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WO2019159512A1 - Capteur de charge et dispositif de détection de charge - Google Patents

Capteur de charge et dispositif de détection de charge Download PDF

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Publication number
WO2019159512A1
WO2019159512A1 PCT/JP2018/045258 JP2018045258W WO2019159512A1 WO 2019159512 A1 WO2019159512 A1 WO 2019159512A1 JP 2018045258 W JP2018045258 W JP 2018045258W WO 2019159512 A1 WO2019159512 A1 WO 2019159512A1
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WO
WIPO (PCT)
Prior art keywords
circle
strain
load
resistor
load sensor
Prior art date
Application number
PCT/JP2018/045258
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English (en)
Japanese (ja)
Inventor
公宏 横山
朋子 海老沢
Original Assignee
アルプスアルパイン株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by アルプスアルパイン株式会社 filed Critical アルプスアルパイン株式会社
Priority to JP2020500297A priority Critical patent/JPWO2019159512A1/ja
Publication of WO2019159512A1 publication Critical patent/WO2019159512A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
    • G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
    • G01G3/14—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of electrical resistance
    • 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

Definitions

  • the present invention relates to a load sensor and a load detection device.
  • load sensors using strain gauges have been used.
  • a load sensor a sensor in which a bridge circuit is formed by four strain gauges arranged on a strain generating body, and a load is detected by an output voltage of the bridge circuit is known.
  • the conventional load sensor has a problem that when the direction in which the load is applied is not perpendicular to the strain generating body, the strain of the strain generating body is biased and the load detection accuracy is lowered.
  • the present invention has been made in view of the above-described problems, and an object thereof is to improve the detection accuracy of a load sensor having a strain gauge.
  • a load sensor includes a strain generating body provided with a load receiving portion, an insulating layer provided on the strain generating body, and a first resistance portion provided on the insulating layer and connected in series. And a first output terminal that outputs a voltage between the first resistance part and the second resistance part, wherein the first resistance part is connected in series and is a circle or an ellipse
  • a plurality of first strain gauges arranged on the circumference of the first circle, and the second resistance portion is connected in series and arranged on the circumference of the second circle that is a circle or an ellipse.
  • a plurality of second strain gauges are provided, and the first circle and the second circle are concentric circles or concentric ellipses around the load receiving portion.
  • the detection accuracy of a load sensor having a strain gauge can be improved.
  • FIG. 1 The top view which shows an example of the load sensor 100.
  • FIG. The side view which shows an example of the load sensor 100.
  • FIG. The elements on larger scale which show an example of the leg part 5 of FIG. Sectional drawing of the leg part 5 of FIG.
  • a load sensor 100 according to the first embodiment will be described with reference to FIGS.
  • the load sensor 100 according to the present embodiment is a sensor that detects an applied load, and includes a strain gauge.
  • a strain gauge is an element whose resistance value changes according to the strain.
  • FIG. 1 is a plan view showing an example of the load sensor 100.
  • FIG. 2 is a side view showing an example of the load sensor 100.
  • the top, bottom, left, and right in the figure will be described as the top, bottom, left, and right of the load sensor 100.
  • the load sensor 100 includes a strain body 1, an insulating layer 2, a first resistor R 1, a second resistor R 2, a third resistor R 3, and a fourth resistor.
  • a section R4, a first output terminal T1, a first output terminal T2, and a conversion circuit 3 are provided.
  • the strain body 1 is a plate-like member to which a load is applied, and is formed of a metal plate.
  • the load sensor 100 detects a load applied to the strain body 1 by detecting strain of the strain body 1 using a strain gauge. As shown in FIG. 1, the strain body 1 includes a first portion 11 and a second portion 12.
  • the first portion 11 is a circular portion that is distorted according to the load.
  • the first portion 11 has a plurality of openings 13 on the outer peripheral portion, and the outer peripheral portion is fixed to a load detection target by inserting a bolt through each opening 13.
  • a load receiver 14 that receives a load from the detection target is provided at the center of the first portion 11. In this way, by fixing the outer peripheral portion of the circular first portion 11 and applying a load at the center, the distortion of the first portion 11 according to the load can be made uniform.
