core is open, the rotating end magnetic core comprises a rotating end magnetic core bottom surface, and a rotating end magnetic core inner wall and a rotating end magnetic core outer wall which are positioned on the rotating end magnetic core bottom surface and are coaxial, and an annular groove between the rotating end magnetic core inner wall and the rotating end magnetic core outer wall is provided with the annular rotating end coil;
the fixed end comprises an ultrasonic energy transmission unit and an ultrasonic feedback signal acquisition unit;
the ultrasonic energy transmission unit comprises an ultrasonic energy transmission unit magnetic circuit and an ultrasonic energy transmission unit coil;
the ultrasonic feedback signal acquisition unit comprises an ultrasonic feedback signal acquisition unit magnetic circuit and an ultrasonic feedback signal acquisition unit coil;
the magnetic cores forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are common pot-shaped magnetic cores or common partial arc-shaped magnetic cores obtained by cutting from the pot-shaped magnetic cores or the pot-shaped magnetic cores and partial arc-shaped magnetic cores on the pot-shaped magnetic cores respectively;
the magnetic cores forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are common pot-shaped magnetic cores, and the inner wall and the outer wall of the pot-shaped magnetic cores are two coaxial cylindrical surfaces.
The magnetic cores forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are common partial arc-shaped magnetic cores obtained by intercepting from the tank-shaped magnetic core or partial arc-shaped magnetic cores obtained by intercepting from the tank-shaped magnetic core respectively, the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are suitable for processing occasions requiring automatic tool changing, and the cylindrical surfaces of the inner wall and the outer wall of the ultrasonic energy transmission unit are coaxial.
The magnetic cores forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are respectively a tank-shaped magnetic core and a part of arc-shaped magnetic cores on the tank-shaped magnetic core, namely, two grooves for the coils to bypass are formed in the outer wall of a complete tank-shaped magnetic core to form the arc-shaped magnetic core, and the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are suitable for processing occasions with manual tool changing.
The magnetic core and the coil of the ultrasonic energy transmission unit and the coil of the ultrasonic feedback signal acquisition unit form a transmission end and a feedback end.
The transmission end is used for transmitting the output of the ultrasonic power supply to the rotating end;
the feedback end is used for feeding back and detecting the electric signal of the rotating end so as to facilitate the tracking of the resonance state.
The ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil are annular coils wound in annular grooves of a pot-shaped magnetic core (a pot-shaped magnetic core which is a common magnetic core of the magnetic cores forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit or a pot-shaped magnetic core in the pot-shaped magnetic core and a part of arc-shaped magnetic cores on the pot-shaped magnetic core respectively) or waist-shaped coils wound on the outer wall of the magnetic core of the pot-shaped magnetic core through the inner grooves of the arc-shaped magnetic core;
the lower ends of magnetic cores forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are open;
the magnetic cores forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are coaxially and axially arranged with the magnetic core at the rotating end, and the axial gap between the end surfaces of the magnetic cores of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit is larger than 0 and smaller than or equal to 2 mm;
an electromagnetic isolation plate for reducing mutual interference between signals is arranged between the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil.
The electromagnetic isolation plate can be made of aluminum materials or other electromagnetic isolation materials, so that the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil do not interfere with each other in the process of respectively transmitting signal energy and acquiring ultrasonic feedback signals.
Magnetic cores forming the fixed end to form a magnetic circuit of the ultrasonic energy transmission unit and a magnetic circuit of the ultrasonic feedback signal acquisition unit are respectively partial arc-shaped magnetic cores obtained by cutting from a pot-shaped magnetic core, the two arc-shaped magnetic cores are coaxially and horizontally arranged in the circumferential direction, and the sum of central angles of the two arc-shaped magnetic cores is less than or equal to 360 degrees;
the turns of the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil which are respectively positioned in the two arc-shaped magnetic cores are the same;
if the sum of central angles of the two arc-shaped magnetic cores is equal to 360 degrees, the two arc-shaped magnetic cores are oppositely arranged, the electromagnetic isolation plate is arranged between the opposite end surfaces of the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil in the two arc-shaped magnetic cores respectively, and the gap between the electromagnetic isolation plate and the electromagnetic isolation plate is larger than 1 mm;
if the sum of central angles of the two arc-shaped magnetic cores is smaller than 360 degrees, the two arc-shaped magnetic cores are adjacently arranged, the electromagnetic isolation plate is arranged between the adjacent end surfaces of the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil which are respectively positioned in the two arc-shaped magnetic cores, and the gap between the electromagnetic isolation plate and the electromagnetic isolation plate is larger than 1 mm.
