EP0886845A1 - Verkehrsabhängige steuerung von verkehrs-lichtsignalanlagen mit hilfe von fuzzy-logik - Google Patents
Verkehrsabhängige steuerung von verkehrs-lichtsignalanlagen mit hilfe von fuzzy-logikInfo
- Publication number
- EP0886845A1 EP0886845A1 EP97916338A EP97916338A EP0886845A1 EP 0886845 A1 EP0886845 A1 EP 0886845A1 EP 97916338 A EP97916338 A EP 97916338A EP 97916338 A EP97916338 A EP 97916338A EP 0886845 A1 EP0886845 A1 EP 0886845A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- green
- time
- traffic
- red
- 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.)
- Granted
Links
- 230000006978 adaptation Effects 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 16
- 230000001419 dependent effect Effects 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 7
- 210000003462 vein Anatomy 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
- G08G1/08—Controlling traffic signals according to detected number or speed of vehicles
Definitions
- T he invention relates to a traffic-dependent Steue ⁇ tion of traffic light systems with the aid of fuzzy logic in accordance with the preamble of claim 1.
- the control of traffic lights for road traffic depending on traffic volume has long been known and common.
- the green time is often measured, that is to say a need-based adjustment of the release time is determined.
- time gaps and occupancy levels in the access routes to the nodes were predominantly used for adapting the release time to traffic.
- fixed threshold values have been defined. Exceeding or falling below these threshold values, or combinations of these input variables, leads to the switching off or extension of the current traffic flow.
- the release time is adjusted by means of time gap measurement, the time intervals between successive vehicles of a vehicle stream are measured as a time gap by means of a detector in the access point.
- the release time is adjusted after the selected minimum release time has elapsed or after an earliest point in time in circulation has been adapted to the current requirements of the inflowing vehicles.
- the release time can be extended until the measured time gap is at least as large as a predefined time gap threshold or until the longest defined release time or the latest extension time in the signal circulation is reached.
- threshold values for the termination of the release time are also defined. The measurement values are evaluated separately for each lane.
- the original occupancy rate is smoothed using a compensation procedure. If necessary, a compensation factor is used for increasing and decreasing tendencies of the original values.
- the volume density method compares the number of vehicles in front of red with the time gaps in traffic.
- a limit value curve is defined, which assigns a fixed time gap value to a fixed number of waiting vehicles, up to which the current release time is extended.
- Green time assessment according to urgency is an extension of the volume density method.
- the number of vehicles in front of red is compared with the time gaps and also with the occupancy in the current traffic. Threshold values are also used here.
- a signal group control of the L ic h tsignalstrom to switching recommendations determined who d s in order to influence the signal groups, ie those
- the current traffic condition is assessed using fuzzy logic. After weighing up the different interests of the competing traffic flows, a decision is made about the termination or extension of the current phase and a selection of the next phase, but depending on the possibilities given by the current signal / master plan. So far, hard, ie clearly defined threshold values have been used as a basis for all known methods.
- fuzzy logic in the area of node control now makes it possible to replace these hard threshold values with smooth transitions. This enables a much more differentiated consideration of the input values. Another advantage is that it is now possible to link several input variables in a clear manner. For this purpose, the fuzzy control is constructed in several stages with a series of processing modules.
- modules for processing the input values are used in an observation level.
- the required green times are in a green time requirement module for the individual Signal groups and a signal group weighting are calculated in a signal group weighting module.
- phase weights are calculated in a third stage for use in phase controls, and recommendations for extending, stopping or switching on phases are generated.
- the phase update module is provided in the control level. Recommendations for extending and canceling or switching on signal groups are generated for use in signal group control.
- a signal group update module is provided for this. This takes place within the framework of the signal plan, which is adapted accordingly by means of a signal / master plan adaptation module.
- FIG. 1 schematically shows the principle according to the invention
- FIG. 2 shows a structure of the green time requirement module
- FIG. 3 shows a section of the rule base 1
- FIG. 4 fuzzy sets of the input variable assignment.
- the traffic-dependent light signal control according to the invention with fuzzy logic has a modular structure and consists of two levels, as shown in FIG. 1.
- the data processing of the control unit DVSG with the operating system BS and with the control method SV, which can be a phase control or a signal group control, is indicated schematically on the left.
- the fuzzy control FS with the individual modules is shown schematically on the right.
- the operating system BS of the control unit With the operating system BS of the control unit, the raw detector data are recorded and preprocessed in (1).
- the fuzzy control FS receives both detector and signal status data DSD and module call data MAD from the control unit.
- the observation level BE of the fuzzy control FS there are modules for data acquisition, data processing and information compression. Detector values prepared by the control unit and information about the system status (DSD) are used as input values. From this, compressed, signal group-related information VEI is generated, which is processed in the control level . With the help of this information, an adjustment of the signal / frame plan for the next cycle is carried out in the control level SE.
- a recommendation for extending or switching off the current phase / signal groups is generated and the number of the next phase transition or the signal groups to be switched on is output to the higher-level control method SV (eg PDM or VS-PLUS).
