CN202352085U - Intelligent traffic light based on single chip microcomputer - Google Patents
Intelligent traffic light based on single chip microcomputer Download PDFInfo
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- CN202352085U CN202352085U CN2011204376595U CN201120437659U CN202352085U CN 202352085 U CN202352085 U CN 202352085U CN 2011204376595 U CN2011204376595 U CN 2011204376595U CN 201120437659 U CN201120437659 U CN 201120437659U CN 202352085 U CN202352085 U CN 202352085U
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Abstract
The utility model discloses an intelligent traffic light based on a single chip microcomputer, which comprises a video camera. The video camera is connected with a video processing unit through a video synchronous separating unit. The video processing unit is further connected with an information processing unit with a display unit, can be installed in a crossroad with large traffic flow and is wide in application range. The vehicle number in videos is obtained after videos acquired by the video camera are processed by the video synchronous separating unit and the video processing unit, a signal processing unit optimizes the green light passing time in all directions in the crossroad according to a pre-programmed program and controls the traffic light and the displaying of a countdown display unit. The intelligent traffic light based on the single chip microcomputer has the advantages of being convenient to manufacture, simple in circuits, low in cost, intelligentized, high-efficiency and the like.
Description
Technical field
The utility model belongs to intelligent transportation field, relates in particular to a kind of SCM Based intelligent traffic light.
Background technology
At present, traffic lights have been brought into play huge effect aspect the urban transportation vehicle dredging, be the most common also be effective method.But along with China's rapid development of economy, the quantity of automobile sharply increases, and for example 2010, China was total to more than 1,600 ten thousand of selling automobiles, causes urban transportation very crowded, becomes the problem that Government departments need to be resolved hurrily.
The crowded method of transport solution has two kinds substantially, and a kind of is to accelerate urban road construction, the road that thorough planning is yet to be built, and this method is the basic method of transport solution congested problem; Second method is to strengthen the urban road management, a kind of SCM Based intelligent traffic light device that proposes such as the utility model and the hitting dynamics of strengthening traffic violations, intelligent transportation or the like.As everyone knows, the control mode of present most of traffic lights is more inflexible, adopts mostly and sets regular time at interval, and traffic lights is worked with changeless mode according to this at interval.Yet, find that through regular meeting a direction has a lot of vehicles waiting for red light, it but is green light that other direction does not almost have vehicle, this phenomenon not only reduces the traffic efficiency of road, and the quality time of having wasted personnel influences mood of driver or the like.
Summary of the invention
To the shortcoming and defect that conventional traffic light exists, the purpose of the utility model is, a kind of SCM Based intelligent traffic light is provided, and can alleviate the urban traffic congestion problem to a certain extent, improves the traffic efficiency and the traffic capacity of existing road.
In order to realize above-mentioned task, the utility model adopts following technical scheme to be achieved:
A kind of SCM Based intelligent traffic light comprises video camera, it is characterized in that, described video camera connects video processing unit through the audio video synchronization separative element, and video processing unit also is connected with an information process unit that has display unit.Said units can be installed on the traffic signals lamp stand.
Other characteristics of the utility model are:
Said video camera is economical light filling road video camera AV-9030H-ITS/R.
Said audio video synchronization separative element is video separation chip LM1881.
The MC9S12DG128 single-chip microcomputer that said video processing unit adopts freescale company to produce; The information of its receiver, video synchronous separating unit input in real time; And these information are handled fast and accurately, obtain a certain direction in crossing and wait for current vehicle number.
Said information process unit adopts Atmel company to produce the AT89C51 single-chip microcomputer, and it is the information imported of receiver, video processing unit in real time, and these information are handled fast and accurately, controls traffic lights work then.
Said display unit is digital display tube of common 8 segmentations and light emitting diode, and 8 hop count sign indicating number display tubes are used for countdown, and light emitting diode is as red, green, yellow lamp.
The SCM Based intelligent traffic light of the utility model can be installed in the bigger crossroad of vehicle flowrate, has wide range of applications.The video recording of camera acquisition; Through obtaining the vehicle number in the video after audio video synchronization separation and the video processing unit processing; Signal processing unit is according to the green light transit time of the program optimization crossing all directions that write in advance, and control traffic lights and countdown display unit show.Have easy to makely, circuit is simple, and cost is low, more characteristics such as intellectuality, high efficiency.
