According to the MacRumors website, a patent application file published today by the US Patent and Trademark Office indicates that a new generation of Apple Watch can identify users by monitoring heart rate.
The patent filed by Apple is referred to as "a plethysmographic based user identification system" and describes a method for determining a user's heartbeat biometric signal using a pulse oximeter. The resulting data can be used to identify the wearer's identity and unlock the Apple Watch in a similar way to the Touch ID on the iPhone.
According to MacRumors, the new system works like the existing monitoring system, projecting light onto the user's skin, measuring the light that is absorbed and reflected back, and using this to determine the blood content in the blood vessels. According to the patent application, the data collected by the two photoreceptors can be stored or compared with previously stored information to identify the user.
Children's tables can be classified according to different ways, here are several common ways:
1. Material classification: Children's tables can be divided into wood, plastic, metal and other different types according to the material. Wooden tables have natural texture and beautiful appearance, but need to pay attention to moisture-proof and insect-proof; Plastic tables are light and easy to move and clean, but not stable enough; Metal tables are strong and durable, but they need to be careful against rust.
2. Function classification: Children's tables can be divided into learning tables, game tables, painting tables and other different types according to their functions. Study tables usually need to have writing tables and storage space, play tables need to have enough space and stable structure, and drawing tables need to have adjustable inclines and easy to clean surfaces.
3. Age classification: children's tables can be divided into different types according to their age, such as children's tables, primary school tables, teenagers' tables and so on. Children's tables need to have adequate security measures, primary school tables need to have enough study space and storage space, and teen tables need to have enough stability and personalized design.
In short, the choice of children's table suitable for their children needs to consider various factors, such as material, function, age and so on.
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