CN114857190A - Brake pad wear detection system - Google Patents
Brake pad wear detection system Download PDFInfo
- Publication number
- CN114857190A CN114857190A CN202210589400.5A CN202210589400A CN114857190A CN 114857190 A CN114857190 A CN 114857190A CN 202210589400 A CN202210589400 A CN 202210589400A CN 114857190 A CN114857190 A CN 114857190A
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- Prior art keywords
- brake pad
- brake
- magnetic induction
- thickness
- detection system
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- 238000001514 detection method Methods 0.000 title claims abstract description 26
- 230000006698 induction Effects 0.000 claims abstract description 75
- 238000005070 sampling Methods 0.000 claims description 8
- 239000004065 semiconductor Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract description 7
- 230000000007 visual effect Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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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
- F16D66/028—Apparatus for indicating wear using electrical detection or indication means with non-electrical sensors or signal transmission, e.g. magnetic, optical
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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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- 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
- F16D2300/00—Special features for couplings or clutches
- F16D2300/18—Sensors; Details or arrangements thereof
-
- 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
- F16D2300/00—Special features for couplings or clutches
- F16D2300/20—Auxiliary indicators or alarms
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention provides a brake pad wear detection system which comprises a permanent magnet, a magnetic induction sensor, a data processor and a display, wherein the magnetic induction sensor and the display are in signal connection with the data processor; the permanent magnet is arranged between the first brake pad and the brake caliper, the magnetic induction sensor is arranged between the second brake pad and the brake caliper, and the permanent magnet is arranged opposite to the magnetic induction sensor; the data processor is used for acquiring the magnetic induction intensity output by the magnetic induction intensity sensor when the first brake pad and the second brake pad are in contact with the surface of the brake disc, and calculating the thickness of the first brake pad according to the magnetic induction intensity; the display is used for carrying out visual display on the thickness dimension of the first brake block when the thickness dimension of the first brake block is smaller than a first preset value. Because the brake pad abrasion detection system can accurately detect the thickness of the brake pad when the brake is performed every time, the safety of the brake system is greatly improved.
Description
Technical Field
The invention relates to the technical field of automobile brake detection, in particular to a brake pad abrasion detection system.
Background
With the continuous improvement of the living demand of people, the automobile becomes a common vehicle for people to go out. In the automobile, the brake pad is a vulnerable part, people need to check the abrasion condition of the brake pad to judge whether the brake pad needs to be replaced, and some drivers easily ignore checking the brake pad.
According to relevant data statistics, in recent years, traffic accidents with the third generation are caused by 'brake failure', wherein poor brake pads are the main cause of brake failure of automobiles. The life of the brake pad is difficult to define with a specific number of kilometers or time. Because the driving conditions of each person are different and the road conditions are different, the abrasion conditions of the brake pads are different greatly, some people may need to replace the brake pads when driving the vehicle for 3 to 4 kilometers, and some people do not need to replace the brake pads when driving the vehicle for 10 kilometers due to good driving habits and good vehicle maintenance.
Therefore, the abrasion condition of the brake pad is accurately acquired, and the brake pad can be timely reminded to a vehicle owner to replace the brake pad when the brake pad needs to be replaced, so that the problem to be solved urgently is solved.
Disclosure of Invention
The invention aims to provide a brake pad wear detection system, which is used for solving the problem that the brake pad wear condition cannot be conveniently obtained in the prior art.
In order to achieve the aim, the invention provides a brake pad wear detection system which comprises a permanent magnet, a magnetic induction sensor, a data processor and a display, wherein the magnetic induction sensor and the display are in signal connection with the data processor; wherein the content of the first and second substances,
the permanent magnet is arranged between the first brake pad and the brake caliper, the magnetic induction sensor is arranged between the second brake pad and the brake caliper, and the permanent magnet is arranged opposite to the magnetic induction sensor;
the data processor is used for acquiring the magnetic induction intensity output by the magnetic induction intensity sensor when the first brake pad and the second brake pad are both in contact with the surface of the brake disc, and calculating the thickness dimension of the first brake pad according to the magnetic induction intensity;
the display is used for carrying out visual display on the thickness dimension of the first brake pad when the thickness dimension of the first brake pad is smaller than a first preset value.
