公开(公告)号：US5252902A

公开(公告)日：1993-10-12

申请号：US663747

申请日：1990-03-01

申请人： Shinichiro Uehara ,  Wataru Ichikawa ,  Manabu Takei

发明人： Shinichiro Uehara ,  Wataru Ichikawa ,  Manabu Takei

IPC分类号： G05B19/19 ,  G05B19/414 ,  G05D3/12 ,  G05B19/29

CPC分类号： G05B19/4141 ,  G05B2219/33155 ,  G05B2219/33187 ,  G05B2219/34244 ,  G05B2219/42062 ,  G05B2219/42237

摘要： There are provided a position and velocity control system for producing a velocity command signal in response to a position command signal and a signal representing a current position and velocity of a servo motor, a current control system for supplying a drive current to the servo motor in response to the velocity command signal, and a communication system for transmitting data between the two systems by means of a bilateral communication line. A servo control system is thereby separated between the current control system and the position and velocity control system and connected to each other through the communication system. This separation through the communication system is advantageous for protecting the position and velocity control system from influence of noise generated in the current control system and also brings about benefits such as expansion of the controllability owing to the bilateral communication, sharing of a single current control system by plural servo motors by switching connection of the servo motors and controllability of plural pairs of servo motor and current control system by a single position and velocity control system by a multi-point connection.

公开(公告)号：US5194709A

公开(公告)日：1993-03-16

申请号：US770419

申请日：1991-10-03

申请人： Wataru Ichikawa ,  Yuji Matsuki ,  Seiji Hirohashi ,  Masaru Ohara ,  Yasuyuki Mizutani ,  Yuji Taya ,  Toshiharu Nakagima ,  Shingi Hoshino

发明人： Wataru Ichikawa ,  Yuji Matsuki ,  Seiji Hirohashi ,  Masaru Ohara ,  Yasuyuki Mizutani ,  Yuji Taya ,  Toshiharu Nakagima ,  Shingi Hoshino

IPC分类号： B23K11/25 ,  B23K11/31 ,  F15B15/26

CPC分类号： F15B15/262 ,  B23K11/253 ,  B23K11/314

摘要： A decrease amount in plate thickness at a spot weld is detected at a predetermined time period when application of pressure is still maintained after termination of power supply to electrodes for spot welding. The decrease amount is correlated with the magnitude of diameter of nugget formed by spot welding, e.g., a larger diameter of nugget signifies a stronger the joint, and therefore, the quality of joint at the spot weld can be examined on the basis of the detected decrease amount. Since a value obtained by integrating plate thickness detection data of the spot weld during the predetermined time period is correlated, as the decrease amount is, with the magnitude of the diameter of a nugget, the quality of the joint may also be examined on the basis of this integrated value. There is provided, in a spot welding machine, a detector for detecting a stroke position of a cylinder for pressing electrodes or a detector for detecting a position of displacement of a tip portion of an arm interlocked with the movement of the electrodes and the distance between the electrodes, i.e., plate thickness, can be indirectly detected by the detector without adversely affecting efficiency of the spot welding work.

摘要翻译： 在针对点焊的电极供电结束后仍然保持施加压力的规定时间段，检测点焊时的板厚减少量。 减少量与通过点焊形成的熔核直径的大小相关联，例如，较大的熔核直径表示接头愈强，因此可以基于检测到的点焊检查质量 减少量 由于通过将预定时间段内的点焊板厚度检测数据整合而获得的值与减量量相关联，所以与熔核直径的大小相关联的质量也可以基于 的这个综合价值。 在点焊机中，提供用于检测用于按压电极的气缸的冲程位置的检测器或用于检测与电极的移动互锁的臂的末端部分的位移位置的检测器，以及检测器 电极，即板厚度可以由检测器间接地检测，而不会不利地影响点焊作业的效率。

公开(公告)号：US5006798A

公开(公告)日：1991-04-09

申请号：US476799

申请日：1990-02-08

申请人： Yuji Matsuki ,  Wataru Ichikawa

发明人： Yuji Matsuki ,  Wataru Ichikawa

IPC分类号： F16C29/06 ,  F16C41/00 ,  G01B7/00 ,  G01D5/14 ,  G01D5/20

CPC分类号： F16C29/0657 ,  F16C41/00 ,  G01B7/003 ,  G01D5/14

摘要： A linear guide includes a linear guide member provided over a guide range, a movable member being displaceable along the linear guide member and a ball bearing assembly provided on the movable member in a portion which comes in sliding contact with the linear guide member. A position detection device for the linear guide comprises the ball bearing assembly and a coil assembly and the ball bearing assembly has a casing and a succession of plural metallic balls disposed within the casing to form an endless ball array with each adjacent one of the balls being in close contact with another whereby the balls are linearly displaceable in accordance with displacement of the movable member. The coil assembly is provided on a part of the casing and includes a coil member which is excited by an ac signal. A magnetic path is formed through the ball located at the part of the casing and a reluctance change is produced in the magnetic path in accordance with displacement of the balls. One cycle of the reluctance change is determined by displacement corresponding to the diameter of the balls. An output signal responsive to the reluctance change is produced from the coil assembly.

