Portable automatic escalator speed sensor

The utility model discloses a portable automatic escalator speed sensor, its characterized in that originally test the speed host computer (2) mainly by rotary encoder (8), tachometer wheel (9), go up folding rod (10), round pin axle (11), down folding rod (21), torsional spring (12), base (13), pivot (14), slipmat (15) and spring jackscrew (16) constitute, base (13) are connected through pivot (14) and lower folding rod (21), down folding rod (21) are connected through selling spool (11) with last folding rod (10), can realize clockwisely freely folding, and tachometer wheel (9) are connected on last folding rod (10) top with rotary encoder (8), host computer (2) the folding back of testing the speed is gone up folding rod (10) and is fixed on base (13) convenient to carry, simple operation through spring jackscrew (16), the beneficial effects of the utility model are that originally, the host computer that tests the speed adopts foldingization design, and convenient to carry makes advantages such as a whole