CN112061123B - Pulse signal-based new energy automobile constant speed control method and device - Google Patents
Pulse signal-based new energy automobile constant speed control method and device Download PDFInfo
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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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/14—Adaptive cruise control
- B60W30/143—Speed control
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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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
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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
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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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Abstract
The invention relates to a speed control technology, and discloses a pulse signal-based new energy automobile constant speed control method, which comprises the following steps: acquiring a historical speed set within a preset time length of a vehicle, and judging whether the vehicle runs at a constant speed according to the historical speed set; when the vehicle does not run at a constant speed, updating the historical speed set by using the current real-time speed of the vehicle until the vehicle is judged to run at the constant speed; calculating an average speed of the vehicle according to the historical speed set; fitting the real-time speed of the vehicle with the average speed to obtain a relation fitting signal of the average speed and the real-time speed; leading the relation fitting signal into a pre-constructed power supply network to obtain pulse current; and introducing the pulse current into the motor to obtain electromagnetic force, and keeping the vehicle to run at a constant speed by using the electromagnetic force. The invention also provides a new energy automobile constant speed control device, electronic equipment and a computer readable storage medium. The invention realizes the purpose of controlling the vehicle to run at a constant speed.
Description
Technical Field
The embodiment of the invention relates to the field of speed control, in particular to a pulse signal-based new energy automobile constant speed control method and device.
Background
The vehicle can keep running at a constant speed in the running process, and for example, when the vehicle passes through a smooth road section in heavy rain or snow weather, the vehicle is preferably ensured to run at a constant speed in order to prevent the vehicle from slipping. In a road section which needs to keep running at a constant speed for a long time, a driver needs to frequently control the speed of the vehicle, and the vehicle is not timely in response when an emergency occurs, so that accidents are easily caused.
At present, the main way of keeping the vehicle running at a constant speed is through the personal operation of a driver, but when the vehicle speed is controlled for too long time, the driver is easy to generate driving fatigue, and the driving safety is affected.
Disclosure of Invention
The invention aims to provide a pulse signal-based new energy automobile constant speed control method and device, and aims to automatically control the constant speed running of an automobile so as to solve the problem that when the speed control time is too long, a driver is easy to generate driving fatigue and the driving safety is influenced.
In order to solve the technical problem, an embodiment of the present invention provides a pulse signal-based new energy vehicle constant speed control method, including:
acquiring a historical speed set within a preset time length of a vehicle, and judging whether the vehicle runs at a constant speed within the preset time length according to the historical speed set;
when the vehicle does not run at a constant speed within the preset time length, acquiring the real-time speed of the vehicle and updating the speed data in the historical speed set according to the time sequence by using the real-time speed until the vehicle is judged to run at a constant speed within the preset time length;
calculating the average speed of the vehicle in the preset time length according to the historical speed set;
fitting the real-time speed of the vehicle with the average speed by using a pre-constructed virtual oscilloscope to obtain a fitting signal of the relation between the average speed and the real-time speed;
leading the relation fitting signal into a pre-constructed power supply network to obtain pulse current corresponding to the relation fitting signal;
and introducing the pulse current into a motor of the vehicle to obtain electromagnetic force corresponding to the pulse current, and changing the speed of the vehicle by using the electromagnetic force to keep the vehicle running at a constant speed.
Optionally, the determining, according to the historical speed set, whether the vehicle is running at a constant speed within the preset time period includes:
calculating a speed fluctuation value of the historical speed set;
judging whether the speed fluctuation value is within a preset fluctuation threshold range or not;
if the speed fluctuation value is within the fluctuation threshold value range, judging that the vehicle runs at a constant speed within the preset time length;
and if the speed fluctuation value is not within the fluctuation threshold value range, judging that the vehicle runs at a non-constant speed within the preset time length.
Optionally, the fitting the real-time speed of the vehicle with the average speed by using a pre-constructed virtual oscilloscope to obtain a relation fitting signal of the average speed and the real-time speed includes:
transmitting the average speed and the real-time speed to the virtual oscilloscope;
and fitting the average speed and the real-time speed by using a virtual oscilloscope to generate a relation fitting signal with the average speed as a baseline and the real-time speed as a fluctuation curve.
