Abstract: A road sign for determining the position of a robot, a device, and a method for distinguishing labels with different functions in a road sign, wherein the road sign is composed of more than one label with different functions; a label is composed of more than one mark; and the marks are coated with a conversion material capable of exciting light with a specific wavelength, or made of the conversion material. Excited light can be used to excite the conversion material to emit emission light, and the road sign is recognized by collecting the emission light, so that interference when the road sign is recognized can be effectively reduced.

Abstract: A microelectromechanical system (MEMS) acceleration sensor includes a mass bar, a first spring disposed on a first set of opposite sides of the mass bar and configured to secure the mass bar in a first direction, an interdigital structure disposed along a second set of opposite sides of the mass bar in a second direction perpendicular to the first direction, a detection electrode corresponding to the interdigital structure, and a second spring disposed on the second set of opposite sides and configured to secure the mass bar in the second direction. The first spring has a frame shape, and the second spring has an S-shape. Through the second spring, the acceleration sensor is less sensitive to acceleration on the other direction, so that the detection performance of the acceleration sensor is improved.

Abstract: A microelectromechanical system (MEMS) acceleration sensor includes a mass bar, a first spring disposed on a first set of opposite sides of the mass bar and configured to secure the mass bar in a first direction, an interdigital structure disposed along a second set of opposite sides of the mass bar in a second direction perpendicular to the first direction, a detection electrode corresponding to the interdigital structure, and a second spring disposed on the second set of opposite sides and configured to secure the mass bar in the second direction. The first spring has a frame shape, and the second spring has an S-shape. Through the second spring, the acceleration sensor is less sensitive to acceleration on the other direction, so that the detection performance of the acceleration sensor is improved.