Energy Harvesting Wireless Sensor Modules, Receiver & Transceiver Modules and Accessories in 868 MHz | EnOcean – Products
Archive for the ‘產業新聞’ Category
Energy Harvesting Wireless Sensor Modules, Receiver & Transceiver Modules and Accessories in 868 MHz | EnOcean – Products
Posted in 產業新聞, 工作's ... 滴咕 on 2013 年 09 月 19 日| Leave a Comment »
Energy Harvesting Wireless Technology for Home and Building Automation – EnOcean Alliance
Posted in 產業新聞, 工作's ... 滴咕 on 2013 年 09 月 19 日| Leave a Comment »
由Energy Harvesting Wireless Technology for Home and Building Automation – EnOcean Alliance.
About Us
The Wireless Standard for Green and Sustainable Buildings
The EnOcean Alliance develops and promotes self-powered wireless monitoring and control systems for sustainable buildings by formalizing the interoperable wireless standard.
- Profile
The wireless standard for sustainable buildings – No Wires. No Batteries. No Limits. - Board of Directors
Get to know Board of Directors of the EnOcean Alliance. - Our Members
Promoters, Paticipants and Associates of the EnOcean Alliance
EE Times – 10 Projects Showcasing the Raspberry Pi\’s Versatility
Posted in 產業新聞, 工作's ... 滴咕 on 2013 年 07 月 30 日| Leave a Comment »
由EE Times – 10 Projects Showcasing the Raspberry Pi\’s Versatility.
Slideshow
10 Projects Showcasing the Raspberry Pi’s Versatility
The Raspberry Pi is showing up in all kinds of places. Last time we brought you 15 accessories for the Raspberry Pi, and now we’re going to show you some of the cool projects these things are being used for. Keep reading for examples of the Raspberry Pi in the kitchen, at the bank, in your phone, feeding your dog, giving brains to R2D2, and more!
Click on through to the next page to begin!
Raspberry Pi LED display board
Jeroen Domburg, known online as “Sprite," was given a very interesting piece of hardware to bring back to life: a dual-color 224×48 LED display board that had previously been used to display information for some kind of transportation system. In a rare occurrence, he was also given all the necessary power supplies and the industrial computer to drive it.
Right in the middle of Jeroen’s project documentation you’ll get a glimpse into the art of computer hacking. The computer boots up, gives him the hardware specs, then goes to a blank screen. His task was to find out how to get access to this computer and gain full control over the network in a few minutes using publicly available tools.
Once he had the display working like it was originally intended, he had to take it a step further. This is where the Raspberry Pi comes in. With its power, network access, and gpio pins, it was a perfect fit to drive the display. Jeroen loaded a linux distrubution and video client on the board and got the results you see above. Note that the flickering is due to the refresh rate of the screen and the refresh rate of the camera overlapping — it doesn’t have this issue with the naked eye.
Audio player remote embedded in a retro phone
Kees Van Weert had a really cool idea to use one of those retro phones that many of us have lying around as an interface for his audio system. He’s got a Raspberry Pi in there interpreting his commands and serving out the proper results. You can see in the video above that he can control playback and volume as well as change stations, all from the keypad.
You can see how he constructed the whole thing on his personal site.
Raspberry Pi bitcoin miner
Everyone puts their Raspberry Pi to work controlling various things, but what about having it earn money for you? In this tutorial, Collin Cunningham shares how to use a Raspberry Pi to “mine" bitcoins. If you’re unfamiliar, bitcoin is an open-source digital currency that has been making quite a bit of a stir lately, and “mining" is one way you can earn currency. Not only will this setup mine bitcoins for you, it will show you a real-time breakdown of the rate you are earning, the real-world currency exchange rate, as well as other diagnostics that will be very helpfull.
The Atari emulator
The small form factor of the Raspberry Pi allows for some unique cases. In this instance, it is being housed inside an Atari game console cartridge. Considering that this Raspberry Pi is acting as an Atari emulator, the shell is quite appropriate. Aside from that unique shell, this project goes a step further to make an entire portable gaming system out of the Atari itself. At first glance, it appears like a normal Atari, but when you lift the hinged top of the case, an LCD is revealed allowing you to play the games from the classic machine right there.
