DE3241438C2 - Method for controlling transportable traffic light systems - Google Patents

Abstract

For the synchronous operation of transportable traffic light systems, each individual traffic light generator has its own power supply, its clocked quartz timer and a light signal program. In order to ensure synchronization and to prevent incorrect work, the invention proposes that radio signals be exchanged between the individual light signal generators with each light signal change, which signals reflect the switching status of the respective light signal generator. By comparing these radio signals and corresponding feedback, the synchronous operation can be safely maintained and the entire system can also be switched off if the signal lights fail or the light signal system sends incompatible signals to the individual light signal generator.

Description

In writing, different digitally modulated signals can be emitted and received.

To synchronize two or more light signal generators, the quartz control unit gives -1 via the Synchronizing circuit 7 to the digital modulation 6, preferably only once per light signal cycle, a signal, which is broadcast by transmitter 5. The other light signaling devices take this via their receiver Signal, which is decoded in the associated digital modulation and via the synchronization to the Quartz time control of the associated quartz timer is passed on, where there is, if necessary, a Brings synchronism with the quartz timer, which caused the synchronization signal that was sent out. This radio transmission described above has nothing to do with the light signals at traffic lights 1 and to do their signal sequence. The program generator sets this signal sequence 3 fixed

The signal locking circuit shown in the drawing 8 is connected to a red light sensor 9 and a green light sensor 10. These transducers 9 and OK determine whether or not a current is flowing in the bulb circuit of the red or green signal light not. By making a comparison with the programmer 3, the security circuit 8 can determine at any time whether the program is properly reflected in the signal light or not. The security circuit is with the digital modulation 6 and the transmitter / receiver 5 via a shutdown circuit 11, a Red light monitoring circuit 12 and a green / green interlocking circuit 13 connected.

The security circuit 8, which communicates the status of its own light signal generator A to the other light signal generators via radio signals, is also able to evaluate incoming signals from the other light signal generators and compare them with the operating status of its own light signal generator via the aforementioned circles 11, 12, 13 .

How this is done in detail will be explained in detail below.

In this explanation, the aforementioned components 1 to 13, insofar as they relate to the light signal generator A , are provided with an index a. Correspondingly, when referring to components 1 to 13 of the light signal generator, an index b is used.

The green / green interlock for which the circle 13 is provided, has the task of preventing green signals from being sent to two or more light signal generators appeared which are not compatible with each other and which, if not recorded, lead to serious traffic accidents could lead.

As soon as the green light of the traffic light la is switched on in the control cycle in the system LZG A with the program 3a, the sensor OK and the safety circuit 8a detect this, so that a signal is emitted via the transmitter 5a via the circuit 13a and the digital modulation 6a . This signal is received in the receiver 5b of the light signal generator LZG B , via which the digital modulation 6b is evaluated and compared in the green / green lock 136. If there is no voltage to power the lights one of the green lamp rests b, nothing happens.

Should, however, be used in the control of the light signaling device LZG Z? If the green lamp of the traffic light \ b is supplied with voltage, the radio signal received by the traffic light transmitter LZG A immediately gives the command: "Switch off traffic lights". The safety circuit Sb activates the digital modulation 6b via the shutdown circuit Hb , so that the command: "Switch off the system" is emitted via the transmitter 5b.

This command is then received by the transmitter / receiver 5a, which has been switched to receive. The signal reaches the safety circuit 8a via the digital modulation 6a via the shutdown circuit 11a, which then ensures that the system is shut down. In this way, it is ensured in the permitted time of 0.3 seconds that both light signal transmitters LZG A and LZG B

ίο be switched off completely. You can first can be put back into operation by a maintenance person.

The red light monitoring, for which the circles 12 are intended, works as follows:

When the red lamp in the traffic light la is to be switched with the aid of the programmer 3a of the light signal generator LZG A , the sensor 9a detects whether a current is actually flowing in the lamp circuit or not. If the corresponding lamp current flows, nothing happens. If, however, no current flows due to any disturbance, i.e. the red incandescent lamp cannot burn, the digital modulation 6a is activated via the safety circuit 8a and the red light monitoring circuit 12a, so that an interfering signal lasting 0.5 seconds is transmitted via the transmitter 5a. This signal is received in the light signal transmitter LZG B in the receiver 5b , decoded and passed on to the red light monitoring circuit \ 3b , which then ensures that the entire light signal system is switched to yellow flashing light via the safety circuit Sb. All of the aforementioned switching operations take place within 50 milliseconds. The transition of the light signal transmitter A and B to yellow flashing light continues until the fault in the light signal transmitter LZG A is rectified.

If one sets z. B. an incandescent lamp with an intact filament, a current can flow again and the signal to switch to the normal sequence of signals is also given to the light signal transmitter LZG B on the route described. Since both the program 3b and the quartz timer 4 £> have continued to work there unchanged, the light signal sequence continues in the correct sequence in light signal transmitter B.

If you put a system into operation or want to check whether the radio link is working properly during normal operating hours, it is sufficient, for example, in the light signal transmitter LZG A to switch circuit 12a to "yellow flashing light" with a manual switch. This light signal transmitter LZG A then immediately changes to a yellow flashing light and reports this to the light signal transmitter LZG B by radio, which then also switches to a yellow flashing light. If the manual switch on circle 12a is switched back to the normal signal sequence, this normal state is passed on to the other light signal transmitter in a known manner and this also switches back to the normal sequence of the signal sequence.

The test procedure described above can also be identified by the light signaling device LZG B with the same effect and with the same security.

