A cable measurement system and cutter apparatus has a housing, a display device, a material conduit, a rotary encoder, a cutting tool handle a resistance member a movable cutting blade and a blade aperture. The cutter system is able to measure the length of a cable that passes through the material conduit which traverses through the housing. The display device is mounted onto the housing and is coupled to the rotary encoder which measures the length of cable passed through the housing. The encoder is mounted next to the conduit so that the cable is measured, and the length is displayed on the display device. one end of the cutting tool handle is rotatably mounted to the housing and the movable blade is mounted onto the opposite end of the handle. The blade is able to cut the cable by moving through the blade aperture which traverses through the conduit.

A sensor unit for measuring a rotational state of a shaft may include a transmission. The transmission may be connected to or configured to connect to the shaft. The transmission may have at least two transmission elements that are in engagement with one another via a toothing. At least one of the at least two transmission elements is a gearwheel whose rotation about a rotational axis is detected by a sensor. The at least one gearwheel and the toothing arrangement of the at least one gearwheel may be formed by a printed circuit board. A track may be arranged on an end side of the gearwheel that faces the sensor, and the sensor may scan the track to measure a rotational state of the gearwheel about the rotational axis.

A sensor unit for measuring a rotational state of a shaft may include a transmission. The transmission may be connected to or configured to connect to the shaft. The transmission may have at least two transmission elements that are in engagement with one another via a toothing. At least one of the at least two transmission elements is a gearwheel whose rotation about a rotational axis is detected by a sensor. The at least one gearwheel and the toothing arrangement of the at least one gearwheel may be formed by a printed circuit board. A track may be arranged on an end side of the gearwheel that faces the sensor, and the sensor may scan the track to measure a rotational state of the gearwheel about the rotational axis.

A rotational angle detection device includes: a main driving gear; two driven gears; two sensors that detect the respective rotational angles of the two driven gears; and a computation circuit configured to compute the rotational angle of the main driving gear based on the respective rotational angles of the two driven gears. The computation circuit includes a difference computation circuit and a wear detection circuit. The difference computation circuit is configured to compute a first difference. The wear detection circuit is configured to detect wear of the two driven gears through a comparison between a value of the first difference that is computed by the difference computation circuit and a first ideal value.

A rotational angle detection device includes: a main driving gear; two driven gears; two sensors that detect the respective rotational angles of the two driven gears; and a computation circuit configured to compute the rotational angle of the main driving gear based on the respective rotational angles of the two driven gears. The computation circuit includes a difference computation circuit and a wear detection circuit. The difference computation circuit is configured to compute a first difference. The wear detection circuit is configured to detect wear of the two driven gears through a comparison between a value of the first difference that is computed by the difference computation circuit and a first ideal value.

Provided is a method for more accurately correcting position coordinates of a point on an object to be imaged, the coordinates being identified based on values detected by linear scales. A visual field is moved to a measurement point defined on a recessed portion formed on a calibration plate, and an image is captured (step S13-1), edges are detected from an image of sides of the recessed portion (step 313-2), an intersection of the edges is calculated (step S13-3), values of the intersection as actually measured by the linear scales are saved (step S13-4), and position coordinates of the point on the object to be imaged as detected by the linear scales are corrected by using a true value and a difference.

Provided is a method for more accurately correcting position coordinates of a point on an object to be imaged, the coordinates being identified based on values detected by linear scales. A visual field is moved to a measurement point defined on a recessed portion formed on a calibration plate, and an image is captured (step S13-1), edges are detected from an image of sides of the recessed portion (step 313-2), an intersection of the edges is calculated (step S13-3), values of the intersection as actually measured by the linear scales are saved (step S13-4), and position coordinates of the point on the object to be imaged as detected by the linear scales are corrected by using a true value and a difference.

A multi-turn measurement system includes a plurality of gears, a plurality of pinions engaging the plurality of gears, a plurality of magnets each disposed on one of the plurality of gears, and a plurality of magnetic field sensors. Rotation of the pinions about a center axis drives rotation of the plurality of gears. The magnets each have a magnetic field that changes based on an angular position of the one of the plurality of gears. The magnetic field sensors are each positioned to sense the magnetic field of one of the plurality of magnets.

A multi-turn measurement system includes a plurality of gears, a plurality of pinions engaging the plurality of gears, a plurality of magnets each disposed on one of the plurality of gears, and a plurality of magnetic field sensors. Rotation of the pinions about a center axis drives rotation of the plurality of gears. The magnets each have a magnetic field that changes based on an angular position of the one of the plurality of gears. The magnetic field sensors are each positioned to sense the magnetic field of one of the plurality of magnets.

A method and system to measure a parameter associated with a component, device, or system with a specified accuracy, including: providing one or more sensors operably disposed to detect the parameter; obtaining a coarse measurement of the parameter within a first range using the one or more sensors, wherein the first range includes minimum and maximum values for the parameter; obtaining a fine measurement of the parameter within a second range using the one or more sensors, wherein the second range is smaller than the first range and has a specified ratio to the first range that provides the specified accuracy; determining a current value of the parameter by combining the coarse and fine measurements; and providing the current value of the parameter to a communications interface, a storage device, a display, a control panel, a processor, a programmable logic controller, or an external device.