Wireless/Web Based Ocean-Observation Using Sensor Network with Data Logger and Monitoring System(Fuse Link System)
“Wireless/Web Based Ocean-Observation using Sensor Network with Data Logger and Monitoring System” is designed to analyze ocean under water parameters.The system is made up of tightly closed capsule like float (100% water Proof material).To analyze under water observation, the system is immersed in deep sea water.This immersed float system is pulled down by a weight to deep sea. When the Float is pulled down,the system collects information’s(temp,pressure etc) through 4 different sensors and stores in built-in memory until a particular pressure of water is reached. When particular pressure is reached,the weight is cutoff by a mechanism and fall down and the Float alone comes up to the surface of sea and transmits collected information to the nearby ships through Wireless and to Web Servers through built in GPRS, if signal is strong.
System Details
- This is LPC1768 cortex_m3 based data logging and monitoring system
1. LPC1768 cortex m3 mother board with SD_MMC CARD, Wireless & GPRS.
2. Capacitor changer board with relay
3. 12v, 13 Ah small Battery
4. 4 nos. of sensors (4 to 20 Ma)
- The above items are accommodated in a Cylindrical Float of 15cm Diameter and 26cm Height.as shown below.
- The Sensors dips are taken out at the bottom of the Cylindrical Float along with a Fuse Link Hook in which a weight of ½kg iron Rod is Hanged to Pull Down the entire Float in to the deep of Sea Water.
- The float is designed for 100% water proof.
- When the Float System moves down to deep water, the Battery operated mother board collects information from Sea Water every seconds(Programmable) and Store the Information in the SD-MMC Card built-in.
- The built in Capacitor is Charged simultaneously up to 340 V DC and maintains the value using PWM pulses.
- The Pressure Sensor senses the Sea Water Pressure and the Pressure Value is compared with Set Pressure Value (Programmable).When the Set Pressure Value and real time Pressure Value is equal ,the built in relay is switched ON, which in turn short the Capacitor Voltage through the Fuse Link.
- The Fuse Link is now Burned Off and the weight is detached from the Cylinder Float and fall down.
- Now the Float Comes up to the Sea Surface, and transmit “Alert Messages” to the ships which are Equipped with Wireless Receiver Unit on the Sea Surface.
- Following the Reception of “Alert Messages “,the Receiver Units start chat with the Float System and receive the Collected Informations.
CORTEX-M3 Mother Board
Specification - Built in LPC1768 Cortex_M3 32 bit MicroController
- Built in 4Nos of 22bit ADC MCP3551
- Built in Signal Conditioner
- Built in 4Nos of 3 pin RMC Connectors to accommodate Sensors with 4 to 20ma Signals
- Built in SD-MMC card to store information upto 4GB
- Built in XBEE S2B wireless module to form Zigbee network with routers in sorrounding Ship’s Receiver Routers on the sea surface.
- Built in opto coupler to send PWM pulses to relay board
- Built in 4pin RMC to communicate with the relay board
- Built in USB for ISP program
- Built in 5V and 3.3V Regulator
Function of Mother Board
The mother board has built in USB Port interfaced with UART0.This USB Port is used to receive Program hex Code through ISP during programming. When program is executed it can be used for application.
The mother board has built in XBEE Pro wireless Module interfaced with UART1.The LPC1768 – M3 communicates with receiver Router Units in destination. The built in SD-MMC Card is interfaced with SSP0 Port in which sensor information is stored. The built in 4 nos.of 22bit ADCS are interfaced with SPI Port of LPC1768 – M3. 4Nos of sensors informations are received through the powerful Signal Conditioner and the 4 ADC channels and processed.
The built in power supply Receives 12V DC from a 13 AH Battery and converts into 5V and 3.3V using regulators. Built in DS1307 RTC is used by LPC1768 – M3 for time schedule operations.The LPC1768-M3 sends PWM pulses and control signal to relay board through built in opto couplers.
Relay Board
Specification- Built in 1:10 transformer with controller IC to charge capacitor up to 340v Dc
- Built in Relay with com & no contact
- Built in opto coupler to send capacitor changed volts to mother board
- Built in magnetic Read Switch to Switch ON/OFF Battery Voltage
Function of Relay Board
This relay board consists of 300V, 9A, 2.5MF capacitor charger circuit. This charger CKT consists of a “MIDCOM32052 Fly Back Transformer”. This 1:10 Fly Back Transformer is interfaced with LT3750 Charger IC. This IC charges a Special type Capacitor “CORNELL DUBILIER 7P252V360N082” with the help of PWM pulses sent from mother board. This IC is supplied with 12V DC. The capacitor is charged upto 300-340V DC and maintained constant to fuse the fuse link
