CN116476794A - Vehicle brake detection method and detection device - Google Patents
Vehicle brake detection method and detection device Download PDFInfo
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- CN116476794A CN116476794A CN202310238678.2A CN202310238678A CN116476794A CN 116476794 A CN116476794 A CN 116476794A CN 202310238678 A CN202310238678 A CN 202310238678A CN 116476794 A CN116476794 A CN 116476794A
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- 238000001514 detection method Methods 0.000 title claims abstract description 165
- 230000002159 abnormal effect Effects 0.000 claims abstract description 55
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- 239000004020 conductor Substances 0.000 claims description 9
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- 238000000034 method Methods 0.000 abstract description 24
- 239000002131 composite material Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 13
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- 238000009434 installation Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 238000005562 fading Methods 0.000 description 6
- 230000002035 prolonged effect Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000000446 fuel Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention discloses a vehicle brake detection method and a detection device. The invention discloses a method for preparing a composite material, which comprises the following steps: acquiring the current temperature of a brake of a target vehicle and the contact state of the brake by a detection device, wherein the contact state is the contact state between a friction plate and a brake drum of the brake, and detecting whether the brake is abnormal or not according to the current temperature and the contact state; according to the invention, the current temperature and the contact state of the brake of the target vehicle are obtained through the detection device, so that whether the temperature of the brake is abnormal or not is detected according to the current temperature, and whether the brake works normally or not is detected according to the contact state, thereby realizing the accurate abnormality detection of the brake of the vehicle, and repairing the brake in time when the abnormality of the brake is detected, and greatly reducing the potential safety hazard of the vehicle.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a method and a device for detecting a vehicle brake.
Background
In the running process of a vehicle, the brake is used as one of the most important safety components of the vehicle, if a certain brake has abnormality such as pipeline failure or brake valve body failure, the corresponding brake does not work when the vehicle brakes, the driver is not easy to perceive, the braking distance is prolonged, and even the braking is lost. At present, the abnormality of the brake cannot be accurately detected, so that the brake of the vehicle cannot be timely maintained and repaired, and serious potential safety hazards exist in the vehicle.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The invention mainly aims to provide a vehicle brake detection method and device, and aims to solve the technical problem that the prior art cannot accurately detect the abnormality of a brake, so that the vehicle brake cannot be timely maintained and repaired, and serious potential safety hazards exist in a vehicle.
To achieve the above object, the present invention provides a vehicle brake detection method comprising the steps of:
acquiring the current temperature of a brake of a target vehicle and the contact state of the brake through a detection device, wherein the contact state is the contact state between a friction plate and a brake drum of the brake;
detecting whether the brake is abnormal according to the current temperature and the contact state.
Optionally, the detecting whether the brake is abnormal according to the current temperature and the contact state includes:
judging whether the current temperature exceeds a preset temperature threshold value, and determining the temperature state of the brake according to a temperature judgment result;
Detecting whether the brake has temperature abnormality according to the temperature state;
and detecting whether the brake is abnormal according to the contact state.
Optionally, the preset temperature threshold includes a first temperature threshold and a second temperature threshold; the judging whether the current temperature exceeds a preset temperature threshold value or not, and determining the temperature state of the brake according to the temperature judging result comprises the following steps:
judging whether the current temperature exceeds a first temperature threshold value;
if the current temperature does not exceed the first temperature threshold value, determining that the temperature state of the brake is a normal temperature state;
if the current temperature exceeds a first temperature threshold, judging whether the current temperature exceeds a second temperature threshold;
if the current temperature does not exceed a second temperature threshold, determining that the temperature state of the brake is a high temperature state;
and if the current temperature exceeds a second temperature threshold value, determining that the temperature state of the brake is a heat decay state.
Optionally, the brake comprises a parking brake; the detecting whether the brake has abnormal braking according to the contact state comprises the following steps:
acquiring a parking brake strategy of the target vehicle when the parking brake signal of the target vehicle is detected;
Determining a parking brake with a parking brake function according to the parking brake strategy;
judging whether each parking brake works normally or not according to the contact state;
and detecting whether the parking brake has abnormal braking according to the judging result.
Optionally, the brake further comprises a service brake; the detecting whether the brake has abnormal braking according to the contact state comprises the following steps:
when the service brake signal of the target vehicle is detected, acquiring a service brake strategy of the target vehicle;
determining a service brake with a service braking function according to the service braking strategy;
judging whether each service brake works normally or not according to the contact state;
and detecting whether the service brake has abnormal braking according to the judging result.
Optionally, the detecting whether the brake has a braking abnormality according to the contact state includes:
judging whether the friction plates in each parking brake are in contact with the brake drum or not according to the contact state when the parking brake signal of the target vehicle is not detected;
detecting whether the parking brake has abnormal braking according to a judging result;
Judging whether the friction plates in the service brakes are in contact with the brake drum or not according to the contact state when the service brake signal of the target vehicle is not detected;
and detecting whether the service brake has abnormal braking according to the judging result.
