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公开(公告)号：US11703600B2
公开(公告)日：2023-07-18
申请号：US17670984
申请日：2022-02-14
Applicant: CASIO COMPUTER CO., LTD.
Inventor： Takeshi Matsue
CPC classification number: G01S19/396 , G01S19/34
Abstract: A satellite radio wave receiving device including: one or more processors configured to: cause a receiver to start a receiving operation of receiving radio waves from positioning satellites; perform a current position calculation to calculate a current position based on the radio waves received; calculate a positioning accuracy of the current position; decide whether or not to adopt the current position based on a number of positioning satellites from which the receiver has received radio waves and the positioning accuracy; in response to deciding to adopt the current position, cause the receiver to stop the receiving operation; and in response to deciding to not adopt the current position, cause the receiver to continue the receiving operation of receiving radio waves from the positioning satellites and repeat performance of the current position calculation to calculate current positions based on the radio waves received during the continued receiving operation.
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公开(公告)号：US10261190B2
公开(公告)日：2019-04-16
申请号：US15893419
申请日：2018-02-09
Applicant: CASIO COMPUTER CO., LTD.
Inventor： Takeshi Matsue
Abstract: A processor of a satellite radio wave receiving device processes radio waves received by a receiver to identify a bit value in each of divided unit time segments that are obtained by dividing a time period of one bit into a plurality of unit time segments of equal duration; creates a bit array having the identified bit values in respective divided unit time segments by sequentially arranging the identified bit values in an order of receipt, the one or more processors creating said bit array in a plurality by successively shifting a time at which the bit array starts by one unit time segment; and performs a bit edge detection operation by detecting a head timing of the bit data at which a bit value changes in the received radio waves based on said plurality of bit value arrays.
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3.发明授权公开(公告)号：US09952561B2
公开(公告)日：2018-04-24
申请号：US15389515
申请日：2016-12-23
Applicant: CASIO COMPUTER CO., LTD.
Inventor： Tatsuya Sekitsuka , Takeshi Matsue
IPC: G04C11/00 , G04R20/06 , H04B10/118
CPC classification number: G04R20/06 , G04C11/02 , H04B10/118
Abstract: A radio timepiece, including: a satellite radio wave receiver; a ground wave receiver; a memory; and a controller, wherein the controller performs area determination operation of determining whether a current position is located within a geographical range where the ground wave receiver is capable of acquiring notice information regarding implementation/non-implementation of the leap second adjustment, when the controller determines that the current position is located within the geographical range, the controller controls the ground wave receiver to acquire the notice information, the controller determines, with the notice information, whether the leap second adjustment is scheduled to be implemented at an implementation candidate timing of the leap second adjustment, and when the controller determines that the leap second adjustment is scheduled to be implemented, the controller changes the leap second correction information at or after the implementation candidate timing.
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公开(公告)号：US12183971B2
公开(公告)日：2024-12-31
申请号：US17199969
申请日：2021-03-12
Applicant: CASIO COMPUTER CO., LTD.
Inventor： Takeshi Matsue
Abstract: Provided is an antenna reception device including an antenna, a board including three or more electrodes, and two connectors that respectively connect two of the electrodes to the antenna. The electrodes include a first electrode that is connected to a ground and a second electrode that is connected to a feed point. The board includes a first signal line between the ground and the first electrode and a second signal line between the feed point and the second electrode. The electrodes include two or more first electrodes and/or two or more second electrodes, and the board includes two or more respective first signal lines with different lengths and/or two or more respective second signal lines with different lengths.
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公开(公告)号：US10890666B2
公开(公告)日：2021-01-12
申请号：US16135229
申请日：2018-09-19
Applicant: CASIO COMPUTER CO., LTD.
Inventor： Tatsuya Sekitsuka , Takeshi Matsue
Abstract: A satellite radiowave receiving device includes a receiver performing a receiving operation of radiowaves transmitted from a positioning satellite and a processor controlling a positioning operation. The processor performs the positioning operation within at least a predetermined maximum positioning interval from a last positioning operation using preliminarily obtained date and time information and valid positional information on the positioning satellite to obtain a current position of the satellite radiowave receiving device and date and time information. The processor causes the receiver to perform the receiving operation within at least a predetermined date and time updating interval shorter than the predetermined maximum positioning interval from a last time when date and time information is obtained from radiowaves transmitted from a positioning satellite to obtain date and time information without the positioning operation.
