CN101271626A - Intelligent traffic investigation machine - Google Patents
Intelligent traffic investigation machine Download PDFInfo
- Publication number
- CN101271626A CN101271626A CNA2008100271811A CN200810027181A CN101271626A CN 101271626 A CN101271626 A CN 101271626A CN A2008100271811 A CNA2008100271811 A CN A2008100271811A CN 200810027181 A CN200810027181 A CN 200810027181A CN 101271626 A CN101271626 A CN 101271626A
- Authority
- CN
- China
- Prior art keywords
- data
- time
- module
- traffic
- investigation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses an intelligent traffic investigator, consisting of a data acquisition module, a data communication module and a data processing module. An initial data is gathered at first by the data acquisition module, i.e. the investigator, and then is outputted by the data communication module through a receiving serial port, and saved into a computer in the form of a database; finally, the data processing module extracts the traffic informations recorded on the intelligent traffic investigator such as traffic volume, the journey time and the time of a signal lamp, etc., and processes the corresponding information according to a definition of a user, thereby realizing automation and intellectualization of the data post-processing of a traffic investigation. The intelligent traffic investigator of the invention has the advantages of simple and exquisite structure, easy carrying and easy and convenient operation, thereby being convenient for performing the on-the-spot data acquisition; and a software for processing the data in the investigator takes a normal computer as a carrier and has a powerful processing function, thereby being capable of obtaining the final processed data accurately and quickly.
Description
Technical field
The invention reside in the traffic study equipment that a cover can be gathered transport information neatly and information be carried out intelligent processing of developing, equipment has simple structure, exquisiteness, carries easily, and traffic information collection is convenient, characteristics such as information processing is accurately quick belong to the transport information technical field.
Background technology
Traffic study is a kind of objective means of carrying out in order to know current situation of traffic, and it is the Basic Ways that obtains traffic data, be carry out aspect work such as current situation of traffic analysis, traffic programme and circuit improvement, traffic theory check must be through step.We can say that traffic study is a very ordinary and extremely important basic work.
Traffic study contains that content is wide, workload is big, and the object of investigation also is multi-level multiple class, but according to the participation main body of investigation, mainly can be divided into two big classes: manual counts and mechanical investigation method.Wherein, manual counts are meant that the investigation apparatus requirement is simple, the collection of data and to handle mainly be the investigation of finishing in mode manually.This method organization work and equipment requirements are simple, and personnel placement and place change are flexible, and adaptive surface is also relatively wider, but this method need drop into great amount of manpower, be easy to generate error in on-site inspection, and the later stage often needs typing once more and deal with data.The machinery investigation method is meant by special equipment and gathers traffic data automatically, finishes correlation study.The application machine investigation method can be saved great amount of manpower, and easy to use, precision is higher, and can obtain comparatively reliable in a large number data, and still, this method generally needs a large amount of investments, and utilization rate is often not high, and applicability and dirigibility are seriously limited.
Summary of the invention
At above deficiency, the present invention proposes a kind of intelligent product-intelligent traffic investigation machine that integrates the dirigibility and the machinery investigation of manual research, it comprises data acquisition module, data communication module and data processing module:
Data acquisition module is responsible for gathering raw data, and it comprises an investigation machine and driven by program.Described investigation machine is made up of main control singlechip, storage chip, clock chip, composite-functional key-press, display unit, model selection, auditory tone cues and data transmission interface, described driven by program adopts recycle design inquiry mode of operation, shows the volume of traffic and time, adopts interrupt mode judgement button and carries out corresponding operating.The main control singlechip of investigation machine is ATmega8L, clock chip adopts DS1302, storage chip adopts AT24C64, composite-functional key-press/display unit adopts chip for driving ZLG7290 to drive, the level of a single-pole double-throw switch (SPDT) control MCU pin is used in model selection, MCU comes judgment model by the level that detects this pin, data transmission interface uses the serial ports of ATmega8L, the logic level (Transistor-Transistor Logic level) of MCU is converted to logic level (RS232 level) back and computing machine communication of PC through MAX232.Described investigation machine adopts the method for addition storage organization, just notes current date and concrete start when investigation machine is started shooting at every turn constantly, just notes the difference between current time and the start moment during each button.
The data communication module is responsible for the raw data with the intelligent traffic investigation machine storage inside, by receiving serial ports output, and preserve on computers with the form of database, this module reads the storage data of investigation machine inside by serial ports, be entered into volatile data base, but in the mode of duplicating volatile data base saved as investigation machine data processing software identification database then.
