# US 10,502,647 B2 · Apparatus for measuring underwater pressure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,502,647 B2 - Document ID: US10502647B2 - Status: Granted - Kind: B2 - Application number: 15/740,464 - Filed: 2017-02-14 - Published: 2018-12-27 - Granted: 2019-12-10 - Earliest claimed: 2017-02-14 - Assignees: Korea Institute of Ocean Science & Technology - Applicants: Korea Institute of Ocean Science & Technology - Inventors: Chang Joo Shin; Jung Min Seo; O Soon Kwon; Won Dae Baek - Web page: https://patentgrep.com/patent/US10502647B2 ## CPC - G01L 7/04: in the form of flexible, deformable tubes, e.g. Bourdon gauges - G01L 19/0023: {for flowthrough systems having a flexible pressure transmitting element} - G01L 19/06: Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa - G01L 19/0636: {using particle filters} - G01N 1/16: with provision for intake at several levels ({G01N1/2035} G01N1/12, G01N1/14 take precedence) - G01L: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G) - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) ## Abstract According to the present disclosure, at least two fluid inlet/outlet pipes, each of which is provided with a filter, are installed outside a structure to be bent and an end of each of the fluid inlet/outlet pipes is connected to a pressure sensor provided on the structure. Thus, since a fluid in the state in which low-frequency and high-frequency components of the disturbances generated outside the structure are removed therefrom acts on the pressure sensor, the underwater pressure sensing apparatus is capable of measuring fluid pressure in a stable state. ## Claims ### Claim 1 An underwater pressure measurement apparatus for measuring pressure under water, the apparatus comprising: a structure having a configuration in which an interior and an exterior are separated from each other such that inflow of a fluid is blocked; a pressure sensor configured to measure pressure of the fluid and installed inside the structure; and two or more fluid inlet/outlet pipes, each formed in a hollow shape such that the fluid flows into or flows out of the two or more fluid inlet/outlet pipes, each of which is connected, at one end thereof, to the pressure sensor and is provided, at a remaining end, with a filter configured to block inflow of foreign matter and to remove a high-frequency component of a disturbance, the two or more fluid inlet/outlet pipes being made of a bendable material and being disposed outside the structure, wherein when the fluid flowing into the fluid inlet/outlet pipes through the filter acts on the pressure sensor, a high-frequency component and a low-frequency component of the disturbance generated in water are removed while passing through the filter and the fluid inlet/outlet pipes. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the structure includes a cover member configured to open/close the interior thereof, and the pressure sensor is installed on the cover member so that a portion of the pressure sensor is located outside the cover member, and the one end of each of the fluid inlet/outlet pipes is connected to the pressure sensor exposed to the exterior such that the fluid, which flows into and out of the fluid inlet/outlet pipes acts on the pressure sensor. ### Claim 3 (depends on 2) The apparatus of claim 2, wherein the cover member includes a plurality of fixing members configured to fix positions and a bent state of the fluid inlet/outlet pipes and the filter, and each of the fixing members includes a coupling end fastened or fitted to the cover member and a fixing end with a fitting groove configured to fit each of the fluid inlet/outlet pipes or the filter therein. ### Claim 4 (depends on 3) The apparatus of claim 3, wherein each of the fluid inlet/outlet pipes has a low-frequency removing section which is formed by being bent in a curved shape or at a right angle such that the low frequency is removed as the fluid interferes with the low-frequency removing section while flowing into/out of the fluid inlet/outlet pipes. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein each of the fluid inlet/outlet pipes has a low-frequency removing section which is formed by being bent in a curved shape or at a right angle such that the low frequency is removed as the fluid interferes with the low-frequency removing section while flowing into/out of the fluid inlet/outlet pipes. ### Claim 6 (depends on 2) The apparatus of claim 2, wherein each of the fluid inlet/outlet pipes has a low-frequency removing section which is formed by being bent in a curved shape or at a right angle such that the low frequency is removed as the fluid interferes with the low-frequency removing section while flowing into/out of the fluid inlet/outlet pipes. ### Claim 7 (depends on 1) The apparatus of claim 1, wherein the filter is made of at least one material selected from a group consisting of a mesh body, porous sponge, fabric, a porous synthetic resin body, and a porous fiber. ### Claim 8 (depends on 7) The apparatus of claim 7, wherein each of the fluid inlet/outlet pipes has a low-frequency removing section which is formed by being bent in a curved shape or at a right angle such that the low frequency is removed as the fluid interferes with the low-frequency removing section while flowing into/out of the fluid inlet/outlet pipes. ### Claim 9 (depends on 1) The apparatus of claim 1, wherein the filter includes a hollow first connector that is provided and replaceably coupled to the remaining end of each of the fluid inlet/outlet pipes; and a hollow second connector configured to be connected to the first connector by being fastened or fitted to the first connector and coupled to the filter. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein each of the fluid inlet/outlet pipes has a low-frequency removing section which is formed by being bent in a curved shape or at a right angle such that the low frequency is removed as the fluid interferes with the low-frequency removing section while flowing into/out of the fluid inlet/outlet pipes.