Abstract: Removable handgun slide mounts are presented including: a mounting plate; a dovetail mounting adapter sized to slidingly couple with a rear open sight dovetail slot of a handgun slide and configured to removably coupled with the mounting plate; and a rear slide mounting adapter sized to slidingly couple with a rear opening of the handgun slide and configured to removably couple with the mounting plate. In some embodiments, the mounting plate includes: at least two locating posts for locating a rear sight; at least one threaded hole for receiving a threaded screw to couple the rear sight with the mounting plate; at least one countersunk hole for securing the mounting plate with the dovetail mounting adapter; and at least one additional countersunk hole for securing the mounting plate with the rear slide mounting adapter.

Abstract: An optic sight assembly for installation on a riffle is disclosed, comprising an electro-optical optic sight unit which comprises a controller unit, a remote control receiver, and an electro-optical unit to project a reticle image; and a corresponding remote control unit to control operational parameters of the electro-optical optic sight. The remote control unit comprises a remote control controller to produce control signals for transmitting to the remote control receiver, and a keypad unit to enable entering control commands to the remote control unit, wherein the electro-optical optic sight is adapted to receive control signals from the remote control unit to control operational parameters of the reticle.

Abstract: A method of controlling a target marking system includes emitting a beam with a beam source associated with a target marker. The method also includes sensing movement of the target marker, and modifying operation of the beam source based on the sensed movement. Such modification changes a characteristic of the emitted beam.

Abstract: A removable rail for mounting over an AK iron sight assembly of an AK type rifle includes a pair of brackets that fit outer side surfaces of an AK iron sight assembly. At least one pressure clamp is disposed on a side of at least one bracket of the pair of brackets. When the pressure clamp is in an open position, the pair of brackets can be slid over the AK iron sight assembly for mounting or for removal. When the pressure clamp is in a closed position, the pair of brackets are held in a non-moving engagement with the outer side surfaces of the AK iron sight assembly. A fixed AK rail, another type of AK rail, and a method for adding a small arms accessory rail system to an AK rifle by mounting a rail over an AK iron sight assembly are also described.

Abstract: An armor plate includes atop surface and bottom surface disposed adjacent to the top surface and comprising a plurality of inflection points defining a first curve, a second curve, a third curve, and a fourth curve. The armor plate may be wearable on the front of a torso or the back of the torso. The bottom s face of the armor plate may include a substantially convex contour. A bottom region of the armor plate may include the first curve and a top region of the armor plate may include the second curve, with the first curve being tighter than the second curve. The bottom region may also be configured follow a contour of an abdomen while the top region is configured follow a contour of a thorax.

Abstract: A method for focusing a beam of a high energy radiation source on a reference point on the surface of a flying object, comprising: recording a number of consecutive two-dimensional images of the flying object determining the trajectory of the flight path simultaneously determining the line of sight angle between the image acquisition device and the position of the flying object calculating a three-dimensional model of the flying object displaying the currently acquired two-dimensional image marking the reference point on the displayed two-dimensional image of the flying object; calculating the three-dimensional reference point on the surface of the flying object focusing the beam of the high energy radiation source on the three-dimensional reference point.

Abstract: A firearms target system may be configured with at least a panel separated from a source with the panel consisting of at least one rotating mechanism, a target, and a shield. The one rotating mechanism can be configured to change the target relative to the shield in response to a prompt from a user.

Abstract: A network dart competition system is provided. In one example, the network competition system includes a first dart target configured to receive one or more darts from a first user; and a first receiving and analyzing device communicatively connected to the first dart target. The network competition system further includes a second dart target configured to receive one or more darts from a second user; and a second receiving and analyzing device communicatively connected to the second dart target. The first receiving and analyzing device and the second receiving and analyzing device communicate via a network to enable a dart competition between the first user and the second user.

Abstract: Various embodiments of the present disclosure provide an electronic target system and a hit detection method. In certain embodiments, the electronic target system includes a target having a plurality of distinct sectors, each having a measurable capacitance, and a controller configured to determine the capacitance and the change in capacitance of each sector. The controller generally monitors the capacitance and the change in capacitance of each sector. When a sector's capacitance changes at least a designated amount—such as when a projectile pierces the sector and reduces the sector's area—the controller determines that the sector has been hit. In other embodiments, the electronic target system includes a target including one or more vibration sensors configured to detect vibrations in the target. Upon detecting these vibrations, the vibration sensors send responsive signals to a controller. The controller analyzes these signals to determine whether a sector has been hit.

