WO2024082590A1 - 调整跟车状态的预测时间确定方法、装置及设备 - Google Patents

调整跟车状态的预测时间确定方法、装置及设备 Download PDF

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Publication number
WO2024082590A1
WO2024082590A1 PCT/CN2023/090403 CN2023090403W WO2024082590A1 WO 2024082590 A1 WO2024082590 A1 WO 2024082590A1 CN 2023090403 W CN2023090403 W CN 2023090403W WO 2024082590 A1 WO2024082590 A1 WO 2024082590A1
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WIPO (PCT)
Prior art keywords
vehicle
distance
driving speed
time
following
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PCT/CN2023/090403
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English (en)
French (fr)
Inventor
张春雷
宋振垒
彭佳厚
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上海洛轲智能科技有限公司
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Priority claimed from CN202211274805.6A external-priority patent/CN115465273B/zh
Priority claimed from CN202211273976.7A external-priority patent/CN115556749B/zh
Application filed by 上海洛轲智能科技有限公司 filed Critical 上海洛轲智能科技有限公司
Publication of WO2024082590A1 publication Critical patent/WO2024082590A1/zh

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W30/00Purposes 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
    • B60W30/14Adaptive cruise control
    • B60W30/16Control of distance between vehicles, e.g. keeping a distance to preceding vehicle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W30/00Purposes 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
    • B60W30/14Adaptive cruise control
    • B60W30/16Control of distance between vehicles, e.g. keeping a distance to preceding vehicle
    • B60W30/165Automatically following the path of a preceding lead vehicle, e.g. "electronic tow-bar"
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W40/00Estimation 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
    • B60W40/10Estimation 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
    • B60W40/105Speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W40/00Estimation 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
    • B60W40/10Estimation 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
    • B60W40/107Longitudinal acceleration
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT 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
    • B60W60/00Drive control systems specially adapted for autonomous road vehicles

Definitions

  • the present application belongs to the field of vehicle control, and in particular, relates to a method, device and equipment for determining a predicted time for adjusting a following vehicle state.
  • the adaptive cruise control system needs to control the distance between the vehicle and the vehicle in front to be greater than the safe distance.
  • the adaptive cruise system needs to adjust the following status. Normally, the adaptive cruise system needs to complete the adjustment of the following status within a pre-set prediction time.
  • the embodiments of the present application provide a method, device, equipment and computer storage medium for determining the predicted time for adjusting the following vehicle status, which can adjust the predicted time for the following vehicle status, improve user experience and enhance safety.
  • an embodiment of the present application provides a method for determining a predicted time for adjusting a following vehicle state, the method comprising:
  • a vehicle is travelling behind a second vehicle;
  • the prediction time is determined according to the target speed parameter and the target distance parameter.
  • determining a target speed parameter according to the first driving speed and the second driving speed specifically includes:
  • the ratio of the relative speed to the first driving speed is calculated to obtain a target speed parameter.
  • the target distance parameter is determined according to the expected following distance and the vehicle distance, specifically including:
  • the prediction time is determined according to the target speed parameter and the target distance parameter, specifically including:
  • the initial prediction time is corrected to obtain the prediction time.
  • the initial prediction time is corrected to obtain the prediction time, specifically including:
  • the smaller of the intermediate prediction time and the maximum prediction time is determined as the prediction time.
  • the intermediate prediction time is determined according to the minimum prediction time and the initial prediction time, specifically including:
  • the sum of the weighted value and the initial prediction time is taken as the intermediate prediction time.
  • the method further includes:
  • the method further includes:
  • the step of obtaining the prediction period, the prediction time, the first driving speed of the first vehicle, the second driving speed of the second vehicle, the expected following distance and the vehicle distance between the first vehicle and the second vehicle is returned.
  • the following conditions include:
  • the first driving speed is equal to the second driving speed, and the expected following distance is equal to the vehicle distance.
  • determining the minimum acceleration within the prediction time according to the prediction time, the first driving speed, the second driving speed, the expected following distance, and the vehicle distance includes:
  • the smallest sub-acceleration among several sub-accelerations is determined as the minimum acceleration within the prediction time.
  • the durations of the several prediction sub-times are all equal.
  • sub-accelerations corresponding to several predicted sub-times are determined respectively, specifically including:
  • an embodiment of the present application provides a device for determining a predicted time for adjusting a following vehicle state, the device comprising:
  • an acquisition unit configured to acquire an expected following distance, a first driving speed of the first vehicle, a second driving speed of the second vehicle, and a distance between the first vehicle and the second vehicle, wherein the first vehicle and the second vehicle are traveling in the same lane and the first vehicle is traveling behind the second vehicle;
  • a first determining unit configured to determine a target speed parameter according to the first driving speed and the second driving speed
  • a second determination unit is used to determine a target distance parameter according to an expected following distance and a vehicle distance
  • the prediction time unit is used to determine the prediction time according to the target speed parameter and the target distance parameter.
  • an embodiment of the present application provides a device for determining a predicted time for adjusting a following vehicle state, the device comprising:
  • the processor executes the computer program instructions, it implements the method for determining the predicted time for adjusting the following vehicle state as in the first aspect and any optional method in the first aspect.
  • an embodiment of the present application provides a computer storage medium, on which computer program instructions are stored.
  • the computer program instructions are executed by a processor, a method for determining the predicted time for adjusting the following vehicle status as in the first aspect and any optional method in the first aspect is implemented.
  • an embodiment of the present application provides a computer program product.
  • the instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes a method for determining the predicted time for adjusting the following vehicle status such as the first aspect and any optional method in the first aspect.
  • the embodiment of the present application provides a method, device, equipment and computer storage medium for determining the predicted time for adjusting the following vehicle state.
  • the predicted time is determined according to a target speed parameter and a target distance parameter
  • the target speed parameter is determined according to a first driving speed of a first vehicle and a second driving speed of a second vehicle followed by the first vehicle
  • the target distance parameter is determined according to an expected following distance and the distance between the two vehicles
  • the predicted time is determined according to the speed of the two vehicles, the expected following distance and the actual distance, and the expected following distance is related to safety, and the speed and distance are safety factors, so the predicted time obtained thereby can take into account both safety and comfort.
  • FIG1 is a flow chart of a method for determining a predicted time for adjusting a following vehicle state provided by an embodiment of the present application
  • FIG2 is a flow chart of a method for determining a predicted time for adjusting a following vehicle state provided by another embodiment of the present application;
  • FIG3 is a flow chart of a method for adjusting a vehicle following state provided by an embodiment of the present application.
  • FIG4 is a flow chart of a method for adjusting a following vehicle state according to another embodiment of the present application.
  • FIG5 is a schematic diagram of the structure of a device for determining a predicted time for adjusting a following vehicle state provided by an embodiment of the present application;
  • FIG6 is a schematic diagram of the structure of a device for determining the predicted time for adjusting the following vehicle state provided by an embodiment of the present application.
  • the adaptive cruise control system may use the reverse method to quickly increase the distance and determine that the distance is equal to the safe distance within the predicted time.
  • the first vehicle and the second vehicle are driving in the same lane, the first vehicle is driving behind the second vehicle, the distance between the first vehicle and the second vehicle is 10 meters (m), the second vehicle is traveling at a speed of 20 kilometers per hour (km/h), the first vehicle is traveling at a speed of 50km/h, the predicted time is 5 seconds (s), and the safe distance is 30m.
  • the first vehicle takes 2s to decelerate, and the speed is reduced to 0km/h. At this time, the distance is 10m.
  • the adaptive cruise control system of the first vehicle may control the first vehicle to reverse, thereby increasing the distance between the first vehicle and the second vehicle.
  • reversing on the road poses a great safety hazard and may violate traffic regulations, reducing the user experience. method.
  • the safe distance refers to the necessary distance that the rear vehicle maintains from the front vehicle during driving in order to avoid an accidental collision with the front vehicle.
  • the safe distance is usually determined according to the vehicle's driving speed.
  • the vehicle is driving at high speed, that is, the driving speed is greater than or equal to 100 kilometers per hour (km/h)
  • the safe distance is greater than or equal to 100 meters (m).
  • the vehicle is driving fast, that is, the driving speed is greater than or equal to 60 kilometers per hour (km/h)
  • the safe distance is equal to the absolute value of the driving speed, in meters.
  • the adaptive cruise system of the first vehicle determines that the safe distance is 30m based on the second vehicle's driving speed of 20km/h.
  • the embodiments of the present application provide a method, device, equipment and computer storage medium for determining the predicted time for adjusting the following state. The following first introduces the method for determining the predicted time for adjusting the following state provided in the embodiments of the present application.
  • Fig. 1 shows a flow chart of a method for determining the predicted time for adjusting the following vehicle state provided by an embodiment of the present application.
  • the method for determining the predicted time for adjusting the following vehicle state provided by an embodiment of the present application includes the following steps: S101 to S104.
  • S101 Obtaining an expected following distance, a first driving speed of a first vehicle, a second driving speed of a second vehicle, and a distance between the first vehicle and the second vehicle, wherein the first vehicle and the second vehicle are traveling in the same lane and the first vehicle is traveling behind the second vehicle.
  • the method for determining the time for adjusting the following vehicle status can be executed by the vehicle control center of the first vehicle, or by a device such as a cloud server connected to the first vehicle.
  • the present application does not limit which device is executed, and it can be set as needed.
  • the method for determining the time for adjusting the following vehicle status is taken as an example to explain in detail the method for determining the time for adjusting the following vehicle status by the vehicle control center.
  • the vehicle When following a vehicle, the vehicle needs to maintain a safe distance from the vehicle in front, that is, the distance between the vehicle and the vehicle in front is equal to the safe distance.
  • the safe distance is greater than or equal to 100 meters (m).
  • the driving speed is greater than or equal to 60 kilometers per hour (km/h)
  • the safe distance is equal to the absolute value of the driving speed, in meters.
  • the following state can be adjusted in a short time to ensure that the distance is the same as the safe distance.
  • the vehicle and the vehicle ahead have the same speed and the gap between the vehicle and the safe distance is large, it will take a longer time to adjust the following state to ensure that the distance is the same as the safe distance.
  • the first vehicle and the second vehicle are traveling in the same lane, the first vehicle is traveling behind the second vehicle, the speeds of the first vehicle and the second vehicle are both 100 km/h, the distance between the first vehicle and the second vehicle is 10 m, and the safe distance is 100 m.
  • the first vehicle needs 10 seconds (s) to adjust the following state to ensure that the distance between it and the second vehicle is equal to the safe distance.
  • the third vehicle and the fourth vehicle are traveling in the same lane, the third vehicle is traveling behind the fourth vehicle, the speeds of the third vehicle and the fourth vehicle are both 100 km/h, the distance between the third vehicle and the fourth vehicle is 90 m, and the safe distance is 100 m.
  • the third vehicle only needs 3 seconds (s) to adjust the following state to ensure that the distance between it and the fourth vehicle is equal to the safe distance.
  • the following state can be adjusted in a relatively short time to ensure that the distance between the vehicles is equal to the safe distance and the speed of the vehicle and the vehicle ahead is the same.
  • the speed difference between the vehicle and the vehicle ahead is large and the distance between the vehicles is equal to the safe distance, it will take a longer time to adjust the following state to ensure that the distance between the vehicles is equal to the safe distance and the speed of the vehicle and the vehicle ahead is the same.
  • the fifth vehicle and the sixth vehicle are traveling in the same lane, the fifth vehicle is traveling behind the sixth vehicle, the fifth vehicle is traveling at a speed of 120 km/h, the sixth vehicle is traveling at a speed of 80 km/h, the distance between the fifth vehicle and the sixth vehicle is 100 m, and the safe distance is 100 m.
  • the fifth vehicle needs 10 seconds (s) to adjust the following state, so as to ensure that the speed is the same as that of the sixth vehicle, and the distance between the fifth vehicle and the sixth vehicle is equal to the safe distance.
  • the seventh vehicle and the eighth vehicle are traveling in the same lane, the seventh vehicle is traveling behind the eighth vehicle, the seventh vehicle is traveling at a speed of 81 km/h, the eighth vehicle is traveling at a speed of 80 km/h, the distance between the seventh vehicle and the eighth vehicle is 100 m, and the safe distance is 100 m.
  • the seventh vehicle only needs 3 seconds (s) to adjust the following state, so as to ensure that the speed is the same as that of the eighth vehicle, and the distance between the seventh vehicle and the eighth vehicle is equal to the safe distance.
