CN114103968A - Automobile speed control method and system - Google Patents
Automobile speed control method and system Download PDFInfo
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- CN114103968A CN114103968A CN202111400439.XA CN202111400439A CN114103968A CN 114103968 A CN114103968 A CN 114103968A CN 202111400439 A CN202111400439 A CN 202111400439A CN 114103968 A CN114103968 A CN 114103968A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/10—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to vehicle motion
- B60W40/105—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
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Abstract
The application relates to a method and a system for controlling the speed of an automobile, which belong to the field of automobile speed control methods, wherein the method comprises the steps of obtaining reverse gear information; acquiring rear obstacle distance data of a reversing radar; judging the safety level of the automobile based on the rear obstacle distance data; calling a speed limit command corresponding to the safety level, wherein the speed limit command comprises a maximum allowable speed per hour; and controlling the speed of the vehicle based on the speed limit command so that the vehicle runs within the maximum allowed speed per hour. The application has the advantages of reducing potential safety hazards during automobile driving and improving driving safety.
Description
Technical Field
The application relates to the technical field of automatic control of automobiles, in particular to an automobile speed control method and system.
Background
At present, some automatic control technologies are applied to a traffic system in automatic vehicle control, and the traditional technology for improving mechanical performance is developed into an auxiliary technology or a technology for partially or completely replacing human operation, so that the aims of reducing accidents caused by human limitations, lightening driving strength, improving traffic efficiency and reducing pollution are fulfilled.
When an existing automobile is backed, the actual distance between the tail of the automobile and a nearest obstacle can be detected through a backing radar, the situation of the obstacle around a driver can be informed through sound or more visual display, and the automobile parking or backing safety auxiliary device is used; however, when a novice driver backs a car, the speed of the car is difficult to accurately control, even the accelerator is used as a brake under a tension condition, and the safety hazard exists when the car is driven, so that the improvement is needed.
Disclosure of Invention
In order to reduce potential safety hazards during automobile driving, the application provides an automobile speed control method and an automobile speed control system.
In a first aspect, the present application provides a method for controlling a vehicle speed, which adopts the following technical scheme:
a vehicle speed control method is applied to a vehicle speed control system for controlling the speed of a vehicle, and comprises the following steps:
acquiring reverse gear information;
acquiring rear obstacle distance data of a reversing radar;
judging the safety level of the automobile based on the rear obstacle distance data;
calling a speed limit command corresponding to the safety level, wherein the speed limit command comprises a maximum allowable speed per hour;
and controlling the speed of the vehicle based on the speed limit command so that the vehicle runs within the maximum allowed speed per hour.
By adopting the technical scheme, when a driver adjusts the gear to reverse on the R gear, the vehicle speed control system can acquire the reverse gear information and judge that the driver needs to reverse at the moment, the vehicle backs at a slower speed, the general driver can slow down the reverse speed by stepping on the brake and increase the reverse speed by stepping on the accelerator; at the moment, the reversing radar at the tail part of the automobile detects the distance between the rear obstacle and the tail part of the automobile, and rear obstacle distance data are obtained, wherein the rear obstacle distance data are the obstacle data closest to the tail part of the automobile and can reflect the distance between the tail part of the automobile and the closest obstacle; then the system judges the safety level of the automobile according to the rear obstacle distance data, if the rear obstacle distance data value is small, the distance between the automobile and the rear obstacle is closer and closer, and the safety level is lower; the method comprises the steps of calling speed limiting commands corresponding to safety levels, namely limiting the automobile to back at different speeds at different distances, wherein the speed limiting commands comprise maximum allowed speed per hour, controlling the automobile to run at the maximum allowed speed per hour by a vehicle speed control system, reducing the collision condition caused by mistaken stepping on the accelerator by a driver if the driver deeply steps on the accelerator, limiting the speed of the automobile according to the distance between a rear obstacle and the tail of the automobile, reducing the maximum allowed speed per hour of the automobile when the distance is closer to the rear obstacle, and playing a certain limiting role, so that the potential safety hazard during driving is reduced.
