This design abandons the existing ruler measurement method, adopts wireless measurement, adopts a main body plus four modules design, the main body is the central receiver, and the display: the four sub-modules are named ""-"" ÷ "*" respectively, Put the module on both sides of the measured object to display the length on the display screen. In addition to the basic length measurement, there is also a block generation function. The four modules are placed at the length, width and height of the object. The display will automatically display the length, width, height and volume area of the object, and generate a block diagram. The additional function is the length visualization function, which inputs the known length data, and the module indicator light will change the color to assist the user to adjust the distance between the two modules. The invisible length data is displayed intuitively in front of us. The name of this ruler is a ruler that converts intangible data into a specific visual length. Magnetic charging is adopted between the module and the main body, and the main body adopts wireless charging. At any time when it is convenient to use.

(Apple users can copy the two-dimensional code below to Safari browser to view AR model)
https://raw.githubusercontent.com/HongGong1011/Visible-Rule/91dc147ccca659d3738b664703fd983d480e88d6/Visible Rule .reality