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Patent Agency Ranking
公开(公告)号：US10663598B2
公开(公告)日：2020-05-26
申请号：US15988580
申请日：2018-05-24
Applicant: CASIO COMPUTER CO., LTD.
Inventor： Takeshi Matsue , Tatsuya Sekitsuka
Abstract: Provided is an electronic device includes an oscillator circuit that outputs a clock signal of predetermined frequency, a clock circuit that counts date and time in accordance with input of the clock signal, a temperature sensor that measures a temperature relating to a change of the predetermined frequency, a receiver that receives a radio wave from a positioning satellite, and a first processor and/or a second processor. The first processor and/or the second processor estimates an amount of time count difference in date and time counted by the clock circuit on the basis of a history of temperatures measured by the temperature sensor, and combines date and time counted by the clock circuit, the estimated amount of time count difference, and part of date-and-time information obtained from a radio wave received by the receiver to identify current date and time.
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公开(公告)号：US10372087B2
公开(公告)日：2019-08-06
申请号：US15388693
申请日：2016-12-22
Applicant: CASIO COMPUTER CO., LTD.
Inventor： Tatsuya Sekitsuka , Takeshi Matsue , Yuki Oshita
Abstract: A satellite radio wave receiving device includes: a receiver that receives a satellite radio wave to identify a reception signal; and a processor that acquires primary date and time information from the identified reception signal and outputs a date and time notifying signal indicating date and time based on the primary date and time information to an outside of the satellite radio wave receiving device. The date and time notifying signal includes at least a timing notifying signal indicating a predetermined timing. The processor determines the predetermined timing without consideration of a timing of a second synchronization point which is a leading edge of every second in the date and time based on the primary date and time information, and outputs the timing notifying signal at the predetermined timing.
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8.发明授权公开(公告)号：US10317850B2
公开(公告)日：2019-06-11
申请号：US15660055
申请日：2017-07-26
Applicant: CASIO COMPUTER CO., LTD.
Inventor： Takeshi Matsue
Abstract: A positioning apparatus includes the following. A first oscillator outputs a clock signal. A second oscillator outputs a clock signal which is more accurate than the first oscillator. A receiver receives a radio wave from a positioning satellite. A positioning controller calculates a present position based on positioning information calculated from the received radio wave. The positioning controller controls switching of a supply source of the clock signal supplied to the receiver and the positioning controller between the first oscillator and the second oscillator depending on a reception status of the radio wave from the positioning satellite by the receiver.
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公开(公告)号：US10120346B2
公开(公告)日：2018-11-06
申请号：US15381912
申请日：2016-12-16
Applicant: CASIO COMPUTER CO., LTD.
Inventor： Takeshi Matsue , Hideo Abe , Tatsuya Sekitsuka
IPC: H04B1/00 , G04R20/04 , H04B1/7073 , H04B7/185 , G01S19/37 , H04B1/7075 , G01S19/30
Abstract: A satellite radio wave receiving processing unit 60 includes a front end 60a which receives a radio wave including a code signal transmitted from a satellite, and a baseband unit 64 which acquires the code signal from the received radio wave, in which the baseband unit identifies a pseudo-random code sequence used for performing spread spectrum to the code signal and a phase of the pseudo-random code sequence in a transmission period, identifies a code type of the code signal every time according to the transmission period, identifies, by comparing an array of the identified code type with a plurality of comparison arrays expected to appear as the array of the code type, a head timing of each code in the code signal according to a comparison array in which a result of the comparison satisfies a predetermined condition, and identifies each code in synchronization with the identified head timing.
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10.发明授权公开(公告)号：US11726434B2
公开(公告)日：2023-08-15
申请号：US16139245
申请日：2018-09-24
Applicant: CASIO COMPUTER CO., LTD.
Inventor： Takeshi Matsue , Tatsuya Sekitsuka
CPC classification number: G04R20/04 , G01S19/256
Abstract: A satellite radiowave receiving device includes a receiver receiving radiowaves transmitted from a positioning satellite; and a processor performing a positioning operation using the radiowaves received by the receiver. If the receiver starts receiving radiowaves for the positioning operation, the processor obtains date and time information based on radiowaves received from a single positioning satellite after the receiver starts receiving radiowaves. The processor preforms a positioning calculation using the obtained date and time information and preliminarily retained positional information on the positioning satellite.
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