Description: 低频数字式相位测量仪；
此系统由相位测量仪、数字式移相信号发生器和移相网络三部分组成。为使系统更加稳定，使系统整体精度得以保障，本电路两块T89C52为核心控制器件分别控制相位测量、数字式移相信号发生,在数字式移相信号发生部分采用了锁相技术、CPLD等技术, 使输出波形精度大大提高，并可对频率自动校验，提高频率稳定性。-low-frequency digital phase-measuring instrument; This system consists of phase-measuring instrument, digital phase shifting generator and phase three network components. To make the system more stable, the overall accuracy of the system can be protected, the two T89C52 circuit control devices at the core respectively phase measurement control, digital believe the shift occurred, the digital shift occurred some believe that the use of lock-in technologies, such as CPLD technology, the output waveform accuracy greatly improved, and can automatic calibration frequency, frequency stability. Platform: |
Size: 433519 |
Author:逸飞 |
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Description: 随着精准农业的发展，农业种植和农业研究人员需要一种手持式NDVI测量仪，以便对农作物长势进行定量测量。本文讨论了一种手持式NDVI测量仪的完整设计过程，详细论述了设计原理，并给出了详尽的单片机程序、设计电路原理图及PCB图。该NDVI测量仪采用太阳光作为光源，光电探测器采用滤光片和光敏二极管实现，用AT89C51单片机控制。其具有结构简单、成本低、轻便、低功耗的特点。-With the development of precision agriculture and farming, and agricultural researchers need a handheld NDVI measuring instrument, in order to crop growth for quantitative measurement. This paper discusses a handheld meter NDVI the integrity of the design process, discussed in detail the design principles, and gives a detailed SCM procedures, circuit schematics and PCB plans. The NDVI measuring instrument used sunlight as a light source, photodetector using filters and photodiode realized, with AT89C51 control. Its structure is simple, low cost, lightweight, low-power characteristics. Platform: |
Size: 351129 |
Author:秦丽 |
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Description: 随着精准农业的发展，农业种植和农业研究人员需要一种手持式NDVI测量仪，以便对农作物长势进行定量测量。本文讨论了一种手持式NDVI测量仪的完整设计过程，详细论述了设计原理，并给出了详尽的单片机程序、设计电路原理图及PCB图。该NDVI测量仪采用太阳光作为光源，光电探测器采用滤光片和光敏二极管实现，用AT89C51单片机控制。其具有结构简单、成本低、轻便、低功耗的特点。-With the development of precision agriculture and farming, and agricultural researchers need a handheld NDVI measuring instrument, in order to crop growth for quantitative measurement. This paper discusses a handheld meter NDVI the integrity of the design process, discussed in detail the design principles, and gives a detailed SCM procedures, circuit schematics and PCB plans. The NDVI measuring instrument used sunlight as a light source, photodetector using filters and photodiode realized, with AT89C51 control. Its structure is simple, low cost, lightweight, low-power characteristics. Platform: |
Size: 351232 |
Author:秦丽 |
Hits:
Description: 低频数字式相位测量仪；
此系统由相位测量仪、数字式移相信号发生器和移相网络三部分组成。为使系统更加稳定，使系统整体精度得以保障，本电路两块T89C52为核心控制器件分别控制相位测量、数字式移相信号发生,在数字式移相信号发生部分采用了锁相技术、CPLD等技术, 使输出波形精度大大提高，并可对频率自动校验，提高频率稳定性。-low-frequency digital phase-measuring instrument; This system consists of phase-measuring instrument, digital phase shifting generator and phase three network components. To make the system more stable, the overall accuracy of the system can be protected, the two T89C52 circuit control devices at the core respectively phase measurement control, digital believe the shift occurred, the digital shift occurred some believe that the use of lock-in technologies, such as CPLD technology, the output waveform accuracy greatly improved, and can automatic calibration frequency, frequency stability. Platform: |
Size: 433152 |
Author:逸飞 |
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Description: 低频数字式相位测量仪（华中科技大学）-Low-frequency digital phase-measuring instrument (Huazhong University of Science and Technology) Platform: |
Size: 958464 |
Author: |
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Description: 单片机脉搏测量仪源程序,全部的程序加最后的成品，内有22个程序-Single-chip pulse measuring instrument source, all the procedures plus the finished product, there are 22 procedures Platform: |
Size: 35840 |
Author:一帆 |
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Description: 该文件中是关于一些VHDL许多编程实例以及源码分析，希望对VHDL爱好者有用。卷4包括低频数字相位测量仪、电压控制LC振荡器-The document is on a number of VHDL source code in many programming examples and analysis, in the hope that useful VHDL enthusiasts. Volume 4, including the low-frequency digital phase-measuring instrument, voltage-controlled LC oscillator Platform: |
Size: 1815552 |
Author:shengm1 |
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Description: 采用单片机和可编程逻辑器件作为低频数字相位测量仪核心部分-Single-chip computer and programmable logic device as a low-frequency digital phase measurement the core of the Platform: |
Size: 66560 |
Author:peng |
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Description: 采用激光扫描与CCD探测系统的大型工件平行度垂直度测量仪，以稳定的激光束为测量基线，配以回转轴系，旋转五棱镜扫描出互相平行或垂直的基准平面，将其于大型工件的各个面进行比较。在大型工件的安装或测量时，可用本仪器测量面向间的平行度或垂直度。(The stable laser beam is taken as the measuring baseline, and the rotary axis system is rotated together. The five prism is rotated to scan the parallel or vertical datum plane. In the installation or measurement of large workpieces, the instrument can be used to measure the degree of parallelism or perpendicularity to the inter - face.) Platform: |
Size: 130048 |
Author:碧海童年 |
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Description: 用单片机实现电阻（不同阻值范围）与电容的测量(The measurement of resistance (different range of resistance) and capacitance by single chip microcomputer) Platform: |
Size: 120832 |
Author:only_0h0x |
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