Automatic calibration method, structure and driving system for projector

Abstract

The present invention discloses an automatic calibration method, structure and driving system for a projector, and relates to the field of projector calibration. The method comprises a supporting foot, the top of the supporting foot is fixedly connected with a telescopic rod, the top of the telescopic rod is fixedly connected with a circular ring, the outer surface of the circular ring is slidably connected with a projection unit, the bottom of the circular ring is evenly provided with slots, the outer surface of the projection unit is fixedly connected with a ceiling unit, the ceiling unit can be disassembled, and the height of the overall structure can be adjusted by the telescopic rod. After that, the projection unit will autonomously calibrate horizontally and detect the clarity of the projected image by image sensing. When the overall structure is not allowed to be placed on the ground, the structure can be fixed on the wall by the ceiling unit, calibrated and projected.

Description

Technical Field

[0001] The present invention relates to the technical field of projector calibration, and in particular to an automatic calibration method, structure and driving system for a projector. Background Art

[0002] A projector is a modern electronic display device that can project images or video content onto a flat surface such as a screen or a wall. Its interior is mainly composed of a light source system, an optical projection system, and a circuit control system. The light source system provides sufficient brightness for projection and can be divided into various types such as traditional bulb light sources and LED light sources. The optical projection system includes components such as lenses, which are responsible for processing image or video signals into light and accurately projecting them. The size and clarity of the projected image can be changed by adjusting the lens focal length and angle. The circuit control system coordinates the operation of the entire projector, such as receiving input signals and controlling the brightness of the light source. Projectors are widely used in conference rooms, classrooms, home theaters, and other places, providing people with convenient large-screen display solutions and greatly enriching the way of visual presentation.

[0003] Before using the projector, if the ground where the projector is placed is uneven, the projected image will be tilted, resulting in poor viewing experience. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention solves the technical problems thereof by adopting the following technical solutions: the automatic calibration structure for a projector of the present invention comprises a supporting foot, the top of the supporting foot is fixedly connected to a telescopic rod, the top of the telescopic rod is fixedly connected to a ring, the outer surface of the ring is slidably connected to a projection unit, the bottom of the ring is evenly provided with slots, the outer surface of the projection unit is fixedly connected to a ceiling unit, and the ceiling unit can be detached;

[0005] The projection unit comprises a clamping plate, a support rod 1 is fixedly connected to the outer surface of the clamping plate, a projector is fixedly connected to one end of the support rod 1 away from the clamping plate, a sleeve column is fixedly connected to the outer surface of the projector, a projection head is fixedly connected to one end of the projector away from the sleeve column, an image sensor unit is fixedly connected to the top of the projector, a stabilizing unit is fixedly connected to the bottom of the projector, and a gravity calibration unit is fixedly connected to one end of the projector close to the stabilizing unit;

[0006] The gravity calibration unit comprises a placement plate, the outer surface of the placement plate is fixedly connected to a servo motor 1, the output end of the servo motor 1 is fixedly connected to a winding column, the outer surface of the winding column is sleeved with a steel wire rope, the bottom of the steel wire rope is fixedly connected to a weight ball, the two sides of the placement plate are fixedly connected to support rods 2, the bottom of the support rods 2 is fixedly connected to a cylindrical sleeve, the inner wall of the cylindrical sleeve is slidably connected to the outer surface of the steel wire rope

[0007] Preferably, the inner wall of the clamping plate is slidably connected to the outer surface of the ring, and the top of the placement plate is fixedly connected to the bottom of the projector.

[0008] Preferably, the stabilizing unit includes a drooping column, a placing block is fixedly connected to the bottom of the drooping column, a placing groove is arranged on the top of the placing block, side grooves are symmetrically arranged on the outer surface of the drooping column, a fixing mechanism is slidably connected to one end of the drooping column close to the side groove, a fixing plate is fixedly connected to the outer surface of the placing block, a telescopic spring is fixedly connected to the top of the fixing plate, a rubber plate is fixedly connected to the top of the telescopic spring, a support plate is fixedly connected to the outer surface of the rubber plate, and the top of the drooping column is fixedly connected to the bottom of the projector.

