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41. 发明专利

JP2003214897A DISPLACEMENT AMOUNT SENSOR 审中-公开
公开(公告)号：JP2003214897A
公开(公告)日：2003-07-30
申请号：JP2001394787
申请日：2001-12-26
申请人： NIPPON SOKEN , DENSO CORP
发明人： MIZUTANI AKITOSHI , TAKEDA KENJI , TOKUNAGA MASAO , NAKAMURA TSUTOMU , TAKEYAMA HIROSHI , UCHIDA KIMIO , YASUDA KEIICHI , HARIO TETSUO
IPC分类号： G01B7/00 , G01D5/14 , G01D11/24
摘要： PROBLEM TO BE SOLVED: To provide a displacement amount sensor for highly accurately detecting the amount of displacement in directions of the rectilinear movements of a mobile body even if the rectilinearly moving mobile body is rotated. SOLUTION: A permanent magnet 30 comprises a through hole 100 in the directions of arrows A and B of rectilinear movements. A Hall IC 40 is capable of rectilinearly moving through the through hole 100 relatively to the permanent magnet 30. The inner circumferential surface 31 of the permanent magnet 30 which forms the through hole 100 has approximately the same diameter in the directions of the rectilinear movements. The diameter of the outer circumferential surface 32 of the permanent magnet 30 is rectilinearly reduced toward the direction of the arrow B, one of the directions of the rectilinear movements. The thickness of the permanent magnet 30 in directions which intersect at right angles with the axis 110 of the through hole 100 along the directions of the rectilinear movements of the permanent magnet 30 is rectilinearly reduced in the directions of the arrow B. The permanent magnet 30 is polarized in one direction of the rectilinear movements toward its thin side from its thick side. The Hall IC 40 is arranged in such a way that a magnetic flux flowing through the through hole 100 in the direction of the arrow B approximately vertically passes through a detecting surface of the Hall IC 40. COPYRIGHT: (C)2003,JPO

42. 发明专利

JP2003139029A ENGINE STARTING SYSTEM 审中-公开
公开(公告)号：JP2003139029A
公开(公告)日：2003-05-14
申请号：JP2001332103
申请日：2001-10-30
申请人： DENSO CORP , NIPPON SOKEN
发明人： OSADA MASAHIKO , SAITO MIKIO , NISHIOKA YUJI , NAKAMURA TSUTOMU
IPC分类号： F02D45/00 , F02N11/08 , F02N15/06
摘要： PROBLEM TO BE SOLVED: To reduce colliding sounds and prevent damages to gears by relaxing impact caused during transmitting torque from a pinion gear to a ring gear. SOLUTION: A certain time after starting the energization of a starting motor 1, for example, after detecting an engine control signal (a short time before the tooth surface of the pinion gear collides with the tooth surface of the ring gear), the voltage control of the starting motor 1 is started. Specifically, voltage applied to the starting motor 1 is dropped so that a difference in rotating speed between the pinion gear and the ring gear is smaller. Thus, the rotating speed of the starter is lower to make the difference in rotating speed between the pinion gear and the ring gear smaller, and so the tooth surface of the pinion gear has soft abutment on the tooth surface of the ring gear. As a result, the impact is relaxed during the abutment of the gears, reducing the colliding sounds of both gears and preventing damages to the pinion gear and the ring gear.

43. 发明专利

JP2001330559A FOREIGN MATTER DETECTING DEVICE AND AUTOMATIC WIPER CONTROL DEVICE USING IT 失效
公开(公告)号：JP2001330559A
公开(公告)日：2001-11-30
申请号：JP2000147941
申请日：2000-05-19
申请人： NIPPON SOKEN , DENSO CORP
发明人： TOKUNAGA MASAO , NAKAMURA TSUTOMU , ISHINO HIROTSUGU
IPC分类号： G01N21/94 , B60S1/08 , B60S1/46 , G01N21/27
摘要： PROBLEM TO BE SOLVED: To provide a foreign matter detecting device which can detect foreign matter 8 and an automatic wiper control device 1 using it, and automatically jet washing liquid by controlling the automatic wiper when the foreign materials (soil particles in muddy water) adhere. SOLUTION: When an incident light 9 from a light emitting means 2 comes incident on a back surface 11b of a surface 11a on which the foreign matter adhere at an angle the incident light 9 is subjected to total internal reflection, an evanescent wave electromagnetic field is generated. Light quantity of a reflection light 10, which reflects from the back surface 11b of the surface 11a, decreases, as the evanescent wave electromagnetic field is disturbed according to adhering degree of the foreign matter 8 which adhere on the surface 11a. In this foreign matter detecting device, the foreign matter 8 is detected by receiving decreased light quantity of the reflection light 10 by a light receiving means 3. When the foreign matter detecting device is applied to the automatic wiper control device for a vehicle or the like, excellent visibility is automatically available at all times by detecting dirt of the foreign matter on a surface of a window and by automatically wiping in cooperation with a washer.

