BG109785A - Led signal lamps and method for reliable control of led signal lamps - Google Patents

Abstract

The intelligent LED signal lamp for open-air signaling in a railway signaling equipment with LED diodes (4) is divided into three independent LED sections (9), the light from two only of the LED sections (9) being sufficient to satisfy the respective standards concerning the optical characteristics of such lamps. The functionality of each LED diode (4) is checked in three independent ways. The functionality is checked of the electronics for management and control of each section (9) of the LED signal lamp, as well as the functionality of the power supply source (11), so as to detect all troubles and avoid any malfunction of the LED signal lamp, the basic safety principles being observed concerning the permissive signal and the warning signal.

Description

LED signal lamps and method for reliable control of LED lamps

Technical area

The invention relates to LED signaling lamps for outdoor signaling in railway signaling technology, intended in particular for railway safety equipment. crossings and / or stations and signaling equipment of lines, the LEDs being divided into sections including control and control and power supply, which is electrical power supply.

In addition, the invention includes a method for reliable LED control

signal lamps, during which the functionality of the LED is monitored and the functionality of the electronics is controlled to control and control each section of the LED signal lamp.

Prerequisites for the invention

At present, outdoor signaling lamps used in Ceske drahy (Czech Railways) are in the vast majority of incandescent lamps. Incandescent lamps are unsuitable for use in security equipment because of their too low reliability due to their actual construction and the principle of light. There are two ways of eliminating this feature and reliable rail work:

Use of double-ended bulbs in railway safety equipment crossings, ie in the warning boards. When the main bulb is burned, the spare is automatically switched on.

IN other areas of the railway outdoor signaling technology, ie for signals, in the case of burning the sole wire of the bulb is used

the principle of illuminating the signal for a lower switching level.

The relatively high energy consumption of incandescent lamps is another important consideration when using these light sources.

The control and all logic for controlling the incandescent lamps are located mainly outside the premises of the signal and warning panels.

Appropriate electronics are created through relay circuits for older types of equipment, or through a combination of processor systems including contact or

contactless interface for newer types. When verifying that the light is on, the light bulb monitoring principle is used. The warning panels also use optical sensors located in the lamps, the output of which gives information about the light of the bulbs. The relay or processor logic checks the operation of the lamps on the basis of this output information and, when the lamp wires are burned, switches the backup wire on the respective warning light bulb or lights the low-pass signal.

The electric power supply of the incandescent signal lamps © is provided by 230V / 50Hz AC, due to the minimum loss of current for long distance propagation. This current is then transformed into the supply voltage 12V / 20W of the signal lamps by means of a transformer located at or near the semaphore.

The nominal power supply of incandescent lamps in the warning boards is provided by the logic of the supply voltage - relay or processor, which controls the warning panels. This power supply is DC, 24V. The dual-wire bulbs on the warning panels are 2x 12V, 20W.

As a result of the aforementioned reasons, the first lamps with integrated LEDs began to appear in Ceske drahy. So far, this is only observed in speed indicators that represent a number (symbol) or line (symbol). The on / off switching of the light is controlled by switching the power on or off. Its control is carried out by a single current relay, the exclusion of which indicates the presence of insufficient current - unsatisfactory condition of the lamp during its illumination. The principle connection of LEDs u in the design of this lamp is the classic series-parallel connection with direct mutual influence. individual LEDs.

After the foreign companies that produce LED lamps for the railway. signaling equipment are "Alstom", "Ansaldo", "Safetran", "Westinghouse", "Percept" and others.

In addition, these lamps typically use a combination of sequential parallel coupling of the individual LEDs, split by some manufacturers into two parallel sections with independent power and control. To ensure maximum compatibility with incandescent lamps, they are controlled by turning on the power when the lamp is on and turning off the power when the lamp is off. The supply voltage of these foreign lamps varies from manufacturer to manufacturer, and depending on the type of lamp, the supply current may be constant or variable. The supply voltage of these foreign LED lamps, and therefore the control itself, is usually two-wire, with no duplicate option.

The control of the lighting of LED lamps in the products of these foreign companies is usually resolved by checking the total current consumed by the low sensitivity lamp, which results in a malfunction of a larger number of LEDs. The reliability of the LEDs themselves is of particular importance here. By connecting two parallel sections of LEDs powered by two independent sources, each of these sources is naturally malfunctioned.

