CN111873901A

CN111873901A - Traffic accident front line warning system

Info

Publication number: CN111873901A
Application number: CN202010732965.5A
Authority: CN
Inventors: 陈彬豪
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2020-11-03

Abstract

The invention relates to a traffic accident front line warning system which comprises a mobile terminal and an intelligent trolley which are in communication connection, wherein the mobile terminal is used for receiving environmental parameters of an accident scene and calculating and displaying the placement distance of a triangular warning board; the intelligent trolley comprises a trolley body, and a single chip microcomputer, a triangular warning board, a communication module, a motor driving chip, a driving motor, a warning lamp and a buzzer which are arranged on the trolley body, wherein the single chip microcomputer is respectively connected with the communication module, the motor driving chip, the warning lamp and the buzzer, the warning lamp is arranged on the triangular warning board, and the motor driving chip is connected with the driving motor to realize the movement and stop of the intelligent trolley; the intelligent vehicle arrives at the designated position based on the triangular warning board placement distance under the remote control of the mobile terminal. Compared with the prior art, the invention can effectively reduce the incidence rate of secondary traffic accidents and protect the safety of lives and property.

Description

Traffic accident front line warning system

Technical Field

The invention relates to the technical field of road traffic safety, in particular to a traffic accident front line warning system.

Background

In various traffic accidents, part of the accidents are secondary accidents caused by improper operation after the traffic accidents of drivers, so that the occurrence probability of the existing traffic accidents is greatly increased.

In order to reduce the secondary accident, most of the traditional triangular warning boards in the market are passive reflectors made of plastic reflective materials, for example, the patent application CN109318798A discloses an expressway anti-collision triangular warning board connected with a vehicle network, and the triangular warning board is provided with the plastic reflective materials. However, in practical application, the traditional triangular warning board has certain defects, which are mainly shown as follows: the light can be emitted only when the light is irradiated, and the warning effect is poor when the visual field is poor under the condition of no light. The requirement on the use angle is high, the warning range is small, the warning effect on vehicles running from the front is good, and the warning effect on vehicles changing lanes on the side is poor.

In addition, the process of traditionally placing the triangular warning board is as follows: and (3) turning on a danger alarm lamp of the accident vehicle, carefully observing the coming vehicle at the rear, holding the triangular warning board in front of the chest, moving the triangular warning board to the rear of the accident lane to a specified distance, placing the triangular warning board, and finally evacuating the personnel. Because need personnel to hold the triangle warning sign, walk backward along the accident lane, if meet the rear that does not pay attention to the speed reduction and come the car, personnel hide and dodge untimely, cause secondary traffic accident easily.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a traffic accident front line warning system which can effectively improve the road safety.

The purpose of the invention can be realized by the following technical scheme:

a traffic accident front line warning system comprises a mobile terminal and an intelligent trolley which are in communication connection, wherein the mobile terminal is used for receiving accident site environment parameters and calculating and displaying the placement distance of a triangular warning board;

the intelligent trolley comprises a trolley body, and a single chip microcomputer, a triangular warning board, a communication module, a motor driving chip, a driving motor, a warning lamp and a buzzer which are arranged on the trolley body, wherein the single chip microcomputer is respectively connected with the communication module, the motor driving chip, the warning lamp and the buzzer, the warning lamp is arranged on the triangular warning board, and the motor driving chip is connected with the driving motor to realize the movement and stop of the intelligent trolley;

the intelligent vehicle arrives at the designated position based on the triangular warning board placement distance under the remote control of the mobile terminal.

Furthermore, the mobile terminal is provided with a human-computer interaction interface, and the human-computer interaction interface comprises an environment parameter input unit, a communication connection state display unit, a remote control unit and a placement distance display unit.

Further, the environment parameter input unit adopts a selection mode, a manual input mode or a real-time acquisition mode.

Further, the environmental parameters include road type, actual time, and weather view.

Further, the remote control unit is a directional remote control unit and/or a key control unit.

