Recently, Laser Radar has become very popular. You may not have used it, but you can see it on the road. Lidar (Light Detection and Ranging) is a new technology in smart cars. The principle is very similar to that of bats. Bats use the reflection of ultrasound to locate surrounding objects. Laser Radar uses the reflection of a laser to present a three-dimensional environment. A laser range finder consists of a laser, a receiver and a processor. We all know that light will reflect when it shines on the surface of an object, and so does a laser. When the laser emits light and shines on the surface of an object in space, it will instantly produce a reflection, which the receiver will receive. Since the speed of light is known, the processor only needs to calculate the time it takes for this beam of light to go back and forth to get the exact distance of this point. By giving this beam of light angle information in the spatial coordinates, the three-dimensional positioning of this point can be obtained. This is the TOF, or time-of-flight, and time-of-flight ranging method.

Figure: Lidar 3D Point Cloud         Source: LinkedIn

This picture is a point cloud picture of laser radar. If you look closely, you will find that the point cloud is made of individual points. The collection of these points presents details such as pedestrians, crosswalks, vehicles, road signs in the distance, trees, and even the thin wires in the air can be captured. Such a uniform and regular point cloud can restore the environment around us and become the real eyes of smart vehicles in driving. It is because of the powerful performance of laser radar that many car companies have adopted it as a necessary sensor.

Laser Radar has promoted the development of self-driving vehicles, which will bring significant changes to our lives. When we sit in the car and don’t have to worry about driving, the time we free up will bring countless economic benefits to foresighted companies. Imagine if your parents didn’t have to put their hands on the steering wheel when driving you to school in the morning, what would you do together in the car? Make an omelette together or make a glass of fresh orange juice?

Mobile payments have transformed our lives, a fact acknowledged by many. It is changing the world, ushering in a new era of payment revolution.

Apple’s mobile payment service allows users to turn their mobiles into wallets in their daily lives to achieve fast and secure payments. Of course, Alipay is the most advanced mobile payment at present.

The consumer uses the mobile billing option during checkout at an e-commerce site to make a payment. After two-factor authentication involving the consumer’s mobile number and a PIN or one-time password (often abbreviated as OTP), the consumer’s mobile account is charged for the purchase.

When making a mobile payment, a collection code or payment code will be required. Collection code: It is a QR code that remains unchanged over a long period. Others could scan the QR code to pay you.

Payment code: It consists of a barcode and a QR code, which updates every minute. The purpose is that when the merchant’s special device scans the code, the payment is completed. It is equivalent to using a point-of-sale (POS) machine to swipe a card for payment.

Figure: Collection code        Source: PayLands

Mobile payment is convenient for making contactless payments on the go, speeds up tap-and-pay transactions, and enhances security through tokenization. The future of mobile payments is expected to encompass digital wallets, voice payments, facial recognition, and other advanced technologies. Advanced technologies like 5G and 6G will further improve mobile commerce’s speeds and user experience.