Abstract:
The invention is directed at a modular lighting, detection and control system ( 1 ) for an industrial construction or a vehicle service construction comprising an assembly of one or more suspension rails ( 3 ) and one or more system modules ( 7 ), wherein the suspension rails ( 3 ) are arranged for receiving the system modules ( 7 ), and the system modules ( 7 ) are arranged for mounting thereof on the suspension rails ( 3 ) for suspending therefrom, and wherein the system is arranged conveying electric signals to and/or from the modules ( 7 ) via the suspension rails ( 3 ), said electric signals including a power signal for powering the system modules ( 7 ), wherein the system further comprises a low voltage power supply unit for providing the power signal, the power signal being a low voltage electrical power signal, and wherein for conveying the electric signals the suspension rails ( 3 ) comprise one or more conductor sections ( 12,13,14,15 ), wherein the conductor sections ( 12,13,14,15 ) are formed of a conductive material substantially comprising aluminum.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention is directed at a modular lighting, detection and control system for a vehicle service construction comprising an assembly of one or more suspension rails and one or more system modules, wherein the suspension rails are arranged for receiving the system modules, and the system modules are arranged for mounting thereof on the suspension rails for suspending therefrom. The invention is further directed at a suspension rail and at a system module for use in such a modular lighting, detection and control system. 
       BACKGROUND 
       [0002]    In industrial service constructions, e.g. vehicle service constructions such as parking garage buildings, lighting, detection and control systems are typically applied such as to facilitate building services. These services, for a parking garage, for example include lighting, signaling, free parking space detection, and the like. For an industrial building, such as a large storage facility or distribution center, the construction is to be equipped mainly with lighting, and additionally often with different kinds of building services. Requirements for such systems include robustness and efficient space and power usage, sometimes combined with versatility. The required services may be implemented as system modules, which are preferably part of a single lighting, detection and control system. 
         [0003]    Advantageously, the system modules of such a lighting, detection and control system are operated at low voltage levels (e.g. below 75V DC or 50V AC) at which levels the safety regulations are more lenient. Lighting under these conditions (e.g. &lt;75V DC) may be provided for example with light emitting diode (LED) based armatures. LED&#39;s provide a robust low maintenance lighting solution. 
         [0004]    To guarantee sufficient power everywhere in the system, the system may use high voltage levels requiring secure cabling. Alternatively or in addition, multiple power supplies reduce the distances between the supply and the powered modules. This causes such systems often to be bulky such as to give room to large amounts of cabling. As a result, the systems are heavy, take large amounts of space, and are difficult to install. 
       SUMMARY OF THE INVENTION 
       [0005]    It is an object of the present invention to provide a modular lighting, detection and control system for an industrial construction or a vehicle service construction, which is safe, easy to install, and compact to allow efficient space usage. 
         [0006]    To this end, there is provided herewith a modular lighting, detection and control system for an industrial construction or a vehicle service construction comprising an assembly of one or more suspension rails and one or more system modules, wherein the suspension rails are arranged for receiving the system modules, and the system modules are arranged for mounting thereof on the suspension rails for suspending therefrom, and wherein the system is arranged conveying electric signals to and/or from the system modules via the suspension rails, said electric signals including a power signal for powering the system modules wherein the system further comprises a low voltage power supply unit for providing the power signal, the power signal being a low voltage electrical power signal, and wherein for conveying the electric signals the suspension rails comprise one or more conductor sections, wherein the conductor sections are formed of a conductive material substantially comprising aluminum; and wherein the conductive material comprises a surface layer of anodized aluminum. 
         [0007]    The present invention is particularly directed at lighting, detection and control systems for use in industrial constructions and vehicle service constructions. The term ‘vehicle service construction’ as used herein is to be interpreted as a construction to be particularly used for providing a function to vehicles, such as offering therein a vehicle related service or facilitating transportation, typically for professional use. For example, a vehicle service construction could be a large parking garage, a maintenance garage, a tunnel or an open tunnel or semi tunnel, a fly-over or overpass. An industrial construction should be interpreted as including storage facilities, manufacturing constructions, chemical plants, distribution centers, and similar professional and industrial facilities that are to be equipped with standard building services such as lighting, signaling and signposting, user interfaces, safety and service detectors, and the like. 