Description of drawings
Fig. 1 is the structural representation block diagram of the utility model.
Fig. 2 is a power supply circuit.
Fig. 3 is the video processing circuits schematic diagram.
Fig. 4 is information processing and display circuit schematic diagram.
Fig. 5 is the workflow diagram of the utility model.
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Embodiment
With reference to shown in Figure 1, present embodiment provides a kind of hardware configuration of SCM Based intelligent traffic light, comprises video camera, audio video synchronization separative element, video processing unit, information process unit and display unit.
In the present embodiment, video camera adopts the economical light filling road video camera that coal is produced in the Shandong, and model is: AV-9030H-ITS/R.The camera of this video camera adopts the special light sources light filling, and is all not reflective to word and background color; High light can be looked at straight, and the target under the high light can be seen; Have waterproof, anti-thunderbolt function; Pixel is 752*582.This unit adopts the 12V powered by direct current.
The audio video synchronization separative element adopts the LM1881 chip, and this chip is used to extract the standard negative of peak-to-peak value amplitude from 0.5V to 2V to synchronous NTSC.It has the input impedance greater than 10 kilo-ohms, less than 10 milliamperes electric power outputting current, and composite sync and frame output, the output of strange/idol is in subzero 40 ℃ to 85 ℃ work down.
The MC9S12DG128 single-chip microcomputer that video processing unit adopts Freescale company to produce.What it was a M68HC12 series 16 in the single-chip microcomputer is a kind of; Its inner structure mainly contains the single-chip microcomputer essential part and the CAN functional block is partly formed; Basic structure comprises: central processor unit HCS12 (CPU), 2 asynchronous serial communication mouth SCI, 2 synchronous serial communication mouth SPI; 8 passages input capture/output is timer relatively; 18 passage pulse width modulation module and 49 independent digit I/O mouths (wherein 20 have external interrupt and arousal function) also have the Flash ROM of 128KB, the RAM of 8KB and the EEPROM of 2KB in sheet; The CAN functional block comprises the msCAN controller composition of two compatible CAN2.0A/B agreements; Internal resource that these are abundant and external interface resource can satisfy ECU to the processing of various data, the transmission and the reception requirement of CAN network data; Two msCAN12 modules that chip is integrated can realize the gateway node function of high low speed CAN network.
The AT89C52 single-chip microcomputer that adopts Atmel company to produce in the information process unit; It comprises the 8-bit microprocessor of high-performance, low-power consumption; Include 8k bytes can be erasable repeatedly read-only program memory (PEROM) and the random data storer (RAM) of 256bytes, device adopts high density, the nonvolatile storage technologies production of Atmel company.Information process unit mainly receives and handles the information that the electric quantity signal input block transmits, and to voice alerting unit output control signal.
Display unit adopts 8 hop count sign indicating number display tube and light emitting diodes, and 8 hop count sign indicating number display tubes are used for countdown, and light emitting diode is as red, green, yellow lamp.
Above-mentioned each unit can be installed on the traffic signals lamp stand.
With reference to Fig. 2, feed circuit adopt the 220V alternating current, through output 5V direct current after full-bridge filtering, the voltage stabilizing.A bridge rectifier circuit is formed by 4 diodes in the transformer back, just obtains a direct supply that voltage fluctuation is very big after the rectification, so connect the electrochemical capacitor of a 2200uf here; The voltage of output through voltage stabilizing chip LM7805 voltage stabilizing after, become voltage stable+the 5V direct current supplies information process unit, display unit and video processing unit to use.
With reference to Fig. 3, the AV-9030H-ITS/R video camera has 3 lines, ground wire, power lead and signal wire.The electric capacity of signal line passes 0.1uf links to each other with 2 pins of Video Sync Separator Chip LM1881; Audio video synchronization is separated row, the row of accomplishing video image and is separated; 1,7 pins link to each other with PT2 with the PT3 of single-chip microcomputer MC9S12DG128 respectively, respectively the row and column information of control of video image.
