Roads traffic collision early warning device

An early warning device and road traffic technology, which is applied to the traffic control system of road vehicles, traffic flow detection, traffic control system, etc., can solve the problems of limited application occasions, single function, neglect of early warning signals, etc. Application range, reasonable structure effect

Active Publication Date: 2008-05-14
杭州尊鹏信息科技有限公司
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AI-Extracted Technical Summary

Problems solved by technology

This kind of early warning device has only one warning method, single function and limited application occasions
[0005] Usually, when the early warning information directly related to the event has a direct and effective early warning effect on the traffic participants, such as the on-site command of the traffic police, th...
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Method used

Referring to Fig. 5 for the circuit principle of embodiment laser on-shooting vehicle passing detector 101, laser emission part 1011 comprises wireless control switch 101-1, modulation and controller 101-2 and laser emission module 101-3, laser The receiving section 1012 includes a laser receiving unit 101-4 and a demodulator and controller 101-5. Wireless control switch 101-1 is connected with modulation and controller 101-2, modulation and controller 101-2 is connected with laser emitting module 101-3, laser receiving unit 101-4 is connected with demodulation and controller 101-5 The demodulation and controller 101-5 is connected with the main controller 6, and the power supply 11 is connected with the wireless control switch 101-1 and the laser emitting module 101-3. The laser emitting part 1011 is an independent module. When the visibility is higher than the threshold, it does not need to work. Therefore, when the road traffic conflict warning device is closed, the laser emitting part 1011 accepts the closing command sent by the upper host, and through the wireless control switch 101- 1 Turn off laser emission. When it needs to be turned on, the upper host turns on the laser emitting part 1011 through the wireless control switch 101-1. The modulation and controller 101-2 is to effectively identify a large number of interference signals that may exist along the highway, and perform signal modulation on the laser before emitting to ensure the validity of the signal. The laser emitting module 101-3 is a laser emitting assembly that combines a laser device, an excitation d...
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Abstract

The invention discloses an early-warning device for road traffic conflicts, which comprises a passing vehicle detector, a staying vehicle detector, a pedestrian detector, a data receiving module, a main control module, a forward alarm, a backward alarm, a driving module, a data communications interface, a voice communications and broadcast module, and a power source. An LED array is installed inside the backward alarm, and a light source and a light-gathering part are installed inside the forward alarm. Output terminals of the passing vehicle detector, the staying vehicle detector and the pedestrian detector connect to the data receiving module; the output terminal of the data receiving module connects to the main control module; the main control module connects to the data communications interface; the other end of the data communication interface connects to the voice communications and broadcast module; and the output terminal of the main control module, via the driving circuit, connects to the forward alarm and backward alarm. The invention provides the multiple early-warning information preventing conflicts to the traffic participants in the region of low visibility and traffic blind spot with the advantages of a good effect in warning and a wide application.

Application Domain

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  • Roads traffic collision early warning device
  • Roads traffic collision early warning device
  • Roads traffic collision early warning device

Examples

  • Experimental program(1)

Example Embodiment

[0029] See the drawings for the structure of the embodiment.
[0030] Referring to Figure 1, the road traffic conflict early warning device is mainly composed of a housing, a vehicle passing detector 1, a vehicle staying detector 2, a pedestrian passing detector 3, a data receiving module 4, a data communication interface 5, a main control module 6, and voice communication And the broadcast module 7, the drive module 8, the backward warning device 9, the forward warning device 10 and the power supply 11. The output ends of the vehicle passing detector 1, the vehicle staying detector 2 and the pedestrian passing detector 3 are connected to the data receiving module 4, the output of the data receiving module 4 is connected to the main control module 6, and the main control module 6 is connected through the data communication interface 5. Connect the upper computer SWJ, the other end of the data communication interface 5 is connected to the voice communication and broadcast module 7, the output end of the main control module 6 is connected through the backward drive circuit 8-1 and the backward warning device 9 through the forward drive circuit 8 -2 is connected to the forward warning device 10, the output end of the power supply 11 is connected to the power input end of the conflict warning device and the power input end of the detection module, and the vehicle passes the detector 1, the vehicle staying detector 2, the pedestrian passing detector 3, The data receiving module 4, the main control module 6, the voice communication and broadcasting module 7, the rear and forward driving circuits 8-1 and 8-2, the rear warning device 9, and the forward warning device 10 supply power.
