Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed is an LED induction lamp for buildings. The LED induction lamp comprises a fixed block (2), wherein a lampshade (3) is arranged at a lower end of the fixed block (2); a plurality of LED lamps (5) are equidistantly arranged inside the lampshade (3) in a surrounding manner; an infrared sensor (7) is arranged on an inner wall at one side of the lampshade (3); a groove is formed in a fixed seat (1); the fixed block (2) is arranged in the groove; fixing devices (9) are arranged at both ends of the groove; a connecting rod (6) is arranged at an upper end of the fixed block (2); a cross rod (8) is transversely arranged on the connecting rod (6); a sound-sensitive sensor (7) is arranged on the cross rod (8); a control system is arranged inside the fixed seat (1); the control system comprises a control module, a power module and a light regulation module; and an output end of the infrared sensor (7) is electrically connected to an input end of the control module. The LED induction lamp for buildings has a simple structure, is convenient to manufacture, and determines whether there are pedestrians passing by means of infrared rays, thereby saving energy, prolonging the service life of an LED lamp, and also reducing usage costs.
A: Provided is an ultraviolet disinfection and sterilization device, comprising a device body (1) and a control box (2); the top end surface of said device body (1) is fixedly provided with a mount (4); the top surface of said mount (4) is provided with a recess (6); the bottom end of said control box (2) is fixedly provided with a base (5); the outer surface of said base (5) is snap-fitted to the inner wall of the recess (6); the base (5) is internally provided with a movable groove (7); said movable groove (7) is internally provided with an abutting rod (8); the outer surface of said abutting rod (8) is fixedly provided with a fixing block (10); the control box (2) is placed on the top end of the mount (4) and fixed; by means of screwing a bolt (13) to a threaded groove (14), its tip enters an abutting groove (11) and abuts against the surface of the abutting rod (8), driving the abutting rod (8) to move, such that the other end of the abutting rod (8) is snap-fastened to the inner wall of a snap groove (12), limiting the position of the base (5) to be fixed; the control box (2) can be quickly connected to the device body (1), ensuring a steady connection, making disassembly for maintenance easier, thereby increasing operating efficiency and avoiding the danger of collapsing and overturning when bearing loads for long periods of time, thus the service life is further increased.
B: A cutting apparatus for use on composite boards, comprising: a transverse beam device (1), a supporting frame (3) which conveys a composite board (2), a cutting mechanism (4) which is located directly above the composite board (2) and which is for use in cutting the composite board (2), and a cylinder device (5) which fixes the composite board (2); two ends of the transverse beam device (1) are fixed with a vertical beam device (6), wherein inner sides of the vertical beam device (6) are provided with a first fixing block (71) connected to a guide rail of the vertical beam device (6); a cross bar (8) parallel to the transverse beam device (1) is connected between the first fixing block (71), wherein a second fixing block (72) is connected to a lower surface guide rail of the cross bar (8), the cutting mechanism (4) being fixed on the second fixing block (72); the supporting frame (3) is provided thereon with an infrared sensor (9) which detects a cutter (41) on the cutting mechanism (4), wherein the infrared sensor (9) is connected, by means of a circuit, to a control cabinet (10) which controls the first fixing block (71) to run on the vertical beam device (6). The cutting apparatus may cut composite boards (2) of different thicknesses, and may freely adjust cutting position according to requirements, while having a simple structure and a wide range of applications.
C: Disclosed is a magnetic-type concealed surveillance camera for easy installation, the surveillance camera comprising a housing (1) and a camera (3). The camera (3) is arranged inside the housing (1), a first connection rod (5) is fixedly connected to an outer side wall of the housing (1), an end of the first connection rod (5) away from the housing (1) is rotationally connected to a rotating shaft (7), an outer end of the rotating shaft (7) is fixedly connected to a second connection rod (8), the upper end of the second connection rod (8) is provided with a fixing block (11), a placement groove is provided in the lower end of the fixing block (11), an electric motor (13) is fixedly connected to an inner side wall of the interior of the placement groove, a gear (9) is fixedly connected to an output end of the electric motor (13), a groove is provided in an end of the second connection rod (8) close to the electric motor (13), a rack (10) is fixedly connected to an inner side wall of the groove, the rack (10) is in meshing connection with the gear (9), and a plurality of L-shaped rods (14) are fixedly connected to an outer end of the second connection rod (8).
D: An LED street lamp enabling convenient adjustment of lighting angle and lighting brightness, comprising a power source, a vertical column, a lamp body (1), and a lamp cover (2), a baffle (3) being arranged inside the lamp body (1), a driver (5) being arranged above the baffle (3), and a control box (6) being arranged below same, a controller (7) being arranged inside the control box (6), a fixed light panel (9) and a moving light panel (10) being arranged below the control box (6), the fixed light panel (9) being fixedly connected to the control box (6) by means of a fixing rod (8), the fixed light panel (9) being connected to the moving light panel (10) by means of a transmission mechanism, the transmission mechanism comprising a linking rod (14) and a telescopic rod arranged between the fixed light panel (9) and the moving light panel (10), LED light bulbs (12) being arranged below the fixed light panel (9) and the moving light panel (10), a switch box (11) being arranged on the moving light panel (10), the driver (5), the switch box (11) and the controller (7) all being electrically connected, the driver (5) and the switch box (11) both being electrically connected to the LED light bulbs (12), and the controller (7) being electrically connected to a telescopic member (16). Adjustment of the lighting angle is thus facilitated, meeting the requirements for light concentration and diffusion effects, and the switching on or off of the lightbulbs (12) can be controlled, thus adjusting the lighting brightness.
Answer: D