A common feature of the above-mentioned control and control systems for LED lamps is undoubtedly their higher reliability compared to incandescent lamps, based on the common and physically determined fact that a light bulb is far less reliable than a larger number of LEDs, in this case approx

200 diodes included in one lamp. The required increase in reliability, performance, compared to incandescent lamps, is not observed.

The system is simply a 1 in 1 ("lool") system with limited ability to monitor the LED's current through power consumption. Moreover, here in the logic of decision, access and diagnostics, located in the remote object, only the principle of control by switching on the contact or contactless control of remote ignition of lights is used. This requires a large amount of cables, which seriously affects the overall value of the signaling equipment.

For example, in patent application EP 132 4641, the applicant - Westinghouse In rake &

p

Signal Holdings Ltd., UK, has solved the task of electrical configuration and current monitoring in the LED lamp of the signaling device. The signal lamp (semaphore), intended principally for the direct replacement of an incandescent lamp in the signal light, in terms of power and control, shall consist of at least two separate LEDs, with their own control circuits connected in parallel. In parallel to the power supply of the lamp, an automatic ballast resistor, sized so that the current passing through these LED fields, causes the LED lamp to draw power, such as a filament lamp. Checking the functionality of the current relay lamp is the same as for a filament lamp. The automatic circuit of the ballast resistor always includes a pair of optocouplers for one LED field. The inconsistent action of the LED fields, i. when one or more LED fields are off, it is rated by the independent relay as an "unsettled alarm". The verification in the scheme is not performed under the “safe malfunction” scheme. So the main role here falls to the observer, for example the engineer, who checks the randomly illuminated LED field.

For this reason, the individual LED fields must be positioned in the lamp in such a way that when any of them is damaged, it can be seen with the naked eye.

Valuable in this solution is the ability to simply replace an existing incandescent lamp with an LED signal lamp without the need for a redesign of the signal lamp control and control circuit. The principle of this solution is based on the same consumption of the LED signal lamp and the incandescent lamp, i. no energy is saved. Another disadvantage characteristic of this invention is that the control scheme used in it is less reliable than the scheme used for

check the glow of the incandescent lamps. A third disadvantage is the reliability based on the human factor, because the control circuit used to check the illumination of the LED signal lamp is not of the type "safe malfunction", ie. circuit with own safety. Detection of an unlit field by the LED light is done by the engineer only through visual observation. In the case of a faulty LED field, the optical parameters prescribed on the signal lamp are obviously not fulfilled.

The Czech unit model No. 14 134 of the owner of Betamont s.r.o., Czech Republic describes the connection of the electronic control circuit in the warning boards of the railway system. crossings that solve the task of powering and checking lights in warning panels consisting of a matrix of illuminated LEDs. The matrix of illuminated LEDs is divided into two independent consecutive branches, each of which is connected to an independent power source. The verification of the LEDs' illumination is performed by monitoring the current flowing through the successive branch of the LEDs by a reliable measuring circuit. The current in each branch is monitored individually. Checking the luminous current is supplemented by

Checking the voltage between the two LEDs by another measurement circuit. The current and voltage checks of the two LEDs and the voltage check are jointly performed in a reliable intersection circuit whose output static signal is intended to activate the resultant safety relay of the first safety relay. An output static signal is only generated when all input signals are triggered by the output signals of the reliable measurement circuits, ie. by checking the LED current in both branches and checking the voltage.

In addition, this solution makes it possible to replace the incandescent bulb with an LED bulb without making any changes to the controls.

With warning panel diagrams, except for minimal changes to the control scheme, which checks that the warning lamps are illuminated.

The downside of this solution is the low alert threshold. The first failed LED lamp is already a malfunction. Another drawback is the static output control signal at a time when both warning lamps are on, resulting in low information reliability. This solution applies only to the warning lamps, the supply voltage being only 12V and the permissible voltage range not defined.

Japanese Patent No. 2000172986 to Owner Nippon Signal Co. Ltd., Japan, describes the solution of a fault detector in signal lamps that can detect faults, ie. disconnection of LEDs and dimming of their lamps as a result of aging. LED signaling lamps are connected in series. Each consecutive branch has an LED to monitor the light intensity of the signal. This tracking LED is from the same production series as the signal LED. The following LED is located on the same base as the signal LEDs. The luminous intensity of the following LED is scanned, generally in the form of an optocoupler, from the verification circuit. Assuming that due to their uniform production technology, all LEDs age the same and that their luminous intensity decreases over time in the same way, the luminous intensity of the signal LEDs is determined or estimated, and thus the maximum value of their luminous diodes is determined. intensity. If any of the group LEDs fails, the follow-up LED goes out and the test circuit registers it. The outputs from the verification circuits of all branches with groups of LEDs are collected in a single signal box, the output of which is fed to the signal relay.

