Electronic brake indication system for at least one vehicle, in particular for at least one rail vehicle

Abstract

Electronic brake indication system for at least one vehicle, in particular for at least one rail vehicle An electronic brake indication system for at least one vehicle is described, the system comprising at least one electromechanical actuator (202) arranged to apply a brake force (F), at least one force sensor means (204) arranged to measure a value of the applied brake force (F), at least one electronic visual signalling device (206) including at least one first electronic light source (208) and at least one second electronic light source (210), and at least one control means (212) arranged to receive the measured value of the brake force (F); a) switching on the first electronic light source (208) when the value of the braking force (F) is less than a first threshold (THRESHOLD1); b) switching on the second electronic light source (210) if the measured value of the braking force (F) is greater than a first threshold (THRESH1);

Description

[Technical field]

[0001] The present invention relates generally to the field of vehicles, for example rail vehicles, and in particular to an electronic brake indication system for at least one vehicle, and to a vehicle equipped with such an electronic brake indication system. [Background technology]

[0002] In the following, the prior art will be described with a focus on the field of rail vehicles, although what is described below may also be applied, where possible, to other fields of vehicles.

[0003] Rail vehicles, whether used to carry passengers or freight, are usually equipped with pneumatic or electro-pneumatic braking systems.

[0004] The braking system includes a brake pipe designed to carry pressurized fluid and an auxiliary tank for storing compressed air.

[0005] Various pneumatic or electro-pneumatic actuators installed along the vehicle are arranged to receive this fluid through respective pipes and convert (and in some cases even modulate) said pressure into a braking force applied to one or more disc pads and / or wheel shoe couplings.

[0006] For several purposes, such as supporting safety and / or monitoring of rail vehicles, vehicles need to be equipped with a system that allows visual confirmation of brake operation, as required by European standards such as EN15220.

[0007] For example, for safety reasons, when the driver commands brake release, it is necessary to ensure that all pneumatic or electro-pneumatic actuators have actually released the brakes. Failure of a pneumatic or electro-pneumatic actuator to release the brakes could result in the wheel associated with that actuator being dragged, resulting in damage to the rail car and infrastructure and the risk of the car derailing.

[0008] To perform such an inspection, known vehicles include a brake indicator mounted on the vehicle so as to be visible from the exterior of the vehicle.

[0009] An example of a prior art brake indicator 100 is shown in FIG.

[0010] In particular, the left side of FIG. 1 illustrates the brake indicator in a brake released state, and the right side of FIG. 1 illustrates the brake indicator in a brake applied state.

[0011] Each brake indicator is associated with one or more pneumatic or electro-pneumatic actuators and comprises a substantially box-like structure 102 .

[0012] Inside the structure 102 there is a plate 104 divided into two colors C1 and C2, for example green and red.

[0013] The box-like structure has an opening 106 through which a portion of the plate 104 can be seen.

[0014] Looking at the left side of FIG. 1, when the braking force is released, i.e. when the pressure of the braking fluid 103 falls below a certain threshold, a certain elastic element 108 associated with the plate 104 holds the plate in a position such that the opening 106 in the box-like structure 102 shows a portion of the plate having the color C1, i.e. green.

[0015] Looking at the right side of FIG. 1, when a braking force is applied, i.e. when the pressure of the braking fluid is greater than a certain threshold, a certain elastic element 108 associated with the plate 104 is compressed and the plate 104 is in a position such that the opening 106 in the box-like structure shows the plate portion having the color C2, i.e. red.

[0016] When the vehicle is, for example, at a station or a marshalling yard, the driver can release the brakes before departure. When a brake release command is given, the operator, who is outside the vehicle, looks at all brake indicators 100 to make sure that the color C1, i.e. green, indicating brake release by the respective pneumatic or electro-pneumatic actuator, is visible from the respective openings 106. If any brake indicator 100 shows the color C2, i.e. red, from the openings 106, the operator is informed that the pneumatic or electro-pneumatic actuator remains blocked in the braking state or, in any case, the presence of an anomaly.

[0017] Today, the rail industry is transitioning from pneumatic / electro-pneumatic braking systems to electromechanical braking systems.

