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公开(公告)号：US10514467B2
公开(公告)日：2019-12-24
申请号：US15482625
申请日：2017-04-07
Applicant: JAVAD GNSS, Inc.
Inventor： Javad Ashjaee
IPC: G01S19/43
Abstract: A method of determining a position of a GNSS device includes receiving GNSS signals at the GNSS device from a plurality of GNSS satellites. The GNSS device generates GNSS raw data based on the GNSS signals. The GNSS raw data is stored on the GNSS device. The GNSS device receives first correction data and second correction data. The first correction data and the second correction data are generated from data from at least one reference station. Third correction data is determined based on the first correction data, the second correction data, and the GNSS raw data. Position data for the GNSS device is determined based on the third correction data and the GNSS raw data.
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公开(公告)号：US20190011570A1
公开(公告)日：2019-01-10
申请号：US15644689
申请日：2017-07-07
Applicant: JAVAD GNSS, Inc.
Inventor： Javad ASHJAEE
Abstract: Systems and methods are provided for verifying a location of a global navigation satellite system (GNSS) base station or rover. In one example, a method for verifying a location of a GNSS base station includes measuring velocity of the GNSS base station, determining movement of the GNSS base station based on the measured velocity, and, in response to determining movement of the GNSS base station, transmitting a movement alert to a GNSS rover.
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公开(公告)号：US20150323676A1
公开(公告)日：2015-11-12
申请号：US14274317
申请日：2014-05-09
Applicant: JAVAD GNSS, Inc.
Inventor： Javad ASHJAEE , Sergey YUDANOV
CPC classification number: G01S19/243 , G01S19/22 , G01S19/24
Abstract: Systems and methods for synchronizing a global navigation satellite system (GNSS) receiver with a GNSS signal are provided. In one example, a GNSS receiver may include one or more sets of 20 GNSS channels that are each configured to integrate a received GNSS signal over a 20 millisecond accumulation window to output a navigation message bit. The accumulation windows of the 20 GNSS channels may be delayed relative to other windows of the 20 GNSS channels by 1 millisecond. The GNSS receiver may identify one of the 20 GNSS channels having the correct synchronization with the GNSS signal based on the navigation message bits output by the 20 GNSS channels. The identified GNSS channel having the correct synchronization with the GNSS signal may be used to determine a location of the GNSS receiver.
Abstract translation: 提供了用于使全球导航卫星系统（GNSS）接收机与GNSS信号同步的系统和方法。 在一个示例中，GNSS接收器可以包括一组或多组20个GNSS信道，每组GNSS信道被配置为在20毫秒累积窗口上集成接收的GNSS信号以输出导航消息位。 20个GNSS信道的累加窗口可能相对于20个GNSS信道的其他窗口延迟1毫秒。 GNSS接收器可以基于由20个GNSS信道输出的导航消息比特来识别具有与GNSS信号的正确同步的20个GNSS信道之一。 具有与GNSS信号的正确同步的所识别的GNSS信道可以用于确定GNSS接收机的位置。
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4.发明申请公开(公告)号：US20140081570A1
公开(公告)日：2014-03-20
申请号：US14088194
申请日：2013-11-22
Applicant: JAVAD GNSS, Inc.
Inventor： Javad ASHJAEE , Mikhail GRIBKOV , Lev B. RAPOPORT
IPC: G01C21/00
CPC classification number: G01C21/00 , G01C15/00 , G01C15/008 , G01C21/005 , G01S19/14
Abstract: A graphics-aided geodesic device is provided. The device includes an antenna for receiving position data from a plurality of satellites and a receiver coupled to the antenna. The device further includes orientation circuitry for obtaining orientation data. The orientation data represents an orientation of the apparatus with respect to a plane parallel with a horizon. The device further includes positioning circuitry for determining the position of the point of interest based at least on the position data and the orientation data.
Abstract translation: 提供了图形辅助测地装置。 该装置包括用于从多个卫星接收位置数据的天线和耦合到天线的接收机。 该装置还包括用于获得取向数据的定向电路。 取向数据表示装置相对于与水平线平行的平面的取向。 该装置还包括至少基于位置数据和取向数据来确定兴趣点的位置的定位电路。
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公开(公告)号：US20140077865A1
公开(公告)日：2014-03-20
申请号：US14031363
申请日：2013-09-19
Applicant: JAVAD GNSS, Inc.
Inventor： Javad ASHJAEE , Dmitry DUBROVSKY
IPC: H03H11/12
CPC classification number: H03H11/1239 , G01S19/21 , G01S19/36 , G01S19/37 , H03F2200/451
Abstract: Low-noise amplifier (LNA) filters and processes for filtering global navigation satellite system (GNSS) signals are disclosed. The LNA filters can be used to down-convert a received GNSS signal to a lower frequency, filter the GNSS signal at the lower frequency, and up-convert the GNSS signal to the original frequency of the GNSS signal. The down-converted frequency can be selected based on a temperature of the GNSS signal to compensate for shifts in the frequency response of the filter due to temperature changes.
