CN1560812A - Auxiliary signal control system for urban level-junction - Google Patents
Auxiliary signal control system for urban level-junction Download PDFInfo
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- CN1560812A CN1560812A CNA2004100061092A CN200410006109A CN1560812A CN 1560812 A CN1560812 A CN 1560812A CN A2004100061092 A CNA2004100061092 A CN A2004100061092A CN 200410006109 A CN200410006109 A CN 200410006109A CN 1560812 A CN1560812 A CN 1560812A
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Abstract
The invention is an assistant signal control system for city plane crossing, the system arranges signal points on the position with distance more than 20 meters to the cross, arranges control wires on position with distance more 50 meters to the crossing, the area between the control wire and the signal point is the control area, it arranges control device on the signal point, the device is made up of distance measuring device, microchip and assistant signal light. According to the car passing through the signal point and the latter car measured by distance measuring device, the assistant signal light sends out control assistant signal. Under control of the assistant signal, the traveling state of the car in the control area is changed from disorder type into order type, guarantees the travel safety on the cross, and upgrades the passing ability of the crossing.
Description
Technical field
The present invention relates to a kind of control technology of city grade crossing auxiliary signal.
Background technology
At present, in urban transportation,, the crossing can be divided into unsignalized intersection and two kinds of signalized intersections are arranged according to having or not traffic control.The unsignalized intersection driver does not have indication or the control determined, and when the driver must own judgement enters the crossing is safe.And the operation characteristic and the traffic capacity of signalized intersections wagon flow are arranged, directly depend on the situation of signal timing dial.But no matter adopt that a kind of mode, it is unordered being in the state that vehicle is exercised before the intersection, and especially when traffic density greatly the time, this unordered situation is more obvious.Highly unordered enforcement state makes and causes the vehicle phase mutual interference that all directions are travelled conflict, thereby reduced the speed of vehicle ', reduced the traffic capacity of intersection.In addition, the disordering of vehicle still causes traffic hazard to influence an important root of traffic safety, and particularly before the bend of the left and right sides of intersection, this harm is bigger.
Signalized intersections is being arranged, and traditional control mode is signal lamp and manpower or the like basically.The city that has has increased the traffic phase place at some critical junctions, and the multi-phase signals control system has also been adopted in the city that has.Adopt these measures, though obtained certain effect, the problem of traffic jam does not solve well.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of city grade crossing auxiliary signal control method is provided, speed by vehicle enforcement before the control crossing, make the vehicle of enforcement before the crossing become orderly state by unordered state, traffic safety before the assurance crossing, reduce the incidence of traffic hazard, improve the traffic capacity of crossing vehicle.
Technical scheme of the present invention:
Greater than 20 meters position, the signalization point greater than 50 meters position, is established control line before signaling point before each intersection of road, and the zone between control line and the signaling point is the control zone.At the signal point position place control device is installed, this device is made up of stadimeter, single-chip microcomputer and auxiliary pilot lamp.In the control procedure, stadia surveying sends auxiliary signal by auxiliary pilot lamp to back vehicle according to the result who measures through the vehicle of signaling point and the distance between its back vehicle.
When the driver passes through the intersection of auxiliary signal control system is installed, under the guide of auxiliary signal, the driver must observe a kind of new traffic rules: 1. when the driver enters the control zone and sees auxiliary control signal, and the traffic lights of this moment is when being green light, and the driver can not arbitrarily quicken, slow down or change direction; When vehicle when the signaling point, if the spacing of vehicle and back vehicle during less than a setting value numerical value, the driver of back vehicle can receive the deceleration instruction that is sent by auxiliary control signal, this moment, the driver just needed to reduce the speed of vehicle.Concrete rule is: condition I: during auxiliary signal before the driver can see the crossing:
(i) when the signal lamp of driver front is green light, two kinds of possibilities are arranged:
(a) go on foot during non-last green light, if vehicle deceleration is l＜d and v
n＞0; Otherwise the speed of a motor vehicle is constant.
(b) go on foot during last green light, the speed of a motor vehicle is constant.
This selection mainly is to consider that in the end a green light is during the step, and whether vehicle did not pass through the crossing before control signal did not influence the crossing.
(ii) when the signal lamp of driver front is red light: randomization, the speed of a motor vehicle is unrestricted.
Condition II: during auxiliary control signal before the driver can't see the crossing: randomization, the speed of a motor vehicle is unrestricted.
Here v
nBe the speed of t moment vehicle, l is the spacing of vehicle and its back vehicle, d
aIt is the parameter that to select.
Beneficial effect of the present invention: the present invention by aided control technology control crossing before the vehicle state of exercising, make under the control of auxiliary signal, the vehicle enforcement state that is in before the crossing in the control zone can be become in order by unordered, traffic safety before the assurance crossing, the traffic capacity of raising crossing vehicle.Especially when traffic density is big, be in the left and right sides bend of intersection before, this control technology is more effective.In addition, controller principle of the present invention is simple, is easy to hardware and realizes that expense is low, applied range.
Description of drawings
Fig. 1 city grade crossing auxiliary signal control system synoptic diagram
Fig. 2 city grade crossing auxiliary signal control system equipment schematic diagram
The time interval data sequence that Fig. 3 measures
During Fig. 4 t=1000, the following distance sequence that before the crossing, records on the major trunk roads
Embodiment
In conjunction with the accompanying drawings embodiments of the present invention are done a detailed description.