Optionally, the invoking of the speed limit command corresponding to the safety level includes:
obtaining the weight of the automobile, and judging the weight grade based on the weight of the automobile;
accessing a weight matching database, and calling a speed matching database corresponding to the weight grade;
and accessing the speed matching database, and calling the speed limiting command corresponding to the safety level.
By adopting the technical scheme, when the weight of the automobile is larger, the inertia of the automobile is also larger, so when the speed limit command corresponding to the safety level is called, the weight of the automobile is obtained through the weight sensor on the automobile, the weight level is judged based on the weight of the automobile, the weight level of the automobile is also higher when the weight of the automobile is larger, then the weight matching database is accessed, different speed matching databases corresponding to different weight levels are prestored in the weight matching database, the speed matching database corresponding to the weight level is called, finally the called speed matching database is accessed, the speed limit command corresponding to the safety level is called, when the weight of the automobile is larger, the speed matching database limited by the speed limit command in the speed matching database is lower, so that different maximum allowable hourly speeds can be called at different safety levels according to different weights of the automobile, therefore, when a driver finds a dangerous emergency brake, the automobile is not easy to brake and slide due to overlarge inertia, and the safety during reversing is further improved.
Optionally, the obtaining the weight of the vehicle and determining the weight grade based on the weight of the vehicle includes:
acquiring the weight of a vehicle seat and the weight of a trunk;
summing the seat weight and the trunk weight to generate a car weight;
determining a weight rating based on the vehicle weight.
Through adopting above-mentioned technical scheme, when acquireing the weight of car, through the weight sensor on every saddle, acquire passenger's weight on the saddle, through the weight sensor in the trunk, acquire the weight of article in the trunk, sum saddle weight and trunk weight, and the weight of car body generally changes little, mainly personnel's quantity and weight in the car to and the weight of article in the trunk has influenced the weight of car, judge the weight grade based on car weight, it is more accurate to measure.
Optionally, the vehicle speed control system is associated with an electronic hand brake on the vehicle, and the method further includes:
acquiring reverse gear information;
acquiring rear obstacle distance data detected by a reversing radar;
when the rear obstacle distance data is equal to or smaller than a dangerous distance, generating a braking instruction;
and controlling the work of the electronic hand brake to emergently brake the vehicle based on the brake instruction.
By adopting the technical scheme, the electronic hand brake and the automobile speed control system which are configured on the automobile are mutually associated, the electronic hand brake can carry out emergency braking so as to enable the automobile to stop quickly, when the automobile backs, rear obstacle distance data are obtained through backing radar detection, when the rear obstacle distance data are equal to or smaller than a dangerous distance, the distance between the automobile and the rear obstacle is judged to be short at the moment, the automobile speed control system generates a braking instruction at the moment, the electronic hand brake is controlled to automatically work based on the braking instruction so as to enable the automobile to brake, the automatic braking function during backing is realized, the situation that a driver does not observe the rear obstacle distance and does not brake in time is reduced, and the phenomenon of collision when the automobile backs is further reduced.
Optionally, the method further includes:
acquiring reverse gear information;
acquiring a plurality of rear obstacle distance data;
comparing the rear obstacle distance data, and calling the rear obstacle distance data with the minimum value;
and sending the rear obstacle distance data to a central control screen so that the central control screen displays the rear obstacle distance data.
By adopting the technical scheme, when the automobile backs a car, because the radar of backing a car on the automobile afterbody is provided with a plurality of, can acquire a plurality of rear obstacle distance data through the radar of backing a car, compare a plurality of rear obstacle distance data, select the rear obstacle distance data that numerical value is minimum, and correlation between well accuse screen and the speed control system, speed control system sends the rear obstacle distance data that numerical value is minimum to well accuse screen, well accuse screen is with rear obstacle distance data, like this when backing a car, the driver can more directly perceivedly know the distance between the nearest obstacle distance car of automobile afterbody through well accuse screen, make things convenient for the distance between control car and the obstacle when the driver backs a car, reduce and the risk of bumping between the obstacle.
