DEVICE FOR EVALUATING THE VIBRATIONS OF A REVOLVING MEMBER

• US 3,745,815 A
• Filed: 10/05/1971
• Issued: 07/17/1973
• Est. Priority Date: 10/17/1970
• Status: Expired due to Term

• Current Assignee: Pier Felice Bentone, Pier Giorgio Golzio, Vincenzo Vrola
• Original Assignee: Pier Felice Bentone, Pier Giorgio Golzio, Vincenzo Vrola
• Inventors: Bentone, Pier Felice, Golzio, Pier Giorgio, Vrola, Vincenzo
• Primary Examiner(s): Gill, James J.
• Application Number:
  US05/186,287
• Time in Patent Office: 651 Days
• Field of Search: 73/71.4,71.2,67,67.2,69
• US Class Current: 73/593
• CPC Class Codes: G01H 1/003 of rotating machines G01H1/10 takes precedence
• CPC Class Codes: G01M 13/045 Acoustic or vibration analysis

Abstract

A device for evaluating the vibrations of a revolving member comprises a detecting head for detecting the vibrations and their amplitude, an integrating circuit actuated by a monostable multivibrator that generates a pulse in correspondence with each detected vibrations, and an amplitude discriminating circuit whose threshold value is such as to emit a signal only when a signal received thereby from the integrating circuit has an amplitude corresponding to the sum of a plurality of those pulses.

Claims

1. A device for evaluating the vibrations of a revolving member, comprising detecting means detecting the vibrations of said revolving member, means generating electrical pulses of different amplitude that varies with the magnitude of the vibrations, means for receiving said pulses of different amplitude and for emitting pulses of equal amplitude whenever pulses of amplitude greater than a predetermined minimum amplitude are received, and means for receiving said pulses of equal amplitude and for generating a signal when the number of said pulses of equal amplitude exceeds a predetermined number per unit time.

2. A device for evaluating the vibrations of a revolving member, comprising detecting means detecting the vibrations of said revolving member and emitting signals that vary as said vibrations, an amplifying circuit and at least one filter to eliminate the components of said signals which are not produced by vibrations of the revolving member, a first amplitude discriminating circuit receiving signals from said amplifying circuit and filter, said amplitude discriminating circuit having a threshold level that permits the exit therefrom solely of signals corresponding to vibrations of at least a predetermined minimum amplitude, a monostable multi-vibrator that receives the last-named signals and which generates a pulse in correspondence with each said received signal, an integrating circuit actuated by said monostable multi-vibrator, and a second amplitude discriminating circuit having a threshold value such as to emit a signal only when the signals delivered thereto by the integrating circuit exceed a predetermined number per unit time.

3. A device as claimed in claim 2, and a relay control circuit adapted to be energized by signals from said second amplitude discriminating circuit.

4. A device as claimed in claim 2, and means for feeding the signal at the output of said second amplitude discriminating circuit to an indicating device.