CN109747413B - Intelligent protection system and intelligent protection method for preventing accelerator pedal from being stepped on mistakenly - Google Patents
Intelligent protection system and intelligent protection method for preventing accelerator pedal from being stepped on mistakenly Download PDFInfo
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- CN109747413B CN109747413B CN201910180109.0A CN201910180109A CN109747413B CN 109747413 B CN109747413 B CN 109747413B CN 201910180109 A CN201910180109 A CN 201910180109A CN 109747413 B CN109747413 B CN 109747413B
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Abstract
The invention discloses an intelligent protection system for preventing an accelerator pedal from being stepped on by mistake and an intelligent protection method thereof. The intelligent protection system comprises a first signal detection module, a first signal processing module and an anti-mistaken-stepping mechanism. The signal detection module detects the pedal acceleration A1 of an accelerator pedal of the automobile and the body acceleration A2 of a body of the automobile in real time. The first signal processing module obtains the acceleration difference A3 between A1 and A2, and outputs a first start signal when A3 is greater than the acceleration threshold A. And the mistaken stepping prevention mechanism supports the accelerator pedal according to the starting signal I to realize mistaken stepping prevention. The invention can effectively solve the problems that the traditional sensor can not work accurately due to large interference, some devices do not consider recoverability, and the device can be used again after the accelerator or the brake is locked and the device is damaged or needs complex operation, thereby effectively reducing the occurrence of accidents.
Description
Technical Field
The invention relates to an intelligent protection system for preventing an accelerator pedal from being stepped by mistake in the technical field of intelligent safe driving of automobiles, in particular to an intelligent protection system for preventing an accelerator pedal from being stepped by mistake and an intelligent protection method thereof.
Background
At present, with the economic development of China, cars are more and more popularized, the brought car accidents are more and more, a part of car accidents are caused by the fact that a driver steps on an accelerator by mistake, most of the reasons of the phenomenon are that a brake pedal and the accelerator are controlled by a right foot when a vehicle drives, the accelerator is stepped on by the right foot when the vehicle normally runs, when the vehicle needs to decelerate or stop, the right foot needs to be moved from the accelerator to the brake pedal and the brake pedal is pressed down by force to brake, however, when an emergency happens, the attention cannot be concentrated to a high degree due to the fact that the psychology of a person is too nervous, the accelerator is easy to be stepped on by the brake pedal due to the mistake in operation in a hurry, and therefore the car cannot stop but can accelerate to advance, and more serious traffic accidents are caused.
With the increase in the total number of automobiles, the cases of traffic accidents have increased year by year. Wherein, the accident rate caused by the driver mistakenly stepping on the accelerator pedal is up to 12.6 percent due to the reasons of unskilled technique, inattention, poor health state, overstrain and fatigue, influence of alcohol or medicines and the like. Aiming at the accidents, relevant researchers at home and abroad do a great deal of research work, and the obtained results are as follows: an accelerator pedal and a brake pedal are combined into a whole, but the original mechanical operation structure of the automobile is damaged by the pedals, the existing driving habit is changed, and the driver is difficult to adapt to the pedals; the emergency braking mechanical remedy device for the automobile mistakenly stepping on the accelerator pedal is adopted, the existing operation habit is not changed, but the problems of difficult installation, insufficient response sensitivity, excessively complex structure and the like exist; the system has high requirements on obstacles, and common obstacles are not necessarily effective.
Disclosure of Invention
Aiming at the prior technical problem, the invention provides an intelligent protection system for preventing an accelerator pedal from being stepped on by mistake and a using method thereof, and obtains a technical scheme with strong anti-interference capability for preventing the accelerator pedal from being stepped on by mistake.
