Claims:We Claim:
1. An unmanned aerial vehicle for spraying agricultural/non-agricultural substances on a required location, comprising:

a micro controller unit 126 configured to operate one or more stepper motors 110a and 110b with one or more rollers 108a and 108b on activating a first electronic switch 114, wherein the one or more stepper motors 110a and 110b configured to enable the one or more rollers 108a and 108b to rotate a rope 130 in an anticlockwise direction and enables one or more second internal arms 204a and 204b to slide down from one or more telescopic arms 112a and 112b to extract slowly by sliding an automatic height-adjustable telescopic boom bar 116 vertically down at a first position when the one or more stepper motors 110a and 110b are in a rotating mode;
the one or more stepper motors 110a and 110b configured to enable the one or more rollers 108a and 108b to rotate the rope 130 in the anticlockwise direction and enables one or more third internal arms 206a and 206b to slide down from the one or more second internal arms 204a and 204b to extract slowly by sliding the automatic height-adjustable telescopic boom bar 116 vertically down at a second position when the one or more stepper motors 110a and 110b are still in the rotating mode;
the one or more stepper motors 110a and 110b configured to enable the one or more rollers 108a and 108b to rotate the rope 130 in the anticlockwise direction and enables one or more fourth internal arms 208a and 208b to slide down from the one or more third internal arms 204a and 204b to extract slowly by sliding the automatic height-adjustable telescopic boom bar 116 vertically down at a third position when the one or more stepper motors 110a and 110b are in the rotating mode and thereby enabling the second electronic switch 114b to cut off the spraying operation;
the micro controller unit 126 configured to operate the one or more stepper motors 110a and 110b with the one or more rollers 108a and 108b on activating the second electronic switch 114b, wherein the one or more stepper motors 110a and 110b configured to enable the one or more rollers 108a and 108b to rotate the rope 130 in a clockwise direction and enables the one or more telescopic arms 112a and 112b to retract the automatic height-adjustable telescopic boom bar 116 slowly to original position after spraying; and
the automatic height-adjustable telescopic boom bar 116 configured to spray at least one of: the agricultural substances; and the non-agricultural substances via a tube 202 while flying over the required location, whereby the required location comprising at least one of: water bodies/land; paddy fields, fields; orchards; an agricultural land; and a farming land;

2. The unmanned aerial vehicle as claimed in claim 1, wherein the spraying of agricultural substances/non-agricultural substances comprising chemicals, pesticides, insecticide of forestry, herbicide and foliage dressing, dispensing seeds, fertilizers, pellets, fungicides, herbicides, plant growth regulators, defoliation agents, and so forth.

3. The unmanned aerial vehicle as claimed in claim 1, comprising one or more first clamps 104a, 104b, 104c and 104d positioned on a landing gear 128 and the one or more first clamps 104a, 104b, 104c and 104d are configured to hold one or more connecting pipes 106a in a required direction.

4. The unmanned aerial vehicle as claimed in claim 3, wherein the one or more telescopic arms 112a and 112b comprising one or more second clamps 104e and 104f configured to hold the one or more connecting pipes 106a, the one or more telescopic arms 112a and 112b, the one or more rollers 108a and 108b, and the one or more stepper motors 110a and 110b.

5. The unmanned aerial vehicle as claimed in claim 1, wherein the one or more stepper motors 110a and 110b with the rollers 108a and 108b are connected directly to the automatic height-adjustable telescopic boom bar 116 through the rope 130.

6. The unmanned aerial vehicle as claimed in claim 1, wherein the automatic height adjustable telescopic boom bar 116 is configured to hold one or more nozzles 118a, 118b, 118c, 118d and 118e with an angled edges and are positioned at an equidistant thereby facilitating widespread spraying.

7. The unmanned aerial vehicle as claimed in claim 1, wherein the tube 202 is configured to pass at least one of: the agricultural substances; the non-agricultural substances to the automatic height adjustable telescopic boom bar 116, whereby the tube 202 is twisted as per the height adjustment of the one or more telescopic arms 112a and 112b.

8. The unmanned aerial vehicle as claimed in claim 1, wherein the micro controller unit 126 comprising one or more position adjustment sensors 122a and 122b are configured to adjust the position of the one or more telescopic arms 112a and 112b automatically during tilting, and turning.

