Description:FIELD OF THE INVENTION
[001] The present invention relates to a vehicle. More particularly, the present invention relates to an anti-theft device for a vehicle.

BACKGROUND OF THE INVENTION
[002] In present vehicle layouts, an anti-theft device may be provided to prevent theft of a vehicle. Generally, the anti-theft device comprises a detection unit and an alert unit. The detection unit is configured to detect theft of the vehicle and the alert unit is configured to generate an alert upon detection of theft by the detection unit of the anti-theft device. However, one of the major disadvantages of such conventionally available anti-theft devices is that the detection unit and the alert unit are disposed in different areas of the vehicle and are connected by means of a wiring harness. In an event wherein a hacker/unauthorized person wishes to steal the vehicle, a tampering of the wiring harness between the detection unit and the alert unit would lead to failure of the anti-theft device. Further, the anti-theft device is powered by a battery of the vehicle. In an event such battery is tampered, the anti-theft device of the vehicle will be disabled and, therefore, no alert will be generated upon theft of the vehicle. Moreover, the disposition of the conventional anti-theft device is challenging in compact vehicle layout leading to packaging constraints.
[003] In view of the foregoing, it is desirable to overcome a least the above-mentioned disadvantages of the prior art.

SUMMARY OF THE INVENTION
[004] In one aspect of the invention, a system for preventing theft of a vehicle is disclosed. The system comprises a control unit and an anti-theft device. The control unit is disposed in the vehicle. The anti-theft device is adapted to be disposed in a pre-defined region of a frame assembly of the vehicle. The anti-theft device comprises a detection unit and an alert unit. The control unit is configured to receive a user input through an external device and activate the detection unit upon the user input being indicative of a vehicle lock condition. The detection unit of the anti-theft device is communicatively coupled to the control unit. The detection unit is configured to detect one or more variations in the vehicle lock condition. The detection unit further configured to determine whether the one or more variations exceeds one or more pre-set variation thresholds. The alert unit is integrally formed with the detection unit and also communicatively coupled to the detection unit. The alert unit is activated by the detection unit to raise one or more alerts when one or more variations detected in the vehicle exceed one or more pre-set variation thresholds. The pre-defined region of the vehicle being between a pair of left and right members of a main frame of the frame assembly in a front portion of the vehicle and behind the pipe in the vehicle front-rear direction.
[005] In an embodiment, the frame assembly comprises one or more upper frame members and one or more lower frame members extending rearwardly from the head pipe. The anti-theft device being provided on one of: the lower frame member and at a location between the lower frame members.
[006] In an embodiment, the pre-defined region is one of: a location below a fuel tank and above a prime mover of the vehicle and a location in front of the primer mover in the vehicle front-rear direction.
[007] In an embodiment, the anti-theft device is connected to a main power unit of the vehicle and an auxiliary power unit. When the one or more variations in the vehicle is indicative of a disconnection between the main power unit and the anti-theft device, the auxiliary power unit powers the anti-theft device. The auxiliary power unit is formed integrally with the anti-theft device.
[008] In an embodiment, the one or more variations of the vehicle comprises at least one of movement of the vehicle along one or more vehicle axis, change in orientation of a steering assembly of the vehicle and movement of a center stand or a side stand of the vehicle.
[009] In an embodiment, the user input is indicative of a vehicle lock condition, or a vehicle unlock condition. The vehicle lock condition includes at least one of obstruction of steering assembly movement of the vehicle and activation of brakes to prevent wheel movement of the vehicle. The vehicle unlock condition comprises at least one of steering assembly movement of the vehicle and wheel movement of the vehicle.