Raspberry Pi for automated gardens
Another interesting use of the Raspberry Pi might be to actually help grow raspberries. In this case, it happens to be growing tomatoes, but the concept is the same. The Raspberry Pi is tracking temperature, moisture, and lighting for this grow box. It makes adjustments as needed, including watering the tomatoes and controlling the lights. Results and stats are tracked and displayed via Flickr and Twitter.
Raspberry Pi-Powered Ultimate Microwave
The typical application for the Raspberry Pi around the kitchen is usually tweeting status updates of some sort. But Nathan Broadbent has gone so far beyond that, we wonder why his brainchild isn’t a commercial product. He has integrated a Raspberry Pi into his microwave and incorporated a long list of additional features. Just check out what this Raspberry Pi-controlled microwave offers, including:
- A re-designed touchpad
- Nicer sounds
- Automatic clock updates from the Internet
- Voice-command controls
- Can use a barcode scanner to look up cooking instructions from an online database
- The microwave has a webpage so you can control it from your phone (why not?), and set up cooking instructions for products
- Tweets after it’s finished cooking something
Note the part above where the microwave can read a barcode and consult a webpage. There was no webpage with a database of cooking instructions, so Nathan built that too.
The voice-controlled coffee machine from Sascha Wolter on Vimeo.
Making coffee with a phone call
The team at The Developer Garden, together with help from people at Oracle, made this fun little project. It is a coffee machine that is controlled via a phone call. As you can see in the video above, it is functional at least as far as a prototype. You could, in theory, give it a call on your way to work and have a nice, fresh cup waiting upon your arrival. Adding cream and sugar will be in the next system upgrade.
Raspberry Pi is a dog’s best friend
Dog may be man’s best friend, but in this case, Raspberry Pi is easily a dog’s best friend forever. Judd’s owner took on this project as a learning exercise as well as a chance to do a project centered around his dog. He’s using a Raspberry Pi to check an email address. When there’s a new message, the machine dispenses a treat and snaps a picture. Judd takes care of the rest.
The code and plans are available on the project page if you would like to make a new best friend for your dog. The new exercise program for your dog that will be required if email traffic is heavy is not included.
Raspberry Pi arcade table
Pong never looked this good! The tiny footprint and decent power of the Raspberry Pi makes it perfect for emulating classic arcade machines. Here we can see a nicely constructed coffee table arcade which would look good in any lounge or dorm room. Not only can this table support a variety of arcade games, but also it can browse the web using a wireless mouse and keyboard.
All the materials for this were low-cost, reused, or recycled. Considering that, the final product looks really great.
R2D2 brought back to life
What should an industrious engineer get for a girlfriend’s (or boyfriend’s) birthday? A fully functional R2D2 of course!
A Raspberry Pi was the last hope for this broken R2 unit. Luckily, that Raspberry Pi did a fantastic job of taking over operations. The new and improved brain of this R2 brings voice control, facial recognition, WiFi control, motion sensors, and ultrasonic distance detection. You can see it in action in the video above, as commands are issued that R2 follows.
Certification and Testing – Zhaga Consortium
Posted in 產業新聞 on 2013 年 07 月 21 日| Leave a Comment »
由Certification and Testing – Zhaga Consortium.
Certification and Testing
Certification
Zhaga-certified products are listed in the online Certified Products database, and can be identified by the Zhaga logo. Only certified products are allowed to carry the Zhaga logo.
When you see the Zhaga logo on a product, in a product advertisement, or in a product catalogue, you know that this product is Zhaga-certified. Correct usage of the logo can be confirmed by reference to the Certified Products database.
Zhaga-certified products have all been tested by an independent test lab, listed below, which verifies that the product complies with one of the Zhaga specifications (or “Books").
