CN113421446B - Green lamp intelligent voice prompter - Google Patents
Green lamp intelligent voice prompter Download PDFInfo
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- CN113421446B CN113421446B CN202110611932.XA CN202110611932A CN113421446B CN 113421446 B CN113421446 B CN 113421446B CN 202110611932 A CN202110611932 A CN 202110611932A CN 113421446 B CN113421446 B CN 113421446B
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/091—Traffic information broadcasting
- G08G1/094—Hardware aspects; Signal processing or signal properties, e.g. frequency bands
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/04—Detecting movement of traffic to be counted or controlled using optical or ultrasonic detectors
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/096—Arrangements for giving variable traffic instructions provided with indicators in which a mark progresses showing the time elapsed, e.g. of green phase
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
- H04R1/028—Casings; Cabinets ; Supports therefor; Mountings therein associated with devices performing functions other than acoustics, e.g. electric candles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/02—Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
- H04R2430/01—Aspects of volume control, not necessarily automatic, in sound systems
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Traffic Control Systems (AREA)
Abstract
Green light intelligence voice prompt, its characterized in that: the intelligent sensing control system comprises a shell loudspeaker, a circuit board, a central processing unit chip, an intelligent sensing control receiving module when east, west, south and north green lights are on, a time recording display module for setting the east, west, south and north green lights to be turned on, and an image noise sensing control loudspeaker voice output module; the upper loudspeaker and the lower loudspeaker are arranged in front of the shell, and the circuit board is arranged at the middle end of the right side in the loudspeaker of the shell; the central processing unit chip is arranged on the surface of the circuit board, and the intelligent sensing control receiving module of the east-west south green light is arranged at the lower end of the right side of the shell loudspeaker; the time recording display module is arranged at the upper end of the left side of the shell loudspeaker when the east-west south-north green lamps are turned on; and the image noise sensing control loudspeaker voice output module is arranged at the lower end of the right side in the shell loudspeaker. The invention has the functions of helping blind people, old people, high-altitude amblyopia and other visually impaired people to prompt cross, T-shaped, green light opposite to pedestrian crossing to display the countdown remaining seconds in the whole process, avoiding traffic accidents and personal injuries caused by running red light, and ensuring the smoothness of vehicles passing through the traffic lights.
Description
Technical Field
The invention relates to a green light intelligent voice prompter in the field of clear information, wherein the green light intelligent voice prompter is used for blindness, color blindness, low-vision old people, short-distance and amblyopia visually handicapped people and the like to count down the green light display on the opposite side without looking clear road, and can prompt that the passing is forbidden when the residual time of east-west green lights and south-north green lights is not enough to cross zebra crossing and ensure that vehicles pass through the green light.
Background
In the national standard GB14887-2011 "road traffic signal lamp", article 5.12 specifies that a road traffic signal lamp may be equipped with a blind street crossing sound prompting device to emit street crossing prompting sound or voice in a green light signal period of a crosswalk signal lamp, and the sound should have directivity toward a crosswalk line.
For years, the old people with blind people, color blindness and low eyesight, the old people with short-range height, amblyopia and other vision-impaired people cannot clearly see the green light opposite to the cross, the T-shaped light and the zebra crossing in the midway, the green light is displayed for counting the remaining seconds, the old people still just starts after walking to the crossing and seeing the opposite green light, and the old people still moves to the zebra crossing and switches the green light into the red light, so that the blind people, the old people, the short-range height, amblyopia and other vision-impaired people can only run the red light to cross the road, the normal barrier-free traffic of social city vehicles is seriously hindered, the time for the traffic is greatly wasted, traffic accidents are easily caused, and personal injuries are caused to the blind people, the old people with low eyesight, the short-range height, the amblyopia and other vision-impaired people. Therefore, in order to ensure the safety of the blind, the color blindness, the old with low vision, the short-distance and amblyopia and the like, and reduce the passing time of the vehicles passing through the cross, the T and the midway zebra crossings, the drop-shaped voice is set to be fast in the cross, the T and the midway zebra crossings, the east and west direction green light of voice broadcasting is requested to pass, and the drop-shaped voice is set to be slow in the cross, the T and the midway zebra crossings, the south and north direction red light of voice broadcasting is prohibited to pass in various cities at home and abroad. The problem that the blind, the color blind, the old with low vision, the old with short height, the amblyopia and other visually impaired people accurately know the remaining seconds of countdown of the green light display opposite to the cross, the T character and the midway zebra crossing is still solved by the voice broadcast, so that the blind, the color blind, the old with low vision, the old with short height, the amblyopia and other visually impaired people still run the red light to forcibly cross the road, and the blind who is blind and blind cannot pass the green light in the south and north directions and the red light in the east and west directions is prohibited from passing the road, and mixed noise is broadcast, so that the blind who is blind can distinguish the green light prompt.
