Control device and control method of faucet device, and faucet device

A control device of a faucet device, comprising:

• a transmission antenna that transmits a radio wave;
• a reception antenna that receives a reflected wave of the radio wave that hits a fluid and is reflected by the fluid;
• a calculator that calculates a signal intensity distribution of the reflected wave for each arrival angle and arrival distance;
• a determinator that determines whether a supply condition and a stop condition of the fluid are satisfied, and outputs a supply signal or a stop signal based on a determination result;
• and
• a control circuitry that controls a supply of the fluid or a stop of the supply of the fluid based on the supply signal or the stop signal, wherein:
• when only the fluid is being discharged, the determinator determines a predetermined bin with a large signal intensity of the reflected wave among a plurality of bins partitioning the signal intensity distribution, determines a threshold of the predetermined bin based on the signal intensity, outputs the supply signal for supplying the fluid to the control circuitry when the supply condition occurs, the supply condition being when the reflected wave with a signal intensity exceeding the threshold is detected at the predetermined bin, and outputs the stop signal for stopping the supply of the fluid to the control circuitry when the stop condition occurs, the stop condition being when the reflected wave with the signal intensity exceeding the threshold is no longer detected at the predetermined bin.