公开(公告)号：US4743786A

公开(公告)日：1988-05-10

申请号：US799608

申请日：1985-11-19

申请人： Wataru Ichikawa ,  Yuji Matsuki ,  Takeo Maruyama

发明人： Wataru Ichikawa ,  Yuji Matsuki ,  Takeo Maruyama

IPC分类号： G01D5/22 ,  H02K29/12 ,  H02K39/00

CPC分类号： G01D5/225 ,  H02K29/12

摘要： This rotational position detection device comprises a stator section including primary and secondary windings and a rotor section disposed in such a manner that it is capable of performing relative rotational displacement with respect to the stator section. A conductive substance portion is provided in the form of a predetermined pattern. The amount of flux passing through the conductive substance portion of the rotor section changes in accordance with a relative rotational position of the rotor section with respect to the stator section and therefore an eddy current flows through the conductive substance portion. Reluctance is caused to change by a loss due to this eddy current and a secondary output signal corresponding to the rotational position is produced in the windings of the stator section. The pattern of the conductive substance portion can be formed easily by using electro-plating or other surface processing technique. The rotor section may be of a shape such that the rate of the reluctance change is enhanced by the combination of the magnetic substance portion and the conductive substance portion.

摘要翻译： 该旋转位置检测装置包括具有初级和次级绕组的定子部分和以能够相对于定子部分执行相对旋转位移的方式设置的转子部分。 以预定图案的形式提供导电物质部分。 根据转子部相对于定子部的相对旋转位置，通过转子部的导电性物质部的磁通量变化，涡电流流过导电性物质部。 由于这种涡流引起的损耗导致磁阻变化，并且在定子部分的绕组中产生对应于旋转位置的次级输出信号。 可以通过使用电镀或其它表面处理技术容易地形成导电物质部分的图案。 转子部分可以是通过磁性物质部分和导电物质部分的组合来提高磁阻变化率的形状。

公开(公告)号：US4695235A

公开(公告)日：1987-09-22

申请号：US914376

申请日：1986-10-01

申请人： Wataru Ichikawa ,  Yuji Matsuki ,  Yoshiaki Hirata ,  Mikiya Ito

发明人： Wataru Ichikawa ,  Yuji Matsuki ,  Yoshiaki Hirata ,  Mikiya Ito

IPC分类号： B29C33/02 ,  B29C35/02 ,  B29D30/06 ,  B29K21/00 ,  B29K105/24 ,  B29L30/00 ,  F15B15/28 ,  B29C33/20

CPC分类号： B29D30/0645 ,  F15B15/28 ,  B29C2037/90

摘要： A coil section for being excited by a primary ac signal and producing a secondary output signal is provided on the open end side of a bag-cylinder main body. A material consisting of such substance and having such configuration that bring about reluctance change of a magnetic circuit passing through the coil section in accordance with displacement of a piston rod of the bag-cylinder is provided in a predetermined pattern about the piston rod. In a detection circuit, position detection data representing the position of the piston rod is obtained in response to the secondary output signal from the coil section. In a position establishing circuit, stop position data representing a desired position at which the piston rod should be stopped is established depending upon the diameter of a tire to be vulcanized. In a comparison and control circuit, stopping of the piston rod is controlled, in a specified step in a sequence for vulcanizing the tire, in accordance with comparison between the established stop position data and the position detection data. This control device can readily cope with tires of different diameters simply by changing the stop position data.

摘要翻译： 在气缸主体的开口端设置有用于被主交流信号激励并产生次级输出信号的线圈部。 按照活塞杆周围的预定图案设置由这种物质组成的材料，并且具有这样一种构造，使得通过线圈部分的磁路根据活塞杆的位移导致磁路的磁阻变化。 在检测电路中，响应于来自线圈段的次级输出信号，获得表示活塞杆的位置的位置检测数据。 在一个位置建立回路中，根据待硫化轮胎的直径，建立表示活塞杆停止的期望位置的停止位置数据。 在比较控制电路中，根据建立的停止位置数据与位置检测数据的比较，按照用于硫化轮胎的顺序的规定步骤来控制活塞杆的停止。 该控制装置可以简单地通过改变停止位置数据来容易地处理不同直径的轮胎。

