Introduction:

               The Project is titled "SANITIZER SPRAYER". The main purpose of our project is to decrease the spread of various viruses which are causing numerous new diseases by spraying sanitizer to a person who enters into crowded and occupied places like cinema theatres, Auditoriums, and Classes, etc. Whenever a person is entering a room our machine will detect the person and starts sprinkling sanitizer for a particular period of time and turned off likewise it sprays sanitizer to all the persons and helps in maintaining safety and hygienic conditions in crowded places.

 Motivation:

                  COVID-19 has been our main motivation in doing this project named "SANITIZER SPRAYER". In this pandemic, lots of people lost life's even after taking precautions we went through it what was wrong after all safety precautions and we came to the conclusion that the majority of people are wearing masks but the majority of people are not washing their hands properly and touching different objects outside and then rubbing those hands to face causing viruses to enter themselves. We thought if we keep a SANITIZER SPRAYER at every entrance of a crowded place then it helps in decreasing the count of people infecting from viruses.

Objective

              In this COVID-19 pandemic wearing masks and washing hands has been a key to eradicate the virus and stay safe. Our Objective for taking this project is as Coronavirus is spreading maximum at crowded places so to decrease the spread of viruses as much as we can at crowded places we thought SANITIZER SPRAYER would be helpful to decrease the spread of the virus. The main objective is to keep people safe in crowded places by keeping them clean and making the places hygienic.

Analysis and Design:

                  The project titled “SANITIZER SPRAYER” is designed to reduce the effect of viruses on public health. This system is placed at the gate of any entrance (home, rooms, auditoriums, halls). It can detect whether a person is entered or exited through the place. When a person is entered the sprinkler sprays the sanitizer for a particular period and it will be turned off and when a person is exited there could be no task that should be done by the system.

                      In order to design this system, two ultrasonic sensor modules are used for detecting whether the person is entering or exiting, a motor is used to spray the sanitizer, and FPGA is used to test the functionality of the system.

Two modules are placed on either side of the entrance. Let S1 be the sensor outside of the entrance and S2 at the inner side of the entrance. If the first S1 is set as 1 and then if S2 is set as 1 it is treated as ENTRY and similarly if the first S2 is set as 1 and then if S1 is set as 1 it is treated as EXIT.

                     Initially, sanitizer is stored at a tank. Sprinklers are arranged at the top of the entrance. Whenever ENTRY is detected by the system the motor of the sprinkler gets turned on it will be sprayed for a particular time. The time to be sprayed can be declared by the user. And after that particular time period, the switch of the motor gets turned off. This process is repeated a number of times whenever the system detects ENTRY.

                      The particular time that sanitizer should be sprayed can be manually set by a user and when the storage of sanitizer is empty in a tank it should be manually filled by the user.

Implementation

      Implementation details

                   To implement the logic of the system verilog hardware description language is used. Verilog is a HARDWARE DESCRIPTION LANGUAGE (HDL). It is a language used for describing a digital system like a network switch or a microprocessor or a memory or a flip−flop. It means, by using HDL we can describe any digital hardware at any level. Designs, which are described in HDL are independent of technology, very easy for designing and debugging, and are normally more useful than schematics, particularly for large circuits.  

                    Verilog, standardized as IEEE 1364, is a hardware description language (HDL) used to model electronic systems. It is most commonly used in the design and verification of digital circuits at the register transfer level of abstraction. It is also used in the verification of analog circuits and mixed signal circuits, as well as in the design of genetic circuits. In 2009, the Verilog standard (IEEE 1364-2005) was merged into the System Verilog standard, creating IEEE Standard 1800-2009. Since then, Verilog is officially part of the SystemVerilog language. The current version is the IEEE standard 1800-2017.

The inputs in the system are  S1 and S2 which describe outputs of the two ultrasonic sensor modules. Here count describes the particular time when sanitizer should be sprayed. R describes the ON/OFF of a red light which intimates a person to stop for spraying the sanitizer. G is a switch of LED that describes that person can be entered. SWITCH is the key that turns ON and OFF of the motor which is a key role for spraying the sanitizer.

Conclusion:

As technology is growing rapidly in today’s world newly emerging viruses such as SARS-COV-2 show a great impact on public health and the world economy.  

As we know that PREVENTION IS BETTER THAN CURE. Sanitizers could be useful which is more effective at killing microorganisms which can cause viruses than soap and water. Hence we hope that our project titled SANITIZER SPRAYER could be useful in preventing the growth of newly emerging viruses.

Future Scope:

    The extension of this system can be the ‘displaying of count’ which might be useful for the owner to know the count of people who entered the place. And this can be extended in a way that owner can restrict the entering of people by displaying on the screen that the maximum limit has reached.