9. The unmanned aerial vehicle as claimed in claim 1, the automatic height-adjustable telescopic boom bar 116 comprising one or more flow sensors 120a, 120b, 120c, 120d, 120e positioned at the one or more nozzles 118a, 118b, 118c, 118d and 118e are configured to detect flow rate and clogging at the one or more nozzles118a, 118b, 118c, 118d and 118e.

10. The unmanned aerial vehicle as claimed in claim 1, wherein the at least one of: the first electronic switch 114a; and the second electronic switch 114b positioned on the one or more telescopic arms 112a and 112b configured to cut-off the rotation of the one or more rollers 108a and 108b at the required position and is controlled by the micro controller unit 126.

11. The unmanned aerial vehicle as claimed in claim 1, wherein the automatic height adjustable telescopic boom bar 116 is directly connected to the one or more telescopic arms 112a and 112b and the tube 202 for spraying the at least one of: the agricultural substances; and the non-agricultural substances.

12. The unmanned aerial vehicle as claimed in claim 1, wherein the one or more telescopic arms 112a and 112b, the one or more stepper motors 110 with the one or more rollers 108a and 108b are positioned on both sides of the unmanned aerial vehicle 102 at the same level which inline are connected to the automatic height adjustable telescopic boom bar 116 at the bottom.

13. The unmanned aerial vehicle as claimed in claim 1, comprising one or more height level sensors 124a, 124b, and 124c are configured to identify one or more obstacles and balances the unmanned aerial vehicle 102 automatically by adjusting the position of the telescopic boom bar 116.

14. The unmanned aerial vehicle as claimed in claim 1, wherein the first electronic switch 114a is configured to cut off at extraction of the one or more telescopic arms 112a and 112b.

15. The unmanned aerial vehicle as claimed in claim 1, wherein the second electronic switch 114b is configured to cut off at retraction of the telescopic arms 112a and 112b.
, Description:TECHNICAL FIELD
[001] The disclosed subject matter relates generally to unmanned aerial vehicle. More particularly, the present disclosure relates to an unmanned aerial vehicle for spraying agricultural substances /non-agricultural substances on required locations with an automatic telescopic height adjustable boom bar using a DC powered electronic motors.

BACKGROUND
[002] An unmanned aerial vehicle (UAV) is also abbreviated as a drone, an unmanned aircraft, unmanned plane, and so forth. The unmanned aerial vehicle is operated by a radio remote control device. The unmanned aerial vehicle has wide application and has better development prospect in the industries of police, city management, agriculture, geology, meteorology, electric power, emergency rescue and disaster relief, video shooting and so forth. The use of unmanned aerial vehicle to serve agriculture has rapidly evolved in recent years. Generally, the unmanned aerial vehicle is being used in the agricultural field for agriculture and forestry plant protection operations, such as spraying of chemicals, seeds, dusts, and so forth, and is therefore also called as agricultural drone.

[003] The conventional pesticide spraying unmanned aerial vehicles are easily subject to wind turbulence while spraying the pesticides. Further, the height of nozzles cannot be adjusted to spray the pesticides. The droplet of spraying pesticides is very less in the conventional pesticide spraying unmanned aerial vehicles. The scope of sprinkling is less, and the wastage of pesticides occurs due to inefficiency. Further, the existing unmanned aerial vehicles consists of a spray boom bar which is not adjustable and is also inconvenient to adjust spray area. The existing unmanned aerial vehicles fails to detect a flow rate as well as clogging at the nozzles. The existing unmanned aerial vehicles also fails to adjust the boom bar automatically by identifying obstacles in aerial. Hence, there is a need to develop the unmanned aerial vehicle to spray pesticides, chemicals or to dispense the seeds, fertilizers, pellets and so forth while flying over the water bodies/land with an automated telescopic height adjustable boom bar using DC powered electronic motors.

[004] In the light of the aforementioned discussion, there exists a need for a certain aerial vehicle with novel methodologies that would overcome the above-mentioned disadvantages.

SUMMARY
[005] The following presents a simplified summary of the disclosure in order to provide a basic understanding of the reader. This summary is not an extensive overview of the disclosure and it does not identify key/critical elements of the invention or delineate the scope of the invention. Its sole purpose is to present some concepts disclosed herein in a simplified form as a prelude to the more detailed description that is presented later.

