CN214273738U

CN214273738U - Tunnel vehicle collision early warning device based on attitude sensor

Info

Publication number: CN214273738U
Application number: CN202120176297.2U
Authority: CN
Inventors: 李文; 龚绍杰; 叶琳; 罗明; 李海林
Original assignee: Sichuan Jiutong Zhilu Technology Co ltd
Current assignee: Sichuan Jiutong Zhilu Technology Co ltd
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-09-24
Anticipated expiration: 2031-01-22

Abstract

The utility model discloses a tunnel vehicle collision early warning device based on an attitude sensor, which belongs to the technical field of intelligent traffic and comprises a plurality of detection devices vertically arranged at the road test edge of a tunnel and a gateway arranged on the side wall of the tunnel; whether vehicle collision happens on the edge of a road in a tunnel is detected through the attitude sensor, the microcontroller sends collision event information to a gateway which is closest to the collision event through the LORA communication unit, the gateway which is closest to the collision event uploads the position information of the collision event to the control platform, the control platform issues a light control instruction to the microcontroller, and the microcontroller controls the light control unit to change the color and the flashing mode of the traffic induction lamp. The utility model provides a tunnel vehicle striking detection device lays tunnel vehicle striking detection device based on attitude sensor through the curbs in tunnel both sides to carry out the network deployment through the gateway, thereby realize in the tunnel accurate location of vehicle striking incident, report and emergent light response in real time.

Description

Tunnel vehicle collision early warning device based on attitude sensor

Technical Field

The utility model relates to a vehicle striking early warning device, concretely relates to tunnel vehicle striking early warning device based on attitude sensor.

Background

For a long time, due to the factors of relatively narrow and small space, poor illumination and ventilation conditions and the like of the tunnel, once a traffic accident occurs in the tunnel, if the traffic accident is not discovered and treated in time, huge traffic pressure is caused; great difficulty is brought to rescue and dredging, and hidden danger is more serious when a tunnel is long.

The method is to realize the uninterrupted monitoring of the whole section of the whole tunnel range, effectively detect the occurrence of traffic accidents in the tunnel and transmit accident information to a traffic emergency command center and a road management unit in time.

The existing tunnel traffic accident detection modes comprise video monitoring, RFID identification, infrared arrays and the like. The method is widely applied to judging whether a traffic accident occurs or not by analyzing through an image processing technology based on video monitoring. Such as patent numbers: CN201810881698.0 entitled "automatic detection method for tunnel accident". In view of the low distribution density of the video monitoring equipment, the video monitoring equipment is only distributed at some key positions, and the whole tunnel cannot be fully covered; and the video monitoring is greatly influenced by light and meteorological environment, and has great influence on the quality of video or image acquisition.

The RFID adopts a digital label technology, such as the patent number CN201120351043.6, and is named as an automatic detection system for the abnormal traffic events of the highway tunnel based on the RFID. The RFID electronic access card is installed on the vehicle, the card reading device is installed in the tunnel, the card reading device judges the traffic operation condition by identifying the number of the RFID electronic access cards in the tunnel within a certain time, the reading range of the RFID reading device is small, the scheme can only identify the vehicle with the RFID electronic access card, and the vehicle which is not installed cannot be identified, so that the vehicle access card has great limitation.

The infrared array technology is feasible in theory, and the infrared correlation tube mode is adopted to detect the vehicle. However, under the condition that the tunnel is easy to accumulate dust, the later maintenance cost is high, and the scheme is widely applied with great difficulty.