In addition, in order to achieve the above object, the present invention also proposes a detection device mounted on a brake of a target vehicle, the detection device being flush with a working surface of a friction plate of the brake;
the detection device includes: a contact detection mechanism and a temperature detection mechanism;
the contact detection structure includes: a housing and a core disposed within the housing;
the temperature detection mechanism is installed in the bottom of casing, the temperature detection mechanism includes: a temperature sensor;
the core is made of an electrically conductive material and the housing is made of an insulating material;
the contact detection mechanism is used for acquiring the contact state between the friction plate and the brake drum of the brake;
the temperature detection mechanism is used for acquiring the current temperature of the brake.
In addition, in order to achieve the above object, the present invention also proposes a vehicle brake detection device including:
The information acquisition module is used for acquiring the current temperature of a brake of a target vehicle and the contact state of the brake through the detection device, wherein the contact state is the contact state between a friction plate and a brake drum of the brake;
and the abnormality detection module is used for detecting whether the brake is abnormal or not according to the current temperature and the contact state.
In addition, to achieve the above object, the present invention also proposes a vehicle brake detection apparatus including: a memory, a processor, and a vehicle brake detection program stored on the memory and executable on the processor, the vehicle brake detection program configured to implement the steps of the vehicle brake detection method as described above.
In addition, in order to achieve the above object, the present invention also proposes a storage medium having stored thereon a vehicle brake detection program which, when executed by a processor, implements the steps of the vehicle brake detection method as described above.
The method comprises the steps of obtaining the current temperature of a brake of a target vehicle and the contact state of the brake through a detection device, wherein the contact state is the contact state between a friction plate and a brake drum of the brake, and detecting whether the brake is abnormal or not according to the current temperature and the contact state; according to the invention, the current temperature of the brake of the target vehicle and the contact state between the friction plate and the brake drum of the brake are obtained through the detection device, so that whether the temperature of the brake is abnormal or not is detected according to the current temperature, whether the friction plate of the brake is in contact with the brake drum or not is detected according to the contact state, and whether the braking function of the brake is normal or not is judged according to the detection result, the abnormal detection of the brake of the vehicle is accurately realized, and the brake can be repaired in time when the abnormal condition of the brake is detected, so that the potential safety hazard of the vehicle is greatly reduced.
Drawings
FIG. 1 is a schematic diagram of a vehicle brake detection device of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flow chart of a first embodiment of a method for detecting a brake of a vehicle according to the present invention;
FIG. 3 is a flow chart of a second embodiment of a method for detecting a vehicle brake according to the present invention;
FIG. 4 is a block diagram showing the construction of a first embodiment of a vehicle brake detection device according to the present invention;
FIG. 5 is a schematic cross-sectional view of a first embodiment of the detecting device of the present invention;
FIG. 6 is a schematic diagram illustrating the installation of a detection device according to a first embodiment of the detection device of the present invention;
fig. 7 is a schematic diagram illustrating the acquisition of a contact signal in a first embodiment of the detection device according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle brake detection device in a hardware running environment according to an embodiment of the present invention.
As shown in fig. 1, the vehicle brake detection apparatus may include: a processor 1001, such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (Wi-Fi) interface). The Memory 1005 may be a high-speed random access Memory (Random Access Memory, RAM) or a stable nonvolatile Memory (NVM), such as a disk Memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the structure shown in fig. 1 does not constitute a limitation of the vehicle brake detection apparatus, and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
As shown in fig. 1, an operating system, a network communication module, a user interface module, and a vehicle brake detection program may be included in the memory 1005 as one type of storage medium.
In the vehicle brake detection apparatus shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the vehicle brake detection apparatus of the present invention may be provided in the vehicle brake detection apparatus, which invokes the vehicle brake detection program stored in the memory 1005 through the processor 1001 and executes the vehicle brake detection method provided by the embodiment of the present invention.
An embodiment of the invention provides a vehicle brake detection method, referring to fig. 2, fig. 2 is a schematic flow chart of a first embodiment of the vehicle brake detection method of the invention.
In this embodiment, the vehicle brake detection method includes the steps of:
Step S10: the current temperature of a brake of the target vehicle and the contact state of the brake are acquired through a detection device.
It should be noted that, when the present embodiment is applied to detecting a brake of a target vehicle, the detecting device in the above embodiment obtains the current temperature of the brake of the target vehicle and the contact state between the friction plate and the brake drum of the brake, so as to detect whether the temperature of the brake is abnormal according to the current temperature, and detect whether the friction plate of the brake contacts the brake drum according to the contact state, so as to determine whether the braking function of the brake is normal according to the detection result, thereby realizing accurate abnormality detection on the vehicle brake, and timely repairing the brake when detecting the abnormality of the brake, and greatly reducing the potential safety hazard of the vehicle.
