专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

81. 发明专利

JPH10227805A ROTATION SENSOR 失效
公开(公告)号：JPH10227805A
公开(公告)日：1998-08-25
申请号：JP3393497
申请日：1997-02-18
申请人： TOYOTA MOTOR CORP
发明人： TERADA YASUHARU
IPC分类号： G01P3/488 , G01D5/245
摘要： PROBLEM TO BE SOLVED: To provide a rotation sensor which achieves a higher accuracy of detecting the rotating condition of an object to be detected by using a single magnetism detecting means. SOLUTION: This sensor is provided with a magnet 4 for forming a magnetic field, a magnetoresistance element 5 arranged with the surface thereof vertical to the direction of the magnetic field, a rotor 3 which is rotated together with a rotating shaft 2 as an object to be detected to move a protruded part 31 in the direction of crossing the magnetic field for changing the direction of the magnetic field and an arithmetic circuit 6 to compute the rotating condition of the rotor 2 based on a detection signal to be outputted from the magnetoresistance element 5. With such as arrangement, where the protruded part 31 passes near the magnetoresistance element 5, a detection signal having more than one external values is outputted from the magnetoresistance element 5. Thus, a higher accuracy is achieved by a single magnetism detecting means in a state where the rotating shaft 2 is rotated by detecting the rotation based on the detection signal.

82. 发明专利

JPH1010141A MAGNETIC ROTATION DETECTOR 失效
公开(公告)号：JPH1010141A
公开(公告)日：1998-01-16
申请号：JP30838496
申请日：1996-11-19
申请人： TOYOTA MOTOR CORP
发明人： MORIMOTO YASUO , TERADA YASUHARU
IPC分类号： G01P3/487 , G01D5/245
摘要： PROBLEM TO BE SOLVED: To obtain many pulse signals per one rotation with a simple circuit constitution. SOLUTION: A plurality of magnetoresistance elements 20 and 30 are arranged at the positions, which are separated by the non-integer times of one magnetic-pole width of an N pole and an S pole so as to face the magnetized surface, where the N pole and the S pole are alternately magnetized on a rotary body along the rotating direction. The magnetoresistive elements 20 and 30 have artificial grid films 22 and 32, wherein magnetic bodies and non-magnetic bodies are alternately laminated. The artificial grid films 22 and 32 are connected in series to each other. An the same timer, a constant current is made no flow through the artificial grid films 22 and 32 by a constant current source circuit 61. The pulse-train signal in correspondence with the change in resistance values of the magnetoresistive elements 20 and 30 accompanied by the rotation of the rotary body is obtained by the voltage change across both terminals of the artificial grid films 22 and 32.

83. 发明专利

JPH07139988A LIQUID LEVEL DETECTOR 失效
公开(公告)号：JPH07139988A
公开(公告)日：1995-06-02
申请号：JP28707493
申请日：1993-11-16
申请人： TOYOTA MOTOR CORP
发明人： TERADA YASUHARU
IPC分类号： G01F23/22 , F01M11/12 , F02B77/08
摘要： PURPOSE:To constantly prevent erroneous detection caused by the fluctuation/ behavior of a liquid level by providing at least one portion of a thermistor at the lower part of a reference liquid level. CONSTITUTION:Since a reference liquid level BL is provided above the lowest point of a thermistor 22, no conduction is made to light up a warning lamp until an atmospheric temperature around a thermistor 2 reaches a specific value even if a read switch 21 is turned on by mistake. At the atmospheric temperature where the thermistor 22 lights up the lamp, oil increase is eliminated by the temperature so that a float 35 takes a position according to the normal amount of oil before the thermistor 22 energizes the circuit, the read switch 21 is normally operated and is turned off, and the lamp is not lit even if oil increase is generated. The thermistor 22 shows a large resistance at a temperature region where oil increase is generated, thus avoiding the energization of the circuit and preventing erroneous detection due to oil increase.

84. 发明专利

JP2002125353A ELECTRIC MOTOR 失效
公开(公告)号：JP2002125353A
公开(公告)日：2002-04-26
申请号：JP2000313398
申请日：2000-10-13
申请人： TOYOTA MOTOR CORP
发明人： TERADA YASUHARU
IPC分类号： H02K1/16 , H02K1/18 , H02K1/22 , H02K1/27 , H02K3/12 , H02K3/34 , H02K3/50 , H02K5/22 , H02K11/00 , H02K21/14
摘要： PROBLEM TO BE SOLVED: To improve the motor performance of an electric motor and to improve assemblability of the motor. SOLUTION: This electric motor has a rotor, incorporated rotatably in a housing and a stator placed coaxially with the rotor and incorporated incapable of rotation in the housing. The stator has a plurality of teeth 31a, arranged radially with the rotation center of the rotor as the center of the arrangement, a circular yoke 31b connecting the respective radial direction ends of the teeth 31a with each other, and a plurality of coils wound on the teeth 31a in slots S formed between the respective teeth 31a. The yoke 31b of the stator and the respective teeth 31a are integrally formed.

