CN111540236A - Method for predicting collision situation of left-turning motor vehicle and non-motor vehicle in intersection - Google Patents
Method for predicting collision situation of left-turning motor vehicle and non-motor vehicle in intersection Download PDFInfo
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Abstract
The invention discloses a method for predicting the collision between a left-turning motor vehicle and a non-motor vehicle in a cross port, when the motor vehicle turns on a left turn light to enter a service area, a first signal transmitter at the motor vehicle transmits a first signal to a signal receiver, the signal receiver transmits each first signal to a microcomputer, when the non-motor vehicle turns on the left turn light to enter the service area, a second signal transmitter at the non-motor vehicle transmits a second signal to the signal receiver respectively, the signal receiver transmits the second signal to the microcomputer, the microcomputer calculates the first position coordinates of each motor vehicle and the second position coordinates of the non-motor vehicle, determines the non-motor vehicle nearest to each motor vehicle, predicts whether the collision between each motor vehicle and the nearest non-motor vehicle will occur according to the distance between each motor vehicle and the nearest non-motor vehicle, so as to alert the corresponding vehicle and non-vehicle, respectively, when it is determined that a collision is about to occur between the vehicle and the nearest non-vehicle.
Description
Technical Field
The invention relates to the technical field of traffic safety, in particular to a method for predicting a collision situation between a left-turning motor vehicle and a non-motor vehicle in a crossing.
Background
At present, most crossroads on roads are four-phase signal intersections, when traffic signal lamps are in a left-turn signal phase, a scene that left-turn motor vehicles and left-turn non-motor vehicles are mixed occurs, and under the condition of good weather conditions or less left-turn traffic flow, the collision condition of rubbing and rubbing is not easy to occur; however, in the case of poor weather conditions (rain, heavy fog, etc.) or a large left-turn traffic flow, it is likely that a collision between a vehicle and a non-vehicle occurs due to limited visibility or insufficient concentration of energy by a vehicle driver or a non-vehicle driver.
Disclosure of Invention
Aiming at the problems, the invention provides a method for predicting the collision situation of a left-turning motor vehicle and a non-motor vehicle in a cross opening.
In order to achieve the purpose of the invention, the invention provides a method for predicting the collision situation of a left-turning motor vehicle and a non-motor vehicle in a cross port, which comprises the following steps:
s10, when each motor vehicle turns on the left turn signal lamp to enter the service area, the plurality of first signal transmitters arranged at each motor vehicle respectively transmit first signals to the signal receiver, and the signal receiver transmits each first signal to the microcomputer; the first signal carries the number of the motor vehicle where the corresponding first signal transmitter is located;
s20, when each non-motor vehicle turns on the left turn signal lamp to enter the service area, the plurality of second signal transmitters arranged at each non-motor vehicle respectively transmit second signals to the signal receiver, and the signal receiver transmits each second signal to the microcomputer; the second signal carries the number of the non-motor vehicle where the corresponding second signal transmitter is located;
and S30, the microcomputer calculates first position coordinates of each motor vehicle according to each first signal corresponding to each motor vehicle, calculates second position coordinates of each non-motor vehicle according to each second signal corresponding to each non-motor vehicle, determines the non-motor vehicle closest to each motor vehicle according to each first position coordinate and each second position coordinate, and predicts whether collision will occur between each motor vehicle and the closest non-motor vehicle according to the distance between each motor vehicle and the closest non-motor vehicle.
In one embodiment, a first signal transmitter is arranged at the front right steering lamp of the motor vehicle, and a first signal transmitter is arranged at the rear right steering lamp of the motor vehicle;
the microcomputer calculating the first position coordinates of each vehicle according to each first signal corresponding to each vehicle includes:
the microcomputer determines the current front right steering lamp position of the motor vehicle according to a first signal corresponding to a first signal transmitter at the front right steering lamp, determines the current rear right steering lamp position of the motor vehicle according to a first signal corresponding to a first signal transmitter at the rear right steering lamp, and determines the first position coordinate of the motor vehicle according to the front right steering lamp position and the rear right steering lamp position.
