WO2005010908A1 - 磁性体検出装置及び移動体検出システム - Google Patents
磁性体検出装置及び移動体検出システム Download PDFInfo
- Publication number
- WO2005010908A1 WO2005010908A1 PCT/JP2004/003756 JP2004003756W WO2005010908A1 WO 2005010908 A1 WO2005010908 A1 WO 2005010908A1 JP 2004003756 W JP2004003756 W JP 2004003756W WO 2005010908 A1 WO2005010908 A1 WO 2005010908A1
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- WIPO (PCT)
- Prior art keywords
- magnet
- detection device
- magnetic body
- body detection
- magnetic
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
Definitions
- the present invention particularly relates to a magnetic body detection device and a mobile body detection system applicable to automobiles, elevators, nursing care equipment, home security systems, mobile phones, disconnection detection systems, industrial mouth pots, and the like.
- a magnetically responsive switch is described in JP-A-2003-151390.
- a movable member and a coil panel are provided in a switch case, and the coil panel supports the movable member, and an upper end portion of the movable member protrudes from an opening in an upper surface portion of the switch case.
- Hall IC is located in the switch case. When the upper end is pressed, the magnet fixed to the movable member moves downward, and the output signal of Hall IC changes from off to on.
- the improvement is useful when portability is required, such as a mobile phone, or when limited space is effectively used, such as a nursing care device such as a bathing assist device.
- an object of the present invention is to reduce the size, weight, and thickness of a magnetic body detection device including a magnetically sensitive switch, a magnetic switch, and a moving body detection system. Disclosure of the invention
- a magnetic body detection device of the present invention includes: a magnet that can be displaced in a linear direction; and a detection unit that detects a displacement of the magnet.
- the detection unit detects a displacement of the magnet. By doing so, it is detected that the magnetic body outside the magnetic body detection device main body is located at a predetermined distance from the magnetic body detection device main body.
- a magnetic switch of the present invention includes the above-described magnetic body detection device, and an output unit that outputs a detection signal when the displacement of the magnet is detected by the detection unit.
- the moving object detection system includes: A mobile body provided with a sex body.
- FIG. 1 is a plan view and a cross-sectional view of a magnetic body detection device according to Embodiment 1 of the present invention.
- FIG. 2 is an enlarged view of the magnet and the hole shown in FIG.
- FIG. 3 is a cross-sectional view of a magnetic body detection device according to Embodiment 2 of the present invention.
- FIG. 4 is a cross-sectional view of a magnetic body detection device according to Embodiment 3 of the present invention.
- FIG. 5 is an explanatory diagram of a magnetic body detection device according to Embodiment 4 of the present invention.
- FIG. 6 is an explanatory diagram of a magnetic body detection device according to Embodiment 5 of the present invention.
- FIG. 7 is a diagram showing a modification of FIG.
- FIG. 8 is an explanatory diagram of a magnetic body detection device according to Embodiment 6 of the present invention.
- FIG. 9 is a diagram showing a modification of FIG.
- FIG. 10 is a schematic configuration diagram of a moving object detection system according to Embodiment 7 of the present invention.
- FIG. 11 is a schematic configuration diagram of a moving object detection system according to Embodiment 8 of the present invention.
- FIG. 1A is a plan view of a magnetic body detection device 1 according to Embodiment 1 of the present invention.
- FIG. 1B is a cross-sectional view taken along line AA ′ of FIG. 1A.
- FIG. 1B also shows an iron piece 28 (magnetic material) located outside the main body of the magnetic body detection device 1.
- an iron piece 28 magneto-magnetic material located outside the main body of the magnetic body detection device 1.
- a magnetic piece such as a nickel piece or a cobalt piece is used. Anything that reacts can be detected.
- a magnet 10, a Hall IC 14, a mounting member 22, and the like are housed in a case 10.
- Case 10 is made of a non-magnetic material such as metal or plastic.
