Measure the value of water flow using water flow sensor and DC water pump 12 V interfacing with Arduino uno

Transcription

1 1

2 2 Measure the value of water flow using water flow sensor and DC water pump 12 V interfacing with Arduino uno A flow sensor is a device for sensing the rate of fluid flow. Typically a flow sensor is the sensing element used in a flow meter, or flow logger, to record the flow of fluids

3 3 SPECIFICATIONS LCD LCD Display Mode: STN, Positive, Transflective Display Color: Deep Blue/ Yellow Green Viewing Angle: 6H Driving Method : 1/16 duty, 1/5 bias Back Light : Yellow-Green LED backlight Outline Dimension: MAX CAUTIONS The LCD panel is made by glass. Any mechanical shock (eg. dropping from high place) will damage the LCD module. Do not add excessive force on the surface of the display, which may cause the Display color change abnormally. The polarizer on the LCD is easily get scratched. If possible, do not remove the LCD protective film until the last step of installation. Never attempt to disassemble or rework the LCD module. Only Clean the LCD with Isopropyl Alcohol or Ethyl Alcohol. Other solvents (eg.water) may damage the LCD. When mounting the LCD module, make sure that it is free form twisting, warping and distortion. Ensure to provide enough space(with cushion) between case and LCD panel to prevent external force adding on it, or it may cause damage to the LCD or degrade the display result. Only hold the lcd module by its side. Never hold LCD module by add force on the heat seal ot TAB. Never add force to component of the LCD module. It may cause invisible damage or degrade of the reliability. LCD module could be easily damaged by static electricity. Be careful to maintain an optimum anti-static work environment to protect the LCD module. When peeling off the protective film from LCD, static charge may cause abnormal display pattern. It is normal and will resume to nomal in a short while. Take care and prevent get hurt by the LCD panel sharp edge. Never operate the LCD module exceed the absolute maximum ratings. Keep the signal line as short as possible to prevent noisy signal applying to LCD module. Never apply signal to the LCD module without power supply.

4 4 Water flow sensor Sensor Type: Hall effect Working Voltage: 5 to 18V DC (min tested working voltage 4.5V) Max current draw: 5V Output Type: 5V TTL Working Flow Rate: 1 to 30 Liters/Minute Working Temperature range: -25 to +80 Working Humidity Range: 35%-80% RH Accuracy: ±10% Maximum water pressure: 2.0 MPa Output duty cycle: 50% +-10% Output rise time: 0.04us Output fall time: 0.18us Flow rate pulse characteristics: Frequency (Hz) = 7.5 * Flow rate (L/min) Pulses per Liter: 450 Durability: minimum 300,000 cycle HARDWARE REQUIRED Arduino Uno with USB cable - 1 Water Flow Sensor - 1 Connecting wire LCD 16*2 Display - 1 Breadboard 400 point 1 Pipe 1 12v DC water pump 1 12V amp adapter 1 Potentiometer 10 k 1 9v battery with snapper 1 Jumper wire (male to male and male to female) 20 pieces each

5 5 SOFTWARE REQUIRED Arduino IDE ((Programmable platform for Arduino boards)you can download it from this link:

6 6 PIN DESCRIPTION 10 k Potentiometer 16*2 LCD shield NOTE Color tone may slightly change by Temperature and Driving Condition. The Color is defined as the inactive/background color

7 7 Symbol External Connection Function VSS Power Supply Signal GROUND for lcm VDD POWER SUPPLY for logic lcm V0 Contrast Adjust RS MPU Register Select Signal RW MPU Read/Write Select Signal E MPU Operation Enable Signal DB0~DB3 MPU Four Low order bidirectional three state bus lines. Used for data transfer between the MPU and LCM. These four are not used between 4 Bit operations. DB4~DB7 MPU Four high order bidirectional Three state bus lines used for data transfer between the MPU

8 8 A LED BKL power Supply Power Supply for BKL K Water flow sensor CIRCUIT DIAGRAM

9 9 Flow sensor Yellow Wire is output and it gives pulses in proportion with flow. Flow Sensor Connections Yellow --- Pin 6 Red V Black --- GND LCD Connections LCD RS pin to digital pin 12 LCD Enable pin to digital pin 11 LCD D4 pin to digital pin 6 LCD D5 pin to digital pin 5 LCD D6 pin to digital pin 4 LCD D7 pin to digital pin 3 LCD R/W pin to ground 1K resistor: One end to ground Another end to LCD VO pin (pin 3) WORKING 1. Blow air or allow water flow through the sensor 2. Observe the reading on LCD or Serial Monitor 3. Readings get updated at every 1 Sec HERE we connect the water flow pump 12 dc motor use for flow the water between the water flow sensor you see the result on lcd 16*2

10 10 CODE Modified by TECHNICAL TEAM, REES52 /* Flow Sensor Connections Yellow --- Pin 6 Red V Black --- GND */ LCD Connections LCD RS pin to digital pin 12 LCD Enable pin to digital pin 11 LCD D4 pin to digital pin 6 LCD D5 pin to digital pin 5 LCD D6 pin to digital pin 4 LCD D7 pin to digital pin 3 LCD R/W pin to ground 1K resistor: One end to ground Another end to LCD VO pin (pin 3) // include the library code: #include <LiquidCrystal.h> // initialize the library with the numbers of the interface pins LiquidCrystal lcd(12, 11, 6, 5, 4, 3); volatile int FlowPulse; //measuring the rising edges of the signal int Calc; int flowsensor = 2; //The pin location of the sensor void setup() { pinmode(flowsensor, INPUT); //initializes digital pin 2 as an input Serial.begin(9600); //This is the setup function where the serial port is initialised, attachinterrupt(0, rpm, RISING); //and the interrupt is attached

11 11 // set up the LCD's number of columns and rows: lcd.begin(16, 2); // Print a message to the LCD. lcd.setcursor(0, 1); lcd.print("flow Meter"); } void loop() { FlowPulse = 0; //Set NbTops to 0 ready for calculations sei(); //Enables interrupts delay (1000); //Wait 1 second cli(); //Disable interrupts Calc = (FlowPulse * 60 / 7.5); //(Pulse frequency x 60) / 7.5Q, = flow rate in L/hour Serial.print (Calc, DEC); //Prints the number calculated above Serial.print (" L/hour\r\n"); //Prints "L/hour" and returns a new line // set the cursor to column 0, line 1 // (note: line 1 is the second row, since counting begins with 0): lcd.setcursor(0, 2); lcd.print(calc, DEC); // print the Flow Rate lcd.print(" L/hour"); } void rpm () //This is the function that the interupt calls { FlowPulse++; //This function measures the rising and falling edge of the hall effect sensors signal }

12 12