[006] An objective of the present disclosure is directed towards an unmanned aerial vehicle for spraying agricultural/non-agricultural substances while flying over the water bodies/land with an automatic telescopic height adjustable boom bar using DC powered electronic motors.

[007] Another objective of the present disclosure is directed towards reducing wind turbulences while flying over a required location for spraying the agricultural/non-agricultural substances.

[008] Another objective of the present disclosure is directed towards reducing the distance between the unmanned aerial vehicle and the water bodies thereby eliminating the pulling effect from water and crashing the unmanned aerial vehicle into the water.

[009] Another objective of the present disclosure is directed towards facilitating a widespread spraying of the agricultural/non-agricultural substances with angled edge nozzles on the automatic telescopic height adjustable boom bar.

[0010] Another objective of the present disclosure is directed towards detecting the flow rate as well as the clogging at the nozzles using flow sensors.

[0011] Another objective of the present disclosure is directed towards identifying obstacles and balancing the unmanned aerial vehicle using height level sensor.

[0012] Another objective of the present disclosure is directed towards automatically adjusting the position of the telescopic boom bar using position adjustment sensors during tilting and turning of the unmanned aerial vehicle.

[0013] Another objective of the present disclosure is directed towards the unmanned aerial vehicle uses a failsafe technology while landing with the telescopic boom bar extraction and automatically retracts to its original shape.

[0014] According to an exemplary aspect, an unmanned aerial vehicle comprising a micro controller unit configured to operate the stepper motors with the rollers on activating the first electronic switch.

[0015] According to another exemplary aspect, the stepper motors configured to enable the rollers to rotate a rope in an anticlockwise direction and enables telescopic arms to extract slowly by sliding an automatic height-adjustable telescopic boom bar vertically down for a required position.

[0016] According to another exemplary aspect, the stepper motors with the rollers connected directly to the automatic height-adjustable telescopic boom bar through the rope.

[0017] According to another exemplary aspect, the micro controller unit configured to operate the stepper motors with the rollers on deactivating a second electronic switch.

[0018] According to another exemplary aspect, the stepper motors configured to enable the rollers to rotate the rope in a clockwise direction and enables the telescopic arms to retract the automatic height-adjustable telescopic boom bar slowly to original position after spraying.

[0019] According to another exemplary aspect, the automatic height-adjustable telescopic boom bar configured to spray agricultural substances/non-agricultural substances while flying over a required location.

[0020] According to another exemplary aspect, the automatic height adjustable telescopic boom bar configured to hold nozzles with an angled edges and are positioned at an equidistant thereby facilitating widespread spraying.

[0021] According to another exemplary aspect, the position adjustment sensors configured to adjust the position of the telescopic arms automatically during tilts, and turns.

[0022] According to another exemplary aspect, the flow sensors positioned at the nozzles configured to detect flow rate and clogging at the nozzles.

[0023] According to another exemplary aspect, the first clamps positioned on a landing gear and the first clamps configured to hold connecting pipes in a required direction.

[0024] According to another exemplary aspect, the second clamps configured to hold the one or more connecting pipes 106a, the one or more telescopic arms, the one or more rollers 1, and the one or more stepper motors.
BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In the following, numerous specific details are set forth to provide a thorough description of various embodiments. Certain embodiments may be practiced without these specific details or with some variations in detail. In some instances, certain features are described in less detail so as not to obscure other aspects. The level of detail associated with each of the elements or features should not be construed to qualify the novelty or importance of one feature over the others.

[0026] FIG. 1A, FIG. 1B are example diagrams depicting an unmanned aerial vehicle system for spraying agricultural substances/non-agricultural substances on a required location, in accordance with one or more exemplary embodiments.

[0027] FIG. 1C is an example diagram depicting the detailed view of the rope fixture, in accordance with one or more exemplary embodiments.

[0028] FIG. 2A is an example diagram depicting a first position height adjustment of the telescopic arms, in accordance with one or more exemplary embodiments.

[0029] FIG. 2B is another example diagram depicting a second position height adjustment of the telescopic arms, in accordance with one or more exemplary embodiments.

[0030] FIG. 2C is another example diagram depicting a third position height adjustment of the telescopic arms, in accordance with one or more exemplary embodiments.

[0031] FIG. 2D, FIG. 2E, FIG. 2F, and FIG. 2G are example diagrams depicting a left view, a top view, a bottom view and an isometric view of the unmanned aerial vehicle, in accordance with one or more exemplary embodiments.

