针对实际测量中对多通道及高精度等应用的需求，研制了一种嵌入式计算机多路高精度测力系统，它集压力传感器信号变送、实时采集、大容量数据存储、串行计算机通信于一体，前端采集器基于8051F410单片机和18位高精度模数转化器FS511，实际采样稳定分辨率可以达到16位，与计算机之间通过CAN或RS485物理协议通信。该装置具有万分之一的分辨率、采集单元可存储数据2M字节、可以在一条串行总线上连接多达64个分机，内部定时钟表可连续运行100年不重复。 　　　课题总体由下位机设计和上位机设计构成，基于8051F410单片机的下位机包括硬件电路设计和软件程序设计。论文在理论上分析了被测量数据标定处理所需的修正方法，其中包括使用最小二乘法进行线传感器标定，利用对采集数据进行过采样和求均值的方法来提高ADC分辨率。 　　　下位机硬件采用C8051F410作为核心处理芯片，设计了信号采样电路、滤波电路、模数转换模块、数据存储模块、通讯模块电路等芯片外围电路，充分利用C8051F410内部集成的UART、定时计数器、SPI等功能模块，提高了电路集成度。在模数转换模块设计中使用台湾富晶公司的18位高精度模数转化器FS511。在通信模块设计中，通信口的物理协议可根据需要选择CAN总线或RS485总线，为现场监控与远程监测提供了方便。提供大量数据的存储，可以离线连续存储记录四天的数据，为便携式数据采集仪的应用创造了可能性。下位机程序主要实现对多路测量信号的采样以及采样数据的计算，其中包括利用过采样和求均值方法提高ADC分辨率。 　　　上位机设计是用户程序的开发，以可视化集成开发工具C++Builder作为开发平台，完成了多通道传感器标定处理程序、在线多通道数据显示、绘制了受力变化曲线、利用数据文件设计了数据存储保存和选择查询等功能。 按上述方案设计的样机经过了电路制作与软件调试，在实验室对其进行了测试实验，实验结果表明该测力系统对参数的测量精度达到了设计参数要求。目前本测力系统已成功用于矿层开采后的地面沉陷和应力分析的实验平台中。

This paper introduce an embedded computer multichannel and high-precision force test system，which include Pressure sensor signal transmitting，Real-time acquisition，Great data storage and Serial communication. Front collector based on 8051F410 and FS511. The steady sampling resolution is 16bit，and between the computer through CAN or RS485. To adapt to mechanical engineering equipment requirements in nowadays，this device has those characteristics， like low power consumption， high precision，real-time property， Great data storage，easy data processing，safe and reliable data，convenient mobile flexible etc. 　　　The thesis mainly includes three parts of overall design client computer design and host computer design，the client computer is divided into hardware design and software design. Firstly，the processing method of Measured data is introduced in the theory. Including using least square method in sensor calibration and using over sampling and averaging method to improve the resolution of the ADC. 　　　The client computer is divided into hardware design and software design. The hardware which is designed using C8051F410 as the core processing chips includes signal sampling circuit，filter circuit，A/D conversion module，data storage module，communications circuit and so on. The UART，Timer Counter，SPI and other functional modules integrated in C8051F410 are fully used to improve the circuit integration. Using 18-bit high resolution analog-to-digital converter FS511 in A/D converter. In the design of communication module， communication port can select CAN bus or RS485 bus in the physical protocol. This design brings convenience to the on-site monitoring and remote monitoring and enhances the applicability of the power quality real-time monitor. Providing large amounts of data storage， can record data for four consecutive days when it is offline，and create the possibility for the application of the portable data collecting device. In the client computer software，the multichannel measurement signal sampling and calculating are realized， including the use of over sampling and averaging method to improve the resolution of the ADC. 　　　Host computer design is the development of the user program，which developed on the visual c++Builder integrated development tools to fulfill sensor calibration， data display， curve plotting，data storage and so on. 　　　According to the above specification，the prototype is produced after circuit modification and software debugging. The result of the test in laboratory shows that the force test system’s accuracy of parameters meets the design requirement and the performance is stable. Now， this force test system has been successfully used for experimental platform of analysis of seam mining ground subsidence and stress.