Easily-positioned compression resistance detection device for small unmanned aerial vehicle production

Abstract

The utility model provides an easy-to-position compression resistance detection device for small unmanned aerial vehicle production, and relates to the technical field of unmanned aerial vehicle production equipment. Comprising a supporting table, two fixing frames are installed at the top of the supporting table, the supporting table, the fixing frames, a driving lifting mechanism and a supporting plate are arranged, compression resistance detection equipment is driven to move downwards step by step, and the driving lifting mechanism stops running until the compression resistance detection equipment is close to an unmanned aerial vehicle to-be-detected component placed on the surface of a placement disc; two movable limiting shifting blocks are shifted to move towards the middle until the unmanned aerial vehicle to-be-detected component is matched for limiting, a lifting mechanism is driven to continue to operate until the surface of the unmanned aerial vehicle to-be-detected component is extruded through the compression resistance detection equipment, pressure data of each extrusion is recorded through a pressure sensor, subsequent comparison is facilitated, and the detection accuracy is improved. And when the placing table is stressed, buffering protection treatment is performed through a bottom fixing seat, the service life of the equipment is prolonged, and moving rollers are arranged on the outer side of a fixing frame to cooperate with a moving sliding plate for free lifting treatment.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicle (UAV) production equipment, and in particular to an easy-to-position compression resistance detection device for the production of small-sized UAVs. Background Art

[0002] A small drone (often called a micro drone or multirotor drone) is a small, usually electrically powered drone used in a wide variety of applications.

[0003] During production, each raw material needs to be tested for compression resistance, usually with the aid of specialized equipment.

[0004] In actual work, the pressure resistance testing equipment in the existing technology still has the following problems when used: since no protective equipment is set during pressure resistance testing, each device will be damaged to varying degrees after long-term testing and needs to be replaced, which increases the cost of installation and use; no auxiliary positioning is performed during pressure resistance testing, which causes the drone components to be tested to easily shift in position, affecting the final test results and causing many inconveniences.

[0005] Therefore, the utility model provides an easy-to-position compression resistance detection device for small UAV production. Utility Model Content

[0006] The purpose of the utility model is to solve the shortcomings of the prior art and provide an easy-to-position compression resistance detection device for small UAV production.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions: a small-sized UAV production pressure detection device which is easy to locate, comprising a support platform,

[0008] Two fixing brackets are installed on the top of the support platform;

[0009] Four transmission chains are installed between the two fixing frames, mounting columns are installed on the outer sides of the four transmission chains, and movable slides are sleeved on the outer sides of the four mounting columns;

[0010] The bottom of the movable slide is fixedly connected to a pressure resistance detection device, the bottom of the pressure resistance detection device is slidably connected to symmetrically distributed movable limit blocks, and the bottom of the pressure resistance detection device is fixedly connected to equidistantly distributed pressure sensors;

[0011] A placement platform is installed below the compression testing device, and the placement platform is located above the support platform. Two support plates are installed on the top of the placement platform. The two support plates are located below the compression testing device. A rotating seat is installed between the two support plates. A second drive motor is fixedly connected to the interior of the rotating seat, and an output end of the second drive motor is fixedly connected to a placement disk.

[0012] A driving lifting mechanism used in conjunction with a transmission chain is installed inside the support platform.

[0013] The transmission gears are connected with the gear train of the said cam and the gears are connected with the gear train of the said cam, and the gears are connected with the gear train of the said cam and the gears are connected with the gear train of the said cam. The two gears are connected with each other through the third limit seat, and the two gears are connected with each other through the third limit seat, so that the first gear and the second gear are connected with each other through the third limit seat, and the two gears are connected with each other through the third limit seat.

[0014] The technical effect of adopting the above-mentioned further scheme is: the first gear rotates inside the first limit seat, driving the second gear above it to rotate, so that the first rotating shaft rotates within the two second limit seats, and the first rotating shafts at both ends of the second limit seat respectively drive the corresponding second bevel gears to rotate, driving the second rotating shafts inside the two third limit seats to rotate within the limit, and finally making the sprocket inside the transmission chain rotate accordingly, driving the transmission chain to transmit normally, thereby achieving the effect of adjusting the height of the movable skateboard connected to the transmission chain.

