FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION
Noise Source detection device in automobile


APPLICANTS
TATA MOTORS LIMITED, an Indian company
having its registered office at Bombay House,
24 Homi Mody Street, Hutatma Chowk,
Mumbai 400 001 Maharashtra, India
INVENTORS
Amit Sharma and Mullapudi Dattatreyudu
Both are Indian Nationals
of TATA MOTORS LIMITED an Indian company
having its registered office at Bombay House,
24 Homi Mody Street, Hutatma Chowk,
Mumbai 400 001 Maharashtra, India

PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be performed


FIELD OF THE INVENTION
This invention relates to noise source detection device and more particularly it relates to noise source detection device with a mountable and movable base for vehicle under body during running as well as in test rig inside the test facility.
BACKGROUND OF INVENTION
Generally noise from vehicle under body is identified or observed through inspection pit, when it is on the 4- posters testing system. In this case, it is very difficult to find out the source of the noise and is not recommended from the safety point of view. The same difficulty is faced while measuring the noise of the Sub-frame in vehicles. There are similar types of devices for noise source detection such as intensity probe microphone, but this device is not suitable to go into inaccessible places and with this device ,source of noise can not be visualized.
In order to address the above said difficulties, new device has been developed so that noise source can be visualized, traced and also noise level can be estimated with the help of microphone. The measurements can be done while the vehicle is in running and also in stationary condition. With this device the root cause analysis will become easier than the previous practices.
THE OBJECT OF THIS INVENTION
The main object of this invention is to provide noise detection device for pin pointing the source of noise from the vehicle during running and on the test rig.
Another object of the present invention is to provide a device that can visualize the source of noise and can estimate the noise level.

STATEMENT OF INVENTION
This invention relates to Noise source detection device comprising a mountable base fitted underneath vehicle by fixing means or a motor driven movable wheel base capable of detecting the noise and moving towards the source of noise; a first arm member for height adjustment is fitted on the said mountable or movable base; a second arm member for span adjustment clamped on the said first arm member by clamping device; a spherical joint means whose one end is attached to one end of the second arm member and other clamped between the clamping plate assembly for facilitating required angular movement of the said clamping plate assembly ; camera means mounted on said clamping plate assembly by fastening means; a microphone is held firmly in the said clamping plate assembly; wherein the noise source detection device can trace, visualize, estimate the noise level and capable to move towards the sound source. This invention also relates to a method of tracking noise and movement of the said noise detection device towards the source of noise
BRIEF DESCRIPTION OF INVENTION
In accordance with the present invention, noise source detection device comprises; a mountable base (1) which is to be fitted to the vehicle under body with the help of vacuum cup, first arm member (3) for adjusting height which is having threads at one end is fitted to the mountable base, second arm member (4) for adjusting span which is clamped to said first arm member (3), clamping device (5) for clamping second arm member (4 ) to the said first arm member (3) so that second arm member (4) can be rotated and adjusted to the required height and span.
Second embodiment, in accordance with this invention, noise source detection device comprises movable base (2) for testing the vehicles on the test rig.

The noise source detection device having movable base (2) is capable of detecting the noise and move towards the source
BRIEF DESCRIPTION OF DRAWINGS
Figure-1 shows the front view of the noise source detection device with
mountable base.
Figure-2 shows the top view of the noise source detection device with mountable
base.
Figure-3 shows the front view of movable base of the noise source detection
device.
Figure-4 shows the top view of movable base of the noise source detection device.
Figure-5 shows the block diagram of the closed loop system of the noise source
detection device.
DETAILED DESCRIPTION OF INVENTION
Referring now to the drawings wherein the showings are for the purpose of illustrating a preferred embodiment of the invention only, and not for the purpose of limiting the same,
Now referring to figure-01 to figure-05, In accordance with the present invention, noise source detection device comprises; a mountable base (1) which is to be fitted to the vehicle under body with the help of vacuum cup, first arm member (3) for adjusting height which is having threads at one end is fitted to the mountable base, second arm member (4) for adjusting span which is clamped to said first arm member (3), clamping device (5) for clamping second arm member (4 ) to the said first arm member (3) so that second arm member (4) can be rotated and adjusted to the required height and span, spherical joining means (6), clamping

