CN211479292U - Emergency turn bend early warning device that comes - Google Patents
Emergency turn bend early warning device that comes Download PDFInfo
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- CN211479292U CN211479292U CN201922256219.9U CN201922256219U CN211479292U CN 211479292 U CN211479292 U CN 211479292U CN 201922256219 U CN201922256219 U CN 201922256219U CN 211479292 U CN211479292 U CN 211479292U
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Abstract
The utility model relates to a sharp turn bend early warning device that comes, including bend and early warning system, the bend includes bend first end, bend department and bend second end that arrange along the way, and early warning system includes control module, warning module, response module and power module, and control module divides two routes to be connected with warning module and response module respectively, and warning module is connected with response module, and power module divides three routes to be connected with control module, warning module and response module respectively; the control module comprises a single chip microcomputer and a driving circuit, the warning module comprises an indicator light, the two outer sides of the bend are respectively provided with the indicator light, the sensing module comprises a photoelectric sensor, and the first end of the bend and the second end of the bend are respectively provided with the photoelectric sensor. The utility model discloses sharp turn bend early warning device that comes, simple structure, simple to operate, the scope of action that can effectively solve existence among the prior art (convex lens) is limited, all-weather adaptability is not strong and easily leads to the problem of traffic accident and traffic congestion.
Description
Technical Field
The utility model relates to a bend meeting early warning technical field, concretely relates to sharp bend early warning device that comes a car.
Background
With the increasing number of private vehicles and the emphasis of the country on traffic safety, people have more and more urgent needs for effective measures capable of improving driving safety. At present, sharp turn curve accidents frequently occur, the sight of a driver is often blocked due to a large barrier, most of curves are only provided with a convex lens at present, the action range of the convex lens is limited, all-weather adaptability is not strong, the function of the convex lens is limited, and traffic accidents or traffic jam are easily caused, particularly, the sharp turn road in mountainous areas, the right-angled road in residential districts and other roads with large turning radian. Therefore, it is necessary to design a new technical solution to comprehensively solve the problems in the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a sharp turn bend early warning device that comes, the scope of action that can effectively solve existence among the prior art (convex lens) is limited, all-weather adaptability is not strong and easily leads to the problem of traffic accident and traffic jam.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a sharp turn curve coming warning device comprises a curve and a warning system, wherein the curve comprises a first end of the curve, a curve position and a second end of the curve which are arranged along the same direction, the warning system comprises a control module, a warning module, a sensing module and a power supply module, the control module is divided into two paths to be respectively connected with the warning module and the sensing module, the warning module is connected with the sensing module, and the power supply module is divided into three paths to be respectively connected with the control module, the warning module and the sensing module; control module includes singlechip and drive circuit, warning module includes the pilot lamp, two outsides of bend department are provided with respectively the pilot lamp, response module includes photoelectric sensor, bend first end and bend second end are equallyd divide and are do not had photoelectric sensor, power module includes solar module, solar control ware and battery.
The photoelectric sensor is a correlation photoelectric sensor, and two sets of correlation photoelectric sensors are respectively arranged at the first end of the curve and the second end of the curve.
The further scheme is that two groups of correlation type photoelectric sensors are respectively arranged at two sides of the bend along the length direction of the bend; the distance between the two groups of the correlation type photoelectric sensors is determined according to the longest vehicle length which can be passed through by the curve.
According to a further scheme, the indicating lamp is arranged in the direction of the coming vehicle on the curve, and comprises a red lamp, a green lamp and a yellow lamp.
According to the sharp curve coming vehicle early warning device provided by the technical scheme, the purposes of pre-judging and warning different coming vehicle conditions are achieved through the combined action of the control module, the sensing module and the warning module, and the judgment problem of the coming vehicle direction and the large and small vehicles is solved by utilizing the characteristics of single triggering, multiple triggering and continuous triggering of the photoelectric sensor; the solar power supply system is adopted for supplying power, so that the independence is strong, and the installation is simple and convenient; the utility model provides a sharp turn bend early warning device that comes a car low cost, simple to operate can increase mountain area road sharp turn bend factor of safety, improves the current efficiency of scenic spot peak time special road section road, solves the problem that the big road conditions of narrow turn radian easily lead to the traffic congestion.
Drawings
Fig. 1 is a schematic structural view of the sharp curve approach early warning device of the present invention;
fig. 2 is the circuit schematic diagram of the sharp turn curve coming car early warning device system.
In the figure: 1. a first end of the bend; 2. a warning module; 3. a control module; 4. a power supply module; 5. a bend part; 6. a sensing module; 7. a second end of the bend.
