CN116486619A - Highway lane-level vehicle distance confirmation system and method - Google Patents

Abstract

The invention provides a lane-level vehicle distance confirmation system and a lane-level vehicle distance confirmation method for a highway, which relate to the technical field of traffic safety and comprise the following steps: the system comprises a control terminal, a vehicle measurement structure and a vehicle distance indication structure; the vehicle measuring structure is arranged on each single lane of the expressway, a plurality of vehicle measuring structures are arranged in each single lane, and the vehicle measuring structures are used for sending axle load signals of the vehicles to the control terminal when the vehicles are detected to pass through the single lane; the control terminal is used for determining a target safety vehicle distance corresponding to the vehicle according to the axle load signal and the current environment data of the vehicle, and controlling a vehicle distance indicating structure deployed on a single lane according to the target safety vehicle distance to prompt the vehicle. The invention can dynamically recommend the safe vehicle distance with higher safety, and can assist the driver to confirm the safe vehicle distance through the vehicle distance indicating structure distributed on each single lane, thereby realizing effective, clear and differentiated vehicle distance prompt for the single lane.

Description

Highway lane-level vehicle distance confirmation system and method

Technical Field

The invention relates to the technical field of traffic safety, in particular to a lane-level vehicle distance confirmation system and method for a highway.

Background

According to statistics, the number of rear-end collision accidents on the expressway is high, wherein the accident is caused by the fact that the safety distance is not kept to be outstanding, and the accident is one of main reasons. At present, reminding and confirmation are usually carried out through a road side indication board, a warning horn and the like, and an effective, clear and differentiated vehicle distance confirmation method for a single lane is lacked; in addition, the existing vehicle distance confirmation method generally only considers the vehicle speed in the process of confirming the safety vehicle distance, so that the safety of the confirmed safety vehicle distance needs to be improved.

Disclosure of Invention

Therefore, the present invention aims to provide a lane-level vehicle distance confirmation system and method for expressways, which can dynamically recommend a safe vehicle distance with higher safety, and assist drivers to confirm the safe vehicle distance through a vehicle distance indication structure arranged on each single lane, so as to realize effective, clear and differentiated vehicle distance prompt for the single lane.

In a first aspect, an embodiment of the present invention provides a lane-level distance confirmation system for an expressway, including: the control terminal is respectively in communication connection with the vehicle measuring structure and the vehicle distance indicating structure; wherein,,

The vehicle measurement structures are deployed on each single lane of the expressway, a plurality of vehicle measurement structures are deployed in each single lane, and the vehicle measurement structures are used for sending axle load signals of vehicles to the control terminal when the vehicles are detected to pass through the single lane;

the control terminal is used for determining a target safety distance corresponding to the vehicle according to the axle load signal and the current environment data of the vehicle, and controlling the distance indication structure deployed on the single lane according to the target safety distance to prompt the vehicle.

In one embodiment, the vehicle measurement structure comprises a sensor array and a wireless transmission module, wherein the wireless transmission module is respectively in communication connection with the sensor array and the control terminal;

wherein,,

the sensor array is used for detecting axle load signals of vehicles passing through the single lane;

the wireless transmission module is used for sending the axle load signal to the control terminal.

In one embodiment, the sensor array includes at least one piezoelectric sensor, and/or at least one geomagnetic sensor.

In one embodiment, the distance indicating structure comprises a first distance indicating structure and a second distance indicating structure, which are disposed on both sides of the single lane, respectively.

In one embodiment, a measurement area and a vehicle distance confirmation area are marked in the single lane, the vehicle distance confirmation area is positioned at the downstream of the measurement area, a vehicle distance confirmation starting point marking is marked at the starting point of the vehicle distance confirmation area, the vehicle measurement structure is deployed in the measurement area on each single lane of the expressway, the vehicle distance indication structure comprises a plurality of LED indicator lamps, and each LED indicator lamp is sequentially deployed at the downstream of the measurement area according to a specified interval;

the LED indicator lamp is used for receiving the LED control signal sent by the control terminal and sending out prompt lights with different colors according to the LED control signal;

and if the distance between the LED indicator lamp and the vehicle distance confirmation starting point marking is greater than the target safety vehicle distance, the LED indicator lamp emits prompting light of a second color.

In a second aspect, an embodiment of the present invention further provides a method for confirming a lane-level vehicle distance of an expressway, where the method is applied to the control terminal in the lane-level vehicle distance confirmation system of an expressway provided in any one of the first aspects, and the method includes:

Receiving axle load signals of vehicles sent by each vehicle measuring structure in a single lane;

determining a target safety distance corresponding to the vehicle according to the axle load signal and the current environment data of the vehicle;

and controlling a vehicle distance indicating structure arranged on the single lane to prompt the vehicle distance according to the target safety vehicle distance.