Optionally, the introducing the relationship fitting signal into a pre-constructed power supply network to obtain a pulse current corresponding to the relationship fitting signal includes:
leading the relation fitting signal into a numerical control rheostat connected with a power supply in the power supply network, and changing the resistance value of the numerical control rheostat by using the relation fitting signal;
and changing the voltage of the power supply by using the numerical control rheostat to obtain pulse current.
Optionally, the introducing the pulse current into a motor of a vehicle to obtain an electromagnetic force corresponding to the pulse current, and using the electromagnetic force to change a vehicle speed to keep the vehicle running at a constant speed includes:
generating an electromagnetic force using a magnet in the motor and the pulse current;
and generating a rotation moment by using the electromagnetic force, and controlling a tire rotating shaft of the vehicle according to the rotation moment until the vehicle speed becomes an average speed.
Optionally, the determining, according to the historical speed set, whether the vehicle is running at a constant speed within the preset time period further includes:
acquiring speed data of a vehicle speed instrument panel in real time, and storing the speed data into a pre-constructed database;
and acquiring the historical speed set within the preset time length from the database.
Optionally, the changing the vehicle speed by using the electromagnetic force until the vehicle speed becomes an average speed further includes:
and when the fact that the accelerator pedal or the brake pedal is pressed down is detected, the motor is interrupted until the fact that the vehicle runs at a constant speed is judged again, and then the motor is started.
In addition, the invention also provides a new energy automobile constant speed control device, which comprises:
the constant speed judging module is used for acquiring a historical speed set within a preset time length of a vehicle, judging whether the vehicle runs at a constant speed within the preset time length according to the historical speed set, and when the vehicle does not run at the constant speed within the preset time length, acquiring the real-time speed of the vehicle and updating the speed data in the historical speed set according to the time sequence by using the real-time speed until the vehicle is judged to run at the constant speed within the preset time length;
the speed calculation module is used for calculating the average speed of the vehicle in the preset time length according to the historical speed set;
the fitting module is used for fitting the real-time speed of the vehicle with the average speed by using a pre-constructed virtual oscilloscope to obtain a relation fitting signal of the average speed and the real-time speed;
and the vehicle speed control module is used for leading the relation fitting signal into a pre-constructed power supply network to obtain a pulse current corresponding to the relation fitting signal, leading the pulse current into a motor of the vehicle to obtain an electromagnetic force corresponding to the pulse current, and changing the vehicle speed by utilizing the electromagnetic force to keep the vehicle running at a constant speed.
According to the scheme, the relation signal between the implementation speed and the average speed is obtained by obtaining the real-time speed of the vehicle, the relation signal is converted into the current pulse signal through the power supply set, and when the engine receives the pulse current signal, the moment for promoting or blocking the vehicle motion is generated, so that the purpose of controlling the vehicle to be at a constant speed is achieved, and the problem that when the vehicle speed is controlled for too long time, a driver is easy to generate driving fatigue to affect the driving safety is solved.
Drawings
Fig. 1 is a schematic flow chart of a new energy vehicle constant speed control method according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart showing a detailed implementation of one of the steps in FIG. 1;
FIG. 3 is a schematic flow chart showing another step of FIG. 1;
fig. 4 is a schematic block diagram of a new energy vehicle constant speed control device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device of a new energy vehicle constant speed control method based on a pulse signal according to an embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a pulse signal-based new energy automobile constant speed control method. Fig. 1 is a schematic flow chart of vehicle constant speed control according to an embodiment of the present invention. The method may be performed by an apparatus, which may be implemented by software and/or hardware.
In this embodiment, the pulse signal-based new energy vehicle constant speed control method includes:
s1, obtaining a historical speed set within a preset time length of the vehicle, and judging whether the vehicle runs at a constant speed within the preset time length according to the historical speed set.
In a preferred embodiment of the present invention, all the historical speed sets of the vehicle may be stored in a pre-constructed database, and the historical speed sets within a preset time span with the current time as the ending time point may be extracted from the database. For example, if the current time is 11: 00, then the historical speed set may be from 10: 55: 00 to 11: 00: historical speed in five minutes between 00.