  • data such as the first driving speed and the second driving speed may be obtained. This can determine the predicted time for adjusting the following vehicle status.
  • the vehicle control center can obtain the first driving speed of the first vehicle, the second driving speed of the second vehicle, the distance between the first vehicle and the second vehicle, and the expected following distance.
  • the vehicle control center is configured on the first vehicle, and the first vehicle and the second vehicle are traveling in the same lane, and the first vehicle is traveling behind the second vehicle.
  • the first driving speed of the first vehicle can be obtained by a speed sensor configured on the first vehicle
  • the second driving speed of the second vehicle and the distance between the first vehicle and the second vehicle can be obtained by a radar, an image sensor and other equipment configured on the first vehicle.
  • the application does not limit which equipment is used to obtain the first driving speed, the second driving speed and the distance between the first vehicle and the second vehicle, and can be set as needed.
  • the expected following distance can be pre-set, for example, the expected following distance is pre-set to 50m, 80m, 100m, etc.
  • the safe distance corresponding to the second driving speed can also be used as the expected following distance.
  • the expected following distance is 100m.
  • the second driving speed is 100km/h and the corresponding safe distance is 100m
  • the expected following distance is 100m.
  • the second driving speed is 20km/h and the corresponding safe distance is 30m, then the expected following distance is 30m.
  • the application does not limit how to determine the expected following distance, and can be set as needed.
  • the vehicle control center can obtain data such as the first driving speed and the second driving speed, so as to determine the predicted time for adjusting the following vehicle state according to the data such as the first driving speed and the second driving speed, thereby improving safety and enhancing user experience.
  • S102 Determine a target speed parameter according to the first driving speed and the second driving speed.
  • the greater the difference between the first driving speed of the first vehicle and the second driving speed of the second vehicle the longer the time required to adjust the following state.
  • the fifth vehicle and the sixth vehicle are driving in the same lane, the fifth vehicle is driving behind the sixth vehicle, the fifth vehicle is driving at a speed of 120km/h, the sixth vehicle is driving at a speed of 80km/h, the distance between the fifth vehicle and the sixth vehicle is 100m, and the safe distance is 100m.
  • the fifth vehicle needs 10 seconds (s) to adjust the following state, so as to ensure that the speed is the same as that of the sixth vehicle, and the distance between the fifth vehicle and the sixth vehicle is equal to the safe distance.
  • the seventh vehicle and the eighth vehicle are driving in the same lane, the seventh vehicle is driving behind the eighth vehicle, the seventh vehicle is driving at a speed of 81km/h, the eighth vehicle is driving at a speed of 80km/h, the distance between the seventh vehicle and the eighth vehicle is 100m, and the safe distance is 100m.
  • the seventh vehicle only needs 3 seconds (s) to adjust the following state, thereby ensuring that the speed is the same as that of the eighth vehicle, and the distance between the seventh vehicle and the eighth vehicle is equal to the safe vehicle distance.
  • the vehicle control center can determine a target speed parameter, which is used to characterize the first driving The speed is different from the second driving speed.
  • the vehicle control center may determine the target speed parameter based on the first driving speed and the second driving speed. Wherein, when determining the target speed parameter, the vehicle control center may determine the difference between the first driving speed and the second driving speed as the relative speed. Then calculate the ratio of the relative speed to the first driving speed to obtain the target speed parameter. Alternatively, the vehicle control center may determine the difference between the first driving speed and the second driving speed as the relative speed. Then calculate the ratio of the relative speed to the second driving speed to obtain the target speed parameter. How to determine the target speed parameter specifically can be set as needed, and the present application does not limit it here.
  • the vehicle control center can determine a target speed parameter that represents the difference between the first driving speed and the second driving speed, so as to determine the predicted time for adjusting the following vehicle state through the target speed parameter, thereby improving safety and enhancing user experience.
  • the first vehicle and the second vehicle are traveling in the same lane, the first vehicle is traveling behind the second vehicle, the speeds of the first vehicle and the second vehicle are both 100km/h, the distance between the first vehicle and the second vehicle is 10m, and the safe distance is 100m.
  • the first vehicle needs 10 seconds (s) to adjust the following state, so as to ensure that the distance between it and the second vehicle is equal to the safe distance.
  • the third vehicle and the fourth vehicle are traveling in the same lane, the third vehicle is traveling behind the fourth vehicle, the speeds of the third vehicle and the fourth vehicle are both 100km/h, the distance between the third vehicle and the fourth vehicle is 90m, and the safe distance is 100m.
  • the third vehicle only needs 3 seconds (s) to adjust the following state, so as to ensure that the distance between it and the fourth vehicle is equal to the safe distance. .
  • the vehicle control center may determine a target distance parameter, which is used to characterize the difference between the vehicle distance and the expected following vehicle distance.
  • the vehicle control center may determine the target distance parameter based on the vehicle distance and the expected following distance. Wherein, when determining the target distance parameter, the vehicle control center may determine the difference between the vehicle distance and the expected following distance as the relative distance. Then calculate the ratio of the relative distance to the vehicle distance to obtain the target distance parameter. Alternatively, the vehicle control center may determine the difference between the vehicle distance and the expected following distance as the relative distance. Then calculate the ratio of the relative distance to the expected following distance to obtain the target distance parameter. How to determine the target distance parameter specifically can be set as needed, and the present application does not limit it here.
  • the vehicle control center can determine a target distance parameter that represents the difference between the vehicle distance and the expected following distance, so as to determine the predicted time for adjusting the following state through the target distance parameter, thereby improving safety and enhancing user experience.
  • S104 Determine the predicted time according to the target speed parameter and the target distance parameter.
  • the predicted time for adjusting the following vehicle state can be determined.
  • the vehicle control center may calculate the square of the target speed parameter to obtain the speed square parameter. And calculate the square of the target distance parameter to obtain the distance square parameter. Then calculate the sum of the speed square parameter and the distance square parameter to obtain the square parameter. Finally, calculate the arithmetic square root of the square parameter to obtain the predicted time in seconds.
  • t is the prediction time
  • A is the target speed parameter
  • B is the target distance parameter.
  • the vehicle control center can determine the predicted time for adjusting the following vehicle status according to the target speed parameter and the target distance parameter, so that the vehicle control center can control the vehicle's driving within the predicted time to complete the adjustment of the following vehicle status, taking into account both safety and comfort, thereby improving safety and enhancing user experience.
  • the predicted time is determined according to the target speed parameter and the target distance parameter
  • the target speed parameter is determined according to the first driving speed of the first vehicle and the second driving speed of the second vehicle followed by the first vehicle
  • the target distance parameter is determined according to the expected following distance and the distance between the two vehicles
  • the predicted time is determined according to the speed of the two vehicles, the expected following distance and the actual distance, and the expected following distance is related to safety, and the speed and distance are safety factors, so the predicted time obtained thereby can take into account both safety and comfort.
  • the present application also provides another implementation method for determining the predicted time for adjusting the following vehicle status. Please refer to the following embodiments for details.
  • S201 Obtaining an expected following distance, a first driving speed of a first vehicle, a second driving speed of a second vehicle, and a distance between the first vehicle and the second vehicle, wherein the first vehicle and the second vehicle are traveling in the same lane and the first vehicle is traveling behind the second vehicle.
  • S202 Determine a target speed parameter according to the first driving speed and the second driving speed.
  • S203 Determine a target distance parameter according to the expected following distance and the vehicle distance.
  • S204 Determine an initial prediction time according to the target speed parameter and the target distance parameter.
  • the vehicle control center may calculate the square of the target speed parameter to obtain the speed square parameter. And calculate the square of the target distance parameter to obtain the distance square parameter. Then calculate the sum of the speed square parameter and the distance square parameter to obtain the square parameter. Finally, calculate the arithmetic square root of the square parameter to obtain the initial prediction time, in seconds.
  • the vehicle control center may correct the initial predicted time to obtain the predicted time.
  • the vehicle control center can obtain the preset maximum prediction time and minimum prediction time of the first vehicle, and the minimum prediction time is less than the maximum prediction time. Then calculate the sum of the minimum prediction time and the initial prediction time to obtain the intermediate prediction time. Finally, from the intermediate prediction time and the maximum prediction time, determine the smaller one as the prediction time. That is, when it is determined that the intermediate prediction time is less than the maximum prediction time, the intermediate prediction time is determined to be the prediction time. When it is determined that the intermediate prediction time is greater than the maximum prediction time, the maximum prediction time is determined to be the prediction time. Of course, if the intermediate prediction time is equal to the maximum prediction time, the vehicle control center can determine the intermediate prediction time or the maximum prediction time as the prediction time.
  • the vehicle control center may obtain a preset maximum prediction time and a minimum prediction time of the first vehicle, wherein the minimum prediction time is less than the maximum prediction time.
  • the minimum prediction time is determined to be the prediction time.
  • the maximum prediction time is determined to be the prediction time.
  • the vehicle control center may obtain the preset maximum prediction time, minimum prediction time and weighted parameter of the first vehicle, wherein the minimum prediction time is less than the maximum prediction time.
  • the product of the weighted parameter and the initial prediction time is calculated to obtain a weighted value.
  • the sum of the weighted value and the initial prediction time is then calculated to obtain an intermediate prediction time.
  • the smaller one of the intermediate prediction time and the maximum prediction time is determined as the prediction time. That is, when it is determined that the intermediate prediction time is less than the maximum prediction time, the intermediate prediction time is determined to be the prediction time.
  • the maximum prediction time is determined to be the prediction time.
  • the vehicle control center may determine the intermediate prediction time or the maximum prediction time as the prediction time.
  • the vehicle control center may also adopt other methods to correct the initial prediction time to obtain the prediction time.
  • the specific method is not limited in this application and can be set as needed.
  • S201 to S203 are the same as S101 to S103 in the above embodiment, and for the sake of brevity, they are not described in detail here.
  • the vehicle control center can correct the results obtained according to the target speed parameter and the target distance parameter, so as to more accurately determine the predicted time for adjusting the following vehicle state.
  • Fig. 3 shows a flow chart of a following state adjustment method provided by an embodiment of the present application.
  • the following state adjustment method provided by the embodiment of the present application includes the following steps: S111 to S113.
  • S111 Obtain a prediction period, a prediction time, a first driving speed of a first vehicle, a second driving speed of a second vehicle, an expected following distance, and a distance between the first vehicle and the second vehicle, wherein the first vehicle and the second vehicle are traveling in the same lane and the first vehicle is traveling behind the second vehicle.
  • the following vehicle state adjustment method can be executed by the vehicle control center of the first vehicle, or by a device such as a cloud server connected to the first vehicle.
  • the present application does not limit which device is executed, and it can be set as needed.
  • the following vehicle state adjustment method is described in detail by taking the vehicle control center executing the following vehicle state adjustment method as an example.
  • the vehicle control center may also determine the minimum acceleration to achieve a significant deceleration in the initial stage of adjusting the following state, so as to reduce the possibility of reversing.
  • the vehicle control center may obtain the prediction time, the first driving speed of the first vehicle, the second driving speed of the second vehicle, the expected following distance, the distance between the first vehicle and the second vehicle, and the preset prediction period.
  • the first vehicle and the second vehicle are traveling in the same lane, and the first vehicle is traveling behind the second vehicle.
  • the first speed of the first vehicle can be obtained by a speed sensor configured on the first vehicle
  • the second speed of the second vehicle and the distance between the first vehicle and the second vehicle can be obtained by a radar, an image sensor and other equipment configured on the first vehicle.
  • the application does not limit which equipment is used to obtain the first speed, the second speed and the distance between the first vehicle and the second vehicle, and the equipment can be set as needed.
  • the expected following distance can be preset, for example, the expected following distance can be preset. The distance is 50m, 80m, 100m, etc.
  • the safe distance corresponding to the second driving speed can also be used as the expected following distance.
  • the expected following distance is determined to be 100m.
  • the second driving speed is 20km/h and the corresponding safe distance is 30m.
  • the expected following distance is determined to be 30m.
  • the predicted time is the time required to adjust the following state. For example, the first driving speed of the first vehicle is 80km/h, the second driving speed of the second vehicle is 80km/h, the distance is 20m, and the expected following distance is 80m.
  • the predicted time is 30s.