Certification is managed by the Zhaga Logo License Administrator (Zhaga-LLA). The Zhaga-LLA issues product certificates, authorizes test labs, monitors compliance, and acts against inappropriate use of the Zhaga logo.
Authorized Test Labs
The Zhaga-LLA will only certify products that have been tested by an “Authorized Test Lab”.
Zhaga authorizes test labs by location and by specification. Test labs that operate testing facilities at different locations need a separate authorization for each location. Also, Zhaga has created a family of specifications – known as “Books" – and test labs need separate authorization for each Book.
Authorizing test labs by location and by specification makes it possible for the Zhaga-LLA to verify that the location is capable of testing compliance with a specification.
The Zhaga-LLA has authorized test labs at the following locations:
Book 2:
- DEKRA Certification B.V., Utrechtseweg 310, 6812 AR ARNHEM, The Netherlands
- VDE Testing and Certification Institute, Merianstrasse 28, 63069 Offenbach, Germany
- UL LLC. 7036 Snowdrift Road, Allentown, PA 18106
Book 3:
- DEKRA Certification B.V., Utrechtseweg 310, 6812 AR ARNHEM, The Netherlands
- VDE Testing and Certification Institute, Merianstrasse 28, 63069 Offenbach, Germany
- UL LLC. 7036 Snowdrift Road, Allentown, PA 18106
Book 4:
- DEKRA Certification B.V., Utrechtseweg 310, 6812 AR ARNHEM, The Netherlands
- UL LLC. Via XXV Aprile, 3/B, 20875 Burago di Molgora (MB) Italy
- VDE Testing and Certification Institute, Merianstrasse 28, 63069 Offenbach, Germany
Book 5:
No test lab authorized yet.
Book 6:
No test lab authorized yet.
Book 7:
- DEKRA Certification B.V., Utrechtseweg 310, 6812 AR ARNHEM, The Netherlands
- UL LLC. Via XXV Aprile, 3/B, 20875 Burago di Molgora (MB) Italy
- VDE Testing and Certification Institute, Merianstrasse 28, 63069 Offenbach, Germany
Book 8:
- DEKRA Certification B.V., Utrechtseweg 310, 6812 AR ARNHEM, The Netherlands
- UL LLC. 7036 Snowdrift Road, Allentown, PA 18106
- VDE Testing and Certification Institute, Merianstrasse 28, 63069 Offenbach, Germany
Testing Center Agreements
Authorized Test Labs are governed by the rules in the Zhaga Testing Center Agreement between the Zhaga-LLA and companies that operate one or more test labs. A reference copy of this agreement is available as a public download: 20111213 Interim Zhaga Test Center Agreement – reference copy.pdf
The Zhaga-LLA will sign this Testing Center Agreement with any company that meets the following criteria:
- the company is a member of Zhaga
- the company owns and/or controls one or more testing facilities that are accredited by an accreditor that is a full member of ILAC MRA.
The Zhaga-LLA has concluded Testing Center Agreements with the following companies:
- UL
- DEKRA
- IMQ
- Korea Institute of Lighting Technology
- VDE
- Bay Area Compliance Labs Corp. (Shenzhen)
- Shenzhen Academy. of Metrology and Quality Inspection
Test labs owned by companies that signed the Zhaga Testing Center Agreement do not automatically become an Authorized Test Lab. Each test lab must be authorized separately, in accordance with the procedure set out in article 3.1 and Annex C of the Zhaga Testing Center Agreement.
松翰 Sonix Technology Co., Ltd.
Posted in 產業新聞, 工作's ... 滴咕 on 2012 年 12 月 28 日| Leave a Comment »
SN93300
Wireless multimedia processor
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| Sonix SN93300 series is a 2.4GHz wireless multi-media processor that target on wireless transmission for video, audio and data applications. It supports at least 3 popular types of 2.4GHz RF transceiver, including Nordic® nRF24L01, AMICCOM® A7121, MuChip® MV400. Within bandwidth limit of 2Mbps, 3Mbps and 4Mbps data rate for each brand RF transceiver, SN93300 supports 1-way video, 2-way audio and 2-way data transmission. SN93300 implements most popular LCD panel interfaces and supports ISP CMOS sensor interface. For PC peripheral applications, it supports USB 1.1 interface and follow UVC/UAC driver-less class compliance of Microsoft® XP® SP2 or VISTA® OS.