For example, if the wheels wade, muddy water enters the brake, the camshaft is not lubricated and maintained timely, and the camshaft, the roller or the brake shoe shaft is blocked; the return spring has insufficient spring force; or because the running cavity or the parking cavity of the brake chamber is in air blowby; the brake valve body fault, brake pipeline are folded down and the like can cause that the brake shoe can not return completely, namely the brake is dragged and braked. Because the brake is arranged on the axle, the inner side and the outer side are covered by the dust cover and the brake drum, the internal state of the brake cannot be checked in daily inspection of the vehicle, and whether the brake is dragged or not is inconvenient to check; if a drag brake occurs during driving, the driver is not easy to perceive. The friction plate can always generate heat with the brake drum during braking, the fuel consumption is increased when the friction plate is light, the heat is excessive when the friction plate is heavy, and braking heat fading occurs, so that the braking distance is prolonged and even the braking is lost. In addition, the hidden danger of causing the fire of peripheral parts exists in the high-temperature brake drum, and the abnormal detection of the temperature of the vehicle brake is realized by acquiring the current temperature of the brake through the detection device, so that the abnormal temperature problem of the brake can be timely detected.
For example, during the running of a vehicle, if a certain brake pipeline fails or a brake valve body fails, a corresponding brake is not operated during braking, so that a driver is not easy to perceive, the braking distance is prolonged, even braking is lost, and if a certain parking brake fails during parking of the vehicle, the driver is not easy to perceive, and the parking of the vehicle is unstable. In the embodiment, the detection device acquires the contact state between the friction plate and the brake drum in the brake to detect whether the braking function of the brake is normal, so that the abnormal braking problem of the brake is timely detected.
It should be understood that the main body of execution of the method of the present embodiment may be a vehicle brake detection apparatus having functions of data processing, network communication, and program running, such as an on-board controller, or other devices or apparatuses capable of achieving the same or similar functions, and the vehicle brake detection apparatus (hereinafter referred to as a brake detection apparatus) is described herein as an example.
It should be noted that the structure and function of the detection device in this embodiment are the same as the detection device in the previous embodiment. The above-mentioned current temperature may be the current temperature of the brake shoes in the brake of the target vehicle, i.e. the temperature signal of the brake is obtained by the detection means measuring the temperature of the brake shoes in the brake. The contact state may be a contact state between the friction plate and the brake drum in the brake.
It should be understood that, referring to fig. 7, fig. 7 is a schematic diagram of acquiring a contact signal, and when a brake drum is in contact with a friction plate in a brake, the brake is in a braking state, that is, when the contact state of the brake is in a contacted state; when the brake drum and the friction plate are not contacted in the brake, the brake is in an unbraked state, namely, the contact state of the brake is in an untouched state at the moment. For example, when the friction plate is in contact with the brake drum, the detection device is in contact with the brake drum (the brake drum is connected with the negative electrode of the power supply), the circuit is communicated with the negative electrode, the detection device acquires a contact signal at this time, the contact signal is sent to the brake detection device, and the brake detection device determines that the contact state of the brake is the contacted state according to the contact signal.
The brake detecting apparatus of the present embodiment detects the temperature of the brake shoe in the brake by a temperature detecting mechanism (e.g., a temperature sensor) in the detecting device, and determines the current temperature of the brake by receiving a temperature signal transmitted from the detecting device.
Step S20: detecting whether the brake is abnormal according to the current temperature and the contact state.
It should be understood that the brake detecting apparatus of the present embodiment detects whether or not there is a temperature abnormality in the brake by acquiring the current temperature of the brake; whether the brake is abnormal or not is detected by acquiring a contact state of the brake.
In a specific implementation, the brake detection device judges whether the current temperature of the brake exceeds a preset temperature threshold value, and determines whether the brake has temperature abnormality according to a judgment result, when the brake has temperature abnormality, the brake can generate brake heat fading, so that the brake distance of a vehicle is prolonged, and even the brake capability is lost.
The brake detection device judges whether the contact state of the brake accords with the current brake mode of the vehicle, determines whether the brake is abnormal according to the judging result, and if one or more brakes in the vehicle are in braking failure (namely, the friction plates in the brakes are not in normal contact with the brake drums at the moment) in the running or parking process of the vehicle, so that the corresponding brakes are not operated in braking, the braking distance of the vehicle is prolonged, and even the braking capacity is lost.
