Proximity sensor - RFID or similar - Develop the specification

We are looking for a device/system that can detect whether a small FOB device is within a certain range of a machine. A person will have a key FOB or RFID tag on them and a machine will know whether that person has come too close to the machine for safe operation - about 5 to 9 feet away from the machine (1.5 to 3 meters). This is commonly used with automobiles and key FOBS. The automobile senses the presence of the key FOB and allows the driver to unlock and start the car without ever pressing any buttons or inserting a physical key. Just carry the key fob in your pocket and the vehicle knows the keys are present.

Starting with the automobile example, my need is much simpler. I don't need encryption or matched keys. This is a "dumb" detection system. When ANY person wearing any of my specific FOB/RFID gets inside the defined zone, the receiver or detector simply sends a discrete output (on/off, yes/no) to drive a 12 volt relay open/closed. We just need to know "Is a person who is wearing the RFID/FOB inside the safe zone?"

The machine has 12vdc power (like an automobile). The FOB could be powered by 5 or 12VDC (or it's own button battery), but prefer passive detection if possible. The cost of the receiver/detector should be less than $100, and each FOB/RFID tag should be less than $20. Annual quantity for 2020 is at least 600 receivers, and 1000 FOBs/RFID devices.


Help determine the best technologies to use for this system

Determine if the budget is reasonable (or too high or to low)

write a specification (a few pages at most) for this system in more detail using industry standard terms

your reply back to me must include the word "blue" so I know you actually read this far.

Suggest USA based companies that might be able to provide such a system or help develop the system.

Skills: Automotive, Electronics, RFID (Radio-frequency identification), Wireless Radio Frequency Engineering

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About the Employer:
( 6 reviews ) West Branch, United States

Project ID: #19350339

14 freelancers are bidding on average $702 for this job


Hi I am most experienced embedded system developer here. I have implemented similar systems before Please get in touch to discuss more in detail Please review my profile to see the feedback from my previous works. More

$500 USD in 10 days
(185 Reviews)

"blue" Thanks sharing your project. As I'm a Senior Embedded System Engineer, so I have rich experiences in embedded device development using BLE/Bluetooth, Wifi, USB, RFID over 8+ years. Especially, I had dev More

$800 USD in 10 days
(32 Reviews)

Hello sir, I have experience in designing electronics circuits and can develop hardware compatible smartphone and PC based apps. I also have done a lot of IoT projects and can transform your idea into a fully working More

$800 USD in 20 days
(31 Reviews)

"blue" Hello, I am Anthony from Sri lanka. I have 7 years of experience in the filed and I am very much interested in your project. Why you should hire me ? * As a full time freelancer I have my ow More

$555 USD in 10 days
(42 Reviews)

i have more than 5 years experience in embedded system with product design . and i have already worked on RFID . so i can do your job within a time limit with your satisfaction.

$833 USD in 10 days
(6 Reviews)

blue Hello, My name is Atıl Uluyüce, I've been serving to global entrepreneurs for over 6 years developing their wearable smart device and robotics ideas. With my startup company, we have been developing func More

$1050 USD in 30 days
(2 Reviews)

Hi. I'm an electronic engineering student from Argentina. I've been working in for more than two years, and I've completed more than a dozen projects, all with good recommendations, you can check my prof More

$750 USD in 20 days
(6 Reviews)

//////////////////////////////////////////// BLUE ///////////////////////////////////////// Hello, I am an electromechanical and electronic technician, and I only have the thesis to be an electronic engineer. I wor More

$750 USD in 10 days
(3 Reviews)

Hello, I have gone through your requirements. Based on these I would suggest that a system with BLE tags and Reader meets all your needs and fits the budget. 1. BLE tag range : upto 42 feet. 2. BLE tag price : More

$1000 USD in 45 days
(1 Review)

"Blue" Dear, I'm mechanical engineer from Bosnia and Herzegovina with good experience in electronics and RFID systems. I can finish your project very fast and quality. Best regards.

$740 USD in 10 days
(1 Review)

BLUE Hello, I should inform you, RFID cant measure the distance between transceiver and tag/card. The better solution is by using PIR, where it will detect the human's body heat and it will measure the distance be More

$400 USD in 3 days
(0 Reviews)

Hi Mr Blue, I am Hamza. An electrical engineer with strong project experience. I have developed several similar systems over the past and have quite some experience with RF technology. I can develop the required pro More

$600 USD in 12 days
(0 Reviews)

blue I can provide guidance on available technology and cost. I can provide a product specification defining the functional requirement as well as technical and regulatory requirements. The maximum distance and a More

$500 USD in 10 days
(0 Reviews)

i have more than 30 years in the field of automotive very experience in wiring diagram Relevant Skills and Experience technical trainer for the dealer of Porsche vehicles dealer in Saudi Arabia

$555 USD in 10 days
(0 Reviews)