自动化仪表
自動化儀錶
자동화의표
PROCESS AUTOMATION INSTRUMENTATION
2014年
8期
27-30
,共4页
信号全隔离%模拟信号%数字信号%HCNR201%FPGA%混合编帧
信號全隔離%模擬信號%數字信號%HCNR201%FPGA%混閤編幀
신호전격리%모의신호%수자신호%HCNR201%FPGA%혼합편정
Signal full isolation%Analog signal%Digital signal%HCNR201%FPGA%Mixed framing
为采集飞行器落地瞬间两路隔离电压参数与一路PCM码流数据参数,采用“信号全隔离”思想,在电源隔离的同时使用光耦隔离芯片HCNR201对两路模拟电压速变量信号进行光耦隔离。系统采用 Xilinx 公司 Vertex-II 系列器件作为 FPGA,以光继电器AQY210为选通开关,ADS8365作为模数转换器,经过FPGA混合编帧处理后将数据写入Flash中,存储数据完整可靠,模拟量波形稳定。实践证明,该系统可以成功隔离并采集到多路信号,满足设计需求。
為採集飛行器落地瞬間兩路隔離電壓參數與一路PCM碼流數據參數,採用“信號全隔離”思想,在電源隔離的同時使用光耦隔離芯片HCNR201對兩路模擬電壓速變量信號進行光耦隔離。繫統採用 Xilinx 公司 Vertex-II 繫列器件作為 FPGA,以光繼電器AQY210為選通開關,ADS8365作為模數轉換器,經過FPGA混閤編幀處理後將數據寫入Flash中,存儲數據完整可靠,模擬量波形穩定。實踐證明,該繫統可以成功隔離併採集到多路信號,滿足設計需求。
위채집비행기락지순간량로격리전압삼수여일로PCM마류수거삼수,채용“신호전격리”사상,재전원격리적동시사용광우격리심편HCNR201대량로모의전압속변량신호진행광우격리。계통채용 Xilinx 공사 Vertex-II 계렬기건작위 FPGA,이광계전기AQY210위선통개관,ADS8365작위모수전환기,경과FPGA혼합편정처리후장수거사입Flash중,존저수거완정가고,모의량파형은정。실천증명,해계통가이성공격리병채집도다로신호,만족설계수구。
To acquire two channels of isolated voltage parameters and one channel of PCM code stream data parameter at the landing moment of the aircrafts, the concept of “signal full isolation” is adopted. While in power supply isolation, the opto-coupling isolation chip HCNR201 is used to opto-coupling isolate two of the speed variable analog voltage signals. In the system, the device of Vertex-II family from Xilinx is used as the FPGA, the optical relay AQY210 is used as the strobe switch, and ADS8365 is used as A/D converter. After FPGA mixing framing processing, the data are written into Flash, the data saved are reliable and complete, and the analog waveform is stable. The practice proves that the system can successfully isolate and collect multiple channels of signals, so the demand for design is satisfied.