         [0008]    The system of the present invention operates at low voltage levels, e.g. &lt;75V DC. These voltage levels are relatively safe to allow lenient safety regulations. In particular, since in many of the constructions and facilities mentioned above the system is exposed to humid climates, and may be easily accessible to vermin and other external factors, the use of low voltages is advantageous from a safety perspective. 
         [0009]    At low voltage levels, however, currents must be relatively large such as to provide the required electrical power for powering a number of lighting and other modules. This is in particular the case when the distance between the most remote system module and the power supply module is large, and/or where the number of system modules is large. To allow sufficiently large currents between the power supply and the most remote system module, whilst minimizing dissipated energy in the conductor (or at least keeping it within limits), the resistance of the conductor must be low. The conductor thus should ideally have a large cross section. 
         [0010]    The present invention is based on the insight that under these conditions, an aluminum conductor, or conductor being made of a conductive material consisting of mainly (e.g. at least 80% by weight) aluminum, allows the conductor to comprise a sufficiently large cross section such as to yield a low overall resistance between the power supply and each of the modules. Since aluminum is a low weight metal, it can be handled with ease providing an easy to install system. Moreover, aluminum is a relatively cheap material as compared to other materials with similar electrical properties. 
         [0011]    Copper, for example, is per unit of volume approximately three times as heavy as aluminum, but copper is a slightly better conductor (approximately 1.7 times as good as aluminum (at 20° C.: Al: σ=3.50*10 7  S/M; Cu: σ=5.96*10 7  S/m). In comparison, a system comprising copper rails or rails with copper conductor sections operating at the same low voltage levels would be approximately twice as heavy. Since the price of copper per weight unit is approximately four times that of aluminum, the conductive parts of such a system would be approximately eight times as expensive. 
         [0012]    As follows from the above, the modular lighting, detection and control system of the present invention which is placed on aluminum conductor sections is advantageous, in particular where the system operates at low voltage levels. When it comes to robustness of the system, it must be said that aluminum may be more prone to corrosion than copper. Therefore, in accordance with the invention, the conductive material of which the conductor sections of the suspension rails are made may be made of anodized aluminum. Anodized aluminum comprises a protective and electrically insulating surface layer. This surface layer protects the interior aluminum conductor material against corrosion, and prevents an electric shock to occur when the surface of the conductive material is touched. In particular at the low voltage levels of the lighting, detection and control system of the present invention, the use of anodized aluminum is effective in obtaining the desired advantages at low cost. As will be appreciated to achieve the same level of protection with a copper conductor, the conductor must be covered with an insulating layer (such as the cladding of an electrical cable) or must be enclosed by the protective rail. 
         [0013]    Moreover, in accordance with a further embodiment, one or more of the conductor sections may be integrally formed with the suspension rail, and the suspension rail itself may be formed with the same conductive material. Whether or not the conductor section is integrally formed therewith, the use of aluminum for providing the suspension rail already provides advantages from the prospective of being low cost and lightweight. 
         [0014]    In accordance with a further embodiment of the present invention, the system modules of the modular lighting, detection and control system of the present invention, for mounting of those modules on at least one of the suspension rails, include a mounting electrode. The mounting electrode is formed of a conductive material and includes a pointed tip that can be forced through the layer of anodized aluminum into the interior aluminum of the conductor section. This will establish a conductive connection with the conductor section of the suspension rail. 
         [0015]    It is in particular recognized that a conductive connection between a conductor section of the suspension rail and the module of the embodiment mentioned hereinabove, advantageously is protected against corrosion. In particular, since the bare aluminum will easily corrode, a conductive connection between the system module of the embodiment mentioned hereinabove and the conductor section may deteriorate overtime. Due to the corroding aluminum, the resistance of the conductive connection may increase, and its conductivity may decrease. Lighting modules being powered by electrical signals conveyed via the conductor sections may therefore fail overtime when the resistance of the conductive connection becomes too large due to corrosion. Before this will happen in those embodiments wherein also an electric data signal is included in the electric signals conveyed, the data signal that is also provided via the conductor sections may fail, since the relatively weak and alternating (binary) data signal is more prone to the increasing resistance of the conductive connection than the electrical power signal. 