44. 发明专利

JPH1183740A RAINDROP DETECTOR 失效
公开(公告)号：JPH1183740A
公开(公告)日：1999-03-26
申请号：JP23998797
申请日：1997-09-04
申请人： DENSO CORP , NIPPON SOKEN
发明人： YASUDA KEIICHI , TERAKURA OSAMU , TOKUNAGA MASAO , NAKAMURA TSUTOMU
IPC分类号： G01N21/15 , B60S1/08 , G01N21/47 , G01W1/14
摘要： PROBLEM TO BE SOLVED: To rapidly remove dew formation of an optical prism, by providing a heater for heating the prism by thermal conduction via a reflection conduction plate. SOLUTION: A heater 20 is provided corresponding to a site brought into contact with an optical prism 12 at the other surface of a reflection conduction plate 22 at an opposite side of a reflecting surface 19a to heat the plate 22, thereby heating the prism 22 by thermal conduction of the plate 22. The plate 22 is formed in a shape bent along a recess surface 37a of a recess 37, and brought at both ends 46 into contact with both ends of a plate-like part 19 of the prism 12. Therefore, a thermal conduction area of the plate 22 can be increased so that heat of the heater 20 can be further easily transferred to the overall prism 12. As a result, the overall prism 12 can be further rapidly heated, thereby improving a raindrop detecting accuracy. Energization of the heater 20 is controlled by a CPU and a heater circuit 21.

45. 发明专利

JPH10315920A AUTOMATIC CONTROL DEVICE FOR WIPE 失效
公开(公告)号：JPH10315920A
公开(公告)日：1998-12-02
申请号：JP12999897
申请日：1997-05-20
申请人： NIPPON SOKEN , DENSO CORP
发明人： NAKAMURA TSUTOMU , TOKUNAGA MASAO , TERAKURA OSAMU , YASUDA KEIICHI
IPC分类号： G01N21/47 , B60S1/08
摘要： PROBLEM TO BE SOLVED: To reduce the unnecessary operation of a wiper at the time of starting by taking a reference value stored in a storing means as a this time reference value to determine the existence/absence of a raindrop by a raindrop determining means when the elapsed time until input of power supply to a raindrop detecting means is restarted is shorter than a designated time. SOLUTION: When the amount of time T elapsed from the cut-off of a power supply of a raindrop detecting device to reclosing is shorter than a designated time T1, a reference value K before the control stop by the preceding wiper switch is called (S40). When the elapsed time T is longer than the designated time T1, a window glass is wiped out by a wiper blade (S50). After that, a signal value D detected in the condition where no raindrop adheres to the window glass is set as a reference value K according to the elapsed time T to detect the signal value D (S80). When the amount F (S90) of raindrops calculated according to the difference between the reference value K and the detected signal value D is smaller than a threshold J, a stop signal is generated to stop a wiper motor (S130).

46. 发明专利

JP2001289609A ANGLE-OF-ROTATION DETECTOR 失效
公开(公告)号：JP2001289609A
公开(公告)日：2001-10-19
申请号：JP2000102385
申请日：2000-04-04
申请人： DENSO CORP , NIPPON SOKEN
发明人： NAKAMURA TSUTOMU , ISHIHARA TOSHIHISA , TAKEDA KENJI , KONO YOSHIYUKI
IPC分类号： G01B7/30 , G01B7/00 , G01D5/14 , G01D5/18
摘要： PROBLEM TO BE SOLVED: To provide an angle-of-rotation detector for which the output characteristic of a magnetism detecting element with respect to the angle of rotation of an object to be detected can be set within the range of >=180 deg. and which can be improved in angle-of-rotation detecting characteristic. SOLUTION: This angle-of-rotation detector is provided with a rotor constituted of two magnets 1 and a main yoke 2 and a stator constituted of one set of auxiliary yokes 3 and the magnetism detecting element 4 and the rotor is fixed to the rotating shaft of an object to be detected. The main yoke 2 constitutes a magnetic circuit by closing the space between the magnets 1 in a ring-like state. The auxiliary yokes 3 are arranged with a gap 5 in between and the magnetism detecting element 4 is incorporated in the central part of the gap 5. The stator is positioned in the rotor so that the air gap G formed between the stator and rotor may gradually change in the peripheraly. To be concrete, the direction of the gap of the stator is made coincide with that of the center line A-A of the rotor and the center Os of the stator is shifted from the center Or of the rotor by a prescribed amount L.