Abstract: A stimulant target unit including: a housing, at least one stimulation source configured to provide a stimulus to stimulate a user, a contact sensor configured to detect an impact to the stimulant target unit and triggered by an impact that is within a selected range of impact forces, a feedback system configured to inform the user the stimulant target unit has been actuated in response to the stimulus, a controller programmed to register triggering of the contact sensor, a protective cover configured to retain the stimulant target unit and a mounting structure configured to connect the stimulant target unit to a support structure. The mounting structure includes a vibration isolator configured to, over the selected range of impact forces, inhibit transmission of force from an impact within the selected range of impact forces on the support structure to the contact sensor sufficiently to prevent the triggering of the contact sensor.

Abstract: A toy may include a target having a target magnet and a first color configured to become a second color when the target is activated. The toy also may include a backing having a backing magnet configured to be mounted to an interior of a garment. The backing may be magnetically attracted to the target magnet through the garment when the target is on an exterior of the garment. The target may be configured to be retained on the garment only via magnetic force between the target magnet and the backing magnet. The target and the backing may be configured to be readily removed from the garment and have numerous re-uses for future play.

Abstract: A computerized shooting target system comprising a pivotal target, electromagnet, sensors, optional portable power supply and transceiver. Sensors on the target register a hit and transmit data to a computer. The computer processes hit information and sends instructions back to the target.

Abstract: An initiator including a housing adapted to be received in an igniter or rocket motor, at least one charge at a distal end of the housing, an electro-explosive device behind the charge for detonating the charge when subject to a voltage HV, and a pressure bulkhead behind the electro-explosive device. An electronic subsystem in the housing is connected to the electro-explosive device through the bulkhead and includes a lead for providing the voltage HV to the electro-explosive device to initiate it, and a switch in the lead which does not conduct if errant voltages are present on the lead to prevent initiation of the electro-explosive device until the correct voltage HV is present.

Abstract: The internally fluted arrows and arrow shafts made by the process of the present invention are designed to have decreased weight and improved stiffness. Fitted components can be used with the internally fluted arrows and arrow shafts.

Abstract: The present disclosure relates to structures that are adapted to facilitate the retention, storage, and transport of arrows. In one embodiment of the present disclosure, for example, an arrow retainer is described that includes a resilient portion having a plurality of passageways extending therethrough for retaining a plurality of arrows therein. Each passageway is resiliently expandable upon insertion of an arrow to maintain the position of the arrow. In another embodiment of the present disclosure, for example, an arrow storage device is disclosed that provides an efficient and secure means of storing arrows. The presently disclosed arrow retainer and arrow storage device may be used in conjunction with one another as part of an arrow storage system.

Abstract: The present invention provides a linked round carrying bag (11) consisting of a flexible sleeve and a fastening means (20). The sleeve is sealed at a first end (12), has an opening at. a second end (9) and has an openable closure (1), for example a zip, extending substantially from the first end (12) to the second end (9), A width of the sleeve is greater than the length of an individual round of the linked round that the bag (11) is designed to carry but is less than twice the length of an individual round. The fastening means {20) is adjacent a closed side of a opening (14) of the: sleeve and is arranged to be tightly fastenable around the closed side of the opening (14) and any linked round carried in the bag, The bag (11) is advantageous as the fastening means (20) can ensure that a linked round is held in its proper position within the bag (11), even when the bag (11) is carried as a bandolier.

Abstract: A perforating gun includes a charge tube having shaped charges affixed thereto. Each shaped charge includes a radially outward pointing post adapted to receive a detonator cord. A retention member installed on the post provides a compressive force that energetically couples the detonator cord to the post. The radially outermost portion of the retention member is radially flush with or radially recessed relative to the radially outermost portion of each post. In one embodiment, the retention member has a rounded medial portion, a central opening and a pair of locking tabs that point radially inward to the central opening. Each post may include a slot for receiving the detonator cord and a circumferential groove that is adapted to receive the locking tabs.

Abstract: Various tape measures and devices for stabilizing and securing such tape measures during use are described. Some tape measures may include a tang that extends from a back side of the tape measure. The extended tang may secure the tape measure to the object being measured. The tang may further provide lateral stabilization. Some tape measures may include a horizontal reel that lowers the center of gravity and increases stability of the tape measure. Further tape measures may incorporate extendable stabilizers that increase an effective width of the tape measure and thus its lateral stability during use.

