Low cost 3D sensor in slow light
2020-06-02
According to relevant reports, the research team of Yokohama National University in Japan has made a 3D sensor with small size and no need to move mechanical equipment by using "photonic crystal". It is reported that the equipment made by this method has the characteristics of small size, no need for mobile devices, cheaper and more flexible, especially for mobile applications such as autopilot.
 
As the "eyes" of devices, sensors can receive many useful information, which is an essential part of each device. However, what is the difference between 3D sensors and ordinary sensors? This week's Changhong Internet of things will give you a detailed analysis of "what exactly is 3D sensors".


the picture is from "东方 IC"
 
Generally speaking, common sensors, including temperature and humidity sensors, harmful gas sensors, smoke sensors, etc., belong to 2D sensors, that is to say, they output strength and receive return information at x, Y2 axes, such as some acceleration sensors, geomagnetic sensors and optical sensors, output signal strength to x, y, Z3 axes and receive return information, and monitor 3D environment Control, which is also the difference between 2D sensor and 3D sensor.
 
However, both ordinary sensors and 3D sensors have different application fields, which need to be selected according to different application scenarios.
 
In the surveillance computer vision system, the three-dimensional forehead length scene information is mainly divided into image segmentation, object detection, object tracking and other computer vision applications, which provide more possibilities, and the depth image as a universal three-dimensional scene information expression has been widely used in the industry.
 
General sensors are mainly composed of three parts: sensitive components, conversion components and measuring circuits. 3D sensors will also have more complex structure, and will be equipped with different components and devices according to different application scenarios. Therefore, 3D sensors will cost a lot more than general sensors, and most manufacturers for cost control, if the application scenario is full Enough, most will use ordinary sensors to save costs.
 
This time, the research team of Yokohama National University of Japan uses "photonic crystal" to produce optical 3D sensors with smaller volume and lower cost. Because of the cost advantages, it will provide more diversified choices for customers, and its more prominent cost advantages will provide more rich and diversified choices in emerging application fields such as driverless driving.