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电动电子车速里程表的研究 总被引:1,自引:0,他引:1
介绍一种新型电动电子车速里程表,霍尔速度传感器,里程计数脉冲的产生以及步进电机的驱动和BL2115集成电路在电动电子车速里程表中的应用. 相似文献
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主要阐述了一种基于霍尔元件的电动自行车的速度里程表的设计。它以STC89C51单片机为核心,采用A44E霍尔传感器测量转数实现对电动自行车里程/速度的测量统计,还具有系统掉电时保存里程信息的功能,并能将电动自行车的里程数及速度用LCD实时显示。 相似文献
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本文介绍一种新型电动电子车速里程表,以及霍尔速度传感器,里程计数脉冲的产生,步进电机的驱动和BL2115集成电路在电动电子车速里程表中的应用。 相似文献
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基于高速单片机和复杂可编程逻辑器件(CPLD)设计了一种具有霍尔位置传感器接口电路、电流采样电路以及编码器接口电路的无刷直流电机伺服控制器.该控制器可以实现无刷直流电机的有位置传感器控制和无位置传感器控制.以霍尔位置传感器的位置信号作为电机的换向信号并对该信号进行六倍频处理作为速度反馈,从而实现对电机的转速控制,给出了该控制系统的硬件结构设计和软件流程设计.试验结果表明:该无刷直流电机控制系统能够较好地实现电机的转速控制,为电机控制系统的设计提供了新思路. 相似文献
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基于PLC电机测速系统的设计 总被引:1,自引:0,他引:1
介绍了利用PLC及霍尔传感器设计的电机测速系统,该系统通过4位8段数码显示管实现数据输出,方便直观,重点阐述了电机测速系统的基本工作原理及硬件构成,并编写了相应的程序,系统构建成本低,且可获得高精度和高可靠性的电机速度测试数据。 相似文献
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采用虚拟仪器控制技术,利用CS3020霍尔磁性开关,对电机转速测量,实时采集电机的实际工作参数,以LabVIEW为平台,实现了对电机工作特性参数曲线的可视化测定,并对工作特性进行分析与处理。实验结果表明,所设计的系统方案合理可行,电机工作特性测试方便准确。 相似文献
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采用新型霍尔开关传感器和8031单片机研究成功智能式汽车速度里程表。本文阐述智能式汽车速度里程表的工作原理和程序流程图,介绍仪表的实验结果、性能指标、结构特点和开发应用前景。 相似文献
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《Measurement》2016
In strap-down gyro-compass in-motion alignment, the alignment accuracy depends not only on the quality of the gyroscopes and accelerometers, but also on the accuracy of the velocity provided by the aiding sensors such as odometers. To improve the accuracy of the in-motion alignment, real-time accurate odometer velocity estimation is required. In this paper, the effect of the noise of the odometer velocity on strap-down gyro-compass in-motion alignment accuracy is presented, based on the strap-down gyro-compass algorithm. A velocity tracking model is designed as the state model, to describe the relationship between and among the vehicle’s velocity, acceleration and jerk in the vehicle frame. Based on the velocity equation applied to strap-down navigation system mechanizations, the vehicle’s acceleration in the vehicle frame can be obtained from the specific forces measured by accelerometers. With the observations including the vehicle’s acceleration in the vehicle frame and the vehicle’s velocity in the vehicle frame obtained from the odometer using the first order difference algorithm, real-time velocity estimates are produced by a Kalman filter. The field test results show that the proposed method can successfully improve the accuracy of the odometer velocity. The comparison with the traditional method highlights the superior performance of the proposed method. 相似文献
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一种廉价的基于霍尔元件的电机转速测量装置的实现 总被引:7,自引:1,他引:6
李娟 《仪表技术与传感器》2002,(1):36-37
介绍了一种廉价的转速测量装置,包括用霍尔传感器和磁钢构成的脉冲发生器,与单片机的接口电路和倍频电路以及所采用的测速算法。 相似文献
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基于霍尔效应的浮子式液位计 总被引:1,自引:0,他引:1
本文介绍了一种新型液位计,它根据霍尔效应,选用了霍尔开关矩阵作为敏感元件,利用磁浮子进行液位指示,满足了高压密封环境下测量液位的要求。 相似文献
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Umar Iqbal Jacques Georgy Walid F. Abdelfatah Michael Korenberg Aboelmagd Noureldin 《仪器科学与技术》2013,41(6):530-566
Integrated global positioning system (GPS) solutions that utilize micro-electro-mechanical systems (MEMS)-based inertial sensors provide a more accurate navigation solution than stand-alone GPS in challenging scenarios. To keep the integrated solution less affected by sensor errors and to decrease the cost, a reduced inertial sensor system (RISS), which consists of only one gyroscope and two accelerometers, together with an odometer and integrated with GPS, is proposed. Tightly coupled integration is a better choice in demanding scenarios, as it can provide GPS aiding even when the number of visible satellites is three or less. However, inaccuracies of pseudoranges measured by the GPS receiver and used as aiding in the RISS/odometer/GPS integration solution will affect the overall positioning accuracy. This article explores the benefits of using parallel cascade identification (PCI), a nonlinear system identification technique that improves the overall navigation solution by modeling residual pseudorange correlated errors to be used by a Kalman filter (KF)–based tightly coupled RISS/odometer/GPS navigational solution. When less than four satellites are visible, the identified parallel cascade model for the still visible satellites is used to predict the residual pseudorange errors for these respective satellites, and the corrected pseudorange value is provided to KF. The performance of PCI for correcting the pseudoranges is examined and verified using road test trajectories and compared to a traditional tightly coupled RISS/odometer/GPS KF solution. The results demonstrate the advantages of this technique in correcting the pseudoranges and enhancing the positional solution. 相似文献
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基于FPGA的高精度霍尔测速方法 总被引:1,自引:0,他引:1
为了解决传统霍尔测速准确性和快速性相互制约的问题,以实现空间用飞轮转速的快速准确测量;分析了霍尔测速误差产生的主要原因,提出了一种改进的周期测速法(T测速法),并给出了基于现场可编程门阵列(FPGA芯片)和硬件描述语言(VHDL)的实现办法;实验表明在同等精度的条件下,该方法速度反馈时间为传统方法的1/18,相对误差优于0.01%,实现了飞轮转速的快速准确测量. 相似文献
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This paper introduces the development of the caliper system for a geometry PIG (Pipeline Inspection Gauge). The objective
of the caliper system is to detect and measure dents, wrinkles, and ovalities affect the pipe structural integrity. The developed
caliper system consists of a finger arm, an anisotropic permanent magnet, a back yoke, pins, pinholes and a linear hall effect
sensor. The angle displacement of the finger arm is measured by the change of the magnetic field in sensing module. Therefore
the sensitivity of the caliper system mainly depends on the magnitude of the magnetic field inside the sensing module. In
this research, the ring shaped anisotropic permanent magnet and linear hall effect sensors were used to produce and measure
the magnetic field. The structure of the permanent magnet, the back yoke and pinhole positions were optimized that the magnitude
of the magnetic field range between a high of 0.1020 Tesla and a low of zero by using three dimensional nonlinear finite element
methods. A simulator was fabricated to prove the effectiveness of the developed caliper system and the computational scheme
using the finite element method. The experimental results show that the developed caliper system is quite efficient for the
geometry PIG with good performance. 相似文献