CN106643456A - Pedal travel measuring device and method for driving data collection system - Google Patents
Pedal travel measuring device and method for driving data collection system Download PDFInfo
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- CN106643456A CN106643456A CN201710056891.6A CN201710056891A CN106643456A CN 106643456 A CN106643456 A CN 106643456A CN 201710056891 A CN201710056891 A CN 201710056891A CN 106643456 A CN106643456 A CN 106643456A
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- foil gauge
- pedal
- pedal travel
- rear end
- cylinder
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- General Physics & Mathematics (AREA)
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- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a pedal travel measuring device and a pedal travel measuring method for a driving data collection system. The measuring device comprises a pedal, a first transmission rod, a second transmission rod, a cylinder, a strain gage and a data collection and control module, wherein the first transmission rod is hinged to the rear end of the pedal, the rear end of the first transmission rod is hinged with the front end of the second transmission rod, the cylinder is connected to the rear end of the second transmission rod, the strain gage is adhered to the cylinder, a spring is connected to the rear end of the cylinder, the rear end of the spring is fixed to a fixing plate, a pedal assembly and the fixing plate are fixedly connected to a bottom plate separately, and the data collection and control module is respectively connected with an action signal switch at the lower end of the pedal and the strain gage. The measuring method comprises the following steps: step 1: determining a fitting function; step 2: presetting the fitting function in a pedal travel simulation controller; and step 3: calculating a pedal travel. The beneficial effects are as follows: the structure is simple and the cost of the measuring system is effectively reduced.
Description
Technical field
The present invention relates to a kind of pedal travel measurement apparatus and method, more particularly to a kind of to be used for driving data acquisition system
Pedal travel measurement apparatus and method.
Background technology
Currently, the acquisition technique of driving data is basis and the necessary links of driver's behavioral study, in running car
The behavioral study of driver has great significance, and obtains driver's operation brake pedal, clutch pedal, the correlation of accelerator pedal
Information is a ring important in driving data collection.Whether and phase driver's operation brake pedal, clutch pedal, accelerator pedal
Pedal travel is answered all directly to reflect the manipulation intention and vehicle running state of driver.
Existing pedal travel measurement apparatus and method for driving data acquisition system often adopt displacement transducer,
Measuring system high cost, and it is difficult to the accurate measurement of pedal travel.China Patent Publication No. is CN203605932U, open
Day is 2014.05.21, and a kind of entitled content of the invention of automobile brake pedal displacement measuring device of utility model employs position
Displacement sensor, result in greatly increasing for measuring system cost.If China Patent Publication No. is CN105620443A, publication date is
2016.06.01, the content of the invention that a kind of entitled brake-pedal travel computing device and its computational methods are shown, will
The linear equation in the relation multistage interval between pedal travel and master cylinder pressure is described, it is difficult to ensure that pedal travel is measured
Accuracy.
The content of the invention
The invention aims to solve prior art presence to be difficult to accurate measurement pedal travel, apparatus structure multiple
The problems such as miscellaneous, high cost and a kind of pedal travel measurement apparatus and method for driving data acquisition system for providing.
Pedal, the first transmission are included provided by the present invention for the pedal travel measurement apparatus of driving data acquisition system
Bar, the second drive link, cylinder, foil gauge and data acquisition and control module, wherein the first drive link is hinged on after pedal
End, the rear end of the first drive link is hinged with the front end of the second drive link, and cylinder is connected to the rear end of the second drive link, strain
Piece is sticked on the cylinder, and the rear end of cylinder is connected with spring, and the rear end of spring is fixed in fixed plate, pedal assembly with it is solid
Fixed board is respectively fixedly connected with base plate, and data collection and control module is switched and foil gauge phase respectively with the action signal of pedal lower end
Connection.
Pedal Pedal is hinged on pedal support under the support of two support arms, and the connecting shaft of two support arm lower ends is provided with
Return spring, offer several lightening holes on the surface of pedal, lightening hole is shaped as regular hexagon, and the length of side is 4.6-5.2mm.