         [0016]    In view of the above, in accordance with a further embodiment, the mounting electrode further includes a seal for sealing the conductive connection which is established between the pointed tip and the conductor section. The seal provides a further barrier that prevents the conductive connection from being in contact with the relatively humid exterior climate. Advantageously, in accordance with a further embodiment, the seal may be a flexible seal which surrounds the pointed tip, and which may be compressed to provide a desired sealing function when the pointed tip is forced into the conductor section through the anodized aluminum layer. 
         [0017]    For forcing the pointed tip through the anodized layer of aluminum, the system module in accordance with an embodiment of the present invention may comprise a mounting member which cooperates with the mounting electrode. In accordance with various embodiments, the mounting electrodes may comprise at least one of the group comprising: a screw for screwing the mounting electrode with the pointed tip into the anodized layer; a pin cooperating with a spring for forcing the tip through the anodized layer by spring force of the spring, or a pin cooperating with a clamp mechanism on the mounting member. 
         [0018]    The suspension rails in accordance with a further embodiment of the present invention may comprise multiple conductor sections. These conductor sections may be electrically insulated from each other for conveying one or more of the electric signals separate from each other. For example, the electric data signals may be separated from the power signals for powering the modules. Moreover, the suspension rails may include conductor sections for carrying different data signals separate from each other, and may also comprise multiple conductor sections for carrying the power signals. In accordance with a further embodiment, the data signals and power signals may be conveyed over the same conductor sections. The system may for example make use of powerline communication wherein the data signals are super imposed over the power signals. 
         [0019]    The system may further comprise a data communication module for providing and/or receiving the electric data signals. This data communication model may be arranged for supporting at least one data communication protocol of a group comprising: a fieldbus type protocol, such as Profinet protocol or EtherCAT protocol; a power line communication type protocol, such as DC-LIN or DC-BUS or European Installation Bus (EIB) or digital addressable lighting interface (DALI). The data communication module may be integrated in a control module. 
         [0020]    The system modules in accordance with an embodiment of the present invention may include one or more of a group comprising a lighting module comprising a lighting armature, a control module for controlling one or more other system modules, an object detection module such as a vehicle detection module for detecting the presence of a vehicle, or a motion detection module. 
         [0021]    In accordance with a further aspect of the present invention there is provided a suspension rail being arranged for receiving system modules in use suspending therefrom, the rail comprising one or more conductor sections, wherein the conductor sections are formed of a conductive material substantially comprising aluminum. 
         [0022]    In accordance with a third aspect of the present invention as provided a system module for use in a modular lighting, detection and control system in accordance with a first aspect, wherein the system module is arranged for mounting thereof on a suspension rail of the system for suspending therefrom, wherein for mounting thereof on at least one of the suspension rail the system module includes a mounting electrode, said mounting electrode being formed of a conductive material and including a pointed tip for forcing said pointed tip through the layer of anodized aluminum such as to establish a conductive connection with at least one of said conductor sections of the rail. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0023]    The invention will further be elucidated by description of some specific embodiments thereof, making reference to the attached drawings. The detailed description provides examples of possible implementations of the invention, but is not to be regarded as describing the only embodiments falling under the scope. The scope of the invention is defined in the claims, and the description is to be regarded as illustrative without being restrictive on the invention. In the drawings: 
           [0024]      FIG. 1  illustrates various modules of a modular lighting, detection and control system of the present invention; 