Optionally, the method further includes:
acquiring the weight of a main driving parking space and an electronic hand brake state, wherein the electronic hand brake state comprises a braked state and an unbraked state;
when the weight of the main driving parking space is smaller than a driver judgment reference value and the electronic hand brake is in a non-braking state, generating the braking instruction;
and controlling the work of the electronic hand brake to emergently brake the vehicle based on the brake instruction.
By adopting the technical scheme, the weight sensor is configured on the seat of the main driver, whether the driver is on the seat of the main driver is judged according to the weight data detected by the weight sensor, the state of the electronic hand brake is acquired at the same time, the electronic hand brake is in a braked state when being braked, the electronic hand brake is in an unbraked state when being released, when the weight of the parking space of the main driver is smaller than the judgment reference value of the driver, the driver is not on the main driver at the moment, and if the electronic hand brake is also in the unbraked state at the moment, the driver is judged that the driver gets off the vehicle and does not pull up the hand brake, a brake instruction is generated at the moment, the electronic hand brake is controlled to work so as to brake the vehicle emergently, the phenomenon that the vehicle slips because the driver gets off the vehicle but does not pull up the hand brake is reduced, and the effect of automatic work of the electronic hand brake after the driver gets off the vehicle is realized.
Optionally, the method further includes:
acquiring an automatic cruise instruction;
acquiring voice information in the vehicle;
analyzing the voice information in the vehicle, and identifying voice character information in the voice information in the vehicle, wherein the voice character information comprises safety characters and vehicle speed parameters;
when the safety words and the automobile speed parameters simultaneously appear in the voice word information, accessing an action instruction database, and calling a speed control instruction corresponding to the automobile speed parameters;
and controlling the speed of the automobile to be increased or decreased based on the speed control instruction so as to enable the running speed of the automobile to be consistent with the speed parameter of the automobile.
By adopting the technical scheme, the automobile is provided with an automatic cruise function, wherein automatic cruise refers to that the automobile automatically advances at the speed set by a driver, the driver does not need to control an accelerator, and the automobile is kept advancing at the set speed; however, when the existing set speed is modified, manual control is needed, so that a driver may not always observe a road ahead when changing the set speed, the driver speaks safety characters and automobile speed parameters, a vehicle speed control system is provided with a microphone, voice information in the vehicle is obtained through the microphone, the voice character information in the voice information is recognized, when the safety characters and the automobile speed parameters simultaneously appear in the voice character information, the driver judges that the set driving speed of the vehicle needs to be changed through voice at the moment, a speed control instruction corresponding to the automobile speed parameters is called at the moment, the vehicle performs speed reduction or speed increase according to the speed control instruction so that the driving speed of the vehicle is consistent with the automobile speed parameters, so that the driver does not need to manually change the set speed when using the automatic cruise function, through speech recognition's mode, can control the car and change to the speed that needs, navigating mate can carefully observe the road conditions, convenience and security when further having improved driving when automatic cruise.
In a second aspect, the present application provides an automobile speed control system, which adopts the following technical scheme: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the reversing judgment module is used for acquiring reversing gear information;
the distance detection module is used for acquiring the distance data of the rear obstacle of the reversing radar;
the grade judging module is used for judging the safety grade of the automobile based on the rear obstacle distance data;
the speed limit module is used for calling a speed limit command corresponding to the safety level, and the speed limit command comprises a maximum allowable speed per hour;
and the vehicle speed control module is used for controlling the speed of the vehicle based on the speed limit command so that the vehicle runs within the maximum allowable speed per hour.
In a third aspect, the present application provides an intelligent terminal comprising a memory and a processor, the memory having stored thereon a computer program that can be loaded by the processor and that performs any of the methods described above.
In a fourth aspect, the present application provides a computer readable storage medium storing a computer program capable of being loaded by a processor and executing any one of the methods as described above.
