CN109895841A - The method for assessing belt drive unit health status in electric boosting steering system - Google Patents
The method for assessing belt drive unit health status in electric boosting steering system Download PDFInfo
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- CN109895841A CN109895841A CN201711284264.4A CN201711284264A CN109895841A CN 109895841 A CN109895841 A CN 109895841A CN 201711284264 A CN201711284264 A CN 201711284264A CN 109895841 A CN109895841 A CN 109895841A
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- steering system
- health status
- electric boosting
- slip teeth
- boosting steering
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Abstract
The present invention provides a kind of methods of belt drive unit health status in assessment electric boosting steering system.Its frequency occurred with generated slip teeth phenomenon and slip teeth phenomenon in detecting electric boosting steering system, or even consider the power output of motor, to judge belt drive unit health status.Whereby, the user is allowed to understand the belt drive unit health status of electric boosting steering system really.
Description
Technical field
The present invention relates to belts in assessment electric boosting steering system more particularly to a kind of assessment electric boosting steering system
The method of transmission device health status.
Background technique
With the development of auto technology and the development of environmental consciousness, automobile is gradually taken using electric boosting steering system
For traditional hydraulic power-assist steering system, reason is:
1, when engine operates, hydraulic pumping is constantly in working condition and consumes and draw traditional hydraulic power-assist steering system
The partial power held up, so that entire engine oilconsumption increases.Electric boosting steering system is reviewed, is using battery as the energy
Source is consumed independently of engine running without increasing the power of engine, and furthermore working efficiency is saved compared with hydraulic power-assist steering system height
Fuel consumption.
2, electric boosting steering system may be integrally incorporated on same device, increase the convenience of assembly and maintenance.Hydraulic booster
It turns to then by the component Configuration of different function in different places, steering assistance function is generated by pipeline configuration.
3, electric boosting steering system does not have the hydraulic oil replacement problem of hydraulic power-assist steering system, more friendly for environment
It is kind.
4, electric boosting steering system can be improved by software control for different driving situation adjustment auxiliary strength
The stability and comfort of automobile operation.Hydraulic power-assist steering system is then to maintain fixed auxiliary strength, is unable to following vehicle shape
Condition changes auxiliary strength.
For electric boosting steering system, tubing string booster type electric servo steering system (Column- can be divided into
Type EPS), pinion gear booster type electric servo steering system (Pinion-Type EPS) and rack gear booster type electric power-assisted
Steering system (Rack-Type EPS).
For rack gear booster type electric servo steering system (Rack-Type EPS), function mode is to use
After person's steering wheel rotation, drives gear to engage the section of rack of bogie by steering column, drive bogie mobile, herein together
When, the torque sensor being installed on steering column can transmit information to electronic control unit, then be controlled by an electronic control unit
Motor drives belt after driving wheel to drive, and is rotated by the follower that belt driving is set in outside nut and nut is driven to revolve
Turn, then mobile by the screw portion on nut driving bogie, and generates the effect of providing steering assistance strength for user.
In the electric boosting steering system of such pattern, when selecting belt, belt parameter and mounting means can be passed through
Generally the highest upper torque limit that belt can be born under differential tension is learnt, but the tension of belt after long-term use may
Because the loosening of mechanism and belt, deformation or aging make the reduction of its tension, order, which can bear upper torque limit, to be reduced and then causes
Rotation between driving wheel, belt or follower is inconsistent and slip teeth phenomenon occurs.In this way, which slip teeth phenomenon represents belt biography
The aging of dynamic device, it will make electric boosting steering system generate auxiliary strength insufficient, or generate use when belt fracture
Person loses the case where auxiliary strength suddenly and then occurs to drive a vehicle dangerous when turning to.Therefore, the assessment for how passing through slip teeth phenomenon, comes
User is allowed to understand the health status of electric boosting steering system belt drive unit really, it appears to be even more important.
For the health status pointer (State of Health, SOH) of electric boosting steering system, has the U.S.