Among the prior art, patent CN207924924U discloses a road early warning guidance system, including early warning device and command platform, early warning device is including installing the early warning starting drive on the car and corresponding a plurality of light guiding device who installs on the rail of road both sides respectively, early warning starting drive includes first power module, first control chip, GPS orientation module, impact sensor and wireless transmission module, each light guiding device is all including installing a plurality of double-colored LED lamp cluster and second power module on the rail, second control chip and signal receiver. When the vehicle collides, the early warning starting device is automatically started and sends a signal to the command platform, and the command platform controls the two-color LED lamp strings on the two sides of the accident vehicle to be lightened according to the information of the GPS positioning module, so that the two-color LED lamp strings on the two sides of the fence have different colors, a driver can know the accident in front, and the driver can be guided to change lanes in advance, and the smoothness of the road is ensured.

The above patents mainly suffer from the following disadvantages: firstly, this patent passes through wireless transmission module communication, and the place that the signal is not good can't realize timely communication or communication effect is poor in the tunnel, and secondly the colour of light induction device is more single, can't predetermine multiple light scheme as required.

Disclosure of Invention

The utility model discloses aim at solving the above-mentioned problem that exists among the prior art, provide a tunnel vehicle striking early warning device based on attitude sensor, the device has realized accurate location, the real-time report and emergent light response of vehicle striking incident in the tunnel.

In order to achieve the above purpose, the technical solution of the present invention is as follows:

a tunnel vehicle collision early warning device based on attitude sensors comprises an early warning device and a control platform, and is characterized in that the early warning device comprises a plurality of collision detection devices arranged at the edges of two sides of a tunnel at intervals and traffic induction lamps integrated with the detection devices; the detection device comprises a power supply, a microcontroller, an attitude sensor, an LORA communication unit, a GPS positioning module and a light control unit; the power supplies power for the whole early warning device, the attitude sensor is used for detecting whether a collision event occurs, the input end of the microcontroller is respectively connected with the attitude sensor and the GPS positioning module, the output end of the microcontroller is connected with the input end of the light control unit, the output end of the light control unit is connected with the traffic induction lamp, and the microcontroller is in communication connection with the control platform through the LORA communication unit.

Furthermore, a plurality of gateways are arranged in the tunnel at intervals, the impact detection device sends impact signals to the gateways which establish communication with the impact detection device through the LORA communication unit, and the gateways upload the position information of impact events to the control platform through the 4G network.

Further, two adjacent gateways are arranged at an interval of 400-700m, and two adjacent detection devices are arranged at an interval of 10-15 m.

Further, the early warning device adopts DC direct current power supply, the power supply range is 12-60V, the power supply circuit comprises a DC/DC power supply conversion circuit and an LDO voltage reduction circuit, and the DC/DC power supply conversion circuit converts the power supply into 5V to supply power for the detection device and the light control unit; the LDO voltage reduction circuit converts a 5V power supply into 3.3V power supply for the microcontroller, the attitude sensor and the LORA communication unit.

Further, the microcontroller adopts a 32-bit M3 series single chip microcomputer.

Further, the attitude sensor employs an MPU6050, which is integrated with a three-axis accelerometer and a three-axis gyroscope.

Further, the light control unit is a traffic induction lamp driving circuit and comprises a current-limiting resistor, an NMOS tube grid pull-down resistor, an NMOS tube grid driving current-limiting resistor, a plurality of RGB full-color co-anode LED lamps connected in parallel and an NMOS tube used for driving the RGB full-color co-anode LED lamps.

Furthermore, the red end, the green end and the blue end of the RGB full-color common-anode LED lamp are respectively and correspondingly connected into three NMOS tubes, and the input ends of the NMOS tubes are connected with the output end of the microcontroller.

The utility model has the advantages that:

1. the utility model provides a tunnel vehicle strikes early warning device, through laying tunnel vehicle striking detection device based on attitude sensor at tunnel both sides curbs to network deployment through the gateway, thereby realize the accurate location of vehicle striking incident in the tunnel, report in real time and emergent light response;

2. the utility model integrates the detection device and the traffic induction lamp, and can be used as the intelligent light induction road sign of the tunnel at ordinary times, thereby achieving two purposes;

3. the utility model discloses tunnel vehicle striking detection device possesses functions such as induced light colour, luminance, scintillation mode regulation, and need not to reach field operation, can set up remotely through control platform; various light schemes (such as different weather conditions, different traffic flows and accident states) can be preset according to actual needs, and more intelligent tunnel traffic operation environment can be realized through cooperation with other intelligent systems.

