double polarity meaning in English
双极性
Examples
- According to the test conditions , the double polarity inputting mode is adopted in the circuit of voltage - frequency converting part ; storage batteries are used in the optical emission part of optical fibre isolating and transmitting device , that can guarantee isolation between the main circuit and the testing system ; the 89c51 singlechip is used in the singlechip testing - controlling unit , the peripheral circuits are extended , data are transmitted through the serial port in this part ; the p opular software delphi5 . 0 is used in the pc part , the communication between singlechip and pc by serial port , plotting of current wave , regulation of data ; the optical - electrical isolating and triggering are used in the controlling part , this can guarantee the veracity and reliability of breakers triggered , this triggering mode is also used in the triggering of the main closing breaker , the tested breaker and the assistant breaker , the triggering signals are sent out by a singlechip
压频转换部分电路中根据实际情况采用了双极性输入方式；光纤隔离传输装置的光发射部分电源采用了蓄电池供电，确保了主回路与测试回路的完全隔离；单片机测控部分采用了89c51单片机，扩充了外围电路，通过串口向pc机传送数据； pc机与单片机之间的串口通讯、波形绘制、数据管理等都采用了软件delphi5 . 0编写。该测试系统中预留了输出口，可以对合成回路中的主合闸开关、被试开关、辅助开关进行触发，信号由单片机发出，控制部分采用了光电耦合隔离触发的方法。软件设计主要集中在对电流信号的数据采集、数据处理、数据传送、人机界面、波形绘制和数据管理，软件部分又可分为单片机和pc机程序设计两大部分。 - The signal sampling circuit fulfill the tasks of sampling signal and changing the double polarities signal to the single polarity signal ; the drive circuit receives the pwm signals from dsp and pass the signals to ipm through optical - couple devices ; the protective circuit safeguard the system against high current , high voltage , low voltage and high temperature on the ipm model
其中信号处理电路主要完成采集输出电流和中间直流环节电压信号，并对采集到的电流信号进行极性变换处理的功能；驱动电路接收dsp输出的高频驱动信号，通过耦合器件直接驱动ipm模块；保护电路利用采集到电气信号对整个系统实施保护，包括过电流、过电压、欠电压、 ipm模块过热等。