Detailed Description
In order to make the objects and advantages of the present invention more apparent, the present invention will be described in detail with reference to the following embodiments. It is to be understood that the following text is only intended to describe one or several particular embodiments of the invention, and does not strictly limit the scope of the claims specifically claimed.
The technical scheme of the utility model is as shown in fig. 1, fig. 2, a sharp turn bend early warning device that comes, including bend and early warning system, the bend includes bend first end 1, bend department 5 and bend second end 7 that arrange along the way, the early warning system includes control module 3, warning module 2, response module 6 and power module 4, control module 3 divides two routes to be connected with warning module 2 and response module 6 respectively, warning module 2 is connected with response module 6, power module 4 divides three routes to be connected with control module 3, warning module 2 and response module 6 respectively; the control module 3 comprises an STC89C51 single chip microcomputer and a driving circuit, the warning module 2 comprises indicator lamps, the indicator lamps are respectively arranged on two outer sides of the bend 5, the induction module 6 comprises photoelectric sensors, the photoelectric sensors are respectively arranged at the first end 1 and the second end 7 of the bend, and the power supply module 4 comprises a solar battery assembly, a solar controller (rated voltage: 12-24V; rated current: 30A; voltage: 50V; input power: 390W (12V)) and a storage battery.
The photoelectric sensors are opposite-type photoelectric sensors, two groups of opposite-type photoelectric sensors (U: 6-36 VDC; I: 200 Ma; Sn: 20m) are respectively arranged at the first end of the curve and the second end of the curve, and the opposite-type photoelectric sensors are adopted because laser has the advantages of high directivity, high brightness and the like, so that the response is sensitive, the response time is short, the structure is simple, the reliability is high, the opposite-type photoelectric sensors are particularly suitable for a field environment, and the stability and the safety of traffic guidance can be ensured; the two groups of correlation type photoelectric sensors are respectively arranged on two sides of the curve along the length direction of the curve, and the distance between the two groups of correlation type photoelectric sensors is determined according to the longest vehicle length which can be allowed to pass through the curve.
The driving sight distance is the distance of visibility of the driver during driving. In order to ensure driving safety, a driver can see obstacles on a road at a certain distance ahead or oncoming vehicles at any time so as to brake or bypass the vehicle in time. The necessary safe distance for the car to travel along the road surface during this time is the driving sight distance. The necessary driving sight distance is ensured on the plane or the vertical section of the road.
Calculation of driving sight distance
The driving sight distance is divided into three types, namely a parking sight distance, a meeting sight distance and a passing sight distance according to different visibility requirements.
1. Visual range for parking
When the automobile runs on a single lane or a double lane with an obvious separation belt, if the front of the automobile meets an obstacle or a road surface damage part and cannot run into an adjacent lane to bypass the part, the automobile is stopped completely in front of the obstacle by adopting a mode of braking the automobile so as to ensure the safety. Therefore, when the driver finds an obstacle ahead, the driver takes braking action immediately to the shortest distance required for the vehicle to safely stop in front of the obstacle, called the parking range.
The parking apparent distance S (in m) is composed of three parts, i.e.
Sr＝St+SZ+S0
In the formula: stThe distance traveled in the reaction time of the driver.
SZThe distance the driver starts braking to travel when fully stopped, i.e., "braking distance".
S0The automobile is a safe distance to ensure that the automobile has a certain safe distance and stops in front of the obstacle without rushing to the obstacle.
The automobile driver reaction time comprises reaction judgment time after finding the obstacle and time for the brake to take effect. The former time is related to the alertness of the driver and the color, size and the like of the barrier; the latter time is the time from the beginning of braking until the brake shoes completely lock the wheel, so that the wheel is in a sliding state. Currently, the judgment time specified in China is 1.2 s. The distance the vehicle travels during this time is
Braking distance SZThe calculation formula thereof may be expressed as a value depending on the magnitude of the braking force and the vehicle speed
In the formula: v is the calculated driving speed;
k is a braking coefficient and is generally between 1.2 and 1.4;
i is the longitudinal gradient of the road section, the ascending slope is positive, and the descending slope is negative.
From the above, the calculation formula of the parking sight distance is
2. Sight distance for meeting vehicles
The vehicle-meeting sight distance is the distance which is necessary for two vehicles running in opposite directions to brake on the same lane in time. Vehicle meeting sight distance SH(unit is m) consists of three parts:
firstly, the distance traveled by the automobile is within the reaction time and the brake effective time of the drivers of the two parties;
the braking distance of the two automobiles;
and thirdly, a safe distance.
If with V1And V2Indicating the speed of cars 1 and 2, and they are at i1And i2When driving on a longitudinal slope, there are
As can be seen from the above calculation, this distance is approximately twice the parking apparent distance.
