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关键词： 数据采集模块   MSP430AFE221   SD_24A  

摘要： 以16位的微控制器MSP430AFE221为控制核心;设计单电源供电的信号放大电路和低通滤波电路,对压力传感器输出信号进行处理;通过MSP430AFE221内部24位ADC模块(SD_24A)进行模数转换;设计电源电路,应用于低功耗情况.设计与CC1101无线数据传输模块连接的接口电路.

关键词： DNN compression   ECG authentication   fixed-coefficient filtering   neural network optimization   structured sparsity  

摘要： Biometrics such as facial features, fingerprint, and iris are being used increasingly in modern authentication systems. These methods are now popular and have found their way into many portable electronics such as smartphones, tablets, and laptops. Furthermore, the use of biometrics enables secure access to private medical data, now collected in wearable devices such as smartwatches. In this work, we present an accurate low-power device authentication system that employs electrocardiogram (ECG) signals as the biometric modality. The proposed ECG processor consists of front-end signal processing of ECG signals and back-end neural networks (NNs) for accurate authentication. The NNs are trained using a cost function that minimizes intra-individual distance over time and maximizes inter-individual distance. Efficient low-power hardware was implemented by using fixed coefficients for ECG signal pre-processing and by using joint optimization of low-precision and structured sparsity for the NNs. We implemented two instances of ECG authentication hardware with 4X and 8X structurally-compressed NNs in 65 nm LP CMOS, which consume low power of 62.37 mu W and 75.41 mu W for real-time ECG authentication with a low equal error rate of 1.36% and 1.21%, respectively, for a large 741-subject in-house ECG database. The hardware was evaluated at 10 kHz clock frequency and 1.2 V voltage supply.

关键词： AI   algorithm   biomedical application   proce-ssor  

摘要： This paper reviews the state of the arts and trends of the AI-Based biomedical processing algorithms and hardware. The algorithms and hardware for different biomedical applications such as ECG, EEG and hearing aid have been reviewed and discussed. For algorithm design, various widely used biomedical signal classification algorithms have been discussed including support vector machine (SVM), back propagation neural network (BPNN), convolutional neural networks (CNN), probabilistic neural networks (PNN), recurrent neural networks (RNN), Short-term Memory Network (LSTM), fuzzy neural network and etc. The pros and cons of the classification algorithms have been analyzed and compared in the context of application scenarios. The research trends of AI-Based biomedical processing algorithms and applications are also discussed. For hardware design, various AI-Based biomedical processors have been reviewed and discussed, including ECG classification processor, EEG classification processor, EMG classification processor and hearing aid processor. Various techniques on architecture and circuit level have been analyzed and compared. The research trends of the AI-Based biomedical processor have also been discussed.

关键词： 口袋仪器   硬件电路   实践教学   自主学习  

摘要： 介绍了电子技术口袋仪器硬件电路的总体设计方案,结合学生实践的需求及EPM240T100C5的特点,设计并实现了口袋仪器平台硬件电路。该电路包括电路总体结构、CPLD处理器、模拟量输入电路、ADC转换电路及通信接口电路。对硬件电路进行了测试,结果表明该口袋仪器具有稳定可靠、使用方便、易于扩展及性价比高等特点,特别适用于学生进行知行合一的实践活动,有效地提高了学生学习的积极性、主动性及学习效率,在学生的实验教学、创新创业训练项目及学科竞赛实践中取得了良好的应用效果。

关键词： 多路音频压缩   音频监测   多路音频采集   MP3压缩  

摘要： 现有技术中,通常用DSP芯片来对音频进行MP3压缩处理。当一片DSP芯片内要同时运行多个压缩程序来完成多路音频同时压缩时,由于内部资源不够,是无法实现的。但随着广播事业的发展,多通道音频监测的路数逐渐增多,面对多路音频采集压缩,采用一个芯片压缩一路音频的方法,会造成严重的资源浪费,增加设备的成本,同时,会增大电路的规模及设计难度。因此,亟待解决这个问题。是对DGN-32F数字音频电平监测系统[1]硬件设备的升级换代。

关键词： 一卡通   嵌入式系统   硬件设计   软件设计   功能模块   自顶向下设计  

摘要： 为更好实现我国智慧城市建设中通用、共享、快捷、方便、安全的"一卡通用"的小额支付体系,以及拓展智能一卡通卡在公共交通领域的应用和信息获取,在系统需求分析的基础上,采用自顶向下的方法完成智能一卡通处理终端整体系统设计、硬件和软件系统设计,以及车载刷卡、实时监控、全球定位、WiFi热点、无线数据互通、后台数据处理、远程管理终端等功能模块的设计。实际应用表明,基于嵌入式系统的智能一卡通处理终端在系统功能方面能够满足城市中公用服务收费需求,能够为公共交通等服务行业机构的运营与决策提供数据资源,将促进国家金卡工程建设。

关键词： Spartan   6   图像采集   CMOS图像传感器   VGA显示   DDR3   SDRAM   Verilog   HDL语言  

摘要： 为实现图像数据的采集与显示,利用Xilinx提供的MIG_example_designIP核,结合Verilog HDL语言,设计了一种以Spartan 6系列现场可编程门阵列(FPGA)为核心的实时图像采集系统硬件电路。由CMOS OV7670图像传感器进行系统图像采集,利用乒乓操作将图像数据写入DDR3 SDRAM中,经过缓存后将图像输送给上位机由VGA进行实时显示。使用ISE Design 14.7对系统的整个过程和各个模块进行设计。基于Modelsim进行仿真测试,证明该系统满足设计要求。该设计灵活性高、可移植性强,且能够进行实时显示,有助于对图像的预处理,尤其是图像分析和目标识别的优化,为进一步开发更复杂的图像算法提供借鉴。

关键词： 停车场   智能管理系统   硬件设计  

摘要： 随着汽车的普及,停车需求越来越大,同时汽车用户对于停车有了更高的要求。面对这种情况,需要对停车场进行更加高效、智能的管理。文中,从硬件设计出发,对智能停车场管理系统设计进行探讨。

关键词： 火控计算机   PC104模块   软硬件设计  

摘要： 伴随科学技术的持续推新,许多新技术在军事领域中得到广泛应用,有力推动着相关军事设备的发展。文章首先对火控计算机、PC104模块进行了简要分析,分别从软硬件方面,对系统的设计路径作一探讨,望能为此领域研究有所借鉴。