RAIN at the jewelry counter

Kevin Berisso, Ph.D.

Automatic Identification Lab

Dec 10, 20202:50pm

Education

Tech TransferAdvocation

Zoom GS1 US

Kevin Berisso

Jonathan Gregory

Custom app

+

192.168.1.22

Alien TOT command

• Turn on Threshold(minimum power required to get a response from the tag)

•Units: dBm

•Range: 50-315 (-1 if tag can’t be read)

•Multiple read attempts recommended (reading is frequency dependent)

Alien TOT command

• Turn on Threshold(minimum power required to get a response from the tag)

•Units: dBm

•Range: 50-315 (-1 if tag can’t be read)

•Multiple read attempts recommended (reading is frequency dependent)

192.168.1.22

0.3” spacer

Antenna Setup

Magnets

•Neodymium

•3/8” O.D.

•0.06” thick

0 13 µT

1 117 µT

2 259 µT

3 400 µT

4 526 µT

5 625 µT

6v 217 µT

6h 585 µT

Qty Strength

Test Protocol

• Tags• 5 tag types• 5 tags each

•Magnets/strength• No magnets, 1-5,

3 magnet assembly,2 positions

0.47” (12mm)

Test Protocol

• Tags• 5 tag types• 5 tags each

•Magnets/strength• No magnets, 1-5,

3 magnet assembly,2 positions

0.47” (12mm)

Intentional Test Protocol Limitations

Being tested• Impacts of static

magnetic field

• NF RAIN RFID performance

• NF targeted tags (small form factor)

Not being tested• Tag to tag performance

• Electronically generated magnetic fields (motors)

• All tag formats

Results (for all tags)Magnets Average Max Min Std Dev

0 159.0 304 80 46.421 159.3 272 75 40.202 159.3 278 75 41.433 159.5 277 73 40.144 159.2 263 76 38.525 160.8 290 80 41.77

6h 229.8 292 133 38.856v 171.1 315 83 46.79

Results – By Magnetic Configuration

50

100

150

200

250

0 1 2 3 4 5 6h 6v

dB

m

Magnets

Results – By Tag

100

120

140

160

180

200

220

240

260

280

0 1 2 3 4 5 6h 6v

dB

m

Magnet Configuration

a

b

c

d

e

Tag

Typ

e

Conclusions

• Failed to show a significant difference

•Within tag variations were larger than expected

50

100

150

200

250

300

1 2 3 4 5

TOT

(dB

m)

Tag – no magnets

a

b

c

d

e

Surprises

Tag

Typ

e• Slight drop in TOT for 1-5 magnets on some tags

•No impact of increased number of magnets

100

120

140

160

180

200

220

240

260

280

0 1 2 3 4 5 6h 6v

dB

m

Magnet Configuration

a

b

c

d

e

Thank you for Attending

Presentations will be available on-line soon. You will receive an email with a link when they are available.