Second drive link is located on limiting bracket.
The spring of cylinder rear end is plugged in a sleeve, and the front end of sleeve is provided with spring stop, the rear end of cylinder with
The front end of spring is connected by spring stop.
Foil gauge be by the first foil gauge, the second foil gauge, the 3rd foil gauge, the 4th foil gauge, the 5th foil gauge, the 6th
Foil gauge, the 7th foil gauge and the 8th foil gauge composition, wherein the first foil gauge, the second foil gauge, the 3rd foil gauge, the 4th should
Become piece be separated by 90 ° it is axially disposed, the 5th foil gauge, the 6th foil gauge, the 7th foil gauge, the 8th foil gauge be separated by 90 ° it is vertical
In axial arranged, the first foil gauge and the 3rd foil gauge are connected on a bridge arm, and the 5th foil gauge and the 7th foil gauge are connected
On a bridge arm, the 6th foil gauge and the 8th foil gauge are connected on a bridge arm, the second foil gauge, the series connection of the 4th foil gauge
On a bridge arm, four bridge arms are working arms, constitute full-bridge circuit.
On the one hand the wire that data collection and control module is drawn is switched with the action signal of two wires and pedal lower end
It is connected, the full-bridge circuit on the other hand being constituted with foil gauge with four wires is connected, and data collection and control module includes
There are power supply, pedal travel analog controller, master control switch and protective resistance, power supply is directly powered for full-bridge circuit, full-bridge circuit
The voltage of output is acted on pedal travel analog controller, and master control switch is located on the connection line of power supply and full-bridge circuit,
Protective resistance is located on the connection line of full-bridge circuit and pedal travel analog controller, the action signal switch of pedal lower end with
Pedal travel analog controller is in parallel, and quiet, the movable contact of action signal switch are respectively arranged on pedal support and support arm.
Provided by the present invention for the pedal travel measuring method of driving data acquisition system, comprise the steps：
Step one：Calibration experiment is carried out in advance, determines the fitting function between output voltage and pedal travel；
Step 2：Fitting function between output voltage and pedal travel is set in advance in into pedal travel analog controller
In；
Step 3：When driver steps on pedal, corresponding signal is transferred to pedal travel simulation control by action signal switch
Device, by the fitting function for arranging in pedal travel analog controller in advance pedal travel is calculated.
The operation principle of the present invention：
When driver is sitting in driving cabin, if driver steps on pedal, action signal switch passes corresponding actions signal
Pedal travel analog controller is defeated by, at the same time, the compression of the spring of cylinder rear end makes cylinder be subject to corresponding pressure to answer
Power, in the presence of compression, the foil gauge and cylinder for being pasted onto periphery together produces deformation, corresponding full-bridge electricity
Road output voltage sends into pedal travel analog controller.It is defeated according to the full-bridge circuit pre-set in pedal travel analog controller
The corresponding relation represented by fitting function gone out between voltage and pedal travel, obtains corresponding pedal travel signal, so far, just
Obtain the stroke of pedal.
Heretofore described foil gauge, data collection and control module and action signal switch is the group of existing equipment
Dress, therefore, concrete model and specification are not further repeated.
Beneficial effects of the present invention：
The apparatus structure that the present invention is provided is simple, using being detachably connected between each part, be easy to separate assembling with
Measuring error；Pedal tread is disposed with lightening hole, and the maloperation caused due to skidding is it also avoid while loss of weight section material；Do not make
With the accurate measurement that pedal travel is realized in the case of displacement transducer, the cost of measuring system is effectively reduced.This
The apparatus and method of bright offer are scientific research, teaching provides a kind of effectively pedal travel for driving data acquisition system and surveys
Amount device and method, while realizing that pedal travel is accurately measured measurement cost is also saved.
Description of the drawings
Fig. 1 is device overall structure diagram of the present invention.
Fig. 2 is device cross section structure diagram of the present invention.
Fig. 3 is heretofore described pedal structure schematic diagram.
