Abstract: An initial rotor position detection device based on a permanent-magnet synchronous motor, including a host computer, a real-time simulation system, and a control system, where the real-time simulation system is connected to the control system, for determining an encoder pulse signal according to the model parameter of the permanent-magnet synchronous motor, the model parameter of the inverter, and a PWM pulse wave generated by the control system; and the control system is connected to the real-time simulation system, for using a binary search algorithm to determine an initial rotor angle of the permanent-magnet synchronous motor according to the encoder pulse signal sent by the real-time simulation system. A comprehensive closed-loop test circuit can be achieved by setting a host computer, a real-time simulation system, and a control system, and a used binary search algorithm can effectively and quickly detect an initial rotor position of a permanent-magnet synchronous motor.

Abstract: An initial rotor position detection device based on a permanent-magnet synchronous motor, including a host computer, a real-time simulation system, and a control system, where the real-time simulation system is connected to the control system, for determining an encoder pulse signal according to the model parameter of the permanent-magnet synchronous motor, the model parameter of the inverter, and a PWM pulse wave generated by the control system; and the control system is connected to the real-time simulation system, for using a binary search algorithm to determine an initial rotor angle of the permanent-magnet synchronous motor according to the encoder pulse signal sent by the real-time simulation system. A comprehensive closed-loop test circuit can be achieved by setting a host computer, a real-time simulation system, and a control system, and a used binary search algorithm can effectively and quickly detect an initial rotor position of a permanent-magnet synchronous motor.

Abstract: An LED lighting based multispectral imaging system for color measurement is provided, including a main control computer and an enclosed type lamp box, where a digital camera is provided at the top of the lamp box, and an LED lamp set control apparatus, a drawer type bearing platform, and an LED lamp set are provided at the bottom of the lamp box. A to-be-measured object is placed on the drawer type bearing platform. The main control computer controls spectral power distribution of the LED lamp set to be in a reciprocal relationship with a spectral sensitivity curve of the digital camera and extracts a camera response and performs calculation, to obtain spectral reflectivity of each pixel of the to-be-measured object.

Abstract: An LED lighting based multispectral imaging system for color measurement is provided, including a main control computer and an enclosed type lamp box, where a digital camera is provided at the top of the lamp box, and an LED lamp set control apparatus, a drawer type bearing platform, and an LED lamp set are provided at the bottom of the lamp box. A to-be-measured object is placed on the drawer type bearing platform. The main control computer controls spectral power distribution of the LED lamp set to be in a reciprocal relationship with a spectral sensitivity curve of the digital camera and extracts a camera response and performs calculation, to obtain spectral reflectivity of each pixel of the to-be-measured object.