JP6453036B2 - Pressure sensor and contact pressure measuring device - Google Patents

Description

  The present invention relates to a pressure sensor and a contact pressure measuring device used to detect a load (contact pressure) applied between a contacted body and a contacted body, for example, a weather strip provided on a door to a vehicle body. The present invention relates to a pressure-sensitive sensor and a contact pressure measuring device used for detecting a contact pressure.

In order to measure the contact pressure (adhesion degree) when the contact body is brought into contact with the contacted body, a pressure-sensitive sensor is used.
For example, Patent Document 1 discloses a capacitance change type sensor as a pressure-sensitive sensor for detecting a contact pressure between a door glass and a channel that guides the raising and lowering of the door glass.

As shown in FIG. 11, the sensor 50 has conductive strips (electrodes) 51 arranged one above the other. The surface of the conductive strip (electrode) 51 is covered with a resin coating (not shown), and a flexible material 52 is interposed between the conductive strips 51 to form a predetermined gap D. A capacitor is configured.
The sensor 50 is a so-called capacitance change type sensor that detects a change in capacitance due to deformation (due to a change in the gap D) in response to a pressure P applied to the surface of the sensor 50, and this capacitance. The pressure (contact pressure) is obtained from the change.

However, in the case of the capacitance change type sensor 50 disclosed in Patent Document 1, a gap D is formed between the upper and lower conductive strips (electrodes) 51, and it is necessary to detect a change in the gap D. is there.
Therefore, the sensor 50 has a problem that it is not suitable as a sensor for measuring a large contact pressure (a contact pressure at which the gap D disappears) such that the contact body is in pressure contact with the contacted body.

  As a sensor for solving this problem, there is a pressure-sensitive sensor 60 previously proposed by the present applicant. The pressure-sensitive sensor 60 is a sensor that detects the magnitude of the load based on a change in resistance value due to a change in the contact area between the electrode layer and the resistor layer.

As shown in FIG. 12, the pressure-sensitive sensor 60 has a first substrate 61, a second substrate 62, and the first substrate 61 and the second substrate 62 facing each other with a predetermined interval. A spacer 63 joined to the peripheral edge portions of both substrates is integrated.
An electrode layer 64 is formed on the first substrate 61, and a resistor layer 65 is formed on the second substrate 62 so as to face the electrode layer 64.

  This pressure-sensitive sensor 60 is a so-called resistance value change type sensor, and is deformed in response to the pressure P applied to the surface of the pressure-sensitive sensor 60, the contact area between the electrode layer 64 and the resistor layer 65 changes, and resistance A change in value occurs. The pressure sensor 60 obtains pressure (contact pressure) from the change in resistance value.

Japanese Patent No. 4994195 Japanese Patent No. 4528878

  As described above, in the pressure-sensitive sensor disclosed in Patent Document 2, the resistance value changes depending on the degree of contact between the electrode layer and the resistor layer, so that the contact body is in pressure contact with the contacted body. It can be used as a sensor for measuring such contact pressure.

  A case where a load (contact pressure) when the door 71 is closed is measured between the vehicle body 70 as a contact body and the door 71 as a contact body using the pressure sensor 60 is shown in FIG. 13 and FIG. Specifically, the case where the load (contact pressure) between the vehicle body 70 and the weather strip 72 provided on the periphery of the door 71 is measured will be described.

  First, the pressure-sensitive sensor 60 is attached to the vehicle body 70 side using an adhesive or the like. When the door 71 is closed, the weather strip 72 comes into contact with the vehicle body 70, that is, the pressure sensor 60, and this contact load (contact pressure) is applied to the pressure sensor 60. By this load, the second substrate 62 is deformed, the contact area between the electrode layer 64 and the resistor layer 65 is changed, and a change in resistance value is detected. And the magnitude | size of the load (contact pressure) which acts from the said resistance value is calculated | required.