  • the predicted time may be pre-set or calculated based on data such as the first driving speed and the second driving speed. This application does not limit how to obtain the predicted time, and it may be set as needed.
  • the vehicle control center can obtain data such as the first driving speed and the second driving speed, so as to determine the driving acceleration of the first vehicle based on the first driving speed, the second driving speed and other data, thereby adjusting the following state of the first vehicle.
  • S112 Determine a minimum acceleration within a preset time according to the predicted time, the first driving speed, the second driving speed, the expected following distance, and the vehicle distance.
  • the minimum acceleration of the first vehicle in the process of adjusting the following state within the predicted time can be calculated.
  • the vehicle control center can calculate the predicted acceleration curve of the first vehicle in the process of adjusting the following state within the predicted time according to the predicted time, the first driving speed, the second driving speed, the expected following distance and the vehicle distance. Since there is a relatively mature calculation method for calculating the predicted acceleration curve in the prior art, for the sake of brevity, this application will not repeat it here.
  • the vehicle control center may also obtain the acceleration and jerk of the first vehicle, and calculate the predicted acceleration curve of the first vehicle adjusting the following state within the predicted time according to the predicted time, the first driving speed, the first vehicle acceleration, the first vehicle jerk, the second driving speed, the expected following distance and the vehicle distance.
  • the vehicle control center may use the minimum acceleration value within the prediction time in the prediction acceleration curve as the minimum acceleration within the prediction time.
  • the vehicle control center can determine the minimum acceleration of the first vehicle within the predicted time by calculating the predicted acceleration curve of the first vehicle in the process of adjusting the following state within the predicted time, so as to adjust the driving speed according to the minimum acceleration in subsequent steps, thereby adjusting the following state.
  • the vehicle control center after the vehicle control center determines the minimum acceleration, it can adjust the driving speed according to the minimum acceleration within the prediction period, thereby adjusting the following state. This can achieve a significant deceleration at the initial stage of adjusting the following state, increase the distance between the first vehicle and the second vehicle, and reduce the possibility that the vehicle control center controls the first vehicle to reverse to increase the distance.
  • the vehicle control center may control the first vehicle to adjust the driving speed according to the minimum acceleration and drive within the prediction period, thereby adjusting the following vehicle state.
  • the vehicle control center can realize a significant deceleration at the initial stage of adjusting the following state, increase the distance between the first vehicle and the second vehicle, and reduce the possibility that the vehicle control center controls the first vehicle to reverse to increase the distance.
  • the first driving speed of the first vehicle is significantly reduced at the initial stage of adjusting the following state, which is in line with the user's operation in adjusting the following state and improves the user experience.
  • the present application also provides another implementation method of adjusting the following vehicle status, please refer to the following embodiments for details.
  • FIG. 4 another implementation method of adjusting the following vehicle state provided by the present application includes the following steps:
  • S211 Obtain a prediction period, a prediction time, a first driving speed of the first vehicle, a second driving speed of the second vehicle, an expected following distance, and a distance between the first vehicle and the second vehicle, wherein the first vehicle and the second vehicle are traveling in the same lane and the first vehicle is traveling behind the second vehicle.
  • S212 Determine a minimum acceleration within a preset time according to the predicted time, the first driving speed, the second driving speed, the expected following distance, and the vehicle distance.
  • the vehicle control center can re-acquire the first driving speed of the first vehicle, the second driving speed of the second vehicle, the expected following distance, the A distance between the first vehicle and the second vehicle.
  • S215 Determine whether the first driving speed, the second driving speed, the expected following distance and the vehicle distance meet the following condition. If so, end the process; if not, execute S211.
  • the vehicle control center of the first vehicle can determine whether the following condition is met according to the first driving speed, the second driving speed, the expected following distance and the vehicle distance that are re-acquired. If so, the process ends and the following state of the first vehicle is adjusted. If not, step S211 is executed.
  • the following condition may be that the first driving speed is equal to the second driving speed, and the expected following distance is equal to the vehicle distance.
  • the ratio of the first driving speed to the second driving speed is in a preset first ratio interval, the first ratio interval is 0.9 to 1.1, and the ratio of the vehicle distance to the expected following distance is in a preset second ratio interval, the second ratio interval is 0.95 to 1.05.
  • Other following conditions may also be used, that is, the specific following condition may be set as needed, and this application does not limit this.
  • S211 to S213 are the same as S111 to S113 in the above embodiment, and for the sake of brevity, they will not be described in detail here.
  • the vehicle control center can redetermine the minimum acceleration when the adjustment of the following state of the first vehicle is not completed after a single prediction cycle ends, and continue to adjust the following state of the first vehicle according to the redetermined minimum acceleration.
  • the present application also provides another implementation method of following state adjustment, please refer to the following embodiments for details.
  • Another implementation method of adjusting the following vehicle status provided by the present application includes the following steps:
  • S301 Obtain a prediction period, a prediction time, a first driving speed of a first vehicle, a second driving speed of a second vehicle, an expected following distance, and a distance between the first vehicle and the second vehicle, wherein the first vehicle and the second vehicle are traveling in the same lane and the first vehicle is traveling behind the second vehicle.
  • S302 Determine a minimum acceleration within a preset time according to the predicted time, the first driving speed, the second driving speed, the expected following distance, and the vehicle distance.
  • the vehicle control center may obtain pre-set division parameters.
  • the vehicle control center can divide the predicted time into a number of predicted sub-times according to the division parameter.
  • the vehicle control center can randomly divide the predicted time into a number of predicted sub-times according to the division parameter.
  • the duration of each prediction sub-time may be equal to the duration of at least one of the other prediction sub-times, or may be unequal to the duration of the other prediction sub-times.
  • the vehicle control center may also divide the prediction time into a number of prediction sub-times of equal duration according to the division parameter. This application does not limit how to divide the prediction time according to the division parameter, and it can be set as needed.
  • the vehicle control center can calculate the sub-acceleration corresponding to each of the several predicted sub-times according to the predicted time, the first driving speed, the second driving speed, the expected following distance and the vehicle distance.
  • the vehicle control center may determine the predicted acceleration curve corresponding to the predicted time according to the predicted time, the first driving speed, the second driving speed, the expected following distance, and the vehicle distance. Then, for each predicted sub-time, the sub-acceleration curve corresponding to the predicted sub-time is determined from the predicted acceleration curve corresponding to the predicted time. The minimum value of the sub-acceleration curve is used as the sub-acceleration corresponding to the predicted sub-time.
  • the vehicle control center can also determine the first prediction sub-time, the second prediction sub-time, the third prediction sub-time, etc. from the plurality of prediction sub-times in order from first to last. Then, according to the first prediction sub-time, the first driving speed, the second driving speed, the expected following distance and the vehicle distance, determine the first acceleration curve corresponding to the first prediction sub-time and the following vehicle data at the end of the first prediction sub-time. At the same time, determine the minimum acceleration value in the first acceleration curve as the sub-acceleration corresponding to the first prediction sub-time.
  • the following vehicle data includes the real-time vehicle distance, the real-time first driving speed, the real-time second driving speed, etc.
  • the vehicle control center may determine the minimum sub-acceleration from the determined plurality of sub-accelerations, which is the minimum acceleration within the prediction time.
  • S301 is the same as S111 in the above embodiment, and S303 is the same as S113 in the above embodiment, and for the sake of brevity, they are not described in detail here.
  • the vehicle control center can more accurately determine the minimum acceleration of the first vehicle within the prediction period, thereby improving the efficiency of adjusting the following state of the first vehicle.
  • the present application also provides another implementation method of adjusting the following vehicle status, please refer to the following embodiments for details.
  • Another implementation method of adjusting the following vehicle status provided by the present application includes the following steps:
  • S401 Obtain a prediction period, a prediction time, a first driving speed of a first vehicle, a second driving speed of a second vehicle, an expected following distance, and a distance between the first vehicle and the second vehicle, wherein the first vehicle and the second vehicle are traveling in the same lane and the first vehicle is traveling behind the second vehicle.
  • S402 Determine a minimum acceleration within a preset time according to the predicted time, the first driving speed, the second driving speed, the expected following distance, and the vehicle distance.
  • the vehicle control center may calculate the predicted acceleration curve and the predicted speed curve of the first vehicle in the process of adjusting the following state within the predicted time according to the predicted time, the first driving speed, the second driving speed, the expected following distance and the vehicle distance.
  • the coordinate time corresponding to the coordinate point of the predicted speed curve with speed equal to 0 is determined, and the predicted time is re-determined according to the coordinate time, and the second driving speed is determined to be 0.
  • the predicted acceleration curve of the first vehicle in the process of adjusting the following state within the predicted time is calculated.
  • the minimum acceleration value in the predicted acceleration curve is determined as the minimum acceleration within the predicted time.
  • the minimum acceleration value in the predicted acceleration curve is determined as the minimum acceleration within the predicted time.
  • S401 is the same as S111 in the above embodiment, and S403 is the same as S113 in the above embodiment, and for the sake of brevity, they are not described in detail here.
  • the vehicle control center can further reduce the possibility of the first vehicle reversing.
  • the present application also provides a specific implementation of the device for determining the predicted time for adjusting the following vehicle state. Please refer to the following embodiment.
  • the device 500 for determining the predicted time for adjusting the following vehicle state includes the following units:
  • an acquisition unit 501 configured to acquire an expected following distance, a first driving speed of a first vehicle, a second driving speed of a second vehicle, and a distance between the first vehicle and the second vehicle, wherein the first vehicle and the second vehicle are traveling in the same lane and the first vehicle is traveling behind the second vehicle;
  • a first determining unit 502 is used to determine a target speed parameter according to the first driving speed and the second driving speed;
  • a second determining unit 503 is used to determine a target distance parameter according to an expected following distance and a vehicle distance;
  • the prediction time unit 504 is used to determine the prediction time according to the target speed parameter and the target distance parameter.
  • the acquisition unit 501 acquires the first vehicle driving speed, the second vehicle driving speed and other parameters, and then the first determination unit determines the target speed parameter representing the difference between the first driving speed and the second driving speed, and the second determination unit determines the target distance parameter representing the difference between the vehicle distance and the expected following distance. Finally, the prediction time unit determines the following state adjustment time according to the target speed parameter and the target distance parameter.
  • the above-mentioned device may further include: a first determination subunit.
  • the first determination subunit is used to determine the relative speed according to the first driving speed and the second driving speed, calculate the ratio of the relative speed to the first driving speed, and obtain the target speed parameter.
  • the above-mentioned device may further include: a second determination subunit.
  • the second determination subunit is used to determine the relative distance according to the expected following distance and the vehicle distance, calculate the ratio of the vehicle distance to the expected following distance, and obtain the target distance parameter.
  • the above-mentioned device may further include: a prediction time subunit.
  • the prediction time subunit is used to determine the initial prediction time according to the target speed parameter and the target distance parameter, and to correct the initial prediction time to obtain the prediction time.
  • the above-mentioned device may further include: a prediction time subunit.
  • the prediction time subunit is used to obtain the maximum prediction time and the minimum prediction time of the first vehicle, determine the intermediate prediction time according to the minimum prediction time and the initial prediction time, and determine the smaller of the intermediate prediction time and the maximum prediction time as the prediction time.
  • the above device further Can include: prediction time subunit.
  • the prediction time subunit is used to obtain a preset weighting parameter, determine the product of the minimum prediction time and the weighting parameter as a weighted value, and take the sum of the weighted value and the initial prediction time as the intermediate prediction time.
  • the device for determining the predicted time for adjusting the vehicle following state further includes: a driving unit.
  • the acquisition unit is also used to acquire the prediction period, the prediction time, the first driving speed of the first vehicle, the second driving speed of the second vehicle, the expected following distance, and the distance between the first vehicle and the second vehicle, wherein the first vehicle and the second vehicle are traveling in the same lane and the first vehicle is traveling behind the second vehicle.
  • the third determination unit is used to determine the minimum acceleration within a preset time according to the predicted time, the first driving speed, the second driving speed, the expected following distance and the vehicle distance.
  • the driving unit is used to drive at the minimum acceleration and adjust the following vehicle status within the prediction period.
  • the driving unit can control the first vehicle to travel at the minimum acceleration.
  • the minimum acceleration is the minimum acceleration within the predicted time determined by the acquisition unit and the third determination unit according to data such as the vehicle distance and the expected following distance.