The invention is realized by adopting the following technical scheme: an intelligent accelerator false stepping prevention system, comprising:
the signal detection module I is used for acquiring the pedal acceleration A1 of an accelerator pedal of an automobile and the vehicle body acceleration A2 of a vehicle body of the automobile in real time;
the first signal processing module is used for acquiring an acceleration difference A3, wherein A3 is A1-A2; when the acceleration difference A3 is greater than the acceleration threshold A, outputting a first starting signal;
the mistaken stepping prevention mechanism is used for propping the accelerator pedal to realize mistaken stepping prevention according to the starting signal I; the anti-mistaken stepping mechanism comprises a relay and an electromagnetic ejection device; the relay is triggered by the starting signal I and is reset by a reset signal; the electromagnetic ejection device comprises a bracket, an electromagnet, a spring and a metal blocking sheet; the bracket is fixed on the surface of the stepping surface of the accelerator pedal; the electromagnet is fixed on the bracket and is powered off to lose the electromagnetic force when the relay is triggered; one end of the spring is fixed on the electromagnet, the other end of the spring is a free end, and the blocking piece is fixed on the free end;
when the mistaken-stepping prevention mechanism is in an initial state, the electromagnet has electromagnetic force and adsorbs the blocking piece, the spring is positioned between the electromagnet and the blocking piece in a compressed state, and the blocking piece is suspended on the bottom surface in the vehicle body at a height of B1; when the mistaken stepping prevention mechanism is in a working state, the electromagnet loses electromagnetic force, the spring is in a completely released state and pushes the blocking piece to abut against the bottom surface in the vehicle body, and the blocking piece abuts against the accelerator pedal to move downwards by supporting the accelerator pedal on the bottom surface in the vehicle body; the electromagnet is in when the relay resets, reacquires the electromagnetic force and adsorbs the piece that blocks, block the piece and be height B2 unsettled on the bottom surface in the automobile body, promote through external force block the piece in order to adsorb completely on the electromagnet and make the spring resets.
As a further improvement of the above scheme, the first signal processing module further outputs a second start signal when the acceleration difference a3 is greater than the acceleration threshold a;
the intelligent protection system further comprises an emergency auxiliary braking subsystem, wherein the emergency auxiliary braking subsystem is used for adjusting the opening degree of an electronic throttle valve of the automobile according to the starting signal II so as to change the running speed of the automobile;
the emergency auxiliary braking subsystem comprises:
a second signal detection module, configured to obtain a displacement amount S1 of the accelerator pedal in real time;
and the second signal processing module is used for judging whether the displacement S1 is larger than a preset displacement threshold S or not, and reducing the opening degree of the electronic throttle valve to realize the deceleration of the vehicle body when the displacement S1 is larger than the displacement threshold S.
As a further improvement of the above scheme, the second signal detection module includes:
and an accelerator displacement sensor for detecting the displacement amount S1 in real time.
As a further improvement of the above solution, when the displacement amount S1 is not greater than the displacement amount threshold S, the second signal processing module continues to acquire the real-time displacement amount S1 and performs corresponding signal processing.
As a further improvement of the above scheme, the reset signal is output by the first signal processing module n seconds after the first start signal is output.
As a further improvement of the above solution, the first signal processing module eliminates the interference voltage signals of the pedal acceleration a1 and the vehicle body acceleration a2 before acquiring the acceleration difference A3; the elimination mode of the interference voltage signal is as follows: first, the pedal acceleration A1 and the vehicle body acceleration A2 are subjected to subtraction isolation, and then, A/D conversion is performed.
As a further improvement of the above solution, the first signal detection module includes:
the first acceleration sensor is used for detecting the acceleration A1 of the pedal in real time, and the first acceleration sensor is installed on the accelerator pedal and moves the same as the electromagnetic ejection device;
and a second acceleration sensor for detecting the acceleration A2 of the vehicle body in real time, wherein the second acceleration sensor is installed below the accelerator pedal.
As a further improvement of the above solution, when the acceleration difference A3 is not greater than the acceleration threshold a, the signal processing module continues to acquire the real-time pedal acceleration a1 and the vehicle body acceleration a2 and performs corresponding signal processing.