Fig. 4 is that heretofore described foil gauge arranges schematic diagram.
Fig. 5 is each foil gauge annexation schematic diagram in heretofore described full-bridge circuit.
Fig. 6 is heretofore described data collection and control inside modules structure and line connecting relation schematic diagram.
1st, pedal 2, the first drive link 3, the second drive link 4, cylinder 5, foil gauge
6th, data collection and control module 7, spring 8, fixed plate 9, base plate 10, action signal switch
11st, support arm 12, pedal support 13, return spring 14, lightening hole 15, limiting bracket
16th, sleeve 17, spring stop 20, the first foil gauge 21, the second foil gauge 22, the 3rd foil gauge
23rd, the 4th foil gauge 25, the 5th foil gauge 26, the 6th foil gauge 27, the 7th foil gauge
28th, the 8th foil gauge 29, full-bridge circuit 30, power supply 31, pedal travel analog controller
32nd, master control switch 33, protective resistance.
Specific embodiment
Refer to shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6：
The biography of pedal 1, first is included provided by the present invention for the pedal travel measurement apparatus of driving data acquisition system
Lever 2, the second drive link 3, cylinder 4, foil gauge 5 and data acquisition and control module 6, wherein the first drive link 2 is hinged on
The rear end of pedal 1, the rear end of the first drive link 2 is hinged with the front end of the second drive link 3, and cylinder 4 is connected to the second transmission
The rear end of bar 3, foil gauge 5 is sticked on cylinder 4, and the rear end of cylinder 4 is connected with spring 7, and the rear end of spring 7 is fixed on
In fixed board 8, the assembly of pedal 1 is respectively fixedly connected with base plate 9 with fixed plate 8, data collection and control module 6 respectively with pedal 1
The action signal switch 10 of lower end is connected with foil gauge 5.
Pedal 1 is hinged on pedal support 12 under the support of two support arms 11, in the connecting shaft of two lower ends of support arm 11
Return spring 13 is provided with, offers several lightening holes 14 on the surface of pedal 1, lightening hole 14 is shaped as regular hexagon, the length of side
For 4.6-5.2mm.
Second drive link 3 is located on limiting bracket 15.
The spring 7 of the rear end of cylinder 4 is plugged in a sleeve 16, and the front end of sleeve 16 is provided with spring stop 17, cylinder 4
Rear end be connected by spring stop 17 with the front end of spring 7.
Foil gauge 5 is answered by the first foil gauge 20, the second foil gauge 21, the 3rd foil gauge 22, the 4th foil gauge the 23, the 5th
Become piece 25, the 6th foil gauge 26, the 7th foil gauge 27 and the 8th foil gauge 28 to constitute, wherein the first foil gauge 20, second is strained
Piece 21, the 3rd foil gauge 22, the 4th foil gauge 23 be separated by 90 ° it is axially disposed, the 5th foil gauge 25, the 6th foil gauge 26,
Seven foil gauges 27, the 8th foil gauge 28 are separated by 90 ° perpendicular to axial arranged, and the first foil gauge 20 and the 3rd foil gauge 22 are connected on
On one bridge arm, the 5th foil gauge 25 and the 7th foil gauge 27 are connected on a bridge arm, and the 6th foil gauge 26 and the 8th is strained
Piece 28 is connected on a bridge arm, and the second foil gauge 21, the 4th foil gauge 23 are connected on a bridge arm, and four bridge arms are works
Make arm, constitute full-bridge circuit 29.
On the one hand the wire that data collection and control module 6 is drawn is opened with two wires with the action signal of the lower end of pedal 1
Close 10 to be connected, the full-bridge circuit 29 on the other hand being constituted with foil gauge 5 with four wires is connected, data collection and control module
Power supply 30, pedal travel analog controller 31, master control switch 32 and protective resistance 33 are included in 6, power supply 30 is directly full-bridge
Circuit 29 is powered, and the voltage of the output of full-bridge circuit 29 is acted on pedal travel analog controller 31, and master control switch 32 is located at electricity
On the connection line of source 30 and full-bridge circuit 29, protective resistance 33 is located at full-bridge circuit 29 with pedal travel analog controller 31
On connection line, the action signal switch 10 of the lower end of pedal 1 is in parallel with pedal travel analog controller 31, action signal switch 10
Quiet, movable contact be respectively arranged on pedal support 12 and support arm 11.