US8634986A1 patent proposes that main technical content has following steps: it is automatic to calculate first tire by dynamic model
Aligning torque.It is slitted by state estimation and obtains second tire self-aligning torque.Calculate first tire self-aligning torque
With the difference between second tire self-aligning torque.One is calculated between 0 to 1 health by lasting this difference of observation
State index.And controlling behavior is determined according to this health status index.It is comprising entire electronic with the method index that secures good health
The state of assist steering system can not individually inquire into the health status of each component, also just can not individually learn the strong of drive belt
Health state avoids belt from being broken the influence caused by driver suddenly in advance.
In addition there are the propositions of WO2017061257 A1 patent, provide coping style when angular transducer failure, and
It is provided simultaneously with the diagnosis of system exception.However the unusual condition occurred suddenly can only be detected, it still can not understand electronic auxiliary and turn
To the health status of system.
Summary of the invention
The main purpose of the present invention is to provide belt drive unit health shapes in a kind of assessment electric boosting steering system
The method of state allows user that can understand belt transmission dress in electric boosting steering system really by the assessment of slip teeth phenomenon
The health status set reduces the risk for encountering electric boosting steering system failure.
Therefore, according to the present invention provided by belt drive unit health status in a kind of assessment electric boosting steering system
Method, be used in an electric boosting steering system, which includes a steering mechanism, have one
A shell and a bogie, the shell have one first opening and one second opening；The bogie is arranged in the shell
And it is pierced by first opening and second opening respectively, which has a tooth-strip part and a threaded shank；One tooth
Wheel, affixed steering column, and engage the tooth-strip part；One nut, be spirally connected the threaded shank in the shell；One motor,
The affixed shell, the motor have at least one rotor and an output shaft, which drives the output shaft to rotate；One active
Take turns the affixed output shaft；One follower is set in the nut；One belt, is set in the driving wheel and the follower；This is commented
The method for estimating belt drive unit health status in electric boosting steering system also comprises the steps of information measurement: using one
A first sensor measures the rotation at the steering column each running time point, generates one first metrical information；Use one
The rotation of the two sensor measurements rotor each time point generates second metrical information；Information judging: an electronics is used
Control unit (ECU) reads first metrical information and second metrical information；A number is stored in advance in the electronic control unit
According to database, the data database store the rotor correspond to the mutual rotation relation of the turning machine column and respectively judge according to
According to；The judgement of slip teeth state: the electronic control unit uses first metrical information/second metrical information, cooperates the data number
According to the rotation relation in library, a comparison information is generated；The electronic control unit compares second metrical information/first survey
Information and the comparison information are measured, if difference determines normal less than a threshold value between the rwo；If differing by more than between the two
The threshold value then determines to generate slip teeth phenomenon.
Whereby, when slip teeth phenomenon occurs, the belt drive unit health status decline of electric boosting steering system is represented, it can
To remind user in advance, the risk for encountering electric boosting steering system failure is reduced.
Wherein, first metrical information and second metrical information are one of rotational angle, angular speed, angular acceleration
Or combinations thereof.
In addition, determining after generating slip teeth phenomenon, which generates a warning message, quilt in step c)
Apply to issue warning to alert user.
It is noted that there are one step d) health status to judge: the electronic control unit records slip teeth phenomenon hair
Raw time point, and judge in a preset period, if slip teeth phenomenon occurrence frequency is less than by being stored in advance in
One threshold frequency of the electronic control unit, then determine the state of alert；If slip teeth phenomenon occurrence frequency is greater than the threshold frequency,
Then determine precarious position.Similarly, in step d), after determining precarious position, which generates a warning letter
Breath is employed for issuing warning to alert user.
Or in step d), one is also used to be located at the torsion sensor measurement driver power output turned on column or go back
It is contributed using a current sensor assessment motor, output one goes out force signal to the electronic control unit；Setting one is higher by
Power condition is greater than the high output condition when this goes out power generating value that force signal represents, is then defined as high output state；If slip teeth phenomenon
There is no being defined as normal condition；If slip teeth phenomenon occurs under non-high output state, it is defined as precarious position；If in height
Slip teeth phenomenon occurs for power output state but occurrence frequency is less than the threshold frequency, determines the state of alert；If occurring in high output state
Slip teeth phenomenon and occurrence frequency are greater than the threshold frequency, then are determined as precarious position.So can more meticulously it divide using feelings
Condition, closer to user's demand.
