CN217008413U

CN217008413U - External countdown device based on power line carrier PLC real-time communication

Info

Publication number: CN217008413U
Application number: CN202122389436.2U
Authority: CN
Inventors: 曾维富; 杜谦; 徐侃
Original assignee: Shenzhen Jinguangdao Intelligent Transportation Co ltd
Current assignee: Shenzhen Jinguangdao Intelligent Transportation Co ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-07-19
Anticipated expiration: 2031-09-29

Abstract

The utility model relates to the technical field of road traffic facilities, and discloses an external countdown device based on power carrier PLC real-time communication. The road traffic signal countdown device adopts the power line carrier PLC for real-time communication, realizes the function of real-time communication countdown under the condition of not additionally arranging a communication cable and changing any facility of the existing traffic intersection, only needs to increase the external countdown device, reduces the construction cost, meets the requirement of displaying countdown in real time, and enlarges the application range.

Description

External countdown device based on power line carrier PLC real-time communication

Technical Field

The utility model relates to the technical field of road traffic facilities, in particular to an external countdown device based on power line carrier PLC real-time communication.

Background

At present, the urban modernization of China is rapidly developed, the development of traffic facilities needs to be increased, most of the existing old traffic intersections only have traditional traffic signal lamps, corresponding indicator lamp countdown lamps are not arranged, effective pedestrian and traffic flow control and dispersion are lacked, and much inconvenience is brought to the passing of motor vehicles and pedestrians.

The existing old signal lamp intersection is modified, a new countdown lamp needs to be installed again, a pavement is excavated and a cable is laid in the traditional scheme, the engineering quantity is large, the construction cost is increased by repeated construction, and the operability is low.

The other scheme is that a learning type countdown lamp is installed without laying cables again, but the learning type countdown lamp has the defect that the principle of the existing learning type countdown lamp is to detect the power-on time of each lamp of a traffic signal lamp, to detect and display after stability, and only can be used under the condition of a fixed period, namely, the intersection only runs one scheme all day long, the countdown and the lamp color are asynchronous due to the periodic change of the lamp color, the normal display cannot be realized, and obviously, the learning type countdown lamp cannot be applied to the intelligent intersection with the functions of intelligently detecting flow and releasing at different time periods. Under the condition that the traffic flow is increased day by day, the appearance of intelligent intersections is increased, and under the condition that the construction cost is not increased additionally, a real-time communication display countdown function is added to a signal lamp to become a necessary measure.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an external countdown device based on power line carrier PLC real-time communication, which aims to solve the problems that cables need to be laid again, lamps need to be arranged to transmit countdown data and the learning countdown disadvantage is overcome in the conventional traffic intersection transformation.

In order to achieve the purpose, the utility model adopts the following technical scheme: an external countdown device based on power carrier PLC real-time communication comprises a wiring terminal module 1, a switching power supply module 2, a voltage sampling module 3, a power carrier PLC module 4, a main control unit module 5, a display driving module 6, a display unit module 7 and an outer case 8; the switch power supply module 2 is connected with the voltage sampling module 3, the power carrier PLC module 4, the main control unit module 5, the display driving module 6 and the display unit module 7 through a wire set to supply power for each module; the voltage sampling module 3 is connected to the terminal module 1 for taking voltage and PLC communication data, and the voltage sampling module 3 can also sample and analyze the taken PLC communication data and transmit the sampled PLC communication data to the power carrier PLC module 4; the power carrier PLC module 4 communicates with one end of the main control unit module 5 through a Uart serial port, and transmits the current running light color condition and countdown data to be sent to the main control unit module 5; the display driving module 6 is connected to the other end of the main control unit module 5 and the display unit module 7, and drives and outputs display logic of data operation and logic analysis of the main control unit module 5 to the display unit module 7 to display real-time countdown data.

Furthermore, the external countdown display screen based on the power carrier PLC real-time communication is an external countdown display screen, the principle is dot-matrix LED display, and only the external countdown device is additionally arranged, so that countdown and signal lamp display are separated, and the display is more visual.

Furthermore, the voltage taken by the wiring terminal module 1 of the external countdown device based on the power carrier PLC real-time communication directly comes from the existing traffic signal lamp set, and a cable does not need to be additionally arranged.

Further, external countdown device based on power line carrier PLC real-time communication comprises red, green, yellow three kinds of colour lamp pearls, and a display screen can show corresponding red light, green light, yellow light count-down time.