In one embodiment, determining a target safe distance corresponding to the vehicle according to the axle load signal and current environmental data of the vehicle includes:

determining vehicle weight data of the vehicle according to the axle load signal; determining the speed data of the vehicle according to the time information carried by the axle load signal sent by the current vehicle measurement structure, the time information carried by the axle load signal sent by the next vehicle measurement structure and the distance between the current vehicle measurement structure and the next vehicle measurement structure;

determining an initial safety vehicle distance corresponding to the vehicle according to the vehicle weight data and the vehicle speed data;

and adjusting the initial safety distance according to the current environment data to determine the target safety distance corresponding to the vehicle.

In one embodiment, according to the target safe distance, controlling a distance indication structure disposed on the single lane to prompt the distance of the vehicle comprises:

Determining a first LED indicator light with a distance smaller than the target safety distance from an LED indicator light included in a vehicle distance indicating structure, and sending a first LED control signal to the first LED indicator light so that the first LED indicator light sends out prompt light with a first color;

and determining a second LED indicator light with the distance between the second LED indicator light and the vehicle distance confirmation starting point marking larger than the target safety vehicle distance from the LED indicator lights included in the vehicle distance indication structure, and sending a second LED control signal to the second LED indicator light so that the second LED indicator light sends out prompt light with a second color.

In a third aspect, an embodiment of the present invention further provides a control terminal, including a processor and a memory, the memory storing computer executable instructions executable by the processor, the processor executing the computer executable instructions to implement the method according to any one of the first aspects.

In a fourth aspect, embodiments of the present invention also provide a computer-readable storage medium storing computer-executable instructions which, when invoked and executed by a processor, cause the processor to implement the method of any one of the first aspects.

The system and the method for confirming the lane-level vehicle distance of the expressway provided by the embodiment of the invention comprise the following steps: the control terminal is respectively in communication connection with the vehicle measuring structure and the vehicle distance indicating structure; the vehicle measuring structure is arranged on each single lane of the expressway, a plurality of vehicle measuring structures are arranged in each single lane, and the vehicle measuring structures are used for sending axle load signals of the vehicles to the control terminal when the vehicles are detected to pass through the single lane; the control terminal is used for determining a target safety vehicle distance corresponding to the vehicle according to the axle load signal and the current environment data of the vehicle, and controlling a vehicle distance indicating structure deployed on a single lane according to the target safety vehicle distance to prompt the vehicle. According to the lane-level vehicle distance confirmation system of the expressway, the vehicle measurement structure and the vehicle distance indication structure are arranged on each single lane of the expressway, for each single lane, the axle load signal of a vehicle passing through the single lane is detected through the vehicle measurement structure, so that the target safe vehicle distance is comprehensively determined through the control terminal in combination with the axle load signal and the current environment data.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a lane-level vehicle distance confirmation system for expressways according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a vehicle measurement structure according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of a control terminal according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of another lane-level vehicle distance confirmation system for expressways according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of another lane-level vehicle distance confirmation system for expressways according to an embodiment of the present invention;

fig. 6 is a schematic flow chart of a method for confirming a lane-level vehicle distance of an expressway according to an embodiment of the invention;

fig. 7 is a flow chart of another method for determining lane-level distance of expressway according to an embodiment of the invention;

fig. 8 is a schematic structural diagram of a control terminal according to an embodiment of the present invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Currently, provision is made according to the relevant regulations: when the motor vehicle runs on the expressway, the distance between the motor vehicle and the front vehicle of the same lane is kept to be more than 100 meters when the speed exceeds 100 kilometers per hour, and when the speed is lower than 100 kilometers per hour, the distance between the motor vehicle and the front vehicle of the same lane can be properly shortened, but the minimum distance is not less than 50 meters. When driving at night and meeting low visibility meteorological conditions such as fog, rain, snow, sand dust, hail and the like, the safety vehicle distance should be properly increased. In addition to this, the total mass of the vehicle has a great influence on the safety distance, as is the case with trucks and cars of similar speed, the braking distance required for the truck being significantly longer. However, the conventional highway vehicle distance confirmation sign and vehicle distance confirmation starting point marking system cannot provide corresponding safety vehicle distance confirmation information according to different weather conditions, vehicle speeds, total vehicle mass and other factors, and the conventional vehicle distance confirmation sign does not distinguish lanes and is easy to misunderstand and confuse a driver. In addition, because the speed of the vehicle is fast and the expressway lacks obvious reference objects, the safety vehicle distance cannot be clearly and effectively confirmed by only confirming the starting mark (some of which are worn) by the vehicle distance on the ground. Internationally used vehicle distance confirmation methods are "two second law" or "three second law", i.e. a time distance of two or three seconds is to be kept from the preceding vehicle.