Transport information such as the volume of traffic that is write down on the data processing module extraction intelligent traffic investigation machine, journey time, signal lamp time, and according to user's definition, corresponding information is carried out a series of processing, thereby realize robotization and intellectuality that the traffic study late time data is handled, it comprises that volume of traffic statistical module, signal phase time statistical module, vehicle license method determine that journey time module, deflection method determine the journey time module.
Described volume of traffic statistical module is according to the concrete vehicle and the conversion factor thereof of each key representative in the defined statistical time range of user, unit interval, the on-site inspection, count the vehicle flowrate of each time quantum in the demand period, two kinds of statisticses of the actual traffic amount and the equivalent volume of traffic have been comprised, this module is according to querying condition generated query statement, the intelligent traffic investigation machine database is inquired about, and Query Result write on the Spreedsheet control, finally generate the Excel form;
Described signal phase time statistical module is according to the statistical time range that the user imported and the signal phase number of stages of the crossing of investigating, the demand that counts is in the period, the time span in the cycle duration of the crossing of investigating and each concrete the inside signal phase stage in cycle, model is according to querying condition generated query statement, the intelligent traffic investigation machine database is inquired about, and Query Result write on the Spreedsheet control, finally generate the Excel form;
Described vehicle license method determines that the journey time module is according to the statistical time range that the user imported, the access path in upstream and downstream investigation profile data storehouse, count each and investigate the concrete journey time of vehicle in the investigation highway section, thereby realized effective record of journey time, the statistical condition generated query statement that model is selected on main interface according to the user, intelligent traffic investigation machine upstream and downstream database is compared inquiry, and Query Result write on the Spreedsheet control, finally generate the Excel form;
Described deflection method determines that the journey time module is according to grouping time of the access path in period that the user imported, upstream and downstream investigation profile data storehouse and user's input with estimate parameter such as journey time scope, use migration algorithm to calculate journey time, the time conditions generated query statement that model is selected on main interface according to the user, intelligent traffic investigation machine upstream and downstream database is inquired about, and in conjunction with vehicle conversion factor and journey time estimated value and interval time calculating parameter such as value, use deflection method to calculate journey time.
Beneficial effect of the present invention is:
1) be convenient to operation, be better than handling: intelligent traffic investigation machine simple structure, exquisiteness, carry easily, easy and simple to handle, can carry out the collection on the spot of data easily; And the data processing software of investigation machine is a carrier with common computing machine, and powerful processing capacity is arranged, and can accurately obtain final disposal data quickly.
2) one-object-many-purposes, multiple functional: as to utilize intelligent traffic investigation machine can realize the traffic study of a plurality of classifications such as traffic census, signal time investigation, journey time investigation, delay time at stop investigation, the user can also be according to own required simultaneously, definition also realizes the investigation (for example, bus get on or off the bus personnel's type and quantity surveying etc.) of other types.
3) save manpower, optimizing resources: human resources are important restraining factors of traffic study, once large-scale traffic study, the accumulative total of manpower expense is very big, utilize intelligent traffic investigation machine can save many equipment, and when the investigation of carrying out with time correlation, can save a large amount of manpowers again.
4) simple structure, cheap: the hardware construction of intelligent traffic investigation machine is fairly simple, and cost is lower.
Description of drawings
Fig. 1 forms synoptic diagram for intelligent traffic investigation machine;
Fig. 2 is the investigation machine frame diagram;
Fig. 3 is the DLL (dynamic link library) synoptic diagram;
Fig. 4 is an ATmega8L pinouts synoptic diagram;
Fig. 5 a is a DS1032 pin synoptic diagram; Fig. 5 b is clock chip and MCU connection layout;
Fig. 6 is an AT24C64 pin synoptic diagram;
Fig. 7 is multi-disc storage chip and MCU connection layout;
Fig. 8 a is a ZLG7290 pin synoptic diagram; Fig. 8 b is ZLG7290 and MCU connection layout;
Fig. 9 is charactron and ZLG7290 connection layout;
Figure 10 is button and ZLG7290 connection layout;
Figure 11 is MAX232 and MCU connection layout;
Figure 12 is mode selecting key and MCU connection layout;
Figure 13 is a main program flow chart;
Figure 14 is a button interrupt handling routine process flow diagram;
Figure 15 is for preserving the subfunction flowchart;
Figure 16 is data communication module realization flow figure;
Figure 17 is the realization flow figure of volume of traffic statistical module and signal time statistical module;
Figure 18 determines the realization flow figure of journey time module for the vehicle license method;
Figure 19 calculates the realization flow figure of journey time module for deflection method.
