CN201796499U - Fuzzy controller for traffic system - Google Patents
Fuzzy controller for traffic system Download PDFInfo
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- CN201796499U CN201796499U CN2010201273982U CN201020127398U CN201796499U CN 201796499 U CN201796499 U CN 201796499U CN 2010201273982 U CN2010201273982 U CN 2010201273982U CN 201020127398 U CN201020127398 U CN 201020127398U CN 201796499 U CN201796499 U CN 201796499U
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Abstract
The utility model discloses a fuzzy controller for a traffic system, aiming to simulate thinking of experienced traffic polices directing the traffic so as to realize fine control effect. The traffic system comprises traffic lights, a plurality of sensors and a plurality of counters, wherein the sensors are respectively arranged at the near end and the far end of each of entrance lanes to detect vehicles entering or exiting the entrance lanes, and detection results are transmitted to the counters in a pulsing manner so as to determine traffic flow of each of the entrance lanes. The fuzzy controller is electrically connected with the traffic lights and comprises a fuzzy control table module and a control module, wherein the fuzzy control table module is used for building a fuzzy control table according to the fuzzy control rule, the control module is used for searching corresponding fuzzy time in the fuzzy control table according to the traffic flows of different entrance lanes determined by the counters, and control working states of the traffic lights in different directions are controlled according to the fuzzy time.
Description
Technical field
The utility model relates to a kind of traffic system fuzzy controller.
Background technology
Traffic system is one and has randomness, ambiguity and probabilistic complication system, so the unusual difficulty of the foundation of its mathematical model, sometimes even can't be described with existing mathematical method.Even through repeatedly simplifying the mathematical model set up, finding the solution of it also must be simplified calculating and just can finish.So classical control method is difficult to obtain satisfied effect.Fuzzy control is a kind of control method that need not mathematical model, and the thinking when it can imitate experienced traffic police and directs traffic reaches excellent control effect.
The utility model content
Fundamental purpose of the present utility model is to provide a kind of traffic system fuzzy controller, and the thinking when directing traffic to imitate experienced traffic police reaches excellent control effect.
In the utility model, this traffic system comprises traffic lights, and also comprise a plurality of sensor sum counters, each sensor is divided into the near-end of each entrance lane and far-end detecting the vehicle that each entrance lane arrives and leaves, and with the testing result burst transmissions to the vehicle flowrate of counter with each entrance lane of determining; This fuzzy controller is electrically connected with above-mentioned counter and traffic lights, comprising:
The fuzzy control table module is used for setting up fuzzy control table according to fuzzy control rule;
Control module is used for the vehicle flowrate according to each definite entrance lane of each counter, searches corresponding with it Fuzzy Time in this fuzzy control table, and controls the duty of each traffic lights of all directions according to this Fuzzy Time.
In a specific embodiment, described sensor and traffic lights are divided into all directions all directions of crossroad, above-mentioned control module then specifically is used for calculating ambiguity period and split according to the vehicle flowrate of each definite entrance lane of each counter, and searches this fuzzy control table to determine Fuzzy Time according to this ambiguity period and split; Wherein, described split is the ratio of the total vehicle flowrate of total vehicle flowrate of east-west direction and North and South direction; The total vehicle flowrate sum of described ambiguity period and east-west direction and North and South direction is and increases progressively relation.
In a specific embodiment, above-mentioned control module comprises:
The green light craspedodrome unit of North and South direction, be used for the Fuzzy Time of keeping straight on according to the North and South direction green light that this ambiguity period and split find out at this fuzzy control table, and, calculate the green light craspedodrome time of North and South direction with Fuzzy Time and set time stack that this North and South direction green light is kept straight on; And
The green light craspedodrome unit of east-west direction, be used for the Fuzzy Time of keeping straight on according to the east-west direction green light that this ambiguity period and split find out at this fuzzy control table, and, calculate the green light craspedodrome time of east-west direction with Fuzzy Time and set time stack that this east-west direction green light is kept straight on.
Preferable, also be connected with timer between described sensor and the counter, and described counter only after this sensor of correspondence continues closed 0.5 second just with this burst transmissions to counter, disturb and shake thereby can effectively eliminate, guaranteed the stability and the reliability of this Fuzzy control system operation.Described counter only this sensor of correspondence continue closed duration be equal to or greater than behind the fixed duration just with this burst transmissions to counter.
Preferable, above-mentioned fuzzy controller can be provided with the fuzzy control law of two covers and blur control table with two covers that foundation corresponds respectively to day and night, and described fuzzy controller also is used for determining earlier the objective fuzzy control table before tabling look-up; Like this then can further improve the operational efficiency of this Fuzzy control system.