[0009] Preferably, the fixing mechanism includes a sliding circular plate, the inner wall of the sliding circular plate is fixedly connected to a support column, the bottom of the support column is fixedly connected to an insertion cylinder, the outer surface of the insertion cylinder is slidably connected to the inner wall of the slot, the inner wall of the sliding circular plate is slidably connected to the outer surface of the hanging column, and the outer surface of the sliding circular plate is fixedly connected to the top of support plate one.

[0010] Preferably, the image sensing unit includes a support plate 2, the outer surface of the support plate 2 is fixedly connected to the top of the projector, the inner wall of the support plate 2 is fixedly connected to a servo motor 2, the output end of the servo motor 2 is fixedly connected to a rotating shaft 1, the end of the rotating shaft 1 away from the servo motor 2 is fixedly connected to a calibration mechanism, the top of the support plate 2 is fixedly connected to an analog-to-digital converter, and the outer surface of the analog-to-digital converter is fixedly connected to a transmission line.

[0011] Preferably, the calibration mechanism includes a device plate, the outer surface of the device plate is fixedly connected to one end of the rotating shaft, ash leakage gaps are symmetrically arranged on both sides of the device plate, a receiving plate is fixedly connected to the inner wall of the device plate, and a cleaning mechanism is fixedly connected to the bottom of the device plate.

[0012] Preferably, the cleaning mechanism includes a sliding pillar, both ends of the sliding pillar are fixedly connected to the inner wall of the device plate, the outer surface of the sliding pillar is slidably connected to a sliding block, the outer surface of the sliding block is fixedly connected to a support plate three, the outer surface of the support plate three is slidably connected to a brush, both ends of the support plate three are slidably connected to a clamping block, the opposite surface of the clamping block is fixedly connected to a connecting column, and the outer surface of the clamping block is fixedly connected to a sweeping rod.

[0013] Preferably, the ceiling unit includes a hanging plate, which can be fixed to the wall by screws, the bottom of the hanging plate is fixedly connected to a supporting platform, the top of the supporting platform is fixedly connected to a control mainboard, the outer surface of the supporting platform is fixedly connected to a supporting frame, the top of the supporting frame is fixedly connected to a servo motor three, the output end of the servo motor three is fixedly connected to a rotating shaft two, one end of the rotating shaft two is fixedly connected to a gear one, the outer surface of the gear one is meshed with a gear two, the outer surface of the gear two is fixedly connected to a driving shaft, and the end of the driving shaft away from the gear two is fixedly connected to a positioning column.

[0014] An automatic calibration drive system for a projector includes: a wall-mounted drive module, which is arranged in a ceiling unit and is used to drive the whole structure suspended in the air to perform horizontal calibration and cooperate with a gravity drive module;

[0015] The gravity driving module is arranged in the gravity calibration unit and drives the projection head to be in a horizontal state through the action of gravity.

[0016] An automatic calibration method for a projector, comprising the following steps:

[0017] S1: First, place the device on the ground. The gravity calibration unit will automatically release the heavy ball. The gravity will cause the entire projection unit to rotate along the ring and automatically perform horizontal calibration.

[0018] S2: During the calibration process, the stabilization unit will ensure the stability of the gravity calibration unit and fix the structure after calibration;

[0019] S3: During the horizontal calibration process, the image sensor unit captures the image information of the image projected by the projector and performs data analysis;

[0020] S4: When the structure cannot be placed on the ground, the ceiling unit can hang the entire structure on the wall and assist the gravity calibration unit to perform horizontal calibration.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The present invention sets a gravity calibration unit. As the heavy ball moves downward, the gravity of the heavy ball will become greater and greater, which will drive the projector to rotate around the ring at a certain angle, and make the line connecting the heavy ball and the wire rope perpendicular to the horizontal plane, so that the image projected by the projector will not be tilted due to the tilt of the ground.

