Abstract: The present disclosure provides a method and apparatus for virtual walking, which relates to the field of games. In the present disclosure, geometric-shape attribute parameters of a physical area in which a user walks may be acquired. Then, a plurality of virtual areas each matching the geometric-shape attribute parameters may be obtained in a virtual scene. Further, when the user walks to a corner of a physical area, a target virtual area is selected from the plurality of virtual areas and a virtual person corresponding to the user may be transferred from a current virtual area to the target virtual area. The current virtual area may be a virtual area among the plurality of virtual areas corresponding to the user's current walking status. Therefore, the method and apparatus for virtual walking in the present disclosure enable infinite virtual spaces within the confines of limited physical spaces without visual deviation.

Abstract: The present invention includes an optical waveguide with a grating and a method of making the same for increasing the effectiveness of the grating. In one example, the grating is at least partially covered by a liner layer disposed on at least a portion of a grating; and a cover layer disposed on the liner layer, wherein a first material selected for the core and ridges and a second material selected for the liner layer are selected to provide a difference in the index of refraction between the first and second material that is sufficient to provide a contrast therebetween.

Abstract: The present invention includes an optical waveguide with a grating and a method of making the same for increasing the effectiveness of the grating. In one example, the grating is at least partially covered by a liner layer disposed on at least a portion of a grating; and a cover layer disposed on the liner layer, wherein a first material selected for the core and ridges and a second material selected for the liner layer are selected to provide a difference in the index of refraction between the first and second material that is sufficient to provide a contrast therebetween.

Abstract: A power generator for use to generate power for metrology hardware like gas meters and flow measuring devices. The power generator may use flame-less combustion that creates heat from fuel gas. The heat causes a temperature differential. The power generator may include a thermal electric generator that generates an electrical signal in response to the temperature differential.

Abstract: A manifold assembly configured to measure differential pressure of fluid. The manifold assembly may have a monolithic body with an internally drilled fluid pathway. The body supports a differential pressure transducer that communicates, on either end, with the internally drilled fluid pathway. This configuration can generate data that defines pressure drop across impellers or other mechanisms on metrology hardware (or “gas meters”). Utilities can use this data to diagnose health or other conditions on the gas meter in the field.

Abstract: An energy harvester for use to provide power to metrology hardware like gas meters and flow measuring devices. The energy harvester may include an actuator that mounts to a substrate found in the gas meter or in an adjacent, collateral device like a pressure regulator. The substrate may embody a diaphragm or membrane, possibly a thin, flexible or semi-rigid member. The actuator may include piezoelectric transducers that mount to this member. In operation, the piezoelectric transducers can generate an electrical signal in response to mechanical activity (or energy) from the thin member. The electrical signal can be directed to the flow device to replace, supplement, or recharge a power source that powers electronics necessary to expand functions on the flow meter.

Abstract: The present invention includes an optical waveguide with a grating and a method of making the same for increasing the effectiveness of the grating. In one example, the grating is at least partially covered by a liner layer disposed on at least a portion of a grating; and a cover layer disposed on the liner layer, wherein a first material selected for the core and ridges and a second material selected for the liner layer are selected to provide a difference in the index of refraction between the first and second material that is sufficient to provide a contrast therebetween.

Abstract: The present invention includes an optical waveguide with a grating and a method of making the same for increasing the effectiveness of the grating. In one example, the grating is at least partially covered by a liner layer disposed on at least a portion of a grating; and a cover layer disposed on the liner layer, wherein a first material selected for the core and ridges and a second material selected for the liner layer are selected to provide a difference in the index of refraction between the first and second material that is sufficient to provide a contrast therebetween.

Abstract: Wellbore sensor systems and related methods are disclosed. A wellbore sensor system includes a first sensor node and a second sensor node. The first sensor node is operably coupled to a drill string at a first location. The second sensor node is operably coupled to the drill string at a second location. A method includes taking first sensor readings from the first sensor node relative to a first spatial frame of reference, and taking second sensor readings from the second sensor node relative to a second spatial frame of reference, and using the first sensor readings and the second sensor readings to estimate parameters of a mathematical transform configured to transform the second sensor readings into the first spatial frame of reference. The method also includes transforming the second sensor readings into the first spatial frame of reference with the estimated mathematical transform.

Abstract: The present invention includes an optical waveguide with a grating and a method of making the same for increasing the effectiveness of the grating. In one example, the grating is at least partially covered by a liner layer disposed on at least a portion of a grating; and a cover layer disposed on the liner layer, wherein a first material selected for the core and ridges and a second material selected for the liner layer are selected to provide a difference in the index of refraction between the first and second material that is sufficient to provide a contrast therebetween.

Abstract: An optical transmitter includes a reflective semiconductor optical amplifier (RSOA) coupled to an input end of a first optical waveguide. An end of the first optical waveguide provides a transmitter output for the optical transmitter. Moreover, a section of the first optical waveguide between the input end and the output end is optically coupled to a ring modulator that modulates an optical signal based on an electrical input signal. A passive ring filter (or a 1×N silicon-photonic switch and a bank of band reflectors) is connected to provide a mirror that reflects light received from the second optical waveguide back toward the RSOA to form a lasing cavity. Moreover, the ring modulator and the passive ring filter have different sizes, which causes a Vernier effect that provides a large wavelength tuning range for the lasing cavity in response to tuning the ring modulator and the passive ring filter.