In addition, in addition to the conventional road side vehicle distance confirmation sign, the existing vehicle distance confirmation scheme includes: an intelligent indicating system and an indicating method thereof (CN 113034973A) for highway safety distance, a dynamic warning device and a warning method thereof (CN 113034974A) for highway safety distance, a vehicle speed distance early warning system and a vehicle speed distance early warning method based on microwave radar and video images (CN 112216111A), a road distance confirmation warning system (CN 111477031A), a safety speed and distance warning system (CN 105719480A) for highways and a vehicle distance confirmation and road congestion query system (CN 110853352A) based on 5G communication technology. The existing scheme has the following main objective defects:

(1) The existing scheme does not consider the difference of safe vehicle distances caused by different vehicle weights;

(2) The existing scheme reminds and confirms through a road side indication board, a warning horn and the like, and lacks an effective, clear and differentiated vehicle distance confirmation method for a single lane;

(3) The existing scheme is to install a plurality of cameras or radars on one or a plurality of door frames, so that the speed of the passing vehicle is measured, the construction and debugging period is longer, and the cost is higher; the result of the camera scheme is greatly affected by weather.

Based on the above, the embodiment of the invention provides a lane-level vehicle distance confirmation system and a lane-level vehicle distance confirmation method for a highway, which can dynamically recommend a safe vehicle distance with higher safety, and can assist a driver to confirm the safe vehicle distance through a vehicle distance knowledge structure distributed on each single lane, thereby realizing effective, clear and differentiated vehicle distance prompt for the single lane.

For the convenience of understanding the present embodiment, first, a detailed description will be given of a lane-level vehicle distance confirmation system for expressways according to an embodiment of the present invention, referring to a schematic structure diagram of a lane-level vehicle distance confirmation system for expressways shown in fig. 1, the lane-level vehicle distance confirmation system includes: the control terminal 1, the vehicle measuring structure 2 and the vehicle distance indicating structure 3 are respectively in communication connection with the vehicle measuring structure 2 and the vehicle distance indicating structure 3.

In one embodiment, the vehicle measurement structure 2 is disposed on each single lane of the expressway, and a plurality of vehicle measurement structures 2 are disposed in each single lane, and the vehicle measurement structures 2 are used for sending an axle load signal of the vehicle to the control terminal when the vehicle is detected to pass through the single lane. In one example, two or more vehicle measurement structures 2 should be deployed on each single lane.

Wherein the distance between two adjacent vehicle measurement structures 2 is not fixed, in one example the distance between two adjacent vehicle measurement structures 2 is not more than 3 meters.

For example, assuming that two vehicle measurement structures 2 are deployed in a single lane, when a vehicle passes through the single lane, the two vehicle measurement structures 2 will be triggered in sequence to send an axle load signal of the vehicle, and it should be noted that the axle load signal carries time information, and the time information may represent the time of generating the axle load signal or the time of sending the axle load signal.

In one embodiment, the control terminal 1 is configured to determine a target safe distance corresponding to the vehicle according to the axle load signal and the current environmental data of the vehicle, and control the distance indicating structure 3 disposed on the single lane according to the target safe distance to prompt the vehicle.

In one example, the control terminal 1 may be disposed outside a median or a roadside guardrail of an expressway, to which the embodiment of the present invention is not limited.

In one example, the control terminal 1 may dock with a local weather platform to obtain a local weather condition, and use the weather condition as current environmental data, and combine an axle load signal of a vehicle and time information carried by the axle load signal to comprehensively determine a target safe vehicle distance, so as to send a control signal to a vehicle distance indication structure on a corresponding single lane according to the target safe vehicle distance, so as to prompt the vehicle distance through the vehicle distance indication structure.

According to the lane-level vehicle distance confirmation system for the expressway, the vehicle measurement structure and the vehicle distance indication structure are arranged on each single lane of the expressway, for each single lane, the axle load signal of a vehicle passing through the single lane is detected through the vehicle measurement structure, so that the target safe vehicle distance is comprehensively determined through the control terminal in combination with the axle load signal and the current environment data.

In order to facilitate understanding of the vehicle measurement structure, the embodiment of the invention provides a vehicle measurement structure which is deployed in a measurement area on each single lane of a highway, wherein the measurement area can be provided with N measurement modules, and N is more than or equal to 2. When N is more than 2, the accuracy and reliability of the measurement result can be improved, and the system can still keep a normal working state under the condition that some sensors are damaged or malfunction. In addition, the multiple sets of measurement modules can also be used for checking measurement results.

Specifically, the vehicle measurement structure comprises a sensor array and a wireless transmission module, and the wireless transmission module is respectively in communication connection with the sensor array and the control terminal. Wherein the sensor array is used for detecting axle load signals of vehicles passing through a single lane; the wireless transmission module is used for sending the axle load signal to the control terminal.