[0023] 2. The present invention sets a stabilizing unit. When the heavy ball moves to the lowest part during the falling process of the heavy ball, the sliding circular plate will also drive the inserted cylinder into the slot, so that the entire projection unit can no longer rotate, thereby ensuring the subsequent continuous horizontal stability without the need for re-calibration.

[0024] 3. The present invention sets an image sensing unit, and the projected image is irradiated onto the pixel array of the receiving board. The receiving board can sense the brightness, color distribution and edge of the picture and transmit the charge or current signal related to the light intensity generated by each pixel to the analog-to-digital converter through the transmission line. After these signals are processed by analog-to-digital conversion, the projection clarity will be obtained. If the clarity is low, the projector will automatically adjust the projected data.

[0025] 4. The present invention sets a cleaning mechanism, and the support plate three will slide downward again due to the action of gravity, thereby driving the brush to brush the surface of the receiving plate and brush off the attached dust. At the same time, when the device plate rotates ninety degrees, the block will also move along the support plate three and make the sweeping rod brush the brush, sweeping away the dust and impurities on the brush. The dust will float out from the dust leakage gap, thereby realizing self-cleaning, so that the subsequent cleaning effect of the receiving plate will not be deteriorated. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention.

[0027] Figure 2 It is a bottom view of the structure of the present invention.

[0028] Figure 3 It is a schematic structural diagram of the projection unit of the present invention.

[0029] Figure 4 It is a structural schematic diagram of the gravity calibration unit of the present invention.

[0030] Figure 5 It is a structural schematic diagram of the stabilizing unit of the present invention.

[0031] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0032] Figure 7 It is a structural schematic diagram of the image sensing unit of the present invention.

[0033] Figure 8 It is a structural schematic diagram of the calibration mechanism of the present invention.

[0034] Fig. 9 It is a structural schematic diagram of the cleaning mechanism of the present invention.

[0035] Fig.10 yes Fig. 9 Enlarged view of point B in the middle.

[0036] Fig.11 It is a structural schematic diagram of the ceiling unit of the present invention.

[0037] Fig.12is a block diagram of the automatic calibration method of the present invention.

[0038] In the figure: 1, support foot; 2, telescopic rod; 3, ring; 4, slot; 5, projection unit; 6, ceiling unit; 51, clamp; 52, support rod 1; 53, projector; 54, sleeve column; 55, projection head; 56, image sensor unit; 57, stabilization unit; 58, gravity calibration unit; 581, placement plate; 582, servo motor 1; 583, winding column; 584, wire rope; 585, heavy ball; 586, support rod 2; 587, cylindrical sleeve; 571, drooping column; 572, placement block; 573, placement slot; 574, side slot; 575, fixing mechanism; 576, telescopic spring; 577, rubber plate; 578, support plate 1; 579, fixing plate; 5751, sliding circular plate; 5752, support Support column; 5753, insert cylinder; 561, support plate two; 562, servo motor two; 563, shaft one; 564, calibration mechanism; 565, analog-to-digital converter; 566, transmission line; 5641, installation plate; 5642, dust leakage gap; 5643, receiving plate; 5644, cleaning mechanism; 56441, sliding pillar; 56442, sliding block; 56443, support plate three; 56444, brush; 56445, block; 56446, connecting column; 56447, sweeping rod; 61, hanging plate; 62, support platform; 63, control main board; 64, support frame; 65, servo motor three; 66, shaft two; 67, gear one; 68, gear two; 69, driving shaft; 610, positioning column. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0040] Example 1, using Figure 1-Figure 12 An automatic calibration method, structure and driving system for a projector according to an embodiment of the present invention are described as follows.