  • Driving at the minimum acceleration can significantly reduce the first driving speed, thereby increasing the vehicle distance and reducing the possibility of reversing.
  • significantly reducing the first driving speed at the initial stage of adjusting the following state is in line with the driving habits of most users. Therefore, the above method can also improve the user experience.
  • the driving unit may specifically include: a driving sub-unit.
  • the driving subunit is used to obtain a first driving speed, a second driving speed, an expected following distance and a vehicle distance.
  • the driving subunit returns to execute the step of obtaining a prediction period, a prediction time, a first driving speed of the first vehicle, a second driving speed of the second vehicle, an expected following distance and a vehicle distance between the first vehicle and the second vehicle.
  • the driving unit may specifically include: a driving sub-unit.
  • the driving subunit is used for making the first driving speed equal to the second driving speed and for making the expected following vehicle distance equal to the vehicle distance.
  • the third determination unit may specifically include: a third determination subunit.
  • the third determination subunit is used to divide the predicted time into a number of predicted sub-times, and determine the sub-accelerations corresponding to the several predicted sub-times according to the predicted time, the first driving speed, the second driving speed, the expected following distance and the vehicle distance, and determine the minimum sub-acceleration among the several sub-accelerations as the minimum acceleration within the predicted time.
  • the third determination unit may specifically include: a third determination subunit.
  • the third determination subunit is used to make the durations of the plurality of prediction sub-times equal.
  • the third determination unit may specifically include: a third determination subunit.
  • the third determination subunit is used to determine the predicted acceleration curve corresponding to the predicted time according to the predicted time, the first driving speed, the second driving speed, the expected following distance and the vehicle distance, and for each predicted sub-time, determine the sub-acceleration curve corresponding to the predicted sub-time in the predicted acceleration curve, and determine the minimum value of the sub-acceleration curve, which is the sub-acceleration corresponding to the predicted sub-time.
  • FIG6 shows a schematic diagram of the hardware structure of a device for determining a predicted time for adjusting a following vehicle state provided in an embodiment of the present application.
  • the device 600 for determining the predicted time for adjusting the following vehicle state may include a processor 601 and a memory 602 storing computer program instructions.
  • the above-mentioned processor 601 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • the memory 602 may include a large capacity memory for data or instructions.
  • the memory 602 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these.
  • the memory 602 may include a removable or non-removable (or fixed) medium.
  • the memory 602 may be inside or outside the integrated gateway disaster recovery device.
  • the memory 602 is a non-volatile solid-state memory.
  • the memory may include read-only memory (ROM), random access memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical or other physical/tangible memory storage devices.
  • ROM read-only memory
  • RAM random access memory
  • magnetic disk storage media devices magnetic disk storage media devices
  • optical storage media devices flash memory devices
  • electrical, optical or other physical/tangible memory storage devices the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed, the software is executed. When executed (eg, by one or more processors), it is operable to perform the operations described with reference to a method according to an aspect of the present disclosure.
  • the processor 601 reads and executes the computer program instructions stored in the memory 602 to implement any one of the methods for determining the predicted time for adjusting the following vehicle state in the above embodiments.
  • the device for determining the predicted time for adjusting the following vehicle state may further include a communication interface 603 and a bus 610. As shown in FIG6 , the processor 601, the memory 602, and the communication interface 603 are connected via the bus 610 and communicate with each other.
  • the communication interface 603 is mainly used to implement communication between various modules, devices, units and/or equipment in the embodiments of the present application.
  • Bus 610 includes hardware, software or both, and the components of the prediction time determination device for adjusting the following state are coupled to each other.
  • the bus may include an accelerated graphics port (AGP) or other graphics bus, an enhanced industrial standard architecture (EISA) bus, a front-end bus (FSB), a hypertransport (HT) interconnect, an industrial standard architecture (ISA) bus, an infinite bandwidth interconnect, a low pin count (LPC) bus, a memory bus, a microchannel architecture (MCA) bus, a peripheral component interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a serial advanced technology attachment (SATA) bus, a video electronics standard association local (VLB) bus or other suitable bus or a combination of two or more of these.
  • bus 610 may include one or more buses.
  • the device for determining the predicted time for adjusting the following vehicle status can execute the method for determining the predicted time for adjusting the following vehicle status in the embodiment of the present application, thereby achieving the corresponding technical effect of the method for determining the predicted time for adjusting the following vehicle status provided in the embodiment of the present application or the method for adjusting the following vehicle status provided in the embodiment of the present application.
