AN INFRARED STROBE CCD TELEVISION CAMERA UNIT

红外频闪CCD电视摄像机装置

• 批准号: 3874209
• 负责人: H E CASCIO
• 金额: --
• 依托单位: NATIONAL CENTER FOR RESEARCH RESOURCES
• 依托单位国家: 美国
• 资助国家: 美国
• 起止时间: 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/3874209
• 关键词: biomechanics; biomedical equipment development; biomedical equipment resource; chordate locomotion; image processing; infrared radiation; television; video recording system

The Biomechanics Laboratory makes available to clinicians and researchers at the NIH valuable quantitative information concerning human motion and the functional mechanisms which produce human motion. The Laboratory has a computer-operated television motion analysis system (VICON) to acquire and evaluate data associated with patient function. The video system detects the presence of reflective markers located on the patient and calculates the three-dimensional location of each marker by means of computer software. The problems associated with persistence, blooming, and electronic stability of the vidicon cameras make the balancing and calibration of the six cameras very difficult. Also, problems with video overload are encountered when a strobed infrared (IR) Light Emitting Diode (LED) array is viewed by another camera. This condition prevents the user from obtaining reliable data. The solution is to replace the vidicon cameras with CCD cameras, which have superior electronic stability and do not display picture smearing when detecting fast motion. Each camera has a strobed IR array to illuminate the field of view. To eliminate the illumination cross-talk between cameras, each IR array is equipped with IR emitters with wavelengths of either 880nm or 950nm. An IR band-pass filter that matches the wavelength of the array is placed over the camera lens. Six dual wavelength IR strobed camera units will be fabricated, using CCD cameras and the required video and strobe circuitry.

生物力学实验室为临床医生和研究人员提供 在美国国立卫生研究院，有价值的关于人体运动和 产生人体运动的功能机制。实验室有一个 计算机操作的电视运动分析系统(VICON)，以获取和 评估与患者功能相关的数据。视频系统检测到 位于患者身上的反射标记的存在并计算 利用计算机实现每个标记物的三维定位 软件。与持久力、开花和 摄像机的电子稳定性使平衡和 这六台摄像机的校准非常困难。此外，视频也存在问题 当选通红外(IR)发光二极管时遇到过载 另一台摄像机可以查看(LED)阵列。这种情况会阻止用户 无法获得可靠的数据。解决办法就是更换摄像机。 配备ccd摄像头的摄像头，具有卓越的电子稳定性，并且 在检测到快速运动时不显示图片涂抹。每个摄像头都有一个 频闪红外阵列，照亮视场。要消除 摄像机之间的照明串扰，每个红外阵列都配备了红外 波长为880 nm或950 nm的发射器。一种红外带通滤光片 将与阵列波长相匹配的波长放置在相机镜头上。 将使用CCD制造六个双波长红外频闪相机单元 摄像机以及所需的视频和闪光电路。