[0031] Referring to FIG. 2, the display surface of the rearward warning device 9 of the embodiment is equipped with a light emitting diode array, and is equipped with a display surface warning brightness adjustment component, and the display surface has a warning icon area 9-1 and a warning text area 9-2. The LED dot matrix is ​​used to form warning graphics and simple warning sentences. The LED dot matrix arranged in the rearward warning device 9 is driven by the rearward driving circuit 8-1. In this embodiment, a fixed "triangular mark" pattern and two 32×32 dot matrixes are used, and a 74HC595 driving circuit is used to emit light. The diode dot matrix is ​​driven, and the drive circuit 8-1 can also use Texas Instruments’ TLC5941 chip, Taiwan’s Macroblock MBI’s MBI5028, and Taiwan’s Dianjing Technology SITI’s ST2221C. Pre-made light boxes can also be used for warning graphics and simple warning words. The rearward warning device 9 is a key component to prevent traffic conflicts. When in use, the display surface of the backward warning device 9 is installed on the side of the road facing the direction of the vehicle, that is, installed opposite to the driving direction of the vehicle. The LED brightness of the rearward warning device 9 is controlled by the main controller 6, and adjusted by the display surface warning brightness adjustment component. When it is started during the day, the high-brightness display mode is used. When the display is in low visibility, the brightness of the LED is adjusted according to the level of visibility. Send early warning information as far as possible without being dazzling. In order to avoid misleading drivers when the warning device is not turned on, the rearward warning device 9 uses light-colored glass at the front end of the graphic sign to block the internal graphics, and the triangular warning graphic does not use reflective film. When the warning device is not activated, Basically no warning graphics can be seen from the outside. When starting, the warning device displays the warning graphics to the oncoming car through the light-colored glass, in order to strengthen the display effect, the rearward warning device 9 flashes according to the preset frequency or the warning signs and warning words according to the frequency given by the controller. The dot matrix display component can also accept commands from the host computer to display simple text or graphics, and can be used as a simple electronic information sign when it is not used as a road traffic conflict warning device.
[0032] Referring to Fig. 3, the forward warning device 10 is a high-brightness cluster illuminator arranged along the running direction of the vehicle, with light sources and condensing parts installed inside. The light source can choose dual light sources or multiple light sources or a single light source combination, and strong light LED or Other high-brightness light sources. Single light source combination is more suitable for use at night; multi-light source combination can be used in low visibility during the day. When a short-wavelength purple light source is selected, the warning effect is more obvious; when white light is used as the warning light source, the gradual brightness technology can be used. The transition time from lighting the light source to the brightest light source is about 1 to 3 seconds. This method can reduce the impact on the vehicle. The impact of light, and can be distinguished from the flashlight used by electronic police. When activated, the forward warning device 10 will continuously or intermittently emit a focused illumination light JJZMQG in the direction of travel of the preceding vehicle. The strong light can illuminate the rear of the vehicle YTGCL that has passed in front, and prompt the vehicle behind to indicate the existence of the vehicle in front. Embodiment The forward warning device 10 is composed of 8 high-power LED lighting modules driven by the forward driving circuit 8-2. The light-concentrating component collects the 8 independent LED lighting modules in a honeycomb type, and the forward driving circuit 8-2 uses relays; the total power consumption of 8 LEDs is about 3W~3.5W.
[0033] Referring to Fig. 4, the vehicle passing detector 1 of the embodiment adopts a laser on-beam vehicle passing detector 101. The laser on-beam vehicle passing detector 101 is mainly composed of a laser emitting part 1011 and a laser receiving part 1012. The laser emitting part 1011 is installed in On one side of the road, the laser receiving part 1012 is installed on the other side of the road, and the two are installed oppositely. In the figure, TXCLFX indicates the direction of traffic. When there is no traffic, the laser receiving part 1012 can receive the modulated laser signal DZJGXH emitted by the laser emitting part 1011. When a vehicle passes, the signal emitted by the laser emitting part 1011 will be temporarily blocked by the passing vehicle, during which time the laser receiving part 1012 cannot receive it. The modulated laser signal DZJGXH emitted by the laser emitting part 1011, the laser receiving part 1012 can receive the modulated signal sent by the laser emitting part 1011 after the vehicle passes, thereby detecting whether there is a vehicle passing the road. The working process of the vehicle passing detector 1 is shown in FIG. 11.