Further, the data processor calculates the thickness of the first brake pad according to the magnetic induction intensity, and specifically includes:
calculating the size of the space between the permanent magnet and the magnetic induction sensor according to the magnetic induction intensity;
subtracting the thickness of the brake disc from the distance to obtain the sum of the thickness of the first brake pad and the thickness of the second brake pad, wherein the thickness of the brake disc is a set value;
and calculating to obtain the thickness dimension of the first brake pad or the second brake pad on the assumption that the thickness of the first brake pad is the same as that of the second brake pad.
Further, the calculating the space size between the permanent magnet and the magnetic induction sensor according to the magnetic induction specifically includes:
and determining the space size corresponding to the magnetic induction intensity according to a preset magnetic induction intensity-space curve.
Further, the data processor comprises a sampling trigger port connected with a brake lamp loop of the vehicle in parallel, and when the sampling trigger port is at a high potential, the first brake pad and the second brake pad are both in surface contact with the brake disc.
Further, a first mounting groove and a second mounting groove corresponding to each other are formed in the brake caliper, and the permanent magnet and the magnetic induction sensor are mounted in the first mounting groove and the second mounting groove respectively.
Furthermore, the system also comprises an alarm which is in signal connection with the data processor;
the alarm is used for giving out a flash alarm when the thickness of the first brake pad is smaller than a second preset value; and the second preset value is less than or equal to the first preset value.
Further, the first preset value is 6 mm; the second preset value is 4 mm.
Further, the magnetic induction sensor adopts a linear hall sensor, a semiconductor magnetoresistor, a magnetodiode or a magnetotriode.
Further, the data processor is an arm microprocessor.
Further, the display is an LCD liquid crystal display.
According to the brake pad wear detection system provided by the invention, the data processor is used for acquiring the magnetic induction intensity output by the magnetic induction intensity sensor when the first brake pad and the second brake pad are both contacted with the surface of the brake disc, and calculating the thickness size of the first brake pad according to the magnetic induction intensity to obtain the brake pad wear degree.
According to the technical scheme provided by the invention, the brake pad abrasion detection system can accurately detect the thickness of the brake pad during each braking, so that the safety of the brake system is greatly improved. The user need not to look over the brake block, can conveniently learn the brake block wearing and tearing condition to in time change the brake block, improved the convenience of acquireing the brake block wearing and tearing condition, avoided appearing the driving safety hidden danger because of the thickness of brake block is too thin.
Drawings
FIG. 1 is a schematic view of an installation structure of a permanent magnet and a magnetic induction sensor of a brake pad wear detection system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a system of a brake pad wear detection system according to an embodiment of the present invention.
Detailed Description
The following describes in more detail embodiments of the present invention with reference to the schematic drawings. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is provided for the purpose of facilitating and clearly illustrating embodiments of the present invention.
As shown in fig. 1-2, the present invention provides a brake pad wear detection system, which comprises a permanent magnet 1, a magnetic induction sensor 2, a data processor and a display, wherein the magnetic induction sensor 2 and the display are connected with the data processor through signals. Wherein, permanent magnet 1 sets up between first brake block 3 and brake caliper 4, magnetic induction sensor 2 set up second brake block 5 with between the brake caliper 4, permanent magnet 1 with magnetic induction sensor 2 sets up relatively.
The magnetic induction sensor 2 is used for continuously measuring the magnetic induction of the permanent magnet 1 at the magnetic induction sensor 2.
It can be understood that, the distance between the magnetic induction sensor 2 and the permanent magnet 1 is different, and the measured magnetic induction intensity is also different, and the closer the distance between the magnetic induction sensor 2 and the permanent magnet 1 is, the larger the magnetic induction intensity measured by the magnetic induction sensor 2 is. Therefore, if the magnetism of the permanent magnet 1 is stable, the distance between the permanent magnet 1 and the magnetic induction sensor 2 can be determined correspondingly when the magnetic induction is known as long as the magnetic induction-distance curve between the permanent magnet 1 and the magnetic induction sensor 2 is measured and drawn. The magnetic induction sensor 2 converts the measured magnetic induction into an analog electric signal and outputs the analog electric signal.