Disclosure of Invention
The invention aims to provide a method for avoiding the risks of traffic accidents and personal injuries caused by the fact that the normal traffic of vehicles is inevitably obstructed when a red light is forcedly run by a blind person, an old person with color blindness and low vision, an old person with short-range height, an amblyopic person and other visually-impaired persons who see cross, T characters and a green light display countdown opposite to a zebra crossing in midway without being clear, and the blind person, the old person with color blindness and low vision, the old person with short-range height, the amblyopic person and the like.
The green light intelligent voice prompter is characterized in that: according to the principle that a red light stops and a green light goes, a unique central processing unit chip in a shell loudspeaker is designed to receive and process other modules, then send out an instruction and control the east-west and north-south green lights to be on, and when the green lights are on, the central processing unit chip circularly prompts the blind, the color blind and the old with low vision, the visually impaired people with near height, amblyopia and the like, the east-west and north-south green lights are on to pass, the east-west and north-south green lights are on for 10 seconds and 20 seconds, the east-west and north-south green lights are on to pass, the left 30 seconds of the east-west and north-south green lights are fast to walk, the young people are fast to pass, the old and the disabled people with slow walking pass next, and the left 10 seconds of the east-west and north-south green lights are forbidden to pass. When a pedestrian forcibly runs the red light at the entrance of the east-west zebra crossing and the south-north zebra crossing, the loudspeaker immediately raises the volume by one time to warn the pedestrian not to run the red light, and when no pedestrian runs the road at night and the entrance of the zebra crossing, the prompt sound for controlling the loudspeaker is in a closing mode, when the pedestrian passes the east-west zebra crossing and the south-north zebra crossing, the loudspeaker is started to prompt the green light in a voice mode, and the volume of the loudspeaker is automatically raised or reduced according to the noise of the crossing, so that the personal safety of the blind, the old, the high-near and amblyopia and other visually impaired people is guaranteed, the barrier-free passing efficiency of the urban traffic vehicle when the urban traffic vehicle passes the green light is improved, the vehicle passing time is effectively saved, and the construction of a smart city and the development of social economy are facilitated.
The green light intelligent voice prompter is characterized in that: compared with the existing technologies of crossing things, crossing north and south, crossing T, crossing zebra crossing entrance red light, lifting the brake bar, continuously playing countdown figures for 10 seconds, playing beep-off sound quickly and green light for 5 seconds, broadcasting things and green light in south and north directions, asking for passage of green light in east and west, crossing north and south, crossing T, crossing zebra crossing and crossing blinker in midway, stopping passage of red light in east and west in voice broadcasting, and requiring eight voice broadcasting devices at a crossroad, the outstanding substantive characteristics of the invention are that one crossroad only needs four intelligent voice prompters with green lights, when a pedestrian forcibly runs the red light, the speaker immediately increases the volume twice, and warns the pedestrian not to run the red light for 2 times continuously, in order to reduce noise disturbance and automatically raise or lower the prompting sound of the speaker according to the noise of the crossroad, when no person passes through the road at night and at the entrance of the zebra crossing, the prompting sound for controlling the loudspeaker is in a closing mode, when a pedestrian passes through the east and west, and the green light of the zebra crossing at the north and south, the loudspeaker starts to carry out voice prompt on the green light, so that the blind, the old with color blindness and low vision, the blind with near height, the amblyopia and the like can know how many seconds remain after the blind, the T-shaped and the old across the zebra crossing at the entrance, the danger of traffic accidents caused by red light running can be avoided, the personal safety of the blind, the color blindness, the old with low vision, the blind with near height, the amblyopia and the like when the blind passes through the red light can be obviously ensured, the speed of the urban barrier-free vehicles passing through the green light can be effectively improved, the time of the urban vehicles passing through is greatly saved, the interference of the blind caused by simultaneous broadcasting of the east-west-red light and north-south green light can be avoided, the blind can accurately hear and clear the east-west-red light, and east-north-west-green light can be heard, and things can be clearly, Prompting by south-north green lights.