This applies only to the control of the supply current of several branches of LEDs, which determines whether current is flowing or not. The decrease in the intensity of the LED lamp as a result of its aging is also estimated. The proposed scheme does not address the issue of short-circuiting the diode (s) from the branch of each group and does not increase the lamp availability. However, the scheme for controlling the glow of the lamp diodes is not resolved on the principle of safe malfunction.

Brief description of the invention

The aforementioned disadvantages have been eliminated or substantially reduced by the intelligent LED signal lamp proposed in the present invention, the essence of which is that the LED signal lamp is divided into three independent and electrically independent sections of LEDs, leaving even the weak light from only two sections is sufficient to meet the relevant standards regarding the optical characteristics of the lamps, whilst maintaining the reliability of passing signals and warning signals. Each of the three LED sections has an independent wiring diagram, each LED section contains three

independent control, each independent control output is output to the control circuit of another LED section and each control circuit is provided with an element to disconnect the power supply of adjacent LED sections.

The main advantage of this invention is that this intelligent LED signal lamp operates on the principle of the system "2O3, ie. two out of three.

According to the present invention, the advantages of this smart LED beacon are that:

- it increases the readiness of the external light signal in the railway.

transport (As = 0.999999), both with respect to road and motorway users in the blocking (security) equipment of railway. crossings and in relation to the railway. transport at railway stations, lines and security equipment climbs;

- it enhances the functional reliability of light signals and warning panels;

- it limits the cost of fully wiring security equipment;

it limits the cost of maintaining light signals and warning panels;

it enables the inclusion of modern control systems for security equipment;

- it assumes and resolves reliably the function of controlling, checking and controlling the illumination of each individual lamp from the higher systems.

The advantage is that at least one current control that allows the LEDs to be checked in the easiest way is an independent control. Voltage control or optical control can also be independent control.

At least one LED control and monitoring circuit, which represents the optimal connection of the other control and control functions in the control of LEDs in a single circuit, may be independent control.

Independent control can also be created by two LED current controls and a single circuit for controlling and monitoring the LED function, which is a suitable configuration for the LED track lights. transport.

It is advisable to have a control processor that integrates the control and evaluation functions of all control elements into one control circuit. The control circuit s may also consist of discrete semiconductor circuits or relay circuits.

In one particular successful configuration, tested for a long time, the output from the independent current control is output to the control processor of the first adjacent LED section, the output from the second independent current control is output to the second adjacent LED section, and the control and monitoring circuitry of the LED function performs independent verification and independent evaluation of the status of all LEDs in the lamp.

The LED power cut-off unit is the power cut-off element of the LED sections. This interrupting element does not allow confusing signal lights to be displayed, which can lead to a hazardous road situation, for example spontaneous illumination of a multi-direction switch signal.

Each of the three sections is provided with two-way data communication with the higher system (upper configuration), which is used for command transmission and diagnostic information.

Duplicate physical communication of data with parallel active state, 0 increasing the readiness of LEDs, is an advantage.

Each LED section has a control circuit, provided with a two-way lateral connection, through which the control circuits of the other two LED sections are connected.

The power source is connected to two power systems, which ensures the stability of the LED signal lamps. That is, the LED signal lamp is adapted to be powered by two independent external power systems, which increases the reliability of the equipment.

According to the present invention, the principle of the reliable control method ί *?

of this smart LED signal lamp consists in the control of the LEDs, divided into three separate electrically independent sections, continuously and simultaneously, by three independent controls, and at the same time by the continuous checking of the functionality of the control and controlling electronics of each section of the LED the signal lamp. These checks identify any faults that have occurred in any of the circuits (including, the LED tell-tale control circuit, the LED tell-tale control circuit, the power circuit and the LED circuit). The malfunction is then reported to the higher indication system. The LED signal lamp fully retains its functionality in accordance with the relevant standards, complying with the safety principles of the switch signal and the warning signal.

According to the invention, the main advantage of this method is that the low light of only two sections is sufficient to satisfy the relevant norms with respect to the optical characteristics of the LED tell-tale, so that an accidental malfunction does not lead to a loss of functionality of the entire LED warning light. The separation of LEDs into three electrically independent sections ensures

the mutual independence of the sections. Continuous and simultaneous inspection of the LED is a guarantee for the safe monitoring of the LED signal lamp. A malfunction found in one of the sections is reported to the higher system where it is identified and evaluated. It is essential that a fault in one section of the LEDs does not cause the entire lamp to malfunction.