In summary, the present application includes at least one of the following beneficial technical effects:
1. in the application, when an automobile backs, a vehicle speed control system can acquire backing gear information and judge that a driver needs to back at the moment, a backing radar at the tail of the automobile detects the distance between a rear barrier and the tail of the automobile and acquires rear barrier distance data, then the system judges the safety level of the automobile according to the rear barrier distance data and calls speed limit commands corresponding to the safety level, namely, the automobile is limited to back at different speeds under different distances, the speed limit commands comprise maximum allowable speed per hour, the vehicle speed control system controls the automobile to run within the maximum allowable speed per hour, at the moment, if a driver deeply steps on an accelerator, the speed of the automobile cannot exceed the maximum allowable speed per hour, the condition that the driver collides due to mistaken stepping on the accelerator is reduced, and the vehicle speed of the automobile is limited according to the distance between the rear barrier and the tail of the automobile, when the distance from the rear obstacle is closer, the maximum allowable speed per hour of the automobile is reduced, a certain limiting effect is achieved, and therefore potential safety hazards during driving are reduced;
2. further, an electronic hand brake configured on the automobile is correlated with an automobile speed control system, the electronic hand brake can perform emergency braking to enable the automobile to stop quickly, when the automobile backs, rear obstacle distance data are obtained through backing radar detection, when the rear obstacle distance data are equal to or smaller than a dangerous distance, the fact that the distance between the automobile and the rear obstacle is short at the moment is judged, the automobile speed control system generates a braking instruction, the electronic hand brake is controlled to automatically work based on the braking instruction to enable the automobile to brake, the automatic braking function during backing is achieved, the situation that a driver does not observe the rear obstacle distance and does not brake timely is reduced, and the phenomenon that the automobile collides during backing is further reduced;
3. furthermore, a weight sensor is arranged on the seat of the main driver, whether a driver is on the seat of the main driver is judged according to weight data detected by the weight sensor, the state of an electronic hand brake is obtained, the electronic hand brake is in a braked state when being braked, the electronic hand brake is in an unbraked state when being released, when the weight of the main driver parking space is smaller than a driver judgment reference value, it is judged that the driver does not get on the main driver parking space at the moment, and if the electronic hand brake is also in the unbraked state at the moment, it is judged that the driver does not pull up the hand brake when getting off the vehicle, a brake instruction is generated at the moment, the electronic hand brake is controlled to work so as to brake the vehicle emergently, the phenomenon that the vehicle slips because the driver gets off the vehicle but does not pull up the hand brake is reduced, and the effect of electronic hand brake automatic work after the driver gets off the vehicle is realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a detailed flowchart of a vehicle speed control method according to an embodiment of the present application.
Fig. 2 is a schematic flow chart of step 104 in the embodiment of the present application.
Fig. 3 is a schematic flowchart of step 201 in the embodiment of the present application.
Fig. 4 is a schematic flow chart of automatic braking when approaching a rear obstacle when the automobile backs up in the embodiment of the application.
Fig. 5 is a flowchart showing rear obstacle distance data in the embodiment of the present application.
Fig. 6 is a schematic flow chart of automatic braking after the driver gets off the vehicle in the embodiment of the application.
Fig. 7 is a schematic flow chart of controlling the speed of the vehicle in the automatic cruise control in the embodiment of the present application.
Fig. 8 is a schematic diagram of a vehicle speed control system of an embodiment of the present application.
Detailed Description
The present application is described in further detail below with reference to figures 1-8.
The embodiment of the application discloses an automobile speed control method, which is applied to an automobile speed control system, wherein an execution main body is a control chip in the automobile speed control system, when the automobile speed control system is used, when a vehicle backs, if a driver deeply steps on an accelerator for acceleration, the automobile speed control system can control the automobile speed to run in a set range, so that the automobile speed does not exceed the maximum value of the set range, the risk of collision caused by mistakenly stepping on the accelerator by the driver is reduced, and a certain reaction time is provided for the driver.