The technical scheme of the invention is as follows: the upper loudspeaker and the lower loudspeaker are arranged in front of the shell, the circuit board is arranged at the middle end of the inner right side of the loudspeaker of the shell, and the upper end of the inner right side of the loudspeaker of the shell is provided with an external image, solar energy, a traffic light power supply, a signal wire, a circuit board, a central processing unit chip, an image and solar energy input power signal wire connector and a wireless signal receiver.
The CPU chip is arranged on the surface of the circuit board and used for receiving the processing signal and sending a working instruction to other modules.
The intelligent sensing control receiving module is arranged at the lower end of the right side in the shell loudspeaker when the east-west green light and the south-north green light are on and used for detecting the information of a plurality of lanes, crosses, T-shaped, midway zebra crossing lines, how many seconds the south-north traffic lights are on, how many meters the distance between the east-west traffic lights and the south-north traffic lights is, the time required by the young people to cross the zebra crossing, the time required by the old people and the disabled people to cross the zebra crossing and the like, and the time required by the old people and the disabled people who walk slowly to cross the zebra crossing at the crossing is automatically processed and calculated after being received by the central processing unit chip and displayed on the display screen arranged on the display module for timing when the east-west south-north green lights and the south-east-west light are turned on.
The invention sets an east-west green light turn-on countdown display module, a south-north green light turn-on countdown display module, a left-side upper end of a shell loudspeaker and a central processing unit chip, and is used for receiving a central processing unit chip to automatically process and calculate the time required by old people walking slowly, old people walking slowly and disabled people crossing the zebra crossing, and input the time into the processor chip through an add-subtract button on a display screen of the module The left south-north green light is 40 and 30 seconds, the old and the disabled walk quickly, the old and the disabled walk slowly for the next time, the east-west green light and the south-north green light are 20 seconds, the old and the disabled walk quickly, the young are ready to walk, the old and the disabled walk slowly for the next time, and all the people are prohibited from passing after 10 seconds.
The voice output module of the image noise sensing control loudspeaker is arranged at the lower end of the left side in the loudspeaker of the shell, when a pedestrian is sensed to run a red light by an infrared detection sensor and a zebra crossing camera monitoring the east-west direction and the south-north direction in the voice output module, the central processing unit chip sends an instruction to the voice output module of the image noise sensing control loudspeaker, so that the voice prompt of the loudspeaker to the green light is suspended, the volume of the loudspeaker is increased by one time, and after the pedestrian is continuously warned not to run the red light for 2 times, the central processing unit chip sends the instruction to the voice output module of the image noise sensing control loudspeaker, and the normal voice prompt of the loudspeaker to the green light is recovered. When no person crosses the road at night and at the entrance of the zebra crossing, the central processing unit chip sends an instruction to the image noise sensing control speaker voice output module to enable the prompt tone of the speaker to be in a closed sleep mode, and no matter at any time, the infrared detection sensor and the monitoring camera in the image noise sensing control speaker voice output module shoot the things, the south-north cross, the T and the midway zebra crossing to enable the speaker to circularly give out the instructions to the image noise sensing control speaker voice output module to enable the speaker to circularly prompt the things, the 20 seconds to pass, the things, the south-north green lamps to leave 30 seconds to go fast, the young people to pass, the old with slow walking, the people to pass next time, the things, the south-north green lamps to leave 20 seconds to go fast, the young people to pass, the south-north-south green lamps to light to start passing, the things, the disabled people to pass, The south and north green lights are turned on for 10 seconds to please pass, the east and west green lights are turned on for the old and the disabled to pass next time, and the east and west green lights and the south and north green lights are left for 10 seconds and all people are prohibited to pass. When the vehicles at the crossroad, the T-shaped vehicles and the midway zebra crossing are too many, the personnel are too much and the noise is too high, the central processing unit chip sends an instruction to the image noise sensing control loudspeaker voice output module to enable the image noise sensing control loudspeaker voice output module to automatically improve the prompt tone of the loudspeaker, and when the vehicles at the crossroad, the T-shaped vehicles and the midway zebra crossing are too few and the noise is too low at night, the central processing unit chip sends an instruction to the image noise sensing control loudspeaker voice output module to enable the image noise sensing control loudspeaker voice output module to automatically reduce the prompt tone of the loudspeaker.
Drawings
The invention is further described in detail below with reference to the embodiments provided in the drawings.
Fig. 1 is a schematic diagram of the appearance structure of the present invention.
FIG. 2 is a schematic view of the internal structure of the present invention.