Detailed description of the invention
Fig. 1 is the perspective view of the first preferred embodiment of the invention, shows electric boosting steering system.
Fig. 2 is the diagrammatic cross-section of the first preferred embodiment of the invention, shows electric boosting steering system.
Fig. 3 is the partial perspective view of the first preferred embodiment of the invention, shows electric boosting steering system.
Fig. 4 is the system schematic of the first preferred embodiment of the invention, shows electric boosting steering system.
Fig. 5 is the flow diagram of the first preferred embodiment of the invention, belt in display assessment electric boosting steering system
The method of transmission device health status.
Fig. 6 is the flow diagram of the second preferred embodiment of the invention, belt in display assessment electric boosting steering system
The method of transmission device health status.
Fig. 7 is the flow diagram of another program of the second preferred embodiment of the invention, wherein increases high output state
Rule of judgment.
[symbol description]
10 electric boosting steering system, 11 steering mechanism (pinion steering mechanism)
111 shell 111a first opening
111b second is open 112 bogies (steering rack)
112a tooth-strip part (toothed portion) 112b threaded shank (screwed portion)
12 gears (pinion) 121 turn to column (steering column)
13 nut, 14 motor
142 output shaft, 143 driving wheel
144 follower, 145 belt
15 first sensor, 16 second sensor
17 electronic control unit, 18 torsion sensor
19 current sensor, 21 drag link (tie rod)
D data database
Specific embodiment
For the technical characterstic place that the present invention will be described in detail, now enumerates preferred embodiment below and cooperate Detailed description of the invention
As after, in which:
As shown in Figure 1 to Figure 3, provided by first preferred embodiment of the invention in a kind of assessment electric boosting steering system
The method of belt drive unit health status is used in an electric boosting steering system 10, the electric boosting steering system packet
Contain a nut 13 of gear 12, one of steering mechanism 11, one and a motor 14.
The steering mechanism 11 has a shell 111 and a bogie 112, which has one first opening
111a and one second opening 111b.The bogie 112 is arranged and is pierced by first opening 111a in the shell 111 and respectively
With second opening 111b, which has an a tooth-strip part 112a and threaded shank 112b.Connect the plural number of wheel
Drag link 21 is separately connected the bogie 112, and is driven by the bogie 112.
Gear 12, affixed one turns to column 121, and engages tooth-strip part 112a.The gear 12 will receive the steering column
121 drive rotation, and tooth-strip part 112a is driven to make the bogie 112 mobile.
The nut 13, the threaded shank that is spirally connected in the shell 111 112b.When the nut 13 rotation, the screw rod can be driven
Portion 112b is mobile.
The motor 14, the affixed shell 111, which has at least one rotor, and (this part is general technology, in figure
Do not show) He Yizhi output shaft 142.One driving wheel 143, the affixed output shaft 142.One follower 144 is set in the nut
13.And a belt 145, it is set in the driving wheel 143 and the follower 144.The rotor is allowed when the motor 14 is controlled
It drives output shaft 142 to rotate, the belt 145 can be driven to run by the driving wheel 143 power, then passed by the follower 144
It is delivered to the nut 13, and it is mobile to be able to drive threaded shank 112b.
Referring again to Fig. 1 to Fig. 5, the method for belt drive unit health status in the assessment electric boosting steering system
Also comprise the steps of
A) information measurement: measuring the rotation at the steering column 121 each running time point using a first sensor 15,
Generate one first metrical information.The rotation of the rotor each time point is measured using second sensor 16, generates one the
Two metrical informations.
B) information judging: using an electronic control unit 17 (Electronic Control Unit, ECU), and reading should
First metrical information and second metrical information.A data database D is stored in advance in the electronic control unit 17, the data number
The rotor, which is stored, according to library corresponds to the turning machine column 121 mutual rotation relations and each judgment basis.The rotation relation,
In the case where electric boosting steering system health, the rotation proportionate relationship between the rotor and the steering column 121.