By the way, the weather strip 72 is generally formed into a non-planar shape complicated by extrusion molding with a flexible rubber material or the like.
For this reason, there is a problem that the shape of the weather strip 72 is unstable, the deformation state of the weather strip 72 is difficult to predict, and the weather strip 72 is difficult to contact the central portion of the pressure-sensitive sensor 60. Further, the first substrate 61 and the second substrate 62 are bonded via a spacer 63.
As a result, the load applied to the second substrate 62 (by the weather strip 72) may cause the second substrate 62 to be difficult to be deformed properly with respect to the first substrate 61, and high-precision measurement may not be performed. was there.

  That is, when the pressure sensor is provided on the contacted body and the contact pressure is measured when the contacted body is brought into contact, the shape of the contacted surface of the contacted body and the contacted body is particularly a curved surface If the contact surface is flexible and the shape is unstable, the contact body will not easily contact the center of the pressure sensor and the measurement accuracy will decrease. was there.

  The present invention has been made in view of the above-described problems. The shape of the contacted body and the contact surface of the contact body is a non-planar shape such as a curved surface shape, or the contact surface is flexible. An object of the present invention is to provide a pressure-sensitive sensor and a contact pressure measuring device capable of measuring contact pressure with high accuracy even when the shape is unstable.

The pressure-sensitive sensor according to the present invention, which has been made to achieve the above object, is provided on the mutual contact surfaces of the contacted body and the contact body, and detects the contact pressure when the contact surface makes contact. And a first sensor structure having a conductive electrode layer formed on an insulating substrate disposed on one of the contact surfaces, and the first sensor structure. is separated from the body is formed separately, the are arranged on the other contact surface, and a second sensor structure in which the resistance layer is formed on an insulating substrate, a first sensor arrangement The first sensor component is disposed on the contacted member and the contact member that are movable by a hinge so that the body and the second sensor component are in contact with each other at a contact surface that is fixed to each other. At least one of the substrate of the second sensor and the substrate of the second sensor structure is flexible It has, and by a change of load applied between the first sensor structure and the second sensor structure, the contact area of the resistor layer and the electrode layer is changed, corresponding to the contact area It is characterized by detecting a resistance value.

Thus, the pressure-sensitive sensor according to the present invention separates the first sensor structure formed with the conductive electrode layer and the second sensor structure formed with the resistor layer. And configured to detect a change in resistance value in accordance with a change in contact area between the first sensor component and the second sensor component. In addition, at least one of the substrate of the first sensor component and the substrate of the second sensor component has flexibility.
That is, the spacer is not provided between the first sensor structure and the second sensor structure, unlike the conventional pressure sensor, and is formed separately. Further, the first sensor component and the second sensor component are deformed following the change in the shape of the contacted body and the contact surface of the contact body.

  As a result, even when the shape of the abutted body and the abutting surface of the abutting body is a non-planar shape such as a curved surface, or when the abutting surface is flexible and the shape is unstable, contact The pressure can be measured with high accuracy.

Here, in the second sensor structure, a concavo-convex layer is formed of an insulating resin containing non-conductive particles on the surface of the substrate, and a resistor layer containing carbon powder is laminated on the concavo-convex layer. It is desirable that
Thus, since the uneven layer is formed of the insulating resin containing non-conductive particles on the surface of the substrate of the second sensor structure, and the resistor layer is laminated on the uneven layer, The load state change (change in contact pressure) between the contacted body and the contacted body can be measured in a wider range.

The electrode layer in the first sensor structure is preferably formed of silver or a carbon material.
As described above, when the electrode layer is formed of a carbon material, the electrode layer can be formed at a low cost. On the other hand, when the electrode layer is formed of silver (Ag), the electrode layer is formed more than when the electrode layer is formed of a carbon material. The potential can be stabilized.

Further, it is desirable that a resistor layer divided into a plurality of parts is formed on the substrate of the second sensor structure.
As described above, since the resistor layer divided into a plurality of parts is formed on the substrate of the second sensor structure, the resistance value, that is, the contact pressure can be measured for each of the divided resistor layers. . Furthermore, the contact state change (change in contact pressure) between the contacted body and the contacted body can be measured for each smaller region.