Greater than 20 meters position, signalization point 1 greater than 50 meters position, is established control line 4 before signaling point before each intersection of road, and the zone between control line 4 and the signaling point 1 is the control zone.At signaling point 1 place control device is installed, this device is made up of stadimeter 5, single-chip microcomputer 6 and auxiliary pilot lamp 7.In the control procedure, stadimeter 5 is measured through the vehicle 2 of signaling point 1 and the distance between its back vehicle 3, according to the numerical value that records, sends auxiliary control signal by 7 pairs of back vehicle 3 of auxiliary pilot lamp.
Among Fig. 1, vehicle 2 is the vehicle through signaling point 1, and vehicle 3 is the nearest vehicles in vehicle 2 back, and l is the distance between them.In the working control process, stadimeter 5 is at first discerned the vehicle 2 through signaling point, and then between the car 3 of measuring vehicle 2 and its back apart from l, apart from l during less than a concrete numerical value (this root of number border situation is factually set in advance), auxiliary pilot lamp 7 sends the signal of deceleration for vehicle 3 when measured.At this moment, after the driver of vehicle 3 sees reduce-speed sign, slow down.
In the actual moving process, stadimeter 5 is at first discerned the vehicle through signaling point, and measure through the vehicle of signaling point and the spacing of its back vehicle, give single-chip microcomputer with these information feedback then, after handling by analysis, single-chip microcomputer determines whether to send the steering order of deceleration, and these instructions are issued auxiliary pilot lamp, send relevant reduce-speed sign for the nearest vehicle of vehicle back by auxiliary pilot lamp at last through signaling point.Adopt the control technology of this form, simple, can control the enforcement state that is in the vehicle in the control zone before the crossing effectively, it is become in order by unordered.
Experimental simulation:
Experimental simulation is to use the traffic flow modes of cellular Automation Model before to major trunk roads crossing in the urban traffic network to carry out.The enforcement state of vehicle on the major trunk roads before primary study major trunk roads and the by-path crossing.The result of experimental simulation shows that when traffic density was low, under the effect of auxiliary control signal, the dynamics state of traffic flow did not have obvious variation before the crossing.And when traffic density was in the intermediate density value of some row, auxiliary control signal had conclusive effect to the enforcement state of vehicle.With this understanding, when traffic lights was green light, the dynamics state of vehicle can change uniform traffic flow modes from synchronous traffic flow modes into before the crossing.In real traffic system, in general, when the density of vehicle is low, on the road motion of vehicle relatively simple, and when traffic density is in the intermediate density value, often be easy to generate driving accident and traffic jam phenomenon.In this case, bring into play the effect of auxiliary control signal effectively, reduce traffic hazard and improve the traffic capacity.
In the process of experimental simulation, the time interval sequence of a certain position measurement vehicle on major trunk roads in the preceding control zone, crossing, the density of vehicle are taken as medium numerical value density, are 0.3.Figure 3 shows that the time interval data sequence that measures, the abscissa of Fig. 3 is the vehicle number through test point, and ordinate is a time interval.The variation of discovery time distance is periodic in a period of time as seen from Figure 3, and in other time range be at random or remain 1 (remaining the state that 1 correspondence traffic jam).This periodic when changing corresponding green light the time interval before the crossing change, it has shown under the effect of control signal, before the crossing dynamics state of vehicle from unordered become orderly.Also can at a time measure the distribution of vehicle space distance on the road surface.When Figure 4 shows that t=1000, the following distance sequence that before the crossing, records on the major trunk roads, this vehicle number of the abscissa of Fig. 4 through test point, ordinate is the space distance.The space that the result of Fig. 4 shows vehicle on the road surface is periodic in a segment limit apart from changing, the vehicle distribution when its correspondence green light the preceding control zone, crossing in, and in other time range, be at random or remain 1.This periodic variation explanation auxiliary control signal has changed the distribution of vehicle on the road surface, make vehicle before the crossing distribution by unordered become orderly.
Claims (1)
1. city grade crossing auxiliary signal control system, it is characterized in that: before each intersection of road greater than 20 meters position, if signaling point (1), before signaling point greater than 50 meters position, if control line (4), zone between control line (4) and the signaling point (1) is the control zone, and control device is installed at the signal point position place, and this device is made up of stadimeter (5), single-chip microcomputer (6) and auxiliary pilot lamp (7).Record through the vehicle (2) of signaling point and the distance between its back vehicle (3) according to stadimeter (5), vehicle (3) is sent the control auxiliary signal by auxiliary pilot lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410006109 CN1228745C (en) | 2004-03-03 | 2004-03-03 | Auxiliary signal control system for urban level-junction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410006109 CN1228745C (en) | 2004-03-03 | 2004-03-03 | Auxiliary signal control system for urban level-junction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1560812A true CN1560812A (en) | 2005-01-05 |
| CN1228745C CN1228745C (en) | 2005-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410006109 Expired - Fee Related CN1228745C (en) | 2004-03-03 | 2004-03-03 | Auxiliary signal control system for urban level-junction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104851306A (en) * | 2015-05-22 | 2015-08-19 | 北京交通大学 | City road signal indicating lamp auxiliary system |
| CN113593270A (en) * | 2021-08-17 | 2021-11-02 | 广州小鹏汽车科技有限公司 | Vehicle driving control method, control device, and storage medium |
-
2004
- 2004-03-03 CN CN 200410006109 patent/CN1228745C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104851306A (en) * | 2015-05-22 | 2015-08-19 | 北京交通大学 | City road signal indicating lamp auxiliary system |
| CN113593270A (en) * | 2021-08-17 | 2021-11-02 | 广州小鹏汽车科技有限公司 | Vehicle driving control method, control device, and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1228745C (en) | 2005-11-23 |
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Granted publication date: 20051123 |