- the mounting member 22 is sealed so as to cover the opening of the case 10 so that outside air, water, oil, and the like do not enter the case 10.
- the magnet 12 can be displaced toward the iron plate 28 in FIG. 1B, that is, upward in FIG. 1B.
- the magnet 12 is displaced toward the iron piece 28 by the magnetic force.
- the iron piece 28 is relatively far from the magnetic body detection device 1 by the “J-shaped” leaf spring 30 that is an elastic body, as shown in FIG. B so that it is located below ⁇ '
- the leaf spring 30 when the leaf spring 30 is relatively far from the magnetic body detection device 1, it plays a role of fixing the magnet 12 so as not to be displaced, and a role of preventing the magnet 12 from being displaced in the lateral direction. ing.
- the leaf spring 30 moves the magnet 12 to the position before the displacement when the leaf spring 30 comes to be relatively far from the magnetic material detection device 1 after being relatively close to the magnetic material detection device 1. Has a role to send back.
- the magnet 12 is limited in its displaceable position below FIG. 1B by the lower stopper 32.
- the shape of the magnet 12 may be a shape such as a cube, a rectangular parallelepiped, or a column, in which the facing surface of the hole IC 14 is parallel to the outer wall of the hole IC.
- the magnet 12 is installed so that, for example, the south pole is located upward in FIG. 1B and the south pole is located downward in FIG. 1B.
- the hall IC 14 includes detection means for detecting the displacement of the magnet 12 and output means for outputting a detection signal when the displacement of the magnet 12 is detected.
- the hole IC 14 is attached to the attachment member 22 so as to be located near the magnet 12 in a direction orthogonal to the moving direction of the magnet 12.
- An input / output pin 24 for inputting and outputting a signal to and from an external signal processing means (not shown) is attached to the hall IC 14.
- a required through hole is formed in the mounting member 22 on the opening side of the case 10.
- An external connection cable 20 for inputting and outputting signals to and from the hall IC 14 is passed through the through hole.
- the external connection cable 20 and the input / output pins 24 are connected via a flexible cable (not shown) in the space 16.
- a magnet 12 is connected to the mounting member 22 via a leaf spring 30.
- One end of the leaf spring 30 is connected to, for example, the upper surface of the magnet 12, and the center portion of the leaf spring 30 passes through the space 26 through the side surface and the lower surface of the magnet 12 opposite to the Hall IC 14, The other end is connected to the mounting member 22 in the vicinity of the space 16 by fixing screws 18a and 18b.
- the magnet 12 contacts the lower stopper 32 when the iron piece 28 is relatively far from the magnetic body detection device 1. This is because if the iron piece 28 is relatively far from the magnetic substance detection device 1, the iron piece 28 only takes on weak magnetism in cooperation with the magnet 12, and the attractive force between the iron piece 28 and the magnet 12 Is weak. On the other hand, when the iron piece 28 is relatively close to the magnetic body detection device 1, the magnet 12 is displaced upward in FIG. 1B. This is because the iron piece 28 has strong magnetism in cooperation with the magnet 12, and the iron piece 28 and the magnet 12 have strong attraction to each other.
- FIG. 2 is an enlarged view of the magnet 12 and the Hall IC 14 shown in FIG. 1B.
- Figure 2A shows the state before the magnet 12 is displaced
- FIG. 2B shows the state after the magnet 12 is displaced.
- the magnet 12 can be displaced in the direction of the S-N pole, and the boundary between the two poles is set so as to straddle the operating point 14 a of the Hall IC 14 before and after the displacement of the magnet 12.
- the magnet 12 Around the magnet 12, there is a magnetic field line 12b that connects the S pole and the N pole in a curved manner.
- magnetic force lines 12c to 12e passing through a portion having the same magnetic force.
- Each of the magnetic flux lines 12c to 12e intersects directly with each magnetic flux line 12b.