85. 发明专利

JPH10227809A ROTATING CONDITION DETECTOR 失效
公开(公告)号：JPH10227809A
公开(公告)日：1998-08-25
申请号：JP3394297
申请日：1997-02-18
申请人： TOYOTA MOTOR CORP
发明人： TERADA YASUHARU
IPC分类号： G01P3/487 , G01D5/244 , G01D5/245 , G01P13/04
摘要： PROBLEM TO BE SOLVED: To provide a rotating condition detector which enables detecting of the direction of the rotation of an object to be detected. SOLUTION: This apparatus is provided with a rotor 3 which generates a magnetic field varying according to the rotation of a rotating shaft 2 as an object to be detected, a magnetoresistance element 4 to output a detection signal addressing changes in the magnetic field arranged in the magnetic field generated by the rotor 3 and an arithmetic circuit 5 to compute the rotating condition of the object to be detected based on the detection signal. With the rotation of the rotating shaft 2, the magnetic field applied to the magnetoresistance element 4 by the rotor 3 is changed to output a detection signal having at least three kinds of extremal values to the magnetoresistance element 4 while the extremal values are detected in the different order based on a difference in the direction of the rotating shaft 2 rotates. This enables judging of the directions of the rotating shaft 2 rotates by detecting the order in which the extremal values appear.

86. 发明专利

JPH10227807A ROTATION SENSOR 失效
公开(公告)号：JPH10227807A
公开(公告)日：1998-08-25
申请号：JP3394697
申请日：1997-02-18
申请人： TOYOTA MOTOR CORP
发明人： TERADA YASUHARU
IPC分类号： G01P3/488 , G01D5/245
摘要： PROBLEM TO BE SOLVED: To provide a rotation sensor which achieves a higher detection accuracy in the detection of the rotating condition of an object to be detected. SOLUTION: Different magnetic poles 41a and 42a are arranged being separated near the outer circumference of a rotor 3 mounted on a rotating shaft 2 as an object to be detected and a magnetoresistance element 5 is arranged in a magnetic field by the magnetic poles 41a and 42a with the surface thereof vertical. At this point, as a protruded part 31 moves with the rotation of the rotating shaft 2 and the rotor 3, the magnetic field by the magnetic poles 41a and 42a varies cyclically with the movement thereof so that the direction of the magnetic field working on the magnetoresistance element 5 cyclically changes. As two extremal values are outputted from the magnetoresistance element 5 at the first cycle of changes in the magnetic field, a higher accuracy achieved in the detecting of the rotating condition of the object to be detected is achieved by detecting the extremal values.

87. 发明专利

JPH10206448A MAGNETIC ROTATIONAL SPEED SENSOR 失效
公开(公告)号：JPH10206448A
公开(公告)日：1998-08-07
申请号：JP8135197
申请日：1997-03-31
申请人： TOYOTA MOTOR CORP
发明人： SEKIYA ICHIRO , MURATA TAKAHITO , TERADA YASUHARU
IPC分类号： G01P3/487 , G01D5/244 , G01D5/245 , G01P3/489
摘要： PROBLEM TO BE SOLVED: To reduce errors produced along with counting timing by a magnetic reluctance element spanning a predetermined size of a magnetic field at a plurality of times during magnetic variation in a half period. SOLUTION: A magnet loop 1 fixed to a rotate is rotated about the rotary axis of the rotor and formed on the one end surface with ruggednes to the projection parts of which are magnetically attached N poles. Magnetoresistance elements 2 provided in positions opposed to the rugged surface are formed with line paths 13 having electrodes 11, 12 on both ends respectively. The line path 13 is in the strongest magnetic field and the resistance value is low when the line path 13 is in the position opposed to the central part of the projection part. When the magnet loop 1 is rotated and the line path 13 approaches the edge of the projection part, the magnetic field is weakened to provide the highest resistance value. Further, the resistance value is reduced by the rotation of the magnetic loop 1 when the line path is opposed to the projection part and maximized again near the edge of the next projection part. That is, the line path spans at least two times a predetermined size of the magnetic field during the half period variation of the magnetic field to obtain two times of peak values. A signal process circuit 4 outputs pulse signals respectively at the two times of the peak values so that a calculation circuit 5 figures out the rotational speed from the pulse signal.

88. 发明专利

JPH10153608A ROTATING-SPEED DETECTOR AND ROTATING-DIRECTION DETECTOR 失效
公开(公告)号：JPH10153608A
公开(公告)日：1998-06-09
申请号：JP30955596
申请日：1996-11-20
申请人： TOYOTA MOTOR CORP
发明人： TERADA YASUHARU
IPC分类号： G01P3/488 , G01P13/04
摘要： PROBLEM TO BE SOLVED: To realize high resolution without requesting high processing accuracy with regard to a rotating speed detector, which detects the rotating speed of a rotary body based on the change in magnetic-flux density accompanied by the rotation of the rotary body. SOLUTION: A plurality of a first comb-tooth part 42 and a second comb- tooth part 44 are formed at a pitch angle α deg. in the circumferential direction of magnets 34 and 36. The magnets 34 and 36 are arranged so that the phase of the first tooth part 42 and the phase of the second tooth part 44 are different. A rotor 32, wherein a plurality of comb tooth parts 46 facing the first tooth part 42 and the second tooth part 44 are provided at every pitch angle αdeg., is rotatably arranged with respect to the teeth parts 42 and 44. An electromagnetic coil 38 is arranged so that the winding part is located between the magnet 34 and the magnet 36. The magnet 34 and the magnet 36 are linked with a yoke 33, and a magnetic circuit, which is intersected with the electromagnetic coil 38, is formed.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式