[0034] Embodiment The circuit principle of the laser beam passing detector 101 is shown in FIG. 5. The laser emitting part 101 1 includes a wireless control switch 101-1, a modulation and controller 101-2, a laser emitting module 101-3, and a laser receiving part 1012. It includes a laser receiving unit 101-4 and a demodulation and controller 101-5. The wireless control switch 101-1 is connected with the modulation and controller 101-2, the modulation and controller 101-2 is connected with the laser emitting module 101-3, and the laser receiving unit 101-4 is connected with the demodulation and controller 101-5 The demodulation and controller 101-5 is connected with the main controller 6, and the power supply 11 is connected with the wireless control switch 101-1 and the laser emitting module 101-3. The laser emission part 1011 is an independent module. When the visibility is higher than the threshold, it does not need to work. Therefore, when the road traffic conflict warning device is turned off, the laser emission part 1011 accepts the shutdown command sent by the upper host computer and controls the switch 101- by wireless 1Turn off the laser emission. When it needs to be turned on, the upper host computer turns on the laser emitting part 1011 through the wireless control switch 101-1. The modulation and controller 101-2 is to effectively identify a large number of interference signals that may exist along the highway, and to modulate the signal before laser emission to ensure the validity of the signal. The laser emitting module 101-3 is a laser emitting assembly that combines a laser device, an excitation device, and a mounting member. The embodiment selects the semiconductor laser HL7892E/G produced by Hitachi, or the industrial-grade laser emitting component LB-00617/YD. In a vehicle passing detection environment with little interference, it can be obtained only by stable intermittent pulse detection. Very good vehicle passing detection effect. When powered by solar energy, in order to save energy, the laser emitting module 101-3 implements an intermittent working mode, and the interval for stopping emitting is smaller than the shortest vehicle length passing time. The laser receiving part 1012 can use a simple photodiode as the laser receiving unit 101-4 in most application environments. The models selected in this embodiment are PT315AB, BPW76B, ST-1KL3A and so on. However, when applied in a very complex environment with strong interference, the core component of the laser receiving part 1012 uses an avalanche photodiode, the model is GT231 Si APD. Modulation and demodulation are usually paired. When the modulator uses the recognition algorithm for modulation, the demodulation and controller 101-5 must demodulate the received laser modulation signal. Usually this mode is only used in complex environments. In most application environments, when ordinary photoelectric devices are used for detecting signal reception, the identification signal can be superimposed on the transmitting end, such as adding a fixed code, the receiving end recognizes the code, and the signal is sent to the main controller after receiving and shaping 6 Perform identification.
[0035] The laser beam passing through the detector 101 can also be used as a simple local visibility recognizer. When the visibility is good, the laser signal intensity received by the receiver will be higher. When the visibility is low, the laser signal intensity received by the receiver will also vary. It is weakened, and the changes in local visibility can be effectively identified through the above changes. When the road traffic conflict early warning device is running alone, the estimated visibility value judged by the laser beam vehicle through the detector 101 is one of the conditions for starting the early warning device. When the visibility is low, the signal received by the receiver is lower than the preset value When the threshold is reached, the main control module 6 issues an instruction to start the early warning device. When in the state of networking, the start command is issued by the upper visibility detector. When the visibility is lower than the threshold, for example, when the visibility is lower than 1000 meters, the upper computer sends out the early warning device start command and the early warning device is activated. If there is a vehicle at this time When passing by, the early warning device works and warns the vehicle behind.
[0036] Existing one-way lanes of expressways are generally greater than or equal to two lanes, and vehicle passing detection methods vary with lanes. The laser beam is used to detect passing vehicles on a one-way two-lane lane. When detecting a passing vehicle on a highway with two lanes or more, the laser beam can still be used to detect the passing of vehicles. However, due to the one-way Half of the highway has a wide lane. If the laser beam is not strong enough, it may be interrupted by the dense fog. In addition, because of the multi-lane situation, it is not known which lane has a car. Early warning of the lane will cause the "wolf is coming" phenomenon, and ultimately weaken the effectiveness of the early warning device. If you don't need to consider the problem of lane occupancy, you can also increase the power of the laser transmitter to maintain the effectiveness of the vehicle traffic detector. That is to say, the road surface larger than two lanes can also use the laser method to detect the vehicle traffic state.