Provided by the present invention for the pedal travel measuring method of driving data acquisition system, comprise the steps：
Step one：Calibration experiment is carried out in advance, determines the fitting function between output voltage and the stroke of pedal 1；
Step 2：Fitting function between output voltage and the stroke of pedal 1 is set in advance in into pedal travel analog controller
In 31；
Step 3：When driver steps on pedal 1, corresponding signal is transferred to pedal travel simulation control by action signal switch 10
Device processed 31, by the fitting function for arranging in pedal travel analog controller 31 in advance pedal travel is calculated.
The operation principle of the present invention：
When driver is sitting in driving cabin, if driver steps on pedal 1, action signal switchs 10 by corresponding actions signal
Pedal travel analog controller 31 is transferred to, at the same time, the compression of the spring 7 of the rear end of cylinder 4 makes cylinder 4 be subject to accordingly
Compression, in the presence of compression, the foil gauge 5 and cylinder 4 for being pasted onto periphery together produces deformation, accordingly
The output voltage of full-bridge circuit 29 send into pedal travel analog controller 31.According to setting in advance in pedal travel analog controller 31
The corresponding relation represented by fitting function between the output voltage of full-bridge circuit 29 put and the stroke of pedal 1, obtains corresponding stepping on
The stroke signal of plate 1, so far, just obtains the stroke of pedal 1.
Heretofore described foil gauge 5, data collection and control module 6 and action signal switch 10 is existing equipment
Assembling, therefore, concrete model and specification are not further repeated.
Computing Principle in the method for the invention is as described below：
Each bridge arm initial resistance of full-bridge circuit 29 is equal, is all R0.Poisson's ratio is μ, then the output voltage of full-bridge circuit 29
For：
It can be seen that the output voltage size of full-bridge circuit 29 exists with column type force measuring machine because of the deformation size that stress causes
Corresponding relation, using this corresponding relation, carries out rating test, and using voltmeter measurement the output voltage of full-bridge circuit 29 is obtained.
Experimental calibration obtains the output voltage u of m groups full-bridge circuit 29kWith pedal travel ykData：
| Effectively demarcate number of times k | 1 | 2 | … | m |
| Output voltage uk | u1 | u2 | … | um |
| Pedal travel yk | y1 | y2 | … | ym |
That is (uk, yk), k=1,2 ..., m.
It is fitted with least square method, that is, is intended to build a n formula：
Pn(u)=anun+…+a1u+a0
Seek parameters in series a0, a1..., an(n ＜ m), makes：
Its minimum of a value is taken, the multinomial for so determining is exactly data (uk, yk), the least square fitting of k=1,2 ..., m is more
Item formula.
δ (a to be taken0, a1..., an) minimum of a value, Ying You：
I.e.：
Or write as：
Introduce mark：
Then have：
sja0+sj+1a1+…+sj+nan=uj(j=1,2 ..., n)
Here it is Pn(u) coefficient a0, a1..., anThe equation group of satisfaction, as the output voltage u of full-bridge circuit 291, u2..., un
In the mutual different time, equation group has unique solution a0, a1..., an, they are causedTake minimum of a value.Now just
The output voltage u of full-bridge circuit 29 is obtainedkWith pedal travel ykBetween fitting function Pn(u)。
The output voltage u of full-bridge circuit 29 is obtained by calibration experimentkWith pedal travel ykBetween fitting function Pn(u) it
Afterwards, by fitting function PnU () is set in advance in pedal travel analog controller 31.Hereafter, to pedal travel analog controller
The output voltage u of full-bridge circuit 29 is sent into 31kAfterwards, pedal travel analog controller 31 is exportable corresponding pedal travel ykLetter
Number.
