Detection device and object conveying system

An object conveying system, comprising:

• an object conveying device used to transport an object to a predetermined workstation;
• and
• a detection device installed at the predetermined workstation, the detection device detects whether the object is transported to the predetermined workstation, the detection device includes an installation plate, a lever member rotatably installed on the installation plate and rotatable between a first position and a second position, and a sensor installed on the installation plate and detecting whether the lever member is in the second position, the lever member is rotated from the first position to the second position under a pushing of the object when the object is supplied to the predetermined workstation, the lever member can be automatically reset to the first position under gravity when no object is supplied to the predetermined workstation, it is determined by a judgment device connected to the sensor that the object is supplied to the predetermined workstation if the sensor detects that the lever member is in the second position and, if the sensor does not detect that the lever member is in the second position, it is determined that no object is supplied to the predetermined workstation.