乒乓操作方法在增量式时栅信号处理电路设计中应用

Application of ping-pong operation in incremental time-gratingsignal processing circuit

在分析增量式时栅位移传感器原理及其信号生成方法的基础上,介绍了一种在数字信号处理电路中的数据流乒乓操作方法,并提出了一种基于该方法的增量式时栅信号处理电路方案。信号处理电路采用复杂可编程逻辑器件(CPLD)芯片设计。预处理电路将测头信号进行模数转换后,经过防丢步增步电路和防重复计数电路模块处理,保证了测量信号的可靠性;再经过乒乓操作电路模块,采用2路增量信号处理模块进行运算,保证了测量信号的流水线操作;最后通过接口电路输出测量结果。对信号处理电路进行了仿真实验,结果证明,该方法可满足增量式时栅传感器测量信号流的实时处理,实现增量式时栅原理对位移的测量。

Based on the principle of incremental time- grating displacement sensor and its signal generation,a method of data stream ping- pong operation for data signal processing is presented. Based on it,an incremental time- grating signal processing circuit is proposed. CPLD （Complex Programmable Logic Device） is applied in the design. After analog-to-digital conversion in pretreatment circuit,measured signals are processed in loss-of-step and gain-of-step prevention circuit and re- count prevention circuit to ensure their reliability. The ping- pong operation circuit uses two incremental signal processing circuits for calculation to ensure the pipelining of measured signals. The result is output through interfacing circuit. The signal processing circuit is simulated and results show that,the method is competent for the real-time signal-flow processing of incremental time-grating sensor and realizes the disnlacement measurement based on incremental time-grating princiole.