In one embodiment, a second signal transmitter is arranged at the left handle bar of the non-motor vehicle, and a second signal transmitter is arranged at the rear left turn light of the non-motor vehicle;
the microcomputer calculating the second position coordinates of each non-motor vehicle according to each second signal corresponding to each non-motor vehicle includes:
the microcomputer determines the current left handlebar position of the non-motor vehicle according to a second signal corresponding to a second signal transmitter at the left handlebar, determines the current rear left turn light position of the non-motor vehicle according to a second signal corresponding to a second signal transmitter at the rear left turn light, and determines the second position coordinate of the non-motor vehicle according to the left handlebar position and the rear left turn light position.
In one embodiment, predicting whether a collision between a motor vehicle and a nearest non-motor vehicle based on a distance between the motor vehicle and the nearest non-motor vehicle comprises:
if the distance between the motor vehicle and the nearest non-motor vehicle is greater than or equal to the distance threshold value, determining that no collision occurs between the motor vehicle and the nearest non-motor vehicle;
and if the distance between the motor vehicle and the nearest non-motor vehicle is less than the distance threshold value, determining that the collision between the motor vehicle and the nearest non-motor vehicle will occur.
As an embodiment, after determining that a collision will occur between the vehicle and the nearest non-vehicle, further comprising:
the alarm is respectively given by a first alarm arranged in the motor vehicle and a second alarm arranged at a non-motor vehicle nearest to the motor vehicle.
The method for predicting the collision situation between the left-turning motor vehicle and the non-motor vehicle in the intersection comprises the steps that when the motor vehicle turns on the left turn light to enter a service area, a plurality of first signal transmitters arranged at the motor vehicle respectively transmit first signals to a signal receiver, the signal receiver transmits the first signals to a microcomputer, the microcomputer can obtain the first signals corresponding to the motor vehicles entering the service area and turning on the left turn light, when the non-motor vehicle turns on the left turn light to enter the service area, a plurality of second signal transmitters arranged at the non-motor vehicle respectively transmit second signals to the signal receiver, the signal receiver transmits the second signals to the microcomputer, the microcomputer can obtain the second signals corresponding to the non-motor vehicles entering the service area and turning on the left turn light, and the first position coordinates of the motor vehicles are calculated according to the first signals corresponding to the motor vehicles, and calculating second position coordinates of the non-motor vehicles according to the second signals corresponding to the non-motor vehicles, determining the non-motor vehicle closest to the non-motor vehicles according to the first position coordinates and the second position coordinates, and predicting whether the collision between the non-motor vehicles and the closest non-motor vehicle will occur according to the distance between the non-motor vehicles and the closest non-motor vehicle, so that when the collision between the non-motor vehicle and the closest non-motor vehicle is determined, the alarm is given to the corresponding non-motor vehicle and the corresponding motor vehicle respectively, and the safety of the motor vehicle and the non-motor vehicle in the driving process is ensured.
Drawings
FIG. 1 is a flow chart of a method for predicting a left turn vehicle collision with a non-vehicle in an intersection according to one embodiment;
FIG. 2 is a schematic distance diagram of a motor vehicle and a non-motor vehicle according to an embodiment;
FIG. 3 is a schematic view of a kinematic location between a motor vehicle and a non-motor vehicle according to an embodiment;
FIG. 4 is a schematic view of the direction of movement between a motor vehicle and a non-motor vehicle according to an embodiment;
FIG. 5 is a schematic illustration of distance thresholds between a motor vehicle and a non-motor vehicle according to an embodiment;
FIG. 6 is a schematic view of a vehicle coordinate position determination of one embodiment;
FIG. 7 is an intersection schematic of an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, fig. 1 is a flowchart of a method for predicting a collision between a left-turn vehicle and a non-vehicle in a crossing, according to an embodiment, including the steps of:
s10, when each motor vehicle turns on the left turn signal lamp to enter the service area, the plurality of first signal transmitters arranged at each motor vehicle respectively transmit first signals to the signal receiver, and the signal receiver transmits each first signal to the microcomputer; the first signal carries the number of the vehicle in which the corresponding first signal transmitter is located.
