# US 11,774,893 B2 · Measurement device and image forming apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,774,893 B2 - Document ID: US11774893B2 - Status: Granted - Kind: B2 - Application number: 17/458,565 - Filed: 2021-08-27 - Published: 2022-11-24 - Granted: 2023-10-03 - Earliest claimed: 2021-05-20 - Assignees: FUJIFILM Business Innovation Corp. - Applicants: FUJIFILM Business Innovation Corp. - Inventors: Kenta Ogata; Kouhei Yukawa - Web page: https://patentgrep.com/patent/US11774893B2 ## CPC - B41J 11/0095: {Detecting means for copy material, e.g. for detecting or sensing presence of copy material or its leading or trailing end} - G03G 15/5029: {by measuring the copy material characteristics, e.g. weight, thickness} - G01N 27/045: {Circuits (measuring resistance per se G01R27/00, e.g. G01R27/22)} - G03G 2215/00616: Optical detector - G03G 2215/00637: Acoustic detector - G03G 2215/00717: Detection of physical properties - G03G 2215/00742: of sheet weight - G03G 2215/00763: of sheet resistivity - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY - 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 A measurement device includes: a resistance measurement unit that measures an electrical resistance of a measurement target; a first measurement unit, including a detector that detects information indicating a first physical property other than the electrical resistance of the measurement target, that measures the first physical property from a detection result from the detector; a second measurement unit, including a detector that detects information indicating a second physical property other than the electrical resistance and the first physical property of the measurement target, that measures the second physical property from a detection result from the detector, in which a length of time from a start of driving the detector until a start of actual measurement is longer in the second measurement unit than in the first measurement unit; and a control unit that performs first control causing the first measurement unit to execute a measurement operation of measuring the first physical property in parallel with a measurement operation by the resistance measurement unit, and performs second control causing the second measurement unit to execute a measurement operation of measuring the second physical property in parallel with the measurement operation by the resistance measurement unit and also causing the second measurement unit to start the driving of the detector in the second measurement unit before the start of the driving of the detector in the first measurement unit. ## Claims ### Claim 1 A measurement device comprising: a resistance measurement unit that measures an electrical resistance of a measurement target; a first measurement unit, including a first detector that detects information indicating a first physical property other than the electrical resistance of the measurement target, that measures the first physical property from a first detection result from the first detector; a second measurement unit, including a second detector that detects information indicating a second physical property other than the electrical resistance and the first physical property of the measurement target, that measures the second physical property from a second detection result from the second detector, in which a length of time from a start of driving the second detector until a start of actual measurement in the second measurement unit is longer than a length of time from a start of driving the first detector until a start of actual measurement in the first measurement unit; and a control unit that performs first control causing the first measurement unit to execute a measurement operation of measuring the first physical property in parallel with a measurement operation by the resistance measurement unit, and performs second control causing the second measurement unit to execute a measurement operation of measuring the second physical property in parallel with the measurement operation by the resistance measurement unit and also causing the second measurement unit to start the driving of the second detector in the second measurement unit before the start of the driving of the first detector in the first measurement unit. ### Claim 2 (depends on 1) The measurement device according to claim 1, wherein: the resistance measurement unit includes a plurality of measurement modes used in actual measurement of the electrical resistance of the measurement target, and the control unit controls at least one of the first measurement unit and the second measurement unit to execute actual measurement in a stopped period during which the resistance measurement unit stops actual measurement of the electrical resistance between the plurality of measurement modes. ### Claim 3 (depends on 2) The measurement device according to claim 2, wherein: the control unit controls the measurement unit disposed at a position nearer the resistance measurement unit from among the first measurement unit and the second measurement unit to execute actual measurement in the stopped period. ### Claim 4 (depends on 3) The measurement device according to claim 3, wherein: the control unit controls the first measurement unit to start driving the first detector in the first measurement unit after the start of the driving of the second detector and before the end of actual measurement in the second measurement unit. ### Claim 5 (depends on 4) The measurement device according to claim 4, wherein: the control unit controls the first measurement unit to start driving the first detector in the first measurement unit after the start of the driving of the second detector and before the start of actual measurement in the second measurement unit. ### Claim 6 (depends on 5) The measurement device according to claim 5, wherein: the