Embodiment
Below in conjunction with accompanying drawing the present invention is further set forth.
As shown in Figure 1, intelligent traffic investigation machine is made up of hardware (intelligent traffic investigation machine) and software (investigation machine data processing software) two parts, comprises data acquisition, data communication and three modules of data preparation.Intelligent traffic investigation machine passes through hardware (investigation machine) image data on the spot, and raw data is transferred on the computing machine by data communication; Software (data processing software) is that platform is handled data with the computing machine, and the net result that arrangement obtains is exported.
Hardware components promptly is an investigation machine, and its function is an image data, and it is made up of members such as main control singlechip (MCU), storage chip, clock chip, composite-functional key-press, display unit, data transmission interface, mode selection switchs.
Software section refers to the investigation machine data processing software, and its function is to handle by investigation machine institute image data, is made up of data communication and two modules of data preparation.The data preparation module comprises that again volume of traffic statistical module, signal phase time statistical module, vehicle license method determine that journey time module, deflection method determine the journey time module.
Data communication is responsible for the data importing common computer that will write down and be stored among the hardware on the spot, and preserves with the form of database, so that the data of institute's typing are put in order, it is the bridge that connects between data acquisition module and the data preparation module.
Data preparation has been contained: volume of traffic statistics, signal phase time statistics, vehicle license method are determined journey time, the volume of traffic-concrete functions such as time diagram deflection method estimation journey time.
Volume of traffic statistics: the form with form counts the vehicle number (or pedestrian's number) that passes through a certain section of road in the unit interval, comprises two kinds of results of basic accumulated value and conversion accumulated value.
Signal phase time statistics: count each signal phase duration and each cycle duration of the signal lamp control crossroad of investigate with the form of form, be applicable to timing controlled simultaneously and respond to and control.
The vehicle license method is determined journey time: calculate and put out each in order with the form of form and investigate the concrete journey time of vehicle by specific road section.
The volume of traffic-time diagram deflection method estimation journey time: utilize upstream and downstream highway section check point link flow-time diagram similarity, estimate Link Travel Time.
Each module is specifically set forth:
One, data acquisition module
Data acquisition module comprises investigation machine and driven by program, is responsible for the raw data of collection, is the basis that later-stage utilization investigation machine software carries out data processing.Investigation machine carries number and passes interfaces, can be easily with the data transmission that writes down in the electronics mode on the hardware to computing machine, effectively in conjunction with computer-aided analysis, thereby greatly improve the precision and the speed of data typing, improved the efficient of software disposal data.
1.1 investigation machine
As shown in Figure 2, investigation machine is made up of members such as main control singlechip (MCU), storage chip, clock chip, composite-functional key-press, display unit, model selection, auditory tone cues, data transmission interfaces:
1.1.1 main control MCU
The ATmega8L that main control MCU adopts atmel corp to produce, its supply voltage 2.7-5.5V, the voltage adaptation scope is big, and is low in energy consumption, and inside carries the RC oscillator, is easy to the simplified system design.ATmega8L is responsible for all controls of the system that finishes as shown in Figure 4, comprise judgement, the charactron of read-write, the button of the differentiation of pattern, the modification of system time/read, storage chip demonstration, with whole functions such as data transmission of PC.ATmega8L carries the IIC communication interface, can be easily and storage chip and keyboard/display driver chip communication.
1.1.2 DLL (dynamic link library)
MCU supports online programming, can revise the wherein program of operation easily by PC.The DLL (dynamic link library) AVR-ISP DLL (dynamic link library) of standard, it is defined as: 1-MOSI, 2-VCC, 4/6/8/10-GND, 5-RST, 7-SCK, 9-MISO, the DLL (dynamic link library) synoptic diagram is as shown in Figure 3.
1.1.3 clock chip
The DS1302 that clock chip adopts DALLAS company to produce, it is the real-time timepiece chip of high-performance with the thin current charges ability of tiny stream, low-power consumption, band RAM, can to year, month, day, what day, the time, minute, second carries out timing, and having multiple functions such as leap year compensation, operating voltage is 2.5V～5.5V.
