SPECIFICATIONS

Brand Name: VAOHM

High-concerned chemical: none

Material: Mixture

Origin: Mainland China

Output: Digital Sensor

Theory: Capacitance Sensor

Type: Optical-Electronics Sensor

Use: Humidity Sensor

is_customized: Yes

The Infrared obstacle avoidance sensor module (FC-51) is the combination of two infrared sensors. First one is an infrared transmitter and the second one is an infrared receiver. The infrared transmitter emits the infrared light through the LED. This infrared light has a certain frequency and when it is reflected back after the collision of any obstacle or object then this light is received by the infrared receiver. Then this infrared obstacles avoidance sensor tells the system, that someone is present in this particular area.

It can easily detect the object from 2 to 30 cm area and its detection angle is 35o.

This infrared obstacles avoidance sensor module has been currently used in so many applications such as in robotic industry, automobile industry and security purposes, etc. It is easily available in the market or online shop.

Pin Out

This infrared obstacle avoidance sensor module consists of three pins:

1. VCC: This is the pin that supplies power to the IR sensor module. 3.3 to 5 Volts DC voltage is applied to turn on this sensor

2. GND: This is the ground pin which is connected to the input ground.

3. OUT: This is the output pin of this sensor which is connected with any type of controller. When an obstacle is in front of the sensor, this pin is in a LOW state.

The IR sensor module also consists of other components such as an IR emitter LED which emits the infrared light, an IR receiver LED which receives the light after the collision with any object, a power LED which turns on when this sensor is powered up, distance adjuster, through this, the user can easily adjust the range or distance of sensor by increasing or decreasing the potentiometer resistance. Lastly, the obstacle LED which turns ON whenever an obstacle is detected.

Working Principle of Infrared Obstacle Avoidance Sensor Module

The working principle of this infrared obstacles sensor module is very simple. As this sensor consists of one IR transmitter and one IR receiver, therefore, the main work is done by them.

When an IR transmitter emits the infrared light during the presence of an object, then some portion of this infrared light is reflected back to the IR transmitter after the collision with the object. So, the reflected portion of the infrared light is received by the IR receiver. This reflected portion has some light intensity and based on this intensity the output of this infrared obstacle avoidance sensor module is defined. In other words, this light intensity is inversely proportional to output voltages. This means that when the intensity is increased then the resistance of this module is increased therefore the output voltages are dropped. Similarly, when intensity is decreased then resistance is decreased so the output voltages are increased. These output voltages are received by the controller from OUT pin of this module. Hence when an obstacle is detected, the OUT pin goes LOW. otherwise it stays HIGH.