[0037] For roads with more than two lanes in one direction, the Doppler effect detection technology and infrared heat detection technology are combined to detect passing vehicles. By adjusting the emission angle and emission power of the microwave transmitter module that produces the Doppler effect, multiple controls can be controlled. The detection range of the Puller effect microwave detection module. When using a one-way three-lane or more than three-lane roads, install a detector on the side of the road and in the central isolation zone. The detector installed in the central isolation zone of the road covers the two lanes on both sides, and the detector installed at the edge of the road covers the In the two lanes on the side, when the edge detector detects a vehicle passing, the warning device at the edge of the road is lit; when the road center point detector detects a vehicle passing, the warning device at the center of the road is lit, so that the following vehicles can Roughly distinguish the traffic lane of the vehicle in front.
[0038] There are many technical means to ensure the real-time and effective detection of vehicles in various application environments. According to the traffic warning objects at different conflict points, the vehicles can be selected according to the corresponding vehicle passing detectors and visible light or non-visible light waveband through-beam detection Detector, microwave detection detector, ultrasonic detection detector, ground induction coil detection detector, video automatic identification detector, sound wave identification detector. Various vehicle passing detectors can provide a signal to determine whether the warning device is activated.
[0039] When the vehicle passage detector 1 of the embodiment adopts a microwave detection detector, the microwave detection vehicle passage detector has two installation methods: independent installation and embedded installation.
[0040] 6, the independently installed microwave detection vehicle passing detector 102 includes a microwave transceiver head assembly 102-1, a signal preprocessing and analysis circuit 102-2, and a digital wireless transmission module 102-3. The signal pre-processing and analysis circuit 102-2 is connected with the microwave transceiver head assembly 102-1 and the digital wireless transmission module 102-3, and the independently installed microwave detection vehicle is connected with the power supply 11 through the detector 102. The embodiment adopts a modified dual-check detector to limit the detection wavelength between 6.5um and 8.6um, and a filter silicon chip is covered in front of the infrared pyro release tube receiving window of the dual-check detector with a detection distance of 12 to 18 meters. Install to the early warning device bracket. The microwave transceiver head assembly 102-1 is composed of a resonant module and an amplifying circuit module board. It can also be composed of a resonant module plus a signal amplifying and processing circuit. The resonant module can use imported components from Singapore, South Africa, and Germany, or domestic components. The signal pre-processing and analysis circuit 102-2 is a microprocessor, and LPC900 is selected in the embodiment. Its main function is to identify the traffic situation of the vehicle on the side lane and transmit it to the main control module 6 through the digital wireless transmission module 102-3.
[0041] Referring to FIG. 7, the detection circuit of the embedded microwave detection vehicle passing detector 103 is the same as the independently installed module, including the microwave transceiver head assembly 102-1 and the signal preprocessing and analysis circuit 102-2. The embedded installation microwave detection vehicle is embedded and installed in the early warning device through the detector 103, the microwave transceiver head assembly 102-1 and the signal pre-processing and analysis circuit 102-2 are connected, and the signal pre-processing and analysis circuit 102-2 passes The data communication interface 5 is connected with the main control module 6.
[0042] Referring to Figures 8 and 9, the vehicle stay detector 2 uses two or more pyro-receiving tubes 2-1, and each pyro-receiving tube 2-1 is arranged in order of different forward angles, and the embodiment uses three Pyrolysis receiving tube 2-1. The vehicle stay detector 2 includes pyro-receiving tubes 2-11, 2-12, 2-13, amplifying and shaping circuit 2-2, three vehicle staying detection processors 2-3, and three amplifying and shaping circuits 2-2 They are connected to the pyro-receiving tubes 2-11, 2-12, and 2-13 respectively, and the three amplification and shaping circuits 2-2 are connected to the vehicle stay detection processor 2-3, and the vehicle stay detection processor 2-3 is connected to the data receiving Module 4 is connected. The pyro-receiving pipe 2-11 of the embodiment adopts the PM611 unit pyro-receiving pipe or the PD632 dual-element pyro-receiving pipe of Shanghai Nisela Sensor Co., Ltd., and the vehicle stay detection processor 2-3 uses the LPC900 series product.