The invention also discloses an intelligent protection method for preventing the accelerator pedal from being stepped on by mistake, which applies any one of the intelligent protection systems for preventing the accelerator pedal from being stepped on by mistake, and the intelligent protection method comprises the following steps:
acquiring a pedal acceleration A1 of an accelerator pedal of an automobile and a body acceleration A2 of a body of the automobile in real time;
acquiring an acceleration difference A3, wherein A3 is A1-A2; when the acceleration difference A3 is greater than the acceleration threshold A, outputting a first starting signal;
and triggering the relay according to the starting signal to enable the electromagnet to lose electromagnetic force, wherein the spring is in a completely released state and pushes the blocking piece to abut against the bottom surface in the vehicle body, and the blocking piece abuts against the accelerator pedal to move downwards by supporting the accelerator pedal on the bottom surface in the vehicle body.
As a further improvement of the above scheme, the relay receives a reset signal to reset, so that the electromagnet obtains electromagnetic force to adsorb the blocking sheet, and the blocking sheet is suspended on the bottom surface in the vehicle body at a height of B2;
the blocking piece is pushed by external force to be completely adsorbed on the electromagnet, so that the spring is reset.
The invention has the advantages that the double sensors are used for information acquisition of the system, so that the automobile has strong anti-interference capability in a complex driving environment, the acquired acceleration data reference is greatly improved, the misjudgment result is reduced, and the device has recoverability, and the initial state can be recovered by stepping on the accelerator pedal device again after the spring device of a driver is triggered. The problem that the traditional sensor cannot work accurately due to large interference, some devices do not consider recoverability, and the device can be reused after being damaged or needing complex operation after an accelerator or a brake is locked can be effectively solved, and accidents are effectively reduced.
Drawings
Fig. 1 is an execution mechanism diagram of an intelligent protection system for preventing an accelerator pedal from being stepped on by mistake according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of the electromagnetic ejection device in fig. 1.
Fig. 3 is another schematic structural diagram of the electromagnetic ejection device in fig. 2.
FIG. 4 is a schematic flow chart of an intelligent protection method for preventing mistaken stepping on an accelerator pedal according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the system for intelligently preventing the accelerator from being stepped on by mistake of the present embodiment mainly includes a signal detection module i 1, a signal processing module i 2, a mistaken stepping prevention mechanism 3, an emergency auxiliary braking subsystem 4, and a power module 5.
The signal detection module I1 is used for detecting the pedal acceleration A1 of an accelerator pedal of an automobile and the vehicle body acceleration A2 of a vehicle body of the automobile in real time. There are many devices for acquiring the pedal acceleration a1 and the vehicle body acceleration a2 in real time, and in the present embodiment, the signal detection module one 1 is implemented by using sensors, such as an acceleration sensor one and an acceleration sensor two.
The acceleration sensor I is used for detecting the acceleration A1 of the pedal in real time, and the acceleration sensor I can be installed on the accelerator pedal. The second acceleration sensor is used for detecting the acceleration A2 of the vehicle body in real time, and can be installed below an accelerator pedal. Two sensors detect the pedal acceleration and the vehicle body acceleration in real time.
The signal processing module one 2 is used for acquiring an acceleration difference value A3, wherein A3 is a 1-a 2; and when the acceleration difference A3 is greater than the acceleration threshold A, outputting an enabling signal I and an enabling signal II. When the acceleration difference A3 is not greater than the acceleration threshold A, the signal processing module I2 continues to acquire the real-time pedal acceleration A1 and the vehicle body acceleration A2 and carries out corresponding signal processing.
Before obtaining the acceleration difference A3, the signal processing module one 2 may eliminate the disturbance voltage signals of the pedal acceleration a1 and the vehicle body acceleration a 2. The interference voltage signal is eliminated in the following mode: first, the pedal acceleration A1 and the vehicle body acceleration A2 are subjected to subtraction isolation, and then, A/D conversion is performed.
In the present embodiment, the signal processing module one 2 includes a signal processing unit 21 and an MCU unit 22. The signal processing unit 21 is used for eliminating most of interference voltage signals generated when the automobile bumps and goes up and down, so that the collected signals can reflect the state of the accelerator pedal most truly and reliably. The MCU unit 22 is configured to use an MCU minimum system as a core, communicate with the signal processing unit 21, and perform corresponding data processing after receiving data from the signal processing unit 21.
