a strong correlation with ultrasonic velocity. ... Ultrasonic pulse velocity has been used as one of non-destructive test to analysis the internal defect ... From the result of the ultrasonic velocity test, the loss rate of area effected by termites damage had
ULTRASONIC INSTRUMENT CALIBRATION RECORD 수동 초음파검사 장비 보정 기록지 Plant/Unit Sheet No. Page Of Syst. ... Scanning Direction) Axial : dB Circ. : dB Axial : dB Circ. : dB REVIEWED BY LEVEL DATE QA 발주자 QA / QS 감독관 ULTRASONIC ... : Pulser Type : Velocity : Pulser Type : Voltage : Reject : Voltage : Reject : Damping : Freq. : Damping
In addition, sensitivity comparison with the linear ultrasonic pulse velocity method was performed. ... concrete according to the change of tensile force of prestressed beam, improved nonlinear resonant ultrasonic ... stress state in initial state because the method shows much higher sensitivity than existing linear ultrasonic
pulse velocity method equation were 0.56. ... According to standard design compressive strength of concrete is 40MPa, similar reliability of ultrasonic ... pulse velocity method equation had low similar reliability than other equation in case of standard design
The initial velocity was determined from the initial angular velocity, which would make the equivalent ... the canister, the visual testing and the non-detective testings such as Liquid Penetrant testing and Ultrasonic ... The tip-over analysis was executed using the velocity at each point as the initial conditions of the
각속도 센서 (angular velocity sensor) : 단위 시간당의 각변위를 측정하기 위한 센서이다. ... ABS와 VDC 및 파 레벨 센서 (ultrasonic level sensor) 12-2. 정전용량형 레벨 센서 (capacitive level sensor) 12-3. ... 조향 각속도 센서 (steering angular velocity sensor) : 전자 제어 서스펜션 센서의 하나로, 스티어링 휠 조작 속도를 검출하여 두 개의 포토 인터럽터와 슬릿
초음파 유량계(Ultrasonic flowmeter) 3. 실험방법 가. ... 초음파 유량계(DCT1088-2-3-2-30-A-A) 2) 적용 유체: 고형물질, 기포, 불순물 등이 없는 유체 3) 측정 범위: ±0 to 15m/s 4) 정밀도: ±0.5% of velocity
PWM(pin 3,5,6,9,10,11) Ultrasonic trigger ? Pin 6(output) Ultrasonic echo ? ... We used ultrasonic sensors to measure tow cases. ... It can be seen that the follow car velocity keeps a certain distance following the lead car velocity.
In this method, the ultrasonic velocity of fresh rock is assumed to be 5,000 m/s. ... The basic idea of the method is that the ultrasonic velocity decreases as a rock is being weathered. ... From the results, we found that the ultrasonicvelocities of the same rock type, granite samples range
-Ultrasonic investigation with an eye dummy 눈 모형에 대한 A스캔 이미지를 얻고 그 구조와 크기를 측정해본다. ... -Ultrasonic investigation with a heart dummy 심장 모형에 대한 M 스캔을 시행해보고, 얻어낸 이미지를 평가한다. II. ... (분석대상이 eye dummy로 바뀐 것뿐 나머지 방법은 위와 동일하다.) 3) 눈 모형 a scan 이미지를 얻는다. 4) average velocity formula를 이용해 눈
Fig.1 Experimental set-up ● Measurement of velocity of sound in liquid ① Experimental set-up Ultrasonic ... head를 수 mm 정도 담근다. 2) Laser를 켠 후, beam이 Ultrasonic head와 물통 바닥 사이를 지나서 스크린에 맺히도록 한다. 3) 초음파를 켠 후, 렌즈의 ... generator, He-Ne Laser, Lens(f:+20mm), Glass cell, Screen ② Procedure 1) 물통에 물을 2/3 정도 채운 후, Ultrasonic
Ultrasonic velocity decreased with creep cavity formation in PM alloy. ... On the other hand, no distinct changing trend of ultrasonic velocity was observed for IN738LC alloy. ... (velocity, attenuation) were measured to try to find relationships between them.
In order to evaluate the elastic modulus of the fluids, ultrasonic pulse velocities were measured with ... an ultrasonic test using transducers of 5MHz and 2.25MHz. ... The ultrasonic signals were only available with a transducer of 2.25 MHz at fluid concentrations of 5
Fig 11처럼 아무런 균열이 없는 상태에서도 Near Field 안에서는 음압변동이 나타나는 것으로 보아 Ultrasonic Testing에 있어 Near Field의 범위를 잘 ... Step Thinnest Step Middle Step Thickest Step Depth ( mm) 12 d39 TOF ( sec) 4.03E-06 7.08E-06 1.32E-05 Velocity
The qualities of ultrasonic waves This substance is judged the steel by velocity. ... by using constant velocity at inner part of material without breaking. ... From the test, we felt the ultrasonic testing method is very convenient way to measure the thickness,
pulse velocity method;ASTM 597), 반발경도법(Rebound hardness method;Schmidt, 1950) 등의 시도가 있었다. ... 줄일 수 있는 개선된 식을제시하는 것이다.1.2 연구동향콘크리트의 압축강도를 추정하기 위한 비파괴 시험으로 진행되었던 연구는 1900년대 중반부터 진행되어 왔으며, 초음파 속도법(Ultrasonic