  • the load receiving portion 14 is a nut having a hemispherical head, is provided on the lower surface of the strain body 1, and is inserted with a screw 15 provided on the upper surface of the strain body 1.
  • the load receiver 14 may be provided on the upper surface of the strain body 1 or may be fixed by a nut. In the latter case, a bolt having a hemispherical head may be used as the load receiving portion 14.
  • the second portion 12 is a substantially rectangular portion extending from the first portion 11.
  • the shape of the second portion 12 can be arbitrarily designed.
  • the insulating layer 2 is an insulating layer provided on the strain body 1.
  • the insulating layer 2 may be an oxide film, a nitride film, or a resin insulating film formed on the strain generating body 1, or an insulating printed board fixed on the strain generating body 1. Also good.
  • the printed circuit board may be a flexible board or a rigid board. In any case, the entire surface of the insulating layer 2 is fixed to the strain generating body 1 so as to be distorted according to the strain of the strain generating body 1.
  • the insulating layer 2 has a first portion 21 and a second portion 22.
  • the first portion 21 is a circular portion that is distorted according to the load.
  • the first portion 21 is fixed to the first portion 11 of the strain body 1 so that the center thereof coincides with the first portion 11.
  • the first portion 11 is provided with a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4.
  • an opening for inserting the screw 15 is provided at the center of the first portion 21.
  • the second portion 22 is a substantially rectangular portion extending from the first portion 21.
  • the shape of the second portion 22 can be arbitrarily designed.
  • the second portion 22 is provided from the first portion 11 to the second portion 12 of the strain body 1.
  • the conversion circuit 3 is provided in the second portion 22 on the second portion 12 of the strain generating body 1.
  • FIG. 3 is a diagram illustrating an example of a circuit configuration of the load sensor 100.
  • the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the first output terminal T1, and the first resistor A two-output terminal T2 and a conversion circuit 3 are provided on the insulating layer 2.
  • the first resistor R1 has one end connected to the power supply and the other end connected to the first output terminal T1.
  • the second resistor unit R1 has one end connected to the first output terminal T1 and the other end connected to the ground. That is, the first resistor R1 and the second resistor R2 are connected in series to form a half bridge circuit.
  • a voltage between the first resistor R1 and the second resistor R2 (a voltage obtained by dividing the power supply voltage Vdd by the first resistor R1 and the second resistor R2) is output from the first output terminal T1 as the output voltage V1. Is output.
  • the first output terminal T ⁇ b> 1 is connected to the conversion circuit 3, and the output voltage V ⁇ b> 1 is input to the conversion circuit 3.
  • the third resistor R3 has one end connected to the power supply and the other end connected to the second output terminal T2.
  • the fourth resistor unit R4 has one end connected to the second output terminal T2 and the other end connected to the ground. That is, the third resistor unit R3 and the fourth resistor unit R4 are connected in series to form a half bridge circuit.
  • a voltage between the third resistor R3 and the fourth resistor R4 (a voltage obtained by dividing the power supply voltage Vdd by the third resistor R3 and the fourth resistor R4) is output from the second output terminal T2 as an output voltage V2. Is output.
  • the second output terminal T2 is connected to the conversion circuit 3, and the output voltage V2 is input to the conversion circuit 3.
  • the third resistor R3 and the fourth resistor R4 are connected in parallel with the first resistor R1 and the second resistor R2, and are bridged together with the first resistor R1 and the second resistor R2. Configure the circuit.
  • each of the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 includes a plurality of strain gauges, and the resistance value changes according to the load.
  • the output voltage V1 becomes a voltage according to the resistance values of the first resistance part R1 and the second resistance part R2 that have changed according to the load.
  • the output voltage V2 becomes a voltage according to the resistance values of the third resistor portion R3 and the fourth resistor portion R4 that have changed according to the load. That is, the output voltages V1, V2 are both voltages according to the load.
