光电编码器在数控设备中应用与维修

通过光电转换,光电编码器将工作轴上机械位移量转换成脉冲或数字,用于位移、速度及加速度等物理量检测,应用在数控设备伺服驱动、速度检测、返回参考点及刀位检测等方面.根据光电编码器轴伸端轴向和径向不能受力特点,提出其安装方法.由于光电编码器集光、机、电于一体,属于精密测量器件,列举光电编码器防污、防振及防松动等措施.结合光电编码器引起数控机床报警、主轴控制、换刀等典型故障现象,分析维修过程及处理方法,为相关技术人员提供参考.     

PLC在电梯控制中的应用

在用PLC实现电梯控制的基础上，利用旋转编码器的脉冲信号构成位置反馈，实现电梯的位移控制。通过PLC程序设计实现楼层计数、换速信号、门区和平层信号的数字控制，取代井道位置检测装置，提高了系统的可靠性和平层精度。     

用位置锁相环实现机床主轴准停控制

介绍了一咱用于数控车库的精确主轴定位准停的实用方法,数控系统发出Ｍ１９充给单片机８０３１系统。单片机系统通过接收主轴位置编码器的反馈信号,并计算后发出１个模拟量控制主轴驱动系统,主轴减速并稳定到设定值,当主轴运行到预设的角度后即到准停位置停止。     

基于CPLD的AGC系统位置检测接口电路设计

压下油缸位置闭环高精度控制是实现冷轧带材板厚板形高精度控制的基础,缸位移信号的检测精度直接影响油缸位置闭环精度。以CPLD为主控制芯片,利用VHDL硬件描述语言,设计了板厚控制(AGC)系统油缸位置检测接口电路,实现了Sony磁尺等增量编码器形式的信号采集与处理。该位置检测接口电路采集和处理信号速度快,抗干扰能力强,若封装成独立模块,可应用于其他工业领域。仿真和试验验证了所设计的AGC系统位置检测接口电路的可行性。     

磁编码器与检测仪的原理和应用

主要介绍了小型磁编码器的原理和正确安装,安装后如何用检测仪正确的检测以及检测磁编码器的哪些信号,如何根据信号调整编码器位置,最后阐述了主轴编码器正确安装的意义.     

增量编码器式位置检测装置

在用变速驱动电动机控制物体移动位置时可用增量编码器作为传感器来检测电动机移动速度及物体移动位置。图1所示为采用增量编码器的位置检测装置结构方框图。图1中，增量编码器1输出2相增量脉冲(A脉冲，B脉冲)和原点脉冲(Z脉冲)。位置检测装置10由边缘检测电路11、旋转方向检测电路12、增序计数器13、可逆计数器14及位置运算电路15构成。边缘检测电路11按照增量编码器     

光电编码器应用技术概述

<正> 一、前言光电编码器是将传至其输入轴的机械量、位移量转换成二进制代码或两列电脉冲信号的传感器件。如果把代码或电脉冲信号输给显示仪表,那么显示仪表将显示机械运动状态或位置及其变化量等信息。如果     

输电线DTMF八通道转换开关

采用本文介绍的简单电路,通过市电输电线可以远程接通/断开外接8个装置。4位双音多频(DTMF)数据通过市电输电线被发送去接通/断开所指定的装置,这是分别借助8只继电器实现的。按钮开关S1-S8用于去控制8个装置。若任意开关处在上边位置。编码器就发出"off"信号数据,在解码     

一种实用的数控系统中编码器故障诊断方法

为了提高数控系统运行过程的安全性和可靠性,针对此类系统中惯用的位置环反馈装置编码器,分析了故障发生的原因.进而利用一般数控伺服系统中能够提供的速度冗余信号,研究了主元分析法在系统中对编码器丢码、断码故障进行诊断的基本原理和流程.为了验证此诊断方法的有效性,在Matlab平台下进行了仿真实验,结果表明此方法能够对上述编码器故障的发生信息进行准确的诊断,为故障的排除提供了可靠的依据.     

一种基于光电编码器双路测量间距的方法

为了削弱传统五轮仪法测量结果受地表情况的影响,提出了一种基于光电编码器双路测量间距的方法。结合自制的行进装置,把单片机系统采集到的位置信号作为外部中断信号,用来控制计数两路编码器脉冲信号的启停,并利用归纳出的算法得出两个位置信号间的距离。     

Asynchronous measurement and control: a case study on motor synchronization

The synchronization between two electrical motors (master and slave) is studied. To reduce the costs of the master–slave combination, the slave motor is mounted with a very low-resolution encoder (one pulse per revolution). Since the position measurements are asynchronous in time, standard control and analysis techniques are not applicable. Two methods are proposed to deal with these cheap, low-resolution encoders: the hybrid and the asynchronous control scheme. The presented controllers are successfully tested on a real industrial master-multi-slave system as is used for mailing machines.     