For example, as shown in figure 4, working as 143 number N of teeth of driving wheelm, rotor rotational angle θm, 144 number N of teeth of followerbs、
13 rotational angle θ of nutbsWhen, because being driven by belt 145, there is following relationship
Nmθm=Nbsθbs
Also, follower 144 drives nut 13 to rotate, and 13 turnning circle of nut is solid at a distance from the movement of bogie 112
Certainty ratio relationship；And when the bogie 112 is mobile, which is also driven by the tooth-strip part 112a of the bogie 112
Rotation, 12 rotational angle θ of the gearswHave fixed proportion relationship (line angle transmission ratio) with the bogie moving distance, and the gear
12 rotational angles are equal to steering column rotational angle θsw
Bogie moving distance (mm)=line angle transmission ratio (mm/deg) * θsw(deg)
If 143 number N of teeth of driving wheelm=48；144 number N of teeth of followerbs=148；When 13 three-sixth turn of nut, bogie
112 mobile 8mm；When 12 three-sixth turn of gear, the mobile 48.68mm of bogie 112 is deduced by above-mentioned relation
Driving wheel 143 and rotor turn θmWhen spending, nut turns 0.3243 θmDegree
θbs(deg)=0.3243 θm(deg)
Nut turns 0.3243 θmThe mobile 7.207*10 of degree, bogie 112 and tooth-strip part 112a-3θm(mm)
112 tooth-strip part 112a of bogie moves 7.207*10-3θm(mm), then the gear 12 and the steering column rotational angle
θswFor 0.0533 θm(deg)
θsw(deg)=0.0533 θm(deg) it is rotation proportionate relationship between the rotor and the steering column 121.
C) slip teeth state judges: the electronic control unit 17 uses first metrical information/second metrical information, cooperation
The rotation relation in data database D generates a comparison information, in the present embodiment by taking the second metrical information as an example,
The first metrical information can also be used.The electronic control unit 17 compares second metrical information/first metrical information and is somebody's turn to do
Comparison information then determines normal if difference is less than a threshold value, such as 10 between the rwo；If differing between the two
More than this threshold value, then determine to generate slip teeth phenomenon.
Whereby, when slip teeth phenomenon occurs, the belt 145, driving wheel 143 and follower of electric boosting steering system are represented
144 combination health status decline, can remind user in advance, reduce the risk for encountering electric boosting steering system failure.
It is noted that first metrical information and second metrical information are rotational angle, angular speed, angular acceleration
One of them or combinations thereof.
In addition, in the present embodiment, can choose in step c), determine after generating slip teeth phenomenon, the electronic control list
Member 17 generates a warning message, is employed for issuing warning to alert user, wherein the warning message is with text, sound
Or other means present.
Fig. 1 is please referred to 4 and Fig. 6, then a kind of assessment is electronic provided by introduction the second preferred embodiment of the invention helps
The method of belt drive unit health status in power steering system.The difference of itself and the first preferred embodiment is, there are one
The judgement of step d) health status: the electronic control unit 17 records the time point that slip teeth phenomenon occurs, and judges to set in advance
In a fixed period, such as 2 seconds, if slip teeth phenomenon occurrence frequency is less than one by being stored in advance in the electronic control unit
Threshold frequency (such as: 2 times/2 seconds), then determine the state of alert；If slip teeth phenomenon occurrence frequency is greater than the threshold frequency, determine
Precarious position.Similarly, in step d), after being determined as precarious position, which generates a warning message,
It is employed for issuing warning to alert user.It is noted that the result of health status judgement is to show different cressets
Mode reminds driver.