  • the conversion circuit 3 is a circuit that detects a load based on the output voltages V1 and V2. Specifically, the conversion circuit 3 converts the difference between the output voltages V1 and V2 into a load with reference to a table prepared in advance. In the example of FIG. 3, it is assumed that the conversion circuit 3 is one IC (Integrated Circuit), but the conversion circuit 3 may be configured by a plurality of discrete components.
  • the first resistance portion R1 includes four first strain gauges r1 connected in series by printed wiring (not shown).
  • the first strain gauge r1 may be formed by printing a resistance material in which a metal material or carbon is mixed with a binder resin on the insulating layer 2, or formed by sticking a metal foil to the insulating layer 2. Also good.
  • the first strain gauge r1 may be an independent element mounted on the insulating layer 2. In any case, the entire surface of the first strain gauge r1 is fixed to the strain generating body 1 so as to be distorted according to the strain of the insulating layer 2.
  • the strain body 1 when a load is applied to the strain body 1, the strain body 1 is distorted according to the load, the insulation layer 2 is distorted together with the strain body 1, and the first strain gauge r1 is strained together with the insulation layer 2.
  • the resistance value of each first strain gauge r1 changes according to the strain, and the resistance value of the first resistance unit R1 changes according to the change of the resistance value of each first strain gauge r1.
  • the output voltage V1 changes according to the load.
  • the first strain gauges r1 are arranged at equal intervals (every 90 °) on the circumference of the first circle centered on the center of the strain body 1 (load receiving portion 14). By disposing each first strain gauge r1 in this way, it is possible to suppress an error in the resistance value of the first resistance portion R1 that occurs when the direction of the load is inclined (not perpendicular) to the strain generating body 1. This is because the strain of the first strain gauge r1 disposed on the side opposite to the tilt direction is decreased at the same time as the strain of the first strain gauge r1 disposed on the tilt direction side of the load is increased. By suppressing the error of the first resistance unit R1, the error of the output voltage V1 can be suppressed.
  • the 1st resistance part R1 should just be provided with the some 1st strain gauge r1, and the number is not restricted to four.
  • the first strain gauges r1 are preferably arranged at equal intervals on the circumference of the first circle. However, it is possible not to arrange the first strain gauges r1 at equal intervals.
  • the second resistance portion R2 includes four second strain gauges r2 connected in series by printed wiring (not shown).
  • the second strain gauge r ⁇ b> 2 may be formed by printing a metal material on the insulating layer 2, or may be formed by attaching a metal foil to the insulating layer 2.
  • the second strain gauge r2 may be an independent element mounted on the insulating layer 2. In either case, the entire surface of the second strain gauge r2 is fixed to the strain generating body 1 so as to be distorted in accordance with the strain of the insulating layer 2.
  • the strain generating body 1 when a load is applied to the strain generating body 1, the strain generating body 1 is strained according to the load, the strain generating body 1 and the insulating layer 2 are strained, and the insulating layer 2 and the second strain gauge r2 are strained.
  • the resistance value of each second strain gauge r2 changes according to the strain, and the resistance value of the second resistance portion R2 changes according to the change of the resistance value of each second strain gauge r2.
  • the output voltage V1 changes according to the load.
  • the second strain gauges r2 are arranged at equal intervals (every 90 °) on the circumference of the second circle with the center of the strain generating body 1 as the center.
  • the second circle is a concentric circle of the first circle smaller than the first circle.
  • the outer peripheral portion of the first portion 11 is fixed, when a load is applied to the strain generating body 1, the central portion side and the outer peripheral portion side of the first portion 11 are distorted in opposite directions.
  • the resistance value of the gauge r2 changes in the opposite direction. That is, when a load is applied to the strain body 1, the resistance value of the first resistance part R1 and the resistance value of the second resistance part R2 change in opposite directions.
  • the first resistor R1 and the second resistor R2 constitute a half-bridge circuit, and the voltage between the first resistor R1 and the second resistor R2 is output as the output voltage V1. The corresponding change in the output voltage V1 can be amplified.
  • the 2nd resistance part R2 should just be equipped with several 2nd strain gauge r2, and the number is not restricted to four.