[0041] like Figure 1-Figure 2As shown, the automatic calibration structure for a projector of the present invention comprises a support foot 1, a telescopic rod 2 is fixedly connected to the top of the support foot 1, a ring 3 is fixedly connected to the top of the telescopic rod 2, a projection unit 5 is slidably connected to the outer surface of the ring 3, slots 4 are evenly arranged at the bottom of the ring 3, and a ceiling unit 6 is fixedly connected to the outer surface of the projection unit 5, and the ceiling unit 6 can be detached;

[0042] When the present invention is working, the height of the whole structure can be adjusted by the telescopic rod 2, and then the projection unit 5 will autonomously calibrate the level and detect the clarity of the projected image through image sensing. When the whole structure is not allowed to be placed on the ground, the structure can be fixed on the wall through the ceiling unit 6 and calibrated and projected.

[0043] like Figure 3 As shown, the projection unit 5 includes a clamping plate 51, a support rod 52 is fixedly connected to the outer surface of the clamping plate 51, a projector 53 is fixedly connected to the end of the support rod 52 away from the clamping plate 51, a sleeve column 54 is fixedly connected to the outer surface of the projector 53, a projection head 55 is fixedly connected to the end of the projector 53 away from the sleeve column 54, an image sensor unit 56 is fixedly connected to the top of the projector 53, a stabilizing unit 57 is fixedly connected to the bottom of the projector 53, and a gravity calibration unit 58 is fixedly connected to the end of the projector 53 close to the stabilizing unit 57;

[0044] like Figure 4 As shown, the gravity calibration unit 58 includes a placement plate 581, the outer surface of the placement plate 581 is fixedly connected to a servo motor 1 582, the output end of the servo motor 1 582 is fixedly connected to a winding column 583, the outer surface of the winding column 583 is sleeved with a steel wire rope 584, the bottom of the steel wire rope 584 is fixedly connected to a heavy ball 585, the two sides of the placement plate 581 are fixedly connected to support rods 2 586, the bottom of the support rods 2 586 is fixedly connected to a cylindrical sleeve 587, and the inner wall of the cylindrical sleeve 587 is slidably connected to the outer surface of the steel wire rope 584

[0045] After the entire tissue is placed, the servo motor 582 will drive the winding column 583 to rotate, so that the steel wire rope 584 releases the heavy ball 585 to move downward. As the heavy ball 585 moves downward, the gravity of the heavy ball 585 will become greater and greater, which will drive the projector 53 to rotate around the ring 3 at a certain angle, and make the line connecting the heavy ball 585 and the steel wire rope 584 perpendicular to the horizontal plane, so that the image projected by the projector 53 will not be tilted due to the tilt of the ground.

[0046] The inner wall of the clamping plate 51 is slidably connected to the outer surface of the ring 3 , and the top of the placement plate 581 is fixedly connected to the bottom of the projector 53 .

[0047] like Figure 5As shown, the stabilizing unit 57 includes a drooping column 571, the bottom of which is fixedly connected to a placement block 572, the top of which is provided with a placement groove 573, the outer surface of the drooping column 571 is symmetrically provided with side grooves 574, the end of the drooping column 571 close to the side groove 574 is slidably connected to a fixing mechanism 575, the outer surface of the placement block 572 is fixedly connected to a fixing plate 579, the top of the fixing plate 579 is fixedly connected to a telescopic spring 576, the top of the telescopic spring 576 is fixedly connected to a rubber plate 577, the outer surface of the rubber plate 577 is fixedly connected to a support plate 578, and the top of the drooping column 571 is fixedly connected to the bottom of the projector 53.

[0048] During the falling process of the heavy ball 585, if the gravity ball contacts the rubber plate 577 and drives the rubber plate 577 to move downward and finally falls into the placement groove 573, when the rubber plate 577 is driven to move downward, it will drive the support plate 1 578 to move downward.