In detail, referring to fig. 2, in a preferred embodiment of the present invention, the determining whether the vehicle is running at a constant speed within the preset time period according to the historical speed set includes:
s11, calculating a speed fluctuation value of the historical speed set;
in detail, the speed fluctuation value refers to a difference value of an instantaneous speed and an average speed in the historical speed set.
For example: if the historical speed set is 60, 61, 62, then the average speed is 61, and their fluctuation values are-1, 0, 1.
S12, judging whether the speed fluctuation value is within a preset fluctuation threshold range;
in a preferred embodiment of the invention, the fluctuation threshold range may be, for example, [ -2,2 ].
S13, if all the speed fluctuation values are within the fluctuation threshold value range, judging that the vehicle runs at a constant speed within the preset time length;
and S14, if any one of the speed fluctuation values is not in the fluctuation threshold range, determining that the vehicle is not in constant speed running within the preset time length.
And the constant speed running is a running process with small speed value fluctuation. If the speed fluctuation value is within the predetermined fluctuation threshold value range, the driving at a constant speed can be determined. For example, a historical speed set of [ 63, 62, 64, 62, 63, 63, 65, 64, 62, 63(km/h) ] having an average speed of 63km/h and speed fluctuation values of [ 0, 1, 2, 1, 0, 0, 2, 1, 1, 0(km/h) ] respectively, and it can be determined that the historical speed set of [ 63, 62, 64, 62, 63, 63, 65, 64, 62, 63(km/h) ] is a constant speed travel, since it is found that the speed fluctuation values are all less than or equal to 2 km/h.
And S2, when the vehicle does not run at a constant speed within the preset time length, acquiring the real-time speed of the vehicle and updating the speed data in the historical speed set according to the time sequence by using the real-time speed until the vehicle is judged to run at a constant speed within the preset time length.
In one embodiment of the present invention, if the historical speed set is 10: 55: 00 to 11: 00: 00, time 11: 00: 01 real-time speed replacement of the vehicle obtained 10: 55: 00, obtained from 10: 55: 01 to 11: 00: speeds between 01 constitute the historical speed set.
And S3, calculating the average speed of the vehicle in the preset time length according to the historical speed set.
The average speed is the sum of the speeds per second of the historical speeds divided by the total time, e.g., the historical speed set is [56,55,54,55], then the corresponding average speed is calculated as V (average speed):
v (average speed) ═ 56+55+54+ 55)/4.
And S4, fitting the real-time speed of the vehicle with the average speed by using a pre-constructed virtual oscilloscope to obtain a relation fitting signal of the average speed and the real-time speed.
In detail, in the preferred embodiment of the present invention, before S4, the method further includes:
and a, transmitting the average speed and the real-time speed to the virtual oscilloscope.
And b, fitting the average speed and the real-time speed by using a virtual oscilloscope to generate a relation fitting signal with the average speed as a baseline and the real-time speed as a fluctuation curve.
And S5, leading the relation fitting signal into a pre-constructed power supply network to obtain a pulse current corresponding to the relation fitting signal.
The power supply network has the main principle of two groups of voltage direction power supplies except necessary circuits and resistors, wherein the voltage of one group of power supply A is constant, and the voltage of the other group of power supply B is connected with a numerical control rheostat.
In detail, referring to fig. 3, in the preferred embodiment of the present invention, the S5 includes:
s51, leading the relation fitting signal into a numerical control rheostat connected with a power supply in the power supply network, and changing the resistance value of the numerical control rheostat by using the relation fitting signal;
and S52, changing the voltage of the power supply by using the numerical control rheostat to obtain pulse current.
In the embodiment of the invention, the numerical control rheostat is connected with a power supply B in a power supply network, the resistance value of the numerical control rheostat is regulated and controlled according to the preset proportion according to the relation fitting signal, and if the real-time speed is 1km/h greater than the average speed in the relation fitting signal, the numerical control rheostat is increased by 100 ohms.