[0015] As a preferred embodiment, a first limiting sleeve is provided inside the fixed frame and on the outside of the transmission chain, and a rotating wheel of the same structure is installed inside the transmission chain and above the sprocket, and the axis of the rotating wheel is fixedly connected with a first limiting shaft that passes through both sides of the first limiting sleeve, and the rotating wheel and the transmission chain are limited and installed by the first limiting sleeve and the first limiting shaft to ensure subsequent normal lifting and lowering. Second limiting sleeves are installed around the top of the moving slide, and the interiors of the four second limiting sleeves are installed with moving rollers used in conjunction with the fixed frame. The interiors of the four second limiting sleeves are connected to the moving slide by tightening screws, and the second limiting sleeve and the moving slide are limited and installed by tightening screws. When the moving slide moves up and down, the moving rollers will roll on the surface of the fixed frame to perform buffering and limit, so as to cooperate with normal reset.

[0016] The technical effect of adopting the above further scheme is: the second limit sleeve and the movable slide are installed by tightening the screws. When the movable slide moves up and down, the movable roller will roll on the surface of the fixed frame to perform buffering and limiting, and cooperate with normal reset.

[0017] As a preferred embodiment, the interiors of the two support plates are threadedly connected with symmetrically distributed positioning bolts, and the bottom of the pressure resistance detection device is provided with a limit guide rail for cooperating with the movable limit block, and the outer side of the pressure resistance detection device is installed with symmetrically distributed limit pins for cooperating with the movable limit block, and equidistantly distributed fixed seats are installed between the support platform and the placement platform. The material of the fixed seat is a sponge pad, and when the placement platform is subjected to force, the fixed seat made of the sponge pad has a buffering and protective effect. The limit pin is used to limit the installation of the movable limit block after the spacing adjustment is completed, and the positioning bolt is used to reinforce the installation of the support plate and the movable slide, which is convenient for quick disassembly and assembly during maintenance. A control panel is fixedly connected to the outer side of the support platform, and the first drive motor, the second drive motor, the pressure resistance detection device and the pressure sensor are all electrically connected to the control panel. The control panel is used to control the operation of the first drive motor, the second drive motor, the pressure resistance detection device and the pressure sensor, thereby realizing unified management of power equipment.

[0018] The technical effect of adopting the above further solution is: the control panel is used to control the operation of the first drive motor, the second drive motor, the pressure resistance detection equipment and the pressure sensor, thereby realizing unified management of the power equipment.

[0019] Compared with the prior art, the advantages and positive effects of the present invention are:

[0020] By setting a support table, a fixed frame, a driving lifting mechanism and a support plate, when in use, the interior of the four second limit sleeves are connected to the mobile slide through a tightening screw, and the second limit sleeve and the mobile slide are limited and installed by the tightening screw. When the mobile slide moves up and down, the mobile roller will roll on the surface of the fixed frame to perform buffering and limiting, and cooperate with normal reset. The material of the fixed seat is a sponge pad. When the placement table is subjected to force, the fixed seat made of the sponge pad plays a buffering and protective effect. The limit pin is used to limit the installation of the mobile limit block after the spacing adjustment is completed. The positioning bolt is used to reinforce the installation of the support plate and the mobile slide, which is convenient for quick disassembly and assembly during maintenance. By setting a driving lifting mechanism, the four The transmission chain drives the pressure test equipment to move gradually downward with the cooperation of the mobile slide until it is close to the drone component to be tested placed on the surface of the placement plate, and the driving lifting mechanism stops running. By toggling the two movable limit blocks, it moves to the middle until it is limited by the drone component to be tested. The movable limit blocks are positioned and installed by the limit pins, and the driving lifting mechanism continues to operate until the surface of the drone component to be tested is squeezed by the pressure test equipment. The pressure data of each squeezing is recorded by the pressure sensor to facilitate subsequent comparison. When the placement table is under force, the bottom fixed seat is used for buffering and protection, which extends the service life of the equipment. A movable roller is provided on the outside of the fixed frame to cooperate with the mobile slide for free lifting and lowering. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a front view of the overall structure of an easy-to-position compression testing device for small UAV production provided by the utility model;

