CN115249404A - A fast-response real-time location and early warning system for truck collision accidents - Google Patents

Abstract

The invention discloses a quick-response real-time positioning and early warning system for a truck collision accident, which comprises a front-end detection unit arranged on the roof of a truck, a micro-control unit and a positioning transmission unit, wherein the micro-control unit and the positioning transmission unit are arranged in a truck carriage; the front end detection unit comprises an electronic collision sensor and an ultrasonic distance measurement sensor; the positioning transmission unit comprises a GPS and a communication module, and the electronic collision sensor and the ultrasonic ranging sensor are electrically connected with the micro control unit; the micro control unit is electrically connected with the GPS and the communication module. The system adopts a double detection mode, simultaneously adopts a collision sensor and an ultrasonic ranging sensor to carry out detection, and can alarm as long as one outgoing level signal exists; meanwhile, the alarm can be given in real time, and as long as the truck has a collision accident, the staff can immediately obtain the information of the traffic accident occurrence place in a short time, so that convenience is provided for subsequent rescue measures.

Description

A fast-response real-time location and early warning system for truck collision accidents

technical field

The invention relates to the field of truck safety, in particular to a rapid-response real-time location and early warning system for truck collision accidents.

Background technique

In recent years, traffic accidents have occurred frequently in our country. After the traffic accident occurs, if it is not handled in time, it will cause serious traffic jams and affect the normal operation of the entire traffic conditions, especially the accidents that occur on the highway. It is difficult to detect and deal with traffic accidents in time. On the one hand, the nature of the expressway limits the handling of traffic accidents, and on the other hand, it is affected by factors such as geographical weather, such as the distance on the expressway. Tunnels in mountains and mountains with far people are far away from places that can be monitored. In particular, traffic accidents on important traffic routes and high accident-incidence areas need to be dealt with in a timely manner. According to the data released by the Traffic Management Bureau of the Ministry of Public Security in the first half of 2020, reports are received every 20 kilometers on expressways and every 10 kilometers on national and provincial roads. According to the statistics of accidents, in the first half of 2020, 80 people were killed in 10 major road sections where accidents occurred frequently, and 7 of them were located in some sections of expressways such as G5 Jingkun Expressway and G15 Shenhai Expressway. The most serious traffic accident. Only in 2014, among many traffic accidents, the number of rear-end collisions accounted for 40% of all traffic accidents, and the casualties caused by rear-end collisions accounted for 60% of the total number of casualties. Therefore, the development of a timely positioning and alarm device for truck collision accidents is of great significance to the timely disposal of traffic accidents in our country and the later smoothing of traffic road conditions.

The collision accidents of trucks during driving can be mainly divided into front punching collisions and rear rear-end collisions. These two types of collisions cause the largest amount of injuries and are also the main application scope of the device. In the rear rear-end collision, the crash accident of the car is the most serious, and there are still many problems in the rear and lower protection devices of the trucks in our country: the design defects or installation errors of the rear and lower protection devices of the trucks cannot be well adjusted. The rear-end collision car plays a protective role and causes personal injury accidents; the rigidity of the protective device is not up to standard and the self-modification phenomenon is serious. After the rear and lower protective device of some trucks are damaged, the rear and lower protective device are welded by themselves, but the rigidity cannot meet the legal requirements; some trucks Even for the convenience of loading and unloading, it is not uncommon for the rear lower protective device to be installed, and the protective device to be in name only is not uncommon, which does not meet the requirements of my country's "Car and Trailer Side and Rear Lower Protection Requirements" GB11567.2-2017.

At present, the most common rear lower protection devices of trucks in my country are straight arm rear lower protection devices and inclined arm rear lower protection devices, but due to their low energy absorption and buffering capacity, they cannot achieve a good protective effect. Moreover, the distance of the chassis of large and medium-sized trucks from the ground is usually higher than that of the passenger car body. When a rear-end collision occurs, the traditional rear lower protection device of the truck cannot withstand the energy generated by the collision, and the passenger car can easily get into the truck. At the rear, the tragedy that caused the car crash happened.

