CN212160450U

CN212160450U - STM 32-based vehicle intelligent safety driving control system

Info

Publication number: CN212160450U
Application number: CN202020735089.7U
Authority: CN
Inventors: 于天河; 柳梦瑶
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2020-05-07
Filing date: 2020-05-07
Publication date: 2020-12-15
Anticipated expiration: 2030-05-07

Abstract

The utility model relates to a vehicle intelligent security driving control system based on STM32 belongs to computer technology field. The purpose of this utility model design is exactly to remedy the not enough of current safe driving system, according to the main reason for enticing of analysis traffic accident, has used cell-phone software to pass through bluetooth control dolly. The implementation of the design includes both software and hardware. The hardware part adopts a modular design, adopts STM32 as a core control unit, and is attached with a data transmission module, a speed detection module, a liquid crystal display module and the like to construct the overall hardware architecture of the intelligent safe driving control system of the vehicle. The software part needs to be combined with the hardware architecture, the functions of the modules are realized by using c language in the Keil MDK, and further the design of the intelligent safe driving control system of the vehicle is realized. The utility model discloses mainly be applied to the intelligent vehicle control facility of public road.

Description

STM 32-based vehicle intelligent safety driving control system

Technical Field

The utility model particularly relates to a vehicle intelligent security driving control system based on STM32 belongs to computer technology field.

Background

The intelligent safe driving control system in China starts relatively late abroad, beginning at about 80 years of the 20 th century. At present, the domestic research result has a larger distance than other developed countries, and the demand for more excellent driving control and driving safety systems is increasingly urgent due to the increasing domestic first traffic load. The intelligent vehicle is called as an unmanned vehicle, and integrates a plurality of high and new technologies, sensor detection, electronic engineering, computer engineering, mechanical engineering, automatic control engineering, artificial intelligence and other multidisciplinary research results. The intelligent traffic can effectively improve traffic efficiency, reduce traffic jam, improve driving safety and reduce the incidence of automobile accidents. The intelligent safe driving control system of the vehicle applies an integrated, automatic and internet intelligent system formed by various technologies to further control the vehicle, not only can create a driving environment with high comfort and strong safety for a driver, but also can make the driving become more and more intelligent and humanized.

The conventional intelligent safe driving control system for the vehicle has great defects, and the intelligent system for the vehicle has the defects of incapability of ensuring safety, complex operation and difficulty in maintenance due to various types and different standards; when the intelligent driving control system is applied to actual life, the defects of high price, complex operation, single performance and the like are likely to exist, and further the intelligent safe driving system is difficult to popularize on a large scale.

SUMMERY OF THE UTILITY MODEL

In order to overcome the weak point of current vehicle safety driving system, the utility model provides an intelligent driving control system of security, intelligence, comprehensiveness. Compared with the prior art, the equipment effectively solves the following key problems: detecting longitudinal driving distance and driving speed in real time, calculating the minimum longitudinal safe driving distance in real time, and providing auxiliary safe driving information to a driver by integrating data calculation of various aspects through an STM 32; when the system foresees that dangerous hidden danger exists, the system sends out alarms to the front and back and the vehicle to remind the driver of driving carefully. The system can effectively reduce rear-end collision and rear-end collision in the driving process of the automobile, reduce traffic accidents and ensure safe driving of a driver. The utility model relates to a vehicle intelligent security driving control system technical scheme based on STM32 specifically as follows:

the design of the system mainly comprises the following aspects: STM32 major control module, ultrasonic ranging module, audio alert module, LCD display module, infrared speed measuring module, wireless transmission module, L298N motor drive, power module.

STM32 main control module STM32 in having chooseed meaning semiconductor for use has carried out the transmission between the data between each module and the STM32 main control module through transport protocol as CPU, for the convenience look over the data of transmission, make it show through the LCD display.

The vehicle speed detection module is mainly used for detecting the vehicle speed of the model trolley and providing data support for determining the longitudinal minimum inter-vehicle distance. In the speed measurement process, the influence of the stability of the running trolley on the speed of the vehicle is still large. The module controls the running speed of the trolley through a closed-loop feedback system, so that the influence of nonresistance factors on speed measurement can be reduced to a great extent, and the module also utilizes the infrared reflection type radio and television sensor to scan a corner code disc to achieve the purpose of measuring the running speed.