Furthermore, the singlechip is also connected with an ultrasonic ranging module, and when the ultrasonic ranging module detects that the distance between obstacles in front is less than a set threshold value, the warning modes of the alarm lamp and the buzzer are switched.

Further, the ultrasonic ranging module comprises an ultrasonic transmitter and an ultrasonic receiver.

Further, the warning mode comprises a conventional warning mode and an enhanced warning mode, and when the distance between the detected front obstacles is smaller than a set threshold value, the warning mode is switched from the conventional warning mode to the enhanced warning mode.

Further, under the reinforcing warning mode, the intelligent trolley automatically retreats.

Further, the normal warning mode is that the alarm lamp is normally on, and the buzzer takes time t₁Interval chirping;

the enhanced alert mode is defined as the time t₂Flashing alarm lights and sounding a buzzer at intervals, t₂<t₁。

Further, the communication module is an HC-05 Bluetooth chip.

Further, the singlechip is connected with a mobile charging power supply.

Further, the singlechip is Arduino Uno singlechip.

Further, the single chip microcomputer is connected with a key switch.

Furthermore, the single chip microcomputer is connected with a GPS module so as to conveniently realize one-key control.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention can display and guide based on the environmental parameters of the accident scene by holding the mobile terminal by hand, so that the triangular warning board is placed to a distance meeting the standard, and the road traffic safety is improved.

2. The triangular warning board is operated in a remote control mode to achieve the placement of the triangular warning board at the standard distance, people do not need to walk on the lane, the purpose that people leave the accident lane at the first time can be achieved, secondary accidents are avoided, and the safety is further improved.

3. The triangular warning board is internally provided with the warning lamp and the buzzer, so that the warning effect can be improved, and the triangular warning board can emit light and give out warning sound at night, thereby not only improving the warning effect visually, but also increasing the auditory warning effect and improving the safety.

4. The power-on warning mode is a conventional warning mode. When an obstacle which is not decelerated is detected, the reinforced warning mode is used, and the system automatically backs up until the distance of the obstacle detected by the ultrasonic sensor is greater than a threshold value, so that the conventional warning effect and remote control operation are recovered, and the active safety of the system is improved.

5. The invention can reduce the incidence of secondary traffic accidents and protect the safety of lives and properties.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic structural diagram of the intelligent trolley of the invention;

FIG. 3 is a main view of the smart car of the present invention;

FIG. 4 is a top view of the intelligent cart of the present invention;

FIG. 5 is a bottom view of the intelligent cart of the present invention;

FIG. 6 is a schematic diagram of the operation of the system of the present invention;

FIG. 7 is a schematic diagram of a man-machine interface of the mobile terminal;

in the figure, 1, a mobile terminal, 2, an intelligent trolley, 201, a single chip microcomputer, 202, an ultrasonic transmitter, 203, an ultrasonic receiver, 204, a key switch, 205, a motor driving chip, 206, a driving motor, 207, an alarm lamp, 208, a buzzer, 209, a triangular warning board, 210, a communication module, 211, a rubber wheel, 212, a universal wheel, 2071, an outer ring lamp, 2072, an inner ring lamp, 213 and a GPS module.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Example 1

As shown in fig. 1, the embodiment provides a traffic accident front line warning system, which includes a mobile terminal 1 and an intelligent car that are in communication connection. In the embodiment, the mobile terminal 1 is a smart phone loaded with an application program APP, so that a man-machine interaction function is realized, and the mobile terminal 1 is used for receiving the environmental parameters of an accident scene, calculating and displaying the placement distance of a triangular warning board; the intelligent car reaches the designated position under the remote control of the mobile terminal based on the placement distance of the triangular warning board, and realizes the functions of information acquisition, decision judgment, execution control and the like based on real-time acquired data, thereby playing the role of warning drivers of motor vehicles and non-motor vehicles or pedestrians.

After the accident happens, the driver turns on the danger alarm lamp of the accident vehicle, and all personnel on the vehicle can withdraw from the accident lane at the first time. The driver can remotely control the triangular warning board on the intelligent vehicle to the specified placement distance outside the street edge or lane, so that the occurrence of secondary accidents is avoided.