[0022] Figure 2 This is a side view of the overall structure of an easy-to-locate compression testing device for small UAV production provided by the utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of the support platform of an easy-to-position compression testing device for small UAV production provided by the utility model;

[0024] Figure 4 This is an enlarged schematic diagram of the driving and lifting mechanism of an easy-to-position small UAV production pressure detection device provided by the utility model;

[0025] Figure 5The utility model provides an easy-to-position small UAV production pressure detection device with an attachment Figure 1 A schematic diagram of the structure at point A in the figure.

[0026] Legend:

[0027] 1. Support table; 11. Control panel;

[0028] 2. Fixed frame; 21. Placement table; 22. Fixed seat; 23. Moving slide; 24. First limit sleeve; 25. First limit shaft; 26. Second limit sleeve; 27. Moving roller; 28. Mounting column; 29. Transmission chain;

[0029] 3. Driving lifting mechanism; 31. First driving motor; 32. First limiting seat; 33. Support seat; 34. First rotating shaft; 35. First bevel gear; 36. Second bevel gear; 37. Second rotating shaft; 38. Sprocket; 39. Output shaft; 391. First gear; 392. Second gear; 393. Second limiting seat; 394. Third limiting seat;

[0030] 4. Support plate; 41. Rotating seat; 42. Second drive motor; 43. Placement plate; 44. Positioning bolt; 45. Compression testing equipment; 46. Movable limit block; 47. Limit latch; 48. Pressure sensor. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] like Figure 1-Figure 5As shown, this embodiment provides a technical solution: a pressure-resistant testing device for the production of small unmanned aerial vehicles that is easy to locate, comprising a support platform 1, with two fixing frames 2 installed on the top of the support platform 1; four transmission chains 29 are installed between the two fixing frames 2, and mounting columns 28 are installed on the outer sides of the four transmission chains 29, and a movable slide 23 is sleeved on the outer sides of the four mounting columns 28; the bottom of the movable slide 23 is fixedly connected to a pressure-resistant testing device 45, and the bottom of the pressure-resistant testing device 45 is slidably connected to symmetrically distributed movable limit blocks 46, and the bottom of the pressure-resistant testing device 45 is fixedly connected to equidistantly distributed pressure sensors 48; a placing platform 21 is installed below the pressure-resistant testing device 45, and the placing platform 21 is located above the support platform 1, and two support plates 4 are installed on the top of the placing platform 21, and the two support plates 4 are located below the pressure-resistant testing device 45, and a rotating seat 41 is installed between the two support plates 4, and the interior of the rotating seat 41 is fixedly connected to a second drive motor 42, and the output end of the second drive motor 42 is fixedly connected The support platform 1 is fixedly connected with a placement plate 43; the interior of the support platform 1 is equipped with a driving lifting mechanism 3 for use with a transmission chain 29. By setting up a driving lifting mechanism 3, the four transmission chains 29 are driven to transmit, thereby, with the cooperation of the mobile slide 23, the pressure detection equipment 45 is driven to move gradually downward until it is close to the drone component to be detected placed on the surface of the placement plate 43. The driving lifting mechanism 3 stops running, and moves toward the middle by toggling the two movable limit blocks 46 until it is limited to the drone component to be detected. The movable limit blocks 46 are positioned and installed by the limit pins 47, and the driving lifting mechanism 3 continues to operate until the surface of the drone component to be detected is squeezed by the pressure detection equipment 45, and the pressure data of each squeezing is recorded by the pressure sensor 48 for subsequent comparison. When the placement platform 21 is subjected to force, the fixed seat 22 at the bottom is used for buffering and protection, thereby extending the service life of the equipment. A movable roller 27 is provided on the outside of the fixed frame 2 to cooperate with the movable slide 23 for free lifting.