The main frame of the signal processing unit 21 may mainly consist of a subtraction isolation circuit and an ADC0809 analog-to-digital conversion chip. The subtraction isolation circuit respectively performs subtraction isolation on the pedal acceleration A1 and the vehicle body acceleration A2, and the pedal acceleration A1 and the vehicle body acceleration A2 which are subjected to subtraction isolation are subjected to corresponding line A/D conversion through an analog-to-digital conversion chip and converted into a series of 2-system codes.
The main frame of the MCU unit 22 may mainly be composed of a minimum system of STC89C52 single chip microcomputer, and may receive the binary code output after analog-to-digital conversion, convert the binary code into a 10-ary number, compare the 10-ary number with a set action threshold, and if the 10-ary number exceeds the action threshold, execute a corresponding action, e.g., the MCU unit 22 outputs a first start signal and a second start signal.
The mistaken stepping prevention mechanism 3 is used for supporting the accelerator pedal to realize mistaken stepping prevention according to the starting signal I; the anti-false-stepping mechanism comprises a relay 31 and an electromagnetic ejection device 32.
The relay 31 is triggered by the start signal one and is reset by a reset signal. This reset signal may be provided by a manual input, such as a switch provided in the vehicle, by pressing a button to provide the reset signal to the relay 31. The reset signal may also be provided in a manner automatically generated by the system, for example, after outputting the start signal for n seconds, the MCU unit 22 of the signal processing module one 2 outputs the reset signal, and the time of n seconds is enough for the driver to recognize that the driver is in a state of mistakenly stepping on the accelerator pedal 6, so as to take a proper measure for avoiding an accident. MCU unit 22 may receive the binary code output after analog-to-digital conversion and convert it into a 10-ary number to compare with the set action threshold, and turn off relay 31 if the action threshold is exceeded.
Referring to fig. 2, the electromagnetic ejector 32 includes a bracket 321, an electromagnet 322, a spring 323, and a metal blocking plate 324.
The bracket 321 is fixed on the surface of the accelerator pedal 6 except the stepping surface of the automobile. The fixing manner of the bracket 321 on the accelerator pedal 6 is various, as shown in fig. 2, the bracket 321 is fixed on one side of the accelerator pedal 6, and as shown in fig. 3, the bracket 321 extends from one side of the accelerator pedal 6 to the opposite side of the accelerator pedal 6, and tightly clamps the accelerator pedal 6 through a limit bolt 325.
The side of the accelerator pedal 6 can lead out the main working area of the electromagnetic ejection device 32. The electromagnet 322 is fixed on the bracket 321 and is powered off to lose the electromagnetic force when the relay 31 is triggered, so that the relay 31 determines whether the electromagnetic catapult 32 is used or not. One end of the spring 323 is fixed to the electromagnet 322, and the other end of the spring 323 is a free end to which the blocking piece 324 is fixed.
When the anti-misstep mechanism 3 is in the initial state, the electromagnet 322 has electromagnetic force and adsorbs the blocking piece 324, the spring 323 is located between the electromagnet 322 and the blocking piece 324 in a compressed state, and the blocking piece 324 is suspended on the bottom surface 8 in the vehicle body at a height B1. When the anti-misstep mechanism 3 is in an operating state, the electromagnet 322 loses the electromagnetic force, the spring 323 is in a complete release state and pushes the blocking piece 324 to abut against the bottom surface 8 in the vehicle body, and the blocking piece 324 abuts against the accelerator pedal 6 to move downwards by supporting the accelerator pedal 6 on the bottom surface in the vehicle body.
In the present embodiment, the relay 31 is connected in series to the power supply circuit of the electromagnetic ejection device 32, and the electromagnetic ejection device 32 is in a magnetic attraction state when not operating. When the relay 31 is controlled by the MCU 22 to be turned off, the magnetism of the electromagnet 322 disappears, and the spring 323 is ejected to prevent the accelerator pedal 6 from moving downwards. The device uses the double sensors, so that the automobile has strong anti-interference capability in a complex driving environment, the reference of the acquired acceleration data is greatly improved, the misjudgment result is reduced, and the device has recoverability, and the initial state can be recovered only by stepping on the accelerator pedal device again after the spring device of the driver is triggered.
