Automatic hardness detection device for table tennis balls

The invention relates to an automatic hardness detection device for table tennis balls. The automatic hardness detection device for the table tennis balls comprises a base, wherein an upright post is arranged on the base, a support is arranged on one end of the upright post, a fixed pulley and a travel switch are respectively arranged on the support, a stay cord is coiled on the fixed pulley, oneend of the stay cord is connected with a standard weight block and the other end of the stay cord is connected with a rotating shaft of a loading motor; the standard weight block is sleeved on a guide rod connected with the base, a disc fixing rod is arranged in the standard weight block, and the disc fixing rod is further connected with a disc; a table tennis ball holder is arranged on the base,and a sensor is arranged on one end of the table tennis ball holder; a turnover mechanism connected with the base is arranged on the other side of the ball holder, the turnover mechanism comprises a step motor connected with t