ADM User Manual - for end users -
ADM Technical Description RFID-LSCAN Revision History Table Revision Changes Since Previous Revision Rev1 This is the initial release of the document File: ADM UserMan.
ADM Technical Description RFID-LSCAN TABLE OF CONTENTS 1. OVERVIEW 6 1.1 Main Characteristics 6 1.2 Physical concept 7 2. MODES OF OPERATION 8 3. FUNCTIONAL ARCHITECTURE 8 3.1 LF Exciter 3.1.1 Operation 3.1.2 Excitation Distance 8 8 9 3.2 UHF Receiver 3.2.1 Receive Distance 3.2.2 Tag message filtration 10 10 10 3.3 GSM Modem 10 3.4 Test Tag 10 3.5 USB Ports 10 3.6 LEDs 3.6.1 Power 3.6.2 Busy 3.6.3 GSM 10 11 11 11 3.7 Power Supply System 3.7.1 Battery pack 3.7.
ADM Technical Description RFID-LSCAN LIST OF FIGURES Figure 1 – ADM Concept _____________________________________________________________________ Figure 2 - ADM Assembly ____________________________________________________________________ Figure 3 - ADM Main Unit and Battery Pack _____________________________________________________ Figure 4 – LF Excitation Zone _________________________________________________________________ Figure 5 – Door Slot Installation ____________________________________________
ADM Technical Description RFID-LSCAN Definition of terms Tag Collection Period The time (typically 24 hours) interval between two consecutives scheduled data SMS transmissions Read Time Table A table that defines the frequency of tag reading cycles within 24 hours SMS Time Table A table that defines the time of the day when the data SMS is sent Tag Registration First read of a tag in a tag collection period Acronyms ADM GSM LOS RTT RTC SIM SMS STT TCP UHF UTC File: ADM UserMan.
ADM 1. Technical Description RFID-LSCAN OVERVIEW ADM is a remote data collection device used to provide accurate last mile mail delivery measurements. The ADM is placed inside a mailbox or above a mail door slot. When a test letter (letter that contain a tag) is placed in the proximity of an ADM, the tag inside the envelope is excited and its unique ID is read. The ID and the time of read are then transmitted to a backend application over the GSM network using SMS.
ADM Technical Description RFID-LSCAN Power - Li-Polymer rechargeable cells Environment - IP64 with battery pack - IP20 w/o battery pack - RoHS compliant 1.2 Physical concept The ADM consists of a main unit and a detachable battery pack. The ADM physical concept is illustrated in Figs. 2-3 Figure 2 - ADM Assembly GSM LED Busy Power LED LED Charge LED Main Unit ON/OFF Switch Battery Pack Figure 3 - ADM Main Unit and Battery Pack File: ADM UserMan.
ADM Technical Description RFID-LSCAN Main physical characteristics • Push-in push-out (double click) battery pack lock mechanism • ON/OFF slide switch • Reset button 2. MODES OF OPERATION The ADM has two modes of operation: a) normal mode (power saving), b) continuous mode: a) In normal mode, the unit is in sleep most of the time. It wakes-up regularly, based on a Read Time Table (RTT). The RTT specifies the frequency of reads (e.g. every five minutes) during a specific time interval (e.g.
ADM Technical Description RFID-LSCAN it is echoed back on UHF. In this way, the RFID system is able to determine which ADM excited the tag. 3.1.2 Excitation Distance Mode of Operation Power saving and continuous normalexcitation modes Continuous lowpower excitation mode Table 1 – Excitation Distance Conditions Min 35cm (see Figure 6) ADM installed on metallic surface, tag in front of the unit o (±45 angle), all tag orientations, max.
ADM 3.2 Technical Description RFID-LSCAN UHF Receiver The UHF receiver is a narrowband FSK receiver operating in the 433.92 MHz frequency band. 3.2.1 Receive Distance Table 2 – UHF Receive Distance Value Conditions Min Typ. No obstacles, any tag orientation 10m 3.2.2 Max Tag message filtration Only the first read of a tag in a TCP is stored (“tag registration”). However, the ADM can be programmed to also store the last read of a tag in a TCP (i.e.
ADM Technical Description 3.6.1 RFID-LSCAN Power When activated, the power LED is solid white if the power system is OK. If an uncharged battery pack is inserted, the power LED flashes 3 times/second (provided that the internal battery is not discharged as well). 3.6.2 Busy When activated, the busy LED (blue) is on while the unit is busy (e.g. booting, reading tags, sending and receiving SMS). 3.6.
ADM 3.7.2 Technical Description RFID-LSCAN Backup battery The main unit is equipped with a backup battery that allows the unit to continue operate for a limited time without the battery pack. The backup cell is only used when the battery pack is depleted or not connected. Table 4 – Backup Battery Characteristics Conditions Min Power saving mode, 3 days excitation every 5min, one SMS/day, max. LF field Battery Life (per charge) Continuous mode, one 16 hours SMS/day, min.
