Seismic coherence in the presence  of signal time-delay fluctuations

Obtaining precise and reliable test results requires specific tools on one hand, and at the same time, reliability of the results should not be questioned. One of the necessary steps to achieve this goal is the calibration of the measuring device before the test. This article describes an experiment involving calibration of the device by an independent method called cutting beam calibration carried out on the ultrasonic material tester UMT 01. The standard calibration of this device is carried out by using a dedicated metal disc as a template. Calibration of the tester consisted of determining the time delay of the measured signal. The obtained results were used to prepare charts and to determine of signal time delay, called correction, which also allowed determining the velocity of ultrasonic wave in the tested material in three ways. The experiment was conducted on samples of three species of wood: Norway spruce, Scots pine and sycamore. The velocity of ultrasonic wave from research was compared with literature data.

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Adaptive Wide-Area Damping Control Scheme for Smart Grids with Consideration of Signal Time Delay

Energies ◽

10.3390/en6094841 ◽

2013 ◽

Vol 6 (9) ◽

pp. 4841-4858 ◽

Cited By ~ 12

Author(s):

Guowei Cai ◽

Deyou Yang ◽

Cheng Liu

Keyword(s):

Time Delay ◽

Smart Grids ◽

Wide Area ◽

Damping Control ◽

Control Scheme ◽

Signal Time

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An Extension of DTFT-Based Sinusoidal Signal Time Delay Estimation Algorithm for Linear Time-Varying Situation

2013 IEEE International Conference on Green Computing and Communications and IEEE Internet of Things and IEEE Cyber, Physical and Social Computing ◽

10.1109/greencom-ithings-cpscom.2013.106 ◽

2013 ◽

Cited By ~ 2

Author(s):

Yi Huang ◽

Aiqun Hu ◽

Wei Liu ◽

Tao Li ◽

Shengdong Xie

Keyword(s):

Time Delay ◽

Linear Time ◽

Estimation Algorithm ◽

Time Delay Estimation ◽

Sinusoidal Signal ◽

Delay Estimation ◽

Time Varying ◽

Signal Time

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Coated Tactile Sensor Using Signal Time Delay Phenomenon

Impact ◽

10.21820/23987073.2019.10.79 ◽

2019 ◽

Vol 2019 (10) ◽

pp. 79-81

Author(s):

Takayuki Takahashi

Keyword(s):

Time Delay ◽

Three Dimensional ◽

Tactile Sensor ◽

Systems Science ◽

Physical Interaction ◽

Tactile Sensors ◽

Different Types ◽

Delay Phenomenon ◽

Signal Time

Tactile sensors measure information arising from the sensor's physical interaction with its environment. There are different types, including force/torque, dynamic and thermal. Many devices require sensors to detect contact with the outside world, much like robots. Dr Takayuki Takahashi is a researcher based in the Department of Symbiotic Systems Science, Fukushima University, Japan. He and his team have developed a tactile sensor that can be sprayed over three-dimensional shapes, called the Spray Coated Tactile Sensor (ScoTacS).

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