# US 12,181,491 B2 · Waterproof reflection unit and ultrasonic anemometer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,181,491 B2 - Document ID: US12181491B2 - Status: Granted - Kind: B2 - Application number: 17/708,900 - Filed: 2022-03-30 - Published: 2022-07-21 - Granted: 2024-12-31 - Earliest claimed: 2019-09-30 - Assignees: Shenzhen Fine Offset Electronics Co., Ltd. - Applicants: Shenzhen Fine Offset Electronics Co., Ltd. - Inventors: Yuhong Xu - Web page: https://patentgrep.com/patent/US12181491B2 ## CPC - G01P 5/241: {by using reflection of acoustical waves, i.e. Doppler-effect} - G01P 5/245: {by measuring transit time of acoustical waves (measuring propagation velocity of acoustical waves per se G01H5/00)} - G01P 1/026: {for speed measuring devices, e.g. pulse generator} - G01P: MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT (measuring or recording blood flow A61B5/02, A61B8/06; monitoring speed or deceleration of electrically-propelled vehicles B60L3/00; vehicle lighting systems adapted to indicate speed B60Q1/54; determining position or course in navigation, measuring ground distance in geodesy or surveying G01C; combined measuring devices for measuring two or more variables of movement G01C23/00; measuring velocity of sound G01H; measuring velocity of light G01J7/00; measuring direction or velocity of solid objects by reception or emission of radiowaves or other waves and based on propagation effects, e.g. Doppler effect, propagation time, direction of propagation, G01S; measuring speed of nuclear radiation G01T; measuring acceleration of gravity G01V; {measuring or recording the speed of trains B61L23/00; speed indicators incorporated in motor vehicles B60K35/00; measuring frequency or phase G01R; traffic control G08G}) ## Abstract The disclosure relates to a reflection unit applied to an ultrasonic anemometer and used to reflect ultrasonic waves from a transmitter, wherein the reflected ultrasonic waves are received by a receiver. The reflection unit comprises a reflection plate and further comprises a mesh cover layer structure covering on the upper surface of the reflection plate. In an embodiment of the present disclosure, the mesh cover layer is provided on the reflection plate, so that the raindrops/water droplets falling on the reflection unit can be quickly scattered on the surface of the reflection unit, thereby eliminating the irregular shape and high liquid accumulation formed on the surface of the reflection unit, ensuring the accuracy of ultrasonic anemometer measurements in wind and rain conditions. ## Claims ### Claim 1 A reflection unit, comprising a reflection plate and a mesh cover layer covering an upper surface of the reflection plate, wherein a sunken bayonet is provided on the reflection plate and the mesh cover layer is inserted into the sunken bayonet to connect with the reflection plate. ### Claim 2 (depends on 1) The reflection unit of claim 1, wherein the upper surface of the reflection plate is a convex surface curved in the middle, or a structure of a combination of a plane and an inclined surface. ### Claim 3 (depends on 1) The reflection unit of claim 1, wherein a gap exists between the mesh cover layer and the reflection plate. ### Claim 4 (depends on 3) The reflection unit of claim 3, wherein the gap is a liquid channel existing between the mesh cover layer and the reflection plate, so that a liquid flows out of the reflection unit via the liquid channel. ### Claim 5 (depends on 3) The reflection unit of claim 3, wherein an edge of the mesh cover layer is provided with an edge portion with a preset width, the edge portion is in contact with the reflection plate, and a thickness of the edge portion is greater than that of the mesh cover layer, so that the gap forms between the mesh cover layer and the reflection plate. ### Claim 6 (depends on 5) The reflection unit of claim 5, wherein the edge portion is divided into a plurality of first edge parts and a plurality of second edge parts, thicknesses of the first edge parts and the second edge parts are different, the thicknesses of the first edge parts and the second edge parts are larger than that of the mesh cover layer, and the first edge parts and the second edge parts are arranged at intervals. ### Claim 7 (depends on 1) The reflection unit of claim 1, wherein the mesh cover layer is made of a material with high reflectivity to ultrasonic waves. ### Claim 8 (depends on 1) The reflection unit of claim 1, wherein the mesh cover layer is made of a metal material. ### Claim 9 (depends on 1) The reflection unit of claim 1, wherein the mesh cover layer is made of a water-impregnated material. ### Claim 10 (depends on 1) The reflection unit of claim 1, wherein an area of the mesh cover layer is less than or equal to an area of the reflection plate. ### Claim 11 (depends on 1) The reflection unit of claim 1, wherein the mesh cover layer is provided with at least two fixed points and the fixed points are configured to adhere and/or weld the mesh cover layer on the reflection plate. ### Claim 12 (depends on 11) The reflection unit of claim 11, wherein a support column is further provided on the upper surface of the reflection plate and the support column is configured to connect the reflection plate with the ultrasonic anemometer. ### Claim 13 (depends on 11) The reflection unit of claim 11, wherein the fixed points are provided on the edge portion of the mesh cover layer. ### Claim 14 (depends on 1) An ultrasonic anemometer, comprising the reflection unit of claim 1.