In the embodiment of the invention, when the real-time speed in the relation fitting signal is greater than the average speed, the resistance value of the numerical control rheostat is increased, the voltage of the power supply B is reduced by using the numerical control rheostat, and the power supply network generates negative pulse current through the interaction of the power supply A and the power supply B; and when the real-time speed in the relation fitting signal is less than the average speed, reducing the resistance value of the numerical control rheostat, increasing the voltage of the power supply B by using the numerical control rheostat, and enabling the power supply network to generate forward pulse current through the interaction of the power supply A and the power supply B.
And S6, introducing the pulse current into a motor of the vehicle to obtain electromagnetic force corresponding to the pulse current, and changing the vehicle speed by utilizing the electromagnetic force to keep the vehicle running at a constant speed.
In detail, in a preferred embodiment of the present invention, the obtaining of the electromagnetic force corresponding to the pulse current, and using the electromagnetic force to change a vehicle speed to keep a vehicle running at a constant speed includes:
c, generating electromagnetic force by using a magnet in the motor and the pulse current;
and d, generating a rotating moment by using the electromagnetic force, and controlling a tire rotating shaft of the vehicle according to the rotating moment.
Preferably, the rotating torque in the embodiment of the invention comprises a reverse rotating torque and a positive rotating torque, when a negative pulse current is generated, a reverse electromagnetic force is generated to generate a reverse rotating torque, a motor is used for blocking the movement of the vehicle, and the speed of the vehicle is reduced; when the positive pulse current is generated, the positive electromagnetic force is generated to generate the positive rotating torque, the motor is utilized to promote the vehicle to move, the vehicle speed is increased, and therefore the vehicle can run at a constant speed.
Further, in a preferred embodiment of the present invention, after the changing the vehicle speed by using the electromagnetic force and keeping the vehicle running at a constant speed, the method further includes:
and when the fact that the accelerator pedal or the brake pedal is pressed down is detected, the motor is interrupted until the fact that the vehicle runs at a constant speed is judged again, and then the motor is started.
In a preferred embodiment of the present invention, the power supply network, the vehicle speed instrument panel, the database, the virtual oscilloscope, and the motor form a vehicle speed control system, and when a vehicle reaches a standard of constant speed driving, the system is used to operate the motor to keep the vehicle at a constant speed. When the driver operates the accelerator or the brake, the motor is interrupted by the system, the control of the system on the vehicle is stopped, and when the vehicle reaches the standard of constant-speed running again, the motor is operated by the system to keep the vehicle at a constant speed.
Fig. 4 is a schematic block diagram of the pulse signal-based new energy vehicle constant speed control device according to the present invention.
The new energy automobile constant speed control device 100 can be installed in electronic equipment. According to the realized function, the new energy automobile constant speed control device 100 may include a constant speed judgment module 101, a speed calculation module 102, a fitting module 103, and a vehicle speed control module 104. A module according to the present invention, which may also be referred to as a unit, refers to a series of computer program segments that can be executed by a processor of an electronic device and that can perform a fixed function, and that are stored in a memory of the electronic device.
In the present embodiment, the functions regarding the respective modules/units are as follows:
the constant speed judging module 101 is configured to obtain a historical speed set within a preset time length of a vehicle, judge whether the vehicle is in constant speed running within the preset time length according to the historical speed set, and when the vehicle is not in constant speed running within the preset time length, obtain a real-time speed of the vehicle and update speed data in the historical speed set according to a time sequence by using the real-time speed until it is judged that the vehicle is in constant speed running within the preset time length;
the speed calculation module 102 is configured to calculate an average speed of the vehicle within the preset time length according to the historical speed set;
the fitting module 103 is configured to fit the real-time speed of the vehicle with the average speed by using a pre-constructed virtual oscilloscope, so as to obtain a fitting signal of a relationship between the average speed and the real-time speed;
the vehicle speed control module 104 is configured to introduce the relationship fitting signal into a pre-constructed power supply network to obtain a pulse current corresponding to the relationship fitting signal, introduce the pulse current into a motor of a vehicle to obtain an electromagnetic force corresponding to the pulse current, and change a vehicle speed by using the electromagnetic force to keep the vehicle running at a constant speed.
