Optical water curtain system adaptive to water speed

An optical water curtain system adaptive to water speed, comprising a water supply portion and at least one water collecting portion;

• wherein the optical water curtain system further comprises a physical rotor, a control module, and an LED light-emitting module and a rotation speed detecting module electrically connected to the control module;
• wherein the water supply portion is in fluid communication with the water collecting portion, and one side of the water collecting portion is provided with a number of outlets, water from the water supply portion flows down through the number of outlets of the water collecting portion to form a water curtain;
• the LED light-emitting module is provided at the side of the water collecting portion where the number of outlets are located, and emits light to illuminate the water curtain;
• the physical rotor is located within the water curtain and is rotatable under an impulse of a water flow from the water curtain;
• wherein the rotation speed detecting module is configured to detect a rotation speed of the physical rotor and send data to the control module;
• wherein the control module is configured to adjust a frequency of a PWM signal driving the LED light-emitting module to switch a light-emitting effect of the LED light-emitting module according to the rotation speed of the physical rotor;
• wherein the rotation speed detecting module comprises a rotation speed detecting circuit, and the rotation speed detecting circuit comprises a rotation speed detecting sensor configured for detecting the rotation speed of the physical rotor;
• and
• wherein the rotation speed detecting sensor is a laser velocimetry sensor configured for detecting a frequency of reflection of a laser signal emitted from the laser velocimetry sensor to the physical rotor, to thereby obtain the rotation speed of the physical rotor.