- the isomagnetic lines 12b are, for example, 0 Gauss, and the isomagnetic lines 12c, 12e are each, for example, 25 Gauss. Further, as the distance from the boundary between the S and N poles of the magnet 12 increases, the strength of the magnetic force of the isomagnetic line increases.
- the equipotential surface 12 c of, for example, 25 Gauss on the N pole side of the magnet 12 is moved to the operating point 14 of the Hall IC 14. It is located below a. At this time, the Hall IC 14 is in the off state, and no detection signal is output from the Hall IC 14.
- the detection signal is output from the Hall IC 14 in the state shown in FIG. 2A, and the detection signal is output from the Hall IC 14 in the state shown in FIG. 2B. It will not be.
- FIG. 3 is a cross-sectional view of the magnetic body detection device 1 according to Embodiment 2 of the present invention.
- a nickel plating 36 and a support plate 34 as return means are provided in place of the plate spring 30.
- the nickel plating 36 is provided below the magnet 12.
- the nickel plating 36 is magnetized in cooperation with the magnets 12, so that the magnets 12 are fixed to the lower side in FIG.
- another iron piece smaller than the iron piece 28 may be provided.
- the support plate 34 is attached to, for example, the upper surface of the magnet 12.
- stainless steel such as SUS 30 or a polyimide plate can be used.
- the magnetic body detection device 1 of the present embodiment includes a nickel plating 36 and a support plate 3. 4 is less likely to deteriorate than the leaf spring 30, and thus has the advantage that the life is longer than that of the magnetic body detection device 1 of the first embodiment.
- FIG. 4 is a cross-sectional view of the magnetic body detection device 1 according to Embodiment 3 of the present invention.
- a spring 38 as a return means and a guide portion 35 are provided.
- a pipe-shaped magnet 15 is provided instead of the magnet 12 having a rectangular parallelepiped shape.
- the spring 38 has one end attached to the upper inner wall of the magnetic body detection device 1 and the other end attached to a pipe of the magnet 15.
- the guide portion 35 is formed integrally with a support column 33 having a diameter slightly shorter than the inner diameter of the magnet 15.
- the magnet 15 is fitted into the column 33.
- the length of the column 33 is larger than the displacement of the magnet 15.
- the support plate may be attached to the magnet 15 instead of the guide portion 35. Since the magnetic body detection device 1 of the present embodiment does not need to be provided with the leaf spring 30 and the nickel plating 36, etc., the magnetic body detection device 1 can be made thinner than the magnetic body detection device 1 of the first and second embodiments. Can be.
- FIG. 5A is a plan view of a magnetic body detection device 1 according to Embodiment 4 of the present invention.
- FIG. 5B is a cross-sectional view of FIG. 5A.
- FIG. 5C is a side view of FIG. 5A.
- FIG. 5D is a bottom view of FIG. 5A.
- FIG. 5E is a plan view of the mounting tool 48 connected to the magnetic substance detection device 1.
- FIG. 5F is a side view of FIG. 5E.
- a column 44 and a spring 38 are provided instead of the plate spring 30.
- the support 44 extends from the bottom surface to the upper surface of the case 10 in the space 16 and is integrally formed with the case 10.
- a step for receiving one end of the spring 38 is formed on the side surface of the column 44.
- a spring 38 having an inner diameter slightly larger than the outer diameter of the support 44 is located.
- a plastic magnet receiver 46 having an inner diameter slightly larger than the outer diameter of the spring 38 is located.
- a magnet 15 having an inner diameter slightly larger than the outer diameter of the magnet receiver 46 is mounted around the magnet receiver 46 so that, for example, the upper pole in the drawing is the S pole and the lower pole in the drawing is the N pole.
- the magnet 15 is surrounded by one short side wall of the case 10, a part of both long side walls, and a first surface of a partition wall 29 defining a space 16. ing.
