CN108417053A - A kind of photoelectric detection system and control method suitable for T-junction mouth - Google Patents
A kind of photoelectric detection system and control method suitable for T-junction mouth Download PDFInfo
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- CN108417053A CN108417053A CN201810158931.2A CN201810158931A CN108417053A CN 108417053 A CN108417053 A CN 108417053A CN 201810158931 A CN201810158931 A CN 201810158931A CN 108417053 A CN108417053 A CN 108417053A
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- 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
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/04—Detecting movement of traffic to be counted or controlled using optical or ultrasonic detectors
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/065—Traffic control systems for road vehicles by counting the vehicles in a section of the road or in a parking area, i.e. comparing incoming count with outgoing count
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Abstract
The present invention discloses transit equipment device and a kind of photoelectric detection system and control method suitable for T-junction mouth in traffic control method field, photoelectric detection system is made of laser emitter, signal receiver, control unit and traffic lights, each crossing of T-junction mouth need to by each track of Signalized control upstream end and be driven out to end and be respectively provided with a laser emitter and a corresponding signal receiver；It is long for being unidirectionally lined up, the smaller T-junction mouth of remaining direction wagon flow, intersection all directions queue length can be detected in real time and intersection reaches queuing and overflows the undergone time, it can also detect the data such as time headway, vehicle flowrate simultaneously, required component is more universal, of low cost, it is smaller to road damage degree when installation, easy to maintain, testing result is accurate, is not influenced by factors such as bad weather, night deficiencies.
Description
Technical field
The invention belongs to transit equipment devices and traffic control method field, are particularly suitable for the traffic of T-junction mouth
Signal control device and method.
Background technology
With the development of intelligent transportation, foundation detects obtained intersection traffic flow data, Traffic signal control in real time
Scheme carry out the traffic light control system of dynamic self-adapting pattern of dynamic optimization and be applied.Existing dynamic is adaptive
The method for controlling traffic signal lights of pattern is answered, typically sensor detector is arranged in crossing inlet road upstream, to obtain
Traffic flow data optimizes signal phase green time, and this method can not effectively identify real-time vehicle on entrance driveway
Queueing condition, i.e. queue length, and reach the time that certain queue length is undergone.Current Vehicle Detection equipment is more
It is commonly pressure-responsive device and video detecting device, but pressure-responsive device mainly has three big disadvantages：First, pressure-responsive
Device need to generally be embedded in underground, and road damage area is big；It is sensed second is that being crossed by vehicle and generating pressure, great Liang Che
It is fragile to cross voltage sensitive sensor；Once third, generating pressure on road surface, data will show motor vehicle process, however more
Crossing for axis vehicle can mislead to the number of vehicles of detection, and the pressure that pedestrian or non-motor vehicle generate here also can
It is mistaken for motor vehicle.And video detecting device testing result is easily influenced by adverse weather, night deficiency etc., and safeguard not
Just, cost is higher.Existing Signalized control method is typically the constant fixed mode of the signal phase red time at crossing, is lacked
The signal timing plan adjusted less for the real-time vehicle queue situation of T-junction mouth.
Invention content
The present invention waits for vehicle excessive for the unidirectional vehicle queue in T-type crossing, occurs being lined up spilling and motor vehicle often
Secondary or even the phenomenon that capable of being just driven out to intersection of stopping three times is needed, a kind of Photoelectric Detection suitable for T-junction mouth is provided
Device, and propose a kind of method for adjusting Signalized control in real time according to the data that the detection device provides.
A kind of photoelectric detection system suitable for T-junction mouth of the present invention the technical solution adopted is that：By laser
Transmitter, signal receiver, control unit and traffic lights composition, need to be by Signalized control at each crossing of T-junction mouth
Each track upstream end and be driven out to end and be respectively provided with a laser emitter and a corresponding signal receiver, Laser emission
The cooperation of device and corresponding signal receiver measure by vehicle number, it is single that the output end of each signal receiver is all connected with control
The input terminal of member, output end connection control south orientation crossing, three traffic of north orientation crossing and west to crossing respectively of control unit
Signal lamp.
