DE1566851A1 - Traffic regulator with improved waiting time gap reduction circuit - Google Patents

Description

Dipl. Ed. F. Weickmann. Dr. Ic ₃ . A. Woickm 'Dipl. Ing.lUV & ieJciiann, Di .- !. Piys.Dr.K.Fi- Oipl. Ing. FA Welckmann, Dip !. Cijem. B. Hi - ~ 8 Munich 27, Möhlstr. 22nd

E.W. Bliss Company, 217 Second Street,

Canton, Ohio, USA _c

Traffic controller with improved latency gap reduction circuit.

Priority: United States of America, patent application dated October 12, 1966, Serial No. 586.127

This invention relates to traffic control technology and, more particularly, to a traffic controller having an improved one Waiting time gap reduction circuit.

This invention is particularly applicable in connection with a fully automatic traffic controller for two or more traffic directions and will be described with reference to such, although this invention can be used with different types of traffic regulators, including, for example, a semi-automatic traffic regulator for two directions of traffic.

009818/0816

Traffic regulators with latency gap reduction circuitry are known in traffic control technology. One goal of such a circuit is to change the free-travel signals to the two intersecting traffic routes as a function of the time during which a means of transport waits on the traffic route, deir

the free travel is withheld (this time is life as a waiting time ο termed period), and this ^ as a function of the actual time gap between two consecutive vehicles on the route to which the free travel signal is assigned determine. When the actual time gap exceeds a certain or reference time gap or after a certain waiting period has elapsed, a change in the allocation of free travel is generally initiated. Precautions can be taken will be for a last-vehicle transit time by the last Allow vehicle that is on the traffic route that has free travel to reach the intersection before this traffic route Free travel is withheld.

Various implementations of such latency gap reduction circuits are in the U.S. Patents 3,234,505, 3,241,108 and 3,241,109. The patent given to the present The closest patent application is likely to be U.S. U.S. Patent 3,241,109. This patent describes an actual gap time measuring circuit, which is reset by every vehicle detection that is made in

the

the associated traffic route occurs, so as to> / associated actual time gap between two consecutive! Vehicles on this

003818/0016

To measure the traffic route, a waiting time circuit to measure the Period during which a vehicle is on the traffic route that the Free-travel signal is withheld, waits to obtain free-travel, and a comparison circuit to determine the potentials to compare the actual time intervals and the waiting time period and then a change in the allocation of the free travel signal to be carried out when the two potentials have approximately the same value.

The actual gap time circle used in U.S. Patent 3,241,109 has a capacitor that is charged in an approximately linear manner, so that the actual gap time corresponds to the Timepiece is measured by the value of the charged voltage which increases with the passage of time. However, the waiting time circuit described has an RC circuit in which the waiting time period represented by the value of the charged voltage on an exponentially charged timer capacitor will. Accordingly, this U.S. Patent at most a comparison between an approximately linear function (actual gap time) with an exponential function (waiting time). Consequently, the timing may where the potential, the actual gap time and the potential « that represents the waiting time have essentially the same value, not exactly from one cycle to the other during the Operation of the traffic regulator can be predicted.

The present invention is concerned with a traffic regulator that includes an improved W-r'.e time gap reduction circuit

000013/0016

has in which the actual gap time and waiting time through linear functions can be represented, whereby the point in time at which the two functions are essentially the same can be precisely predicted, thereby the aforesaid disadvantages as well as others of previous traffic regulators with latency gap reduction circuits to be overcome.

The present invention is concerned with a traffic regulator for controlling the allocation of stop and travel signals to at least two intersecting traffic routes, devices for detecting Vehicles in at least one of the mentioned traffic routes during the time during which a stop signal is sent to the other traffic route is given, and a waiting time gap reduction circuit for initiating the change in the allocation of the drive and stop signals to the traffic routes as a function of the waiting time on the other traffic route and the gap time between two consecutive ones Vehicles on the first traffic route.

According to the present invention, this includes an improved waiting time. Thickness reduction circuit with a transit time timer means for generating a first signal which progressively varies in a linear manner with elapsed time between two successive vehicle determinations changes, and a delay time timer with a device for generating a Second signal, which is linear with the previous signal Time changes during the period in which a vehicle is on the road

009818/0816

BATH ORIGINAL "

1566351

kehrsweg waits, to which a stop signal is assigned, and a device for comparing a first and second signal, as well as generating a trip completion signal when the first and the second signal are related to each other in a certain way.

According to a more limited aspect of this invention, the Drive-through time timer and the waiting time timer each have a first and a second signal as voltage potentials, which are in change linearly with elapsed time.

Furthermore, the transit time timer and the waiting time timer generate the actual delay time signal and the waiting time signal as voltage potentials that approach a common value in a linear manner with the passage of time, so that after a given time period the potentials have approximately the same value.

The point of the present invention is an improved one "Provide v / arte-time gap reduction circuit, wherein" the actual gap time and the waiting time are represented by linear functions, so that the point in time at which the two Functions achieve a certain relationship to one another, precisely from one cycle to another during the operation of the controller can be predicted. This improved latency skip reduction circuit is relatively easy to assemble and economical to manufacture. The solid-state switching elements used reduce energy consumption. The built-in linear

009618/0616

BATH ORIGINAL

Timers generate output potentials that vary in a linear manner change with the passage of time. These are less susceptible to transient processes and are therefore more repetitive in operation than previous waiting time gap reduction circuits with RC time. knives. The timer circuitry does not charge a capacitor in an exponential manner, and accordingly they do not require large timing capacitors with those resulting therefrom Difficulty achieving temperature equalization without expensive switching elements.

An embodiment of the invention is based on the following Description and the accompanying drawings.

Figure 1 is a schematic representation of a typical intersection to which the present invention is applied can be i

Figure 2 is a schematic circuit diagram of a preferred embodiment of the invention

FIG. 3 is a block diagram of a traffic regulator in FIG

built into the preferred embodiment of the invention is;

Figure 4 is a diagram of the traffic period accordingly represents the positions of a step switch »and the

Figures 5, 6, 7 and 8 are diagrams of the various Illustrate aspects of the operation of the invention.

BATH

TRAFFIC REGULATOR

We now refer to FIGS. 1, 3 and 4, which have the purpose of illustrating a preferred embodiment of the invention, and which are not intended to limit it, and in which FIG. 1 shows a typical intersection with two traffic routes, traffic route A and traffic route B, .represents. In addition to the intersection of the two traffic routes , stop lines SL are indicated schematically, which can be attached as requested by the urban traffic engineers. A sensor is arranged in each entrance to the intersection, ie the sensors Dl and D2 for the entrances to the traffic route "A and the sensors D3 and D4 for the entrances to the traffic route B. The sensors Dl, D2, D3 and D4 preferably have the shape of Loop sensors, which are well known in the traffic control art and which generally have a closed conductor loop installed under the traffic route, the loop representing the area monitored by the sensor The sensors provide an output signal as long as a vehicle is over the monitored area. The sensors Dl and D2, D3 and D4 can also take the form of other sensors, such as ultrasonic sensors, which are used in a more similar way to the loop sensors to cover a certain area of the area Control or monitor the road for existing vehicles and generate an output signal as long as a vehicle is on the surface that is being monitored. Furthermore, the sensors can also have the form of spot sensors, such as

009818/0816
BATH ORIGINAL '

the well-known step sensors, which, together with their associated circuits, generate an output signal as a function of each actuation by a vehicle driving over the stain sensor. When the sensors are in the form of loop sensors, as shown in FIG. 1, each sensor should preferably be, as in FIG Figure 1 is shown with reference to the probe D3, a width Vi, which is large enough to include all vehicles on all lanes in the approach to the intersection, a length L, which is in Direction of the traffic route extends over a distance that is smaller is of the order of magnitude than the length of a vehicle, for example of 1.22 m, and it should be at a distance D from the stop line of the order of 61 m can. The sensors Dl, D2, D3 and D4 are connected to the local controller LC, which controls the operation of an intersection traffic signal S. controls, which gives travel, caution and stop signals to the two traffic routes A and B. Preferably in connection with the present invention are the loop sensors Dl and D2 to the control unit A for controlling the signal passing through the traffic light S to the traffic route A and the sensors D3 and D4 to the control unit B for controlling the signal transmitted by the traffic light S granted to traffic route B.

The traffic controller, which is described below, has the form of a fully automatic traffic controller for two traffic routes a control unit for each traffic route. The invention is not

Ö09818 / Ö816

BATH

1556851

limited to such a traffic regulator / but can be used with other traffic regulators, e.g. semi-automatic traffic regulators for two traffic routes or for fully automatic traffic controllers for two or more traffic routes in which the entire control circuits are combined in a single unit, in contrast for the control units which are described with reference to FIG. 3, are used.

As shown in FIG. 1, the local traffic regulator LC has two control units A and B for controlling the flow of traffic in the traffic routes A and B. The control units A and B are essentially identical, and accordingly only the control unit A is described in detail below, since this description can be applied precisely to control unit B.

We now refer to FIG. 3. The control unit A comprises five timers: a normal timer T1, a variable / l start time timer T2, a transit time timer T3, an extension limit interval and Green No. 2 timer T4, and a waiting time minimum idle time timer T5, and a step switch SS for controlling the operation of the signal lamps of the Traffic lights S for the traffic route A via the relay LR depending on the actuation of the loop sensors Dl, D2 des Verkehrsweges A. This step switch SS has eight contact groups and eleven switch positions.

As will become apparent from the following description, the control unit A has various timer circuits

ÖQ9Ö18 / ÖÖ16

BATH ORIGINAL. ¹ -

NOR circuits, AND circuits, OR circuits and AND (AC voltage) circuits. To facilitate understanding of this invention, each of these circuits will be described will be briefly explained.

TIMER CIRCUIT. This is a solid state static circuit with an input and an output circuit. After applying the ground potential, known as the ^w O ^w signal, the timer begins its time-measuring function and when it is finished it generates a positive potential on its output circuit,
known as the "I" signal.

NOR circuit. This is a solid state static circuit with one or more input circuits and one
Output circle. An "O" signal appears at its output if an ^M l "signal is applied to any input circuit. If an" O "signal is applied to all input circuits, appears on
Output circuit on "!" Signal.

AND CIRCUIT. This is a solid state static DC circuit with two or more input circuits and one
Output circle. A "1" signal appears on its output circuit as long as all input circuits receive a "1" signal. When a
"O ^H signal is applied to any of its input circuits, an" O ^ signal appears at the output circuit.

OR CIRCUIT. This is a solid state static circuit with two or more input circuits and one output circuit.

