The application discloses a sand outlet detection device and method of a sand mold 3D printing equipment, and belongs to the field of
foundry 3D printing. The device comprises a sand outlet part, and further comprises a
visual detection part fixedly connected to the inside of the sand outlet part. The
visual detection part comprises two grooves symmetrically arranged on the inner wall of the sand outlet part, a
light source and a camera fixedly connected in the two grooves respectively. The lower end of the sand outlet part is connected with a
vibration detection part. In the application, the
visual detection part converts the sand curtain falling in the sand outlet part into a contrast image with bright contrast through the shielding relationship between the sand and the
light source, so that sand outlet detection is realized. The sand passing through the sand outlet part falls on the
vibration detection part, the
vibration detection part identifies the
impact energy through a sensing part, and sand outlet detection is realized through the vibration
signal. The two detection
modes are used to realize sand outlet detection of the sand outlet, are heterogeneous and redundant, can effectively realize
complementation, eliminate the detection blind area, and greatly reduce the false negative rate or
false positive rate caused by a single sensor.