Description:Field of Invention
The present invention relates to the field of Electronics & Automation Engineering and Home Automation. Specifically, it falls under the category of Smart Appliances and Safety Devices. This invention is a smart LPG stove device designed to automatically turn off the gas supply when specific conditions are detected. It aims to prevent accidents caused by the overflow of milk, tea, or boiling liquids and the burning of food due to human negligence. The invention is particularly beneficial for households and commercial kitchens.
Background
In conventional kitchens, cooking on LPG stoves requires continuous human supervision. Often, individuals forget to monitor the stove, leading to overflowing milk or burnt food. This not only results in wastage of food but also poses safety hazards. While some modern induction stoves have timers and automatic shut-off features, there is no widely available smart solution for traditional LPG stoves.
Therefore, there is a need for an innovative, cost-effective, and efficient device that can automatically turn off LPG stoves when necessary. The present invention addresses this need by providing a smart LPG stove device with dual functionality: an IR sensor-based detection mode and a timer-based automatic shutdown mode.
Summary
The smart LPG stove device consists of an Arduino microcontroller, IR sensors, geared motors, and a motor driver. It operates in two primary modes:
1. Sensor-Based Mode: The IR sensor detects the foam of boiling milk or other rising liquids. When the sensor detects foam, it triggers the microcontroller to initiate the motor movement, pressing and rotating the LPG stove knob to switch it off. An LED and buzzer provide real-time feedback during the process.
2. Timer Mode: Users can set a pre-defined time using a push button. Once the set time elapses, the microcontroller commands the motors to turn off the stove automatically.
The system also includes a rechargeable battery pack with overcharge and discharge protection, ensuring long-term usage and reliability. The motors return to their default position after the stove is turned off, making the device ready for its next use.
The Smart LPG Stove Device is an intelligent safety system designed for traditional LPG stoves. It prevents common kitchen hazards such as overflowing milk, boiling liquids, and food burning due to negligence. The device is built using an Arduino microcontroller, IR sensors, geared motors, and other electronic components. It features two operating modes—Sensor-Based Mode and Timer Mode—for flexible control. In Sensor-Based Mode, the IR sensor detects foam formation and triggers automatic shut-off. In Timer Mode, the user sets a predefined cooking time, after which the device powers off the stove. A buzzer and LED system provide real-time feedback during operation. The device uses a rechargeable lithium-ion battery with BMS protection for reliability and safety. A voltage booster maintains consistent power for the motors. After shutdown, the motors return to their original positions for reuse. Push buttons are provided for mode selection and timer input. The system includes alerts for low battery and ensures protection against overcharge/discharge. Adjustable connectors make it compatible with various stove designs. A manual override option ensures user control in emergencies. The IR sensor is finely calibrated for accurate detection. This innovation offers an affordable and effective home and commercial kitchen safety solution.

Description
The smart LPG stove device is constructed using the following components:
• Arduino Uno R3: Serves as the microcontroller to process input from sensors and execute motor control commands.
• IR Sensor: Detects foam formation during boiling.
• Buzzer and LEDs: Provide visual and audio alerts during operations.
• Motor Driver and Geared Motors: Facilitate the pressing and rotating of the stove knob.
• Push Buttons: Allow mode selection and timer adjustment.
• Rechargeable Lithium-ion Battery: Provides the necessary power supply with protection via a 3S BMS module.
• Voltage Step-Up Booster: Maintains optimal voltage levels for motor operation.
• Plastic Frame and Connectors: Provide a sturdy structure for the device.
Mode Selection and Operation:
• Mode 1: The IR sensor detects foam, signaling the Arduino to turn off the LPG stove. The buzzer and LED indicate the completion of the operation.
• Mode 2: Users set the required time using the push button. After the timer expires, the motors automatically turn off the stove.
, Claims:We Claim:
1. A smart LPG stove device comprising:
o An Arduino microcontroller for processing inputs and controlling outputs.
o An IR sensor configured to detect foam formation during boiling.
o A motor driver connected to two geared motors, one for pressing the stove knob and the other for rotating it to the off position.
o A buzzer and LED for providing operational feedback.
o A user interface with push buttons for mode selection and timer adjustment.
o A lithium-ion battery pack with a BMS module for reliable power supply.
o A voltage step-up booster for maintaining optimal operational voltage.
2. The smart LPG stove device as claimed in claim 1, wherein the first mode is activated through the IR sensor to detect foam and automatically turn off the LPG stove.
3. The smart LPG stove device as claimed in claim 1, wherein the second mode operates using a user-defined timer to turn off the LPG stove at a specified time.
4. The smart LPG stove device as claimed in claim 1, further comprising an automatic motor reset mechanism to return the motors to their default position post-operation.
5. The smart LPG stove device as claimed in claim 1, wherein the device includes safety features such as overcharge and discharge protection for the battery pack.
6. The smart LPG stove device as claimed in claim 1, further comprising a visual and audible alert system using a buzzer and LED to notify users during the stove shut-off process.
7. The smart LPG stove device as claimed in claim 1, wherein the device is compatible with various stove designs by utilizing adjustable connectors and flexible mounting mechanisms.
8. The smart LPG stove device as claimed in claim 1, further comprising a low-battery detection system to alert the user for timely recharging.
9. The smart LPG stove device as claimed in claim 1, wherein the system is designed to provide manual override functionality, allowing users to regain manual control of the stove in emergencies.
10. The smart LPG stove device as claimed in claim 1, wherein the IR sensor is calibrated to minimize false detections and ensure precise operation during milk boiling or food preparation.
Dated 11th day of April, 2025