A screw thread measurement system and methods may comprise a frame having a reference surface, a carrier coupled to the frame and configured to translate relative to the frame, a dimension measurement system coupled to the carrier and having a thread contact element configured to translate relative to the frame and orthogonally the translation axis of the carrier. The dimension measurement system configured to determine thread dimensions relative to the frame reference surface.

An electronic position encoder includes a scale comprising a pattern track having a track width dimension along a y-axis direction that is perpendicular to an x-axis measuring axis direction, a detector, and a signal processing configuration. The detector includes a field generating coil configuration fixed on a multi-layer printed circuit board (PCB), including a field generating coil portion that surrounds an interior area aligned with the pattern track and includes first and second elongated portions having a trace width along the y-axis direction, which is at least 0.1 times a y-axis width of the interior area. The detector includes conductive receiver loops arranged along the x-axis direction and fixed on the PCB. The first and second elongated portions are fabricated using at least an interior copper layer of the PCB, and the conductive receiver loops are fabricated using at least one copper layer that is closer than the interior copper layer to a front surface of the detector that faces the scale pattern.

A device configured to provide a faster and more accurate measurement of depths of holes for placement of bone screws and fastener for bone implant fixation procedures. The device includes a combination of a bone probe for physical examination of a hole drilled in a bone and a depth gauge member for determining a depth of the hole and providing digital measurement of the depth via a display on the instrument and/or via a wireless exchange of measurement data to a remote computing device, such as a tablet or smartphone. The device may further be connected to a separate neuromonitoring device and be used for nerve sensing and/or nerve stimulation by way of the bone probe. For example, the bone probe may include a conductive material such that the distal probe tip acts as an extension of the neuromonitoring device and may be used to sense and/or stimulate nerves.

A device configured to provide a faster and more accurate measurement of depths of holes for placement of bone screws and fastener for bone implant fixation procedures. The device includes a combination of a bone probe for physical examination of a hole drilled in a bone and a depth gauge member for determining a depth of the hole and providing digital measurement of the depth via a display on the instrument and/or via a wireless exchange of measurement data to a remote computing device, such as a tablet or smartphone. The device may further be connected to a separate neuromonitoring device and be used for nerve sensing and/or nerve stimulation by way of the bone probe. For example, the bone probe may include a conductive material such that the distal probe tip acts as an extension of the neuromonitoring device and may be used to sense and/or stimulate nerves.

An electronic position encoder includes a scale comprising a first pattern track of signal modulating elements (SME) periodically arranged at a wavelength .sub.1 and a second pattern track of SME periodically arranged at a wavelength .sub.2, a detector, and a signal processing configuration. The detector includes a field generating coil configuration, a first set of sensing elements configured to provide detector signals based on the first pattern track, and a second set of sensing elements configured to provide detector signals based on the second pattern track. The first set of sensing elements include a first spatial phase subset of sensing elements and a second spatial phase subset of sensing elements that are connected to the signal processing configuration via at least a first pair and a second pair of connection lines that include respective crossover segments that extend across or overlap the second pattern track. The respective crossover segments are positioned at locations spaced apart along a measuring axis direction by a distance N*.sub.2, where N is an integer.

An inductive sensor device has a scale with scale elements that provide a field pattern in at least one line extending in a measuring direction. The inductive sensor device contains at least one receive circuit with at least one receive coil. The receive coil and the scale are moveable relative to each other in the measuring direction. The receive coil extends from a first end to a second end in the measuring direction. It has a first end section directly adjacent to the first end and a second end section directly adjacent to the second end, and middle section. Each of the sections contains at least one loop of the receive coil. In the end sections the loop area decreases from loop to loop from the loop next to the middle section toward the respective end. Such a loop design compensates for misalignments between the receive coil and the scale.

Smart Scale Ruler is an electronic architect's scale having a triangular shaped ruler body. The Smart Scale Ruler has a changeable electronic display for displaying a custom or the desired scale of any unit of length, for a document or plan. A set of depressible buttons function as the inputs for the value of the reference point a user wishes to base the custom scale off of, as well as different settings for the device, in order to display the correct scale on the electronic display.

A digital display measuring instrument having an out-of-tolerance warning device includes: a digital display measurer, a processor arranged in the digital display measurer, and an out-of-tolerance warning device. The processor is configured to calculate a difference between a measured value of the digital display measurer and a preset reference value, and the out-of-tolerance warning device is configured to receive signals of the processor and output a warning in response to a calculation result of the processor. With the digital display measuring instrument, it is only required to measure the size of the to-be-detected member, and it may be determined whether the size of the to-be-detected member meets a requirement by referring to an output of the out-of-tolerance warning device.

An inductive type position encoder includes a scale, a detector portion and a signal processor. The scale includes a periodic pattern of signal modulating elements (SME) arranged along a measuring axis, with a spatial wavelength W1. One type of SME in the pattern comprises similar conductive plates or loops. The detector portion comprises sensing elements and a field generating coil that generates a changing magnetic flux. The sensing elements may comprise conductive loop portions arranged along the measuring axis and configured to provide detector signals which respond to a local effect on the changing magnetic flux provided by adjacent SME's. In various implementations, the first type of SMEs have an average dimension DSME along the measuring axis direction that is greater than DSEN and at least .55*W1 and at most 0.8*W1, which provides advantageous detector signal characteristics.

An electronic position encoder includes a scale comprising a first pattern track of signal modulating elements (SME) periodically arranged at a wavelength .sub.1 and a second pattern track of SME periodically arranged at a wavelength .sub.2, a detector, and a signal processing configuration. The detector includes a field generating coil configuration, a first set of sensing elements configured to provide detector signals based on the first pattern track, and a second set of sensing elements configured to provide detector signals based on the second pattern track. The first set of sensing elements include a first spatial phase subset of sensing elements and a second spatial phase subset of sensing elements that are connected to the signal processing configuration via at least a first pair and a second pair of connection lines that include respective crossover segments that extend across or overlap the second pattern track. The respective crossover segments are positioned at locations spaced apart along a measuring axis direction by a distance N*.sub.2, where N is an integer.