[0043] When a vehicle parks in a lane in a low-visibility environment on a highway, it is very dangerous. It needs to be detected and warned to the vehicle behind. In the expressway section, infrared pyro-detection technology is used to detect the vehicles staying in the lane in real time. When the vehicle passes through the detection area, the vehicle engine will release a certain amount of heat, and the detectable temperature covers approximately from 120°C to the ambient temperature Consistent interval, according to Wien's displacement law λ m = b T It can be seen that the wavelength range of the heat source covers at least 6-10μm, and the infrared rays with wavelengths between 6μm-10μm are non-dispersive. When the infrared rays pass through the air layer, they will hardly be absorbed by the air, and they can penetrate effectively. The air layer is received by the infrared pyrolysis receiving tube 2-1 installed in the vehicle stay detector 2. Real-time vehicle stay detection divides the infrared receiver into two to three partitions in highway applications, and installs them in a forward manner in which the receiving direction is consistent with the traveling direction of the motor vehicle. Each section points to an angle between the receiving direction and the traveling direction of the vehicle— —Forward angle, each detection area is arranged in the order of forward angle, and there is no overlap between partitions. Referring to Figure 8, this embodiment uses three pyro-receiving tubes 2-1, which are divided into the first detection zone 1 according to three forward angles. # , The second detection zone 2 # , The third detection zone 3 # Wait for three detection areas. When a motor vehicle passes, it will inevitably pass through different detection areas in sequence, and the pyro-receiving tube 2-1 can identify the traveling state of the vehicle. For example, after the vehicle enters the monitoring area, the heat released by the vehicle will be used in the first detection zone 1. # If the vehicle continues to travel, the heat emitted by the vehicle will be in the second detection zone 2 # , The third detection zone 3# The inside is received by their respective pyro-receiving tubes 2-12 and 2-13. After the vehicle drives out of the monitoring area, the heat source generated by the vehicle disappears, and there is no signal in the pyro-receiving tube 2-1 at this time. By detecting the residence time of the heat source in the three detection areas, it can be basically recognized whether the vehicle stays in the monitoring area. Refer to FIG. 12 for the working flow of the vehicle staying detector in the embodiment.
[0044] Due to the technical characteristics of the pyro-receiving tube, when the measured object is completely stationary, the pyro-receiving tube will be in a saturated state. At this time, even if the vehicle stays in the detected area, it will not be found, and it needs to be constantly "shaking" the heat The non-Nie lens in front of the receiving tube makes the heat emitted by the monitored vehicle form an infrared pulse to continuously "activate" the pyro-receiving tube, so that the pyro-receiving tube can continuously output the infrared information of the monitored point. According to this feature, the vehicle staying detector 2 adopts a small conversion point distribution structure on the non-Nie ear lens to refine the refraction points in the lens, adopts a detector head assembly bracket with a spring support structure, and sets a "front motion" device , Using a vibration motor to drive the non-Nie ear lens to "vibrate", so that the pyro-receiving tube can continuously obtain the excitation of the actual heat source and maintain an effective output. If the heat source does not exist, there will be no information output from the detector head even if the "front motion" detector heads, and the "front motion" will only start working when the early warning device is activated.
[0045] In order to avoid interference and improve reliability when used on highways, the pyro-receiving tube 2-1 band chooses to receive infrared rays with a peak wavelength of about 6.5μm and a wavelength of about 7.5μm to 14μm. The receiving interval of PM611 unit pyro-receiving tube and PD632 dual-element pyro-receiving tube is 7.4μm~14μm. According to Wien's displacement law, the heat range emitted by motor vehicles can be effectively intercepted in the above-mentioned receiving area. When the non-Nie lens and high gain processing circuit are used directly, the pyro-receiving tube can receive engine heat at a distance of not less than 80 meters in winter, and it can receive engine heat at a distance of not less than 60 meters in spring and autumn. The receiving effect will be poor when the temperature is high, and the working sensitivity of the pyro-receiving tube will decrease or even fail with the increase of the ambient temperature. The reason is that the receiving wavelength of the pyro-receiving tube covers 6~14μm, and when the ambient temperature is high , The ambient temperature may cover the band below 8.9μm, which is just in the receiving range of the pyro-tube, which will make the pyro-tube in a saturated state. The embodiment solves the problem of sensitivity differences in four seasons, and adopts to increase the receiving temperature point of the pyro-receiving tube to move the receiving wavelength upward. The specific method is to install a silicon wafer or ruby ​​material filter in front of the receiving window of the pyro-receiving tube, and use vacuum coating technology to vacuum spray a layer of infrared filter film on the silicon wafer or ruby ​​substrate. The filter will be higher than the cut-off frequency. The band and the frequency below the specified band are filtered out, so that the infrared band information transmitted by the non-Nie ear lens is limited to 6.5μm~8.6μm before entering the pyro-receiving tube. The temperature covered by this wavelength is much higher than the ambient temperature. Therefore, the change of the ambient temperature will not have a major impact on the sensitivity of the pyro-receiving tube, and the covering temperature is within the temperature range that the motor vehicle can release. In this state, the signal-to-noise ratio is high. The sensitivity of the pyro-receiving tube can be greatly improved, and the interference caused by environmental changes can be effectively overcome.
