Electrical Contracting News (ECN) November 2016 - Page 59

HOME AUTOMATION & INTELLIGENT BUILDINGS Smarter lighting in intelligent buildings provides an opportunity to reduce the complexity that is commonly found in modern workplaces. occupancy sensor can forward its data to the HVAC systems, window blinds and security management system, as well as the lighting control system. It may also become possible for a single sensor to control all of the requirements of a space. One obvious example is an occupancy sensor in a toilet that controls both the lighting and the solenoids responsible for urinal flushing. Such a sensor can be installed in a luminaire so that it is hardly visible, as a cure for ‘ceiling acne’. If these sensors are installed in a number of luminaires it will enable the data to be evaluated in much finer detail, perhaps to optimise the lighting and temperature control for a single workstation. The same principle can be applied to car park lighting, linking presence sensors to satellite navigation and guiding drivers to free parking spaces. And, of course, there are many other similar examples. The luminaires can also be used to discreetly ‘host’ other technologies such as Bluetooth transmitters, enabling people to navigate a space via their smartphones. Again, a key advantage is that no extra power supply or separate batteries are required to run these devices. Managing space This occupancy data can also be used by the facilities management team to assess how each space is being used. Traditionally, such space utilisation studies are very resource intensive, necessitating a walk around the building armed with a clipboard to record which workstations are in use. Across a large estate this can take several days and, for that reason, are only carried out occasionally. Even when a full survey is carried out, considerably more time is required to analyse the data, so that facilities managers rarely have an up to date picture of space usage. Harvesting current data from lighting occupancy sensors will enable them to manage their space far more effectively. To that end, our company is already trialling a dashboard that pulls in information from lighting occupancy sensors to provide a graphical overview of occupancy patterns. ‘Technologies now exist to use the lighting infrastructure in better ways, to control the lighting and much more.’ SPECIAL FEATURE Nor should we lose sight of the opportunity to greatly enhance the way that the lighting is controlled. In addition to the usual parameters that are monitored by lighting systems, such as daylight and occupancy, there are sensors that can also measure colour temperature. When linked to tuneable white lighting this means that the colour temperature can be adjusted to suit changing conditions. Taking this principle slightly further, there are now sensors that use charge coupled device (CCD) technology to detect contrast and are a clever alternative to a PIR sensor. These have the ability to ‘understand’ the activity in the space. If they detect that people are walking around they will change the lighting to suit circulation. If someone is standing close to the wall the system may assume a presentation is taking place and switch to presentation mode. This same sensor can also detect when people are in a meeting and select a suitable lighting scene, which can include reducing the amount of direct light if it detects that reflective screens (tablets, computers) are in use. Summary The key point here is that technologies now exist to use the lighting infrastructure in better ways, to control the lighting and much more. For contractors, the important thing is to consider how these technologies can be applied to best suit the requirements of each end client, teaming up with experts where appropriate. NEXT ISSUE DATA CABLING As well as its regular range of news and features, December’s issue of ECN will contain a special feature dedicated to data cabling. The feature will include articles and information from major \[Y\ݚY[H[Hق[ܛX][ۈX]H]\\Y\˜[XX[][Y[˜YX[H]HX[X܋܂[XX[۝XܜHX]\B[ݙHHH[XXHY\[B[܈[]\\[[][\\XKHX]\H[[[YB^[]HX[ܛX][ۈB[HY\[H[\B\[\H[Hو\HYY\X[\ۈ\H[B\HX]HY[\Y XZH\H][H۸&]Z\\XZ܈ܝ[]BY\\H[\XPӸ&\ XY\[[H[Hۈ M M [P[[YYX[ BN MNHIP8$[X[ [ NBLL ̌ M L΍ B