[0018] Disadvantageously, the brake indicator 100 used in pneumatic / electro-pneumatic braking systems cannot be used in electromechanical braking systems, since the operation of the brake indicator 101 in pneumatic or electro-pneumatic braking systems is based on monitoring the pressure value of the brake fluid, which is no longer present in electromechanical braking systems. Summary of the Invention [Problem to be solved by the invention]

[0019] It is therefore an object of the present invention to provide a solution for generating visual information of the brake application status in an electromechanical braking system. [Means for solving the problem]

[0020] These and other objects and advantages are achieved according to one aspect of the present invention by an electronic brake indication system for at least one vehicle, in particular at least one rail vehicle, having the features defined in the respective independent claim 1 or 2, and by a vehicle having the features defined in claim 15. Preferred embodiments of the invention are defined in the dependent claims, the content of which is to be understood as an integral part of this description. [Brief description of the drawings]

[0021] In the following, the functional and structural features of some preferred embodiments of an electronic brake indication system for at least one vehicle, in particular at least one rail vehicle, and of a vehicle according to the invention are described with reference to the attached drawings, in which:

[0022] [Figure 1] 1 shows a brake indicator according to the prior art; [Diagram 2] 1 shows an embodiment of an electronic brake indication system for at least one vehicle, in particular a rail vehicle, according to the invention; [Diagram 3] 1 shows an exemplary illustrative graph of the operation of an electronic brake indication system for at least one vehicle when only a first threshold is present; [Figure 4] 1 is a graph showing an example illustrative operation of an electronic brake indication system for at least one vehicle when a first threshold and a second threshold are present; [Diagram 5] 2 shows a further embodiment of an electronic brake indication system for at least one vehicle, in particular a rail vehicle, according to the invention; [Figure 6] 2 shows a further embodiment of an electronic brake indication system for at least one vehicle, in particular a rail vehicle, according to the invention; [Figure 7] FIG. 1 illustrates an electromechanical actuator according to the prior art. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] (Detailed Description) Before describing several embodiments of the invention in detail, it should be made clear that the invention is not limited in its application to the design details and arrangement of components set forth in the following description or illustrated in the drawings. The invention can contemplate other embodiments and may actually be implemented or configured in different ways. Also, it is to be understood that the phraseology and terminology are for descriptive purposes and should not be construed as limiting. The use of "include" and "comprise" and variations thereof are intended to cover the elements set forth below and their equivalents, as well as additional elements and their equivalents.

[0024] Referring initially to FIG. 2, an embodiment of an electronic brake indication system for at least one vehicle, particularly a rail vehicle, is shown.

[0025] The vehicle is equipped with at least one electromechanical actuator 202 arranged to apply a braking force F to at least one wheel W of the vehicle or to at least one braking element associated with at least one wheel W of the vehicle or an axle to which at least one wheel W of the vehicle is mounted.

[0026] For example, the braking element may be a wheel mounted disc brake when associated with at least one wheel W of the vehicle. For example, the at least one braking element may be an axle mounted disc brake when associated with an axle to which the at least one wheel W is attached.

[0027] For example, the at least one electromechanical actuator 202 for applying a braking force F may comprise a braking force applying means 203, for example a brake shoe, a disc brake caliper or the like.

[0028] The electronic brake indication system comprises at least one force sensor means 204 arranged to measure the value of said braking force F applied by said at least one electromechanical actuator 202 .

[0029] The aforementioned braking force value may be, for example, the instantaneous value of the aforementioned applied braking force F.

[0030] The electronic brake indication system further comprises at least one electronic visual signaling device 206 including at least one first electronic light source 208 and at least one second electronic light source 210 .

[0031] Furthermore, the electronic brake indication system comprises at least one control means 212 arranged to receive a measured value of the braking force F as mentioned above.

[0032] For example, the at least one control means 212 may be or comprise at least one of a microprocessor, a processor, a microcontroller, a controller, a PLC, an FPGA, and the like.

[0033] In a first embodiment, the at least one control means is arranged as follows. a) switching on said first light source 208 if said measured value of said braking force F is smaller than a first threshold value (denoted as Threshold 1 in FIG. 3 ), b) switching on said second light source 210 if the measured value of said braking force F is higher than said first threshold value (THRESHOLD1).