The service area may include an area surrounded by pillars where traffic lights (e.g., traffic lights) are disposed at an intersection (e.g., an intersection). The signal receiver can be arranged on the support posts of the traffic signal lamps, for example, one signal receiver can be arranged on each support post of each traffic signal lamp. The signal receiver may receive signals (e.g., a first signal and a second signal) transmitted by respective signal transmitters (including a first signal transmitter and a second signal transmitter) in a corresponding service area. The microcomputer can be arranged on a pillar of a certain traffic signal lamp corresponding to a service area, can also be arranged in a control room and the like corresponding to the service area, can receive signals sent by all the signal receivers, can also output prediction information of whether a motor vehicle and a related non-motor vehicle in the service area are about to collide, and sends alarm information to the motor vehicle and the related non-motor vehicle after judging that the motor vehicle and the related non-motor vehicle are about to collide.
Specifically, when a motor vehicle turns on a left turn light and enters a service area, each first signal transmitter arranged at the motor vehicle transmits a first signal to a signal receiver respectively, and the signal receiver transmits each first signal to a microcomputer; each first signal corresponding to the motor vehicle carries the number of the motor vehicle, so that the microcomputer can determine the motor vehicle corresponding to each first signal. Each first signal corresponding to the motor vehicle can also carry the position information of the first signal emitter corresponding to the corresponding first signal on the motor vehicle, so that the microcomputer can acquire the relevant information of the first signal emitter corresponding to each first signal.
S20, when each non-motor vehicle turns on the left turn signal lamp to enter the service area, the plurality of second signal transmitters arranged at each non-motor vehicle respectively transmit second signals to the signal receiver, and the signal receiver transmits each second signal to the microcomputer; the second signal carries the number of the non-motor vehicle in which the corresponding second signal transmitter is located.
Specifically, when a certain non-motor vehicle turns on a left turn signal lamp to enter a service area, each second signal transmitter arranged at the non-motor vehicle transmits a second signal to the signal receiver respectively, and the signal receiver transmits each second signal to the microcomputer; each second signal corresponding to the non-motor vehicle carries the number of the motor vehicle, so that the microcomputer can determine the non-motor vehicle corresponding to each second signal. Each second signal corresponding to the non-motor vehicle can also carry the position information of a second signal transmitter corresponding to the corresponding second signal on the non-motor vehicle, so that the microcomputer can acquire the related information of the second signal transmitter corresponding to each second signal.
And S30, the microcomputer calculates first position coordinates of each motor vehicle according to each first signal corresponding to each motor vehicle, calculates second position coordinates of each non-motor vehicle according to each second signal corresponding to each non-motor vehicle, determines the non-motor vehicle closest to each motor vehicle according to each first position coordinate and each second position coordinate, and predicts whether collision will occur between each motor vehicle and the closest non-motor vehicle according to the distance between each motor vehicle and the closest non-motor vehicle.
The method for predicting the collision situation between the left-turning motor vehicle and the non-motor vehicle in the intersection comprises the steps that when the motor vehicle turns on the left turn light to enter a service area, a plurality of first signal transmitters arranged at the motor vehicle respectively transmit first signals to a signal receiver, the signal receiver transmits the first signals to a microcomputer, the microcomputer can obtain the first signals corresponding to the motor vehicles entering the service area and turning on the left turn light, when the non-motor vehicle turns on the left turn light to enter the service area, a plurality of second signal transmitters arranged at the non-motor vehicle respectively transmit second signals to the signal receiver, the signal receiver transmits the second signals to the microcomputer, the microcomputer can obtain the second signals corresponding to the non-motor vehicles entering the service area and turning on the left turn light, and the first position coordinates of the motor vehicles are calculated according to the first signals corresponding to the motor vehicles, and calculating second position coordinates of the non-motor vehicles according to the second signals corresponding to the non-motor vehicles, determining the non-motor vehicle closest to the non-motor vehicles according to the first position coordinates and the second position coordinates, and predicting whether the collision between the non-motor vehicles and the closest non-motor vehicle will occur according to the distance between the non-motor vehicles and the closest non-motor vehicle, so that when the collision between the non-motor vehicle and the closest non-motor vehicle is determined, the alarm is given to the corresponding non-motor vehicle and the corresponding motor vehicle respectively, and the safety of the motor vehicle and the non-motor vehicle in the driving process is ensured.
