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Proximity-Sensor's-batch-indicator-Manufacturer colour sensor- What better way to test a colour sensor then to create a brick sorting robot! After getting my hands on a VCI colour sensor, I first took a stab at creating a robot that could navigate a room and detect colour. There was only one problem, it could not really do what I was hoping for. I was nieve in thinking that I could build this robot and it could detect colours from a distance. After reading the fine print on the provided documentation, I quickly realized that the colour sensor is only capable of reading colours at very close range (~ 1 cm). My bad. Of course, you could still build a robot that uses the ultrasonic or other sensor to get it close to objects, then read the colour… but that’s for another time.

BrickSorter uses this colour sensor to detect the colour of bricks and sort them into a variety of cups. The program is quite simple, gravity and studless beams allow for each brick to slide down the track on its own. when a brick is next, the colour sensor takes a reading (more on this later), the sort motor turns the sort rails to the correct cup, the sort rail motor changes its angle depending if the cup is close or far and finally the kicker motor kicks the brick in motion.

After a lot of fooling around with the cup placement (which seemed to be the hardest part of this project!), I managed to get the sorting pretty much bang on. Of course, the video shows some goofs, but that is mostly due to the small sized cups (its all I had!)… Anyway, I found the sensor to be accurate most of the time, but ambient light still influenced the readings at times and caused for the odd random missorting of a brick. I had to shoot the video about 10 times to get cup placement and sorting goofs workedout.

Capacitive sensors-Capacitive-Sensors-manufacturer detect metallic and non-metallic, solid and fluid materials. They are used for object counting tasks, fill level measurement or for the detection of positions and objects. The functional principle of capacitive sensors is based on the variation of capacitance in the active field of the sensor due to the approach of the target. This active field consists of two electrodes. The design of the electrodes can be adapted to the design of the sensor.

Capacitive sensors have an oscillator. It consists of an RC-oscillation circuit and a sensor-electrode. The oscillation circuit produces a high frequency electrical field. It emerges at the front of the sensor, at the sensing face. When a object approaches the sensor electrode, the capacity of the oscillator increases and it starts to oscillate. The resulting current change is recorded by the measuring unit. If the approach of the object is strong enough, the sensing face switches the output device. The sensivity of the sensor can be adjusted by a potentiometer.

The capacitive sensor has two defined states i.e. the attenuated and non-attenuated states. The sensor is non-attenuated when the distance to the object is large enough that the electric field is not influenced. The state changes to attenuated when the object approaches the real sensing distance and switches the sensor by increasing the capacity. The operating distance depends on the material of the object. The materials can be divided into three different types:


Magnetic sensors An important role of magnetic sensors is temperature measuring and infrared instruments. Magnetic-SensorsElectromagnetic devices are electrified to promote the magnetism. This application was successfully made to temperature measuring devices. Consequently, infrared sensors were born. They are very sensitive to the heat emitted from various particles. In such natural disasters as earthquake, this application is very important because a large number of inhabitants can be saved. They also play an important role in the reception of data. Any very light radiation is able to be sensed and the information about it is sent to the special recipients right away.

One of the most popular magnetic sensor applications is magnetism measuring devices. These devices are widely used for the geophysical research. With the help of these instruments, mines of iron under the ground are discovered. For the archeological purpose, these devices help to discover remains of a city or a ship in the sea.

Besides, magnetism is applied to compasses. The compasses function to show the direction to the north of the globe. These compasses are widely sold on the Internet along with schema bout them.

Magnetic sensor applications also include the detection of objects in a limited space. Based on the magnetism released from all objects, the sensors easily realize the appearance of suspected objects. Nowadays, this application is used at most of the airports. If a traveler carries an ironic object without claiming, the sensors at the airport will inform the authorities soon. Because the airport is surrounded by magnetism, the metal can not keep on its trip into any plane without clear explanation from the traveler. All this actions are for the utmost safety of all the passengers on the planes. Magnetic switches are very helpful underwater. All their actions are only controlled by the magnetism. This application makes the work in the outer space possible because the magnetism bears no influence of the great gravity.