1 / 23

Liquid hand soap automatic dispensing docking system with alarm

Liquid hand soap automatic dispensing docking system with alarm. Group 32 Jung Il Yoo , Stanley Kim, Ho Chan Joo ECE 445 Senior Design May 2, 2011. Introduction. No need to refill the soap. No need of cleaning. Can easily replace liquid hand soap. Controls amount of soap.

siyavash
Download Presentation

Liquid hand soap automatic dispensing docking system with alarm

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Liquid hand soapautomatic dispensing docking systemwith alarm Group 32 Jung Il Yoo, Stanley Kim, Ho Chan Joo ECE 445 Senior Design May 2, 2011

  2. Introduction • No need to refill the soap • No need of cleaning • Can easily replace liquid hand soap • Controls amount of soap • Saves the amount of soap used

  3. Features • Can recognize toilet usage and notify the user to wash hands • Can dispense soap according to estimated hand size • Can dispense soap according to user’s demand

  4. System Figure

  5. System Overview • Hardware • - Power Supply(9V Battery X 4) • - Arduino X 2 • - Transmitter/Receiver • - PIR sensor X 2 • - Capacitive Touch Sensor IC X 2 • - Motor • Software • - PC control for transmitter/receiver • - PC control for capacitive sensors

  6. System Overview Battery PIR Sensor Transmitter Microprocessor 1

  7. System Overview Battery Touch Sensors Receiver PIR Sensors Microprocessor 2 Buzzer Motor Battery

  8. Hardware Overview • Power Supply(9V Battery) - Model : LM7805AC - Takes 9V from the battery and outputs 5V

  9. Hardware Overview • Microprocessor - Arduino Uno : Transmitter, PIR sensor - Arduino Mega : Receiver, Capacitive touch sensors, PIR sensor, Motor

  10. Hardware Overview • PIR Sensor - Model : SHARP 2D120X - Supplied Voltage : 5 V DC - Output Voltage : 2.5V DC - Detection Length : 6.35cm

  11. Hardware Overview • Transmitter/Receiver - Operating Frequency : 315MHz - Sampling Frequency : 2000 bps

  12. Hardware Overview • Toilet Usage Detection • - Triggered by PIR sensor • - MCU sends out signal (4.8V DC) • - Transmitter transmits the signal

  13. Hardware Overview • Buzzer - Operating voltage : 6V DC - Controlled by MCU 2 - Voltage from MCU2 : 2.5 V DC - Sound intensity differs by the input voltage

  14. Hardware Overview • Capacitive Touch Sensors - Two B6TS-04LT Capacitive Touch Sensor ICs - 5 Copper 2.5 X 5 cm Touch Sensors - Send inverted outputs to Arduino

  15. Hardware Overview • Motor • Model : PITTMAN GM8721 • Supplied voltage : 14.12V DC • Internal resistance : 11.3 ohms • Power consumption : 11.83W • 90 rpm

  16. Software Overview • Transmitter/Receiver • - Sends and receives signal • Capacitive Touch Sensors • - Enters manual mode when one sensor touched • - Enters hand size estimation mode when two or more sensors touched

  17. Success • Able to replace hand soap easily • Toilet usage detection system • Dispensing according to estimated hand • size • Dispensing according to user’s demand

  18. Challenges • Calibration • - PIR sensor sensitivity • - Touch sensor sensitivity • Incorporation • Trouble combining the parts together • Insufficient power • Motor requires high supplying voltage • - MOSFET and driver is required for • protection of the circuit

  19. Tests • Motor Test Supplied Voltage : 14.12V (two 9V battery in series) - Running motor graph - Motor stuck graph

  20. Tests • Capacitive Touch Sensor Output is low when pressed

  21. Tests • Output to motor from Arduino

  22. Tests • Transmitter 2000 bps 1000 bps After several tests, 2000bps(sampling frequency) works better

  23. Recommendation • Use LCD to display message to the user • Find more power efficient components • Find power efficient pumping system

More Related