In order to maintain the independence of the operation information of each LED, it is desirable that the operation of the LEDs in each section be controlled and controlled by an independent control circuit based on the higher system information and diagnostic information from that section from both adjacent sections.

For the consistent and guaranteed safe operation of the LED, it is desirable that the control circuit receive arbitrary information on the operation of the LEDs from each of the three sections from three independent sources, namely: the control circuit and the monitoring of the LED from the respective section, from the two-way a lateral connection to the control circuit of each of the other two sections, and a two-way lateral connection to the control circuit of the third remaining section. Each control circuit of each arbitrary section receives information transmitted from the bidirectional lateral link for the operation of the LEDs in the other two sections of the current control in those adjacent sections. The performance of each LED is evaluated independently of all three control circuits, the results being exchanged through a two-way lateral connection.

Regardless of the information from the higher system, in case of failure of one of the sections of the LED signal lamp of the switch signal, and even if there is a discrepancy in the information from the control circuits of the other two sections, these control circuits interrupt the supply of LEDs from the section with a malfunction. This makes it possible to turn off the power of each section with LEDs from the control circuit of an adjacent section without the logical coordination of the other sections so that no unwanted illumination of even one section of the LED of the switch signal is obtained.

Notwithstanding the information from the higher system, in the event of failure of one section of the LED warning lamp, after reconciling the information from the control circuits of the other two sections, these control circuits interrupt the supply of the LEDs from the defective section. In the event of an undesired light on one section of the LED warning light, the LEDs will be switched off from the warning light.

section after logical coordination of the control schemes of the other sections. The possibility of switching off even one section of LEDs as a result of a fault in a control circuit is excluded.

The control circuit communicates with the higher system bidirectionally, mainly through reliable data communication, which is physically duplicated with a parallel active state. This ensures that the necessary signals are transmitted, even when one of the communication lines fails.

Each section of the LED beacon is powered separately to maintain the 2o3 system, i.e. system two out of three.

The power source creates three separate power circuits for the LED signal section sections of two input power systems, with the failure of each of the two input power systems causing only one of the three independent power circuits of the LED lamp sections to malfunction, which is the optimal solution for the choice of the system.

Brief description of the drawings

The following is a detailed exemplary description of the invention, explained by means of schematic diagrams of which:

Figure 1 shows the block diagram of one section of the LED signal lamp, a

Figure 2 shows the block diagram of the LED signal lamp.

Detailed description of preferred embodiments of the invention

In FIG. 1 is a schematic block diagram of one of the three sections 9 of the smart LED signal lamp, with power supply 1 of the LEDs 4, and with two sequentially configured current controls 3 in the LEDs. The output signals 2 of the current controls 3 are transmitted to the adjacent LED section 9 (Fig. 2). The control of the LEDs 4 of the LED section 9 is provided by the control and control circuit 5 which communicates with the control processor 7. Based on the lateral (transverse) communication 6 and the output signals 2 of the current controls 3 in the LEDs, the control circuit , by means of the control processor 7, triggers an interruption from the power supply unit 13 of the adjacent LED section 9.

The operation of the entire LED section 9 is controlled by bidirectional communication 8 with the higher system.

In FIG. 2 shows the connection of the three sections 9. The sections 9 are connected through the two lateral communications 6 and also through the output 2 of the controls 3 of the LEDs, and further by controlling the interruption from the power supply unit 13 of the LEDs. The power circuits 12 of the LED sections 9 are created in the power supply 11 of the two independent power systems 10.

All LEDs 4 of one LED signal lamp are divided into three independent sections 9 by LEDs and are arranged in such a way that the light

only two of these three sections 9 of the LEDs ensure that all requirements that meet the requirements for the optical characteristics of the lamp are fulfilled. LEDs 4 are controlled by circuits 5 for control and control of LEDs, actuating mutually independent power supply 1 of sections 9 of LEDs

4. Thus, no malfunction, ie interruption or short circuit of any LED 4 does not in any way affect the illumination of the remaining LEDs

4, as well as their optical and reliability parameters. In addition, these LED control circuits 5 make it possible to monitor their operation. Any malfunction of a connected LED 4, i. interruption and even short ©

connection is established, and this information is transmitted to the control processor 7.