List the pin arrangements of DS1302 shown in Fig. 5 a, wherein Vcc1 is a back-up source, and VCC2 is a primary power.Under the situation that primary power cuts out, Vcc1 powers to DS1302, and clock can also continue operation after this had guaranteed system cut-off.Under the situation that primary power does not cut out, DS1302 is by Vcc1 or the Vcc2 the greater power supply among both.As Vcc2 during greater than Vcc1+0.2V, Vcc2 powers to DS1302.Wherein, clock chip and being connected shown in Fig. 5 b between the MCU.
1.1.4 storage chip
The AT24C64 that storage chip adopts atmel corp to produce, it is the EEPROM of IIC interface, the 64K storage space, and be that bus type connects, can hang 8 simultaneously at most on same the iic bus.Its supply voltage is 2.7V～5.5V, has the function that power down is preserved, and erasable 1,000,000 times, data retention period is 100 years.Storage chip carries out communication by mode and the MCU of IIC.
Fig. 6 is the pin arrangements of AT24C64, and A0, A1, A2 are that chip address is set pin, three at end that can the setting chip address, and the position of pin correspondence is 1 when linking VCC, the position of pin correspondence is 0 when linking GND.Preceding four of the address is 1010B, and promptly addressing range is from 1010000B～1010111B.WP is the write-protect pin, when it links VCC, the write operation of chip is under an embargo.SCL is the clock line of iic bus, and SDA is the data line of iic bus.
In order to ensure intelligent traffic investigation machine enough big storage space is arranged, research and development group adopts the mode that connects the multi-disc storage chip on MCU to expand hardware memory space, and Fig. 7 is the connection layout of multi-disc storage chip and MCU.
1.1.5 demonstration/button
Demonstration and button are driven by the special driving chip ZLG7290 that Zhou Ligong company in Guangzhou produces.ZLG7290 can drive 8 cloudy charactron and 64 buttons altogether, and pin is shown in Fig. 8 a.ZLG7290 passes through IIC mode and MCU communication, and keyboard interrupt signal is provided, and makes things convenient for the MCU program to handle, and specifically connects shown in Fig. 8 b.
Wherein, show with 88 sections charactrons preceding four back four other has a LED display button whether to be pressed in order to show the current time (hh:mm) in order to show the vehicle flowrate sum, charactron is connected as shown in Figure 9 with the concrete of ZLG7290; Investigation machine has 16 buttons, and wherein 0～9 is multiplexing, as the vehicle key, uses as the car plate numerical key when the License Plate Method pattern when flow rate mode.Other has 6 function keys, is respectively setting, moves to left, moves to right, output, standby, standby.Key wherein is set is used to be provided with system time, the shifted left/right key is used for moving cursor, and run-out key is used for the output data to PC.Button specifically is connected as shown in figure 10 with ZLG7290.
1.1.6 number passes interface
Data transmission interface uses the serial ports of ATmega8L, through MAX232 the logic level (Transistor-Transistor Logic level) of MCU is converted to logic level (RS232 level) back and computing machine communication of PC, and communication connects as shown in figure 11.
1.1.7 model selection
The level of a single-pole double-throw switch (SPDT) control MCU pin is used in model selection, and MCU comes judgment model by the level that detects this pin, and mode selecting key specifically is connected as shown in figure 12 with MCU.
1.2 driven by program
1.2.1 program circuit
The program of MCU operation is the core of total system, is responsible for finishing the repertoires such as detection, judgement, control, communication of total system.Wherein algorithm is the core of program, validity and stability that its relationship between efficiency moves to system.Through detailed consideration and repeatedly experiment, decision is adopted recycle design inquiry mode of operation, is shown the volume of traffic and time; Adopt interrupt mode judgement button and carry out corresponding operating.
Program circuit is illustrated in fig. 13 shown below.Read after the master routine initialization and deposited the volume of traffic in the storage chip and show, make after the shutdown that start can continue the investigation of last time once more; Enter loop program then, judge and show and continuous update displayed current time.ATmega8L inside carries house dog, need give reset signal after the startup in certain intervals, and surpassing certain hour does not have the watchdog reset signal, and system will think that MCU crashes and restarts MCU in inside.
This function can greatly improve the stability and the reliability of system.Watchdog reset is carried out in circulation in master routine, does not carry out watchdog reset if surpass 2 seconds, and it is unusual to show that promptly program run occurs, and system will restart.
