# US 11,994,435 B2 · Pressure-sensitive sensor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,994,435 B2 - Document ID: US11994435B2 - Status: Granted - Kind: B2 - Application number: 17/414,739 - Filed: 2019-10-15 - Published: 2022-03-10 - Granted: 2024-05-28 - Earliest claimed: 2019-02-06 - Assignees: Takano Co., Ltd. - Applicants: Takano Co., Ltd. - Inventors: Yoshiro Koga - Web page: https://patentgrep.com/patent/US11994435B2 ## CPC - G01L 1/205: {using distributed sensing elements} - G01L 1/2287: {constructional details of the strain gauges (adjustable resistors H01C10/00)} - G01L: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G) ## Abstract A pressure-sensitive sensor is capable of measuring pressure distribution over a wide range, measuring pressure consistently in a state of surface contact, and enhancing pressure measurement accuracy in each area of intersection. A pressure-sensitive sensor includes a conductive cloth having a mixture of conductive carbon black and a binder resin applied thereto, a first-electrode cloth disposed on a first-surface of the conductive cloth, and a second-electrode cloth disposed on a second-surface of the conductive cloth, wherein areas of intersection between the first-electrode cloth and second-electrode cloth are formed so as to have a matrix structure, courses or wales of the first-electrode cloth are arranged so as to be parallel or orthogonal to courses or wales of the conductive cloth, and courses or wales of the second-electrode cloth are arranged so as to be parallel or orthogonal to the courses or wales of the conductive cloth. ## Claims ### Claim 1 A pressure-sensitive sensor comprising: a conductive cloth having a mixture of conductive carbon black and a binder resin applied thereto; a first-electrode cloth disposed on a first-surface of the conductive cloth; and a second-electrode cloth disposed on a second-surface of the conductive cloth, wherein the conductive cloth is a knitted fabric composed of non-conducting fiber yarns, the first-conductive cloth is a knitted fabric in which a plurality of first-electrodes composed of conducting fiber yarns are formed at first-intervals, the second-conductive cloth is a knitted fabric in which a plurality of second-electrodes composed of conducting fiber yarns are formed at second-intervals, and the first-electrodes and the second-electrodes are arranged in a direction intersecting with each other, or wherein the conductive cloth is a knitted fabric composed of non-conducting fiber yarns, the first-electrode cloths and the second-electrode cloths are knitted fabrics composed of conducting fiber yarns, the first-electrode cloths and the second-electrode cloths are arranged in directions intersecting with each other, and areas of intersection between the first electrode cloths and second electrode cloths are formed so as to have a matrix structure, and wherein courses or wales of the first-electrode cloth are arranged so as to be parallel or orthogonal to courses or wales of the conductive cloth, and courses or wales of the second-electrode cloth are arranged so as to be parallel or orthogonal to the courses or wales of the conductive cloth. ### Claim 2 (depends on 1) The pressure-sensitive sensor according to claim 1, wherein the first-electrode cloth and the second-electrode cloth are the same knitted fabrics. ### Claim 3 (depends on 1) The pressure-sensitive sensor according to claim 1, wherein a contact surface of the first-electrode cloth which contacts the conductive cloth and a contact surface of the second-electrode cloth which contacts the conductive cloth have the same knitting patterns. ### Claim 4 (depends on 1) The pressure-sensitive sensor according to claim 1, wherein a contact surface of the conductive cloth which contacts the first-electrode cloth and a contact surface of the first-electrode cloth which contacts the conductive cloth have the same knitting patterns, and a contact surface of the conductive cloth which contacts the second-electrode cloth and a contact surface of the second-electrode cloth which contacts the conductive cloth have the same knitting patterns. ### Claim 5 (depends on 1) The pressure-sensitive sensor according to claim 1, wherein a contact surface of the first-electrode cloth which contacts the conductive cloth and the opposite surface thereof have different knitting patterns, a contact surface of the second-electrode cloth which contacts the conductive cloth and the opposite surface thereof have different knitting patterns, and the contact surface of the first-electrode cloth which contacts the conductive cloth and the contact surface of the second-electrode cloth which contacts the conductive cloth have the same knitting patterns. ### Claim 6 (depends on 1) The pressure-sensitive sensor according to claim 1, wherein a pitch of loops in the courses or wales of the first-electrode cloth is set to twice the size of a loop diameter or less, a pitch of loops in the courses or wales of the second-electrode cloth is set to twice the size of a loop diameter or less, and a pitch of loops in the courses or wales of the conductive cloth is set to twice the size of a loop diameter or less. ### Claim 7 (depends on 1) The pressure-sensitive sensor according to claim 1, wherein the non-conducting fiber yarns is a synthetic yarn including at least any one of polyester, polyamide, nylon, rayon, acrylic and polyurethane, and the conducting fiber yarns is a covered yarn in which a synthetic core yarn including at least any one of polyamide, nylon, rayon, acrylic and polyurethan is covered with a yarn, which is formed by coating a polyester yarn, polyamide yarn or nylon yarn with silver, or a wooly-processed yarn, which is formed by coating a polyester yarn, polyamide yarn or nylon yarn with silver and being wooly-processed. ### Claim 8 (depends on 1) The pressure-sensitive sensor according to claim 1, wherein the conductive carbon black has an average particle diameter of the primary particles being 100 nm or less. ### Claim 9 (depends on 1) The pressure-sensitive sensor according to claim 1, wherein a weight of the conductive carbon black with respect to that of the conductive cloth is 1% to 5%. ### Claim 10 (depends on 1) The pressure-sensitive sensor according to claim 1, further comprising sewing threads, wherein the first-electrode cloth is sewn to the conductive cloth with the sewing threads, and the second-electrode cloth is sewn to the conductive cloth with the sewing threads.