[010] In another aspect of the present invention, a method for preventing theft of a vehicle is disclosed. The method comprises a step of receiving a user input through an external device. The step of receiving is performed by a control unit. The method further comprises a step of activating a detection unit of an anti-theft device upon the user being indicative of a vehicle lock condition. The step of activating is performed by the control unit. The method further comprises a step of detecting one or more variations in the vehicle. The step of detecting is performed by the detection unit of the anti-theft device of the vehicle. The detection unit is communicatively coupled with the control unit. The method further comprises a step of activating an alert unit of the anti-theft device upon determination of one or more variations exceeding one or more pre-set variation thresholds. The alert unit is integrally formed with the detection unit. The alert unit is also communicatively coupled to the detection unit.
[011] In an embodiment, the one or more variations of the vehicle comprises at least one of movement of the vehicle along one or more vehicle axis, change in orientation of a steering assembly of the vehicle and movement of the side stand of the vehicle.
[012] In an embodiment, the user input is indicative of a vehicle lock condition, or a vehicle unlock condition. The vehicle lock condition includes at least one of obstruction of steering assembly movement of the vehicle and activation of brakes to restrain wheel movement of the vehicle. The vehicle unlock condition comprises at least one of steering assembly movement of the vehicle and wheel movement of the vehicle.
[013] In yet another aspect of the present invention, an anti-theft device for the vehicle is disclosed. The anti-theft device comprises a detection unit and an alert unit. The detection unit is communicatively coupled to a control unit of the vehicle. The detection unit is configured to be activated upon receipt of a user input by the control unit wherein the user input is indicative of a vehicle lock condition. The detection unit, upon being activated, is configured to detect one or more variation in the vehicle in the vehicle lock condition and also configured to determine whether the one or more variations in the vehicle exceed one or more pre-set variations thresholds. Upon determination of one or more variations exceeding the one or more pre-set variation thresholds, the detection unit activates the alarm unit to generate one or more alarms to prevent theft of the vehicle. The detection unit is integrally formed with the alert unit and the detection unit is communicatively coupled to the alert unit.
[014] In an embodiment, the anti-theft device is connected to a main power unit of the vehicle and an auxiliary power unit. Upon disconnection of the anti-theft device and the main power unit in the vehicle lock condition owing to one or more variation in the vehicle, the auxiliary power unit powers the anti-theft device. The auxiliary power unit is formed integrally with the anti-theft device.
[015] In an embodiment, the alert unit of the anti-theft device comprises one or more alert generating sub-units. The one or more alert generating sub-units are configured to provide at least one of an audio alert, a visual alert, and a communication including at least one of voice, call and text transmitted to a personal digital assistant of a rider of the vehicle.
[016] In an embodiment, the one or more variation of the vehicle comprises at least one of movement of the vehicle along one or more vehicle axis, change in orientation of a steering assembly of the vehicle and movement of a center stand or a side stand of the vehicle.
[017] In an embodiment, the external device being one of a mechanical key, a key fob and a personal digital assistant of a user of the vehicle. The key fob and the personal digital assistant of the user of the vehicle being communicatively coupled to the control unit. The key fob and the personal digital assistant being configured to transmit the user input upon acceptance of authentication and pairing request by the control unit of the vehicle.
[018] In an embodiment, the user input is indicative of a vehicle lock condition, or a vehicle unlock condition. The vehicle lock condition includes at least one of obstruction of steering assembly movement of the vehicle and activation of brakes to restrain wheel movement of the vehicle. The vehicle unlock condition comprises at least one of steering assembly movement of the vehicle and wheel movement of the vehicle.