The button process chip has interrupts output, chip produces look-at-me when button is effectively pressed, MCU promptly interrupts current work after detecting look-at-me, enters the button interrupt handling routine and judges button and carry out corresponding operating that button interrupt handling routine flow process is illustrated in fig. 14 shown below.
Preserving subroutine carries out data according to different working modes and preserves: 1. when being in volume of traffic pattern, directly noting the current time and represent the current button number of different automobile types; 2. when being in the License Plate Method pattern, just judgement and wait preserve it get off with the current time as a license plate number by three keys of foot again.Preserve subfunction and carry out flow process as shown in figure 15.
1.2.2 data store organisation
For the optimal Storage space, increase the memory data output of investigation machine, the present invention adopts method of addition to preserve data, just notes current date and concrete start when promptly starting shooting constantly at every turn, just notes the difference between current time and the start moment during each button.Because the maximum expression 65535 of the unsigned number of two bytes (unsigned int) has been enough to guarantee to note arbitrary moment and started shooting difference constantly, the unsigned number with two bytes writes down button/license plate number again.
Enumerate two examples, the data store organisation when adopting method of addition be described,
The 1 hypothesis date of example is April 17, and initial time is 14: 10: 10, and method of addition storage data declaration is as follows:
At first note current date and concrete start constantly, origination date and initial time respectively as shown in Table 1 and Table 2:
| 1 | 61 |
Table 1 is the origination date storage format
| 2 | 38 | 216 |
Table 2 is the initial time storage format
Origination date is calculated as: 1 * 256+161 * 1=417, i.e. April 17;
Initial time is calculated as: 2 * 65536+38 * 256+216 * 1=141010, i.e. 14:10:10.
Example 2: the concrete moment of during the on-site inspection vehicle license, pressing " 386 " number key is " 14: 25: 18 on the 17th April ", and storage is car plate and constantly concrete down.
The raw readings of example 2 is " 386,0417142518 ", in method of addition, with two byte records type of vehicle " 386 ", and the time data of back " 0417142518 " just can utilize origination date and the initial time preserved on the investigation machine to simplify, and is specifically as shown in table 3.
| 1 | 130 | 5 | 228 |
Table 3 method of addition example 2 storage formats
The one or two byte is represented car amount licence plate (three): 1 * 256+130 * 1=386;
The 3rd nybble is represented the mistiming, and it is the same with example 1 to specify calculating.
Therefore, the data store organisation of employing method of addition, each data only need take 4 bytes of memory spaces, the storage chip of 64kbit can write down 2000 data, eight chips can write down 1.6 ten thousand data simultaneously, and data capacity improves greatly, almost can satisfy arbitrary traffic study.
Two, data communication module
Data importing module (claiming the data communication module again), be responsible for data with the intelligent traffic investigation machine storage inside, by receiving serial ports output, and preserve on computers, for further realization and other relevant traffic study of data preparation function provides basic data with the form of database.
The realization flow of data importing module as shown in figure 16, model reads the storage data of investigation machine inside by serial ports, is entered into volatile data base, but in the mode of duplicating volatile data base is saved as investigation machine data processing software identification database then.In this process, the gordian technique that relates to is that serial ports reads, the typing of database and preservation, and file copy etc.
Three, data processing module
3.1 volume of traffic statistical module
Volume of traffic statistical module is according to the concrete vehicle and the conversion factor thereof of each key representative in the defined statistical time range of user, unit interval, the on-site inspection, count the vehicle flowrate of each time quantum in the demand period, comprised two kinds of statisticses of the actual traffic amount and the equivalent volume of traffic.
The core of this function is exactly the touch potential that counts in the unit interval.Investigation machine is provided with 0-9 totally 10 numerical keys, in the data acquisition, presses numerical key, and investigation machine can be noted the numeral of button and the concrete moment that pushes button, and it is stored on the storage chip with specific data segment form.During data processing, by data communication the record of being stored on the investigation machine is imported computer with the database form, the user can define different vehicles according to the key number of representative vehicle in each data segment (for example: " 1 " key representative " large car " then, " 2 " key representative " compact car ", " 3 " key representative " motorcycle " etc.), the conversion factor (as: equivalent car reduction coefficient etc.) of each button representative vehicle can be set simultaneously, utilize the defined time period of user (the minimum time section is 1 second), to institute's deposit data storehouse staging treating, the data of each period are carried out original add up and after conversion adds up, derive with the form of Excel form.