In this embodiment, brake caliper 4 is last to have seted up corresponding first mounting groove 7 and second mounting groove 8, permanent magnet 1 and magnetic induction sensor 2 are installed respectively in first mounting groove 7 and the second mounting groove 8. The permanent magnet 1 and the magnetic induction sensor 2 can be mounted on the brake caliper 4 in an adhesion or screw fixation manner. In this embodiment, the magnetic induction sensor 2 may be a linear hall sensor, a semiconductor magnetoresistor, a magnetodiode, or a magnetotriode.
Data processor is used for gathering the magnetic induction that first brake block 3 and second brake block 5 all export with brake disc 6 surface contact time magnetic induction sensor 2, according to the magnetic induction calculates the thickness size of first brake block 3.
In this embodiment, after receiving the analog electrical signal output by the magnetic induction sensor 2, the data processor sequentially amplifies, filters, and a/D converts the analog electrical signal into a digital signal, and then processes the digital signal. The data processor is an arm microprocessor.
Optionally, the data processor comprises a sampling trigger port connected in parallel with a brake lamp loop of the vehicle, and when the sampling trigger port is at a high potential, both the first brake pad 3 and the second brake pad 5 are in surface contact with the brake disc 6. After a driver steps on a brake pedal, braking starts, the first brake block 3 and the second brake block 5 are in surface contact with the brake disc 6, the brake pedal can press a brake lamp switch contact to switch on a brake lamp loop, a brake lamp is on, and at the moment, the sampling trigger port is in a high potential. When the brake pedal is released, the contact of the brake lamp switch is disconnected, the brake lamp is turned off, and at the moment, the sampling trigger port is at a high potential.
Specifically, only when the first brake pad 3 and the second brake pad 5 are both in surface contact with the brake disc 6, there is no gap between the first brake pad 3, the brake disc 6 and the second brake pad 5, and the distance between the first brake pad 3 and the second brake pad 5 is the closest. Since the thickness dimension of the brake disc 6 can be measured in advance, and it can be considered that the thickness dimension of the brake disc 6 is unchanged or changed little in size during use of the vehicle, and can be ignored.
Then, in this embodiment, the calculating, by the data processor, the thickness dimension of the first brake pad 3 according to the magnetic induction includes:
and S100, calculating the size of the distance between the permanent magnet 1 and the magnetic induction sensor 2 according to the magnetic induction.
Because the magnetic induction-spacing curve of the permanent magnet is known, after the magnetic induction is obtained, the data processor can determine the spacing size corresponding to the magnetic induction according to a preset magnetic induction-spacing curve, namely the spacing size between the permanent magnet 1 and the magnetic induction sensor 2, namely the thickness size after the first brake pad 3, the brake disc 6 and the second brake pad 5 are overlapped.
And S200, subtracting the thickness of the brake disc 6 from the distance to obtain the sum of the thickness of the first brake pad 3 and the thickness of the second brake pad 5. Wherein, the thickness dimension of the brake disc 6 is a set value.
And S300, calculating to obtain the thickness size of the first brake pad 3 or the second brake pad 5 on the assumption that the thickness of the first brake pad 3 is the same as that of the second brake pad 5.
In the normal daily use of vehicle in-process, the wearing and tearing condition of first brake block 3 and second brake block 5 is roughly the same, and to the wearing and tearing detection precision of brake block reach millimeter level can, consequently, can think that the wearing and tearing condition of first brake block 3 and second brake block 5 is the same, and the remaining thickness of first brake block 3 and second brake block 5 is also the same promptly.
The display is used for carrying out visual display on the thickness dimension of the first brake pad 3 when the thickness dimension of the first brake pad 3 is smaller than a first preset value. The display may be an LCD liquid crystal display.