BRIEF DESCRIPTION OF THE DRAWINGS
[019] Reference will be made to embodiments of the invention, examples of which may be illustrated in accompanying figures. These figures are intended to be illustrative, not limiting. Although the invention is generally described in context of these embodiments, it should be understood that it is not intended to limit the scope of the invention to these particular embodiments.
Figure 1 illustrates a block diagram of a system for preventing theft of a vehicle, in accordance with an embodiment of the present invention.
Figure 2 illustrates a schematic view of the vehicle, in accordance with an embodiment of the present invention.
Figure 3 illustrates a schematic view of a frame structure of the vehicle, in accordance with an embodiment of the present invention.
Figure 4 illustrates a method for preventing theft of a vehicle, in accordance with an embodiment of the present invention.
Figure 5a and 5b illustrates a method of remote starting of a vehicle, in accordance with an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION
[020] Various features and embodiments of the present invention here will be discernible from the following further description thereof, set out hereunder.
[021] For the purpose of the present invention, the term “vehicle” includes bicycles, scooters, trikes, motorcycles, rickshaws, lorries, cars, trucks, buses etc. The term “vehicle” also includes electric vehicles, hybrid vehicles and conventional internal combustion engine vehicles.
[022] Figure 1 illustrates a block diagram of a system 100 for preventing theft of a vehicle 10, in accordance with an embodiment of the present invention.
[023] As shown in Figure 1, the system 100 comprises a control unit 102 and an anti-theft device 105. The control unit 102 is communicatively coupled to an external device 104. In a non-limiting example, the external device 104 can be a mechanical key capable of being inserted into the ignition lock of the vehicle 10. In another non-limiting example, the external device 104 can be a key fob configured to be communicatively coupled with the control unit 102. In another non-limiting example, the external device 104 can be a personal digital assistant of a user of the vehicle 10, such as an owner or a rider, configured to be communicatively coupled with the control unit 102. The external device 104 provides user input to the control unit 102 indicative of vehicle lock condition or vehicle unlock condition. These examples should not be construed as limiting and the other now known or later developed external devices 104 capable of providing user input indicative of lock condition or unlock condition of the vehicle 10 are well within the scope of the present invention.
[024] In a non-limiting example, the control unit 102 is configured to verify Internet Protocol (IP) address of the external device 104 with a pre-set authorized IP address for authentication and pairing of the control unit 102 and the external device 104.
[025] The vehicle lock condition includes obstruction of a steering assembly movement of the vehicle 10 and/or activation of brakes to prevent wheel movement of the vehicle 10. It is to be understood that vehicle unlock conditions are opposite to the vehicle lock conditions i.e., steering assembly movement of the vehicle 10 and deactivation of brakes to allow wheel movement of the vehicle 10. However, the above-mentioned vehicle lock conditions are not exhaustive and other vehicle lock conditions as well as vehicle unlock conditions can be defined by the manufacturer of the vehicle 10.
[026] The anti-theft device 105 comprises a detection unit 106 and an alert unit 108. The detection unit 106 of the anti-theft device 105 is communicatively coupled to the control unit 102 of the vehicle 10. The detection unit 106 is configured to be activated upon control unit 102 receiving a user input indicative of vehicle lock condition and the detection unit 106 is configured to be deactivated upon control unit 102 receiving a user input indicative of vehicle unlock condition. The detection unit 106 of the anti-theft device 105 is further configured to detect one or more variations in the vehicle 10. Such variations are pre-defined in the detection unit 106 of the vehicle 10. It is to be understood that detection unit 106 is configured to detect variations in the vehicle 10 in activated state or when the user input is indicative of vehicle lock condition. The detection unit 106 is further configured to determine if the one or more variations exceeds one or more pre-set variation thresholds. In a non-limiting example, the one or more variations is movement of vehicle 10 along one or more vehicle axis including longitudinal axis (along front-rear direction of the vehicle), lateral axis (along left-right side of the vehicle) and vertical axis (along up-down direction of the vehicle). In a non-limiting example, the one or more variations is change in orientation of a steering assembly of the vehicle 10. In a non-limiting example, the one or more variation is movement of a center stand or a side stand of the vehicle 10. The pre-set variation thresholds against which the one or more variations are compared are also pre-stored in the control unit 102 and can be decided by the manufacturer of the vehicle 10. In one example, the pre-set threshold value for movement of vehicle 10 in front rear direction can be set as at least 50m. Similarly, in one example, pre-set value for degree of rotation of the steering assembly can be set as at least 30 degrees. However, these examples should not be construed as limiting as different variations along with pre-set threshold values can be defined by the manufacturer of the vehicle 10.
