Unsupported browser

You are using an outdated browser. Please upgrade your browser to improve your experience.

Sign up for
an Award

Participate with your entry in one of our professional or student awards.

Sign up for an award

Sign up for
a Profile

Create your own profile and publish it in the iF WORLD DESIGN GUIDE.

Sign up for a profile

Learn more:

(free of charge)

Present your project for free and win your share of EUR 50,000 in prize money.

Publish your project

Trudle Ruler / Tools

Trudle Ruler
Trudle Ruler

This is designed to innovate a traditional way; the method used measures with combination off wheel and ruler. By rolling the body of wheel, the mechanical transmission of the perimeter precisely calculated and shown on the screen. Being both multifunctional it is easy to calculate and measure both flat and curved surfaces


Dalian Nationalities University

Dalian Nationalities University
Dalian, China

Xue-fei Liu
Di Fang


Dalian Nationalities University

Dalian Nationalities University
Dlian City, Liaoning Provice, China

Jing-hao Ren Jin-jin Wang Yan Piao