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正杭州钱江称重技术有限公司(杭州振华工业称重科技有限公司)专业研发、设计、制造各种规格型号的电阻应变式称重测力传感器、称重与测力仪表、各类型的无基坑不断轨轨道称量系统历经三十余年。公司坚持"以人为本,科技是第一生产力"的理念,不断创新进取,荣获多项自主知识产权的发明与实用新型专利,先 相似文献
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一、前言韶钢3#铁水秤是一台200t的GCU-S型双台面的动态电子轨道衡,它是一种能在铁路车辆不停车、不摘钩的情况下,对车辆重量进行动态连续称量的称量设备。该轨道衡采用整车称量的计量方式,能自动识别车头和铁水包,只对铁水包重量进行称量。该轨道衡因长时间重负荷运行,造成承重台面轨、中间过渡轨、引线轨出现裂纹,称重传感器支承基础出现松动,称重传感器连接件、过渡器磨损严重,称重台面 相似文献
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磁弹性传感器是根据磁性材料的磁弹性效应建立起来的新型测力传感器。它不仅可以用来进行力的无损检测,还可以用来进行自动控制与调节,已在许多工业部门得到了应用。但是,目前对适用于这种传感器的磁性材料还研究得不够。本文根据国内外文献及试验资料,简要介绍可用于磁弹性传感器的几种磁性材料及其有关特性和应用特点以及使用现状,并就材料的选用提出某些看法。 相似文献
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本文在理论上研究了一种采用串联多自由度应测力传感器补偿动态力测量误差的方法,在数学上根据串联多自由度应变测力传感器的输入输出传递函数建立了这种传感器的状态方程,通过对传感器数学模型的分析,提出了一种消除动态力测误差的方法,在本文的假设情况下采用这种方法在理论上可以完全消除测力传感器的动态测量误差。 相似文献
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目前在称重、测力传感器(简称传感器)的检定规程或产品技术条件中,对传感器的性能指标、精度计算,大部分采用非直线度L、滞后H、不重复度R、综合误差E等分项指标,或以前述几项性能指标,用均方根合成一个总精度来评定。但是,当传感器与显示仪表、稳压电源等组成一个称重或测力系统时,实际上被称重或 相似文献
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压磁式测力传感器是利用铁磁材料的压磁效应来测量受力大小的.因其具有抗冲击、过载能力强、耐高温和潮湿、输出信号大、输出阻抗低等特点,故而在较为恶劣的环境中得到了广泛的应用. 相似文献
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研究出无缝线路上钢轨在温度发生变化时轴向温度内力的一种有效检测手段,并提出了新颖的理论和方法.通过建立无缝线路轨道力学模型分析温度内力变化时侧向力及其作用位移的变化规律,研制了新型无缝线路温度内力测试系统,结合标定试验对上述规律进行了参数修正,最终实现对钢轨温度力的精确测试.此项技术在实践应用中取得良好效果. 相似文献
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压电传感技术在轮轨力实时监测中的应用探讨 总被引:3,自引:1,他引:2
目前轮轨力测试传感元件大多采用应变片,但应变片存在零漂、抗干扰能力差、测试系统稳定性差的问题,不满足高速重载铁路轮轨力实时监测对传感元件的要求,针对这一情形,提出了基于压电传感技术的轮轨力实时监测方法。首先,根据轮轨相互作用的特点和轨道系统约束条件,以及压电应变传感特性,提出了轮轨垂向力和横向力测试原理。然后,实验研究了PVDF压电传感器的动态特性、抗电磁干扰、抗零漂、可重复性等性能,并与普通电阻应变片进行了对比,论证了应用压电传感技术进行轮轨力实时监测的可行性。最后通过有限元仿真计算验证了所提出的轮轨力监测原理的正确性。 相似文献
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This paper describes a wireless, remote query glucose biosensor using a ribbonlike, mass-sensitive magnetoelastic sensor as the transducer. The glucose biosensor is fabricated by first coating the magnetoelastic sensor with a pH-sensitive polymer and upon it a layer of glucose oxidase (GOx). The pH-responsive polymer swells or shrinks, thereby changing mass, respectively, in response to increasing or decreasing pH values. The GOx-catalyzed oxidation of glucose produces gluconic acid, inducing the pH-responsive polymer to shrink, which in turn decreases the polymer mass. In response to a time-varying magnetic field, a magnetoelastic sensor mechanically vibrates at a characteristic resonance frequency, the value of which inversely depends on sensor mass loading. As the magnetoelastic films are magnetostrictive, the vibrations launch magnetic flux that can be remotely detected using a pickup coil. Hence, changes in the resonance frequency of a passive magnetoelastic transducer are detected on a remote query basis, without the use of physical connections to the sensors.The sensitivity of the glucose biosensors decreases with increasing ionic strength; at physiological salt concentrations, 0.6 mmol/L of glucose can be measured. At glucose concentrations of 1-10 mmol/L, the biosensor response is reversible and linear, with the detection limit of 0.6 mmol/L corresponding to an error in resonance frequency determination of 20 Hz. Since no physical connections between the sensor and the monitoring instrument are required, this sensor can potentially be applied to in vivo and in situ measurement of glucose concentrations. 相似文献
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Magnetoelastic sensor techniques have the unique characteristics of being able to wirelessly detect resonant frequency shifts of a magnetoelastic foil in response to differences in the foil mass. However, the mathematical expression that links the resonant frequency shift with the change in the mass of the magnetoelastic foil is rarely reported. Furthermore, this relationship is not easy to ascertain due to potential changes in the Young's modulus of the sensor upon a change in mass loading. In this paper, we have shown that adsorption of water vapor from the gas phase by magnetoelastic ribbons coated with a two layer porous thin film (SiO2/Pt-TiO2) induces large changes in the effective Young's modulus of the sensor. We also demonstrated that the change in Young's modulus upon mass loading can be eliminated from the relationship between mass loading and shifts in resonant frequency by using a technique that we refer to as the two different length sensor method (TDLS). This methodology permits the conversion of the magnetoelastic sensor into a microbalance. From data presented in this paper, we illustrate that the sensitivity for the same sensor can range between 214 Hz/mg for mass loadings of Au to 438 kHz/mg for acetone. In the case of water adsorption, frequency shifts varies from 20.0 kHz/mg when Deltam 相似文献
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