In the event of a traffic accident with a larger or higher level of casualties, the accident personnel cannot issue an alarm signal for help at the first time due to the collision, and the vehicles passing by need to call the police. The place of occurrence, but basically can only tell the approximate site, unable to tell the exact location, resulting in insufficient signal and missed the best rescue opportunity.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a fast-response real-time location and early warning system for truck collision accidents.

In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions:

The present invention is a fast-response real-time location and early warning system for truck collision accident, comprising a front-end detection unit installed on the roof of the truck, a micro-control unit and a positioning transmission unit installed inside the truck compartment;

The front-end detection unit includes an electronic collision sensor and an ultrasonic ranging sensor;

The positioning transmission unit includes a GPS and a communication module, and the electronic collision sensor and the ultrasonic ranging sensor are electrically connected with the micro-control unit;

The micro-control unit is electrically connected with the GPS and the communication module, the electronic collision sensors are distributed and installed on the left and right sides and the rear end of the roof of the truck, and the ultrasonic ranging sensor is installed at the front end of the roof of the truck.

As a preferred technical solution of the present invention, the micro-control unit adopts the RaspberryPi4B module, receives the signals from the electronic collision sensor and the ultrasonic ranging sensor, and then sends the geographic location information of the accident area, that is, the alarm information, to the staff. , to achieve intermediate regulation and information transmission.

As a preferred technical solution of the present invention, the RaspberryPi4B module adopted by the micro-control unit includes a 1.5G processor, a memory card, a 5V-3A power interface, a micro-HDMI port, and a 4K resolution that supports dual monitors, and 2 USB2. 0 port, 2 USB3.0 ports, Gigabit Ethernet port and GPIO interface, and the GPIO interface is connected to the front-end detection and information transmission part.

As a preferred technical solution of the present invention, the electronic collision sensor adopts the CollisionsensorsV2.0 module, which outputs a low level when touched, and maintains a high level when released, which is used for contact collision detection. If the front-end switch of the module is installed, the module outputs Low level, no collision, output high level, there are M3 mounting holes on the module, which can be easily installed. At the same time, there is a switch indicator light, the light is on when there is a collision, and the light is off when there is no collision.

As a preferred technical solution of the present invention, the ultrasonic ranging sensor adopts HC-SR04 ultrasonic ranging sensor. First, a trigger signal of at least 10us is input to the TRIG pin, and 8 40kHz cycle levels are internally sent out to detect echoes. When an echo signal is detected, ECHO outputs a high-level echo signal, and the pulse width of the echo signal is proportional to the measured distance, so the distance can be calculated from the time interval between the transmitted signal and the received echo signal.

As a preferred technical solution of the present invention, the GPS adopts the EZ-0048 GPS module to perform satellite communication with UART or USB, and the GPS is connected with the micro-control unit to obtain the precise geographical position information of the truck. The communication module adopts the SIM900A module to The location information of the truck is transmitted.

Compared with the prior art, the beneficial effects of the present invention are as follows:

The system of the invention adopts a dual detection mode, and adopts a collision sensor and an ultrasonic ranging sensor for detection at the same time. As long as there is one outgoing level signal, the alarm can be completed; at the same time, it can alarm in real time. The information on the location of the traffic accident can be obtained immediately, which provides convenience for the follow-up rescue measures.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the embodiments of the present invention, and do not constitute a limitation to the present invention. In the attached image:

Fig. 1 is the system structure schematic diagram of the present invention;

Fig. 2 is the working flow chart of the present invention;

Fig. 3 is the GPIO interface diagram in the micro-control unit of the present invention;

4 is a schematic structural diagram of a communication module of the present invention;

Fig. 5 is the working schematic diagram of the electronic collision sensor of the present invention;

6 is a schematic diagram of the serial port connection of the communication module of the present invention;

Fig. 7 is the power supply input circuit diagram of the communication module of the present invention;

FIG. 8 is a schematic diagram of the installation structure of the present invention.

Detailed ways

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.