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聯陽半導體 ITE Tech. Inc.
Posted in 產業新聞, 工作's ... 滴咕 on 2012 年 12 月 28 日| Leave a Comment »
| IT9500: ccHDtv Transmitter |
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| IT9500 is a series of highly integrated transmitter for ccHDtv camera, and other personal, community, or professional digital TV head-end applications. The core of IT9500 is a DVB-T COFDM modulator. The high level of integration of IT9500 significantly decreases the power consumption, board size and cost of modulators in digital TV transmitter. With IT9500, a low cost, low power, compact, reliable, high bandwidth and wireless (or wired) full HD delivery solution is easily achieved.
IT9500 offers very low total bill of materials (BOM) solutions. It includes processing units for forward error correction coding and digital modulation, D/A IQ converter, low-pass filters, and local oscillator for the external mixer. IT9500 series also supports flexible input interfaces, including embedded USB 2.0 interface, and serial/parallel TS interface input/output with built-in de-multiplexer.
IT9500 series is compliant to the non-hierarchical transmission specified in DVB-T (ETSI EN 300 744). A (204,188) Reed-Solomon encoder capable of correcting 8 error bytes is used to generate parity bytes for each input TS packet. The code rates of the punctured convolution encoder include 1/2, 2/3, 3/4, 5/6, and 7/8. Only native interleaving is used in IT9500. The output signal bandwidth is configurable from 2 MHz to 8 MHz. The supported signal constellations include QPSK, 16-QAM, and 64-QAM. FFT modes of 2k and 8k and guard intervals of 1/4, 1/8, 1/16, and 1/32 specified in EN 300 744 are supported. The transmission parameters are register-programmable, and are embedded in the Transmission Parameter Signaling (TPS) information as required by EN 300 744. A complete set of application programming interface (API) is available, facilitating fast and easy integration into products on Windows Mobile, Windows CE, Windows 8, Windows 7, Windows XP, Vista, Linux, and many other operating systems.Furthermore, a complete set of USB drivers for Windows 8/7/XP/Vista, Windows Mobile/CE, and Linux are providedfor IT9500. |
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http://www.ite.com.tw/TW/products_kind.aspx?CategoryID=2
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nModulator nETSI, DVB-T/H (EN 300 744 V1.5.1) Compliant baseband transmitter for Digital Terrestrial Television nConfigurable code rate: 1/2,2/3,3/4,5/6,7/8 nProgrammable QPSK, 16-QAM and 64-QAM Symbol Mapping nConfigurable support for 2k and 8k FFT nProgrammable Guard Interval (1/4, 1/8, 1/16, 1/32) nSupports variable channel band width from 2 MHz to 8 MHz nZero I/F complex base band I/Q output with integrated DAC and anti-aliasing filter nMER > 40dB nCarrier Suppression > 50dB nSpectrum Shoulders: 55 dB for perfect adjacent-channel operations |
ccHDtv – 解決方案 – DTV CAM
Posted in 產業新聞, 工作's ... 滴咕 on 2012 年 12 月 28 日| Leave a Comment »
Full HD DTV CAM
Features for DTV CAM
- Versatile Medium
- Air (wireless)
- Coaxial Cable
- Twisted Cable
- Parallel / Twin lead / Ladder Cable
- Deliver Full HD 1920x60p video and audio
- Long Distance, RG-6 up to 500M+, w/o repeater
- A single cable for
- Transmit 100+ Cam’s HD 1920X11080X60P Video / Audio
- AC / DC Power on cable (POC) design
- Full duplex PTZ command control
- Full duplex audio support
- CVBS video for backward compatible DVR
- Low cost transceivers
- Well approved and mature transmission protocol
- Cost-effective peripheral components, test equipment, debug tools
- Ultra Low Transmission Latency, 2ms
台灣安全監控新的傳輸規格ccHDtv (HDCCTV 和 ccHDtv 傻傻分不清楚!! )
Posted in 產業新聞, 工作's ... 滴咕 on 2012 年 12 月 28 日| Leave a Comment »
台灣安全監控新的傳輸規格ccHDtv (HDCCTV 和 ccHDtv 傻傻分不清楚!! ).
ccHDtv 就是將 數位電視DVB-T 的技術 用到安全監控這裡….
