本发明提供了一种基于DSP和CPLD的数据采集系统,信号调理电路采集输入信号的外部模拟量,外部模拟量经信号调理电路后进入双4选一模拟开关,双4选一模拟开关将电压信号分时输出至AD7656芯片;AD7656芯片对输入电压信号完成数字量的转换,数字量通过16位数据总线传输至DSP芯片,DSP和CPLD对AD7656芯片进行时序控制。本发明简化了前向调理电路,去除了用DSP片内A/D采样所必需的比例调整和电平提升与处理电路,减小了采样误差,另一方面拓宽了工作电压范围,使用更加灵活。

    The invention provides a DSP- and CPLD-based data acquisition system. A signal conditioning circuit is used for acquiring external analog quantity of an input signal, the external analog quantity passes through the signal conditioning circuit and then enters a dual four-channel analogue switches, the dual four-channel analogue switches are used for outputting a voltage signal to an AD7656 chip ina time division way, the AD7656 chip is used for completing digital quantity conversion on an input voltage signal, the digital quantity is transmitted to a DSP chip by a 16-bit data bus, and the DSPand the CPLD are used for performing time-sequence control on the AD7656 chip. By the DSP- and CPLD-based data acquisition system, the forward conditioning circuit is simplified, proportional adjustment necessary to A/D sampling in the DSP chip and level improvement and handling circuit are eliminated, and a sampling error is reduced; and on the other hand, the working voltage range is expanded, and the DSP- and CPLD-based data acquisition system is more flexible to use.


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    Titel :

    一种基于DSP和CPLD的数据采集系统


    Erscheinungsdatum :

    07.02.2025


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    G05B Steuer- oder Regelsysteme allgemein , CONTROL OR REGULATING SYSTEMS IN GENERAL / B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / G08C Übertragungssysteme für Messwerte, Regel-, Steuer- oder ähnliche Signale , TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS



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