[0034] An exemplary explanatory graph of the operation of the system is shown in Figure 3. The graph in Figure 3 illustrates an electronic brake indication system for at least one vehicle when only a first threshold, ie, Threshold 1, is present.

[0035] If the measured value of the aforementioned braking force F is equal to a first threshold value, the following control strategies can be applied interchangeably: the control means 212 are arranged to switch on the aforementioned first light source 208, or Control means 212 are arranged to switch on said second light source 210 .

[0036] Alternatively, if the measured value of the braking force F is equal to the first threshold value, the control means 212 may be arranged to continue to switch on the light sources 208, 210 which were switched on before the first threshold value "threshold 1" was reached.

[0037] In a second embodiment, similar to the previous embodiment, an electronic brake indication system for at least one vehicle, in particular at least one railway vehicle, comprises at least one force sensor means 204 arranged to measure a value of said braking force F applied by said at least one electromechanical actuator 202, and at least one electronic visual signaling device 206 comprising at least one first electronic light source 208 and at least one second electronic light source 210.

[0038] In contrast to the first embodiment, the at least one control means 212 receives the aforementioned measured value of the braking force F and further a) switching on said first electronic light source 208 when said measured value of the braking force F is less than or equal to a first threshold value (denoted as Threshold 1 in FIG. 4 ); b) providing for switching on said second electronic light source 210 if said measured value of the braking force F is equal to or greater than a second threshold value (shown as threshold 2 in FIG. 4) different from said first threshold value;

[0039] Preferably, when both a first threshold and a second threshold are present, the second threshold may be greater than the aforementioned first threshold.

[0040] 4 shows an exemplary explanatory graph of the operation of the system, illustrating an electronic brake indication system for at least one vehicle, when a first threshold and a second threshold exist. Referring to FIG. 4, a hysteresis value I range can be provided between the first threshold (threshold 1) and the second threshold (threshold 2).

[0041] In the hysteresis band, the light sources 208, 210 that were switched on before entering the hysteresis value range I can remain switched on. In other words, if the measured braking force F is decreasing but has exceeded the second threshold (threshold 2) that led to the switching on of the second electronic light source 210, the at least one control means 212 can keep the second electronic light source 210 switched on until the measured braking force F reaches or falls below the first threshold (threshold 1). Conversely, if the measured braking force F is increasing but has exceeded the first threshold (threshold 1) that led to the switching on of the first electronic light source 208, the at least one control means 212 can keep the first electronic light source 208 switched on until the measured braking force F reaches or falls below the first threshold (threshold 1).

[0042] For all the described embodiments, the at least one control means 212 may preferably be included in at least the electromechanical actuator. In that case, the control means 212 may be a control means normally installed in the electromechanical actuator for controlling its operation. Alternatively, the at least one control means 212 may be a further suitable control means included in the electromechanical actuator.

[0043] If there are multiple electromechanical actuators, each of the multiple electromechanical actuators may comprise a control means. In this case, there may be multiple control means 212 and multiple first electronic light sources 208 and second electronic light sources 210. Each control means is capable of controlling the switching on of at least one first electronic light source 208 and at least one second electronic light source 210.

[0044] Alternatively, and preferably, the at least one control means 212 may be included in or associated with the electronic visual signalling device 206. For example, in this case, one control means may be sufficient even in the case of multiple electromechanical actuators. One control means of the electronic brake indication system may receive multiple braking force F values ​​exerted by multiple electromechanical actuators and control the switching on of all first electronic light sources and all second electronic light sources.

[0045] If there are multiple electromechanical actuators, there may be multiple force sensor means 204. Each of these may be arranged to measure the value of the braking force F applied by the electromechanical actuator.

[0046] Each force sensor means may, for example, comprise a force transducer or a force sensor.

[0047] When multiple first electronic light sources 208 and second electronic light sources 210 are present, they may be located in a single electronic visual signaling device 206 or may be separated into various electronic visual signaling devices.