When the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil are circumferentially arranged, the electromagnetic induction principle of electromagnetic coupling is utilized, the ultrasonic energy transmission unit coil and the magnetic core corresponding to the ultrasonic energy transmission unit coil form a transmission end for transmitting the energy of an ultrasonic power supply to the rotating end for ultrasonic processing, and the ultrasonic feedback signal acquisition unit coil and the magnetic core corresponding to the ultrasonic energy transmission unit coil form a transmission end for detecting the feedback signal of the rotating end and transmitting the feedback signal to the ultrasonic power supply for real-time monitoring of the resonance state and tracking of the resonance state.
The magnetic cores forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit formed by the fixed end are common pot-shaped magnetic cores or common part of arc-shaped pot-shaped magnetic cores obtained by cutting from the pot-shaped magnetic cores; the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil are axially arranged and have the same number of turns;
the electromagnetic isolation plate is arranged between the end faces of the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil, and the gap between the electromagnetic isolation plate and the electromagnetic isolation plate is larger than 1 mm.
The magnetic cores forming the fixed end to form the magnetic circuit of the ultrasonic energy transmission unit and the magnetic circuit of the ultrasonic feedback signal acquisition unit are respectively a tank-shaped magnetic core and a part of arc-shaped magnetic cores on the tank-shaped magnetic core, the coil of the ultrasonic energy transmission unit and the coil of the ultrasonic feedback signal acquisition unit are axially arranged, one magnetic core is positioned at the bottom of the annular groove of the tank-shaped magnetic core, the other magnetic core is wound on the outer wall of the magnetic core through the inner groove of the arc-shaped magnetic core, and the turns of the coil of the ultrasonic energy transmission unit and the coil of the ultrasonic feedback signal acquisition unit are;
the electromagnetic isolation plate is arranged between the end faces of the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil, and the gap between the electromagnetic isolation plate and the electromagnetic isolation plate is larger than 1 mm.
When the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil are axially arranged, the electromagnetic induction principle of electromagnetic coupling is utilized, the ultrasonic energy transmission unit coil and the magnetic core corresponding to the ultrasonic energy transmission unit coil form a transmission end for transmitting the energy of an ultrasonic power supply to the rotating end for ultrasonic processing, and the ultrasonic feedback signal acquisition unit coil and the magnetic core corresponding to the ultrasonic feedback signal acquisition unit coil form a transmission end for detecting the feedback signal of the rotating end and transmitting the feedback signal to the ultrasonic power supply for real-time monitoring of the resonance state and tracking of the resonance state.
The ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil are axially arranged and are suitable for occasions where the axial ring groove is not limited.
The outer side of the bottom surface of the rotating end magnetic core, the inner wall of the rotating end magnetic core and the outer wall of the rotating end magnetic core is provided with a rotating end magnetic core outer sleeve.
The outer walls of the magnetic cores forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are provided with fixed end magnetic core jackets.
The invention also discloses a method for carrying out non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition according to the non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition device, which comprises the following steps:
the ultrasonic power supply is electrified and initialized, the frequency and power output are inverted into high-frequency alternating current through an inversion module, and the energy is transmitted to the annular rotating end coil through the ultrasonic energy transmission unit, so that the vibration system is excited to carry out high-frequency ultrasonic vibration processing;
the ultrasonic feedback signal acquisition unit is isolated from the ultrasonic energy transmission unit in signal mode and acquires electric signals (signals such as current or voltage) of the vibration system; the ultrasonic energy transmission and feedback signal acquisition structures are different, the electrical properties of the ultrasonic energy transmission and feedback signal acquisition structures are also different, in order to conveniently extract and process signals with different sizes and accurately and effectively perform frequency tracking, the effective sectional area ratio of the rotating end magnetic core to the fixed end feedback signal acquisition unit magnetic core is made to be n, the feedback signals are amplified by n times, the amplified signals are transmitted to the signal filtering module to be processed, the processed signals are finally sent to the ultrasonic power supply MCU to be subjected to response processing, and then the frequency output of the ultrasonic power supply is adjusted to perform real-time tracking of a resonance state.