[0046] The vehicle staying detector 2 also has a vehicle passing detection function. When used in a low-visibility environment, it has the technical conditions to undertake the vehicle passing detection, but when the vehicle passes at high speed, the detection sensitivity is not as good as that of the laser-beamed vehicle passing detector. When the vehicle staying detector 2 does not need to perform additional vehicle position detection, in an application environment with fewer lanes, only one detection zone can be set up, and a pyrolytic effect receiving tube can be used to complete vehicle parking detection on the entire road surface.
[0047] The pedestrian passage detector 3 of the embodiment adopts a microwave detector. When the "black spots" of the cross conflict between people and vehicles are used for conflict warning on ordinary highways, the "double authentication", that is, the microwave and infrared detection technology, can be used to detect mobile people, and the ground-sensing coil can be used to detect motor vehicles. Before pedestrians are about to enter the traffic "black spot" or "blind spot", the early warning device can detect whether there is a traffic conflict, and whether a motor vehicle will enter the "black spot" at the same time, and highlight conflict warnings to the two parties that may conflict. In the "black spot" area, there are usually many uncertain factors for pedestrians, so motor vehicles are usually detected. If the motor vehicle will enter the "black spot", the key direction may exist under the premise of giving the vehicle prompt information. Warning for pedestrians crossing the street. It is usually very effective to use ground-sensing coils to detect motor vehicles in the "blind spot" section. When a motor vehicle is detected before entering the conflict point, corresponding warning information will be given according to the priority traffic conditions.
[0048] The voice communication and broadcasting module 7 of the embodiment includes a voice communication module 7-1 and a broadcasting module 7-2, which adopts an IP communication interface, and the broadcasting module 7-2 adopts a digital recording chip. The voice communication module 7-1 is composed of a set of IP voice communication equipment, which adopts duplex amplifying intercom mode to realize duplex communication with the host computer. The main chip adopts ES3890F 39VF080, etc., and the communication is based on the H.323 protocol; broadcast module 7-2 adopts the voice transmission mode based on the H.323 protocol, based on the working mode of the command telephone. The conventional sound warning is to store the warning sentence in the digital recording chip, which is activated by the main control module 6 when necessary or the voice amplification warning is remotely activated by the host computer through the network. If the actual available bandwidth between the data communication interface 5 and the host computer is greater than or equal to 100K, a digital emergency telephone terminal or one-way amplifying terminal can be connected to the interface to integrate the equipment and communication resources of early warning and emergency telephone. In order to save on-site resources and total investment.
[0049] The road traffic conflict early warning device has the ability to work independently and to work collaboratively in networking. For this reason, the road traffic conflict early warning device is equipped with a communication interface that meets the requirements of field applications. The data communication interface 5 of the embodiment is equipped with a digital wireless communication interface and an RS485 interface. The digital wireless communication interface is mainly responsible for realizing a simple functional connection with the upper control system. Through this interface, the early warning device can be started, shut down, and local functions are turned on; it can form a full-featured connection with the upper control equipment through the RS485 interface. In the mode, all functions of the road traffic conflict early warning device can be controlled by the host computer. The vehicle traffic and vehicle staying conditions detected by the vehicle through the detector 1 and the vehicle stay detector 2 can be transmitted to the host computer through the communication interface, and the host computer can also You can download the text information content that needs to be displayed and start the sound warning.