In one example, the sensor array includes at least one piezoelectric sensor, and/or at least one geomagnetic sensor. Wherein the plurality of geomagnetic sensors may be referred to as a geomagnetic sensor matrix. In practical application, each vehicle measurement module is provided with at least 1 piezoelectric sensor module, and the piezoelectric sensor modules can improve the accuracy and reliability of the measurement result and can also be used for checking the measurement result; the geomagnetic sensor matrix is not limited to the number and arrangement of geomagnetic sensors. In practical application, if the wireless transmission module does not support simultaneous transmission of signals generated by a plurality of piezoelectric sensors or a plurality of geomagnetic sensors, a plurality of wireless transmission modules can be set, that is, one piezoelectric sensor corresponds to one wireless transmission module, and one geomagnetic sensor corresponds to one wireless transmission module; if the wireless transmission module supports the simultaneous transmission of signals generated by a plurality of piezoelectric sensors or a plurality of geomagnetic sensors, only one wireless transmission module may be provided.

For example, referring to the schematic structure of one vehicle measurement structure shown in fig. 2, fig. 2 illustrates two vehicle measurement structures, denoted as a vehicle measurement structure a and a vehicle measurement structure b, disposed within the measurement area, each vehicle measurement structure including a wireless transmission module, 2 piezoelectric sensors, and 1 geomagnetic sensor array. The distance between the vehicle measuring structure a and the vehicle measuring structure b is L, and the distance L can be used to measure the vehicle speed data of the vehicle. Alternatively, the vehicle measurement structures in the measurement zone need not be equally spaced. Alternatively, the recommended distance L is not more than 3 meters, and the vehicle speed may be considered as a constant speed state, and the specific value of the distance L is not limited herein, and may be selected to be an appropriate value according to actual situations.

The vehicle runs along the running direction on a single lane, firstly, the vehicle is detected by a piezoelectric sensor and a geomagnetic sensor in a first vehicle measuring structure a, and signals are generated and sent to a control terminal through a wireless transmission module; when passing through the second vehicle measurement structure b, the piezoelectric sensor and the geomagnetic sensor in the vehicle measurement structure b generate signals and send the signals to the control terminal through the wireless transmission module, and the control terminal can determine the speed data of the vehicle according to the time information carried by the signals received twice and the distance between the vehicle measurement structure a and the vehicle measurement structure b. In addition, the signal generated by the piezoelectric sensor is an axle load signal, and the axle load signal can be used for determining the weight of the vehicle, so that the control terminal can determine the weight data of the vehicle when receiving the axle load signal. And finally, the control terminal combines the vehicle speed data, the vehicle weight data and the current environment data to determine the target safety distance of the vehicle.

In order to facilitate understanding of the above-mentioned vehicle distance indicating structure, the embodiment of the present invention further provides a vehicle distance indicating structure, see the following structures one to two:

structure one: the vehicle distance indicating structure comprises a first vehicle distance indicating structure and a second vehicle distance indicating structure, and the first vehicle distance indicating structure and the second vehicle distance indicating structure are respectively arranged on two sides of the single lane. The specific structures of the first vehicle distance indicating structure and the second vehicle distance indicating structure are the same. For example, assuming that the expressway includes 3 single lanes, the lanes are a single lane c1, a single lane c2, and a single lane c3 in order from left to right, a first distance indicating structure is deployed on the left side of the single lane c1, a second distance indicating structure is deployed on the right side of the single lane c2, a first distance indicating structure is deployed on the left side of the single lane c2, a second distance indicating structure is deployed on the right side of the single lane c3, and a first distance indicating structure is deployed on the left side of the single lane c 3.

And (2) a structure II: the vehicle distance indicating structure comprises a plurality of LED (Light-Emitting Diode) indicating lamps, each LED indicating lamp is sequentially arranged at the downstream of the measuring area according to a designated interval, and the LED indicating lamps are used for receiving LED control signals sent by the control terminal and sending out prompt lights with different colors according to the LED control signals. Alternatively, the LED indicator light may be powered by active or solar energy.

In one embodiment, a single lane is marked with a measurement zone and a distance confirmation zone downstream of the measurement zone, with a distance confirmation starting point marking marked at the starting point of the distance confirmation zone. In addition, a measurement start mark such as a road side sign, or an LED indicator light or the like can be arranged at the measurement area to prompt the driver that the measurement area is currently entered.