- the magnet receiver 46 has a bottom protruding outward so as to receive one end of the magnet 15, and a through hole for passing the column 44 is formed at the top. Size of through hole
- the inner diameter of the support 44 is slightly larger than the outer diameter of the support 44 so that the magnet receiver 46 can slide up and down.
- the upper part of the case 10 is fitted with an upper lid 47 made of the same material as the case having an opening with an inner diameter slightly larger than the outer diameter of the strut 44, and the strut receiver 49 is inserted into the opening of the upper lid 47. Is fitted. After that, the upper cover 47 and the column receiver 49 are adhered to the case 10 side using an adhesive or the like, thereby shutting off the space 16 and the outside air. Further, the hall IC 14 is attached to the second surface of the partition wall 29, and its surroundings are filled with a resin 27 to block the outside air and the like.
- a draw-out port for drawing out the external connection cable 20 is formed on the short side surface of the case 10 on the side of the hole IC 14.
- grooves 40 and 42 are formed on the side surface of the case 10 in the longitudinal direction.
- a mounting tool 48 as shown in FIGS. 5E and 5F is connected to the grooves 40 and 42 so that the case 10 can be mounted on required members.
- the mounting tool 48 includes a mounting portion 58 on which the case 10 is mounted, a bottom portion 60 extending to one side in the longitudinal direction of the mounting portion 58, and a mounting portion 58.
- Case gripper 54 extending vertically from near the boundary with bottom surface 60
- case gripper 56 extending vertically from the other side in the longitudinal direction of mounting portion 58
- central portion of case gripper 56 Including a stopper 5 formed in 5.
- the attachment 48 is made of, for example, stainless steel.
- the mounting portion 58 has a central portion cut out for weight reduction. Screw holes 50 and 52 are formed in the bottom surface 60.
- the case gripping portion 55 has a notch at the center to form a stopper 54, so that the case gripping portion 55 is accommodated in the groove 42.
- the case gripping portion 56 has its tip bent inward so as to be accommodated in the groove 40.
- the upper surface of the magnet receiver 46 is in contact with the bottom surface of the upper lid 47.
- the magnet receiver 46 is moved from the upper lid 47.
- the spring 38 is displaced downward in Fig. 5B while contracting.
- the Hall IC 14 changes from off to on.
- magnétique body detection device 1 of the present embodiment compared to the magnetic body detection device 1 of the first embodiment, further miniaturization can be realized by eliminating the space 26.
- FIG. 6A is a cross-sectional view of a magnetic body detection device 1 according to Embodiment 5 of the present invention.
- Fig 6 B is a first side view of FIG. 6A.
- FIG. 6C is a second side view of FIG. 6A.
- 7A to 7C are diagrams showing modified examples of FIGS. 6A to 6C.
- a step is formed on the inner wall of case 10.
- the disc-shaped magnet holding portion 70 made of plastic is pressed and pushed to this step.
- the magnet holding portion 70 has a peripheral edge rising toward the opening side of the case 10 and also accommodates an end of a stainless steel holding member 23 for holding the Hall IC 14.
- a plate-like notch with a plate is formed near the center.
- a screw hole through which the screw 64 passes is formed in the magnet holding portion 70 so as to be eccentric from the center.
- the gripping member 23 defines a main body 23 d that is long in the axial direction of the case 10, a mounting part 23 a on which the Hall IC 14 is mounted, and a mounting position of the Hall IC 14.
- the holding portion 23 b and 23 c which are bent at a required angle with respect to the main body 23 are included.
- a screw support is formed at the bottom of the magnet holding portion 70, and a plastic mushroom-shaped column 44 having a large head and a cylindrical leg is connected by a screw 64. .
- a spring 38 having an inner diameter slightly larger than the outer diameter of the leg is located.
- a plastic cylindrical magnet receiver 46 having an inner diameter slightly larger than the outer diameter of the spring 38 and slightly larger than the outer diameter of the head of the column 44 is located.