plates (7) , camera means (8) mounted on said clamping plates and microphone connected to said clamping plates.
Said second arm member (4) comprises a spherical joint means (6) at one end. One end of said spherical joint means (6) is connected with said second arm member (4) and other end is attached with said clamping plates (7) so that required angular position of the said clamping plates can be adjusted.
The said camera means (8) is mounted on the clamping plates (7) with the help of fasteners and the microphone (9) is held firmly between the said clamping plates
(7).
Second embodiment, in accordance with this invention, noise source detection
device comprises movable base (2) for testing the vehicles on the test rig. Said
movable base comprises of motor driven wheel base. The said movable base (2) is
having threaded hole through which the said first arm member (3) is bolted. The
said mountable base (1) of first embodiment is replaced with said movable base
(2).
The noise source detection device having movable base (2) is capable of detecting the noise and move towards the source with help of the microphone (9).
The movement of the said device towards the source of noise is achieved by a 'B' program which will interact with 4A' software.
The 'A' software will acquire the data with the help of microphone (9) which is mounted on the movable base (2) and said 'A' software will generate universal file which is in ASCII (American Standard Code for Information Interchange) of the sound levels in dB. The 'B' program will read the said universal file and store the dBA values into a matrix. Based on cut-off value of sound in dBA ( 120 dBA range), said 'B' programme will send the signal to the motor of said movable base

(2) and the movable base (2) along with the noise detection device will move towards the source of noise. This will repeat till it reaches the cut-off dBA level. The cut-off dBA value will be decided based on the predetermined value.
For clamping plate assembly (7), there can be automated feedback system so that same can be moved in desired direction in order to visualize the noise source.
First arm member (3) and second arm member (4) can also be automated with the help of rack and pinion driven by motor which is controlled by the said 4B' program.
The foregoing description is a specific embodiment of the present invention. It should be appreciated that this embodiment is described for purpose of illustration only, and that numerous alterations and modifications may be practiced by those skilled in the art without departing from the spirit and scope of the invention. It is intended that all such modifications and alterations be included insofar as they come within the scope of the invention as claimed or the equivalents thereof.

WE CLAIM
1. Noise source detection device comprising
a mountable base fitted underneath vehicle by fixing means or a motor driven movable wheel base capable of detecting the noise and moving towards the source of noise;
a first arm member for height adjustment is fitted on the said mountable or movable base;
a second arm member for span adjustment clamped on the said first arm member by clamping device;
a spherical joint means whose one end is attached to one end of the ■ second arm member and other clamped between the clamping plate assembly for facilitating required angular movement of the said clamping plate assembly ;
camera means mounted on said clamping plate assembly by fastening means;
a microphone is held firmly in the said clamping plate assembly;
wherein the noise source detection device can trace, visualize, estimate the noise level and capable to move towards the sound source.
2. The noise detection device as claimed in claim 1, wherein the clamping device is used for clamping second rod on first rod such that the second arm member can be rotated and adjusted to required height and span.
3. The noise detection device as claimed in claim 1, wherein the said camera means and the said microphone are mounted on the clamping assembly in such a way that both are facing in same direction and having axis parallel to each other.

4. The noise detection device as claimed in claim 1, wherein the said first arm member along with the assembly mounted on it is mounted on the mountable base when use for testing the vehicle in running condition.
5. The noise detection device as claimed in claim 1, wherein the said first arm member along with the assembly mounted on it is mounted on the motor driven movable wheel base capable of detecting the noise and moving towards the source of noise when used for testing the vehicles on test rig.
6. The noise detection device as claimed in claim 1, wherein a motor and transmission means are provided to the said motor driven movable wheel base.
7. The method of tracking noise and movement of the said noise detection device towards the source of noise comprising the steps of;

a) Acquiring the data with the help of said microphone mounted on the clamping plate assembly by using the said (A' software;
b) Generating a universal file of the sound level in Decibels (dB) by using said 'A' software;
c) Storing the dBA values in to a matrix after said specially developed 'B'
program reads the said universal file;
d) Giving signal to the said motor of the said movable base based on the cut-off value of sound pressure level in dBA;
e) Moving the said movable base along with the said noise detection device towards the source of noise after receiving the signal from the 'B' Program till it reaches the predetermined cut-off dBA level.
8) The noise detection device as hereinabove claimed is with reference to the accompanying drawings.

9) The method of tracking noise and movement of the said noise detection device towards the source of noise as described in the substantially as herein described with reference to accompanying drawings.
Dated this 31st day of December 2008