DETAILED DESCRIPTION OF EXAMPLE EMBODIMENTS
[0032] It is to be understood that the present disclosure is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the drawings. The present disclosure is capable of other embodiments and of being practiced or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting.

[0033] The use of “including”, “comprising” or “having” and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. The terms “a” and “an” herein do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced item. Further, the use of terms “first”, “second”, and “third”, and the like, herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.

[0034] Referring to FIG. 1A, FIG. 1B are example diagrams 100a and 100b depicting an unmanned aerial vehicle system for spraying agricultural/non-agricultural substances on a required location, in accordance with one or more exemplary embodiments. The unmanned aerial vehicle system 100a and 100b includes an unmanned aerial vehicle 102, first clamps 104a, 104b, 104c and 104d, second clamps 104e and 104f, connecting pipes 106a, rollers 108a and 108b, stepper motors/DC powered electronic motor 110a and 110b, telescopic arms 112a and 112b, a first electronic switch 114a, a second electronic switch 114b, a telescopic boom bar 116, nozzles 118a, 118b, 118c, 118d and 118e, flow sensors 120a, 120b, 120c, 120d, 120e, position adjustment sensors 122a and 122b, height level sensors 124a, 124b, and 124c, a micro controller unit 126, and a landing gear 128.

[0035] The unmanned aerial vehicle 102 may be configured to spray agricultural/non-agricultural substances while flying over the required location with an automatic height-adjustable telescopic boom bar 116 using the stepper motors 110a and 110b. The required location may include, but not limited to, water bodies/land, paddy fields, fields, orchards, agricultural land, farming land, and so forth. The spraying of agricultural/non-agricultural substances may include, chemicals, pesticides, insecticide of forestry, herbicide and foliage dressing, dispensing seeds, fertilizers, pellets, fungicides, herbicides, plant growth regulators, defoliation agents, and so forth.

[0036] The stepper motors 110a and 110b may be controlled/operated by the micro controller unit 126. The micro controller unit 126 may include, but is not limited to, a microcontroller (for example ARM 7 or ARM 11), a raspberry pi, a microprocessor, a digital signal processor, a microcomputer, a field programmable gate array, a programmable logic device, a state machine or a logic circuitry.

[0037] The telescopic arms 112a and 112b, the stepper motors 110 with the rollers 108a and 108b may be positioned on both sides of the unmanned aerial vehicle 102 at the same level which inline are connected to the telescopic boom bar 116 at the bottom. The stepper motors 110a and 110b with the rollers 108a and 108b may be configured to rotate in an anticlockwise direction and enables the telescopic arms 112a and 112b to extract slowly by sliding the telescopic boom bar 116 vertically down for a required position. The required position of the telescopic arms 112a and 112b may include, but not limited to, a first position, a second position, a third position, and so forth. The stepper motors 110a and 110b with the rollers 108a and 108b may be configured to rotate in the clockwise direction and enables the telescopic arms 112a and 112b to retract slowly to the original position after spraying the agricultural substances/non-agricultural substances. The stepper motors 110a and 110b with the rollers 108a and 108b may be connected directly to the telescopic boom bar 116 through a rope 130 (as shown in Fig. 1C).

[0038] The first clamps 104a, 104b, 104c and 104d may be positioned on the landing gear 128 and the first clamps 104a, 104b, 104c and 104d may be configured to hold the connecting pipes 106a in a desired direction. The rollers 108a and 108b may be connected with the rope fixture 130. The second clamps 104e and 104f may be configured to hold the connecting pipes 106a, the telescopic arms 112a and 112b, the rollers 108a and 108b, and the stepper motors 110a and 110b.

[0039] The first electronic switch 114a may be configured to cut off at extraction. The second electronic switch 114b may be configured to cut off at retraction. The first electronic switch 114a and the second electronic switch 114b on the telescopic arms 112a and 112b may be configured to enable the cut-off the rotation of the rollers 108a and 108b as per the required height and is controlled by the micro controller unit 126. The telescopic boom bar 116 may be configured to hold the nozzles 118a, 118b, 118c, 118d and 118e with an angled edges and are positioned at an equidistant thereby facilitating widespread spraying. The telescopic boom bar 116 may be directly connected to the telescopic arms 112a and 112b and a tube (202, as shown in FIG. 2A) for spraying the agricultural/non-agricultural substances. The flow sensors 120a, 120b, 120c, 120d, 120e may be positioned at the nozzles 118a, 118b, 118c, 118d and 118e to detect the flow rate and the clogging at the nozzles118a, 118b, 118c, 118d and 118e. The position adjustment sensors 122a and 122b may be configured to adjust the position of the telescopic arms 112a and 112b automatically during tilts, and turnings. The height level sensors 124a, 124b, and 124c may be configured to identify the obstacles and balances the unmanned aerial vehicle 102 by automatically adjusting the height of the telescopic boom bar 116.

