CN115126807A - Intelligent early warning system for brake friction plate abrasion - Google Patents
Intelligent early warning system for brake friction plate abrasion Download PDFInfo
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- CN115126807A CN115126807A CN202210897885.4A CN202210897885A CN115126807A CN 115126807 A CN115126807 A CN 115126807A CN 202210897885 A CN202210897885 A CN 202210897885A CN 115126807 A CN115126807 A CN 115126807A
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- 238000005299 abrasion Methods 0.000 title claims abstract description 55
- 230000001133 acceleration Effects 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims abstract description 13
- 238000012937 correction Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000013459 approach Methods 0.000 abstract description 3
- 239000002184 metal Substances 0.000 description 4
- 239000000523 sample Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D66/02—Apparatus for indicating wear
- F16D66/021—Apparatus for indicating wear using electrical detection or indication means
- F16D66/026—Apparatus for indicating wear using electrical detection or indication means indicating different degrees of lining wear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D66/02—Apparatus for indicating wear
- F16D66/021—Apparatus for indicating wear using electrical detection or indication means
- F16D66/026—Apparatus for indicating wear using electrical detection or indication means indicating different degrees of lining wear
- F16D66/027—Sensors therefor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses an intelligent early warning system for brake friction plate abrasion, which structurally comprises an ECU control module, an automobile communication CAN network, a brake friction pair, an automobile acceleration sensor, a brake master cylinder pressure sensor and an automobile display instrument, wherein the ECU control module unit is mainly used for receiving sensor signals, calculating the abrasion loss of the friction plate, judging the abrasion limit position and sending a prompt alarm to the automobile instrument. The invention can monitor the service state of the friction plate in real time by compiling the total wear amount of the friction plate which can be used in the control program in advance and based on the accumulated sum of the wear amount of the friction plate during braking in the use process of the vehicle, and can prompt a driver to check and replace the friction plate through the automobile instrument or large screen warning information when the wear limit position is about to approach, thereby ensuring that the brake is always in a safe and efficient working state.
Description
Technical Field
The invention relates to the technical field of vehicle intelligent control, in particular to an intelligent early warning system for abrasion of a brake friction plate.
Background
When the automobile needs to be decelerated or stopped, the automobile motion mechanical energy is converted into heat energy mainly through the mutual motion of a brake disc and a friction plate on a wheel, and the robustness and reliability of a vehicle brake system are important guarantee for the safe running of the automobile. Brake pads are therefore a critical item of inspection for routine service and maintenance, often requiring timely replacement when the pads wear to extreme positions.
At present, a friction plate wear limit alarm on an automobile is usually provided with a metal sheet at a friction plate limit position, and when the friction plate is worn to the metal position, the metal sheet can be in physical contact with a brake disc and generate friction noise to remind a driver. Another way is to embed a conducting wire in the friction plate, and when the friction plate is worn to the limit, the conducting wire is broken, so that the whole circuit generates an abrupt electrical signal to trigger the prompt or alarm. In addition, optical structures such as a camera are arranged on the brake shoe or the brake block, and the abrasion of the friction plate is detected through the probe.
The method is a mechanical structure passive monitoring and alarming method, if the friction plate is used for alarming at the extreme position and is not replaced in a place in the long-distance driving process, the potential safety hazard of brake performance attenuation can exist, psychological tension and worry of drivers and passengers are caused, the driver cannot know the limit position close to the friction plate in advance and the service life mileage is predicted, and in order to better solve the traditional passive use experience, the invention provides an intelligent monitoring and early-warning system.