In one embodiment, a first signal transmitter is arranged at the front right steering lamp of the motor vehicle, and a first signal transmitter is arranged at the rear right steering lamp of the motor vehicle;
the microcomputer calculating the first position coordinates of each vehicle according to each first signal corresponding to each vehicle includes:
the microcomputer determines the current front right steering lamp position of the motor vehicle according to a first signal corresponding to a first signal transmitter at the front right steering lamp, determines the current rear right steering lamp position of the motor vehicle according to a first signal corresponding to a first signal transmitter at the rear right steering lamp, and determines the first position coordinate of the motor vehicle according to the front right steering lamp position and the rear right steering lamp position.
Specifically, the first signal emitter is installed at the right side position (i.e. the position closest to the right side surface of the vehicle) in the hard lamp covers of the front right turn lamp and the rear turn lamp of the motor vehicle. When a motor vehicle turns on a left turn light to enter a service area, a signal transmitter at the front right turn light and the rear right turn light of the motor vehicle can transmit a signal (a first signal) to a fixedly arranged signal receiver in real time, the signal receiver transmits the signal to a microcomputer, and the coordinates (X) of the front right turn light of the motor vehicle are generated in the microcomputerm1,Ym1) Rear right turn light coordinate (X)m2,Ym2). Calculating the coordinate (X) of the middle position of the right side of the motor vehicle by utilizing the midpoint relation through the first two coordinatesm,Ym) And records its number: and a motor vehicle m (the m can be information which can represent the number of the motor vehicle such as the serial number of the motor vehicle entering the service area).
In one embodiment, a second signal transmitter is arranged at the left handle bar of the non-motor vehicle, and a second signal transmitter is arranged at the rear left turn light of the non-motor vehicle;
the microcomputer calculating the second position coordinates of each non-motor vehicle according to each second signal corresponding to each non-motor vehicle includes:
the microcomputer determines the current left handlebar position of the non-motor vehicle according to a second signal corresponding to a second signal transmitter at the left handlebar, determines the current rear left turn light position of the non-motor vehicle according to a second signal corresponding to a second signal transmitter at the rear left turn light, and determines the second position coordinate of the non-motor vehicle according to the left handlebar position and the rear left turn light position.
Specifically, when a non-motor vehicle turns on a left turn light to enter a service area, a signal transmitter at the left handle bar and a rear left turn light of the non-motor vehicle can transmit signals to a fixed signal receiver in real time, the signal receiver transmits the signals to a microcomputer, and coordinates (x) of the left handle bar of the non-motor vehicle are generated in the microcomputern1,yn1) Rear left indicator coordinate (x)n2,yn2). Calculating the coordinate (x) of the middle position of the left side of the non-motor vehicle by utilizing the midpoint relation through the first two coordinatesn,yn) And records its number: and a non-motor vehicle n (n can be information which can represent the number of the non-motor vehicle such as the serial number of the non-motor vehicle entering the service area).
In one embodiment, the process of the microcomputer calculating first position coordinates of each motor vehicle based on each first signal corresponding to each motor vehicle, calculating second position coordinates of each non-motor vehicle based on each second signal corresponding to each non-motor vehicle, and determining a non-motor vehicle nearest to each motor vehicle based on each first position coordinate and each second position coordinate includes:
when several motor vehicles and non-motor vehicles are driven in the service area simultaneously, the distance formula is passed through in the microcomputer
Calculating the distance D between the middle of the left side of the non-motor vehicle and the middle of the right side of the motor vehiclenmThen screening out the minimum value to obtain adjacent non-motor vehicles and determining the non-motor vehicle closest to each motor vehicle; wherein (X)m,Ym) Indicating the position coordinates (first position coordinates) of the motor vehicle m,(xn,yn) The position coordinates (second position coordinates) of the non-motor vehicle n are expressed.
