为解决传统治疗仪体积庞大不便随身携带、处方固定易被肌体适应从而降低治疗效果的问题，设计了一款基于USB接口的便携式中频电疗仪。硬件电源采用USB接口供电，功率输出部分采用甲乙类互补对称功率放大电路并结合环形磁心变压器。系统电路包括USB接口电路、电源转换电路、D/A转换电路及功率放大电路。软件部分开发了USB固件程序、USB驱动程序及客户端应用程序。医生可根据患者的治疗反馈信息，重新编写处方或添加最新专家处方，提供远程帮助。该装置体积小，质量轻，轻便易携。%The traditional therapeutic apparatus is huge in size and inconvenient to carry, and the fixed prescriptions are easy adapted by organism,which results in reduction of the efficacy of treatment. To solve these problems,the portable intermediate frequency electrotherapeutic apparatus based on USB interface is designed. The power of hardware is supplied by USB interfacing circuit, power conversion circuit, D/A conversion circuit and power amplifier. For the software,the USB firmware,USB driver,and client application are developed. The doctor can rewrite the prescription or add latest expert prescription in accordance with the feedback from patients to provide remote assistance. The sizes of this apparatus are small and the quality is light,which is light to carry.
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