WO2005080931A1 - 歪センサ - Google Patents
歪センサ Download PDFInfo
- Publication number
- WO2005080931A1 WO2005080931A1 PCT/JP2004/002071 JP2004002071W WO2005080931A1 WO 2005080931 A1 WO2005080931 A1 WO 2005080931A1 JP 2004002071 W JP2004002071 W JP 2004002071W WO 2005080931 A1 WO2005080931 A1 WO 2005080931A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- washer
- substrate
- hole
- strain sensor
- pusher
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2206—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
- G01L1/2231—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports the supports being disc- or ring-shaped, adapted for measuring a force along a single direction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2206—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
Definitions
- the present invention relates to a strain sensor that detects a strain generated by an external force caused by a human weight, a weight of a vehicle such as an automobile, and the like by a strain detection element provided on a sensor substrate.
- a conventional strain sensor is disclosed, for example, in Japanese Utility Model Laid-Open No. 5-57605.
- a conventional strain sensor will be described with reference to the drawings.
- FIG. 8 is a perspective view of a conventional strain sensor
- FIG. 9 is a side sectional view showing a state where the conventional strain sensor is fixed to a member to be detected.
- the sensor substrate 1 made of metal has fixing holes 2 and 3.
- a strain detecting element 4 composed of a strain gauge is provided on the upper surface.
- the strain detecting element 4 has an element portion 5 and a lead wire 6 that is electrically connected to the element portion 5 and protrudes outward.
- the detected member 8 is provided with a pair of female screws 7 in advance.
- the sensor substrate 1 is fixed to the detected member 8 by screwing a male screw 9 to the female screw 7 via the sensor substrate 1.
- the inner diameters of the fixing holes 2 and 3 are larger than the outer diameter of the female screw 7. This is because the sensor board 1 is securely attached to the detected member 8 in consideration of the variation in the pitch of the female screw 7 provided on the detected member 8.
- the detected member 8 is distorted, and the sensor substrate 1 is deformed by the distortion.
- the deformation of the sensor substrate 1 is taken out from the lead wire 6 as a voltage change due to a change in the resistance value of the strain detecting element 4 provided on the upper surface of the sensor substrate 1. Thereby, the external force generated in the detected member 8 is detected.
- the male screw 9 is replaced with the female screw 7
- the torsion force of the male screw 9 acts.
- an internal stress is generated in the sensor substrate 1 by the torsional force.
- the distortion detection element 4 is distorted, and an output signal is generated even when no external force is applied to the sensor substrate 1.
- the output signal of the strain sensor becomes unstable. Disclosure of the invention
- the fixing member includes the upper washer and the lower washer.
- the fixing member is fixed to the sensor substrate by sandwiching the sensor substrate between the upper washer and the lower washer.
- a strain detecting element is arranged on the sensor substrate.
- the strain sensor configured as described above is fixed to an object to be measured via a fixing member.
- FIG. 1 is a top view of a strain sensor according to an embodiment of the present invention.
- FIG. 2 is a side sectional view of the strain sensor of FIG.
- FIG. 3 is an exploded perspective view showing a state before the first fixing member in the strain sensor of FIG. 1 is fixed to the sensor substrate.
- FIG. 4 is a top view of a sensor substrate in the strain sensor of FIG.
- FIG. 5 is a side sectional view showing a state in which the strain sensor of FIG. 1 operates.
- FIG. 6 is a side sectional view of another strain sensor according to the embodiment of the present invention.
- FIG. 7 is an exploded perspective view showing a state before the first fixing member in the strain sensor of FIG. 6 is fixed to the sensor substrate.
- FIG. 8 is a perspective view of a conventional strain sensor.
- FIG. 9 is a side sectional view showing a state where a conventional strain sensor is fixed to a member to be detected.
- FIG. 1 is a top view of a strain sensor according to an embodiment of the present invention
- FIG. FIG. 3 is a side sectional view of the strain sensor
- FIG. 3 is an exploded perspective view showing a state before a first fixing member of the strain sensor is fixed to a sensor substrate
- FIG. 4 is a top view of the sensor substrate in the strain sensor.
- the sensor substrate (hereinafter, “substrate”) 11 has a first fixing hole (hereinafter, “hole”) from the upper surface (first surface) to the “F surface (second surface opposite to the first surface)” on the first end side.