[0049] like Figure 6 As shown, the fixing mechanism 575 includes a sliding circular plate 5751, the inner wall of the sliding circular plate 5751 is fixedly connected to a support column 5752, the bottom of the support column 5752 is fixedly connected to an insertion cylinder 5753, the outer surface of the insertion cylinder 5753 is slidably connected to the inner wall of the slot 4, the inner wall of the sliding circular plate 5751 is slidably connected to the outer surface of the hanging column 571, and the outer surface of the sliding circular plate 5751 is fixedly connected to the top of the support plate 578.

[0050] As the rubber plate 577 moves downward, the sliding circular plate 5751 is driven to move downward along the drooping column 571. When the heavy ball 585 moves to the lowest part, the sliding circular plate 5751 will also drive the insertion cylinder 5753 to enter the slot 4, so that the entire projection unit 5 can no longer rotate, thereby ensuring subsequent continuous horizontal stability without the need for re-calibration.

[0051] The specific workflow is as follows:

[0052] When working, the servo motor 582 will drive the winding column 583 to rotate, so that the steel wire rope 584 releases the heavy ball 585 to move downward, and the gravity will drive the projector 53 to rotate around the ring 3 at a certain angle, and make the connecting line of the heavy ball 585 and the steel wire rope 584 perpendicular to the horizontal plane, so that the image projected by the projector 53 will not be tilted due to the tilt of the ground. In the process of the heavy ball 585 falling, if the gravity ball contacts the rubber plate 577 and drives the rubber plate 577 to move downward and finally fall into the placement groove 573, when the rubber plate 577 is driven to move downward, it will drive the support plate 1 578 to move downward, and then drive the sliding circular plate 5751 to move downward along the drooping column 571. When the heavy ball 585 moves to the lowest part, the sliding circular plate 5751 will also drive the insertion column 5753 to enter the slot 4, so that the entire projection unit 5 can no longer rotate.

[0053] Example 2, using Figure 1-Figure 12 An automatic calibration method, structure and driving system for a projector according to an embodiment of the present invention are described as follows.

[0054] like Figure 7 As shown, the automatic calibration structure for a projector of the present invention is based on the first embodiment, and the image sensing unit 56 includes a second support plate 561, the outer surface of the second support plate 561 is fixedly connected to the top of the projector 53, the inner wall of the second support plate 561 is fixedly connected to a second servo motor 562, the output end of the second servo motor 562 is fixedly connected to a first rotating shaft 563, the end of the first rotating shaft 563 away from the second servo motor 562 is fixedly connected to a calibration mechanism 564, the top of the second support plate 561 is fixedly connected to an analog-to-digital converter 565, and the outer surface of the analog-to-digital converter 565 is fixedly connected to a transmission line 566.

[0055] Under normal conditions, the calibration mechanism 564 is located above the second support plate 561 . After the horizontal calibration is completed, the projector 53 will project an image, and the servo motor 2 562 will drive the first shaft 563 to rotate so that the calibration mechanism 564 moves to face the projection head 55 .

[0056] like Figure 8 As shown, the calibration mechanism 564 includes a device plate 5641, the outer surface of the device plate 5641 is fixedly connected to one end of the rotating shaft 563, the ash leakage notches 5642 are symmetrically arranged on both sides of the device plate 5641, the inner wall of the device plate 5641 is fixedly connected to a receiving plate 5643, and the bottom of the device plate 5641 is fixedly connected to a cleaning mechanism 5644.

[0057] The projected image is irradiated onto the pixel array of the receiving board 5643. The receiving board 5643 can sense the brightness, color distribution and edge of the picture and transmit the charge or current signal related to the light intensity generated by each pixel to the analog-to-digital converter 565 through the transmission line 566. After these signals are processed by analog-to-digital conversion, the projection clarity will be obtained. If the clarity is low, the projector 53 will automatically adjust the projection data.

