# US 11,307,215 B2 · Acceleration sensor core unit, and method for preventing deflection of a base board on which acceleration sensor is mounted > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,307,215 B2 - Document ID: US11307215B2 - Status: Granted - Kind: B2 - Application number: 16/682,162 - Filed: 2019-11-13 - Published: 2020-11-26 - Granted: 2022-04-19 - Earliest claimed: 2019-05-22 - Assignees: Imv Corporation - Applicants: Imv Corporation - Inventors: Toshiyuki Kobayashi; Takao Kawahira - Web page: https://patentgrep.com/patent/US11307215B2 ## CPC - G01P 15/08: with conversion into electric or magnetic values - G01P 1/02: Housings - G01P 1/023: {for acceleration measuring devices} - G01P 15/18: in two or more dimensions - 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 An acceleration sensor core unit 1 includes a circuit board 3 and metallic plates 4, 5. The circuit board 3 is made of an epoxy resin, and an acceleration sensor 11 for detecting vibration acceleration in an arrow 105 direction is mounted thereon. The circuit board 3 is sandwiched between the metallic plates 4, 5. Ring-shaped metallic spacers 7a to 7c and ring-shaped metallic spacers 8a to 8c are respectively interposed between the circuit board 3 and the metallic plate 4 and between the circuit board 3 and the metallic plate 5. The circuit board 3 is screwed to each of the metallic plates 4, 5 at three positions. Thus, it is possible to reliably fix the circuit board 3 to the metallic plates 4, 5 with a small attachment space. In this way, rigidity as the acceleration sensor core unit 1 can be secured. ## Claims ### Claim 1 An acceleration sensor core unit configured to detect vibration acceleration at frequencies of 10 KHz or higher comprising: a base board having a surface on which an acceleration sensor is mounted; a first metallic reinforcing plate that is rigidly fixed to the surface of the base board via at least one metallic space forming member so as to suppress a deflection of the base board at frequencies of 10 KHz or higher; and a second metallic reinforcing plate that is rigidly fixed to a back surface of the base board via at least one metallic space forming member so as to suppress the deflection of the base board at frequencies of 10 KHz or higher, wherein the base board is located between the first metallic reinforcing plate and the second metallic reinforcing plate. ### Claim 2 (depends on 1) The acceleration sensor core unit according to claim 1, wherein the first and second reinforcing plates are parallel with the base board. ### Claim 3 (depends on 1) The acceleration sensor core unit according to claim 1, wherein the first and second reinforcing plates are each fixed to the base board at three positions. ### Claim 4 (depends on 2) The acceleration sensor core unit according to claim 2, wherein the first and second reinforcing plates are each fixed to the base board at three positions. ### Claim 5 (depends on 1) The acceleration sensor core unit according to claim 1, wherein the sensor detects acceleration in a parallel direction with the base board. ### Claim 6 (depends on 2) The acceleration sensor core unit according to claim 2, wherein the sensor detects acceleration in a parallel direction with the base board. ### Claim 7 (depends on 3) The acceleration sensor core unit according to claim 3, wherein the sensor detects acceleration in a parallel direction with the base board. ### Claim 8 (depends on 4) The acceleration sensor core unit according to claim 4, wherein the sensor detects acceleration in a parallel direction with the base board. ### Claim 9 (depends on 1) An acceleration sensor pick-up comprising: the acceleration sensor core unit according to claim 1; and a casing that stores the acceleration sensor core. ### Claim 10 (depends on 9) The acceleration sensor pick-up according to claim 9, wherein the first and second reinforcing plates are parallel with the base board. ### Claim 11 (depends on 9) The acceleration sensor pick-up according to claim 9, wherein the first and second reinforcing plates are each fixed to the base board at three positions. ### Claim 12 (depends on 10) The acceleration sensor pick-up according to claim 10, wherein the first and second reinforcing plates are each fixed to the base board at three positions. ### Claim 13 (depends on 9) The acceleration sensor pick-up according to claim 9, wherein the sensor detects acceleration in a parallel direction with the base board. ### Claim 14 (depends on 10) The acceleration sensor pick-up according to claim 10, wherein the sensor detects acceleration in a parallel direction with the base board. ### Claim 15 (depends on 11) The acceleration sensor pick-up according to claim 11, wherein the sensor detects acceleration in a parallel direction with the base board. ### Claim 16 (depends on 12) The acceleration sensor pick-up according to claim 12, wherein the sensor detects acceleration in a parallel direction with the base board. ### Claim 17 A deflection prevention method for preventing a deflection of a base board having a surface on which an acceleration sensor is mounted, the sensor detecting vibration acceleration at frequency of 10 KHz or higher, the deflection prevention method comprising: rigidly fixing a first ridged metallic reinforcing plate, which suppresses the deflection of the base board at frequency of 10 KHz or higher, to the surface of the base board via at least one space forming member; and rigidly fixing a second ridged metallic reinforcing plate, which suppresses the deflection of the base board at frequency of 10 KHz or higher, to a back surface of the base board via at least one space forming member such that the base board is between the first ridged metallic reinforcing plate and the second ridged metallic reinforcing plate. ### Claim 18 (depends on 17) The deflection prevention method according to claim 17, wherein the first and second reinforcing plates are parallel with the base board. ### Claim 19 (depends on 17) The deflection prevention method according to claim 17, wherein the first and second reinforcing plates are each fixed to the base board at three positions. ### Claim 20 (depends on 17) The deflection prevention method according to claim 17, wherein the sensor detects acceleration in a parallel direction with the base board.