Resources Contact Us Home
Method and apparatus for detection of edge position thickness or splice position of a material web

Image Number 5 for United States Patent #5583828.

A series of pulses of ultrasonic wave emitted from the transmitter with a specified period are received by the receiver. The received signals are rectified to a smooth wave with a single peak. The occurrence time of the peak is determined to gain and store the peak value, which corresponds to the edge position, thickness or splice position of the web. Alternatively, the transmitter emits a series of pulses of ultrasonic wave with a specified period and the peak value in the signals received by the receiver is once held in the peak-holding circuit. The peak voltage held is discharged and reduced with the discharge device and smoothing of the charged voltage yields its mean value, which corresponds to the edge position, thickness or splice position of the web.

  Recently Added Patents
Optical fixing device and image forming apparatus
Vehicle having power supply apparatus
Sub-resolution assist feature repair
Information storage medium, reproducing method, and recording method
Method, system, and computer program product for scoring theoretical peptides
  Randomly Featured Patents
Method for controlling an automatic transmission for a motor vehicle
Flux for fire prevention in magnesium
Method of sulfuration treatment for a strained InAlAs/InGaAs metamorphic high electron mobility transistor
Carbon nanotube arrays and manufacturing methods thereof
Object sensing system
Portable patient support device and method of preparing patient for prostate brachytherapy
Composition comprising a derivative of hermatoxylin, of hematein, of brazilin or of brazilein, metal salt, hydrogen peroxide, and (bi)carbonate and hair dyeing method therewith
Integrated circuit packaging system with stacked lead and method of manufacture thereof
Methods and systems for dynamic measurement of a system's ability to support data collection by network management system applications
Toner bottle cap for copying machine