查询词典 frequency meter

Noise Measuring And Analyzing Instrument: Sound Level Meter, Noise Dose Meter, Noise Statistics And Analysis Meter, Noise Person Exposure Meter, Frequency Octave And 1/3 Frequency Octave Filter

噪声测量分析仪器：声级计、噪声剂量计、噪声统计分析仪、个人声暴露计、倍频程和1/3倍频程滤波器

Electronic equipment categories: two core, three core insulated wire conduction test machine, an integrated plug-line tester, polarity tester, full-featured integrated precision wire tester, analog / digital storage oscilloscope, signal generator, the standard signal source, frequency dollars, Millivoltmeter distortion device,Miriam, LCR digital electric bridge, voltage tester, insulation resistance tester, grounding resistance tester, leakage current tester, electronic load, electric parameter measuring instrument, digital power meter, parameter measuring instrument transformers, transformer automatic testing system, transformers ring than phase tester, electrical safety parameter tester, variable frequency power supply, power supply, high-frequency shielding net room, temperature and humidity table, multimeter, power meter, tachometer, anemometer, coating thickness, coating thickness, vibration measuring instrument, the Composite test machines (motors, fans, hair dryer, lamps, fruit juice machine) and so on.

二芯、三芯线材绝缘导通测试机、插头线综合测试机、极性测试仪、全功能精密线材综合测试机、模拟/数字存储示波器、信号发生器、标准信号源、频率计、毫伏表、失真仪、抖晃仪、LCR数字电桥、耐压测试仪、绝缘电阻测试仪、接地电阻测试仪、泄漏电流测试仪、电子负载、电参数测量仪、数字功率计、变压器参数测量仪、变压器自动测试系统、变压器圈数比相位测试器、电器安全参数综合测试仪、变频电源、电源供应器、高频屏蔽网房、温湿度表、万用表、功率表、转速表、风速计、涂层测厚仪、镀层测厚仪、振动测量仪、综合测试机（马达、风扇、电吹风、灯饰、果汁机）等。

Film-based digital frequency meter, and they hope to do graduate design students help!

详细说明：一个基于51片子的数字频率计，希望对做毕业设计的同学有帮助！

FPGA-based realization of the digital frequency meter, text in all the source code, for reference purposes only.

详细说明：基于FPGA数字频率计的实现，文中有所有的源代码，仅供参考。

It is uses the modular unit to construct the system, carries on the digital frequency meter design and the development new method.

它是采用模块化单元构建系统，进行数字频率计设计与开发的新方法。

The frequency- meter also has a simple structure, low cost, high accuracy and simple operation,reduce the cost of the product and facilitate the design and development of new product and so on.

该频率计具有结构简单、价格低、精度高、操作简单、并且降低产品的成本，有利于新产品的设计与研制、等特点。

Constitute a digital frequency meter for each module are given in more detail the design of methods and procedures for a complete design and simulation results.

对构成数字频率计的每一个模块，给出了较详细的设计方法和完整的程序设计以及仿真结果。

Main business: swp series pressure transmitter; thermal instrumentation; temperature and humidity, liquid level, flow, pull, such as weighing sensors, transmitter; ammeter, voltage meter, note the number of mind-meter, and frequency tables, tachometer time relay, temperature controller, PID regulator, etc.; water level control devices and the water level electrode, logger and related supplies; frequency converter, soft start, programmable controllers, industrial control and other support.

主营业务：swp系列压力变送器；热工仪表；温湿度、液位、流量、称重拉力等传感器、变送器；电流表、电压表、记数记米器、频率表、转速表时间继电器、温控仪、PID调节器等；水位控制仪及水位电极、记录仪及相关耗材；变频调速器、软启动器、可编程控制器、工控配套等。

Then the error sources of the reaction type and electron type electric energy mete were analyzed and the theory analysis result through the concrete test have been proved. At last, the main conclusion has been drawn. When the induction type electric energy meter measures harmonics energy, the negative error characteristic appears. The higher the frequency of harmonics is, the greater the error is. The electron type electric energy meter can measure harmonics energy accurately in general cases. Except thermo-electrical conversion type electron type power meter, reaction type and electron type electric energy meter can measure direct current power.

本论文通过分析感应式和电子式电能表的工作原理推导出了电能表计量电能的数学模型；分析了感应式和电子式电能表的误差来源以及谐波对计量的影响，并通过具体的试验对理论分析结果进行了验证；得出了如下谐波对电能表计量影响的主要结论：感应式电能表计量谐波电能时，呈现负的误差特性，谐波频率越高，误差越大；电子式电能表在其频响范围内可以准确计量谐波电能。

Mz and other precision frequency meter.

Mz等精度频率计。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。