Not the same. Lu Ban ruler is also called Ban ruler, door ruler, door light ruler and eight-character ruler. The length of a ruler is 1.44, and the unit of measurement is feet.
The combined ruler is also called a tape measure, and the unit of measurement is centimeters.
The standard size of Luban ruler is 46 cm, with an allowable deviation of 0.5 cm.
There is a Luban ruler in the Palace Museum in Beijing, length: 46 cm, width: 5.5 cm, thickness: 1.35 cm.