[0048] Preferably, at least one electronic visual signaling device 206 may be installed on the vehicle so that at least one first electronic light source 208 and at least one second electronic light source 210 are visible from outside the vehicle. In this way, when the vehicle is, for example, at a station, before departure, the driver can release the brakes. When a brake release command is given, an operator located outside the vehicle looks at all first and second electronic light sources 208, 210 and sees that all first electronic light sources 208 are on and all second electronic light sources 210 are off (this state indicates that the brakes have been released by all electromechanical actuators). If the second electronic light source 210 is on, the operator can inform that the electromechanical actuators remain blocked in the brake state, even if a brake release command is given by the driver, or in any case, the presence of an anomaly.

[0049] Preferably, the measured value of the braking force F may be provided by the at least one force sensor means 204 to the at least one control means 212 via a communication channel 214. For example, as can be seen in Fig. 5, the communication channel 214 may be a wireless communication channel.

[0050] In a further embodiment, the communication channel 214 may be a hardwired channel.

[0051] The communication channel 214 may be based on a "black channel" protocol.

[0052] The communication channel 214 may be implemented in accordance with a Safety Integrity Level (SIL) that is higher than a predetermined minimum safety integrity level.

[0053] Preferably, as seen in Fig. 5, the electronic brake indication system for at least one vehicle may comprise a first communication means 502 associated with said at least one force sensor means 204. The first communication means may be arranged to enable transmission and reception of signals on / from said communication channel 214. Furthermore, the electronic brake indication system for at least one vehicle may comprise a second communication means 504 associated with said at least one control means 212 and arranged to enable transmission and reception of signals on / from said communication channel 214.

[0054] For example, the first communication means 502 and the second communication means 504 may each comprise at least one antenna.

[0055] Preferably, the first communication means 502 associated with the aforementioned at least one force sensor means 204 may be arranged to transmit a first signal indicative of the measured value of the braking force F continuously over an extended period of time or according to a predefined transmission period T.

[0056] Preferably, when the vehicle is travelling at a speed below a predetermined speed, the first communication means 502 associated with said at least one force sensor means 204 may be arranged to transmit, via said communication channel 214, a first signal indicative of a value of the braking force F to the second communication means 504 either continuously over an extended period of time or according to a predetermined transmission period T.

[0057] Preferably, the at least one control means 212 is able to transmit, via the second communication means 504, one or more signals indicating the on / off state of the present first electronic light source 208 and second electronic light source 210 to a remote control station or to a user device of an operator. In this way, maintenance required to repair blocked or malfunctioning electromechanical actuators can be more easily planned by staff of the remote station or by an operator with a user device.

[0058] Preferably, the at least one control means 212 may be arranged to switch off said at least one first electronic light source 208 and / or said at least one second electronic light source 210 when the vehicle reaches or exceeds a predetermined speed. Alternatively, the at least one control means 212 may be arranged to prevent the operation of said at least one first electronic light source 208 and / or said at least one second electronic light source 210 when the vehicle reaches or exceeds a predetermined speed.

[0059] In other words, if the vehicle is traveling on the section at a speed above a predefined threshold, the at least one signaling device 206 does not need to provide visual information regarding brake release because there is no operator present to see them. To save energy, the at least one first electronic light source 208 and / or the at least one second electronic light source 210 may be kept off.

[0060] Preferably, as seen in FIG. 6, the at least one visual signaling device 206 may comprise a respective first electronic light source 208, 208', 208'' and a second electronic light source 210, 210', 210'' for each electromechanical actuator 202, 202', 202'' of the vehicle.

[0061] For example, the various electronic light sources may be arranged in a checkerboard, matrix, or vector fashion.

[0062] Preferably, each first electronic light source 208 may comprise at least one LED and / or each second electronic light source 210 may comprise at least one LED.

[0063] In further embodiments, each first electronic light source 208 and / or each second electronic light source 210 may be manufactured according to further technologies, such as, for example, incandescent lamps, neon lamps, and the like.

[0064] Preferably, the at least one electronic visual signal device 206 may comprise a circuit board on which the first electronic light source 208 and / or the second electronic light source 210 may be mounted (and all of the first electronic light sources 208 and / or all of the second electronic light sources, if present, may be mounted on said circuit board).