- the magnet receiver 46 has a magnet 15 pressed at one end and an outer wall at the other end.
- a claw portion having a tapered shape and an inner wall extending inward is formed. The inner diameter of the claw is
- the outer side wall of the claw portion is in contact with the magnet holding portion 70 when the iron piece 28 is relatively far from the magnetic body detection device 1.
- the inner side wall of the claw contacts one end of the spring 38, and the other end of the spring 38 contacts the bottom of the leg of the column 44.
- the magnet receiver 46 and the magnet holding part 70 separate. While the spring 38 contracts, it is displaced to the left in FIG. 6A, and the Hall IC 14 turns on as described above.
- a rubber packing 68 that covers the external connection cable 20 and a packing receiver 62 that connects the rubber packing 68 to the opening of the case 10 are attached to the opening side of the case 10.
- the Hall ICs 14 are protected from dust and dirt.
- the flexible cable connected to the input / output pin 24 passes through the side of the second auxiliary portion 23f.
- the dead space can be reduced, for example, the eccentric distance of the magnet 15 and the like is shorter than that of the magnetic body detection device 1 shown in FIG. 6, so that the diameter of the case 10 can be made smaller. .
- FIG. 8A is a plan view of a magnetic body detection device 1 according to Embodiment 6 of the present invention.
- FIG. 8B is a side view of FIG. 8A.
- FIG. 8C is a cross-sectional view of FIG. 8A.
- FIG. 8D is a side view of FIG. 8C.
- 8E to 8G are cross-sectional views taken along line B-B ', C-C', and D-D 'of FIG. 8C.
- FIGS. 9A and 9B are diagrams showing modified examples of FIGS. 8A and 8B.
- screw holes 80 and 82 are provided for attaching the case 10 to required members with screws.
- the magnet 72 is a pipe body.
- the upper side of FIG. 8C is an N pole, and the lower side is an S pole.
- the magnets 12 and 72 are attached to one end of a stainless steel arm 74 and a first pipe 76, respectively.
- the shape of the arm 74 is a square shape having a “U-shaped” cross section, and the shape of the first pipe 76 is a cylindrical shape having an outer diameter that fits in the arm 74.
- the other ends of the arm 74 and the first pipe 76 are connected to each other in such a manner that the first pipe 76 is housed in the arm 74.
- a cross-shaped polyimide support plate 78 whose center is hollowed out is positioned on the upper part of the connecting portion, and then connected by bonding or the like.
- the support plate 78 is on the side parallel to the arm
- the two alignment marks are formed such that the width is the same as that of the arm 74, and the length is the same as the length of the connecting portion.
- the support plate 78 should have a side perpendicular to the arm 74 with the same width as the longitudinal direction of the screw receivers 92, 94. It has the same length as, and has two screw holes.
- the support plate 78 is attached to the case 10 by screws 84 and 86 through these screw holes.
- the arm 74 and the first pipe 76 are set to be parallel to the case 10 and the second pipe 88. Therefore, the arm 74 and the first pipe 76 are suspended by the support plate 78.
- the iron piece 28 approaches the magnet 72 relatively, the magnet 72 and the iron piece 28 attract each other.
- the arm 74 and the first pipe 76 are tilted with respect to the case 10 and the second pipe 88 with the support plate 78 as a fulcrum, and the Hall IC 14 is turned on.
- An opening for attaching a second stainless steel pipe 88 enclosing the first pipe 76 is formed on the first lateral side of the case 10 in the lateral direction.
- An outlet for extracting the external connection cable 20 is formed.
- the second pipe 88 has an inner diameter larger than the outer diameter of the magnet 72.
- a connecting portion 96 is pressed between the inside of the magnet 72 and the inside of the first pipe 76, and is connected through the connecting portion 96.
- a stainless steel cap 90 is fitted to the end of the second pipe 88.
- an LED 98 that notifies the on / off state of the hall IC 14.
