Google Inc.

Pivotal Systems Corporation

Sherk Chung

Advait Jain

Murphy Stein

Lucine Oganesian

Saket Patkar

Ian Atkinson

Joseph R Monkowski

Paul Tran

Yi Wang

Sophia Leonidovna Shtilman

Jialing Chen

James MacAllen Chalmers

Paxton Ming Kai Chow

Jeffrey William Scudder

Jacob Andrew Sharf

Vera Alexandrova Snowball

Abhijit Majumdar

Tri Duc Pho

Xiaomi Mao

Jiuyi Cheng

Geoffrey Rodney Wong

Chalee Asavathiratham

Barton George Lane, Iii

Joseph Ethier

Joe Ethier

Mukund Chakravarthy Venkatesh

Tomislav Lozic

Andrew Bryan Nelson

Robert Oliver

Yutung Liu

Jianwen Zhou

Keith John Sanders

Tri Pho

Jacob Sharf

Saket Parkar

An electromagnetic (EM) pose tracking system includes a computer input device having a pen or stylus form factor. In some embodiments, a base station device includes one of the transmitter (Tx) or receiver (Rx) module for the EM pose tracking system while the computer input device includes the other of the TX and receiver modules. The EM pose tracking system employs the Tx and Rx modules to collect EM pose data indicating a relative pose between the Tx and Rx modules. Based on the EM pose data, the EM pose tracking system (or a computer device working with the EM pose tracking system) identifies a pose (position, orientation, or both position and orientation) of the computer input device.

Writing device with electromagnetic tracking

A handheld electronic device is described for controlling three-dimensional content displayed in a user interface of a computing device. The handheld electronic device may include an electromagnetic sensing system for detecting a pose of the handheld electronic device in three-dimensional space and at least one communication module to trigger transmission of the commands to manipulate three-dimensional content displayed in the computing device based on detected changes in the pose of the handheld electronic device.

Electromagnetically tracked three-dimensional air mouse

Systems, devices, and methods synchronize sensor data and timestamps based on a second clock of a second device relative to a first clock of a first device. The data are communicated from the second device to the first device by way of respective wireless circuits in the first and second devices. Timestamps based on the second clock are corrected based on one or more of a time offset value and a clock frequency offset value of the second clock relative to the first clock. The timestamps for the sensor data are scaled to account for clock drift, and shifted to account for clock offset error.

System and method for accurate timestamping of virtual reality controller data

A method of receiving EM field magnitude values indicative of a first pose of a mobile unit in relation to a base unit, receiving sensor data from a second sensor associated with the mobile unit, where the sensor data is indicative of a direction of movement of the mobile unit, calculating a set of candidate pose solutions based on the EM field magnitude values, selecting a pose from the set of candidate pose solutions based on the sensor data from the second sensor, and sending the pose to the processor.

Hemisphere ambiguity correction in electromagnetic position tracking systems

A device uses a hybrid pose tracking system, whereby the hybrid pose tracking system includes both an EM pose tracking system and a secondary pose tracking system, such as a line-of-sight pose tracking system. The hybrid pose tracking system collects EM pose data from the EM tracking system indicating a relative pose between a transmitter and a receiver, and further collects from the secondary tracking system secondary pose data that is also indicative of the pose of either the transmitter or the receiver. The hybrid pose tracking system calculates a weighted combination (e.g., a weighted sum) of the EM pose data and the secondary pose data to generate a final pose for the device.

Hybrid pose tracking system with electromagnetic position tracking

An electromagnetic (EM) position tracking system identifies the pose of objects based on detected strength values of an EM field. To address distortions in the field, the system employs a pose sensor to provide a second pose of the mobile unit. Under conditions where no distortion in the EM field has been detected, the HMD applies a nominal set of corresponding weights to the EM pose data and the IMU pose data, respectively, and combines the weighted pose value to identify a combined pose of the mobile unit. In response to detecting conditions that indicate distortion in the EM field, the HMD can apply different weights to the EM pose data and IMU pose data to, for example increase the influence of the IMU pose data on the combined pose.