The technical solution that a kind of control method of photoelectric detection system suitable for T-junction mouth of the present invention uses
It is to include the following steps：
Step 1：Control unit receives the signal of each signal receiver, and southern straight trip st, north straight trip nt, south left-hand rotation is calculated
The vehicle number f that sl, this four direction entrance driveway of western left-hand rotation wl are detained in entrance driveway after the i-th period green lightst、fnt、fsl、
fwl；
Step 2：When control unit receives the red signal of a direction, control unit starts timing, until the direction into
The real-time queuing vehicle number in mouth road is equal to the maximum queue length of setting or stops meter at the time of receiving red light end signal
When；
Step 3：Control unit turns left to south straight trip, north straight trip, south, western left-hand rotation entrance driveway during the red signal in the i-th period
Real-time queuing vehicle number gst、gnt、gsl、gwlTurn left with south straight trip, north straight trip, south, the queuing vehicle number of western left-hand rotation entrance driveway setting
Mesh upper limit Sst、Snt、Ssl、SwlIt is compared, judges whether gst≥Sst、gnt≥Snt、gsl≥SslOr gwl≥Swl, tied according to judgement
Fruit stops timing；
Step 4：Respectively at the end of the red signal of position, control unit is by real-time queue length on corresponding each track according to judgement
As a result stop the queuing upper limit value of timing and setting relatively and judge whether to be lined up to reach the upper limit, signal is controlled according to judging result
Lamp；
Step 5：At the end of the i-th period each phase red signal, control unit is calculated by driving into south to the i-th end cycle
Straight trip, north straight trip, south turn left, the western total train number of left-hand rotation entrance driveway, and by the i-th end cycle be driven out to south straight trip, north straight trip,
South left-hand rotation, the western total train number of left-hand rotation entrance driveway.
The advantageous effect that highlights is after the present invention uses above-mentioned technical proposal：
1, the present invention is long for being unidirectionally lined up, and it is each can to detect intersection in real time for the smaller T-junction mouth of remaining direction wagon flow
Direction queue length and intersection, which reach to be lined up, overflows the undergone time, while can also detect time headway, vehicle flowrate
Etc. data, and required component is more universal, of low cost, easy to maintain, detection smaller to road damage degree when installation
As a result precisely, do not influenced by factors such as bad weather, night deficiencies.
2, the present invention can be detected crossing inlet road in a certain period to obtain vehicle queue data, change in real time
The Signalized control scheme in next period has specific aim and real-time, can improve effect of the T-type mouth vehicle by stop line
Rate avoids a direction queuing spilling and vehicle from being repeatedly lined up.
Description of the drawings
Fig. 1 is that a kind of photoelectric detection system suitable for T-junction mouth of the present invention is mounted at T-junction mouth
Arrangement schematic diagram；
Fig. 2 is the control block diagram of photoelectric detection system shown in FIG. 1；
Fig. 3 is control method flow chart shown in FIG. 1；
Description of symbols in figure：1,2,3. traffic lights；4,5,6,7,8,9,10,11. laser emitter, 12,13,14,15,
16,17,18,19. signal receiver；22. control unit.
Specific implementation mode
As depicted in figs. 1 and 2, T-junction is the T-junction mouth in two-way two track, and the present invention is with north-south shown in FIG. 1
For main road, west is to for the T-junction mouth for bypass.South orientation crossing（S）, north orientation crossing（N）, west is to crossing（W）T-junction
For mouthful.Wherein south orientation crossing（S）Entrance driveway have a Through Lane（st）With a left turn lane（sl）, north orientation crossing
（N）Entrance driveway have a right-turn lane（nr）With a Through Lane（nt）, the right-turn lane at north orientation crossing is not by signal lamp
Control；West is to crossing（W）Entrance driveway have a right-turn lane（wr）With a left turn lane（wl）, right-hand rotation vehicle of the west to crossing
Road is not by Signalized control.T-type crossing easily occur be lined up spillover, therefore the straight going on main road at T-type crossing, main road turn left and
The section of specific length is chosen in the track that bypass turns left on three directions, and institute of the present invention is all installed on each track in each section
The photoelectric detection system stated.