Further, display element module 7 of external count-down device based on power line carrier PLC real-time communication comprises four LED display screens, and maintenance easy dismounting, module satisfy IP67 level waterproof dustproof requirement, can stably carry out outdoor operation.

Furthermore, the switch power supply module 2 of the external countdown device based on the power carrier PLC real-time communication is a rated 300W isolating switch power supply, has high power, stable performance, safety and reliability, and passes various EMC and EMI experimental certifications.

Furthermore, the count-down number displayed by the external count-down device based on the power carrier PLC real-time communication can be adjusted according to the display digit.

Furthermore, the main control MCU adopted by the external countdown device based on the power carrier PLC real-time communication is an industrial ARM structure chip, and has the advantages of rich algorithm, strong computing capability, strong anti-interference capability and stable performance.

Furthermore, the outer box 8 of the external countdown device based on the power carrier PLC real-time communication is made of an aluminum alloy material, so that the external countdown device is light in weight, rust-proof and corrosion-proof; the wiring terminal module, the switching power supply module, the voltage sampling module, the power carrier PLC module, the main control unit module, the display driving module and the display unit module are all installed in the outer case.

Compared with the prior art, the utility model provides the external countdown device of the LED module based on the power carrier PLC real-time communication, which has the following beneficial effects:

the device does not need to be re-wired, and utilizes the power line of the existing traffic light to reduce the construction amount and control the repeated cost through power carrier communication; the countdown external mode is adopted, and the signal lamp and the countdown device are separately arranged without replacing; the countdown device is separately displayed with the signal lamp, takes the signal lamp as a main part, takes the countdown device as an auxiliary part, and operates without interfering the display of the signal lamp; if the external countdown device is damaged in the using process, the use of the signal lamp is not influenced; the countdown display screen is provided with yellow, green and red lamp beads and can display countdown numbers of the corresponding three lamps; the countdown digital display position is adjusted according to the digit of the digital display, so that the displayed digit is always displayed in the middle, and the countdown digital display has more attractive and clear effect compared with the old traditional countdown; compared with the traditional countdown method, the external countdown device combined with the signal lamp has the advantages that the total volume is reduced, the weight is reduced, and the installation is facilitated; the display screen adopts the LED modular design, only the corresponding module needs to be replaced when the fault maintenance is carried out, the whole display screen does not need to be replaced, and the maintenance is convenient; the device overcomes the defects of the existing learning signal lamp, is suitable for the intelligent intersection transformed aiming at the complex road condition, realizes real-time communication, and does not have the condition of delayed display any more.

The device has the advantages that the device has the same parts as the prior art or can be realized by the prior art, only a countdown screen needs to be added under the condition of not changing the infrastructure of the prior traffic intersection, and countdown data are transmitted by utilizing electronic carrier waves, so that the prior intersection has a countdown function, the defect of learning countdown is improved, and the device has strong practicability.

Drawings

Fig. 1 is a block diagram of an external countdown device based on power carrier PLC real-time communication according to the present invention;

fig. 2 is a main circuit block diagram of an external countdown device based on power carrier PLC real-time communication according to the present invention;

fig. 3 is a logic block diagram of a program of the external countdown device based on the PLC real-time communication.

In the figure: 1-a terminal module; 2, switching a power supply module; 3-voltage sampling module is fast; 4-power line carrier PLC module; 5-a main control unit module; 6-display driving module; 7-a display unit module; 8-outer chassis; 51-a rectifying circuit; 52-surge suppression circuitry; 53-signal processing circuitry; 54-address dialing circuit.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-3, the external countdown device of the LED module based on the power carrier PLC real-time communication is configured to, on the basis of an existing intersection, obtain 220V voltages of red light, green light, yellow light signals and carrier PLC communication data from an existing traffic signal lamp, connect to a terminal module 1 of a display screen, and be connected to a switching power supply module 2 and a voltage sampling module 3 through the terminal module 1 in a switching manner to provide 220V commercial power to the two modules; the switch power supply module 2 limits the impact current input instantly when the power supply is switched on, feeds back clutter existing in a filtering power grid and the filtering power grid to a circuit, rectifies alternating current into smooth direct current by combining a rectifier and a filter, further carries out a series of processing such as negative feedback and DC-DC (direct current-direct current), outputs stable 5V voltage, and supplies power to the voltage sampling module 3, the power carrier PLC (programmable logic controller) module 4, the main control unit module 5, the display driving module 6 and the display unit module 7; the voltage sampling module 3 acquires a voltage sampling signal and countdown PLC communication data from the wiring terminal module 1, and transmits the sampled voltage to the power carrier PLC module 4 after voltage reduction processing; the power carrier PLC module 4 processes the received carrier communication signal and converts the carrier communication signal into TTL serial port communication data which can be received by the master control MCU, thereby achieving data transmission with the existing traffic signal controller; the main control unit module 5 comprises a rectification circuit 51, a surge suppression circuit 52, a signal processing circuit 53 and an address dial circuit 54, the main control unit module 5 is in serial port communication with the power carrier PLC module 4, receives countdown data and voltage sampling signals, performs internal logic processing and a series of operations of an AMR framework CPU, and is in communication connection with the display driving module 6; the display driving module 6 receives the data sent by the main control unit module 5, and drives the LED screen to display countdown data corresponding to the light color through a driving chip of the display driving module; furthermore, for intersections with different requirements, the address dial circuit of the main control unit module 5 can be provided with different codes and matched with the receiving and transmitting module, so that the signal anti-interference capability is improved.