[0033] A step further, such as Figure 1-Figure 5As shown: the driving lifting mechanism 3 includes a first driving motor 31 and a first limiting seat 32. The interior of the support platform 1 is fixedly connected to two supporting seats 33. The first driving motor 31 is installed between the two supporting seats 33. The output end of the first driving motor 31 is fixedly connected to the output shaft 39. One side of the first driving motor 31 is fixedly connected to the first limiting seat 32. The interior of the first limiting seat 32 is rotatably connected to the first gear 391. The upper part of the first gear 391 is rotatably connected to the second gear 392. The second gear 392 is meshed with the first gear 391, and the output One end of the output shaft 39 extends to the inside of the first limiting seat 32 and is fixedly connected to the first gear 391. The axis of the second gear 392 is fixedly connected to the first rotating shaft 34. Both ends of the first rotating shaft 34 are fixedly connected to the first bevel gear 35. The first bevel gear 35 is located above the support seat 33. Two symmetrically distributed third limiting seats 394 are installed on the top of the two support seats 33. The interiors of the two third limiting seats 394 are rotatably connected to the second rotating shaft 37. The outer sides of the two second rotating shafts 37 are fixedly connected to the second bevel gear 36. The second bevel gear 35 is located above the support seat 33. The gears 36 are meshed with the corresponding first bevel gears 35, and both ends of the second rotating shaft 37 extend to the inside of the transmission chain 29 and are fixedly connected to the sprocket 38. The sprocket 38 is transmission-connected to the transmission chain 29. The top of the two support seats 33 and one side of the third limit seat 394 are both installed with a second limit seat 393. The first rotating shaft 34 passes through the third limit seat 394 and is limitedly supported by the third limit seat 394. The output shaft 39 is driven to rotate by the output end of the first drive motor 31, so that the first The gear 391 rotates inside the first limit seat 32, driving the second gear 392 above to rotate, so that the first rotating shaft 34 is limited and rotated inside the two second limit seats 393, and the first rotating shaft 34 at both ends of the second limit seat 393 drives the corresponding second bevel gear 36 to rotate, driving the second rotating shaft 37 inside the two third limit seats 394 to limit and rotate, and finally causing the sprocket 38 inside the transmission chain 29 to rotate accordingly, driving the transmission chain 29 to transmit normally, thereby achieving the effect of adjusting the height of the movable slide 23 connected to the transmission chain 29.

[0034] The above solutions still have the problem of not providing buffer protection during the pressure test of the equipment, such as Figure 1-Figure 5As shown: in this scheme, a first limiting sleeve 24 is sleeved inside the fixed frame 2 and on the outside of the transmission chain 29, and a rotating wheel of the same structure is installed inside the transmission chain 29 and above the sprocket 38, and the axis of the rotating wheel is fixedly connected to a first limiting shaft 25 that passes through both sides of the first limiting sleeve 24. The rotating wheel and the transmission chain 29 are limited and installed by the first limiting sleeve 24 and the first limiting shaft 25 to ensure subsequent normal lifting and lowering. Second limiting sleeves 26 are installed all around the top of the moving slide 23, and the insides of the four second limiting sleeves 26 are all installed with moving rollers 27 used in conjunction with the fixed frame 2. The insides of the four second limiting sleeves 26 are connected to the moving slide 23 by tightening screws, and the second limiting sleeves 26 and the moving slide 23 are limited and installed by tightening screws. When the moving slide 23 moves up and down, it will be buffered and limited by the moving rollers 27 rolling on the surface of the fixed frame 2 to cooperate with normal reset.

[0035] The above solutions still have the problem of inconvenience in quickly disassembling and assembling the equipment, such as Figure 1-Figure 3 As shown, in this scheme, the interiors of the two support plates 4 are both threadedly connected with symmetrically distributed positioning bolts 44, the bottom of the pressure resistance detection device 45 is provided with a limiting guide rail for cooperating with the movable limiting block 46, and the outer side of the pressure resistance detection device 45 is installed with symmetrically distributed limiting pins 47 for cooperating with the movable limiting block 46, and equidistantly distributed fixing seats 22 are installed between the support platform 1 and the placement platform 21. The material of the fixing seat 22 is a sponge pad. When the placement platform 21 is subjected to force, the fixing seat 22 made of the sponge pad material has a buffering and protective effect. The limiting pin 47 is used to limit the installation of the movable limiting block 46 after the spacing adjustment is completed, and the positioning bolt 44 is used to reinforce the installation of the support plate 4 and the movable slide 23, which is convenient for quick disassembly and assembly during maintenance.