When the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil are circumferentially arranged, the transmission end and the feedback end are respectively provided with a magnetic core (the sum of central angles of the two arc-shaped magnetic cores is less than or equal to 360 degrees), when the sectional area of the ultrasonic feedback signal acquisition unit coil is limited, the ultrasonic feedback signal acquired by the ultrasonic feedback signal acquisition unit coil is weaker and cannot be directly adopted, in order to conveniently extract and process signals with different sizes and accurately and effectively track the frequency, a signal multiple amplification method is adopted according to different structures of ultrasonic energy transmission and feedback signal acquisition, the effective sectional area ratio of the rotating end magnetic core and the fixed end feedback signal acquisition unit magnetic core is n, the feedback signal is amplified by n times, and then the amplified signal is transmitted to a signal filtering module for signal processing, finally, the processed signals are sent to an ultrasonic power supply MCU for response processing, and then the frequency output of the ultrasonic power supply is adjusted for real-time tracking of the resonance state;
when the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil are axially arranged, the transmission end and the feedback end share one magnetic core (the central angle is less than 360 degrees), the effective sectional area ratio of the magnetic core of the rotating end to the magnetic core of the fixed end feedback signal acquisition unit is n, the feedback signal is amplified by n times and transmitted to a signal filtering module in the ultrasonic power supply for further filtering, and finally the signal is sent to an ultrasonic power supply MCU for response processing, so that the frequency output of the ultrasonic power supply is adjusted for real-time tracking of a resonance state.
Compared with the prior art, the ultrasonic energy transmission system has the advantages that the energy transmission and feedback detection signal acquisition are carried out in a non-contact mode, the safety and the service life of the system are improved, other detection devices such as a strain gauge, a displacement sensor and the like are not added, the size of the ultrasonic knife handle is reduced, the energy transmission signal and the ultrasonic feedback acquisition signal are separated, the rotating end electric signal is acquired, the power and the stability of energy transmission can be improved, and the resonance tracking in a resonance state and a quick response detuning state in the ultrasonic machining process can be fed back in real time.
Based on the reasons, the invention can be widely popularized in the fields of rotary ultrasonic processing technology and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is an assembly schematic diagram of a device for non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition, a rotary ultrasonic tool shank and an ultrasonic machining tool in embodiment 1 of the present invention.
Fig. 2 is a cross-sectional view of a device for non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition in embodiment 1 of the present invention.
Fig. 3 is an assembly schematic diagram of the device for non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition, the rotary ultrasonic tool shank and the ultrasonic machining tool in embodiment 2 of the present invention.
Fig. 4 is a schematic diagram of an apparatus for non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition in embodiment 2 of the present invention.
Fig. 5 is an assembly schematic diagram of the device for non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition, the rotary ultrasonic tool shank and the ultrasonic machining tool in embodiment 3 of the present invention.
Fig. 6 is a schematic diagram of an apparatus for non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition in embodiment 3 of the present invention.
Fig. 7 is an assembly schematic diagram of the device for non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition, the rotary ultrasonic tool shank and the ultrasonic machining tool in embodiment 4 of the invention.
Fig. 8 is a schematic diagram of an apparatus for non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition in embodiment 4 of the present invention.
Fig. 9 is a schematic diagram of an apparatus for non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition in embodiment 5 of the present invention.
Fig. 10 is a cross-sectional view of a device for non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition in embodiment 5 of the present invention.
