Design, implementation and characterization of a radio link in ISM band at 2.4Ghz
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1 Design, implementation and characterization of a radio link in ISM band at 2.4Ghz By Juan Santaella Hernández Supervisor: Francisco Jiménez Molinos
2 Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 2 INDEX INTRODUCTION DEFINITIONS OBJECTIVES DESCRIPTION DESIGN AND IMPLEMENTATION
3 INTRODUCTION Teaching innovation project: New Tools for Learning of Basic Techniques of Measurement in the Laboratory of Analogic Electronic and RF Systems Development OBJECTIVE Development of new instruments with an educational purpose Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 3
4 Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 4 INTRODUCTION Development basis: Transceiver CC2510 (Texas Instrument) Teaching innovation project premise fulfilment: Measure tools learning RF systems development Great characteristics: Low cost 1.20 per unit CONCLUSION: An ideal device to develop short range wireless systems Low power consumption 0.3 µa in an inactive state Small size
5 DEFINITIONS Radio link Transmission and reception sets necessary to send a signal between nodes via radio Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 5
6 DEFINITIONS ISM BAND at 2.4Ghz Internationally reserved frequency bands for the use of radiofrequency in industrial, scientific and medical fields. Free use, depending on the geographical zone. Respecting the permitted transmitted power levels Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 6
7 Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 7 DEFINITIONS Transceiver Device able to operate as: TRANSMITTER METHOD Several common radio units used DISADVANTAGE No simultaneous tasks RECEIVER Not possible to send and receive at the same time
8 OBJECTIVES Design, implementation and characterization of a radio link in ISM band at 2.4Ghz CHAPTER 1 Description Study of CC2510 transceiver CHAPTER 2 Design and implementation Implementation of a microcontrolled wireless system to measure distance and temperature Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 8
9 Description General Properties Radio Programmable data rate up to 500 kbaud Programmable output power Frequency range: MHz MCU 8051 Microcontroller Memory 8/16/32 kb programmable flash memory CC2510Fx 1/ 2/ 4 kb RAM Peripherals Timers Programmable DMA module ADC Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 9
10 Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 10 Description DEVELOPMENT TOOLS (HW) CC2510DK SmartRF04_EB 2X SmartRF04_EB 2X CC2510EM + CC2510EM
11 Description DEVELOPMENT TOOLS (SW) IAR Embedded Workbench Program Environment Code designed for the MCU SmartRF Studio RF measures optimized CC2510 direct access to all registers SmartRF Flash Programmer CC2510 memory programmed Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 11
12 Description MEASURED SIGNAL STRENGTH RSSI Indicates signal strength DN018 (Data sheet) Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 12
13 Description MEASURED SIGNAL STRENGTH OBJECTIVE Broaden the area betweeen 0 and 10 metres. WHY? 1 Our application will work within this range 2 Our kit will be optimized (on a power consumption basis) Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 13
14 Description MEASURED SIGNAL Parameters (SmartRF Studio) 1) Packet Lenght 10 Bytes 2) Packet Count 200 3) Preset Data-rate Kind of modulation (10 KBaud, 250 KBaud, 500 KBaud) 4) Output Power Transmitter poower -20 dbm (intermediate), +1 dbm (maximum) Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 14
15 RSSI (dbm) RSSI (dbm) Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 15 Description MEASURED SIGNAL STRENGTH RESULTS RSSI (-20 dbm) Kbaud -250Kbaud 500Kbaud RSSI (+1 dbm) Kbaud 250Kbaud 500Kbaud Distancia (m) -60 Distancia (m) CONCLUSION 1)RSSI value is influenced by output power 2) RSSI value is not influenced by Data-rate
