A measuring device includes a measure, a reel around which the measure is wound, the reel rotating according to pulling-out of the measure and being provided with a code pattern that changes along a rotation direction, a reader configured to optically read the code pattern, and a calculator configured to calculate a measurement value of the measure from a reading result by the reader.

A measuring device includes a measure, a reel around which the measure is wound, the reel rotating according to pulling-out of the measure and being provided with a code pattern that changes along a rotation direction, a reader configured to optically read the code pattern, and a calculator configured to calculate a measurement value of the measure from a reading result by the reader.

A Bluetooth-enabled tape measuring system, a cooperating mobile or desktop application, and a method for using same. A tape measure with retractable tape stores each measurement taken and transmits the measurement to a computing device for automatic recordation and association with the object of the measurement, which can be a user-input floor plan or the like. A software solution at the computing device is capable of planning necessary measurements, receiving transmitted measurements from the tape measure, and automatically associating received measurements with the user-input characteristics. The system may also direct the user to make certain measurements based on a user-stated project.

A digital measuring tape includes a shell body, a tape, and a tape spool. A coiling shaft is provided inside the shell body. The tape spool is installed on the coiling shaft for rotating with respect to the coiling shaft. The tape is coiled around the tape spool, and a front end of the tape is provided with a hook. The digital measuring tape further includes a grid dial, a grid detector, a circuit board, and a display screen. The grid dial is fixed on the tape spool for rotating. A circumferential edge of the grid dial is provided with a plurality of grids. Rotation of the grid dial and the grids enables the grid detector to produce a detecting signal of rotation of the grid dial. With the detecting signal, a length of the pulled tape is calculated through the circuit board, and displayed on the display screen.

A digital measuring tape includes a shell body, a tape, and a tape spool. A coiling shaft is provided inside the shell body. The tape spool is installed on the coiling shaft for rotating with respect to the coiling shaft. The tape is coiled around the tape spool, and a front end of the tape is provided with a hook. The digital measuring tape further includes a grid dial, a grid detector, a circuit board, and a display screen. The grid dial is fixed on the tape spool for rotating. A circumferential edge of the grid dial is provided with a plurality of grids. Rotation of the grid dial and the grids enables the grid detector to produce a detecting signal of rotation of the grid dial. With the detecting signal, a length of the pulled tape is calculated through the circuit board, and displayed on the display screen.

A length measurement device comprises: a tape which is wound on a reel received in a case, one end of which is pulled out of the case so as to measure the length of an object, and which has a barcode formed on one surface thereof; a first measurement unit for recognizing the barcode on the tape so as to generate a first measurement value of the length along which the tape is pulled out of the case; a second measurement unit for sensing a rotation angle of the reel so as to generate a second measurement value of the length along which the tape is pulled out of the case; and a control unit for making the first measurement value and the second measurement value mutually compensate for each other so as to convert same into the pulled-out length information of the tape.

Exemplary embodiments relate to a roller tape measure comprising a housing and a flexible measuring tape that is in operative connection with the housing and that includes scale indicia on a surface thereof. The measuring tape extends within an interior area of the housing and includes a length portion that is selectively variably extendable and retractable from the housing interior area. The housing includes a hook in operative connection therewith that is movable between an extended position and a retracted position independently of extension and retraction of the measuring tape. The hook includes a hook bend portion with a measuring edge that extends perpendicular the measuring tape surface to facilitate reading of the scale indicia for measurement. In the extended position of the hook, the hook is configured to engage an article of flexible material to enable a portion of the article to be stretched for measurement.

Exemplary embodiments relate to a roller tape measure comprising a housing and a flexible measuring tape that is in operative connection with the housing and that includes scale indicia on a surface thereof. The measuring tape extends within an interior area of the housing and includes a length portion that is selectively variably extendable and retractable from the housing interior area. The housing includes a hook in operative connection therewith that is movable between an extended position and a retracted position independently of extension and retraction of the measuring tape. The hook includes a hook bend portion with a measuring edge that extends perpendicular the measuring tape surface to facilitate reading of the scale indicia for measurement. In the extended position of the hook, the hook is configured to engage an article of flexible material to enable a portion of the article to be stretched for measurement.

A measuring instrument includes a plurality of first readers that optically read a plurality of patterns from a measure having a color pattern including the plurality of patterns arranged at a regular interval in a length direction, the plurality of first readers being arranged at the regular interval in the length direction, a converter that converts the plurality of patterns read by the plurality of first readers into a value of an N-ary number (N is 3 or more), and a calculator that calculates a scale value of the measure based on data that defines a relationship between the value of the N-ary number and the scale value of the measure.

Generally, a device to measure the circumference of circular objects. Specifically, a device including a pair of slidingly engaged members disposed between a pair of arms configured to be engaged with tread on a tire at about the midline of a wheel, an electrical circuit which varies in output voltage based on the distance between the pair of arms, and a processor communicatively coupled to a non-transitory computer readable medium containing a program which correlates the output voltage of the electrical circuit to a unit measure of distance between the pair of arms and calculates tire circumference.