Fig. 11 is a flowchart of a method for non-contact rotational ultrasonic machining energy transmission and feedback signal acquisition in embodiment 6 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1 and fig. 2, a non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition device includes a fixed end and a rotary end, where the fixed end and the rotary end are coaxially disposed, and the fixed end is located above the rotary end;
the rotating end comprises a rotating end magnetic core 1 and an annular rotating end coil 2, the rotating end magnetic core 1 is a pot-shaped magnetic core, the upper end of the rotating end magnetic core is open, the rotating end magnetic core comprises a rotating end magnetic core bottom surface, and a rotating end magnetic core inner wall and a rotating end magnetic core outer wall which are coaxial and are positioned on the rotating end magnetic core bottom surface, and an annular groove between the rotating end magnetic core inner wall and the rotating end magnetic core outer wall is provided with the annular rotating end coil 2;
the fixed end comprises an ultrasonic energy transmission unit and an ultrasonic feedback signal acquisition unit;
the ultrasonic energy transmission unit comprises an ultrasonic energy transmission unit magnetic circuit and an ultrasonic energy transmission unit coil 3;
the ultrasonic feedback signal acquisition unit comprises an ultrasonic feedback signal acquisition unit magnetic circuit and an ultrasonic feedback signal acquisition unit coil 4;
the magnetic cores 5 forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are common pot-shaped magnetic cores; the ultrasonic energy transmission unit coil 3 and the ultrasonic feedback signal acquisition unit coil 4 are annular coils wound in the tank-shaped magnetic core ring groove; the lower ends of magnetic cores 5 forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are open; the magnetic cores 5 forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are coaxially and axially arranged with the rotating end magnetic core 1, and the axial gap between the end surfaces of the magnetic cores of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit is larger than 0 and smaller than or equal to 2 mm;
the ultrasonic energy transmission unit coil 3 and the ultrasonic feedback signal acquisition unit coil 4 are axially arranged and have the same number of turns;
an electromagnetic isolation plate 6 is arranged between the end faces of the ultrasonic energy transmission unit coil 3 adjacent to the ultrasonic feedback signal acquisition unit coil 4, and the gap between the electromagnetic isolation plate 6 and the electromagnetic isolation plate 6 is larger than 1 mm.
A rotary end magnetic core outer sleeve 7 is arranged on the bottom surface of the rotary end magnetic core, the inner wall of the rotary end magnetic core and the outer side of the outer wall of the rotary end magnetic core;
the outer walls of the magnetic cores 5 forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are provided with fixed end magnetic core jackets 8.
Example 2
As shown in fig. 3 and 4, a non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition device includes a fixed end and a rotary end, the fixed end and the rotary end are coaxially disposed, and the fixed end is located above the rotary end;
the rotating end comprises a rotating end magnetic core 1 and an annular rotating end coil 2, the rotating end magnetic core 1 is a pot-shaped magnetic core, the upper end of the rotating end magnetic core is open, the rotating end magnetic core comprises a rotating end magnetic core bottom surface, and a rotating end magnetic core inner wall and a rotating end magnetic core outer wall which are coaxial and are positioned on the rotating end magnetic core bottom surface, and an annular groove between the rotating end magnetic core inner wall and the rotating end magnetic core outer wall is provided with the annular rotating end coil 2;
the fixed end comprises an ultrasonic energy transmission unit and an ultrasonic feedback signal acquisition unit;
the ultrasonic energy transmission unit comprises an ultrasonic energy transmission unit magnetic circuit and an ultrasonic energy transmission unit coil 3;
the ultrasonic feedback signal acquisition unit comprises an ultrasonic feedback signal acquisition unit magnetic circuit and an ultrasonic feedback signal acquisition unit coil 4;
the magnetic cores 5 forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are shared partial arc-shaped magnetic cores obtained by cutting from the pot-shaped magnetic cores; the central angle of the arc-shaped magnetic core is less than 360 degrees, the ultrasonic energy transmission unit coil 3 and the ultrasonic feedback signal acquisition unit coil 4 are waist-shaped coils wound on the outer wall of the magnetic core through the inner groove of the arc-shaped magnetic core; the lower ends of magnetic cores 5 forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are open; the magnetic cores 5 forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are coaxially and axially arranged with the rotating end magnetic core 1, and the axial gap between the end surfaces of the magnetic cores of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit is larger than 0 and smaller than or equal to 2 mm;
the ultrasonic energy transmission unit coil 3 and the ultrasonic feedback signal acquisition unit coil 4 are axially arranged and have the same number of turns;
an electromagnetic isolation plate 6 is arranged between the end faces of the ultrasonic energy transmission unit coil 3 adjacent to the ultrasonic feedback signal acquisition unit coil 4, and the gap between the electromagnetic isolation plate 6 and the electromagnetic isolation plate 6 is larger than 1 mm.
