Abstract: A drone communication system and an operation method thereof are provided. The operation method of the drone communication system is applicable for obtaining a plurality of base station coordinates corresponding to a plurality of base stations in a flight field. The operation method includes the following steps: communicating with at least three base stations adjacent to a parking apron apparatus to obtain at least three base station coordinates of the at least three base stations; communicating with another base station adjacent to the at least three base stations through the at least three base stations; estimating another base station coordinate of the another base station according to the at least three base station coordinates of the at least three base stations; and storing the plurality of base station coordinates and providing the plurality of base station coordinates to a drone parked on the parking apron apparatus.

Abstract: A drone and a positioning method thereof, a drone communication system and an operation method thereof are provided. The positioning method of the drone is applicable for a drone to cruise in a flight field. The positioning method includes the following steps: flying according to a destination coordinate in the flight field; sensing a plurality of base stations via a first wireless communication module to obtain a plurality of first radio wave signals of the plurality of base stations; positioning according to the plurality of first radio wave signals to determine a current coordinate of the drone; and flying toward the destination coordinate in the flight field according to the current coordinate. In this way, the drone is capable of reliably positioning to effectively perform automatic flight missions.

Abstract: A power supply control method and a monitoring system configured to implement the power supply control method are provided. The monitoring system includes a base station, a drone, and a processor. The base station includes a charging device. The charging device includes a power supply connector and a power source coupled to the power supply connector and outputting electric power through the power supply connector. The drone includes a battery configured to provide electric power to the drone and a charging connector configured to connect the battery and the power supply connector. When the charging connector is connected to the power supply connector, the processor determines an abnormal situation on the power supply connector or the drone according to an electrical characteristic during charging the battery by the power source. The abnormal situation is associated with a foreign object formed on the power supply connector or the drone.

Abstract: Embodiments of the invention provide a power supply control method and a monitor system capable of executing the power supply control method. The monitor system includes a base station, an image capture apparatus, and a processor. The base station includes a charging apparatus including a power supply connector and a power source coupled to the power supply connector and outputting power through the power supply connector. The image capture apparatus shoots the power supply connector to obtain a shot image. The processor determines a foreign object distribution on the power supply connector according to the shot image and sends a warning message according to the foreign object distribution. The foreign object distribution relates to foreign objects formed on the power supply connector. Accordingly, whether a charging mechanism fails can be automatically determined and notification and/or compensation may be performed when the charging mechanism fails.

Abstract: A power supply control method and a monitoring system configured to implement the power supply control method are provided. The monitoring system includes a base station, a drone, and a processor. The base station includes a charging device. The charging device includes a power supply connector and a power source coupled to the power supply connector and outputting electric power through the power supply connector. The drone includes a battery configured to provide electric power to the drone and a charging connector configured to connect the battery and the power supply connector. When the charging connector is connected to the power supply connector, the processor determines an abnormal situation on the power supply connector or the drone according to an electrical characteristic during charging the battery by the power source. The abnormal situation is associated with a foreign object formed on the power supply connector or the drone.

Abstract: A drone and a positioning method thereof, a drone communication system and an operation method thereof are provided. The positioning method of the drone is applicable for a drone to cruise in a flight field. The positioning method includes the following steps: flying according to a destination coordinate in the flight field; sensing a plurality of base stations via a first wireless communication module to obtain a plurality of first radio wave signals of the plurality of base stations; positioning according to the plurality of first radio wave signals to determine a current coordinate of the drone; and flying toward the destination coordinate in the flight field according to the current coordinate. In this way, the drone is capable of reliably positioning to effectively perform automatic flight missions.

Abstract: A flight device includes a device body with a surface, a plurality of arm structures disposed in the device body and a plurality of rotor modules disposed to the arm structures respectively. Each arm structure includes a fixing base, a second screw element, a connecting unit, a rod body and a position-limiting element. The fixing base is disposed in the device body and includes a first screw element having a first screw part. The second screw element has a second screw part matched with the first screw part. The connecting unit drills through the second screw element. The connecting unit is locked to the fixing base by screwing the first and second screw parts with each other. The rod body drills through the connecting unit. The position-limiting element is disposed between the second screw element and the connecting unit. The position-limiting element abuts against the second screw element.

Abstract: A flight device includes a device body with a surface, a plurality of arm structures disposed in the device body and a plurality of rotor modules disposed to the arm structures respectively. Each arm structure includes a fixing base, a second screw element, a connecting unit, a rod body and a position-limiting element. The fixing base is disposed in the device body and includes a first screw element having a first screw part. The second screw element has a second screw part matched with the first screw part. The connecting unit drills through the second screw element. The connecting unit is locked to the fixing base by screwing the first and second screw parts with each other. The rod body drills through the connecting unit. The position-limiting element is disposed between the second screw element and the connecting unit. The position-limiting element abuts against the second screw element.

Abstract: An open-closed structure is used to open or close a lamp door of a projector. The projector includes a main lid. The lamp door covers the outer side of the main lid. The open-closed structure includes a base and a knob. The base is disposed at the inner side of the main lid. The knob is rotatably disposed on the base, and has an axial portion, a hook portion and a stick-like portion. One end of the hook portion is connected to the axial portion, and another end of that is selectively engaged with or separated from the lamp door. One end of the stick-like portion is also connected to the axial portion. When the axial portion of the knob is rotated to make the another end of the hook portion separated from the lamp door, another end of the stick-like portion is dependently moved to push the lamp door.