In one example, as shown in FIG. 2, a distance D is calculated between the center of the left side of the first non-motor vehicle and the center of the right side of the first motor vehicle11Distance D between the middle of the left side of the first non-motor vehicle and the middle of the right side of the second non-motor vehicle12… distance D between the left middle of the first non-motor vehicle and the right middle of the m-th motor vehicle1mAnd then screening out the motor vehicle closest to the first non-motor vehicle by comparing the distance. The process of screening out the vehicle closest to the nth non-motor vehicle can be performed in the same manner as above. And screening out the non-motor vehicle closest to the mth motor vehicle.
Further, as shown in fig. 3, the movement conditions between the motor vehicle and the non-motor vehicle are divided into 3 types: (1) indicating that the motor vehicle and the non-motor vehicle run side by side; (2) indicating that the vehicle is behind a non-vehicle; (3) indicating that the vehicle preempts the non-vehicle. Based on the above 3 different motion situations, the calculation formula of the distance between the motor vehicle and the non-motor vehicle is divided into 3. The non-motor vehicle has larger randomness of the driving direction, so the change of the included angle between the driving direction and the driving direction of the motor vehicle is larger. Thus define: taking the driving direction of a motor vehicle as a standard direction and the driving direction of a non-motor vehicle to the left as a condition I; the driving direction of the non-motor vehicle deviates to the right (as shown in figure 4).
The calculation formula for the case (1) shown in fig. 3 is as follows:
slope of line segment formed by coordinates on the right side of the motor vehicle: km＝(Ym1-Ym2)/(Xm1-Xm2)
The line segment equation formed by the coordinates of the right side of the motor vehicle is as follows: kmX-Y+Ym1-Xm1Km＝0(Xm1≤X≤Xm2)
In the case (1), the non-motor vehicle has two traveling directions, as shown in fig. 4.
The distance from the left handlebar of the non-motor vehicle to the motor vehicle is as follows:
the distance from the rear left turn light of the non-motor vehicle to the motor vehicle is as follows:
then d1＝min{dn1,dn2}
The case (2) calculation formula is as follows:
distance from the rear left turn light of the non-motor vehicle to the front right turn light of the motor vehicle:
the case (3) calculation formula is as follows:
distance from left handlebar of non-motor vehicle to rear right steering lamp of motor vehicle:
d＝min{d1,d2,d3}。
in one embodiment, predicting whether a collision between a motor vehicle and a nearest non-motor vehicle based on a distance between the motor vehicle and the nearest non-motor vehicle comprises:
if the distance between the motor vehicle and the nearest non-motor vehicle is greater than or equal to the distance threshold value, determining that no collision occurs between the motor vehicle and the nearest non-motor vehicle;
and if the distance between the motor vehicle and the nearest non-motor vehicle is less than the distance threshold value, determining that the collision between the motor vehicle and the nearest non-motor vehicle will occur.
The distance threshold may be set based on the driving speed of the vehicle and the non-vehicle, and the like.
In one example, as shown in FIG. 5, V1 is the speed of the vehicle, V2 is the speed of the non-vehicle, and θ is the vehicle speed V1 squareAngle in the direction of non-motor vehicle speed V2. The speed V2 of the non-motor vehicle is longitudinally and transversely decomposed to obtain the transverse speed V2hV2 sin θ. Considering that the non-motor vehicle is close to the motor vehicle when running side by side, the non-motor vehicle lateral braking displacement is assumed to be zero. Reaction time t for non-motor vehicle driverdelayThe distance threshold value D between the motor vehicle and the non-motor vehicle is V2h*tdelay＝V2*sinθ*tdelay。
As an embodiment, after determining that a collision will occur between the vehicle and the nearest non-vehicle, further comprising:
the alarm is respectively given by a first alarm arranged in the motor vehicle and a second alarm arranged at a non-motor vehicle nearest to the motor vehicle.