  • the second strain gauges r2 are preferably arranged at equal intervals on the circumference of the second circle. However, it is possible not to arrange the second strain gauges r2 at equal intervals.
  • each second strain gauge r2 is preferably disposed between the center of the first circle and the second circle and each first strain gauge r1.
  • each second strain gauge r2 is preferably arranged on a line segment connecting the centers of the first circle and the second circle and each first strain gauge r1.
  • the third resistance portion R3 includes four third strain gauges r3 connected in series by printed wiring (not shown).
  • the third strain gauge r3 may be formed by printing a metal material on the insulating layer 2, or may be formed by attaching a metal foil to the insulating layer 2.
  • the third strain gauge r3 may be an independent element mounted on the insulating layer 2. In any case, the entire surface of the third strain gauge r3 is fixed to the strain generating body 1 so as to be distorted according to the strain of the insulating layer 2.
  • the strain generating body 1 when a load is applied to the strain generating body 1, the strain generating body 1 is strained according to the load, the insulating layer 2 is strained together with the strain generating body 1, and the third strain gauge r3 is strained together with the insulating layer 2.
  • the resistance value of each third strain gauge r3 changes according to the strain, and the resistance value of the third resistance portion R3 changes according to the change of the resistance value of each third strain gauge r3.
  • the output voltage V2 changes according to the load.
  • the third strain gauges r3 are arranged at equal intervals (every 90 °) on the circumference of the third circle centered on the center of the strain body 1 (load receiving portion 14). By disposing each third strain gauge r3 in this way, it is possible to suppress an error in the resistance value of the third resistance portion R3 that occurs when the direction of the load is inclined (not vertical) with respect to the strain generating body 1. This is because the strain of the third strain gauge r3 disposed on the side opposite to the tilt direction is reduced at the same time as the strain of the third strain gauge r3 disposed on the load tilt direction side is increased. By suppressing the error of the third resistor R3, the error of the output voltage V2 can be suppressed.
  • the third resistor R3 only needs to include a plurality of third strain gauges r3, and the number is not limited to four. In any case, the third strain gauges r3 are preferably arranged at equal intervals on the circumference of the third circle. However, it is possible not to arrange the third strain gauges r3 at equal intervals.
  • the first strain gauges r1 and the third strain gauges r3 are alternately arranged at equal intervals (every 45 °). Thereby, the difference
  • the first circle and the third circle are preferably the same. That is, it is preferable that the first strain gauge r1 and the third strain gauge r3 are arranged on the same circumference. Thereby, the change of the resistance value of 1st resistance part R1 according to a load and the change of the resistance value of 3rd resistance part R3 can be equalize
  • the fourth resistance portion R4 includes four fourth strain gauges r4 connected in series by printed wiring (not shown).
  • the fourth strain gauge r4 may be formed by printing a metal material on the insulating layer 2, or may be formed by attaching a metal foil to the insulating layer 2.
  • the fourth strain gauge r4 may be an independent element mounted on the insulating layer 2. In any case, the entire surface of the fourth strain gauge r4 is fixed to the strain generating body 1 so as to be distorted according to the strain of the insulating layer 2.
  • the strain generating body 1 when a load is applied to the strain generating body 1, the strain generating body 1 is strained according to the load, the strain generating body 1 and the insulating layer 2 are strained, and the insulating layer 2 and the fourth strain gauge r4 are strained.
  • the resistance value of each fourth strain gauge r4 changes according to the strain, and the resistance value of the fourth resistance portion R4 changes according to the change of the resistance value of each fourth strain gauge r4.
  • the output voltage V2 changes according to the load.
  • the fourth strain gauges r4 are arranged at equal intervals (every 90 °) on the circumference of the fourth circle with the center of the strain body 1 as the center.
  • the fourth circle is a concentric circle of the third circle smaller than the third circle.
  • the outer peripheral portion of the first portion 11 is fixed, when a load is applied to the strain generating body 1, the central portion side and the outer peripheral portion side of the first portion 11 are distorted in opposite directions.