The method comprises the steps that the current temperature of a brake of a target vehicle and the contact state of the brake are obtained through a detection device, wherein the contact state is the contact state between a friction plate and a brake drum of the brake, and whether the brake is abnormal or not is detected according to the current temperature and the contact state; according to the invention, the current temperature of the brake of the target vehicle and the contact state between the friction plate and the brake drum of the brake are obtained through the detection device, so that whether the temperature of the brake is abnormal or not is detected according to the current temperature, whether the friction plate of the brake is in contact with the brake drum or not is detected according to the contact state, and whether the braking function of the brake is normal or not is judged according to the detection result, the abnormal detection of the brake of the vehicle is accurately realized, and the brake can be repaired in time when the abnormal state of the brake is detected, so that the potential safety hazard of the vehicle is greatly reduced.
Referring to fig. 3, fig. 3 is a flowchart of a second embodiment of a method for detecting a brake of a vehicle according to the present invention.
Based on the first embodiment, in this embodiment, the step S20 includes:
step S21: judging whether the current temperature exceeds a preset temperature threshold value, and determining the temperature state of the brake according to a temperature judging result.
The preset temperature threshold may be a preset temperature threshold for determining whether the brake is too hot. The preset temperature threshold may include a plurality of thresholds, for example, the preset temperature threshold may include a first temperature threshold and a second temperature threshold, and the brake detection apparatus determines whether the brake is too hot by determining whether the current temperature exceeds the first temperature threshold; determining whether the brake has thermal decay by determining whether the current temperature exceeds a second temperature threshold.
Further, the preset temperature threshold includes a first temperature threshold and a second temperature threshold; in order to accurately determine the temperature state of the brake, the above step S21 may include:
step S211: judging whether the current temperature exceeds a first temperature threshold value;
step S212: if the current temperature does not exceed the first temperature threshold value, determining that the temperature state of the brake is a normal temperature state;
step S213: if the current temperature exceeds a first temperature threshold, judging whether the current temperature exceeds a second temperature threshold;
step S214: if the current temperature does not exceed a second temperature threshold, determining that the temperature state of the brake is a high temperature state;
Step S215: and if the current temperature exceeds a second temperature threshold value, determining that the temperature state of the brake is a heat decay state.
The first temperature threshold may be a temperature threshold for determining whether the brake is at a high temperature, for example, the first temperature threshold may be 250 degrees, 260 degrees, 270 degrees, or the like. The second temperature threshold may be a temperature threshold for determining whether or not the brake is heat degraded, for example, the second temperature threshold may be 300 degrees or the like.
In a specific implementation, the preset temperature threshold may include two thresholds, a first threshold is used to alert the brake to the occurrence of high temperature, for example, the first threshold may be set to a value 50 ℃ lower than the brake shoe temperature at which the coefficient of friction of the brake is heat degraded, and a second threshold is used to alert that heat degradation has occurred, and is set to a brake shoe temperature value at which the coefficient of friction is degraded by 10%; the installation position of the detection device on the brake shoes can be the middle part of the two brake shoes or the shaft ends of the eccentric rollers, and the side close to the dust cover, namely, the area which is contacted with the brake drum at first in the opening process of the brake shoes, so that the sensor can monitor slight contact.
It should be understood that the brake detection device may set temperature thresholds for two brakes, and when the brake temperature exceeds the first temperature threshold, the brake detection device may output the position of the high temperature brake to the meter to alert the brake to the occurrence of high temperature; when the temperature of the brake exceeds a second temperature threshold, the brake detection device can output the position of the high-temperature brake to the instrument, and the position of the high-temperature brake is reminded to remind the driver of having brake heat fade so as to warn the driver of immediately stopping the vehicle for checking and avoid brake failure.
In the specific implementation, the brake detection device can acquire the current temperature of each brake in the target vehicle in real time through the detection device, and transmit the signals of the current temperature of each brake to the instrument, and a driver can select to check the temperature of each brake in real time at the instrument, so that the temperature reminding of the driver is realized.
Step S22: and detecting whether the brake has temperature abnormality according to the temperature state.
It should be noted that the temperature state may be a temperature state of the brake, for example, the temperature state may include a normal temperature state, a high temperature state, a heat fade state, etc., for example, a current temperature of a brake shoe in the brake is lower than 250 degrees, and the temperature state is determined to be a normal temperature state; the current temperature is 250-300 ℃, and the temperature state is judged to be a high temperature state; at the moment, the current temperature exceeds 300 ℃, at the moment, organic compounds in friction sheets in the brake are heated and decomposed, generated gas and liquid are separated out, the temperature state is judged to be a heat fading state, at the moment, the brake is subjected to braking heat fading, and the braking performance is seriously reduced.
It should be understood that, the brake detection device of this embodiment determines whether the brake is in a high temperature state or a heat fade state according to the temperature state, if so, determines that the brake is abnormal in temperature; if the brake is in a normal temperature state, judging that the brake is not abnormal in temperature.
Step S23: and detecting whether the brake is abnormal according to the contact state.
