On Saturday 02 September 2006 02:57 pm, Rony wrote: > jtd wrote: > > If u have guide railings and the user walks up to that point all > > problems are resolved. U have location, orientation and distance. > > The beacon can transmit proper info at the additional cost of > > having several rails and beacons -eg 7 at prabhadevi signal. Also > > now they cannot be used at a distance. > > The guide railings are meant to differentiate between road and foot > path safety limits and have the additional facility of instructions > emobssed on them. The guide rail does not bring the user to his > destination,
It will. The main problem was location and orientation of the user. Once he is at the rail both are fixed. Therail has a fm transmitter which is broadcasting it's location and neighbouring locations but at a low power so the info is recieved only a meter or 2 near the rail. The info will provide very acurate info like go right for worli naka, cross road for nehru science center, bus stop is to the left etc. You need to restrict the reception area because a person accross the road is oriented differently and will get a slightly different set of info. The system is non interactive and the reciever is any fm reciever. > > A simple alternative option of providing user orientation to the > signpost can be to incorporate buttons in the railings that the > user will press as he reaches the end of the footpath. not needed. Just face the railing to be correctly postioned. > The problem here is that how does the post identify the device to > which it has to broadcast? There is no post. Or maybe a post which only announces it's location and recieveable upto 50 mtr. Carrier of post and rail are different. > So here is a practical example. > > A user is slowly walking along the road from Sah and Sanghi auto > shop towards Prabhadevi Junction, feeling his way on a railing. As > he approaches the Century Bazar signal, the railing tells him that > a junction is approaching. Just before the junction, the user His fm radio is already tuned to a fixed frequency (alloted by govt throught India - maybe the world by ITU) when he reaches the junction he will get brief info about the neighbourhood from the rail. At the same time someone is on the opposite footpath and also wants to go to Ceat building. He too walks up to his rail and recieves a different set of instructions to go to the same location from the Holy rail. As are others on different rails. One just waits a little to recieve the endlessly txd message. Each rail has it's own independent electronics not linked to any thing else. -- Rgds JTD -- http://mm.glug-bom.org/mailman/listinfo/linuxers
