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For trees to be "ECG",http://www.entradasalhambragranada.com
Trees is good to be a "electrocardiogram" to know Zhejiang Agriculture and Forestry large instrument developed by the national prize
 
Times correspondent reporter Zhang Jing Chen Shengwei
 
Times news people have a heart how to do? We can do an ECG testing, learn about the situation, so as to implement the treatment. If the trees or have become an important part of ancient buildings inside the timber, a long insects, cracks or other defects, there is no simple way to check it?
 
To solve this problem,hogan outlet milano, Zhejiang Agriculture and Forestry University, Xia Wang and other eight students at , Li Guanghui and other teacher's guide, after many years of successful development of wood stress wave tomography, can be like people to do the same electrocardiogram, without destroying the timber Learn premise wood interior condition.
 
Recently,http://total-depart2.seesaa.net, the "timber stress wave tomography" at the thirteenth "Challenge Cup" National Bank of Extracurricular Scientific Contest finals, won the "Challenge Cup" prize and the "cross Innovation Award" award.
 
Without felling trees to know good or bad
 
A growing tree, trunk,tiffany italia, there are no empty experienced master hand knocked hear sound,http://evenset490.seesaa.net, may be able to identify it. But still there will be impolitic situation. Woodland cut trees down to make materials like,http://www.sa.sakura.ne.jp/~dh/bbs3/lightbbs.cgi,air max outlet milano, you frequently encounter the tree cut down and useless empty, white cut.
 
Professor Li Guanghui responsible for the development of timber stress wave tomography instrument, said that the main use of pulse hammer hit instrument trees to internally generated stress wave propagation, in this period, with the pulse hammer conjoined timber stress wave tomography in automatically using the sensor output signal, after analog circuit processing output to digital processing circuitry and digital signal processing circuitry for processing the output of the preceding stage,http://www.10086n.com/forum.php?mod=viewthread&tid=752364, the stress wave propagation time of the waveform, and through the wood of the stress wave tomography display. The user can measure the stress wave propagation time and propagation velocity of change,louboutin pas cher soldes,http://www.worley.com, and calculate the elastic modulus and other parameters of the timber, through the relevant data of the same species than normal, to determine the presence or absence of internal defects in the wood.
 
"With our equipment, before cutting quiz to know." Information Engineering, Zhejiang Agriculture and Forestry University student Wang Lixia, said stress wave just nail some nails in trees support the sensor, it is possible to produce by percussion, insight Trees in the case. "Based on the speed sensor pass back, the computer can display an image. Pass back slower, red, yellow, the greater the likelihood is displayed on the computer, because the two colors are representative of the trees has a problem, a problem which the red The most serious, if the display will show green trees inside is good. "
 
Generation instrument has been used in the Forbidden City
 
"Our instruments can be used not only in the growth of the trees still body, but also can be used in the detection of ancient buildings in wood. Generation instrument couple of years ago,nike tn homme pas cher, in Beijing Forbidden City TESTED column,http://www.pokretzanasgrad-pale.org, helping management units identify problems in advance maintenance. "Speaking of his involved in the development of instruments, Lixia proudly.
 
This pride is not without reason. "Prior to this, although there are wood research of infrared detection, ultrasonic detection, magnetic resonance method, but because the equipment is expensive, complex and difficult to promote The biggest advantage we have developed is not the destruction of the original characteristics of the material, but in a short time consecutive test results In addition, our instruments there between the sensor and the test timber without any coupling agent; Effect easy to use, without timber size and shape; not cause harm to humans and other advantages compared to similar products at home and abroad at much lower cost. "
 
A new generation of timber stress wave tomography technology with international standards on top of already, and are based on two-dimensional imaging, can tell at a glance to see images inside the timber. However, the price is a fraction of foreign products. "Germany's instrument price more than 20 million,http://www.8264.com/home.php?mod=spacecp&ac=blog&blogid=, Hungary instrument price reached 300,000, our price was about 30,000, efficacy are similar." Now, the Provincial Forestry Department of Zhejiang Agriculture and Forestry University have been developed using wood stress wave tomography instrument.
 (Edit: SN010)