Abstract: A power generator for use to generate power for metrology hardware like gas meters and flow measuring devices. The power generator may use flame-less combustion that creates heat from fuel gas. The heat causes a temperature differential. In one implementation, the power generator may include a thermal electric generator that generates an electrical signal in response to the temperature differential.

Abstract: A camera configuration method solving the problem of lacking effective way to properly configure motion capture cameras in the conventional technologies, comprising: in a preset view region, determining a preset number of camera configuration modes according to camera parameters set by a user; setting a preset number of test points in the preset view region; calculating a number of visible cameras for each test point in each camera configuration mode; based on the number of visible cameras and a total number of cameras used for each camera configuration mode, calculating a configuration cost value for each camera configuration mode; and determining a final camera configuration mode based on the configuration cost value for each camera configuration mode. An effective way to properly configure the appropriate number of motion capture cameras is provided. The cost can be effectively saved while ensuring the effect of motion capture.

Abstract: An optical transmitter includes a reflective semiconductor optical amplifier (RSOA) coupled to an input end of a first optical waveguide. An end of the first optical waveguide provides a transmitter output for the optical transmitter. Moreover, a section of the first optical waveguide between the input end and the output end is optically coupled to a ring modulator that modulates an optical signal based on an electrical input signal. A passive ring filter (or a 1×N silicon-photonic switch and a bank of band reflectors) is connected to provide a mirror that reflects light received from the second optical waveguide back toward the RSOA to form a lasing cavity. Moreover, the ring modulator and the passive ring filter have different sizes, which causes a Vernier effect that provides a large wavelength tuning range for the lasing cavity in response to tuning the ring modulator and the passive ring filter.

Abstract: An optical transmitter includes a reflective semiconductor optical amplifier (RSOA) coupled to an input end of a first optical waveguide. An end of the first optical waveguide provides a transmitter output for the optical transmitter. Moreover, a section of the first optical waveguide between the input end and the output end is optically coupled to a ring modulator that modulates an optical signal based on an electrical input signal. A passive ring filter (or a 1×N silicon-photonic switch and a bank of band reflectors) is connected to provide a mirror that reflects light received from the second optical waveguide back toward the RSOA to form a lasing cavity. Moreover, the ring modulator and the passive ring filter have different sizes, which causes a Vernier effect that provides a large wavelength tuning range for the lasing cavity in response to tuning the ring modulator and the passive ring filter.

Abstract: A gas meter (100) and like metering systems that are configured for use underwater. The gas meter may embody a positive displacement rotary gas meter having a meter body with impellers that counter-rotate in response to material flow. The gas meter can also comprise an index unit having an electronics assembly to generate a value that equates rotation of impellers with a parameter of the material flow. The gas meter can further comprise a connective interface having a first part and a second part, one each disposed on the meter unit and the index unit, respectively, the first part and the second part coupling with one another to provide data to the electronics assembly, the data corresponding with operating conditions on the meter unit and rotation of the impellers. In one example, the first part and the second part are configured so that the meter unit and the index unit are operable underwater to generate the value.

Abstract: An energy harvester for use to provide power to metrology hardware like gas meters and flow measuring devices. The energy harvester may include an actuator that mounts to a substrate found in the gas meter or in an adjacent, collateral device like a pressure regulator. The substrate may embody a diaphragm or membrane, possibly a thin, flexible or semi-rigid member. The actuator may include piezoelectric transducers that mount to this member. In operation, the piezoelectric transducers can generate an electrical signal in response to mechanical activity (or energy) from the thin member. The electrical signal can be directed to the flow device to replace, supplement, or recharge a power source that powers electronics necessary to expand functions on the flow meter.

Abstract: A camera configuration method solving the problem of lacking effective way to properly configure motion capture cameras in the conventional technologies, comprising: in a preset view region, determining a preset number of camera configuration modes according to camera parameters set by a user; setting a preset number of test points in the preset view region; calculating a number of visible cameras for each test point in each camera configuration mode; based on the number of visible cameras and a total number of cameras used for each camera configuration mode, calculating a configuration cost value for each camera configuration mode; and determining a final camera configuration mode based on the configuration cost value for each camera configuration mode. An effective way to properly configure the appropriate number of motion capture cameras is provided. The cost can be effectively saved while ensuring the effect of motion capture.

Abstract: The present invention discloses a climbing test bench for scooters, comprising a middle bridge arranged horizontally and above the ground and a first skew bridge and a second skew bridge which are arranged at both ends of the middle bridge; an upper end of the first skew bridge is hinged with one end of the middle bridge, an upper end of the second skew bridge is hinged with the other end of the middle bridge, a lower end of the first skew bridge and a lower end of the second skew bridge are in contact with the ground, respectively; and a lifting device is arranged below the middle bridge, and the lifting device may drive the middle bridge to rise and fall so that the first skew bridge and the second skew bridge form different tilt angles. Due to light weight of a scooter, it is not desired to provide a truss-frame structure. The arrangement of a lifting device can ensure the stability of the present invention.