DVB-T 他是有一個規範所約束的。縱使一條同軸電纜 他的可以時傳送多台頻道,但每一個頻道有一個頻寬的極大值。目前極大值是 32M bit/sec
也就是說,有這個上限,所以在傳輸高解析度的影像時候，前端攝影機一定要壓縮…
不可以直接傳送raw data..
一般的電視都有附送數位電視機上盒,就可以直接收看影像,
但如果要同時看若干路的影像, 那麼就要去裝若干路的 Tuner….
比如說好了,如果我有看一路的影像,我就直接用電視的數位電視接收盒就可以看到,
但如果我要同時看四路，就要有四組數位電視接收盒,
因此,ccHDtv 的整個Roadmap 也會有類似 4ch video decoder 一樣, 會出一顆 4ch 的Tuner
和HDCCTV 一樣, 他也是要有 TX 和RX , 一樣是走同軸電纜, 同軸電纜用兩光的就可以了
具體數據如下:
3C2V: 500公尺(M) RG59: 500公尺(M) RG6: 900公尺(M)
CAT5/CAT6: 275公尺(M)
再來談談時間延遲( Time latency),
HDCCTV 和 cctv 都是real time.
ccHDTV 和ip camera 都會有latency.
只是 ccHDTV 的latency 是可以預測的, 一旦選定某種傳輸格式,
Latency 是固定的, 不會隨機變動
IP CAMERA 傳輸延遲, 在網路上是無法預估的, 點對點可能只有幾 ms, 但在較大網路就可能到 數百ms, 或 second 等級 而且是不可以預測的，隨機變動的
以下簡單的比較一下各種傳輸方式
廣東LED（深圳）產業技術創新聯盟正式揭牌 | LEDinside – LED, LED照明, LED交易, LED研究報告, LED市場, 所有LED專業資訊都在LED產業網
Posted in 產業新聞 on 2012 年 09 月 13 日| Leave a Comment »
由廣東LED（深圳）產業技術創新聯盟正式揭牌 | LEDinside – LED, LED照明, LED交易, LED研究報告, LED市場, 所有LED專業資訊都在LED產業網.
2012-09-13 09:49 [編輯：jamiehou]
廣東LED（深圳）產業技術創新聯盟日前正式揭牌，這意味著原LED產學研聯盟現升級為省級聯盟。深圳大學、清華大學深圳研究生院、中國科學院深圳先進技術研究院、清華大學研究院、雷曼光電、九洲光電、瑞豐光電等七家單位為廣東LED（深圳）產業技術創新聯盟新任常務理事。
據介紹，原LED產學研聯盟建立了“LED公共技術研發服務平台”，組織了LED路燈公測等相關活動，對深圳該產業有較大促進。近日該聯盟被升級為省級聯盟，新升級的廣東LED（深圳）產業技術創新聯盟，將更好地謀划產業布局，為聯盟企業服務，企業通過聯盟“抱團”，將更好的打造公共服務平台，提高企業的創新力。
據了解，現在深圳LED照明行業相關企業1500余家。目前基本形成了“襯底材料－外延片－晶元－封裝－應用”相對完整的產業鏈，並成為全球LED背光源和LED顯示屏的主要生產基地。
真明麗散熱塑料在LED筒燈/球泡的應用 | LEDinside – LED, LED照明, LED交易, LED研究報告, LED市場, 所有LED專業資訊都在LED產業網
Posted in 產業新聞 on 2012 年 09 月 13 日| Leave a Comment »
由真明麗散熱塑料在LED筒燈/球泡的應用 | LEDinside – LED, LED照明, LED交易, LED研究報告, LED市場, 所有LED專業資訊都在LED產業網.