Specifically, when D is larger than or equal to D, the alarms of the motor vehicle and the non-motor vehicle are not triggered; when D < D, the microcomputer can send out early warning signals to the voice alarm devices of the motor vehicle and the non-motor vehicle through the related fixed signal transmitter, and then the alarm devices of the motor vehicle and the non-motor vehicle are triggered, wherein the expressions can comprise: (1) alarm in a motor vehicle: you are too close to the non-motor vehicle on the right side and please pay attention to avoid. (2) Siren on non-motor vehicle: you are too close to the left motor vehicle and please pay attention to avoid.
In one example, the vehicle position coordinate determination process may be described with reference to FIG. 6, where a stationary signal receiver at traffic light A, B, C, D receives signals transmitted by signal transmitters located on both motor vehicles and non-motor vehicles in FIG. 6. Specifically, when the wireless signal transmitter at the front right turn signal lamp of the motor vehicle enters the service area, the fixed signal receiver at the traffic signal lamp A, B, C, D receives the signal transmitted by the wireless signal transmitter, and since the fixed signal receiver at the lamp post B is closest to the wireless signal transmitter at the front right turn signal lamp of the motor vehicle, the wireless signal receiver at the lamp post B transmits information to the microcomputer as soon as receiving the signal, and the microcomputer records the time t after receiving the information0And then received by a stationary signal receiver at the light post A, C, DAfter the number, it also transmits a signal to the microcomputer, and after receiving the information, the microcomputer records the time tAm1-0、tCm1-0、tDm1-0Then the distance d between the front right turn signal lamp and the lamp post A, C, D is obtained by the correlation calculation formulaAm1、dCm1、dDm1Then establishing a coordinate system in the computer by taking A as a center of a circle and dAm1A circle with radius, C as the center of the circle, dCm1Is a circle of radius and has D as the center of the circle, DDm1The three circles are circles with the radius, and the coordinates of the common intersection point of the three circles are obtained through solving the common intersection point of the three circles, so that the coordinates of the wireless signal transmitter at the front and right steering lamps of the motor vehicle are determined. The calculation of the coordinates of the rear right turn signal of the motor vehicle and the left handle bar and the rear left turn signal of the non-motor vehicle is similar to that described above.
The correlation calculation formula: (c is the speed of light in m/s; tAm1，tAm1-0，tCm1，tCm1-0，tDm1，tDm1-0，t0The unit is s; dAm1，dCm1，dDm1Unit is m)
The time when the wireless signal at the front right turn light of the motor vehicle is transmitted to the lamp post A: t is tAm1＝tAm1-0-t0
The distance between the front right turn signal lamp of the motor vehicle and the lamp post A is as follows: dAm1＝c*tAm1
The time for the wireless signal at the front right turn light of the motor vehicle to propagate to the lamppost C: t is tCm1＝tCm1-0-t0
The distance between the front right turn signal lamp of the motor vehicle and the lamp post C is as follows: dCm1＝c*tCm1
The wireless signal at the front right turn light of the motor vehicle is transmitted to the lamp post D time: t is tDm1＝tDm1-0-t0
Distance between the front right steering lamp of the motor vehicle and the lamp post D is as follows: dDm1＝c*tDm1。
In one example, a system for operating the above-described method for predicting a left-turn vehicle collision with a non-vehicle collision situation within an intersection may be disposed at the intersection shown in FIG. 7. The above-mentioned system includes: wireless signal transmitter (such as first signal transmitter, second signal transmitter), wireless signal receiver, miniature power transformer, microcomputer, pronunciation early warning device. The area surrounded by four traffic signal lamp posts at the intersection is used as a service area, the traffic signal lamp post A (shown in figure 7) is used as a reference point, the distance between B, C, D three lamp posts and the lamp post A is measured by a distance measuring tool, and then a plane coordinate system with the lamp post A as an origin is established in a microcomputer, so that each position in the service area can be represented by (x, y) in the coordinate system. Wireless signal transmitters (the signal frequency is set as a) are arranged at the front right steering lamp and the rear right steering lamp of a left-turning motor vehicle, a voice early warning device is