0OÖÖ18 / 0016

BATH ORIGINAL

An ^H 1 ^H signal appears at its output circuit as long as any input circuit ^{receives an M} 1 "signal.

AND (AC VOLTAGE) CIRCUIT. This is a solid-state static circuit, such as a transformer, with two input circuits and an output circuit for generating an AC output signal at its output circuit, if only one of its input circuits is connected to ground and the other of its input circuits is connected to the hot side of an alternating voltage source.

STEP SWITCH.

The step switch SS is preferably in the form of a switch with eight switch groups and eleven switch positions. As you wish the step switch can take the form of an electronic ring switch that cycles through eleven switch positions can be. As is known to anyone skilled in the art, the step switch SS cyclically passes through eleven positions during which Various circuits can be closed with the help of relay LR in order to feed the lights of the traffic light S. Different Relay combinations can be made according to the plan of the traffic engineer * From Figure 4 it can be seen that the switch positions 1, 2, 3, 4, 5, 6, 7, 8, 9, IO and 11 each Special evacuation interval No. 2, the minimum and initial density interval, the GrCtn dwell interval, the transit time interval and the card time minimum lull interval, the vehicle eviction interval No. 1, the special evacuation interval No. 2, the green

009818/0816
BAD LOCAL

- 12 - 1565851

Interval No. 2 and the green dwell interval, the vehicle evacuation interval No. 2, the red dwell interval No. 1 and the red dwell interval Represent No. 1.

As can be seen from the following description, the control unit shown in FIG. 3 can be a controller for controlling a single traffic silver-monitored path (version 2) or it can be used as a semi-automatic traffic controller for two traffic routes to control the main road according to a given scheme and the cross-road traffic flow depending on the volume of traffic can be used (version 1). The control unit can be converted into a semi-automatic traffic regulator by open the normally closed switches SW-I, SW-2, SW-3,

and
SW-4 / SW-S ^ / by closing the normally open switches SW-6 and SW-7. For semi-automatic operation (version 1, Figure 4) the step switch intervals 10, 11 and 1 to 6 are the red (stop) period of the main road and the interval 9 is the yellow (caution) period of the main road. Step switch positions 6 to 11 and 1 can also be the red period of the cross street, positions 2 to 4 the green period of the cross street and position 5 the yellow period of the cross street. With the switches SW-I to SW-7 in the position shown in Figure 3, the circuit is used as a fully automatic control unit (version 2, see Figure 4) for a single traffic route, in which the step switch positions 10, 11 and 1 as the monitored red - (Stop) period of the traffic-monitored route, switch positions 2 to 8 as green

009818/0816

ORIGINAL BATHROOM

(Drive) Period of the traffic-monitored route and position 9 serve as the yellow (caution) period of the traffic-monitored path.

NORMAL TIMER.

The normal timer Tl as well as the timer T2, T3 _f T4 and T5 normally has a linear sawtooth generator 30 and a differential amplifier serving as the comparison circuit 32nd The generator 30 and the comparison circuit 32 are preferably designed as described in the German patent application No. B 94 003 IXb / 83b of the same applicant. The generator 30 has a direct current amplifier 34 and a negative feedback capacitor 36. In short, after applying an "O" signal to the input circuit of the generator 30, an output voltage V appears at the output circuit, which increases linearly with the elapsed time, as shown in the diagram next to the generator 30 in Figure 3 shows. The comparison circuit 32 is used to compare the value of the linearly increasing output voltage V with the reference voltage V

O Λ

compare and produce a positive DC output signal known as a "1" signal when the value of the two Potentials are essentially the same.

The reference voltage V applied to an input circuit of the comparative

Circuit 32 is applied, comes from one of the five potentiometers 38, 40, 42, 44 and 46. Each of these potentiometers is between ground and the B + pole of the voltage source via the contacts of the step switch SS. Accordingly, it can be seen that the time

009018/0816

delay that is necessary is the output voltage V of the generator 30 to bring it closer to the value of the reference voltage V from the setting

Xf

of the potentiometer, which is connected to the Input is placed, depends.

As discussed above, the various potentiometers 38, 40, 42, 44 and 46 are connected to the voltage source B + via the step switch contacts. As is known to anyone skilled in the art, it switches Step switch every time it is connected to voltage one step further to close a switch in each switch group until the step switch is switched to the next position. So, e.g. in the step switch position 6, all are normally open switch in the eight switch groups closed. We are now referring to the potentiometer 38, which is between ground and the voltage source B + via the normally open step switch contact, which is in switch group 6, position 1, and which is designated in the drawings as SS6-1. Exactly, that's how it is Potentiometer 40 to the voltage source B + via the step switch contact of group 6, position 2, SS6-2 switched on. Furthermore, the potentiometers 42, 44 and 46 are located over the step switch contacts SS6-5, SS6-6 and SS6-9 at the voltage source B +. It is noted that these step switch contacts are in different positions of the step switch are closed, never two being closed at the same time. Hence the potentiometer serves 38 to determine the duration of the special summation interval No. 2. The potentiometer 40 is used for the duration of the minimuittan

009Ö10 / Ö01Ö

BAD ORIGINAL / Ά0 :

To determine catch-Intervals, the potentiometer 42 to determine the duration of the vehicle summation interval no. 1, the potentiometer 44 for determining the duration of the special summation interval No. 1 and the potentiometer 46 for determining the special summation interval No. 2. These step switch positions and the traffic intervals are shown in the diagram of FIG. ,

The input circuit of the S-tooth generator 30 is connected to the voltage divider 48 at the voltage source B +, and also above the normally open break contact S.S.INT.A on the same Voltage source B +. The breaker contacts A are attached to the step switch and are momentarily closed every time the step switch is switched from one position to the other. sen. Each time the step switch is operated, a "!" signal, i.e. the voltage B + at the input circuit of the generator 30 switched on to reset the generator so that its output voltage V is brought to ground potential before the time measurement begins.

The input circuit of the standard timer Tl, i.e. the input circuit of the generator 30, is at the output circuit of a NOR circuit 50, whose The input circuit in turn is connected to an AC voltage source L4 via a rectifier 52. The AC voltage source is L4 preferably the hot side of an alternating voltage source, the other side of which is connected to ground. The ground side of the AC voltage source is used in the following description either as Ground or Ll voltage source. The rectifier 52 the AC voltage source is used for this purpose in a positive potential,

00ÖS18 / Ö818
BADORIGfNAL

convert, known as a "1" signal for application to the NOR circuit 50 / so that as long as there is no interruption in the voltage source L4, a "1" signal is applied to the input circuit of the NOR circuit 50 is, whereupon an "O" signal from the output circuit of the NOR circuit 50 is placed on the input circuit of the timer Tl. The output circuit of the timer T1, i.e. the output circuit of the comparison circuit 32, is connected to the input circuit of an OR circuit 54, the output circuit of which is connected to the input circuit of a AND circuit 56 is connected. The output circuit of the AND circuit 56 is connected to an input circuit of the OR circuit 58, the output circuit of which is connected to the input circuit of a further AND circuit 60 is connected. The output circuit of the AND circuit is connected to ground via the relay coil CR4-C of the control relay CR4.

CHANGEABLE STARTING TIME TIMER.

The variable start time timer T2 is the normal timer Tl are essentially similar and therefore the same components provided with the same reference numbers in FIG. 3. The variable voltage V_ for the comparison circuit 32 of the

Timers T2 comes from a voltage divider 62 between Ground and the voltage source B +. The output circuit of the timer, i.e. the output circuit of the comparison circuit 32, is connected to an input circuit of the AND circuit 56. The input circuit of the timer T2 is via a starter circuit 64 and the normally open step switch contacts SS6-2 of the step switch group 6, position 2, with the voltage source B +

009818/6616

BATH ORIGINAL

tied together. The circuit of the timer T2 is also on Output circuit of an NOH circuit 66, whose input circuit in turn is connected to the output circuit of a rectifier 52. The changeable start timer serves a changeable one Time period depending on the number of actuations of the vehicle sensors Dl and D2 of the traffic route A to measure and this Function is with the help of a time adding circuit 68, dar to the Output of the amplifier 34 is switched on, reached. The time adding circuit is adjusted with the help of potentiometer 69, and its input circuit is directly above the normally open Relay contacts CRl-2 of the relay CRl and the normally opened step switch contacts SS6-1, 10, 11 at the voltage source B +, so that in switch positions 1, 10 and 11 each time, when the contacts CRl-2 are closed, the B-h potential to the Time adding circuit is applied. Preferably, the variable start time timer is set so that a time increment between 1 to 5 seconds is generated for each vehicle actuation.

TRANSIT TIME TIMER.

The transit time timer T3 is essentially with the Standard timers T1 are identical and therefore the same components are provided with the same reference numbers in FIG. 3. The transit time timer used to measure a transit time when pressed, otherwise known as a unit of extension time, what the time is; that a vehicle needs to

009818/0818

/ Wk

-ie- 1556851

Distance from the vehicle sensors Dl, D2 of the traffic route A up to the stop line SL at the intersection (see Figure 1). This time is usually on the order of 0 to 30 Seconds according to the plan of the traffic engineer, the reference voltage V for the comparison circuit 32 of the timer T3 comes from an adjustable drive-through time potentiometer 71. The output circuit of the timer, i.e. the output circuit of the comparison circuit 32, is connected to the input circuit of an AND circuit 70, whose second input circuit above the normally open step switch contact SS6-4 is connected to the voltage source B +. The output circuit of the AND circuit 7C is connected to the input circuit of the OR circuit 54. The input circuit of the timer T3, i.e. the input circuit of the sawtooth generator 30, is connected to the output circuit of a OR circuit 72. The input circuit of the OR circuit 72 has an input which is connected to the output circuit of a NOR circuit 74, whose input circuit is in turn connected to the output circuit of the rectifier 52. A second input circuit of the OR circuit 72 is connected to the output circuit of a NOR circuit 76, the input circuit of which in turn has a rectifier 78 with the aid the normally open step switch contacts SSl-2, 3, 4 at the voltage source L4. A third input circuit of the DDER circuit 72 is via the normally open relay / contacts CRl-3 of relay CRl through the normally closed Relay contacts CR3-2 of relay CR3 at voltage source B +.

0OÖ818 / ÖÖ16

BATH

EXTENSION LIMIT INTERVAL AND GREEN INTERVAL No.2 TIMER.