When the relay 31 is reset, the electromagnet 322 regains electromagnetic force to attract the blocking piece 324, the blocking piece 324 is suspended on the bottom surface in the vehicle body in a height of B2, and the blocking piece 324 is pushed by external force to be completely attracted to the electromagnet 322 to reset the spring 323. For example, the driver can raise the blocking piece 324 by the back of the foot, so that the blocking piece 324 is completely adsorbed on the electromagnet 322 against the gravity, and finally the reset is realized. When the device is reset, a driver needs to step on the accelerator pedal 6 with enough force to overcome resistance brought by the spring 323, so that the spring 323 is compressed to be close to and completely adsorbed on the electromagnet 322, and it needs to be noted that before resetting, the automobile must be in a neutral gear or completely step on the clutch pedal, so that secondary accidents cannot be caused when the accelerator pedal 6 is stepped on, and finally resetting is realized based on the situation. The problem that the traditional sensor cannot work accurately due to large interference, some devices do not consider recoverability, and the device can be reused after being damaged or needing complex operation after an accelerator or a brake is locked can be effectively solved, and accidents are effectively reduced. What is more, the key point is that the blocking piece 324 can be pushed only by external force to reset the spring 323, so that when the driver steps on the accelerator by mistake, the tense mind of the driver can be relieved, timely mental adjustment can be made, accidents can be reduced, and the problem of serious traffic accidents caused by disordered mind can be solved really.
Therefore, when the relay 31 is turned off, the electromagnet 322 loses magnetic force, the blocking piece 324 is quickly ejected out under the action of the spring 323 and finally abuts against the accelerator pedal 6, and mistaken stepping is prevented. The blocking piece 324 is preferably made of a metal material, and when the relay 31 is turned on, the electromagnet 322 attracts the blocking piece 324 and the accelerator pedal 6 is normally used. Of course, in other embodiments, the blocking plate 324 may not be made of metal, but the spring 323 is made of metal, which also achieves the effect of the present invention, and only the spring 323 is used, so that the spring 323 is easy to be elastically fatigued after long-term use, and the effect is damaged. Preferably, the blocking plate 324 and the spring 323 are made of metal.
Because the relay 31 is connected in series in the power supply circuit of the electromagnetic ejection device 32, the electromagnetic ejection device 32 is in a magnetic attraction state when not in operation. When the relay 31 is controlled by the MCU unit 22 to turn off, the electromagnet 322 of the electromagnetic ejector 32 loses its magnetic property, and the spring 323 ejects to prevent the accelerator pedal 6 from moving downward. Therefore, the present invention controls the compression degree of the spring 323 by controlling the connection and disconnection of the circuit of the electromagnet 322 in the electromagnetic ejection device 32, and further controls the anti-misstep blocking strength.
And the emergency auxiliary braking subsystem 4 is used for adjusting the opening of an electronic throttle valve 9 of the automobile according to the second starting signal so as to change the running speed of the automobile. The emergency auxiliary braking subsystem 4 comprises a second signal detection module and a second signal processing module.
And the second signal detection module is used for acquiring the displacement S1 of the accelerator pedal in real time. In this embodiment, the second signal detection module is implemented by using the accelerator displacement sensor 41, and the accelerator displacement sensor 41 detects the displacement S1 in real time. The accelerator displacement sensor 41 is mounted at the accelerator pedal 6 and used for measuring the displacement of the accelerator pedal 6, the accelerator displacement sensor 41 is a main component of the emergency auxiliary braking system, the accelerator displacement sensor 41 is used for collecting information and transmitting the displacement S1 to the signal processing module II for processing in real time.
The signal processing module is used for judging whether the displacement S1 is larger than a preset displacement threshold S or not, and reducing the opening degree of the electronic throttle valve to realize the deceleration of the vehicle body when the displacement S1 is larger than the displacement threshold S. When the displacement amount S1 is not greater than the displacement amount threshold S, the second signal processing module continues to acquire a real-time displacement amount S1 and performs corresponding signal processing.
