Patents by Inventor Shinichi Mitsunaga
Shinichi Mitsunaga has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230417794Abstract: An inertial sensor module includes: a first inertial sensor; a second inertial sensor; and a processing device configured to receive a first detection signal output from the first inertial sensor and a second detection signal output from the second inertial sensor, and output measurement data based on the first detection signal and the second detection signal and based on output instruction information received from outside. The processing device is configured to output the measurement data in a format corresponding to output format selection information received from the outside.Type: ApplicationFiled: June 26, 2023Publication date: December 28, 2023Inventor: Shinichi MITSUNAGA
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Publication number: 20230099359Abstract: An inertial sensor module includes a first sensor, a second sensor, and a processing circuit. The first sensor detects, with a first sensitivity, a first physical quantity at a first detection axis and a second physical quantity at a second detection axis. The second sensor detects, with a second sensitivity different from the first sensitivity, a third physical quantity at a third detection axis with a higher accuracy than the first sensor. The processing circuit performs arithmetic processing that is processing of converting the first physical quantity and the second physical quantity at the first sensitivity and the third physical quantity at the second sensitivity into a first physical quantity, a second physical quantity, and a third physical quantity at a predetermined sensitivity.Type: ApplicationFiled: September 29, 2022Publication date: March 30, 2023Inventor: Shinichi MITSUNAGA
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Publication number: 20160089566Abstract: A sensor unit includes: a measuring unit; a first buffer which saves measured data measured by the measuring unit when outputting the measured data outside; a second buffer; and an output mode switching unit which switches an output mode for outputting the measured data outside. The output mode includes a real-time mode (first mode) in which the first buffer is overwritten with the measured data if there is no free space in the first buffer, and a buffering mode (second mode) in which the measured data is written in the second buffer if there is no free space in the first buffer and in which the measured data written in the second buffer is transferred to the first buffer if a free space is generated in the first buffer.Type: ApplicationFiled: September 8, 2015Publication date: March 31, 2016Inventors: Shinichi MITSUNAGA, Kazuhiro SHIBUYA
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Patent number: 8164513Abstract: An evaluation point E of a present position candidate corresponding to each satellite set is calculated based on an a priori residual (APR) (APR value), a PDOP value, and the number of satellites of the target satellite set according to E=k1·f1(APR)+k2·f2(PDOP)+k3·f3(number of satellites). Evaluation coefficients k1 to k3 for respectively weighting evaluation functions f1 to f3 are determined based on an APR average value.Type: GrantFiled: October 9, 2009Date of Patent: April 24, 2012Assignee: Seiko Epson CorporationInventors: Shinichi Mitsunaga, Mikio Nagahara
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Patent number: 8072372Abstract: In the first positioning, a positioning process that calculates the present position based on acquired GPS satellite signals (step A3) is performed a plurality of times. A number of times that the difference (position difference) ?P between the calculated present located position and the preceding located position is successively equal to or less than a given value is counted using a position counter, and a number of times that the difference (time difference) ?T between the present time error and the preceding time error is successively equal to or less than a given value is counted using a time counter each time the positioning process is performed (step A5). A position threshold value and a time threshold value are determined by changing a reference threshold value by an amount corresponding to an APR average value (step A7).Type: GrantFiled: September 23, 2009Date of Patent: December 6, 2011Assignee: Seiko Epson CorporationInventors: Mikio Nagahara, Shinichi Mitsunaga
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Patent number: 7884759Abstract: A reception environment is determined to be a multipath environment when the difference (positioning altitude difference) between the maximum value (maximum altitude) and the minimum value (minimum altitude) of the altitudes of candidate present positions P of respective satellite sets exceeds a given threshold value (e.g., 200 m), and is determined to be an open-sky environment when the positioning altitude difference is equal to or less than the given threshold value. When the reception environment is the open-sky environment, an evaluation point E of each satellite set is calculated using a known evaluation method based on the number of satellites, a PDOP value, and the like.Type: GrantFiled: April 19, 2010Date of Patent: February 8, 2011Assignee: Seiko Epson CorporationInventor: Shinichi Mitsunaga
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Publication number: 20100214167Abstract: A reception environment is determined to be a multipath environment when the difference (positioning altitude difference) between the maximum value (maximum altitude) and the minimum value (minimum altitude) of the altitudes of candidate present positions P of respective satellite sets exceeds a given threshold value (e.g., 200 m), and is determined to be an open-sky environment when the positioning altitude difference is equal to or less than the given threshold value. When the reception environment is the open-sky environment, an evaluation point E of each satellite set is calculated using a known evaluation method based on the number of satellites, a PDOP value, and the like.Type: ApplicationFiled: April 19, 2010Publication date: August 26, 2010Applicant: SEIKO EPSON CORPORATIONInventor: Shinichi MITSUNAGA
