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公开(公告)号：US11215739B2
公开(公告)日：2022-01-04
申请号：US16556546
申请日：2019-08-30
申请人： MITUTOYO CORPORATION
发明人： Shiro Igasaki , Nobuo Ooba , Masaki Okayasu , Yuki Kurahashi
摘要： A variable focal length lens apparatus includes a liquid lens apparatus in which the refractive index changes in accordance with an input drive signal, and a refractive power controller that controls refractive power of the lens system. The refractive power controller adjusts the voltage of the drive signal in accordance with effective power that is supplied to the liquid lens apparatus.
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公开(公告)号：US09904261B2
公开(公告)日：2018-02-27
申请号：US14599790
申请日：2015-01-19
申请人： MITUTOYO CORPORATION
发明人： Shiro Igasaki
IPC分类号： G01M1/38 , G05B15/02 , G05B19/404
CPC分类号： G05B15/02 , G05B19/404
摘要： A drive controller includes a speed compensation unit that performs a speed compensation for an object based on a result of comparison made by a speed comparator that compares a current speed of the drive object with a speed indicated by a speed command. The speed compensation unit includes a position-information-based speed gain setting unit that sets a position-information-based variable gain based on position-information-based speed gain information representing a relationship between a position of the object and position-information-based variable gain that varies depending on a load torque of the motor when the object is present at a predetermined position, and a speed compensation processor that performs a speed compensation based on a result of the comparison in the speed comparator and the position-information-based variable gain set by the position-information-based speed gain setting unit.
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公开(公告)号：US11474285B2
公开(公告)日：2022-10-18
申请号：US17141507
申请日：2021-01-05
申请人： MITUTOYO CORPORATION
发明人： Shiro Igasaki , Yuki Kurahashi
摘要： A variable focal length lens device includes: a lens system of a liquid resonant type whose refractive index is changed in response to a drive signal to be inputted; a temperature sensor configured to acquire temperature information of the lens system; and a drive controller configured to control the lens system. The drive controller includes: a resonant frequency estimation unit configured to calculate an estimated value of a resonant frequency of the lens system on a basis of the temperature information; and a starting frequency setting unit configured to set a starting frequency of the lens system on a basis of the estimated value of the resonant frequency.
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公开(公告)号：US11022727B2
公开(公告)日：2021-06-01
申请号：US16549323
申请日：2019-08-23
申请人： MITUTOYO CORPORATION
发明人： Shiro Igasaki , Nobuo Ooba
摘要： A variable focal length lens apparatus includes a liquid lens apparatus in which the refractive index changes in accordance with an input drive signal, and a drive controller that outputs the drive signal to the liquid lens apparatus. The drive controller includes a resonance lock controller that changes a frequency of the drive signal by tracking the drive signal to a resonance frequency of the liquid lens apparatus, and a tracking delayer that delays a change in the frequency of the drive signal that is due to the resonance lock controller.
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公开(公告)号：US10684109B2
公开(公告)日：2020-06-16
申请号：US16008160
申请日：2018-06-14
申请人： MITUTOYO CORPORATION
发明人： Masaoki Yamagata , Shiro Igasaki
摘要： An indicator inspection machine inspects the accuracy of an indicator based on a value displayed by the indicator when a spindle changes position. The indicator inspection machine includes a measurement spindle provided so as to be freely raised and lowered in order to displace the spindle of the indicator; a contact point provided to a distalmost end of the measurement spindle, the contact point making contact with an indicator contact point provided to a distalmost end of the spindle of the indicator; a drive mechanism driving the measurement spindle; and a controller controlling the drive mechanism so as to bring the contact point into contact with the indicator contact point while changing a speed of the measurement spindle at a predetermined periodicity.
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公开(公告)号：US11193757B2
公开(公告)日：2021-12-07
申请号：US16717320
申请日：2019-12-17
申请人： MITUTOYO CORPORATION
发明人： Satoru Yoshida , Tatsuya Nagahama , Masafumi Yamanaka , Hitoshi Isobe , Naoto Oita , Koji Kubo , Yuko Shishido , Nobuo Ohba , Takahisa Ootake , Hiroki Matsui , Masanori Arai , Shiro Igasaki , Yuki Kurahashi , Hiroshi Sakai , Yutaka Watanabe
摘要： An image measurement apparatus, which functions as a non-contact profile-measuring device, includes: an image sensor as an image pick-up device; a variable focal length lens (liquid lens unit) disposed on an optical axis extending from a workpiece to the image sensor; and a controller (image-pickup lens controller and image measurement processor) configured to control the variable focal length lens and process a detected image by the image sensor. The image measurement apparatus, which also functions as a non-contact displacement-detecting device, includes: an image sensor; a variable focal length lens (liquid lens unit) disposed on an optical axis extending from the workpiece to the image sensor; and a controller (displacement-detection lens controller and profile measurement processor) configured to control the variable focal length lens and a detected image by the image sensor.
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公开(公告)号：US10908398B2
公开(公告)日：2021-02-02
申请号：US15947088
申请日：2018-04-06
申请人： MITUTOYO CORPORATION
发明人： Shiro Igasaki , Nobuo Ohba , Yuki Kurahashi
摘要： A variable focal length lens device includes: a lens system whose refractive index changes in accordance with an inputted drive signal; and a resonance-lock controller that locks the drive signal to a resonance frequency of the lens system. The resonance-lock controller tunes a frequency of the drive signal to a peak position of a voltage-current phase difference between a voltage of the drive signal and a drive current of the lens system, and raises or lowers the frequency of the drive signal in accordance with the drive current when the voltage-current phase difference changes.
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公开(公告)号：US20150205277A1
公开(公告)日：2015-07-23
申请号：US14599790
申请日：2015-01-19
申请人： MITUTOYO CORPORATION
发明人： Shiro Igasaki
IPC分类号： G05B15/02
CPC分类号： G05B15/02 , G05B19/404
摘要： A drive controller includes a speed compensation unit that performs a speed compensation for an object based on a result of comparison made by a speed comparator that compares a current speed of the drive object with a speed indicated by a speed command. The speed compensation unit includes a position-information-based speed gain setting unit that sets a position-information-based variable gain based on position-information-based speed gain information representing a relationship between a position of the object and position-information-based variable gain that varies depending on a load torque of the motor when the object is present at a predetermined position, and a speed compensation processor that performs a speed compensation based on a result of the comparison in the speed comparator and the position-information-based variable gain set by the position-information-based speed gain setting unit.
摘要翻译： 驱动控制器包括速度补偿单元，该速度补偿单元基于将速度比较器的当前速度与速度指令所指示的速度进行比较的比较结果进行对象的速度补偿。 速度补偿单元包括基于位置信息的速度增益设置单元，其基于基于位置信息的速度增益信息来设置基于位置信息的可变增益，该信息表示对象的位置与基于位置信息的关系 可变增益随着对象存在于预定位置时的电动机的负载转矩而变化;以及速度补偿处理器，其基于速度比较器中的比较结果和基于位置信息的方式执行速度补偿 由基于位置信息的速度增益设定单元设定的可变增益。
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