[0058] like Figure 9-10 As shown, the cleaning mechanism 5644 includes a sliding pillar 56441, both ends of the sliding pillar 56441 are fixedly connected to the inner wall of the device plate 5641, the outer surface of the sliding pillar 56441 is slidably connected to a sliding block 56442, the outer surface of the sliding block 56442 is fixedly connected to a support plate three 56443, the outer surface of the support plate three 56443 is slidably connected to a brush 56444, both ends of the support plate three 56443 are slidably connected to a clamping block 56445, the opposite surface of the clamping block 56445 is fixedly connected to a connecting column 56446, and the outer surface of the clamping block 56445 is fixedly connected to a sweeping rod 56447.

[0059] If there are stains on the surface of the receiving plate 5643, it will affect the detection result. When the servo motor 2 562 drives the overall calibration mechanism 564 to rotate, the sliding block 56442 originally at the bottom will turn to the top, and gravity will slide downward again, thereby driving the brush 56444 to brush the surface of the receiving plate 5643 and brush off the attached dust. At the same time, when the device plate 5641 rotates ninety degrees, the block 56445 will also move along the support plate 3 56443 and make the sweeping rod 56447 brush the brush 56444, sweeping off the dust and impurities on the brush 56444. The dust will float out from the dust leakage gap 5642, thereby realizing self-cleaning, so that the subsequent cleaning effect of the receiving plate 5643 will not be deteriorated.

[0060] like Fig.11 As shown, the ceiling unit 6 includes a hanging plate 61, which can be fixed to the wall by screws, the bottom of the hanging plate 61 is fixedly connected to a supporting platform 62, the top of the supporting platform 62 is fixedly connected to a control main board 63, the outer surface of the supporting platform 62 is fixedly connected to a supporting frame 64, the top of the supporting frame 64 is fixedly connected to a servo motor three 65, the output end of the servo motor three 65 is fixedly connected to a rotating shaft two 66, one end of the rotating shaft two 66 is fixedly connected to a gear one 67, the outer surface of the gear one 67 is meshed with a gear two 68, the outer surface of the gear two 68 is fixedly connected to a driving shaft 69, and the end of the driving shaft 69 away from the gear two 68 is fixedly connected to a positioning column 610.

[0061] When the structure needs to be fixed on the wall, the hanging plate 61 can be fixed to the top by screws, and then the control main board 63 will drive the servo motor three 65 to drive the gear one 67 to rotate according to the situation on site, and then drive the gear two 68 and the driving shaft 69 to rotate, so that the projection unit 5 is in a horizontal state.

[0062] The automatic calibration drive system for the projector comprises: a wall-mounted drive module, which is arranged in the ceiling unit 6 and is used to drive the whole structure suspended in the air to perform horizontal calibration and cooperate with the gravity drive module;

[0063] The gravity driving module is disposed in the gravity calibration unit 58 and drives the projection head 55 to be in a horizontal state through the action of gravity.

[0064] An automatic calibration method for a projector, comprising the following steps:

[0065] S1: First, place the device on the ground, the gravity calibration unit 58 will automatically release the heavy ball 585, and the gravity will cause the entire projection unit 5 to rotate along the ring 3 and automatically perform horizontal calibration;

[0066] S2: During the calibration process, the stabilizing unit 57 ensures the stability of the gravity calibration unit 58 and fixes the structure after calibration;

[0067] S3: During the horizontal calibration process, the image sensor unit 56 captures the image information of the image projected by the projector 53 and performs data analysis;

[0068] S4: When the structure cannot be placed on the ground, the ceiling unit 6 can hang the entire structure on the wall and assist the gravity calibration unit 58 in performing horizontal calibration.