2012-08-24 13:54 [編輯：jasminezhuang]
一：概述
傳統導熱材料多為金屬和金屬氧化物，以及其他非金屬材料，如石墨、炭黑、A1N、SiC等。隨著科學技術和生產的發展，許多產品對導熱材料提出了更高要求，希望其具有更加優良的綜合性能，質輕、耐化學腐蝕性強、電絕緣性優異、耐衝擊、加工成型簡便等。導熱絕緣聚合物複合材料因其優異的綜合性能越來越多得到廣泛應用。
但是由於高分子材料多為熱的不良導體，限制了它在導熱方面的應用，因而開發具有良好導熱性能的新型高分子材料，成為現在導熱材料的重要發展方向。特別是近年來，隨著大功率電子、電氣產品的快速發展，必然會出現越來越多的由於產品發熱，導致產品功效降低，使用壽命縮短等問題。有資料表明，電子元器件溫度每升高2℃，其可靠性下降10％；50℃時的壽命只有25 ℃時的1／6 。
導熱填料主要分為兩種：一種是導熱絕緣填料，如金屬氧化物填料、金屬氮化物填料等。另一種是導熱非絕緣填料，如炭基填料和各種金屬填料等。前者主要用於電子元器件封裝材料等對電絕緣性能有較高要求的場合，後者則主要用於化工設備的換熱器等對電絕緣性能要求較低的場合。填料的類型、粒徑大小及分佈、填充量和填料與基體間的界面性能對複合材料的熱導率都有影響。
導熱塑料使用的基體聚合物主要有：PA(尼龍)，FEP（全氟聚丙烯），PPS,PP,PI 環氧樹脂,POM,PS 及PS與PE複合材料等。
聚合物基導熱複合材料的國內外研究現狀：聚合物基導熱複合材料是通過添加導熱填料來提高高分子材料的導熱性能。一般是以高分子聚合物(如聚烯烴、環氧樹脂、聚酰亞胺、聚四氟乙烯等)為基體，較好導熱性能的金屬氧化物如A1203、MgO，導熱及絕緣性能良好的金屬氮化物AIN、BN，以及高熱導率的金屬材料如Cu、AI等為導熱填料，進行二相或多相體系的複合。目前歐洲和日本及美國都有公司報道有成熟產品在推廣使用。例如：荷蘭皇家帝斯曼集團工程塑料推出了21世紀以來的第一種新型聚合物：Stanyl®TC系列導熱塑料可用於LED; 成為向LED照明應用的塑料散熱管理解決方案的全球領先供應商。美國先進陶瓷公司和EPIC公司開發出熱導率達20.35W／(m•K)的BN／聚丁烯(PB)複合工程塑料，可用普通工藝如模壓成型製備而得，主要可用於電子封裝、集成電路板、電子控制元件、電腦殼體等。
國內利用模壓法製備了氮化鋁環氧樹脂(EP)導熱複合材料，AIN含量、粒徑、硅烷偶聯劑及加工工藝對體系導熱性能的影響。研究表明，隨著A1N含量、粒徑的增加，體系的導熱性能不斷提高；偶聯劑的加入增強了AIN和環氧樹脂的界面粘結性能，減小了界面間的熱阻，從而有利於體系導熱性能的提高。當AIN粒徑為5．3微米含量為67v01％時，AIN／EP導熱複合材料的熱導率為14W／(m•K)。
二：導熱機理
導熱高分子材料的導熱性能最終由高分子基體、導熱填料以及它們之間的相互作用來共同決定。高分子基體中基本上沒有熱傳遞所需要的均一緻密的有序晶體結構或載荷子，導熱性能相對較差。作為導熱填料來講，其無論以粒狀、片狀、還是纖維狀存在，導熱性能都比高分子基體本身要高。當導熱填料的填充量很小時，導熱填料之間不能形成真正的接觸和相互作用，這對高分子材料導熱性能的提高几乎沒有意義；只有當高分子基體中，導熱填料的填充量達到某一臨界值時，導熱填料之間才有真正意義上的相互作用，體系中才能形成類似網狀或鏈狀的形態一即導熱網鏈。當導熱網鏈的取向與熱流方向一致時，導熱性能提高很快；體系中在熱流方向上未形成導熱網鏈時，會造成熱流方向上熱阻很大，導熱性能很差。因此，如何在體系內最大程度地在熱流方向上形成導熱網鏈成為提高導熱高分子材料導熱性能的關鍵所在。
