Measuring equipment

• US 6,427,537 B1
• Filed: 12/05/2000
• Issued: 08/06/2002
• Est. Priority Date: 04/08/1998
• Status: Expired due to Fees

• Current Assignee: Nils Christer Svensson
• Original Assignee: Nils Christer Svensson
• Inventors: Svensson, Nils Christer
• Primary Examiner(s): Williams, Hezron
• Assistant Examiner(s): MILLER, ROSE MARY
• Application Number:
  US09/647,843
• Time in Patent Office: 609 Days
• Field of Search: 736/58, 736/59, 736/60, 736/61, 702/56
• US Class Current: 73/660
• CPC Class Codes: G01P 3/48 by measuring frequency of generated current or voltage in general G01R23/00
• CPC Class Codes: G01P 3/486 delivered by photo-electric detectors
• CPC Class Codes: G01P 3/489 Digital circuits therefor

Abstract

The present invention relates to measuring equipment (1) that includes at least two sensors (2, 3), each being adapted to sense a measurement magnitude, a measuring card (6) to which said sensors (2, 3) are coupled, and a computer unit to which the measuring card is coupled. At least one of the sensors (2) is adapted to sense prevailing frequencies of an object (11) to be measured. At least one of the sensors (3) is adapted to evaluate prevailing tacho-pulses of an object (11) to be measured. The circuits in said measuring card (16) are adapted to evaluate prevailing sound and vibrations generated by the rotating object (11) in response to information received with respect to prevailing frequency and prevailing tacho-pulses, by dividing the time distance between two tacho-pulses into a number of sub-sections and generating a circuit-internal tacho-signal for each sub-section.

Claims

1. Measuring equipment that includes at least two sensors, each of which is adapted to sense a measuring magnitude or parameter, a measuring card to which said sensors are connected, and a computer unit to which said measuring card is connected, wherein at least one of said sensors is adapted to sense the prevailing frequency of an object to be measured, wherein at least one of said sensors is adapted to sense prevailing tacho-pulses of an object to be measured, and wherein circuits included in said measuring card are adapted to evaluate prevailing sound and vibrations generated by the rotating object in response to received information relating to prevailing frequency and prevailing tacho-pulses, characterised by an electronic unit which is adapted to divide the time distance between two mutually sequential tacho-pulses into a predetermined number of sub-sections and which is also adapted to produce a tacho-signal for each selected sub-section.

2. Measuring equipment according to claim 1, characterised in that the duration of each sub-section evaluated between a first tacho-pulse and a second tacho-pulse is utilised within the time distance between said second tacho-pulse and a following third tacho-pulse.

3. Measuring equipment according to claim 1 in which the measuring card includes an A/D converter and a digital electronic unit, characterised in that analogue information relating to prevailing frequency is applied to the A/D converter, and information relating to prevailing tacho-pulses is applied to the electronic unit.

4. Measuring equipment according to claim 1, characterised in that the electronic unit functions to evaluate prevailing frequency during each of said sub-sections.

5. Measuring equipment according to claim 3, characterised in that said electronic unit is adapted to evaluate prevailing sound and vibrations by frequency analysis, and to enter these measurements into the computer unit.

6. Measuring equipment according to claim 1, characterised in that the computer unit is adapted to display on its display unit the front surface of an earlier known measuring unit constructed to the same end and to present prevailing values in the region of the presentation surface of said measuring unit.

7. Measuring equipment according to claim 3, characterised in that the duration of the sub-sections used is calculated from a number of earlier established sub-sections.

8. Measuring equipment according to claim 1, characterised in that said measuring card is provided with two mutually opposite electrical contact means, that a first electrical contact means is adapted for coaction with a corresponding electrical contact means on the computer unit, and that a second electrical contact means is adapted for coaction with a corresponding sensor-associated electrical contact means.

9. Measuring equipment according to claim 1, characterised in that said measuring card is connected to, or integrated with, a regulating equipment.

10. Measuring equipment according to claim 9, characterised in that one or several sensors for measurements on one or several objects are connected to a bus-system, and that one or several regulating systems also are connected to said bus-system.

11. Measuring card, adapted to be used within a measuring equipment according to claim 1 characterised in that an electronic unit is adapted to divide the time distance between two mutually sequential tacho-pulses into a predetermined number of sub-sections, and adapted to generate a tacho-signal representative for each sub-section.