On the basis, if the distance between the LED indicator lamp and the vehicle distance confirmation starting point marking is smaller than the target safety vehicle distance, the LED indicator lamp emits prompt light of a first color, and if the distance between the LED indicator lamp and the measurement area is larger than the target safety vehicle distance, the LED indicator lamp emits prompt light of a second color. In one example, after determining a target safe vehicle distance, the control terminal determines an LED indicator light with a distance smaller than the target safe vehicle distance from the LED indicator lights, and sends a first LED control signal to the LED indicator light to send out orange light from the LED indicator light in the target safe vehicle distance; and simultaneously, sending a second LED control signal to an LED indicator light with a distance smaller than the target safety vehicle distance from the vehicle distance confirmation starting point marking, so that the LED indicator light outside the target safety vehicle distance emits green light, and the driver of the vehicle is prompted. The meaning of the lamp light is as follows: if the LED indicator lights near the position of the front vehicle of the vehicle emit orange light, the vehicle distance between the vehicle and the front vehicle is too close (smaller than the target safety vehicle distance), and the vehicle needs to be decelerated; if the LED indicator lights near the position of the front vehicle of the vehicle emit green light, the vehicle distance between the vehicle and the front vehicle is proper (greater than or equal to the target safety vehicle distance), and the vehicle can normally run.

In one embodiment, when the LED indicator is deployed, it is recommended that the LED indicator deployment distance in a single vehicle distance confirmation zone is not less than a specific distance (which may be combined with road conditions and experience), such as 150m or 200m. Because if the LED indicator light deployment distance is short (e.g., 50 m), the indicator light may be smaller than the initial safe distance (e.g., 100 m), so that the LED indicator light can only display one color (the indicator light of the first color too close to the distance) in the distance confirmation area, the driver cannot accurately know the target safe distance through the indicator light of the second color.

In one embodiment, the LED indicator lights may be automatically extinguished after a preset period of time. Illustratively, the LED indicator lights will automatically go out after a certain period of time (such as 3 seconds) to avoid causing the LED indicator lights to go on once a vehicle passes.

In order to facilitate understanding of the above control terminal, the embodiment of the present invention further provides a control terminal, referring to a schematic diagram of a control terminal shown in fig. 3, the control terminal includes a power supply, a CPU (Central Processing Unit ), a memory, a storage, a wireless receiving module, and a wireless transmitting module. The power supply is used for supplying power to the CPU, the memory, the storage, the wireless receiving module and the wireless transmitting module; the CPU is used for determining a target safe vehicle distance according to the vehicle weight data, the vehicle speed data and the weather conditions; the memory is used for temporarily storing CPU operation data, storing data, the wireless receiving module is used for receiving axle load signals sent by the vehicle measuring structure, and the wireless sending module is used for sending control signals to the vehicle distance indicating structure.

In summary, the principle of the embodiment of the present invention is as follows: the measuring area is provided with a plurality of groups of vehicle measuring modules consisting of piezoelectric sensors and geomagnetic sensor matrixes, the speed and the weight of vehicles passing through a single lane are measured at the same time, and the current environment data are combined to calculate the proper target safe vehicle distance. The vehicle distance confirmation area is provided with LED indicator lights on two sides of each single lane, and the drivers are assisted by the LED indicator lights with different colors to inform the drivers of the current proper safe vehicle distance. The driver can confirm whether the distance between the driver and the front vehicle is reasonable by observing the indicator lamp and combining the relative position of the front vehicle. The lane-level distance system can be used for carrying out differentiated distance confirmation reminding on each lane by combining the states (including the weight data and the speed data) of the passing vehicles.

The core scheme of the embodiment of the invention comprises a piezoelectric sensor, a geomagnetic sensor matrix, a wireless transmission module, an LED indicator light and a control terminal. The piezoelectric sensor, the geomagnetic sensor matrix and the wireless transmission module form a vehicle measurement structure, and the vehicle measurement structure is arranged in each single lane. The LED indicator lamps are arranged on two sides of each single lane according to a certain rule, can be active LED indicator lamps or solar LED indicator lamps, and can be controlled by switching through wireless signals. The control terminal may be disposed outside the middle belt or the roadside guard rail, without specific limitation.

For the convenience of understanding the above embodiments, the embodiment of the present invention provides a specific structure of a lane-level vehicle distance confirmation system for an expressway, referring to a schematic structure of another lane-level vehicle distance confirmation system shown in fig. 4, fig. 4 is an expressway with one-way three lanes, and has a hard shoulder. In fig. 4, taking a single lane c2 as an example, the lane-level vehicle distance confirmation system is composed of a measurement area and a vehicle distance confirmation area, and the control terminal is arranged in the middle sub-band. The speed data and axle load information of the vehicle can be accurately and timely measured by the vehicle measuring structure when the vehicle of the single lane c2 passes through the measuring area, and the speed data and the axle load information are sent to the control terminal through the wireless transmission module. After receiving the measured value (including axle load information), the control terminal calculates a proper safe vehicle distance by combining time information carried by the measured value and weather conditions (namely, current environment data).

