How does the reading pen realize reading? What is the principle?

Point reading pen principle

A Sensor (infrared photosensitive) + MCU + OID algorithm + special paint printing that reflects infrared light. This is the most basic software and hardware architecture of a reading pen! Simply put, it is a signal reading device + memory card + processing chip + There are coded reading materials + pronunciation equipment. The OID algorithm is a two-dimensional optical identification code that identifies different content through different combinations of codes. To put it simply, the key lies in the two-dimensional optical identification code + the reading pen that can recognize the code.

Reading pen schematic diagram

The tip of each reading pen is a photoelectric identifier. The reading pen scans the QR code information on the book through the pen tip and sends it to the CPU for processing. If the CPU recognizes it successfully, the reading pen will scan the QR code information from the book. The pre-stored sound files are selected from the memory of the reading pen, and the sound is emitted by the earphones or speakers; if the CPU recognizes the error, the earphones or speakers will emit a sound that cannot be recognized, or prompt the user to change to other teaching materials.

It can be seen that the most important core component of the reading pen is the CPU, which is the chip, followed by the photoelectric recognition and memory. Of course, the book is also an indispensable part of the reading pen, because the book must contain information that can be identified by the photoelectric recognizer. QR code.

Seeing this, some friends may ask, why is it that reading pens are so expensive? A pen can cost as little as four to five hundred yuan, or as much as a thousand yuan. It turns out that it also has a CPU integrated into it.

The CPU used in the reading pen is an embedded circuit chip. Its function is to read and convert the QR code information and then select the existing sound corresponding to the QR code in the memory.