The Extension Limit Interval-and-Green-Interval # 2 Timepiece T4 is essentially identical to the normal timer T1 and therefore the same components in FIG. 3 are identical Provided with reference numbers. The reference voltage V for the comparison

The circuit 32 of the timer T4 is obtained in the step switch positions 2, 3 and 4 from the voltage source B + via the potentiometer 80 and the normally open step switch contacts SS6-2, 3, 4. In the step switch position 7, the reference voltage V is obtained from the voltage source B + via the potentiometer 82 and the normally open step switch contact ss6-7. The potentiometer 80 is used for the maximum duration of the extension limit interval and the potentiometer 82 is used for the duration of the green interval no. 2 (Figure 4) to be determined.

The input of the timer T4, i.e. the input of the linear SS gear generator 30, is at the output circuit of a NOR circuit 84, whose input circuit is connected to the output of an AND circuit 06 is. An input circuit to AND circuit 86 is above that normally Opened step switch contacts SS6-7 at the voltage source B +. The other input circuit of AND circuit 86 is UBer a rectifier 88 at the line voltage source L4.

The input of the timer T4 is also at the output circle of one NOR circuit 90, whose input circuit is connected to the output circuit of a rectifier 92 lies. The input circuit of the rectifier 92 is in turn connected to the output circuit of an AND (alternating current) circuit

009618/6616

BADOfllGlNAt

_ 20 -

turned on. The AND circuit 94 can be in the form of a transformer, the secondary winding of which is connected to the rectifier 92 and the primary winding of which is used as an input circuit, the transformer having one end of the primary winding connected to the AC voltage source L4 and the other end of the primary winding via the step switch contacts SS5-2 , 3, 4 a normally closed switch SI7-3 and, in the control unit B, if via the normally open relay contacts CR2-3 (which correspond to the contacts with the same designation in the control unit A), and via the 'step switch contacts SS7-10, 11 des Step switch of the control unit B is connected to ground. This part of the circuit of the control unit B is shown in FIG. 3 only for easier understanding of the type of connection of the control units A and B.

The output circuit of the timer T4, i.e. the output circuit of the comparison circuit 32, is connected to an input of an AND circuit 96 switched, the other input circuit over the normally open step switch contact SS6-7 is connected to voltage source B +. The output circle of the AND circuit 96 is on Input circuit of the OR circuit 58. The output circuit of the timer T4 is also connected to the input circuit of another AND circuit 98 connected, the second input circuit or the normally open step switch contacts SS6-2, 3, 4 is connected to the voltage source B +. The output circuit of AND circuit 98 is present an input of an OR circuit 100. The output circuit of the OR circuit 100 is above relay coil CR3-C of relay CR3 in bulk.

009818/0816

BATH ORIGINAL

WAITING MINIMUM FLOOD TIME TIMER.

The waiting time-minimum idle time timer T5 is essentially identical to the normal timer Tl and therefore are the same Components in both circuits in FIG. 3 have been given the same reference numbers. One major difference between the The timer T5 and the normal timer T1 consists in that the generator 30 * of the timer T5 is a supplement to the generator 3C is in the timer Tl. That is, as determined by comparing the waveform assigned to the circuits of the timers T1 and T5 can be, the value of the output voltage V of the timer Tl grows linearly in a positive direction with the elapsed Time on, while the value of the output voltage V of the timer T5 decreases linearly with the elapsed time towards ground potential. The reference voltage V_ of the comparison circuit 32 of the

R.

The timer T5 comes from the output circuit of the generator 30 of the timer T3, so that the reference voltage V has the same value as the output voltage V of the generator 30 in the timer · T3. Accordingly, the timer T5 is used to compare the linearly decreasing voltage V of the generator 30 * with the linearly increasing reference voltage ν _π from the generator 30 of the timer T3.

The input circuit of the timer T5, i.e. the input circuit of the Generator 30 'is via an adjustable waiting time potentiometer 102 led to the connection of a voltage divider Io4. Of the Voltage divider 104 lies between the wiper of the potentiometer 71 of the timer T3 and the wiper of an adjustable minimum sleep potentiometer 106, in turn between mass and the

009818/0816
BAD OBIGJNAL

Voltage source B + is present. 33 << ■

The input circuit of the timer T5 is also connected to the output circuit of a NOR circuit I08, whose input circuit is connected to the output circuit a rectifier 112 is connected. The rectifier 112 is connected to the output circuit of an AND (alternating voltage) Connected to the Ho district. One of the input circuits of the AND (AC voltage) Circuit 110 is connected to voltage source L4 and its other input circuit via the normally closed step switch contacts SS8-4, the normally closed switch SW-3, and, in the control unit for traffic direction B, over the normally open relay contacts CR2-3 and then via the step switch contacts SS7-10, 11 to ground.

RELAY CIRCUITS.

The previous description of the timers T1, T2, T3, T4, and T5 called connection circuits with the relays CR1, CR2 and CR3. The relay CRl can be called a vehicle sensor relay and has a relay coil CRl-C, which is connected between a twelve-volt AC voltage source, as 12V-A.C. in Figure 3, and ground is connected via the sensors Dl, D2 of the traffic route A, these im Circuit are shown as normally open switches. The relay CRl has normally open relay contacts CRl-I, CRl-2 and CRl-3. These contacts are in the previous description has been described with reference to their connection to the timer circuitry. In addition to the previous ones Connections can be seen from Figure 3 that the con-

009818 / U81Ö

BATH ORIGINAL

clocks CRl via the relay sink CR2-C of the storage relay to ground lie. The relay CR2-C has normally open contacts CR2-2 and CR2-3. The relay CR3 with the coil CR3-C, which is between the output circuit of the GDER circuit 100 and ground is switched, has normally open relay contacts CR3-1 and normally closed relay contacts CR3-2. Furthermore, the relay circuits are also equipped with a selector switch SW-lO, which is a pair with each other movable contacts 116 and 118 has / connected. The movable contacts 116 and 118 can be in one of four positions be brought, namely Maximum, Recall, Aus and Outer memory. In the off position, the HG contact is used together with the relay contacts CR2-2 to provide a shunt to the normally open FCthlerrelaisontakt GRl-I. Consequently will every time the relay coil CRl-C is connected to voltage to energize the relay coil CR2-C (in switch positions 1 and 5 to 11), the relay contact CR2-2 closes a shunt to the contacts CRl-I to provide the relay coil CR2-C to stick to Spanming. If the switch SVi-lC is in its recall position the contact 116 places the relay coil CR2-C between ground and the AC voltage source L4 {in the step switch positions 1 and 5 to 11) around the storage reel in a permanent recall state to keep. When the SK-IC switch is in the maximum position the contact 118 puts the FCthlerrelisspule CRl-C between 2-iasse and the twelve-volt AC voltage source, so the sensor relay coil to be constantly aroused. When the switch SW-IG is in its outer storage stables is, we the spear function through sweetness

009 * 18/0816

BATH ORIGINAL

Storage means executed, such as a presence sensor, the as previously described, as long as an output signal is generated as long as a vehicle is in its observation zone. In addition to the previous one it is noted that the relay contacts CR3-1, when closed, serve to shunt the To generate voltage source L4 and the relay contacts CRl-I. as well the memory relay contacts CR2-3 are used when they are closed during switch positions 10 and 11 / to receive a vehicle call signal, this indicates that a vehicle on traffic route A wishes to drive freely through the intersection, to the safety unit for traffic route B via the normally closed switch SW-3 to give.

STEP SWITCH EXCITATION CIRCUIT,

The step switch excitation circuit has the relay coil CR4-C of the relay CR4 in the output circuit of the AND circuit 60. The Relay CR4 has a set of normally open contacts CR4-1 which are used to connect the CR5-C stepper coil the AC voltage source L4 and ground via the diode 120 to place. The step switch SS is advanced by one step in a known manner each time a voltage is applied to the coil CR5-C. The switch is switched from position 3 to position 4 when a circuit for the coil CR5-C from the AC voltage source L4 via the normally closed Breaker contacts CR5-INT-C, the off normal contact 122, the normally open step switch contacts SS8-3, the normally closed switch SW-3, the normally open

009818/0816

BAD ORIGINAL ^r

Relay contacts CR2-3 (in the control unit B) and the normally open step switch contacts SS7-1O, 11 of the traffic direction B is closed to the ground. The off normal contact 122 is controlled by the step switch and is normally open, with the exception of position 3. The normally closed breaker contacts CR5-INT-C are controlled by the coil CR5-C and are open as long as the coil is energized.

The input circuit of the AND circuit 60 is connected to the output circuit of the NOR circuit 124. An input circuit of the NOR circuit 124 is connected to the voltage source Ll (ground), with the exception

SS during positions 3 and 8. The step switch ^ is from the Position 3 is switched to position 4 by the circuit above with reference to the off normal contact 122 and the breaker contacts CR5-INT-C has been described.

The following description relates to the circuit that is used to move the step switch SS from position 8 to position 9. This current path runs from the input circuit of another NOR circuit 125, the output circuit of which is connected to the relay coil CR4-C via the normally closed switch SW-5, via the normally open step switch contacts SS5-8 and then via the normally closed switch SW-3 and , in the control unit of the traffic route B, via the normally open relay contacts CR2-3 and the step switch 'contacts SS7-10, 11 to the voltage source Ll, ie ground. _Demge-: MSSs can not step out of its switch positions 3 and 8

000013/0010

BATH

I w w w

brought out to the relay contacts CR2-3 in the control unit to be closed for traffic route B, which indicates that a vehicle wishes to have free travel on route B. A second input circuit for the NOR circuit 124 is above the normal open switch SW-6 (which is closed in semi-automatic mode) to the connection between the normally closed switch SW-4 and the relay contacts CR2-3.

In the local traffic controller LC, which the control units A and B for controls the traffic flow on the traffic routes A and B, the control unit lingers in the phase that sends a stop signal is issued, usually in the red dwell interval No. .1, that is in the step switch position 10 (see Figure 4). When the control unit of the traffic route to which a travel signal is assigned the position 8 changes to the position 9, then it is desirable that the other control unit from the position 10 to the Position 11 is switched. Likewise, when the control unit is moved from position 9 to position 10, the other one Control unit moved from red dwell interval no. 2 in position 11 to position 1. The circuit used to run this Function is described below. The normally closed switch SW-I leads from the connection point of the coil CR5-C and the relay contact CR4-1 to the normally open step switch contacts SS4-8 of the corridor A and then to the step switch contacts S34-10 of the traffic route B. The same is the switch SW-I via the step switch contacts SS4-9, 11 to the step. Switch contacts SS4-9, 11 of traffic route B connected. The switch SW-2 serves as the connection point of the switch SW-I

above
and the coil CR5-C ^ the step switch contacts SS4-10 with the.