[0050] The road traffic conflict early warning device can be powered by solar energy or use city power. In the embodiment, the power source uses 20W polycrystalline silicon solar photovoltaic panels as the power source, and 36AH, 12V maintenance-free batteries are used as energy storage devices. Photovoltaic panels use a solar synergist to synergize photovoltaic cells. The efficiency of the processed 20W solar photovoltaic cells is equivalent to 30-35W photovoltaic cells; when the 36AH configuration is used, the early warning device can continue to work for a long time in cloudy and rainy days. The charge management and discharge management of the solar power source are both completed by the main control module 6.
[0051] The main control module 6 of the embodiment is connected to the self-reset button, press the self-reset button to manually turn on the warning device, and press the self-reset button again to turn off the warning device. The function of the self-reset button is mainly that the driver of the vehicle can manually turn on the warning device to strengthen the display of the warning when the warning device is not activated after the vehicle is stopped by a fault. The warning device can be remotely shut down or reset, or it can be shut down on the spot. After the warning device is manually turned on, the information that the warning device was manually turned on will be sent to the command center through the data communication interface 5. This information is equivalent to alarm information and can also be redefined as needed, such as rescue requests. The main control module 6 uses the LPC900 series microprocessor to manage the work of the various components of the road traffic conflict early warning device. It also manages the work of the power supply 11, laser emission, environmental illumination detection, forward warning device 10, and backward warning device 9 at the same time.
[0052] The circuit principle of the main control module 6 of the embodiment is shown in Fig. 10, voice communication module 7-1, broadcast module 7-2, digital wireless transmission module 102-3, data communication interface 5, power management module 11-1, rear and forward The driving circuits 8-1 and 8-2, the embedded microwave detection vehicle passing detector 103 are all connected to the main control module 6 including the decoder, the power supply 11 and the power management module 11-1, the backward driving circuit 8-1, The forward drive circuit 8-2 and the embedded microwave detection vehicle are connected through the detector 103, the main control module 6, the voice communication module 7-1, the broadcast module 7-2, and the digital wireless transmission module 102-3. The main control module 6 is installed in the main control box of the housing of the early warning device, and the solar panels are installed on the top of the front and rear displays. The independent installation of the microwave detection vehicle transmits real-time data through the built-in wireless through the detector 102, and the wireless module that the microwave detection module sends data to the main control module 6 adopts a 315M digital wireless transmission module and 4-bit encoding, and the main control module 6 is installed independently The wireless module sent by the microwave detection vehicle through the detector 102 uses a 433M wireless transmitting module. In this embodiment, the NRF403 type 315/433MHZ dual-segment single-chip wireless transceiver chip of Shenzhen Shangstar Industrial Co., Ltd. is used as the core device of the digital wireless transmission module 102-3 to complete the main control module 6 and the independent installation of the microwave detection vehicle passing detector 102. Two-way communication. The wired data communication interface 5 adopts the RS485 bus structure, and all the data connections between the components of the early warning device are completed through the bus. The power management module 11-1 mainly completes charge and discharge management when using solar cells, and is responsible for floating charge management of the backup battery when using city power.
[0053] The internal circuits of the modules used in the embodiments all adopt well-known technologies in the industry.
[0054] Refer to Fig. 13 for the working process of the road traffic conflict early warning device of the embodiment.
[0055] The road traffic conflict early warning device of the present invention has its own independent and unique address during operation to identify its location and attributes in the entire road traffic management system. In highway applications, the automatic opening condition of the early warning device is to have both the low visibility of the environment and the detection of a vehicle passing by. When the two conditions are met, the main control module 6 then detects the environmental illuminance, and then turns on the warning device. And adjust the brightness of the light-emitting device of the warning device according to the environmental illuminance; when applied to the "black spot" area, the starting condition of the warning device is that there is a conflict condition, such as having two vehicles entering the conflict point at the same time or possible conflict between people and vehicles. The road traffic conflict early warning device has a networked interface, which can be connected to the upper unit network. When the upper computer needs to turn on the early warning device according to the overall requirements, the warning device can be directly driven through the network to turn on, or only the warning sign or text can be turned on; the upper computer can pass through the network The interface can also only open the vehicle through the detector 1 to read the traffic condition of the detected road section; the early warning device can also be manually turned on by the self-reset button on the spot and send the warning graphic sign to the warning device 9. When the visibility is higher than the threshold, the main early warning condition disappears, the main control module 6 issues an early warning device shutdown instruction, the early warning device will be turned off, that is, the entire early warning device is in the closed state, and the vehicle passes the detector 1, the forward warning device 10 and the rear The components such as the direction warning device 9 stop working, but the main control module 6 is still in working state. The early warning device will resume standby in the following two situations: First, when it is in a low visibility state and a vehicle passes by, the next early warning device detects that a vehicle has passed, and the next early warning device will release the previous early warning device through the network. , At this time, the early warning device returns to the standby state; second, after a specified time after the heat source received by the pyro-receiving tube 2-1 of the early warning device disappears, no heat source signal is received in the monitoring area again, the early warning device Switch to the standby state, and the specified time can be parameterized. In this embodiment, a delay of 30 seconds is adopted. Standby state means that the front and rear warning signs in the warning device are turned off, but the test components such as the vehicle passing detector 1 are still working, waiting for the next vehicle to pass, and the warning signs will return to the working state when a new vehicle passes; Allows parameterization of the conditions for transition to standby.
