基本信息
| 标准名称： | 地面辐射供暖技术规程 |
| 英文名称： | Technical specification for floor radiant heating |
| 中标分类： |
工程建设 >>
供热、供气、空调及制冷工程 >>
供热、采暖工程 |
| ICS分类： |
建筑材料和建筑物 >>
建筑物中的设施 >>
中央供热系统
|
| 替代情况： | 被JGJ 142-2012代替并废止 |
| 发布部门： | 中华人民共和国建设部 |
| 发布日期： | 2004-08-15 |
| 实施日期： | 2004-10-01 |
| 首发日期： | |
| 作废日期： | 2013-06-01 |
| 起草单位： | 中国建筑科学研究院 |
| 起草人： | 徐伟、邹瑜、陆耀庆、曹越 |
| 出版社： | 中国建筑工业出版社 |
| 出版日期： | 2004-10-01 |
| 页数： | 64页 |
适用范围
为规范地面辐射供暖工程的设计、施工及验收，做到技术先进、经济合理、安全适用和保证工程质量，制定本规程。
本规程适用于新建的工业与民用建筑物，以热水为热媒或以发热电缆为加热元件的地面辐射供暖工程的设计、施工及验收。
前言
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目录
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引用标准
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所属分类： 工程建设 供热 供气 空调及制冷工程 供热 采暖工程 建筑材料和建筑物 建筑物中的设施 中央供热系统
Product Code:SAE J2382
Title:Video Based Light Measurement Techniques
Issuing Committee:Test Methods And Equipment Stds Committee
Scope:Traditional methods of photometry rely on the use of a goniometer to rotate the test item around two axes at right angles. This method is satisfactory for most situations but has certain disadvantages:a. Point-by-point measurements with a goniometer may be slow. With more advanced requirements, particularly for headlamps, where the entire beam pattern is of concern, isocandela measurements are becoming increasingly needed. Such testing can be very time consuming.b. For production quality assurance, the speed of a goniometer may not allow testing to keep pace with the production line if a large quantity of lamps must be sampled.c. High Intensity Discharge (HID) lamps are becoming commonly used. Such lamps are orientation sensitive, changing in both lumen output and intensity distribution when tilted. This can introduce significant inaccuracies in test results when testing is performed using a goniometer.There is a need for alternative test techniques which can achieve very high speed data acquisition, the capture of full isocandela distribution, and the elimination of lamp tilting. This SAE Informational Report describes fundamentals of video-based testing to address these concerns. Further information is required to provide all details needed to set up a laboratory using these techniques.With the video-based system, the lamp is fixed in position and aimed at a receiving screen. A camera, of particular type and grade, views the screen and is able to perform measurement of the reflected light (luminance) at each point on the screen. Proper calibration of the system can provide the luminous intensity distribution of the light under test from the measured luminance values.Numerous factors must be taken into account to produce an accurate measurement system. Under controlled conditions, it has been shown that the system can produce measurement of absolute intensity distributions with good accuracy. (Reference 2.1.1 and 2.1.2.)The great advantage of this form of photometry is its extremely high speed, allowing the collection of isocandela diagrams in less than one minute. There are some accompanying disadvantages which are discussed later.This document describes the basic techniques and the controls which are necessary for accuracy.Comments are also provided comparing video based technology to conventional goniometer methods.