ORIGINAL INSPECTED COPY

To connect step switch contacts SS4-8 of traffic route B. The switch SW-2 is also above the step switch contacts SS4-9, 11 of the traffic route A with the step switch contacts SS4-9, 11 of the traffic route B connected. The operation of these circuits will described in detail below.

OPERATION

• *

Traffic route A, switch position 10.

An operating cycle for the control unit A of the local traffic regulator LC begins, for example when the control unit A is in its red dwell interval no. 1, ie in position 10. When the step switch of the traffic route B from its - position 8 is brought into position 9, the voltage source Ll of the. Control unit B via the now closed step switch contacts SS4-8, the now closed step switch contacts SS4-10 of the traffic route A and then via the switch SW-2 to the step switch coil CR5-C of the traffic route A, in order to complete an exciter current circuit. This will make the step switch SS. The control unit A is moved from position 10 to position 11, which is the red dwell interval no. At the same time, the step switch of the traffic route B is moved from its position 8 to its position 9 ^X; as can be seen from the following description with reference to the control unit A.

Traffic route A, switch position 11.

After the control unit B has your vehicle summation interval no.2,

000818/0616

COPY
ORIGINAL INSPECTED

_ 28 -

d.k. has measured the position 9, the voltage source Ll is the Control unit B via the step switch contact that is now closed SS4-9, the now closed step switch contacts SS4-11 of the

and

Control unit A ^ / through switch SW-2 to the step switch coil CR5-C of route A placed to create a circuit for Achieve excitation of this coil CR5-C. Consequently, we the step switch SS of the traffic route A from its position 11 in the Position 1 brought to the special evacuation (stop) interval No. 2 of the Traffic route A. As can be seen from the following description, the control unit B is also from its Slung 9 in the position 10, the red dwell interval no. 1, switched on, in which position the control unit B will remain until it is influenced by the traffic. The control unit A takes over now the controller.

Traffic route A, position 1.

In position 1, the normal timer T1 of the traffic route A measures a fixed special summation interval no. 2, shown as a red or stop interval in FIG is set using the potentiometer 38, is determined. When the step switch was brought into position 1, the step switch interrupter contacts SS-INT-AC were momentarily closed in order to apply the potential B +, ie an ^M l ⁿ signal, to the input circuit of the timer T1. This resets the timer so that when the switch is opened an "O" signal is applied to the timer. If the voltage

009818/0816

BAD ORIGINAL "

source L4 fails, a "1" signal from the NOR circuit 50 is applied to the input circuit of the timer T1 in order to permanently reset it. If such a power failure is absent, the timer T1 will begin to perform its timing function as soon as the step switch comes to its position 1. Accordingly, the output voltage V of the generator 30 in the timer Tl rises linearly until the value of the voltage V is essentially _{equal to the value of the reference voltage V n} , whereupon a "1" signal from the output circuit of the comparison circuit 32 to the input circuit of the OR circuit 54 is given. The OR circuit gives an ^II l "signal to the input circuit of the AND circuit 56. The AND circuit 56, however, requires a second" 1 "signal from the output circuit of the comparison circuit 32 of the timer T2, before a" 1 "- Signal is applied to the OR circuit 58. As the curve shape next to the associated generator 30 of the timer T2 indicates, the output voltage V ₀ is set so that it is above ground potential, - ie close to the potential B + is reset, an output signal, ie an "!" the output circuit of the AND circuit 60. The AND circuit 60 in turn receives a second "1" signal from the output circuit of the NOR circuit 124 with the exception of during positions 3 and 8. Consequently, a "1" signal from the output circuit of the AND -Circuit 60 is applied to the control relay coil CR4-C to this to excite. This closes relay contacts CR4-1 and creates a circuit for excitation

009318/0816

BATH ORIGINAL

the step switch coil CR5-C closed. The step switch SS moves from position 1 to position 2, the minimum and density start interval.

Traffic route A, switch position 2.

As shown in FIG. 4, position 2 is a travel or green signal interval for traffic in traffic route A. At the beginning of this interval, circuits are closed around the standard timer Tl, the extension limit interval timer T4, the Variable fc start timer T2, the transit time timer T3, and the relay coil CR3-C to apply voltage. The operation of these individual circuits is described below.

After advancing into the minimum start interval, the timer Tl is reset by the step switch interrupter contacts SS-INT-A and the timer begins its time-measuring function. The reference voltage V is provided by the potentiometer 40 during position 2, as the normally open step switch contacts SS6-2 are now closed. When the output voltage V _{n of} the generator 30 is substantially equal to the reference voltage V _n , a "1 ^H" signal is applied to R through the OR circuit 54

given the input circuit of the AND circuit 56. The AND circle 56

58, however, no sets "!" - signal to the OR circuit ^ until a "l ^ll signal> with the output circuit of the Veränderlichejft start time of timer T2 is generated in the position 2 which belongs to the timer T2 starter circuit 64 is operated. to make the timer T2 start the timing function

009Ö10 / 001 β

BATH ORIGINAL

of the voltage V _Q is adjusted by the time adding circuit 68 so that it changes the time required for the output voltage V to become substantially equal to the reference voltage V_. Ever

R.

the greater the minimum value of the voltage V, the shorter the time is necessary to achieve an output "1" signal from the timer T2 and the smaller the minimum value of the voltage V_, the greater

O I

is the time necessary for the timer T2 to generate an output "!" signal. The time adding circuit 68 receives a B + signal during positions 1, 10 and 11 each time the vehicle sensor relay contacts CR1-2 are closed. Accordingly, the variable starting time is increased proportionally with the number of vehicles that were used during the previous period in which a stop signal was issued on the traffic route A. The variable start time timer is adjusted by means of a potentiometer 69 to provide approximately five seconds for each vehicle detection. When the timer T2 ends its time-measuring function, it applies a *! "Signal to the input circuit of the AND circuit 56, whereupon the AND circuit applies an input signal via the OR circuit 58 to the input circuit of the AND circuit 60 A "1 ^M" signal is applied from the output circuit of NOR circuit 124 to AND circuit 60, except during positions 3 and 8, a "!" signal is generated to energize control relay coil CR4-C, whereby a circuit for energizing the stepping switch coil CR5-C is closed. As a result, the step switch SS is brought from its position 2 to position 3, the Grön dwell interval.

At the beginning of position 2, there is also a circuit for excitation of the transit time timer T3 is closed. More precisely, in the

009818/0816

PADORLGiNAL '

In positions 2, 3 and 4, a circuit is closed from the AC voltage source L4 via the step switch contacts SSl-2, 3, 4 and then via the rectifier 78 in order to generate a "1" signal for application to the NOR circuit 76. Correspondingly, the NOR circuit 76 applies an "O" signal via the OR circuit 72 to the input circuit of the timer T3. As long as there is no failure of the voltage source L4, an ^M O "signal is applied by the NOR circuit 74 via the OR circuit 72 to the input circuit of the timer T3 To measure transit time, as it is set with the aid of the potentiometer 71. The transit time timer can be reset by the vehicle actuation in traffic route A, since the relay coil CRl-C is energized for each actuation in order to close its contacts CRl-3 Closing the contacts CRl-3 applies a "1" signal from the voltage source B + via the normally closed relay contact CR3-2 to the OR circuit 72. This momentary application of a "!" Signal by the OR circuit 72 sets the timer T3 back so that it begins to measure a second passage time. When the passage time timer ends its time-measuring function, a "1" signal is generated at its output eugt and applied to the AND circuit 70. However, there is no "1 * signal from the output circuit of the AND circuit 70 to the input circuit

others

of the OR circuit 54 is applied in any position other than position 4. Accordingly, when the transit time timer ends its timing function in the interval 2 or 3, the Step switch SS not energized.

In light traffic conditions, the start time timer T2 end its timing function before the normal timer Tl

009Ö48 / 08 Ί 6
BATH

ended its timing function. In severe traffic conditions, however, the starting time timer T2 can request a longer time to end its time-measuring function after the normal timer T1 has already ended its time-measuring function. As a result, traffic route A would maintain free travel to the detriment of traffic route B. The extension limit interval part of the timer T4 is used to measure a maximum time period for free travel for traffic route A after a vehicle in traffic route B has registered its question about free travel through the intersection. More precisely, is a current fairy closed at any time in traffic direction A, switch positions 2, 3 and 4 to excite the timer T4, if a vehicle has been detected in traffic route B? Consequently, if the relay contacts CR3-2 of the traffic route B are closed, which represents a vehicle detection in the traffic route B during the positions 10 or 11, the voltage source Ll is through the step switch contacts SS7-10, 11 of the traffic route B, through the now closed relay contacts CR2 -3 of the traffic route B and through the switch SW-3 of the traffic route A, the step switch contacts SS5-2, 3, 4 of the traffic route A to the AND (alternating voltage) circuit 94 placed. As long as the voltage source L4 does not fail, the AND (alternating voltage) circuit 94 applies an alternating voltage signal to the rectifier 92. The circuit 92 in turn applies a "1" signal to the input circuit of the NOR circuit 90, which in turn has a '^' signal

to the input circuit of the timer T4, so that the timer T4 can begin its time-measuring function. The duration of the extension limit interval is determined by the set value of the reference voltage V, which is set in switch positions 2, 3 and

009818/0816

BAD ORIGtNAL

4 is obtained from potentiometer 80. When the extension limit interval timer T4 ends its time-measuring function, a "1 ^M signal is switched from its output circuit to the AND circuit 98. During positions 2, 3 and 4, the AND circuit 98 sets an ^M 1 ^M - Signal via the OR circuit 100 to the coil CR3-C of the relay CR3 to energize it, thereby opening the normally closed relay contacts CR3-2 to prevent further vehicle detections from traffic route A from resetting the transit time timer T3 End the measurement of a drive-through time by means of the travel time timer and ^{generate a "1 H} signal in order to pass this on to the AND circuit 70. If this happens during switch positions 2 or 3, then as soon as the step switch is moved to position 4, a "1" signal is switched by AND circuit 70 via OR circuit 54 to URD circuit 56.

Traffic route A, switch position 3.

When the step switch is moved from position 2 to position 3, control unit A is in its green dwell interval. This time interval is not measured. In order to move the step switch from position 3 to position 4, actuation must be carried out by a vehicle in traffic route B. If a driving

vehicle detection takes place in traffic route B, the relay contacts CR2-3 of the control unit B closed, and the voltage source Ll is through the step switch contacts SS7-10, 11, the now closed contacts CR2-3 and then through switch SW-3

009818/0816

BATH ORIGINAL

1565951

of the traffic route A to the step switch contacts SS8-3 the off normal contact 122, which are all closed in position 3, through the breaker contacts CR5-INT-C to the stepping switch coil CRS-C connected and so a circuit to excite the Coil CR5-C closed. The step switch moves from its position 3 to its position 4. Accordingly, when the, plunging position took place by a 'vehicle in the traffic route B during the position of the traffic route A, the Grön dwell interval of the traffic route .A substantially cut off »On the other hand, the control unit of the traffic route A remains in its GrQn dwell interval up to the time at which an actuation by a vehicle on the Traffic route B enters.