The realization flow of volume of traffic statistical module as shown in figure 17, model is inquired about the intelligent traffic investigation machine database according to querying condition generated query statement, and Query Result is write on the Spreedsheet control, finally generates the Excel form.In this process, the gordian technique that relates to is the logical relation of each querying condition on the operation interface, the algorithm realization of statistics and the technology of controlling of Spreadsheet.
3.2 signal time statistical module
The signal time statistical module is according to the statistical time range that the user imported and the signal phase number of stages of the crossing of investigating, and the demand that counts is in the period, the cycle duration of the crossing of investigating and the time span in each concrete the inside signal phase stage in cycle.
The core of this function be calculate between twice button after length.This function and " volume of traffic statistics " function class seemingly, in data acquisition, the user can define different buttons and represent different signal phase according to the concrete signal stage number of investigation signal lamp control crossroad in signal period.For example,, can define " 1 " key representation signal Phase I, " 2 " key representation signal Phase, " 3 " key representation signal Phase I for the signal lamp control crossroad that comprises three signal phase in certain each signal period.In on-site inspection, signal phase I presses " 1 " key when just having started, press " 2 " key when changing into signal phase II, signal phase II presses " 3 " key when changing into signal phase III, signal phase III presses " 1 " key once more when changing into signal phase I ... repeatedly cycling.In data processing, with the duration of the mistiming between the different key as a certain concrete signal stage.For example, the mistiming of " 1 " key that the concrete moment that " 2 " key is pressed and its front are faced mutually between constantly is as the duration of signal phase I ... because a signal period can be divided into several concrete signal phase, so circulation pushes button repeatedly in the data acquisition, then can derive each phase place stage duration in a plurality of times in signal complete period and each concrete cycle in data-handling procedure.
The realization flow of signal time statistical module as shown in figure 17, model is inquired about the intelligent traffic investigation machine database according to querying condition generated query statement, and Query Result is write on the Spreedsheet control, finally generates the Excel form.In this process, the gordian technique that relates to is the logical relation of each querying condition on the operation interface, the fault-tolerant technique of data statistics and the technology of controlling of Spreadsheet.
3.3 the vehicle license method is determined the journey time module
The vehicle license method determines that the journey time module according to the statistical time range that the user imported, the access path in upstream and downstream investigation profile data storehouse, counts each and investigates the concrete journey time of vehicle in the investigation highway section, thereby realized effective record of journey time.
The core of this function is relatively to extract the identical a pair of data of car plate field in the upstream and downstream highway section institute acquisition database, and calculates this button time difference to data.This is owned by France in two investigation machines realization functions, when utilizing this method investigation, must use the intelligent traffic investigation machine record data respectively at the upstream and downstream crossing that will investigate the highway section.During record data, the user can press three numerical keys continuously, correspondingly behind the vehicle license plate that observed of representative three.During data processing, open crossing, upstream and downstream, same highway section database, relatively and extract and have identical car plate data in the database (behind the car plate three the same, as same car), relatively the crossing, upstream and downstream of the car plate that extracts record constantly, utilize formula " journey time=crossing, the downstream road junction moment-upstream constantly ", then can try to achieve the concrete journey time of each registration of vehicle.
The realization flow that the vehicle license method is determined the journey time module as shown in figure 18, the statistical condition generated query statement that model is selected on main interface according to the user, intelligent traffic investigation machine upstream and downstream database is compared inquiry, and Query Result write on the Spreedsheet control, finally generate the Excel form.In this process, the gordian technique that relates to is the logical relation of each querying condition on the operation interface, the concurrent access of upstream and downstream database and the technology of controlling of Spreadsheet.
3.4 deflection method is determined the journey time module
Deflection method determines that the journey time module is according to grouping time of the access path in period that the user imported, upstream and downstream investigation profile data storehouse and user's input with estimate parameter such as journey time scope, use migration algorithm to calculate journey time, this function belongs to the traffic simulation function.
The core of this function is to utilize upstream and downstream highway section check point link flow-time diagram similarity, estimates Link Travel Time.This is the novel method of inferring journey time that is proposed and verified by Zhongshan University intelligent transportation center.