Optionally, the system may further include an alarm, and the alarm is in signal connection with the data processor. The alarm is used for giving out a flash alarm to remind a driver of paying attention and technically replacing the brake pad when the thickness of the first brake pad 3 is smaller than a second preset value; and the second preset value is less than or equal to the first preset value.
In this embodiment, the first preset value is 6 mm. The second preset value is 4mm, and when the thickness of the brake pad is smaller than 4mm, a new brake pad needs to be replaced in time.
In summary, according to the brake pad wear detection system provided by the invention, the data processor is configured to acquire the magnetic induction intensity output by the magnetic induction intensity sensor when the first brake pad and the second brake pad are both in contact with the surface of the brake disc, and calculate the thickness of the first brake pad according to the magnetic induction intensity to obtain the brake pad wear degree.
According to the technical scheme provided by the invention, the brake pad abrasion detection system can accurately detect the thickness of the brake pad during each braking, so that the safety of the brake system is greatly improved. The user need not to look over the brake block, can conveniently learn the brake block wearing and tearing condition to in time change the brake block, improved the convenience of acquireing the brake block wearing and tearing condition, avoided appearing the driving safety hidden danger because of the thickness of brake block is too thin.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A brake pad wear detection system characterized in that: the magnetic induction intensity sensor (2) and the display are in signal connection with the data processor; wherein the content of the first and second substances,
the permanent magnet (1) is arranged between the first brake pad (3) and the brake caliper (4), the magnetic induction sensor (2) is arranged between the second brake pad (5) and the brake caliper (4), and the permanent magnet (1) and the magnetic induction sensor (2) are arranged oppositely;
the data processor is used for acquiring the magnetic induction intensity output by the magnetic induction intensity sensor (2) when the first brake pad (3) and the second brake pad (5) are in surface contact with a brake disc (6), and calculating the thickness size of the first brake pad (3) according to the magnetic induction intensity;
the display is used for visually displaying the thickness dimension of the first brake pad (3) when the thickness dimension of the first brake pad (3) is smaller than a first preset value.
2. A brake pad wear detection system as claimed in claim 1, wherein: the data processor calculates the thickness of the first brake pad (3) according to the magnetic induction intensity, and specifically comprises the following steps:
calculating the size of the space between the permanent magnet (1) and the magnetic induction sensor (2) according to the magnetic induction;
subtracting the thickness of the brake disc (6) from the distance to obtain the sum of the thickness of the first brake pad (3) and the thickness of the second brake pad (5), wherein the thickness of the brake disc (6) is a set value;
and calculating the thickness dimension of the first brake pad (3) or the second brake pad (5) on the assumption that the thickness of the first brake pad (3) is the same as that of the second brake pad (5).
3. A brake pad wear detection system as claimed in claim 2, wherein: according to the magnetic induction intensity calculates the interval size between permanent magnet (1) and magnetic induction intensity sensor (2), specifically includes:
and determining the space size corresponding to the magnetic induction intensity according to a preset magnetic induction intensity-space curve.
4. A brake pad wear detection system as claimed in claim 1, wherein: the data processor comprises a sampling trigger port connected with a brake lamp loop of the vehicle in parallel, and when the sampling trigger port is at a high potential, the first brake pad (3) and the second brake pad (5) are in surface contact with the brake disc (6).
5. A brake pad wear detection system as claimed in claim 1, wherein: the brake caliper is characterized in that a first mounting groove (7) and a second mounting groove (8) corresponding to each other are formed in the brake caliper (4), and the permanent magnet (1) and the magnetic induction sensor (2) are respectively mounted in the first mounting groove (7) and the second mounting groove (8).
6. A brake pad wear detection system as claimed in claim 1, wherein: the system also comprises an alarm which is in signal connection with the data processor;
the alarm is used for giving out a flash alarm when the thickness of the first brake pad (3) is smaller than a second preset value; and the second preset value is less than or equal to the first preset value.
7. A brake pad wear detection system as claimed in claim 6, wherein: the first preset value is 6 mm; the second preset value is 4 mm.
