Claims:Claims:
1. An arduino based device for real time LPG gas cylinder monitoring with automatic cylinder booking alert system, along with LPG leakage and fire detection Using GSM technology.

2.In addition of claim 1, claim 2 is, the net weight of the LPG gas inside a cylinder will be shown on a LCD display in KG unit along with percentage wise conversion of LPG weight and how many hours the gas stove will run by the remaining gas.
3. In addition of claim 2, claim 3 is, with the usage of LPG when gas weight reaches the threshold value, the device initiates to send an automatic generated SMS to the registered mobile number mentioning the status of the cylinder within 30 seconds along with displaying the status on LCD display.
4. In addition of claim 3, claim 4 is, if LPG leakage and fire are sensed by the respective sensors, the device initiates to send automatic generated SMS to the registered mobile number mentioning the leak and fire incident within 30 seconds along with buzzer sound and shows the alarm massage on the LCD display. , Description:The main aim is to make such a device which measures the LPG gas weight inside the cylinder and this weight is shown on a display (Fig-2) in a convenient way to the user and when the weight reaches a threshold value an alert SMS (fig-2, number-15) for booking new cylinder is sent to the user via GSM module so that the consumer can avoid cylinder providing delay related issues and can get new cylinder in time. The empty cylinder weight and gas regulator weight can be avoided by arduino coding. Hence the LPG gas weight can be determined. The weight is measured by the Load cell (fig-1, number-6) in combination with it’s amplifier (fig-1,number-7). Here bending beam load cell is used to measure the weight .The load cell is designed in such a way that a trolley like platform for keeping the cylinder on the load cell has been made. Hence the real time LPG gas weight will be shown on the display(fig-2,number-10&11) continuously. LPG consumption is based on the gas stove (burner) size or sizes of the appliance, as some have more than one burner. All gas appliances are rated by the manufacturers for gas consumption and those are expressed in either MJ/hr (Mega joule/hour) or BTU/hr (British Thermal Unit/hour), depending on the country.

Calculating Consumption per Hour:

LPG-propane unit of measure MJ BTU
1 Litre 25 23,700
1 KG 49 46,452
1 pound 22.8 21,594

To calculate LPG-propane consumption per hour for gas appliance requires arithmetic. By taking the MJ/hr or BTU/hr from the manufacturer and dividing it by the relevant value in the table above.
If someone has a gas stove that consumes 5MJ/hr, to determine the amount of liquid LPG it would consume, divide 5 by the values in the MJ column of the consumption conversion chart.
5÷25 = 0.2 litre per hour
5÷49 = 0.1 kg per hour
5÷22.8 = 0.23 pounds per hour
So, for 14.2kg (standard LPG weight for Indian household cylinder) LPG gas one 5MJ gas stove will run about {(1/0.1)×14.2}= 142 hours.
The burners on a particular cooktop could vary from 5MJ for the small burner to 9MJ for a medium burner, 12MJ for a large burner and 15MJ for a wok burner.
In the process of making this device one 5MJ burner has been used for testing the prototype device and all the data and outputs are correlated with this 5MJ burner. If one 5MJ burner is used, someone will get 142 hours of cook time. In most of the household 5MJ and 9MJ burner are used. This device can be made compatible with multiple burners along with 9MJ, 12MJ and 15MJ gas stove very easily just by modifying the arduino code.
When the LPG weight is 14.2kg (i.e. cylinder is full), percentage wise it will be 100% and the gas stove will burn approximately 142 hours. When the LPG weight is 1.42kg, percentage wise it is 10% and the gas stove will burn approximately 14.2 hours. In this device this weight is considered as the threshold limit. When this threshold limit is reached an automatic generated alert SMS for refilling the cylinder will be sent to the user cellular phone through GSM module so that the user can act accordingly. For sending SMS alert, GSM module SIM900A (fig-1,number-9) is used due to it’s performance and efficiency.

Another aspect of this project is the safety of the consumers. There is always a safety issue regarding the gas cylinder as the cylinder contains flammable substance under high pressure. There are different accidental cases caused by gas leakage like leakage and fire. These leakage problems arise due to some reasons like manufacturing defect of gas cylinder, defect in pipe or in regulator. The aim of this device is also to monitor for liquid petroleum gas (LPG) leakage to avoid major fire accidents and also ensuring safety to the consumers. For detecting LPG leakage MQ5 gas sensors (fig-1, number-1) are used. Those sensors will be set in convenient place for detecting the gas leakage and fire sensors (fig-1, number-8) are used for detecting fire in unwanted place inside the kitchen. A 16*2 LCD display (fig-1, number-5) shows the weight of the gas in KG unit as well as percentage wise and how many hours the gas stove will run by the remaining gas, will also be displayed. The alert SMS in case of LPG leakage and fire will also be shown on the display (fig-2, number-13&14). A buzzer (fig-1, number-3) is connected to the device so that along with SMS, by hearing the buzzer sound in case of leakage and fire, the people of the house can take necessary action to be safe.

This device is proposed to be Arduino based hence Arduino UNO R3 (fig-1, number-2)is used. So the aim of the project consists of three parts, those are: Real time LPG weight sensing with SMS alert for booking, leakage detection and with SMS alert, Fire detection with SMS alert. For implementing those requirements we are proposing to use a 40kg beam load cell of model L6D, an Arduino UNO R3, a GSM module of SIM900A, a 16*2 digital display, a buzzer and several LPG and Fire sensors. A 100k potentiometer (fig-1, number-4) is also connected to the display. The objectives of the project is to provide the users a cheap, efficient and reliable system for a convenient and safe kitchen.