A rotary end magnetic core outer sleeve 7 is arranged on the bottom surface of the rotary end magnetic core, the inner wall of the rotary end magnetic core and the outer side of the outer wall of the rotary end magnetic core;
the outer walls of the magnetic cores 5 forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are provided with fixed end magnetic core jackets 8.
Example 3
As shown in fig. 5 and 6, a device for non-contact rotary ultrasonic processing energy transmission and feedback signal acquisition comprises a fixed end and a rotary end, wherein the fixed end and the rotary end are coaxially arranged, and the fixed end is positioned above the rotary end.
The rotating end comprises a rotating end magnetic core 1 and an annular rotating end coil 2, the rotating end magnetic core 1 is a pot-shaped magnetic core, the upper end of the rotating end magnetic core is open, the rotating end magnetic core comprises a rotating end magnetic core bottom surface, and a rotating end magnetic core inner wall and a rotating end magnetic core outer wall which are coaxial and are positioned on the rotating end magnetic core bottom surface, and an annular groove between the rotating end magnetic core inner wall and the rotating end magnetic core outer wall is provided with the annular rotating end coil 2;
the fixed end comprises an ultrasonic energy transmission unit and an ultrasonic feedback signal acquisition unit;
the ultrasonic energy transmission unit comprises an ultrasonic energy transmission unit magnetic circuit and an ultrasonic energy transmission unit coil 3;
the ultrasonic feedback signal acquisition unit comprises an ultrasonic feedback signal acquisition unit magnetic circuit and an ultrasonic feedback signal acquisition unit coil 4;
the magnetic cores 5 forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are respectively partial arc-shaped magnetic cores obtained by cutting from a pot-shaped magnetic core; the sum of central angles of the two arc-shaped magnetic cores is equal to 360 degrees, the two arc-shaped magnetic cores are coaxially and horizontally arranged in a circumferential direction, the ultrasonic energy transmission unit coil 3 and the ultrasonic feedback signal acquisition unit coil 4 are waist-shaped coils wound on the outer wall of the magnetic cores through inner grooves of the arc-shaped magnetic cores, the number of turns of the ultrasonic energy transmission unit coil 3 is the same as that of the ultrasonic feedback signal acquisition unit coil 4, an electromagnetic isolation plate 6 is arranged between the opposite end faces of the ultrasonic energy transmission unit coil 3 and the ultrasonic feedback signal acquisition unit coil 4, and the gap between the electromagnetic isolation plate 6 and the electromagnetic isolation plate 6 is larger than 1 mm;
the lower ends of magnetic cores 5 forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are open; the magnetic cores 5 forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are coaxially and axially arranged with the rotating end magnetic core 1, and the axial gap between the end surfaces of the magnetic cores of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit is larger than 0 and smaller than or equal to 2 mm;
a rotary end magnetic core outer sleeve 7 is arranged on the bottom surface of the rotary end magnetic core, the inner wall of the rotary end magnetic core and the outer side of the outer wall of the rotary end magnetic core;
the outer walls of the magnetic cores 5 forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are provided with fixed end magnetic core jackets 8.
