WO2004019049A1 - 静電容量型加速度センサおよびその製造方法 - Google Patents
静電容量型加速度センサおよびその製造方法 Download PDFInfo
- Publication number
- WO2004019049A1 WO2004019049A1 PCT/JP2003/008507 JP0308507W WO2004019049A1 WO 2004019049 A1 WO2004019049 A1 WO 2004019049A1 JP 0308507 W JP0308507 W JP 0308507W WO 2004019049 A1 WO2004019049 A1 WO 2004019049A1
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- WO
- WIPO (PCT)
- Prior art keywords
- diaphragm
- weight
- electrode substrate
- fixed
- hole
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
- G01P15/125—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by capacitive pick-up
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/18—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration in two or more dimensions
Definitions
- the present invention relates to a capacitive acceleration sensor and a method for manufacturing the same.
- Acceleration sensors are widely used as physical quantity detection devices in various fields of the machinery industry, and are also used as input devices for digital devices. Acceleration sensors are classified into one-axis type, three-axis type, and the like according to the detection direction. Examples of the detection type include a piezoresistive sensor, a piezoelectric sensor, and a capacitance sensor.
- the capacitive acceleration sensor according to the present invention has a displacement electrode or a weight attached to one surface of a diaphragm which is made of metal and is a common electrode, and secures electrode spaces on both sides of the diaphragm. There is a configuration in which electrode substrates for capacitance detection are stacked via a spacer.
- the weight of the acceleration sensor greatly affects the detection sensitivity due to factors such as weight and moment, but also affects the height of the sensor. That is, if the shaft length of the weight is long, the height of the sensor increases. Increasing the shaft length is preferable in that it leads to an improvement in detection sensitivity with an increase in moment, but on the other hand, a problem arises when the sensor becomes too high to meet the demand for miniaturization.
- the height of the sensor is reduced while ensuring the detection sensitivity, and the size is effectively reduced.
- a capacitive acceleration sensor and a method of manufacturing the same.
- an electrode substrate for capacitance detection is laminated on both sides of the diaphragm with a spacer interposed therebetween, and formed on one surface of the diaphragm and on one electrode substrate facing the one surface.
- the capacitance type kaolin speed sensor in which the weight passed through the through hole is fixed, the weight is passed through the through hole of one of the electrode substrates and fixed to the diaphragm; It is provided on the outer surface side of the electrode substrate and has a head having a diameter larger than the through hole.
- a weight according to the present invention includes a shaft portion and a head portion, and the shaft portion is passed through a through hole of one of the electrode substrates and is fixed to the diaphragm, and the head portion has a larger diameter than the through hole. Therefore, it has a larger diameter than the shaft portion and is arranged on the outer surface side of one of the electrode substrates. Because the head is flat, the height is significantly reduced with the same weight compared to a simple column-shaped weight, thus ensuring detection sensitivity and increasing the height of the sensor itself. The size can be reduced because it can be suppressed.
- the weight of the present invention includes a form in which a portion of the head facing the diaphragm is formed in a tapered shape that is separated from the diaphragm from the inner peripheral portion on the shaft side toward the outer peripheral portion.
- a portion of the head facing the diaphragm is formed in a tapered shape that is separated from the diaphragm from the inner peripheral portion on the shaft side toward the outer peripheral portion.
- the shaft and the head are separated from each other, and both are fixed during the manufacturing process or at the final stage.
- the moment can be increased and the detection sensitivity can be improved.
- the materials of both are made different, and the material of the head is made different from the material of the shaft.
- the specific gravity heavy there is a method of making the specific gravity heavy.
- the shaft The head can be made heavier than the shaft by using grease or the head made of metal, or even of the same metal, by using stainless steel for the shaft and brass for the head.
- an electrode substrate for capacitance detection is laminated on both sides of the diaphragm with a spacer interposed therebetween, and one side of the diaphragm is opposed to the one side.
- a method of manufacturing a capacitance type acceleration sensor in which a weight passing through a through hole formed in one of the electrode substrates is fixed, wherein the weight is fixed to a diaphragm through an insertion hole.
- a shaft portion and a head portion that is disposed on the outer surface side of one of the electrode substrates and has a larger diameter than the through hole are provided.
