JP2020030099A - Manufacturing method of capacitance weight sensor and capacitance weight sensor using the method - Google Patents

Abstract

To provide a capacitance weight sensor capable of precisely detecting weighting regardless of the position of the weighting (weight, pressure) applied to a sensor mat.SOLUTION: A capacitance weight sensor includes: a panel electrode S in which a resin plate made of an elastic material is covered with a conductor and the conductor is covered with a dielectric sheet; a panel electrode E in which a resin plate made of an elastic material is covered with a conductor and the conductor is covered with a dielectric sheet; and a frame spacer of an elastic body disposed in the entire periphery of a gap of outer edges of the panel electrode S and the panel electrode E. In the capacitance weight sensor, at least one of the panel electrode S and the panel electrode E stuck to the frame spacer is extended in a drum-paneled state.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a capacitance-type weight sensor that can measure the weight of a capacitance-type weight sensor (sensor mat) with high accuracy, and a capacitance-type weight distribution sensor.

As a capacitance-type weight sensor in which a bipolar electrode is composed of a plurality of strip-shaped electrodes, and a dielectric sheet and a plurality of spacers are provided between the electrodes to provide a pair of capacitor electrodes, There is a technique described in Patent Document 2. In the capacitance-type weight sensor described in Patent Document 1, a spacer is attached between two upper and lower insulators (a hard vinyl chloride plate) constituting an electrode, and the weight change applied to the capacitor electrode other than the spacer is measured. This is a sensor mat that detects a change in capacitance between capacitor electrodes.

  However, the capacitance-type weight sensor described in Patent Document 1 has a small change in the capacitance between the capacitor electrodes even if an attempt is made to detect a minute change in the load because the mounting portion of the spacer does not change. There is a problem that can not be.

In addition, in detecting the weight (weight) applied to the sensor mat, a uniform value must be detected regardless of the position on the sensor mat where the weight (weight) is applied. Since the portion does not fluctuate, the detected value is different between a case where a weight (weight) is applied to the spacer and the periphery thereof and a case where a weight (weight) is applied to other places. This becomes more conspicuous as the weight becomes lighter. In the technology described in Patent Document 1, if the position of the weight (weight, pressure) applied to the sensor mat is different, the detected value of the weight is different (the detected value varies). There is a problem.

  Patent Literature 2 discloses that a plurality of panel electrodes S having both sides covered with a dielectric sheet are sandwiched between the panel electrodes S so as to be able to detect a minute change in load with high accuracy, and the panel electrodes S are in contact with the panel electrodes S on both sides thereof. A technology relating to a capacitance type weight sensor in which a pair of panel electrodes E to which an elastic spacer is attached is disposed is disclosed.

  Patent Document 2 discloses that a panel electrode E is provided vertically above and below a panel electrode S, and two capacitors are formed vertically above and below the panel electrode S, thereby providing a more sensitive electrostatic capacitance than a single capacitor. The technology of the mold weight sensor is disclosed.

  However, also in the technique described in Patent Document 2, similarly to the technique described in Patent Document 1, a plurality of spacers are provided at regular intervals between the panel electrode S and the panel electrode E. For this reason, when the weight is applied to the spacer and its surroundings, and when the other parts are weighted, the detection value is different, and there is a problem that the lighter the weight is, the more noticeable the value becomes. Similarly to the technology described in Patent Literature 1, the technology described in Patent Literature 2 has a problem that if the weight applied to the sensor mat is different, the detected value of the weight is different (the detected value varies).

Patent No. 4069256 JP 2014-170462 A

  Therefore, an object of the present invention has been made in view of such circumstances, and an object of the present invention is to provide a capacitive weight sensor capable of detecting a load with high accuracy regardless of the position of the load (weight) applied to the sensor mat. As an issue. It is another object of the present invention to provide a capacitive weight distribution sensor capable of detecting the distribution of weight (weight) applied to a sensor mat with high accuracy.

A first aspect of the present invention for solving the above-mentioned problem is that a resin plate made of an elastic material is covered with a conductor, and the conductor is covered with a dielectric sheet. A panel electrode E covering the body and covering the conductor with a dielectric sheet, and an elastic frame spacer disposed all around the gap between the outer edges of the panel electrode S and the panel electrode E. In a capacitive weight sensor,
At least one of the panel electrode S or the panel electrode E fixed to the frame spacer is stretched in a taiko state, and is a capacitance-type weight sensor. It is preferable that a predetermined gap is provided between the end of the conductor and the frame spacer.