The following will describe the processing flow in detail with reference to fig. 1 in conjunction with the specific embodiments, and the contents may be as follows:
In an embodiment, the automobile speed control system and the automobile gear control system are mutually associated, when a driver needs to reverse, the driver can adjust a gear on an R gear, the automobile gear control system sends gear information to the automobile speed control system, the automobile speed control system can obtain the gear information for reversing at the moment due to reversing, and the automobile speed control system judges that the driver backs at the moment. When backing a car, general driver can slow down the speed of backing a car through stepping on the brake, increases the speed of backing a car through stepping on the throttle.
And 102, acquiring rear obstacle distance data of the reversing radar.
In the embodiment, when backing a car, the radar of backing a car of car afterbody can acquire the distance of rear barrier distance car afterbody, and the radar of backing a car adopts ultrasonic ranging's mode, and in this embodiment, the radar of backing a car of acquiescence car afterbody has a plurality of, and the radar of backing a car transmits the rear barrier distance data that detect for speed control system, and speed control system selects the rear barrier distance data that numerical value is minimum, can reflect the distance between car afterbody and the nearest barrier.
And 103, judging the safety level of the automobile based on the rear obstacle distance data.
In an embodiment, after receiving the rear obstacle distance data, the control chip determines the safety level to which the automobile belongs according to the rear obstacle distance data, and if the rear obstacle distance data is small, the rear obstacle distance data represents that the distance between the automobile and the rear obstacle is closer and closer, and at this time, the determination safety level is lower, for example, when the rear obstacle distance data is more than 4 meters, the safety level is 3, and when the rear obstacle distance data is 1 to 4 meters, the safety level is 2.
And 104, calling a speed limit command corresponding to the safety level, wherein the speed limit command comprises the maximum allowable speed per hour.
In the embodiment, after the safety level is determined during backing, speed limit commands corresponding to the safety level are called, that is, the automobile is limited to backing within different speeds under different distances, wherein the speed limit commands include the maximum allowable speed per hour, for example, when the safety level is 3 levels, the maximum allowable speed per hour in the speed limit commands is 15 km/h, and when the safety level is 2 levels, the maximum allowable speed per hour in the speed limit commands is 7 km/h.
And 105, controlling the speed of the vehicle based on the speed limit command so that the vehicle runs within the maximum allowable speed per hour.
In the embodiment, the vehicle speed control system controls the vehicle to run within the maximum allowable speed per hour, at the moment, if a driver deeply steps on an accelerator, the speed of the vehicle cannot exceed the maximum allowable speed per hour, the situation that the vehicle is collided due to the fact that the driver mistakenly steps on the accelerator is reduced, the vehicle speed of the vehicle is limited according to the distance between a rear obstacle and the tail of the vehicle, when the distance between the rear obstacle and the rear obstacle is shorter, the maximum allowable speed per hour of the vehicle is reduced, the reaction time is strived for the driver, the vehicle speed cannot be instantly increased, a certain limiting effect is achieved, and therefore potential safety hazards during driving are reduced.
Further, the method limits the speed of the vehicle when the vehicle is backed by distance judgment, but the speed of the vehicle is influenced by inertia, and if the weight of the vehicle is higher, the inertia of the vehicle is higher at this time, and the speed of the vehicle is difficult to control, so referring to fig. 2, in step 104, the method includes:
In the embodiment, when the speed limit command corresponding to the safety level is called, the weight of the automobile is obtained through a weight sensor on the automobile, the weight level is judged based on the weight of the automobile, and the weight level of the automobile is higher when the weight of the automobile is larger. And then accessing a weight matching database, wherein different speed matching databases corresponding to different weight grades are prestored in the weight matching database, and calling the speed matching database corresponding to the weight grade. And finally, accessing the called speed matching database, calling speed limiting commands corresponding to the safety levels, wherein when the weight of the automobile is larger, the speed matching database limited by the speed limiting commands in the speed matching database is lower, so that different maximum allowable speeds can be called at different safety levels according to different weights of the automobile, and the automobile is not easy to brake and slide due to too high speed when a driver finds a dangerous emergency brake.