[027] In a non-limiting example, the detection unit 106 comprises or is in communication with one or more vibration sensors, one or more location sensors and/or one or more angular velocity sensors for detection of the one or more variations.
[028] The detection unit 106, upon determination that the one or more variations in the vehicle 10 exceeds the pre-set variation thresholds, activates the alert unit 108 to raise one or more alerts. In other words, the alert unit 108 is configured to raise one or more alerts upon receiving a signal from the detection unit 106 that the one or more variations in the vehicle 10 exceeds the pre-set variation thresholds. The alert unit 108 can have one or more alert generating sub-units such as an audio alert sub-unit for generating an audio alert, a visual alert sub-unit for generating a visual alert and a communication sub-unit for sending text, call or voice messages to the rider/owner/user of the vehicle 10 indicating a theft of the vehicle 10 or attempt thereto. The audio alert is provided using one or more hooters, beepers etc. The visual alert is provided using blinking of lights and lamps of the vehicle 10.
[029] Also, the anti-theft device 105 is connected to a main power unit 110 and an auxiliary power unit 112. The anti-theft device 105, upon activation, uses power from the main power unit 110 such as battery of a vehicle 10. However, when the main power unit 110 of the vehicle 10 is tampered with during a theft operation, the auxiliary power unit 112 provides power to the anti-theft device 105 of the vehicle 10. The auxiliary power unit 112 is integrally formed with the anti-theft device 105 and is used to circumvent a situation wherein the power unit 110 of the vehicle 10 is tampered. It is to be understood that auxiliary power unit 112 supplies power to the anti-theft device 105 when the main power unit 110 is disabled and when the anti-theft device 105 is in an active mode.
[030] It is to be noted that the anti-theft device 105 is disposed at a pre-defined region on the vehicle 10 which shall be discussed in Figure 2 and Figure 3 of the vehicle 10.
[031] Figure 2 illustrates a schematic view of a vehicle 10, in accordance with an embodiment of the present invention. Figure 3 illustrates a schematic view of a frame structure of the vehicle 10, in accordance with an embodiment of the present invention.
[032] Arrows provided in the top right corner of figures depicts direction with respect to the vehicle 10, wherein an arrow F denotes front direction, an arrow R indicates rearward direction, an arrow UP denotes upward direction, an arrow DW denoted downward direction, as and where applicable.
[033] The vehicle 10 shown in Figure 2 is a motorcycle. However, this should not be construed as limiting as the anti-theft device 105 of the present invention can be mounted in different type of vehicles as already stated earlier. The vehicle 10 shown in Figure 2 comprises a head pipe 11 and a main frame assembly 16 (shown in Figure 3) extending rearwardly from the head pipe 11 in front-rear direction. The main frame assembly 16 comprises one or more main tubes 18 (shown in Figure 3) extending rearwardly from the head pipe 11 and one or more down tubes 20 extending rearwardly and downwardly from the head pipe 11. In a non-limiting example, structure of the main frame assembly 16 is a combination of one or more upper frame members and one or more lower frame members extending rearwardly from the head pipe 11. The anti-theft device 105 is provided on one of: the lower frame member and at a location between the lower frame members. In another non-limiting example, the structure of the frame assembly 16 includes a down tube and an upper tube extending rearwardly from the head pipe 11. A fuel tank 12 is disposed on the one or more main tubes 18 and a prime mover 14 is supported by one or more down tubes 20 of the vehicle 10. The anti-theft device 105 of the vehicle 10 is disposed in a pre-defined region of the frame assembly 16. In a limiting example, as shown in Figure 3, the anti-theft device 105 is disposed/mounted on the down tube 20 of the vehicle 10. In case of a pair of down tubes 20, the anti-theft device 105 can be disposed on any one of the down tubes 20. Also, although not shown, in another non-limiting example, the anti-theft device 105 can be located on the main tube 18 or one of the main tubes 18 of the frame assembly 16 in a region between the fuel tank 12 of the vehicle 10 and the prime mover 14 of the vehicle 10. In other words, the anti-theft device 105 can be located between a lower surface of the fuel tank 12 and an upper surface of the prime mover 14. In another non-limiting example, the anti-theft device 105 can be located in front of the prime mover 14 in the vehicle front-rear direction. However, these examples should not be construed as limiting and the anti-theft device 105 can be disposed in other parts of the vehicle 10. Moreover, the anti-theft device can also be disposed in different type of vehicles as already stated in preceding paragraphs.
