基于ADS8332的生理信号采集系统电路设计

本文介绍了医学生理信号的的特点,根据其特点设计出了针对医学生理信号进行采集的电路。该电路设计实现了基于16位的高精度A/D 转换芯片ADS8332 的医学生理信号采集系统,以基于Cortex-M3 内核的32 位微控制器STM32F103RD作为采集控制芯片,该系统电路可以实现对最多16 个通道的模拟医学生理信号进行采集。此电路设计充分利用了ADS8332 的高精度、低功耗、高采样速率的特点以及片上集成功能,并配合了信号调理电路和相应的抗干扰措施,因此保证了医学生理信号的采集精度和系统的稳定性。     

生物阻抗测量系统的改良

目的:针对目前现有的生物阻抗测量系统测量速度和精度不够的问题,提出相应的改进方法。方法:在信号发生部分采用AD公司的ADuC847微处理器作为核心微处理器;在信号采集部分采用Atmel公司的AT91RM9200微控制器芯片和TI公司的ADS1256芯片作为核心芯片。结果:生物阻抗测量系统的信号发生精度提高到12位,信号采集精度提高到24位,速度提高到30,000SPS。结论:对信号发生和信号采集方面速度和精度的提高,有效地提高了整个测量系统的速度和精确度。     

一种动物实验监控系统的设计

本文主要设计动物生命体征参数（体温、呼吸率和脉搏率）的监控系统。硬件电路采用MSP430F5438芯片作为微控制器,体温、呼吸和脉搏生理参数的信号采集使用了相应的信号调理电路和处理电路,主要由电信号转换电路、放大滤波电路、AD转换电路、脉冲转换电路、LCD显示电路、加热垫和蜂鸣器驱动电路等组成。     

心电、呼吸信号采集分析系统的研制

设计一种用于移动监护系统的生理信息采集及预处理装置。该装置以ARM为核心,包括低功耗的双路心电信号放大、滤波、抗基线漂移电路。实现了心电信号的采集、预处理、简单分析及从心电信号中提取呼吸信号等功能。     

NSA－Ⅱ型生理信号处理系统

介绍一种ＩＢＭ－ＰＣ系列微机生理信号采集、处理系统。该系统信号采集卡集程控放大、脉冲甄别、Ａ／Ｄ、Ｄ／Ａ等电路于一体,可满足各种生理信号的采集需要。采集信号时可长时间显示,动态观察。采样后,按需要给出各种图表与结果。部分处理方法采用独特数学模型,使结果更加精确。     

NSA—Ⅱ型生理信号处理系统

介绍一种ＩＢＭ－ＰＣ系列微机生理信号采集、处理系统。该系统信号采集卡集控放大、脉冲甄别、Ａ／Ｄ、Ｄ／Ａ等电路于一体,可满足各种生理信号的采集需要。采集信号时可长时间显示,动态观察。采样后,按需要给出各种图表与结果。部分处理方法采用独特数学模型,使结果更加精确。     

成都仪器厂生物信号采集与处理系统等产品简介

Rm6240B／C（四道）、R卫位80C（八道）、Rm62160C（十六道）生理记录仪暨生物信号采集与处理系统 ★Rm6240B／C、Rm6280C、Rm62160C生理记录仪暨生物信号采集与处理系统是成都仪器厂研制的新一代医学实验设备，产品获得了医疗仪器准产注册证、计量器具生产许可证等有关证照，符合医疗仪器及药品监督管理的有关法规。隔离型产品既可用于人体实验也可用于动物实验。     

神经电生理信号多道同步采集和分析系统

单细胞多点同步记录技术在国内外已经被广泛应用,但在国内仍缺乏与国产或日产细胞电生理记录仪器相匹配的多通道同步生物电信号采集与分析系统。本文介绍了新近研制的可进行双通道甚至晚多通道细胞电生理信号采集的神经细胞电生理信号采集与分析系统,及其关键技术及实现方法和应用实例。     

成都仪器厂生物信号采集与处理系统等产品简介

Rm6240B／C（四道）、Rm6280C（八道）、Rm62160C（十六道）生物信号采集与处理系统Rm6240B／C、Rm6280C、Rm62160C生理记录仪暨生物信号采集与处理系统是新一代医学实验设备,产品获得了医疗仪器准产注册证等有关证照,符合医疗仪器及药品监督管理的有关法规。隔离型产品既可用于人体实验也可用于动物实验。级联型产品可将4道或8道系统级联为8道或16道系统。     

成都仪器厂生物信号采集与处理系统等产品简介

Rm6240B／C（四道）、Rm6280C（八道）、Rm62160C（十六道）生物信号采集与处理系统Rm6240B／C、Rm6280C、Rm62160C生理记录仪暨生物信号采集与处理系统是新一代医学实验设备,产品获得了医疗仪器准产注册证等有关证照,符合医疗仪器及药品监督管理的有关法规。隔离型产品既可用于人体实验也可用于动物实验。级联型产品可将4道或8道系统级联为8道或16道系统。     