Disclosure of Invention
The invention aims to provide an intelligent early warning system for brake friction plate abrasion, which solves the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the intelligent early warning system for the abrasion of the brake friction plate comprises an ECU (electronic control unit) control module unit, an automobile communication CAN (controller area network), a brake friction pair, a vehicle acceleration sensor, a brake master cylinder pressure sensor and an automobile display instrument, wherein the ECU control module unit is mainly used for receiving a sensor signal, calculating the abrasion amount of the friction plate, judging the abrasion limit position and sending a prompt alarm to the automobile instrument;
the automobile communication CAN network is mainly used for message communication transmission among all control modules on the automobile;
the brake friction pair comprises a friction plate and a brake shoe or a brake block;
the vehicle acceleration sensor or the brake master cylinder pressure sensor is mainly used for acquiring vehicle state signals, sending the vehicle state signals to a communication CAN network and reading and using the vehicle state signals for a control module ECU;
the automobile display instrument is mainly used for displaying the real-time use state of the friction plate and displaying an alarm prompt for a driver.
As a preferred embodiment of the present invention, the algorithm of the intelligent early warning system for friction plate wear is as follows: using the principle of clock counting, i.e. the total wear loss (f) of the friction linings when they are worn to extreme positions General assembly ) Equal to the sum of the wear amounts (deltaf) of the friction plates during each braking of the vehicle.
As a preferred embodiment of the present invention, the algorithm of the intelligent early warning system for friction plate wear specifically comprises the following working principles and working processes:
s1, after the friction plate of the vehicle is designed and developed to form a real object sample, the total abrasion loss f of the friction plate from the initial position to the limit position is obtained through the bench test General assembly W (unit may be energy or wear), and f General assembly Writing W into an ECU (electronic control unit) as an alarm threshold;
s2, the friction plate is installed on the whole vehicle, different brake working condition calibration is carried out on the abrasion loss of the friction plate, and the abrasion loss delta f (measuring unit and f) of the vehicle in different brake deceleration a in unit time delta t is obtained General assembly Keeping the same), and fitting a relation curve of delta f and the vehicle deceleration a;
s3, writing a friction plate abrasion calculation formula in the single braking process in the ECU control module unit:
wherein a is collected by a vehicle acceleration sensor and transmitted to an ECU control module unit, and when brakingTime t is the time of subtracting the ABS starting action, and the acceleration change curve a ═ f (t);
s4, writing a friction plate abrasion consumption summation formula in the ECU control module unit: f. of n Total of f 1 +f 2 +f 3 +…+f n Accumulating the abrasion loss of the friction plate in each braking process of the vehicle, and displaying information of the abrasion state of the friction plate on a vehicle display instrument at the moment;
s5, writing alarm decision logic R ═ f in ECU control module unit n Total W, vehicle comparison f after each braking n Size of the sum W: when R is less than 0, the friction plate does not reach the limit position, and when R is more than or equal to 0, the friction plate is shown to reach the limit value and accords with the alarm condition;
and S6, when the ECU control module judges that the alarm condition is met, the ECU control module sends alarm prompt information to a vehicle display instrument, and the vehicle display instrument reminds a driver to overhaul the friction plate through fault lamps or prompt characters and the like, so that an active early warning effect is achieved.
In a preferred embodiment of the present invention, the basic principle of the correction algorithm for estimating the wear amount of the friction plates from the master cylinder pressure signal of the master cylinder pressure sensor is the same as that of the algorithm based on the acceleration a.
As a preferred embodiment of the invention, the basic principle and the algorithm based on the acceleration a are that abrasion loss delta f 'of different brake master cylinder pressures P in unit time delta t is obtained through actual calibration of a whole vehicle, and a relation curve of the delta f' and the master cylinder pressure P is fitted.
In a preferred embodiment of the invention, the correction algorithm for estimating the wear loss of the friction plates by the master cylinder pressure signal calculates the wear loss of the friction plates during the time from each brake pedal depression to brake pedal release and accumulates the total wear loss f' n And (4) totaling.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention can monitor the service state of the friction plate in real time by compiling the total wear amount of the friction plate which can be used in the control program in advance and based on the accumulated sum of the wear amount of the friction plate during braking in the use process of the vehicle, and can prompt a driver to check and replace the friction plate through the automobile instrument or large screen warning information when the wear limit position is about to approach, thereby ensuring that the brake is always in a safe and efficient working state.