- an acceleration sensor having the configuration of the present invention, that is, an acceleration sensor in which a weight is fixed to one surface of the diaphragm and electrode substrates are laminated on both sides of the diaphragm via spacers, a weight of the diaphragm is required.
- a conventional procedure has been adopted in which a spacer and an electrode substrate are laminated on both sides of the diaphragm. According to such a procedure, in order to stack the electrode substrate on the weight side, the weight is fixed to the diaphragm first, so that a through hole for passing the weight is formed in the electrode substrate. The weight is laminated through the through hole.
- the diameter of the through hole needs to be larger than that of the head portion. For this reason, the area of the detection electrode of the electrode substrate in which the through hole is formed is naturally reduced, and a problem arises that the detection sensitivity is reduced accordingly.
- the shaft is passed through the through hole of one of the electrode substrates, and this shaft is fixed to the diaphragm.
- the diameter of the hole can be limited to a size that allows the shaft portion to be inserted. For this reason, It is not necessary to enlarge the through hole through which the weight passes so that the head can pass through, and as a result, the area of the detection electrode of the electrode substrate can be secured, and thus the detection sensitivity can be secured.
- a shaft portion is passed through a through hole of one electrode substrate, and then a spacer, a diaphragm, a spacer, and the other electrode substrate are passed through the one electrode substrate.
- a method in which the layers are stacked in this order may be used.
- an electrode substrate is laminated on both sides of the diaphragm with spacers therebetween, and then the shaft of the weight is passed through the through hole of one of the electrode substrates, and the shaft is passed through the diaphragm.
- a working hole for fixing the weight is formed in a portion corresponding to the diaphragm on the other electrode substrate facing the surface on which the weight of the diaphragm is not fixed, and the working hole is used. It is preferable to fix the shaft of the weight to the diaphragm because the shaft can be easily fixed to the diaphragm.
- the means for fixing the shaft portion to the diaphragm includes welding, bonding, welding, etc., depending on the materials of both.
- the shaft portion and the head constituting the weight are separated from each other.
- fixing the weight to the diaphragm first, the shaft portion is fixed to the diaphragm, and then the both sides of the diaphragm are slid. It is characterized in that the electrode substrates are laminated with a spacer therebetween, and thereafter, the head is fixed to the shaft. According to this manufacturing method, the same operation and effect as the above-described manufacturing method can be obtained.
- a convex portion is formed at a fixed portion of the shaft portion of the weight with respect to the diaphragm, while a positioning fitting hole for fitting the convex portion is formed in the diaphragm, and the shaft portion is formed.
- the weight can be easily positioned with respect to the diaphragm by fitting the protrusion into the fitting hole when fixing the weight to the diaphragm.
- FIG. 1 is a rear view showing a state in which a circuit board is connected to the acceleration sensor according to the first embodiment of the present invention.
- FIG. 2 is a sectional view taken along the line II-II of FIG.
- FIG. 3 is a plan view of the diaphragm according to the first embodiment.
- FIG. 4 is a plan view of the spacer according to the first embodiment.
- 5A and 5B are an inner view and an outer view of the upper electrode substrate according to the first embodiment.
- 6A and 6B are an inner view and an outer view of the lower electrode substrate according to the first embodiment.
- FIG. 7 is a partial cross-sectional side view of the weight according to the first embodiment.
- FIG. 8 is a partial cross-sectional side view of the swage pin according to the first embodiment.
- FIG. 9A to FIG. 9F are diagrams sequentially showing the steps of assembling the detection hood of the acceleration sensor according to the first embodiment.
- FIG. 10A to FIG. 10F are diagrams sequentially showing an assembly process of the acceleration sensor detection unit according to the second embodiment of the present invention.
- FIG. 118 to FIG. 11E are diagrams sequentially illustrating the assembly process of the detection unit of the acceleration sensor according to the third embodiment of the present invention.
- FIG. 1 is a rear view of a state in which a circuit board 2 is connected to a capacitive acceleration sensor 1 according to one embodiment
- FIG. 2 is a cross-sectional view taken along the line II-II of FIG.
- the acceleration sensor 1 according to the present embodiment is of a three-axis type that detects acceleration in three directions of XYZ, as shown in FIG.
- I have.
- These components are the main components for acceleration detection and constitute the detection unit 1A.