- a second fixing member (hereinafter, hole) 13 is provided substantially at the center from the upper surface to the lower surface, and furthermore, the second fixed member 13 is provided at the substantially center between the holes 12 and 13.
- a detection hole (hereinafter, hole) 14 is provided over the lower surface, and a power electrode 15 is provided on the second end side of the substrate 11.
- the power electrode 15 has a first distortion.
- a first end of a detection element (hereinafter, element) 16 is electrically connected to a first end of a second strain detection element (hereinafter, element) 17 via a circuit pattern 18.
- element 1 The second end of 6 is electrically connected to the first output electrode 19.
- the second end of the element 17 is connected to the second output electrode 20 and a third strain detecting element (hereinafter referred to as an element). )
- a fourth strain detecting element (hereinafter, element) 23 is provided on the upper surface of the substrate 11. The first end of element 23 is connected to the second end of element 16
- G ND electrode 22 and circuit pattern 18 constitute a bridge circuit
- IC 24 is provided on the upper surface on the second end side of the substrate 11.
- C 24 amplifies the differential voltage between the voltage of the first output electrode 19 and the voltage of the second output electrode 20, and is connected to the connector 25 provided on the second end of the substrate 11.
- an external electrode fk electrode 26 is provided on the upper surface on the second end side of the substrate 11.
- the external power supply electrode 26 is electrically connected to the power supply electrode 15.
- An external GND electrode 27 is provided on the upper surface of the substrate 11. The external GND electrode 27 is electrically connected to the GND electrode 22.
- the first fixing member (hereinafter referred to as a member) 28 includes a first metal upper washer (hereinafter referred to as a “washer”) 29 and a first metal lower washer (hereinafter referred to as “a member”). (Pusher) 30.
- the washer 29 is in contact with the upper surface of the substrate 11, and the washer 30 is in contact with the lower surface of the substrate 11.
- the pusher 29 has a circular contact portion 31 contacting the upper surface of the substrate 11 and an insertion portion 32 inserted into the hole 12 of the substrate 11.
- the washer 30 also has a circular abutting portion 33 that abuts on the lower surface of the substrate 11, and an insertion portion 34 that is inserted into the hole 12.
- the member 28 is fixed to the substrate 11 by press-fitting the outer periphery of the insertion portion 32 of the washer 29 into the inner periphery 34A of the insertion portion 34 of the washer 30.
- the insertion portion 34 of the washer 30 is inserted into the fixing hole 12 with a gap provided between the fixing hole 12 and the hole 12.
- the internal stress is not applied to the substrate 11, and the pushers 29 and 30 are connected to the substrate 1 with no internal stress. 1 is pinched.
- the member 28 is fixed to the substrate 11 in a state where no internal stress is applied to the substrate 11. Also, the member 28 does not come off the substrate 11.
- the second fixing member (hereinafter referred to as member) 35 also has a second metal upper side (hereinafter referred to as "washer”) washer 36 and a second lower side metal washer (hereinafter referred to as "member”).
- the detection member (hereinafter, member) 38 includes a metal detection portion upper washer (hereinafter, washer) 39 and a metal detection portion lower washer (hereinafter, isher) 40.
- the member 28 and the member 35 are fixed to the base (not shown) of the DUT through the holes 51 and 53, and the member 38 is distorted by the DUT through the hole 52. It is fixed to a point (not shown) and receives the distortion force of the DUT.
- the end of member 38 that comes into contact with substrate 11 External force acts on 38 A. Further, a reaction force acts on an end 28 A of the member 28 that contacts the substrate 11 and an end 35 A of the member 35 that contacts the substrate 11.
- holes 1 2 and 3 were prepared in a metal base material (not shown) prepared in advance.
- the substrate 11 is formed by baking at 0 ° C for about 45 minutes.
- a metal glaze-based paste is printed on the upper surface of the substrate 11 and baked at about 850 ° C. for about 45 minutes. And the board
- Elements 16, 17, 21, and 23 are formed on the upper surface of 11. Then, a silver paste is printed at a position where the power supply electrode 15, the first output electrode 19, the second output electrode 20, the GND electrode 22, and the circuit pattern 18 are provided. Bake at 85 Ot: for about 45 minutes. In this way the power electrode
- a first output electrode 19 a second output electrode 20, a GND electrode 22 and a circuit pattern 18 are formed. Subsequently, IC 24 is mounted on the upper surface of the substrate 11.
