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誰有通用繼電器的檢測方法？

我現(xiàn)在在做汽車的某型號繼電器的離線檢測的畢業(yè)設計，需要一些關(guān)于繼電器原理、檢測方法等資料。不知道有誰能幫忙？: 問提問者：網(wǎng)友 | 2017-05-25

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中文文摘：航天繼電器多余物自動檢測方法和研究有著明確的工程應用背景。其目的是通過對原有的微粒碰撞噪聲檢測（PIND）檢測儀輸出信號的采樣與數(shù)據(jù)處理，采用一定的算法對其特征進行提取，從而對繼電器中有無多余物進行自動識別，以代替不可靠的人工識別。本文從航天繼電器多余物自動檢測的要求出發(fā)，著重于工程應用，采用虛擬儀器的設計技術(shù)，進行了基于航天繼電器多余物自動檢測方法的研究與實踐。文章首先概述了數(shù)據(jù)采集與數(shù)據(jù)處理的發(fā)展狀況，明確了虛擬儀器的概念與特點，提出了PC總線的虛擬儀器結(jié)構(gòu)體系，應用這處結(jié)構(gòu)體系，成功實現(xiàn)了具有連續(xù)數(shù)據(jù)采集與波形顯示功能的數(shù)據(jù)采集卡。該系統(tǒng)在40KHz的采樣頻率下，具有12位系統(tǒng)分辨率，其采樣存儲深度決定于系統(tǒng)所用的微型計算機擴展內(nèi)存或硬盤的大小，各項指標均滿足了對航天繼電器多余物進行自動檢測的要求。概括起來，本文主要進行了以下幾個方面的工作： 1、根據(jù)虛擬儀器的結(jié)構(gòu)與特點，確定了基于PC/AT總線數(shù)據(jù)采集卡的系統(tǒng)總體結(jié)構(gòu)設計方案。計算機技術(shù)的發(fā)展與應用給儀器儀表領域帶來了深刻的變化，出現(xiàn)了虛擬儀器這種新的儀器設計觀點。虛擬儀器在硬件上由幾個功能模塊組成，通過軟件進行組構(gòu)，其核心是解決系統(tǒng)硬件與軟件的標準化，從而提高系統(tǒng)的互用性，使之更易于集成和應用。它強調(diào)在通用計算機平臺上，通過靈活的虛擬儀器軟件和儀器軟面板更好地實現(xiàn)儀器的測量和控制功能。利用虛擬儀器的這些特點，可以提供給用戶具有更強大的功能、更佳的性能價格比、更易于擴展和應用的儀器系統(tǒng)。2、著重敘述了數(shù)據(jù)采集卡各功能電路的設計與實現(xiàn)。采用12位AD 1674模數(shù)轉(zhuǎn)換苡片，其內(nèi)部集成了采樣保持電路與三態(tài)輸出緩沖接口電路，便于系統(tǒng)設計與降低成本；選用2K×9位先進先出存儲器（FIFO ）芯片作為在板緩沖存儲器，該芯片具有獨立的全空、半滿與全滿標志，有效地實現(xiàn)了數(shù)據(jù)的連續(xù)采樣功能；采用8254計數(shù)/定時芯片產(chǎn)生系統(tǒng)所要求的時鐘頻率，實現(xiàn)了數(shù)據(jù)采集的功能與可調(diào)參數(shù)；采用多種觸發(fā)方式，豐富了系統(tǒng)功能；采用可編程門陣列（GAL系列）設計實現(xiàn)了PC /AT總線數(shù)據(jù)采集卡的接口電路；利用硬件與軟件等多種抗干擾措施，較好地解決了外界環(huán)境對系統(tǒng)的干擾問題。3。系統(tǒng)控制軟件的設計依據(jù)虛擬儀器軟件的要求，完成了數(shù)據(jù)采集卡設備驅(qū)動程序、數(shù)據(jù)采集部分的控制程序與數(shù)據(jù)處理部分的應用軟件的設計。設備驅(qū)動程序提供了硬件與控制軟件的接口；數(shù)據(jù)采集部分的控制軟件包括了對系統(tǒng)硬件的管理、對數(shù)據(jù)采集流程的控制以及虛擬儀器面板的設計。數(shù)據(jù)處理部分的軟件包括了對樣本數(shù)據(jù)的預處理以及譜分析等處理程序。4、著重敘述了對采集到的樣本數(shù)據(jù)所進行的數(shù)據(jù)預處理與功率譜分析，并在此基礎上對該樣信號所對應的繼電器是否含有微粒進行了軟件判斷，所提出的算法簡單有效，物理意義明確，判斷的正確率高于人工判斷。英文文摘: The research of methods of detecting losse particles inside the relays has an unequivocal engineering background in space craft. Its purpose is to automatically test the relays, by th e acquisition and processing of outputs of Particle Impact No ise Detection instrument, and the algorithm of their feature extraction, to determine whether or not they have loose parti cles inside them, furthermore, to take the place of the subje ctive man-made testing method. In this paper, under the consi deration of the require of automatically testing loose partic les inside the relays in spacecraft, the engineering applicat ion is emphasized; the Virtual Instrument (VI) technique is u sed to study and practice the method of automatically detecti ng loose particles inside the relays in spacecraft. First, th e condition of data acquisition and signals rocessing is pres sed; the concept and features of VI are definitely defined; t he structure system of PC-based VI is put forward; and with s uch structure system, a kind of PC-based data acquisition car d intrument is achieved, which has the function of successive data acquisition and waves record. With 40KHz sampling frequ ency, this system has a resolution of 12 bits, and the extend ed memory or hard disk of Personal Computer determines its me mory depth. Its targets meet with the require of automaticall y testing loose particles inside the relays in spacecraft. In summary, the main results of this paper are: 1. The structur es and features of VI determine the design scheme of overall structure of the PC-based data acquisition card instrument. W ith the development and application of computer technology, t here are profound changes in the field of instrument and meas urement. The VI is made up of several hardware functions moul ds, and is organized through software. Its core is to resolve the standardization of hardware and software in order to enh ance the capacity of system's integrity, mutual utility and a pplication. Users can assemble much better measuring system i n use of the features of VI's function-user-defined, future- f unction-reamed, high measuring accuracy and speed. 2. The har dware designing process of the data acquisition card instrume nt with two analog inputs is analyzed in detail. Some advance d techniques such as First-In-First-Out memory (FIFO) memory, software virtual panel, flexible logic control circuit and t he full use of resources of PC are used in the overall layout. Some hardware and software techniques are used to minimize t he disturbance in or out of the system. 3. The system managem ent software, which includes the equipment driver model, the management software of data acquisition and the application s oftware of data processing are introduced. The equipment driv er model provides a port between hardware and management soft ware; the management software of data acquisition provides co ntrols of system hardware, data acquisition and virtual panel; the application software of data processing provides some pr e-processing methods and the analysis of signal power spectru m. 4. The process of the sample data pre-processing and analy sis of the power spectrum are introduced in detail. Judgement s are made to determine whether or not the relays in spacecra ft have loose particles inside them. The algorithms are simpl e, efficient and with clear physical meanings, the rate of co rrection is high than that of the subjective man-made testing method.: 回答者：網(wǎng)友

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