共查询到18条相似文献,搜索用时 140 毫秒
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线性光耦器件IL300-F-X009原理及其应用 总被引:1,自引:0,他引:1
介绍在采集交流永磁同步电机母线电流时,为防止外界的各种干扰,必须将霍尔传感器测量系统和DSP数字微处理器进行电气隔离。为了能更精确地传送模拟信号,进行电压检测,用线性光耦(IL300-F-X009)隔离是最好的选择。线性光耦输出信号随输入信号变化而成比例变化,它为模拟信号传输过程中,隔离电路的简单化、高精度化带来了方便。 相似文献
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在生产过程中,电机的应用十分广泛,随着生产的不断发展,对电机转速的测量就显得十分必要,同时对电机转速的测量提出了更高的要求。本文设计了一种以51单片机作为主控制器,使用霍尔传感器进行测量的直流电机转速测量系统。完成了系统的实物搭接,且调试成功,满足设计要求。本系统采用集成霍尔传感器敏感速率信号,具有频率响应快,抗干扰能力强等特点。 相似文献
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本文提出了基于霍尔传感器的转速测量电路,通过在直流电机的转子上安装金属齿轮,在电机的带动下模拟被测物体的转动,使得霍尔传感器两端产生感应电动势,信号调理电路将其转换成数字脉冲信号,单片机通过统计脉冲个数从而实现转速的测量。 相似文献
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采用两路霍尔传感器作为敏感元件,测量传动齿轮两个齿尖之间的转动时间,并以脉冲信号的方式传输给单片机,单片机可由脉冲信号的时间和相位差计算传动齿轮的转速和判断转动方向。 相似文献
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本文提出了一种基于线性霍尔传感器的角度测量的非线性校正方法,在固定磁铁上绕制一定匝数的线圈,线圈产生的磁场与磁铁产生的磁场垂直,空间磁场为上述两个磁场的叠加,固定霍尔传感器的位置,同时保持控制电流不变,让磁铁绕霍尔传感器旋转产生角度的变换,霍尔传感器输出电压也将产生变化。对增加线圈和不增加线圈两种结构进行理论分析和仿真,从仿真结果看,霍尔电压与夹角的关系曲线明显线性增加,测量范围扩大,在角度测量中具有独特的优点。同时设计了传感器硬件电路,进行了实验测量,仿真和实测结果表明:该方法具有电路简单、实时性好、频率相应快、抗干扰能力强、安装调试方便等特点。 相似文献
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针对无刷直流电机采用低分辨率霍尔传感器进行转子位置估计存在角度误差问题,提出基于反电势观测器和锁相环的误差补偿方法。根据霍尔传感器测量电角度原理,分析电角度固有安装误差和算法估算误差的原因,提出了结合反电势观测器重构角度误差,采用锁相环进行相位计算,实现对电角度误差进行补偿。在48V无刷直流电机上进行实验,通过对补偿后电角度和相电流响应比较,证明新方法能够有效的改善霍尔传感器角度误差问题,改善电流响应,实现对转矩脉动的抑制,能获得高效控制性能。 相似文献
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为提高传统硅压阻式压力传感器的测量精度,针对性地设计与实现了一种带有迟滞误差校正功能的阵列式无线压力传感器系统。该系统采用了硅压阻式传感器阵列和高精度模数转换器AD7794,以STM32微处理器作为数据采集和信号处理的核心部件,并通过无线蓝牙传输模块将测量数据发送至手机接收端,以手机APP显示测量结果有利于用户对压力实现无线监测。针对硅压阻压力传感器的迟滞非线性,基于最小二乘法与函数校正法对压力传感器阵列的输出信号进行了非线性和迟滞误差补偿,结果表明:迟滞误差从原来的±0.152%降为±0.077%,,有效地提高了系统的测量精度。 相似文献
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HongZhe Jin Hao Lu SeungKeun Cho JangMyung Lee 《Mechatronics, IEEE/ASME Transactions on》2007,12(5):549-556
This paper demonstrates a new noncontact electronic joystick using a single Hall sensor that detects a horizontal vector in the magnetic field. Furthermore, in this paper, the nonlinear characteristics between the output of the Hall sensor and the movement of the joystick bar are modeled and compensated to be linear. The dynamic horizontal vector of the magnetic flux is detected by the Hall sensor while a permanent magnet is rotated with the joystick bar, which has a 2-D detecting area. With the nonlinear modeling equations, the Hall sensor output became linear and accurate for the 2-D joystick movement. Through real experiments, it is shown that the single Hall sensor structure mechanism is superior to the dual sensor structure in sensing 2-D motion without offset. 相似文献
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本文使用微处理机及RAM,ROM的数据存储器,来说明线性预测编码技术在处理语音信号中的实用性及优越性,同时,还使用了固化开发和微程序控制技术。 相似文献
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Soon Yong Yang Min Cheol Lee Man Hyung Lee Arimoto S. 《Industrial Electronics, IEEE Transactions on》1998,45(3):376-384
In order to develop a stroke-sensing cylinder for automatic excavators equipped with Hall sensors of GaAs type, a measuring test facility is set up and used in investigating the design parameters. The measuring system itself is a kind of XZ table with two moving axes in X and Z directions, respectively, on which sensing parts, including Hall sensors, are installed. Furthermore, to attain a high precision of movement of the measuring system, a new sliding mode control is introduced, which diminishes chattering in the control loop by setting two dead zones along the switching line. The unknown parameters for sliding mode control are estimated by a signal compression method. The output signal from a Hall sensor was analyzed by using a measuring instrument. In particular, the detected signal according to the Hall sensor's movement on the piston rod, which has a magnetic scale, was investigated and the vertical distance between the Hall sensor and the piston rod, which gives direct effects on the detected signal, was obtained. Based on these results, the stroke-sensing cylinder was designed and fabricated 相似文献
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针对电源系统需要为系统中微处理器、传感器、信号调理电路、无线通讯模块等提供工作电源的目的,提出一种生物信息检测系统中无线传感器网络(WSN)节点的电源设计方案。除了通过内部3.7 V锂电池,振动产生的机械能也可以用来提供能量。系统工作过程中能自动对供电方式进行选择,并完成对锂电池的充电任务。节点采用带有8051内校的CC2430无线射频芯片,通过有效的动态电源管理和唤醒休眠机制的软件设计,针对生物信息检测系统实现了一种低功耗的能量自供给的无线传感器节点电源设计。 相似文献
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Automatic calibration of Hall sensor microsystems 总被引:1,自引:0,他引:1
In many applications, a Hall element is used for contact-less measurement such as linear and angular positions, electrical current, power and energy, etc. The Hall element fabricated by means of CMOS technology features mediocre characteristics [R.S. Popovic, Z. Randjelovic, D. Manic, Integrated Hall-Effect Magnetic Sensors, EMSA, Germany, 2000; R.S. Popovic, Hall Effect Devices, Adam Hilger, Bristol, Philadelphia, New York, 1991]. It gives a weak output signal of the order of a few mV. This signal is often corrupted by sensor offset, noise, temperature and aging drift. This paper deals with the state of the art and main techniques capable to detect and compensate these issues. Case studies using mentioned techniques are also summarized. 相似文献