A second aspect of the present invention for solving the above-mentioned problem is a panel including a plurality of strip-shaped conductors formed at predetermined intervals on a resin plate made of an elastic material, and a dielectric seal covering a surface of the conductor. An electrode S;
A panel electrode E including a plurality of strip-shaped conductors formed at predetermined intervals on a resin plate made of an elastic material so as to intersect with the conductors of the panel electrode S, and a dielectric seal covering the surface of the conductor. When,
An elastic frame spacer disposed on the entire periphery of the gap between the outer edges of the panel electrode S and the panel electrode E;
At least one of the panel electrode S or the panel electrode E fixed to the frame spacer is stretched in a taut state and is a capacitance type weight distribution sensor. It is preferable that a predetermined gap is provided between the end of the conductor and the frame spacer.

A third aspect of the present invention for solving the above-mentioned problem is to cover a resin plate made of an elastic material with a conductor, cover the conductor with a dielectric sheet and form a panel electrode S,
A conductor is coated on a resin plate made of an elastic material, and the conductor is covered with a dielectric sheet to form a panel electrode E;
In a state where the panel electrode S and / or the panel electrode E is pulled by a predetermined tension, an elastic frame spacer is arranged and fixed all around the gap between the outer edges of the panel electrode S and the panel electrode E,
After the panel electrode S and / or the panel electrode E are fixed to the frame spacer, the pulling tension is released, and the panel electrode S and / or the panel electrode E is set to a taut state. This is a method for manufacturing a capacitance type weight sensor.

A fourth aspect of the present invention for solving the above problems is that a plurality of strip-shaped conductors are formed at predetermined intervals on a resin plate made of an elastic material, and the surface of the conductor is covered with a dielectric seal to cover a panel electrode S. Forming
A plurality of strip-shaped conductors are formed at predetermined intervals on a resin plate made of an elastic material so as to intersect with the conductors of the panel electrode S, and the surface of the conductor is covered with a dielectric seal to form a panel electrode E. ,
In a state where the panel electrode S and / or the panel electrode E is pulled by a predetermined tension, an elastic frame spacer disposed around the entire gap between the outer edges of the panel electrode S and the panel electrode E is arranged and fixed,
After the panel electrode S and / or the panel electrode E are fixed to the frame spacer, the pulling tension is released, and the panel electrode S and / or the panel electrode E is set to a taut state. A method of manufacturing a capacitance type weight distribution sensor characterized by the following.

 According to the present invention, it is possible to provide a capacitance-type weight sensor capable of measuring the weight (weight) uniformly and with high accuracy regardless of where the weight (weight) is applied to the sensor mat. Further, it is possible to provide a capacitance type weight distribution sensor capable of detecting the distribution of the weight (weight) applied to the sensor mat with high accuracy.

FIG. 1 is a plan view of a capacitance type weight sensor 10 according to an embodiment of the present invention. FIG. 1 is a sectional view of a capacitance type weight sensor 10 according to an embodiment of the present invention. It is sectional drawing which comprises the conductor (electrode E) and the conductor (electrode S) of the capacitance-type weight sensor which is one Embodiment of this invention. It is sectional drawing which comprises the conductor (electrode E) and the conductor (electrode S) of the capacitance-type weight sensor which is one Embodiment of this invention. FIG. 3 is a cross-sectional view of a gap between a frame spacer and a conductor of the capacitive weight sensor according to the embodiment of the present invention. FIG. 3 is a plan view of the tension adjusting device 300. It is the figure which showed a mode that the edge part of a panel electrode was pulled with a tension adjustment tool and tension was given to the panel electrode. It is a figure which shows the process which arrange | positions and fixes a frame spacer to the panel electrode which gave tension, and produces a capacitance-type weight sensor. FIG. 4 is a diagram for convenience illustrating the function when the electrode panel of the capacitance-type weight sensor 10 is in a taiko state. FIG. 3 is a cross-sectional view and measurement data of a capacitance type weight sensor according to an embodiment of the present invention in which there is no gap (0 mm) between a panel electrode and a frame spacer. FIG. 3 is a cross-sectional view and measurement data of a gap (5 mm) between a panel electrode and a frame spacer of a capacitive weight sensor according to an embodiment of the present invention. FIG. 3 is a cross-sectional view and measurement data of a gap (10 mm) between a panel electrode and a frame spacer of a capacitive weight sensor according to an embodiment of the present invention. 5 is measurement data of the capacitive weight sensor 10 according to an embodiment of the present invention when no load is applied. 5 is measurement data of the capacitive weight sensor 10 according to an embodiment of the present invention when no load is applied. FIG. 1 is a plan view of a capacitive weight distribution sensor 100 according to an embodiment of the present invention. FIG. 1 is a cross-sectional view of a capacitance type weight distribution sensor 100 according to an embodiment of the present invention.