2. The early warning system can be integrated to a certain control module on the vehicle, and physical structures such as a metal sheet, a lead or a camera can be omitted, so that the purposes of optimizing the structure and reducing the material cost are achieved, and the development trend of the intelligent technology of the vehicle is better met.
3. The invention enhances the reliability of the system by correcting the abrasion loss calculation by the pressure of the brake master cylinder and a double control method.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a block diagram of an intelligent early warning system for brake friction plate wear according to the present invention;
FIG. 2 is a flow chart of an algorithm of the intelligent early warning system for brake friction plate wear of the present invention;
FIG. 3 is a diagram of a fitted curve of the present invention Δ f versus vehicle deceleration a;
FIG. 4 is a graph showing the fitting curve of Δ f' to the master cylinder pressure P according to the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-4, the present invention provides a technical solution: the intelligent early warning system for the abrasion of the brake friction plate comprises an ECU (electronic control unit) control module unit, an automobile communication CAN (controller area network), a brake friction pair, a vehicle acceleration sensor, a brake master cylinder pressure sensor and an automobile display instrument, wherein the ECU control module unit is mainly used for receiving a sensor signal, calculating the abrasion amount of the friction plate, judging the abrasion limit position and sending a prompt alarm to the automobile instrument;
the automobile communication CAN network is mainly used for message communication transmission among all control modules on the automobile;
the brake friction pair comprises a friction plate and a brake shoe or a brake block;
the vehicle acceleration sensor or the brake master cylinder pressure sensor is mainly used for acquiring vehicle state signals, sending the vehicle state signals to a communication CAN network and reading and using the vehicle state signals for a control module ECU;
the automobile display instrument is mainly used for displaying the real-time use state of the friction plate and displaying an alarm prompt for a driver.
According to the invention, the total wear amount of the friction plate which can be used is compiled in the control program in advance, based on the accumulated sum of the wear amount of the friction plate during braking in the use process of the vehicle, the use state of the friction plate can be monitored in real time, and when the wear limit position is about to approach, a driver can be prompted to check and replace the friction plate through the automobile instrument or large screen warning information, so that the brake is always in a safe and efficient working state.
In an alternative embodiment, the algorithm of the intelligent early warning system for the wear of the friction plate is as follows: using the principle of clock counting, i.e. the total wear loss (f) of the friction linings when they are worn to extreme positions General assembly ) Equal to the sum of the wear amounts (deltaf) of the friction plates during each braking of the vehicle.
In an optional embodiment, the specific working principle and working process of the algorithm of the intelligent early warning system for friction plate wear are as follows:
s1, after the friction plate of the vehicle is designed and developed to form a real object sample, the total abrasion loss f of the friction plate from the initial position to the limit position is obtained through the bench test General assembly W (unit may be energy or wear), and f General assembly Writing W into an ECU (electronic control unit) as an alarm threshold;
s2, the friction plate is installed on the whole vehicle, different brake working condition calibration is carried out on the abrasion loss of the friction plate, and the abrasion loss delta f (measuring unit and f) of the vehicle in different brake deceleration a in unit time delta t is obtained General (1) Remain the same) and fit Δ f to the carThe relationship curve of the vehicle deceleration a;
s3, writing a friction plate abrasion amount calculation formula in the single braking process in the ECU control module unit:
the system comprises an ECU (electronic control unit) control module unit, an acceleration sensor, a braking time t, an acceleration change curve a, f (t), a braking time t and an ABS (anti-lock braking system) starting action subtraction time, wherein the acceleration change curve a is acquired by the vehicle acceleration sensor and transmitted to the ECU control module unit;
s4, writing a friction plate abrasion consumption summation formula in the ECU control module unit: f. of n Total of f 1 +f 2 +f 3 +…+f n Accumulating the abrasion loss of the friction plate in each braking process of the vehicle, and displaying information of the abrasion state of the friction plate on a vehicle display instrument at the moment;
s5, writing alarm decision logic R ═ f in ECU control module unit n Total W, vehicle comparison f after each braking n Size of the sum W: when R is less than 0, the friction plate does not reach the limit position, and when R is more than or equal to 0, the friction plate is shown to reach the limit value and accords with the alarm condition;
and S6, when the ECU control module judges that the alarm condition is met, the ECU control module sends alarm prompt information to a vehicle display instrument, and the vehicle display instrument reminds a driver to overhaul the friction plate through fault lamps or prompt characters and the like, so that an active early warning effect is achieved.