- the insertion portion 34 of the washer 30 is inserted from below the hole 12, and then the insertion portion 32 of the washer 29 is inserted from above the hole 12. Then, the upper surface of the contact portion 33 of the pusher 30 is brought into contact with the lower surface of the substrate 11, and the lower surface of the contact portion 31 of the pusher 29 is brought into contact with the upper surface of the substrate 11. At this time, the member 28 is fixed to the substrate 11 by pressing the outer periphery of the insertion portion 32 into the inner periphery of the insertion portion 34.
- the member 28 is fixed to the substrate 11 by sandwiching the substrate 11 between the washers 29 and 30.
- the member 28 is fixed to the substrate 11 by the force in the direction perpendicular to the thickness of the substrate 11, which is generated when the hash 29 and the hash 30 sandwich the substrate 11. You. For this reason, twist around the hole 12 in the substrate 11 No internal stress is generated. Thereby, stress is not always applied to the element 21 located in the vicinity of the hole 12. Therefore, the output signal of the strain sensor is stabilized.
- a member 35 composed of the washers 36 and 37 is positioned near the hole 13 in the substrate 11 and fixed.
- a member 38 constituted by the washers 39 and 40 is positioned near the hole 14 in the substrate 11 and fixed.
- FIG. 5 is a side sectional view showing a state in which the strain sensor in this configuration operates.
- the reaction force applied to the member 28 includes a vector for rotating the member 28 in the circumferential direction. Therefore, it is possible that the member 28 rotates.
- the pusher 29 is provided with a contact portion 31 that comes into contact with the upper surface of the substrate 11.
- the cache 30 is provided with a contact portion 33 that is in contact with the lower surface of the substrate 11.
- Each of these contact portions 31 and 33 is formed in a circular shape. Therefore, even if the pusher 29 is on the upper surface of the substrate 11 and the pusher 30 is on the lower surface, the position of the contact portion with the substrate 11 in the washers 29 and 30 is not changed even when rotating in the circumferential direction. 11 Does not shift in the longitudinal direction.
- the insertion portion 34 of the washer 30 is inserted from below the hole 12 in the substrate 11, and then the insertion portion 3 2 of the washer 29 is inserted from above the hole 12. I do. Then, the upper surface of the contact portion 33 in the washer 30 is brought into contact with the lower surface of the substrate 11. Then, the lower surface of the contact portion 31 of the washer 29 is brought into contact with the upper surface of the substrate 11. At this time, the member 28 is fixed to the substrate 11 by pressing the outer periphery of the insertion portion 32 into the inner periphery of the insertion portion 34.
- the insertion portion 34 may be inserted into the washer 30 from above the hole 12.
- the upper surface of the contact portion 31 of the washer 29 is brought into contact with the lower surface of the substrate 11.
- the lower surface of the contact portion 33 of the washer 30 is brought into contact with the upper surface of the substrate 11.
- the member 28 is fixed to the substrate 11 by press-fitting the inner peripheral portion of the insertion portion 34 into the outer peripheral portion of the insertion portion 32. Even in this case, the same effect as described above can be obtained.
- the members 35 and 38 are the same as the members 28.
- FIG. 6 is a side sectional view of another strain sensor according to the embodiment of the present invention
- FIG. 7 is an exploded perspective view showing a state before a first fixing member of the strain sensor is fixed to a sensor substrate.
- the first fixing member (hereinafter, “member”) 41 is composed of a first metal upper washer (hereinafter, “washer”) 29 and a first metal lower washer (hereinafter, “washer”) 4 4. And 2.
- the washer 29 contacts the upper surface of the substrate 11 and the washer 42 contacts the lower surface of the substrate 11.
- the upper surface of the pusher 42 is in contact with the lower surface of the substrate 11 and a hole 43 is provided from the upper surface to the lower surface. Then, by inserting the insertion portion 32 of the pusher 29 into the hole 43 by press-fitting, the member 41 including the pusher 29 and the pusher 42 is fixed to the substrate 11.
- the second fixing member (hereinafter referred to as the member) 44 is also a first upper washer made of metal (hereinafter referred to as a "washer”) 36 and a second lower washer made of metal. (Hereinafter referred to as “Pusher”) 4 and 5
- the detection member (hereinafter, member) 46 is also constituted by a metal detection part upper washer (hereinafter, referred to as “pusher”) 39 and a metal detection part lower washer 47 (her”). I have.
