内容简介 本书基于Blynk 物联网平台,通过项目实践的方式引导读者制作物联网项目。全书包括 准备篇、基础项目实践篇、中级项目实践篇、高级项目实践篇和附录五部分内容。 本书先介绍物联网的一些概念,并在认识物联网开发板的基础上介绍搭建物联网开发环 境的方法;接着通过实现远程控制台灯、定时风扇等初级项目,引导读者利用手机与硬件完成互相发送简单命令、实现远程控制、远程数据获取等任务。随着项目的深入,本书将介绍网络校准时钟、校园气象站等中级项目,进而介绍远程红绿灯、教室人数统计器等高级项目,最终帮助读者掌握复杂数据的发送与接收、硬件与硬件之间的通信与桥接等技能。 通过阅读本书,读者可以掌握Blynk 物联网开发技术的相关知识,了解物联网的开发原 理与步骤,能够独立开发物联网项目。 本书适合具有图形化编程(Scratch、Mixly 等)基础的小学高年级学生以及对物联网等创客技术感兴趣的初、高中学生阅读,也可供中小学信息技术教师、培训机构的创客教师阅读参考。作者简介 裘炯涛,浙江省杭州市经济技术开发区听涛小学信息技术老师,致力于创客教育、STEAM 教育研究,在《中小学信息技术教育》《无线电》《中国信息技术教育》等期刊发表十余篇相关论文,著有《边玩边学Scratch: 儿童趣味游戏设计之猫咪侠历险记》《来吧,一起创客!基于Mixly 的创客作品30 例》(上下册)等广受国内中小学创客师生喜爱的图书。曾受邀到北京师范大学、浙江大学、杭州师范大学、宁波大学等高 校以及上饶、海宁、温州等地做专题讲座和经验分享十余次。 陈众贤,浙江大学机械电子工程硕士,“捣鼓车间”青少年科技创新实验室创始人。从事人工智能、机器人、智能设备等研究行业多年,曾任浙江大学机械工程学院助理研究员,参与多项国家级研究项目,拥有十余项国家专利。兼任杭州市多所中小学校外创客导师,指导学生参加国家、浙江省内各级科技类比赛(多次荣获一等奖),并指导学生申请十余项专利。致力于创客教育、STEAM 教育行业3 年,撰写十余篇教学案例,发表于《无线电》杂志、《爱上机器人》杂志、DF 创客社区等。
标签: 物联网
上传时间: 2022-04-28
上传用户:slq1234567890
超声波换能器作为一种实用的检测手段,能实现声波所携带的信息和电能之间转换。它的性能优良,价格低廉,操作方便,易于调试,因此在工农业生产中发挥着重要的作用。但目前换能器驱动电路的发射频率多为40 kHz,本文针对1 MHz的超声波换能器电路进行了设计,主要介绍了它的发射驱动电路和接收驱动电路的设计方案,并对它们的功能进行了详细地说明。最后搭建实验平台,并对电路的输入、输出模块进行了测试。实验结果表明,换能器电路运行良好,可以为超声波高精度测量领域的应用提供参考。As a practical means of detection, ultrasonic transducer can realize the conversion between theinformation carried by sound wave and electric energy.It has the advantages of excellent performance,low cost, convenient operation and debugging, so plays an important role in industrial and agriculturalproduction.However, the transmitting frequency of the driving circuit for most transducer is 40 kHz.Thecircuit of 1 MHz ultrasonic transducer is designed In this paper. It mainly introduces the emissive drivingcircuit and the receiving circuit design and the detailed function of them. Finally, the experimentalplatform is built, and the circuit of input and output were tested. Experiments show that the transducer' s...
上传时间: 2022-04-28
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以STM32F103C8T6为核心,设计了无刷直流电机控制器硬件电路。电路主要包括IR2310构成的PWM驱动电路、IRF3808构成的逆变电路、增量式旋转编码构成的速度反馈电路。控制器具有CAN和RS232通信接口,可与计算机或PLC构成速度或位置伺服系统。利用由xPC目标搭建的半实物仿真平台对PI参数进行整定。测试了控制器的速度伺服响应性能,给定速度为2400rpm时,控制器响应时间为0.32s。实验结果表明,系统工作可靠,稳定性好,响应速度快,可以满足上肢康复机器人的机械臂速度控制性能要求。The hardware circuit of Brushless DC motor controller is designed by taking STM32F103C8T6 as the core,which mainly includes PWM driving circuits made up of IR2310,inverter circuit formed by IRF3808,speed feedback circuit composed of incremental rotary encoder and so on.Speed servo control system or position servo control system can be composed of BLDM controller with computer or PLC through CAN communication interface or RS232 serial communication interface.By using the hardware in the loop simulation platform built by xPC target,the PI parameters are set up.The Speed servo response performance of the controller is tested.When the speed is 2 400 rpm,the response time of the controller is 0...