[0069] The specific workflow is as follows:

[0070] When working, the servo motor 2 562 drives the rotating shaft 1 563 to rotate and move the calibration mechanism 564 to face the projection head 55, so that the projected image is irradiated on the pixel array of the receiving board 5643. The receiving board 5643 can sense the brightness, color distribution and edge of the picture and transmit the charge or current signal related to the light intensity generated by each pixel to the analog-to-digital converter 565 through the transmission line 566, so that the projector 53 automatically adjusts the projection data. During the rotation of structure 564, the sliding block 56442 originally at the bottom will turn to the top, and the gravity will slide downward again, thereby driving the brush 56444 to brush the surface of the receiving plate 5643 and brush off the attached dust. At the same time, when the device plate 5641 rotates ninety degrees, the block 56445 will also move along the support plate three 56443 and make the sweeping rod 56447 brush the brush 56444, sweeping off the dust and impurities on the brush 56444, and the dust will float out from the dust leakage gap 5642.

[0071] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. An automatic calibration structure for a projector, comprising a support foot (1), characterized in that: The top of the support foot (1) is fixedly connected to a telescopic rod (2), the top of the telescopic rod (2) is fixedly connected to a circular ring (3), the outer surface of the circular ring (3) is slidably connected to a projection unit (5), the bottom of the circular ring (3) is evenly provided with slots (4), the outer surface of the projection unit (5) is fixedly connected to a ceiling unit (6), and the ceiling unit (6) is detachable; The projection unit (5) comprises a clamping plate (51), the outer surface of the clamping plate (51) is fixedly connected to a support rod (52), the end of the support rod (52) away from the clamping plate (51) is fixedly connected to a projector (53), the outer surface of the projector (53) is fixedly connected to a sleeve column (54), the end of the projector (53) away from the sleeve column (54) is fixedly connected to a projection head (55), the top of the projector (53) is fixedly connected to an image sensor unit (56), the bottom of the projector (53) is fixedly connected to a stabilizing unit (57), and the end of the projector (53) close to the stabilizing unit (57) is fixedly connected to a gravity calibration unit (58); The gravity calibration unit (58) comprises a placement plate (581), the outer surface of the placement plate (581) is fixedly connected to a servo motor 1 (582), the output end of the servo motor 1 (582) is fixedly connected to a winding column (583), the outer surface of the winding column (583) is sleeved with a steel wire rope (584), the bottom of the steel wire rope (584) is fixedly connected to a heavy ball (585), the two sides of the placement plate (581) are fixedly connected to support rod 2 (586), the bottom of the support rod 2 (586) is fixedly connected to a cylindrical sleeve (587), and the inner wall of the cylindrical sleeve (587) is slidably connected to the outer surface of the steel wire rope (584).

2. The automatic calibration structure for a projector according to claim 1, characterized in that: The inner wall of the clamping plate (51) is slidably connected to the outer surface of the ring (3), and the top of the placement plate (581) is fixedly connected to the bottom of the projector (53).

3. The automatic calibration structure for a projector according to claim 1, characterized in that: The stabilizing unit (57) comprises a drooping column (571), the bottom of the drooping column (571) is fixedly connected to a placement block (572), the top of the placement block (572) is provided with a placement groove (573), the outer surface of the drooping column (571) is symmetrically provided with side grooves (574), one end of the drooping column (571) close to the side groove (574) is slidably connected to a fixing mechanism (575), the outer surface of the placement block (572) is fixedly connected to a fixing plate (579), the top of the fixing plate (579) is fixedly connected to a telescopic spring (576), the top of the telescopic spring (576) is fixedly connected to a rubber plate (577), the outer surface of the rubber plate (577) is fixedly connected to a support plate 1 (578), and the top of the drooping column (571) is fixedly connected to the bottom of the projector (53).

4. The automatic calibration structure for a projector according to claim 3, characterized in that: The fixing mechanism (575) comprises a sliding circular plate (5751), the inner wall of the sliding circular plate (5751) is fixedly connected to a support column (5752), the bottom of the support column (5752) is fixedly connected to an insertion column (5753), the outer surface of the insertion column (5753) is slidably connected to the inner wall of the slot (4), the inner wall of the sliding circular plate (5751) is slidably connected to the outer surface of the hanging column (571), and the outer surface of the sliding circular plate (5751) is fixedly connected to the top of the support plate 1 (578).

