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Which one is more reliable? Between the ultrasonic sensor and the infrared sensor?

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Engineers from China Smart Sensor Co., Ltd. pointed out that with the development of electronic technology, modernization, modern information, military, transportation, chemistry, environmental protection, energy, marine development, remote sensing, aerospace and other scientific technologies, the demand for sensors The volume is increasing day by day, and its application has penetrated into various sectors of the national economy and people's daily cultural life. Selecting sensors in these applications is challenging for any project. The performance of the system depends to a large extent on the reliability of the sensors and other components of the application. Let's take a look at which ultrasonic sensor and infrared sensor are better?

In order to determine which sensor is suitable for the project application, there are several factors to consider when choosing a sensor.

1. Accuracy - The proximity of the reading to the true distance.

2. Resolution - The smallest reading or reading that can be reported.

3. Accuracy - The smallest reading that can be read repeatedly and reliably.

How do ultrasonic and infrared sensors work?
1, the working principle of ultrasonic sensors

Ultrasonic sensors work by reflecting sound waves and measuring distance. A sensor can detect sound waves from other nearby ultrasonic sensors, and if there are objects in front, they will be reflected back. The sensor detects these waves and measures the time between sending and receiving these sound waves. The distance is then estimated by the time interval between the sensor and the object.

Ultrasonic sensors are largely insensitive to obstacles such as light, dust, smoke, mist, steam, and lint.

Ultrasound is not as good as infrared when defining the edge of the area. Ultrasonic sensors are used for level measurement, object detection, distance measurement, anti-collision detection and pallet inspection. Ultrasonic sensors are used to increase operational efficiency and provide additional safety in manufacturing facilities. This is one of the main factors driving the demand for ultrasonic sensors worldwide.

2, the working principle of infrared sensor

The infrared sensor works by reflecting light waves. Infrared light is reflected from objects or emitted from an infrared remote control or beacon. Infrared sensors are also used to measure distance or proximity. The reflected light is detected and then the distance estimate between the sensor and the object is calculated.

Infrared sensors do not work in the dark while ultrasonic sensors work in dark environments. Infrared is easier to detect a brighter surface than a dark surface because the sensor does not detect a darker surface. Infrared sensor values ​​typically fluctuate under varying lighting conditions. As the object passes within this range, the light waves detect these objects and reflect their presence back to the sensor. Their wavelength is less than the wavelength of the microwave. Although they are capable of detecting motion, they can also measure the heat dissipation of an object.

In summary, Eric from China Smart Sensor Co., Ltd. believes that choosing a sensor depends entirely on your application. Infrared sensors have many limitations, such as the inability to use them in sunlight due to interference. It can be very difficult for outdoor applications or dark indoor applications. Ultrasonic sensors work with sound waves to detect obstacles from a variety of factors. If reliability is an important factor in your choice of sensor, ultrasonic sensors are more reliable than infrared sensors. If you are willing to reduce the reliability of your cost, infrared sensors are ideal for your application.

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