Detailed Description
In the attached drawing, an upper loudspeaker and a lower loudspeaker are arranged in front of a shell (1), a circuit board (2) is arranged at the middle end of the inner right side of the shell loudspeaker (1), an external image, solar energy, a red-green light power supply signal wire and a circuit board, a central processor chip input power supply signal wire connector and a wireless signal receiver are arranged at the upper end of the inner right side of the shell loudspeaker (1), an input power wire of a central processor chip (3) is connected with an output power wire (2) of the circuit board and then arranged on the surface of the circuit board (2), an intelligent sensing control receiving module (4) inputs power when an east-west-south-north green light is on, a signal wire and a central processor chip (3) output power supply of the circuit board (2) are arranged at the lower end of the inner right side of the shell loudspeaker (1) after the signal wire is connected, an input power supply of an east-west-south-north-green light turn-on countdown display module (5), a signal wire and an output power supply of the central processor chip (3) of the circuit board (2) are arranged, The signal line is connected and then installed at the upper end of the left side in the shell loudspeaker (1), the image noise sensing control loudspeaker voice output module (6) is connected with the input power supply of the shell loudspeaker (1), the signal line and the circuit board (2) are connected and then installed at the lower end of the left side in the shell loudspeaker (1), the shell loudspeaker faces to the cross, the T shape, the middle of the midway zebra crossing, the round sleeve is installed below the bottom of the shell loudspeaker, the round sleeve is sleeved on the support rod which is erected between the cross, the T shape, the midway zebra crossing east and west and the south and north traffic lights and then fixed by a screw rod, the top of the shell loudspeaker is provided with a sun and rain protective cover, the top of the protective cover is provided with a solar panel, 2 cameras for monitoring the east and west and south directions and passing the zebra crossing entrance are installed on the side face of the solar panel, and the green light intelligent voice prompter is used for annotating (the intelligent voice prompter capable of automatically installing cameras), The intelligent voice prompting device can also be directly connected with a camera for monitoring the zebra crossing in the east-west and south-north directions through signals, and can be used for transmitting a signal to an intelligent voice prompting device (the intelligent voice prompting device can adopt a wireless signal receiver or be directly connected with an outdoor monitoring camera and a traffic light signal), and can be used for transmitting power (the intelligent voice prompting device can adopt solar energy or be directly connected with an outdoor traffic light power supply).
Claims (1)
1. The utility model provides a green light intelligence voice prompt which characterized in that: the intelligent sensing control system comprises a shell loudspeaker, a circuit board, a central processing unit chip, an intelligent sensing control receiving module when east-west south-north green lamps are on, a time recording display module when east-west south-north green lamps are set to be turned on, and an image noise sensing control loudspeaker voice output module;
the upper loudspeaker and the lower loudspeaker are arranged in front of the shell (1), the circuit board (2) is arranged at the middle end of the inner right side of the shell loudspeaker (1), and the upper end of the inner right side of the shell loudspeaker (1) is provided with an external image, solar energy, a traffic light power supply, a signal line and circuit board, a central processing unit chip, an image, a solar energy input power supply signal line connector and a wireless signal receiver;
the central processing unit chip (3) is connected with an input power line of the circuit board (2) and then is installed on the surface of the circuit board (2) and used for receiving and processing other modules and then sending out working instructions;
when the east-west, south-north green lights are on, the intelligent sensing control receiving module (4) inputs a power supply, a signal line and a circuit board (2) central processor chip (3) outputs a power supply, the signal line is connected and then installed at the lower end of the right side in the shell loudspeaker (1) and is used for detecting that the east-west roads, the south-north roads have a plurality of lanes, crosses, T-shaped roads, midway zebra crossing east-west roads, south-north traffic lights are on for a plurality of seconds, the distances between the east-west traffic lights and the south-north traffic lights are a plurality of meters, the walking speed is fast, the time required for young people to cross the zebra crossing is short, and the time required for old people and disabled people to cross the zebra crossing is slow;