Claims (7)
1. a kind of pedal travel measurement apparatus for driving data acquisition system, it is characterised in that：Include pedal, the first biography
Lever, the second drive link, cylinder, foil gauge and data acquisition and control module, wherein the first drive link is hinged on pedal
Rear end, the rear end of the first drive link is hinged with the front end of the second drive link, and cylinder is connected to the rear end of the second drive link, should
Become piece be sticked on the cylinder, the rear end of cylinder is connected with spring, and the rear end of spring is fixed in fixed plate, pedal assembly with
Fixed plate is respectively fixedly connected with base plate, and data collection and control module is switched and foil gauge respectively with the action signal of pedal lower end
It is connected.
2. a kind of pedal travel measurement apparatus for driving data acquisition system according to claim 1, its feature exists
In：Described pedal is hinged on pedal support under the support of two support arms, and the connecting shaft of two support arm lower ends is provided with back
Position spring, offer several lightening holes on the surface of pedal, lightening hole is shaped as regular hexagon, and the length of side is 4.6-5.2mm.
3. a kind of pedal travel measurement apparatus for driving data acquisition system according to claim 1, its feature exists
In：The second described drive link is located on limiting bracket.
4. a kind of pedal travel measurement apparatus for driving data acquisition system according to claim 1, its feature exists
In：The spring of described cylinder rear end is plugged in a sleeve, and the front end of sleeve is provided with spring stop, the rear end of cylinder with
The front end of spring is connected by spring stop.
5. a kind of pedal travel measurement apparatus for driving data acquisition system according to claim 1, its feature exists
In：Described foil gauge be by the first foil gauge, the second foil gauge, the 3rd foil gauge, the 4th foil gauge, the 5th foil gauge,
Six foil gauges, the 7th foil gauge and the 8th foil gauge composition, wherein the first foil gauge, the second foil gauge, the 3rd foil gauge, the 4th
Foil gauge be separated by 90 ° it is axially disposed, the 5th foil gauge, the 6th foil gauge, the 7th foil gauge, the 8th foil gauge be separated by 90 ° hang down
Straight first foil gauge and the 3rd foil gauge are connected on a bridge arm in axial arranged, the 5th foil gauge and the 7th foil gauge string
It is associated on a bridge arm, the 6th foil gauge and the 8th foil gauge are connected on a bridge arm, the second foil gauge, the 4th foil gauge string
It is associated on a bridge arm, four bridge arms are working arms, constitutes full-bridge circuit.
6. a kind of pedal travel measurement apparatus for driving data acquisition system according to claim 1, its feature exists
In：On the one hand the wire that described data collection and control module is drawn is switched with the action signal of two wires and pedal lower end
It is connected, the full-bridge circuit on the other hand being constituted with foil gauge with four wires is connected, and data collection and control module includes
There are power supply, pedal travel analog controller, master control switch and protective resistance, power supply is directly powered for full-bridge circuit, full-bridge circuit
The voltage of output is acted on pedal travel analog controller, and master control switch is located on the connection line of power supply and full-bridge circuit,
Protective resistance is located on the connection line of full-bridge circuit and pedal travel analog controller, the action signal switch of pedal lower end with
Pedal travel analog controller is in parallel, and quiet, the movable contact of action signal switch are respectively arranged on pedal support and support arm.
7. a kind of pedal travel measuring method for driving data acquisition system, it is characterised in that：Comprise the steps：
Step one：Calibration experiment is carried out in advance, determines the fitting function between output voltage and pedal travel；
Step 2：Fitting function between output voltage and pedal travel is set in advance in pedal travel analog controller；
Step 3：When driver steps on pedal, corresponding signal is transferred to pedal travel analog controller by action signal switch, is led to
Pedal travel is calculated after the fitting function for arranging in pedal travel analog controller in advance.