The mobile terminal 1 has a human-computer interaction interface, as shown in fig. 7, which includes an environment parameter input unit, a communication connection state display unit, a remote control unit, and a placement distance display unit, wherein the environment parameter input unit adopts a selection mode. In this embodiment, the environment parameters include a road type, an actual time, and a weather view, and specific options are shown in table 1.

Table 1 environmental parameter variables and options

And the mobile terminal calculates the standard placement distance of the triangular warning board according to the received options of different environment parameters. In this embodiment, only when all the 3 environmental parameters selected by the user are option 1, the triangular warning board displayed on the APP interface is placed at a distance "greater than 50 meters", and in all other cases, "greater than 150 meters" is displayed.

As shown in fig. 1-5, the intelligent car includes a car body, and a single chip 201, a triangular warning board 209, a communication module 210, a motor driving chip 205, a driving motor 206, a warning lamp 207 and a buzzer 208 which are arranged on the car body, wherein the single chip 201 is respectively connected with the communication module, the motor driving chip 205, the warning lamp 207 and the buzzer 208, the warning lamp 207 is installed on the triangular warning board, and the motor driving chip 205 is connected with the driving motor 206, so as to realize the movement and stop of the intelligent car. The single chip microcomputer is also connected with a key switch 204 for starting. The single chip 201, the motor driving chip 205, the communication module 210, the buzzer 208 and the like are integrated on a PCB expansion board.

In this embodiment, the automobile body of dolly body adopts the 3D printing mode to obtain.

In another embodiment, the single chip microcomputer is further connected with an ultrasonic ranging module, and when the ultrasonic ranging module detects that the distance between the front obstacles is smaller than a set threshold value, the warning modes of the alarm lamp and the buzzer are switched. The warning mode comprises a conventional warning mode and a strengthened warning mode, and when the distance between the detected front obstacles is smaller than a set threshold value, the warning mode is switched from the conventional warning mode to the strengthened warning mode. Further, under the enhancement warning mode, the intelligent vehicle automatically retreats. Wherein, the normal warning mode is that the alarm lamp is always on, and the buzzer takes time t₁Interval chirping; the enhanced alert mode is defined by the time t₂Flashing alarm lights at intervals and sounding a buzzer, t₂<t₁。

(1) Communication module

In this embodiment, the communication module uses an HC-05 bluetooth chip, and the bluetooth chip enables the single chip microcomputer to be used as a slave node to perform bluetooth communication with the mobile terminal host node. The important parameters of the HC-05 Bluetooth chip are as follows:

the effective communication distance of the open field is 10 meters;

secondly, the paired serial ports can be used as full-duplex serial ports;

thirdly, supporting standard baud rate between 4800bps and 1382400 bps;

the pins comprise VCC, GND, TXD, RXD, KEY and STATE, when the device is used, the VCC is connected with 5V, the GND is grounded, and the TXD and the RXD are respectively connected with the serial ports RXD and TXD of the single chip microcomputer.

(2) Ultrasonic ranging module

The ultrasonic ranging module of the embodiment adopts an HC-SR04 ultrasonic ranging module, which includes an ultrasonic transmitter 202 and an ultrasonic receiver 203, and is further connected with a control circuit. The module will automatically send 8 square waves of 40kHz and automatically detect if a signal is returned. If a signal returns, a high level is output through IO ECHO, the duration time of the high level is the time from the emission to the return of the ultrasonic wave, and the distance measurement calculation formula is as follows:

distance (high level time × sound velocity)/2

In the formula, the sound velocity is 340 m/s.

Load on triangle warning sign intelligent vehicle, connect the singlechip, detect non-motor vehicle or pedestrian's distance, important parameter is as follows:

firstly, ranging range: 2 cm-4 m;

measuring precision: 2 mm;

the distance measurement period is more than 60 milliseconds, so that the influence of the transmitted signal on the echo signal is prevented;

pins comprise VCC, TRIG, ECHO and GND, when the single-chip microcomputer is used, the VCC is connected with 5V, the GND is grounded, and the TRIG and the ECHO are respectively connected with a digital output pin and a digital input pin of the single-chip microcomputer.