[0065] Preferably, the at least one electronic visual signaling device 206 may further comprise a logic circuit arranged to implement a predetermined control logic. In one example of a control logic, the vehicle may comprise a plurality of electromechanical actuators 202, for example four electromechanical actuators arranged to apply braking forces F to four different wheels W of the vehicle, or to apply respective braking forces F to four braking elements respectively associated with at least one wheel W of the vehicle or to four axles on which the wheels are mounted. The four wheels, four braking elements or four axles may for example be included in the same bogie of the vehicle.

[0066] For each electromechanical actuator present, the at least one electronic visual signalling device 206 may comprise a respective first electronic light source 208 and a respective second electronic light source 210. In this embodiment, since there are four electromechanical actuators, the at least one electronic visual signalling device may comprise four first electronic light sources and four second electronic light sources. The logic circuitry makes it possible, for example, to switch on all second electronic light sources when the at least one control means commands the switching on of a second electronic light source because an electromechanical actuator (associated with this second electronic light source) has applied a braking force higher than the first threshold "THRESHOLD1" (or, if present, the second threshold "THRESHOLD2"). This control logic makes it possible, for example, to better identify bogies having brake release problems caused by their own electromechanical actuators.

[0067] Obviously, control logic other than that just described may be implemented.

[0068] For example, a logic circuit may include one or more logic gates.

[0069] Alternatively, if the control means 212 is included in the electronic visual signal device 206 it may itself be responsible for implementing the control logic.

[0070] Preferably, the electronic brake indication system may comprise a suitable battery arranged to supply electrical energy to at least one electronic visual signalling device 206, at least one first electronic light source 208 (e.g. each first electronic light source present), and at least one second electronic light source (e.g. each second electronic light source present).

[0071] Alternatively, the at least one electronic visual signaling device, the at least one first electronic light source (e.g., each present first electronic light source), and the at least one second electronic light source (e.g., each present second electronic light source) may be arranged to receive electrical energy directly from the vehicle's battery.

[0072] Examples of possible electromechanical actuators are given below as examples.

[0073] Referring to FIG. 7, an exemplary embodiment of a prior art electromechanical brake actuator 700 is shown.

[0074] The electromechanical actuator may comprise a first electromechanical module 701, which may comprise at least one electric motor and possibly a reducer, i.e. torque multiplier, and may extend or retract an arm 706 connected to an emergency brake module 707.

[0075] The emergency braking module 707 may comprise an emergency braking energy storage means 708, e.g. a potential mechanical energy mechanical storage means. The mechanical means for storing potential mechanical energy is, as a non-exclusive example, a helical spring. The emergency braking module 707 may further comprise an emergency braking energy release means 709, e.g. an electromechanical holding mechanism, controlled by an emergency braking request signal 710. The emergency braking energy release means 709 may be arranged to have a first state for maintaining potential mechanical energy previously stored in the emergency braking energy storage means 708 when the emergency braking request signal 710 does not indicate a request for emergency braking. The emergency braking energy release means 709 is arranged to have a second state for releasing potential mechanical energy previously stored in the emergency braking energy storage means 708 when the emergency braking request signal 710 indicates a request for emergency braking.

[0076] Other forms of mechanical energy storage may be used, such as, by way of non-exclusive example, flat spiral springs, where the force transmission is rotational rather than translational.

[0077] Additionally, the stored energy may be kinetic energy stored in a flywheel kept at proper rotation by a second motor (not shown).

[0078] The force sensor 204 of the electronic brake indication system for at least one vehicle that is the subject of the present invention may for example be limited against an arm 711 (the force sensor is shown in FIG. 7 with reference number 712). The force sensor may generate an electrical signal 713 indicative of the brake force. This signal may be indicative of the mechanical force applied between the arms 711 and 714. The electrical signal 713 may be input to the control unit 702 for the service brakes in addition to being fed to the control means of the electronic brake indication system for at least one vehicle that is the subject of the present invention.

[0079] The arm 714 may be connected between the force sensor means 712 and a backlash recovery device 715 which transmits the force to a last arm 716 which is connected to a pad holder plus brake pad assembly 717 .

[0080] The backlash recovery device 715 is intended to continually recover the wear on the brake pads.