Abstract translation: 公开了用于过滤全球导航卫星系统（GNSS）信号的低噪声放大器（LNA）滤波器和过程。 LNA滤波器可用于将接收到的GNSS信号下变频到较低频率，以较低频率滤波GNSS信号，并将GNSS信号上变频为GNSS信号的原始频率。 降频转换频率可以基于GNSS信号的温度来选择，以补偿由于温度变化引起的滤波器的频率响应的偏移。
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Patent Agency Ranking
公开(公告)号：US20140062778A1
公开(公告)日：2014-03-06
申请号：US14012499
申请日：2013-08-28
Applicant: JAVAD GNSS, INC.
Inventor： Javad ASHJAEE , Sergey YUDANOV
IPC: G01S19/20
Abstract: Systems and methods for detecting and displaying cycle slips are provided. In one example method, a first L1 signal and a second L2 signal may be received. The coarse/acquisition code from the L1 signal may be extracted and may be monitored to detect a phase shift in the code. In response to detecting a phase shift in the code, a data bit of the L1 signal may be monitored for a predetermined length of time to detect a change in the data bit. A cycle slip may be detected in response to detecting a change in the data bit during the predetermined length of time. In another example, a cycle slip may be detected in response to detecting a change between a phase of the L1 signal and a phase of the L2 signal.
Abstract translation: 提供了检测和显示循环滑移的系统和方法。 在一个示例性方法中，可以接收第一L1信号和第二L2信号。 可以提取来自L1信号的粗略/获取代码，并且可以对其进行监视以检测代码中的相移。 响应于检测到代码中的相移，可以将L1信号的数据位监视预定的时间长度，以检测数据位的变化。 响应于在预定时间长度期间检测到数据位的变化，可以检测到周期滑移。 在另一示例中，响应于检测到L1信号的相位和L2信号的相位之间的变化，可以检测周期滑移。
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公开(公告)号：US11782165B2
公开(公告)日：2023-10-10
申请号：US17235656
申请日：2021-04-20
Applicant: Javad GNSS, Inc. , Mitra Ashjay
Inventor： Javad Ashjaee
Abstract: An exemplary method of calculating a position of a GNSS device (e.g., a GNSS rover device) comprises: at the GNSS device in an enhanced real-time kinematic (RTK) mode: receiving a first set of GNSS data corresponding to a first epoch; storing the first set of GNSS data in a buffer; receiving a second set of GNSS data corresponding to a second epoch that is after the first epoch; after receiving the second set of GNSS data, retrieving the first set of GNSS data from the buffer; and calculating the position of the GNSS device based on the retrieved first set of GNSS data and the second set of GNSS data.
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公开(公告)号：US20230251088A1
公开(公告)日：2023-08-10
申请号：US18297474
申请日：2023-04-07
Applicant: Javad GNSS, Inc.
Inventor： Javad ASHJAEE
CPC classification number: G01C11/02 , G01C11/00 , G01C15/02 , G01S19/07 , G01S19/12 , G01S19/26 , G01S19/51 , G01S19/235
Abstract: A method of calibrating a total station using a GNSS device includes physically coupling the total station with the GNSS device at a first location; determining the position of the total station at the first location based on position data received by the GNSS device; decoupling the total station from the GNSS device; moving the GNSS device to a second location while leaving the total station at the first location; determining the position of the GNSS device at the second location based on position data received by the GNSS device; adjusting the position of a camera on the total station to image the GNSS device while at the second location; determining axes of the camera based on the orientation of the camera and the determined positions at the first and second locations; and calibrating encoders of the total station based on the determined axes.
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公开(公告)号：US20210325542A1
公开(公告)日：2021-10-21
申请号：US17235656
申请日：2021-04-20
Applicant: Javad GNSS, Inc.
Inventor： Javad ASHJAEE
Abstract: An exemplary method of calculating a position of a GNSS device (e.g., a GNSS rover device) comprises: at the GNSS device in an enhanced real-time kinematic (RTK) mode: receiving a first set of GNSS data corresponding to a first epoch; storing the first set of GNSS data in a buffer; receiving a second set of GNSS data corresponding to a second epoch that is after the first epoch; after receiving the second set of GNSS data, retrieving the first set of GNSS data from the buffer; and calculating the position of the GNSS device based on the retrieved first set of GNSS data and the second set of GNSS data.
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公开(公告)号：US20210123733A1
公开(公告)日：2021-04-29
申请号：US17039337
申请日：2020-09-30
Applicant: Javad GNSS, Inc
Inventor： Javad ASHJAEE
Abstract: A surveying system includes a first subsystem having a GNSS base station and an optical base station. The optical base station includes an optical sensor, a laser module, and one or more motors configured to reposition the optical sensor. The GNSS base station and the optical base station are configured to be coupleable in a first predefined configuration. The system further includes a second subsystem comprising a GNSS rover communicatively coupled to the GNSS base station and an optical rover comprising a visual pattern. The GNSS rover and the optical rover are configured to be coupleable in a second predefined configuration.
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