Each LED section 9 has its own independent control processor 7. The independent control processor 7 processes command information coming from the higher system, for example, "turn on the light", "turn on the light", "turn off the light", etc. At the same time, the independent control processor 7 further processes information from the circuits 5 to control and control the LEDs of "its" section 9. At the same time, the independent control processor 7 processes the information from lateral communication 6 between the three control processors 7, as well as the information from the output 2 of the current controls 3 in the LEDs of the two adjacent sections 9 of the LEDs. LED current controls 3 scan the total current consumed by the corresponding section 9 of the LEDs. The processing of all this information leads to a clear and definite determination of the information on the operation and immediate state of each individual LED 4, of each separate control and monitoring circuit 5 and of each control processor 7.

Each control processor 7 has the ability to interrupt power permanently

of the LEDs 4 of the adjacent sections 9 by interruption from the power supply unit 13 of the

LEDs 4 in the light of the switch signal, independently of the other control processors 7, so that the corresponding section 9 of the LED of the switch signal does not illuminate at the moment when it should be switched off due to a malfunction of the piece of equipment for decision-making or access, including control processors 7 and circuits 5 for controlling and monitoring the operation of LEDs.

The two control processors 7 are triggered only after their coordination (i.e.

after logical matching), permanently interrupt the power supply of the LEDs 4 of the third section 9 from the warning light by interrupting the power supply of the LEDs 4 from the unit 13 so that no more than one section 9 of the LED light is switched off. the warning signal due to a malfunction of part of the decision-making or access equipment, including the control processors 7 and the circuits 5 for controlling and monitoring the operation of the LEDs.

The power supply of the individual LED sections 9, including the control and monitoring electronics, is decided separately, ie. the output from the power source unit 11 are three independent power supply circuits 12 of the LED sections 9. The two input voltages of the power supply systems 10, i. different or unified power systems incorporating any combination of alternating current and / or DC elements, as needed, are converted, within power supply E, into the three input power circuits 12 of the LED sections 9 in such a way that the malfunction of the input voltage of any of the power systems 10 causes only 1/3 of the input power circuits 12 of the LED sections 9 to malfunction, thus complying with all requirements regarding the optical performance standards of a given lamp. The operation of the individual required power supply circuits 11 is continuously checked by the control processors 7 of the individual LED sections 9.

Command information coming from communication 8 with the higher system (e.g., "turn on the light," turn on the light "," turn off the light ", etc.) and at the same time diagnostic information sent to the higher system through communication 8 (e.g. , the light is on, the light is off, the fault-free state, "malfunction" and its type, etc.) is transmitted exclusively through data communication 8. This communication 8 is physically duplicated by two independent connections that are active simultaneously. .

The specific example configuration is one of many possible. Many other configurations are possible within the scope of the claims.

Industrial applicability

Red and white LED warning lights for warning signs in railway safety equipment crossings.

Red, yellow, green, blue and white LED warning lights for the main signals (i.e., entry, departure, on-the-road, block section and safety signals), basic warning signals, basic repeating warning signals, maneuver signals, repetitive maneuver signals, distribution hump signals, recurring hump signals, and barrier signals for station and line signaling equipment.

List of symbols used:

power supply (1) of LEDs 4 output (2) of current control (3) of LED control (3) of LED current

LEDs (4) circuits (5) for control and control of the functions of the LED lateral communication control processor communication (8) with the higher system section (9) of the LED power supply systems (10) of the power supply 11 power supply (12) of LED section 9 unit (13) for interruption of power supply of adjacent LED section (9)

Claims (19)

