design of digital atmospheric pressure altimeter based on microcontroller chip avr

1、

the mechanical pressure altimeter measures atmospheric pressure relative to sea level through a series of bellows, gears, and springs, which move pointers on a dial.

气压式高度表测量气压是参照海平面的，透过一连串的真空膜盒、齿轮和弹簧来移动刻度盘上的指针。

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2、

in this paper the extreme values of altitude error are estimated through an analysis of the effects of the meteorological factors on the pressure altimeter.

通过分析气象因素对气压式高度表测量高度的影响，求出了高度误差极值。

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3、

we have studied the relationship between gamma specific activities of natural radionuclides and alpha and beta ray level in building materials used in interior decoration, and the saturated thickness of beta ray from the surface of different materials.

进行了各类建材表面a、b辐射水平和其天然放射性核素g比活度关系的研究和不同饰材表面b辐射水平的饱和厚度研究。

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4、

each emission of an alpha or beta ray accompanies the transmutation of an atom; the energy communicated to these rays comes from inside the atom.

每一次a射线或b射线的放射都伴随着原子的蜕变，因为赋予这些射线的能量来自于原子的内部。

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5、

aluminum alloy was firstly anodized, then the ptfe was introduced into the porous hard anodizing film by means of hot dipping or electrolysis, finally the synergistic coating was formed by nice vacuum heat treatment.

将铝及铝合金先进行硬质阳极氧化，然后采用热浸或二次电解的方法将氟聚合物微粒引入阳极氧化膜微孔及其表面，通过真空精密热处理的方法形成协合涂层。

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6、

according to the enterprise's request for the property of the hard anodizing film on the top surface of piston, a set of equipment for hard anodizing at high pulse current was auto-designed by the laboratory.

根据企业对活塞顶面硬质阳极氧化膜膜层性能的要求，实验室自行设计了一套在大脉冲电流下进行硬质阳极氧化处理的装置。

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7、

a composite hard-anodized coating containing micro ptfe ( polytetrafluoroethylene) particles on aluminium alloy 6063 was produced by adding micro ptfe particles into the traditional hard anodizing solution.

在常规铝合金硬质阳极氧化液中添加聚四氟乙烯颗粒，在6063铝合金表面形成含有聚四氟乙烯颗粒的复合硬质阳极氧化层。

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8、

requirements for cooling and energy consumption in the low-voltage hard anodizing for aluminium using pulse current with simple sine wave were discussed.

本文对采用简单正弦波脉冲电流的低压硬质氧化工艺过程中冷却要求进行了讨论，这种低压脉冲电流是由一个60赫兹正弦波交流电压叠加一个数值上等于交流电压振幅的直流电压而形成的。

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9、

hard anodizing is a kind of technique in surface treatment of aluminum and its alloy in present industrial, which is in common use and effective.

硬质阳极氧化是当前工业中一种常用而又有效的铝及其合金材料表面处理技术。

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10、

hard anodizing film could be obtained on al-cu alloy surface which had been treated with solid solution treatment and natural aging.

经固溶处理和自然时效的铝铜合金可以进行硬质阳极氧化。

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11、

through many tests, it is proved to that its performance is better than the present hard anodizing power supplies.

试验电源整机3.5kW，通过大量实验，证明其性能优于以往的硬质阳极氧化电源。

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12、

hard anodizing technique for al-si alloy piston crown

高硅铝合金活塞顶部硬质阳极氧化

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13、

study on preparation of the composited film of hard anodizing with aluminum alloys and ptfe

铝合金硬质阳极氧化与聚四氟乙烯复合膜层制备研究

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14、

the hard anodizing of aluminium piston on diesel engine

柴油机铝活塞的硬质阳极氧化

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15、

research on hard anodizing power supply of alternative process and full digitalization based on embedded microprocessor

基于嵌入式的多工艺全数字硬质阳极化电源的研究

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16、

hard anodizing power supply is an important part of the equipment to deal with metal surface.

硬质阳极化电源是对金属表面进行处理的装置。

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17、

hard anodizing of aluminium alloys with various electric wave forms

不同电源波形的铝合金硬质阳极氧化

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18、

a study on the hard anodizing of aluminium alloy with pulsed current

铝合金脉冲硬质阳极氧化的研究

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19、

hard anodizing process for aluminium with high tolerance to working temperature

宽温度铝硬质阳极氧化工艺的研究

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20、

application of fsq direct-reading spectrograph in analysis of the founding furnace

FSQ直读光谱仪在铸造炉前分析中的应用

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