the time-recording display module (5) is arranged to start an east-west-south green light to input a power supply, a signal line and a circuit board (2) are connected, and then the time-recording display module is arranged at the upper end of the left side in a shell loudspeaker (1) and is used for receiving the time required by the central processor chip (3) to automatically process and calculate the old people walking slowly and the disabled people crossing zebra crossings with different widths, when some crossing signals are interfered and the display screen of the east-west-south green light start countdown display module (5) cannot automatically display information data of the crossing, the time required by the old people walking slowly and the disabled people crossing the zebra crossings can be calculated manually, and the time-recording display module is input into the central processor chip (3) by setting an add-subtract button on the display screen of the east-west-south green light start countdown display module (5);
the image noise sensing control loudspeaker voice output module (6) is characterized in that a shell loudspeaker (1) inputs a power supply, a signal line and a circuit board (2) are connected, and then the power supply is output by a central processor chip (3) which is arranged at the lower end of the left side in the shell loudspeaker (1), the infrared detection sensor in the module and a zebra crossing camera for monitoring the east-west direction and the south-north direction shoot that a pedestrian wants to run a red light, the central processor chip (3) sends an instruction to the image noise sensing control loudspeaker voice output module (6) to enable the loudspeaker to pause voice prompt of a green light, simultaneously switch the loudspeaker to increase the volume by one time, and continuously warn the pedestrian that the pedestrian does not need to run the red light for 2 times, the central processor chip (3) sends an instruction to the image noise sensing control loudspeaker voice output module (6) to resume the normal voice prompt of the loudspeaker to the green light, when no person crosses the road at night and at the entrance of the zebra crossing, the central processing unit chip (3) sends an instruction to the image noise sensing control loudspeaker voice output module (6) to enable the prompt tone of the loudspeaker to be in a closed sleep mode, and no matter at any time, the infrared detection sensor and the monitoring camera in the image noise sensing control loudspeaker voice output module (6) shoot the east-west, the north-south cross, the T-shaped and the midway zebra crossing, the central processing unit chip (3) sends an instruction to the image noise sensing control loudspeaker voice output module (6) to enable the loudspeaker to circularly prompt the east-west, the north-south green light to be on and off, the east-west and the north-south green light to be on and off for 10, 20 and 30 seconds, the east-west and the north-south green lights to be on the fast, the young people to be on the road, the old people and the disabled people to pass next time, the east-west and the north-west, the north-south green lights and the north and the south, The south and north green lights are left for 10 seconds and all people are prohibited from passing, when the cross, the T-shaped intersection, the midway zebra crossing, vehicles, more people and high noise exist, the central processing unit chip (3) sends an instruction to the image noise sensing control loudspeaker voice output module (6), so that the image noise sensing control loudspeaker voice output module (6) automatically improves the prompt tone of the loudspeaker, when the cross, the T-shaped intersection, the midway zebra crossing, less people and low noise exist at night, the central processing unit chip (3) sends an instruction to the image noise sensing control loudspeaker voice output module (6), so that the image noise sensing control loudspeaker voice output module (6) automatically reduces the prompt tone of the loudspeaker.
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|---|---|---|---|
| CN202110611932.XA CN113421446B (en) | 2021-06-01 | 2021-06-01 | Green lamp intelligent voice prompter |
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| CN202110611932.XA CN113421446B (en) | 2021-06-01 | 2021-06-01 | Green lamp intelligent voice prompter |
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| CN113421446B true CN113421446B (en) | 2022-06-24 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06251282A (en) * | 1993-02-22 | 1994-09-09 | Matsushita Electric Ind Co Ltd | Road guidance traffic control system |
| KR20040039065A (en) * | 2002-10-30 | 2004-05-10 | 손영석 | Digital number display |
| CN202257935U (en) * | 2011-07-08 | 2012-05-30 | 张驰 | Intelligent pedestrian crossing voice prompt device |
| WO2017026642A1 (en) * | 2015-08-11 | 2017-02-16 | 임철수 | Traffic signal safety system for crosswalk |
| CN107093323A (en) * | 2017-07-07 | 2017-08-25 | 华燕妮 | A kind of urban transportation traffic light system and traffic management method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211044527U (en) * | 2019-11-01 | 2020-07-17 | 无锡安邦电气股份有限公司 | Crosswalk signal lamp with blind person sound prompt and countdown functions |
-
2021
- 2021-06-01 CN CN202110611932.XA patent/CN113421446B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06251282A (en) * | 1993-02-22 | 1994-09-09 | Matsushita Electric Ind Co Ltd | Road guidance traffic control system |
| KR20040039065A (en) * | 2002-10-30 | 2004-05-10 | 손영석 | Digital number display |
| CN202257935U (en) * | 2011-07-08 | 2012-05-30 | 张驰 | Intelligent pedestrian crossing voice prompt device |
| WO2017026642A1 (en) * | 2015-08-11 | 2017-02-16 | 임철수 | Traffic signal safety system for crosswalk |
| CN107093323A (en) * | 2017-07-07 | 2017-08-25 | 华燕妮 | A kind of urban transportation traffic light system and traffic management method |
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| Publication number | Publication date |
|---|---|
| CN113421446A (en) | 2021-09-21 |
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