The ultrasonic ranging module is a module with the model number of HHC-SR04, sends ultrasonic waves to the periphery of an automobile through a transmitter, and the emitted ultrasonic waves are reflected when being spread to a distant place and touch a blocked object. Therefore, when an object blocking the movement of the automobile exists around the automobile, the object can be quickly identified by the system. When the ultrasonic ranging module is manufactured, the ultrasonic ranging module is fixed on the vehicle head, so that the displacement of the trolley from a front object can be accurately detected.

The data transmission module applies a Bluetooth wireless transmission technology and adopts a BLK-MD-HC-05 Bluetooth module. The intelligent model car safe driving system is an important link of the intelligent model car safe driving system, and the safe driving strategy of the intelligent model car is adjusted according to data sent by the STM 32.

The LCD display module adopts LM16032, and when the ultrasonic ranging module of car sends the ultrasonic wave through the transmitter, main control chip STM32 just starts the timing function. When the emitted ultrasonic waves encounter the blocking object and are reflected, the timing of the STM32 main control module is stopped after the receiver receives the reflection. And then the STM32 sends and receives data through the data transmission module by acquiring the speed obtained by the speed measurement module, calculates the current speed of the vehicle and the distance between the current time and the front vehicle, and displays the result on the LCD module.

The utility model has the advantages that:

an intelligent safe driving control system of a vehicle based on STM32 provides an intelligent driving assisting system with complete functions and high reliability. The system solves the problems of insufficient intellectualization, single function and complex operation of the current driving system, and is provided with perfect speed and distance acquisition functions. The data calculation of each aspect can be integrated to provide auxiliary safe driving information for the driver, so that the traffic efficiency can be effectively improved, the traffic jam can be reduced, the driving safety can be improved, the accident rate of automobiles can be reduced, and the safe driving of the driver can be further ensured.

Drawings

FIG. 1 is a block diagram of the overall system architecture;

FIG. 2 is a block diagram of a system power module;

FIG. 3 is a functional block diagram of the motor drive module of L298N;

FIG. 4 is a connection block diagram of a steering engine and an STM 32;

Detailed Description

The technical solution of the present invention is further described below with reference to the embodiments, but not limited thereto, and all modifications or equivalent replacements of the technical solution of the present invention may be made without departing from the spirit and scope of the technical solution of the present invention.

Example 1

An STM 32-based intelligent safe vehicle driving control system is mainly characterized in that a composition block diagram of a figure 1 mainly comprises an STM32 main control module (1-1), ultrasonic ranging modules (1-2 and 1-3), a voice alarm module (1-4), an LCD display module (1-5), an infrared speed measurement module (1-6), a wireless transmission module (1-7), a motor driving module (1-10) and a power supply module (1-11), which are communicated with an external sensor through various protocols and realize stable operation; the infrared speed measuring module (1-6) is responsible for detecting the running speed of an automobile, the ultrasonic distance measuring modules (1-2, 1-3) are responsible for measuring the distance from the automobile to the front automobile, then the data are respectively transmitted to the STM32 main control module (1-1), and meanwhile, a timer in the STM32 main control module (1-1) also records the time difference from the beginning of sending ultrasonic waves to the time when the ultrasonic waves are received; the STM32 main control module calculates a result and then transmits the data result to a voice alarm module (1-4) and an LCD display module (1-5), the voice alarm module (1-4) judges whether an alarm mechanism needs to be started according to the data transmitted by the STM32 main control module (1-1), and the LCD display module (1-5) displays the data transmitted by the STM32 main control module (1-1); the power supply modules (1-11) adopt lithium batteries with 12v voltage, so that the whole system can run stably. The STM32 main control module (1-1) is connected with the L298N motor driving module (1-10) and the wireless transmission module (1-7), and the STM32 main control module (1-1) judges whether to start the L298N motor driving module (1-10) or not to control the trolley to move; and the wireless transmission module (1-7) adopting the Bluetooth wireless transmission technology can perform data interaction with the STM32 main control module (1-1) under the condition of no network, so that the operability and the reliability are greatly improved.

