Please select the most similar patent number from A, B, C and D. Which number is?
An intelligent belt which automatically monitors and adjusts tightness by means of an electromagnetic array, comprising: a belt buckle (1) and a belt body (2); the belt buckle (1) comprises a waist measuring device (11), a tightness adjustment device (12) and a belt fixing device (13); the waist measuring device (11), the tightness adjustment device (12) and the belt fixing device (13) are all provided with hollow housings having a rectangular cuboid structure, the housings being sequentially hinged by means of a hinge (112); the waist measuring device (11) comprises a roller (113), a rotary encoder (114) and a counter (115); the tightness adjustment device (12) comprises a microcontroller (123), a gyroscope (124), a wireless transceiving device (125), an accelerometer (126), a pressure sensor (116), a pressing plate (128), a magnet (129) and an electromagnet array (122), which are respectively disposed in an inner cavity; one end of the belt body (2) is connected to the belt fixing device (13), while the other end is provided with a snap-slot (21) and an adjustment buckle (22). The intelligent belt which automatically monitors and adjusts tightness by means of an electromagnetic array has a well-designed structure, and has a simple structure, while being convenient to use, safe and reliable, highly intelligent and so on, effectively solving the problem wherein an ordinary belt cannot automatically adjust the length thereof.
A: A lower limb movement-assisting machine skeleton having a center-of-gravity self-adjustment and balancing function, comprising a base (1), hip supports (2), crus supports (3), foot securing plates (4), and drivers (5). A waist rotating base (12) is hingedly connected to the base (1); the waist rotating base (12) is provided with a center-of-gravity adjusting device (17); the center-of-gravity adjusting device (17) comprises support blocks (170), a first motor (171), a lead screw (172), a counterweight slide block (173), and buffer springs (174); the upper ends of the hip supports (2) are hingedly connected to the lower surface of the base (1) by means of second spherical hinges (22); the lower ends of the hip supports (2) are hingedly connected to the upper ends of the crus supports (3); the lower ends of the crus supports (3) are connected with the foot securing plates (4). The lower limb movement-assisting machine skeleton having a center-of-gravity self-adjustment and balancing function is reasonable in structure, has the advantages of a simple structure, convenient use, and a high intelligence level, and effectively resolves the problem that the existing lower limb movement-assisting machine skeleton cannot well stabilize the center of gravity of a human body.
B: Provided are a belt (10) adjustment method and belt (10); the belt (10) comprises a belt body (12), a belt buckle (11) arranged on one end of the belt body (12), and an engaging member (13) arranged on the other end of the belt body (12); the engaging member (13) is elongated; the belt body (12) forms a closed loop when the belt buckle (11) and the engaging member (13) are engaged; the belt (10) adjustment method comprises: when the belt (10) is in an automatic adjustment mode, the current pull-together size and current tightening force are obtained, and it is determined whether the current tightening force has changed; if it is determined that the current tightening force has changed and the change exceeds a first threshold, then the current pull-together size is adjusted to a target pull-together size (S705); the physical change conditions of the user are monitored and adjustment is made automatically, improving satisfaction regarding the use of the belt (10).
C: Provided is a tightness adjustment device, comprising an adjustment cord, two toothed tapes, and a slider which matches the two toothed tapes. Each toothed tape comprises a tape and a row of teeth arranged on a working side of the tape. The slider is internally provided with two channels, wherein the two rows of teeth extend into the two channels in one-to-one correspondence, and the two channels at least converge at a first end to form a tightening channel. The slider is further provided with a separator block, wherein the separator block is located between the two channels; and the separator block is provided with a separator cone, the tip of which faces the tightening channel, with the separator cone being in one-to-one correspondence with the tightening channel. The adjustment cord is connected to the slider. By means of such a configuration, in the tightness adjustment device provided in the present invention, the adjustment cord can be fully arranged inside same, the structure is simple and compact, and by means of pulling the slider, the adjustment cord inside can be driven to tighten or loosen. In addition, when the tightness adjustment device provided in the present invention performs tightness adjustment, it is only necessary to pull the slider, and operation thereof can be performed with one hand.
D: A high-pressure centrifugal intelligent quick coffee filtering and brewing apparatus, comprising an adjustable support (1) and a centrifugal filtering and brewing mechanism (2), wherein the adjustable support (1) comprises a base plate (11), an upright column (12) vertically fixedly provided on the base plate (11), a first supporting plate (13) and a second supporting plate (15); an upper end of the upright column (12) is provided with a hollow cavity (121) which is provided with an upward opening, the hollow cavity (121) being internally provided with a first motor (123), a screw rod (124) and a bearing (125); a lower end of the upright column (12) is provided with a plurality of adjusting screw holes (16), and the first supporting plate (13) and an adjusting screw hole (16) are fixedly connected to each other by means of a bolt; the first supporting plate (13) is further embedded with a second motor (131), and a spindle of the second motor (131) is provided thereon with a transmission gear (132); the centrifugal filtering and brewing mechanism (2) comprises a pot body (21), a rotary base (22), a lid body (23), a water pump (24), a funnel (25) and a water conveying tube (26). The present high-pressure centrifugal intelligent quick coffee filtering and brewing apparatus has a reasonable structure, and has the advantages of a simple structure, convenient use, fast brewing speed, being safe and reliable, having a good brewing effect, and so on.
Answer: B