Conclusion and Future Recommendation for my project...

Automatic smoke absorber machine is type of machine that have own function where to save the environment by reducing the air contamination that come from open burning process. while I mention for open burning process, it means the smoke that come from open burning process does not have heavy particles in the smoke compared to industry smoke; for example smoke from factory.

so that, for future recommendation, if this machine want to apply to the factory, the contain of water that want to be mist out to filter the smoke must have some chemical particles to react with the chemicals smoke, so that, neutralisation process will happen and the smoke will be neutralized and the air contamination will reduce by that process.

other than that, filter in the Automatic smoke absorber machine can be replaced with some filter more compact. for example I want to filter the smoke that contain with the fully with oil, which means the particles in the smoke have oily and it cannot be filter easily by using sponge or water because the density of oil and water are different. here, I suggest to filter the smoke using compact dust and shaping it in filter type. so the oil particles can be filtered with the type of filter.

my conclusion is, I had achieved my objectives where this machine can reduce the air contamination and Automatic Smoke Absorber Machine have been done and can be apply to personal home especially.

INDUSTRIAL DAY on 8th November 2012...

today is the day that every final year student including me waiting for, where they need to present their work to assessor and public. today is very nervous day for me. my assessor are NHMY( Nur Hidayah Mohd Yunus) and HMD ( Hisham Mat Desa). below is the picture of me with my project

that is me with my project

on that day, time I need to be assess from 10 am  until 12.30 noon.

my assessor are very nice to me.

my presentation day are being well to me.

and I got my satisfaction for my Industrial Day.

re-design the poster for INDUSTRIAL DAY...

before this I already design my poster but it is not fulfil my satisfaction and I alter it back to give something more creative and attractive. below is the design of my new poster..

here it is my new poster...colour of my poster more attractive compared before.

the content of my poster also have been alter to make the contents is compact with the important information.

testing the project

after finish up the project, it's time to test the functionality the system of the project. Alhamdulillah, the project  running as expected  before. To do some backup while presentation day, I added new input and combine the sensor input and switch input by using OR gate which means if either one of the input running, the process will continue run usually. What I means here, in the hall, the students are not allowed to used the firing material because it can activate the alarm system in the hall, so that the switch function to give input for the system without doing burning process so supply smoke to the MQ2 sensor.

figure above is the image of backup input switch on the control system board

the figure shows the AC fan running out while the input switch pressed ( or smoke sensor send the output) and at the same time, water pump 1 and water pump 2 will pumped the water to supply source for water mist system. Three system are work together while get the input signal.

the three system are work about 20m=20seconds delay time.. after that the green bulb will blow up to shows the smoke are clean about 90% because last stage sensor did not give any output, which means the smoke on the last stage cannot be detected and it means the smoke in clean situation.

from the estimation, the result shows like below:-

that the result that i can get from the estimation of my "Automatic smoke absorber machine".

real image of my complete machine

on the post before, I've shown my incomplete "Automatic smoke absorber machine", but on this post, I will show off my real image of my complete machine. Below are the image:-

Automatic smoke absorber machine on the front view with the water tank

on the back view of machine

control system board stay under the machine, surface on the water tank

on the side view ( last stage) where exhaust fan located and behind the exhaust fan had sensor where functioning to sense the quality of air for the last stage.

all the part of my machine are completed, so it can be test before present it on Industrial Day on 8th November 2012.

alter the PLC program...

in the post before, I've put my PLC program, but while running the programme, it's not fulfil the specification for my main objective. So that, the programme have been alter by adding edge triggered wiping relay and remove the on delay from the programme.

Edge triggered wiping relay Short description

 An input pulse generates a pre-set number of output pulses with a defined pulse/pause ratio (re-trigger able), after a configured delay time has expired.

above is the programme that have been altered by adding edge triggered wiping relay where the pulse for the red line is about 20m which equal to 20 seconds.

above is the last result output while the programme run. after the 3 system function simultaneously ( water pump 1, water pump 2, exhaust fan) about 20 seconds, the last output will get out  with the green color where shows the smoke at the last stage are not dirt, if the smoke on the last stage still dirt, last sensor will shows the red color of LED. the red LED are not programme through PLC Logo because the sensor was in separate system. It just to show the smoke still dirt or not.

added new simple circuit to project

smoke sensor MQ2 used DC supply to operate,the output from sensor cannot be entered to PLC Siemens Logo because that things used  AC supply to operate, so that I need to convert output from MQ2 to AC form. I need to combine the comparator circuit with relay to the output of MQ2, then the input for Siemens Logo can be operate normally in AC form.

above is the circuit for the comparator design. the output from the comparator circuit will be connected to relay and the output from the relay will connect to the input for the PLC Logo. To construct this circuit, it needs amplifier OP07 with the variable resistor and 1k ohm resistor.

Voltage comparator is a circuit which compares two voltages and switches the output to either high or low state depending upon which voltage is higher. A voltage comparator based on opamp is shown here. Fig1 shows a voltage comparator in inverting mode

In non inverting comparator the reference voltage is applied to the inverting input and the voltage to be compared is applied to the non inverting input. Whenever the voltage to be compared (Vin) goes above the reference voltage , the output of the opamp swings to positive saturation (V+) and vice versa. Actually what happens is that, the difference between Vin and Vref, (Vin – Vref) will be a positive value and is amplified to infinity by the opamp. Since there is no feedback resistor Rf, the opamp is in open loop mode and so the voltage gain (Av) will be close to infinity. So the output voltage swings to the maximum possible value ie; V+. Remember the equation Av = 1 + (Rf/R1). When the Vin goes below Vref, the reverse occurs.

So that, the output from the comparator circuit can be supported by the AC voltage because the voltage gain  close to infinity.