The realization flow of deflection method calculating journey time module as shown in figure 19, the time conditions generated query statement that model is selected on main interface according to the user, intelligent traffic investigation machine upstream and downstream database is inquired about, and in conjunction with vehicle conversion factor and journey time estimated value and interval time calculating parameter such as value, use deflection method to calculate journey time.In this process, the gordian technique that relates to is the computing of database read extract operation and deflection method.
Claims (6)
1, a kind of intelligent traffic investigation machine, it comprises data acquisition module, data communication module and data processing module:
Data acquisition module is responsible for gathering raw data, and it comprises an investigation machine and driven by program;
The data communication module is responsible for the raw data with the intelligent traffic investigation machine storage inside, exports by receiving serial ports, and preserves on computers with the form of database;
Transport information such as the volume of traffic that is write down on the data processing module extraction intelligent traffic investigation machine, journey time, signal lamp time, and according to user's definition, corresponding information is carried out a series of processing, thereby realize robotization and intellectuality that the traffic study late time data is handled, it comprises that volume of traffic statistical module, signal phase time statistical module, vehicle license method determine that journey time module, deflection method determine the journey time module.
2, intelligent traffic investigation machine according to claim 1, it is characterized in that, described investigation machine is made up of main control singlechip, storage chip, clock chip, composite-functional key-press, display unit, model selection, auditory tone cues and data transmission interface, DLL (dynamic link library) adopts recycle design inquiry mode of operation, shows the volume of traffic and time, adopts interrupt mode judgement button and carries out corresponding operating.
3, intelligent traffic investigation machine according to claim 2, it is characterized in that, the main control singlechip of described investigation machine is ATmega8L, clock chip adopts DS1302, storage chip adopts AT24C64, composite-functional key-press/display unit adopts chip for driving ZLG7290 to drive, the level of a single-pole double-throw switch (SPDT) control MCU pin is used in model selection, MCU comes judgment model by the level that detects this pin, data transmission interface uses the serial ports of ATmega8L, through MAX232 be with the logic level transition of MCU after the logic level of PC with the computing machine communication.
4, intelligent traffic investigation machine according to claim 1, it is characterized in that, described investigation machine adopts the method for addition storage organization, just notes current date and concrete start when investigation machine is started shooting at every turn constantly, just notes the difference between current time and the start moment during each button.
5, intelligent traffic investigation machine according to claim 1, it is characterized in that, described data communication module reads the storage data of investigation machine inside by serial ports, be entered into volatile data base, but in the mode of duplicating volatile data base saved as investigation machine data processing module identification database then.
6, intelligent traffic investigation machine according to claim 1 is characterized in that,
Described volume of traffic statistical module is according to the concrete vehicle and the conversion factor thereof of each key representative in the defined statistical time range of user, unit interval, the on-site inspection, count the vehicle flowrate of each time quantum in the demand period, two kinds of statisticses of the actual traffic amount and the equivalent volume of traffic have been comprised, this module is according to querying condition generated query statement, the intelligent traffic investigation machine database is inquired about, and Query Result write on the Spreedsheet control, finally generate the Excel form;
Described signal phase time statistical module is according to the statistical time range that the user imported and the signal phase number of stages of the crossing of investigating, the demand that counts is in the period, the time span in the cycle duration of the crossing of investigating and each concrete the inside signal phase stage in cycle, model is according to querying condition generated query statement, the intelligent traffic investigation machine database is inquired about, and Query Result write on the Spreedsheet control, finally generate the Excel form;
Described vehicle license method determines that the journey time module is according to the statistical time range that the user imported, the access path in upstream and downstream investigation profile data storehouse, count each and investigate the concrete journey time of vehicle in the investigation highway section, thereby realized effective record of journey time, the statistical condition generated query statement that model is selected on main interface according to the user, intelligent traffic investigation machine upstream and downstream database is compared inquiry, and Query Result write on the Spreedsheet control, finally generate the Excel form;