5. The automatic calibration structure for a projector according to claim 1, characterized in that: The image sensing unit (56) comprises a second support plate (561), the outer surface of the second support plate (561) is fixedly connected to the top of the projector (53), the inner wall of the second support plate (561) is fixedly connected to a second servo motor (562), the output end of the second servo motor (562) is fixedly connected to a first rotating shaft (563), the end of the first rotating shaft (563) away from the second servo motor (562) is fixedly connected to a calibration mechanism (564), the top of the second support plate (561) is fixedly connected to an analog-to-digital converter (565), and the outer surface of the analog-to-digital converter (565) is fixedly connected to a transmission line (566).

6. The automatic calibration structure for a projector according to claim 5, characterized in that: The calibration mechanism (564) comprises a device plate (5641), the outer surface of which is fixedly connected to one end of a rotating shaft (563), ash leakage notches (5642) are symmetrically arranged on both sides of the device plate (5641), a receiving plate (5643) is fixedly connected to the inner wall of the device plate (5641), and a cleaning mechanism (5644) is fixedly connected to the bottom of the device plate (5641).

7. The automatic calibration structure for a projector according to claim 6, characterized in that: The cleaning mechanism (5644) comprises a sliding pillar (56441), the two ends of the sliding pillar (56441) are fixedly connected to the inner wall of the device plate (5641), the outer surface of the sliding pillar (56441) is slidably connected to a sliding block (56442), the outer surface of the sliding block (56442) is fixedly connected to a support plate three (56443), the outer surface of the support plate three (56443) is slidably connected to a brush (56444), the two ends of the support plate three (56443) are slidably connected to a clamping block (56445), the opposite surface of the clamping block (56445) is fixedly connected to a connecting column (56446), and the outer surface of the clamping block (56445) is fixedly connected to a sweeping rod (56447).

8. The automatic calibration structure for a projector according to claim 1, characterized in that: The ceiling unit (6) comprises a hanging plate (61), which can be fixed on the wall by screws, the bottom of the hanging plate (61) is fixedly connected to a support platform (62), the top of the support platform (62) is fixedly connected to a control main board (63), the outer surface of the support platform (62) is fixedly connected to a support frame (64), the top of the support frame (64) is fixedly connected to a servo motor three (65), the output end of the servo motor three (65) is fixedly connected to a rotating shaft two (66), one end of the rotating shaft two (66) is fixedly connected to a gear one (67), the outer surface of the gear one (67) is meshed with a gear two (68), the outer surface of the gear two (68) is fixedly connected to a driving shaft (69), and the end of the driving shaft (69) away from the gear two (68) is fixedly connected to a positioning column (610).

9. An automatic calibration driving system for a projector, driven by the automatic calibration structure for a projector according to any one of claims 1 to 8, characterized in that: include: A wall-mounted driving module is arranged in the ceiling unit (6) and is used to drive the whole structure suspended in the air to perform horizontal calibration and cooperate with the gravity driving module; The gravity driving module is arranged in the gravity calibration unit (58) and drives the projection head (55) to be in a horizontal state through the action of gravity.

10. An automatic calibration method for a projector, wherein the calibration is implemented according to the automatic calibration structure for a projector according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: First, place the device on the ground, the gravity calibration unit (58) will automatically release the heavy ball (585), and the gravity will cause the entire projection unit (5) to rotate along the ring (3) and automatically perform horizontal calibration; S2: During the calibration process, the stabilizing unit (57) ensures the stability of the gravity calibration unit (58) and fixes the structure after calibration; S3: During the horizontal calibration process, the image sensor unit (56) captures the image information of the image projected by the projector (53) and performs data analysis; S4: When the structure cannot be placed on the ground, the ceiling unit (6) can hang the entire structure on the wall and assist the gravity calibration unit (58) in performing horizontal calibration.

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