Drawings

FIG. 1 is a system block diagram of a tunnel vehicle collision early warning device based on an attitude sensor according to the present invention;

FIG. 2 is a flow chart of a tunnel vehicle crash event response;

FIG. 3 is a light control flow diagram;

FIG. 4 is a schematic diagram of power management;

FIG. 5 is an LED driver circuit;

wherein the content of the first and second substances,

1. a power source; 2. a microcontroller; 3. a LORA communication unit; 4. an attitude sensor; 5. a light control unit; 6. a GPS positioning module; 11. a power supply DC power supply; 12. a general purpose diode; 13. a TVS transient diode; 14. a self-healing fuse; 15. TPS54260 step-down power management chip; 16 is a freewheeling diode; 17. an output filter capacitor; 18. an output filter capacitor; 19. SPX3819 low dropout linear power converters; 51. an RGB full-color common-anode LED; 52. a current limiting resistor; 53. an NMOS tube; 54. a pull-down resistor of the NMOS tube grid; 55. the NMOS tube grid drives the current-limiting resistor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "vertical", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that the utility model is usually placed when using, or the orientation or positional relationship that a person skilled in the art usually understands, only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the device or element that is referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

The embodiment provides a tunnel vehicle collision early warning device based on attitude sensor, including early warning device and control platform, early warning device is including integrated collision detection device and traffic induction lamp together, collision detection device comprises power 1, microcontroller 2, attitude sensor 4,

LORA communication unit

3, 55 parts of light control unit, and the system block diagram is shown in figure 1.

The impact detection device is powered by DC direct current, the power supply range is 12-60V, and the device can be directly connected to the conventional traffic guidance lamp system due to the large power supply range. The power supply 1 management comprises DC/DC and LDO two-stage power supply 1 conversion, wherein the DC/DC converts the power supply 1 into 5V, and the 5V power supply 1 supplies power for the system and the light control unit 5; the LDO converts the 5V power supply 1 into 3.3V, and the 3.3V supplies power to the microcontroller 2, the attitude sensor 4, and the LORA communication unit 3.

The microcontroller 2 adopts a 32-bit M3 series single chip microcomputer which is a core control unit of the system and is responsible for processing data of the attitude sensor 4, LORA communication and monitoring the working state of the device.

The attitude sensor 4 uses an MPU6050, which integrates a three-axis accelerometer and a three-axis gyroscope, and the attitude sensor 4 determines whether an impact event occurs by detecting a change in acceleration of the impact detection device caused when the vehicle impacts a road. The acceleration detection sensitivity for impact detection is 1/1000G (G is gravity acceleration), and by setting a proper detection threshold value, the conventional fine vibration can be effectively distinguished from the vehicle impact, so that the vehicle impact event can be accurately detected.

The LORA communication unit 3 is used for wireless communication between the tunnel collision detection device and the gateway. The light control unit 5 is a driving circuit of a tunnel traffic induction lamp, and the traffic induction lamp adopts an RGB full-color common-sun LED 51.

Fig. 4 is a schematic diagram of a power management part of the tunnel vehicle detection device, which is composed of DC/DC power conversion and LDO step-down. 11 is a direct current power supply; 12 is a general diode used for power supply reverse connection prevention protection; 13 is TVS transient diode for transient pulse protection; 14 is a self-recovery fuse used for device overcurrent protection; 15 is TPS54260 step-down power management chip; 16 is a freewheeling diode; 17 is an output filter capacitor; 18 is an output filter capacitor; and 19 is an SPX3819 low-voltage-difference linear power converter. 12-18 constitute the first stage DC/DC step-down conversion circuit, convert 24V DC power supply into 5V power supply, and SPX3819 converts 5V into 3.3V.