In the present embodiment, the second signal processing module is the ECU module 42, the ECU module 42 is internally provided with a displacement threshold S, receives the displacement S1 output by the accelerator displacement sensor 41, compares the received displacement S1 with the displacement threshold S, and outputs a control signal to the electronic throttle module 9 if the displacement S1 is greater than the displacement threshold S. The electronic throttle module 9 is a part of a vehicle and includes a servo motor, and upon receiving a control signal transmitted from the ECU module 42, the servo motor drives a throttle actuator to change the opening degree of an engine throttle, and to reduce the opening degree of the electronic throttle, thereby changing the speed at which the vehicle travels.
Therefore, the emergency auxiliary braking subsystem 4 assists the electromagnetic catapult 32 to prevent mistaken stepping, if the driver calls the emergency braking program after the electromagnetic catapult 32 is started, and when the accelerator displacement sensor 41 detects that the displacement S1 of the accelerator pedal 6 is large, the ECU module 42 receives the signal of the accelerator displacement sensor 41, performs comparison analysis, and outputs an instruction to the electronic throttle module 9 to perform secondary deceleration. The emergency auxiliary braking subsystem 4 also prevents the occurrence of secondary accidents caused by the fact that a driver feels panic after stepping on the accelerator pedal 6 by mistake and unconsciously increases the foot force to step on the accelerator pedal 6 and overcome the resistance of the spring 323 after starting the electromagnetic catapult 32.
Referring to fig. 4, the acceleration information a1 and a2 measured by the two acceleration sensors is input to the subtraction isolation circuit in the form of voltage, the subtraction isolation circuit outputs two voltage difference values, the two voltage difference values are converted into binary codes A3 output in parallel through the a/D module, the binary codes are converted into decimal numbers in the MCU unit 22 and compared with a preset action threshold a, if A3 is greater than a, the relay 31 is turned off, and the blocking piece 324 pops up to block the accelerator pedal 6 from being continuously stepped on. While the relay 31 is turned off, the MCU 22 sends a start command to the ECU module 42 via the bus, and a preset emergency braking program is called in the ECU module 42, and the program implements the following functions: and calling the displacement S1 of the accelerator displacement sensor, comparing the displacement S1 with a preset displacement threshold S, if S1< S, continuing to call the displacement S1 of the accelerator displacement sensor 41 to compare with the preset threshold S, and if S1> S, controlling a servo motor by the ECU module 42 to reduce the opening of an electronic throttle valve, and performing secondary speed reduction to avoid accidents. When the electric appliance 1 is closed again after 2 seconds of the turn-off of the relay 31, the MCU 22 sends an instruction to the ECU module 42 at the moment, and the program is exited so as not to influence normal driving; if a3< a, then the acceleration detection state is returned, the relay 31 is unchanged, and the MCU unit 22 also does not send a command to the ECU module 42 to start the program.
The power module 5 supplies power to the whole system, in this embodiment, the MCU 22 of the present invention can be powered by a vehicle-mounted power supply, and the vehicle-mounted USB interface directly supplies power to the single chip via a data line. The power supply of the electromagnet 322 in the electromagnetic ejection device 32 is served by a rechargeable battery, the rechargeable battery is also provided with a voltage alarm device, and when the voltage is about to be lower than the critical voltage of the electromagnet 322 capable of adsorbing the spring 323 and the blocking sheet 324, the LED flashes to alarm to remind a driver of replacing the battery.
The invention has the advantages that the double sensors are used for information acquisition of the system, so that the automobile has strong anti-interference capability in a complex driving environment, the acquired acceleration data reference is greatly improved, the misjudgment result is reduced, and the device has recoverability, and the initial state can be recovered by stepping on the accelerator pedal device again after the spring device of a driver is triggered. The problem that the traditional sensor cannot work accurately due to large interference, some devices do not consider recoverability, and the device can be reused after being damaged or needing complex operation after an accelerator or a brake is locked can be effectively solved, and accidents are effectively reduced.