8. A brake pad wear detection system as claimed in claim 1, wherein: the magnetic induction intensity sensor (2) adopts a linear Hall sensor, a semiconductor magnetoresistor, a magnetodiode or a magnetotriode.
9. A brake pad wear detection system as claimed in claim 1, wherein: the data processor is an arm microprocessor.
10. A brake pad wear detection system as claimed in claim 1, wherein: the display is an LCD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210589400.5A CN114857190A (en) | 2022-05-27 | 2022-05-27 | Brake pad wear detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210589400.5A CN114857190A (en) | 2022-05-27 | 2022-05-27 | Brake pad wear detection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114857190A true CN114857190A (en) | 2022-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210589400.5A Pending CN114857190A (en) | 2022-05-27 | 2022-05-27 | Brake pad wear detection system |
Country Status (1)
| Country | Link |
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| CN (1) | CN114857190A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024105482A1 (en) * | 2022-11-15 | 2024-05-23 | Stellantis Europe S.P.A. | Method for checking the residual thickness of a brake disc for a motor-vehicle disc brake device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0914314A (en) * | 1995-06-28 | 1997-01-14 | Akebono Brake Res & Dev Center Ltd | Electric type pad ware indicator |
| DE19744042A1 (en) * | 1997-10-06 | 1999-04-08 | Mannesmann Vdo Ag | Wear determination device for clutch disc pads in car |
| US6257374B1 (en) * | 2000-08-18 | 2001-07-10 | Trw Inc. | Brake pad wear sensing system and method |
| CN105308425A (en) * | 2013-06-21 | 2016-02-03 | 因温特奥股份公司 | Elevator brake force and distance sensor |
| CN107747901A (en) * | 2017-12-06 | 2018-03-02 | 中国石油大学(华东) | A kind of new real-time continuous detecting system of brake block thickness |
| CN108189828A (en) * | 2018-01-08 | 2018-06-22 | 中国石油大学(华东) | A kind of new brake block Braking Force Detection System |
| CN109789871A (en) * | 2016-07-29 | 2019-05-21 | Trw汽车美国有限责任公司 | Magnetic brake pad wear sensor |
| DE102018107158A1 (en) * | 2018-03-26 | 2019-09-26 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Measuring system and measuring method for determining a wear of a brake pad of a friction brake |
| CN112477839A (en) * | 2021-01-08 | 2021-03-12 | 山东理工大学 | Reluctance type automobile brake pad thickness detection structure |
-
2022
- 2022-05-27 CN CN202210589400.5A patent/CN114857190A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0914314A (en) * | 1995-06-28 | 1997-01-14 | Akebono Brake Res & Dev Center Ltd | Electric type pad ware indicator |
| DE19744042A1 (en) * | 1997-10-06 | 1999-04-08 | Mannesmann Vdo Ag | Wear determination device for clutch disc pads in car |
| US6257374B1 (en) * | 2000-08-18 | 2001-07-10 | Trw Inc. | Brake pad wear sensing system and method |
| CN105308425A (en) * | 2013-06-21 | 2016-02-03 | 因温特奥股份公司 | Elevator brake force and distance sensor |
| CN109789871A (en) * | 2016-07-29 | 2019-05-21 | Trw汽车美国有限责任公司 | Magnetic brake pad wear sensor |
| CN107747901A (en) * | 2017-12-06 | 2018-03-02 | 中国石油大学(华东) | A kind of new real-time continuous detecting system of brake block thickness |
| CN108189828A (en) * | 2018-01-08 | 2018-06-22 | 中国石油大学(华东) | A kind of new brake block Braking Force Detection System |
| DE102018107158A1 (en) * | 2018-03-26 | 2019-09-26 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Measuring system and measuring method for determining a wear of a brake pad of a friction brake |
| CN112477839A (en) * | 2021-01-08 | 2021-03-12 | 山东理工大学 | Reluctance type automobile brake pad thickness detection structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024105482A1 (en) * | 2022-11-15 | 2024-05-23 | Stellantis Europe S.P.A. | Method for checking the residual thickness of a brake disc for a motor-vehicle disc brake device |
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Application publication date: 20220805 |