3. Overtaking apparent distance
The sight distance necessary for the automobile to overtake the front automobile during running is called overtaking sight distance. The overtaking apparent distance is suitable for a two-lane road, and the whole overtaking apparent distance can be divided into the following four stages:
acceleration of driving distance
When the passing car following behind the slow car is judged to have the possibility of passing, the accelerated running moves to the opposite lane, and the running distance S before entering the lane is1(unit is m) is
In the formula V0The speed of the car to be overtaken is generally considered to be 10-20 km/h lower than the designed speed;
t1for acceleration time (seconds), t is the general case of the measured data1＝2.9～4.5；
a is the average acceleration, m/s2。
② distance S of overtaking car driving on opposite lane2(unit is m) is
In the formula: v is the speed of the overtaking automobile, and the overtaking automobile generally runs for km/h according to the designed speed;
t2for the time (seconds) of travel on the oncoming traffic lane, typically at t2＝9.3～10.4s。
③ safe distance S between overtaking automobile and opposite automobile when overtaking is finished3，S3＝15～60m。
④ overtaking automobile, the running distance S of the opposite automobile is within the time from the start of acceleration to the completion of overtaking4(unit is m) is
SC＝S1+S2+S3+S4
Considering S3The value is large, the requirement is not easy to meet, and the actual driving is safe only by considering the driving time of the overtaking automobile from the time when the overtaking automobile completely enters the opposite lane to the time when the overtaking is finished. After overtaking a car on the opposite lane, once the driver finds that the opposite coming car is short of distance, the driver can return to the original lane. Taking t as the time for general automobiles to catch up the front automobile from the opposite lane1And/3, then the time from this time on to the completion of the overtaking is t2/3, so that the minimum necessary overtaking visual range S3Is composed of
The safety sight distance theory is adopted, the speed of the coming vehicle is measured through the photoelectric sensor, the processor processes data, whether the speed of the two vehicles meets the safety sight distance requirement or not is compared, and if the speed of the two vehicles meets the safety sight distance requirement, the two vehicles can pass through safely. And transmitting the processed data to an electronic liquid crystal display screen to display the coming speed and the result of whether the data can safely pass through the electronic liquid crystal display screen, and reporting the result to a driver through voice broadcasting.
Determination of the longest vehicle length permitted for a curve to pass
When driving a curve, the minimum turning radius of the curve determines whether the vehicle can safely drive through the curve.
1. Influence of minimum turning radius on travelling
When the automobile turns, the minimum distance between the steering center and the track of the steering wheel at the outer side of the automobile (sometimes referred to as the outer edge of the front fender) is the minimum turning radius. The minimum turning radius represents the ability of the vehicle to pass through narrow curved terrain or to circumvent obstacles. The smaller the turning radius, the better the maneuverability of the vehicle.
The minimum turning radius is determined by the wheelbase of the vehicle in order to ensure that the wheels roll purely without slipping during steering. The long wheelbase has large turning radius, but the long wheelbase has better vehicle running smoothness.
2. Calculation of minimum turning radius
Calculating the outer wheel center wheel track of the steering wheel:
minimum turning radius calculated at the outermost point of the vehicle body:
in the formula: r0The minimum turning radius of the center wheel trace of the outer wheel of the steering wheel;
r is the minimum turning radius of the outermost point of the vehicle body;
l is the wheelbase;
θmaxthe maximum rotation angle of an outer wheel of the steering wheel;
b is a front wheel track;
c is the front overhang length;
k is the width of the whole vehicle;
m is the center distance of the main pin;
the minimum turning radius and body length of some common vehicles are listed below:
generally, the minimum turning radius of the road section is measured, the corresponding maximum vehicle length can be found through table query, and the distance set by the sensor of the road section can be determined after the maximum vehicle length is determined. Since the programmed trigger time is set based on the maximum vehicle length that the curve assist will allow to pass, the sensor interval is generally comparable to the maximum vehicle length.