In the utility model, described fuzzy controller can be selected from Programmable Logic Controller, with high reliability that has according to it and stability and the reliability of having guaranteed this Fuzzy control system operation than strong anti-interference ability.
The traffic system fuzzy controller that the utility model provides when the volume of traffic increases gradually, can reduce effectively and incur loss through delay train commander and vehicle mean delay time.
Description of drawings
The structured flowchart of the traffic system that Fig. 1 provides for the utility model embodiment;
Fig. 2 arranges synoptic diagram for the crossroad components and parts that the utility model embodiment provides.
Specific embodiment
Below in conjunction with Figure of description embodiment of the present utility model is done detailed description.
The fuzzy controller that a preferred embodiment of the present utility model provides is applied in the traffic system of traffic lights of control crossroad as shown in Figures 1 and 2, and this traffic system comprises:
Traffic lights are located at all directions all directions of crossroad, and are made up of red, yellow, green three kinds of traffic lights.
Sensor is located at the near-end and the far-end of each entrance lane.
As shown in Figure 2, this sensor is made up of sensor 1 to sensor 8, is respectively applied for the detection vehicle that thing is kept straight on and the north and south Through Lane arrives and leaves that respectively enters the mouth, and with the testing result burst transmissions to the vehicle flowrate of counter with each entrance lane of determining.Wherein, in each track, a sensor is located at the place, crossroad, is used to detect the vehicle number that leaves; Another is located at apart from the about 100m of first sensor place, is used to detect the vehicle number of arrival; Arrive as vehicle, this sensor closure, in order to prevent shake, eliminate and disturb, as shown in Figure 1, also be connected with timer between this sensor and the counter, this timer fixed duration be 0.5s, and counter only after this sensor of correspondence continues closed 0.5 second just with this burst transmissions to counter, guarantee the stability and the reliability of this Fuzzy control system operation with this.
The fuzzy controller that present embodiment provides, it is selected from the high reliability that has and than the Programmable Logic Controller (PLC) of strong anti-interference ability, is used for the calculation control variable, carries out fuzzy quantization and handle, be provided with fuzzy control rule and carry out operations such as fuzzy reasoning and sharpening processing.Mainly comprise:
The fuzzy control table module is used for setting up fuzzy control table according to fuzzy control rule; Wherein, this fuzzy control rule can extract from historical data, or rule of thumb value is provided with flexibly;
Control module, be used for calculating ambiguity period and split according to the vehicle flowrate of each definite entrance lane of each counter, and search this fuzzy control table determining the green time and the red time of all directions, and control the duty of each traffic lights with this time according to this ambiguity period and split.
In the present embodiment, sensor 1 and sensor 2 and corresponding timer and counter cooperate counting this crossroad direction vehicle flowrate (and vehicle number) of keeping straight on from east to west, and sensor 3 and sensor 4 and corresponding timer and counter cooperation are to count this crossroad vehicle flowrate of direction craspedodrome from west to east; In like manner, sensor 5 and sensor 6 and corresponding timer and counter cooperate counting this crossroad direction vehicle flowrate of keeping straight on from south to north, and sensor 7 and sensor 8 and corresponding timer and counter cooperation are to count the vehicle flowrate of this crossroad north-to-south direction craspedodrome.Wherein, above-mentioned described split is the ratio of the total vehicle flowrate of total vehicle flowrate of east-west direction and North and South direction, above-mentioned ambiguity period is then decided by east-west direction and the total vehicle flowrate sum of North and South direction, usually, this ambiguity period and west to and the total vehicle flowrate sum of North and South direction be and increase progressively relation.
Corresponding with it, the fuzzy controller in the present embodiment (as shown in Figure 1) comprises at least:
The green light craspedodrome unit of North and South direction, be used for the Fuzzy Time of keeping straight on according to the North and South direction green light that this ambiguity period and split find out at this fuzzy control table, and the Fuzzy Time that this North and South direction green light is kept straight on and set time are (wherein, this set time is that Fuzzy Time is the bright time of the green light of the North and South direction under 0 state), the green light that calculates North and South direction is kept straight on the time;
The green light craspedodrome unit of east-west direction, be used for the Fuzzy Time of keeping straight on according to the east-west direction green light that this ambiguity period and split find out at this fuzzy control table, and the Fuzzy Time that this east-west direction green light is kept straight on and set time are (wherein, this set time is that Fuzzy Time is the bright time of the green light of the east-west direction under 0 state) stack, the green light that calculates east-west direction is kept straight on the time.