  • the embodiments of the present application may provide a computer storage medium for implementation.
  • the computer storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any of the methods for determining the predicted time for adjusting the following state in the above embodiments or the method for adjusting the following state provided in the embodiments of the present application are implemented.
  • the functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof.
  • it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc.
  • ASIC application specific integrated circuit
  • the elements of the present application are programs or code segments that are used to perform the required tasks.
  • the program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave.
  • "Machine-readable medium" can include any medium capable of storing or transmitting information.
  • machine-readable media examples include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc.
  • the code segment can be downloaded via a computer network such as the Internet, an intranet, etc.
  • each box in the flowchart and/or block diagram and the combination of each box in the flowchart and/or block diagram can be implemented by computer program instructions.
  • These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the function/action specified in one or more boxes of the flowchart and/or block diagram.
  • Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It can also be understood that each box in the block diagram and/or flowchart and the combination of boxes in the block diagram and/or flowchart can also be implemented by dedicated hardware that performs a specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

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Abstract

一种调整跟车状态的预测时间确定方法,包括:获取期望跟车距离、第一行驶速度、第二行驶速度以及该第一车辆与该第二车辆之间的车距(S101);根据该第一行驶速度以及该第二行驶速度,确定目标速度参数(S102);根据期望跟车距离以及车距,确定目标距离参数(S103);根据该目标速度参数以及该目标距离参数,确定预测时间(S104)。预测时间根据目标速度参数以及目标距离参数确定,目标速度参数根据第一行驶速度以及第二行驶速度确定,目标距离参数根据期望跟车距离以车距确定,提升了用户体验和安全性。还涉及一种装置(500)、设备(600)、计算机可读存储介质、计算机程序产品和车辆。

Description

调整跟车状态的预测时间确定方法、装置及设备
相关申请的交叉引用
本申请主张2022年10月18日在中国提交的中国专利申请202211274805.6和2022年10月18日在中国提交的中国专利申请202211273976.7的优先权,其全部内容通过引用包含于此。
技术领域
本申请属于车辆控制领域,尤其涉及一种调整跟车状态的预测时间确定方法、装置及设备。
背景技术
随着自动驾驶领域各种技术的蓬勃发展,人们越来越依赖车辆的自适应巡航系统。车辆在跟车行驶过程中,自适应巡航系统需要控制车辆与前方车辆之间的距离大于安全距离。
当车辆与前方的车辆距离过近时,存在安全隐患,于是,自适应巡航系统需要调整跟车状态,通常情况下,自适应巡航系统需要在预先设置的预测时间内完成跟车状态的调整。
但是,由于车辆在行驶过程中需要面对复杂的车况、路况,在该预测时间内完成跟车状态的调整,难以兼顾安全性与舒适性,且用户体验差。因此,亟需一种调整跟车状态的预测时间确定方法、装置及设备。
发明内容
本申请实施例提供一种在调整跟车状态的预测时间确定方法、装置、设备及计算机存储介质,能够调整跟车状态的预测时间,提升用户体验,提高安全性。
第一方面,本申请实施例提供一种调整跟车状态的预测时间确定方法,方法包括:
获取期望跟车距离、第一车辆的第一行驶速度、第二车辆的第二行驶速度以及第一车辆与第二车辆之间的车距,其中,第一车辆以及第二车辆行驶于同一车道,且第 一车辆在第二车辆后方行驶;
根据第一行驶速度以及第二行驶速度,确定目标速度参数;
根据期望跟车距离以及车距,确定目标距离参数;
根据目标速度参数以及目标距离参数,确定预测时间。
可选地,根据第一行驶速度以及第二行驶速度,确定目标速度参数,具体包括:
根据第一行驶速度以及第二行驶速度,确定相对速度;
计算相对速度与第一行驶速度的比值,得到目标速度参数。
可选地,根据期望跟车距离以及车距,确定目标距离参数,具体包括:
根据期望跟车距离以及车距,确定相对距离;
计算车距与期望跟车距离的比值,得到目标距离参数。
可选地,根据目标速度参数以及目标距离参数,确定预测时间,具体包括:
根据目标速度参数以及目标距离参数,确定初始预测时间;
对初始预测时间进行修正,得到预测时间。
可选地,对初始预测时间进行修正,得到预测时间,具体包括:
获取第一车辆的最大预测时间以及最小预测时间;
根据最小预测时间以及初始预测时间,确定中间预测时间;
将中间预测时间与最大预测时间中的较小者确定为预测时间。
可选地,根据最小预测时间以及初始预测时间,确定中间预测时间,具体包括:
获取预设的加权参数;
确定最小预测时间与加权参数的乘积,作为加权值;
将加权值与初始预测时间的和,作为中间预测时间。
可选地,在根据目标速度参数以及目标距离参数,确定预测时间之后,方法还包括:
获取预测周期、预测时间、第一车辆的第一行驶速度、第二车辆的第二行驶速度、期望跟车距离以及第一车辆与第二车辆之间的车距;
根据预测时间、第一行驶速度、第二行驶速度、期望跟车距离以及车距,确定预测时间内的最小加速度;
在预测周期内,按照最小加速度行驶,调整跟车状态。
可选地,调整跟车状态之后,方法还包括:
获取第一行驶速度、第二行驶速度、期望跟车距离以及车距;
当根据第一行驶速度、第二行驶速度、期望跟车距离以及车距,确定不满足跟车条件时,返回执行获取预测周期、预测时间、第一车辆的第一行驶速度、第二车辆的第二行驶速度、期望跟车距离以及第一车辆与第二车辆之间的车距的步骤。
可选地,跟车条件包括:
第一行驶速度与第二行驶速度相等,且期望跟车距离与车距相等。
可选地,根据预测时间、第一行驶速度、第二行驶速度、期望跟车距离以及车距,确定预测时间内的最小加速度,具体包括:
将预测时间划分为若干预测子时间;
根据预测时间、第一行驶速度、第二行驶速度、期望跟车距离以及车距,分别确定若干预测子时间对应的子加速度;
将若干子加速度中确定最小的子加速度,作为预测时间内的最小加速度。
可选地,若干预测子时间的时长均相等。
可选地,根据预测时间、第一行驶速度、第二行驶速度、期望跟车距离以及车距,分别确定若干预测子时间对应的子加速度,具体包括:
根据预测时间、第一行驶速度、第二行驶速度、期望跟车距离以及车距,确定预测时间对应的预测加速度曲线;
针对每个预测子时间,确定预测加速度曲线中对应该预测子时间的子加速度曲线;
确定子加速度曲线的最小值,为该预测子时间对应的子加速度。
第二方面,本申请实施例提供了一种调整跟车状态的预测时间确定装置,装置包括:
获取单元,用于获取期望跟车距离、第一车辆的第一行驶速度、第二车辆的第二行驶速度以及第一车辆与第二车辆之间的车距,其中,第一车辆以及第二车辆行驶于同一车道,且第一车辆在第二车辆后方行驶;
第一确定单元,用于根据第一行驶速度以及第二行驶速度,确定目标速度参数;
第二确定单元,用于根据期望跟车距离以及车距,确定目标距离参数;
预测时间单元,用于根据目标速度参数以及目标距离参数,确定预测时间。
第三方面,本申请实施例提供了一种调整跟车状态的预测时间确定设备,设备包括:
处理器以及存储有计算机程序指令的存储器;
处理器执行计算机程序指令时实现如第一方面和第一方面中任一可选的调整跟车状态的预测时间确定方法。
第四方面,本申请实施例提供了一种计算机存储介质,计算机可读存储介质上存储有计算机程序指令,计算机程序指令被处理器执行时实现如第一方面和第一方面中任一可选的调整跟车状态的预测时间确定方法。
第五方面,本申请实施例提供了一种计算机程序产品,计算机程序产品中的指令由电子设备的处理器执行时,使得电子设备执行如第一方面和第一方面中任一可选的调整跟车状态的预测时间确定方法。
本申请实施例提供了一种调整跟车状态的预测时间确定方法、装置、设备及计算机存储介质。在本申请实施例中,预测时间根据目标速度参数以及目标距离参数确定,而目标速度参数是根据第一车辆的第一行驶速度以及第一车辆跟随的第二车辆的第二行驶速度确定,目标距离参数根据期望跟车距离以两车的车距确定,所以,预测时间是根据两车的车速,期望跟车距离和实际车距确定的,而期望跟车距离与安全相关,而车速和距离是安全性因素,所以,由此得到的预测时间能够兼顾安全性和舒适性。
附图说明
为了更清楚地说明本申请实施例的技术方案,下面将对本申请实施例中所需要使用的附图作简单的介绍,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1是本申请一个实施例提供的调整跟车状态的预测时间确定方法的流程示意图;
图2是本申请另一个实施例提供的调整跟车状态的预测时间确定方法的流程示意图;
图3是本申请一个实施例提供的跟车状态调整方法的流程示意图;
图4是本申请另一个实施例提供的跟车状态调整方法的流程示意图;
图5是本申请一个实施例提供的调整跟车状态的预测时间确定装置的结构示意图;
图6是本申请一个实施例提供的调整跟车状态的预测时间确定设备的结构示意图。
具体实施方式
下面将详细描述本申请的各个方面的特征和示例性实施例,为了使本申请的目的、技术方案及优点更加清楚明白,以下结合附图及具体实施例,对本申请进行进一步详细描述。应理解,此处所描述的具体实施例仅意在解释本申请,而不是限定本申请。对于本领域技术人员来说,本申请可以在不需要这些具体细节中的一些细节的情况下实施。下面对实施例的描述仅仅是为了通过示出本申请的示例来提供对本申请更好的理解。
需要说明的是,在本文中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括……”限定的要素,并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
通常情况下,启动自适应巡航系统的车辆在跟车行驶过程中,需要与行驶在前方的车辆保持一定的距离,减小追尾的可能。而当车辆与前方的车辆距离过近时,需要调整跟车状态,保障驾驶安全。并且,由于车辆在行驶过程中,道路情况瞬息万变,为了保障驾驶安全,尽快调整跟车状态,通常提前设置固定的预测时长,并在该预测时长内完成车辆状态的调整。
此外,当车辆与前方车辆的车距过小时,自适应巡航系统为了快速增大车距,确定在预测时间内车距等于安全车距,可能会采用倒车的方式。例如,第一车辆与第二车辆在同一车道行驶,该第一车辆行驶于该第二车辆后方,该第一车辆与该第二车辆之间的车距为10米(m),该第二车辆的行驶速度为20千米每小时(km/h),该第一车辆的行驶速度为50km/h,预测时间为5秒(s),安全车距为30m。该第一车辆耗时2s减速,行驶速度减为0km/h,这时,车距为10m,即使该第一车辆在剩余3s内静止,该第二车辆在3s内可行驶路程约为17m,3s后车距为27m,到达该预测时间,而车距仍然小于该安全车距30m。因此,该第一车辆的自适应巡航系统可能会控制该第一车辆倒车,从而增大与该第二车辆之间的车距。但是,在道路中倒车存在较大的安全隐患,且可能违反交通规则,降低用户的体验。于是,本申请公开了一种跟车状态调整 方法。