- the electrode substrates 30 and 40 based on the arrangement shown in FIG. 2 will be referred to as an upper electrode substrate 30 and a lower electrode substrate 40 as necessary.
- the diaphragm 10 also has a conductive property such as stainless steel and also serves as a single common electrode made of an elastically deformable metal thin plate, and is formed in a substantially square shape as shown in FIG.
- a dowel hole (fitting hole) 11 is formed for positioning the weight 50.
- the plane direction of the diaphragm 10 is the XY plane
- the axis passing through the center of the weight 50 orthogonal to the plane direction of the diaphragm 10 is the Z axis.
- a plurality of arc-shaped slits 12 are formed in the outer peripheral portion of the diaphragm 10 in a point-symmetric manner.
- the inner side of the outermost peripheral portion of the slit 12 is formed as an elastically deformable portion, and the diaphragm 10 is joined to the center of the elastically deformable portion.
- a circular positioning hole 13 is formed near the pair of diagonal portions.
- circular pin holes 14 are formed at predetermined positions near the corners of the four corners, and some of these pin holes 14 communicate with the outermost peripheral portion of the slit 12. .
- the spacer 20 is also made of a thin metal plate such as stainless steel. As shown in FIG. 4, the outer shape of the spacer is square, and the inner hole 21 is a substantially circular frame-shaped thin plate.
- the spacer 20 is laminated on both sides of the diaphragm 10, and the spacer 20 has a circular shape that coincides concentrically with the positioning hole 13 and the pin hole 14 of the diaphragm 10 in the laminated state. Positioning holes 23 and pin holes 24 are formed.
- Each of the electrode substrates 30 and 40 is formed in a square shape using an insulating material. It has sufficient rigidity, and has circular center holes 31 and 41 formed at the center.
- the center hole 31 of the upper electrode substrate 30 is a hole through which a shaft portion 52 of a weight 50 described later passes, and the hole diameter is set to a diameter that restricts tilting of the weight 50.
- the center hole 41 of the lower electrode substrate 40 is a working hole used when the weight 50 is welded to the diaphragm 10.
- These electrode substrates 30 and 40 are respectively laminated on both sides of the diaphragm 10 with the spacer 20 interposed therebetween.
- 5A and 5B show the inner surface (the surface facing the diaphragm 10) and the outer surface of the upper electrode substrate 30, respectively.
- FIGS. 6A and 6B show the inner and outer surfaces of the lower electrode substrate 40, respectively. Are shown respectively.
- a detection electrode 32 patterned in a point-symmetric manner is formed on the inner surface of the upper electrode substrate 30, a detection electrode 32 patterned in a point-symmetric manner is formed.
- the detection electrodes 32 are divided into an X-direction detection electrode for detecting displacement in the X direction, a Y-direction detection electrode for detecting displacement in the Y direction, and a Z-direction detection electrode for detecting displacement in the Z direction.
- a plurality of wiring electrodes 33 patterned in an appropriate shape corresponding to the detection electrodes 32 are formed on the outer surface.
- an electrode for grounding is formed.
- a plurality of detection electrodes 42 and a plurality of wiring electrodes 43 are similarly formed on the inner surface and the outer surface of the lower electrode substrate 40. ing.
- the corresponding detection electrode and wiring electrode (detection electrode 32 and wiring electrode 33, detection electrode 42 and wiring electrode 43) are respectively connected to the through-hole conduction path 34. , 4 Conducted by 4.
- the electrode substrates 30 and 40 are concentric with the positioning holes 13 and 23 and the pin holes 14 and 24 of the diaphragm 10 and the spacer 20 in a state of being laminated on the diaphragm 10. Corresponding pin holes 35, 45 are formed respectively. And each Around the pin holes 35, 45 on the outer surfaces of the electrode substrates 30, 40, annular terminals 33a, 43a are formed as part of the pattern of the wiring electrodes 33, 43, respectively. The diameter of the pin holes 35 and 45 is set to be the same as the diameter of the positioning holes 13 and 23.
- the terminals 33a and 43a and the electrodes 32, 33, 42, and 43 are formed by, for example, etching a copper foil.
