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谁有通用继电器的检测方法？

我现在在做汽车的某型号继电器的离线检测的毕业设计，需要一些关于继电器原理、检测方法等资料。不知道有谁能帮忙？: 问提问者：网友 | 2017-05-25

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中文文摘：航天继电器多余物自动检测方法和研究有着明确的工程应用背景。其目的是通过对原有的微粒碰撞噪声检测（PIND）检测仪输出信号的采样与数据处理，采用一定的算法对其特征进行提取，从而对继电器中有无多余物进行自动识别，以代替不可靠的人工识别。本文从航天继电器多余物自动检测的要求出发，着重于工程应用，采用虚拟仪器的设计技术，进行了基于航天继电器多余物自动检测方法的研究与实践。文章首先概述了数据采集与数据处理的发展状况，明确了虚拟仪器的概念与特点，提出了PC总线的虚拟仪器结构体系，应用这处结构体系，成功实现了具有连续数据采集与波形显示功能的数据采集卡。该系统在40KHz的采样频率下，具有12位系统分辨率，其采样存储深度决定于系统所用的微型计算机扩展内存或硬盘的大小，各项指标均满足了对航天继电器多余物进行自动检测的要求。概括起来，本文主要进行了以下几个方面的工作： 1、根据虚拟仪器的结构与特点，确定了基于PC/AT总线数据采集卡的系统总体结构设计方案。计算机技术的发展与应用给仪器仪表领域带来了深刻的变化，出现了虚拟仪器这种新的仪器设计观点。虚拟仪器在硬件上由几个功能模块组成，通过软件进行组构，其核心是解决系统硬件与软件的标准化，从而提高系统的互用性，使之更易于集成和应用。它强调在通用计算机平台上，通过灵活的虚拟仪器软件和仪器软面板更好地实现仪器的测量和控制功能。利用虚拟仪器的这些特点，可以提供给用户具有更强大的功能、更佳的性能价格比、更易于扩展和应用的仪器系统。2、着重叙述了数据采集卡各功能电路的设计与实现。采用12位AD 1674模数转换苡片，其内部集成了采样保持电路与三态输出缓冲接口电路，便于系统设计与降低成本；选用2K×9位先进先出存储器（FIFO ）芯片作为在板缓冲存储器，该芯片具有独立的全空、半满与全满标志，有效地实现了数据的连续采样功能；采用8254计数/定时芯片产生系统所要求的时钟频率，实现了数据采集的功能与可调参数；采用多种触发方式，丰富了系统功能；采用可编程门阵列（GAL系列）设计实现了PC /AT总线数据采集卡的接口电路；利用硬件与软件等多种抗干扰措施，较好地解决了外界环境对系统的干扰问题。3。系统控制软件的设计依据虚拟仪器软件的要求，完成了数据采集卡设备驱动程序、数据采集部分的控制程序与数据处理部分的应用软件的设计。设备驱动程序提供了硬件与控制软件的接口；数据采集部分的控制软件包括了对系统硬件的管理、对数据采集流程的控制以及虚拟仪器面板的设计。数据处理部分的软件包括了对样本数据的预处理以及谱分析等处理程序。4、着重叙述了对采集到的样本数据所进行的数据预处理与功率谱分析，并在此基础上对该样信号所对应的继电器是否含有微粒进行了软件判断，所提出的算法简单有效，物理意义明确，判断的正确率高于人工判断。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：网友

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