- the washers 36 and 39 have the same structure as the washer 29, and the washers 45 and 47 have the same structure as the washer 42.
- the first fixing member 44 1 and the member 44 are fixed to the base part (not shown) of the DUT through holes 61 and 63, and the member 46 is covered through the hole 62. It is fixed to the place where distortion occurs on the measurement object (not shown).
- the insertion portion 32 is provided in the washer 29, the hole 43 is provided in the washer 42, and the insertion portion 32 is press-fitted into the hole 43.
- the member 41 is fixed to the substrate 11. Therefore, the entire washer 42 is involved in the press-fitting with the washer 29. Further, the thickness of the insertion portion 32 in the washer 29 can be increased, and as a result, the strength of the member 41 is improved.
- the first and second fixing members 41, 44, and the washers 29, 36, 39 of the member 46 have insertion portions. Holes are provided in the washers 42, 45, and 47 in the members 41, 44, 46. And pusher 29,
- An inlet may be provided at 47 and holes may be provided at the upper washers 29, 36, and 39. Then, the insertion portions of the washers 42, 45, and 47 are press-fitted into the holes of the washers 29, 36, and 39. In this way, even when the members 41, 44, and 46 are fixed to the substrate 11, the same effect can be obtained.
- the washers are all made of metal having mechanical strength, but may be made of other materials having mechanical strength such as ceramics.
- the detection member is fixed to the detection hole 14 and
- the material is fixed to the part of the object to be measured where distortion occurs.
- a member for fixing the substrate 11 and an object to be measured are provided separately, such as a mouth cell, the detection hole 14 and the detection member are not provided, and the detection hole 14 on the substrate 11 is not provided.
- a configuration in which a force is directly applied to the corresponding position may be adopted.
- two fixing holes are used, but one fixing hole may be used depending on the design of the mounting structure.
- the fixing member is constituted by the upper washer and the lower washer, respectively, and the sensor board is held between the upper washer and the lower washer.
- the fixing member is fixed to the sensor substrate. Therefore, the fixing member is fixed to the sensor substrate by the force in the vertical direction and the thickness of the sensor substrate generated by sandwiching the sensor substrate between the upper washer and the lower washer. This causes internal stress due to torsion around the fixing hole in the sensor board.
- a strain sensor with a stable signal can be obtained.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2004/002071 WO2005080931A1 (ja) | 2004-02-23 | 2004-02-23 | 歪センサ |
US10/585,847 US7520175B2 (en) | 2004-02-23 | 2004-02-23 | Strain sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2004/002071 WO2005080931A1 (ja) | 2004-02-23 | 2004-02-23 | 歪センサ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005080931A1 true WO2005080931A1 (ja) | 2005-09-01 |
Family
ID=34878959
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/002071 WO2005080931A1 (ja) | 2004-02-23 | 2004-02-23 | 歪センサ |
Country Status (2)
Country | Link |
---|---|
US (1) | US7520175B2 (ja) |
WO (1) | WO2005080931A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7487687B2 (en) | 2006-10-31 | 2009-02-10 | Aisin Seiki Kabushiki Kaisha | Occupant load sensor of seat for vehicle |
US7490523B2 (en) | 2006-10-31 | 2009-02-17 | Aisin Seiki Kabushiki Kaisha | Occupant load detecting device of seat for vehicle |
US7509871B2 (en) | 2006-10-31 | 2009-03-31 | Aisin Seiki Kabushiki Kaisha | Occupant load sensor for vehicle |
US7555960B2 (en) | 2006-10-31 | 2009-07-07 | Aisin Seiki Kabushiki Kaisha | Occupant load sensor for a vehicle seat with flexible printed circuitry |