A contact pressure measuring device according to the present invention, which has been made to achieve the above object, is a contact pressure measuring device provided on a contact surface of a contacted body and a contacted body that are opposed to the pressure-sensitive sensor. The first sensor component is provided on one of the contact surfaces, the second sensor component is provided on the other of the contact surfaces, and the first sensor component and the second sensor The first sensor component and the second sensor are disposed on the contacted body and the contact body that are movable by a hinge so that the structural bodies are in contact with each other on the contact surfaces determined by each other. The contact area between the resistor layer and the electrode layer changes due to a change in the load applied to the structure, and the resistance value is detected according to the contact area, whereby the first sensor structure and the second sensor structure are detected. It is possible to detect contact pressure applied between It is set to.

In this way, the first sensor component is provided on one of the contact surfaces, and the second sensor component is provided on the other of the contact surfaces, and the first sensor component and the second sensor The contact area between the resistance layer and the electrode layer changes due to a change in the load applied between the sensor structure and the first sensor structure and the first sensor structure by detecting a resistance value according to the contact area. The contact pressure applied between the two sensor components is detected.
Therefore, even when the shape of the abutted body and the abutting surface of the abutting body is a non-planar shape such as a curved surface, or when the abutting surface is flexible and the shape is unstable, the contact pressure Can be measured with high accuracy.

Here, it is preferable that at least one of the first sensor component and the second sensor component is deformed along the shape of the contact surface.
As described above, at least one of the first sensor component and the second sensor component has a flexible insulating substrate and is deformed along the shape of the contact surface. Therefore, the change in contact pressure can be measured with higher accuracy.

Further, it is desirable that one of the mutual contact surfaces is a vehicle body of the vehicle and the other is a weather strip provided on a door of the vehicle.
The abutted body and the abutting body are suitable for a vehicle body and a door (weather strip) of the vehicle, but the abutted body and the abutting body are not limited to these objects. .

  ADVANTAGE OF THE INVENTION According to this invention, the pressure sensor and contact pressure measuring device which can measure a contact pressure with high precision can be obtained.

It is sectional drawing which shows the pressure sensor which concerns on embodiment of this invention. It is sectional drawing which expands and shows the principal part of the same pressure sensor. It is a principal part expanded sectional view which shows the state when a load acts on the same pressure sensor. It is a principal part expanded sectional view which shows the state when a load further acts on the pressure sensor from the state shown in FIG. It is a graph which shows the result of having measured the change of the resistance value with respect to load change in the same pressure sensor. FIG. 15 is a cross-sectional view corresponding to FIG. 14. In the contact pressure measuring device concerning the embodiment of the present invention, it is a perspective view showing the shape of a pressure sensitive sensor in the state where the pressure sensitive sensor was stuck on the to-be-contacted body and the contacting body, and (a) is the 1st. (B) is a perspective view of a 2nd sensor structure. It is explanatory drawing which shows the load detection process by the contact pressure measuring device. It is a typical top view which shows the state which has arrange | positioned the pressure-sensitive sensor in the multiple places of the door of a vehicle. It is sectional drawing which shows the modification of a pressure sensor. It is sectional drawing which shows one conventional sensor. It is sectional drawing which shows the other conventional sensor. 1 is a schematic side view showing a vehicle. It is sectional drawing shown along the AA line in FIG.

  Hereinafter, a pressure-sensitive sensor and a contact pressure measuring device according to an embodiment of the present invention will be described with reference to FIGS. 1 is a cross-sectional view showing a pressure-sensitive sensor, and FIG. 2 is a cross-sectional view showing an enlarged main part of the pressure-sensitive sensor. FIG. 3 is an enlarged cross-sectional view showing a main part when a load is applied to the pressure sensor, and FIG. 4 shows a state when a load is further applied to the pressure sensor from the state shown in FIG. It is a principal part expanded sectional view. FIG. 5 shows a result of measuring a change in resistance value with respect to a load change in the pressure-sensitive sensor. In each drawing, the scale of each member may be appropriately changed in order to make each member a recognizable size.