It should be understood that, the brake detection device in this embodiment determines whether the contact state of the brake matches the current braking mode of the vehicle, and determines whether the brake is abnormal according to the determination result, and if one or more brakes in the vehicle fail to brake (i.e. the friction plate and the brake drum in the brake are not normally contacted at this time) in the vehicle during driving or parking, so that the corresponding brakes do not work during braking, resulting in a longer braking distance of the vehicle and even losing braking capability.
Further, the brake includes a parking brake; in order to accurately detect whether the parking brake abnormality exists in the brake, the above step S23 may include:
acquiring a parking brake strategy of the target vehicle when the parking brake signal of the target vehicle is detected;
Determining a parking brake with a parking brake function according to the parking brake strategy;
judging whether each parking brake works normally or not according to the contact state;
and detecting whether the parking brake has abnormal braking according to the judging result.
The parking brake signal may be a brake signal of the target vehicle in a parked state. The above-described parking brake strategy may be a brake strategy in which the target vehicle is in a parking state, for example, the target vehicle has 4 brakes, and the parking brake strategy of the target vehicle may be a parking brake control of two brakes on the rear side of the target vehicle. The parking brake may be a brake usable for parking braking among the brakes of the target vehicle.
It should be understood that, since a friction plate of a parking brake for parking braking may be brought into contact with a brake drum in a parking state to generate a contact signal, the brake detecting apparatus may determine a parking brake position having a parking brake function among the respective brakes according to a parking brake strategy of the target vehicle. In a parking braking state, monitoring a contact signal between a friction plate and a brake drum of the parking brake: if all the parking brakes have contact signals, the parking function is normal at the moment; if the non-contact signal of the parking brake exists, the brake detection equipment outputs the corresponding brake position to the instrument, and the corresponding brake is prompted to fail in the parking brake.
Further, the brake further comprises a service brake; in order to accurately detect whether there is a service braking abnormality in the brake, the above step S23 may include:
when the service brake signal of the target vehicle is detected, acquiring a service brake strategy of the target vehicle;
determining a service brake with a service braking function according to the service braking strategy;
judging whether each service brake works normally or not according to the contact state;
and detecting whether the service brake has abnormal braking according to the judging result.
The service brake signal may be a brake signal of the target vehicle in a service state, for example, the service brake signal may be a brake pedal signal, and the brake detection device may detect the service brake signal by monitoring whether the target vehicle has the brake pedal signal. The service braking strategy may be a braking strategy in which the target vehicle is in a service state, for example, the target vehicle has a plurality of brakes, and the service braking strategy of the target vehicle may be to control the front and rear brakes of the target vehicle to perform service braking. The service brake may be a brake usable for service braking among the brakes of the target vehicle.
In a specific implementation, when detecting that a target vehicle has a brake pedal signal (service brake signal), the brake detection device determines each service brake in the target vehicle according to a service brake strategy of the target vehicle, detects whether friction plates of each service brake are in contact with a brake drum, and determines whether each service brake is abnormal according to a detection result.
For example, when the brake detection device detects that a certain or a plurality of brake friction plates and a brake drum do not have contact signals, the brake detection device outputs the brake installation positions corresponding to the contact signals of the friction plates and the brake drum to an instrument, a brake fault lamp is lightened, the instrument characters indicate the positions of the brake fault and the brake without signals of the current vehicle, and the positions are sounded to remind the driver to stop checking immediately.
Further, in order to effectively detect that the brake remains in contact when the target vehicle is not performing the braking operation, the step S23 may include:
judging whether the friction plates in each parking brake are in contact with the brake drum or not according to the contact state when the parking brake signal of the target vehicle is not detected;
detecting whether the parking brake has abnormal braking according to a judging result;
Judging whether the friction plates in the service brakes are in contact with the brake drum or not according to the contact state when the service brake signal of the target vehicle is not detected;
and detecting whether the service brake has abnormal braking according to the judging result.
It will be appreciated that the brake detection device monitors whether each service brake and parking brake has a contact signal when the parking brake signal and/or service brake signal is not detected: when a certain or a plurality of brake friction plates and a brake drum have contact signals, the situation of drag brake is judged, the corresponding brake installation positions with the contact signals of the friction plates and the brake drum are output to an instrument, a brake fault lamp is lightened, the instrument text prompts the position of the drag brake fault brake of the current vehicle, and the position is reminded by sound so as to warn a driver to stop checking immediately.
According to the embodiment, whether the temperature state of the brake is abnormal or not is determined according to a temperature judgment result by judging whether the current temperature exceeds a preset temperature threshold value, whether the brake is abnormal or not is detected according to the temperature state, and whether the brake is abnormal or not is detected according to the contact state; according to the embodiment, whether the temperature of the brake is abnormal or not is detected according to the temperature state by determining the temperature state of the brake, and whether the brake is abnormal or not is detected according to the contact state between the friction plate and the brake drum in the brake, so that the temperature abnormality problem and/or the brake abnormality problem of the brake are timely detected, and the braking safety performance of a vehicle is greatly improved.
