Imagine – you don’t have to go directly to a hospital or a public health center to measure a patient’s heart rate remotely and in real time. You can prevent accidents when blinded by the sun, remotely control various devices using brainwaves without physical movement, or even measure ultraviolet rays to be careful when going out. This is not a story that will happen in the far off future. It is a story that has, in fact, already started in the IoT era. In this article, we will introduce some sensors of the IoT era.
- heart rate sensor
This sensor measures the heart rate (BPM) and can be used as a heart rate monitoring device. When it works with Bluetooth and Wi-Fi, it can be linked to your smartphone to manage your health more effectively. The link below is an example of the Arduino that blinks an LED according to a heartbeat.
This fitness band measures the heart rate and is commercialized using Bluetooth or Wifi.
- Ultrasonic Sensor
The Ultrasonic sensor works by calculating the distance from the object according to the difference in time between two eyes transmitting and receiving each other. Since wavelength is short as frequency is high, the resolution in the direction of the distance is accurate and measurements precise. The link below is an example that uses an ultrasonic sensor to measure the distance to an object, then connects it to the cloud server using ioShield-A (based on W5500), which allows the user to remotely locate the object.
There are ultrasonic canes for the people who are visually impaired as commercialized products.
- Ultraviolet Sensor
One of the things that can cause various diseases such as dermatitis, skin cancer, and blackspots is ultraviolet rays. T0 combat these harmful rays, the ultraviolet sensor helps to measure levels. The following link is an example of measuring ultraviolet rays using a UV sensor.
- EMG Sensor
Electromyography (EMG) is the recording of currents from muscle contractions and abnormal currents during rest. It is useful for diagnosing functional abnormalities rather than the structural specificity of muscle. It is widely used in medical research, rehabilitation medicine, sports science, and ergonomics. The following link is an example of using an EMG sensor.
- Electroencephalogram Sensor
Electroencephalogram (EEG) refers to the regular electrical impulses from human brain cells and the sensor that measures them is called the EEG sensor. With the EEG sensor, devices can be controlled wirelessly according to the user’s mood, thought, or condition. The link below is a project to prevent drowsiness by measuring sleepiness using an EEG sensor.
In this article, we looked at helpful sensors and how or where they can used. Although not mentioned in this article, various products can be created by using the above sensors and combining it with IoT. For example, if you install an ultraviolet sensor outside of your home and update the ultraviolet dose in the cloud through wireless communication, we can measure the amount of ultraviolet light before we go out of the house! If it is installed outside the crop facility, it can also help to manage crops. How will sensors transform the IoT era? I anticipate it carefully.