[034] The disclosed disposition of the anti-theft device 105 in the pre-defined region of the vehicle 10 addresses packaging concerns in compact vehicle layouts. Further, the pre-defined region being in the vicinity of potential vehicle attack zones such as battery and the steering lock, addresses signal latency issues which otherwise exist in conventional vehicle layouts. Further, the disclosed anti-theft device in another embodiment when integrated with an immobilizer unit reduces the overall system latency as it is disposed in vicinity of the prime mover of the vehicle 10.
[035] Figure 4 illustrates a method 200 for preventing theft of a vehicle, in accordance with an embodiment of the present invention.
[036] As shown, at step 201, the method 200 starts. The method 200 comprises a step 202 of receiving a user input through an external device 104. The step 202 of receiving is performed by a control unit 102. In a non-limiting example, the external device 104 can be a mechanical key capable of being inserted into the ignition lock of the vehicle 10. In a non-limiting example, the external device 104 can be a key fob configured to be communicatively coupled with the control unit 102. In a non-limiting example, the external device 104 can be a personal digital assistant of a rider/owner of the vehicle 10 configured to be communicatively coupled with the control unit 102. The external devices 104 provides user input to the control unit 102 indicative of vehicle lock condition or vehicle unlock condition. These examples should not be construed as limiting and the other now known or later developed devices capable of providing user input indicative of lock condition or unlock condition of the vehicle 10 are well within the scope of the present invention.
[037] The method 200 further comprises a step 203 of activating a detection unit 105 of an anti-theft device 105 upon the user being indicative of a vehicle lock condition. The step of activating 203 is performed by the control unit 102 and the anti-theft device 105. The vehicle lock condition includes obstruction of a steering assembly movement of the vehicle 10 and/or activation of brakes to prevent wheel movement of the vehicle 10. It is to be understood that vehicle unlock conditions are opposite to the vehicle lock conditions i.e., steering assembly movement of the vehicle 10 deactivation of brakes to allow wheel movement of the vehicle 10.
[038] The method 200 further comprises a step 204 of detecting one or more variations in the vehicle 10. The step 204 of detecting is performed by the detection unit 106 of the anti-theft device 105 of the vehicle 10. The detection unit 106 is communicatively coupled with the control unit 102. In a non-limiting example, the one or more variation is movement of vehicle 10 along one or more vehicle axis including longitudinal axis (along front-rear direction of the vehicle), lateral axis (along left-right side of the vehicle) and vertical axis (along up-down direction of the vehicle). In a non-limiting example, the one or more variation is change in orientation of a steering assembly of the vehicle 10. In a non-limiting example, the one or more variation is movement of side stand of the vehicle 10. The pre-set variation threshold values against which such variations are compared are pre-stored in the control unit 102 and can be decided by the manufacturer of the vehicle 10. In one example, the pre-set variation threshold value for movement of vehicle 10 in front rear direction can be set as at least 50m. Similarly, in one example, pre-set variation value for degree of rotation of the steering assembly can be set as at least 30 degrees from the steering lock position. However, these examples should not be construed as limiting as different variations along with pre-set variations threshold values can be defined by the manufacturer of the vehicle 10.
[039] The method further comprises a step 205 of activating an alert unit 108 of the anti-theft device 105 upon determination of one or more variations exceeding one or more pre-set variation thresholds. The alert unit 108 is integrated with the detection unit 106. The alert unit 108 is also communicatively coupled to the detection unit 106. The alert unit 108 can have one or more alert generating sub-units such as an audio alert sub-unit, a visual alert sub-unit and a communication sub-unit capable of sending text, call or voice messages to the rider/owner of the vehicle 10 indicating a theft of the vehicle 10 or attempt thereto. The audio alert is provided using one or more hooters. The visual alert is provided using blinking of lights and lamps of the vehicle 10. At step 206, the method 200 stops.
[040] Figure 5 illustrates a method of remote starting of a vehicle 10, in accordance with an embodiment of the present invention.