Photoelectric detection system of the present invention is by laser emitter, signal receiver, control unit and traffic lights
Composition.It need to be swashed with each installation in end one is driven out to by the upstream end in each track of Signalized control at each crossing of T-junction mouth
Optical transmitting set and a corresponding signal receiver.Laser emitter is all mounted under road surfaces, and road surface need to reserve hole for laser
It projects and is needed when mounted in view of can effectively stop laser when preventing the overlapping of multiple laser propagation path and vehicle from passing through
Propagation path.Such as Fig. 1, a laser emitter 4, a left side are installed at the roadmarking of the upstream end of the Through Lane at south orientation crossing
One laser emitter 5 is installed, in the nearest street lamp or isolation close to laser emitter 4,5 at the roadmarking changed trains or buses
Installation is corresponding to signal receiver 12, the signal receiver 13 of laser emitter 4,5, the laser photograph of laser emitter 4 on guardrail
It is incident upon signal receiver 12；The laser irradiation of laser emitter 5 is to signal receiver 13.Laser emitter 4 and signal receiver
12 cooperations can measure the vehicle number into the section first lane, and laser emitter 5 can be distinguished with the cooperation of signal receiver 13
Measure the vehicle number into the Through Lane and left turn lane at south orientation crossing.Through Lane at south orientation crossing is driven out to end
Laser emitter 8 is installed at the roadmarking of Through Lane, installation laser emitter 9 at the roadmarking of left turn lane, by
Corresponding signal receiver 16, signal receiver 17 are installed on the nearest street lamp or isolation guardrail of nearly laser emitter 8,9.
Similarly, west to the left turn lane upstream end at crossing installation laser emitter 7 and corresponding signal receiver 15, be driven out to end peace
Laser emitter 11 and corresponding signal receiver 19 are filled, the Through Lane upstream end at north orientation crossing installs 6 He of laser emitter
Corresponding signal receiver 14 is driven out to end installation laser emitter 10 and corresponding signal receiver 18.
As shown in Fig. 2, the output end of each signal receiver 12,13,14,15,16,17,18,19 is all connected with control unit
22 input terminal.When vehicle crosses, the propagation path of laser is stopped, to occur in laser at signal receiver
Disconnected, the optical signal of detection is converted to and voltage signal is passed to control unit 22 after voltage signal by each signal receiver.
Control unit 22 is mountable in a certain traffic light post in crossing.The output end of control unit 22 connects three traffic signals
Lamp, three traffic lights are control south orientation crossing respectively（S）Traffic signals 1, control north orientation crossing（N）Traffic lights
2 is western to crossing with control（W）Traffic lights 3.Control unit 22 is filtered the signal of input, calculate after obtain certain section
The number of vehicles in section in three moment straight going on main road, main road left-hand rotation and bypass left-hand rotation directions, to which control unit 22 is judged
Each section vehicle queue situation, and tell which section occurs to be lined up spilling, to adjusted.It is reached according to the section
To the time of saturation, the red light and long green light time of the road section traffic volume signal lamp are adjusted in real time, and are controlled each traffic lights and made
Corresponding to change, the unidirectional vehicle queue to alleviate the section overflows situation.