Abstract: A measuring apparatus of the present invention includes a stage on which a measured object is placed, a measurement head having an information obtainer obtaining an image of the object, and a vertical driver supporting the measurement head so as to allow movement in a vertical direction. The vertical driver includes a counterbalance mechanism having a hanger of the measurement head, a pulley winding up and withdrawing the hanger by rotation, a spring increasing elastic force by stretching the spring when the measurement head displaces downward, and a cam rotating in conjunction with the pulley and having a cam shape decreasing rotational torque provided to the pulley by the elastic force as a stretching amount of the spring increases.

Abstract: A rotary probe head having a dual interface for probe mounting that allows two separate interfaces to be mounted on opposite sides of the “A” or elevation axis of the rotary probe head. The two interfaces can be rotatable and interchangeable and allow for increased flexibility in handling different types of attachments including attachments having widely different mass, size, and/or interface connections. A probe can be mounted to one interface and a counterweight can be mounted to the opposite interface for improved holding torque performance by reducing the duty force and heat factor generation of the motor in the probe head.

Abstract: A probe head rotation mechanism, situated between a spindle and a probe of a coordinate measurement device, includes: a main body frame supported by the spindle; a rotor supported by the main body frame so as to be capable of tilting with respect to an axial center of the spindle; the main body frame; and a motor supported by the main body frame and driving the rotor. A motor main body is arranged away from lying on the axial center of the spindle, and an axial center of the motor is oriented outward in a diameter direction of the spindle.

Abstract: A measuring device includes a rotatable stage configured to receive and rotate an object long a rotational axis of the object. A housing is located adjacent to the rotatable stage and is movable along the rotational axis of the object. The housing has a pivoting arm located between a pair of opposing compression springs which are configured to provide a preload force in a direction parallel to the rotational axis of the object. A probe tip is coupled to the pivoting arm and extends from the housing, the probe tip configured to contact a portion of the object. A displacement measuring device is coupled to the pivoting arm and is configured to measure displacement of the probe tip in the direction parallel to the rotational axis of the object based on movement of the pivoting arm against one of the opposing compression springs.

Abstract: The invention is a system and method that enable obtaining ultra-high resolution interference, phase and OCT images at high speed. The system uses neither mechanical moving elements nor any optical/electro optical modulating means for obtaining the OCT images. Two OCT operating modes are available: for ultra-high resolution the system allows either spatial coherence TD-FF-OCT or temporal coherence TD-FF-OCT imaging, whereas for high resolution and ultra-high speed the system allows FD-FF-OCT imaging with full range imaging. In the TD mode, the OCT enface images are obtained in real time. In the FD mode, the 2D complex signal is reconstructed in real time. In both cases the method has the advantage of very high speed imaging with great immunity to noise.

Abstract: Provided is an optical measuring device that can realize a wide measurement region without an increase in the measurement time or a reduction in the measurement region while avoiding damage to a measurement target due to excessive light exposure, using a simple configuration. The device includes a light source, an optical splitting unit configured to split a light beam emitted from the light source into a signal beam and a reference beam, an objective lens configured to focus the signal beam and irradiate a measurement target with the signal beam, a scanning unit configured to move the focus position of the signal beam, an optical element having lower transmissivity in its peripheral portion than in its central portion, interference optics configured to combine the reference beam with the signal beam reflected or scattered by the measurement target, thereby generating interference beams, and photodetectors configured to detect the respective interference beams.

Abstract: Systems and methods are described herein for a self-referencing interferometer. The interferometer can comprise an improved spatial phase shifter that reduces the number of components, size and complexity of the spatial phase shifter and maintains a common path for a combined reference beam and signal beam. The self-referencing interferometer further comprises a single mode fiber shunt for filtering the reference beam and further reducing the size of the interferometer. The angle of the reference beam can be tilted before being recombined with the single beam which further simplifies the spatial phase shifting component of the interferometer.

Abstract: A three-dimensional object printer generates image data of an object being formed in the printer with an optical sensor and identifies the heights of object features above a substrate on which the object is being formed. A controller operates one or more actuators to move the optical sensor at a plurality of distances above the object to generate image data of the object at a plurality of heights above the object. The controller identifies the distances of the features of the object with reference to the image data generated by the optical sensor and the focal length of the optical sensor.