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| CN201710056891.6A CN106643456B (en) | 2017-01-26 | 2017-01-26 | A kind of pedal travel measuring device and method for driving data acquisition system |
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|---|---|---|---|
| CN201710056891.6A CN106643456B (en) | 2017-01-26 | 2017-01-26 | A kind of pedal travel measuring device and method for driving data acquisition system |
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| CN106643456A true CN106643456A (en) | 2017-05-10 |
| CN106643456B CN106643456B (en) | 2019-04-16 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107170346A (en) * | 2017-05-24 | 2017-09-15 | 李伟男 | A kind of braking pedal and sense simulator for driving simulator |
| CN107270807A (en) * | 2017-07-12 | 2017-10-20 | 杨志超 | A kind of vehicle brake footrest amplitude shows system |
| CN107591053A (en) * | 2017-10-18 | 2018-01-16 | 吉林大学 | A kind of steering feel simulation and climb displacement device applied to driving simulator |
| CN107600056A (en) * | 2017-09-20 | 2018-01-19 | 吉林大学 | A kind of pedal sense simulation and climb displacement device applied to driving simulator |
| CN108127561A (en) * | 2017-12-19 | 2018-06-08 | 苏州锃道研磨技术有限公司 | It is a kind of to power off the retainable absolute position measure and control device of data and its investigating method |
| CN108874024A (en) * | 2017-05-16 | 2018-11-23 | 上海朝辉压力仪器有限公司 | Pedal controls transmitter |
| CN109017722A (en) * | 2018-08-22 | 2018-12-18 | 中国北方车辆研究所 | A kind of distance caging device for vehicle |
| CN110667543A (en) * | 2019-10-28 | 2020-01-10 | 吉林大学 | Brake pedal feeling simulation device and method for driving habit classification |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108874024A (en) * | 2017-05-16 | 2018-11-23 | 上海朝辉压力仪器有限公司 | Pedal controls transmitter |
| CN108874024B (en) * | 2017-05-16 | 2023-12-26 | 上海朝辉压力仪器有限公司 | pedal control transmitter |
| CN107170346A (en) * | 2017-05-24 | 2017-09-15 | 李伟男 | A kind of braking pedal and sense simulator for driving simulator |
| CN107270807A (en) * | 2017-07-12 | 2017-10-20 | 杨志超 | A kind of vehicle brake footrest amplitude shows system |
| CN107600056A (en) * | 2017-09-20 | 2018-01-19 | 吉林大学 | A kind of pedal sense simulation and climb displacement device applied to driving simulator |
| CN107600056B (en) * | 2017-09-20 | 2023-08-25 | 吉林大学 | Pedal feeling simulation and travel calculation device applied to driving simulator |
| CN107591053A (en) * | 2017-10-18 | 2018-01-16 | 吉林大学 | A kind of steering feel simulation and climb displacement device applied to driving simulator |
| CN108127561A (en) * | 2017-12-19 | 2018-06-08 | 苏州锃道研磨技术有限公司 | It is a kind of to power off the retainable absolute position measure and control device of data and its investigating method |
| CN109017722A (en) * | 2018-08-22 | 2018-12-18 | 中国北方车辆研究所 | A kind of distance caging device for vehicle |
| CN110667543A (en) * | 2019-10-28 | 2020-01-10 | 吉林大学 | Brake pedal feeling simulation device and method for driving habit classification |
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|---|---|
| CN106643456B (en) | 2019-04-16 |
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Inventor after: Zhu Bing Inventor after: Li Weinan Inventor after: Zhao Jian Inventor after: Liu Zhipeng Inventor after: Zhao Yiyan Inventor after: Zhang Ye Inventor after: Zhang Mingxing Inventor after: Zhang Bing Inventor before: Li Weinan Inventor before: Zhu Bing Inventor before: Zhao Jian Inventor before: Liu Zhipeng Inventor before: Zhao Yiyan Inventor before: Zhang Ye Inventor before: Zhang Mingxing Inventor before: Zhang Bing Inventor before: Ning Ken |
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