[0056] Operation process of road traffic conflict warning device:
[0057]When the early warning device is activated, the vehicle passing through will block the modulated laser signal of the opposite beam. The vehicle passing detector 1 can detect the passing vehicle. The vehicle passing detector 1 does not distinguish how many vehicles pass the detection area. It only detects whether the vehicle passes through the detection area. When a car passes through the detection area, the heat generated by the vehicle will be detected by the pyro-receiving tube 2-1 in different zones. The signal output by the pyro-receiving tube 2-1 will describe that the vehicle is passing through the monitoring area, and the forward warning will be activated at this time The indicator 10, if it is at night, the forward warning indicator 10 will focus the strong light to the rear of the vehicle that has just passed. The strong light will form a light and shadow in the low-visibility space to give a more prominent warning to the following vehicle; The device 9 starts synchronously, and it will display warning patterns and warning sentences to the vehicles behind, for example: "There is a car 50 meters ahead, please slow down." When the early warning device is in networked operation, the operating conditions and starting parameters of two or more early warning devices can be personalized. For example, when there is no vehicle behind or when the vehicle is far away from the preceding vehicle, the early warning device may not be activated. The brightness, color, reflection angle, display wavelength and other parameters of the early warning information sent by the early warning device are controllable. During network operation, when the vehicle ahead and the vehicle behind are close, a temporary prohibition sign can be issued. The current vehicle distance When it is far away, it can send out decelerating traffic information. In order to increase the backward warning capability of the backward warning device 9, when a vehicle passes in front and the following vehicle is close to the preceding vehicle, the backward warning device 9 will flash at a faster frequency, and the supporting numerical control spikes will be activated at the same time , Numerical control contour marking and other road contour display devices to remind the vehicle to pay attention to the front and slow down to avoid collision. When the early warning device meets the standby conditions, it switches to standby. After the vehicle in front passes, the early warning device can leave an early warning belt no less than 50 meters or 100 meters behind the vehicle ahead with the vehicle. The early warning belt includes numerical control spikes, warning signs, numerical control contour markings, etc. When the vehicle density is high, the early warning device will work continuously to warn the following vehicles; when the vehicle is parked in the early warning zone, the backward warning device 9 of the early warning device will flash quickly and change the warning statement until it works The condition disappears or the warning device is turned off.
[0058] The application of the road traffic conflict early warning device of the present invention can provide the following vehicle with the approximate position information of the preceding vehicle under low visibility conditions. The forward and backward early warning can prompt the vehicles driving in the low visibility environment to indicate the road conditions ahead, so that subsequent vehicles have time Take measures in advance to avoid rear-end collisions, prevent traffic accidents, and ensure driving safety; early warning devices can work with relevant controlled multi-color spikes, contour signs, guide signs and other anti-collision devices to increase highway visibility under low visibility conditions Driving early warning capability; it can provide targeted warning information for pedestrians and motor vehicles entering the "black spot" and "blind spot" areas of road traffic; in the case of extremely low visibility or other needs, the early warning device is issued to the following vehicles It can be seen that in addition to the early warning signals, it can also send out sound warning signals to strengthen the early warning effect.
[0059] The road traffic conflict early warning device of the present invention is used at the entrance of expressways and tunnels as an anti-collision early warning in a low-visibility environment, and the effect is remarkable.
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Description & Claims & Application Information

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