More specifically, the indicating lamp is arranged in the coming direction of the curve, and comprises a red lamp, a green lamp and a yellow lamp; during specific implementation, the STC89C51 single chip microcomputer program can be set according to road conditions, and the following situations are explained in this embodiment, wherein the indicator light is an LED red-green indicator light (AC-DC 12V):
(1) the green light is normally on, so that the situation that a sharp curve is formed in front of a far-coming vehicle and no coming vehicle is in opposite direction is prompted, the vehicle can be correspondingly decelerated but can pass through the curve more quickly, and the one-way passing efficiency of the road is improved;
(2) judging the direction of the coming vehicle: two groups of correlation photoelectric sensors are adopted by each direction sensor, and only when the vehicles sequentially pass through the STC89C51 single-chip microcomputer according to a set sequence can an instruction be sent, so that misjudgment caused by vehicles in the same direction is avoided;
(3) judging the small motor vehicle: the length of the small car is short, the light blocking time cannot reach the light blocking time of the large car, the first sensor (the pair of reflective photoelectric sensors far away from the indicator light) is triggered, the triggering time does not reach the time set by the large car, the second sensor (the pair of reflective photoelectric sensors close to the indicator light) is triggered again to judge that the small car is a vehicle, at the moment, the green light is turned off, the red light flickers for 5 seconds, the driver is prompted to turn to the coming car, and the driver reduces the speed of the car to the safe wrong car range;
(4) judging the large motor vehicle: due to the characteristics of long vehicle length and long light blocking time, the situation that the second sensor (the pair of the emission type photoelectric sensors close to the indicator lamp) is triggered after the first sensor (the pair of the emission type photoelectric sensors far away from the indicator lamp) is continuously triggered for more than 1.5 seconds is set as the large vehicle, and the continuous sensing judgment can prevent two closely following small vehicles from being mistakenly judged as the large vehicle. When the green light is turned off and the red light is normally turned on for 5 seconds under the condition of the large vehicle, the driver is prompted to stop the vehicle close to the side to give the large vehicle a lane to prevent the situation that the large vehicle is difficult to advance and retreat to cause traffic jam;
(5) the method comprises the following steps of (1) processing the conditions of multiple vehicles and wrong vehicles: when a vehicle is in a wrong vehicle position, the correlation type photoelectric sensors can be triggered four times in sequence, the triggering sequence is 1221, 2112, 2121, 1212 and other conditions, the correlation type photoelectric sensors can be triggered in sequence of 1 and 2, and the device can give correct early warning;
(6) and (3) processing the situation after the cart passes: when a large vehicle passes through the opposite direction opposite emission type photoelectric sensor, namely when the large vehicle exits from a curve, considering that the opposite direction can accumulate stagnation, the opposite direction lane indicating lamp is set to flash for 5 seconds to prompt the coming vehicle to decelerate;
and (4) supplementary notes: wherein the cart determination procedure takes precedence over the cart determination procedure.
The utility model discloses sharp turn bend early warning device that comes, simple structure, low cost can effectively reduce the traffic accident on the sharp turn road, improves the vehicle on sharp turn road greatly and passes through efficiency, avoids the traffic jam phenomenon because of the big car turns and produces.
The above detailed description of the embodiments of the present invention has been provided with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and those skilled in the art can make several equivalent transformations and substitutions without departing from the principles of the present invention after learning the contents of the present invention.
Claims (4)
1. The utility model provides a sharp turn bend early warning device that comes, includes bend and early warning system, the bend is including extending the first end of bend (1), bend department (5) and the bend second end (7) of arranging, its characterized in that: the early warning system comprises a control module (3), a warning module (2), a sensing module (6) and a power supply module (4), wherein the control module (3) is divided into two paths to be respectively connected with the warning module (2) and the sensing module (6), the warning module (2) is connected with the sensing module (6), and the power supply module is divided into three paths to be respectively connected with the control module (3), the warning module (2) and the sensing module (6); control module (3) includes singlechip and drive circuit, warning module (2) includes the pilot lamp, two outsides of bend department (5) are provided with respectively the pilot lamp, the response module includes photoelectric sensor, bend first end (1) and bend second end (7) are equallyd divide and are do not had photoelectric sensor, power module includes solar module, solar control ware and battery.
2. The sharp curve coming warning device according to claim 1, characterized in that: photoelectric sensor is correlation type photoelectric sensor, bend first end (1) and bend second end (7) are equallyd divide and are provided with two sets of correlation type photoelectric sensor respectively.
3. The sharp curve coming warning device according to claim 2, characterized in that: the two groups of correlation type photoelectric sensors are respectively arranged on two sides of the bend along the length direction of the bend.
4. The sharp curve coming warning device according to claim 1 or 3, characterized in that: the pilot lamp sets up the direction of coming at the bend, and the pilot lamp includes red light, green light and yellow light.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113291286A (en) * | 2021-05-20 | 2021-08-24 | 东风汽车集团股份有限公司 | Auxiliary driving system based on curve yaw stability and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113291286A (en) * | 2021-05-20 | 2021-08-24 | 东风汽车集团股份有限公司 | Auxiliary driving system based on curve yaw stability and control method thereof |
| CN113291286B (en) * | 2021-05-20 | 2022-08-30 | 东风汽车集团股份有限公司 | Auxiliary driving system based on curve yaw stability and control method thereof |
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