Week 9 (FYP 1)

DESIGN PROJECT HARDWARE AND SOFTWARE

This week I have been meet with co-supervisor, Prof. Zulkifli to discuss about project design and software. Considering with my project tittle which is Gas Leakage detector, Prof Zulkifli suggest to do about LPG Gas. For project hardware, Prof Zulkifli also tell me about Nodemcu LPG Gas Sensor. He ask me to study about nodemcu and LPG Gas sensor because it more easier for me to understand what to do in next step.  Besides thats, for my FYP project, Prof Zulkifli also tell me there is no a simulation. 

PROJECT HARDWARE

I have purchased some equipment handled by my co- supervisor to buy which I would like to use in this project. Tools are not too expensive to buy and are easy to find. Here , I want to attach some information about this equipment. 


1.  MQ-6 LPG Gas Sensor

                                                           MQ 6 LPG Gas Sensor

Product Description:

The MQ-6 gas sensor uses a gas sensitive material with a lower conductivity of two tin oxides (SnO2) in clean air. When the combustible gas exists in the sensor, the conductivity of the sensor increases with the increase of the concentration of flammable gas in the air. A simple circuit is used to convert the electrical conductivity into an output signal corresponding to the gas concentration. MQ-6 gas sensors have high sensitivity to propane, butane and liquefied petroleum gas, and have better sensitivity to natural gas. The sensor, which detects a wide range of flammable gases, is a low-cost sensor for a wide variety of applications.

Module features:

·        It adopts high quality double panel design, with power indication and TTL signal output indication;

·         It has DO switch signal (TTL) output and AO analog signal output;

·   The TTL output valid signal is low. When the output is low, the signal light is on, and the microcontroller or relay module can be directly connected

·         Analog output 0~5V voltage, the higher the concentration, the higher the voltage.

·         The sensitivity of propane, butane, LPG and LNG detection is better.

·         There are four screw holes for easy positioning;

·         Product size: 32*20*22mm

·         With long service life and reliable stability

·         Fast response recovery feature

Product parameter:

·         Product type: semiconductor gas sensor

·         Standard packaging: Black Bakelite

·         Test gases: liquefied petroleum gas, isobutene, propane, LPG

·         Detection concentration: 300-10000ppm

·         Loop voltage: ≤24V DC

·         Heating voltage: 5.0±0.2V AC/DC

·         Heating resistance: 31Ω±3Ω

·         Heating power: ≤900mW

·         Sensitive body surface resistance: 2KΩ-20KΩ（in 2000ppm C3H8）

·         Sensitivity: Rs (in air) /Rs (1000ppm isobutene) ≥5

·         The concentration gradient:≤0.6

·         Temperature and humidity: 20±2℃，65%±5%RH.

2. NodeMCU

                                                     

NodeMCU

Features:
ESP8266 full IO mouth leads directly download without reset.
A great set of tools for the development of ESP8266.

Specification:
Chip Module: CP2102
Working temperature: -40 ℃ ~ + 125 ℃
Power input: 4.5V ~ 9V (10VMAX), USB-powered
Current: continuous transmission: approx. 70mA (200mA MAX), Standby: <200uA
Size: approx. 45 x 25 x 6mm/1.77 x 0.98 x 0.23''
Weight: approx. 6g

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