There are one phase wagon flows in these three phases that control unit 22 only controls straight going on main road, main road turns left, bypass turns left
Measure the more unidirectional congestion of appearance.Phase rule is：Phase one is main road（North and south）Straight trip, phase is second is that main road（South orientation）Turn left,
Phase three is bypass（West to）Turn left.Also, the red time point for these three phases that straight going on main road, main road are turned left, bypass turns left
T is not usedr1、tr2、tr3It indicates, straight going on main road, main road are turned left, bypass turns left, and three phase minimum green times are respectively t01、t02、
t03.The when a length of T in each period immobilizes.Referring to Fig. 3, the specific rate-determining steps of control unit 22 are as follows：
Step 1：At a time, in the case of T-type crossing all directions entrance driveway as shown in Figure 1 is without vehicle, control unit 22 is to sailing
Enter south straight trip, north is kept straight on, south is turned left, total train number M of western left-hand rotation entrance drivewayi st、Mi nt、Mi sl、Mi wlZero is driven out to south straight trip, north
It keeps straight on, south is turned left, total train number N of western left-hand rotation entrance drivewayi st、Ni nt、Ni sl、Ni wlZero is currently located cycle count i zeros, week
Phase a length of T when fixing.Since all zeros datas, control unit starts counting up, thus current period be the period 1, first
South straight trip was driven into before period, north is kept straight on, south is turned left, the total train number initial value M of western left-hand rotation entrance driveway0 st、M0 nt、M0 sl、M0 wlIt is 0, sails
Go out south straight trip, north is kept straight on, south is turned left, the total train number initial value N of western left-hand rotation entrance driveway0 st、N0 nt、N0 sl、N0 wlIt is 0.
Step 2：In view of the interference of the objects such as pedestrian and rubbish, control unit 22 is by the break period in input signal
Shorter or speciality signal filters out, obtain the i-th period south straight trip st, north straight trip nt, southern left-hand rotation sl, in western left-hand rotation wl entrance driveway
The train number driven into green time is respectively xst、xnt、xsl、xwl；The straight trip of i-th cycle south, north straight trip, south is turned left, west is turned left
The train number being driven out in green time in entrance driveway is respectively yst、ynt、ysl、ywl.South straight trip, north straight trip, south were driven into before i-th period
Turn left, the total train number initial value of western left-hand rotation entrance driveway is Mi-1 st、Mi-1 nt、Mi-1 sl、Mi-1 wl, be driven out to south straight trip, north straight trip, south turn left,
The western total train number initial value of left-hand rotation entrance driveway is Ni-1 st、Ni-1 nt、Ni-1 sl、Ni-1 wl。
South straight trip is calculated through following formula in control unit 22, north is kept straight on, south is turned left, west is turned left, and this four direction entrance driveway exists
The vehicle number f being detained in entrance driveway after i-th period green lightst、fnt、fsl、fwlRespectively：
fst=Mi-1 st+xst-(Ni-1 st+yst),
fnt= Mi-1 nt +xnt-( Ni-1 nt +ynt),
fsl= Mi-1 sl +xsl-( Ni-1 sl +ysl),
fwl= Mi-1 wl +xwl-( Ni-1 wl +ywl) 。
Step 3：When control unit 22 receives the red signal of a direction, control unit 22 starts timing, until
The real-time queuing vehicle number of direction entrance driveway, which is equal to the vehicle number of the maximum queue length of setting or receives red light, to be terminated
Stop timing at the time of signal, south straight trip, north straight trip, the time timing that south is turned left, west is turned left are respectively tst、tnt、tsl、twl。
Each entrance driveway upstream end laser emitter coordinates with corresponding signal receiver, and signal is passed to control by signal receiver
Unit 22 processed, south straight trip, north straight trip, south are turned left, are driven into western left-hand rotation entrance driveway during control unit 22 counts the i-th period red light
Real-time accumulated train number zst、znt、zsl、zwl.In the present invention, control unit 22 judges to receive vehicle during the i-th period red light
Signal is driven into, then the accumulative train number in respective inlets road adds 1, and then south straight trip, north are kept straight on, south is turned left, are sailed in western left-hand rotation entrance driveway
The real-time accumulated train number z enteredst、znt、zsl、zwlValue real-time change.