           [0025]      FIG. 2  illustrates a connection between the lighting module and a suspension rail in cross section; 
           [0026]      FIG. 3A  illustrates a connection between the lighting module and a suspension rail in bottom view, part of which is cut away; 
           [0027]      FIG. 3B  illustrates a magnification of the cut away portion of  FIG. 3A ; 
           [0028]      FIG. 4  illustrates a suspension rail of a system of the present invention; 
           [0029]      FIGS. 5A and 5B  respectively illustrate a top and bottom view of a mounting member for use in a system in accordance with the present invention; 
           [0030]      FIG. 6  provides a schematic illustration of the various parts of the mounting member of  FIGS. 5A and 5B ; 
           [0031]      FIGS. 7A and 7B  respectively illustrate a top and bottom view of a lighting module of a system of the present invention; 
           [0032]      FIG. 8  illustrates a control module for use in the system of the present invention; 
           [0033]      FIGS. 9A, 9B and 9C  illustrate various levels of redundancy of the control module in system arrangements in accordance with the present invention; 
           [0034]      FIG. 10  schematically illustrates a system in accordance with the present invention; 
           [0035]      FIG. 11  illustrates a vehicle detection module for use in a system of the present invention; 
           [0036]      FIG. 12  schematically illustrates a connection between a mounting electrode of a mounting member and a conductor section of a suspension rail in a system in accordance with the present invention; 
           [0037]      FIGS. 13A and 13B  illustrate a suspension rail in accordance with a further embodiment of the present invention; 
           [0038]      FIGS. 14A, 14B and 14C  illustrate a lighting module for use with the suspension rail illustrated in  FIGS. 13A and 13B ; 
           [0039]      FIGS. 15A and 15B  illustrate a connection between the lighting module of  FIGS. 14A-C  and a suspension rail of  FIGS. 13A and 13B , part of which is cut away. 
       
    
    
     DETAILED DESCRIPTION 
       [0040]    In  FIG. 1 , various parts of a modular lighting, detection and control system  1  in accordance with the present invention are illustrated.  FIG. 1  illustrates a suspension rail  3 , a mounting member  5 , and a lighting module  7 . To mount the lighting module  7  onto the suspension rail  3  of the system  1 , the mounting member  5  comprises mounting electrodes connectable with conductor sections of the suspension rail  3 . The mounting member  5  is mounted onto the suspension rail  3 , and the lighting module  7  may conveniently be connected to the mounting member  5 . The power signals and data signals are exchanged between the mounting member  5  and the lighting module  7  via input/output connection  8  of the module  7 . 
         [0041]      FIG. 2  illustrates a cross section of lighting module  7  being connected by means of the mounting member  5  to the suspension rail  3 . The suspension rail  3  comprises conductor sections  12 ,  13 ,  14  and  15 . In the embodiment illustrated, conductor sections  12  and  13  convey the power signals for powering the various modules connected to the system. The conductor sections  14  and  15  convey the data signals for controlling the various modules in the system  1 . The lighting module  7  comprises a plurality of light emitting diodes (LED&#39;s)  10 . As indicated in  FIG. 2 , once assembled, the suspension rail  3 , the mounting member  5  and the lighting module  7  have a thickness of only 50 mm. Cooling ribs  60  extend sideways relative to the height dimension of the system. The modular lighting, detection and control system of the present invention is therefore highly efficient in space usage. The suspension rail  3  will be connected to the ceiling of a building (such as a parking garage) by means of the slot  35  which may correspond to a suitably shaped bolt that may be fixed to the ceiling. Once the suspension rail  3  is attached to the ceiling, modules may easily be added to the system  1  by mounting the mounting members  5  to the rail  3 , and fixing the respective system modules (such as lighting module  7 ) to the mounting members  5 . 
         [0042]      FIG. 3A  provides a perspective bottom view of the connected lighting module  7 , mounting member  5  and suspension rail  3  illustrated in  FIG. 2 . Part of the illustration is cut away such as to show the typical connection between a mounting electrode  23  and a conductor section  13  of the rail  3 . An enlarged view of the cut away section B is illustrated in  FIG. 3B . 