[0081] Pad consumption can also be recovered by software procedures executed by the control unit, but such procedures are not covered by the present invention.

[0082] The service brake control unit 702 is electronic in nature and may receive at its input a power supply voltage 705, including but not limited to that from the vehicle battery.

[0083] The service brake control unit 702 may be arranged to modulate a supply voltage 705 and control an electric motor included in the electric machine module 701 via at least one electric control signal 704 .

[0084] The service brake control unit 702 may be arranged to receive an input signal indicative of a service brake force demand 703 and to apply a service brake force corresponding to the service brake force demand 703, and control the electromechanical module 701 to extend the arm 706 until an electrical signal 713 indicative of the brake force indicates that the brake force corresponding to the service brake force demand 703 has been reached.

[0085] It is understood that the order in which modules 701, 707, 712, 715 are connected may be varied for design and manufacturing convenience.

[0086] The electromechanical actuator 700 described above is provided by way of example only as one type of electromechanical actuator with which the electronic brake indication system for at least one vehicle that is the subject of the present invention may be associated, although the present invention is applicable to virtually any type of electromechanical actuator.

[0087] In the following, a respective brake command method for at least one vehicle will be described by way of example.

[0088] In a first example, the method comprises the steps of: - measuring a value of a braking force F applied by at least one electromechanical actuator of the vehicle 202 to at least one wheel W of the vehicle or to at least one braking element associated with at least one wheel W of the vehicle or to an axle to which at least one wheel W is attached; - switching on a first electronic light source 208, such as an electronic visual signalling device 206, if said measured value of the braking force F is smaller than a first threshold value (THRESHOLD1); switching on a second electronic light source 210, such as an electronic visual signaling device 206, if the measured value of the braking force F is greater than the aforementioned first threshold value (THRESHOLD1).

[0089] In a second example, the method comprises the steps of: - measuring a value of a braking force F applied by at least one electromechanical actuator of the vehicle 202 to at least one wheel W of the vehicle or to at least one braking element associated with at least one wheel W of the vehicle or to an axle to which at least one wheel W is attached; - switching on a first electronic light source 208, such as an electronic visual signalling device 206, when said measured value of the braking force F is less than or equal to a first threshold value (THRESHOLD1); switching on a second electronic light source 210, such as an electronic visual signaling device 206, when the aforementioned measured value of the braking force F is equal to or greater than a second threshold value (THRESHOLD 2) different from the aforementioned first threshold value (THRESHOLD 1). The above mentioned methods may be implemented by at least one control means or computer.

[0090] Where possible, the embodiments described above for the electronic brake indication system for at least one vehicle are also applicable to the method described above by way of example.

[0091] In yet a further aspect, the present invention relates to a vehicle.

[0092] The vehicle comprises at least one electromechanical actuator 202 arranged to apply a braking force F to at least one wheel W of the vehicle or to at least one braking element associated with at least one wheel W of the vehicle or with an axle to which at least one wheel W of the vehicle is mounted. The vehicle further comprises an electronic brake indication system according to any one of the embodiments described above.

[0093] The invention applies to at least one vehicle, and may therefore also apply to a plurality of vehicles, for example a plurality of vehicles coupled together to form a convoy, for example a railcar convoy.

[0094] As mentioned above, the present invention is particularly applicable in the field of rail vehicles / trains that run on railroad tracks. For example, the vehicles referred to herein may be locomotives or wagons, and the track / section may include rails on which the wheels of the locomotive roll. The embodiments described herein are not intended to be limited to vehicles on railroad tracks. For example, the vehicles may be automobiles, trucks (e.g., semi-trailer trucks on highways, mining trucks, trucks for hauling timber, etc.), and the track may be a road or trail. For example, a train may comprise a number of such vehicles coupled or associated with each other.

[0095] Various aspects and embodiments of an electronic brake indication system for at least one vehicle, in particular at least one rail vehicle, and a vehicle according to the invention have been described. It is understood that each embodiment can be combined with any other embodiment. Furthermore, the invention is not limited to the described embodiments, but various modifications are possible within the scope defined by the appended claims.