In an alternative embodiment, the brake master cylinder pressure signal of the brake master cylinder pressure sensor is a modified algorithm for estimating the amount of friction plate wear, the basic principle being the same as the algorithm based on the acceleration a.
In an optional embodiment, the basic principle and the algorithm based on the acceleration a are that the abrasion loss delta f 'of different brake master cylinder pressures P in unit time delta t is obtained through actual calibration of the whole vehicle, and a relation curve of the delta f' and the master cylinder pressure P is fitted.
In an alternative embodiment, the correction algorithm for estimating the friction plate abrasion amount by the pressure signal of the brake master cylinder calculates the abrasion amount of the brake friction plate during the time from each brake pedal depression to brake pedal release and accumulates the abrasion amountTotal of f' n And (4) summarizing.
While there have been shown and described what are at present considered to be the basic principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The utility model provides a brake friction disc wearing and tearing intelligence early warning system, includes ECU control module unit, car communication CAN network, braking friction pair, vehicle acceleration sensor, brake master cylinder pressure sensor, car display instrument, its characterized in that: the ECU control module unit is mainly used for receiving sensor signals, calculating the abrasion loss of the friction plate, judging the abrasion limit position and sending a prompt alarm to an automobile instrument;
the automobile communication CAN network is mainly used for message communication transmission among all control modules on the automobile;
the brake friction pair comprises a friction plate and a brake shoe or a brake block;
the vehicle acceleration sensor or the brake master cylinder pressure sensor is mainly used for acquiring vehicle state signals, sending the vehicle state signals to a communication CAN network and reading and using the vehicle state signals for a control module ECU;
the automobile display instrument is mainly used for displaying the real-time use state of the friction plate and displaying an alarm prompt for a driver.
2. The intelligent early warning system for the abrasion of the brake friction plate according to claim 1, characterized in that: the algorithm of the intelligent early warning system for friction plate abrasion is as follows: using the principle of clock counting, i.e. the total wear loss (f) of the friction linings when they are worn to extreme positions General assembly ) Equal to the sum of the wear amounts (deltaf) of the friction plates during each braking of the vehicle.
3. The intelligent early warning system for the abrasion of the brake friction plate according to claim 2, characterized in that: the algorithm of the intelligent early warning system for the abrasion of the friction plate comprises the following specific working principle and working process:
s1, after the friction plate of the vehicle is designed and developed to form a real object sample, the total abrasion loss f of the friction plate from the initial position to the limit position is obtained through the bench test General assembly W (unit may be energy or wear), and f General assembly Writing W into an ECU (electronic control unit) as an alarm threshold;
s2, the friction plate is arranged on the whole vehicle, different brake working conditions are calibrated for the abrasion loss of the friction plate, and the abrasion loss delta f (measuring unit and f) of the vehicle in unit time delta t at different brake deceleration a is obtained General assembly Keeping the same), and fitting a relation curve of delta f and the vehicle deceleration a;
s3, writing a friction plate abrasion amount calculation formula in the single braking process in the ECU control module unit:
the system comprises an ECU (electronic control unit) control module unit, an acceleration sensor, a braking time t, an acceleration change curve a, f (t), a braking time t and an ABS (anti-lock braking system) starting action subtraction time, wherein the acceleration change curve a is acquired by the vehicle acceleration sensor and transmitted to the ECU control module unit;
s4, writing a friction plate abrasion consumption summation formula in the ECU control module unit: f. of n Total of f 1 +f 2 +f 3 +…+f n Accumulating each vehicleThe abrasion amount of the friction plate in the primary braking process can realize the information display of the abrasion state of the friction plate on a vehicle display instrument;
s5, writing alarm decision logic R ═ f in ECU control module unit n Total W, vehicle comparison f after each braking n Size of the sum W: when R is less than 0, the friction plate does not reach the limit position, and when R is more than or equal to 0, the friction plate is shown to reach the limit value and accords with the alarm condition;
s6, when the ECU control module judges that the alarm condition is met, alarm prompt information is sent to a vehicle display instrument, and the vehicle display instrument reminds a driver to overhaul the friction plate through fault lamps or prompt characters and the like, so that an active early warning effect is achieved.