Correcting field distortion in electromagnetic position tracking systems

An EM pose tracking system controls a power mode by adjusting a transmit power of the EM transmitter based on a metric correlated with jitter in the EM readings. Such a metric includes metrics such as estimated noise computed from received EM data, a computed distance between the transmitter and the receiver, a measured signal power between the transmitter and the receiver, and the like. By adjusting the transmit power based on the jitter metric, the EM tracking system can reduce overall power consumption at a device that employs the EM tracking system, thus allowing the system to be used in a wider variety of devices and improving the user experience with those devices.

Power management for electromagnetic position tracking systems

An in-situ gas flow measurement controller measures the temperature and rate of pressure drop upstream from a flow control device (FCD). The controller samples the pressure and temperature data and applies the equivalent of a decimating filter to the data to produce filtered data at a slower sampling rate. The controller derives timestamps by counting ticks from the sampling clock of the A/D converter that is sampling the pressure at regular intervals to ensure the timestamps associated with the pressure samples are accurate and do not contain jitter that is associated with software clocks. The controller additionally normalizes the temperature reading to account for power supply fluctuations, filters out noise from the pressure and temperature readings, and excludes data during periods of instability. It calculates the gas flow rate accounting for possible non-linearities in the pressure measurements, and provides the computed gas flow measurement via one of many possible interfaces.

Method and apparatus for enhancing in-situ gas flow measurement performance

A method and system for intercepting and forwarding High-Speed SECS Message Services (HSMS) communication between at least two entities, includes a fail-safe bypass to ensure the communications link between the entities is not severed upon failure of the intercepting/forwarding agent. A 'pass-through' agent is placed in between two entities communicating via an HSMS link, such that the pass-through agent is able to intercept messages from one entity and forward it to the other entity, and vice versa. The pass-through agent is able to see all messages between the two entities, and is also able to create HSMS messages and send them to one of the entities as if the message had come from the other entity, thereby conferring the ability to inject additional HSMS messages. Should the pass-through agent fail, a bypass mechanism ensures that the two entities can automatically resume HSMS communication without the pass-through agent.

High-speed SECS message services (HSMS) pass-through including bypass

Embodiments of the present invention relate to managing timestamps associated with received data. According to one embodiment, data is collected from a device that generates data at a specified rate, but which lacks a built-in clock. An accurate timestamp is assigned to the data by first taking an absolute timestamp from a reference clock, and then adding a calculated amount of time to each subsequent data point based on an estimate of the sampling frequency of the device. As the generated timestamp drifts from the actual reference clock time, the sampling frequency is re-estimated based on the amount of detected drift.

Data timestamp management

Embodiments in accordance with the present invention allow a second end-point determination (EPD) system to actively control the end-pointing of a semiconductor process chamber, by leveraging a legacy EPD system that is already integrated with the chamber. In one embodiment, the second EPD system controls a shutter that regulates the amount of light transmitted between a plasma light source and an optical emission spectroscopy (OES) sensor of the legacy OES EPD system. In this embodiment, the legacy OES EPD system is pre-configured to call end-point when an artificial end-point condition occurs, i.e. the intensity of light falls below a pre-set threshold. When the second EPD system determines an actual end-point condition has been reached, it closes the shutter which, causes the light intensity being read by the OES sensor to fall below the pre-set threshold. This in turn triggers an end-point command to the chamber from the legacy OES EPD system.

System and method for controlling process end-point utilizing legacy end-point system

Leaks in a processing chamber, including 'virtual leaks' resulting from outgassing of material present within the chamber, may be detected utilizing an optical emission spectroscopy (OES) sensor configured to monitor light emitted from plasma of a sample from the chamber. According to certain embodiments, gas introduced into the chamber by the leak may be detected directly on the basis of its optical spectrum. Alternatively, gas introduced by the leak may be detected indirectly, based upon an optical spectrum of a material resulting from reaction of the gas attributable to the leak. According to one embodiment, data from the OES sensor is received by a processor that is configured to compute a leak detection index. The value of the leak detection index is compared against a threshold to determine if a leak is detected. If the value of the index crosses the threshold, a notification of the existence of a leak is sent.

System and method for vacuum chamber leak detection

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Piedmont, CA, United States of America

Sherk Chung