  • the resistance value of the gauge r4 changes in the opposite direction. That is, when a load is applied to the strain generating body 1, the resistance value of the third resistance portion R3 and the resistance value of the fourth resistance portion R4 change in opposite directions.
  • the third resistor portion R3 and the fourth resistor portion R4 constitute a half-bridge circuit, and the voltage between the third resistor portion R3 and the fourth resistor portion R4 is output as the output voltage V2, thereby increasing the load.
  • the corresponding change in the output voltage V2 can be amplified.
  • the 4th resistance part R4 should just be equipped with several 4th strain gauge r4, and the number is not restricted to four. In any case, it is preferable that the fourth strain gauges r4 are arranged at equal intervals on the circumference of the second circle. However, the fourth strain gauges r4 may not be arranged at equal intervals.
  • each fourth strain gauge r4 is preferably arranged between the third circle and the center of the fourth circle and each third strain gauge r3. That is, each fourth strain gauge r4 is preferably arranged on a line segment connecting the third circle and the center of the fourth circle and each third strain gauge r3.
  • the second strain gauges r2 and the fourth strain gauges r4 are alternately arranged at equal intervals (every 45 °). Thereby, the difference
  • the second circle and the fourth circle are preferably the same. That is, it is preferable that the second strain gauge r2 and the fourth strain gauge r4 are arranged on the same circumference. Thereby, the change of the resistance value of 2nd resistance part R2 according to a load and the change of the resistance value of 4th resistance part R4 can be equalize
  • the plurality of first gauge elements r1 are arranged at equal intervals on the circumference of the first circle.
  • the load sensor 100 can accurately detect the load based on the output voltages V1 and V2 even when the direction of the load is inclined with respect to the strain body 1.
  • the influence of the position shift of the first gauge elements r1 is affected by the plurality of first gauge elements r1. Is offset between. The same applies to the second resistor portion R2, the third resistor portion R3, and the fourth resistor portion R4. Therefore, even if the load sensor 100 is misaligned in the first gauge element r1, the second gauge element r2, the third gauge element r3, and the fourth gauge element r4 due to a manufacturing error, the output voltage V1, Based on V2, the load can be detected with high accuracy.
  • the load sensor 100 can accurately detect the load based on the output voltage V1.
  • first portion 11 of the strain body 1 may be oval.
  • first circle, the second circle, the third circle, and the fourth circle are concentric ellipses centered on the center of the first portion 11 (load receiving portion 14), which is similar to the first portion 11. It is preferable.
  • the load detection device according to the present embodiment can be any device including the load sensor 100.
  • the load detection device is, for example, a chair, a bed, a table, or a stretcher, but is not limited thereto.
  • a case where the load detection device is a bed will be described as an example.
  • FIG. 4 is a diagram illustrating an example of the bed 200 according to the present embodiment.
  • the bed 200 in FIG. 4 includes a top plate 4 and four legs 5.
  • the top plate 4 is a part for a person to lie down, and is composed of a frame and a floor plate.
  • the bed 200 is laid with a mattress or the like on the top 4 in use.
  • the leg part 5 supports the top plate 4 horizontally.
  • FIG. 5 is a partially enlarged view showing an example of the leg portion 5 of FIG. 6 is a cross-sectional view of the leg 5 of FIG.
  • the leg portion 5 is disposed between the first support portion 51 that supports the top plate 4, the second support portion 52 that supports the first support portion 51, and the first support portion 51 and the second support portion 52.
  • Load sensor 100 The 1st support part 51 has the recessed part 511 which accommodates the screw 15 of the load sensor 100 in a lower end.
  • the second support part 52 includes a housing 53, a caster 54, and a pressing part 55.
  • the housing 53 is a cylindrical member that connects the first support portion 51 and the casters 54, and has a hollow portion 531.
  • the upper end of the casing 53 is fixed to the lower ends of the load sensor 100 and the first support portion 51, and the lower end of the casing 53 is fixed to the upper end of the casters 54.
  • the load receiving portion 14 of the load sensor 100 is accommodated in the hollow portion 531 of the housing 53.
  • the caster 54 includes a wheel that can rotate about a horizontal axis, and a universal bracket that supports the wheel to rotate about a vertical axis.