Example 1

As shown in Figures 1-8, the present invention provides a rapid-response truck collision accident real-time location and early warning system, including a front-end detection unit installed on the roof of the truck, a micro-control unit and a positioning transmission unit installed inside the truck compartment;

The front-end detection unit includes an electronic collision sensor and an ultrasonic ranging sensor, which are used to detect and judge the collision signal when the car collides. The working principle of the electronic collision sensor is that when the collision occurs, the deformation of the strain resistance causes the resistance value to change. And then the outgoing signal has many advantages such as sensitive signal sensing, fast outgoing signal speed, small size, etc., and can quickly detect whether the truck has collided. The ultrasonic ranging module is a ranging element that can transmit and receive ultrasonic waves. The principle of wave ranging, a sensor that can quickly detect the distance of the measured target, has the advantages of high accuracy, non-contact, low cost, etc. The electronic collision sensor and the ultrasonic ranging module together as the front-end detection module, when the power is turned on Under the circumstance that the electronic collision sensor and the ultrasonic ranging module work at the same time, when any one of the modules transmits a signal or transmits a signal at the same time, it can be considered that the truck has a collision accident, and the subsequent parts will be processed and transmitted. The signal is sent out, and the staff will carry out the follow-up disposal work;

The positioning transmission unit includes a GPS and a communication module, an electronic collision sensor and an ultrasonic ranging sensor are electrically connected with the micro-control unit;

The micro-control unit is electrically connected with the GPS and the communication module, the electronic collision sensors are distributed and installed on the left and right sides and the rear end of the roof of the truck, and the ultrasonic ranging sensor is installed at the front end of the roof of the truck.

Further, the micro-control unit adopts the RaspberryPi4B module to receive the signals from the electronic collision sensor and the ultrasonic ranging sensor, and then sends the geographic location information of the accident site, that is, the alarm information, to the staff to realize intermediate control and information transmission.

The RaspberryPi4B module adopted by the microcontroller unit includes 1.5G processor, memory card, 5V-3A power interface, micro HDMI port, 4K resolution support dual monitors, 2 USB2.0 ports, 2 USB3.0 ports, Gigabit Ethernet port and GPIO interface, and the GPIO interface is connected to the front-end detection and information transmission part. The software control of the Raspberrypi4B module is completed under the Raspbian operating system. There are many update sources, rich software, and the system is safe and stable. Start LXDE and use Python3 language to perform it. edit.

The electronic collision sensor adopts the CollisionsensorsV2.0 module, which belongs to the Arduino module. The port is compatible with the sensor expansion board. When it is touched, it outputs a low level, and when released, it keeps a high level. It is used for contact collision detection. Flat, no collision, output high level, there are M3 mounting holes on the module, which can be easily installed. At the same time, it also has a switch indicator light, the light will be on if there is a collision, and the light will be off if there is no collision, and it is connected with the Raspberrypi4BGPIO interface.

The ultrasonic ranging sensor adopts HC-SR04 ultrasonic ranging sensor, the detection distance can reach 2cm-400cm, the error is 0.3cm, the sensing angle is not less than 15 degrees, and it has good ranging performance. First, input a trigger of at least 10us to the TRIG pin Signal, 8 40kHz cycle levels are sent internally and echoes are detected. Once an echo signal is detected, ECHO outputs a high-level echo signal. The pulse width of the echo signal is proportional to the measured distance. The time interval of the received echo signal can be calculated to obtain the distance and connected with the Raspberrypi4BGPIO interface.

GPS adopts EZ-0048GPS module, which can communicate with UART or USB. Connect GPS and microcontroller unit to obtain accurate geographic location information of trucks. It has the characteristics of accurate positioning information and strong real-time performance. The communication module uses SIM900A module to locate trucks. For information transmission, GPS is EZ-0048GPS module built-in L80-39GPS chip, using CP2102 as USB to UART bridge chip, stable, reliable and fast, L80-39 has 66 search channels and 22 synchronous tracking, its operating voltage is 4.5V- 5.5V, position accuracy <2.5m, speed accuracy <1.0m/s, using NMEA0183 protocol for transmission; SIM900A module working frequency band is EGSM900MHZ and DCS1800MHZ, supports GPRSmuti-slotclass10/class8 and GRPS encoding format, SIM900A structural components are: Baseband, memory, GSM radio frequency circuit antenna, power supply circuit and SIM card holder, after installing the SIM card, you can access the Internet, send information to the staff's mobile phone, and complete the information transmission function. Connect with the GPIO port of the Raspberrypi4B module.