- the modules are designed in such a way that they can be used independently of a defined intersection geometry and independently of the installation of the detectors. In the case of traffic-dependent control, of course a certain basic equipment of detectors is required.
- the modules are based on a manageable number of parameters set. Normally, all signal groups are treated equally. However, individual signal groups can also be prioritized by changing the corresponding parameters.
- the use of the output values of the detectors depends on the position of the detectors. This will be explained in more detail.
- phase controls a switching recommendation is given in a subsequent phase if the weighting of the current phase is less than or equal to the weighting of a subsequent phase.
- the recommendations for switching on or off are given Signal groups generated As can be seen from FIG.
- the observation plane BE essentially has three modules.
- DBM input values
- DSD input values
- the green time requirement module GBM provides the required Green times of the signal groups calculated for the next round.
- an evaluation of the urgency of the release request is made every second in the signal group weighting module SGGM. For this purpose, a weighting is calculated for each signal group. The higher the weight of a signal group, the greater their desire to get release times. When generating the weighting, a distinction is made between signal groups that are enabled and signal groups that are currently locked.
- the green time requirement module GBM has four control bases RB1 to RB4, as shown in FIG. 2.
- the linking of the input values depends on the signal status and the position of the detectors. During the green time of the signal groups
- Counting and occupancy values ZW, BW determined. These values are normalized, fuzzyfied and processed with the help of the rule base RBl to a green time factor GFl.
- Rule 1 if the occupancy is small and the count is small, the green time factor is very small.
- Rule 2 if the occupancy is medium and the count is small, the green time factor is medium.
- VL very small
- LOW small
- MED medium
- HIGH large
- fuzzy sets With the aid of the fuzzy sets (LOW, ED, HIGH), see FIG. 4, the standardized, "sharp" occupancy value for further processing in the fuzzy control (FS) is converted into a fuzzy description form. It is converted this is described by its degree of belonging (belief) to the fuzzy sets. This process is referred to as fuzzyfication.
- fuzzyfication The conversion of the "unsharp" value at the output of the fuzzy control to a sharp value is accordingly referred to as defuzzification.
- the green time factor GF1 thus determined is determined in a subsequent step via the rule base RB3 with the green time d ar f GBA linked for the current circulation.
- the resultieren ⁇ d e A usgangsiere is called green-time factor GF2.
- the input variables used are determined as a function of the detector position. If there are only detectors on the stop line, the last time gap LZ before the green termination is linked via the rule base RB2 with the time until the first arrival of a vehicle in "red" AR.
- This red time factor RF1 determined in this way is also linked in the subsequent stage via the rule base RB3 with the green time requirement GBA for the current circulation.
- the resulting output variable is called the red time factor RF2.
- the vehicle arrival rate in "red" ARR is linked to the green time requirement GBA for the current circulation with the rule base RB4.
- the resulting factor is called the red time factor RF2 multi-lane carriageways, the maximum green time or red time factor is used.
- the control level SE of the fuzzy control FS has three modules.
- the signal / master plan adaptation module SRAM an adaptation of the signal / master plan for the next round is carried out based on the green time requirement of the signal groups for the next round. This happens once at the end of a cycle and taking into account coordination points and restrictions by the planner, the higher-level control method and taking into account the structure of the given signal / framework plan.
- a list of the signal groups to be switched on and off is generated in the signal group update module SGAM on the basis of the signal / master plan and the signal group weights.
- PAM are the weights of the
- the following input values are prepared and processed in the database module DBM: the sum of the occupancy times, vehicle count values, time gaps, duration of the green times of the signal groups, duration of the red time of the signal groups and signal state.
- the following data are then available at the output of the database module: vehicle arrival rate in "red” (ARR), time until the first registration of a signal group in “red” (AR), last time gap LZ before the green termination, count values ZW in red , Occupancy rate (BW) in green and red and time gaps in green.
- the green time requirement module GBM which determines the green time requirement of the individual signal groups, is provided with the following input values: occupancy value BW (in green), count value ZW (in green), time gap ZL before the green termination, time until the first one arrives Vehicle in “Red” (AR), green time requirement old and arrival rate in “Red”.
- occupancy value BW occupancy value
- count value ZW count value
- time gap ZL time gap ZL before the green termination
- AR time until the first one arrives Vehicle in "Red”
- GBA green time requirement old and arrival rate in “Red”.