  • the bed 200 can be easily moved by the casters 54.
  • the pressing portion 55 is a rod-like member extending upward from the upper end of the caster 54 and is housed in the hollow portion 531 of the housing 53.
  • the pressing portion 55 is designed to have a height at which the upper end of the pressing portion 55 can press the load receiving portion 14 when a load is applied to the bed 200.
  • the load sensor 100 when a person is on the bed 200, the load sensor 100 is pushed down by the first support portion 51, and the load receiving portion 14 is pressed from below by the pressing portion 55. Thereby, since the load according to a person's weight is added to the load receiving part 14, the load sensor 100 can detect a person's weight (load).

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Force In General (AREA)

Abstract

L'invention concerne un capteur de charge qui, selon un mode de réalisation, est pourvu : d'un corps de contrainte pourvu d'une partie de réception de charge ; d'une couche isolante disposée sur le corps de contrainte ; d'une première partie résistance et d'une seconde partie résistance qui sont disposées sur la couche isolante et connectées en série ; et d'une première borne de sortie qui délivre une tension entre la première partie résistance et la seconde partie résistance ; la première partie résistance étant pourvue d'une pluralité de premières jauges de contrainte connectées en série et agencées sur la circonférence d'un premier cercle qui est un cercle ou une ellipse ; la seconde partie résistance étant pourvue d'une pluralité de secondes jauges de contrainte connectées en série et agencées sur la circonférence d'un second cercle qui est un cercle ou une ellipse ; et le premier cercle et le second cercle étant des cercles concentriques ou des ellipses concentriques centrées sur la partie de réception de charge.
PCT/JP2018/045258 2018-02-15 2018-12-10 Capteur de charge et dispositif de détection de charge WO2019159512A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020500297A JPWO2019159512A1 (ja) 2018-02-15 2018-12-10 荷重センサ及び荷重検出装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018024953 2018-02-15
JP2018-024953 2018-02-15

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WO2019159512A1 true WO2019159512A1 (fr) 2019-08-22

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63302333A (ja) * 1987-06-02 1988-12-09 Komatsu Ltd ピン型ロ−ドセル
JP2009020096A (ja) * 2007-06-14 2009-01-29 Panasonic Corp 歪検出装置
US20110067502A1 (en) * 2008-05-29 2011-03-24 Weigh Point Incorporated Load-Cell System
US8256306B1 (en) * 2009-09-02 2012-09-04 The Boeing Company High-capacity low-profile load cell for measuring compression force
WO2013108502A1 (fr) * 2012-01-20 2013-07-25 昭和電工株式会社 Lit avec fonction de détection de charge, et détecteur de charge pour lit
JP2013217815A (ja) * 2012-04-11 2013-10-24 Yamato Scale Co Ltd ロードセル
JP2013250161A (ja) * 2012-05-31 2013-12-12 Aisin Seiki Co Ltd 荷重検出装置
JP2017211297A (ja) * 2016-05-26 2017-11-30 アイシン精機株式会社 荷重検出装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63302333A (ja) * 1987-06-02 1988-12-09 Komatsu Ltd ピン型ロ−ドセル
JP2009020096A (ja) * 2007-06-14 2009-01-29 Panasonic Corp 歪検出装置
US20110067502A1 (en) * 2008-05-29 2011-03-24 Weigh Point Incorporated Load-Cell System
US8256306B1 (en) * 2009-09-02 2012-09-04 The Boeing Company High-capacity low-profile load cell for measuring compression force
WO2013108502A1 (fr) * 2012-01-20 2013-07-25 昭和電工株式会社 Lit avec fonction de détection de charge, et détecteur de charge pour lit
JP2013217815A (ja) * 2012-04-11 2013-10-24 Yamato Scale Co Ltd ロードセル
JP2013250161A (ja) * 2012-05-31 2013-12-12 Aisin Seiki Co Ltd 荷重検出装置
JP2017211297A (ja) * 2016-05-26 2017-11-30 アイシン精機株式会社 荷重検出装置

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