Traffic route A, switch position 4.

In position 4, the transit time and waiting time minimum idle period of the traffic route A, the step switch is brought to position 5 as soon as the transit time timer ends its time-measuring function, so that the AND circuit 70 sends a ^W 1 ^M signal via the OR circuit 54 to AND circuit 56 there. As described above, the drive-through timer will be forced to terminate its timing function when the extension limit interval timer, T4, terminates its timing function. This geshieht if the INTERVAL ^{Verl3ngerungsgrenz-2} ends eitmesser its time-determining function and produces an output signal characterized cancels the restoring property of the passing time Zeitmesaers that it excites the relay coil CR3-C and

009818/0816

BAD ORiGINAt

so the contacts CR3-2 opens. However, the waiting time minimum idle time timer T5 also serves to excite the relay coil CR3-C during step switch position 4 and thus cancel the reset property of the drive-through timer. In switch position 4, the potential L1 is transmitted from the control unit B tf via the step switch contacts SS7-1G, 11 of the traffic route B and the closed relay contacts CR2-3, which represent a vehicle detection on the traffic route B, and then via the switch SW-3 and The step switch contacts SS8-4 of the traffic route A are connected to the AND (alternating voltage) circuit 110. As long as the voltage source L4 does not fail, the AND (alternating voltage) circuit 110 applies an alternating voltage signal to the rectifier 112. The rectifier 112 connects an ^M 0 "signal to the NOR circuit 108, which in turn a"! "Signal the input circuit of the timer T5 is applied, whereby the timer begins its time-determining function. Since the sawtooth generator 30 'is complementary to the generator 30 of the standard timer. Tl, the output voltage V of the generator 30' falls linearly, as the curve form associated with the timer T5 shows The reference voltage V for the comparison circuit 32 of the timer T5

is the output voltage of the generator 30 in the drive-through timer T3. If the output voltage V of the generator 3C 'is essentially

is usually equal to the reference voltage V, the comparison circuit generates 32 of the timer T5 a "1" signal, the Cf via the OR circuit ICO energizes relay coil CR3-C. This opens the Relay contacts CR3-2 and prevents further resetting of the drive-through timer T3. Then the transit time ends

009818/0816 irf _{,, ;} , BAD ORiGiNAL

Timer T3 measures the transit time and applies a "1" signal to AND circuit 70. It should be noted that timer T5 is able to work according to the extension limit interval of timer T4 and, accordingly, the extension limit time Controls the point in time at which the corner feature of the drive-through timer is canceled. A "1" signal is applied to AND circuit 56 through OR circuit 54. Since the variable start time timer has already expired, a "!" to the AND circuit 60. Since AND circuit 60 receives a "1" signal from NOR circuit 124, with the exception of switch positions 3 and Q ₁₃ , a "1" signal is also generated from the output circuit of AND circuit 60 around control relay coil CR4-C to excite. This closes the relay contacts CR4-1 to close an excitation circuit for the step switch coil CR5-4. Accordingly, is the step? Switch SS moved from position 4 to position 5, the vehicle clearance interval No. 1 of traffic route A,

Traffic route A, switch position 5.

The vehicle clearance interval No. 1 of the traffic route A is a Travel interval for the traffic route A and is with the normal timer Tl measured. The duration of this interval depends on the value of the reference voltage V, which is applied to the comparison circuit 32 of the timer Tl is placed, which voltage in turn is set with the potentiometer 42. When the output voltage V des Generator 30 of the timer Tl essentially the same

0098 1 β / 001 β

BATH ORIGINAL,

- 38 -. 1566351

Reference voltage V, a “!” Signal is applied from the output circuit of the timer T1 via the OR circuit 54 to the input circuit of the AND circuit 56. Since a "1" signal is applied to the AND circuit 56 from the output circuit of the variable start time timer T2, a "1" signal is applied to the AND circuit 60 via the OR circuit 58. Since an ^M l "signal is also applied from the output circuit of the NOR circuit 124 to the AND circuit 60, with the exception of switch positions 3 and 8, a" 1 "signal is also generated by the output circuit of the AND circuit 60, to excite the relay coil CR4-C. This closes the relay contacts CR4-1 to close an excitation circuit for the stepping switch excitation coil CR5-C. The stepping switch SS is therefore moved from position 5 to position 6, the special clearance interval for traffic route A.

Traffic route A, switch position 6.

The special evacuation interval No. 1 of traffic route A is a journey interval of the traffic route A, as shown in FIG

with
is. This interval is measured by the standard timer T1. The duration of this interval depends on the value of the reference voltage V, which is set with the potentiometer 44. When the output voltage V _{0 of} the generator 30 is substantially equal to the reference voltage V ", the comparison circuit 32 of the timer T1 applies a" 1 "signal via the OR circuit 54 to the AND circuit 56. Since the variable start time timer T2 has ended its time measurement, the comparison ^{circuit 32 also applies an M} 1 "signal to the AND circuit 56. The AND circuit 56 accordingly applies a" 1 "signal

009818/0816

BATH

via the OR circuit 58 to the AND circuit 60. Since a ^U l "signal is also applied from the output circuit of the NOR circuit 124 to the AND circuit 60 / with the exception of switch positions 3 and 8 _f , an ¹¹ I "Signal is generated from the output circuit of AND circuit 60 to energize control relay coil CR4-C. This closes the relay contacts CR4-1, which in turn closes an excitation circuit for the stepping switch coil CR5-C. The step switch SS is switched from its position 6 to position 7, the green interval no. 2 of the traffic route A.

Traffic route A ₁ switch position 7. ·

The green interval no. 2 is a travel interval of the traffic route A as shown in FIG. 4, and is measured with the green part no. 2 of the timer T4. The duration of this interval depends on the value of the reference voltage V, which is dependent on the setting of the potentiometer 82 during the step switch position 7. When the switch is in position 7, a B + potential is applied to the input circuit of the AND circuit 86 via the step switch contacts SS6-7. If the AC voltage source L4 does not fail, a “!” Signal is also applied from the rectifier circuit 88 to the AND circuit 86. As a result, AND circuit 86 applies a "1 ^H ~ signal to NOR circuit 84, which in turn applies an" O ^ signal to the input circuit of timer T4. The timer T4 thus begins its time-measuring function and, when the output voltage V of the generator 30 is substantially equal to the reference voltage V, a "1" -

The signal from the output circuit of the comparison circuit 32 of the timer T4 is applied to the input circuit of the AND circuit 96. A '"!" Signal

009818/0816
BAD ORtQfNAL

- is also applied from the voltage source B + via the step switch contacts SS6-7 to the input circuit of the AND circuit 96. Accordingly, the AND circuit 96 applies an ^M 1 ^H signal via the OR circuit 58 to the AND circuit 60. Since a "1" signal is also applied from the output circuit of the NOR circuit 124 to the AND circuit 60 / With the exception of switch positions 3 and 8, AND circuit 60 applies a "1" signal to relay contacts CR4-1 to close an excitation circuit for stepping switch coil CR5-C. As a result, the step switch SS is moved from its position 7 to position 8, the green dwell interval of the traffic route A.

Traffic route A, switch position 8.

The green dwell interval is not a timed interval. the Control unit for traffic route A will remain in this position until a vehicle is detected on traffic route B. In particular, it is possible that a traffic recording in the traffic route B, which the control unit of the traffic route A initiated to be brought to their position 3, for example by a bad functioning of the systems was lost during the time that the Control unit would need to advance to position 8. Accordingly so that stop signals are not sent to all traffic routes during given this state, the control unit of the traffic route A remain in its position 8. When the traffic detection in the traffic route B is still present, or at the point in time when traffic is detected in traffic route B, an electrical circuit is used for excitation the step switch coil CR5-C closed. The step switch coil CR5-C is excited by a circuit connected to the voltage

009818/0816

BATH ORIGINAL

source Ll begins in the control unit of the traffic route B, and Via the step switch contacts SS7-1O, 11 via the closed Relay contacts CR2-3, which detect traffic in the traffic route via the switch SW-3 and then via the step switch contacts SS5-8, of traffic route A, switch SW-5 to the NOR circuit 125 leads. As a result, it becomes a "1" signal from the output circuit of NOR circuit 125 to energize relay coil CR4-C. This closes the relay contacts CR4-1 to supplement an excitation circuit for the step switch coil CR5-C. As a result, the step switch SS is moved from its position 8 to the position 9 the vehicle summation interval No. 2 of traffic route A.

Traffic route A ₄ switch position 9.

Vehicle summing interval No. 2 is a caution interval for the traffic route A, as shown in Figure 4, and it is measured with the normal timer Tl. The duration of this interval depends on the value of the reference voltage V_, which is

meter 46 is set. If the output voltage V of the generator is essentially equal to the reference voltage V, then the comparison circuit 32 of the timer Tl eh will apply a "1" signal to the AND circuit 56 via the OR circuit 54 ′. Since the variable start time timer T2 has ended its time-determining function, its comparison ^{circuit 32 also applies an M} ! "Signal to the AND circuit 56. Accordingly, the AND circuit 56 applies a"! "Signal via the OR circuit 58 to the AND circuit 60. Since a "1" signal is also applied from the output circuit of the NOR circuit 124 to the AND circuits 60,

009818/0816

BAD ORlQlNAU -

With the exception of switch positions 3 and 8, a "Γ" signal is generated from the output circuit of AND circuit 60 to energize control relay coil CR4-C. This closes contacts CR4-1 which in turn creates an excitation circuit for stepper switch coil CR5- C. As a result, the step switch SS is moved from its position to position 10, the red dwell interval No. 1 of the traffic route A ₀

As the step switch SS was brought from its position 8 to the position, the ground potential, i.e. the Ll voltage, was above the relay contacts CR4-1, the switch SW-I, the step switch contacts SS4-8 of the traffic route A and then above the step switch contacts SS4-10 of the traffic route B connected to an excitation circuit via the switch SW-2 of the traffic route B and the step switch coil Close CR5-C of traffic route B. Accordingly, the step switch SS of the traffic route B is out of his Position 10 brought to position 11, the red dwell interval No. 2 of traffic route B.