Further, the weight of the automobile body is mostly not changed, and in order to accurately judge the weight change of other positions of the automobile, referring to fig. 3, step 201 includes:
In the embodiment, when the weight of the automobile is obtained, the weight of passengers on the automobile seats is obtained through the weight sensor on each automobile seat, the weight of articles in a trunk is obtained through the weight sensor in the trunk, the weight of the automobile seats and the weight of the trunk are summed to generate the weight of the automobile, the weight of an automobile body is not changed greatly, the weight of the automobile is mainly influenced by the number and the weight of the persons in the automobile, and the weight grade is judged based on the weight of the automobile, so that the measurement is more accurate.
Further, the counter weight on the automobile is provided with an electronic hand brake, the speed control system is associated with the electronic hand brake, the speed control system can control the electronic hand brake to be turned on or off, and referring to fig. 4, the method further comprises:
and step 404, controlling the electronic hand brake to work based on the brake instruction so as to brake the vehicle emergently.
In an embodiment, when the automobile backs up, the distance data of the rear obstacle is obtained through the back radar detection, and when the distance data of the rear obstacle is equal to or smaller than a dangerous distance, the distance between the automobile and the rear obstacle is judged to be short, and the dangerous distance can be 3-5 CM. At the moment, the automobile speed control system generates a brake instruction, and the electronic hand brake is controlled to automatically work based on the brake instruction, so that the automobile is braked emergently, the function of automatic braking during reversing is realized, the situation that a driver does not observe rear obstacles and does not brake in time is reduced, and the phenomenon of collision during reversing of the automobile is further reduced.
Further, when backing a car, the distance between the tail of the car and the nearest barrier behind the car can be displayed through the central control screen, and referring to fig. 5, the method further comprises:
and step 504, sending the rear obstacle distance data to the central control screen so that the central control screen can display the rear obstacle distance data.
In an embodiment, when the automobile backs, the plurality of backing radars are arranged on the tail of the automobile, so that the control chip can acquire the distance data of the plurality of rear obstacles through the backing radars, compare the distance data of the plurality of rear obstacles, and select the distance data of the rear obstacles with the minimum value. The central control screen and the vehicle speed control system are correlated, the control chip sends rear obstacle distance data with the minimum numerical value to the central control screen, and the central control screen displays the rear obstacle distance data. Therefore, when backing a car, a driver can more visually know the distance between the tail of the car and the nearest barrier from the car through the central control screen, the distance between the car and the barrier is conveniently controlled when the driver backs the car, and the risk of collision between the driver and the barrier is reduced.
Further, referring to fig. 6, the method further includes:
601, acquiring the weight of a main driving parking space and an electronic hand brake state, wherein the electronic hand brake state comprises a braked state and an unbraked state;
and step 603, controlling the electronic hand brake to work based on the brake instruction so as to brake the vehicle emergently.
In the embodiment, a weight sensor is arranged on the seat of the main driver, and whether a driver is on the seat of the main driver is judged according to weight data detected by the weight sensor. And meanwhile, the state of the electronic hand brake is acquired, the electronic hand brake is in a braked state when being braked, and the electronic hand brake is in an unbraked state when being released. When the weight of the main driving parking space is smaller than the judgment reference value of the driver, the fact that the driver does not exist in the main driving parking space is judged, and if the electronic hand brake is also in the non-braking state, the fact that the driver gets off the vehicle and does not pull up the hand brake is judged. And a braking instruction is generated at the moment, the electronic hand brake is controlled to work so as to brake the vehicle emergently, and the condition that the vehicle slips because a driver gets off the vehicle but does not pull up the hand brake is reduced.