         [0043]    Suspension rail  3  comprises a plurality of conductor sections  12 ,  13 ,  14  and  15 . Mounting member  5  is connected first with a mechanical connection to the suspension rail  3  by using a leg bolt through opening  16  into slot  37  of the rail  3 . Next, an electrical connection between the conductor sections  12 ,  13 ,  14  and  15  of the rail  3  and the mounting member  5  is made by forcing the pointed tips of the mounting electrodes of the mounting member  5  into the respective conductor sections  12 - 15 . For mounting electrode  23 , this is made visible in the cut away view in  FIG. 3 a   . The cut away portion B is enlarged in  FIG. 3B . Mounting electrode  23  is forced into conductor section  13  by means of a screwable clamping pin  20  of the lighting module  7 . The clamping pin  20  and the mounting electrode  23  cooperate such as to enable forcing of the pointed tip of mounting electrode  23  into conductor section  13 . Corresponding mounting electrodes are present in the mounting member  5  for connecting to the respective conductor sections  12 ,  14  and  15  as well. These, in turn, cooperate with corresponding clamping pins in the lighting module  7 . By forcing the pointed tip of mounting electrode  23  into the anodized aluminum conductor section  13 , the tip is forced through the anodized layer enabling the electrical connection. This is illustrated in  FIG. 12 . 
         [0044]      FIG. 12  illustrates the mounting electrode  23  of which the pointed tip  29  is forced into the aluminum  30  of which the conductor section  13  is made. Conductor section  13  is made of anodized aluminum, which comprises a passive surface layer  32  as illustrated in  FIG. 12 . The surface layer  32  is electrically insulating and also protects the interior aluminum  30  of the conductor section  13  against oxidizing. The pointed tip  29  of mounting electrode  23  is forced through the surface layer  32  into the aluminum  30  providing an electrical connection schematically illustrated by interface  34  in  FIG. 12 . To prevent oxidizing of the aluminum  30  at the interface  34  over time, the mounting electrode  23  moves inside a sleeve  26  (e.g. a metal sleeve). The sleeve  26  on one end provides room for a flexible seal  25  which is arranged therein. The flexible seal  25  is circumferential to the mounting electrode  23 , and once the mounting electrode  23  is forced into the aluminum  30 , the flexible seal  25  is slightly compressed against the sleeve  26 , the electrode  23  and the surface layer  32 . This prevents a direct connection between the electrical interface  34  and the exterior environment. Because the modular lighting, detection and control system  1  of the present invention may often be used in humid environments, application of the seal  25  for sealing the electrical connection  34  is preferred to prevent oxidizing of the aluminum  30 . As will be appreciated, without the seal, oxidized aluminum may overtime deteriorate the electrical connection through interface  34 , increasing its electrical resistance. This may prevent proper reception of the data signals and power signals by the lighting module  7  through the mounting member  5 . 
         [0045]      FIG. 4  provides a perspective view of a suspension rail for use in a modular lighting, detection and control system  1  of the present invention. The rail  3  comprises the conductor sections  12 ,  13 ,  14  and  15 . Between the conductor sections  12 - 15  and the body  17  of the rail, insulating layers  18  and  19  prevent short circuit and interference between the various electrical signals conveyed by the conductor sections  12 - 15  via the body  17 . Preferably, not only the conductor sections  12 - 15  but also the body  17  of the suspension rail  3  is made of aluminum, for example anodized aluminum. As mentioned hereinabove, this will render the rail  3  to be relatively low weight. The body  17  of the rail  3  further comprises a slot  35  for fixing the rail  3  to a ceiling or wall of the construction wherein the system will be applied. A further slot  37  allows to provide a mechanical connection using a leg bolt with the mounting member, e.g. through opening  16  in the mounting member.  FIG. 4  also reveals that the suspension rail  3  is provided on one side with a suitably shaped edge  48  serving as reverse protection to the system. The edge  48  corresponds with another edge  49  serving as reverse protection on the mounting member (illustrated in  FIGS. 5A and 5B ). The edge  48  and the corresponding edge  49  respectively on the suspension rails  3  and the mounting member  5 , are also illustrated in  FIG. 2 . The edge serving as reverse protection, prevents a user from mounting the mounting member  5  such that the mounting electrode that receives the direct current power signal in use, would be connected incorrectly such as to damage the system module that is connected to the mounting member  5  of the system  1 . The reverse protection formed by edges  48  and  49  only allows the mounting member to be connected to the suspension rail in the correct orientation relative thereto. 
