Apparatus for monitoring operator vibration for earth moving machinery with operation cab

• US 7,236,868 B2
• Filed: 07/06/2006
• Issued: 06/26/2007
• Est. Priority Date: 08/11/2005
• Status: Expired due to Fees

• Current Assignee: Volvo Construction Equipment Holding Sweden AB
• Original Assignee: Volvo Construction Equipment Holding Sweden AB
• Inventors: Kang, Jong Min
• Primary Examiner(s): Camby; Richard M.
• Application Number:
  US11/481,620
• Publication Number:
  US 20070038354A1
• Time in Patent Office: 355 Days
• Field of Search: 701/1, 701 36- 50, 73 137- 14, 180 8912- 8914
• US Class Current: 701/50
• CPC Class Codes: G01H 1/00 Measuring characteristics of vibrations in solids by using direct conduction to the detector G01H9/00, G01H11/00 take precedence

Abstract

An apparatus for monitoring an operator vibration for an earth moving machinery with an operation cab is disclosed. In an earth moving machinery having an operation seat in an interior of an operation cab installed at an upper frame of a lower running body, there is provided an apparatus for monitoring an operator vibration for an earth moving machinery with an operation cab which comprises an operation seat which is installed in an interior of the operation cab and which includes an acceleration sensor for sensing and converting vibration into a 3-axis channel signal; a vibration measuring device which is installed in a lower side of the operation cab and which measures a 3-axis channel vibration in real time by receiving the 3-axis channel signal and outputs an 3-axis vibration value based on the measured vibration; an electronic control unit which is installed between the operation seat and the vibration measuring device and which computes a mean vibration value and an impact vibration value generated in a predetermined time interval by receiving the 3-axis vibration value and outputs vibrations of ELV; and a display device which is installed in an interior of the operation cab and which displays the ELV on a LCD screen in real time, so that an operator easily monitors the ELV through the LCD screen.

Claims

1. In an earth moving machinery having an operation seat in an interior of an operation cab installed at an upper frame of a lower running body, the apparatus for monitoring an operator vibration for an earth moving machinery with an operation cab, comprising:

an operation seat which is installed in an interior of the operation cab and which includes an accelerometer for sensing and converting acceleration into a 3-axis channel vibration signal;

a vibration measuring device which is installed in a lower side of the operation seat and which measures a 3-axis vibration in real time by receiving the 3-axis channel signal and outputs an 3-axis vibration value based on the measured vibration;

an electronic control unit which is installed between the operation seat and the vibration measuring device and which computes a mean vibration value and an impact vibration value generated in a predetermined time interval by receiving the 3-axis vibration value and outputs vibrations of ELV(Exposure Limit Value); and

a display device which is installed in an interior of the operation cab and which displays the ELV on a LCD screen in real time, so that an operator easily monitors the ELV through the LCD screen.

2. The apparatus of claim 1, further comprising an alarm device for providing an operator of an alarm when a control signal received from the electronic control unit exceeds a predetermined set ELV limit.