Introdution
Preparations
Let's try
Let's know about how to make the device
Now let's put the devices in the box that we prepared
Problem
Improvement point
PROJECT
Preparations
Let's try

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Published May 8, 2018 © GPL3+

Corridor Collision Protection Device

This device prevents collisions in the hallway.

IntermediateFull instructions provided7 hours894

Things used in this project

Hardware components

Arduino Nano R3

Solderless Breadboard Half Size

Jumper wires (generic)

Resistor 100 ohm

LED (generic)

Ultrasonic Sensor - HC-SR04 (Generic)

9V battery (generic)

9V Battery Clip

Software apps and online services

Arduino IDE

Story

Introdution

We often collide with others at the intersection of corridors. Especially if you run in the corridor and collide with people coming from the side, it can lead to a big injury. This device will help prevent collisions and injuries in the corridor by detecting and informing people coming from the corridor blinds in advance.

Preparations

Arduino Nano x1
Half-size breadboard x1
Jumper wires x8
Resister 100 ohm x1
LED x1
Ultrasonic Senser x1
9V battery x1
9V battery Clip x1
wood box x1

Let's try!

Let's know about how to make the device.

The signal is sent to Arduino Nano to let LED send out the light breadboard and various sensors according to the code.
The trig pin of the ultra sensor is responsible for the output and the eco pin for the input.
Ultra senser plays an important part of this device.
If we just go through the range of an ultra-sensor, it senses our movements and sends out signals.
The signal is sent to Arduino Nano to let LED send out the light.
the operation method is shown below.

Now let's put the devices in the box that we prepared.

Problem

Because it was in an ultrasound sensor and same box of LED lights, the LED light could not be notified to the person coming from the opposite corridor after the ultrasound sensor detected the person running.

Improvement point

We're back to Project 2 to solve this problem.

This time, we separated the ultrasonic sensor and the LED lighting to create boxes for each. We also changed the existing system, which only informed the risk in one direction, so that it could inform the risk in both directions.

PROJECT Ⅱ

Preparations

Arduino Nano x2
Half-size breadboard x2
Jumper wires x16
Resister 100 ohm x2
LED x2
Ultrasonic Senser x2
9V battery x2
9V battery Clip x2
wood box x4

Let's try!

We also changed the existing system, which only informed the risk in one direction, so that it could inform the risk in both directions.

We made one more box and added each arduino.

Unlike attaching an ultrasonic sensor to a traditional box, it was installed outside the box so that the sensor rings at the proper timing.

Two complete boxes were attached to both walls, enabling detection in both directions.

Watch the video below to see how the corridor collision protection device works.

Code

Corridor Collision Protection Device

int trigPin = 3;
int echoPin = 2;
int ledPin1 = 8;
int buzzerPin = 6;
long distance;
long duration;

void setup() {
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
pinMode(ledPin1, OUTPUT);
pinMode(buzzerPin, OUTPUT);
Serial.begin(9600);
}

void loop() {
  ultra();
  led();
  Serial.println("distance = " + String(distance));
}

void ultra(){
digitalWrite(trigPin, LOW);
delayMicroseconds(2);

digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);

duration = pulseIn(echoPin, HIGH);

distance= duration*0.034/2;
}

void led(){
if(distance<=130){
    digitalWrite(ledPin1, HIGH);
    tone(buzzerPin, 1500, 1000);
    delay(3000);
}
else if(distance>130){
    digitalWrite(ledPin1, LOW);
    noTone(buzzerPin);
}
else{
    digitalWrite(ledPin1, LOW);
    noTone(buzzerPin);
}
}