There, too, there is the same effect on the corresponding devices because of the similarity of the equipment Light signal transmitter given.

The above-described method according to the invention for controlling transportable traffic light systems has the following advantages:

1. The quartz time control devices are always synchronized by their own and not by external radio signals.

nized. A running away of the frequency due to thermal or other influences in the quartz crystals remains without effect. The synchronization takes place at the interval of a signal passage per pulse via radio.

2. The “GUIDELINES FOR LIGHT SIGNAL SYSTEMS - RILSA” - traffic light systems for road traffic - required signal protection is ensured

3. The functionality can be checked at any time in a very simple way. So that is a very high level of traffic control given at construction site traffic lights, so that also systems more complicated equipment with several light signal transmitters and several programs - is z. B. for crossing traffic with trams and pedestrian signals - can work safely.

4. The signal for synchronizing the quartz timer is only sent out when im A full signal cycle has expired.

5. Another advantage is to be seen in the fact that the aether does not send constant signals on the way. and the way back is filled compared to other radio controls much smaller, so that there are unfounded error messages will hardly come. This is very important for the flow of traffic on the road.

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Claims (5)

1 2 then via their transmitter to the receiver of the central patent claims: Communicate their operating status to the control unit in the form of an acknowledgment signal. Procedure for controlling a transportable light signaling system with at least two spatially 5 light signaling devices in the event of failure of the transmitter or the receiver, the central control system registers separate light signaling devices, all of which device the failure of the acknowledgment signal of the correspondingly disturbed light signaling device with a transmitter and a receiver, whereupon are subsequently a and according to a predetermined program, the emergency signal is transmitted by radio to all light signal generators, and that in the event of a fault in a light signal and subsequently all light signal generators are switched to the transmitter whose transmitter an interference signal is switched to every 10 of the malfunction.
Radio signal receiver emits, which leads to a disadvantage with this known light signal system switching or switching of the light signal system is that its entire control is carried out via the separate one, characterized in that each central control unit runs and a failure of the central signal change between all light signal systems Control unit, after this once properly exchanged bern radio signals, which has sent out the start signal to the 15, does not result in the switching state of the light signal emitting the individual light signal transmitter being switched off or reproducing on light signal transmitter, and that the on are switched to an emergency program. A failure of the receiver with incoming switching status signals or a malfunction of the central control device would not necessarily be noticed when comparing the switching status of the associated light signaling device and that in the event of incompatibility 20, the control device at least emits the interference signal when the control device is received. operation has worked properly so that the 'loading 2. The method as claimed in claim 1, characterized in that the individual light signal generators are not identified shows that all light signaling devices can be checked centrally one more quartz and thus a timer included, whereby the coordinated operation of the individual light signal emitters by one of the lights Incoming radio signals are no longer forcibly given by the system's transmitter is the sync signal emitted by the quartz timer. included, which of the radio signal receivers It is the object of the present invention for transevaluated and for comparison and if necessary portable, radio-controlled traffic light systems an Überzur Adjustment of the synchronous operation of the associated monitoring process to create that without a pull Quartz timer is used. 30 central control unit representing additional sources of error 3. The method according to claim 1 and 2, characterized by the device and also indicates a complete signal safe, that enables tion in the event of a red light signal failure. for the duration of the respective light signal signals, the object is achieved according to the invention there- quence of all light signal transmitters of the light signal system that with each signal change between all must be switched to a yellow flashing light. 35 traffic light transmitters radio signals are exchanged, 4. The method according to claim 1 to 3, characterized in that the switching state of the emitting the light signal indicates that if more than one light signal generator occurs, the signal on the receiver incompatible green light signals all light detectors arriving switching status signals with the The light signal transmitter is switched off. Use the switching status of the associated light signal transmitter. 40 and that in the event of incompatibility the interference 5. The method according to claim 1 to 4, thereby emitting gnal. indicates that the radio signal exchange with digi- Refinements of the invention result from the valley-modulated signals. Subclaims. The following is based on the attached drawing 45 a preferred embodiment of the invention as Example explained. The drawing shows a schematic representation of the The invention relates to a method for controlling the formation of a traffic light system with two identical ner transportable traffic light system with at least Tig trained light signal generators LZG A and LZG two spatially separated traffic lights 50 B. Bern, all with a transmitter and a receiver. Each of the two light signal emitters consists of one are provided and according to a predetermined program traffic light 1 with red, Ä work, and that in the event of a fault in a light indicator yellow and green signal lights. Supplying the transmitter whose transmitter sends an interfering signal to all radio traffic light 1 via a power supply unit or a battery 2, ;,! signal receiver emits, which leads to a shutdown 55 which also the power supply for the programming device 3 or switching of the light signal system leads (DE and the quartz timer 4 supplies. The operation of the AnIa- AS 27 19 675). ge with quartz timers 4 takes place in a per se known A method of controlling traffic lights way. The signal sequence specified in the programmer 3 this type is known (DE-AS 27 19 675), which is next to that clocked as the quartz timer 4 it before- each arranged in a light signal emitter 60 gives. receiver and transmitter has a central control unit, for communication between the light signaling also with a radio transmitter and a radio LZG A and other light signal emitters, for example receiver is equipped. After switching on this way, the light signal generator B serves a transmitter / receiver known traffic light system by means of one from the zen- catcher 5, which is based on a predetermined, approved central control unit emitted radio signal that radiates at a frequency of 65 and preferably also on this the receivers of all light signaling devices can receive frequency. The input from the transmitter / is, the predetermined timing of each light indicator 5 is a digital modulation 6 upstream, started, with the light signaling device so that at a fixed frequency in the following