Further, the automobile is provided with an automatic cruise system, the automatic cruise is that the automobile automatically advances at a speed set by a driver, the driver does not need to control an accelerator, and the automobile is kept advancing at the set speed, but most of the automobiles in the market need manual operation to adjust the set speed, which has certain potential safety hazard, so the method further comprises the following steps:
In the embodiment, when the automatic cruise function is used, the control chip acquires an automatic cruise instruction, and the automobile starts automatic cruise. At the moment, a driver speaks the safety words and the automobile speed parameters, the automobile speed control system is provided with a microphone, the microphone acquires the voice information in the automobile, the voice word information in the voice information is recognized, and when the safety words and the automobile speed parameters simultaneously appear in the voice word information, for example, the safety words are 'speed regulation' and the automobile speed parameters are '60'. And judging that the driver needs to change the set running speed of the automobile to 60 km/h through voice at the moment, calling a speed control instruction corresponding to the speed parameter of the automobile at the moment, and reducing or increasing the speed of the automobile according to the speed control instruction so as to enable the running speed of the automobile to be consistent with the speed parameter of the automobile. Therefore, when the automatic cruise function is used, a driver does not need to manually change the set speed, the automobile can be controlled to change to the required speed in a voice recognition mode, the driver can carefully observe the road condition, and the convenience and the safety during driving during automatic cruise are further improved.
The embodiment of the application also discloses an automobile speed parameter. Referring to fig. 8, the vehicle speed control system includes:
and the reversing judgment module is used for acquiring reversing gear information.
And the distance detection module is used for acquiring the distance data of the rear obstacle of the reversing radar.
And the grade judgment module is used for judging the safety grade of the automobile based on the rear obstacle distance data.
And the speed limit module is used for calling a speed limit command corresponding to the safety level, and the speed limit command comprises the maximum allowable speed per hour.
And the vehicle speed control module is used for controlling the speed of the vehicle based on the speed limit command so that the vehicle runs within the maximum allowable speed per hour.
Specifically, the speed limit module comprises:
the weight obtaining submodule is used for obtaining the weight of the automobile and judging the weight grade based on the weight of the automobile;
the database retrieval submodule is used for accessing the weight matching database and retrieving the speed matching database corresponding to the weight grade;
and the speed calling submodule is used for accessing the speed matching database and calling the speed limiting command corresponding to the safety level.
Specifically, the vehicle speed control system further includes:
the distance comparison module is used for comparing the rear obstacle distance data and calling the rear obstacle distance data with the minimum value;
and the distance display module is used for sending the rear obstacle distance data to a central control screen so that the central control screen displays the rear obstacle distance data.
Specifically, the vehicle speed control system further includes:
the state acquisition module is used for acquiring the weight of a main driving parking space and the state of an electronic hand brake, wherein the state of the electronic hand brake comprises a braked state and an unbraked state;
the command generation module is used for generating the braking command when the weight of the main driving parking space is smaller than a driver judgment reference value and the electronic hand brake is in a non-braking state;
and the emergency brake module is used for controlling the work of the electronic hand brake to emergently brake the vehicle based on the brake command.
Specifically, the vehicle speed control system further includes:
the cruise judgment module is used for acquiring an automatic cruise instruction;
the voice acquisition module is used for acquiring voice information in the vehicle;
the voice analysis module is used for analyzing the voice information in the vehicle;
the command generation module is also used for accessing an action command database and calling a speed control command corresponding to the automobile speed parameter when the safety words and the automobile speed parameter appear in the voice word information at the same time;
and the vehicle speed control module is also used for controlling the vehicle to increase or decrease the speed based on the speed control instruction so as to enable the vehicle running speed to be consistent with the vehicle speed parameter.
The embodiment of the application also discloses an intelligent terminal, which comprises a memory and a processor, wherein the memory is stored with a computer program which can be loaded by the processor and can execute the automobile speed control method.
The embodiment of the application also discloses a computer readable storage medium, which stores a computer program capable of being loaded by a processor and executing the automobile speed control method, and the computer readable storage medium comprises the following components: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above examples are only used to illustrate the technical solutions of the present application, and do not limit the scope of protection of the application. It is to be understood that the embodiments described are only some of the embodiments of the present application and not all of them. All other embodiments, which can be derived by a person skilled in the art from these embodiments without making any inventive step, are within the scope of the present application.