  An embodiment of the present invention will be described with reference to the drawings, but the present invention is not limited thereto. FIG. 1 is a plan view of a capacitance type weight sensor 10 according to an embodiment of the present invention, and FIG. 2 is a sectional view thereof.

The capacitance-type weight sensor 10 includes a panel electrode S (see FIG. 2: lower electrode) including an insulator 14, a conductor 24 coated on an upper surface thereof, and a dielectric sheet 16 coated on an upper outer surface thereof. A panel electrode E (see FIG. 2: upper electrode), a panel electrode S, and a panel electrode, each of which includes an insulator 14, a conductor 22 coated on a lower surface thereof, and a dielectric sheet 16 coated on a lower outer surface thereof. A frame spacer 18 is attached (fixed) to a gap around the entire outer edge of the frame E and an outer cover 12 that covers them.

  In FIG. 2, a dielectric sheet 16, a conductor 24, and a conductor 22 are coated on an insulator 14 constituting the panel electrode S and the panel electrode E. There is a gap 2 between the panel electrode S and the panel electrode E. The conductors 22 and 24 are preferably flexible conductors that expand and contract when a load (gravity, pressure) is applied, for example, an aluminum foil laminated film. The panel electrode S and the panel electrode E are led out to the outside by lead wires 26-E and 26-S, respectively. The outlet is fixed by welding or an adhesive or the like, and the outer periphery thereof is sealed with a waterproof tape 32.

  FIG. 3 is a diagram showing a cross section of a panel electrode S and a panel electrode E according to a first embodiment of the present invention. In FIG. 3, the panel electrode S is formed of an insulator 14, a conductor 24 covering the upper surface thereof, and a dielectric sheet 16 covering the upper outer surface thereof. The panel electrode E, like the panel electrode S, is formed of a conductor 22 coated on the upper outer surface of the insulator 14 and a dielectric sheet 16 coated on the lower outer surface thereof. That is, the panel electrode S and the panel electrode E in the first embodiment have a vertically symmetric configuration.

  FIG. 4 is a diagram showing a cross section of a panel electrode S and a panel electrode E according to a second embodiment of the present invention. The configuration of the panel electrode S in the second embodiment is the same as that of the panel electrode S in the first embodiment. On the other hand, the panel electrode E is composed of the insulator 14 and the conductor 22 coated on the lower surface thereof, and the dielectric sheet 16 is not covered. By using such an electrode panel E, a capacitance type weight sensor with higher sensitivity can be provided as compared with the first embodiment. On the other hand, on the other hand, there is a disadvantage that the stability is lower than that of the first embodiment, and details thereof will be described later with reference to FIGS.

  FIG. 5 shows a frame electrode 18 provided around the outer periphery of the insulator 14, a conductor 24 formed at a position separated from the frame spacer 18 by a predetermined gap 30, and a panel electrode S formed by the dielectric sheet 16. FIG. 2 is a cross-sectional view and a diagram showing a cross section of a panel electrode E arranged to face the panel electrode S. The conductor 22 and the dielectric sheet 16 of the panel electrode E are also formed with a predetermined gap 30 from the frame spacer 18.

It is preferable to adjust the gap 30 to an appropriate gap from the relationship between the weight applied to the sensor mat and the width, thickness, and hardness of the frame spacer 18 and the thickness of the insulator 14.