- the power source and anode of the LED 98 are electrically connected to, for example, the positive power supply terminal and the output terminal of the Hall IC 14, respectively.
- the output signal from the output terminal is off, that is, at the high level, there is no potential difference between the positive power supply terminal and the output terminal, so that no current flows through the LED 98.
- the output signal from the output terminal is on, that is, when the output signal is at a low level, a potential difference occurs between the positive power supply terminal and the output terminal, and a current flows through the LED 98.
- the LED 98 may be provided in the external connection cable 20 to reduce the size and weight of the case 10. Further, the LED 98 may be provided in the magnetic substance detection device 1 shown in FIG. 1 and the like.
- FIG. 10 is a schematic configuration diagram of a moving object detection system according to Embodiment 7 of the present invention.
- the present embodiment will exemplify a case where the magnetic body detection device 1 described in Embodiments 1 to 6 is used for home security.
- the detection signal is output.
- Figure 10 shows a building 100 such as a house or office, an iron piece 28 attached to the door 110 of the building 100, and an iron piece 28 facing the door 110 when the door 110 is closed.
- Magnetic device detecting device 1 attached to a position, a transmitting device 200 that transmits a detection signal from the magnetic material detecting device 1, and a building 10 that receives the detecting signal transmitted from the transmitting device 200.
- a security center 300 for urging security guards and the like is shown.
- the mounting positions of the iron piece 28 and the magnetic substance detection device 1 may be reversed.
- the distance between the iron piece 28 and the magnetic detector 1 Become relatively close.
- the distance between the iron piece 28 and the magnetic substance detection device 1 gradually becomes relatively longer.
- the magnetism of the iron piece 28 weakens.
- the magnet incorporated in the magnetic substance detection device 1 is displaced. Therefore, it is possible to detect that the door 110 is opened based on the principle described in the first embodiment and the like.
- the magnetic material detection device 1 detects the transmission device 200 through the external connection cable 20. A signal is output.
- the transmission device 200 receives the detection signal output from the magnetic material detection device 1, adds the unique ID information assigned to the building 100 to the transmission source to the detection signal, and Is transmitted to the security center 300.
- the security sensor 300 receives the detection signal transmitted from the transmitting device 200 and, based on the ID information attached to the detected signal, the transmitting device 200 of the transmission source of the detection signal transmits the detection signal. Identify the building 100 in which it is installed, and rush security guards to that building 100.
- FIG. 11 is a schematic configuration diagram of a moving object detection system according to Embodiment 8 of the present invention.
- a case where the magnetic body detection device 1 described in Embodiments 1 to 6 is used for a mobile phone 500 will be described as an example.
- the magnetic body detection device 1 and the iron piece 28 are relatively close, no detection signal is output, and when the magnetic body detection device 1 and the iron piece 28 are relatively far, The detection signal is output.
- FIG. 11 shows a foldable mobile phone 500 in which a first housing 5 10 and a second housing 5 20 are hingedly connected.
- the magnetic body detection device 1 is attached to the end of the first housing 5
- the iron piece 28 is attached to the end of the second housing 5 20.
- the attachment positions of the magnetic substance detection device 1 and the iron piece 28 may be changed mutually.
- the magnetic body detection device 1 and the iron piece 28 are located relatively close to each other.
- the magnetic body detection device 1 and the iron piece 28 are located relatively far apart. For this reason, it is possible to detect mutual opening and closing of the first housing 510 and the second housing 5220 based on the principle described in the first embodiment and the like.
- the detection of the open / close state enables switching of, for example, ON / OFF of the mana mode, ON / OFF of the answering machine setting, pressing of the call key, and the like.
- the manner such as manner mode is switched off.
- the first case 5110 and the second case 5220 are mutually opened, a call can be made, so that the user of the mobile phone can use the first case.
