1) frequency modulation technique
调频技术
1.
Because the resources of single chip AT89S8252 be abundant, especially the 2KB EEPROM existence of the proper, makes the system carry out automation demarcate and calibrate; The air compressor in the box adoption frequency modulation technique, thus c.
该设备中的空气压缩机采用调频技术,从而实现了制冷量的PID调节。
2) dechirp technic
去调频技术
3) FSK frequency modulation technology
FSK调频技术
4) frequency control technique
变频调速技术
1.
The application of frequency control technique in power plant and power saving effect;
变频调速技术在电厂的应用及其节电效果
2.
This paper introduces the features of the frequency control technique of AC motor, and expounds the present situation, developing trends and applicability of the converter technique.
介绍了交流电动机变频调速技术的特点,阐述了变频技术的现状和发展趋向及其应用领域。
3.
As a result,AC frequency control technique finds more and more application in power plants.
随着电力系统商业化运营的逐步实施,发电厂的节能降耗日显重要,减少厂用电量以降低生产成本为各电厂所重视,这使得交流变频调速技术在发电厂的应用逐步增多。
5) low frequency modulating technology
低频调制技术
1.
Considering the signal detecting and obtaining of infrared sensor with a weak output,adapted in low frequency modulating technology,used the method of narrow bandpass filter.
对于解决一类适合低频调制技术,且输出信号非常微弱的红外传感器的信号检测和提取,设计采用选频加窄带通滤波器的方法,再应用中位值平均滤波的数据采集方法很好地解决了对这一类红外传感器信号的数据采集。
6) frequency control technology
变频调速技术
1.
The frequency control technology was introduced to solve the problem that the water pump doesn′t work in high-efficiency area and water of hydraulic supply line and pump often perforate because of the affect of flux and pump lift in water plant and pumping station in Henan Oilfield ,discussing the work principle and effect of energy saving.
为解决河南油田水厂泵站的水泵受流量、扬程的影响而不在高效区运行、输水管线经常穿孔漏水的问题,引进了变频调速技术。
2.
This paper expounds the features of the frequency control technology adopted in the Thermoelectricity Co.
阐述了上海青浦工业园区热电有限公司变频调速技术的特点和发电厂耗能情况,介绍了变频调节的基本原理及节能情况。
补充资料：调频-调频遥测系统
采用调频-调频二重调制方式的频分制遥测系统,简称FM-FM遥测系统，属于模拟式遥测系统。FM-FM遥测系统的抗干扰能力强，遥测精度也比较容易得到保证。模拟式遥测系统大都采用这一类系统。下图为 FM-FM遥测系统的框图。各路被测量经变换器变换成电压信号后去控制各路副载波振荡器。副载波振荡器一般采用压控振荡器（即电压控制的振荡器），其振荡频率正比于控制电压,这样就实现了第一次调频。为了防止路际干扰,各路已调副载波先通过低通滤波器，滤去高次谐波，再送到相加放大器形成多路信号，并通过信道调制器对载波调频，这样就实现了第二次调频。已调频的载波由发射天线发送出去。接收端收到遥测信号后先通过解调器解调出多路信号，再送往各分路的带通滤波器，即分路滤波器，把各路已调副载波分离开来。分离出来的已调副载波送到相应的分路解调器，进行第二次解调，就可以得到所传送的模拟信号。美国对 FM-FM遥测系统已经实现了标准化、模块化、系列化。广泛应用模拟集成电路制成标准部件，提高了系统的可靠性和适应性。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条