The module in the device that this application provided can be based on in the use with foretell new energy automobile based on pulse signal at the uniform velocity control method the same, utilize at the uniform velocity judge module judges whether the vehicle is at the uniform velocity, utilizes speed calculation module obtains real-time speed with average speed, through the fitting module will real-time speed with average speed fits and converts into pulse current utilizes speed control module will pulse current converts moment into, solves speed of a motor vehicle control time overlength, and the driver produces driving fatigue easily, influences the problem of driving safety nature.
Fig. 5 is a schematic structural diagram of an electronic device for implementing the pulse signal-based new energy vehicle constant speed control method according to the present invention.
The electronic device 1 may include a processor 10, a memory 11 and a bus, and may further include a computer program, such as a vehicle constant speed control program 12, stored in the memory 11 and operable on the processor 10.
The memory 11 includes at least one type of readable storage medium, which includes flash memory, removable hard disk, multimedia card, card-type memory (e.g., SD or DX memory, etc.), magnetic memory, magnetic disk, optical disk, etc. The memory 11 may in some embodiments be an internal storage unit of the electronic device 1, such as a removable hard disk of the electronic device 1. The memory 11 may also be an external storage device of the electronic device 1 in other embodiments, such as a plug-in mobile hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the electronic device 1. Further, the memory 11 may also include both an internal storage unit and an external storage device of the electronic device 1. The memory 11 may be used not only to store application software installed in the electronic device 1 and various types of data, such as codes of the vehicle constant speed control program 12, but also to temporarily store data that has been output or is to be output.
The processor 10 may be composed of an integrated circuit in some embodiments, for example, a single packaged integrated circuit, or may be composed of a plurality of integrated circuits packaged with the same or different functions, including one or more Central Processing Units (CPUs), microprocessors, digital Processing chips, graphics processors, and combinations of various control chips. The processor 10 is a Control Unit (Control Unit) of the electronic device, connects various components of the electronic device by using various interfaces and lines, and executes various functions and processes data of the electronic device 1 by running or executing programs or modules (for example, executing a vehicle constant speed Control program and the like) stored in the memory 11 and calling data stored in the memory 11.
The bus may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. The bus is arranged to enable connection communication between the memory 11 and at least one processor 10 or the like.
Fig. 5 only shows an electronic device with components, and it will be understood by a person skilled in the art that the structure shown in fig. 5 does not constitute a limitation of the electronic device 1, and may comprise fewer or more components than shown, or a combination of certain components, or a different arrangement of components.
For example, although not shown, the electronic device 1 may further include a power supply (such as a battery) for supplying power to each component, and preferably, the power supply may be logically connected to the at least one processor 10 through a power management device, so as to implement functions of charge management, discharge management, power consumption management, and the like through the power management device. The power supply may also include any component of one or more dc or ac power sources, recharging devices, power failure detection circuitry, power converters or inverters, power status indicators, and the like. The electronic device 1 may further include various sensors, a bluetooth module, a Wi-Fi module, and the like, which are not described herein again.
Further, the electronic device 1 may further include a network interface, and optionally, the network interface may include a wired interface and/or a wireless interface (such as a WI-FI interface, a bluetooth interface, etc.), which are generally used for establishing a communication connection between the electronic device 1 and other electronic devices.
Optionally, the electronic device 1 may further comprise a user interface, which may be a Display (Display), an input unit (such as a Keyboard), and optionally a standard wired interface, a wireless interface. Alternatively, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, or the like. The display, which may also be referred to as a display screen or display unit, is suitable for displaying information processed in the electronic device 1 and for displaying a visualized user interface, among other things.
It is to be understood that the described embodiments are for purposes of illustration only and that the scope of the appended claims is not limited to such structures.