其中,安全车距是指后方车辆为了避免与前方车辆发生意外碰撞而在行驶中与前车所保持的必要间隔距离。安全车距通常根据车辆行驶速度确定。当车辆高速行驶时,即行驶速度大于或等于100千米每小时(km/h)时,安全车距大于或等于100米(m)。或者,当车辆快速行驶时,即行驶速度大于或等于60千米每小时(km/h)时,安全车距等于行驶速度的绝对值,单位m。在上例中,由于该第一车辆在该预测时间后跟随该第二车辆行驶,因此,该第一车辆的行驶速度应当与该第二车辆的行驶速度相同。于是,该第一车辆的自适应巡航系统根据该第二车辆的行驶速度20km/h,确定安全车距为30m。
但是,由于车辆在跟车行驶过程中,可能出现与前方车辆的距离较近的情况,这种情况下,车辆为了保证可在该调整时长内完成跟车状态的调整,通常会在短时间内大幅度加速/减速,降低用户体验,且在行驶过程中,执行短时间内大幅度加速/减速的操作,存在安全隐患。为了解决现有技术问题,本申请实施例提供了一种调整跟车状态的预测时间确定方法、装置、设备及计算机存储介质。下面首先对本申请实施例所提供的调整跟车状态的预测时间确定方法进行介绍。
图1示出了本申请一个实施例提供的调整跟车状态的预测时间确定方法的流程示意图。如图1所示,本申请实施例提供的调整跟车状态的预测时间确定方法包括以下步骤:S101至S104。
S101:获取期望跟车距离、第一车辆的第一行驶速度、第二车辆的第二行驶速度以及第一车辆与第二车辆之间的车距,其中,第一车辆以及第二车辆行驶于同一车道,且第一车辆在第二车辆后方行驶。
在本申请中,该跟车状态调整时间的确定方法可由该第一车辆的车辆控制中心执行,也可由与该第一车辆连接的云端服务器等设备执行,具体由何种设备执行,本申请不做限制,可根据需要设置。在本申请的一个或多个实施例中,为了便于说明,以车辆控制中心执行该跟车状态调整时间的确定方法为例,详细说明该跟车状态调整时间的确定方法。
车辆在跟车行驶过程中,需要与前方车辆保持安全车距,即,车辆与前方车辆之间的距离等于安全车距。例如,当车辆高速行驶时,即行驶速度大于或等于100千米每小时(km/h)时,安全车距大于或等于100米(m)。或者,当车辆快速行驶时,即行 驶速度大于或等于60千米每小时(km/h)时,安全车距等于行驶速度的绝对值,单位m。
而通常情况下,当车辆与前方车辆速度相同,车距与安全车距差距较小时,在较短时间内即可调整跟车状态,保证车距与安全距离相同。而如果车辆与前方车辆速度相同,车距与安全车距差距较大,则需要较长时间调整跟车状态,保证车距与安全距离相同。
例如,第一车辆与第二车辆行驶于同一车道内,该第一车辆在该第二车辆后方行驶,该第一车辆与该第二车辆的行驶速度均为100km/h,该第一车辆与该第二车辆之间的车距为10m,安全车距为100m。该第一车辆需要10秒(s)调整跟车状态,从而保证与该第二车辆之间的距离等同于该安全车距。第三车辆与第四车辆行驶于同一车道内,该第三车辆在该第四车辆后方行驶,该第三车辆与该第四车辆的行驶速度均为100km/h,该第三车辆与该第四车辆之间的车距为90m,安全车距为100m。该第三车辆仅需要3秒(s)调整跟车状态,从而保证与该第四车辆之间的距离等同于该安全车距。
并且,通常情况下,当车辆与前方车辆速度差距较小,车距与安全车距相等时,在较短时间内即可调整跟车状态,保证车距与安全距离相同,且车辆与前方车辆的速度相同。而如果车辆与前方车辆速度差距较大,车距与安全车距相等时,则需要较长时间调整跟车状态,保证车距与安全距离相同,且车辆与前方车辆的速度相同。
例如,第五车辆与第六车辆行驶于同一车道内,该第五车辆在该第六车辆后方行驶,该第五车辆的行驶速度为120km/h,该第六车辆的行驶速度为80km/h,该第五车辆与该第六车辆之间的车距为100m,安全车距为100m。该第五车辆需要10秒(s)调整跟车状态,从而保证与该第六车辆的速度相同,且与该第六车辆之间的距离等同于该安全车距。第七车辆与第八车辆行驶于同一车道内,该第七车辆在该第八车辆后方行驶,该第七车辆的速度为81km/h,该第八车辆的行驶速度为80km/h,该第七车辆与该第八车辆之间的车距为100m,安全车距为100m。该第七车辆仅需要3秒(s)即可调整跟车状态,从而保证与该第八车辆的速度相同,且与该第八车辆之间的距离等同于该安全车距。
于是,在本申请的一个或多个实施例中,为了更准确的确定调整跟车状态的预测时间,提升用户体验,减小安全隐患,可获取第一行驶速度、第二行驶速度等数据, 从而确定调整跟车状态的预测时间。
具体地,该车辆控制中心可获取该第一车辆的第一行驶速度、该第二车辆的第二行驶速度、该第一车辆与该第二车辆之间的车距以及期望跟车距离。其中,该车辆控制中心配置于该第一车辆上,且该第一车辆与该第二车辆行驶于同一车道内,该第一车辆行驶于该第二车辆后方。
需要说明的是,该第一车辆的第一行驶速度,可由配置于该第一车辆的速度传感器获取,该第二车辆的第二行驶速度、该第一车辆与该第二车辆之间的车距,可由配置与该第一车辆的雷达、图像传感器等设备获取,具体由何种设备获取该第一行驶速度、该第二行驶速度、该第一车辆与该第二车辆之间的车距,本申请不做限制,可根据需要设置。并且,该期望跟车距离可以是预先设置的,例如,预先设置该期望跟车距离为50m、80m、100m等。也可以将该第二行驶速度对应的安全车距,作为该期望跟车距离。例如,该第二行驶速度为100km/h,对应的安全车距为100m,则该期望跟车距离为100m。或者,该第二行驶速度为20km/h,对应的安全车距为30m,则该期望跟车距离为30m。具体如何确定该期望跟车距离,本申请不做限制,可根据需要设置。
采用上述方式,该车辆控制中心可获取第一行驶速度、第二行驶速度等数据,以便根据该第一行驶速度、该第二行驶速度等数据,确定调整跟车状态的预测时间,提高安全性,提升用户体验。
S102:根据第一行驶速度以及第二行驶速度,确定目标速度参数。
通常情况下,该第一车辆的第一行驶速度与该第二车辆的第二行驶速度相差越大,调整跟车状态所需时间越长。继续沿用上例,第五车辆与第六车辆行驶于同一车道内,该第五车辆在该第六车辆后方行驶,该第五车辆的行驶速度为120km/h,该第六车辆的行驶速度为80km/h,该第五车辆与该第六车辆之间的车距为100m,安全车距为100m。该第五车辆需要10秒(s)调整跟车状态,从而保证与该第六车辆的速度相同,且与该第六车辆之间的距离等同于该安全车距。第七车辆与第八车辆行驶于同一车道内,该第七车辆在该第八车辆后方行驶,该第七车辆的速度为81km/h,该第八车辆的行驶速度为80km/h,该第七车辆与该第八车辆之间的车距为100m,安全车距为100m。该第七车辆仅需要3秒(s)即可调整跟车状态,从而保证与该第八车辆的速度相同,且与该第八车辆之间的距离等同于该安全车距。
于是,该车辆控制中心可确定目标速度参数,目标速度参数用于表征该第一行驶 速度与该第二行驶速度差距。
具体地,在本申请的一个或多个实施例中,该车辆控制中心可根据该第一行驶速度以及该第二行驶速度,确定目标速度参数。其中,在确定该目标速度参数时,该车辆控制中心可确定该第一行驶速度与该第二行驶速度的差值,作为相对速度。再计算该相对速度与该第一行驶速度的比值,得到该目标速度参数。或者,该车辆控制中心可确定该第一行驶速度与该第二行驶速度的差值,作为相对速度。再计算该相对速度与该第二行驶速度的比值,得到该目标速度参数。具体如何确定该目标速度参数,可根据需要设置,本申请在此不做限制。
采用上述方式,该车辆控制中心可确定表征该第一行驶速度与该第二行驶速度差距的目标速度参数,以便通过该目标速度参数,确定调整跟车状态的预测时间,提高安全性,提升用户体验。
S103:根据期望跟车距离以及车距,确定目标距离参数。
通常情况下,该第一车辆与该第二车辆之间的车距,与该期望跟车距离差距越大,调整跟车状态所需时间越长。继续沿用上例,第一车辆与第二车辆行驶于同一车道内,该第一车辆在该第二车辆后方行驶,该第一车辆与该第二车辆的行驶速度均为100km/h,该第一车辆与该第二车辆之间的车距为10m,安全车距为100m。该第一车辆需要10秒(s)调整跟车状态,从而保证与该第二车辆之间的距离等同于该安全车距。第三车辆与第四车辆行驶于同一车道内,该第三车辆在该第四车辆后方行驶,该第三车辆与该第四车辆的行驶速度均为100km/h,该第三车辆与该第四车辆之间的车距为90m,安全车距为100m。该第三车辆仅需要3秒(s)调整跟车状态,从而保证与该第四车辆之间的距离等同于该安全车距。。
于是,该车辆控制中心可确定目标距离参数,目标距离参数用于表征该车距与该期望跟车距离差距。
具体地,在本申请的一个或多个实施例中,该车辆控制中心可根据该车距以及该期望跟车距离,确定目标距离参数。其中,在确定该目标距离参数时,该车辆控制中心可确定该车距与该期望跟车距离的差值,作为相对距离。再计算该相对距离与该车距的比值,得到该目标距离参数。或者,该车辆控制中心可确定该车距与该期望跟车距离的差值,作为相对距离。再计算该相对距离与该期望跟车距离的比值,得到该目标距离参数。具体如何确定该目标距离参数,可根据需要设置,本申请在此不做限制。
采用上述方式,该车辆控制中心可确定表征该车距与该期望跟车距离差距的目标距离参数,以便通过该目标距离参数,确定调整跟车状态的预测时间,提高安全性,提升用户体验。
S104:根据目标速度参数以及目标距离参数,确定预测时间。
在本申请的一个或多个实施例中,确定该目标速度参数以及该目标距离参数后,即可确定调整跟车状态的预测时间。
具体地,在本申请的一个或多个实施例中,该车辆控制中心可计算该目标速度参数的平方,得到速度平方参数。并计算该目标距离参数的平方,得到距离平方参数。再计算该速度平方参数与该距离平方参数的和,得到平方参数。最后,计算该平方参数的算术平方根,得到预测时间,单位s。
上述计算过程,可采用以下公式表示:
其中,t为预测时间,A为该目标速度参数,B为该目标距离参数。
采用上述方式,该车辆控制中心可根据该目标速度参数以及该目标距离参数,确定该跟车状态调整的预测时间,以便该车辆控制中心在该预测时间内控制该车辆行驶以完成跟车状态的调整,兼顾安全性与舒适性,从而提高安全性,提升用户体验。
以上为本申请实施例提供的调整跟车状态的预测时间确定方法的具体实现方式。可见,在本申请实施例中,预测时间根据目标速度参数以及目标距离参数确定,而目标速度参数是根据第一车辆的第一行驶速度以及第一车辆跟随的第二车辆的第二行驶速度确定,目标距离参数根据期望跟车距离以两车的车距确定,所以,预测时间是根据两车的车速,期望跟车距离和实际车距确定的,而期望跟车距离与安全相关,而车速和距离是安全性因素,所以,由此得到的预测时间能够兼顾安全性和舒适性。
由于车辆在实际行驶过程中,道路情况瞬息万变,为了及时调整跟车状态,提高安全性,作为本申请的另一种实现方式,本申请还提供了调整跟车状态的预测时间确定的另一种实现方式,具体参见以下实施例。
S201:获取期望跟车距离、第一车辆的第一行驶速度、第二车辆的第二行驶速度以及第一车辆与第二车辆之间的车距,其中,第一车辆以及第二车辆行驶于同一车道,且第一车辆在第二车辆后方行驶。
S202:根据第一行驶速度以及第二行驶速度,确定目标速度参数。
S203:根据期望跟车距离以及车距,确定目标距离参数。
S204:根据目标速度参数以及目标距离参数,确定初始预测时间。
具体地,在本申请的一个或多个实施例中,该车辆控制中心可计算该目标速度参数的平方,得到速度平方参数。并计算该目标距离参数的平方,得到距离平方参数。再计算该速度平方参数与该距离平方参数的和,得到平方参数。最后,计算该平方参数的算术平方根,得到初始预测时间,单位s。
S205:对初始预测时间进行修正,得到预测时间。
具体地,该车辆控制中心可对该初始预测时间进行修正,得到预测时间。
其中,该车辆控制中心可获取预先设置的该第一车辆的最大预测时间以及最小预测时间,该最小预测时间小于该最大预测时间。再计算该最小预测时间与该初始预测时间的和,得到中间预测时间。最后,从该中间预测时间以及该最大预测时间中,确定较小者为预测时间。即,当确定该中间预测时间小于该最大预测时间时,确定该中间预测时间为预测时间。当确定该中间预测时间大于该最大预测时间时,确定该最大预测时间为预测时间。当然,若该中间预测时间等于该最大预测时间,该车辆控制中心可确定该中间预测时间或该最大预测时间为预测时间。
或者,该车辆控制中心可获取预先设置的该第一车辆的最大预测时间以及最小预测时间,该最小预测时间小于该最大预测时间。当确定该初始预测时间小于该最小预测时间时,确定该最小预测时间为该预测时间。当确定该初始预测时间大于该最大预测时间时,确定该最大预测时间为该预测时间。当确定该初始预测时间大于或等于该最小预测时间,且该初始预测时间小于或等于该最大预测时间时,确定该初始预测时间为预测时间。
或者,该车辆控制中心可获取预先设置的该第一车辆的最大预测时间、最小预测时间以及加权参数,该最小预测时间小于该最大预测时间。计算该加权参数与该初始预测时间的乘积,得到加权值。再计算该加权值与该初始预测时间的和,得到中间预测时间。最后,从该中间预测时间以及该最大预测时间中,确定较小者为预测时间。即,当确定该中间预测时间小于该最大预测时间时,确定该中间预测时间为预测时间。当确定该中间预测时间大于该最大预测时间时,确定该最大预测时间为预测时间。当然,若该中间预测时间等于该最大预测时间,该车辆控制中心可确定该中间预测时间或该最大预测时间为预测时间。
当然,该车辆控制中心也可采用其他方式对该初始预测时间进行修正,得到预测时间,具体采用何种方式,本申请不做限制,可根据需要设置。
S201至S203与上述实施例中S101至S103相同,为了简要起见,在此不再详细描述。
采用上述方式,该车辆控制中心可对根据该目标速度参数以及该目标距离参数得到的结果进行修正,从而更准确的确定跟车状态调整的预测时间。
基于调整跟车状态的预测时间,图3示出了本申请一个实施例提供的跟车状态调整方法的流程示意图。如图3所示,本申请实施例提供的跟车状态调整方法包括以下步骤:S111至S113。
S111:获取预测周期、预测时间、第一车辆的第一行驶速度、第二车辆的第二行驶速度、期望跟车距离以及第一车辆与第二车辆之间的车距,其中,第一车辆以及第二车辆在同一车道行驶,且第一车辆在第二车辆后方行驶。
在本申请中,该跟车状态调整方法可由该第一车辆的车辆控制中心执行,也可由与该第一车辆连接的云端服务器等设备执行,具体由何种设备执行,本申请不做限制,可根据需要设置。在本申请的一个或多个实施例中,为了便于说明,以车辆控制中心执行该跟车状态调整方法为例,详细说明。