Abstract: Some example forms relate to a method of nondestructively measuring a geometry of an electrical component on a substrate. The method includes directing light at the electrical component. The light is at an original intensity. The method further includes measuring light that is reflected off of the electrical component. The reflected light includes undiffracted light and diffracted light. The diffracted light is at a diffracted intensity. The method further includes determining a ratio of diffracted intensity to original intensity and utilizing the ratio to determine a geometry of the electrical component.

Abstract: Techniques for fiber optic light sensing and communication are provided. Specifically, systems and methods to provide diffusive optical fiber sensors and communication devices and methods of use are disclosed.

Abstract: A depth map may be generated in conjunction with generation of a digital image such as a light-field image. A light pattern source may be used to project a light pattern into a scene with one or more objects. A camera may be used to capture first light and second light reflected from the one or more objects. The first light may be a reflection of light originating from one or more other light sources independent of the light pattern source. The second light may be a reflection of the light pattern from the one or more objects. In a processor, at least the first light may be used to generate an image such as a light-field image. Further, in the processor, at least the second light may be used to generate a depth map indicative of distance between the one or more objects and the camera.

Abstract: A system and method for generating a database representative of a physical structure having a plurality of components may include a computer, a memory in communication with the computer, and a laser scanner in communication with the computer. The laser scanner may be configured to capture spatial data representative of points on the structure, wherein each of the points is part of one of the plurality of components. The computer may be programmed with instructions executable by the computer for receiving the spatial data, storing the spatial data in a database in the memory, receiving non-spatial data representative of each of the plurality of components, and, for each of the points, associating a portion of the non-spatial data with each respective point in the database based on a respective one of the plurality of components of which each respective point is a part. The data may include color data.

Abstract: An inherent pattern image (100, 100F) of a test object (10) is recorded when the test object is illuminated with uniform illumination light, and a projection pattern image (200, 200F) is recorded when the test object is illuminated with a spatially modulated projection pattern. A planar displacement vector field (110, 110F) is calculated from the inherent pattern image, and a shape (210, 210F) is calculated from the projection pattern image. An image of the first type is recorded at time (tT), and images of the second type are recorded at times (tT?; tT+) before and after the time (tT). A representation of the test object at the test time (tT) is estimated by averaging. A spatial displacement vector field (300) is based on the calculated representation of the test object of the first image type and the representation of the test object estimated from the images of the second type.

Abstract: A method for detecting the surface structure and composition of a sample by means of a scanning unit, in particular for detecting traces, which are induced by contact of the skin of the human body on the surface of an object or absorbed by means of a trace carrier. The sample and the scanning unit are moved in relation to one another. The sample surface is irradiated line-by-line using a light beam or laser beam emitted from the scanning unit. The light beam or laser beam reflected from the sample surface is detected, and a digital image of the topography of the sample surface and the intensity of the reflected light beam or laser beam is generated from deviations of the reflected light beam or laser beam from the emitted light beam or laser beam to illustrate the composition of the sample surface.

Abstract: In some embodiments, the method for boresighting a system under test (SUT) involves radiating, by the SUT, an illuminating signal(s) to a target, where the illuminating signal(s) is radiated onto an external screen of the target. The method further involves detecting, by an external detector(s), the illuminating signal(s) radiated onto the external screen to produce an external detector measurement. Also, the method involves aligning the SUT by using the external detector measurement. In addition, the method involves radiating, by the SUT, the illuminating signal(s) to the target, where the illuminating signal(s) is radiated through an opening located on a side of the target and onto an internal screen of the target. Additionally, the method involves detecting, by an internal detector(s) of the target, the illuminating signal(s) radiated onto the internal screen to produce an internal detector measurement. Further, the method involves aligning the SUT by using the internal detector measurement.

Abstract: A surface measuring device includes a rotary platform, a shifting lever, a measuring module, and a control module. The rotary platform carries an object under test and rotates the object under test at a rotating speed. The shifting lever is above the rotary platform. The measuring module disposed on the shifting lever moves to measurement positions on the shifting lever and performs a surface height measurement at a sampling frequency to sampling points on a surface of the object under test when located at one measurement position. The control module selectively adjusts the rotational speed for the rotary platform or the sampling frequency for the measuring module according to the measurement position of the measuring module on the shifting lever in order to fit a distance between the sampling points on at least one part of the surface of the object under test to a sampling rule.