[0036] The above solutions still have the problem of inconvenient unified management of power equipment, such as Figure 1-Figure 4 As shown, in this solution, a control panel 11 is fixedly connected to the outside of the support platform 1, and the first drive motor 31, the second drive motor 42, the pressure detection device 45 and the pressure sensor 48 are all electrically connected to the control panel 11. The control panel 11 is used to control the operation of the first drive motor 31, the second drive motor 42, the pressure detection device 45 and the pressure sensor 48, thereby realizing unified management of electrical equipment.

[0037] Working principle:

[0038] like Figure 1-5 As shown:

[0039] When in use, the control panel 11 is opened, the first driving motor 31 is operated, and the output end of the first driving motor 31 drives the output shaft 39 to rotate, so that the first gear 391 rotates inside the first limiting seat 32, driving the second gear 392 above to rotate, so that the first rotating shaft 34 is limited and rotated inside the two second limiting seats 393, and the first rotating shafts 34 at both ends of the second limiting seats 393 respectively drive the corresponding second bevel gears 36 to rotate, driving the second rotating shafts 37 inside the two third limiting seats 394 to limit and rotate, and finally the sprocket 38 inside the transmission chain 29 rotates accordingly, driving the transmission chain 29 to transmit normally, thereby achieving the effect of adjusting the height of the movable slide 23 connected to the transmission chain 29;

[0040] The first limiting sleeve 24 and the first limiting shaft 25 are used to limit the installation of the rotating wheel and the transmission chain 29 to ensure normal subsequent lifting;

[0041] The interiors of the four second limiting clamps 26 are connected to the movable slide 23 via set screws, and the second limiting clamps 26 and the movable slide 23 are fixed by the set screws;

[0042] When the movable slide 23 moves up and down, the movable roller 27 rolls on the surface of the fixed frame 2 to perform buffering and limiting, and cooperates with normal reset. The material of the fixed seat 22 is a sponge pad. When the placement table 21 is subjected to force, the fixed seat 22 made of the sponge pad material plays a buffering and protective effect;

[0043] The limit pin 47 is used to limit the installation of the movable limit block 46 after the spacing adjustment is completed;

[0044] The positioning bolts 44 are used to reinforce the support plate 4 and the movable slide plate 23, so as to facilitate quick disassembly and assembly during maintenance;

[0045] The control panel 11 is used to control the operation of the first drive motor 31, the second drive motor 42, the pressure detection device 45 and the pressure sensor 48, thereby achieving unified management of the power equipment;

[0046] By providing a driving lifting mechanism 3, four transmission chains 29 are driven to transmit, so that with the cooperation of the mobile slide 23, the pressure resistance detection equipment 45 is driven to move gradually downward until it is close to the drone component to be detected placed on the surface of the placement plate 43, and the driving lifting mechanism 3 stops running, and moves toward the middle by toggling the two movable limit blocks 46 until it is limited to the drone component to be detected, and the movable limit blocks 46 are positioned and installed by the limit pins 47, and the driving lifting mechanism 3 continues to operate until the surface of the drone component to be detected is squeezed by the pressure resistance detection equipment 45, and the pressure data of each squeezing is recorded by the pressure sensor 48 to facilitate subsequent comparison. When the placement table 21 is subjected to force, the fixed seat 22 at the bottom is used for buffering and protection, thereby extending the service life of the equipment. A movable roller 27 is provided on the outside of the fixed frame 2 to cooperate with the free lifting and lowering of the movable slide 23.

