【摘要】 针对海洋地震信号幅度小、动态范围大、噪声干扰强等特点,设计了基于高精度32位Δ-Σ(Sigma-Delta)模数转换器(ADC)的海洋多道地震拖缆四通道采集包。该地震信号采集包以STM32L432为核心,使用SPI总线控制4片32位模数转换器完成地震信号采集,采用九轴姿态传感器实时监测拖缆姿态,通过RS485接口将地震数据和姿态数据上传到数传包。测试表明:该装置自噪声小、动态范围大、功耗小、运行可靠,对海洋地震勘探高精度信号采集研究具有借鉴意义。更多还原

【Abstract】 In view of the small amplitude, large dynamic range, and strong noise interference of marine seismic signals, a four-channel acquisition package of multi-channel seismic streamer based on a high-precision 32-bit Δ-Σ analog-to-digital converter was designed. The seismic signal acquisition package, with STM32L432 as the core,uses the SPI bus to control four 32-bit analog-to-digital converters for seismic signal acquisition. In addition, a9-axis attitude sensor was used to monitor the streamer posture in real time, and the seismic data and attitude data were uploaded to digital packets via an RS485 bus. Tests showed that the device has the merits of small noise, large dynamic range, low power consumption, and reliable operation. It has great significance for the study of high-precision signal acquisition in marine seismic exploration.更多还原