voltage spread 中文意思是什麼
voltage spread
解釋
電壓變化范圍-
Application study on low - voltage power line carrier wave spread spectrum communication system
低壓電力線載波擴頻通信系統的應用研究 -
Technique of transmitting data via power line （ pl ） ， a new technique developed in recent years ， is used to automatize the free collecting system in public service and the management of uptown service 。 this article discussed the advantage ， disadvantage and the current state of the power line carrier communication 。 the advantage ， method and current state of using spread spectrum technique in power line communication are discussed 。 then the characteristic of low voltage power network was also compendious analyzed 。 in this paper ， after introducing the principle of ssc ， design of hardware and software of the system are been discussed 。 this system has been put into use ， the result has proved its high stability and reliability
本文研究旨在提供一種利用低壓電力供電網路、低成本、高可靠地實現公共事業收費自動化和小區物業管理智能化的技術應用。討論了電力線載波通信的優、缺點及現狀，擴頻技術在電力線載波通信應用的優點、方式和現狀，並對低壓電力線網路的特性進行了簡單的分析。在闡述了擴頻通信的基本原理的基礎上，本文詳細地介紹了電力載波遠程抄表系統的具體實現，包括硬體模塊和管理軟體本系統已投入運行，具有較高的穩定性和可靠性。 -
The mutual inductor of electric current and voltage mutual inductor play an important role in relay protection. prevent from ct differential to protect and miss movement an important subject that the generatrix is protected on the saturation, put forward two electric current pass zero hour linear to spread person who become put into differential to protect in ct in recent years, avoid ct saturation district, can judge the bus bar trouble correctly
但是在母線區外發生短路故障（特別是故障電流含有大量非周期分量）時， ct會出現飽和現象， ct飽和后，不能正確地傳變一次側電流，從而使二次電流發生嚴重畸變，產生很大的差電流，這樣就容易引起誤動作。防止ct飽和時差動保護誤動作一直是母線保護的一個重要課題，近年來提出的在ct二次電流過零時的線性傳變區投入差動保護，避開ct飽和區，能對母線故障做出正確判斷。 -
According to the theoretical parameters and analysis of clustering identification of noises, and based on the theory of spread frequency communication and bpsk, the remote reading meter system through medium - voltage power line is realized
根據理論參數及噪聲分類識別分析，以直接序列擴頻通信為理論基礎，採用bpsk調制解調，設計了基於中壓電力線的遠程抄表系統。 -
This paper mainly focuses on the noise limiting by means of the direct sequence spread spectrum ( dsss ) and the analysis of the transmission performance of the plc and some digital modulation technology. the contents of the paper is as follows : 1 ) the technical feasibility is proved after simulating noise limiting principle of dsss by means of systemview, the simulation software ; 2 ) a kind of band pass filter ( bpf ) is realized according to the requirement of filter and the principle of butterworth approximation, which satisfies the index of performance of dsss. 3 ) the low voltage plc system includes the sc1128, the specific modulation / demodulation ic, the bpf filter and other circuit components, furthermore, the control function of system is realized by means of the personal computer and the microcontroller
本課題在對低壓電力線的傳輸特性和數字調制技術進行分析的基礎上，將通信理論中的直接序列擴頻技術（ dsss ）用於解決低壓電力線通信的干擾問題，主要研究內容如下： （ 1 ）用通信模擬軟體systemview對dsss技術的通信和抗干擾原理進行模擬分析，分別對時域和頻域下採用dsss技術前後接收信號的頻譜進行分析，驗證dsss技術在本系統中的可行性； （ 2 ）由dsss技術對濾波系統的要求，根據濾波理論分析了巴特沃思型濾波器的逼近原理並設計了合適的濾波電路； （ 3 ）用調制解調晶元sc1128和自行設計的濾波器加之輔助外圍電路，構造出低壓電力線載波通信系統，並採用atmel公司的單片機設計了接收和發射電路的微控制器； （ 4 ）分別對採取抗干擾措施前後輸入和輸出信號進行對比實驗，並對結果進行分析，驗證了dsss技術對干擾信號的抑制作用。 -
This paper presented a general systematic view, application and current development of the power line carrier transmission technology, and clearly compared some existing power line carrier communication chip with each other. then the authors analyze the channel " s characters of low voltage power line, and formed an abstract carrier channel model. using this as its basis, a new kind of transmission technology is designed that adopted transmission technology combining the spread spectrum modulation with channel coding, which can solve the problems above mentioned to a certain degree, and need not pay for high cost
文章不僅全面地介紹了電力線載波通訊技術的特點、應用及其發展狀況，還對目前的電力線載波通訊晶元進行了比較；並通過對低壓電網通道特性的分析和研究，抽象出其載波通道模型，在此基礎上，提出了將擴頻調制和通道編碼相結合的傳輸技術用於低壓電力線載波通信，這可以在很大程度上解決電力線的干擾問題，且不必付出高昂的代價。 -
In the system, the low voltage power line is the first signal tunnel without any other relay equipments between customer terminal and substation collector, public telephone line serves as the second signal tunnel between substation and management center computer. as a breakthrough of conventional concept of electricity meter, this thesis initiate a new concept, namely, intelligent power customer terminal ( shortly, customer terminal ), which is developed with spread spectrum plc communication functional and possesses many advanced functions, such as, in addition to electric energy acquisition, guarding against electricity pilfering, preventing wrong connection, protecting malfunction, remote communication ( for example, remote power supply or halt, remote configuration of electricity meter, remote load control, etc ), and so on