         [0046]      FIGS. 5A and 5B  respectively illustrate a top and bottom view of a mounting member  5 . In addition to mounting electrode  23 , the mounting member  5  comprises further mounting electrodes  41 ,  42  and  44 . Moreover, address selection such as  47   a  and  47   b  may optionally be present such as to allow addressability of each of the system modules via a mounting member  5 . The address selection provided by optional switches  47   a  and  47   b  allows to target a data signal to specific system modules such as to control such modules. 
         [0047]    As seen in  FIG. 5B , the mounting member  5  further comprises module reception holes  46 . The module reception holes  46  correspond with mounting pins  62  on the system modules (e.g. see  FIG. 7A ) enabling convenient installation. Also visible in  FIG. 5B  is input/output connector  50  which corresponds with a complementary input/output connector  8  on the modules such as to exchange the respective electrical signals with the system modules (i.e. the power signal and data signals). 
         [0048]      FIG. 6  illustrates schematically the various electronic components that may be present inside mounting member  5 . Also visible in  FIG. 6  is a bottom view of suspension rail  3 , showing conductor sections  12 ,  13 ,  14  and  15 . On mounting member  5 , mounting electrode  41  connects with conductor section  15  on suspension rail  3 . This is schematically indicated by dot  41 ′. Correspondingly, mounting electrode  42  connects to conductor section  14  as indicated schematically by dot  42 ′. Mounting electrode  23  connects with conductor section  13  as indicated by dot  23 ′, and mounting electrode  44  connects to conductor section  12  as indicated schematically by dot  44 ′. The mounting member  5  comprises a central processing unit (CPU)  52 . The mounting member  5  further comprises a DC power adaptor  53  receiving the direct current input power from the conductor sections  12  and  13 . Connected thereto is a LED driver  45  which uses the received power signal for driving the light emitting diodes of the lighting module. The LED&#39;s of the lighting module (not shown) may be operated by means of the CPU  52  which connects to the LED driver. The driving signals for operating the LED&#39;s are provided, together with the power signal, via input/output connector  50  to the corresponding connector  8  of the lighting module  7 . The CPU  52  is controlled by receiving data signals via the conductor sections  14  and  15  through a communications module (Comm). 
         [0049]      FIGS. 7A and 7B  respectively illustrate a top and bottom view of a lighting module  7 . The lighting module  7  is one of the system modules of a modular lighting, detection and control system of the present invention. The lighting module  7  comprises mounting pins  62  that correspond with the reception holes  46  of the mounting member  5 . Also visible in  FIG. 7A  is the input/output connector  8  of the lighting module. Cooling ribs  60  for the LED&#39;s extend to the side of the lighting module relative to the suspension rail. Light of each of the lenses is correctly distributed by means of lenses  10  (which are also visible in  FIG. 2 ). The electronics required to support operation of the LED&#39;s is integrated in the lighting module  7  by means of printed circuit board (PCB)  65  and  66 . The lighting module  7  may be made of aluminum, e.g. by means of extrusion. In the embodiment illustrated in  FIG. 7 , the lighting module  7  comprises twelve LED&#39;s. Dependent on the requirements, the number of LED&#39;s may be larger or smaller. 
         [0050]      FIG. 8  illustrates a control module for use in a modular lighting control system of the present invention. The control module serves as an intermediate between the central server system (e.g. server  125  in  FIG. 10 ) and the various system modules integrated in the modular lighting, detection and control system. The control module  70  enables to control the different system modules by the server. The embodiment shown in  FIG. 8  typically illustrates a control module based on an EtherCAT protocol. A control module  7  comprises a number of four pole M12 connectors  72  for data exchange. The number of connectors  72  may be larger or smaller depending on the requirement, and depending on the protocol used. Alternative embodiments of a control module as illustrated in  FIG. 8  may be based on different protocols, such as Profinet, and may require less connections. 
         [0051]      FIGS. 9A, 9B and 9C  schematically illustrate various levels of redundancy in the control module. In a non-redundant implementation as illustrated in  FIG. 9A , a server  80  may control a single control module  81 . The control module  81  made by itself control a maximum total of 64 lighting units  85  (the number being dependent on the addressing scheme applied). Power of the system is supplied by power supply unit  82 . The suspension rail is schematically illustrated by the double black line  84 . 