Abstract: A surface measurement device includes a rotating platform, a motion lever, a measuring module and a control module. The rotating platform rotates an object at a rotating speed. The motion lever is above the rotating platform. The measuring module moves to a variety of measuring positions on the motion lever. When the measuring module is at one of the measuring positions, the measuring module measures the heights of a plurality of sampling points on the surface of the object in a sampling frequency. The control module selectively modifies the rotating speed of the rotating platform or the sampling frequency of the measuring module according to the measuring position of the measuring module to make the distance between the sampling points in at least a region of the surface of the object match a sampling rule.

Abstract: A medium texture detection device includes: a radiation optical system that radiates non-coherent light to a sheet-shaped medium which is being transported; and a light reception optical system that receives diffused/reflected light of the non-coherent light from the medium. A surface of the medium has a basic structure for making a change in an intensity of the diffused/reflected light according to a position of the medium in a transport direction of the medium. A visual field of the light reception optical system is set to be equal to or greater than 1/10 times and equal to or less than 4 times of a size of the basic structure.

Abstract: An image capture device includes at least one image capture unit and a calibration unit. A calibration method of the image capture device includes an image capture unit of the at least one image capture unit capturing a first image, the calibration unit executing a global calibration operation on original coordinates of all image points of the first image to generate first rectification coordinates of the all image points, the calibration unit finding a geometric graph including each image point of at least one image point of the all image points according to first rectification coordinates of the each image point of the at least one image point of the all image points, and the calibration unit rectifying the first rectification coordinates of the each image point to second rectification coordinates of the each image point according to a rectification equation corresponding to the geometric graph.

Abstract: A system for and method of detecting and placing a line at a depth within a body of water comprises a reel for dispensing a quantity of line and an accelerometer for detecting a deviation of the dispensed line from a vertical axis. Based on the deviation of the dispensed line from the vertical axis and the amount of dispensed line a depth of the dispensed line within a moving body of water is able to be calculated. Additionally, based on the deviation of the dispensed line from the vertical axis and the desired depth of the line within a moving body of water, a necessary amount of line for the desired depth is able to be calculated.

Abstract: Altitude measurement device including an atmospheric pressure sensor arranged to be compressed or to expand in a rectilinear direction as a function of the atmospheric pressure to be measured which increases or decreases, wherein the movements of deformation of the atmospheric pressure sensor are transformed, via a transmission system, into a pivoting motion, in a plane perpendicular to the rectilinear direction of deformation of the atmospheric pressure sensor, of an activation system which drives the pivoting of an indicator hand, wherein the indicator hand moves over a graduated circular scale, wherein the atmospheric pressure sensor is arranged to be able to be moved in one direction or in the opposite direction depending on the rectilinear direction of deformation thereof relative to the other components of the altitude measurement device, wherein the atmospheric pressure sensor is mounted on a seat which is fixed in a support, which forms a case with a cover.

Abstract: Implementations of a measuring apparatus to aide with hanging objects are provided. In some implementations, the measuring apparatus comprises a housing containing a level and a first coiled tape blade, a second coiled tape blade, and a third coiled tape blade. In some implementations, each tape blade includes measuring indicia and each coiled tape blade is configured to uncoil and extend outside the housing and retract to a coiled configuration. In some implementations, the first tape blade is configured to extend in a first direction, and the second tape blade is configured to extend in a second direction. In some implementations, the second direction is 180 degrees from the first direction. In some implementations, the third tape blade is configured to extend in a third direction. In some implementations the third direction is 90 degrees from the first direction. In some implementation, the third tape blade has attached to the end that extends outside the housing a weight.

Abstract: A method for automatically validating measurements of a field survey including providing, on a field computing device, a two-dimensional image of a field to be surveyed, providing actual coordinates of at least two field reference points, each corresponding to an image reference point on the two-dimensional image, employing the field computing device to outline, on the two-dimensional image, features of interest of the field, employing the field computing device to manually select, on the outline, a plurality of image measuring points, for each image measuring point, identifying a corresponding field measuring point, measuring the actual coordinates of each field measuring point, thereby obtaining actual coordinates thereof, and responsive to the obtaining, automatically ascertaining for each image measuring point and corresponding field measuring point, whether there is a discrepancy between the location of the image measuring point on the two-dimensional image and the actual coordinates of the corresponding