The safe vehicle distance can be displayed by different colors through the LED indicator lights of the vehicle distance confirmation area so as to accurately inform a driver of the proper safe distance. For example, too close a vehicle distance may be displayed in red or orange, and a suitable vehicle distance may be displayed in green. And a driver can evaluate whether the distance between the driver and the front vehicle is reasonable or not through the LED indicator lamp. In order to facilitate understanding, the embodiment of the invention also provides an application example of the lane-level vehicle distance confirmation system of the expressway, referring to a schematic structure diagram of another lane-level vehicle distance confirmation system of the expressway shown in fig. 5, fig. 5 illustrates that a vehicle driven by a driver in a single lane c2 is a vehicle X, after the vehicle passes through a measurement area, the system calculates a proper safety distance, and the safety distance is displayed in different colors through LED indicator lamps on two sides of the single lane c 2. The filled LED indicator light represents orange, and the orange is too close to the vehicle distance; the white LED indicator light indicates green, and green is suitable car distance, and the black LED indicator light indicates that the indicator light is unlit. In fig. 5, the distance between the vehicle X and the front vehicle Y driven by the driver is too short, and the distance between the vehicle X and the front vehicle Z is relatively suitable. Thus, the driver should appropriately decelerate to increase the distance from the preceding vehicle Y. The vehicle distance confirmation systems of the 3 lanes independently run, and can be combined with the state of the passing vehicle to confirm and remind the differentiated vehicle distance of each lane.

In summary, the lane-level vehicle distance confirmation system for the expressway provided by the embodiment of the invention has at least the following characteristics:

(1) By adopting the scheme of the embodiment of the invention, the speed and the weight of the passing vehicle can be accurately measured by adopting the piezoelectric sensor, the module and the geomagnetic sensor matrix and are wirelessly transmitted to the road side control terminal, so that the safety distance suitable for the current lane is calculated, and the LED indicator lights are used for reminding drivers of keeping the proper safety distance. Through the LED that sets up in every lane both sides, with the pilot lamp of different colours auxiliary driver confirms safe car distance, the visual distance of LED pilot lamp is far away, and the effect is obvious at night and under bad weather. Lane-level differential distance confirmation can be performed on a multi-lane highway.

(2) Compared with the current static safety distance scheme or the scheme that the safety distance is obtained only by measuring the vehicle speed, the embodiment of the invention combines and considers different safety distances caused by the vehicle speed and the vehicle weight, can realize the safety vehicle distance confirmation of lane differentiation according to the state of the vehicle, and has practical significance in popularization.

(3) According to the embodiment of the invention, a portal frame is not required to be installed, expensive equipment such as a camera or a radar is not required to be used for measuring the speed, the cost is low, the construction is convenient, and the maintenance is easy.

For the method for confirming the lane-level distance of the expressway provided in the foregoing embodiment, the embodiment of the present invention further provides a method for confirming the lane-level distance of the expressway, which is applied to the control terminal in the system for confirming the lane-level distance of the expressway provided in the foregoing embodiment, referring to a flow chart of the method for confirming the lane-level distance of the expressway shown in fig. 6, and the method mainly includes steps S602 to S606 as follows:

step S602, receiving an axle load signal of each vehicle measurement structure in the single lane. Wherein the axle load signal carries time information. For example, assume that two vehicle measurement structures, denoted as a vehicle measurement structure a and a vehicle measurement structure b, are disposed within the measurement area, and axle load signals of the vehicles transmitted by the vehicle measurement structure a and the vehicle measurement structure b are sequentially received.

Step S604, determining a target safety distance corresponding to the vehicle according to the axle load signal and the current environment data of the vehicle. Wherein the current environmental data is also known as weather conditions. In one embodiment, the vehicle weight data of the vehicle can be determined according to the axle load signal, in addition, the vehicle speed data of the vehicle can be determined according to the time information carried by the axle load signal and the distance between two vehicle measuring structures, the initial safety distance can be determined according to the vehicle weight data and the vehicle speed data, and the target safety distance can be obtained by adjusting the initial safety distance by utilizing the weather condition. Specifically, see the following steps 1 to 3:

Step 1, determining the weight data of a vehicle according to a shaft load signal; and determining the speed data of the vehicle according to the time information carried by the axle load signal sent by the current vehicle measurement structure, the time information carried by the axle load signal sent by the next vehicle measurement structure and the distance between the current vehicle measurement structure and the next vehicle measurement structure. In practical application, the axle load signal is the maximum whole vehicle weight allowed to be shared by each axle, so that the vehicle weight signal can be determined according to the axle load signal; in addition, the speed data of the vehicle can be calculated according to the time interval between the two axle load signals and the distance between the two vehicle measuring structures. Specifically, the calculation method is as follows: the distance between two vehicle measurement structures is L (unit m), and the two measurement structures respectively send two axle load signals at the time t1 and the time t2 (t 2> t1 and unit s), so that the vehicle speed calculation formula is as follows: v=3.6×l/(t 2-t 1), in km/h.