(3) Motor driving chip

The motor driving chip of the embodiment adopts TB6612FNG, outputs and drives the left and right wheel motors, and has the following important parameters:

firstly, the logic power supply VCC range is 2.7V-5.5V of direct current;

the maximum value of the power supply VM of the motor is direct current 15V;

thirdly, the rated current is 1.2A, the peak current is 3.2A, and the heating is not easy to occur in the rated range;

and fourthly, double driving is realized, two motors can be driven respectively, and a driving truth table is shown in a table 2.

TABLE 2 TB6612FNG Motor drive chip logic truth table

The chip has 16 pins, when in use, VM and VCC are connected with 5V, GND is grounded, A1 and A2 are connected with one path of direct current motor, B1 and B2 are connected with the other path of direct current motor, PWMA and PWMB are connected with a singlechip PWM output pin, STBY, AIN1, AIN2, BIN1 and BIN2 are connected with a singlechip digital output pin.

(4) Driving motor

The left and right wheels of the trolley body are driven by a left and right driving motor. The driving motor of this embodiment adopts TT direct current gear motor, receives the signal from the motor drive chip, and the output drives left and right wheels.

(5) Other modules

The cart body includes rubber wheels 211 and universal wheels 212 for driving and steering.

The intelligent trolley is provided with a connecting wire and a connector, and the interval of XH2.54-2P 2.54mm is effective in preventing reverse connection.

In this embodiment, the warning light includes outer lane lamp 2071 and inner circle lamp 2072, and the outer lane lamp is LED lamp strip, installs on three limits of triangle warning sign.

The singlechip is connected with a mobile charging power supply and supplies power to the whole system. In this embodiment, mobile charging source adopts the treasured that charges, and specific parameter is: lithium battery, 5000mAh, 5V direct current output and 109.5 g. Remove the support frame dolly automobile body that charging source accessible 3D printed.

(6) Single chip microcomputer

Considering performance, cost and development mode comprehensively, the single chip microcomputer of the embodiment is an Arduino Uno single chip microcomputer, the processor core of the single chip microcomputer is Atmel Atmega328p, and the single chip microcomputer has 14 paths of digital input/output, wherein 6 paths of digital input/output can be used as PWM output, 6 paths of analog input, 2 paths of UART interfaces, a 16MHz crystal oscillator, a USB interface (which is convenient for on-line program debugging and power supply), a power jack, an ICSP header and a reset button.

The resource allocation interfaces of each interface of the singlechip and other hardware are shown in table 3.

TABLE 3 resource allocation interface definition table for all hardware model selection modules

As shown in fig. 6, the operation process of the traffic accident front line warning system is described as follows:

the working process of the mobile terminal (mobile phone APP terminal) comprises the following steps:

calculating the standard placement distance of the triangular warning board according to the environmental parameters of the accident scene set by the user;

then, Bluetooth pairing is carried out on the mobile phone APP and the intelligent car with the triangular warning board, and the pairing is tried again when the pairing fails until the pairing is successful; after the pairing is successful, the user can remotely control the intelligent car to move forwards, backwards, turn left, turn right and stop by using the mobile phone APP, as shown in fig. 7;

and when the intelligent car end carrying the triangular warning board runs to the standard distance, stopping the whole process.