To which real-time queuing vehicle during the i-th period of each entrance driveway red signal is calculated through following formula in control unit 22
Number, respectively：
gst=fst+zst,
gnt=fnt+znt,
gsl=fsl+zsl,
gwl=fwl+zwl。
Step 4：Control unit 22 is during the red signal in the i-th period, to south straight trip, north straight trip, south are turned left, west is turned left
The real-time queuing vehicle number g of entrance drivewayst、gnt、gsl、gwlTurn left with south straight trip, north straight trip, south, the row of western left-hand rotation entrance driveway setting
Team number of vehicles upper limit Sst、Snt、Ssl、SwlIt is compared, judges whether gst≥Sst、gnt≥Snt、gsl≥SslOr gwl≥Swl, root
It is judged that result stops timing, signal lamp is controlled.By taking there is congestion in straight going on main road as an example：When straight going on main road is red in the i-th period
During lamp, there is gst=Sst, control unit 22 stop to south straight trip direction time timing, obtain tst.Control unit 22 continues
To north straight trip entrance driveway timing, if there is g during red light in the north straight trip real-time accumulated queuing number of entrance drivewaynt=Snt, it is same as above
To tnt；If arriving red light finish time, gntStill it is less than Snt, stop timing, export tntValue is equal to red time.
Step 5：Respectively at the end of the red signal of position, control unit 22 is by real-time queue length on corresponding each track
Relatively and judge whether to be lined up and reach the upper limit with the queuing upper limit value of setting, timing is stopped according to judging result, controls signal lamp.
Judging result mainly has following four situation：
Situation one：Straight going on main road, main road are turned left and bypass turns left all not up to be lined up the upper limit.
At the end of red light, work as gst<Sst, gnt<Snt, gsl<Ssl, gwl<Swl, it is believed that each phase queuing is not overflowed, control unit
Signal time distributing conception is not adjusted, uses the signal timing dial time of acquiescence.
Situation two：Main road, which turns left to be lined up, reaches the upper limit.
At the end of red light, work as gst<Sst, gnt<Snt, gsl≥Ssl, gwl<Swl, it is believed that main road, which turns left to be lined up, reaches the upper limit.
Control unit 22, which reaches southern left-hand rotation direction, is lined up upper limit time tslWith straight going on main road phase minimum green time
t01, bypass left turn phase minimum green time t03The sum of be compared, if tsl≥t01+t03, then next cycle main road left-hand rotation
Direction red time tr2=tsl, non-red time is T-tsl；If tsl<t01+t03, not influence the logical of other two phase vehicles
Row, next cycle main road left-hand rotation direction red time tr2= t01+t03, non-red time is T-（t01+t03）.
Situation three：Bypass, which turns left to be lined up, reaches the upper limit.
At the end of red light, work as gst<Sst, gnt<Snt, gsl<Ssl, gwl≥Swl, it is believed that bypass, which turns left to be lined up, reaches the upper limit.
Control unit 22, which reaches western left-hand rotation direction, is lined up upper limit time twlWith straight going on main road phase minimum green time
t01, main road left turn phase minimum green time t02The sum of be compared, if twl≥t01+t02, then next cycle bypass left-hand rotation
Direction red time tr3=twl, non-red time is T-twl；If twl<t01+t02, not influence the logical of other two phase vehicles
Row, next cycle bypass left-hand rotation direction red time tr3= t01+t02, non-red time is T-（t01+t02）.
Situation four：Straight going on main road, which is lined up, reaches the upper limit.
At the end of red light, work as gst≥Sst、gnt<Snt、gsl<Ssl、gwl<SwlOr gst<Sst、gnt≥Snt、gsl<Ssl、gwl<Swl
Or gst≥Sst、gnt≥Snt、gsl<Ssl、gwl<Swl, when there is any one of three cases above, it is believed that straight going on main road is lined up
Up to the upper limit.Control unit 22, which reaches south straight trip direction, is lined up upper limit time tstReach queuing upper limit time with north straight trip direction
tntIt is compared：
If tst≤tnt, then continue to reach queuing upper limit time t to south straight trip directionstWith main road left turn phase minimum green time
t02, bypass left turn phase minimum green time t03The sum of be compared, if tst≥t02+t03, then next cycle straight going on main road
Direction red time tr1=tst, non-red time is T-tst；If tst<t02+t03, not influence the logical of other two phase vehicles
Row, next cycle straight going on main road direction red time tr1= t02+t03, non-red time is T-（t02+t03）.
If tst>tnt, method is similar to above, repeats no more.
