Week - 4

Washing Machine

It is one of the heavy load home appliances, uses water and wash the clothes. But their is also dry cleaner and ultra-sonic cleaners.

Early days, laundering by hand involves soaking, beating, scrubbing and rinsing dirty textiles which involves human energy. Handelling and maintain clothes quality and colour is difficult due to apply to scrubbing and beating clothes may loose colour .And also while rinsing and drying under sun the thread quality due to which the life of ctextile degrades. Thus, to reduce some human effort this machine got invented.

1. Manual Washing
2. Machine washing

• Semi Auto-mated washing machine- This machine has two containers and involves some human efforts in it such as transfering the clothes between container from washing basin to drying basin.
• Auto mated washing machine-One container is enough for all the operation. Due to this automatation can be done, if two containers are their and automatation is difficult. Single container can able to do all the and operation(soak, wash, rinse, drying) controlled by the processor.

Automated Washing Machine

This majorly reduces the human effort and the automation reduces the time consumption as in all other cases because these automatic machine are completely reduces the time consumption. Just user need to provide all the connection such as power and water supply along with dumping the clothes and detergents. Machine will load the water and uses the detergent from the detergent compartment.

1. Soak-Process which the involves dipping the clothes in detergent water to remove dirt from clothes. So the motor gently rotate the clothes in the medium that helps in dirt to not settle back to the clothes.
2. Wash-This is the major process which has major impact on the dirt clothes to completely remove the dirt by vigorous rotation in clockwise and anti clockwise. Thus, helps in removing the major part of dirt.
3. Rinse-For this process water used in washing process need to remove and fresh water need to be add back. All this are controlled by the processors. After adding the fresh water, again motor need to run such that remove the left over dirt and that water also need to be removed.
4. Dry-In this process clothes need to rotate at high speed due to centrifugal reation heavy clothes are held by the drum and rest water droplet left out in the clothes are drain out of the drum due to less weight of droplet.
5. Finally processor will control all the above operation along with gives the warning such low water flow, over weight.

State Flow

Condition:

1. If the power supply is available, the system gets activated
2. If the Water supply is not available, stop the process & indicate through LED
3. Soaking time should be 200s followed by Washing time of 100s.
4. Then rinsing happens for next 20s & dryer runs for 50s.

Chart and Explaination

Explaination

1. Supply check-Checking the supply switch in ON or whether supply is provided.
2. Water filling-Checks the water inlet and fills the water tank. Incase water inlet is closed or low water flow the process terminate.
3. Soaking and Washing-Starts the time counter accordingly(For soaking 200s and for washing 100s)when counter ends timer resetting. When Soaking complets timer reset then washing counter starts after 100s status changed washing stops.
4. Drain Water-After washing water should drained out then again water must refill.
5. Rinsing-Similarly to the washing settings, time counter starts for 20s and status updated and the water let out throungh drain block.
6. Drying-This final stage of the washing clothes as mentioned in operation drying runs as the counter starts and after 50s counter resets
7. Timer resetting and Status Update-Setting the counter to zero and according to the next step status need to be updated.
8. Terminate-Incase of Low water flow process should terminate according to the given condition. Finally after the drying it goes to terminate.

Result:

Water Check-If low water flow process will terminate indicated will glow. If Water flow is good water starts to fill and water level indicator glows.

Soaking-When the water is full machine under operation glows, the soaking glow and timer starts the period is displayed in the dashboard scope.

Washing-After the soaking period over washing period starts displayed in the graph and the same is glown.

Drain Water-After washing water washing glow off and water level reduces and level indicates the same.

Rinsing-Water is again filled with fresh water and Rinsing starts to glow and the period is shown in the scope.

Drying-After water let out (drained out indicated in water level indicator) drying started drying period starts and drying light glows.

Terminate-After all the operation complete machine under operation stops glowing all the operation stops glowing.

Transmission (Gear selection)

A transmission is a machine in a power transmission system, which provides controlled application of power. Using gear and gear trains to provide speed and torque conversions from roatating power source to another device according to the output requirement. Transmission means drive train including clutch, gear, differential and final drive shaft.

Most commonly used in motor vehicles, according to the road requirement gear multiples the torque and divide the speed. But for the drivers to deciding the gear and clutch operation bit difficult for them in heavy traffic condition. To reduce the time for manual operation to judge the gear number atleast display the require gear number that helps the driver to operate it easily as gear asistant.

Selection of Gear condition depends on the present vehicle speed as below.

Presnet Speed Range(kmph) Gear

0 to 15 1

16 to 25 2

26 to 40 3

41 to 60 4

Above 61 5

State Flow

To implement the gear selection number according to the present velocity define the range for the each gear and then check the velocity wheathet lies inside that range or not as implemented as below.

Steps:

1. Initially set the gear to neutral i.e Gear number=0.
2. Initially velocity check should done parallel not in series because initially gear selection need to be define first.
3. Then, the velocity check will run in series, because we already know the present gear number so no need to check all the velocity condition. Just check the down gear or up gear. This reduces the complex operation.
4. But while transmission gear shifting every time gear should goes to the neutral gear untill or unless the velocity does not lie in that range. So creating that condition while exiting the block gear number set to zero.
5. This check will continue untill the velocity is feeded to the state flow.

Building velocity feeding block

Using the repeating sequence generator, time period is define using range defining condition. Considering the one hour journey and to get the velocity random integer function is used to get random speed value of the vehicle of ranging (0-->100kmph). But at the 0sec and the at the end time velocity set to zero this shows the start and stop condition of the vehicle respectively. And other values are defined using the rani(100,1,11)

Funtion randi()

Used to generate the random integer values of the speed. (1,11) defines the row matrix or vector. 100 defines max limit. 11 different values ranging between 0 to 100 kmph.

Result

1. To see the total one hour operation dashboard scope is used one to represent the velocity of vehicle and other to represent the gear number.
2. To see some artistic circular gauge is used to see the present velocity and the gear number represented on the same gauge.
3. For 62.15 kmph value the below output in recorded.

As in the scope that gear number changed to 4th to 5th gear. As given in condition velocity above 60kmph gear 5th need to display the same is dispalyed. Hence, the ouptut of dispalying the gear number is acording to the given condition. Finally gear detection made successfully working for any given random sequence as below.

By oberserving all the ouput the gear change is continuous and well judge according to the present speed of the vehicle.