導熱理論模型：目前，導熱膠黏劑的研究主要集中在填充型導熱膠黏劑的研究上，結構型導熱膠黏劑的研究還鮮有報道。許多研究者曾提出各種模型對填充導熱材料的熱導率進行預測，但理論模型所討論的填充量一般集中在低填充或中等填充(體積分數10％ ～30％)上，而很少提及在高填充及超高填充下的理論值與實驗結果的相符合的情況。Agari Y 』提出了適用於高填充及超高填充量的理論模型。該理論模型認為：在填充聚合物體系中，若所有填充粒子聚集形成的傳導塊與聚合物傳導塊在熱流方向上是平行的，則複合材料導熱率最高；若與熱流方向相垂直，則複合材料的導熱率為最低。該理論模型充分考慮了粒子對複合材料熱性能的影響，並假定粒子的分散狀態是均勻的，從而得到了理論等式。其表達式為：
A=VfC21g),2+ (1一 )lg(c1A1)
式中，A為複合材料的導熱係數，A 和A 分別為聚合物和填料的導熱係數， 為填料的體積分數，c 為影響結晶度和聚合物結晶尺寸的因子，C 為形成粒子導熱鏈的自由因子。c越接近1，粒子就越容易形成導熱鏈，其對複合材料導熱性能影響也越大。其在後來的研究中發現：在低填充至超高填充範圍內Maxwell-Eucken，Bruggeman，Cheng-Vochen以及Nielsen的理論模型與其它的理論模型相比較，其理論曲線與實驗數據基本相符，其它幾種理論模型與實驗數據都有一定的偏差。
三：本文研究的目的
目前國內外功率型LED行業燈具普遍使用鑄鋁作為外殼散熱材料，使用散熱塑料外殼可節約大量能源和提高生產效率，對於降低LED產品成本具有極為現實的經濟意義。使用塑料后還能極大地拓展燈具工程師開發產品的靈和性和創造性，設計更加輕便、美觀的產品以便更快的向大眾消費者推廣。我們基於廣泛研究的基礎上提出使用散熱塑料通過模具生產8瓦、10瓦LED筒燈底座，檢查產品各個部位的溫度是否合符要求來檢驗散熱塑料是否合格，以便大批量生產。
四：結果測試
本文使用自行研製的散熱材料製作8瓦、10瓦LED筒燈底座取代原先使用的鑄鋁底座製作成8瓦、10瓦LED筒燈低座，按照標準IEC60598 12.4使用多路溫升測試儀測試燈杯各點溫度。
圖片：
測試結果：
1：8瓦LED筒燈溫度測試：
測試記錄
1、測試條件及要求：樣品通電（220V/50Hz）待溫度穩定後記錄各點最高的溫度，要求不超過溫度限值
2、標準條款：IEC60598 12.4
3、測試儀器：多路溫升測試儀
最高溫差3.4度
2：10瓦LED筒燈溫度測試：
最高溫差5.1度
四：結果分析
從兩種不同瓦數的筒燈測試結果看，我們用自製的散熱材料生產的筒燈與用鑄鋁外殼的生產的筒燈在各個測試點的溫度相差不大，最高溫差不超過6度，全部測試點的溫度都低於極限溫度，都能使用。從而達到了用散熱塑料代替鑄鋁來生產LED筒燈的目的。
文章來源：真明麗集團封裝研發中心 劉英傑、李榮、許永現
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