[0040] Referring to FIG. 1C is an example diagram 100c depicting the detailed view of the rope fixture, in accordance with one or more exemplary embodiments. The diagram 100c depicts the unmanned aerial vehicle 102, the rope 130, the rollers 108a and 108b, the stepper motors 110a and 110b, and the telescopic arms 112a and 112b. The unmanned aerial vehicle 102 may lift off from the ground and hover for spraying of the agricultural/non-agricultural substances. The stepper motors 110a and 110b may be configured to activate the rollers 108a and 108b to rotate in the anticlockwise direction and enables the rope 130 to slide down the telescopic arms 112a and 112b. The first electronic switch top 114a may be activated to release the stepper motors 110a and 110b.

[0041] Referring to FIG. 2A is an example diagram 200a depicting a first position height adjustment of the telescopic arms, in accordance with one or more exemplary embodiments. The diagram 200a depicts a tube 202, second internal arms 204a and 204b, the telescopic arms 112a and 112b, the telescopic boom bar 116, and the stepper motors 110a and 110b. The second internal arms 204a and 204b may be configured to slide down from the telescopic arms 112a and 112b when the stepper motors 110a and 110b are in a rotating mode. The tube 202 may be used for the passage of the agricultural/non-agricultural substances and the tube 202 may be twisted as per the height adjustment of the telescopic arms 112a and 112b.

[0042] Referring to FIG. 2B is another example diagram 200b depicting a second position height adjustment of the telescopic arms, in accordance with one or more exemplary embodiments. The diagram 200b depicts the tube 202, third internal arms 206a and 206b, the telescopic arms 112a and 112b, the telescopic boom bar 116, and the stepper motors 110a and 110b. The third internal arms 206a and 206b may be configured to slide down from the second internal arms 204a and 204b when the stepper motors 110a and 110b are still in the rotating mode.

[0043] Referring to FIG. 2C is another example diagram 200c depicting a third position height adjustment of the telescopic arms, in accordance with one or more exemplary embodiments. The diagram 200c depicts the tube 202, fourth internal arms 208a and 208b, the telescopic arms 112a and 112b, the telescopic boom bar 116, and the stepper motors 110a and 110b. The fourth internal arms 208a and 208b may be configured to slide down from the third internal arms 204a and 204b when the stepper motors 110a and 110b are still in the rotating mode and opens the second electronic switch for the lower cut off and ends the spraying and dispensing operation. The spraying and dispensing operation may be performed by the micro controller unit 126 based on the user inputs. Once the spraying is performed, the retraction operation may be performed in a clockwise direction and is controlled by the micro controller unit 126 before landing.

[0044] Referring to FIG. 2D, FIG. 2E, FIG. 2F, and FIG. 2G, are example diagrams 200d, 200e, 200f, and 200g depicting a left view, a top view, a bottom view and an isometric view of the unmanned aerial vehicle, in accordance with one or more exemplary embodiments. The diagram 200d depicts the left view of the unmanned aerial vehicle 102. The diagram 200e depicts the top view of the unmanned aerial vehicle 102. The diagram 200f depicts the bottom view of the unmanned aerial vehicle 102. The diagram 200g depicts the isometric view of the unmanned aerial vehicle 102. The diagrams 200d, 200e, 200f, and 200g includes the unmanned aerial vehicle 102, the rollers 108a and 108b, the stepper motors 110a and 110b, the telescopic arms 112a and 112b, the first electronic switch 114a, the second electronic switch 114b, the telescopic boom bar 116, the nozzles 118a, 118b, 118c, 118d and 118e, the flow sensors 120a, 120b, 120c, 120d, 120e, the position adjustment sensors 122a and 122b, the height level sensors 124a, 124b, and 124c, the micro controller unit 126, and the landing gear 128.