In addition to this, referring to Fig. 7, also can choose in step d), also it is located at using one and is turned on column 121
Torsion sensor 18 (torque sensor) measurement driver power output is also gone out using an assessment motor 14 of current sensor 19
Power, output one goes out force signal to the electronic control unit 17；A high output condition is set, when this goes out going out for force signal representative
Force value is greater than the high output condition, then is defined as high output state；If there is no being defined as normal condition to slip teeth phenomenon；If
Slip teeth phenomenon occurs under non-high output state, is defined as precarious position；If slip teeth phenomenon but generation occurs in high output state
Frequency is less than the threshold frequency, determines the state of alert；If slip teeth phenomenon occurs in high output state but occurrence frequency is greater than the door
Sill frequency, then be determined as precarious position.Service condition so can be more meticulously divided, closer to user's demand.
Claims (6)
1. the method for belt drive unit health status, it is electric boosted to be used in one in a kind of assessment electric boosting steering system
Steering system, the electric boosting steering system include a steering mechanism, have a shell and a bogie, the shell
With one first opening and one second opening；The bogie, be arranged be pierced by the shell and respectively first opening and
Second opening, the bogie have a tooth-strip part and a threaded shank；One gear, affixed steering column, and nibble
Close the tooth-strip part；One nut, be spirally connected the threaded shank in the shell；One motor, the affixed shell, the motor have at least
One rotor and an output shaft, the rotor drive the output shaft to rotate；The affixed output shaft of one driving wheel；One follower
It is set in the nut；One belt, is set in the driving wheel and the follower；Belt passes in the assessment electric boosting steering system
The method of dynamic device health status is characterized in that comprising the steps of
A) information measurement: the rotation at the steering column each running time point is measured using a first sensor, generates one the
One metrical information；The rotation of the rotor each time point is measured using a second sensor, generates second metrical information；
B) information judging: an electronic control unit is used, first metrical information and second metrical information are read；The electronics
A data database is stored in advance in control unit, which stores the rotor and correspond to mutual one, the turning machine column
Rotation relation and each judgment basis；
C) slip teeth state judges: the electronic control unit uses first metrical information/second metrical information, cooperates the data
The rotation relation in database generates a comparison information；The electronic control unit compare second metrical information/this first
Metrical information and the comparison information, if difference determines normal less than a threshold value between the rwo；If difference is super between the two
The threshold value is crossed, then determines to generate slip teeth phenomenon.
2. the method for belt drive unit health status in assessment electric boosting steering system according to claim 1,
In: first metrical information and second metrical information are one of rotational angle, angular speed, angular acceleration or combinations thereof.
3. the method for belt drive unit health status in assessment electric boosting steering system according to claim 1,
In: in step c), determine after generating slip teeth phenomenon, which generates a warning message, is employed for issuing
Warning.
4. the method for belt drive unit health status in assessment electric boosting steering system according to claim 1,
In: there are one step d) health status to judge: the electronic control unit records the time point that slip teeth phenomenon occurs, and judges
In a preset period, if slip teeth phenomenon occurrence frequency is less than one by being stored in advance in the electronic control unit
Threshold frequency, then determine the state of alert；If slip teeth phenomenon occurrence frequency is greater than the threshold frequency, precarious position is determined.
5. the method for belt drive unit health status in assessment electric boosting steering system according to claim 4,
In: in step d), after determining precarious position, which generates a warning message, is employed for issuing warning.