The working process of the intelligent trolley comprises the following steps:

firstly, a key starts the intelligent trolley, an IO port is initialized, and input and output are set;

because the direct current motors always have small difference in the processing and manufacturing processes, compensation correction is carried out on the left motor and the right motor, and the compensation value is determined through debugging, so that the trolley can move along a straight line when the left wheel and the right wheel input the same PWM;

then, as a Bluetooth slave node, when the mobile phone APP terminal initiates a pairing request, the intelligent vehicle terminal attempts pairing, and if the pairing fails, the pairing needs to be initiated again until the pairing is successful;

the conventional warning mode is turned on, and in this embodiment, the conventional warning effect is: the alarm lamp is normally on, and the buzzer buzzes at intervals of 1 second;

after the pairing is successful, if the intelligent trolley receives a remote control command of the mobile phone APP, the left and right wheel motors are controlled to act according to the table 4, and the remote control command is completed; and if the intelligent trolley does not receive the remote control command of the mobile phone APP, controlling the intelligent trolley to stop in situ to wait for receiving the remote control command. The logic truth table of the motor driving chip in the table 2 and the interface definition table in the table 3 are combined, so that the remote control command can be converted into the output of Arduino;

TABLE 4 remote control Cart Command resolution

In the process of controlling the intelligent trolley to move, if the distance between the ultrasonic sensor and the front obstacle (generally, a non-motor vehicle or a pedestrian) is too short and is smaller than a set threshold value, an automatic driving takeover procedure is executed, the trolley retreats, and the warning effect is enhanced in the embodiment: the alarm lamp is changed from normal lighting to 500-second interval flashing, the buzzer is changed from 1-second interval sounding to 500-second interval sounding, and the conventional warning effect and the remote control operation are recovered until the ultrasonic sensor detects that the distance between the obstacles is larger than the threshold value;

Example 2

The embodiment provides a traffic accident front line warning system.A manual input mode is adopted by an environment parameter input unit in a human-computer interaction interface of a mobile terminal. The rest is the same as example 1.

Example 3

In the human-computer interaction interface of the mobile terminal, the environmental parameter input unit adopts a real-time acquisition mode, that is, the mobile terminal directly acquires information such as current weather, time, road type and the like based on the position of the mobile terminal, and calculates to obtain the standard placement distance of the triangular warning board. The rest is the same as example 1.

Example 4

The embodiment provides a traffic accident front line warning system, and in mobile terminal's human-computer interaction interface, the remote control unit still included a key control unit, is provided with the GPS module on the intelligent vehicle, and mobile terminal steerable intelligent vehicle key autopilot is to the target distance to key when retrieving and retrieve. The rest is the same as example 1.

Example 5

The embodiment provides a traffic accident front line warning system, is provided with the GPS module on the intelligent vehicle, and the steerable intelligent vehicle of mobile terminal is retrieved a key. The rest is the same as example 1.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims

1. A traffic accident front line warning system is characterized by comprising a mobile terminal and an intelligent trolley which are in communication connection, wherein the mobile terminal is used for receiving accident site environment parameters and calculating and displaying the placement distance of a triangular warning board;

2. The warning system of the traffic accident front line according to claim 1, wherein the mobile terminal has a human-machine interaction interface including an environmental parameter input unit, a communication connection state display unit, a remote control unit, and a placement distance display unit.

3. The warning system of the preceding claim 1 or 2, wherein the environmental parameters include road type, actual time and weather field.

4. The warning system of the front line of traffic accident according to claim 1, characterized in that the single chip microcomputer is further connected with an ultrasonic ranging module, and the ultrasonic ranging module switches the warning modes of the alarm lamp and the buzzer when detecting that the distance between the front obstacles is smaller than a set threshold value.

5. The pre-accident line warning system of claim 4, wherein the ultrasonic ranging module comprises an ultrasonic transmitter and an ultrasonic receiver.

6. The system of claim 4, wherein the alert mode comprises a normal alert mode and a reinforcement alert mode, and the alert mode is switched from the normal alert mode to the reinforcement alert mode when the distance between the obstacles in front is detected to be less than a predetermined threshold.

7. The warning system of the preceding line of traffic accident according to claim 6, wherein in the enhanced warning mode, the smart car is automatically retracted.

8. The warning system of claim 6 wherein the normal warning mode is a normal light and a buzzer for a time t₁Interval chirping;

9. The warning system of the preceding line of traffic accident according to claim 1, wherein the communication module is a HC-05 bluetooth chip.

10. The warning system of the preceding line of traffic accident according to claim 1, wherein the single chip microcomputer is connected with a mobile charging power supply.