Abstract: A method of correcting an output value of a geomagnetic sensor that recursively calculates a state estimate, an estimate gain vector, and an estimate error co-variance based on the output value of the geomagnetic sensor that is acquired sequentially and corrects the output value of the geomagnetic sensor based on the value includes acquiring a kth output value of the geomagnetic sensor, calculating a kth estimate gain vector based on a k?1th estimate error co-variance and the kth output value, calculating a kth state estimate based on the calculated kth estimate gain vector and the kth output value and a k?1th state estimate, calculating the kth estimate error co-variance using the kth estimate gain vector and a k?1th estimate error co-variance, and correcting the output value of the geomagnetic sensor based on the kth state estimate, wherein k is a natural number larger than 1.

Abstract: System and method can support a measurement module on a movable object. The measurement module includes a first circuit board with one or more sensors. Additionally, the measurement module includes a weight block assembly, wherein the weight block assembly is configured to have a mass that keeps an inherent frequency of the measurement module away from an operation frequency of the movable object. Furthermore, said first circuit board can be disposed in an inner chamber within the weight block assembly.

Abstract: A physical quantity sensor includes a detection unit outputting a detection signal corresponding to a vibration of a vibrating element in an angular velocity sensor, and a self-diagnostic unit self-diagnosing a detection environment of an acceleration sensor and the angular velocity sensor on a basis of the detection signal outputted by the detection unit.

Abstract: A method for manufacturing a MEMS element, including the following: forming a least one stationary weight element and at least one moving weight element in the MEMS element, and positioning at least one fixing element at the stationary weight element and at the moving weight element, the fixing element being formed so as to be able to be severed.

Abstract: An integrated MEMS structure includes a driving assembly anchored to a substrate and actuated with a driving movement. A pair of sensing masses suspended above the substrate and coupled to the driving assembly via elastic elements is fixed in the driving movement and performs a movement along a first direction of detection, in response to an external stress. A coupling assembly couples the pair of sensing masses mechanically to couple the vibration modes. The coupling assembly is formed by a rigid element, which connects the sensing masses and has a point of constraint in an intermediate position between the sensing masses, and elastic coupling elements for coupling the rigid element to the sensing masses to present a first stiffness to a movement in phase-opposition and a second stiffness, greater than the first, to a movement in phase, of the sensing masses along the direction of detection.

Abstract: A method for operating a rotational rate sensor having a substrate and at least one structure movable relative thereto, at least one first and at least one fourth electrodes fastened to the structure, and at least one second, at least one third, at least one fifth, and at least one sixth electrodes fixed to the substrate, the first electrode being situated at least partially between second and third electrodes, the fourth electrode being situated at least partially between fifth and sixth electrodes, in each case in a rest position of the structure and along a direction essentially parallel to a first axis, the structure being excited, in a first task, from a rest position of the structure to an oscillation having a movement component essentially parallel to a second axis running perpendicular to the first axis during at least one first time interval within at least one oscillation period.

Abstract: A method for calculating an angle of inclination of a magnetic field in a sensor coordination system includes measuring a magnetic field vector using a magnetometer, measuring an acceleration vector using an accelerometer, determining whether the sensor coordination system is in a moving state or a stationary state using the acceleration vector, and calculating the inclination angle of the magnetic field using the magnetic field vector and the acceleration vector, in response to the determining indicating the stationary state.

Abstract: According to one embodiment, a PLL circuit includes: a digital phase comparator that captures an instantaneous value of a reference clock signal, which is a digital since wave, in synchronization with a feedback clock signal, and detects a phase difference between the reference clock signal and the feedback clock signal based on the captured instantaneous value; a control voltage generation unit that generates a control voltage according to the phase difference; a voltage control oscillator that generates an output clock signal having a frequency according to the control voltage; a frequency divider that divides a frequency of the output clock signal to generate the feedback clock signal; and a control unit that amplifies the reference clock signal to be supplied to the digital phase comparator with an amplification factor according to the phase difference.

Abstract: Techniques are provided which may be implemented using various methods and/or apparatuses in a mobile device to provide cradle insensitive inertial navigation. An example method for determining alignment changes between a first body frame and a second body frame according to the disclosure includes obtaining one or more images from an image capture device associated with the first body frame in response to detecting a change in alignment between the first body frame and the second body frame, determining a compensation information based on an analysis of the one or more images, and determining a position based on one or more inertial sensors and the compensation information.