  By changing the width of the gap, the capacitance and the sensitivity and accuracy at the time of detection can be changed. When the width of the gap is small, there is a disadvantage that the capacitance is large and the change value is small, and the detection accuracy with respect to the load is reduced. Further, the larger the width of the gap, the smaller the capacitance and the larger the change value, and the accuracy of detecting the load is improved. For this reason, it becomes easy to detect even a small weight with high accuracy, but on the other hand, it takes time until the detection value becomes stable after the weight. In addition, there is a demerit that it takes time to return to the original state after removing the weight. These advantages and disadvantages can be solved by appropriately selecting the thickness and hardness of the insulator and the spacer material. By setting the gap 30 to an appropriate width, the accuracy and sensitivity of the detection value can be improved, but the details will be described later. The material of the frame spacer 18 is preferably a material having a large expansion and contraction and a small compression set, such as urethane foam, an elastomer, and silicone rubber.

6 to 9 show a tension adjusting device 300 for tensioning the panel electrode S and / or the panel electrode E of the capacitive weight sensor 10 which is a feature of the present invention, and a manufacturing process thereof. FIG. As shown in FIG. 6, the tension adjusting device 300 includes a fixing portion 44 that sandwiches the insulator 14 of the panel electrode at both ends, a tension adjusting bolt 38, a tension adjusting plate 42, and a tension adjusting nut 40. The end of the insulator 14 is clamped and fixed by the tension adjusting device 300 using the tightening bolt 45, and the panel electrode is given tension by the tension adjusting bolt or the like.

  A conductor 22 is coated on the insulator 14, and a dielectric sheet 16 is coated thereon. As shown in FIG. 7, the end of the panel electrode is pulled by the tension adjusting bolt 38 with a predetermined tension to bring the panel electrode into tension.

Under a predetermined tension, the frame spacer 18 is arranged and fixed all around the gap between the outer edges of the panel electrodes S and E (FIG. 8A). After the panel electrode S and the panel electrode E are completely fixed to the frame spacer 18, the tension adjusting bolt 38 is loosened to release the tension applied to the panel electrode (FIG. 8B).

  FIG. 9 is a diagram for convenience explaining the function of the capacitance-type weight sensor 10 created by the above-described method. When the tension applied to the panel electrode is released, the panel electrode tries to return to its original state (shrinks). However, the entire periphery of the panel electrode is fixed by the frame spacer, so that the tensioned panel electrode is in a taut state as shown in FIG.

  When a weight is applied to the vicinity of the center (position C) of the panel electrode S and the panel electrode E stretched in the taut state in this manner, the downward displacement is larger than that around the frame spacer 18. On the other hand, when a load is applied near the frame spacer 18 (positions A and B), the displacement is smaller than that near the center (position C). Here, since the panel electrodes are in a taiko state, the vicinity of the center thereof is largely curved upward, and the curvature near the frame spacer 18 is slight. For this reason, the distance between the panel electrodes that determines the capacitance value is substantially constant regardless of the location (position) where the load is applied. As a result, a uniform detected value can be obtained regardless of the position of the weight applied to the sensor mat. That is, no matter where the weight is applied, the distance between the S-pole and the E-pole becomes substantially constant, so that almost the same value can be obtained regardless of the position of the weight.

Next, regarding the separation between the frame spacer 18 and the conductor, when a weight is applied to the vicinity of the frame spacer 18, the downward displacement is suppressed due to the influence of the frame spacer, which prevents uniform detection values. become. However, it has been found that such a problem can be solved by providing the gap 30 between the frame spacer and the ends of the conductor 22 and the dielectric sheet 16. As will be described in detail later, it has been found that by adjusting the width of the gap 30, a highly sensitive sensor mat can be provided according to the magnitude of the weight to be detected and the purpose of use.

(Verification experiment)
Next, a verification experiment was performed on the variation in the detection value due to the difference in the location (position) of the weight applied to the capacitance type weight sensor (sensor mat) and the gap 30 between the frame spacer 18 and the conductor. The capacitance type weight sensor used in the experiment was used for a total of three types, that is, the gap 30 shown in FIG. 10 having a gap of 0 mm, the gap 30 shown in FIG. 11 having a gap of 5 mm, and the gap 30 shown in FIG. Was. A 50 mm (w) x 50 mm (l) x 25 mm (t) iron plate was loaded with a 30 mm (h) x 26 φ iron cylinder (weight 545 g) on each block ((1) to (4)). And measured at 300 msec.