         [0052]      FIG. 9B  illustrates a semi-redundant implementation. In the implementation illustrated in  FIG. 9B , a single server  80  connects via a single data loop connection  83  with two control modules  81  and  86  present on the suspension rails  84 . If one of the control modules fails, the other control module still allows operation of the lighting modules  85 . 
         [0053]    A full redundant implementation is illustrated in  FIG. 9C . The full redundant implementation comprises two servers  80  and  90 . Server  80  is the master server which connects to master data loop  83 . Server  90  is the slave server which connects to slave data loop  93 . A first control module  81  connects to master data loop  83  and may be operated by server  80 . A second control module  86  connects to slave data loop  93  and can be operated by server  90 . If one of the control modules  81  or  86 , or one of the data loops  83  or  93 , or one of the servers  80  or  90  fails, the system may still be fully operational as a result of the redundancy. 
         [0054]      FIG. 10  illustrates schematically a modular lighting, detection and control system of the present invention. In  FIG. 10 , a suspension rails  100  may be fixed to the ceiling or walls of for example a parking garage or a tunnel. A suspension rails  100  enable to suspend a number of system modules such as lighting modules  101  and  111  to the various rails  100  and  110 . The lighting modules on the rails  100  can be operated by means of control module  103  and redundant control module  104 . Rails  100  comprise a power supply  107  enabling powering of the 64 lighting modules  101 . In addition, the rails  110  enable to suspend in total 64 lighting modules  111  thereto. These lighting modules  111  are powered by power supply  117 . Moreover, control units  113  and  114  redundantly control operation of the lighting modules  111  on rail  110 . The schematic illustration provided in  FIG. 10  typically shows a semi-redundant control scheme for controlling the lighting modules (compare  FIG. 10  to  FIG. 9B ). Data to the various control modules is provided via data loop  120 . As may be appreciated, although a single data loop  120  is illustrated in  FIG. 10 , multiple data loops may be implemented such as to serve each of the suspension rails  100  and  110  in a semi-redundant manner. The control units  103 ,  104 ,  113  and  114  are operated by means of a central server  125 . The central server  125  runs a management software program  128  allowing to control the modular lighting, detection and control system of the present invention. The standard server  125  may be connected to the internet  130  such as to allow to control the standard server remotely by means of for example a laptop  132  or a tablet type or other portable computer  133 . In  FIG. 10 , an example of a typical graphical user interface (GUI)  135  is illustrated. 
         [0055]      FIG. 11  further illustrates a different type of system module that may be applied for example in a parking garage. The module  140  illustrated in  FIG. 11  is a vehicle detection module that allows to detect whether a specific parking space in a parking garage is occupied or not. To indicate this, the module  140  comprises a green light  141  and a red light  142 . In case the parking space is unoccupied, this is indicated by means of the green light  141 . 
         [0056]    A further embodiment of a modular lighting, detection and control system  201  in accordance with the present invention is illustrated in  FIGS. 13-15 .  FIGS. 13A and 13B  illustrate a suspension rail  203  for use in this further embodiment of the present invention. In  FIG. 13B , the suspension rail  203  is illustrated in cross section. Suspension rail  203  comprises conductor sections  212  and  213 . The conductor sections  212  and  213  are arranged for providing the power signal (i.e. a low voltage electrical power signal) to the modules of the modular lighting, detection and control system. In the present embodiment, the suspension rail  203  does not comprise conductor sections for providing a data signal to the respective modules. The rail  203  can be used in a relatively plain embodiment wherein no data signal is provided to the respective modules. For example, such an embodiment would be suitable for simply providing lighting only, wherein the power supply to the lighting modules may be controlled either for the whole system or the rail by a separate controller. Switching the lighting modules on and off may for example be controlled by switching the power signal on and off by a controller. 
         [0057]    The suspension rail  203  with the conductor sections  212  and  213  may alternatively be used in a system wherein data is provided to the respective modules via power line communication. In such an alternative embodiment, the data signal is super-imposed over the power signal and is conveyed via the conductor sections  212  and  213  to the respective modules. The respective modules may in that case be arranged for separating the data signal from the power signal for internal use. 