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Patent number: 7728768Abstract: A reception environment is determined to be a multipath environment when the difference (positioning altitude difference) between the maximum value (maximum altitude) and the minimum value (minimum altitude) of the altitudes of candidate present positions P of respective satellite sets exceeds a given threshold value (e.g., 200 m), and is determined to be an open-sky environment when the positioning altitude difference is equal to or less than the given threshold value. When the reception environment is the open-sky environment, an evaluation point E of each satellite set is calculated using a known evaluation method based on the number of satellites, a PDOP value, and the like.Type: GrantFiled: April 17, 2008Date of Patent: June 1, 2010Assignee: Seiko Epson CorporationInventor: Shinichi Mitsunaga
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Publication number: 20100079335Abstract: An evaluation point E of a present position candidate corresponding to each satellite set is calculated based on an a priori residual (APR) (APR value), a PDOP value, and the number of satellites of the target satellite set according to E=k1·f1(APR)+k2·f2(PDOP)+k3·f3(number of satellites). Evaluation coefficients k1 to k3 for respectively weighting evaluation functions f1 to f3 are determined based on an APR average value.Type: ApplicationFiled: October 9, 2009Publication date: April 1, 2010Applicant: SEIKO EPSON CORPORATIONInventors: Shinichi MITSUNAGA, Mikio NAGAHARA
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Publication number: 20100007557Abstract: In the first positioning, a positioning process that calculates the present position based on acquired GPS satellite signals (step A3) is performed a plurality of times. A number of times that the difference (position difference) ?P between the calculated present located position and the preceding located position is successively equal to or less than a given value is counted using a position counter, and a number of times that the difference (time difference) ?T between the present time error and the preceding time error is successively equal to or less than a given value is counted using a time counter each time the positioning process is performed (step A5). A position threshold value and a time threshold value are determined by changing a reference threshold value by an amount corresponding to an APR average value (step A7).Type: ApplicationFiled: September 23, 2009Publication date: January 14, 2010Applicant: Seiko Epson CorporationInventors: Mikio NAGAHARA, Shinichi MITSUNAGA
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Publication number: 20090322607Abstract: A reception environment is determined to be a multipath environment when the difference (positioning altitude difference) between the maximum value (maximum altitude) and the minimum value (minimum altitude) of the altitudes of candidate present positions P of respective satellite sets exceeds a given threshold value (e.g., 200 m), and is determined to be an open-sky environment when the positioning altitude difference is equal to or less than the given threshold value. When the reception environment is the open-sky environment, an evaluation point E of each satellite set is calculated using a known evaluation method based on the number of satellites, a PDOP value, and the like.Type: ApplicationFiled: April 17, 2008Publication date: December 31, 2009Applicant: SEIKO EPSON CORPORATIONInventor: Shinichi MITSUNAGA
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Patent number: 7623069Abstract: An evaluation point E of a present position candidate corresponding to each satellite set is calculated based on an a priori residual (APR) (APR value), a PDOP value, and the number of satellites of the target satellite set according to E=k1·f1(APR)+k2·f2(PDOP)+k3·f3(number of satellites). Evaluation coefficients k1 to k3 for respectively weighting evaluation functions f1 to f3 are determined based on an APR average value.Type: GrantFiled: April 3, 2008Date of Patent: November 24, 2009Assignee: Seiko Epson CorporationInventors: Shinichi Mitsunaga, Mikio Nagahara
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Patent number: 7612713Abstract: In the first positioning, a positioning process that calculates the present position based on acquired GPS satellite signals (step A3) is performed a plurality of times. A number of times that the difference (position difference) ?P between the calculated present located position and the preceding located position is successively equal to or less than a given value is counted using a position counter, and a number of times that the difference (time difference) ?T between the present time error and the preceding time error is successively equal to or less than a given value is counted using a time counter each time the positioning process is performed (step A5). A position threshold value and a time threshold value are determined by changing a reference threshold value by an amount corresponding to an APR average value (step A7).Type: GrantFiled: April 3, 2008Date of Patent: November 3, 2009Assignee: Seiko Epson CorporationInventors: Mikio Nagahara, Shinichi Mitsunaga
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Publication number: 20090040104Abstract: An evaluation point E of a present position candidate corresponding to each satellite set is calculated based on an a priori residual (APR) (APR value), a PDOP value, and the number of satellites of the target satellite set according to E=k1·f1(APR)+k2·f2(PDOP)+k3·f3(number of satellites). Evaluation coefficients k1 to k3 for respectively weighting evaluation functions f1 to f3 are determined based on an APR average value.Type: ApplicationFiled: April 3, 2008Publication date: February 12, 2009Applicant: SEIKO EPSON CORPORATIONInventors: Shinichi MITSUNAGA, Mikio NAGAHARA
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Publication number: 20080246661Abstract: In the first positioning, a positioning process that calculates the present position based on acquired GPS satellite signals (step A3) is performed a plurality of times. A number of times that the difference (position difference) ?P between the calculated present located position and the preceding located position is successively equal to or less than a given value is counted using a position counter, and a number of times that the difference (time difference) ?T between the present time error and the preceding time error is successively equal to or less than a given value is counted using a time counter each time the positioning process is performed (step A5). A position threshold value and a time threshold value are determined by changing a reference threshold value by an amount corresponding to an APR average value (step A7).Type: ApplicationFiled: April 3, 2008Publication date: October 9, 2008Applicant: SEIKO EPSON CORPORATIONInventors: Mikio NAGAHARA, Shinichi MITSUNAGA