FIG. 10A is a diagram showing a cross section of the capacitance type weight sensor 10. As shown in FIG. 10, the capacitance-type weight sensor 10 has no gap between the frame spacer 18 and the ends of the panel electrodes S and E. FIG. 10B is a plan view of the capacitance type weight sensor, and each block ((1) to (4)) indicates a location of the weight applied to the sensor. (1) to (4) of FIG. 10C correspond to the blocks ((1) to (4)) shown in FIG. 10B and are graphs of the detection values of the capacitance type weight sensor 10. Things. The horizontal axis is the time axis, and the vertical axis is the capacitance value (pf).

  As shown in FIG. 10 (c), the maximum output value was obtained when the location of the block (2) (initial value: 127.14 pf) was weighted, and the output value at that time was 155.39 pf. The minimum output value was obtained when the weight of the place of the block (4) (the initial value was 127.30 pf) was weighted, and the value at that time was 150.74 pf. The output value of block (1) (initial value 127.00pf) was 153.41pf, and the output value of block (3) (initial value 127.29pf) was 154.09pf. From these results, the range of the change value was 155.39 pf-150.70 pf = 4.65 pf. Further, since the average output value when weighting the blocks (1) to (4) is 153.39 pf, the variation rate depending on the place (block) where the weight is applied is 3.03% (4.65 pf / 153.39 pf). = 0.0303).

FIG. 11A is a diagram showing a cross section of the capacitance type weight sensor 10. In this capacitance type weight sensor 10, the frame spacer 18 is separated from the end portions of the panel electrodes S and E as shown in FIG. 11A, and the gap 30 is 5 mm. FIG. 11B is a plan view of the capacitance-type weight sensor, and each block ((1) to (4)) indicates a location of the weight applied to the sensor. 11 (c) correspond to the blocks ((1) to (4)) shown in FIG. 11 (b), and the detection values of the capacitance type weight sensor 10 are graphed. Things. The horizontal axis is the time axis, and the vertical axis is the capacitance value (pf).

As shown in FIG. 11 (c), the maximum output value was obtained when the location of the block (2) (initial value: 122.05pf) was weighted, and the output value at that time was 172.53pf. The minimum output value was obtained when the weight of the block (1) (initial value: 121.83 pf) was weighted, and the value at that time was 168.74 pf. The output value of block (3) (initial value 122.06pf) was 170.94pf, and the output value of block (4) (initial value 122.25) was 169.28pf. From these results, the range of the change value was 172.53pf-168.74pf = 3.79pf. Further, since the average output value when weighting is applied to blocks (1) to (4) is 170.37 pf, the variation rate due to the difference in the location (block) where weight is applied is 2.22% (3.79 pf / 170.37pf = 0.0222).

FIG. 12A is a diagram showing a cross section of the capacitance type weight sensor 10. This capacitance type weight sensor is composed of a frame spacer 18, a panel electrode S and a panel electrode E as shown in FIG. 12, and a gap 30 between the frame spacer 18 and an end of each panel electrode is 10 mm. FIG. 12B is a plan view of this capacitance type weight sensor, and each block ((1) to (4)) shows a location of the weight applied to the sensor. 10 (c) correspond to the blocks ((1) to (4)) shown in FIG. 7 (b), and the detection values of the capacitance type weight sensor 10 are graphed. Things. The horizontal axis is the time axis, and the vertical axis is the capacitance value (pf).

As shown in FIG. 12C, the maximum output value was obtained when the location of the block (3) (initial value: 116.89 pf) was weighted, and the output value at that time was 184.90 pf. In addition, the minimum output value was obtained when weighting the place of block (4) (initial value: 116.96 pf), and the value at that time was 182.70 pf. The output value of block (1) (initial value 116.59pf) was 183.20pf, and the output value of block (2) (initial value 116.79) was 183.00pf. From these results, the difference between the change values was 184.90 pf−182.70 pf = 2.2 pf. Further, since the average output value when the weights of the blocks (1) to (4) are applied is 183.45 pf, the variation rate due to the difference in the place (block) to which the weight is applied is 1.19% (2.2 pf / 183.45pf = 0.01199). From the above, it has been found that by increasing the gap 30, the fluctuation rate (difference) of the detected value due to the difference in the place (block) to which the weight is applied can be reduced.