[041] The vehicle 10 as per the present invention also comprises a remote starting feature. For instance, if the rider/owner loses an ignition key of the vehicle 10, a side lock of the vehicle 10 is often breakable. However, an ignition lock wire is difficult to break into and tamper with. In view thereof, the present invention additionally provides the user/rider/owner of the vehicle 10 to start the vehicle 10 without the ignition key. The user/rider/owner, generically referred to as a user, is provided with an external device, such as but not limited to a remote key fob, interacting with an immobilizer unit and/or the anti-theft device 105 of the vehicle 10 to authorize vehicle usage. Further, in low light/ night conditions, the insertion of a mechanical key may be difficult, a remote key eliminates the insertion procedure altogether. The remote key may interact with an immobilizer unit and/or the anti-theft device 105 which has a control unit 102 receiving a signal from the remote key and/or the anti-theft device 105 configured to enable vehicle operation upon authentication via the remote key. In the remote key (parallel key to a mechanical key) system, the remote key is used for starting the vehicle 10 as well as connecting electrical loads of the vehicle 10. The remote key merely comprises a button by pressing of which the vehicle 10 is locked/unlocked. The remote key authentication to vehicle 10 is processed irrespective of the ignition key being in ON or OFF condition. However, the vehicle 10 must necessarily be in a neutral position to receive a signal from the remote key wirelessly. The wireless communication channel between the remote key and the control unit 102 may be established via Bluetooth, Wi-Fi, infrared, cellular network, and other forms of wireless communication media. The control unit 102 of the immobilizer energizes a starter relay stimulating ignition ON condition. If the vehicle 10 is in gear engaged condition, the starter relay will not be energized and as a result of this the vehicle 10 will not start even if the remote key is activated.
[042] To start the vehicle 10 remotely, the vehicle 10 should be in neutral. The vehicle 10, in neutral, can be easily started using the remote key without inserting the ignition key or any manual efforts.
[043] The method 500 for remotely starting the vehicle 10 comprises several steps. At step 501, the method 500 starts. At step 502, an immobilizer unit or an anti-theft device 105 will check availability of a remote key fob. At step 503, upon availability of the remote key fob in pre-defined area and approval of authentication request being received by the immobilizer unit or anti-theft device 105, the remote key fob will be paired. At step 504, the immobilizer unit or the anti-theft device 105 will check whether a pre-defined input button has been pressed for a time period greater than a pre-defined time period. If yes, the method will move to step 505, else will return to 504. At step 505, the method will enable ignition control unit 102 and other loads of the vehicle 10. At step 506, the method will verify the state of gear of the vehicle 10. If the vehicle 10 is in neutral state, the method will move to step 507, else the method will move to step 508. At step 507, the starter relay of the vehicle 10 will be enabled and the vehicle 10 will be started. At step 508, the starter relay of the vehicle 10 will not be enabled and the vehicle 10 will not start. At step 509, the method 500 stops.
[044] The claimed features/method steps of the present invention as discussed above are not routine, conventional, or well understood in the art, as the claimed features/steps enable the following solutions to the existing problems in conventional technologies. Specifically, the technical problem of tampering with anti-theft device has been solved by the present invention.
[045] In the present invention, the detection unit and the alert unit of the anti-theft device are formed integrally. Specifically, the alert unit is mounted on top of the anti-theft device. In other words, no wiring harness is used to connect the detection unit and the alert unit and, therefore, the anti-theft device cannot be disabled by tampering a wiring harness. The anti-theft device is strategically dispositioned on the main frame assembly of the vehicle such that the accessibility to the anti-theft device is only after removing the fuel tank thereby adding to the safety of the vehicle. In addition, the anti-theft device includes a GPS for detecting a change in location of the vehicle when the vehicle is in a locked state further adding to the safety aspect of the vehicle. The anti-theft device is covered by one or more cover members this not only adds to the safety feature but also protects the anti-theft device from damage due to external factors such as rain and dust.
[046] In the present invention, an auxiliary power unit is formed integrally with anti-theft device. In case of disabling or tampering with the main power unit of the vehicle, the anti-theft device will be powered by the auxiliary power unit and an alert will be generated.
[047] In the present invention, the assembly time of mounting the anti-theft device is reduced as there is no wiring harness between the detection unit and the alert unit of the anti-theft device.
[048] The present invention improves the overall security of the vehicle as the anti-theft device of the present invention cannot be disabled by wire tampering or battery tampering.
[049] While the present invention has been described with respect to certain embodiments, it will be apparent to those skilled in the art that various changes and modification may be made without departing from the scope of the invention as defined in the following claims.