公开(公告)号：US4951048A

公开(公告)日：1990-08-21

申请号：US394205

申请日：1989-08-15

申请人： Wataru Ichikawa ,  Yuji Matsuki

发明人： Wataru Ichikawa ,  Yuji Matsuki

IPC分类号： G01B7/00 ,  G01D5/245 ,  G01D5/249 ,  H03M1/00

CPC分类号： F15B15/2861 ,  F15B15/2846 ,  H03M1/287

摘要： A first pattern which repeats change in the longitudinal direction with a predetermined pitch and a second pattern which changes in the longitudinal direction with a pitch which is different at least from that of the first pattern, both formed of a predetermined material, are disposed on a surface of a rod section. A detection head section is provided in proximity to the rod section, responds individually to the first pattern and the second pattern, changes its relation of correspondence to the respective patterns in accordance with its linear position with respect to the rod section and produces output signals in accordance with the relation of correspondence to the respective patterns. In accordance with the output signals corresponding to the respective patterns, first and second absolute position data of different ranges whose one cycle is constituted of one pitch of the respective patterns can be obtained. By combining these absolute position data, linear position of the detection head section with respect to the rod section can be specified in an absolute value. By disposing the first and second patterns in a mixed state on a single rod section, the construction of the device can be simplified.

公开(公告)号：US4717874A

公开(公告)日：1988-01-05

申请号：US698078

申请日：1985-02-04

申请人： Wataru Ichikawa ,  Yuji Matsuki

发明人： Wataru Ichikawa ,  Yuji Matsuki

IPC分类号： B60G17/019 ,  F15B15/28 ,  G01B7/00 ,  G01B7/02 ,  G01D5/20 ,  G08C19/06 ,  G01B7/14

CPC分类号： F15B15/2861 ,  B60G17/01933 ,  F15B15/2846 ,  G01B7/003 ,  G01B7/02 ,  G01D5/2013 ,  G01D5/202 ,  B60G2204/112 ,  B60G2400/252 ,  B60G2401/17

摘要： This detection device comprises a coil section and a rod section which is capable of linear displacement relative to the coil section. The rod section has a magnetic substance portion changing reluctance of a magnetic circuit passing through the coil section in accordance with the linear displacement and a conductive substance portion provided in part of the rod section where the reluctance is caused to increase relatively in such a manner that an eddy current path will be formed relative to flux. By this arrangement, in places where reluctance increases due to absence of the magnetic substance, reluctance is caused to further increase by the eddy current loss produced by presence of the conductive substance portion whereby the secondary side induced voltage level is further attenuated and the accuracy of detection can be improved. The rod section may be so constructed as to produce only the reluctance change due to the conductive substance portion. This detection device is applicable to detection of a piston rod position of a fluid powered cylinder.

摘要翻译： 该检测装置包括线圈部分和能够相对于线圈部分线性位移的杆部分。 杆部具有磁性体部分，其根据线性位移改变通过线圈部分的磁路的磁阻，并且设置在使得磁阻的部分中的部分中的导电物质部分相对增加，使得 将形成相对于通量的涡流通路。 通过这种布置，在由于不存在磁性物质而导致磁阻增大的地方，由于导电物质部分的存在而产生的涡流损耗导致磁阻进一步增大，从而次级侧感应电压电平进一步衰减，并且精度 检测可以改善。 杆部分可以被构造成仅由于导电物质部分而产生磁阻变化。 该检测装置适用于检测流体动力缸的活塞杆位置。

公开(公告)号：US5349293A

公开(公告)日：1994-09-20

申请号：US934960

申请日：1992-08-25

申请人： Shuichi Tanaka ,  Wataru Ichikawa

发明人： Shuichi Tanaka ,  Wataru Ichikawa

IPC分类号： G01B7/00 ,  G01B7/30 ,  G01D5/20 ,  G01D5/22 ,  G01D5/245

CPC分类号： G01B7/30 ,  G01D5/2216 ,  G01D5/2225

摘要： Primary coils generate flux upon being excited by a predetermined ac signal. A stator is made in a plate-like configuration and has plural primary coils independently in the circumferential direction so that flux is generated by the primary coils in the direction of the axis of rotation. A rotor is provided displaceably relative to the primary coils to change reluctance with respect to the flux generated by the primary coils. Accordingly, as the rotor is rotated, reluctance change is produced due to the relative positional relation between the primary coils provided in the stator and the rotor. This reluctance change causes to change self-inductance of the primary coils and affects the exciting ac signal flowing through the primary coils and, therefore, by outputting the self-induced ac signal in the primary coils, the relative positional relation between the rotor and the primary coils, i.e., the rotational position of the rotor, can be detected.