- the duration of the red time is calculated and made available at the module output.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Traffic Control Systems (AREA)
- Feedback Control In General (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19609680 | 1996-03-12 | ||
| DE19609680 | 1996-03-12 | ||
| PCT/DE1997/000471 WO1997034274A1 (de) | 1996-03-12 | 1997-03-11 | Verkehrsabhängige steuerung von verkehrs-lichtsignalanlagen mit hilfe von fuzzy-logik |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0886845A1 true EP0886845A1 (de) | 1998-12-30 |
| EP0886845B1 EP0886845B1 (de) | 2000-01-12 |
Family
ID=7788044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97916338A Expired - Lifetime EP0886845B1 (de) | 1996-03-12 | 1997-03-11 | Verkehrsabhängige steuerung von verkehrs-lichtsignalanlagen mit hilfe von fuzzy-logik |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0886845B1 (de) |
| AT (1) | ATE188798T1 (de) |
| AU (1) | AU2503697A (de) |
| DE (1) | DE59701006D1 (de) |
| WO (1) | WO1997034274A1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2492886A1 (de) | 2011-02-28 | 2012-08-29 | Siemens Aktiengesellschaft | Verfahren und Lichtsignalanlagen-Steuerungssystem zur Steuerung von Lichtsignalanlagen |
| CN110634308A (zh) * | 2019-09-26 | 2019-12-31 | 同济大学 | 一种基于车辆排队消散时间的单交叉口信号控制方法 |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2169946C2 (ru) * | 1999-07-12 | 2001-06-27 | Красноярская государственная архитектурно-строительная академия | Нейросетевой способ межрайонного координированного управления транспортными потоками |
| DE10021929A1 (de) * | 2000-05-05 | 2001-11-15 | Siemens Ag | Verfahren und Fuzzy-Steuervorrichtung zum rechnergestützten Ermitteln einer Steuerungsstrategie für ein technisches System, Computerlesbares Speichermedium und Computerprogramm-Element |
| WO2001086610A1 (de) * | 2000-05-05 | 2001-11-15 | Siemens Aktiengesellschaft | Verfahren und vorrichtung zum ermitteln einer optimierten auswahl eines rahmensignalplans aus einer menge mehrerer rahmensignalpläne für ein verkehrssystem |
| NL1018875C2 (nl) * | 2001-09-03 | 2003-03-05 | Witteveen & Bos Raadgevende In | Verkeerslichtregeling. |
| DE10208381B4 (de) * | 2002-02-27 | 2005-04-28 | Siemens Ag | Verfahren zum Steuern einer Lichtsignalanlage |
| DE102008049568A1 (de) * | 2008-09-30 | 2010-04-08 | Siemens Aktiengesellschaft | Verfahren zur Optimierung der Verkehrssteuerung an einem lichtsignalgesteuerten Knoten in einem Straßenverkehrsnetz |
| GB0916204D0 (en) | 2009-09-16 | 2009-10-28 | Road Safety Man Ltd | Traffic signal control system and method |
| US8903636B1 (en) | 2013-12-02 | 2014-12-02 | Abdualrahman Abdullah Mohammad Al Kandari | Accident detection system and method for accident detection |
| CN104809892A (zh) * | 2015-04-02 | 2015-07-29 | 南通职业大学 | 一种单交叉口交通信号模糊控制器 |
| CN110634293B (zh) * | 2019-09-26 | 2021-06-04 | 同济大学 | 一种基于模糊控制的干线交叉口控制方法 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1940605A1 (de) * | 1968-08-12 | 1970-02-19 | Ibm | Verfahren zur Steuerung einer Verkehrsampel |
| US5357436A (en) * | 1992-10-21 | 1994-10-18 | Rockwell International Corporation | Fuzzy logic traffic signal control system |
| DE19521927C2 (de) * | 1995-06-09 | 1998-08-06 | Inst Automation Und Kommunikat | Verfahren und Vorrichtung zur verkehrsabhängigen Grünzeitanpassung in einer Verkehrssignalanlage |
-
1997
- 1997-03-11 WO PCT/DE1997/000471 patent/WO1997034274A1/de not_active Ceased
- 1997-03-11 AU AU25036/97A patent/AU2503697A/en not_active Abandoned
- 1997-03-11 AT AT97916338T patent/ATE188798T1/de active
- 1997-03-11 DE DE59701006T patent/DE59701006D1/de not_active Expired - Fee Related
- 1997-03-11 EP EP97916338A patent/EP0886845B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9734274A1 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2492886A1 (de) | 2011-02-28 | 2012-08-29 | Siemens Aktiengesellschaft | Verfahren und Lichtsignalanlagen-Steuerungssystem zur Steuerung von Lichtsignalanlagen |
| DE102011004841A1 (de) | 2011-02-28 | 2012-08-30 | Siemens Aktiengesellschaft | Verfahren und Lichtsignalanlagen-Steuerungssystem zur Steuerung von Lichtsignalanlagen |
| CN110634308A (zh) * | 2019-09-26 | 2019-12-31 | 同济大学 | 一种基于车辆排队消散时间的单交叉口信号控制方法 |
| CN110634308B (zh) * | 2019-09-26 | 2021-09-03 | 同济大学 | 一种基于车辆排队消散时间的单交叉口信号控制方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE188798T1 (de) | 2000-01-15 |
| WO1997034274A1 (de) | 1997-09-18 |
| DE59701006D1 (de) | 2000-02-17 |
| EP0886845B1 (de) | 2000-01-12 |
| AU2503697A (en) | 1997-10-01 |
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