- the operability of the mobile phone can be achieved by simply opening and closing the housing 510 and the second housing 520 mutually, without having to press the mana mode setting key or the talk key. Is improved.
- a door switch for detecting opening and closing of a door of an automobile, an elevator system for controlling a stop position of an elevator, and a robot arm for industrial machinery and nursing equipment. It can also be applied to arm position control that performs position control such as for example, and a disconnection detection system that detects whether or not a piano wire is broken when it is extended.
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- Geophysics And Detection Of Objects (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04721997A EP1650779A4 (en) | 2003-07-25 | 2004-03-19 | DEVICE FOR DETECTING MAGNETIC MATERIAL AND SYSTEM FOR DETECTING BODY IN MOTION |
US10/566,018 US7791336B2 (en) | 2003-07-25 | 2004-03-19 | Displaceable magnetic detection device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003279511A JP2005044702A (ja) | 2003-07-25 | 2003-07-25 | 磁性体検出装置、磁気スイッチおよび移動体検出システム |
JP2003-279511 | 2003-07-25 |
Publications (1)
Publication Number | Publication Date |
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WO2005010908A1 true WO2005010908A1 (ja) | 2005-02-03 |
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ID=34100819
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PCT/JP2004/003756 WO2005010908A1 (ja) | 2003-07-25 | 2004-03-19 | 磁性体検出装置及び移動体検出システム |
Country Status (5)
Country | Link |
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US (1) | US7791336B2 (ja) |
EP (1) | EP1650779A4 (ja) |
JP (1) | JP2005044702A (ja) |
CN (1) | CN100442417C (ja) |
WO (1) | WO2005010908A1 (ja) |
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DE102010038103A1 (de) * | 2009-10-16 | 2011-04-21 | U-Shin Ltd. | Kontaktloser Schalter |
US8365874B2 (en) * | 2010-06-21 | 2013-02-05 | Automotive Research & Testing Center | Electric parking brake actuator |
KR101427543B1 (ko) * | 2010-07-30 | 2014-08-07 | 미쓰비시덴키 가부시키가이샤 | 자성체 검출 장치 |
GB201219097D0 (en) * | 2012-10-24 | 2012-12-05 | Metrasens Ltd | Apparatus for detecting ferromagnetic objects at a protected doorway assembly |
JP5897146B2 (ja) * | 2012-11-15 | 2016-03-30 | 三菱電機株式会社 | 磁気センサ装置 |
WO2016078665A1 (en) * | 2014-11-21 | 2016-05-26 | Vestas Wind Systems A/S | A contaminant sensor for detecting magnetizable contaminants in lubricant flow |
JP6373790B2 (ja) * | 2015-04-06 | 2018-08-15 | アサ電子工業株式会社 | 非接触スイッチ |
CN107170300B (zh) * | 2017-07-17 | 2024-02-13 | 深圳中电数码显示有限公司 | 一种教学设备 |
CN111928877A (zh) * | 2020-05-26 | 2020-11-13 | 凌云工业股份有限公司汽车零部件研发分公司 | 一种非铁质工件的铆钉检测装置 |
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2004
- 2004-03-19 US US10/566,018 patent/US7791336B2/en active Active
- 2004-03-19 CN CNB2004800213981A patent/CN100442417C/zh not_active Expired - Fee Related
- 2004-03-19 EP EP04721997A patent/EP1650779A4/en not_active Withdrawn
- 2004-03-19 WO PCT/JP2004/003756 patent/WO2005010908A1/ja active Application Filing
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Also Published As
Publication number | Publication date |
---|---|
US20070188161A1 (en) | 2007-08-16 |
EP1650779A4 (en) | 2006-11-15 |
CN100442417C (zh) | 2008-12-10 |
CN1830046A (zh) | 2006-09-06 |
US7791336B2 (en) | 2010-09-07 |
EP1650779A1 (en) | 2006-04-26 |
JP2005044702A (ja) | 2005-02-17 |
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