4. The intelligent early warning system for the abrasion of the brake friction plate according to claim 1, characterized in that: the basic principle of the correction algorithm for estimating the friction plate abrasion loss by the brake master cylinder pressure signal of the brake master cylinder pressure sensor is the same as that of the algorithm based on the acceleration a.
5. The intelligent early warning system for the abrasion of the brake friction plate as claimed in claim 4, wherein: the basic principle and the algorithm based on the acceleration a are that the abrasion loss delta f 'of different brake master cylinder pressures P in unit time delta t is obtained through actual calibration of a whole vehicle, and a relation curve of the delta f' and the master cylinder pressures P is fitted.
6. The intelligent early warning system for the abrasion of the brake friction plate according to claim 1, characterized in that: the correction algorithm for estimating the friction plate abrasion loss through the brake master cylinder pressure signal calculates the abrasion loss of the brake friction plate and accumulates the total f 'of the abrasion losses in the process from the step-on of the brake pedal to the release of the brake pedal each time' n And (4) summarizing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210897885.4A CN115126807A (en) | 2022-07-28 | 2022-07-28 | Intelligent early warning system for brake friction plate abrasion |
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| CN202210897885.4A CN115126807A (en) | 2022-07-28 | 2022-07-28 | Intelligent early warning system for brake friction plate abrasion |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117450992A (en) * | 2023-09-21 | 2024-01-26 | 中国海洋工程研究院(青岛) | Gesture and wear monitoring and early warning method and system |
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| US20150240895A1 (en) * | 2014-02-25 | 2015-08-27 | Hyundai Motors Company | System for abrasion warning of brake friction pad using esc system |
| CN110578765A (en) * | 2019-09-19 | 2019-12-17 | 江西精骏电控技术有限公司 | method for detecting abrasion degree of brake pad of electric automobile |
| DE102018218567A1 (en) * | 2018-10-30 | 2020-04-30 | Continental Teves Ag & Co. Ohg | Method for determining the wear of a brake pad of a wheel brake and hydraulic brake system |
| CN113942485A (en) * | 2020-07-17 | 2022-01-18 | 丰田自动车株式会社 | Brake pad state estimation device and brake pad state estimation method |
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- 2022-07-28 CN CN202210897885.4A patent/CN115126807A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2012240646A (en) * | 2011-05-24 | 2012-12-10 | Toyota Motor Corp | Driving device and driving control method |
| US20150240895A1 (en) * | 2014-02-25 | 2015-08-27 | Hyundai Motors Company | System for abrasion warning of brake friction pad using esc system |
| DE102018218567A1 (en) * | 2018-10-30 | 2020-04-30 | Continental Teves Ag & Co. Ohg | Method for determining the wear of a brake pad of a wheel brake and hydraulic brake system |
| CN110578765A (en) * | 2019-09-19 | 2019-12-17 | 江西精骏电控技术有限公司 | method for detecting abrasion degree of brake pad of electric automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117450992A (en) * | 2023-09-21 | 2024-01-26 | 中国海洋工程研究院(青岛) | Gesture and wear monitoring and early warning method and system |
| CN117450992B (en) * | 2023-09-21 | 2024-05-03 | 中国海洋工程研究院(青岛) | Gesture and wear monitoring and early warning method and system |
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