arranged in the motor vehicle, and a power supply of the motor vehicle is used for supplying power to the wireless signal transmitters and the voice early warning device; a wireless signal transmitter (signal frequency is set as b) is arranged at a left handlebar and a rear left steering lamp of a left-turning non-motor vehicle, a voice early warning device is arranged on the head of the non-motor vehicle, and a power supply of the non-motor vehicle is utilized to supply power to the wireless signal transmitter and the voice early warning device. The traffic signal lamp posts A, B, C, D are respectively provided with a fixed signal receiver (capable of receiving signals with frequencies a and b), a microcomputer control A, B, C, D positioned at the lamp post A is provided with a fixed signal receiver and a fixed signal transmitter (the signal frequency is set as c), and 4 fixed signal receivers are used for receiving signals sent by wireless signal transmitters on left-turning motor vehicles and left-turning non-motor vehicles and transmitting early warning signals to a voice early warning device through the signal transmitters. The prediction method for the collision situation of the left-turn motor vehicle and the non-motor vehicle in the intersection is provided, which effectively avoids the collision situation of the left-turn motor vehicle and the non-motor vehicle in the intersection when the left-turn motor vehicle and the non-motor vehicle collide during running, aiming at the phenomenon that the current road intersection left-turn motor vehicle and the non-motor vehicle flow are prone to generate collision and further cause traffic accidents.
Specifically, the wireless signal transmitter and the wireless signal receiver adopt direct current, the working voltage is 12V, and the working radius can be 15M (meters). There are three types of signal emitters: one type of transmitting frequency a signal (a first signal transmitter used by a motor vehicle), one type of transmitting frequency b signal (a second signal transmitter used by a non-motor vehicle), and one type of transmitting frequency c signal (fixed wireless signal transmitter frequency). The fixed wireless signal transmitter/receiver is installed at the lamp post A together with the microcomputer, the fixed wireless signal receiver can receive the two different frequencies a and b, and the fixed wireless signal transmitter transmits a signal with the frequency of c to the wireless signal receivers on the motor vehicle and the non-motor vehicle. The switch of the wireless transmitter on the motor vehicle is a left turn light switch, namely the left turn light is turned on/off, and the wireless transmitter is turned on/off. The switch of the wireless transmitter on the non-motor vehicle is a left turn light switch, namely, the left turn light is turned on/off, and the wireless transmitter is turned on/off.
A micro power transformer: AC220V alternating current is converted into DC12V direct current, and 220V alternating current is used for supplying power to 4 fixed signal receivers/transmitters;
description of the non-motor vehicles not requiring the use of miniature power transformers: the power supply of the motor vehicle is 12V direct current, so that the wireless signal transmitter can be directly powered through the power supply; the power supply of the non-motor vehicle consists of a plurality of storage batteries, for example 48V storage batteries, which are formed by connecting 4 12V storage batteries in series, and the wireless signal transmitter can supply power to the non-motor vehicle through 1 12V storage battery.
The voice alarm device comprises: including wireless signal receiver and siren, wireless signal receiver receives the signal that comes from fixed wireless signal transmitter frequency c, and then the siren can start, and the expression form is: an alarm in a motor vehicle, namely 'you are too close to a non-motor vehicle on the right side, please notice to avoid'; an alarm on the non-motor vehicle, namely 'you are too close to the motor vehicle on the left side and please pay attention to avoiding'.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
It should be noted that the terms "first \ second \ third" referred to in the embodiments of the present application merely distinguish similar objects, and do not represent a specific ordering for the objects, and it should be understood that "first \ second \ third" may exchange a specific order or sequence when allowed. It should be understood that "first \ second \ third" distinct objects may be interchanged under appropriate circumstances such that the embodiments of the application described herein may be implemented in an order other than those illustrated or described herein.