With reference to Fig. 4; Signal input information processing unit after handling through video processing unit: i.e. the P1 mouth of AT89C51 single-chip microcomputer is used to show the 8 hop count sign indicating number display tubes and the light emitting diode work that is used to show traffic lights of countdown according to written program control in advance.P2 mouth control traffic lights, P22, P23 and P24 mouth control A direction traffic lights, P25, P26 and P27 mouth control B direction traffic lights.The digital display tube of control countdown after instruction process latch 74LS373 that the P1 mouth of single-chip microcomputer sends and 2826 the processing.
With reference to Fig. 5, the workflow of this SCM Based intelligent traffic light is as follows: at first, total system is accomplished initial work; A direction and B direction respectively have two video cameras; Gather the scene of direction separately, separate the back through synchronization video and generate the row and column picture signal, extract the envelope of vehicle image according to the program of finishing in advance; And the vehicle that gets together carried out image segmentation, thereby calculate the vehicle number of all directions in real time.If the vehicle fleet in the image of two video cameras of A direction is greater than the B direction, A direction proper extension green time then; Otherwise, proper extension B direction green time.Certainly control strategy can more be seen intellectuality, hommization, further accurately controls traffic lights work such as the function of the difference that can set up A, B direction vehicle number and A, B direction green extension.
Claims (6)
1. a SCM Based intelligent traffic light comprises video camera, it is characterized in that, described video camera connects video processing unit through the audio video synchronization separative element, and video processing unit also is connected with an information process unit that has display unit.
2. SCM Based intelligent traffic light as claimed in claim 1 is characterized in that, described video camera is selected light filling road video camera AV-9030H-ITS/R.
3. SCM Based intelligent traffic light as claimed in claim 1 is characterized in that, described audio video synchronization separative element is selected video separation chip LM1881.
4. SCM Based intelligent traffic light as claimed in claim 1 is characterized in that, described video processing unit adopts the MC9S12DG128 single-chip microcomputer.
5. SCM Based intelligent traffic light as claimed in claim 1 is characterized in that, described information process unit adopts the AT89C51 single-chip microcomputer.
6. SCM Based intelligent traffic light as claimed in claim 1 is characterized in that, described display unit is digital display tube of 8 segmentations and light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204376595U CN202352085U (en) | 2011-11-08 | 2011-11-08 | Intelligent traffic light based on single chip microcomputer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011204376595U CN202352085U (en) | 2011-11-08 | 2011-11-08 | Intelligent traffic light based on single chip microcomputer |
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| CN202352085U true CN202352085U (en) | 2012-07-25 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103929571A (en) * | 2013-01-11 | 2014-07-16 | 南京普爱射线影像设备有限公司 | Video signal processing circuit |
| CN104376732A (en) * | 2014-10-30 | 2015-02-25 | 陕西科技大学 | Intelligent traffic light based on signal control processing technology and signal control method |
| CN104392616A (en) * | 2014-12-19 | 2015-03-04 | 武汉大学 | Intelligent traffic light control system and method |
| CN106229011A (en) * | 2016-08-08 | 2016-12-14 | 常熟市东方特种金属材料厂 | A kind of Novel dial plate handwheel |
| CN114299737A (en) * | 2021-12-03 | 2022-04-08 | 江苏航天大为科技股份有限公司 | Synchronous timing signal generating device for internet signal lamp |
-
2011
- 2011-11-08 CN CN2011204376595U patent/CN202352085U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103929571A (en) * | 2013-01-11 | 2014-07-16 | 南京普爱射线影像设备有限公司 | Video signal processing circuit |
| CN104376732A (en) * | 2014-10-30 | 2015-02-25 | 陕西科技大学 | Intelligent traffic light based on signal control processing technology and signal control method |
| CN104392616A (en) * | 2014-12-19 | 2015-03-04 | 武汉大学 | Intelligent traffic light control system and method |
| CN106229011A (en) * | 2016-08-08 | 2016-12-14 | 常熟市东方特种金属材料厂 | A kind of Novel dial plate handwheel |
| CN114299737A (en) * | 2021-12-03 | 2022-04-08 | 江苏航天大为科技股份有限公司 | Synchronous timing signal generating device for internet signal lamp |
| CN114299737B (en) * | 2021-12-03 | 2022-12-02 | 江苏航天大为科技股份有限公司 | Synchronous timing signal generating device for internet connection signal lamp |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120725 Termination date: 20121108 |