Claims

1. An electronic brake indicator system for at least one vehicle, in particular for at least one railway vehicle, The vehicle comprises at least one electromechanical actuator (202) prepared to apply a braking force (F) to at least one wheel (W) of the vehicle, or to at least one brake element associated with at least one wheel (W) of the vehicle or an axle to which at least one wheel (W) is attached, The aforementioned electronic brake indicator system At least one force sensor means (204) prepared to measure the value of the braking force (F) applied by the at least one electromechanical actuator (202), An electronic visual signaling device (206) comprising at least one first electron light source (208) and at least one second electron light source (210), At least one control means (212) prepared to receive the measured value of the braking force (F), Equipped with, a) When the measured value of the braking force (F) is less than or equal to the first threshold (threshold 1), the switch of the first electron light source (208) is turned on. b) If the measured value of the braking force (F) is greater than or equal to a second threshold (threshold 2) which is different from the first threshold (threshold 1), the switch of the second electron light source (210) is turned on. Electronic brake indicator system.

2. The electronic brake indicator system according to claim 1, wherein the second threshold (threshold 2) is greater than the first threshold (threshold 1).

3. The electronic brake indicator system according to claim 1, wherein the at least one electronic visual signaling device (206) is prepared to be installed on the outside of the vehicle such that the at least one first electronic light source (208) and the at least one second electronic light source (210) are visible from outside the vehicle.

4. The electronic brake display system according to claim 1, wherein the measured value of the brake force (F) is provided to the at least one control means (212) via a communication channel (214) by the at least one force sensor means (204).

5. The electronic brake indicator system according to claim 4, wherein the communication channel is a wireless communication channel.

6. A first communication means (502) is provided in connection with the at least one force sensor means (204) and is prepared to enable the transmission / reception of signals in and from the communication channel (214), A second communication means (504) is provided in connection with the at least one control means (212) and is prepared to enable the transmission / reception of signals in and from the communication channel (214), Equipped with, The electronic brake indicator system according to claim 4.

7. The electronic brake indicator system according to claim 6, wherein the first communication means (502) associated with the at least one force sensor means (204) is configured to transmit a first signal indicating the value of the measured brake force (F) continuously over a long period of time or according to a predetermined transmission cycle.

8. The electronic brake indicator system according to claim 6, wherein the first communication means (502) associated with the at least one force sensor means (204) is configured to transmit a first signal indicating the value of the brake force (F) to the second communication means (504) via the communication channel (214) continuously over a long period of time or according to a predetermined transmission cycle when the vehicle is traveling at or below a predetermined speed.

9. The at least one control means (212) is configured to switch off the at least one first electron light source (208) and / or the at least one second electron light source (210) when the vehicle reaches or exceeds a predetermined speed, The at least one control means (212) is configured to prevent the operation of the at least one first electron light source (208) and / or the at least one second electron light source (210) when the vehicle reaches or exceeds a predetermined speed. The electronic brake indicator system according to claim 1.

10. The electronic brake indicator system according to claim 1, wherein the at least one visual signaling device (206) comprises a first electron light source (208') and a second electron light source (210') for each of the electromechanical actuators (202') of the vehicle.

11. The electronic brake indicator system according to claim 1, wherein the at least one first electron light source (208) comprises at least one LED, and / or the at least one second electron light source (210) comprises at least one LED.

12. The at least one electronic visual signaling device (206) comprises a circuit board, The at least one first electron light source (208) and / or the at least one second electron light source (210) are mounted on the circuit board. The electronic brake indicator system according to claim 1.

13. The device comprises the at least one electronic visual signaling device, the at least one first electron light source, and a battery prepared to supply electrical energy to the at least one second electron light source. or The electronic visual signaling device, the at least one first electron light source, and the at least one second electron light source are prepared to receive electrical energy from the vehicle's battery. The electronic brake indicator system according to claim 1.

14. It is a vehicle, At least one electromechanical actuator (202) prepared to apply a braking force (F) to at least one wheel (W) of the vehicle, or to at least one brake element associated with at least one wheel (W) of the vehicle or an axle to which at least one wheel (W) is attached, The electronic brake indicator system according to claim 1, A vehicle equipped with the following features.

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