[0047] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. An easy-to-position compressive testing device for small UAV production, comprising a support platform (1), characterized in that: Two fixing frames (2) are installed on the top of the support platform (1); Four transmission chains (29) are installed between the two fixing frames (2), mounting columns (28) are installed on the outside of the four transmission chains (29), and movable slides (23) are sleeved on the outside of the four mounting columns (28); The bottom of the movable slide plate (23) is fixedly connected to a pressure-resistant detection device (45), the bottom of the pressure-resistant detection device (45) is slidably connected to symmetrically distributed movable limit blocks (46), and the bottom of the pressure-resistant detection device (45) is fixedly connected to equidistantly distributed pressure sensors (48); A placement platform (21) is installed below the compression testing device (45), two support plates (4) are installed on the top of the placement platform (21), a rotating seat (41) is installed between the two support plates (4), a second drive motor (42) is fixedly connected to the interior of the rotating seat (41), and a placement disk (43) is fixedly connected to the output end of the second drive motor (42).

2. The easily positionable small UAV production pressure resistance detection device according to claim 1 is characterized in that: The support platform (1) is internally installed with a driving lifting mechanism (3) used in conjunction with a transmission chain (29), and the driving lifting mechanism (3) includes a first driving motor (31) and a first limiting seat (32). The support platform (1) is internally fixedly connected to two supporting seats (33), and the first driving motor (31) is installed between the two supporting seats (33). The output end of the first driving motor (31) is fixedly connected to an output shaft (39), and one side of the first driving motor (31) is fixedly connected to the first limiting seat (32). The first limiting seat (32) is internally rotatably connected to a first gear (391), and the upper portion of the first gear (391) is rotatably connected to a second gear (392), and the second gear (392) is meshed with the first gear (391). One end of the output shaft (39) extends to the inside of the first limiting seat (32). The second gear (392) is fixedly connected to the first rotating shaft (34) at its axis, and both ends of the first rotating shaft (34) are fixedly connected to the first bevel gear (35). The first bevel gear (35) is located above the support seat (33). Two symmetrically distributed third limit seats (394) are installed on the top of the two support seats (33). The interiors of the two third limit seats (394) are rotatably connected to the second rotating shaft (37). The outer sides of the two second rotating shafts (37) are fixedly connected to the second bevel gear (36). The second bevel gears (36) are meshed with the corresponding first bevel gear (35). Both ends of the second rotating shaft (37) extend into the interior of the transmission chain (29) and are fixedly connected to the sprocket (38). The sprocket (38) is transmission-connected to the transmission chain (29).

3. The easily positionable small UAV production pressure resistance detection device according to claim 2, characterized in that: A second limiting seat (393) is installed on the top of the two support seats (33) and on one side of the third limiting seat (394), and the first rotating shaft (34) passes through the third limiting seat (394) and is limitedly supported by the third limiting seat (394).

4. The easily positionable pressure-resistant testing device for small-sized UAV production according to claim 3, characterized in that: A first limiting sleeve (24) is sleeved inside the fixed frame (2) and located outside the transmission chain (29); a rotating wheel with the same structure is installed inside the transmission chain (29) and located above the sprocket (38); the axis of the rotating wheel is fixedly connected to a first limiting shaft (25) that passes through both sides of the first limiting sleeve (24).

5. The easily positionable small UAV production pressure resistance detection device according to claim 4, characterized in that: Second limiting sleeves (26) are installed around the top of the movable slide (23), and the interiors of the four second limiting sleeves (26) are installed with movable rollers (27) used in conjunction with the fixing frame (2), and the interiors of the four second limiting sleeves (26) are connected to the movable slide (23) through set screws.

6. The easily positionable small UAV production pressure resistance detection device according to claim 1, characterized in that: The interiors of the two support plates (4) are both threadedly connected with symmetrically distributed positioning bolts (44); the bottom of the pressure resistance detection device (45) is provided with a limit guide rail used in conjunction with the movable limit block (46); the outer side of the pressure resistance detection device (45) is installed with symmetrically distributed limit pins (47) used in conjunction with the movable limit block (46); and fixed seats (22) are installed between the support platform (1) and the placement platform (21) at equal intervals.

7. The easily positionable small UAV production pressure resistance detection device according to claim 3, characterized in that: A control panel (11) is fixedly connected to the outer side of the support platform (1), and the first drive motor (31), the second drive motor (42), the pressure resistance detection device (45) and the pressure sensor (48) are all electrically connected to the control panel (11).

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