FIG. 13 is a graph showing measurement data of the capacitive weight sensor in which the dielectric sheet 16 is coated only on the panel electrode E in an unloaded state. Although such a graph shows the stability of the capacitive weight sensor, the maximum width of the output value in the unweighted state, since the maximum output value is 115.40pf and the minimum output value is 115.00pf, The fluctuation is 115.40pf-115.00pf = 0.40pf.

FIG. 14 is a graph showing a change in measured data of the capacitive weight sensor in which the dielectric sheet 16 is coated on both the panel electrodes S and E in an unloaded state. Such a graph shows the stability of the capacitive weight sensor. As for the maximum width of the output value in the unweighted state, the maximum output value is 120.45 pf and the minimum output value is 120.14 pf, so that the variation is 120.45 pf−120.14 pf = 0.331. From these results, it was found that covering the panel electrodes S and E with the dielectric sheet 16 is more stable.

As described above, the variation rate of the weight applied to the capacitance type weight sensor depending on the place can be adjusted by the gap 30. That is, by changing the width of the gap 30 to 0 mm, 5 mm, and 10 mm, it is possible to create a capacitance-type weight sensor that does not depend on the location where the load is applied. In order to reduce the fluctuation of the output value in the unweighted state, it is preferable that both the panel electrodes S and E are covered with a dielectric sheet.

In this verification experiment, a polyester turboline sheet (0.35 to 0.7 mm), which can be bent and stretched (has flexibility) and has good heat resistance, airtightness, and weldability, is used as the material of the outer cover 12. Was.

As a material of the insulator 14, a polycarbonate sheet (0.3 to 3 mm) which is excellent in impact resistance, heat resistance, weather resistance, bending resilience, and the like, and has good welding was used. Note that a polycarbonate sheet plate may be used depending on the sensor configuration. As a material for the dielectric sheet 16, a urethane sheet (0.05 to 0.2 mm) having a large restoring force against refraction was used.

It is preferable that the material of the frame spacer 18 is changed according to the magnitude of the load applied to the sensor by changing the thickness, width and hardness of the frame spacer 18. For example, urethane foam, elastomer, silicone rubber, etc. (thickness: 0.8 to 2.0 mm, hardness: 200 to 480 kg / m ³ ) with high shrinkage and low compression set are appropriately selected according to the applied load and the like. It is preferable to use them.

According to the capacitance-type weight sensor 10 according to the embodiment of the present invention, by changing the separation of the gap 30, a capacitance-type weight sensor that can support various specifications can be obtained. Also, by changing the specifications such as the width and thickness of the frame spacer 18 and the compression residual strain% (hardness), the change in capacitance and the capacity can be changed, and by changing the hardness of the frame spacer 18, a small load can be obtained. Therefore, it is possible to obtain a sensor capable of detecting a large weight.

FIG. 15 is a plan view of the capacitance-type weight distribution sensor 100 capable of detecting the weight distribution applied to the sensor mat. The capacitance-type weight distribution sensor 100 includes a panel electrode S formed by forming a plurality of conductive strip-shaped detection electrodes 220 on an insulator 140, and crosses the detection electrodes 220 of the panel electrode S (in a matrix). ), And a panel electrode E having a plurality of conductive strip-shaped detection electrodes 220 formed on an insulator 140. Each strip electrode is led out by a lead wire 260-S, 260-E.
The dielectric 160 is formed integrally with the detection electrode 220 on the surface of the belt-like detection electrode 220. Each intersection position between the band-shaped electrode S and the band-shaped electrode E serves as a capacitance type weight sensor, and by detecting the weight there, it is possible to detect the weight distribution applied to the entire sensor mat.