In other embodiments, the emergency auxiliary braking subsystem 4 may not be provided, and certainly the effect is not achieved after the emergency auxiliary braking subsystem 4 is provided, but the solution of the problem of preventing the accelerator pedal from being stepped on by mistake is sufficient. If the emergency auxiliary braking subsystem 4 is not provided, the signal processing module one 2 does not need to output the second starting signal.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an intelligent protection system of accelerator pedal prevents stepping on by mistake which characterized in that, it includes:
the first signal detection module is used for detecting the pedal acceleration A1 of an accelerator pedal of an automobile and the vehicle body acceleration A2 of a vehicle body of the automobile in real time;
the first signal processing module is used for acquiring an acceleration difference A3, wherein A3 is A1-A2; when the acceleration difference A3 is greater than the acceleration threshold A, outputting a first starting signal;
the mistaken stepping prevention mechanism is used for propping the accelerator pedal to realize mistaken stepping prevention according to the starting signal I; the anti-mistaken stepping mechanism comprises a relay and an electromagnetic ejection device; the relay is triggered by the starting signal I and is reset by a reset signal; the electromagnetic ejection device comprises a bracket, an electromagnet, a spring and a blocking sheet made of metal; the bracket is fixed on the surface of the stepping surface of the accelerator pedal; the electromagnet is fixed on the bracket and is powered off to lose the electromagnetic force when the relay is triggered; one end of the spring is fixed on the electromagnet, the other end of the spring is a free end, and the blocking piece is fixed on the free end;
when the mistaken-stepping prevention mechanism is in an initial state, the electromagnet has electromagnetic force and adsorbs the blocking piece, the spring is positioned between the electromagnet and the blocking piece in a compressed state, and the blocking piece is suspended on the bottom surface in the vehicle body at a height of B1;
when the mistaken stepping prevention mechanism is in a working state, the electromagnet loses electromagnetic force, the spring is in a completely released state and pushes the blocking piece to abut against the bottom surface in the vehicle body, and the blocking piece abuts against the accelerator pedal to move downwards by supporting the accelerator pedal on the bottom surface in the vehicle body;
the electromagnet is in when the relay resets, reacquires the electromagnetic force and adsorbs the piece that blocks, block the piece and be height B2 unsettled on the bottom surface in the automobile body, promote through external force block the piece in order to adsorb completely on the electromagnet and make the spring resets.
2. The intelligent protection system for preventing the accelerator pedal from being stepped on mistakenly as claimed in claim 1, wherein the first signal processing module further outputs a second starting signal when the acceleration difference value A3 is greater than the acceleration threshold value A;
the intelligent protection system further comprises an emergency auxiliary braking subsystem, wherein the emergency auxiliary braking subsystem is used for adjusting the opening degree of an electronic throttle valve of the automobile according to the starting signal II so as to change the running speed of the automobile;
the emergency auxiliary braking subsystem comprises:
a second signal detection module, configured to obtain a displacement amount S1 of the accelerator pedal in real time;
and the second signal processing module is used for judging whether the displacement S1 is larger than a preset displacement threshold S or not, and reducing the opening degree of the electronic throttle valve to realize the deceleration of the vehicle body when the displacement S1 is larger than the displacement threshold S.
3. The intelligent protection system for preventing the accelerator pedal from being stepped on mistakenly according to claim 2, wherein the second signal detection module comprises:
and an accelerator displacement sensor for detecting the displacement amount S1 in real time.
4. The intelligent protection system for preventing accelerator pedal from being stepped on mistakenly as claimed in claim 2, wherein when the displacement amount S1 is not greater than the displacement amount threshold S, the second signal processing module continues to obtain a real-time displacement amount S1 and performs corresponding signal processing.
5. The intelligent protection system for preventing accelerator pedal from being stepped on mistakenly according to claim 1, wherein the reset signal is output by the signal processing module after the start signal is output for n seconds.
6. The intelligent protection system for preventing the accelerator pedal from being stepped on mistakenly according to claim 1, wherein the signal processing module firstly eliminates interference voltage signals of pedal acceleration A1 and vehicle body acceleration A2 before acquiring the acceleration difference A3; the elimination mode of the interference voltage signal is as follows: first, the pedal acceleration A1 and the vehicle body acceleration A2 are subjected to subtraction isolation, and then, A/D conversion is performed.