[0045] The unmanned aerial vehicle 102 includes a telescopic spraying feature which may be used to spray the chemicals or to dispense the seeds, fertilizers, pellets and so forth while flying over the water bodies/land with the automated telescopic height adjustable boom bar 116 using the stepper motors 110a and 110b. The stepper motors 110a and 110b may be of DC powered electronic motors.

[0046] The unmanned aerial vehicle 102 includes a pair of fixed multiple arms and the stepper motors 110a and 110b with the rollers 108a and 108b on both sides of the unmanned aerial vehicle 102 at the same level which inline are connected to the telescopic boom bar 116 at the bottom. On the activation the stepper motors 110a and 110b, the rollers 108a and 108b may rotate in anti-clockwise direction which are connected directly to the telescopic boom bar 116 via the rope 130 enables the telescopic arms 112a and 112b to extract slowly at the same time and make the telescopic boom bar 116 slide vertically down as per the prescribed height and therefore the spraying operation may be performed. After spraying the agricultural/non-agricultural substances, the rotation of the rope 130 may happen in the clockwise direction and enables the telescopic arms 112a and 112b to retract slowly to the original position. Two switches 114a and 114b on each telescopic arms 112a and 112b may be configured to enable the cut-off of the rotation as per the required height and is controlled by the micro controller unit 126.

[0047] The unmanned aerial vehicle 102 includes a rope pulling technology, and a failsafe technology when the unmanned aerial vehicle 102 lands with the telescopic arms 112a and 112b on extraction, the telescopic arms 112a and 112b may automatically retract to its original position. The unmanned aerial vehicle 102 includes the position adjustment sensors 122a and 122b on the telescopic boom bar 116. The position adjustment sensors 122a and 122b may be configured to adjust the position of the telescopic boom bar 116 of the unmanned aerial vehicle 102 while performing the tilting and turning. The unmanned aerial vehicle 102 includes the height level sensors 124a, 124b, and 124c may be configured to identify the obstacles and balances the unmanned aerial vehicle 102 automatically based on the height of the obstacles identified. The unmanned aerial vehicle 102 includes the flow sensors 120a, 120b, 120c, 120d, 120e may be positioned on the telescopic boom bar 116 at every nozzle 118a, 118b, 118c, 118d, and 118e. The flow sensors 120a, 120b, 120c, 120d, 120e may be configured to detect the flow rate as well as the clogging at the nozzles 118a, 118b, 118c, 118d, and 118e.

[0048] The unmanned aerial vehicle 102 may be configured to reduce the wind turbulence on the spraying. The unmanned aerial vehicle 102 may be configured to reduce the distance between the unmanned aerial vehicle 102 and the water surface thereby eliminating the pulling effect from water and crashing the unmanned aerial vehicle 102 into the water. The unmanned aerial vehicle 102 may include the five nozzles 118a, 118b, 118c, 118d, and 118e on the telescopic boom bar 116 with angled edges. The five nozzles 118a, 118b, 118c, 118d, and 118e on the telescopic boom bar 116 with angled edges may be configured to enable a wider spread while spraying.

[0049] In an exemplary embodiment, an unmanned aerial vehicle for spraying agricultural/non-agricultural substances on a required location includes the micro controller unit 126 is configured to operate the stepper motors 110a and 110b with the rollers 108a and 108b on activating the first electronic switch 114. The stepper motors 110a and 110b are configured to enable the rollers 108a and 108b to rotate the rope 130 in the anticlockwise direction and enables the second internal arms 204a and 204b to slide down from the telescopic arms 112a and 112b to extract slowly by sliding the automatic height-adjustable telescopic boom bar 116 vertically down at the first position when the stepper motors 110a and 110b are in the rotating mode.

[0050] In another exemplary embodiment, the stepper motors 110a and 110b are configured to enable the rollers 108a and 108b to rotate the rope 130 in the anticlockwise direction and enables the third internal arms 206a and 206b to slide down from the second internal arms 204a and 204b to extract slowly by sliding the automatic height-adjustable telescopic boom bar 116 vertically down at the second position when the stepper motors 110a and 110b are still in the rotating mode.

