Electronic instrument for locating and diagnosing automotive chassis sounds

  • US 5,435,185 A
  • Filed: 08/16/1993
  • Issued: 07/25/1995
  • Est. Priority Date: 08/16/1993
  • Status: Expired due to Fees
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First Claim
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1. A vibration and acoustic sound diagnostic instrument for use by an automotive maintenance mechanic for discriminating audible vibration sounds generated by automotive devices having mechanical faults, said instrument comprising:

  • a) at least one acoustic vibration pick-up device mounted in contact with an automotive device for detecting and converting audible vibratory acoustic sounds generated by said automotive device into electromagnetic signals;

    b) an electronics housing conformed to be held in the hand of said maintenance mechanic;

    c) pre-amplifier circuitry within said housing electrically coupled to said acoustic vibration pick-up device for receiving said electromagnetic signals from said pick-up device;

    d) range selector circuitry within said housing electrically interconnected to said pre-amplifier circuitry for selecting sound ranges respecting said electromagnetic signals;

    e) a decibel meter mounted to the exterior of said housing and electrically interconnected to said pre-amplifier circuitry for visually indicating changes and peaks in the audible vibratory acoustic sounds detected by said acoustic vibration pick-up device mounted to said automotive device;

    f) operational audio amplifier circuitry within said housing electrically interconnected to said pre-amplifier circuitry for converting said electromagnetic signals into secondary acoustic signals;

    g) a battery power supply electrically interconnected to said range selector circuitry and said pre-amplifier circuitry for energizing said instrument; and

    h) an earphone headset electrically interconnected to said audio amplifier circuitry for use by said maintenance mechanic wherein said secondary acoustic signals are available to said mechanic for audible discrimination of mechanical faults of said automotive device.

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