Automatic bed load sand adding method and device for sediment model test

The invention discloses an automatic bed load sand adding method and device for a sediment model test, and relates to the technical field of sediment model tests, and the technical scheme is characterized in that the method comprises the steps that the thickness and width of bed load sediment conveyed through sediment conveying are obtained; determining a first curve of the sand adding amount along with time change; the sand adding amount is converted into the sand conveying speed of the sand conveying belt; according to the first curve and the sediment transport rate, a second curve of the sediment transport rate changing along with time is obtained; and the second curve is converted into a power curve changing along with time, and the sand conveying belt is controlled to operate according to the power curve. By means of the sand adding method, the driving power of the sand conveying belt can be regulated and controlled according to the requirement for the sand adding amount, the conveying speed of the sand