Step 6：At the end of the i-th period each phase red signal, control unit 22 is calculated to be tied by the i-th period
Beam drives into south straight trip, north is kept straight on, south is turned left, the western total train number of left-hand rotation entrance driveway, and southern straight by being driven out to the i-th end cycle
Row, north straight trip, south is turned left, the western total train number of left-hand rotation entrance driveway is respectively：
Mi st =Mi-1 st+xst+ zst,Ni st =Ni-1 st+yst,
Mi nt = Mi-1 nt +xnt+znt,Ni nt = Ni-1 nt +ynt,
Mi sl = Mi-1 sl +xsl+zsl,Ni sl = Ni-1 sl +ysl,
Mi wl = Mi-1 wl +xwl+zwl,Ni wl = Ni-1 wl +ywl。
Step 7：Each phase enters next period, i.e. i+1 period, control unit 22 repeats step 1 to step 6.
Claims (6)
1. a kind of photoelectric detection system suitable for T-junction mouth, it is characterized in that：By laser emitter, signal receiver, control
Unit and traffic lights composition, each crossing of T-junction mouth need to by each track of Signalized control upstream end and sail
Outlet is respectively provided with a laser emitter and a corresponding signal receiver, and laser emitter is matched with corresponding signal receiver
Close measure by vehicle number, the output end of each signal receiver is all connected with the input terminal of control unit, control unit
Output end connection controls three traffic lights of south orientation crossing, north orientation crossing and west to crossing respectively.
2. a kind of control method of photoelectric detection system as described in claim 1, it is characterized in that including the following steps：
Step 1：Control unit receives the signal of each signal receiver, and southern straight trip st, north straight trip nt, south left-hand rotation is calculated
The vehicle number f that sl, this four direction entrance driveway of western left-hand rotation wl are detained in entrance driveway after the i-th period green lightst、fnt、fsl、
fwl；
Step 2：When control unit receives the red signal of a direction, control unit starts timing, until the direction into
The real-time queuing vehicle number in mouth road is equal to the maximum queue length of setting or stops meter at the time of receiving red light end signal
When；
Step 3：Control unit turns left to south straight trip, north straight trip, south, western left-hand rotation entrance driveway during the red signal in the i-th period
Real-time queuing vehicle number gst、gnt、gsl、gwlTurn left with south straight trip, north straight trip, south, the queuing vehicle number of western left-hand rotation entrance driveway setting
Mesh upper limit Sst、Snt、Ssl、SwlIt is compared, judges whether gst≥Sst、gnt≥Snt、gsl≥SslOr gwl≥Swl, tied according to judgement
Fruit stops timing；
Step 4：Respectively at the end of the red signal of position, control unit is by real-time queue length on corresponding each track according to judgement
As a result stop the queuing upper limit value of timing and setting relatively and judge whether to be lined up to reach the upper limit, signal is controlled according to judging result
Lamp；
Step 5：At the end of the i-th period each phase red signal, control unit is calculated by driving into south to the i-th end cycle
Straight trip, north straight trip, south turn left, the western total train number of left-hand rotation entrance driveway, and by the i-th end cycle be driven out to south straight trip, north straight trip,
South left-hand rotation, the western total train number of left-hand rotation entrance driveway.
3. the control method of photoelectric detection system according to claim 2, it is characterized in that：In step 1, vehicle number fst、fnt、
fsl、fwlRespectively：fst=Mi-1 st+xst-(Ni-1 st+yst), fnt= Mi-1 nt +xnt-( Ni-1 nt +ynt), fsl= Mi-1 sl +
xsl-( Ni-1 sl +ysl), xst、xnt、xsl、xwlIt is the i-th period south straight trip st, north straight trip nt, southern left-hand rotation sl, western left-hand rotation wl respectively
The train number driven into green time in entrance driveway；yst、ynt、ysl、ywlIt is the straight trip of the i-th cycle south, north straight trip, Nan Zuo respectively
The train number for turning, being driven out in green time in western left-hand rotation entrance driveway, Mi-1 st、Mi-1 nt、Mi-1 sl、Mi-1 wlIt is to drive into before the i-th period respectively
South straight trip, north are kept straight on, south is turned left, the total train number initial value of western left-hand rotation entrance driveway, Ni-1 st、Ni-1 nt、Ni-1 sl、Ni-1 wlIt is driven out to respectively
South straight trip, north are kept straight on, south is turned left, the total train number initial value of western left-hand rotation entrance driveway.