In addition, the embodiment of the invention also provides a storage medium, wherein the storage medium stores a vehicle brake detection program, and the vehicle brake detection program realizes the steps of the vehicle brake detection method when being executed by a processor.
Because the storage medium adopts all the technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are not described in detail herein.
Referring to fig. 4, fig. 4 is a block diagram showing the construction of a first embodiment of a vehicle brake detection device according to the present invention.
As shown in fig. 4, a vehicle brake detection device according to an embodiment of the present invention includes:
an information acquisition module 10 for acquiring a current temperature of a brake of a target vehicle and a contact state of the brake by a detection device, the contact state being a contact state between a friction plate of the brake and a brake drum;
an abnormality detection module 20 for detecting whether there is an abnormality in the brake based on the current temperature and the contact state.
Further, the abnormality detection module 20 is further configured to determine whether the current temperature exceeds a preset temperature threshold, and determine a temperature state of the brake according to a temperature determination result; detecting whether the brake has temperature abnormality according to the temperature state; and detecting whether the brake is abnormal according to the contact state.
Further, the preset temperature threshold includes a first temperature threshold and a second temperature threshold;
the vehicle brake detection device further includes:
a temperature detection module 30, configured to determine whether the current temperature exceeds a first temperature threshold; if the current temperature does not exceed the first temperature threshold value, determining that the temperature state of the brake is a normal temperature state; if the current temperature exceeds a first temperature threshold, judging whether the current temperature exceeds a second temperature threshold; if the current temperature does not exceed a second temperature threshold, determining that the temperature state of the brake is a high temperature state; and if the current temperature exceeds a second temperature threshold value, determining that the temperature state of the brake is a heat decay state.
Further, the brake includes a parking brake;
the vehicle brake detection device further includes:
a brake detection module 40, configured to obtain a parking brake strategy of the target vehicle when a parking brake signal of the target vehicle is detected; determining a parking brake with a parking brake function according to the parking brake strategy; judging whether each parking brake works normally or not according to the contact state; and detecting whether the parking brake has abnormal braking according to the judging result.
Further, the brake further comprises a service brake;
the brake detection module 40 is further configured to obtain a service brake policy of the target vehicle when a service brake signal of the target vehicle is detected; determining a service brake with a service braking function according to the service braking strategy; judging whether each service brake works normally or not according to the contact state; and detecting whether the service brake has abnormal braking according to the judging result.
Further, the brake detection module 40 is further configured to determine, when the parking brake signal of the target vehicle is not detected, whether the friction plate in each parking brake is in contact with the brake drum according to the contact state; detecting whether the parking brake has abnormal braking according to a judging result; judging whether the friction plates in the service brakes are in contact with the brake drum or not according to the contact state when the service brake signal of the target vehicle is not detected; and detecting whether the service brake has abnormal braking according to the judging result.
In this embodiment, a detection device is provided, and referring to fig. 5 to 7, fig. 5 is a schematic cross-sectional structure of a first embodiment of the detection device of the present invention, where the detection device is applied to the method for detecting a brake of a vehicle.
The detection device is arranged on a brake of the target vehicle and is level with the working surface of a friction plate of the brake;
the detection device includes: a contact detection mechanism and a temperature detection mechanism;
the contact detection structure includes: a housing and a core disposed within the housing;
the temperature detection mechanism is installed in the bottom of casing, the temperature detection mechanism includes: a temperature sensor;
the core is made of an electrically conductive material and the housing is made of an insulating material;
the contact detection mechanism is used for acquiring the contact state between the friction plate and the brake drum of the brake;
the temperature detection mechanism is used for acquiring the current temperature of the brake.
It should be noted that, the detection device may be mounted on a brake shoe of a target vehicle brake, and in order to effectively monitor the conditions of two brake shoes in the brake, referring to fig. 6, fig. 6 is a schematic installation diagram of the detection device in this embodiment, the detection device may be mounted on two brake shoes of each brake of the target vehicle, so as to obtain two contact signals and a temperature signal of each brake respectively, obtain a contact state of the brake according to the contact signals, and obtain a current temperature of the brake according to the temperature signal. The temperature detection mechanism at the bottom of the shell in the detection device is attached to the brake shoe of the brake, and the temperature signal of the brake is obtained by measuring the temperature of the brake shoe through the temperature detection mechanism, so that the current temperature of the brake is obtained.