Patent Claims 1. Outdoor Indicator Lamp for Railway Indicator Lights signaling technology specially designed for interlocking railway equipment. crossings and / or for signaling equipment at stations and on a line in which the LEDs (4) are divided into sections (9) comprising control and control and power supply circuits (11) in the form of electrical power, that: - it is divided into three independent and electrically independent sections (9) of LEDs (4), whereby the illumination of even only two sections (9) of the LED is sufficient to fulfill the required characteristics of the LED lamp while maintaining safety the switch signal and the warning signal; - each of the three LED sections (9) has an independent circuit (12); - each LED section (9) contains three independent controls; - each output of the independent controls is fed to a different control section of the LED section; and - each LED section (9) is provided with a power cut-off element (1) of each of the adjacent sections. 2. According to claim 1, the LED signal lamp is characterized in that: at least one control (3) of the current in the LED is independent control. 3. According to claim 1, the LED signal lamp is characterized in that: at least one LED control and monitoring circuit (5) is independent control. 4. According to claim 1, the LED signal lamp is characterized in that: the control circuit is a control processor (7) 5. According to claim 1, the LED signal lamp is characterized in that: the interruption of the power supply (1) is a unit (13) for interrupting the supply of LED for each of the adjacent LED sections (9), controlled by the control circuits of both adjacent LED sections (9). 6. According to claim 1, the LED signal lamp is characterized in that: each LED section (9) has its own control circuit provided with two-way data communication (8) with the higher system. 7. According to claim 6, the LED signal lamp is characterized in that: the data communication (8) is physically duplicated with a parallel active state. 8. According to claim 1, the LED signal lamp is characterized in that: each section (9) of the LED has a control circuit provided with two-way lateral communication (6) allowing connection to the control circuits of the other two LED sections (9). 9. According to claim 1, the LED signal lamp is characterized in that: the power supply (11) of the wiring diagram is connected to two power systems (S). 10. According to claim 2 or 3, the LED signal lamp is characterized in that: three independent controls were created: - both controls (3) are fed into the EEE, and - from a single circuit (5) for controlling and controlling the functions of the LED. 11. According to claim 10, the LED signal lamp is characterized in that: - one of the independent current controls (3) in the LED has its own output (2) which is fed to the control circuit of one of the adjacent LED sections (9); - the output (2) of the remaining independent current control (3) is connected to the control circuit of the other second adjacent LED section (9); an LED control and monitoring circuit (5) for generating LED control (4) from the actual LED section (9) is connected to the control circuit of the actual LED section (9); and - the two outputs (2) of the current controls of the other two LED sections (9) are connected to this control circuit. 12. According to claim 1, the LED signal lamp is characterized in that: the power supply interrupting element (1) of the LEDs (4) is a unit (13) for interrupting the power supply of the LEDs. 13. The method of reliable control of the LED signal lamp according to claims 1 to 12, during which the functionality of the LEDs (4) is checked and the functionality of the electronics for controlling and controlling each section of the LED lamp is characterized by that: the functionality of the LED signal lamp is checked - by checking each circuit of the LEDs (4) continuously and simultaneously by three independent controls; and - simultaneously by continuously checking the functionality of the control and control electronics of each section; - simultaneously by continuously checking the functionality of the electronics for the control and control of each section (9) of the LED signal lamp; - during these checks, any malfunction that has occurred in any of the circuits, including the LED indicator lamp control circuit, the LED warning lamp control circuit, the power supply circuit (I) and the LED circuit (4) ; - the malfunction is then transmitted to the higher indication system; in the meantime, the LED lamp fully retains its functionality in accordance with the relevant standards, complying with the safety principles of the switch signal and the warning signal. 14. The method of claim 13, wherein: the function of the LEDs (4) in each section (9) is controlled and controlled by a separate control circuit based on the information from the higher system and the diagnostic information from that section (9) from both other sections (9). 15. The method of claim 14, wherein: the control circuit receives arbitrarily information on the operation of each LED (4) from each section (9) of the three sections (9) from three independent sources, namely: - from circuit (5) for controlling and monitoring the function of the LEDs of this section (9); from bidirectional lateral communication (6) to the control circuit of any section (9) of the other two LED sections (9); - from bidirectional lateral communication (6) to the control circuit of the remaining last third LED section (9); - as each control circuit of each section (9) receives information transmitted by bidirectional lateral communication (6) for the operation of the LEDs (4) from the other two LED sections (9) by the current monitors (3) of these adjacent sections ( 9). 16. The method of claim 13, wherein: irrespective of information from the higher system, in the event of a section (9) malfunctioning of the passing signal LED, or even in the absence of coordination of the control circuit information of the other two sections (9), these control circuits interrupt the power supply (1) of the LEDs (4) for the defective section (9). 17. The method of claim 13, wherein: irrespective of the information from the higher system, in the event of one section (9) failure of the warning signal LED, once the information from the control circuits of the other two sections (9) has been reconciled, these control circuits interrupt the power supply (1) of the section (9) of the LEDs (4) with the fault detected. 18. The method of claim 13, wherein: The control circuit communicates with the higher system in a bidirectional manner exclusively through reliable bidirectional data communication (8), which is preferentially physically duplicated with a parallel active state. 19. The method of claim 13, wherein: the power source (11) with electrical current generates three separate power circuits (12) of the sections (9) of the LED signal lamp of the two input power systems (10), causing a malfunction of one of the two input power systems (10) causing a malfunction only on one of the three independent power circuits (12) of the sections (9) of the LED signal lamp, so that the LED signal lamp remains fully functional.