通常情况下,用于在调整跟车状态时,会在调整跟车状态的初期大幅度加速/减速,从而快速控制车辆与前方车辆之间的车距。于是,在本申请的一个或多个实施例中,该车辆控制中心也可确定最小加速度,实现在调整跟车状态的初期大幅度减速,从而减小倒车的可能性。
具体地,在本申请的一个或多个实施例中,该车辆控制中心可获取预测时间、第一车辆的第一行驶速度、第二车辆的第二行驶速度、期望跟车距离、第一车辆与该第二车辆之间的车距、预先设置的预测周期。其中,该第一车辆与该第二车辆行驶于同一车道内,且该第一车辆在该第二车辆后方行驶。
需要说明的是,该第一车辆的第一行驶速度,可由配置于该第一车辆的速度传感器获取,该第二车辆的第二行驶速度、该第一车辆与该第二车辆之间的车距,可由配置与该第一车辆的雷达、图像传感器等设备获取,具体由何种设备获取该第一行驶速度、该第二行驶速度、该第一车辆与该第二车辆之间的车距,本申请不做限制,可根据需要设置。并且,该期望跟车距离可以是预先设置的,例如,预先设置该期望跟车 距离为50m、80m、100m等。也可以将该第二行驶速度对应的安全车距,作为该期望跟车距离。例如,该第二行驶速度为100km/h,对应的安全车距为100m,则确定该期望跟车距离为100m。或者,该第二行驶速度为20km/h,对应的安全车距为30m,则确定该期望跟车距离为30m。具体如何确定该期望跟车距离,本申请不做限制,可根据需要设置。该预测时间,为调整跟车状态所需时间,例如,该第一车辆的第一行驶速度为80km/h,该第二车辆的第二行驶速度为80km/h,该车距为20m,该期望跟车距离为80m,预计在11s后,使得该第一车辆与该第二车辆之间的车距为80m,且该第一行驶速度为80km/h,则该预测时间为30s。该预测时间可以为预先设置的,也可以是根据该第一行驶速度、第二行驶速度等数据计算得到的,具体如何获取该预测时间,本申请不做限制,可根据需要设置。
采用上述方式,该车辆控制中心可获取第一行驶速度、第二行驶速度等数据,以便根据该第一行驶速度、该第二行驶速度等数据,确定该第一车辆的行驶加速度,从而调整该第一车辆的跟车状态。
S112:根据预测时间、第一行驶速度、第二行驶速度、期望跟车距离以及车距,确定预设时间内的最小加速度。
在本申请的一个或多个实施例中,为了在调整跟车状态的初期减小该第一行驶速度,增大该第一车辆与该第二车辆之间的车距,减小该车辆控制中心控制该第一车辆进行倒车以增大车距的可能性,可计算该第一车辆在该预测时间内调整跟车状态过程中的最小加速度。
具体地,在本申请的一个或多个实施例中,首先,该车辆控制中心可根据该预测时间、该第一行驶速度、该第二行驶速度、该期望跟车距离以及该车距,计算该第一车辆在该预测时间内调整跟车状态过程中的预测加速度曲线。其中,由于现有技术中已存在较为成熟的计算方式计算该预测加速度曲线,为了简要起见,本申请在此不再赘述。
当然,为了更准确的确定该第一车辆的当前状态,从而更准确的计算该预测加速度曲线,该车辆控制中心也可获取该第一车辆的加速度、该第一车辆的加加速度,根据该预测时间、该第一行驶速度、该第一车辆加速度、该第一车辆加加速度、该第二行驶速度、该期望跟车距离以及该车距,计算该第一车辆在该预测时间内调整跟车状态的预测加速度曲线。
其次,该车辆控制中心可将该预测加速度曲线中,该预测时间内的加速度最小值,作为该预测时间内的最小加速度。
采用上述方式,该车辆控制中心可通过计算出的该第一车辆在该预测时间内调整跟车状态过程中的预测加速度曲线,确定该第一车辆在该预测时间内的最小加速度,以便在后续步骤中按照该最小加速度,调整行驶速度,从而调整跟车状态。
S113:在预测周期内,按照最小加速度行驶,调整跟车状态。
在本申请的一个或多个实施例中,该车辆控制中心确定该最小加速度后,便可在该预测周期内,按照该最小加速度,调整行驶速度,从而调整跟车状态。实现在调整跟车状态的初期大幅度减速,增大该第一车辆与该第二车辆之间的车距,减小该车辆控制中心控制该第一车辆进行倒车以增大车距的可能性。
具体地,该车辆控制中心可在该预测周期内,控制该第一车辆按照该最小加速度调整行驶速度,并行驶,从而调整跟车状态。
采用上述方式,该车辆控制中心可实现在调整跟车状态的初期大幅度减速,增大该第一车辆与该第二车辆之间的车距,减小该车辆控制中心控制该第一车辆进行倒车以增大车距的可能性。并且,采用上述方式,在调整跟车状态的初期大幅度减小该第一车辆的第一行驶速度,符合用户在调整跟车状态的操作,提升用户体验。
为了由于该预测周期结束时,可能未完成该跟车状态的调整,于是,作为本申请的另一种实现方式,本申请还提供了跟车状态调整的另一种实现方式,具体参见以下实施例。
请参见图4,本申请提供的跟车状态调整的另一种实现方式包括以下步骤:
S211:获取预测周期、预测时间、第一车辆的第一行驶速度、第二车辆的第二行驶速度、期望跟车距离以及第一车辆与第二车辆之间的车距,其中,第一车辆以及第二车辆在同一车道行驶,且第一车辆在第二车辆后方行驶。
S212:根据预测时间、第一行驶速度、第二行驶速度、期望跟车距离以及车距,确定预设时间内的最小加速度。
S213:在预测周期内,按照最小加速度行驶,调整跟车状态。
S214:获取第一行驶速度、第二行驶速度、期望跟车距离以及车距。
具体地,为了确定该第一车辆是否完成跟车状态的调整,该车辆控制中心可重新获取该第一车辆的第一行驶速度、该第二车辆的第二行驶速度、期望跟车距离、该第 一车辆与该第二车辆之间的车距。
S215:判断第一行驶速度、第二行驶速度、期望跟车距离以及车距是否满足跟车条件,若是,则结束流程,若否,则执行S211。
具体地,该第一车辆的车辆控制中心,可根据重新获取的该第一行驶速度、该第二行驶速度、该期望跟车距离以及该车距,判断是否满足跟车条件。若是,则结束流程,完成该第一车辆的跟车状态的调整。若否,则执行步骤S211。
其中,该跟车条件可以是该第一行驶速度等于该第二行驶速度,且该期望跟车距离等于该车距。也可以是该第一行驶速度与该第二行驶速度的比值处于预设的第一比值区间,该第一比值区间为0.9~1.1,且该车距与该期望跟车距离的比值处于预设的第二比值区间,该第二比值区间为0.95~1.05。还可以是其他跟车条件,即,该跟车条件具体为何种条件,可根据需要设置,本申请在此不做限制。
S211至S213与上述实施例中S111至S113相同,为了简要起见,在此不再详细描述。
采用上述实现方式,该车辆控制中心可在单个预测周期结束后未完成该第一车辆的跟车状态的调整时,重新确定最小加速度,继续根据重新确定的该最小加速度调整该第一车辆的跟车状态。
为了更准确的确定该第一车辆在该预测周期内的最小加速度,提高调整该第一车辆的跟车状态的效率,作为本申请的另一种实现方式,本申请还提供了跟车状态调整的另一种实现方式,具体参见以下实施例。
本申请提供的跟车状态调整的另一种实现方式包括以下步骤:
S301:获取预测周期、预测时间、第一车辆的第一行驶速度、第二车辆的第二行驶速度、期望跟车距离以及第一车辆与第二车辆之间的车距,其中,第一车辆以及第二车辆在同一车道行驶,且第一车辆在第二车辆后方行驶。
S302:根据预测时间、第一行驶速度、第二行驶速度、期望跟车距离以及车距,确定预设时间内的最小加速度。
具体地,在本申请的一个或多个实施例中,首先,该车辆控制中心可获取预先设置的划分参数。
其次,该车辆控制中心可按照该划分参数,将该预测时间划分为若干预测子时间。其中,该车辆控制中心可按照该划分参数,随机将该预测时间划分为若干预测子时间, 每个预测子时间的时长可以与其他预测子时间中至少一个预测子时间的时长相等,也可以与其他预测子时间的时长均不相等。该车辆控制中心也可按照该划分参数,将该预测时间划分为时长相等的若干预测子时间。如何按照该划分参数划分该预测时间,本申请不做限制,可根据需要设置。
再次,该车辆控制中心可根据该预测时间、该第一行驶速度、该第二行驶速度、该期望跟车距离以及该车距,分别计算该若干预测子时间中每个预测子时间对应的子加速度。
其中,该车辆控制中心可根据该预测时间、该第一行驶速度、该第二行驶速度、该期望跟车距离以及该车距,确定该预测时间对应的预测加速度曲线。再针对每个预测子时间,从该预测时间对应的预测加速度曲线中,确定该预测子时间对应的子加速度曲线。将该子加速度曲线的最小值,作为该预测子时间对应的子加速度。
该车辆控制中心也可按照时间从先到后的顺序,从该若干预测子时间中确定第一预测子时间、第二预测子时间、第三预测子时间等。再根据该第一预测子时间、该第一行驶速度、该第二行驶速度、该期望跟车距离以及该车距,确定该第一预测子时间对应的第一加速度曲线,以及该第一预测子时间结束时的跟车数据。同时,确定该第一加速度曲线中加速度最小值,为该第一预测子时间对应的子加速度。该跟车数据包括实时车距、实时第一行驶速度、实时第二行驶速度等。
再根据该跟车距离以及该第二预测子时间,确定该第二预测子时间对应的第二加速度曲线,以及该第二预测子时间结束时的跟车数据。同时,确定该第二加速度曲线中加速度最小值,为该第二预测子时间对应的子加速度。再根据该第二预测子时间结束时的跟车距离以及该第三预测子时间,确定该第三预测子时间对应的第三加速度曲线,以及该第三预测子时间结束时的跟车数据。同时,确定该第三加速度曲线中加速度最小值,为该第三预测子时间对应的子加速度。以此类推,直至确定该若干预测子时间分别对应的子加速度为止。
最后,该车辆控制中心可从确定出的若干子加速度中,确定最小的子加速度,为该预测时间内的最小加速度。
S303:在预测周期内,按照最小加速度行驶,调整跟车状态。
S301与上述实施例中S111相同,S303与上述实施例中S113相同,为了简要起见,在此不再详细描述。
采用上述方式,该车辆控制中心可更准确的确定该第一车辆在该预测周期内的最小加速度,提高调整该第一车辆的跟车状态的效率。
为了进一步减小该第一车辆出现倒车现象的可能性,作为本申请的另一种实现方式,本申请还提供了跟车状态调整的另一种实现方式,具体参见以下实施例。
本申请提供的跟车状态调整的另一种实现方式包括以下步骤:
S401:获取预测周期、预测时间、第一车辆的第一行驶速度、第二车辆的第二行驶速度、期望跟车距离以及第一车辆与第二车辆之间的车距,其中,第一车辆以及第二车辆在同一车道行驶,且第一车辆在第二车辆后方行驶。
S402:根据预测时间、第一行驶速度、第二行驶速度、期望跟车距离以及车距,确定预设时间内的最小加速度。
具体地,在本申请的一个或多个实施例中,首先,该车辆控制中心可根据该预测时间、该第一行驶速度、该第二行驶速度、该期望跟车距离以及该车距,计算该第一车辆在该预测时间内调整跟车状态过程中的预测加速度曲线以及预测速度曲线。
当确定该预测速度曲线中存在速度小于0的若干坐标点时,确定该预测速度曲线职工速度等于0的坐标点对应的坐标时刻,根据该坐标时刻,重新确定预测时间,并确定第二行驶速度为0。根据重新确定的该预测时间、该第二行驶速度、该第一行驶速度、该期望跟车距离以及该车距,计算该第一车辆在该预测时间内调整跟车状态过程中的预测加速度曲线。并确定该预测加速度曲线中加速度最小值,为该预测时间内的最小加速度。
当确定该预测速度曲线中不存在速度小于0的坐标点时,确定该预测加速度曲线中加速度最小值,为该预测时间内的最小加速度。
S403:在预测周期内,按照最小加速度行驶,调整跟车状态。
S401与上述实施例中S111相同,S403与上述实施例中S113相同,为了简要起见,在此不再详细描述。
采用上述方式,该车辆控制中心可进一步减小该第一车辆出现倒车现象的可能性。
基于上述实施例提供的调整跟车状态的预测时间确定方法,相应地,本申请还提供了调整跟车状态的预测时间确定装置的具体实现方式。请参见以下实施例。
首先参见图5,本申请实施例提供的调整跟车状态的预测时间确定装置500包括以下单元:
获取单元501,用于获取期望跟车距离、第一车辆的第一行驶速度、第二车辆的第二行驶速度以及第一车辆与第二车辆之间的车距,其中,第一车辆以及第二车辆行驶于同一车道,且第一车辆在第二车辆后方行驶;
第一确定单元502,用于根据第一行驶速度以及第二行驶速度,确定目标速度参数;
第二确定单元503,用于根据期望跟车距离以及车距,确定目标距离参数;
预测时间单元504,用于根据目标速度参数以及目标距离参数,确定预测时间。
上述装置500可见,通过获取单元501获取第一车辆行驶速度、第二车辆行驶速度等参数,再由第一确定单元确定表征该第一行驶速度与该第二行驶速度差距的目标速度参数,且由第二确定单元确定表征车距与该期望跟车距离差距的目标距离参数。最后,由预测时间单元根据该目标速度参数以及该目标距离参数,确定跟车状态调整时间。
作为本申请的一种实现方式,为了更准确的确定该目标速度参数,上述装置还可以包括:第一确定子单元。
该第一确定子单元,用于根据第一行驶速度以及第二行驶速度,确定相对速度,计算相对速度与第一行驶速度的比值,得到目标速度参数。
作为本申请的另一种实现方式,为了更准确的确定该目标速度参数,上述装置还可以包括:第二确定子单元。
该第二确定子单元,用于根据期望跟车距离以及车距,确定相对距离,计算车距与期望跟车距离的比值,得到目标距离参数。
作为本申请的另一种实现方式,为了更准确的确定该目标速度参数,上述装置还可以包括:预测时间子单元。
该预测时间子单元,用于根据目标速度参数以及目标距离参数,确定初始预测时间,对初始预测时间进行修正,得到预测时间。
作为本申请的另一种实现方式,为了更准确的确定该目标速度参数,上述装置还可以包括:预测时间子单元。
该预测时间子单元,用于获取第一车辆的最大预测时间以及最小预测时间,根据最小预测时间以及初始预测时间,确定中间预测时间,将中间预测时间与最大预测时间中的较小者确定为预测时间。
作为本申请的另一种实现方式,为了更准确的确定该目标速度参数,上述装置还 可以包括:预测时间子单元。
该预测时间子单元,用于获取预设的加权参数,确定最小预测时间与加权参数的乘积,作为加权值,将加权值与初始预测时间的和,作为中间预测时间。
作为本申请的另一种实现方式,调整跟车状态的预测时间确定装置还包括:行驶单元。
获取单元,还用于获取预测周期、预测时间、第一车辆的第一行驶速度、第二车辆的第二行驶速度、期望跟车距离以及第一车辆与第二车辆之间的车距,其中,第一车辆以及第二车辆在同一车道行驶,且第一车辆在第二车辆后方行驶。
第三确定单元,用于根据预测时间、第一行驶速度、第二行驶速度、期望跟车距离以及车距,确定预设时间内的最小加速度。
