超小型超声检测系统低功耗技术

摘要

Implement of ultrasonic testing system of low-power consumption is presented in this paper.The system is based on FPGA and ARM platforms,using a modular hierarchical design.This paper focuses on the non-destructive testing methods to achieve low-power systems from both hardware and software:The isolation of transceiver circuit and amplifier by dormancy transformer coupling circuit,which reduces the voltage of the amplifier.Through the AD time-sampling technology,it reduces the working time of AD sampling and the power consumption of the system.The implement of sleep and wake-up of the device by the power management of Linux system shall reduce the time of the device.After the performance tests,it shows that the three methods proposed in this paper effectively reduce the power consumption of the system,prolong the use time of battery,improve the performance of the system and meet the requirements.%介绍了超声检测系统低功耗的实现方案。该系统基于FPGA 和ARM 平台，采用了模块化层次化的设计思想，重点从硬件和软件两个方面研究了超声检测系统低功耗的实现方法：利用变压器耦合电路实现了收发电路与放大器的隔离，降低了放大器的电压；利用AD 分时采样减少了AD 采样工作时间，减少系统功耗；利用Linux 电源管理功能实现了系统的休眠与唤醒，减少了设备工作时间。经过性能测试表明，提出的三种方法有效地降低了系统的功耗，延长了电池的使用时间，提升了系统的性能，满足设计需求。