US7712374B2 (en) | 2007-09-07 | 2010-05-11 | Aisin Seiki Kabushiki Kaisha | Load detecting apparatus |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4695358B2 (ja) | 2004-07-30 | 2011-06-08 | テイ・エス テック株式会社 | 車両用シートの乗員重量測定装置 |
EP1946960B1 (en) | 2005-09-30 | 2010-09-08 | TS Tech Co., Ltd. | Occupant weight measurement device for vehicle seat |
DE102007044225A1 (de) * | 2007-09-17 | 2009-03-19 | Liebherr-Werk Nenzing Gmbh, Nenzing | Vorrichtung zum Messen mechanischer Größen, Verfahren zum Messen mechanischer Größen sowie Verwendung einer Vorrichtung zum Messen mechanischer Größen |
JP5003431B2 (ja) * | 2007-11-21 | 2012-08-15 | アイシン精機株式会社 | 車両用シートの荷重検出装置 |
US8258413B2 (en) * | 2008-11-19 | 2012-09-04 | Aisin Seiki Kabushiki Kaisha | Vehicle seat load detection device having interspace to receive projecting portion scraped off from press-fitted shaft member |
US9483674B1 (en) | 2014-03-07 | 2016-11-01 | United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | RFID torque sensing tag system for fasteners |
WO2016063163A1 (en) | 2014-10-23 | 2016-04-28 | Koninklijke Philips N.V. | Shape sensing for flexible ultrasound transducers |
US9887165B2 (en) | 2014-12-10 | 2018-02-06 | Stmicroelectronics S.R.L. | IC with insulating trench and related methods |
US9726587B2 (en) | 2015-01-30 | 2017-08-08 | Stmicroelectronics S.R.L. | Tensile stress measurement device with attachment plates and related methods |
JP2016206064A (ja) * | 2015-04-24 | 2016-12-08 | アイシン精機株式会社 | 荷重検出装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55115616A (en) * | 1979-02-27 | 1980-09-05 | Mitsubishi Electric Corp | Spacer |
JP2002090232A (ja) * | 2000-09-18 | 2002-03-27 | Alps Electric Co Ltd | 荷重センサ |
JP2003083707A (ja) * | 2001-09-14 | 2003-03-19 | Matsushita Electric Ind Co Ltd | 歪センサ |
JP2004069535A (ja) * | 2002-08-07 | 2004-03-04 | Matsushita Electric Ind Co Ltd | 歪センサ |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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US5272894A (en) * | 1989-03-22 | 1993-12-28 | Star Lock Systems, Inc. | Fractional-rotation latching system with retrofit capability |
JPH0557605A (ja) | 1991-02-12 | 1993-03-09 | Fuji Electric Co Ltd | 薄板工作物用の両面研摩盤 |
US5233913A (en) * | 1992-08-31 | 1993-08-10 | General Motors Corporation | Swash plate compressor with spring thrust bearing assembly |
US5527240A (en) * | 1995-07-19 | 1996-06-18 | Chen; Chun N. | Gripping power training device |
US5913647A (en) * | 1996-12-20 | 1999-06-22 | Structural Integrity Monitoring Systems, Inc. | Fastener tension indicator |
US6969809B2 (en) * | 2003-09-22 | 2005-11-29 | Cts Corporation | Vehicle seat weight sensor |
-
2004
- 2004-02-23 WO PCT/JP2004/002071 patent/WO2005080931A1/ja active Application Filing
- 2004-02-23 US US10/585,847 patent/US7520175B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55115616A (en) * | 1979-02-27 | 1980-09-05 | Mitsubishi Electric Corp | Spacer |
JP2002090232A (ja) * | 2000-09-18 | 2002-03-27 | Alps Electric Co Ltd | 荷重センサ |
JP2003083707A (ja) * | 2001-09-14 | 2003-03-19 | Matsushita Electric Ind Co Ltd | 歪センサ |
JP2004069535A (ja) * | 2002-08-07 | 2004-03-04 | Matsushita Electric Ind Co Ltd | 歪センサ |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7487687B2 (en) | 2006-10-31 | 2009-02-10 | Aisin Seiki Kabushiki Kaisha | Occupant load sensor of seat for vehicle |
US7490523B2 (en) | 2006-10-31 | 2009-02-17 | Aisin Seiki Kabushiki Kaisha | Occupant load detecting device of seat for vehicle |
US7509871B2 (en) | 2006-10-31 | 2009-03-31 | Aisin Seiki Kabushiki Kaisha | Occupant load sensor for vehicle |
US7555960B2 (en) | 2006-10-31 | 2009-07-07 | Aisin Seiki Kabushiki Kaisha | Occupant load sensor for a vehicle seat with flexible printed circuitry |
US7712374B2 (en) | 2007-09-07 | 2010-05-11 | Aisin Seiki Kabushiki Kaisha | Load detecting apparatus |
Also Published As
Publication number | Publication date |
---|---|
US7520175B2 (en) | 2009-04-21 |
US20080229841A1 (en) | 2008-09-25 |
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