32results about How to "Simple detection algorithm" patented technology

The invention belongs to the field of beauty care and provides a skin color detection method and device and hair removal equipment. The skin color detection method includes that white light is emitted to target-area skin if the skin is detected to be close to the hair removal equipment, light information of target light of the white light subjected to diffuse reflection of the target-area skin is then acquired, and skin color information of the target-area skin is determined according to the light information of the target light. The skin color information of the target-area skin can be determined according to the light information of the target light emitted to the target-area skin and subjected to diffuse reflection of the target-area skin; compared with an existing skin color detection system, the skin color detection method has the advantages that the detection algorithm is simple, and cost of the skin color detection system can be lowered.

The invention relates to the technical field of traffic detection and discloses a method for detecting a fire accident on an expressway or in a tunnel based on a video detection technology. The method comprises the following steps: extracting a picture from an obtained video according to a preset frame rate; utilizing the obtained picture to establish a tunnel background model; extracting a foreground target image from the picture with a background differentiating method; dividing the picture into a background part and a foreground part, and respectively updating the background part and the foreground part in different updating rates; analyzing the foreground target of the image in a detection period, and judging whether a suspected static target exists or not according to time sequence information; and if the suspected static target exists, determining a suspected flame region in combination with the moving and static features of flames, and finally analyzing the suspected flame region of a sequentially extracted image according to flame judging rules and judging whether the fire accident exists or not. The method has the advantages of simple detection algorithm, small calculated amount, capability of shortening processing time, capability of improving detection efficiency, and capability of reducing the influence of the complicated scenic illumination condition of the tunnel on fire detection.

The invention discloses a fault-tolerant proportional coordinated control method of a multi-motor servo drive system with a coupling control structure. The fault detector of the motor servo control system is used to detect the fault of the motor and its electric drive module in real time, based on the coupling control structure of the multi-motor system , design a motor coordination compensator switching logic module that fuses fault detection information, and improve the coordination compensator working mode. When a motor control system fails, the output path of its coordination compensator is cut off, so that the multi-motor system is converted from a coupled control structure to a master-slave control structure. In the master-slave control structure, the master motor is the faulty motor, and the slave motor is the normal motor, so as to ensure that the proportional relationship between the output of each motor in the multi-motor servo drive system remains unchanged, and realize the fault tolerance function; when the faulty motor returns to normal, it is connected by the fault logic decision-making module The motor coordinates the output path of the compensator, and the whole system returns to the original coupling control structure, and the proportional relationship of the output of each motor remains unchanged.