The terms "comprising" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product, or device that comprises a list of steps or modules is not limited to the listed steps or modules but may alternatively include other steps or modules not listed or inherent to such process, method, product, or device.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (5)
1. A method for predicting the collision situation between a left-turning motor vehicle and a non-motor vehicle in a cross opening is characterized by comprising the following steps:
s10, when each motor vehicle turns on the left turn signal lamp to enter the service area, the plurality of first signal transmitters arranged at each motor vehicle respectively transmit first signals to the signal receiver, and the signal receiver transmits each first signal to the microcomputer; the first signal carries the number of the motor vehicle where the corresponding first signal transmitter is located;
s20, when each non-motor vehicle turns on the left turn signal lamp to enter the service area, the plurality of second signal transmitters arranged at each non-motor vehicle respectively transmit second signals to the signal receiver, and the signal receiver transmits each second signal to the microcomputer; the second signal carries the number of the non-motor vehicle where the corresponding second signal transmitter is located;
and S30, the microcomputer calculates first position coordinates of each motor vehicle according to each first signal corresponding to each motor vehicle, calculates second position coordinates of each non-motor vehicle according to each second signal corresponding to each non-motor vehicle, determines the non-motor vehicle closest to each motor vehicle according to each first position coordinate and each second position coordinate, and predicts whether collision will occur between each motor vehicle and the closest non-motor vehicle according to the distance between each motor vehicle and the closest non-motor vehicle.
2. The method of claim 1, wherein a first signal transmitter is provided at a front right turn signal light of the vehicle and a first signal transmitter is provided at a rear right turn signal light of the vehicle;
the microcomputer calculating the first position coordinates of each vehicle according to each first signal corresponding to each vehicle includes:
the microcomputer determines the current front right steering lamp position of the motor vehicle according to a first signal corresponding to a first signal transmitter at the front right steering lamp, determines the current rear right steering lamp position of the motor vehicle according to a first signal corresponding to a first signal transmitter at the rear right steering lamp, and determines the first position coordinate of the motor vehicle according to the front right steering lamp position and the rear right steering lamp position.
3. The method of claim 1, wherein a second signal transmitter is disposed at a left handle bar of the non-motor vehicle, and a second signal transmitter is disposed at a rear left turn light of the non-motor vehicle;
the microcomputer calculating the second position coordinates of each non-motor vehicle according to each second signal corresponding to each non-motor vehicle includes:
the microcomputer determines the current left handlebar position of the non-motor vehicle according to a second signal corresponding to a second signal transmitter at the left handlebar, determines the current rear left turn light position of the non-motor vehicle according to a second signal corresponding to a second signal transmitter at the rear left turn light, and determines the second position coordinate of the non-motor vehicle according to the left handlebar position and the rear left turn light position.
4. The method of predicting a collision between a left-turn motor vehicle and a non-motor vehicle in an intersection according to any one of claims 1 to 3, wherein predicting whether a collision between a motor vehicle and a nearest non-motor vehicle will occur based on a distance between the motor vehicle and the nearest non-motor vehicle comprises:
if the distance between the motor vehicle and the nearest non-motor vehicle is greater than or equal to the distance threshold value, determining that no collision occurs between the motor vehicle and the nearest non-motor vehicle;
and if the distance between the motor vehicle and the nearest non-motor vehicle is less than the distance threshold value, determining that the collision between the motor vehicle and the nearest non-motor vehicle will occur.
5. The method of predicting a left turn vehicle collision with a non-motor vehicle in an intersection of claim 4, further comprising, after determining that a collision will occur between the vehicle and the nearest non-motor vehicle:
the alarm is respectively given by a first alarm arranged in the motor vehicle and a second alarm arranged at a non-motor vehicle nearest to the motor vehicle.
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