[0051] In another exemplary embodiment, the stepper motors 110a and 110b are configured to enable the rollers 108a and 108b to rotate the rope 130 in the anticlockwise direction and enables the fourth internal arms 208a and 208b to slide down from the third internal arms 204a and 204b to extract slowly by sliding the automatic height-adjustable telescopic boom bar 116 vertically down at the third position when the stepper motors 110a and 110b are in the rotating mode and thereby enabling the second electronic switch 114b to cut off the spraying operation.

[0052] In another exemplary embodiment, the micro controller unit 126 are configured to operate the stepper motors 110a and 110b with the rollers 108a and 108b on activating the second electronic switch 114b, the stepper motors 110a and 110b are configured to enable the rollers 108a and 108b to rotate the rope 130 in the clockwise direction and enables the telescopic arms 112a and 112b to retract the automatic height-adjustable telescopic boom bar 116 slowly to original position after spraying.

[0053] In another exemplary embodiment, the automatic height-adjustable telescopic boom bar 116 configured to spray the agricultural substances/the non-agricultural substances while flying over the required location, the required location includes, water bodies/land; paddy fields, fields; orchards; an agricultural land; and a farming land.

[0054] In another exemplary embodiment, the spraying of agricultural substances/non-agricultural substances comprising chemicals, pesticides, insecticide of forestry, herbicide and foliage dressing, dispensing seeds, fertilizers, pellets, fungicides, herbicides, plant growth regulators, defoliation agents, and so forth. The telescopic arms 112a and 112b, the stepper motors 110 with the rollers 108a and 108b are positioned on both sides of the unmanned aerial vehicle 102 at the same level which inline are connected to the automatic height adjustable telescopic boom bar 116 at the bottom.

[0055] In an exemplary embodiment, the stepper motors 110a and 110b with the rollers 108a and 108b are connected directly to the automatic height-adjustable telescopic boom bar 116 through the rope 130. The automatic height adjustable telescopic boom bar 116 is configured to hold nozzles 118a, 118b, 118c, 118d and 118e with an angled edges and are positioned at an equidistant thereby facilitating widespread spraying. A tube 202 is configured to pass the agricultural substances/non-agricultural substances to the automatic height adjustable telescopic boom bar 116, the tube 202 is twisted as per the height adjustment of the telescopic arms 112a and 112b.

[0056] In another exemplary embodiment, the position adjustment sensors 122a and 122b are configured to adjust the required position of the telescopic arms 112a and 112b automatically during tilts, and turns. The flow sensors 120a, 120b, 120c, 120d, 120e positioned at the nozzles 118a, 118b, 118c, 118d and 118e are configured to detect flow rate and clogging at the nozzles118a, 118b, 118c, 118d and 118e.

[0057] In another exemplary embodiment, the first clamps 104a, 104b, 104c and 104d positioned on a landing gear 128 and the first clamps 104a, 104b, 104c and 104d are configured to hold connecting pipes 106a in a required direction. The second clamps 104e and 104f are configured to hold the connecting pipes 106a, the telescopic arms 112a and 112b, the rollers 108a and 108b, and the stepper motors 110a and 110b.

[0058] In another exemplary embodiment, the first electronic switch 114a, and the second electronic switch 114b positioned on the telescopic arms 112a and 112b configured to cut-off the rotation of the rollers 108a and 108b at the required position and is controlled by the micro controller unit 126. The automatic height adjustable telescopic boom bar 116 is directly connected to the telescopic arms 112a and 112b and the tube 202 for spraying the agricultural substances; and the non-agricultural substances. The height level sensors 124a, 124b, and 124c are configured to identify obstacles and balances the unmanned aerial vehicle 102 automatically by adjusting the required position of the telescopic boom bar 116. The first electronic switch 114a is configured to cut off at extraction of the telescopic arms 112a and 112b. The second electronic switch 114b is configured to cut off at retraction of the telescopic arms 112a and 112b.

[0059] Reference throughout this specification to “one embodiment”, “an embodiment”, or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. Thus, appearances of the phrases “in one embodiment”, “in an embodiment” and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment.

[0060] Although the present disclosure has been described in terms of certain preferred embodiments and illustrations thereof, other embodiments and modifications to preferred embodiments may be possible that are within the principles of the invention. The above descriptions and figures are therefore to be regarded as illustrative and not restrictive.

[0061] Thus the scope of the present disclosure is defined by the appended claims and includes both combinations and sub-combinations of the various features described hereinabove as well as variations and modifications thereof, which would occur to persons skilled in the art upon reading the foregoing description.