CN109038836B - Wireless energy transmission system - Google Patents
Wireless energy transmission system Download PDFInfo
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- CN109038836B CN109038836B CN201810749799.2A CN201810749799A CN109038836B CN 109038836 B CN109038836 B CN 109038836B CN 201810749799 A CN201810749799 A CN 201810749799A CN 109038836 B CN109038836 B CN 109038836B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 44
- 239000002184 metal Substances 0.000 claims abstract description 119
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 230000005672 electromagnetic field Effects 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 3
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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
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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
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
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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
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Waveguide Aerials (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a wireless energy transmission system, which comprises a receiving device and a transmitting device, wherein the receiving device and the transmitting device both comprise dielectric layers, the bottoms of the dielectric layers are provided with grounding plates, the tops of the dielectric layers are provided with annular metal patches with openings, reactance elements are loaded at the openings of the annular metal patches, the annular metal patches feed through a feed structure, and the annular metal patches in the receiving device and the annular metal patches in the transmitting device are arranged in a face-to-face and parallel mode. The invention adopts the annular metal patch loaded with the reactance element to replace the traditional wireless charging transceiver coil as the transmitting device and the receiving device of wireless energy, can enlarge the allowable offset range of the transmitting device and the receiving device on the premise of ensuring the same energy transmission efficiency, and reduces the alignment precision requirement of the transmitting device and the receiving device. In addition, the system can be manufactured by adopting a mature printed circuit board process, so that the cost is effectively reduced, and the consistency performance is improved.
Description
Technical Field
The present invention relates to radio technology, and more particularly, to a system for providing wireless charging for wireless electronic devices.
Background
The technology of realizing wireless energy transmission through electromagnetic waves can be used for providing wireless charging for wireless electronic equipment so as to reduce use and maintenance cost caused by battery replacement or wired charging. Currently, wireless charging technology based on magnetic coupling has been implemented in consumer electronics products such as electric toothbrushes and mobile phones for more mature commercial applications. The technology adopts a low-frequency electromagnetic field (usually thousands to several megahertz), has the characteristics of high efficiency, is easy to meet the human body safety standard, and has the defects that the wireless energy receiving and transmitting device is required to be accurately aligned, and the energy transmission efficiency is greatly reduced due to slight deviation of the relative position. In addition, the energy receiving and transmitting devices of the magnetic coupling wireless charging system all adopt a multi-turn coil structure, the compatibility and consistency of products of different manufacturers are poor, and the cost is high.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a wireless energy transmission system, which can reduce the alignment precision requirement of a wireless energy receiving and transmitting device, effectively reduce the cost, improve the consistency performance and replace the coil structure in the prior art.
The technical scheme is as follows: the wireless energy transmission system comprises a receiving device and a transmitting device, and is characterized in that: the receiving device and the transmitting device both comprise dielectric layers, a ground plate is arranged at the bottoms of the dielectric layers, annular metal patches with openings are arranged at the tops of the dielectric layers, reactance elements are loaded at the openings of the annular metal patches, the annular metal patches are fed through a feed structure, and the annular metal patches in the receiving device and the annular metal patches in the transmitting device are arranged in a face-to-face and parallel mode.
Further, the receiving device and the transmitting device both comprise an annular metal patch.
As a typical case, the annular metal patch in the receiving device and the annular metal patch in the transmitting device satisfy the following relationship: max (r)1,r2)≤2min(r1,r2)，0≤Δr<min(r1,r2)，0<d<min(r1,r2) (ii) a Wherein r is1Is the radius of the annular metal patch in the emitting device, r2Radius of the annular metal patch in the receiving device, max (r)1,r2) Represents r1And r2The larger of the two radii, min (r)1,r2) Represents r1And r2The smaller radius value of the two radii, Δ r is the distance between the central axis of the annular metal patch in the transmitting device and the central axis of the annular metal patch in the receiving device, and d is the distance between the surface where the annular metal patch is located in the transmitting device and the surface where the annular metal patch is located in the receiving device. When the annular metal patch in the receiving device and the annular metal patch in the transmitting device satisfy the above relationship, the energy transmission efficiency equivalent to that of the prior art can be maintained by finely adjusting the transmission frequency of the wireless energy. That is, Δ r and d allow a certain range of offset (Δ r and d offset may be min (r) on the premise that equivalent energy transfer efficiency can be achieved1,r2) This effectively reduces the accuracy requirements for alignment of the receiving device with the transmitting device.
