Are there technology a local location (not GPS\\Glonass)?


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There is a company. The company has thousands (tens of thousands) of objects, location of which would be useful to know (cars, forklifts, cranes, people, certain mechanisms, packaging of finished products, etc.) to Cling on each of these objects GPS silly: firstly, it is very expensive, and secondly they just steal.


I came up with the idea that maybe the technology exists locally determine the position of objects on the same principles on which is built the GPS\\Glonass: the corners of the enterprise installed a couple of pieces of local transmitters (their coordinates are precisely known and constant), and to monitored targets are hung the receivers.

At the same time:

1. The cost of receivers is lower because the signal need not catch from the flying devils-where satellites and transmitters that are within a couple hundred meters.

2. Steal receivers makes no sense — outside of the enterprise they are useless.


There is something like that in the ready (semi -)?
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7 Answers

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Given that you need to minimize the price of the devices hang on the monitored objects, and RFID is your only option. Passive RFID tags operate at a distance of one meter, so you probably need an active (with their food), they cost several dollars apiece. But the receivers are quite expensive.
\r
Can still consider the system Ubisense — worth tens of thousands dollars, but the device touches on the monitored objects by themselves are useless (well, unless the batteries potyrili). Receivers really are hung in the corners of the building are connected to a local network, and Daut the accuracy of the order of tens, see
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An overview of such technologies in Russian can be found here: http://www.rtlsnet.ru/technology/view/4
Now prepare a topic on this subject for Habra next week I hope to publish.
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The required packages are not met, but my sleepy brain begat not a difficult option. To paste protective chips (as in the stores of samoobsluha) and in instruct of the part detectors, which combine in a single network. The option is relatively cheap and harsh, but will allow you to determine which of the areas contains the object.
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Googled an interesting patent. It is proposed to determine the position on the principle of GSM relative to the base stations. BS just put in the corners of the enterprise.
\rwww.ntpo.com/patents_electronics/electronics_2/electronics_93.shtml
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At us in Krasnoyarsk is a company NWIZ Radius it produces radar equipment and related software for object detection in mines. I think the enterprise can be set. www.radius-nvic.ru/ here's a site like it!
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In what area need to track objects? On the territory of the enterprise/city/region?
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Has anyone faced with the Nanoloc chip? What is the cost of the solution with these chips, what is the accuracy. The manufacturer promises an accuracy of half a meter.
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