In the concrete implementation, considering that the cathode of the whole vehicle is grounded, the metal parts on the vehicle are connected with the cathode, the detection device can adopt an insulating material shell to wrap the conductive material of the core part, so that the contact of the conductive material of the core part and the metal parts except the brake drum is avoided, and all the materials of the detection device can be materials with hardness less than HB100 and no lubrication effect, thereby ensuring that the brake drum is not damaged and the braking effect of the brake is not reduced after the detection device is worn; the conductive material of the core part of the detection device can be conductive plastic, the conductive plastic is formed by mixing resin and conductive substances and processing the mixture in a plastic mode, and the conductive plastic can be required to have good conductive performance so as to ensure stable contact signals; the detection device on the brake shoe is provided with a Kong Chenkong design, and a temperature measurement part at the bottom of the detection device is fully attached to a counter bore of the brake shoe, so that accurate temperature measurement is ensured; the temperature threshold of the brake may include two thresholds, a first threshold for alerting the brake to a high temperature, set to a value 50 ℃ lower than the brake shoe temperature at which the coefficient of friction of the brake is heat degraded, and a second threshold for alerting that heat degradation has occurred, set to a brake shoe temperature value at which the coefficient of friction is degraded by 10%; the installation position of the detection device on the brake shoes can be arranged in the middle of the two brake shoes or at the shaft ends of the eccentric rollers and close to the dust cover side, namely, the contact area between the detection device and the brake drum is ensured in the opening process of the brake shoes, so that the detection device can monitor slight contact.
It should be understood that the target vehicle may be an automobile with electric systems adopting single-wire and negative electrode bonding systems, that is, the target vehicle includes a metal part such as a brake drum and the like and is connected with the negative electrode bonding of the storage battery, when the friction plate in the brake contacts the brake drum, the core conductive material of the detection device installed on the brake shoe contacts the brake drum at this time, that is, the conductive core circuit of the detection device is communicated with the negative electrode of the power supply; when the friction plate is not in contact with the brake drum, the circuit of the conductive core of the detection device (i.e., the conductive material of the core) is disconnected from the negative electrode of the power supply. Therefore, when the detection device is communicated with the negative electrode of the power supply, the detection device indicates that the brake friction plate is in friction contact with the brake drum.
In the embodiment, the signal output by each brake in the target vehicle can be received through the vehicle brake detection equipment (such as a vehicle-mounted controller), and the installation positions (such as a front axle left brake, a front axle right brake, a rear axle right brake and the like) of the brakes are identified and distinguished by the vehicle brake detection equipment, so that the brake with overhigh temperature or the fault brake position can be conveniently indicated by an instrument, and the detection and the maintenance are convenient.
In a specific implementation, referring to fig. 7, fig. 7 is a schematic diagram of acquiring a contact signal, in fig. 7, a left diagram is a schematic diagram of a friction plate not contacting a brake drum, and a right diagram is a schematic diagram of a friction plate contacting a brake drum. When the friction plate is not contacted with the brake drum, the detection device is disconnected with the brake drum (the negative electrode of the whole vehicle power supply is grounded, and the brake drum is connected with the negative electrode of the power supply); when the friction plate is contacted with the brake drum, the detection device is contacted with the brake drum (the brake drum is connected with the negative electrode of the power supply), and the circuit is communicated with the negative electrode. Therefore, when the detection device is communicated with the negative electrode of the power supply, the detection device indicates that the brake friction plate is in friction contact with the brake drum.
According to the embodiment, the detection device is arranged on the brake shoe in the brake, when the brake shoe is in friction contact with the brake drum, the conductive material in the detection device is in contact with the brake drum, and the detection device is connected with the negative electrode through the circuit, so that a signal that the brake friction plate is in contact with the brake drum is obtained. The brake working state can be monitored, if the fault conditions of non-return (drag brake) of the brake, high temperature of the brake or non-working of a certain brake during braking occur, the fault brake can be immediately displayed on an instrument, a driver is reminded of stopping and checking faults, the conditions of heat fading, braking failure, wheel side fire caused by high temperature generated by non-return and long-time non-standard use of service brake, and endangering service safety caused by braking function failure and the like caused by non-working of a certain brake are avoided, the life and property safety of drivers are ensured, and the bottom of the detection device is integrated with a temperature detection mechanism to monitor the temperature of a brake shoe, the temperature of the brake can be checked in real time by transmitting to the instrument driver in real time, and the driver can be reminded of the temperature of the brake through the instrument after the high Wen Chuxian heat fading.
It should be understood that the foregoing is illustrative only and is not limiting, and that in specific applications, those skilled in the art may set the invention as desired, and the invention is not limited thereto.
It should be noted that the above-described working procedure is merely illustrative, and does not limit the scope of the present invention, and in practical application, a person skilled in the art may select part or all of them according to actual needs to achieve the purpose of the embodiment, which is not limited herein.
In addition, technical details not described in detail in the present embodiment may refer to the method for detecting a vehicle brake provided in any embodiment of the present invention, which is not described herein.