Piezoresistive encoders for ratcheting actuation systems

This paper introduces piezoresistive encoders that can provide information on the performance of ratcheting actuation systems, and may be useful in future applications that require position determination. One unique feature of the encoders is that they gain their piezoresistance from the bulk properties of polycrystalline silicon without additional fabrication steps. In this study, two encoders are considered: a parallel-guiding encoder in an on-chip Wheatstone bridge, and a piezoresistive microdisplacement transducer (PMT) encoder in an on-chip Wheatstone bridge. In tests, the encoders each generated measurable signals, with the PMT encoder providing the best sensitivity. The PMT encoder operated at actuation frequencies up to 920 Hz and produced a signal between 2 V and 3.2 V (applied gain of 1000). The PMT encoder produced unique signals corresponding to distinct ideal and non-ideal behaviors of a ratchet wheel actuation system.     

BiSS接口的光电编码器数据读出研究

高精度的光电编码器作为位置传感器广泛应用于伺服系统中,双向同步串行接口(Bidirectional Synchronous Serial Interface,简称BiSS)由于速度快,抗干扰能力强,越来越广泛地用于连接编码器和控制器;为了实现BiSS接口传感器数据的读取,提出了两种读取数据的方式:微控制器方式和CPLD方式,两种方式都是用端口产生时钟,通过差分器件把时钟发送给光电编码器,同步接收光电编码器返回的差分n位位置数据、2位状态数据和6位CRC校验码;微控制器或CPLD利用位置和状态数据运算产生CRC校验码,如果运算产生的CRC和接收到的CRC不一致,说明传输过程出错;实验结果表明,两种方式都具有高可靠性,CPLD方式的快速性更高,通用性更强。     

室外移动机器人TYIRV-I的定位系统的设计与实现

定位系统是保证准确避障和导航的必要条件,只有准确稳定的定位才能够准确避障和导航,所以定位系统在室外移动机器人中是不可缺少的组成部分。本文介绍室外移动机器人TYIRV-I的组合定位系统,即GPS、磁罗盘和光码盘组合定位,其中,GPS虽然能够提供较精确的位置信息,但是会由于遮挡等原因导致数据无效。磁罗盘和光码盘通过航位推算得到位置信息,短距离定位效果较好,但存在严重的累计误差。对以上两种定位方法进行信息融合形成GPS、磁罗盘和光码盘组合定位,取长补短,取得较好的效果。实践证明,该定位系统具有较高的准确性和稳定性,能够满足移动机器人的定位和导航需要。     

轴角编码器在同步丝杆运动中的应用

介绍了增量式和绝对式编码器在同步丝杆控制中的应用和软件编制。     

Feed-axis gearbox condition monitoring using built-in position sensors and EEMD method

This paper describes a kind of feed-axis gearbox condition monitoring system using the built-in position sensors such as motor encoders and linear scales with high resolution and high precision, which is more directly related to machine dynamics and is sensitive to the early and weak fault. To obtain the position information, several data acquisition approaches for open numerical control systems (NCs) and commercial NCs are suggested. Then, the mathematical models between the faults and the position signals are thoroughly investigated. Finally, the ensemble empirical mode decomposition (EEMD) method is introduced to localize the fault of the feed-axis gearbox. The experimental results show that it is effective to use built-in position sensors and EEMD method for on-line monitoring the gearbox state and fault diagnosis.     

Benefits of acceleration measurement in velocity estimation and motion control

The purpose of this work is to investigate the performance of the kinematic Kalman filter (KKF), an accelerometer-assisted velocity estimation method. The most attractive feature of KKF is that it is immune to modeling uncertainties and parameter variations. Conventional velocity estimation methods are analyzed and compared to KKF. It is shown that KKF can perform very well even with low-resolution encoders. A reliable and cost-effective method of measuring angular acceleration is suggested using MEMS accelerometers. Experimental results with low-resolution encoders confirm the superiority of KKF.     

一种C8051F单片机读取SSI信号的设计

目前许多角度编码器将采集后的角度数字量通过SSI接口输出,供处理器读取。基于C8051F单片机内部所带PCA0可编程计数器阵列外设,设计一种适用于读取SSI接口信号的接口。通过实际应用运行,证明该设计方案稳定可靠,并且配置灵活,完全符合SSI接口协议标准。     

Magnetic field distribution of magnetic encoder with TMR sensor using finite element analysis

Microsystem Technologies - Selecting a cost effective magnetic encoder is an important step in electrical machines motor drive system design. Resolvers and high-resolution encoders provide...     

Using the image acquisition capabilities of the optical mouse sensor to build an absolute rotary encoder

In this paper, the optical mouse sensor is proposed as the main sensor of an absolute rotary encoder. The image acquired by the optical sensor is used to read a positioning binary code printed on an internal rotary surface to obtain the absolute rotary position. The two-dimensional image matrix acquisition is more robust than the single reading point approach used in other absolute rotary encoders (with only one pixel) where the position must be coded using random sequence codes. Additionally, the low cost of the optical sensor facilitates the development of inexpensive absolute rotary encoders.