The design of a novel complementary metal oxide semiconductor detection system for biochemical luminescence

We designed a complementary metal oxide semiconductor (CMOS) chip with accompanied accessories as a system for the detections and quantifications of biochemical luminescence. This is the first of such instruments that has been reported. The semiconductor chip was manufactured through a 0.25 microm CMOS standard process. A current mirror was designed in integrated circuit (IC) to amplify the signal current that was induced by chemiluminescence. Horseradish peroxidase (HRP)-luminol-H2O2 system was used as an example to constitute a useful platform for coupling to chemiluminescence reactions which produce H2O2. Glucose-glucose oxidase (GOD) reaction was coupled with HRP-luminol-H2O2 reaction to demonstrate the ability of the novel CMOS base instrument for quantifying the biological luminescence of a variety of valuable clinical assays. Our results illustrated that the combination of the specifically designed CMOS IC and commercially available electronic devices established a simple and useful bioanalytical tool.     

Electrophoresis gel image processing and analysis using the KODAK 1D software.

The present article reports on the performance of the KODAK 1D Image Analysis Software for the acquisition of information from electrophoresis experiments and highlights the utility of several mathematical functions for subsequent image processing, analysis, and presentation. Digital images of Coomassie-stained polyacrylamide protein gels containing molecular weight standards and ethidium bromide stained agarose gels containing DNA mass standards are acquired using the KODAK Electrophoresis Documentation and Analysis System 290 (EDAS 290). The KODAK 1D software is used to optimize lane and band identification using features such as isomolecular weight lines. Mathematical functions for mass standard representation are presented, and two methods for estimation of unknown band mass are compared. Given the progressive transition of electrophoresis data acquisition and daily reporting in peer-reviewed journals to digital formats ranging from 8-bit systems such as EDAS 290 to more expensive 16-bit systems, the utility of algorithms such as Gaussian modeling, which can correct geometric aberrations such as clipping due to signal saturation common at lower bit depth levels, is discussed. Finally, image-processing tools that can facilitate image preparation for presentation are demonstrated.     

A video digitizer for analysis of trunk deformity in scoliosis

Scoliosis is a deformity characterized by lateral curvature of the spine and accompanied by axial rotation of the vertebrae; it often causes varying degrees of trunk deformity. Research has indicated that topographic techniques can be used to describe the disorder and monitor its progression. A video image acquisition system has been designed which reduces the time required to quantify topographic details of the trunk and aids in the diagnosis, monitoring and research of scoliosis. This system integrates the capability of large, expensive grey-scale image acquisition equipment into a small, low-cost diagnostic imaging tool using current technologies and design techniques. The video digitizer accepts a standard NTSC monochromatic video signal as input and the unit is connected to a computer via an EEE-488 bus from which the ditigizer is controlled. The digitizer samples the video signal in real time using a high-speed flash converter controlled by an application-specific integrated circuit; the digital samples are stored in memory until the host computer requests that the information be transferred.     

A versatile data acquisition system for physiological modelling of laboratory fermentation processes

Summary A versatile data acquisition system for physiological modelling of laboratory fermentation processes is given. This system meets the stringent qualifications of modern modelling techniques in terms of signal to noise ratios and sampling rates using readily available equipment. The data are portable to any data processing system for modelling and analysing the culture characteristics. Two completely equipped fermentation systems are sampled with a sampling period of six seconds. The data acquisition system is used to acquire data of a set of continuous fermenters showing sustained oscillations. Oscillation data was used to show the performance of the data acquisition system. With the high sampling rate signal to noise ratios of 30 dB or higher are achieved. It was possible to determine periods of oscillatory behaviour and delay times. The system has shown to be versatile in alaboratory set up. Addition or subtraction of sensors or complete fermentation systems can be done without major alterations to the system.     

SLControl: PC-based data acquisition and analysis for muscle mechanics

SLControl is a computerized data acquisition and analysis system that was developed in our laboratory to help perform mechanical experiments using striated muscle preparations. It consists of a computer program (Windows 2000 or later) and a commercially available data acquisition board (16-bit resolution, DAP5216a, Microstar Laboratories, Bellevue, WA). Signals from the user's existing equipment representing force, fiber length (FL), and (if desired) sarcomere length (SL) are connected to the system through standard Bayonet Neill Concelman cables and saved to data files for later analysis. Output signals from the board control FL and trigger additional equipment, e.g., flash lamps. Windows dialogs drive several different experimental protocols, including slack tests and rate of tension recovery measurements. Precise measurements of muscle stiffness and force velocity/power characteristics can also be accomplished using SL and tension control, respectively. In these situations, the FL command signal is updated in real time (at rates > or =2.5 kHz) in response to changes in the measured SL or force signals. Data files can be exported as raw text or analyzed within SLControl with the use of built-in tools for cursor analysis, digital filtering, curve fitting, etc. The software is available for free download at http://www.slcontrol.com.