Traffic route A, switch position 10.

The red dwell interval No. 1 is a stop interval for the Veikehrsweg A, as shown in FIG. The control unit of the traffic route A will remain in position 10 until it passes through the traffic is operated. During the step switch SS of the traffic route A was brought from its position 9 to the position IO, the Ll voltage source above the relay contacts CR4-1, via the switch SW-I of the traffic route A, the step switch contacts SS4-9 of traffic route A and then, in the control unit of the

009818/0816

Traffic route B, via the step switch contacts SS4-11 and the Switch SW-2 switched to an excitation circuit for the "stepper switch coil." CR5-C of the traffic route "B". As a result, the step switch SS of the traffic route B. is out of its position 11 brought into position 1, the special summation interval no.2 (Stop) of the traffic route B. The control unit B now takes over the

be <

Control, and is ^ ginnen their intervals no. 1 and no. ^F to be measured 2, and then to remain in their green dwell interval, the step 3 that switch position no. Of the traffic route B until a signal from the control unit of the traffic route A received, which represents a traffic detection in.Verkehrweg B. * The operating sequence for the control unit is the same as it has just been described with reference to the control unit A.

Although the invention so far in connection with a fully automatic Traffic control system for two traffic routes, the two control units A and B to control the flow of traffic above the Crossing of two traffic routes A and B, it is noted that this invention is now also in connection with a semi-automatic control system for two traffic routes that contains a single control unit, can be used. In particular, the control unit A, which was previously described in relation to FIG has been described, can be converted into a semi-automatic traffic controller for two traffic routes. This transformation happens by opening the switches SW-I, SW-2, SW-3, SW-4 and SW-5 and through Close switches SW-6 and SV7-7. In addition to operating these switches, appropriate load relay changes should be made so that the step switch SS the signal lamps of the main

009818/0816

and cross street during the appropriate step switch intervals switches to a voltage source. After these changes have been made, a plot of the traffic intervals above the Step switch positions have the form shown in Figure 1 (version 1) is shown for a semi-automatic traffic controller for two traffic routes. In particular, it should be noted that the step switch positions 10, 11 and 1 to 6 represent the stop period for main road traffic, the step switch positions 7 and 8 serve as the driving period of the main road and the step switch position 9 the caution or yellow period of the Main street is. Likewise, under these conditions it is noted that the step switch positions 6 to 11 and 1 as red or Stop period of the cross street, the step switch positions 2 to 4 serve as green or driving period of the cross street and the Step switch position 5 the yellow or caution period of the cross street is. As is generally the case in traffic control technology for such semi-automatic traffic controllers for two traffic routes the cross street is the traffic route with traffic and the main street is the non-traffic route.

WAIT GAP REDUCTION CIRCUIT.

According to the present invention, the waiting time gap reduction circuit comprises the transit time timer T3 and the waiting time minimum lull timer T5, which are shown in the block diagram of FIG. Refer now to Figure 2 which shows the preferred circuit schematic diagram of these two circuits.

009818/0816

BATH

TRANSIT TIME TIMER.

The transit time timer T3 has a linear sawtooth generator 30 and a comparing circuit 32. The generator 30 is in the form of a negative feedback DC operational amplifier and normally has the PNP transistors 130 and 132, an NPN transistor 137, a feedback capacitor 136, and an A _u sgangswiderstand 138 The emitter of the transistor 130 is connected directly to the voltage source B +, and its base is connected to the junction of the resistors 142 and 144 via a time-determining input resistor 140. The resistors 142 and 144 are connected in series and form a voltage divider 48 between the voltage source B + and the crowd. The collector of transistor 130 is connected directly to the bath of transistor 134. A capacitor 146 is connected between the emitter of the transistor 134 and the bath of the transistor 130. The collector of the transistor 134 is connected to the voltage source B + via a resistor 148. The connection of transistor 148 and the capacitor of transistor 134 is at the output circuit of OR circuit 72 (see Figure 3), and at the same time at the base of transistor 132. A voltage divider with series resistors 150 and 152 is between the voltage source B + and ground for the purpose of lowering the collector voltage of transistor 130. The connection point of the resistors 150 and 152 is connected to the emitter of the transistor 134 and at the same time led to the collector of the transistor 132 via the capacitor 154. The negative feedback capacitor 136 is between the collector of the transistor 132 and the connection point

009813/0816
'ORIGINAL

of the resistor 140 and the base of the transistor 130. The output resistor 138 is between the connection point of the Capacitor 136 and the collector of transistor 132 and ground.

The comparison circuit 32 of the timer T3 is preferably in the form of a differential amplifier with NPN transistors 156 and 158. The emitters of the two transistors are connected together and are connected to the voltage source B- via a resistor 160. the The base of the transistor 156 is connected to the junction of the resistor 138 and the collector of the transistor 132 via a diode with the polarity shown in FIG. The collector of transistor 156 is connected to the voltage source via resistor 164 B + connected. The junction of resistor 164 and the collector of transistor 156 is to the output circuit of the

AND circuit "2 connected via the transistor 155. The collector

of the transistor 158 is also via the resistor 166 to the voltage source B + switched on. The base of the transistor 158 is connected to the wiper of the potentiometer (see Figure 3) and via its diode 168 with the polarity shown in FIG.

WAITING MINIMUM FLOOD TIMER.

The waiting time minimum slack timer generally includes one linear sawtooth generator 30 * made up of components, which are complementary to those of which the generator 30 of the timer T3 consists, and a differential amplifier 32. The Generator 30 * has three NPN transistors 170, 172 and 174 and a PNP transistor 176 and a feedback capacitor 180.

009818/0816
BAD ORIGfNAi.

The emitters of transistors 170, 172 are connected together and Applied to the voltage source B- via a resistor 182. the The base of the transistor 170 is above the waiting time potentiometer Io2 to the junction of resistors 184 and 186, which make up a voltage divider 104. Resistance 186 and that Potentiometers 102 connect the base of transistor 170 to the

Slider arm of potentiometer 168 in the transit time timer. T3. The collector of transistor 170 is, and is, connected to the base of the same transistor port via capacitor 188 connected directly to the base of transistor 176. The, base of the Transistor 172 is connected to the junction of resistor 184 and the wiper arm of minimum slack potentiometer 106. This potentiometer is between the voltage source B + and the ground. The collector of transistor 172 is connected to the wiper arm of the potentiometer 68 is connected. A diode 190 with the polarity shown in FIG. 2 connects the base of transistor 172 to the base of transistor 170.

The connection point of the diode 190 and the base of the transistor is connected to the NOR circuit 108 (see FIG. 3). The NOR circuit Io8, as shown in FIG. 2, has an NPN transistor its collector with the base of transistor 170 through a resistor 109 is connected, the emitter of which is connected to the voltage source B- and its base is C over the WidexäbSnde 111 and 113 is due to mass. The negative output of the rectifier 112 is led to the junction of the resistors 111 and 113 and the positive output of the rectifier is led to the emitter.

009818/08 IG
BAD ORlGlNAl,

A resistor 150 is connected between the emitter and the junction of the resistors 111 and 113.

Capacitor 180 connects the emitter of transistor 176 to the base of transistor 170. Also is the emitter of the transistor 176 to the collector of transistor 170 through a resistor 192 tied together. The collector of transistor 176 is across a resistor 194 connected to ground. The transistor 174 has its emitter connected to ground and its base is to the connection point of the resistor 194 and the collector of the transistor 176. The collector of the transistor 174 is also connected to the wiper arm of the Potentiometer 71 connected through resistor 178.

The differential amplifier 32 of the waiting time minimum lull timer T5 has four NPN transistors 196, 198, 200 and 202. The transistor 196 has its collector with the voltage source B + connected and its base is at the connection point of the resistor 178 and the collector of transistor 174 out. The emitter of transistor 196 is directly connected to the base of the transistor 198 connected. The collector of transistor 198 is connected to voltage source B + through a resistor 2o4. The emitter of transistors 198 and 200 are connected together and then across a resistor 206 is fed to the voltage source B-. The collector of transistor 200 is connected to the voltage source B + via a Resistor 2C8 connected. The collector of transistor 200 is also connected to the input circuit of OR circuit 100 (see Figure 3), connected via the PNP transistor 2ol. The transistor has 2ol

009818/0816

ORIGINAL BATHROOM

its collector connected to the OR circuit 100, its emitter is fed to the voltage source B +, and its base is connected to the collector of the transistor 200. The transistor 2o2 has its collector connected to the voltage source B + and the emitter is directly connected to the base of the transistor 200. In addition, the base of transistor 202 is connected to the junction of resistor 132 and the collector of transistor 132 connected in the transit time timer T3.

DETAILED DESCRIPTION OF THE OPERATION OF THE WAIT GATE REDUCTION CIRCUIT.

As long as the OR circuit 72 applies a "1" signal, ie a positive potential, to the base of the transistor 132, the output voltage V _{1 of} the generator 30 of the drive-through timer T3 is essentially equal to the ground potential. The setting of the wiper arm of the potentiometer 71 determines the setting of the passage time, see setting V (passage time setting) in Figures 5, G, 7 and 8. During the time when the OR circuit 72 has a "1" signal to the base of transistor 132 is applied, the negative side of capacitor 136 is grounded and the capacitor is charged by the current flowing from the emitter to the base of transistor 130. The value of the accumulated charge of the capacitor 130 is therefore equal to the value of the B + potential minus the voltage drop between the emitter and base of the transistor 130.

72
When the OR circuit / an ^M O "signal, i.e. a potential between B +

and ground potential applied to the base of transistor 132

009818/0816 BADORIGINAt '

the transistor will conduct. A voltage drop is generated at the fceit-determining input resistor 140. The value of this voltage is determined by the potential _f that is stored by the capacitor 136, and the setting of the voltage divider consisting of the resistors 142 and 144. The capacitor 136 begins to discharge through the resistors 140, 144 and 138, the stored Potential of the capacitor decreases slightly. As the potential of capacitor 136 decreases, transistor 130 begins to conduct. A current begins to flow from the voltage source B + via the emitter to the collector of the transistor 130 in the base of the transistor 134, whereby the transistor 134 becomes conductive. As the transistor 134 begins to conduct, its collector potential decreases towards ground. When this happens, transistor 132 begins to Mten. A current therefore flows from the emitter to the collector of the transistor 132, whereupon a voltage at the output resistor 138 is built up. This increase in voltage across resistor 138 lifts the potential of the negative end of capacitor 136 above ground potential. Since the voltage on capacitor 136 cannot change suddenly, the potential of the positive end of the capacitor is also instantaneously raised by the same amount as the negative end. This aims to turn off transistors 130, 134 and 132. The capacitor 136 then discharges through the resistors 140 to 144 and 138. The transistors 130, 134 and 132 begin to conduct again and continue to raise the voltage at the output resistor 138. The price of electricity continues to work in this way, so that for a rectangular input wave, a linear sawtooth function is generated which is used as the output

009813/0816

BATH ORIGINAL

156685Ί

voltage V _{1 occurs} at resistor 138. The voltage V. rises linearly with the elapsed time from the ground potential to the value B + of the voltage source. As long as the timer T3 is not reset, for example by momentarily applying an ^M 1 "signal from the OR circuit 72 to the base of the transistor 132, this linear SSgezahngenerator will continue to function until the transistor 132 is saturated.