Preferable, the Fuzzy control system of above-mentioned traffic lights also comprises the PC with the fuzzy controller work compound, this PC is internal or external to have register effectively to store with current the variable factor and steering order to this traffic system, and have the CPU of this PC reasonably to transmit, scheduling of resource and execution.
Supplementary notes be, be simplified design, the control of present embodiment is turned left for East and West direction and turn left in the north-south traffic lights is main adopts existing timing controlled mode to carry out.But protection domain of the present utility model is not limited thereto, and in other embodiment, also can set up sensor and counter and add up the vehicle flowrate that East and West direction is turned left and turn left in the north-south, and carry out corresponding with it fuzzy control with this.
Traffic system that present embodiment provides and fuzzy controller thereof, trial run and on-the-spot test have been passed through at certain crossing, and compare with traditional time control method, comparative result shows: less or during near the desired amount of regularly timing in traffic flow, fuzzy control and time control method there is no too big difference, and when the volume of traffic increases gradually, the advantage of the fuzzy control of native system is just obviously got up, can reduce effectively and incur loss through delay train commander and vehicle mean delay time, the wherein more time-controlled respectively minimizing 6.74% of the mean delay of North and South direction and east-west direction and 5.32%.
More than; it only is preferred embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain that claim was defined.
Claims (5)
1. traffic system fuzzy controller, this traffic system comprises traffic lights, it is characterized in that, this traffic system also comprises a plurality of sensor sum counters, each sensor is divided into the near-end of each entrance lane and far-end detecting the vehicle that each entrance lane arrives and leaves, and with the testing result burst transmissions to the vehicle flowrate of counter with each entrance lane of determining; This fuzzy controller is electrically connected with above-mentioned counter and traffic lights, comprising:
The fuzzy control table module;
Control module is used for the vehicle flowrate according to each definite entrance lane of each counter, searches corresponding with it Fuzzy Time in this fuzzy control table, and controls the duty of each traffic lights of all directions according to this Fuzzy Time.
2. traffic system fuzzy controller according to claim 1 is characterized in that described fuzzy controller is selected from Programmable Logic Controller.
3. traffic system fuzzy controller according to claim 1, it is characterized in that, also be connected with between described sensor and the counter and eliminate disturb and timer use in shake, and described counter only the lasting closed duration of this sensor of correspondence be equal to or greater than behind the fixed duration just with this burst transmissions to counter.
4. traffic system fuzzy controller according to claim 1 is characterized in that, described traffic lights comprise red, yellow, green three kinds of traffic lights of being located at all directions.
5. traffic system fuzzy controller according to claim 1 is characterized in that, also comprises the PC that is connected with this fuzzy controller, and this PC is internal or external register.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201273982U CN201796499U (en) | 2010-03-10 | 2010-03-10 | Fuzzy controller for traffic system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201273982U CN201796499U (en) | 2010-03-10 | 2010-03-10 | Fuzzy controller for traffic system |
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| CN201796499U true CN201796499U (en) | 2011-04-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102646336A (en) * | 2012-05-04 | 2012-08-22 | 山东理工大学 | Control system of real-time traffic indicating lights |
| CN104867335A (en) * | 2014-02-24 | 2015-08-26 | 王群力 | Intelligent traffic signal control system |
| CN106205121A (en) * | 2016-07-18 | 2016-12-07 | 首都师范大学 | Based on fuzzy logic and the data transmission method of network code |
| CN111785042A (en) * | 2020-07-01 | 2020-10-16 | 浙江工商大学 | Traffic flow detection and automatic traffic light duration adjusting method based on ZigBee |
-
2010
- 2010-03-10 CN CN2010201273982U patent/CN201796499U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102646336A (en) * | 2012-05-04 | 2012-08-22 | 山东理工大学 | Control system of real-time traffic indicating lights |
| CN104867335A (en) * | 2014-02-24 | 2015-08-26 | 王群力 | Intelligent traffic signal control system |
| CN106205121A (en) * | 2016-07-18 | 2016-12-07 | 首都师范大学 | Based on fuzzy logic and the data transmission method of network code |
| CN106205121B (en) * | 2016-07-18 | 2018-09-14 | 首都师范大学 | Data transmission method based on fuzzy logic and network code |
| CN111785042A (en) * | 2020-07-01 | 2020-10-16 | 浙江工商大学 | Traffic flow detection and automatic traffic light duration adjusting method based on ZigBee |
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| Date | Code | Title | Description |
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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: 20110413 Termination date: 20120310 |