- the weight 50 is made of metal such as stainless steel, as shown in FIG. 7, and has a disk-shaped head 51 and a cylindrical shaft 52 extending perpendicularly from the center of one side of the head 51. But — presents a generalized mushroom type.
- the shaft portion 52 side of the head 51 is formed in a tapered shape, and the thickness of the tapered portion 51a is about 1/2 of the thickness of the entire head 51.
- a dowel (convex portion) 52 b fitted into the dowel hole 11 of the diaphragm 10 is formed at the tip of the shaft portion 52.
- the diameter of the shaft 52 is smaller than the diameter of the central holes 31 and 41 of the electrode substrates 30 and 40, and the diameter of the head 51 is sufficiently larger than the diameter of the central holes 31 and 41. are doing.
- the diaphragm 10, the two spacers 20, and the two electrode substrates 30 and 40 are stacked as shown in FIG. 2 and are fixed to each other by caulking pins 60 having conductivity.
- the caulking pin 60 has a long pin portion 62 and a short pin portion (extended portion) 63 formed on both sides of the flange portion 61, and the tip of the long pin portion 62 is cylindrical. This is the force crimp portion 62a.
- the outer diameter of each pin section 62, 63 is the same, and it is almost in the positioning holes 13 and 23 of the diaphragm 10 and the spacer 20 and the pin holes 35 and 45 of the electrode boards 30 and 40. The dimensions are set so that there is no gap.
- the diaphragm 10, the two spacers 20 and the electrode substrates 30, 40 are laminated, and these are fixed using the caulking pins 60. Further, the weight 50 is joined to the diaphragm 10 to detect the unit 1 A. 9A to 9F with reference to FIGS. 9A to 9F. Will be explained.
- the spacer 20 is placed on the upper electrode substrate 30 with the inner surface facing upward, and the diaphragm 10 is placed on the spacer 20 (FIGS. 9A to 9C).
- the spacer 20 is overlaid on the diaphragm 10, and the lower electrode substrate 40 with the inner surface facing down is overlaid on the spacer 20 (FIGS. 9D to 9E).
- the crushed force crimping portion 62a and the terminal 33a of the upper electrode substrate 30, the flange 61 and the terminal 43a of the lower electrode substrate 40 are soldered, respectively, and the diaphragm 10,
- the laminate composed of the two spacers 20 and the electrode substrates 30 and 40 is completely fixed.
- the weight 50 is placed with the shaft portion 52 facing upward, the shaft portion 52 is passed through the center hole 31 of the upper electrode substrate 30, and the dowel 52b is fitted into the dowel hole 11 . This allows
- the weight 50 is positioned at the center of. Then, the dowel 52b is welded to the diaphragm 10 using the center hole 41 of the lower electrode substrate 40 (FIG. 9F). As described above, the assembling of the detection unit 1A is completed, and the terminals 33a and 43a of the electrode substrates 30 and 40 corresponding to each other are electrically connected by the caulking pins 60. Next, as shown in FIG. 2, a cover 80 is placed on the upper electrode substrate 30 with a frame-shaped guide 70 interposed therebetween from the weight 50 side, and the claws 81 of the cover 80 are bent. To engage the outer surface of the lower electrode substrate 40 to obtain the acceleration sensor 1.
- the circuit board 2 is connected to the acceleration sensor 1 of the present embodiment.
- the circuit board 2 converts, for example, the electric charges generated by the detection electrodes 32 and 42 into a voltage and calculates and amplifies the voltage.
- the lower side of the acceleration sensor 1 It is laminated on the electrode substrate 40 side.
- the circuit board 2 is formed in a rectangular shape having substantially the same dimensions as the electrode boards 30 and 40, and an IC chip 90 is mounted on the inner surface facing the lower electrode board 40.
- an output terminal (not shown) for outputting a detection current of the acceleration in the X, , and Z directions, and a terminal for power supply grounding are formed.
- the terminal pins 92 are inserted into the pin holes 91 from the side and crimped, and further connected to the soldered terminal pins 92. Further, a pin hole 93 is formed in a portion of the circuit board 2 corresponding to the caulking pin 60, and around the pin hole 93 on the outer surface, as shown in FIG. An input terminal 94 corresponding to each of the terminals 43a is formed.