 FIG. 16 is a sectional view of the capacitance-type weight distribution sensor 100. In FIG. 16, a panel electrode S (lower side) has a plurality of conductive strip-shaped detection electrodes 220 formed integrally with a dielectric sheet 160 formed on an insulator 140. On the panel electrode E (upper side), a plurality of conductive strip-shaped detection electrodes 240 integrally formed with the dielectric sheet 160 are formed on the insulator 140. A frame spacer 180 is provided between the panel electrode S and the panel electrode E, and the entire outer periphery is closed by an outer cover 120. There is a gap 300 between the frame spacer 180 and the ends of the panel electrodes S and E. By deriving the lead wire 260-S and the lead wire 260-E from the detection electrode 220, the detection electrode 240, and the end of each detection electrode, the weight applied to the intersection of the panel electrodes can be selectively set for each intersection position. By measuring, the weight distribution on the sensor mat can be measured.

10 Capacitive weight sensor 12 Exterior cover (insulator)
DESCRIPTION OF SYMBOLS 14 Insulator 16 Dielectric sheet 18 Frame spacer 20 Air layer 22, 24 Conductor 26 Lead wire 28 Joining part 30 Gap layer 32 between panel electrode and spacer 32 Waterproof tape 38 Tension adjusting bolt 44 Fixed part 100 Capacitive type weight distribution Sensor 140 Insulator 160 Dielectric sheet 180 Frame spacer 220 240 Detection electrode 260 Lead wire 300 Tension adjusting device

Claims (6)

A panel electrode S in which a resin plate made of an elastic material is covered with a conductor and the conductor is covered with a dielectric sheet, and a conductor is covered in a resin plate made of an elastic material and the conductor is covered with a dielectric sheet A capacitive electrode comprising: a panel electrode E; and an elastic frame spacer disposed around the entire gap between the outer edges of the panel electrode S and the panel electrode E.
A capacitance type weight sensor, wherein at least one of the panel electrode S and the panel electrode E fixed to the frame spacer is stretched in a taiko state.   The capacitance type weight sensor according to claim 1, wherein a predetermined gap is provided between an end of the conductor and the frame spacer. A plurality of strip-shaped conductors formed at predetermined intervals on a resin plate made of an elastic material, and a panel electrode S including a dielectric seal covering a surface of the conductor;
A panel electrode E including a plurality of strip-shaped conductors formed at predetermined intervals on a resin plate made of an elastic material so as to intersect with the conductors of the panel electrode S, and a dielectric seal covering the surface of the conductor. When,
An elastic frame spacer disposed on the entire periphery of the gap between the outer edges of the panel electrode S and the panel electrode E;
A capacitive weight distribution sensor, wherein at least one of the panel electrode S and the panel electrode E fixed to the frame spacer is stretched in a taut state. The capacitance type weight distribution sensor according to claim 3, wherein a predetermined gap is provided between an end of the conductor and the frame spacer. A conductor is coated on a resin plate made of an elastic material, and the conductor is covered with a dielectric sheet to form a panel electrode S,
A conductor is coated on a resin plate made of an elastic material, and the conductor is covered with a dielectric sheet to form a panel electrode E;
In a state where the panel electrode S and / or the panel electrode E is pulled by a predetermined tension, an elastic frame spacer is arranged and fixed all around the gap between the outer edges of the panel electrode S and the panel electrode E,
After the panel electrode S and / or the panel electrode E are fixed to the frame spacer, the pulling tension is released, and the panel electrode S and / or the panel electrode E is set to a taut state. A method for manufacturing a capacitance-type weight sensor, comprising: A plurality of strip-shaped conductors are formed at predetermined intervals on a resin plate made of an elastic material, and the surface of the conductor is covered with a dielectric seal to form a panel electrode S;
A plurality of strip-shaped conductors are formed at predetermined intervals on a resin plate made of an elastic material so as to intersect with the conductors of the panel electrode S, and the surface of the conductor is covered with a dielectric seal to form a panel electrode E. ,
In a state where the panel electrode S and / or the panel electrode E is pulled by a predetermined tension, an elastic frame spacer disposed around the entire gap between the outer edges of the panel electrode S and the panel electrode E is arranged and fixed,
After the panel electrode S and / or the panel electrode E are fixed to the frame spacer, the pulling tension is released, and the panel electrode S and / or the panel electrode E is set to a taut state. For manufacturing capacitive weight distribution sensor characterized by the following:

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