6. the method for belt drive unit health status in assessment electric boosting steering system according to claim 4,
In: in step d), one is also used positioned at the torsion sensor measurement driver power output turned on column or also using one
Current sensor assesses motor power output, and output one goes out force signal to the electronic control unit；A high output condition is set, when
The power generating value for going out force signal representative is greater than the high output condition, then is defined as high output state；If slip teeth phenomenon there is no,
It is defined as normal condition；If slip teeth phenomenon occurs under non-high output state, it is defined as precarious position；If being sent out in high output state
Raw slip teeth phenomenon but occurrence frequency are less than the threshold frequency, the judgement state of alert；If high output state occur slip teeth phenomenon and
Occurrence frequency is greater than the threshold frequency, then is determined as precarious position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711284264.4A CN109895841B (en) | 2017-12-07 | 2017-12-07 | Method for evaluating health state of belt transmission device in electric power steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711284264.4A CN109895841B (en) | 2017-12-07 | 2017-12-07 | Method for evaluating health state of belt transmission device in electric power steering system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109895841A true CN109895841A (en) | 2019-06-18 |
| CN109895841B CN109895841B (en) | 2020-09-04 |
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ID=66939136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711284264.4A Active CN109895841B (en) | 2017-12-07 | 2017-12-07 | Method for evaluating health state of belt transmission device in electric power steering system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112455532A (en) * | 2019-09-06 | 2021-03-09 | 上银科技股份有限公司 | Electric power steering system and control method |
| CN112644611A (en) * | 2020-12-02 | 2021-04-13 | 深圳市概念智慧科技有限公司 | Bicycle alarm method, device, equipment and storage medium |
| WO2024159424A1 (en) * | 2023-01-31 | 2024-08-08 | 华为技术有限公司 | Health status assessment method and apparatus, and storage medium |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1784332A (en) * | 2003-05-06 | 2006-06-07 | 日本精工株式会社 | Belt speed reducer for electric power steering device and electric power steering device |
| JP2008105604A (en) * | 2006-10-26 | 2008-05-08 | Jtekt Corp | Electric power steering device |
| KR20090097625A (en) * | 2008-03-12 | 2009-09-16 | 주식회사 만도 | Rack-type electric power steering apparatus |
| JP2010101582A (en) * | 2008-10-24 | 2010-05-06 | Mitsubishi Heavy Ind Ltd | Refrigerator for transport |
| KR20110101437A (en) * | 2010-03-08 | 2011-09-16 | 유진테크주식회사 | Main shaft production method for electric power steering device |
| CN103085857A (en) * | 2011-11-03 | 2013-05-08 | 万都株式会社 | Rack assist type steering apparatus and rack assist type electric power steering apparatus having the same |
| KR20130053896A (en) * | 2011-11-16 | 2013-05-24 | 현대자동차주식회사 | Method for sensing the belt's slip of r-mdps |
| CN107010101A (en) * | 2015-10-29 | 2017-08-04 | 株式会社万都 | Electric power-assisted steering apparatus |
-
2017
- 2017-12-07 CN CN201711284264.4A patent/CN109895841B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1784332A (en) * | 2003-05-06 | 2006-06-07 | 日本精工株式会社 | Belt speed reducer for electric power steering device and electric power steering device |
| JP2008105604A (en) * | 2006-10-26 | 2008-05-08 | Jtekt Corp | Electric power steering device |
| KR20090097625A (en) * | 2008-03-12 | 2009-09-16 | 주식회사 만도 | Rack-type electric power steering apparatus |
| JP2010101582A (en) * | 2008-10-24 | 2010-05-06 | Mitsubishi Heavy Ind Ltd | Refrigerator for transport |
| KR20110101437A (en) * | 2010-03-08 | 2011-09-16 | 유진테크주식회사 | Main shaft production method for electric power steering device |
| CN103085857A (en) * | 2011-11-03 | 2013-05-08 | 万都株式会社 | Rack assist type steering apparatus and rack assist type electric power steering apparatus having the same |
| KR20130053896A (en) * | 2011-11-16 | 2013-05-24 | 현대자동차주식회사 | Method for sensing the belt's slip of r-mdps |
| CN107010101A (en) * | 2015-10-29 | 2017-08-04 | 株式会社万都 | Electric power-assisted steering apparatus |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112455532A (en) * | 2019-09-06 | 2021-03-09 | 上银科技股份有限公司 | Electric power steering system and control method |
| CN112455532B (en) * | 2019-09-06 | 2022-02-08 | 上银科技股份有限公司 | Electric power steering system and control method |
| CN112644611A (en) * | 2020-12-02 | 2021-04-13 | 深圳市概念智慧科技有限公司 | Bicycle alarm method, device, equipment and storage medium |
| WO2024159424A1 (en) * | 2023-01-31 | 2024-08-08 | 华为技术有限公司 | Health status assessment method and apparatus, and storage medium |
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|---|---|
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