As another typical case, the annular metal patch in the receiving device and the annular metal patch in the transmitting device satisfy the following relationship: max (r)1,r2)>2min(r1,r2)，|r1-r2|-min(r1,r2)/3<Δr<|r1-r2|+min(r1,r2)/3，0<d<min(r1,r2) (ii) a Wherein r is1Is the radius of the annular metal patch in the emitting device, r2Radius of the annular metal patch in the receiving device, max (r)1,r2) Represents r1And r2The larger of the two radii, min (r)1,r2) Represents r1And r2The smaller radius value of the two radii, Δ r is the distance between the central axis of the annular metal patch in the transmitting device and the central axis of the annular metal patch in the receiving device, and d is the distance between the surface where the annular metal patch is located in the transmitting device and the surface where the annular metal patch is located in the receiving device. When the annular metal patch in the receiving device and the annular metal patch in the transmitting device satisfy the above relationship, the energy transmission efficiency equivalent to that of the prior art can be maintained by finely adjusting the transmission frequency of the wireless energy. That is, Δ r and d allow a certain range of offset (Δ r offset can be up to 2min (r offset) with equal energy transfer efficiency1,r2) The d offset can reach min (r) in the range of/31,r2) This effectively reduces the accuracy requirements for alignment of the receiving device with the transmitting device.
Further, the transmitting means comprises a plurality of concentric annular metal patches and/or the receiving means comprises a plurality of concentric annular metal patches. Therefore, the plurality of annular metal patches are provided, each annular metal patch corresponds to one energy transmitting channel or energy receiving channel, when the delta r and the d are different in value, a pair of transmitting channel and receiving channel with the highest energy transmission efficiency can be selected for wireless energy transmission, and the allowable offset distance of the delta r can be further enlarged.
Further, the reactance value of the reactance element is adjustable. This can further improve the energy transfer efficiency.
Furthermore, the transmitting device also comprises a single-pole multi-throw switch, a moving contact of the single-pole multi-throw switch is connected with a feed structure in the transmitting device, and a plurality of static contacts of the single-pole multi-throw switch are respectively connected with different power sources and total reflection loads. When a certain pair of transceiving channels is selected for energy transmission, the single-pole multi-throw switch of the transmitting channel is connected with the feed structure and the power source, and the single-pole multi-throw switches of other transmitting channels can select the feed structure to be connected with a certain optimal total reflection load, so that the energy transmission efficiency is further improved.
Furthermore, the receiving device also comprises a single-pole multi-throw switch, a moving contact of the single-pole multi-throw switch is connected with a feed structure in the receiving device, and a plurality of static contacts of the single-pole multi-throw switch are respectively connected with different energy receiving loads and total reflection loads. When a certain pair of transceiving channels is selected for energy transmission, the single-pole multi-throw switch of the receiving channel is connected with the feed structure and the energy receiving load, and the single-pole multi-throw switches of other receiving channels can select the feed structure to be connected with a certain optimal total reflection load, so that the energy transmission efficiency is further improved.
Has the advantages that: the invention discloses a wireless energy transmission system, which adopts an annular metal patch loaded with a reactance element to replace a traditional wireless charging receiving and transmitting coil as a transmitting device and a receiving device of wireless energy, can expand the allowable offset range of the transmitting device and the receiving device and reduce the alignment precision requirement of the transmitting device and the receiving device on the premise of ensuring the same energy transmission efficiency. In addition, the system can be manufactured by adopting a mature printed circuit board process, so that the cost is effectively reduced, and the consistency performance is improved.
Drawings
Fig. 1 is a top view of an emitting device in embodiment 1 of the present invention;
fig. 2 is a side view of a transmitting apparatus in embodiment 1 of the present invention;
FIG. 3 is a block diagram of a system in embodiment 2 of the present invention;
FIG. 4 is a block diagram of a system in embodiment 3 of the present invention;
FIG. 5 is a top view of an emitter device in embodiment 4 of the present invention;
fig. 6 is a structural diagram of a system when Δ r is smaller than a certain threshold in embodiment 4 of the present invention;
fig. 7 is a structural diagram of a system when Δ r is greater than a certain threshold in embodiment 4 of the present invention;
fig. 8 is a simulation result of energy transmission efficiency of a receiving device relative to a transmitting device at different Δ r when a dual annular metal patch is used as the transmitting device in the embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be further described with reference to the following detailed description and the accompanying drawings.
