共查询到20条相似文献,搜索用时 15 毫秒
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利用电磁感应的原理设计了一种酸碱式电磁浓度传感器,对影响测量模型的干扰因素进行分析并设计出扫频谐振检测和峰值检波电路,消除了频率及元器件性能微小变化对测量产生的影响。最后分析了温度对测量结果的影响,并对温度补偿提出具体解决方案。实验结果表明:此系统测量灵敏度较高,抗干扰能力强,测量范围在2%~15%的盐酸浓度时线性较好。 相似文献
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Yu. I. Vinogradov V. S. Aryutkin V. A. Kuryakin V. V. Travkin A. A. Yukhimchuk S. V. Fil'chagin 《Instruments and Experimental Techniques》2004,47(3):300-311
A computerized system for monitoring and controlling the gas-mixture preparation complex of the TRITON installation is described. The installation is designed for experimental investigations of muon-catalyzed fusion in triple mixtures of hydrogen isotopes H/D/T over wide ranges of temperature and pressure. The system is used to control the entire complex of gas-mixture preparation, the target parameters, and the gas-mixture composition, as well as to carry out radiation monitoring. Good performance characteristics, the high reliability of the system, and the possibility of its rapid adaptation to new tasks have been demonstrated in physics experiments. 相似文献
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A version of a modulation meter of quasistatic electric fields based on the use of synchronous detection is described. The device includes a logarithmic amplifier, which makes it possible to measure the electric field within a wide range without using variable attenuators. The sensitivity of the device is 1 V/m or better for a time constant of 1 s. Its small size and low power consumption make the device useful for measuring electric fields outside the laboratory. 相似文献
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D. A. Usanov Al. V. Skripal An. V. Skripal A. E. Postelga 《Instruments and Experimental Techniques》2004,47(5):689-693
A microwave autodyne vibration meter based on a Gunn oscillator is described. The device consists of a remote sensor with a horn and a digital display unit. The oscillator head is a waveguide section with a channel cross section of 7.2 × 3.4 mm2. The active element is a 3A728B diode placed in the gap of a rod holder. For the plane metal reflector under study, vibrations with a minimum amplitude of 400 m were recorded at a distance exceeding 20 m. The minimum detectable amplitudes of the object vibrations were 0.5 and 1.5 m at distances from the horn of the autodyne oscillator of 7 and 70 cm, respectively. 相似文献
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利用GPRS技术,通过加装无线抄表终端,设计实现了一个基于GPRS的无线抄表系统,详细阐述了该系统的软硬件设计。该系统成本低廉,性能稳定可靠。 相似文献
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A technique is developed for manufacturing methane gas sensors. The sensor is manufactured on the basis of a magnesium phthalocyanine (MgPc) organic semiconductor film 15 nm thick. The sensor sensitivity is 0.05 vol % at an operating temperature of 50°C. The sensor is easy to manufacture and it practically does not degrade. 相似文献
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本文介绍一种椭圆齿轮流量计的组成和设计,该定值仪是一种采用单片机作为控制核心,与输出电信号的流量计配套,进行流量定量控制的智能化仪表。 相似文献
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分析了目前影响自动抄表系统正常运行的因素,分析了有源表存在的问题,阐述了无源表的工作原理及优点,设计出了无源直读自动抄表系统方案. 相似文献
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介绍一种用于数字记录仪表的数据管理方法,它采用节-页-记录层次结构管理数据,比较好地满足存储和读取数据时实时性、时效性、断续性、动态性、可靠性等方面的要求.文章还给出了有关的程序流程图. 相似文献
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为结合阀控系统响应快和泵控系统能效高的优点,并减少传统四边联动阀带来的节流损失,提出一种泵阀并联进出口独立控制系统方案,应用于某6 t液压挖掘机动臂及斗杆系统。建立多学科联合仿真模型,设计泵阀协同驱动控制策略,研究了阀控单元与泵控单元输出功率比对系统特性的影响,并应用泵控单元消除了多执行器载荷差异带来的节流损失,对比分析传统进出口独立控制系统与所提系统的运行特性和能耗特性。仿真结果表明,增大阀控单元输出功率占比,可提高系统动态响应;增大泵控单元输出功率占比,可有效减少系统能耗。与传统进出口独立控制系统相比,该系统可减小节流损失90%,降低系统能耗41%,并改善重载执行器响应滞后现象。 相似文献
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本文针对油田生产测井中应用很广泛的流体电容含水率计在理论上和实验上进行了详细的研究。根据现有的实验事实,提出了高含水测量模。该模型认为,对于油水泡状流,即使在水矿化度很高时,流体电容仪仍在0-100%的含水率范围内有油水分辨能力。 相似文献