The output voltage V. of the generator 30 is constantly with the reference voltage V_, which was set with the potentiometer 71, compared with the comparison circuit 32 of the timer T3. First, the output voltage V, is equal to the ground potential. To this At this point in time, the potentiometer 71 provides a positive reference potential for the anode of the diode 168. The greatness of this potential is passed through the diode to the emitter of transistor 158, so that a positive potential at the junction of the Emitter of transistors 156 and 158 appears. This potential is equal to the value of the voltage at the base of the transistor 158 is minus the base-emitter voltage drop of the transistor 158. Since the output voltage V. is initially equal to ground potential, and a positive potential at the junction of the emitters of the transistors 156 and 158 appear, transistor 156 is blocked. Transistor 158, on the other hand, is enabled and conducting. Under · under these conditions the value of the voltage at the collector of transistor 156 is essentially equal to that of voltage source B +,

Has

and the voltage at the collector of transistor 158 ^ αηεη value between Ground potential and the value B + of the voltage source. Accordingly

0 09818/0816

eier transistor 155 is blocked, so that an ^H 1 "signal is not applied to the input circuit of the AND circuit 70 (see FIG. 3).

When the OR circuit 72 ^{applies an "O H"} signal to the base of the transistor 132, the output voltage V is a linear sawtooth function which increases with the elapsed time from the value of the ground potential to the value of the voltage source B + Period, the value of voltage V- is substantially equal to or greater than the value of reference voltage V, whereupon transistor 156 is enabled and begins to conduct. This causes transistor 155 to be enabled and an ^M 1 "signal to the Input circuit of AND circuit 70 applies to bring about the termination of the intervals.

The transit time timer T3, however, is reset as a function of each vehicle detection in the associated traffic route A. That is, for each operation of the sensor Dl, D2 (see Figure 3) is energized the relay coil CRL-C and its contacts CRL-3 closed * The closing of the contacts CRL-3 sets a "1 ^M signal from the voltage. Source B + via the normally closed relay contacts CR3-2 via the contacts CRl-3 to the input circuit of the OR circuit 72. The OR circuit 72 in turn applies an ^M 1 ^M signal to the base of the transistor 132, whereby the input voltage V is brought to ground potential The transit time timer T3 is in operation during switch positions 2, 3 and 4. In particular, during switch positions 3 and 4, the potential L4, ie the hot side of the alternating voltage source, is via the step switch contacts

009818/0816

BATH ORIGINAL

SSl-2, 3 or 4 of the traffic route A and then applied to the NOR circuit 76 ^{via the rectifier 78 as a W} 1 ^{M signal.} The NOR circuit 76 in turn gi ± an "O" signal to the input circuit of the OR circuit 72. During the remaining step switch positions, the NOR circuit 76 applies a "!" Signal via the OR circuit 72 to the input circuit of the Timer T3 _f so that it remains reset so that the output voltage V, is equal to ground potential. In addition, the drive-through time timer is reset in the event of a failure of the AC voltage source, ie in the event that the AC voltage source L4 fails, the NOR circuit 74 applies a "1" signal via the OR circuit 72 to the timer so that it remains reset

We now refer to Figure 2 and in particular to the Waiting time-minimum lull * -timer T5, in which -the potentiometer 106 and 102 are used to set the corresponding waiting time and the minimum lull period. The function of these two potentiometers is a minimum allowable lock between vehicle sensor actuations to ensure that it must not be exceeded so that the driving signal is maintained. This function reduces the time that one or more vehicles have to wait in the cross path in front of the stop signal, which avoids unnecessary delays, and the The performance of the intersection is increased.

The timer T5 is during switch position 4 of the traffic route A in operation when a signal from the other traffic route, 'deviates represents that there are vehicles in the other traffic route, is generated. In particular, with reference to Figure 3,

009818/0816
BATH ORIGINAL

notes that if the control unit B is addressed by traffic so that its contacts CR2-3 are closed, the potential Ll from the control unit B via the step switch contacts SS7-1O, 11 and relay contacts CR2-3, via switch SW-3 and via the step switch contacts SS8-4 of the traffic route A to the AND (alternating voltage ^ Circle 110 placed. As long as the voltage L4 does not fail, the AND (alternating voltage) circuit 110 applies an alternating voltage signal to the rectifier 112. The rectifier 112 sends an "O" signal to the NOR circuit 108, which on the one hand has a "!" signal to the input circuit of the timer T5, whereupon the timer performs its time-measuring function, as described above, the generator 30 * of the timer T5 has components that are complementary are to those used in the generator 30 of the timer T3, and accordingly the output voltage V increases of the generator 30 * linearly with the elapsed time of 4 minutes The value between ground and the voltage value B + of the voltage source decreases towards ground.

During the reset state of the timer T5, i.e. when If no voltage is present at the output circuit of the rectifier 112, the transistor 108 is unlocked and conductive, since its base is at ground potential and its emitter at the voltage source B-.

Accordingly, the negative feedback capacitor 180 charges with the in Figure 2 shown polarity. This charge is limited by the setting of the minimum slack potentiometer 106. The value the charge is essentially equal to the value of the reference voltage Y,

009818/0816

BATH ORIGINAL

as set with potentiometer 71, minus the value the voltage on the wiper arm of the minimum slack potentiometer 106. The transistor 172 is activated by the setting of the wiper arm of the Potentiometer 106 unlocked so that the transistor is conductive. Accordingly, the potential of the emitters of the transistors becomes and 172 are raised to a sufficiently high positive value so that

the transistor 170 is blocked. The transistor 176 is blocked by the positive potential at its base with respect to that of the emitter. Since transistor 176 is not conductive, transistor 174 does not conduct. Accordingly, the voltage V ₂ between ground and the junction of the collector of transistor 174 and resistor 178 may have a value substantially equal to the value of the reference voltage V _n as set with the drive-through timer potentiometer 71.

If a traffic detection in the other traffic route during the Time occurs, since the control unit A is in position 4, a circuit to the AND (AC voltage) circuit 110 is closed, so that this circuit sends an AC voltage signal to the rectifier 112 creates. As a result, the rectifier 112 applies a negative voltage signal to the connection point of the resistors 111 and 113 thereby reducing the voltage at the base of transistor 108 negative enough to block the transistor. Since the transistor 108 is now blocked, the blocking of the transistor 170 is released. That means the potential at the base of transistor 170 goes positive with respect to its emitter, thereby enabling the transistor and making it conductive. This creates a

009818/0816

BATH ORIGINAL

-se- 1568851

sufficiently large negative voltage is connected to the base of the transistor so that this transistor is unlocked and conductive. Since the transistor 176 is conductive, a sufficiently large positive voltage is applied to the base of the transistor 174 so that this transistor also becomes conductive. The output voltage V- decreases accordingly. This decrease in voltage reduces the potential at the positive end of the feedback capacitor 180 towards ground potential. Since the voltage on the capacitor 180 cannot suddenly change, the potential of the negative end of the capacitor is shifted into the negative by the same amount as this as the positive end. This causes transistors 170, 176 and 174 to turn off. The capacitor 180 then discharges somewhat. The transistor 170 begins to conduct again and thereby reduces the output voltage V _? Further. The circuit continues to function in this way, so that a linear sawtooth function is generated for an input square wave, which appears as output voltage V ₂ . The output voltage V_ decreases linearly with the elapsed time from a value between the ground potential and the voltage B + of the voltage source, as given by the setting of the potentiometer 71, towards the ground potential, but is limited at the lower limit by the setting of the minimum lull potentiometer 106 .

The output _{potential V 2 of} the generator 30 * and the output potential V 1 of the generator 30 of the timer T3 are continuously compared in the comparison circuit 32 of the timer T5. The comparative

009818/0816

BATH ORIGINAL,

1565851

Circuit 32 in timer T5 operates in essentially the same manner as comparison circuit 32 in timer T3, see above, and therefore it is believed that no further description is necessary in order to fully understand this invention. Initially, the output _{potential V 1 is} equal to ground potential and the potential V ₂ has a value between ground potential and the value of the voltage source B +. Accordingly, the transistor 200 is blocked. If, however, the voltage V ₂ falls below the value of the voltage V, the transistor 2oo will remain open and give an unblocking potential to the base of the transistor 2ol. As a result, the transistor 3ol conducts and applies the potential B + _t ie a "1" signal to the input of the OR circuit 100.

We now refer to Figures 5, 6, 7 and 8 in which the Voltage versus time for various operating conditions of the Latency gap reduction circuit are indicated. In the Figure 5 is the level of the voltage V_ the setting of the passage time, as it was done with the potentiometer 71. The voltage value V .._ can be adjusted by setting the minimum slack potential

MJj

meters Io6 can be reduced. The slope of the curve of the output voltage Vp is determined by the setting of the waiting time potentiometer 1O2 determined. At time t in switch position 2, the Drive-through timer T3 energized and the output voltage V. increases linearly with the elapsed time to the value of the transit time setting V on. At time t, the transit ends

K JL

Trip time timer measuring what is in the switch positions

009813/0816

BATH ORIGINAL

2 or 3 can occur, but its output does not produce any Control function because the AND circuit 70 (see FIG. 3) will not generate an output signal until the step switch is in position 4 At time t., The transit time timer is not yet has been reset and a signal has been received from the other control unit received, whereupon the step switch immediately from the position

3 is brought into position 4. As the transit time timer has finished its timing, the AND circuit 70 will apply a "!" signal via the OR circuit 54 and the step switch move from position 4 to position 5.