         [0058]    The conductor rail  203  further comprises a body  217  to which the conductor sections  212  and  213  are fixed. Slot  235  allows to fix the body  217  to the ceiling or a wall of the construction wherein the system will be applied. A further slot  237  allows to provide a mechanical connection, using for example a leg bolt, with the respective modules of the system. 
         [0059]    A typical lighting module  207  for use in a modular lighting, detection and control system  201  in accordance with this embodiment is illustrated in  FIGS. 14A, 14B and 14C . The lighting module  207  comprises an integrated mounting member  205  which allows to fix the lighting module  207  to the suspension rail  203 . Integration of the mounting member  205  into the lighting module  207  has several advantages. For example, for installing a lighting module  207  on the suspension rail  203 , it is not necessary to first install the mounting member, thereby providing a more easy installation of the modular lighting, detection and control system in accordance with this embodiment. However a major advantage is provided by the fact that integrating the mounting member  205  into the lighting module  207  allows to provide a very flat construction. Measured from the body of the suspension rail where it is mounted to the wall or ceiling, the thickness of the system including the lighting module  207  could be typically 30 mm (or even smaller if desired). 
         [0060]    As can be seen in  FIG. 14A , the lighting module  207  comprises a plurality of cooling ribs  260 . Moreover, as visible in  FIG. 14B , the lighting module  207  comprises mounting electrodes  223  and  244 . Mounting electrode  223  will be mounted onto conductor section  213  of suspension rail  203 , where is mounting electrode  244  will be mounted onto conductor section  212  of suspension rail  203 . Printed circuit boards  266  are arranged within the lighting module  207  contiguous to the light emitting diodes  210 , as illustrated in  FIGS. 14B and 14C . 
         [0061]      FIGS. 15A and 15B  provide a perspective view of the connected lighting module  207  and suspension rail  203  described above. The suspension rail  203  and lighting module  207  are part of a modular lighting, detection and control system  201  in accordance with this embodiment. Visible in  FIG. 15A  is the suspension rail in  203  comprising a body  217 . Further visible in  FIG. 15A  is the lighting module  207 . Part of the FIG.  15 A is cut away (illustrated by section G), and an enlarged view of the cut away section is illustrated in  FIG. 15B . 
         [0062]    Visible in  FIGS. 15A and 15B  is the slot  235  in suspension rail  203  for fixing the suspension rail  203  to a wall or ceiling. Also visible in  FIGS. 15A and 15B  is the further slot  237  which allows to provide a mechanical connection between the lighting module  207  and the suspension rail  203  by means of a leg bolt  267 . The leg bolt  267  is accessible via opening  216  in the lighting module  207 . In the lighting module illustrated in  FIGS. 14A-C , as can be seen in  FIG. 15B , the mounting electrodes  223  and  244  are fixed within the construction of the lighting module  207 . Forcing the pointed tips of the mounting electrodes  223  and  244  (e.g. pointed tip  229  of mounting electrode  223 ) into the respective conductor sections (e.g.  213 ) is achieved by fixing the lighting module  207  to the suspension rail  203  by means of the leg bolt  267 . By fastening the leg bolt  267 , the force exerted on the mounting electrodes  223  and  244  will drive the pointed tips (e.g.  229 ) into the suspension rails (e.g. suspension rail  213 ). This will provide a conductive connection such as illustrated in  FIG. 12  between the mounting electrode and respective conductor section. Also visible in  FIG. 15B  are the sleeve  226  of the electrode  223  and the flexible seal  225  surrounding the pointed tip  229 . The seal  225  prevents the conductive connection from being exposed to the environment, as explained before. 
         [0063]    For the purpose of clarity and a concise description features are described herein as part of the same or separate embodiments, however, it will be appreciated that the scope of the invention may include embodiments having combinations of all or some of the features described. The present invention has been described in terms of some specific embodiments thereof. It will be appreciated that the embodiments shown in the drawings and described herein are intended for illustrated purposes only and are not by any manner or means intended to be restrictive on the invention. The context of the invention discussed here is merely restricted by the scope of the appended claims.