- the circuit board 2 has the inner surface on which the IC chip 90 is mounted facing the lower electrode substrate 40, and the terminals 3 3a and 4 3a of the electrode substrates 30 and 40, respectively. Insert the short pin 63 of the caulking pin 60 connected to the hole into the pin hole 93, and insert the flange 6 1 on the inner surface. The short pins 63 are soldered to the input terminals 94 while keeping the state in which they are applied, so that the short pins 63 are connected to the acceleration sensor 1 in a stacked state.
- the configuration of the acceleration sensor 1 according to the present embodiment has been described above.
- the diaphragm 10 is elastically deformed by the inertial force generated in the weight 50 that has been subjected to acceleration.
- the distance between the diaphragm 10 and the upper electrode substrate 30 and the lower electrode substrate 40 changes.
- the change in the capacitance generated by this change is detected as a change in the charge generated by the detection electrodes 32 and 42, and the triaxial acceleration based on the charge is detected.
- An electrode space is provided between the diaphragm 10 and each of the electrode substrates 30 and 40 by the spacer 20 to allow the diaphragm 10 to elastically deform.
- the weight 50 subjected to the acceleration tilts due to the elastic deformation of the diaphragm 10, but the taper portion 51a is formed, so that interference with the upper electrode substrate 30 is effectively prevented.
- the range of the tilting of the weight 50 is restricted by the shaft portion 52 interfering with the center hole 31, even when a large acceleration exceeding the permissible value is applied, the weight 50 can be tilted. It does not damage 50 or the diaphragm 10 etc.
- the weight 50 force is applied to the shaft portion 52 fixed to the diaphragm 10 through the center hole 31 of the upper electrode substrate 30 and to the shaft portion 52.
- the upper electrode substrate 30 is formed in a mushroom shape with the head 51 disposed on the outer surface side of the upper electrode substrate 30. Since the head 51 of the weight 50 is formed in a disk shape, the height is remarkably reduced with the same weight as compared with a simple columnar weight. Therefore, the detection sensitivity is ensured and the height of the acceleration sensor 1 itself is suppressed, so that the size can be reduced.
- the tapered portion 51a is formed in the head 51 of the weight 50. However, if the head 51 is flat, The tapered portion 51a is not necessarily required, and may be, for example, a simple disk shape.
- the diaphragm 10, the two spacers 20, and the electrode substrates 30 and 40 are stacked and assembled.
- the shaft portion 52 of the weight 50 is welded to the diaphragm 10 to join the weight 50 to the diaphragm 10.
- the shaft portion 52 of the weight 50 is passed through the center hole 31 of the upper electrode substrate 30 and joined to the diaphragm 10 so that the center hole 31 of the upper electrode substrate 30 is formed.
- FIG. 10A to 10C show another example of an assembling process of the detection unit 1A as a second embodiment of the present invention.
- the shaft portion 52 of the weight 50 installed with the shaft portion 52 facing upward is passed through the center hole 31 of the upper electrode substrate 30 with the inner surface facing upward, and the upper electrode substrate 30 The spacer 20 on the top (Fig. 10A to 10C).
- the diaphragm 10 is placed on the spacer 20 and the shaft portion 52 of the weight 50 is welded to the center of the diaphragm 10 (FIG. 10D).
- a spacer 20 is superimposed on the diaphragm 10, and a lower electrode substrate 40 with the inner surface facing down is superimposed on the spacer 20 (FIGS. 10E to 10F). ).
- the diaphragm 10, the spacer 20 and the electrode substrates 30 and 40 are positioned, fixed, and connected to the terminals by the force shim pins 60 to obtain the detection unit 1A.
- the weight 50 Since the lower electrode substrate 40 is bonded to the lower electrode substrate 40, it is not necessary to particularly form the center hole 41.
- FIGS. 11A to 11E show, as a third embodiment of the present invention, an example in which the head 51 and the shaft portion 52 of the weight 50 are separated from each other. This shows the process of assembling the detection unit 1A.
- the head 51 is finally fixed to the shaft part 52 of the weight 50, but the end face on the side to which the head 51 is fixed (not shown in Figs. 11-18 to 11E)
- a dowel 52c is formed at the center of.
- a dowel hole 51c into which the dowel 52c fits is formed at the center of the head 51.