本文首先系統地總結了目前國內外低壓電力網數據傳輸技術的研究現狀和存在的問題，在此基礎上，從理論上論證了在低壓電網上應用擴頻載波數據通信技術的可行性和優越性，並重點論述了擴頻載波技術抗電力線噪聲干擾的機埋；本文提出了一個新穎的基於低壓電力線擴頻載波通信技術的集中遠抄系統的總體方案，即由用戶終端、集中器和電能管理系統所組成的網路系統，其中，用戶終端到配變集中器用低壓電力線作為通道，中間無需其他硬體中繼設備，集中器到電能管理系統用公用電話網作為通道。 -
A system scheme of digital image collection plus spread spectrum communication ( abbreviated as ssc ) is presented in this paper after a full analysis of noise characteristics, attenuating characteristics and impedance characteristics of low - voltage power lines
本文首先介紹了低壓電力線的噪聲特性、衰減特性和阻抗特性，然後提出一種數字圖像採集+擴頻傳輸的系統總體方案。 -
A remote record system is designed using integrated circuit based on direct sequence spread spectrum carrier communication technology and can transfer data from the sender to the receiver via low voltage power line
本文應用擴頻晶元設計了一種遠程抄表系統，它採用直接序列擴展頻譜通信技術，以低壓電力線作為媒介進行通信。 -
At present the special protective devices for busbars in middle and low voltage distribution networks are still not common. only appended to original busbar protections, so the faults occurred in middle and low voltage busbars have to be cleared by back - up relaying with long time delay. thus, some kind of faults may spread which originally could be cleared and tremendous economy loss may appear
在電力系統中35kv及以下電壓等級的母線由於沒有穩定問題，一般未裝設專門母線保護，母線故障要由較長延時的后備保護來切除，使不少本可以得到控制的故障被發展和擴大，造成了巨大的經濟損失。 -
This machine adopts a whole stainless steel packing, the temperature is a number to show automatically control, heat or reduce the heat to all have a signal beacon manifestation, the electric current electric voltage size switches on to all have a manifestation, automatically feeding powder can adjust soon, spread to move part is the bean that the my plant produce product machine appropriation decelerate machine, electrical engineering is the steel plate adjustable type, the machine bottom use of upscale run a round, easy to ambulation, cool off part is automatically circulating water device, the bottom establishes keep of big capacity water tank and heat part is heat preservation economy energy type, normal production can economy in electricity quantity of 30 %, in fact use electricity charges and burn coal basic hold even
本機採用全不銹鋼包裝，溫度是數顯自動控溫，加溫或降溫均有信號燈顯示，電流電壓大小開機均有顯示，自動喂粉可以調速，傳動部分是本廠生產的豆製品機械專用減速機，電機架是鋼板可調型，機器底部用的高檔跑輪，便於移動，冷卻部分是自動循環水裝置，底部設有大容量的儲水箱，加溫部分是保溫節能型，正常生產可節約用電量的30 % ，其實用電費和燒煤基本持平。 -
System scheme of speech coding plus spread spectrum communication was presented based on a full analysis of noise characteristic, attenuation characteristic and impedance characteristic of low - voltage power line. spread spectrum carrier ( abbreviated as ssc ) technology is adopted to overcome problems existing in signal transmission over power line. high quality, low rate mbe compression algorithm was used to complete speech encoding and decoding
在對低壓電力線路的噪聲特性、衰減特性和阻抗特性三個方面充分分析的基礎上，本文提出一種語音編碼+擴頻傳輸的系統總體方案，採用擴頻載波（ spreadspectrumcarrier ，縮寫為ssc ）技術克服電力線傳輸信號存在的問題，採用語音合成質量高並具有較低碼率的mbe壓縮演算法完成語音信號的編解碼。 -
This machine adopts a cold plank packing, temperature means that the needle automatically control, heat or reduce the heat to all have a signal beacon manifestation, the electric current electric voltage size switches on to all have a manifestation and automatically feed powder is certainly and soon, spread to move part is the bean that the my plant produce to product the machine appropriation deceleration machine, the electrical engineering is the steel plate adjustable type, the machine bottom use of upscale run a round, easy to ambulation, heat part is a heat preservation economy energy type, normal production can economy in electricity quantity of 30 %, in fact use electricity charges and burn coal basic hold even
本機採用冷板包裝，溫度是指針自動控溫，加溫或降溫均有信號燈顯示，電流電壓大小開機均有顯示，自動喂粉是定速，傳動部分是本廠生產的豆製品機械專用減速機，電機架是鋼板可調型，機器底部用的高檔跑輪，便於移動，加溫部分是保溫節能型，正常生產可節約用電量的30 % ，其實用電費和燒煤基本持平。 -
A lower voltage power line carrier communication system on spread spectrum technology based on this condition is designed, which is composed of a singlechip computer at89c51 and pl2101b. this article described the hardware and software of the system, and the field - test showed the system is feasible
在此基礎上，開發了基於擴頻技術的低壓電力線載波通信系統，系統主要由at89c51和擴頻通信晶元pl2101b組成，完成了該系統的硬體設計、製作，軟體的編程和調試。 -
This article briefly presented the principle of lower voltage power line carrier technology and spread spectrum technology, and discussed the advantage, the mode, the current state of spread spectrum technology applied to lower voltage power line carrier communication, and analyzed the channel transmission characters of lower voltage power line with mechanical contact
在本文中，簡要闡述了低壓電力線載波技術和擴頻技術的原理，討論了擴頻技術在低壓電力線載波通信中應用的優點、方式和現狀，並通過大量實驗，分析了帶機械接觸的低壓電力線路的傳輸特性。 -
As the terminal of an electric network, the distribution network is directly connected with the users. it is charactered with wide spread line, low voltage level, many devices on the line
配網作為電力網的末端，直接與用戶連接，線路分佈廣，電壓等級低，網上設備數量多。
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