Described deflection method determines that the journey time module is according to grouping time of the access path in period that the user imported, upstream and downstream investigation profile data storehouse and user's input with estimate parameter such as journey time scope, use migration algorithm to calculate journey time, the time conditions generated query statement that model is selected on main interface according to the user, intelligent traffic investigation machine upstream and downstream database is inquired about, and in conjunction with vehicle conversion factor and journey time estimated value and interval time calculating parameter such as value, use deflection method to calculate journey time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100271811A CN101271626A (en) | 2008-04-02 | 2008-04-02 | Intelligent traffic investigation machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100271811A CN101271626A (en) | 2008-04-02 | 2008-04-02 | Intelligent traffic investigation machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101271626A true CN101271626A (en) | 2008-09-24 |
Family
ID=40005573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100271811A Pending CN101271626A (en) | 2008-04-02 | 2008-04-02 | Intelligent traffic investigation machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101271626A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944290A (en) * | 2010-09-14 | 2011-01-12 | 深圳职业技术学院 | Traffic survey instrument and traffic survey method |
| CN103310057A (en) * | 2013-06-14 | 2013-09-18 | 广州市公共交通数据管理中心 | Microscopic traffic simulation running method and device |
| CN105046959A (en) * | 2015-06-30 | 2015-11-11 | 东南大学 | Method for extracting urban road travelling time based on bi-window sliding matching mechanism |
| CN106056935A (en) * | 2016-06-01 | 2016-10-26 | 东莞职业技术学院 | Intelligent traffic guidance system and method |
| CN106652494A (en) * | 2015-11-03 | 2017-05-10 | 中国移动通信集团公司 | Traffic light control method and device |
| CN108764575A (en) * | 2018-05-30 | 2018-11-06 | 深圳市益鑫智能科技有限公司 | A kind of intelligent transportation system |
-
2008
- 2008-04-02 CN CNA2008100271811A patent/CN101271626A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944290A (en) * | 2010-09-14 | 2011-01-12 | 深圳职业技术学院 | Traffic survey instrument and traffic survey method |
| CN101944290B (en) * | 2010-09-14 | 2012-06-06 | 深圳职业技术学院 | Traffic survey method |
| CN103310057A (en) * | 2013-06-14 | 2013-09-18 | 广州市公共交通数据管理中心 | Microscopic traffic simulation running method and device |
| CN105046959A (en) * | 2015-06-30 | 2015-11-11 | 东南大学 | Method for extracting urban road travelling time based on bi-window sliding matching mechanism |
| CN106652494A (en) * | 2015-11-03 | 2017-05-10 | 中国移动通信集团公司 | Traffic light control method and device |
| CN106056935A (en) * | 2016-06-01 | 2016-10-26 | 东莞职业技术学院 | Intelligent traffic guidance system and method |
| CN108764575A (en) * | 2018-05-30 | 2018-11-06 | 深圳市益鑫智能科技有限公司 | A kind of intelligent transportation system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101271626A (en) | Intelligent traffic investigation machine | |
| CN100543753C (en) | Hardware description language (HDL) program implementation | |
| Angiolini et al. | A post-compiler approach to scratchpad mapping of code | |
| CN102486813B (en) | Transaction-level system power consumption estimation method and system | |
| CN101877018B (en) | Multiple-power-domain static timing analysis | |
| CN101932996A (en) | Have parallel processing computer that reduces power consumption and the method that this system is provided | |
| CN101256502B (en) | System and method for simulating multiprocessor system | |
| CN100356341C (en) | Method for estimating power consumption when embedded software running based on simulator | |
| CN102163072A (en) | Software-based thread remapping for power savings | |
| CN102012917A (en) | Information processing device and method | |
| CN102262434A (en) | Method and apparatus for modifying a transition to an altered power state of an electronic device based on accelerometer output | |
| CN103873528A (en) | Method and equipment for distributing system resources for user | |
| Liu et al. | Streamlining smart meter data analytics | |
| CN103077039A (en) | Software development platform for embedded industrial control instrument | |
| CN202383574U (en) | Embedded industrial controller main board | |
| CN101344870A (en) | FIFO control module with strong reusability and method for managing internal memory | |
| CN1890637B (en) | Methods and apparatus to dynamically insert prefetch instructions based on garbage collector analysis and layout of objects | |
| CN105975664B (en) | A kind of appraisal procedure of chip power-consumption Evaluation Platform | |
| CN105653830A (en) | Data analysis method based on model driving | |
| CN111241083A (en) | Bill clearing method, device, electronic equipment and computer readable storage medium | |
| CN101131715A (en) | Micro-processor IP nuclear design method for navigation system | |
| CN101499971B (en) | Service network performance optimization system | |
| CN202795364U (en) | Dynamically reconfigurable test measuring instrument | |
| CN201177874Y (en) | Portable traffic management instrument based on ARM | |
| CN100511103C (en) | Man-machine interface system with facilities Control bridge and design operation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080924 |