Furthermore, it should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. Read Only Memory)/RAM, magnetic disk, optical disk) and including several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. A vehicle brake detection method, characterized by comprising:
Acquiring the current temperature of a brake of a target vehicle and the contact state of the brake through a detection device, wherein the contact state is the contact state between a friction plate and a brake drum of the brake;
detecting whether the brake is abnormal according to the current temperature and the contact state.
2. The vehicle brake detection method according to claim 1, characterized in that the detecting whether there is an abnormality in the brake based on the current temperature and the contact state includes:
judging whether the current temperature exceeds a preset temperature threshold value, and determining the temperature state of the brake according to a temperature judgment result;
detecting whether the brake has temperature abnormality according to the temperature state;
and detecting whether the brake is abnormal according to the contact state.
3. The vehicle brake detection method according to claim 2, wherein the preset temperature threshold value includes a first temperature threshold value and a second temperature threshold value; the judging whether the current temperature exceeds a preset temperature threshold value or not, and determining the temperature state of the brake according to the temperature judging result comprises the following steps:
judging whether the current temperature exceeds a first temperature threshold value;
If the current temperature does not exceed the first temperature threshold value, determining that the temperature state of the brake is a normal temperature state;
if the current temperature exceeds a first temperature threshold, judging whether the current temperature exceeds a second temperature threshold;
if the current temperature does not exceed a second temperature threshold, determining that the temperature state of the brake is a high temperature state;
and if the current temperature exceeds a second temperature threshold value, determining that the temperature state of the brake is a heat decay state.
4. The vehicle brake detection method according to claim 2, wherein the brake includes a parking brake; the detecting whether the brake has abnormal braking according to the contact state comprises the following steps:
acquiring a parking brake strategy of the target vehicle when the parking brake signal of the target vehicle is detected;
determining a parking brake with a parking brake function according to the parking brake strategy;
judging whether each parking brake works normally or not according to the contact state;
and detecting whether the parking brake has abnormal braking according to the judging result.
5. The vehicle brake detection method according to claim 2, wherein the brake further includes a service brake; the detecting whether the brake has abnormal braking according to the contact state comprises the following steps:
When the service brake signal of the target vehicle is detected, acquiring a service brake strategy of the target vehicle;
determining a service brake with a service braking function according to the service braking strategy;
judging whether each service brake works normally or not according to the contact state;
and detecting whether the service brake has abnormal braking according to the judging result.
6. The vehicle brake detection method according to any one of claims 2 to 5, characterized in that the detecting whether or not there is a braking abnormality of the brake according to the contact state includes:
judging whether the friction plates in each parking brake are in contact with the brake drum or not according to the contact state when the parking brake signal of the target vehicle is not detected;
detecting whether the parking brake has abnormal braking according to a judging result;
judging whether the friction plates in the service brakes are in contact with the brake drum or not according to the contact state when the service brake signal of the target vehicle is not detected;
and detecting whether the service brake has abnormal braking according to the judging result.
7. A detection device, characterized in that the detection device is mounted on a brake of a target vehicle, and the detection device is flush with a working surface of a friction plate of the brake;
The detection device includes: a contact detection mechanism and a temperature detection mechanism;
the contact detection structure includes: a housing and a core disposed within the housing;
the temperature detection mechanism is installed in the bottom of casing, the temperature detection mechanism includes: a temperature sensor;
the core is made of an electrically conductive material and the housing is made of an insulating material;
the contact detection mechanism is used for acquiring the contact state between the friction plate and the brake drum of the brake;
the temperature detection mechanism is used for acquiring the current temperature of the brake.
8. A vehicle brake detection apparatus, characterized by comprising:
the information acquisition module is used for acquiring the current temperature of a brake of a target vehicle and the contact state of the brake through the detection device, wherein the contact state is the contact state between a friction plate and a brake drum of the brake;
and the abnormality detection module is used for detecting whether the brake is abnormal or not according to the current temperature and the contact state.
9. A vehicle brake detection apparatus, characterized by comprising: a memory, a processor, and a vehicle brake detection program stored on the memory and operable on the processor, the vehicle brake detection program configured to implement the vehicle brake detection method of any one of claims 1 to 7.
10. A storage medium having stored thereon a vehicle brake detection program which, when executed by a processor, implements the vehicle brake detection method according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310238678.2A CN116476794A (en) | 2023-03-13 | 2023-03-13 | Vehicle brake detection method and detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310238678.2A CN116476794A (en) | 2023-03-13 | 2023-03-13 | Vehicle brake detection method and detection device |
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| Publication Number | Publication Date |
|---|---|
| CN116476794A true CN116476794A (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310238678.2A Pending CN116476794A (en) | 2023-03-13 | 2023-03-13 | Vehicle brake detection method and detection device |
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| Country | Link |
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| CN (1) | CN116476794A (en) |
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2023
- 2023-03-13 CN CN202310238678.2A patent/CN116476794A/en active Pending
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