The vehicle uniform speed control program 12 stored in the memory 11 of the electronic device 1 is a combination of a plurality of instructions, and when running in the processor 10, can realize:
acquiring a historical speed set within a preset time length of a vehicle, and judging whether the vehicle runs at a constant speed within the preset time length according to the historical speed set;
when the vehicle does not run at a constant speed within the preset time length, acquiring the real-time speed of the vehicle and updating the speed data in the historical speed set according to the time sequence by using the real-time speed until the vehicle is judged to run at a constant speed within the preset time length;
calculating the average speed of the vehicle in the preset time length according to the historical speed set;
fitting the real-time speed of the vehicle with the average speed by using a pre-constructed virtual oscilloscope to obtain a fitting signal of the relation between the average speed and the real-time speed;
leading the relation fitting signal into a pre-constructed power supply network to obtain pulse current corresponding to the relation fitting signal;
and introducing the pulse current into a motor of the vehicle to obtain electromagnetic force corresponding to the pulse current, and changing the speed of the vehicle by using the electromagnetic force to keep the vehicle running at a constant speed.
Further, the integrated modules/units of the electronic device 1, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. The computer-readable medium may include: any entity or device capable of carrying said computer program code, recording medium, U-disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM).
Further, the computer usable storage medium may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store created data, etc.
Claims (1)
1. A new energy automobile constant speed control method based on pulse signals is characterized by comprising the following steps:
acquiring speed data of a vehicle speed instrument panel in real time, and storing the speed data into a pre-constructed database; acquiring a historical speed set within a preset time length from the database; judging whether the vehicle runs at a constant speed within the preset time length according to the historical speed set, wherein the judging step comprises the following steps: calculating a speed fluctuation value of the historical speed set; judging whether the speed fluctuation value is within a preset fluctuation threshold range or not; if the speed fluctuation value is within the fluctuation threshold value range, judging that the vehicle runs at a constant speed within the preset time length; if the speed fluctuation value is not within the fluctuation threshold value range, judging that the vehicle runs at a non-constant speed within the preset time length;
when the vehicle does not run at a constant speed within the preset time length, acquiring the real-time speed of the vehicle and updating the speed data in the historical speed set according to the time sequence by using the real-time speed until the vehicle is judged to run at a constant speed within the preset time length;
calculating the average speed of the vehicle in the preset time length according to the historical speed set;
fitting the real-time speed of the vehicle with the average speed by using a pre-constructed virtual oscilloscope to obtain a relation fitting signal of the average speed and the real-time speed, wherein the method comprises the following steps: transmitting the average speed and the real-time speed to the virtual oscilloscope; fitting the average speed and the real-time speed by using a virtual oscilloscope to generate a relation fitting signal with the average speed as a baseline and the real-time speed as a fluctuation curve;
leading the relation fitting signal into a pre-constructed power supply network to obtain a pulse current corresponding to the relation fitting signal, and the method comprises the following steps: leading the relation fitting signal into a numerical control rheostat connected with a power supply in the power supply network, and changing the resistance value of the numerical control rheostat by using the relation fitting signal; changing the voltage of the power supply by using the numerical control rheostat to obtain pulse current, wherein the power supply network at least comprises a circuit, a resistor and two groups of voltage direction power supplies, the voltage of one group of power supply A is constant, the voltage of the other group of power supply B is connected with one numerical control rheostat, when the real-time speed in the relation fitting signal is higher than the average speed, the resistance value of the numerical control rheostat is increased, the voltage of the power supply B is reduced by using the numerical control rheostat, and the power supply network generates negative pulse current through the interaction of the power supply A and the power supply B; when the real-time speed in the relation fitting signal is smaller than the average speed, reducing the resistance value of the numerical control rheostat, increasing the voltage of the power supply B by using the numerical control rheostat, and enabling the power supply network to generate forward pulse current through the interaction of the power supply A and the power supply B;
leading the pulse current into a motor of a vehicle to obtain electromagnetic force corresponding to the pulse current, changing the vehicle speed by utilizing the electromagnetic force, and keeping the vehicle running at a constant speed, wherein the method comprises the following steps: generating an electromagnetic force using a magnet in the motor and the pulse current; generating a rotation moment by using the electromagnetic force, and controlling a tire rotating shaft of the vehicle according to the rotation moment until the vehicle speed becomes an average speed; and when the fact that the accelerator pedal or the brake pedal is pressed down is detected, the motor is interrupted until the fact that the vehicle runs at a constant speed is judged again, and then the motor is started.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010829737.XA CN112061123B (en) | 2020-08-18 | 2020-08-18 | Pulse signal-based new energy automobile constant speed control method and device |
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