- the center of the diaphragm 10 is welded to the upper surface of the shaft 52 with the dowel 52c facing downward (FIGS. 11A to 11B).
- the spacers 20 are respectively stacked on both surfaces of the diaphragm 10, and the upper electrode substrate 30 with the inner surface facing upward is placed on the lower spacer 20, and the shaft portion 5 is placed on the center hole 31.
- the lower electrode substrate 40 with its inner surface facing down is stacked on the upper spacer 20 (FIGS. 11 to 11D).
- the positioning, fixing, and terminal connection of the diaphragm 10, spacer 20, and electrode substrates 30, 40 are performed by the caulking pins 60.
- the shaft portion 52 of the weight 50 is passed through the center hole 31 of the upper electrode substrate 30. Therefore, the same effect as that of the first embodiment is obtained, that is, the detection sensitivity is secured by not having to enlarge the center hole 31, and the weight 5 is also reduced. It is possible to obtain the effect of reducing the height of 0, such as miniaturization.
- the head 51 is made heavier than the shaft 52 to increase the moment and to perform detection.
- the sensitivity can be improved.
- the head 51 is made of metal and the shaft 52 is made of resin, or the head 51 is made of brass and the shaft 52 is made of stainless steel even if it is made of the same metal.
- the weight is disposed on the shaft portion passed through the through hole of one electrode substrate and fixed to the diaphragm, and disposed on the outer surface side of the one electrode substrate.
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Abstract
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003246267A AU2003246267A1 (en) | 2002-08-22 | 2003-07-03 | Capacitance-type acceleration sensor and method of manufacturing the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002242243A JP2004085203A (ja) | 2002-08-22 | 2002-08-22 | 静電容量型加速度センサおよびその製造方法 |
JP2002-242243 | 2002-08-22 |
Publications (1)
Publication Number | Publication Date |
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WO2004019049A1 true WO2004019049A1 (ja) | 2004-03-04 |
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ID=31944013
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2003/008507 WO2004019049A1 (ja) | 2002-08-22 | 2003-07-03 | 静電容量型加速度センサおよびその製造方法 |
Country Status (4)
Country | Link |
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JP (1) | JP2004085203A (ja) |
CN (1) | CN1675556A (ja) |
AU (1) | AU2003246267A1 (ja) |
WO (1) | WO2004019049A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7430915B2 (en) * | 2003-09-02 | 2008-10-07 | Hosiden Corporation | Vibration sensor |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005331281A (ja) * | 2004-05-18 | 2005-12-02 | Hosiden Corp | 振動センサ |
CN101529257B (zh) * | 2006-11-14 | 2011-06-15 | 松下电器产业株式会社 | 传感器 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11133055A (ja) * | 1997-10-24 | 1999-05-21 | Naigai Rubber Kk | 静電容量形3軸加速度センサ |
JPH11248736A (ja) * | 1998-02-26 | 1999-09-17 | Yazaki Corp | 静電容量型加速度センサ及びその製造方法 |
US6378381B1 (en) * | 1999-03-01 | 2002-04-30 | Wacoh Corporation | Sensor using capacitance element |
-
2002
- 2002-08-22 JP JP2002242243A patent/JP2004085203A/ja active Pending
-
2003
- 2003-07-03 WO PCT/JP2003/008507 patent/WO2004019049A1/ja active Application Filing
- 2003-07-03 AU AU2003246267A patent/AU2003246267A1/en not_active Abandoned
- 2003-07-03 CN CN 03819626 patent/CN1675556A/zh active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11133055A (ja) * | 1997-10-24 | 1999-05-21 | Naigai Rubber Kk | 静電容量形3軸加速度センサ |
JPH11248736A (ja) * | 1998-02-26 | 1999-09-17 | Yazaki Corp | 静電容量型加速度センサ及びその製造方法 |
US6378381B1 (en) * | 1999-03-01 | 2002-04-30 | Wacoh Corporation | Sensor using capacitance element |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7430915B2 (en) * | 2003-09-02 | 2008-10-07 | Hosiden Corporation | Vibration sensor |
Also Published As
Publication number | Publication date |
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JP2004085203A (ja) | 2004-03-18 |
CN1675556A (zh) | 2005-09-28 |
AU2003246267A1 (en) | 2004-03-11 |
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