And 2, determining the initial safety distance corresponding to the vehicle according to the weight data and the speed data. In one embodiment, the initial safe distance is positively correlated with the weight data and the initial safe distance is positively correlated with the speed data. I.e. the greater the initial safe distance when the vehicle is heavier/the faster the vehicle speed; conversely, the lighter the vehicle/the slower the vehicle speed, the smaller the initial safe distance.

And 3, adjusting the initial safety vehicle distance according to the current environment data to determine the target safety vehicle distance corresponding to the vehicle. In practical applications, the initial safety distance should be properly increased in weather conditions such as rainy days, snowy days, foggy days, etc., as compared with weather conditions such as sunny days. In an alternative embodiment, multiple types of current environmental data, such as temperature, weather, whether there is fog, may be preconfigured, and weight coefficients, which may be empirical values, may be configured for each type of current environmental data, and then the product of the respective weight coefficients is calculated as the total weight, and the product of the total weight and the initial safe distance is taken as the target safe distance.

Step S606, controlling a vehicle distance indicating structure deployed on a single lane to prompt the vehicle for the vehicle distance according to the target safe vehicle distance. In one embodiment, see steps one through two below:

step one, determining a first LED indicator light with a distance smaller than a target safety vehicle distance from an LED indicator light included in a vehicle distance indicating structure, and sending a first LED control signal to the first LED indicator light so that the first LED indicator light sends out prompt light with a first color;

And step two, determining a second LED indicator light with the distance between the second LED indicator light and the measuring area being greater than the target safety distance from the LED indicator lights included in the vehicle distance indicating structure, and sending a second LED control signal to the second LED indicator light so that the second LED indicator light sends out prompt light with a second color.

In one embodiment, the distance between each LED indicator and the measurement area may be stored in advance, and then it is determined whether the distance corresponding to each LED indicator is smaller than the target safe distance, if so, the LED indicator is determined to be the first LED indicator, and the LED indicator is controlled to emit a first color indicator; if not, determining the LED indicator lamp as a second LED indicator lamp, and controlling the LED indicator lamp to emit an indicator lamp with a second color.

For easy understanding, the embodiment of the present invention further provides a specific implementation manner of a lane-level vehicle distance confirmation method for an expressway, referring to fig. 7, which is a schematic flow chart of another lane-level vehicle distance confirmation method for an expressway, and the method mainly includes the following steps S702 to S710:

in step S702, a vehicle measurement structure in a measurement zone measures an axle load signal of a vehicle as the vehicle passes through the measurement zone.

In step S704, the wireless transmission module sends the axle load signal to the control terminal.

Step S706, the control terminal calculates the target safe vehicle distance.

In step S708, the control terminal sends an LED control signal to the LED indicator.

In step S710, the LED indicator lights in the distance confirmation area are turned on, so that the driver confirms the distance according to the light color of the LED indicator lights.

According to the lane-level vehicle distance confirmation method for the expressway, the vehicle measuring structure and the vehicle distance indication structure are arranged on each single lane of the expressway, for each single lane, the axle load signal of a vehicle passing through the single lane is detected through the vehicle measuring structure, so that the target safe vehicle distance is comprehensively determined through the control terminal in combination with the axle load signal and the current environment data.

The method provided by the embodiment of the present invention has the same implementation principle and technical effects as those of the embodiment of the device, and for the sake of brief description, reference may be made to the corresponding content in the embodiment of the device where the embodiment of the method is not mentioned.

The embodiment of the invention provides a control terminal, which specifically comprises a processor and a storage device; the storage means has stored thereon a computer program which, when executed by the processor, performs the method of any of the embodiments described above.

Fig. 8 is a schematic structural diagram of a control terminal according to an embodiment of the present invention, where the control terminal 100 includes: a processor 80, a memory 81, a bus 82 and a communication interface 83, the processor 80, the communication interface 83 and the memory 81 being connected by the bus 82; the processor 80 is arranged to execute executable modules, such as computer programs, stored in the memory 81.

The memory 81 may include a high-speed random access memory (RAM, random Access Memory), and may further include a non-volatile memory (non-volatile memory), such as at least one magnetic disk memory. The communication connection between the system network element and at least one other network element is implemented via at least one communication interface 83 (which may be wired or wireless), and may use the internet, a wide area network, a local network, a metropolitan area network, etc.

Bus 82 may be an ISA bus, a PCI bus, an EISA bus, or the like. The buses may be classified as address buses, data buses, control buses, etc. For ease of illustration, only one bi-directional arrow is shown in FIG. 8, but not only one bus or type of bus.

The memory 81 is configured to store a program, and the processor 80 executes the program after receiving an execution instruction, and the method executed by the apparatus for flow defining disclosed in any of the foregoing embodiments of the present invention may be applied to the processor 80 or implemented by the processor 80.