Specifically, the working environment of the system is: working voltage 5V, working current 100mA, working temperature -40 degrees Celsius to 85 degrees Celsius, detection distance 2cm-400cm is set to 5cm, detection distance error 0.3cm, position accuracy <2.5m, and connect Vehicle power supply; the working principle of this system is that when the truck collides, the collision sensor on the roof senses the collision signal or when the ultrasonic ranging sensor senses that the distance between the measured object and the truck is less than or equal to 5cm, it will The signal is transmitted to the RaspberryPi4B module, and then the signal is transmitted to the GPS module according to the edited program. The GPS module decodes the signal transmitted by the satellite, and then sends the obtained latitude and longitude information to the micro-control unit. Finally, the SIM900A module that has been connected to the Internet The SIM card transmits information and is processed by the staff to realize the functions of timely positioning and alarming.

The system of the invention adopts a dual detection mode, and adopts a collision sensor and an ultrasonic ranging sensor for detection at the same time. As long as there is one outgoing level signal, the alarm can be completed; at the same time, it can alarm in real time. The information on the location of the traffic accident can be obtained immediately, which provides convenience for the follow-up rescue measures.

Finally, it should be noted that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the The technical solutions described in the foregoing embodiments may be modified, or some technical features thereof may be equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (6)

1. a fast-response truck collision accident real-time location and early warning system, is characterized in that, comprises the front-end detection unit that is installed on the truck roof and the micro-control unit and the location transmission unit that installs the truck interior; The front-end detection unit includes an electronic collision sensor and an ultrasonic ranging sensor; The positioning transmission unit includes a GPS and a communication module, and the electronic collision sensor and the ultrasonic ranging sensor are electrically connected with the micro-control unit; The micro-control unit is electrically connected with the GPS and the communication module, the electronic collision sensors are distributed and installed on the left and right sides and the rear end of the roof of the truck, and the ultrasonic ranging sensor is installed at the front end of the roof of the truck. 2. a kind of fast-response truck collision accident real-time location and early warning system according to claim 1, is characterized in that, described micro-control unit adopts RaspberryPi4B module, receives the signal that electronic collision sensor and ultrasonic ranging sensor come from , and then send the geographic location information of the accident site, that is, the alarm information, to the staff to achieve intermediate control and information transmission. 3. a kind of fast-response truck collision accident real-time location and early warning system according to claim 2, is characterized in that, the RaspberryPi4B module that described micro-control unit adopts, comprises 1.5G processor, memory card, 5V-3A Power interface, micro HDMI port 4K resolution supports dual monitors, 2 USB2.0 ports, 2 USB3.0 ports, Gigabit Ethernet port and GPIO interface, and the GPIO interface is connected to the front-end detection and information transmission part. 4. a kind of fast-response truck collision accident real-time location and early warning system according to claim 2, is characterized in that, described electronic collision sensor adopts CollisionsensorsV2.0 module, outputs low level when touching, releases and keeps high electricity Flat, used for contact collision detection, the front switch of module installation has collision, the module outputs low level, no collision, and outputs high level, there are M3 mounting holes on the module, which can be easily installed, and also has a switch indicator light, there is collision The light is on, and the no-collision light is off. 5. a kind of fast-response truck collision accident real-time location and early warning system according to claim 1, is characterized in that, described ultrasonic ranging sensor adopts HC-SR04 ultrasonic ranging sensor, first input at least 10us to TRIG feet. Trigger signal, internally send out 8 40kHz cycle levels and detect echoes. Once echo signals are detected, ECHO outputs a high-level echo signal. The pulse width of the echo signal is proportional to the measured distance. The distance can be calculated from the time interval to the received echo signal. 6. a kind of fast-response truck collision accident real-time positioning and early warning system according to claim 1, is characterized in that, described GPS adopts EZ-0048 GPS module to carry out satellite communication with UART or USB, and GPS and micro-control unit Connect to obtain accurate geographic location information of the truck, and the communication module uses the SIM900A module to transmit the location information of the truck.

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