Claims (10)
1. A vehicle speed control method is applied to a vehicle speed control system for controlling the speed of a vehicle, and comprises the following steps:
acquiring reverse gear information;
acquiring rear obstacle distance data of a reversing radar;
judging the safety level of the automobile based on the rear obstacle distance data;
calling a speed limit command corresponding to the safety level, wherein the speed limit command comprises a maximum allowable speed per hour;
and controlling the speed of the vehicle based on the speed limit command so that the vehicle runs within the maximum allowed speed per hour.
2. The vehicle speed control method according to claim 1, characterized by comprising, in the calling up the speed limit command corresponding to the safety class:
obtaining the weight of the automobile, and judging the weight grade based on the weight of the automobile;
accessing a weight matching database, and calling a speed matching database corresponding to the weight grade;
and accessing the speed matching database, and calling the speed limiting command corresponding to the safety level.
3. The vehicle speed control method of claim 2, wherein the obtaining of the vehicle weight, the judging of the weight rank based on the vehicle weight, includes:
acquiring the weight of a vehicle seat and the weight of a trunk;
summing the seat weight and the trunk weight to generate a car weight;
determining a weight rating based on the vehicle weight.
4. The vehicle speed control method of claim 1, wherein the vehicle speed control system is associated with an electronic hand brake on the vehicle, the method further comprising:
acquiring reverse gear information;
acquiring rear obstacle distance data detected by a reversing radar;
when the rear obstacle distance data is equal to or smaller than a dangerous distance, generating a braking instruction;
and controlling the work of the electronic hand brake to emergently brake the vehicle based on the brake instruction.
5. The vehicle speed control method of an automobile according to claim 4, characterized by further comprising:
acquiring reverse gear information;
acquiring a plurality of rear obstacle distance data;
comparing the rear obstacle distance data, and calling the rear obstacle distance data with the minimum value;
and sending the rear obstacle distance data to a central control screen so that the central control screen displays the rear obstacle distance data.
6. The vehicle speed control method of an automobile according to claim 1, characterized by further comprising:
acquiring the weight of a main driving parking space and an electronic hand brake state, wherein the electronic hand brake state comprises a braked state and an unbraked state;
when the weight of the main driving parking space is smaller than a driver judgment reference value and the electronic hand brake is in a non-braking state, generating the braking instruction;
and controlling the work of the electronic hand brake to emergently brake the vehicle based on the brake instruction.
7. The vehicle speed control method of an automobile according to claim 1, characterized by further comprising:
acquiring an automatic cruise instruction;
acquiring voice information in the vehicle;
analyzing the voice information in the vehicle, and identifying voice character information in the voice information in the vehicle, wherein the voice character information comprises safety characters and vehicle speed parameters;
when the safety words and the automobile speed parameters simultaneously appear in the voice word information, accessing an action instruction database, and calling a speed control instruction corresponding to the automobile speed parameters;
and controlling the speed of the automobile to be increased or decreased based on the speed control instruction so as to enable the running speed of the automobile to be consistent with the speed parameter of the automobile.
8. A vehicle speed control system of an automobile is characterized by comprising,
the reversing judgment module is used for acquiring reversing gear information;
the distance detection module is used for acquiring the distance data of the rear obstacle of the reversing radar;
the grade judging module is used for judging the safety grade of the automobile based on the rear obstacle distance data;
the speed limit module is used for calling a speed limit command corresponding to the safety level, and the speed limit command comprises a maximum allowable speed per hour;
and the vehicle speed control module is used for controlling the speed of the vehicle based on the speed limit command so that the vehicle runs within the maximum allowable speed per hour.
9. An intelligent terminal, comprising a memory and a processor, the memory having stored thereon a computer program that can be loaded by the processor and that executes the method according to any one of claims 1 to 7.
10. A computer-readable storage medium, in which a computer program is stored which can be loaded by a processor and which executes the method of any one of claims 1 to 7.
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| CN202111400439.XA CN114103968A (en) | 2021-11-19 | 2021-11-19 | Automobile speed control method and system |
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| CN202111400439.XA CN114103968A (en) | 2021-11-19 | 2021-11-19 | Automobile speed control method and system |
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