The specific embodiment discloses a wireless energy transmission system, which comprises a receiving device and a transmitting device, wherein the receiving device and the transmitting device both comprise dielectric layers, the bottoms of the dielectric layers are provided with grounding plates, the tops of the dielectric layers are provided with annular metal patches with openings, reactance elements are loaded at the openings of the annular metal patches, the annular metal patches are fed through a feed structure, and the annular metal patches in the receiving device and the annular metal patches in the transmitting device are arranged in a face-to-face and parallel mode. The feed structure may be a coaxial feed structure, or may be replaced by a microstrip feed or other form of feed structure.
Energy is fed to the annular metal patch in the transmitting device through the feed structure, non-radiated electromagnetic field distribution is formed around the annular metal patch, coupling is formed through the annular metal patch in the receiving device distributed by the electromagnetic field, and the annular metal patch in the receiving device outputs the coupled and received electromagnetic energy through the feed structure.
This embodiment is further illustrated by the following examples.
Example 1:
in this embodiment, the receiving device and the transmitting device each include an annular metal patch. Fig. 1 and 2 show the structure of the emitting device, which can be seen to comprise a thickness h1The bottom of the dielectric layer 3 is provided with a grounding plate 4, the top of the dielectric layer 3 is provided with an annular metal patch 1 with an opening, and the opening of the annular metal patch 1 is loaded with a reactance element 2. The reactive element 2 may be a capacitor or an inductor. The annular metal patch 1 is fed by a coaxial feed structure, the outer conductor of which is connected with the ground plate 4The top end of the inner conductor 5 is connected with the annular metal patch 1. The radius of the annular metal patch 1 is r1Width of w1The included angle between the connecting line between the top end of the inner conductor 5 and the circle center of the annular metal patch 1 and the connecting line between the reactance element 2 and the circle center of the annular metal patch 1 is alpha1. The structure of the receiving device is the same as that of the transmitting device, and therefore, no drawing is given.
In this embodiment, the coupling frequency of the two annular metal patches can be adjusted by selecting the radius, the width, the thickness of the dielectric layer, the included angle between the connection line between the top end of the inner conductor and the center of the annular metal patch and the connection line between the reactance element and the center of the annular metal patch, and the reactance value of the reactance element, so that the allowable offset range of the transmitting device and the receiving device is expanded on the premise of ensuring that the energy transmission efficiency is equal.
Example 2:
Example 3:
Example 4:
in this embodiment, as shown in fig. 5, the emitting device includes two concentric annular metal patches. In fig. 6, the upper part is a receiving device, the lower part is a transmitting device, and the receiving device comprises a ring-shaped metal patch. For convenience of description, the innermost annular metal patch in fig. 6 is referred to as a first energy transmitting port, the outermost annular metal patch in fig. 6 is referred to as a second energy transmitting port, and the annular metal patch of the receiving device in fig. 6 is referred to as an energy receiving port. When Δ r is smaller than a certain threshold, the energy transmission efficiency between the first energy transmitting port and the energy receiving port is higher than the energy transmission efficiency between the second energy transmitting port and the energy receiving port, and then the first energy transmitting port can be selected as the energy transmitting port. When Δ r is greater than a certain threshold, the energy transmission efficiency between the second energy transmitting port and the energy receiving port is higher than the energy transmission efficiency between the first energy transmitting port and the energy receiving port, and the second energy transmitting port can be selected as the energy transmitting port.
Fig. 8 is a simulation result of energy transfer efficiency of the receiving device with respect to the transmitting device at different Δ r in the present embodiment. Fig. 8 is simulated under the following parameters: the radius of the annular metal patch on the innermost circle in the launching device is 5cm, and the radius of the annular metal patch on the outermost circle is 7 cm; the radius of the annular metal patch in the receiving device is 3 cm; the distance between the surface of the annular metal patch in the transmitting device and the surface of the annular metal patch in the receiving device is 8 cm. Through the optimized design, the energy transmission efficiency of more than 80 percent can be realized on the frequency band of 325 MHz. From the simulation results of fig. 8, it is shown that when Δ r <3.25cm, an energy transfer efficiency of more than 80% can be obtained using the first energy emission port as the energy emission port. When 3.25cm < ar <5.5cm, an energy transfer efficiency of more than 80% can be obtained using the second energy emitting port as the energy emitting port.