resistance measurement unit includes a third detector that detects information indicating the electrical resistance of the measurement target, the third detector of the resistance measurement unit, the first detector of the first measurement unit, and the second detector of the second measurement unit are disposed in the above order in a movement direction of a moving measurement target, and the control unit includes: a first mode that performs the first control on the first measurement unit and also performs the second control on the second measurement unit, and a second mode that causes the measurement operations of the resistance measurement unit, the first measurement unit, and the second measurement unit to be executed serially in the order in which the third detector of the resistance measurement unit, the first detector of the first measurement unit, and the second detector of the second measurement unit are disposed in the movement direction. ### Claim 7 (depends on 4) The measurement device according to claim 4, wherein: the resistance measurement unit includes a third detector that detects information indicating the electrical resistance of the measurement target, the third detector of the resistance measurement unit, the first detector of the first measurement unit, and the second detector of the second measurement unit are disposed in the above order in a movement direction of a moving measurement target, and the control unit includes: a first mode that performs the first control on the first measurement unit and also performs the second control on the second measurement unit, and a second mode that causes the measurement operations of the resistance measurement unit, the first measurement unit, and the second measurement unit to be executed serially in the order in which the third detector of the resistance measurement unit, the first detector of the first measurement unit, and the second detector of the second measurement unit are disposed in the movement direction. ### Claim 8 (depends on 3) The measurement device according to claim 3, wherein: the resistance measurement unit includes a third detector that detects information indicating the electrical resistance of the measurement target, the third detector of the resistance measurement unit, the first detector of the first measurement unit, and the second detector of the second measurement unit are disposed in the above order in a movement direction of a moving measurement target, and the control unit includes: a first mode that performs the first control on the first measurement unit and also performs the second control on the second measurement unit, and a second mode that causes the measurement operations of the resistance measurement unit, the first measurement unit, and the second measurement unit to be executed serially in the order in which the third detector of the resistance measurement unit, the first detector of the first measurement unit, and the second detector of the second measurement unit are disposed in the movement direction. ### Claim 9 (depends on 2) The measurement device according to claim 2, wherein: the control unit controls the first measurement unit to start driving the first detector in the first measurement unit after the start of the driving of the second detector and before the end of actual measurement in the second measurement unit. ### Claim 10 (depends on 9) The measurement device according to claim 9, wherein: the control unit controls the first measurement unit to start driving the first detector in the first measurement unit after the start of the driving of the second detector and before the start of actual measurement in the second measurement unit. ### Claim 11 (depends on 10) The measurement device according to claim 10, wherein: the resistance measurement unit includes a third detector that detects information indicating the electrical resistance of the measurement target, the third detector of the resistance measurement unit, the first detector of the first measurement unit, and the second detector of the second measurement unit are disposed in the above order in a movement direction of a moving measurement target, and the control unit includes: a first mode that performs the first control on the first measurement unit and also performs the second control on the second measurement unit, and a second mode that causes the measurement operations of the resistance measurement unit, the first measurement unit, and the second measurement unit to be executed serially in the order in which the third detector of the resistance measurement unit, the first detector of the first measurement unit, and the second detector of the second measurement unit are disposed in the movement direction. ### Claim 12 (depends on 9) The measurement device according to claim 9, wherein: the resistance measurement unit includes a third detector that detects information indicating the electrical resistance of the measurement target, the third detector of the resistance measurement unit, the first detector of the first measurement unit, and the second detector of the second measurement unit are disposed in the above order in a movement direction of a moving measurement target, and the control unit includes: a first mode that performs the first control on the first measurement unit and also performs the second control on the second measurement unit, and a second mode that causes the measurement operations of the resistance measurement unit, the first measurement unit, and the second measurement unit to be executed serially in the order in which the third detector of the resistance measurement unit, the first detector of the first measurement unit, and the second detector of the second measurement unit are disposed in the movement direction. ### Claim 13 (depends on 2) The measurement device according to claim 2, wherein: the resistance measurement unit includes a third detector that detects information indicating the electrical resistance of the measurement target, the third detector of the resistance measurement unit, the first detector of the first measurement unit, and the second detector of the second measurement unit are disposed in the above order in a movement direction of a moving measurement target, and the control unit includes: a first mode that performs the first control on the first measurement unit and also performs the second control on the second measurement unit, and a second mode that causes the measurement operations of the resistance measurement unit, the first measurement unit, and the second measurement unit to be executed serially in the order in which the third detector of the resistance measurement unit, the first detector of the first measurement unit, and the second detector of the second measurement unit are disposed in the movement direction. ### Claim 14 (depends on 1) The measurement device according to claim 1, wherein: the control unit controls the first measurement unit to start driving the first detector in the first measurement unit after the start of the driving of the second detector and before the end of actual measurement in the second measurement unit. ### Claim 15 (depends on 14) The measurement device according to claim 14, wherein: the control unit controls the first measurement unit to start driving the first detector in the first measurement unit after the start of the driving of the second detector and before the start of actual measurement in the second measurement unit. ### Claim 16 (depends on 15) The measurement device according to claim 15, wherein: the resistance measurement unit includes a third detector that detects information indicating the electrical resistance of the measurement target, the third detector of the resistance measurement unit, the first detector of the first measurement unit, and the second detector of the second measurement unit are disposed in the above order in a movement direction of a moving measurement target, and the control unit includes: a first mode that performs the first control on the first measurement unit and also performs the second control on the second measurement unit, and a second mode that causes the measurement operations of the resistance measurement unit, the first measurement unit, and the second measurement unit to be executed serially in the order in which the third detector of the resistance measurement unit, the first detector of the first measurement unit, and the second detector of the second measurement unit are disposed in the movement direction. ### Claim 17 (depends on 14) The measurement device according to claim 14, wherein: the resistance measurement unit includes a third detector that detects information indicating the electrical resistance of the measurement target, the third detector of the resistance measurement unit, the first detector of the first measurement unit, and the second detector of the second measurement unit are disposed in the above order in a movement direction of a moving measurement target, and the control unit includes: a first mode that performs the first control on the first measurement unit and also performs the second control on the second measurement unit, and a second mode that causes the measurement operations of the resistance measurement unit, the first measurement unit, and the second measurement unit to be executed serially in the order in which the third detector of the resistance measurement unit, the first detector of the first measurement unit, and the second detector of the second measurement unit are disposed in the movement direction. ### Claim 18 (depends on 1) The measurement device according to claim 1, wherein: the resistance measurement unit includes a third detector that detects information indicating the electrical resistance of the measurement target, the third detector of the resistance measurement unit, the first detector of the first measurement unit, and the second detector of the second measurement unit are disposed in the above order in a movement direction of a moving measurement target, and the control unit includes: a first mode that performs the first control on the first measurement unit and also performs the second control on the second measurement unit; and a second mode that causes the measurement operations of the resistance measurement unit, the first measurement unit, and the second measurement unit to be executed serially in the order in which the third detector of the resistance measurement unit, the first detector of the first measurement unit, and the second detector of the second measurement unit are disposed in the movement direction. ### Claim 19 (depends on 1) The measurement device according to claim 1, wherein: the first measurement unit emits an ultrasonic wave at the measurement target to measure a basis weight as the first physical property of the measurement target, and the control unit includes: one mode that performs the first control on the first measurement unit and also performs the second control on the second measurement unit, and another mode that controls the first measurement unit to execute the measurement operation of measuring the basis weight. ### Claim 20 (depends on 1) An image forming apparatus comprising: the measurement device according to claim 1; an image forming unit that forms an image on a recording medium treated as the measurement target for which the electrical resistance, the first physical property, and the second physical property are measured by the measurement device; and a control device that controls an image forming operation by the image forming unit on a basis of the electrical resistance, the first physical property, and the second physical property measured by the measurement device.