We now refer to the diagram of FIG. 6, which shows a somewhat more complicated situation than FIG. Again at time t, the transit time timer T3 is energized, specifically in position 2. At time t .. the transit time timer ends its measurement in positions 2 or 3, but it does not perform any control function. At time t_wild, the drive-through timer is reset by a vehicle detection in traffic route A, whereupon the drive-through timer begins its time-determining function again and the output voltage V _{1 increases} linearly against the value of the reference voltage V _{Q Mn} . _{At the} moment

t_ a vehicle was detected in the other traffic route, whereby the control unit A moved from position 3 to position "4" and the waiting time minimum slack timer T5 was energized. At the instant t ^ the value of the voltage V. is essentially equal to the value of the voltage V «, whereupon the timer T5 a

009818/0816

BATH ORIGINAL

"1" signal to excite the coil CR1-C (see Figure 3) and to open the contacts CR3-2. As a result, there will be further actuations of the sensor Dl, D2 of the traffic route A the transit time timer Do not reset Tl. The output voltage increases accordingly V, continues on until it is substantially equal to the value of the reference voltage V_. Des occurs at time t_ and the

R Tue

Drive-through time fc timer outputs a "1" signal to AND circuit 70 ". Since the step switch is in switch position 4, the AND circuit 70 sends a "1" signal to OR circuit 54, whereby the step switch is moved from position 4 to position 5.

We now refer to FIG. 7, which shows an even more complicated situation than that shown in FIG. The transit time timer is energized again at time T, specifically in switch position 2. At time t ^ we receive a signal from the other traffic route, whereupon control unit A is moved to position 4. The waiting time minimum lull timer T5 is energized and begins a linear gap reduction. It is noted that during the time period from time t to time t-the actual gap between successive vehicles in traffic route A must be continuously reduced in order to maintain free travel depending on the waiting time of a vehicle on the traffic route from which the signal originates. At time t ₂ , the waiting time period, as set with potentiometer 102, is set to the minimum idle voltage V., _

which was set with potentiometer 106. The flow of traffic in route A was such that the sought-after calm

009818/0816

was not found. Accordingly, the traffic in the traffic route A is allowed to continue flowing under these conditions. At time t, the slack condition is found. In other words, the output voltage V ₂ is now stabilized at the value of the voltage V, and this value has been reached by the voltage V ₁ . Accordingly, the timer T5 generates a "1 ^M signal via the OR circuit .100 in order to reset the property of the transit time.

To cancel the timer T3. The control unit remains in interval 4 until the passage time interval has ended, namely at the point in time t .. During this period, further actuations of the sensor Dl and D2 in traffic route A do not return the transit time timer. At time t. the transit time timer has its Measurement finished and generates a "!" Signal at the input circuit of the ÜND district 7O. Accordingly, the step switch is moved from switch position 4 to switch position 5.

We now refer to the diagram of Figure 8, one more represents a more complicated situation than Figure 7. It is reminded of Figure 7, in which the minimum lull setting V .._ at the time

ML

point tj was reached without completing the timing of the transit time timer. It is noted that during heavy traffic conditions on the traffic route A it is possible that the actual time gaps between successive vehicles can be sufficiently small that the output voltage V i of the transit time timer never equals the value of the voltage V _w _ can reach. This condition is made possible by the setting of the potentiometer ÜO belonging to the Lura Extension Limit Interval Timer T4.

009818/0816

BAD OFUOfNAL

wounds, see FIG. 3. As shown in FIG. 8, the conditions at time t are the same as in FIG. 7. However, at time t_ the setting of the extension limit interval timer is such that the extension limit interval timer T5 has finished its time measurement , and applies a "!" signal to the OR circuit 100, via the AND circuit 98, whereby the reset property of the transit time timer is canceled. Accordingly, the drive-through timer ends its time-measuring function in position 4 and at time t. When the voltage V _{1 has reached} the value of the drive-through time reference voltage V, the timer T3 applies a "1" signal to the AND circuit, whereby the step switch is moved from position 4 to position 5.

Once the step switch is in position 5, the drive-ζeugrumsinterval No. 1, the normal timer begins its timing function, as described above.

009318/0816
BATH ORIGINAL

Claims (14)

Claims 1. A traffic controller for alternating issue of driving and Stop signals to at least two intersecting traffic routes, of which each vehicle sensor has around the vehicles in the associated one Detect traffic route, the traffic controller a waiting time gap reduction switch circuit to initiate a change in the allocation of travel and stop signals to the traffic routes in Dependency of the actual gaps between successive vehicles in one traffic route and the time during which a detected vehicle is waiting in the other traffic route that is currently entering Stop signal is assigned, has, identified by the Waiting time gap reduction circuit consisting of a first timer circuit (T3) which has a first signal generator (30) for generating an actual gap signal (V,) which progressively changes in a linear manner with the elapsed time between two successive ones detected vehicles in the one traffic arm, Sndert, has a second timer circuit (T5) the one Second signal ^ / generator (30 *) for generating a waiting time signal (V_) which changes progressively in a linear manner with the elapsed time during which a detected vehicle waits in the other traffic route to which a stop signal is currently assigned, and a comparison circuit (32 in T5) for comparing the actual gap signal (V ₁ ) and the waiting signal (V ₂ ) and for generating a signal for initiating the termination of the travel signal allocation to the one traffic route when the actual gap signal and the waiting signal are one achieve a predetermined relationship with one another. 009818/0816 BATH 2. Traffic regulator according to claim 1, characterized in that the first (30) and second (30 ') signal generator each determine the actual gap and waiting signals as voltage potential, which change linearly in their value with the passage of time, produce. 3. A traffic controller gemSss claim 1 and 2 _t characterized in that the first (30) and second (3O ^f) signal generator, the actual gap and wait signals as voltage potentials that approach in a linear manner in its value with the elapsed time, so that after a given period of time the potentials are essentially equal in their values. 4. A traffic controller according to claims 1-3, characterized by a cancellation circuit {CR3-2, CRl-3, 72) for resetting the first signal generator (30 in T3) of the first timer circuit (T3) after each detection of a vehicle in traffic «Away to which a travel signal is currently assigned, whereby the first signal, which is generated by the first timer circuit _/ changes progressively in a linear manner with the elapsed time between two successive detected vehicles in the one traffic route. 5. A traffic regulator according to any one of claims 1-4, characterized by a third timer circuit (T4) for measuring a certain maximum time period in parallel with the time measurement and
of the second timing circle (T5) / sura Generate a first deletion 009618 / BAD ORtOiNAt atffhebesignals and an erasure cancellation circuit (98, lOO _f CR3-C) which connects the third timer circuit (T4) to the cancellation circuit (CR3-2, CRl-3.72) in order to reset the first generator (30) in response to the first erasure cancellation signal _# what each further to the
Detection of vehicles in ^ / a traffic route no backwashing of the first generator (30) of the first timer circuit (T3) causes. 6. A traffic regulator according to one of claims 1-5, characterized characterized in that the first timer circuit (T3) makes a comparison, circle (32nd in T3), for comparing the actual gap time signal (V _1. With a reference signal (V) for generating an output signal i; R for terminating the signal allocation to the one traffic direction when the actual time gap signal and the overturn signal a predetermined one Have relationships with each other. 7. A traffic regulator according to one of claims 1-6, characterized by a circuit (66, B +). for generating a reference signal for the comparison circuit (32 in T3) of the first timer circuit (T3) as reference voltage (V). 8. A traffic regulator according to claim 7, characterized by a adjustable circuit (71) for generating the reference signal (V), whereby the time delay between the application of voltage to the first generator circuit (30) and the generation of the output signal of the comparison circuit (32 in T3) of the first timer circuit (T3) is directly proportional to the set reference signal. 009818/0816 A traffic regulator according to any one of claims 1-8 _# characterized by a feed circuit (CR2-3 in B, 110, 112,108) for applying voltage to the generator (30 'in T5) of the second timer circuit (T5) as a function of a detected vehicle in the other traffic route, which is currently assigned a stop signal, whereby the first signal generated by the second timer circuit (T5) changes in a linear manner with the elapsed time during which the detected vehicle waits in the other traffic route at the stop signal Erasure cancellation circuit (98,1OO, CR3-C) for switching off the erase circuit (CR3-2, CRl-2,72) depending on the output signal of the comparison circuit (32 in T5) of the second timer circuit (TS), whereby further acquisitions of vehicles in the cause a traffic route no resetting of the generator (30 in T3) of the first timer circuit (T3), and a signal change circuit (70,54,56,58,60, CR4-C), which is based on the output signal of the comparison circuit (32 in T3), the first timer (T3) responds to initiate a change in the allocation of the drive, t and stop signals to the traffic routes. 10. A traffic regulator according to any one of claims 1-9, characterized by a maximum timer (T4) which is connected to the supply circuit (CPx.2-3 in B) for a certain maximum time period parallel to the operation of the generator (30 'in T5) of the second To measure the timer (T5) and to generate an erasure cancellation signal, wherein the cancellation circuit (98,100, CR3-C) is connected to the maximum timer (Τ4) for receiving the cancellation signal around the Deactivate the extinguishing circuit (CR3-2, CRl-3) regardless of whether or not on 009818/0816 an output by the comparison circuit (32 in T5) of the second ZeitgeberkteLses (T5) was generated. 11 .. A traffic regulator according to one of claims 1 to 10, characterized by a circuit (102) for limiting the value of the first signal that from the generator (30 * in T5) of the second Timer circuit (T5) is generated to a certain value, so that the signal is progressive in a linear manner in value changes with the elapsed time until it reaches a value which is equal to the determined value, whereupon the signal becomes a continuous signal with a certain value. 12. A traffic regulator according to any one of claims 1-11, characterized in that the generator (30 * in T5) of the second timer circuit (T5) is constructed from components which essentially are complementary to the components of the generator (30 in T3) of the first timer circuit (T3), whereby the first signal from the first timer circuit (T3) and the first signal from the second timer circuit (T5) in their value progressively in a linear manner approach each other as time has passed. 13. Traffic regulator according to one of claims 1 - 12, characterized characterized in that each of the first signals is a voltage potential, and that the comparison circuit (32 in T5) of the second timer circuit (T5) a differential amplifier to compare the Possesses potential. 14. A traffic regulator according to claim 12, characterized in that that each generator (30 in T3, 30 * in T5) first (130,170) and 009818/0816 BATH ORIGINAL second (132,174) transistors of equal conductivity, one third transistor (134,174) of opposite conductivity type like the first and second transistors, with each of the transistors first (collector), second (emitter), and control (.base) Has electrodes and the first electrodes (collectors) of the first (130,170) and third (134,174) transistors, respectively directly to the control electrodes (base) of the third (134,174) and second (130,170) transistors are connected, and a capacitor (136,180) which is the first electrode (collector) of the second Transistor (132,174) connects to the control electrode (base) of the first transistor (130,170). 009818/0816 Blank page