行驶单元,用于在预测周期内,按照最小加速度行驶,调整跟车状态。
根据本申请提供的实施例可见,行驶单元能够控制第一车辆按照最小加速度行驶。而该最小加速度是由获取单元以及第三确定单元根据车距、期望跟车距离等数据确定出的该预测时间内的最小加速度。按照该最小加速度行驶可实现大幅度减小该第一行驶速度,从而增大该车距,减小倒车的可能性,并且,在调整跟车状态初期大幅度减小该第一行驶速度,符合大部分用户的驾驶习惯,因此采用上述方式,也可提升用户体验。
作为本申请的一种实现方式,为了完成该第一车辆的跟车状态的调整,上述行驶单元可以具体包括:行驶子单元。
行驶子单元,用于获取第一行驶速度、第二行驶速度、期望跟车距离以及车距,当根据第一行驶速度、第二行驶速度、期望跟车距离以及车距,确定不满足跟车条件时,返回执行获取预测周期、预测时间、第一车辆的第一行驶速度、第二车辆的第二行驶速度、期望跟车距离以及第一车辆与第二车辆之间的车距的步骤。
作为本申请的一种实现方式,为了完成该第一车辆的跟车状态的调整,上述行驶单元可以具体包括:行驶子单元。
行驶子单元,用于第一行驶速度与第二行驶速度相等,且期望跟车距离与车距相等。
作为本申请的一种实现方式,为了更准确的确定该最小加速度,上述第三确定单元可以具体包括:第三确定子单元。
第三确定子单元,用于将预测时间划分为若干预测子时间,根据预测时间、第一行驶速度、第二行驶速度、期望跟车距离以及车距,分别确定若干预测子时间对应的子加速度,将若干子加速度中确定最小的子加速度,作为预测时间内的最小加速度。
作为本申请的一种实现方式,为了更准确的确定该最小加速度,上述第三确定单元可以具体包括:第三确定子单元。
第三确定子单元,用于若干预测子时间的时长均相等。
作为本申请的一种实现方式,为了更准确的确定该最小加速度,上述第三确定单元可以具体包括:第三确定子单元。
第三确定子单元,用于根据预测时间、第一行驶速度、第二行驶速度、期望跟车距离以及车距,确定预测时间对应的预测加速度曲线,针对每个预测子时间,确定预测加速度曲线中对应该预测子时间的子加速度曲线,确定子加速度曲线的最小值,为该预测子时间对应的子加速度。
图6示出了本申请实施例提供的调整跟车状态的预测时间确定设备的硬件结构示意图。
该调整跟车状态的预测时间确定设备600可以包括处理器601以及存储有计算机程序指令的存储器602。
具体地,上述处理器601可以包括中央处理器(CPU),或者特定集成电路(Application Specific Integrated Circuit,ASIC),或者可以被配置成实施本申请实施例的一个或多个集成电路。
存储器602可以包括用于数据或指令的大容量存储器。举例来说而非限制,存储器602可包括硬盘驱动器(Hard Disk Drive,HDD)、软盘驱动器、闪存、光盘、磁光盘、磁带或通用串行总线(Universal Serial Bus,USB)驱动器或者两个或更多个以上这些的组合。在合适的情况下,存储器602可包括可移除或不可移除(或固定)的介质。在合适的情况下,存储器602可在综合网关容灾设备的内部或外部。在特定实施例中,存储器602是非易失性固态存储器。
在特定实施例中,存储器可包括只读存储器(ROM),随机存取存储器(RAM),磁盘存储介质设备,光存储介质设备,闪存设备,电气、光学或其他物理/有形的存储器存储设备。因此,通常,存储器包括一个或多个编码有包括计算机可执行指令的软件的有形(非暂态)计算机可读存储介质(例如,存储器设备),并且当该软件被执 行(例如,由一个或多个处理器)时,其可操作来执行参考根据本公开的一方面的方法所描述的操作。
处理器601通过读取并执行存储器602中存储的计算机程序指令,以实现上述实施例中的任意一种调整跟车状态的预测时间确定方法。
在一个示例中,调整跟车状态的预测时间确定设备还可包括通信接口603和总线610。其中,如图6所示,处理器601、存储器602、通信接口603通过总线610连接并完成相互间的通信。
通信接口603,主要用于实现本申请实施例中各模块、装置、单元和/或设备之间的通信。
总线610包括硬件、软件或两者,将调整跟车状态的预测时间确定设备的部件彼此耦接在一起。举例来说而非限制,总线可包括加速图形端口(AGP)或其他图形总线、增强工业标准架构(EISA)总线、前端总线(FSB)、超传输(HT)互连、工业标准架构(ISA)总线、无限带宽互连、低引脚数(LPC)总线、存储器总线、微信道架构(MCA)总线、外围组件互连(PCI)总线、PCI-Express(PCI-X)总线、串行高级技术附件(SATA)总线、视频电子标准协会局部(VLB)总线或其他合适的总线或者两个或更多个以上这些的组合。在合适的情况下,总线610可包括一个或多个总线。尽管本申请实施例描述和示出了特定的总线,但本申请考虑任何合适的总线或互连。
该调整跟车状态的预测时间确定设备可以执行本申请实施例中的调整跟车状态的预测时间确定方法,从而实现本申请实施例提供的调整跟车状态的预测时间确定方法或者本申请实施例提供的跟车状态调整方法的相应技术效果。
另外,结合上述实施例中的调整跟车状态的预测时间确定方法和跟车状态调整方法,本申请实施例可提供一种计算机存储介质来实现。该计算机存储介质上存储有计算机程序指令;该计算机程序指令被处理器执行时实现上述实施例中的任意一种调整跟车状态的预测时间确定方法或者本申请实施例提供的跟车状态调整方法。
需要明确的是,本申请并不局限于上文所描述并在图中示出的特定配置和处理。为了简明起见,这里省略了对已知方法的详细描述。在上述实施例中,描述和示出了若干具体的步骤作为示例。但是,本申请的方法过程并不限于所描述和示出的具体步骤,本领域的技术人员可以在领会本申请的精神后,作出各种改变、修改和添加,或者改变步骤之间的顺序。
以上所述的结构框图中所示的功能块可以实现为硬件、软件、固件或者它们的组合。当以硬件方式实现时,其可以例如是电子电路、专用集成电路(ASIC)、适当的固件、插件、功能卡等等。当以软件方式实现时,本申请的元素是被用于执行所需任务的程序或者代码段。程序或者代码段可以存储在机器可读介质中,或者通过载波中携带的数据信号在传输介质或者通信链路上传送。“机器可读介质”可以包括能够存储或传输信息的任何介质。机器可读介质的例子包括电子电路、半导体存储器设备、ROM、闪存、可擦除ROM(EROM)、软盘、CD-ROM、光盘、硬盘、光纤介质、射频(RF)链路,等等。代码段可以经由诸如因特网、内联网等的计算机网络被下载。
还需要说明的是,本申请中提及的示例性实施例,基于一系列的步骤或者装置描述一些方法或系统。但是,本申请不局限于上述步骤的顺序,也就是说,可以按照实施例中提及的顺序执行步骤,也可以不同于实施例中的顺序,或者若干步骤同时执行。
上面参考根据本公开的实施例的方法、装置和计算机程序产品的流程图和/或框图描述了本公开的各方面。应当理解,流程图和/或框图中的每个方框以及流程图和/或框图中各方框的组合可以由计算机程序指令实现。这些计算机程序指令可被提供给通用计算机、专用计算机、或其它可编程数据处理装置的处理器,以产生一种机器,使得经由计算机或其它可编程数据处理装置的处理器执行的这些指令使能对流程图和/或框图的一个或多个方框中指定的功能/动作的实现。这种处理器可以是但不限于是通用处理器、专用处理器、特殊应用处理器或者现场可编程逻辑电路。还可理解,框图和/或流程图中的每个方框以及框图和/或流程图中的方框的组合,也可以由执行指定的功能或动作的专用硬件来实现,或可由专用硬件和计算机指令的组合来实现。
以上所述,仅为本申请的具体实施方式,所属领域的技术人员可以清楚地了解到,为了描述的方便和简洁,上述描述的系统、模块和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。应理解,本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到各种等效的修改或替换,这些修改或替换都应涵盖在本申请的保护范围之内。

Claims (17)

  1. 一种调整跟车状态的预测时间确定方法,应用于第一车辆,包括:
    获取期望跟车距离、所述第一车辆的第一行驶速度、第二车辆的第二行驶速度以及所述第一车辆与所述第二车辆之间的车距,其中,所述第一车辆以及所述第二车辆行驶于同一车道,且所述第一车辆在所述第二车辆后方行驶;
    根据所述第一行驶速度以及所述第二行驶速度,确定目标速度参数;
    根据所述期望跟车距离以及所述车距,确定目标距离参数;
    根据所述目标速度参数以及所述目标距离参数,确定预测时间。
  2. 根据权利要求1所述的方法,其中,根据所述第一行驶速度以及所述第二行驶速度,确定目标速度参数,具体包括:
    根据所述第一行驶速度以及所述第二行驶速度,确定相对速度;
    计算所述相对速度与所述第一行驶速度的比值,得到目标速度参数。
  3. 根据权利要求1所述的方法,其中,根据所述期望跟车距离以及所述车距,确定目标距离参数,具体包括:
    根据所述期望跟车距离以及所述车距,确定相对距离;
    计算所述车距与所述期望跟车距离的比值,得到目标距离参数。
  4. 根据权利要求1所述的方法,其中,根据所述目标速度参数以及所述目标距离参数,确定预测时间,具体包括:
    根据所述目标速度参数以及所述目标距离参数,确定初始预测时间;
    对所述初始预测时间进行修正,得到预测时间。
  5. 根据权利要求4所述的方法,其中,对所述初始预测时间进行修正,得到预测时间,具体包括:
    获取第一车辆的最大预测时间以及最小预测时间;
    根据所述最小预测时间以及所述初始预测时间,确定中间预测时间;
    将所述中间预测时间与所述最大预测时间中的较小者确定为预测时间。
  6. 根据权利要求5所述的方法,其中,根据所述最小预测时间以及所述初始预测时间,确定中间预测时间,具体包括:
    获取预设的加权参数;
    确定所述最小预测时间与所述加权参数的乘积,作为加权值;
    将所述加权值与所述初始预测时间的和,作为中间预测时间。
  7. 根据权利要求1所述的方法,其中,在根据所述目标速度参数以及所述目标距离参数,确定预测时间之后,所述方法还包括:
    获取预测周期、预测时间、所述第一车辆的第一行驶速度、第二车辆的第二行驶速度、期望跟车距离以及所述第一车辆与所述第二车辆之间的车距;
    根据所述预测时间、所述第一行驶速度、所述第二行驶速度、所述期望跟车距离以及所述车距,确定所述预测时间内的最小加速度;
    在所述预测周期内,按照所述最小加速度行驶,调整跟车状态。
  8. 根据权利要求7所述的方法,其中,所述调整跟车状态之后,所述方法还包括:
    获取第一行驶速度、第二行驶速度、期望跟车距离以及车距;
    当根据所述第一行驶速度、所述第二行驶速度、所述期望跟车距离以及所述车距,确定不满足跟车条件时,返回执行所述获取预测周期、预测时间、所述第一车辆的第一行驶速度、第二车辆的第二行驶速度、期望跟车距离以及所述第一车辆与所述第二车辆之间的车距的步骤。
  9. 根据权利要求8所述的方法,其中,所述跟车条件包括:
    所述第一行驶速度与所述第二行驶速度相等,且所述期望跟车距离与所述车距相等。
  10. 根据权利要求7所述的方法,其中,根据所述预测时间、所述第一行驶速度、所述第二行驶速度、所述期望跟车距离以及所述车距,确定所述预测时间内的最小加速度,具体包括:
    将所述预测时间划分为若干预测子时间;
    根据所述预测时间、所述第一行驶速度、所述第二行驶速度、所述期望跟车距离以及所述车距,分别确定所述若干预测子时间对应的子加速度;
    将所述若干子加速度中确定最小的子加速度,作为所述预测时间内的最小加速度。
  11. 根据权利要求10所述的方法,其中,所述若干预测子时间的时长均相等。
  12. 根据权利要求10所述的方法,其中,根据所述预测时间、所述第一行驶速度、所述第二行驶速度、所述期望跟车距离以及所述车距,分别确定所述若干预测子时间对应的子加速度,具体包括:
    根据所述预测时间、所述第一行驶速度、所述第二行驶速度、所述期望跟车距离 以及所述车距,确定所述预测时间对应的预测加速度曲线;
    针对每个预测子时间,确定所述预测加速度曲线中对应该预测子时间的子加速度曲线;
    确定所述子加速度曲线的最小值,为该预测子时间对应的子加速度。
  13. 一种调整跟车状态的预测时间确定装置,应用于第一车辆,所述装置包括:
    获取单元,用于获取期望跟车距离、所述第一车辆的第一行驶速度、第二车辆的第二行驶速度以及所述第一车辆与所述第二车辆之间的车距,其中,所述第一车辆以及所述第二车辆行驶于同一车道,且所述第一车辆在所述第二车辆后方行驶;
    第一确定单元,用于根据所述第一行驶速度以及所述第二行驶速度,确定目标速度参数;
    第二确定单元,用于根据所述期望跟车距离以及所述车距,确定目标距离参数;
    预测时间单元,用于根据所述目标速度参数以及所述目标距离参数,确定预测时间。
  14. 一种调整跟车状态的预测时间确定设备,所述设备包括:
    处理器以及存储有计算机程序指令的存储器;
    所述处理器执行所述计算机程序指令时实现如权利要求1-12任意一项所述的调整跟车状态的预测时间确定方法。
  15. 一种计算机可读存储介质,所述计算机可读存储介质上存储有计算机程序指令,所述计算机程序指令被处理器执行时实现如权利要求1-12任意一项所述的调整跟车状态的预测时间确定方法。
  16. 一种计算机程序产品,所述计算机程序产品中的指令由电子设备的处理器执行时,使得所述电子设备执行如权利要求1-12任意一项所述的调整跟车状态的预测时间确定方法。
  17. 一种车辆,包括如权利要求13所述的调整跟车状态的预测时间确定装置,或者如权利要求14所述的调整跟车状态的预测时间确定设备,或者如权利要求15所述的计算机可读存储介质,或者如权利要求16所述的计算机程序产品。
PCT/CN2023/090403 2022-10-18 2023-04-24 调整跟车状态的预测时间确定方法、装置及设备 WO2024082590A1 (zh)

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