Abstract: An automatic iris diaphragm module is adapted to a projector having a casing, and is capable of adjusting a size of luminous flux of a light source of the projector. The automatic iris diaphragm module is provided with a chassis, a fixed mask, a movable mask, a drive rack, and a motor. The chassis is fixed on the casing. The fixed mask is fixed on the chassis and has an opening. The movable mask is slidably disposed on the fixed mask. The drive rack is fixed on the movable mask. The motor is fixed on the chassis and has a driving gear engaging with the drive rack for driving the drive rack to make the movable mask slide relative to the fixed mask, for adjusting the size of the luminous flux of the light source through the opening.

Abstract: An interface panel structure used in an electric machine; comprises a fixed seat with a fixed seat with a holding element and sliding rails and a movable sliding seat installed therein. Fixing holes for accepting the holding element and sliding grooves operated in cooperation with the sliding rails are disposed in the sliding seat. In addition, a guide rod is installed in the sliding seat for touching off the holding the holding element to separate it from the fixing hole. When the holding element and the fixing hole are engaged, the sliding seat with interface outlets disposed at the front face thereof is hidden in the fixed seat fixed in the electric machine. And, there is no need to open holes on the surface of the electric machine by means of the interface panel structure.

Abstract: The cooling apparatus for illumination system of optical engine of the present invention includes: illumination system that has a lamp base for its light source, wherein the lamp has an air duct body fixed on one side of the lamp base, wherein there is at least one partition separating the air duct body into a plurality of air ducts of different surface areas, and an external air duct extending one of the air ducts from underneath the air duct body to outside of the air duct body, wherein a fan installed on the air duct body takes in air through each of the air ducts and the external air duct to cool the illumination system, thus improving the cooling efficiency of the fans, while reducing the volume of cooling air needed from the fans, lowering the cost and reducing the noise from the fans.

Abstract: An adjusting apparatus for projection comprises a carrier having a central screw hole and three rounded indentations around central screw hole, an adjusting frame having a plane section and a base section, and a holder. The center of the plane section has a circular concave dug a hole with a smaller aperture. A ball bearing is accommodated in the circular concave. The plane section of the adjusting frame has three screw holes corresponding to the rounded indentations. Three angle-adjusting bolts respectively insert through the screw holes to abut against the rounded indentations. Rotating the angle-adjusting bolts relative to each other varies the length of the angle-adjusting bolts calculated from the plane section of the adjusting frame to the carrier. Thereby, an angle adjustment of a mirror is achieved.

Abstract: An adjusting apparatus for projection comprises a carrier having a central screw hole and three rounded indentations around central screw hole, an adjusting frame having a plane section and a base section, and a holder. The center of the plane section has a circular concave dug a hole with a smaller aperture. A ball bearing is accommodated in the circular concave. The plane section of the adjusting frame has three screw holes corresponding to the rounded indentations. Three angle-adjusting bolts respectively insert through the screw holes to abut against the rounded indentations. Rotating the angle-adjusting bolts relative to each other varies the length of the angle-adjusting bolts calculated from the plane section of the adjusting frame to the carrier. Thereby, an angle adjustment of a mirror is achieved.

Abstract: The invention is related to a fixture device for motherboard module by placing two fixing plates on the locational surface of a major control device. A Π-shaped slide way with the same width as the motherboard module is formed on the base plate below the fixing plate. Additionally, a locating button in front of the opening of the slide way is used to secure the motherboard module into the slide way. Through this approach, the motherboard module can be easily installed/disassembled by pressing the locating button without using any tools or test fixtures.

Abstract: The present invention relates to an adjustable height apparatus applied to a horizontal projector and comprises a shield assembly, a supporting means, a compression link and a lever. When adjusting the projection elevation, an external force is applied on an adjusting button of the top wall of the projector. The compression link, connecting with the button, makes a vertical movement according to the external force and pushes the detent of the lever to depart from contact with the axial height-positioning component. The sleeve extends toward the outside of said shell by the elasticity of a first elastic component for adjusting a suitable height of the bottom base of the supporting means of the projector.

Abstract: The present invention is that a digital television comprises an inside, a maintain cover, a panel of a front of the digital television, at least one DVD slot and an ejection button around the panel, a hollow sliding frame inside the digital television, an exit of the sliding frame facing the maintain cover, a personal computer mainframe, which comprises a case, a plurality of grooves on upper surface and lower surface of the case and being installed along a central line of the case, a handle on the case toward an end surface of the maintain cover and being capable of pushing the personal computer mainframe into the sliding frame from the exit of the sliding frame being on the reverse side of the end of the maintain cover, a protruded DVD player connecting to the DVD slot and the ejection button for fast assembling and disassembling the computer mainframe to be in maintain and upgrade and offering multiple functions and options to consumers.

Abstract: The invention is related to a fixture device for motherboard module by placing two fixing plates on the locational surface of a major control device. A ∏-shaped slider with the same width as the motherboard module is formed on the base plate below the fixing plate. Additionally, a locating button in front of the opening of the slider is used to secure the motherboard module into the slider. Through this approach, the motherboard module can be easily installed/disassembled by pressing the locating button without using any tools or test fixtures.