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本文论述了红外遥控仰卧起坐测试仪的原理,着重介绍了红外发射中用于器的结构和原理。通过干簧管、红外发射二极管的的以及电路上的独特设计,使得在较小体积的限制下,实现了发射瞬时功率大,静态微功耗,发射准确、限位发射等功能,从而使得本仪器使用价值大大提高。 相似文献
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背景
由于大自然中黑体辐射现象,任何物体都依据温度的不同对外进行电磁波辐射。波长为2.0~1000μm的部分称为热红外线。热红外成像利用热红外敏感CCD对物体进行成像,能反映出物体表面的温度场。红外热成像的物理学原理就是一个自然的生物红外辐射源,不断向周围发射和吸收红外辐射。 相似文献
由于大自然中黑体辐射现象,任何物体都依据温度的不同对外进行电磁波辐射。波长为2.0~1000μm的部分称为热红外线。热红外成像利用热红外敏感CCD对物体进行成像,能反映出物体表面的温度场。红外热成像的物理学原理就是一个自然的生物红外辐射源,不断向周围发射和吸收红外辐射。 相似文献
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《农业工程技术:农产品加工》2016,(1)
正背景由于大自然中黑体辐射现象,任何物体都依据温度的不同对外进行电磁波辐射。波长为2.0~1000μm的部分称为热红外线。热红外成像利用热红外敏感CCD对物体进行成像,能反映出物体表面的温度场。红外热成像的物理学原理就是一个自然的生物红外辐射源,不断向周围发射和吸收红外辐射。正常植株的温度分布具有一定的稳定性和特征性,叶片、茎杆各部位温度不同,形成了不同 相似文献
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为了增强管道的防腐能力,在单元管内喷涂了防腐涂层,为正确测定内涂层的厚度,研制了一种红外遥控自动检测装置,通过分析红外发射机、红外接收机等的工作原理,介绍了红外遥控系统及工作原理。 相似文献
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为减少化学农药的使用,降低种植成本,解决化学农药灭杀和农药残留所引起的二次污染,有效防治柑橘大实蝇(Bactrocera minax)虫害,采用单片机STC89C52为控制核心,运用红外检测和激光灭杀技术,基于特定的检测计数算法,研制了能自动检测和灭杀柑橘实蝇成虫的太阳能激光灭杀系统.同时,构建了样机对设计原理进行验证,验证结果表明,实蝇成虫数目实际值与系统检测值之间较接近,最小误差3.5%,最大误差8.6%,实蝇成虫进入时能及时开启激光器照射和灭杀. 相似文献
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G Scamarcio F Capasso C Sirtori J Faist AL Hutchinson DL Sivco AY Cho 《Science (New York, N.Y.)》1997,276(5313):773-776
A quantum-cascade long-wavelength infrared laser based on superlattice active regions has been demonstrated. In this source, electrons injected by tunneling emit photons corresponding to the energy gap (minigap) between two superlattice conduction bands (minibands). A distinctive design feature is the high oscillator strength of the optical transition. Pulsed operation at a wavelength of about 8 micrometers with peak powers ranging from approximately 0.80 watt at 80 kelvin to 0.2 watt at 200 kelvin has been demonstrated in a superlattice with 1-nanometer-thick AlInAs barriers and 4.3-nanometer-thick GaInAs quantum wells grown by molecular beam epitaxy. These results demonstrate the potential of strongly coupled superlattices as infrared laser materials for high-power sources in which the wavelength can be tailored by design. 相似文献
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A captive vea lion (Zalophus californianus) which had never before produced clicking sounds in the laboratory was first conditioned to vocalize in air and subsequently learned to emit underwater clicks. clicking was brought under control by differential reinforcement procedures. Vocalization as an indicator response may be useful in the comparative study of discriminative behavior. 相似文献
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Spectral measurements of red bioluminescence were obtained from the deep-sea stomiatoid fishes Aristostomias scintillans (Gilbert) and Malacosteus niger (Ayres). Red luminescence from suborbital light organs extends to the near infrared, with peak emission at approximately 705 nanometers in the far red. These fishes also have postorbital light organs that emit blue luminescence with maxima between 470 and 480 nanometers. The red bioluminescence may be due to an energy transfer system and wavelength-selective filtering. 相似文献
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提出了将近红外传感与AVR单片机控制技术相结合来测量土壤含水量的设计方法。该方法具有非接触式、功耗小、便携、速度快等特点。 相似文献
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Kasparian J Rodriguez M Méjean G Yu J Salmon E Wille H Bourayou R Frey S Andre YB Mysyrowicz A Sauerbrey R Wolf JP Wöste L 《Science (New York, N.Y.)》2003,301(5629):61-64
Most long-path remote spectroscopic studies of the atmosphere rely on ambient light or narrow-band lasers. High-power femtosecond laser pulses have been found to propagate in the atmosphere as dynamically self-guided filaments that emit in a continuum from the ultraviolet to the infrared. This white light exhibits a directional behavior with enhanced backward scattering and was detected from an altitude of more than 20 kilometers. This light source opens the way to white-light and nonlinear light detection and ranging applications for atmospheric trace-gas remote sensing or remote identification of aerosols. Air ionization inside the filaments also opens promising perspectives for laser-induced condensation and lightning control. The mobile femtosecond-terawatt laser system, Teramobile, has been constructed to study these applications. 相似文献
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原油储罐所用的老式液位计是使被测介质(原油)直接进入液位计内,由于原油易凝,常粘堵在液位计上,使液位计显示液位不准确,甚至无法工作,针对这种情况研究制出一种新型液位计-隔离液液位计,特点是把被测介质与进入液位计的显示介质彻底分开,显示介质选用粘底,不凝,不堵的液体,间接,准确,直观地将被测介液位显示出来。新型液一计与其它直显式液位计相比,增设了进液阀,加液漏斗,排液阀,进行气管和一个耐磨,耐腐蚀, 相似文献
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种子呼吸反映了种子的多种内在属性和生理生化特征,种子呼吸检测方法的进展对种子呼吸代谢研究具有重要意义。本文从种子呼吸检测方法及其应用2个方面进行了综述,重点综述了小篮子法、瓦氏微量法、Clark氧电极法、红外线二氧化碳分析仪法、氧传感技术检测法(Q2技术)和可调谐二极管激光吸收光谱(TDLAS)技术检测法等常用种子呼吸检测方法的工作原理、主要检测对象及操作方法,总结了以上种子呼吸检测方法的优缺点及其适用范围。讨论了种子呼吸检测方法在种子呼吸代谢、种子储藏和种子活力测定等几个方面的研究应用,重点阐述了种子呼吸检测技术与种子活力相关的研究进展。根据研究现状对种子呼吸相关检测方法及其研究和应用方向进行了展望:①基于TDLAS技术等光学检测技术有望研制出灵敏度更高、操作更为简单的种子呼吸检测方法及装备;②种子呼吸代谢及其影响因素研究有利于丰富和深入揭示种子呼吸代谢过程理论;③开展种子呼吸指标和种子活力参数研究,为探寻能够将种子呼吸强度作为有效判定种子活力指标提供重要参数支持。表1参60 相似文献