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 Wysłany: Pi± 4:55, 10 Gru 2010 Temat postu: ugg boots billig Ultrasonic sensors in the hardnes |
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Ultrasonic sensors in the hardness of the coating of large diameter pipe should be in the hardness measurements
Parts of the site hardness testing, in the aerospace,ugg boots billig, aviation, machinery, metallurgy and other industries has been widely used. 2 hardness in the field of ultrasonic sensors in the automatic measurement system used in the ultrasonic sensor probe test applied to a certain force, the indentation on the pipe coating, using the principle of ultrasonic contact resistance, measuring the resonant frequency changes, which measure the hardness of chromium plating . System consists of ultrasonic sensors, automatic walking device, the sensor positioning device support, computer-controlled part of the other components. System block diagram shown in Figure 1. Figure 1 measurement process is: Pc machine through the computer interface to issue commands to the main control box (the bit machine), the main control box by automatically running gear instruction control action to drive support device to reach the desired location, the implementation of ultrasound measurement of the hardness sensor, measuring the end, the data acquisition and processing system for processing the measurement results into the computer can accept information, sent the crew displayed. German production of MIC20 use ultrasonic hardness of the inner diameter of 125mm, 8m long tube to the chrome layer hardness test, test results are as follows: First, the hardness of chromium produced a block, using the standard calibration of hardness value of 779HV1, then test the hardness of ultrasonic hardness blocks, measuring 5 to take, on average, showing the value of 775HV1. Its amendment, correction is 4HV1. Hardness of the pipe with ultrasound for 5 tests, the test results were 756,751,753,760,762 HVI; average 756HV1. The cross-sectional profile of the tube, causing the sample, with the desktop for 5 Vickers hardness tests, the test results were 764,761,762,755,750 HV1; average 758HV1. Hardness of the portable and desktop ultrasonic microhardness test results were compared between the two difference in the allowable error range. 3 Summary of ultrasonic hardness sensor structure is simple, made by ultrasonic hardness testing device is simple, high reliability,stivali ugg, wide application and can solve many irregular pieces, large pieces or desktop PC can not test the hardness of the sample problem for modern industrial production and national defense provides an advanced on-site hardness testing methods. ,+\held in Australia, LMF ){+++{ 2008 年 1O 21 to 24t3, the 15th Asia-Pacific legal j; Metrology Forum (APLMF) meeting in New South Wales, Australia; state successfully held in the Hunter Valley. Asia-Pacific region, including China, j; Taipei, Japan, the United States, Canada, Australia, Singapore,ugg stivali,; j 13 economies such as Malaysia, eight international and regional measurement group j; organization 0IML, APMP, PASC, WELMEC, ACCSQ ,; {PTB, PIF and other 54 representatives attended the meeting. t; Honorary Chairman of the meeting presided over by Dr. Harvey Australia; j this APLMF Conference. The meeting mainly for the 2007-2008 year j; professional work of the group were summarized, discussed the 2009 work; {for the program. Meanwhile, the Assembly also APLMF future development strategy, {; training applications and other issues were discussed. ; J taken from the \First j; into the digital measurement company's business units will be HexagonAB {j - Hexagon Measurement Technologies (HexagonMeasurementj; Technologies) of the subordinate enterprises. The company initially was measured; t Services (Surveyor'sServiceCompany) (also a j; home Hexagon subsidiary companies) as part of 17 years for the package; t, including aerospace, automotive, entertainment, medical, power generation in the multiple industries within the t; providing precision industrial measuring services,ugg milano, the history. {{The acquisition, Hexagon Measurement Group in the measurement hardware, {; software, accessories and customer service has been the formation of a complete package; t capacity, owns,tory burch shoes, including Brown & Sharpe, CogniTens, Le a} + ten ; ieaGeosystems, ROMER, Sheffield, PC-DMIS ,{:}{ DEA, Leitz, TESA, etc., several well-known brands. I = 『
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