Spray cooling fan control system and method based on the computer vision technology

A method for controlling a spray cooling fan based on computer vision technology, comprising the following steps:

• obtaining, a map of a control area of a spray cooling fan, an outdoor air temperature, an outdoor air humidity, and a ground temperature;
• and comparing the outdoor air temperature with an outdoor air temperature threshold;
• in response to the outdoor air temperature being greater than the outdoor air temperature threshold, acquiring a video of the control area of the spray cooling fan to determine whether there is a person active in the control area and a thermal posture of an active person;
• and when there is one of persons in the control area with a thermal posture, obtaining the facial skin temperature of the persons;
• acquiring, based on the facial skin temperatures of the persons, the outdoor air temperature, the outdoor air humidity, and the ground temperature, a thermal sensation of each of the persons, to thereby a group thermal sensation in the control area;
• and comparing the group thermal sensation with a group thermal sensation threshold;
• in response to the group thermal sensation being greater than the group thermal sensation threshold, acquiring two-dimensional position coordinates of the persons in the control area and a initial position of the spray cooling fan;
• setting an area with a largest number of persons in the position coordinates as a target area;
• determining a location which is 0.5 m around the target area and closest to the spray cooling fan as an optimal position of the spray cooling fan;
• and acquiring an optimal route for movement of the spray cooling fan from the initial position of the spray cooling fan to the optimal position of the spray cooling fan through an ant colony algorithm;
• controlling the spray cooling fan to move to the optimal position of the spray cooling fan according to the optimal route for the movement of the spray cooling fan;
• asking the persons in the target area whether to turn on a spray device and/or a fan of the spray cooling fan;
• and
• in response to determining that the spray device and/or the fan of the spray cooling fan are/is required to be turned on, controlling the spray device and/or the fan of the spray cooling fan to turn on to correspond to a fan gear and an opening of a spray water flow valve corresponding to the group thermal sensation.

A spray cooling fan control system based on computer vision technology, comprising:

• a data acquisition system, an information processing system, a mobile control system, an intelligent voice interaction system, and a terminal control system;
• wherein the data acquisition system is used to:
• collect data information, comprising:
• postures and positions of persons in a control area, facial skin temperatures of the persons, an initial position of a spray cooling fan, an outdoor air temperature, an outdoor air humidity, and a ground temperature;
• compare the outdoor air temperature with an outdoor air temperature threshold;
• and
• when the outdoor air temperature is greater than the outdoor air temperature threshold, transmit the data information to the information processing system;
• wherein the data acquisition system comprises:
• a personnel data acquisition module, comprising:
• a camera, disposed on a top of the spray cooling fan and used to acquire a digital image matrix of the postures of the persons, the positions of the persons, a density of the persons, and the facial skin temperatures of the persons;
• and
• an infrared temperature sensor, disposed on the top of the spray cooling fan and used to calculate the facial skin temperatures of the persons with the camera;
• an environmental data acquisition module, comprising:
• an air temperature sensor, disposed under a solar photovoltaic power panel on the top of the spray cooling fan, and used to gather the outdoor air temperature near the spray cooling fan in the control area;
• an air humidity sensor, disposed under the solar photovoltaic power panel on the top of the spray cooling fan, and used to collect the outdoor air humidity near the spray cooling fan in the control area;
• and
• an infrared temperature sensor, disposed under the solar photovoltaic power panel on the top of the spray cooling fan, and used to acquire the ground temperature near the spray cooling fan in the control area;
• and
• a position module, comprising:
• a spray cooling fan locator, disposed under the spray cooling fan, and used to collect the initial position of the spray cooling fan using a global positioning system (GPS) method;
• and
• an ultrasonic distance meter, disposed under the spray cooling fan, and used to:
• obtain distances between the persons and the spray cooling fan;
• and obtain positions of the persons on a map according to the distance and the positions of the persons;
• wherein the information processing system, embodied by a first processor and a first memory coupled to the first processor, and the first memory stores first computer programs executable by the first processor, and the first processor is used to:
• obtain the data information collected by the data acquisition system;
• optimize the data information to calculate a group thermal sensation, an optimal position of the spray cooling fan, and real-time obstacle avoidance information for movement of the spray cooling fan;
• when the group thermal sensation is greater than a group thermal sensation threshold, obtain an optimal route for the movement of the spray cooling fan according to the initial position of the spray cooling fan, the optimal position of the spray cooling fan, and the real-time obstacle avoidance information for the movement of the spray cooling fan;
• transfer the optimal route for the movement of the spray cooling fan and the real-time obstacle avoidance information for the movement of the spray cooling fan to the mobile control system;
• and
• transfer the group thermal sensation to the terminal control system;
• wherein the mobile control system, embodied by a second processor and a second memory coupled to the second processor, and the second memory stores second computer programs executable by the second processor, and the second processor is used to:
• control the spray cooling fan to move to the optimal position of the spray cooling fan according to the optimal route for the movement of the spray cooling fan and the real-time obstacle avoidance information for the movement of the spray cooling fan;
• and
• transmit location information of the mobile control system to the intelligent voice interaction system;
• wherein the intelligent voice interaction system, embodied by a third processor and a third memory coupled to the third processor, and the third memory stores third computer programs executable by the third processor, and the third processor is used to:
• acquire the location information of the mobile control system and interrogate the persons around the spray cooling fan to turn on a spray device and/or a fan of the spray cooling fan;
• and
• transmit voice commands of the persons to the terminal control system;
• and
• wherein the terminal control system, comprising a terminal controller and used to:
• obtain the voice commands of the persons;
• and
• control an opening of the spray cooling fan according to the group thermal sensation.