16 Design and implementation CHAPTER 2 Implementation of a microcontrolled wireless system to measure distance and temperature General Description Transmitter Receiver Data Sent packet acquisition valid reception Distance and Temperature ADC Received data processing Data sending visualization by using RF Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 16
17 Design and implementation Levels SOFTWARE MCU program design Control radio operation Enable communication between both units Transmitter Enable sensor reading HARDWARE Radio link building between two boards CC2510Fx Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 17
18 Design and implementation SOFTWARE LEVEL Transmitter flux diagram INICIO CONF DE PARÁMETROS Modo Oscilación Cristal Bit-Rate 10kBaud Canal 2.42GHz Modo Transmisor CONSTRUCCIÓN PAQUETE DE ENVÍO TRANSMISIÓN Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 18
19 Design and implementation SOFTWARE LEVEL Receiver flux diagram INICIO CONF DE PARÁMETROS Modo Oscilación Cristal Bit-Rate 10kBaud Canal 2.42GHz Modo Receptor MODO RECEPCIÓN RECEPCIÓN PAQUETE MOSTRAR VALORES mostrarvaloresdist() mostrarvalorestemp() SI BOTÓN PULSADO? NO Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 19
20 Design and implementation HW LEVEL SENSORS Distance sensor Temperature sensor RECEIVER TRANSMITTER Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 20
21 Vo (V) Vo (V) Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 21 Design and implementation HW LEVEL SENSORS IR Distance sensor SHARP GP2D120 Analog output Effective measure range : 4-30 cm Calibration CALIBRADO GP2D120 Rango Válido de Actuación 3 3 Rango Válido Polinómica (Rango Válido) 2,5 2, ,5 1,5 1 0, , Distancia (cm) D(Vo) = 0,9619Vo 6-10,211Vo ,122 Vo 4-107,77Vo ,91Vo 2-125,31Vo + 57,778 Cal_Superfice_Oscura Distancia (cm)
22 Tensión Salida (mv) Tensión Salida (mv) Design and implementation HW LEVEL SENSORS Temperature sensor LM335 Analog output Easy to calibrate Low cost Calibration OFFSET CALIBRADO EXPERIMENTAL LM Vo(T) = 10 T f( x) f 2900 y( x) Vo(T) = 10 T Offset Teórica Experimental Teórica x 50 x 50 Temperatura (ºC) Temperatura (ºC) Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 22
23 Design and implementation HW LEVEL RECEIVER Functions RECEPTION Valid pack reception VISUALIZATION Data visualization Unit SmartRF04_EB Card Suitability CC2510EM Reliability Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 23
24 Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 24 Design and implementation HW LEVEL TRANSMITTER Functions ACQUISITION Temperature and distance acquisition TRANSMISSION Data transmitted to receiver Unit SmartRF04_EB Card Suitability CC2510EM Reliability
25 Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 25 Design and implementation FINAL SYSTEM (1 ST prototype)
26 Design and implementation HW LEVEL TRANSMITTER Design of an autonomous transmitter unit. OBJECTIVE To create a system to replace the SmartRF04_EB board The CC2510EM will be used Radio circuit FUNCTIONS Able to support CC2510EM unit Power supply to CC2510 Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 26
27 Design and implementation HW LEVEL AUTONOMOUS TRANSMITTER UNIT Tool used to develop the design PADS de Mentor Graphics. Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 27
28 Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 28 Design and implementation HW LEVEL AUTONOMOUS TRANSMITTER UNIT PCB Layout
29 Design and implementation HW LEVEL AUTONOMOUS TRANSMITTER UNIT Making process Preparing Insolation Development Final result chemical and chemical productsetching processing Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 29
30 Design and implementation HW LEVEL AUTONOMOUS TRANSMITTER UNIT Assembly Autonomous process transmitter Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 30
31 Diseño e implementación HW LEVEL AUTONOMOUS TRANSMITTER UNIT Final System The SmartRF04_EB board is replaced by the autonomous transmitter Diseño, implementación y caracterización de un radioenlace en la banda ISM de 2.4GHz 31
32 PFC Juan Santaella Hernández Design, implementation and characterization of a radio link in ISM band at 2.4Ghz 32
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