Noise measuring device for a differential gear assembly
First Claim
1. A noise measuring device for a differential gear assembly which generates a noise under simulated driving conditions, comprisinga fixed jig for fixing front and rear parts of the differential gear assembly having a differential gear;
- a driving motor for rotating a drive shaft of said differential gear;
a torque sensor and a revolutions per minute (RPM) sensor attached between said drive shaft and said driving motor;
a computer displaying torque and RPM of said drive shaft after receiving through an analog-to-digital (A/D) converter signals from said torque sensor and said RPM sensor;
an analog-to-digital (A/D) converter, connected to said torque sensor and RPM sensor, for conveying a signal to said computer representative of torque and RPM;
braking means for providing a load to a driven shaft of said differential gear;
a sound sensing means installed adjacent said differential gear for generating an electrical signal proportional to a magnitude of said noise; and
a frequency analyzer which receives an output signal from said sound sensing means to analyze a characteristic of sound from said sound sensing means;
wherein said braking means includes a brake drum coupled with said drive shaft as one body;
a brake lining for covering a peripheral surface of said brake drum; and
a brake controller which provides a load to said differential gear by imparting a tensile stress to said brake lining.
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Accused Products
Abstract
A noise measuring device for a differential gear assembly which measures a noise generated from a differential gear under simulated driving conditions. The noise measuring device for the differential gear assembly includes: a driving motor for rotating a differential gear in a differential assembly; a braking apparatus comprised of a brake drum, a brake lining, and a brake operation knob, for providing a load of a driving condition to the differential gear; and sound sensing apparatus comprised of a sound level meter and a frequency analyzer, for measuring a noise from the differential assembly; and a driving condition sensing apparatus comprised of a torque sensor, an RPM sensor, and an A/D converter, for sensing the driving condition through the differential gear.
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Citations
1 Claim
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1. A noise measuring device for a differential gear assembly which generates a noise under simulated driving conditions, comprising
a fixed jig for fixing front and rear parts of the differential gear assembly having a differential gear; -
a driving motor for rotating a drive shaft of said differential gear; a torque sensor and a revolutions per minute (RPM) sensor attached between said drive shaft and said driving motor; a computer displaying torque and RPM of said drive shaft after receiving through an analog-to-digital (A/D) converter signals from said torque sensor and said RPM sensor; an analog-to-digital (A/D) converter, connected to said torque sensor and RPM sensor, for conveying a signal to said computer representative of torque and RPM; braking means for providing a load to a driven shaft of said differential gear; a sound sensing means installed adjacent said differential gear for generating an electrical signal proportional to a magnitude of said noise; and a frequency analyzer which receives an output signal from said sound sensing means to analyze a characteristic of sound from said sound sensing means; wherein said braking means includes a brake drum coupled with said drive shaft as one body; a brake lining for covering a peripheral surface of said brake drum; and a brake controller which provides a load to said differential gear by imparting a tensile stress to said brake lining.
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Specification
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- Resources
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Current AssigneeKia Motors Corporation (Kia Corp.)
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Original AssigneeKia Motors Corporation (Kia Corp.)
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InventorsJong, Han-Song, Choi, Eun-O
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Primary Examiner(s)CHAPMAN JR, JOHN E
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Application NumberUS08/697,240Time in Patent Office573 DaysField of Search73/593, 73/162, 73/118.1, 73/660US Class Current73/593CPC Class CodesG01M 13/028 Acoustic or vibration analysis
