共查询到20条相似文献,搜索用时 53 毫秒
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电子秤系统设计主要包括硬件电路设计,软件编程调试,实物称重三部分.硬件电路部分是以单片机STC89C52RC为核心控制单元,实现控制数据的处理.数据采集部分选用压力传感器,采用24位AD转换芯片HX711对传感器采集到的模拟量进行AD转换.转换后的数据经过放大后送到单片机进行处理,由LCD12864液晶显示数据,软件部分采用keil编程实现.称重测量结果显示:称重范围5.00~ 500 g,重量小于50 g时,称重误差小于0.5 g;重量在50 g及以上,称重误差不大于1g.此电子秤具有快速方便、数字显示、自动计价去皮,金额自动累加等优点. 相似文献
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文中介绍了一种基于NRF24L01的多点无线称重节点设计,主要阐述了称重系统中节点的结构及软件、硬件设计。在节点设计中,使用低功耗STC12C56A60S2型单片机、称重专用芯片HX711、NRF24L01无线数据传输模块,可将采集的数据上传到上位机软件中,实现多点无线称重系统设计。文中节点设计具有传感器信号调理测量电路简单、数据无线传输、低成本的特点。 相似文献
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本设计易懂、简练,所用器件常见,上网查询资料方便,电路模块具有通用性,非常适合广大电子爱好者制作。本电子琴系统以SST89E564RD为中心,融合了82C79可编程键盘,LED接口电路模块、存储扩展模块、喇叭驱动控制模块,以简单的硬件电路和相对复杂的软件来实现,图1为其原理图。 相似文献
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TL16C550在TMS320VC5402与PC机串行通信中的应用 总被引:2,自引:0,他引:2
介绍了利用TI公司的通用异步接收发送器TL16C550实现TMS320VC5402与PC机之间的串行通信,并给出TL16C550与TMS320VC5402连接的硬件电路及软件编程.该设计系统不仅编程简单,而且具有可靠性高、实时性强的特点. 相似文献
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为了解决因微弱信号放大而影响电子秤精度的问题,采用了仪表放大器作为压力传感器前置放大器,解决了由放大环节带来的失调电压和温漂等问题。简要论述了电阻应变式称重传感器的工作原理、设计了系统硬件电路与软件。经测试设计的电子秤误差小于0.3%,且具有数据准确稳定、称量快捷等特点。 相似文献
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在电子技术开发应用的过程中,电子电路仿真技术得到了有效发展。同时,在实际工作中,只有有效地应用好电子电路仿真技术,才能够将应用开发电子的效率提高,广泛地应用着电子产品也奠定了电子电路仿真技术的基础。本文探析了电子电路仿真技术在电子应用开发中的作用。 相似文献
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分子电子技术是以分子作为载体 ,在分子水平上实现电子学的信息处理和存储过程的仿生技术。它是 70年代以来在分子电子学基础上产生的一门新兴技术。其目标是研制由分子器件构造的并行分布式仿生智能信息处理系统 ,开辟了信息科学发展的新途径。 相似文献
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An electronic circuit based on op-amps is presented that can perform three different electronic functions: V-I conversion, I-V conversion and differential amplification can be obtained by minor changes. The V-I converter can be used to excite floating loads. Theoretical and simulation results have been found to agree closely 相似文献
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为实现电子政务办公系统中数字签名和盖章的需求,结合了PKI公共密钥基础设施、数字证书、USBKey、ActiveX控件、COM组件等新兴技术给出了一种新的电子签章系统,对基于公文流转的电子签章系统进行研究并提出了一些想法。 相似文献
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《Spectrum, IEEE》1995,32(3):37-48
The shortcomings of the human driver are getting help from emerging technologies in the guise of navigation systems, engine immobilizers, night vision assistance, automated collision alert, air bag systems, low tyre pressure warning system, and fuzzy logic. The author describes these technologies. In particular the author describes some of the LCD display navigation systems, and intelligent transportation systems, including vehicle location, of which navigation is a component 相似文献
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Neuromorphic electronic systems 总被引:2,自引:0,他引:2
Mead C. 《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1990,78(10):1629-1636
It is shown that for many problems, particularly those in which the input data are ill-conditioned and the computation can be specified in a relative manner, biological solutions are many orders of magnitude more effective than those using digital methods. This advantage can be attributed principally to the use of elementary physical phenomena as computational primitives, and to the representation of information by the relative values of analog signals rather than by the absolute values of digital signals. This approach requires adaptive techniques to mitigate the effects of component differences. This kind of adaptation leads naturally to systems that learn about their environment. Large-scale adaptive analog systems are more robust to component degradation and failure than are more conventional systems, and they use far less power. For this reason, adaptive analog technology can be expected to utilize the full potential of wafer-scale silicon fabrication 相似文献
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《Solid-State Circuits, IEEE Journal of》1972,7(6):469-474
After a brief introduction to the gyrator concept, its realization as an accurate monolithic integrated circuit is described. The inherent electronic problems are considered and performance criteria are defined. Data are given. Applications, particularly in electric filters, are discussed and it is shown that in the lower frequency range the use of these `semifloating' gyrators can be very advantageous. The monolithic integration of the gyrator can be seen as a major step toward integrated selectivity. 相似文献