As shown in FIGS. 1 and 2, the pressure sensor 1 includes a first sensor component 11 and a second sensor component 21. The first sensor structure 11 and the second sensor structure 21 are separated and configured separately.
In the pressure-sensitive sensor 1, the electrode layer 13 (13A, 13B) formed on the first sensor structure 11 described later and the resistor layer 24 formed on the second sensor structure 21 are in contact with each other. It is a sensor that detects the magnitude of a load based on a change in resistance value due to a change in contact area.

The first sensor structure 11 includes a substrate 12 and a pair of conductive electrode layers 13A and 13B (comb electrodes) formed on the substrate 12.
The board | substrate 12 is formed in the sheet form with the insulating material which has a softness | flexibility. For the substrate 12, for example, a sheet of synthetic resin having insulating properties such as polyethylene terephthalate resin, polyethylene naphthalate resin, polyimide resin, glass epoxy resin, or the like can be used.

In addition, the thickness of the first substrate 12 is not particularly limited, but the first substrate 12 is deformed along the shape of the contact surface when attached to the contacted body or the contact body. Is desirable. Specifically, the thickness t ₁ is desirably about 25 μm to 250 μm.
The pair of electrode layers 13A and 13B are made of silver (Ag) or copper (Cu), and the film thickness t5 is ₅ μm to 40 μm. When the electrode layers 13A and 13B are formed of silver (Ag), the potential can be stabilized.
Furthermore, the electrode layers 13A and 13B may be formed of a carbon material. Specifically, the carbon layer can be formed by printing using a carbon paste.

The second sensor configuration body 21 includes a second substrate 22 and an uneven layer 23 and a resistor layer 24 formed on the second substrate 22.
The 2nd board | substrate 22 is formed in the sheet form with the insulating material which has a softness | flexibility. The second substrate 22 is formed of a sheet of synthetic resin having insulation properties such as polyethylene terephthalate resin, polyethylene naphthalate resin, polyimide resin or the like.
The thickness of the second substrate 22 is not particularly limited, but the second substrate 22 is deformed along the shape of the contact surface when attached to the contacted body or the contact body. Is desirable. Specifically, a synthetic resin sheet having a thickness t2 of the _second substrate 22 of 25 μm to 250 μm is used.

On the surface of the second substrate 22, an uneven layer 23 containing non-conductive particles 23a in an insulating resin is formed.
Here, silicon dioxide particles will be described as an example of the non-conductive particles 23a with reference to FIG. The non-conductive particles are not limited to the silicon dioxide particles, and ceramic particles such as alumina particles and synthetic resin particles such as urethane beads can be suitably used.

The concavo-convex layer 23 contains 1% by weight to 20% by weight of silicon dioxide particles 23a having a particle diameter D of 30 μm to 100 μm in an insulating resin such as polyester resin, polyurethane resin, acrylic resin, epoxy resin, or the like. ing.
Then, the thickness _{t 3} of uneven layer 23 between the silicon dioxide particles 23a is formed in a 10 m to 30 m. That is, the thickness t ₃ of uneven layer 23 between the silicon dioxide particles 23a are formed smaller than the particle diameter D of silicon dioxide, (the convex portion of the concavo-convex layer 23) uneven layer 23 by the silicon dioxide particles 23a are formed The

In addition, when forming the uneven | corrugated layer 23 containing the nonelectroconductive particle 23a, although the film | membrane of the resin which has the said insulating property does not need to be formed on the said nonelectroconductive particle 23a, the resin film is formed. Is preferred.
A protrusion or the like may exist on the outer shape of the non-conductive particle 23a. Therefore, when the resin film is not formed on the non-conductive particles 23a, the protrusions damage the resistor layer 24 formed on the upper surface of the resin film (uneven layer 23), and the non-conductive particles This is because 23a may be exposed. That is, the resistor layer 24 may not be formed on the non-conductive particles 23a.

