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I need to develop a solution for determining whether an object/tag exists within a defined perimeter. The perimeter would be located indoors so GPS isn't an option. It would be an approx 10 metres x 10 metres rectangle. The 'tag' needs to fit in a person's pocket (however it could be battery powered), and I would need to know:

  1. When the tag leaves the perimeter (doesn't have to be exact and I don't care where it is located within the perimeter)
  2. Identify the tag left the perimeter (as there will be 10-20 objects in the perimeter that need to be tracked)

Would an active RFID system be the way forward? I'm thinking that I'd need 3-4 receivers spaced around the perimeter so that I can combine the readings from them to estimate the position.

Really appreciate any advice or suggestions.

Mahendra Gunawardena
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tpag26
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2 Answers2

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  1. I have used EPC GEN2 [EPC865-868 MHz(Europe), 902-928 MHz(USA)] technology for an automated document management system. You can find long distance antennas on the market. For example - GAO RFID can be good choice.

  2. Tags supported by such a system can be found everywhere, including Alibaba.com and Amazon.com. Tags can be active or passive so you can choose what best fits you. Also, I recommend that you choose tags CPU/MEM size with care, because this can improve your solution's quality and/or features.

  3. Speaking of tags, there are on the market printers like ZEBRA which can print you out customized tags.

anonymous2
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Amit Vujic
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IF you would like to located indooer, rfid and bluetooth would be best choice. It has UHF and HF for rfid requency, respectively 860-960MHz and 13.56Mhz. And UHF divided into 902-928 MHz(USA) 865-868 MHz(EU). The passive rfid is better option than active if space not too big. I would recommend the SEIKO RFID for you, you will find more required information from the site.

anonymous2
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Lin David
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