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结合东风汽车公司立体仓库自动化改造的实践,着重研究了它的故障自诊断技术,设计开发了立体仓库的故障自诊断系统。 相似文献
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介绍微机控制电梯的故障自诊断功能,对该功能在系统中实现所涉及到的设计方法加以详尽论述,举例阐述该功能在电梯系统运动及工程维修保养工作中所发挥的作用。 相似文献
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由于社会经济的发展,汽车制造业的发展也是日新月异,随着当今社会的汽车电子控制系统越来越复杂,虽然给大众出行带来了便利,但是也给汽车维修人员出了一道难题。自动化、机械化、电子化、专业化的故障自诊断系统在汽车维修工作中显得尤为重要。本文从汽修行业的现状入手,阐述了故障自诊断系统的工作原理,详细介绍了故障代码,以及如何把故障自诊断系统应用到汽车维修工作中去。 相似文献
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基于大型液态运输船船舱的温度、压力、液位测量,设计一套新型的综合参数监控装置。该装置一改传统的测试方式,运用单片机技术,同时根据船用设备的特点,采用三线制方式解决现场变送器、显示仪的供电和数据通讯问题。 相似文献
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机床PLC改造过程中的故障自诊断设计 总被引:1,自引:0,他引:1
介绍了在继电器控制的机床电气系统进行PLC改造过程中,在考虑完成基本控制功能的基础上,利用PLC的功能特点,通过软硬件的设计实现机床设备故障的自动识别和处理的方法,以提高机床的可靠性和避免事故的发生。 相似文献
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冯高头 《机械工人(冷加工)》2001,(6):29-31
下面我们把受迫振动和自激振动的产生原因、诊断和排除措施,分别加以介绍:1.受迫振动(1)受迫振动的振源 受迫振动是由周期性的外力作用而产生的振动,其振源可来自机床内部, 相似文献
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介绍了运用汽车电控系统自诊断功能诊断汽车故障的方法,并举例说明了自诊断系统对故障判定方法的值域判定、时域判定、功能判定、逻辑判定四种方法及汽车自诊断系统异常诊断产生的原因,也介绍了一些运用自诊断系统排除故障的相关方法与技巧。 相似文献
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Jonghwa Won Sung-Hoon Choa Zhao Yulong 《Journal of Mechanical Science and Technology》2006,20(4):505-512
This paper presents an integrated multifunctional sensor based on MEMS technology, which can be used or embedded in mobile
devices for environmental monitoring. An absolute pressure sensor, a temperature sensor and a humidity sensor are integrated
in one silicon chip of which the size is 5 mmX 5 mm. The pressure sensor uses a bulk-micromachined diaphragm structure with
the piezoresistors. For temperature sensing, a silicon temperature sensor based on the spreading-resistance principle is designed
and fabricated. The humidity sensor is a capacitive humidity sensor which has the polyimide film and interdigitated capacitance
electrodes. The different piezoresistive orientation is used for the pressure and temperature sensor to avoid the interference
between sensors. Each sensor shows good sensor characteristics except for the humidity sensor. However, the linearity and
hysteresis of the humidity sensor can be improved by selecting the proper polymer materials and structures. 相似文献
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为了进一步溯源时栅位移传感器磁场耦合过程引起的误差,对时栅位移传感器在构造场中的耦合特性进行研究,并研制了一种基于指数形平面线圈结构的新型直线时栅位移传感器。建立传感器工程构造磁场的数学模型,分析传感器耦合间隙对线圈耦合平面磁场分布的影响,研究不同形状平面线圈的耦合特性;根据传感器的耦合特性,构建了一种新型直线时栅位移传感器测量模型,对该模型进行了电磁场有限元仿真和仿真误差分析,得出该结构最佳感应间隙为0.4 mm;对传感器的结构误差进行了溯源分析,进一步优化传感器的结构;搭建实验平台,利用双层PCB绕线工艺加工传感器定尺和动尺,对优化前后的传感器样机开展对比实验。实验结果表明,设计的基于指数形平面线圈结构的新型直线时栅位移传感器可以有效抑制传感器的四次误差,新研制的传感器样机的原始测量精度在原有的基础上提高了45.8%。 相似文献
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Dong Hwan Kim Young Chil Park Hakyoung Chung 《Journal of Mechanical Science and Technology》2001,15(10):1369-1379