Example 4
As shown in fig. 7 and 8, a device for non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition includes a fixed end and a rotary end, the fixed end and the rotary end are coaxially disposed, and the fixed end is located above the rotary end;
the rotating end comprises a rotating end magnetic core 1 and an annular rotating end coil 2, the rotating end magnetic core 1 is a pot-shaped magnetic core, the upper end of the rotating end magnetic core is open, the rotating end magnetic core comprises a rotating end magnetic core bottom surface, and a rotating end magnetic core inner wall and a rotating end magnetic core outer wall which are coaxial and are positioned on the rotating end magnetic core bottom surface, and an annular groove between the rotating end magnetic core inner wall and the rotating end magnetic core outer wall is provided with the annular rotating end coil 2;
the fixed end comprises an ultrasonic energy transmission unit and an ultrasonic feedback signal acquisition unit;
the ultrasonic energy transmission unit comprises an ultrasonic energy transmission unit magnetic circuit and an ultrasonic energy transmission unit coil 3;
the ultrasonic feedback signal acquisition unit comprises an ultrasonic feedback signal acquisition unit magnetic circuit and an ultrasonic feedback signal acquisition unit coil 4;
the magnetic cores 5 forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are respectively partial arc-shaped magnetic cores obtained by cutting from a pot-shaped magnetic core; the sum of central angles of the two arc-shaped magnetic cores is less than 360 degrees, the two arc-shaped magnetic cores are coaxially and horizontally arranged in a circumferential adjacent manner, the ultrasonic energy transmission unit coil 3 and the ultrasonic feedback signal acquisition unit coil 4 are waist-shaped coils wound on the outer wall of the magnetic cores through inner grooves of the arc-shaped magnetic cores, the number of turns of the ultrasonic energy transmission unit coil 3 is the same as that of the ultrasonic feedback signal acquisition unit coil 4, an electromagnetic isolation plate 6 is arranged between the adjacent end faces of the ultrasonic energy transmission unit coil 3 and the ultrasonic feedback signal acquisition unit coil 4, and the gap between the electromagnetic isolation plate 6 and the electromagnetic isolation plate 6 is larger than 1 mm;
the lower ends of magnetic cores 5 forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are open; the magnetic cores 5 forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are coaxially and axially arranged with the rotating end magnetic core 1, and the axial gap between the end surfaces of the magnetic cores of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit is larger than 0 and smaller than or equal to 2 mm;
a rotary end magnetic core outer sleeve 7 is arranged on the bottom surface of the rotary end magnetic core, the inner wall of the rotary end magnetic core and the outer side of the outer wall of the rotary end magnetic core;
the outer walls of the magnetic cores 5 forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are provided with fixed end magnetic core jackets 8.
Example 5
As shown in fig. 9 and 10, a device for non-contact rotary ultrasonic processing energy transmission and feedback signal acquisition comprises a fixed end and a rotary end, wherein the fixed end and the rotary end are coaxially arranged, and the fixed end is located above the rotary end.
The rotating end comprises a rotating end magnetic core 1 and an annular rotating end coil 2, the rotating end magnetic core 1 is a pot-shaped magnetic core, the upper end of the rotating end magnetic core is open, the rotating end magnetic core comprises a rotating end magnetic core bottom surface, and a rotating end magnetic core inner wall and a rotating end magnetic core outer wall which are coaxial and are positioned on the rotating end magnetic core bottom surface, and an annular groove between the rotating end magnetic core inner wall and the rotating end magnetic core outer wall is provided with the annular rotating end coil 2;
the fixed end comprises an ultrasonic energy transmission unit and an ultrasonic feedback signal acquisition unit;
the ultrasonic energy transmission unit comprises an ultrasonic energy transmission unit magnetic circuit and an ultrasonic energy transmission unit coil 3;
the ultrasonic feedback signal acquisition unit comprises an ultrasonic feedback signal acquisition unit magnetic circuit and an ultrasonic feedback signal acquisition unit coil 4;
the magnetic cores 5 forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are a pot-shaped magnetic core and a part of arc-shaped magnetic cores on the pot-shaped magnetic core; the central angle of the arc-shaped magnetic core is less than 360 degrees, the lower ends of the magnetic cores 5 forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are open, the magnetic cores 5 forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are coaxially and axially arranged with the magnetic core at the rotating end, and the axial gap between the end surfaces of the magnetic cores of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit is more than 0 and less than or equal to 2 mm;
the ultrasonic energy transmission unit coil 3 and the ultrasonic feedback signal acquisition unit coil 4 are axially arranged, the ultrasonic energy transmission unit coil 3 is positioned at the bottom of the annular groove of the tank-shaped magnetic core, the ultrasonic feedback signal acquisition unit coil 4 is wound on the outer wall of the magnetic core of the ultrasonic energy transmission unit coil 3 through the inner groove of the arc-shaped magnetic core, and the number of turns of the ultrasonic energy transmission unit coil 3 is the same as that of the ultrasonic feedback signal acquisition unit coil 4;
an electromagnetic isolation plate 6 is arranged between the end faces of the ultrasonic energy transmission unit coil 3 adjacent to the ultrasonic feedback signal acquisition unit coil 4, and the gap between the electromagnetic isolation plate and the electromagnetic isolation plate is larger than 1 mm.