上传时间: 2022-05-07
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说明:Microchip Technology Inc.采用存储容量为1 Kb至1Mb的低电压串行电可擦除PROM(Electrically Erasable PROM,EEPROM),支持兼容串行外设接口(Serial Peripheral Interface,SPI)的串行总线架构,该系列器件支持字节级和页级功能,存储容量为512 Kb和1Mb的器件还通常与基于闪存的产品结合使用,具有扇区和芯片擦除功能。所需的总线信号为时钟输入(SCK)线、独立的数据输入(S1)线和数据输出(SO)线。通过片选(CS)输入信号控制对器件的访问。可通过保持引脚(HOLD)暂停与器件的通信。器件被暂停后,除片选信号外的所有输入信号的变化都将被忽略,允许主机响应优先级更高的中断。整个SPI兼容系列器件都具有标准的8引脚PDIP和SOIC封装,以及更高级的封装,如8引脚TSSOP,MSOP.2x3DFN,5x6 DFN和6引脚SOT-23封装形式。所有封装均为符合RoHS标准的无铅(雾锡)封装。引脚图(未按比例绘制)
上传时间: 2022-06-20
上传用户:fliang
German universities and scientists have repeatedly set the intermational standard in drive technology. Identification and active compensation of natural frequencies in oscillatory mechanics, status controls with monitoring structures incorporating acceleration sensors, adaptive compensation of measurement system deficiencies, self-adjusting detent torque compensation… everything invented with only a single aim in mind: to continue improv-ing the motion control, dynamics, precision and processing speed of your machines. For the industrial applicabability of this technology scientific publications in proceedings and laboratory test rigs are not enough. These features consequenty need to be converted into cost-efficient and easily manageable products. That 's exactly what we have done.So in future, if you should need more than today ' smarket can offer you, now everything isgoing to be alright. With our new high-performance ServoOne drive series you will experi-ence
标签: servoone
上传时间: 2022-06-24
上传用户:kingwide
摘要:介绍了以FreeModbus协议找在嵌入式抢占实时操作系统μC/OS-l的STM32平台上,成功实现了Modbus协议的移植。通过详细分析FreeModbus协议花并编写STM32F103VET6微处理器的底层驱动,成功实现了工业Modbus协议RTU和ASCll两种模式的通信功能。测试结果表明,在实际工业生产控制和仪表开发中,应用Freemodbus协议,完全符合工业数据采集、实时控制和数据处理等厂级重复性和精确度要求,在一定程度上降低了工业仪表开发的周期及成本。关键词:实时操作系统,uC/OS-ll,FreeModbus,Modbus协议,STM32Abstract:This paper introduces FreeModbus stack transplanted to the STM32 platform which has been embedded in the preemptive real-time operating system uC/OS-ll,in order that the transplantation of the Modbus protocol is successfuly im-plemented.The FreeModbus stack is analyzed in detail and STM32F103VET6 microprocessor underlying driver is writed,so that the two Modbus industrial communication function RTU and ASCll are successfully realized.Keywords:time operating system,uC/OS-ll,.FreeModbus,Modbus协议,STM32
标签: freemodbus 通信协议
上传时间: 2022-06-25
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Legal Disclaimer Lenze Semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. Lenze Semiconductor disclaims any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product.Lenze Semiconductor does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers using or selling Lenze Semiconductor products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Lenze Semiconductor for any damages arising or resulting from such use or sale.
上传时间: 2022-06-25
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EtherCAT 是一利1应用于工厂向动化和| 流程向动化领域的实时工业以太网现场总线协议,是工业通信网络国际标准IEC6 11 58 和IEC6 1784 的组成部分。本书介绍了: 实时工业以太网技术进展、EtherCA丁系统组成原理、EtherCA丁协议、从站专用集成电路芯片ETIIOO 、ETllOO 从站硬件设计实例、EtherCAT 用于伺ßfÆ驱动器控制应用协议CoE 利、So E 、Windows XP 操作系统下EtherCAT主站驱动程序设计、基于微处理器的EtherCAT 从站驱动程序设计和| 开发实例。本书可作为工业向动化和| 计算机控制专业研究生教材或教学参考书,亦可作为EtherCAT 协议开发技术人员的工具书。
上传时间: 2022-07-04
上传用户:xsr1983
电力电子七大名校视频教程及配套讲义,看完一两套,掌握电力电子技术也是so easy!文件较大,存在百度网盘,附件中提供了分享链接和提取码,打开即可转存或下载
标签: 电力电子技术
上传时间: 2022-07-25
上传用户:
电机学六个名师主讲视频教程及配套讲义,看完一两套,掌握电机学知识so easy!文件较大,存在百度网盘,附件中提供了分享链接和提取码,打开即可转存或下载。
标签: 电机学
上传时间: 2022-07-25
上传用户:zhanglei193