As shown in fig. 5, the light control unit circuit is shown, the traffic induction lamp used by the vehicle collision detection device is an RGB full-color common-positive LED, 5V power is supplied, 6 parallel RGB full-color common-positive LEDs are driven by NMOS tubes, the red end, the green end and the blue end of the RGB full-color common-positive LED lamp are respectively and correspondingly connected to three NMOS tubes, and the input end of each NMOS tube is connected to the output end of the microcontroller. In fig. 5, 51 is an RGB full-color common-anode LED, 52 is a current-limiting resistor, 53 is an NMOS transistor, 54 is an NMOS transistor gate pull-down resistor, and 55 is an NMOS transistor gate drive current-limiting resistor. The microcontroller generates PWM signals to drive the NMOS tube to control the colors and the brightness of the 6 LEDs, the frequency of the PWM signals is 1kHz, the duty ratio is adjustable between 0% and 100%, when the duty ratio is 0, the LED lamp is turned off, and when the duty ratio is 100%, the brightness of the LED is the maximum. The colors of the LED lamps are combined and controlled through three paths of PWM signals, like the mode that R red + G green is lightened to set the LEDs to be yellow, R red + B blue is lightened to be purple, R red + G green + B blue is lightened to be white, and other colors can be combined and set according to the three primary colors.

The utility model discloses a theory of operation:

whole tunnel vehicle striking early warning device contains a plurality of tunnel vehicle striking detection device and gateway, and striking detection device's mounting means is unanimous with the induced lamp of tunnel traffic, arranges for interval 15m usually, and the gateway then arranges for the interval 500m for guaranteeing that communication is reliable according to tunnel length and actual LORA communication coverage in a flexible way. After the whole system is electrified and works, the collision detection device is used as a traffic guidance signal lamp to provide street lamp light guidance for a driver while continuously detecting a collision event, when the collision event of a vehicle is detected, the collision signal is sent to the gateway by the vehicle collision detection device through the LORA communication unit, and the gateway uploads the position information of the collision event to the control platform through the 4G network; when the collision signals are uploaded, the control platform issues light control information to each collision detection device through the LORA communication unit to modify the colors and the flashing states of the induced light so as to remind the following vehicles.

Further, for a long tunnel, since the 4G network in the tunnel cannot be covered, there is usually only a stable 4G signal at the first gateway at the tunnel entrance, and when a vehicle collision event is detected by a certain tunnel vehicle collision detection apparatus, the response flow chart is shown in fig. 2. Assuming that the number of installed gateways in a tunnel is N, each gateway manages 35 detection devices, after a vehicle collision event occurs and triggers a detection device below a gateway X, the detection device sends information to the gateway X, the gateway X transmits the event information to an upper gateway X-1 through a LORA communication unit, the gateway X-1 continues to transmit the information to a gateway X-2 after receiving the information, and so on until the gateway 1 receives a signal and uploads the signal to a control platform. Accurate positioning of a vehicle impact event can be achieved by configuring each impact detection device with location information. After the gateway 1 uploads the impact event, the gateway 1 issues a light control instruction to change the color and flashing mode of the induced LED light so as to remind the following vehicles to pay attention to the road condition. The specific process is described in the following light control explanation:

after the tunnel vehicle collision detection device based on the attitude sensor detects a collision event, subsequent vehicles can be reminded by controlling the colors and the flickering states of induced LED light of the tunnel vehicle collision detection device, and a flow chart of light control is shown in figure 3. After receiving the impact event information, the gateway 1 uploads a signal to a control platform and issues a light control instruction, each instruction comprises a light scheme and time information, the gateway 1 forwards the instruction to the gateway 2 and issues the instruction to a plurality of impact detection devices corresponding to the gateway 1, and the impact detection devices corresponding to the gateway 1 execute the light scheme after receiving the instruction; the gateway 2 receives the instruction of the gateway 1, calculates the time from the instruction sent by the gateway 1 to the instruction received by the gateway 2, calculates the delay time according to the light synchronization period, delays the corresponding time and sends the instruction to the impact detection device corresponding to the gateway 2, so that the light of the impact detection devices below the gateway 1 and the gateway 2 is synchronized, and the instruction is transmitted and forwarded to the gateway 3. In the same way, the light synchronization of the impact detection devices corresponding to the gateway 2 and the gateway 3, and the impact detection devices corresponding to the gateway N-1 and the gateway N can be realized by analogy; thereby realizing the synchronous control of the light in the whole tunnel.

The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the technical matters of the present invention all fall into the protection scope of the present invention to any simple modification and equivalent change of the above embodiments.

Claims

1. A tunnel vehicle collision early warning device based on attitude sensors comprises an early warning device and a control platform, and is characterized in that the early warning device comprises a plurality of collision detection devices arranged at the edges of two sides of a tunnel at intervals and traffic induction lamps integrated with the detection devices; the detection device comprises a power supply (1), a microcontroller (2), an attitude sensor (4), an LORA communication unit (3), a GPS positioning module (6) and a light control unit (5); the power supply (1) supplies power for the whole early warning device, and whether attitude sensor (4) are used for detecting the striking incident and produce, the input of microcontroller (2) respectively with attitude sensor (4), GPS orientation module (6) are connected, the output of microcontroller (2) with the input of light control unit (5) is connected, and the output and the traffic induction lamp of light control unit (5) are connected, and microcontroller (2) establish communication connection with control platform through LORA communication unit (3).

2. The attitude sensor-based tunnel vehicle collision early warning device according to claim 1, wherein: a plurality of gateways are arranged in the tunnel at intervals, the impact detection device sends impact signals to the gateways which establish communication with the impact detection device through the LORA communication unit (3), and the gateways upload the position information of impact events to the control platform through the 4G network.

3. The attitude sensor-based tunnel vehicle collision early warning device according to claim 2, wherein: two adjacent gateways are arranged at an interval of 400-700m, and two adjacent detection devices are arranged at an interval of 10-15 m.

4. The attitude sensor-based tunnel vehicle collision early warning device according to claim 1, wherein: the early warning device is powered by DC direct current, the power supply range is 12-60V, a power supply (1) circuit comprises a DC/DC power supply (1) conversion circuit and an LDO voltage reduction circuit, and the DC/DC power supply (1) conversion circuit converts the power supply (1) into 5V to supply power for the detection device and the light control unit (5); the LDO step-down circuit converts a 5V power supply (1) into 3.3V to supply power for the microcontroller (2), the attitude sensor (4) and the LORA communication unit (3).

5. The attitude sensor-based tunnel vehicle collision early warning device according to claim 1, wherein: the microcontroller (2) adopts a 32-bit M3 series single chip microcomputer.

6. The attitude sensor-based tunnel vehicle collision early warning device according to claim 1, wherein: the attitude sensor (4) adopts an MPU6050 which is integrated with a three-axis accelerometer and a three-axis gyroscope.

7. The attitude sensor-based tunnel vehicle collision early warning device according to claim 1, wherein: the light control unit (5) is a traffic induction lamp driving circuit and comprises a current-limiting resistor (52), an NMOS tube grid pull-down resistor (54), an NMOS tube grid driving current-limiting resistor (55), a plurality of RGB full-color common-anode LED (51) lamps connected in parallel and an NMOS tube (53) used for driving the RGB full-color common-anode LED (51) lamps.

8. The attitude sensor-based tunnel vehicle collision early warning device according to claim 7, wherein: the red end, the green end and the blue end of the RGB full-color common-anode LED (51) lamp are respectively and correspondingly connected into three NMOS tubes (53), and the input end of each NMOS tube (53) is connected with the output end of the microcontroller (2).