Example 6
As shown in fig. 11, a method for performing non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition according to the apparatus for non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition described in embodiment 1 includes the following steps:
the ultrasonic power supply is electrified and initialized, the frequency and power output are inverted into high-frequency alternating current through an inversion module, and the energy is transmitted to the annular rotating end coil through the ultrasonic energy transmission unit, so that the vibration system is excited to carry out high-frequency ultrasonic vibration processing;
the ultrasonic feedback signal acquisition unit is isolated from the ultrasonic energy transmission unit in signal mode and acquires electric signals (signals such as current or voltage) of the vibration system; the ultrasonic energy transmission and feedback signal acquisition structures are different, the electrical properties of the ultrasonic energy transmission and feedback signal acquisition structures are also different, in order to conveniently extract and process signals with different sizes and accurately and effectively perform frequency tracking, the effective sectional area ratio of the rotating end magnetic core to the fixed end feedback signal acquisition unit magnetic core is made to be n, the feedback signals are amplified by n times, the amplified signals are transmitted to the signal filtering module to be processed, the processed signals are finally sent to the ultrasonic power supply MCU to be subjected to response processing, and then the frequency output of the ultrasonic power supply is adjusted to perform real-time tracking of a resonance state.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition device comprises a fixed end and a rotary end, wherein the fixed end and the rotary end are coaxially arranged, and the fixed end is positioned above the rotary end,
the rotating end comprises a rotating end magnetic core and an annular rotating end coil, the rotating end magnetic core is a pot-shaped magnetic core, the upper end of the rotating end magnetic core is open, the rotating end magnetic core comprises a rotating end magnetic core bottom surface, and a rotating end magnetic core inner wall and a rotating end magnetic core outer wall which are positioned on the rotating end magnetic core bottom surface and are coaxial, and an annular groove between the rotating end magnetic core inner wall and the rotating end magnetic core outer wall is provided with the annular rotating end coil;
the fixed end comprises an ultrasonic energy transmission unit and an ultrasonic feedback signal acquisition unit;
the ultrasonic energy transmission unit comprises an ultrasonic energy transmission unit magnetic circuit and an ultrasonic energy transmission unit coil;
the ultrasonic feedback signal acquisition unit comprises an ultrasonic feedback signal acquisition unit magnetic circuit and an ultrasonic feedback signal acquisition unit coil;
the magnetic cores forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are common pot-shaped magnetic cores or common partial arc-shaped magnetic cores obtained by cutting from the pot-shaped magnetic cores or the pot-shaped magnetic cores and partial arc-shaped magnetic cores on the pot-shaped magnetic cores respectively;
the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil are annular coils wound in the ring grooves of the tank-shaped magnetic core or waist-shaped coils wound on the outer wall of the magnetic core through the inner grooves of the arc-shaped magnetic core;
the lower ends of magnetic cores forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are open;
the magnetic cores forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are coaxially and axially arranged with the magnetic core at the rotating end, and the axial gap between the end surfaces of the magnetic cores of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit is larger than 0 and smaller than or equal to 2 mm;
an electromagnetic isolation plate for reducing mutual interference between signals is arranged between the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil.
