介绍了一种基于PCap02的电容式微水检测系统的硬软件设计以及测试结果。硬件部分主要包括电容数字转换芯片PCap02模块、微控制器STM32F103RB模块、RS485通讯模块和电源模块。软件部分是由基于RT-Thread操作系统的下位机程序和采用Mod Bu...介绍了一种基于PCap02的电容式微水检测系统的硬软件设计以及测试结果。硬件部分主要包括电容数字转换芯片PCap02模块、微控制器STM32F103RB模块、RS485通讯模块和电源模块。软件部分是由基于RT-Thread操作系统的下位机程序和采用Mod Bus Poll软件的上位机程序构成。下位机程序按照线程进行编写,实现对电容测量和计算。上位机可实现系统地址修改、测量数据校准和实时显示。系统具有线性度好,测量精度高,实时性强,低功耗的特点,克服了电容传感器存在寄生电容的缺陷。展开更多
To get better methods on diagnosis of cardiovascular diseases and health assessment by comparison analysis of four kinds of cardiovascular signals, which are blood pressure signal (BPS), plus wave signal (PWS), electr...To get better methods on diagnosis of cardiovascular diseases and health assessment by comparison analysis of four kinds of cardiovascular signals, which are blood pressure signal (BPS), plus wave signal (PWS), electrocardiosignal (ECS) and cardiac sound signal (CSS), a four-channel signals collector is introduced in this article. This collector is composed of microcomputer STM32F103RB with integrated 12-bit analog to digital converters (ADCs) and some integrated chips (IC) such as PGA113, a programmable gain amplifier with internal calibration channels for system-level calibration. Therefore, the data of four kinds of cardiovascular signals can be both collected by this signal collector with a high precision and output to a computer by universal serial bus (USB) interface, which can also offers power for this instrument. In addition, the gain of input signal can be changed by computer software through USB interface under microchip commands. Thus it has many merits, such as the small volume, low cost, high performance and precision, digital-controlled gain and so on. Consequently, it is convenient to acquire the data of four kinds of cardiovascular signals by it, and a waveform of one sample is shown.展开更多
文摘介绍了一种基于PCap02的电容式微水检测系统的硬软件设计以及测试结果。硬件部分主要包括电容数字转换芯片PCap02模块、微控制器STM32F103RB模块、RS485通讯模块和电源模块。软件部分是由基于RT-Thread操作系统的下位机程序和采用Mod Bus Poll软件的上位机程序构成。下位机程序按照线程进行编写,实现对电容测量和计算。上位机可实现系统地址修改、测量数据校准和实时显示。系统具有线性度好,测量精度高,实时性强,低功耗的特点,克服了电容传感器存在寄生电容的缺陷。
文摘To get better methods on diagnosis of cardiovascular diseases and health assessment by comparison analysis of four kinds of cardiovascular signals, which are blood pressure signal (BPS), plus wave signal (PWS), electrocardiosignal (ECS) and cardiac sound signal (CSS), a four-channel signals collector is introduced in this article. This collector is composed of microcomputer STM32F103RB with integrated 12-bit analog to digital converters (ADCs) and some integrated chips (IC) such as PGA113, a programmable gain amplifier with internal calibration channels for system-level calibration. Therefore, the data of four kinds of cardiovascular signals can be both collected by this signal collector with a high precision and output to a computer by universal serial bus (USB) interface, which can also offers power for this instrument. In addition, the gain of input signal can be changed by computer software through USB interface under microchip commands. Thus it has many merits, such as the small volume, low cost, high performance and precision, digital-controlled gain and so on. Consequently, it is convenient to acquire the data of four kinds of cardiovascular signals by it, and a waveform of one sample is shown.