Through the structural arrangement, the principle of a communication type function is realized, namely, the traffic signal controller communicates through the power carrier PLC module 4 provided by the utility model and reflects the communication on the countdown display screen, the communication feedback interval can be once a second, and the communication can also be carried out when the states of the signal lamps are switched, so that the synchronous display of the countdown display screen and the states of the signal lamps is realized.

Referring to the attached drawing, the color and the countdown time displayed by the external countdown are consistent with the color and the remaining time of the signal, the current traffic light remaining time of the pedestrians and the drivers is prompted, and the passing preparation is made.

The countdown display screen is driven by the dot matrix module, the display brightness and the display digit size are realized, the digit position can be adjusted according to the actual condition, and the countdown display is softer and clearer than the conventional countdown display.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. An external countdown device based on power carrier PLC real-time communication is characterized by comprising a terminal module (1), a switch power supply module (2), a voltage sampling module (3), a power carrier PLC module (4), a main control unit module (5), a display driving module (6), a display unit module (7) and an outer case (8); the switch power supply module (2) is connected to the voltage sampling module (3), the power carrier PLC module (4), the main control unit module (5), the display driving module (6) and the display unit module (7) through a wire set and supplies power to the modules; the voltage sampling module (3) is connected to the terminal module (1) and used for acquiring voltage and PLC communication data, and the voltage sampling module (3) can also sample and analyze the acquired PLC communication data and transmit the sampled PLC communication data to the power carrier PLC module (4); the power carrier PLC module (4) communicates with one end of the main control unit module (5) through a Uart serial port, and transmits the current running light color condition and countdown data to be sent to the main control unit module (5); the display driving module (6) is connected to the other end of the main control unit module (5) and the display unit module (7) and drives and outputs display logic of data operation and logic analysis of the main control unit module (5) to the display unit module (7) to display real-time countdown data.

2. The external countdown device based on the power carrier PLC real-time communication of claim 1, wherein: the terminal module (1) is further connected to an external traffic signal lamp, and 220V alternating current voltage of the existing traffic signal lamp is converted and output into 5V direct current voltage through the switching power supply module (2) to be supplied to the external countdown device.

3. The external countdown device based on the power carrier PLC real-time communication of claim 1, wherein: the display unit module (7) is a dot matrix countdown three-color lamp set which is correspondingly displayed with the connected traffic signal lamp.

4. The external countdown device according to claim 3, wherein the external countdown device is configured to perform PLC real-time communication based on a power carrier: the display unit module (7) is formed by splicing four LED display screens.

5. The external countdown device based on the power carrier PLC real-time communication of claim 4, wherein: the size of the countdown digits displayed by the display unit module (7) can be adjusted according to the display digits.

6. The external countdown device based on the power carrier PLC real-time communication of claim 1, wherein: the main control unit module (5) comprises a rectifying circuit (51), a surge suppression circuit (52), a signal processing circuit (53) and an address dial circuit (54).

7. The external countdown device based on power carrier PLC real-time communication of claim 1, wherein: the outer case (8) is made of an aluminum alloy material, and the wiring terminal module (1), the switching power supply module (2), the voltage sampling module (3), the power carrier PLC module (4), the main control unit module (5), the display driving module (6) and the display unit module (7) are all installed in the outer case (8).