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Date: Fri, 08 Nov 2002 11:51:10 -0800
From: Charles Edmondson
Organization: Edmondson Engineering
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:0.9.4.1) Gecko/20020508 Netscape6/6.2.3
Subject: Re: Vehicle Detection using RFID other technologies.
X-Original-Trace: 8 Nov 2002 11:51:06 -0700, 10.38.34.223
> "Sanjeev Gupta" wrote in message
>>We are looking for a transmitter/receiver that can detect a vehicle,
>>equipped with a transmitter, travelling at a speed of upto 100 km. per
>>hour on a highway. The receiver should be able to read a serial number
>>from the tag attached to the vehicle and send it to a receiver
>>attached to a computer via serial/USB port. There should not be any
>>restriction for direct line-of-sight between the vehicle and the
>>receiver/sensor. The sensor shall be placed at a distance of 100
>>meters from the vehicle. The sensors/transmitters should be able to
>>function in a rugged environment with dust and heat. There should be
>>no human intervention required. The product should be low-cost and
>>require no or little maintenance.
>>We will not be able to use the road loop antenna or overhead gantries.
>>Please keep the following issues in mind :-
>>1. The speed of the truck can be between 60 to 100 km/hr.
>>2. There can be more than one truck within the range of the receiver
>>at any given point.
>>3. The truck can stop witihin the receiver range. In such a situation
>>the receiver should not record multiple instances of the trucks
>>4. There can be bumper to bumber traffic and the truck can be in the
>>further most lane.
>>5. There could be line of sight between truck and receiver
>>6. Computer being on throughout, should not result frequent
>>7. Distance between truck and receiver can be upto 100 meters.
>>8. Climate conditions.
>>9. Power problems on non-city roads. Battery backups.
>> Best Regards
>> Sanjeev Gupta
Look around the TI website for TIRIS. Did this kind of stuff 8 years ago for toll operations. Distance just requires a better attenna...
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