47. 发明专利

JP2000329513A DRIVING CIRCUIT FOR PHYSICAL QUANTITY DETECTING ELEMENT AND ROTATION ANGLE SENSOR 失效
公开(公告)号：JP2000329513A
公开(公告)日：2000-11-30
申请号：JP13569999
申请日：1999-05-17
申请人： DENSO CORP , NIPPON SOKEN
发明人： NAKAMURA TSUTOMU , KIKUCHI TETSUO , TARUI ATSUSHI
IPC分类号： G01B7/30 , G01B7/00 , G01D5/14
摘要： PROBLEM TO BE SOLVED: To obtain a driving circuit of a simple constitution for a physical quantity detecting element capable of accurately compensating for variation due to temperature in the detecting sensitivity of the physical quantity detecting element in which its internal resistance value is increased with rise in temperature and detection sensitivity drops. SOLUTION: The drive circuit to supply a drive current I for the Hall element 16 of a throttle opening sensor is provided with an operational amplifier 2 with an inverting input terminal and output terminal each connected to the drive current terminals (a) and (b) of the device 16 and a non-inverting input terminal connected to the ground potential, a resistance R with one end connected to the inverting input terminal of the operational amplifier 2, an inverting amplifier 3 to invert and amplify the output voltage Vo of the operational amplifier 2, and an adder 4 to add a reference voltage Va (>0) and the output voltage Vb of the inverting amplifier 3 together and to impress it on the opposite-side end part of the resistance R to the side of the operational amplifier 2. In this circuit, when the internal resistance value Rd of the device 16 is increased with rise in temperature, the drive current I is increased to compensate for the sensitivity of the device.

48. 发明专利

JP2000085538A WIPER CONTROL DEVICE 失效
公开(公告)号：JP2000085538A
公开(公告)日：2000-03-28
申请号：JP25281298
申请日：1998-09-07
申请人： NIPPON SOKEN , DENSO CORP
发明人： NAKAMURA TSUTOMU , TOKUNAGA MASAO , WAKABAYASHI SHINJI , MAENO SATORU
IPC分类号： B60S1/08 , G01N21/17
摘要： PROBLEM TO BE SOLVED: To provide a wiper control device which can operate wipers to wipe smoothly. SOLUTION: The variation amount of the rain drops by the rain drop amount detected by a raindrop sensor 10 when an assistant seat side wiper reaches to a rain drop sensor position 1b, and the rain drop amount detected by the rain drop sensor 10 when the assistant seat side wiper reaches to the rain drop sensor position 1b again thereafter is calculated. The variation amount of the rain drops adding the rain drop amount detected by the rain drop sensor 10 when the wiper reaches to a nonsensor position 1k of the wiping area to the above variation amount of the rain drops is calculated, According to the variation amounts of the rain drops, both wipers are controlled to change the wiping operation speeds.

49. 发明专利

JPH10311787A RAINDROP AMOUNT DETECTOR 失效
公开(公告)号：JPH10311787A
公开(公告)日：1998-11-24
申请号：JP12241597
申请日：1997-05-13
申请人： NIPPON SOKEN , DENSO CORP
发明人： TOKUNAGA MASAO , NAKAMURA TSUTOMU , WAKABAYASHI SHINJI , TERAKURA OSAMU
IPC分类号： G01N21/15 , B60S1/08 , G01N21/17 , G01N21/47 , G01W1/14
摘要： PROBLEM TO BE SOLVED: To provide a raindrop amount detector capable of stably detecting presence or absence of raindrops without being influenced by power supply noises generated in conductive drive of a heater. SOLUTION: If a drive signal is output in LED(light emitting diode emitting infrared rays), the LED emits lights for Tw0 time. During this Tw0 time, an amount of raindrops is detected. If the Tw0 time passes, a power to the LED is disconnected. Then, a drive signal is output to a heater and a power is turned on and heating of prism is started and this heating is continued for Tw1 time. Next, if a heating time of prism is continued for the Tw1, a power to the heater is shielded.

50. 发明专利

JP2004257369A ENGINE STARTER 审中-公开
公开(公告)号：JP2004257369A
公开(公告)日：2004-09-16
申请号：JP2003052182
申请日：2003-02-28
申请人： DENSO CORP , NIPPON SOKEN
发明人： SENDA TAKASHI , NAKAMURA TSUTOMU , OSADA MASAHIKO
IPC分类号： F02N15/00 , F02D17/00 , F02D29/02 , F02D45/00 , F02N11/00 , F02N11/08
摘要： PROBLEM TO BE SOLVED: To have a current suppressing means to suppress the starting current of a starter motor 1 integrated with the starter motor 1. SOLUTION: The starter motor 1 is provided with a first field coil 6 connected in series to an armature 5; and a shunt coil 7 connected in parallel to the armature 5. The first field coil 6 is caused to have a resistance component capable of suppressing a current, flowing in the armature 5 during starting of the starter motor 1, to a value lower than a given value. The current carrying circuit of the starter motor 1 is provided with a relay 2 in a short-circuit 8 to short-circuit the first field coil 6. The relay 2 maintains an OFF-state until an engine runs over a first top dead center, and is switched to an IN-state after it runs over the first top dead center. Thus, since the starting current of the starter motor 1 is carried to the armature 5 through the first field coil 6, it is suppressed by the resistance component of the first field coil 6. COPYRIGHT: (C)2004,JPO&NCIPI

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