The processor 80 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuitry in hardware or instructions in software in processor 80. The processor 80 may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but may also be a digital signal processor (Digital Signal Processing, DSP for short), application specific integrated circuit (Application Specific Integrated Circuit, ASIC for short), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA for short), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory 81 and the processor 80 reads the information in the memory 81 and in combination with its hardware performs the steps of the method described above.

The computer program product of the readable storage medium provided by the embodiment of the present invention includes a computer readable storage medium storing a program code, where the program code includes instructions for executing the method described in the foregoing method embodiment, and the specific implementation may refer to the foregoing method embodiment and will not be described herein.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A lane-level distance confirmation system for an expressway, comprising: the control terminal is respectively in communication connection with the vehicle measuring structure and the vehicle distance indicating structure; wherein,,

The vehicle measurement structures are deployed on each single lane of the expressway, a plurality of vehicle measurement structures are deployed in each single lane, and the vehicle measurement structures are used for sending axle load signals of vehicles to the control terminal when the vehicles are detected to pass through the single lane;

the control terminal is used for determining a target safety distance corresponding to the vehicle according to the axle load signal and the current environment data of the vehicle, and controlling the distance indication structure deployed on the single lane according to the target safety distance to prompt the vehicle.

2. The highway lane-level vehicle distance confirmation system according to claim 1, wherein the vehicle measurement structure comprises a sensor array and a wireless transmission module, and the wireless transmission module is respectively in communication connection with the sensor array and the control terminal; wherein,,

the sensor array is used for detecting axle load signals of vehicles passing through the single lane;

the wireless transmission module is used for sending the axle load signal to the control terminal.

3. The highway lane-level headway confirmation system of claim 2, wherein the sensor array comprises at least one piezoelectric sensor and/or at least one geomagnetic sensor.

4. The highway lane-level headway confirmation system of claim 1, wherein the headway indicating structure comprises a first headway indicating structure and a second headway indicating structure, the first headway indicating structure and the second headway indicating structure being disposed on either side of the single lane, respectively.

5. The highway lane-level headway confirmation system of claim 1, wherein the single lanes are marked with a measurement zone and a headway confirmation zone, the headway confirmation zone being located downstream of the measurement zone, the headway confirmation zone being marked with headway confirmation starting point markings at a starting point thereof, the vehicle measurement structure being disposed within the measurement zone on each single lane of the highway, the headway indication structure comprising a plurality of LED indicators, each LED indicator being disposed downstream of the measurement zone in turn at specified intervals;

the LED indicator lamp is used for receiving the LED control signal sent by the control terminal and sending out prompt lights with different colors according to the LED control signal;

and if the distance between the LED indicator lamp and the vehicle distance confirmation starting point marking is greater than the target safety vehicle distance, the LED indicator lamp emits prompting light of a second color.

6. A lane-level distance confirmation method of an expressway, characterized in that the method is applied to a control terminal in a lane-level distance confirmation system of an expressway according to any one of claims 1 to 5, the method comprising:

receiving axle load signals of vehicles sent by each vehicle measuring structure in a single lane;

determining a target safety distance corresponding to the vehicle according to the axle load signal and the current environment data of the vehicle;

and controlling a vehicle distance indicating structure arranged on the single lane to prompt the vehicle distance according to the target safety vehicle distance.

7. The method for lane-level headway confirmation of an expressway according to claim 6, wherein determining a target safe headway corresponding to the vehicle based on the axle load signal and current environmental data of the vehicle comprises:

determining vehicle weight data of the vehicle according to the axle load signal; determining the speed data of the vehicle according to the time information carried by the axle load signal sent by the current vehicle measurement structure, the time information carried by the axle load signal sent by the next vehicle measurement structure and the distance between the current vehicle measurement structure and the next vehicle measurement structure;

Determining an initial safety vehicle distance corresponding to the vehicle according to the vehicle weight data and the vehicle speed data;

and adjusting the initial safety distance according to the current environment data to determine the target safety distance corresponding to the vehicle.

8. The method of claim 6, wherein controlling the distance indication structure disposed on the single lane to prompt the vehicle according to the target safe distance comprises:

determining a first LED indicator light with a distance smaller than the target safety distance from an LED indicator light included in a vehicle distance indicating structure, and sending a first LED control signal to the first LED indicator light so that the first LED indicator light sends out prompt light with a first color;

and determining a second LED indicator light with the distance between the second LED indicator light and the vehicle distance confirmation starting point marking larger than the target safety vehicle distance from the LED indicator lights included in the vehicle distance indication structure, and sending a second LED control signal to the second LED indicator light so that the second LED indicator light sends out prompt light with a second color.

9. A control terminal comprising a processor and a memory, the memory storing computer executable instructions executable by the processor, the processor executing the computer executable instructions to implement the method of any one of claims 6 to 8.

10. A computer readable storage medium storing computer executable instructions which, when invoked and executed by a processor, cause the processor to implement the method of any one of claims 6 to 8.