Sunnyvale, CA, United States
Sunnyvale, CA, United States

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The invention relates to generating regional tropospheric correction information for correcting observations useful for estimating phase ambiguities and/or a position of global or regional navigation satellite systems (NSS) receiver(s). For each of a plurality of reference stations, at least one troposphere correction parameter is estimated by evaluating NSS observation equations using i) precise satellite information or the information derived from the precise satellite information, and ii) received multiple-frequency-signals-based raw observations or a linear combination thereof. The regional tropospheric correction information is then generated based on the estimated troposphere correction parameter(s) per reference station, the tropospheric correction information comprising a regional tropospheric delay function(s) and coefficients representing a tropospheric delay affecting a NSS signal passing through the troposphere in a region of interest. The generated tropospheric correction information may then be sent to NSS receiver(s) and used by the receiver(s) for example to facilitate position determination.


Embodiments provide for a geodetic instrument comprising a scanning head, a reflecting optical element, a radiation source, a control unit and an electronic distance measurement (EDM) unit. The scanning head is rotatable about a first axis. The reflecting optical element mounted in the scanning head and rotatable about the same first axis. The radiation source is adapted to emit light to be output along a light beam path from the geodetic instrument via light reflection against the reflecting optical element. The control unit is adapted to adjust an angular displacement profile of the reflecting optical element about the first axis relative to an angular displacement profile of the scanning head such that an angular displacement of the light beam path about the first axis as a function of time presents a stair-like profile. The EDM unit is adapted to determine a distance to a target during a flat portion of the stair-like profile.


Patent
Trimble | Date: 2016-08-03

Methods and systems for inspection, safety assurance, tracking, and/or as-built comparison use an imaging tool to acquire imaging data of a scene. The imaging data is processed to create a three-dimensional representation of the scene. Radio frequency (RF) data is received from an RF tag using an RF reader. The RF tag is associated with an object within the scene. The object in the three-dimensional representation of the scene is identified based on the RF data and compared to a model of the object.


The invention relates to generating regional tropospheric correction information for correcting observations useful for estimating phase ambiguities and/or a position of global or regional navigation satellite systems (NSS) receiver(s). For each of a plurality of reference stations, at least one troposphere correction parameter is estimated (s30) by evaluating NSS observation equations using i) precise satellite information or the information derived from the precise satellite information, and ii) received multiple-frequency-signals-based raw observations or a linear combination thereof. The regional tropospheric correction information is then generated (s40) based on the estimated troposphere correction parameter(s) per reference station, the tropospheric correction information comprising a regional tropospheric delay function(s) and coefficients representing a tropospheric delay affecting a NSS signal passing through the troposphere in a region of interest. The generated tropospheric correction information may then be sent (s50) to NSS receiver(s) and used by the receiver(s) for example to facilitate position determination.


A method for solving the initial azimuth for a survey instrument, and other devices, with position and tilt information. The method may be part of bundle adjustment performed during the processing of image and position data collected from each camera of a survey instrument. The use of the initial azimuth generation method (and initial azimuth generator) makes it possible to get accurate azimuth orientation of a camera, such as each camera of a multi-camera survey instrument, without using data from a compass-like sensor. The initial azimuth generated by this method can then be used in later steps/processes of the bundle adjustment to find tie-points with an automatic tie-point finder. Prior to this method, the automatic tie-point finding algorithm relied on the compass and its accuracy, and inaccurate compass values would cause a complete failure, slow runtimes, or less accurate results for the bundle adjustment.


The present disclosure relates to a measuring instrument and a method implemented in such a measuring instrument. The measuring instrument includes an image sensor, an actuator, a control unit and a processor. The actuator is arranged to move a field of view of the image sensor. The control unit is configured to cause the image sensor to capture at least one digital image during motion of the field of view of the image sensor by the actuator. The exposure time for capturing the digital image is longer than an identifiable section of a regulating pattern for modulation of an optical radiation either emitted or reflected by at least one target. The processor is configured to process at least a portion of the captured image for detecting in the at least one portion the identifiable section of the regulating pattern. Such a measuring instrument is advantageous for detecting and/or identifying a target in the vicinity of the instrument.


Patent
Trimble | Date: 2017-04-05

A transmit light signal is emitted toward a target at an emission time. An optical subsystem of a receiving system receives a return light signal which is converted to a return electrical signal. At least one attenuator applies an attenuation to at least one of the return light signal and the return electrical signal. The attenuation varies, as time passes, after emission of the transmit light signal, according to a time -dependent attenuation function such that the attenuation is maximum at a critical time elapsed since an emission time of the transmit light signal. The critical time is dependent on at least one geometrical parameter of the optical subsystem. A receive time is determined from the return electrical signal. The emission time and the receive time are used to calculate a measured distance.


Patent
Trimble | Date: 2017-01-26

A system for managing kinematic assets is disclosed. In one embodiment, the system comprises an electronic identification device associated with an asset. The system further comprises a container comprising a reader disposed within the container for receiving a unique identification of the identification device. The container further comprises a reader node for maintaining an inventory record comprising the asset and for generating a report when the asset is not detected by said reader. The report further comprises a location of the container when said report is generated. The system further comprises a kinematic asset management platform comprising an asset registry for storing data conveyed by the report and a reports engine for generating a second report conveying the location of said container when the report is generated.


The present disclosure relates to a measuring instrument (100) and a method (3000) implemented in such a measuring instrument. The measuring instrument includes an image sensor (110), an actuator (120), a control unit (130) and a processor (140). The actuator is arranged to move a field of view (150) of the image sensor. The control unit is configured to cause the image sensor to capture at least one digital image during motion of the field of view of the image sensor by the actuator. The exposure time for capturing the digital image is longer than an identifiable section of a regulating pattern for modulation of an optical radiation either emitted or reflected by at least one target. The processor is configured to process at least a portion of the captured image for detecting in the at least one portion the identifiable section of the regulating pattern. Such a measuring instrument is advantageous for detecting and/or identifying a target in the vicinity of the instrument.


A Global Navigation Satellite System (GNSS) chipset embedded within the cellular device is accessed. The GNSS chipset calculates raw pseudoranges. The raw pseudoranges are extracted from the GNSS chipset for processing elsewhere in the cellular device outside of the GNSS chipset. A position fix is calculated based on the raw pseudoranges. At a first point in time, a first image, and at a second point in time, a second image are obtained with an image capturing device that is in a known physical relationship with the cellular device. An estimate of a distance that the cellular device moved from the first point in time to the second point in time is calculated by processing image data collected from the first point in time to the second point in time. The position fix is processed based on the estimate of the distance.

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