摘要翻译： 初级线圈在被预定的ac信号激励时产生通量。 定子被制成板状构造，并且在圆周方向上独立地具有多个初级线圈，使得在初级线圈沿着旋转轴线的方向产生磁通。 转子相对于初级线圈可移位地设置，以相对于由初级线圈产生的磁通来改变磁阻。 因此，随着转子旋转，由于设置在定子和转子中的初级线圈之间的相对位置关系，产生磁阻变化。 该磁阻变化导致初级线圈的自感变化，并且影响流过初级线圈的励磁交流信号，因此通过在初级线圈中输出自感应交流信号，转子与转子之间的相对位置关系 可以检测初级线圈，即转子的旋转位置。

公开(公告)号：US4879555A

公开(公告)日：1989-11-07

申请号：US893254

申请日：1986-08-04

申请人： Wataru Ichikawa ,  Yuji Matsuki

发明人： Wataru Ichikawa ,  Yuji Matsuki

IPC分类号： G01B7/00 ,  G01D5/245 ,  G01D5/249 ,  H03M1/00

CPC分类号： F15B15/2861 ,  F15B15/2846 ,  H03M1/287

摘要： A first pattern which repeats change in the longitudinal direction with a predetermined pitch and a second pattern which changes in the longitudinal direction with a pitch which is different at least from that of the first pattern; both formed of a predetermined material, are disposed on a surface of a rod section. A detection head section is provided in proximity to the rod section, responds individually to the first pattern and the second pattern, changes its relation of correspondence to the respective patterns in accordance with it linear position with respect to the rod section and produces output signals in accordance with the relation of correspondence to the respective patterns. In accordance with the output signals corresponding to the respective patterns, first and secondd absolute position data of different ranges whose one cycle is constituted of one pitch of the respective patterns can be obtained. By combining these absolute position data, linear position of the detection head section with respect to the rod section can be specified in an absolute value. By disposing the first and second patterns in a mixed state on a single rod section, the construction of the device can be simplified.

摘要翻译： 以预定间距重复纵向变化的第一图案和至少与第一图案不同的节距沿纵向方向改变的第二图案; 两者均由预定材料形成，设置在杆部分的表面上。 检测头部分设置在杆部分附近，单独响应于第一图案和第二图案，根据其相对于杆部分的线性位置改变其与各个图案的对应关系，并产生输出信号 根据对应关系与各自的模式。 根据对应于各个图案的输出信号，可以获得其一个周期由各个图案的一个间距构成的不同范围的第一和第二绝对位置数据。 通过组合这些绝对位置数据，检测头部相对于杆部的线性位置可以被指定为绝对值。 通过将第一和第二图案以混合状态设置在单个杆部分上，可以简化装置的结构。

公开(公告)号：US4764767A

公开(公告)日：1988-08-16

申请号：US899517

申请日：1986-08-22

申请人： Wataru Ichikawa ,  Yuji Matsuki

发明人： Wataru Ichikawa ,  Yuji Matsuki

IPC分类号： G01B7/00 ,  G01B7/30 ,  G01D5/20 ,  G01D5/243 ,  G01D5/245 ,  H03M1/00 ,  G08C19/06

CPC分类号： H03M1/485 ,  H03M1/308

摘要： On a circumferential side surface of a single cylindrical member constituting a main body of a rotor section are disposed, in parallel, a first pattern which repeats change in the circumferential direction with a predetermined pitch and a second pattern which has a change of one cycle with respect to one circumference. A detection head section which is provided in proximity to the rotor section changes its relation of correspondence to the respective patterns in accordance with rotational position of the rotor section and produces output signals corresponding to the relation of correspondence. A relatively rough absolute value of a rotational position within one rotation is established by an output signal produced in response to the second pattern and its accuracy is established with a high resolution by an output signal produced in response to the first pattern. By disposing the first and second patterns in parallel on the single cylindrical member of the rotor section, the construction of the device can be simplified.

摘要翻译： 在构成转子部分的主体的单个圆柱形部件的圆周侧表面上平行布置以预定间距重复周向变化的第一图案和具有一个周期变化的第二图案， 尊重一周。 设置在转子部附近的检测头部根据转子部的旋转位置而改变与各图案的对应关系，并产生与对应关系对应的输出信号。 通过响应于第二图案产生的输出信号建立一个旋转内的旋转位置的相对粗略的绝对值，并且通过响应于第一图案产生的输出信号以高分辨率建立其精度。 通过将第一和第二图案平行地设置在转子部分的单个圆柱形构件上，可以简化装置的结构。