Example 5:
on the basis of the remaining embodiments, the reactance value of the reactive element is adjustable. Other contents are the same as those of the other embodiments, and are not described again.
Example 6:
on the basis of other embodiments, the transmitting device further comprises a single-pole multi-throw switch, a moving contact of the single-pole multi-throw switch is connected with a feed structure in the transmitting device, and a plurality of static contacts of the single-pole multi-throw switch are respectively connected with different power sources and total reflection loads. When a certain pair of transceiving channels is selected for energy transmission, the single-pole multi-throw switch of the transmitting channel is connected with the feed structure and the power source, and the single-pole multi-throw switches of other transmitting channels can select the feed structure to be connected with a certain optimal total reflection load, so that the energy transmission efficiency is further improved. Other contents are the same as those of the other embodiments, and are not described again.
Example 7:
on the basis of other embodiments, the receiving device further comprises a single-pole multi-throw switch, a moving contact of the single-pole multi-throw switch is connected with a feed structure in the receiving device, and a plurality of static contacts of the single-pole multi-throw switch are respectively connected with different energy receiving loads and total reflection loads. When a certain pair of transceiving channels is selected for energy transmission, the single-pole multi-throw switch of the receiving channel is connected with the feed structure and the energy receiving load, and the single-pole multi-throw switches of other receiving channels can select the feed structure to be connected with a certain optimal total reflection load, so that the energy transmission efficiency is further improved. Other contents are the same as those of the other embodiments, and are not described again.
Claims (4)
1. A wireless energy transmission system comprises a receiving device and a transmitting device, and is characterized in that: the receiving device and the transmitting device both comprise dielectric layers, the bottom of each dielectric layer is provided with a ground plate, the top of each dielectric layer is provided with an annular metal patch with an opening, a reactance element is loaded at the opening of each annular metal patch, the annular metal patches feed power through a feed structure, and the annular metal patches in the receiving device and the annular metal patches in the transmitting device are arranged in a face-to-face and parallel mode;
energy is fed to the annular metal patch in the transmitting device through the feed structure, non-radiative electromagnetic field distribution is formed around the annular metal patch, coupling is formed by the electromagnetic field distribution in the annular metal patch in the receiving device, and the annular metal patch in the receiving device outputs coupled and received electromagnetic energy through the feed structure;
the transmitting device comprises a plurality of coaxially arranged annular metal patches and/or the receiving device comprises a plurality of coaxially arranged annular metal patches, a pair of annular metal patches with the largest coupling between the transmitting device and the receiving device is selected for wireless energy transmission, wherein each annular metal patch corresponds to one energy transmitting channel or one energy receiving channel, and when delta r and d are different in value, the pair of transmitting channel and receiving channel with the highest energy transmission efficiency can be selected for wireless energy transmission, so that the allowable offset distance of the delta r can be further enlarged;
wherein, the annular metal paster in the receiving arrangement satisfies following relation with the annular metal paster in the emitter: Δ r is not less than 0<min(r1,r2)，0<d<min(r1,r2)，max(r1,r2)≤2min(r1,r2) (ii) a Wherein r is1Is the radius of the annular metal patch in the emitting device, r2Radius of the annular metal patch in the receiving device, max (r)1,r2) Represents r1And r2The larger of the two radii, min (r)1,r2) Represents r1And r2The smaller radius value of the two radii, delta r is the distance between the central axis of the annular metal patch in the transmitting device and the central axis of the annular metal patch in the receiving device, and d is the distance between the surface of the annular metal patch in the transmitting device and the surface of the annular metal patch in the receiving device;
or, the annular metal patch in the receiving device and the annular metal patch in the transmitting device satisfy the following relationship: | r1-r2|-min(r1,r2)/3<Δr<|r1-r2|+min(r1,r2)/3，0<d<min(r1,r2)，max(r1,r2)>2min(r1,r2) B, carrying out the following steps of; wherein r is1Is the radius of the annular metal patch in the emitting device, r2Radius of the annular metal patch in the receiving device, max (r)1,r2) Represents r1And r2The larger of the two radii, min (r)1,r2) Represents r1And r2The smaller radius value of the two radii, Δ r is the distance between the central axis of the annular metal patch in the transmitting device and the central axis of the annular metal patch in the receiving device, d is the distance between the central axis of the annular metal patch in the transmitting device and the central axis of the annular metal patch in the receiving deviceThe distance between the surface of the annular metal patch and the surface of the annular metal patch in the receiving device.
