論文ID: 21-00379
Copper (Cu) particles volume fraction in Aluminum-Copper (Al-Cu) have been detected by multiple-amplitude modulation which is implemented into an impedance measurement system (mAM-IMS). The mAM-IMS has an evaluation section and a measurement section. The evaluation section is composed of three steps which are 1) The evaluation step of single modulation frequency fm for Cu particles volume fraction φCu detection in static Al-Cu mixtures, 2) The evaluation step of multiple fm for φCu detection in vibrating Al-Cu mixtures, 3) The determination step of multiple-AM for the best modulation and carrier frequencies fm/fc combination for φCu detection in vibrating Al-Cu mixtures under vibration frequency fp. All steps in the evaluation section are investigated by a simulation study. After the evaluation step, the best fm/fc combination is tested and evaluated in the measurement section by the wet-type gravity vibration separator (WGS) deck for the experimental φCu detection in vibrating Al-Cu mixtures under constant vibration frequency fp. As a result, the mAM-IMS with the best fm/fc combination should satisfy the requirement of fm ≤ fp < fc where fc = 2.5fp. By evaluating the normalized measured impedance Z′^expm in the range of 0% ≤ φCu ≤ 57.14%, the mAM-IMS with the best fm/fc combination is able to detect the experimental φCu in vibrating Al-Cu mixtures by spatial-mean error deviation 〈ε〉=8.12%.