This paper focuses on a development of a sensor system measuring locations of a vehicle to localize a mobile robot while it tracks on the track (location sensor). Also it focuses on a system configuration identifying the vehicle’s orientation and distance from the object while it is stationary at certain station (position sensor). As for the location sensor, it consists of a set of sensors with a combined guiding and counting sensor, and an address-coded sensor to localize the vehicle, while moving on the rail. For the position sensor a PSD (Position Sensitive Device) sensor with photo-switches sensor to measure the offset and orientation of the vehicle at each station is introduced. Both sensor systems are integrated with a microprocessor as a data relay to the main computer controlling the vehicle. The location sensor system is developed and its performance for a mobile robot is verified by experiments. The position measuring system is proposed and is robust to the environmental variation. Moreover, the two kinds of sensor systems guarantee a low cost application and high reliability. 相似文献
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锅炉管道内压力,差压测量系统的研制 总被引:1,自引:0,他引:1
】介绍了由一只静压传感器和一只差压传感器构成的复合式传感器,并且把该传感器与MCS-51系列单片微型计算机通过一定的接口方式相联接,对锅炉管道内压力、差压进行巡回测量、记录。微型计算机对传感器输出信号进行处理。 相似文献
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In order to realize static force measuring and improve the sensitivity of magnetostrictive force sensor, a novel magnetostrictive static force sensor with giant magnetostrictive material rod is presented. A Hall sensor integrated in the sensor is used to measure magnetic flux density variation under force. A special structure surrounding Hall sensor is proposed to improve the sensitivity. The design method of the giant magnetostrictive force sensor is expounded firstly. The magnetic characteristics are analyzed by FEM. A model is developed based on the coupled linear magnetomechanical constitutive equations and the experimental result shows that the model is good at reflecting the force. The optimal bias magnetic field and sensitivity are studied through experiments. The sensor sensitivity is 6.14 times higher than that of the sensor which dose not have a stainless steel ring. The paper lays a foundation for the development of magnetostrictive force sensor with giant magnetostrictive material. 相似文献
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本文提出了一种反射绝对式纳米时栅位移传感器的传感方法。采用反射单列式传感器作为反射绝对式传感器的精密测量部分,记为传感器A。为了实现绝对位移测量,设计了一个与传感器A相差一个周期的反射单列式传感器,记为传感器B,利用传感器A与传感器B相位作差实现绝对位移测量。采用标准印刷电路板技术制作了传感器样机,搭建了实验平台,进行了实验测试。测试结果表明,激励电极引线方式对接收电极带来干扰,从而造成一次谐波误差。为了抑制误差,提出了交叉反射结构和分时方法,交叉反射结构将感应电极与另一端的反射电极引线相连,增大激励电极和接收电极的距离,分时方法通过不同时间段对传感器A和传感器B施加激励信号,并把不工作的电极接地。实验表明该结构和方法相互配合有效的抑制了干扰,最终在400 mm范围内,补偿后实现了±300 nm的测量精度。 相似文献
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以10 mm口径液体涡轮流量传感器为研究对象,经过对传感器内部流场进行分析,提出通过减小靠近叶片顶端的叶片受力面积,提高传感器测量性能的方法。从对特性曲线的分析出发,结合传感器数学模型,提出了一种利用不同流量点的仪表系数平方差Δ(K~2)评价传感器性能的方法。在此基础上,结合CFD仿真和传感器样机实验测试,研究了不同叶轮叶片形状参数对传感器性能的影响。实验结果表明:改变叶轮叶片形状能有效提高传感器的测量性能,切角参数为0.25时,传感器性能最优;此方法同样适用于其他口径涡轮流量传感器结构的优化。 相似文献