2. The wireless energy transfer system of claim 1, wherein: the reactance value of the reactance element is adjustable.
3. The wireless energy transfer system of claim 1, wherein: the transmitting device further comprises a single-pole multi-throw switch, a moving contact of the single-pole multi-throw switch is connected with a feed structure in the transmitting device, a plurality of static contacts of the single-pole multi-throw switch are respectively connected with different power sources and total reflection loads, when a certain pair of transmitting and receiving channels are selected for energy transmission, the single-pole multi-throw switch of the transmitting channel is connected with the feed structure and the power sources, and single-pole multi-throw switches of other transmitting channels can select the feed structure to be connected with a certain total reflection load, so that the energy transmission efficiency is further improved.
4. The wireless energy transfer system of claim 1, wherein: the receiving device also comprises a single-pole multi-throw switch, a movable contact of the single-pole multi-throw switch is connected with a feed structure in the receiving device, a plurality of stationary contacts of the single-pole multi-throw switch are respectively connected with different energy receiving loads and total reflection loads, when a certain pair of receiving and transmitting channels are selected for energy transmission, the single-pole multi-throw switch of the receiving channel is connected with the feed structure and the energy receiving loads, and single-pole multi-throw switches of other receiving channels can select the feed structure to be connected with a certain total reflection load, so that the energy transmission efficiency is further improved.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810749799.2A CN109038836B (en) | 2018-07-10 | 2018-07-10 | Wireless energy transmission system |
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| CN201810749799.2A CN109038836B (en) | 2018-07-10 | 2018-07-10 | Wireless energy transmission system |
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| CN109038836B true CN109038836B (en) | 2022-04-19 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101233664A (en) * | 2005-07-27 | 2008-07-30 | Ls电线有限公司 | Wireless charger decreased in variation of charging efficiency |
| CN102027688A (en) * | 2008-05-13 | 2011-04-20 | 高通股份有限公司 | Receive antenna for wireless power transfer |
| CN102318136A (en) * | 2009-02-16 | 2012-01-11 | 索尼爱立信移动通讯有限公司 | Antenna arrangement for high speed data transfer and wireless energy transfer |
| CN103872798A (en) * | 2014-03-27 | 2014-06-18 | 武汉大学 | Magnetic resonance wireless energy transmission system and optimization method of positions of coils thereof |
| CN207339426U (en) * | 2017-06-27 | 2018-05-08 | 青岛鲁渝能源科技有限公司 | Radio energy transmission system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8144066B2 (en) * | 2009-02-26 | 2012-03-27 | Harris Corporation | Wireless communications including an antenna for wireless power transmission and data communication and associated methods |
| JP2012186949A (en) * | 2011-03-07 | 2012-09-27 | Hitachi Maxell Energy Ltd | Non-contact power transmission device utilizing magnetic field resonance |
-
2018
- 2018-07-10 CN CN201810749799.2A patent/CN109038836B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101233664A (en) * | 2005-07-27 | 2008-07-30 | Ls电线有限公司 | Wireless charger decreased in variation of charging efficiency |
| CN102027688A (en) * | 2008-05-13 | 2011-04-20 | 高通股份有限公司 | Receive antenna for wireless power transfer |
| CN102318136A (en) * | 2009-02-16 | 2012-01-11 | 索尼爱立信移动通讯有限公司 | Antenna arrangement for high speed data transfer and wireless energy transfer |
| CN103872798A (en) * | 2014-03-27 | 2014-06-18 | 武汉大学 | Magnetic resonance wireless energy transmission system and optimization method of positions of coils thereof |
| CN207339426U (en) * | 2017-06-27 | 2018-05-08 | 青岛鲁渝能源科技有限公司 | Radio energy transmission system |
Non-Patent Citations (1)
| Title |
|---|
| 低功率微波整流技术研究与应用;王陇刚;《中国优秀硕士学位论文全文数据库 信息科技辑》;20170315;第33-34页 * |
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