7. The intelligent protection system for preventing the accelerator pedal from being stepped on mistakenly according to claim 1, wherein the first signal detection module comprises:
the first acceleration sensor is used for detecting the acceleration A1 of the pedal in real time, and the first acceleration sensor is installed on the accelerator pedal and moves the same as the electromagnetic ejection device;
and a second acceleration sensor for detecting the acceleration A2 of the vehicle body in real time, wherein the second acceleration sensor is installed below the accelerator pedal.
8. The intelligent protection system for preventing the accelerator pedal from being stepped on mistakenly according to claim 1, wherein when the acceleration difference value A3 is not greater than the acceleration threshold value A, the signal processing module continues to acquire real-time pedal acceleration A1 and vehicle body acceleration A2 and performs corresponding signal processing.
9. An intelligent protection method for preventing accelerator pedal from being stepped on by mistake, which is characterized by applying the intelligent protection system for preventing accelerator pedal from being stepped on by mistake as claimed in any one of claims 1-8, wherein the intelligent protection method comprises the following steps:
acquiring a pedal acceleration A1 of an accelerator pedal of an automobile and a body acceleration A2 of a body of the automobile in real time;
acquiring an acceleration difference A3, wherein A3 is A1-A2; when the acceleration difference A3 is greater than the acceleration threshold A, outputting a first starting signal;
and triggering the relay according to the starting signal to enable the electromagnet to lose electromagnetic force, wherein the spring is in a completely released state and pushes the blocking piece to abut against the bottom surface in the vehicle body, and the blocking piece abuts against the accelerator pedal to move downwards by supporting the accelerator pedal on the bottom surface in the vehicle body.
10. The intelligent protection method for preventing the accelerator pedal from being stepped on by mistake as claimed in claim 9, wherein the intelligent protection method further comprises the following steps:
the relay receives a reset signal to reset, so that the electromagnet obtains electromagnetic force to adsorb the blocking sheet, and the blocking sheet is suspended on the bottom surface in the vehicle body in a height of B2;
the blocking piece is pushed by external force to be completely adsorbed on the electromagnet, so that the spring is reset.
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| CN110315972A (en) * | 2019-07-17 | 2019-10-11 | 湖南汽车工程职业学院 | A kind of intelligent automobile error stepping on accelerator pedal auxiliary braking system |
| CN110466351B (en) * | 2019-08-26 | 2022-03-29 | 上海申沃客车有限公司 | Detection control method for preventing mistaken stepping on accelerator of passenger car |
| CN110733340B (en) * | 2019-11-19 | 2020-10-13 | 合肥工业大学 | Automobile accelerator pedal mistaken-stepping prevention system capable of automatically resetting and control method thereof |
| CN111422172B (en) * | 2020-02-19 | 2023-04-28 | 韩世杰 | Automobile brake control method and system |
| CN111873798B (en) * | 2020-07-28 | 2021-06-04 | 深圳职业技术学院 | Device and method for remedying mistaken stepping of accelerator pedal of automobile |
| CN112874298A (en) * | 2021-04-15 | 2021-06-01 | 广州市交通技师学院(广州市交通高级技工学校) | Intelligent control system for preventing accelerator from being stepped on mistakenly |
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| CN201052778Y (en) * | 2007-01-16 | 2008-04-30 | 朱久红 | Automobile accelerator pedal retarding mechanism |
| CN201201590Y (en) * | 2008-04-15 | 2009-03-04 | 尚雯雯 | Mechanical protecting device for preventing pressing accelerator pedal mistakenly in case of automobile emergency braking |
| CN201633555U (en) * | 2008-12-31 | 2010-11-17 | 广州市品壹电器科技有限公司 | Contact-type incorrect-braking intelligent controlling and braking device for motor vehicle |
| JP5335049B2 (en) * | 2011-10-04 | 2013-11-06 | 株式会社ツタ | Accelerator pedal misoperation prevention device |
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