Example 2

A power module structure diagram of a vehicle intelligent safety driving control system based on STM32 is shown in figure 2, and comprises a 12V lithium battery pack (2-1), an LM2940 voltage stabilizer (2-2), an LM1117 voltage stabilizer (2-3), a motor drive circuit (2-4), a steering engine circuit (2-5), a sensor (2-6), a peripheral circuit (2-7), an STM32I/O interface (2-8) and a direct current motor (2-9), wherein the power module provides initial power supply for system operation by using the 12V lithium battery pack (2-1), and converts the latest 12V voltage value through a voltage reduction technology; the 12V lithium battery pack (2-1) supplies voltage to the direct current motor (2-9), the positive and negative electrodes at the two ends of the 12V lithium battery pack (2-1) are respectively connected to the two power interfaces of the direct current motor (2-9), and the direct current motor (2-9) can normally operate; in order to supply power to peripheral circuits (2-7) of an STM32 main control module (1-1), a voltage value of 5V is required; the power supply of a 12V lithium battery pack (2-1) is subjected to voltage stabilization treatment by an LM2940 voltage stabilizer (2-2) to obtain a 5V power supply, and then the 5V power supply is connected to a peripheral circuit (2-7); the normal working voltage supplied by the STM32I/O interface (2-8) is 3.3V, and then the voltage is regulated by the LM1117 voltage regulator (2-3) on the basis of the 5V power supply obtained after the voltage is regulated by the LM2940 voltage regulator (2-2) to obtain a 3.3V power supply, and then the power supply is connected to the STM32I/O interface (2-8).

The motor driving module (1-10) is shown in figure 3, and the main method is as follows: VCC and GND in the module can be directly connected into motors (1-9, 1-8), and the driving chip provides +5V and GND ports which can be used as independent power input ports of the driving module (1-10). In order to prevent the motor driving modules (1-10) from influencing the operation of the STM32 main control module (1-1) when working, two armatures in the L289N motor driving module (1-10) are welded with a 104 capacitor to achieve the purpose of filtering; the STM32 main control chip (1-1) sends high and low points to PWMA and PWMB on the driving chip (1-10) to achieve the purpose of regulating and controlling the rotation of the motor.

Example 3

A steering engine module (2-5) of a vehicle intelligent safety driving control system based on STM32 is shown in fig. 4, and determines a connection mode with an STM32I/O interface (2-8) according to the type difference of the steering engine, wherein 3 configuration lines are led out from the steering engine (4-2): a signal line, a power line VCC and a ground line GND; in the execution process, the direct current bias voltage (4-2) in the steering engine module is detected and compared with the potentiometer voltage to obtain a difference value, and then the difference value is sent to the motor driving module (1-10), so that the purpose of adjusting the forward and reverse rotation functions of the motor can be achieved; the steering engine (4-2) can also realize corresponding regulation and control by utilizing PWM (pulse width modulation), and the duty ratio of the steering engine can be regulated, so that the corresponding running condition of the steering engine (4-2) can be regulated; in the system, an STM32 main control chip (1-1) can generate a PWM signal with the duty ratio adjustable between 0.5 millisecond and 2.5 milliseconds, which is shown in that a steering engine (4-2) can be adjusted along with adjustment; the used steering engine (4-2) is simply connected with the STM32(1-1), and the realizability is increased.

Claims

1. The utility model provides a vehicle intelligent security driving control system based on STM32, characterized by: including STM32 major control module (1-1), ultrasonic ranging module (1-2, 1-3), audio alert module (1-4), LCD display module (1-5), infrared module (1-6) that tests the speed, wireless transmission module (1-7), motor drive module (1-10), power module (1-11), STM32 major control module (1-1) external ultrasonic ranging module (1-2, 1-3), audio alert module (1-4), LCD display module (1-5), infrared module (1-6) that tests the speed, wireless transmission module (1-7), motor drive module (1-10), power module (1-11).

2. An STM 32-based intelligent safe driving control system for vehicles according to claim 1, wherein: the system comprises a 12V lithium battery pack (2-1), an LM2940 voltage stabilizer (2-2), an LM1117 voltage stabilizer (2-3), a motor driving circuit (2-4), a steering engine circuit (2-5), a sensor (2-6), a peripheral circuit (2-7), an STM32I/O interface (2-8) and a direct current motor (2-9), wherein the 12V lithium battery pack (2-1) is used as an initial power supply of the system, is connected with the supply voltage of the direct current motor (2-9), and respectively leads the positive and negative poles at the two ends of the 12V lithium battery pack (2-1) to the two power interfaces of the direct current motor (2-9); the power supply of the lithium battery pack (2-1) is subjected to voltage stabilization treatment by the LM2940 voltage stabilizer (2-2) and then is connected to the peripheral circuit (2-7); and the voltage stabilized by the LM2940 voltage stabilizer (2-2) is connected to an STM32I/O interface (2-8) after passing through the LM1117 voltage stabilizer (2-3).

3. An STM 32-based intelligent safe driving control system for vehicles according to claim 1, wherein: the steering engine (4-2) is connected with the STM32I/O interface (2-8).