List of Reference Numerals

10-vehicle
11-head pipe
12- fuel tank
14- prime mover
16-frame assembly
18- main tubes
20- down tubes
100-system
102-control unit
104-external device
105- anti-theft device
106-detection unit
108- alert unit
110- power unit
112- auxiliary power unit
, Claims:1. A system (100) for preventing theft of a vehicle (10), the system (100) comprising:
a control unit (102) disposed in the vehicle (10);
an anti-theft device (105) disposed in the vehicle (10), the anti-theft device (105) adapted to be disposed in a pre-defined region of a frame assembly of the vehicle (10), the anti-theft device (105) comprising a detection unit (106) and an alert unit (108),
the control unit (102) being configured to: receive a user input through an external device (104); and activate the detection unit (106) upon the user input being indicative of a vehicle lock condition;
the detection unit (106) communicatively coupled to the control unit (102), the detection unit (106) being configured to detect one or more variations in the vehicle (10); and determine whether the one or more variations exceeds one or more pre-set variation thresholds;
and
the alert unit (108), the alert unit (108) being integrated and communicatively coupled to the detection unit (106), the alert unit (108) being configured to be activated by the detection unit (106) to raise one or more alerts upon determination of the detected one or more variations exceeding the one or more pre-set variation thresholds;
wherein the pre-defined region of the vehicle (10) being between a pair of left and right members of a main frame of the frame assembly (16) in a front portion of the vehicle (10) and behind the head pipe(11) in the vehicle front-rear direction.

2. The system (100) as claimed in claim 1, wherein the frame assembly comprises one or more upper main frame members and one or more lower frame members extending rearwardly from the head pipe, the anti-theft device (105) being provided on one of: the lower frame member and at a location between the lower frame members.

3. The system (100) as claimed in claim 1, wherein the pre-defined region being one of: a location below a fuel tank (12) and above a prime mover (14) and a location in front of the prime mover (14) in the vehicle front-rear direction.

4. The system (100) as claimed in claim 1, wherein the anti-theft device (105) being connected to a main power unit (110) of the vehicle (10), and the anti-theft device (105) being alternately powered by an auxiliary power unit (112), wherein upon the one or more variations in the vehicle (10) being indicative of a disconnection between the anti-theft device (105) and the main power unit (110), the anti-theft device (105) being powered by the auxiliary power unit (112); and the auxiliary power unit (112) being formed integrally with the anti-theft device (105).

5. The system (100) as claimed in claim 1, wherein the one or more variations of the vehicle (10) comprises at least one of: movement of the vehicle (10) along one or more vehicle axes; change in orientation of a steering assembly of the vehicle (10) and movement of side stand or a center stand of the vehicle (10)

6. The system (100) as claimed in claim 1, wherein the user input being indicative of at least one of the vehicle lock condition and a vehicle unlock condition, wherein the vehicle lock condition comprises at least one of obstruction of a steering assembly movement of the vehicle (10) and activation of brakes to prevent wheel movement of the vehicle (10); and the vehicle unlock condition comprises at least one of the steering assembly movement of the vehicle (10) and the wheel movement of the vehicle (10).