4. the control method of photoelectric detection system according to claim 3, it is characterized in that：In step 3, real-time queuing vehicle
Number gst、gnt、gsl、gwlRespectively：gst=fst+zst, gnt=fnt+znt, gsl=fsl+zsl, gwl=fwl+zwl, zst、znt、zsl、zwlPoint
The real-time accumulated train number that south straight trip, north straight trip, south are turned left, driven into western left-hand rotation entrance driveway during not being the i-th period red light.
5. the control method of photoelectric detection system according to claim 4, it is characterized in that：In step 4, judging result have with
Lower four kinds of situations：
Situation one：Work as gst<Sst, gnt<Snt, gsl<Ssl, gwl<Swl, straight going on main road, main road, which are turned left, and bypass turns left all not up to arranges
Team's upper limit, each phase queuing are not overflowed, and control unit is not adjusted signal time distributing conception；
Situation two：Work as gst<Sst, gnt<Snt, gsl≥Ssl, gwl<Swl, main road, which turns left to be lined up, reaches the upper limit, and control unit is to southern left-hand rotation side
It is lined up upper limit time t to reachingslWith straight going on main road phase minimum green time t01, bypass left turn phase minimum green time t03
The sum of be compared, if tsl≥t01+t03, then next cycle main road left-hand rotation direction red time tr2=tsl, non-red time is
T-tsl；If tsl<t01+t03, then next cycle main road left-hand rotation direction red time tr2= t01+t03, non-red time is T-
（t01+t03）；
Situation three：Work as gst<Sst, gnt<Snt, gsl<Ssl, gwl≥Swl, bypass, which turns left to be lined up, reaches the upper limit, and control unit is to western left-hand rotation side
It is lined up upper limit time t to reachingwlWith straight going on main road phase minimum green time t01, main road left turn phase minimum green time t02
The sum of be compared, if twl≥t01+t02, then next cycle bypass left-hand rotation direction red time tr3=twl, non-red time is
T-twl；If twl<t01+t02, then next cycle bypass left-hand rotation direction red time tr3= t01+t02, non-red time is T-
（t01+t02）；
Situation four：Work as gst≥Sst、gnt<Snt、gsl<Ssl、gwl<SwlOr gst<Sst、gnt≥Snt、gsl<Ssl、gwl<SwlOr gst≥
Sst、gnt≥Snt、gsl<Ssl、gwl<SwlAny one when, straight going on main road be lined up reach the upper limit, control unit to south straight trip direction reach
To queuing upper limit time tstReach with north straight trip direction and is lined up upper limit time tntIt is compared：If tst≤tnt, then continue straight to south
Line direction, which reaches, is lined up upper limit time tstWith main road left turn phase minimum green time t02, bypass left turn phase minimum green light when
Between t03The sum of be compared, if tst≥t02+t03, then next cycle straight going on main road direction red time tr1=tst, when non-red light
Between be T-tst；If tst<t02+t03, then next cycle straight going on main road direction red time tr1= t02+t03, non-red time is
T-（t02+t03）.
6. the control method of photoelectric detection system according to claim 5, it is characterized in that：In step 5, drive into south straight trip,
North straight trip, south turn left, the total train number of western left-hand rotation entrance driveway and by the i-th end cycle be driven out to south straight trip, north straight trip, Nan Zuo
Turn, the western total train number of left-hand rotation entrance driveway is respectively：Mi st =Mi-1 st+xst+ zst, Ni st =Ni-1 st+yst, Mi nt = Mi-1 nt +xnt+
znt, Ni nt = Ni-1 nt +ynt, Mi sl = Mi-1 sl +xsl+zsl, Ni sl = Ni-1 sl +ysl, Mi wl = Mi-1 wl +xwl+zwl, Ni wl
= Ni-1 wl +ywl。
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