2. The apparatus according to claim 1, wherein the magnetic cores of the fixed end ultrasonic energy transmission unit magnetic circuit and the ultrasonic feedback signal acquisition unit magnetic circuit are respectively partial arc magnetic cores obtained by cutting from a pot-shaped magnetic core, the two arc magnetic cores are coaxially and horizontally arranged in circumferential direction, and the sum of central angles of the two arc magnetic cores is less than or equal to 360 °;
the turns of the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil which are respectively positioned in the two arc-shaped magnetic cores are the same;
if the sum of central angles of the two arc-shaped magnetic cores is equal to 360 degrees, the two arc-shaped magnetic cores are oppositely arranged, the electromagnetic isolation plate is arranged between the opposite end surfaces of the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil in the two arc-shaped magnetic cores respectively, and the gap between the electromagnetic isolation plate and the electromagnetic isolation plate is larger than 1 mm;
if the sum of central angles of the two arc-shaped magnetic cores is smaller than 360 degrees, the two arc-shaped magnetic cores are adjacently arranged, the electromagnetic isolation plate is arranged between the adjacent end surfaces of the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil which are respectively positioned in the two arc-shaped magnetic cores, and the gap between the electromagnetic isolation plate and the electromagnetic isolation plate is larger than 1 mm.
3. The apparatus for non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition as claimed in claim 1, wherein the cores constituting the fixed end constituting the magnetic circuit of the ultrasonic energy transmission unit and the magnetic circuit of the ultrasonic feedback signal acquisition unit are common pot cores or common partially arc pot cores cut from the pot cores; the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil are axially arranged and have the same number of turns;
the electromagnetic isolation plate is arranged between the end faces of the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil, and the gap between the electromagnetic isolation plate and the electromagnetic isolation plate is larger than 1 mm.
4. The apparatus for non-contact rotational ultrasonic machining energy transmission and feedback signal collection according to claim 1, wherein the magnetic cores forming the fixed end to form the magnetic circuit of the ultrasonic energy transmission unit and the magnetic circuit of the ultrasonic feedback signal collection unit are a pot-shaped magnetic core and a part of an arc-shaped magnetic core on the pot-shaped magnetic core, respectively, the coil of the ultrasonic energy transmission unit and the coil of the ultrasonic feedback signal collection unit are axially arranged, one is located at the bottom of the ring groove of the pot-shaped magnetic core, and the other is wound on the outer wall of the magnetic core through the inner groove of the arc-shaped magnetic core, and the number of turns of the coil of the ultrasonic energy transmission unit and the coil of the ultrasonic feedback signal collection unit is the same;
the electromagnetic isolation plate is arranged between the end faces of the ultrasonic energy transmission unit coil and the ultrasonic feedback signal acquisition unit coil, and the gap between the electromagnetic isolation plate and the electromagnetic isolation plate is larger than 1 mm.
5. The apparatus for non-contact rotational ultrasonic machining energy transmission and feedback signal acquisition of claim 1, wherein a rotating end core outer sleeve is disposed on the bottom surface of the rotating end core, the inner wall of the rotating end core, and the outer wall of the rotating end core;
the outer walls of the magnetic cores forming the magnetic circuits of the ultrasonic energy transmission unit and the ultrasonic feedback signal acquisition unit are provided with fixed end magnetic core jackets.
6. The non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition device according to claim 1, wherein the non-contact rotary ultrasonic machining energy transmission and feedback signal acquisition method comprises the following steps:
the ultrasonic power supply is electrified and initialized, the frequency and power output are inverted into high-frequency alternating current through an inversion module, and the energy is transmitted to the annular rotating end coil through the ultrasonic energy transmission unit, so that the vibration system is excited to carry out high-frequency ultrasonic vibration processing;
the ultrasonic feedback signal acquisition unit is isolated from the ultrasonic energy transmission unit in signal and acquires the electric signal of the vibration system; the ultrasonic energy transmission and feedback signal acquisition structures are different, the ultrasonic energy transmission and feedback signal acquisition structures show different electrical properties, in order to conveniently extract and process signals with different sizes, accurately and effectively perform frequency tracking, the feedback signals are amplified, the amplified signals are transmitted to a signal filtering module to be processed, the processed signals are finally sent to an ultrasonic power supply MCU to be processed in a response mode, and then the frequency output of the ultrasonic power supply is adjusted to perform real-time tracking of a resonance state.
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| CN112600311B (en) * | 2020-12-15 | 2023-06-30 | 重庆前卫无线电能传输研究院有限公司 | Nested wireless energy signal synchronous transmission device |
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