7. A method (200) for preventing theft of a vehicle (10), the method (200) comprising steps of:
- receiving, by a control unit (102), a user input through an external device (104);
- activating, by the control unit (102), a detection unit (106) of an anti-theft device (105) upon the user input being indicative of a vehicle lock condition;
- detecting, by the detection unit (106) of the anti-theft device, one or more variations in the vehicle (10), the detection unit (106) being communicatively coupled to the control unit (102); and
- activating, by the detection unit (106), an alert unit (108) of the anti-theft device (105) upon the determination of the detected one or more variations exceeding one or more pre-set variation thresholds; the alert unit (108) being integrated and communicatively coupled to the detection unit (106).

8. The method (200) as claimed in claim 7, wherein the one or more variations of the vehicle (10) comprises at least one of: movement of the vehicle (10) along one or more vehicle axes; change in orientation of a steering assembly of the vehicle (10); and movement of a side stand or centre stand of the vehicle (10).

9. The method (200) as claimed in claim 7, wherein the user input being indicative of at least one of the vehicle lock condition and a vehicle unlock condition, wherein the vehicle lock condition comprises at least one of obstruction of a steering assembly movement of the vehicle (10) and activation of brakes to restrain wheel movement of the vehicle (10); and the vehicle unlock condition comprises at least one of the steering assembly movement of the vehicle (10) and the wheel movement of the vehicle (10).

10. An anti-theft device (105) for a vehicle (10), the anti-theft device (105) comprising:
a detection unit (106), the detection unit (106) communicatively coupled to a control unit (102) of the vehicle (10), the detection unit (106) being configured to be activated upon receipt of a user input by the control unit (102) from an external device (104), wherein the user input being indicative of a vehicle lock condition, the detection unit (106) being configured to detect one or more variations in the vehicle (100) in the vehicle lock condition; and
an alert unit (108), the alert unit (108) being integrated and communicatively coupled to the detection unit (106), the alert unit (106) being configured to be activated by the detection unit (106) and generate one or more alerts upon determination of the detected one or more variations exceeding one or more pre-set variation thresholds.

11. The anti-theft device (105) as claimed in claim 10, wherein the anti-theft device (105) being connected to a main power unit (110) of the vehicle (10), and the anti-theft device (105) being alternately powered by an auxiliary power unit (112), wherein upon disconnection between the anti-theft device (105) and the main power unit (110) in the vehicle lock condition owing to one or more variation in the vehicle (10), the anti-theft device (105) being alternately powered by the auxiliary power unit (112),the auxiliary power unit (112) being formed integrally with the anti-theft device (105).

12. The anti-theft device (105) as claimed in claim 10, wherein the alert unit (105) comprises one or more alert generating sub-units, the one or more alert generating sub-units configured to provide at least one of: an audio alert, a visual alert, and a communication including at least one of voice, call and text transmitted to a personal digital assistant of rider or owner of the vehicle (10) .

13. The anti-theft device (105) as claimed in claim 10, wherein the one or more variations of the vehicle (10) comprises at least one of: movement of the vehicle (10) along one or more vehicle axes ; change in orientation of a steering assembly of the vehicle(10); and movement of a center stand or a side stand of the vehicle (10).

14. The anti-theft device (105) as claimed in claim 10, wherein the external device (104) being selected from one of: a mechanical key, a key fob, a personal digital assistant of a user of the vehicle (10), the external device (104) being configured to communicatively couple with the control unit (102) to lock or unlock the vehicle (10), the key fob and the personal digital assistant being configured to transmit the user input upon acceptance of authentication and pairing request by the control unit (102) of the vehicle (10).

15. The anti-theft device (105) as claimed in claim 10, wherein the user input being indicative of at least one of the vehicle lock condition and a vehicle unlock condition, wherein the vehicle lock condition comprises at least one of obstruction of a steering assembly movement of the vehicle (10) and activation of brakes to restrain vehicle wheel movement of the vehicle (10) and the vehicle unlock condition comprises at least one of the steering assembly movement of the vehicle (10) and the wheel movement of the vehicle (10).