A resistor layer 24 is laminated on the surface of such an uneven layer 23.
The resistor layer 24 is formed of a phenol resin containing at least 1 wt% to 5 wt% of a silicon resin and 1 wt% to 10 wt% of a carbon powder, and the thickness of the resistor layer 24 is t4 is formed to ₅ μm to 20 μm.

Since the resistor layer 24 contains 1% by weight to 5% by weight of silicon resin, when a load is applied, the resistor layer 24 between the silicon dioxide particles 23a is easily deformed, and the electrode layers 13A and 13B. Can be gradually contacted.
On the other hand, if the carbon powder is less than 1% by weight, the resistance value becomes too large, and if it exceeds 10% by weight, the resistance value becomes too small. The amount of carbon is set so that the resistance value falls within the range of several kilo ohms to several tens of kilo ohms. In general, it is desirable that the carbon powder is contained in an amount of 1 wt% to 10 wt%.

  The film thickness of the resistor layer 24 is set from the particle diameter of the silicon dioxide particles 23 a and the thickness of the uneven layer 23. Furthermore, the resistance value increases as the film thickness of the resistor layer 24 decreases, while the resistance value decreases as the film thickness of the resistor layer 24 increases. Therefore, the film thickness of the resistor layer 24 is set so that the resistance value falls within the range of several kilo ohms to several tens of kilo ohms in consideration of the content of the carbon powder.

The sum of the thicknesses t ₃ and t ₄ of the uneven layer 23 and the resistor layer 24 between the silicon dioxide particles 23 a is set to be smaller than the particle size D of silicon dioxide contained in the uneven layer 23.
The sum of the thickness t ₄ of the thickness t ₃ and the resistor layer 24 of the concavo-convex layer 23, in the case of more than the particle size D of the silicon dioxide contained in the space portion S (a non-contact area shown in FIG. 3 ) Is not formed, and the entire resistor layer 24 is in contact with the electrode layer 13 when a load is applied.

Specifically, silicon dioxide particles 23a having a particle diameter D of 30 μm to 100 μm are contained, the film thickness t ₃ of the uneven layer 23 is formed to 10 μm to 30 μm, and the film thickness t _{4 of the} resistor layer 24. 2 to 20 μm, when the load P is applied as shown in FIG. 3 from the initial state shown in FIG. 2, first, the resistor layer 24 of the silicon dioxide particle 23a portion is the electrode layers 13A, 13B. To touch. In FIG. 3, X is a contact area, and S is a space (non-contact area).

At this time, in proportion to the increase in the applied load P, the resistor layer 24 of the silicon dioxide particle 23a portion (convex portion) comes into contact with the electrode layers 13A and 13B, whereby a pair of electrode layers 13A and 13B (comb electrodes). And the contact area of the resistor layer 24 increase. As a result, the resistance value changes greatly even with a small load change.
Further, when a load P of a predetermined magnitude or more is applied, the resistor layer 24 between the silicon dioxide particles 23a gradually comes into contact with the electrode layers 13A and 13B as shown in FIG. 4, and the contact region X is further expanded. To do.

  At this time, since the resistor layer 24 in the silicon dioxide particle 23a portion is already in contact with the pair of electrode layers 13A and 13B, the resistance value change with respect to the load change is small, but the resistor layer 24 between the silicon dioxide particles 23a. Is gradually brought into contact with the electrode layers 13A and 13B, the rate of change in resistance value (ΔR / ΔP) with respect to the rate of change in load can be increased, and even a large load (contact pressure) can be detected. Contact pressure) detection range can be obtained.

Further, as shown in FIG. 1, the first sensor structure 11 is connected to the data processing device 15 via the lead wire 14, and the data processing device 15 converts the detected resistance value into a load. The result is displayed.
In such a pressure-sensitive sensor 1, the result of having measured the change of the resistance value with respect to the load change is shown in FIG. As can be seen from FIG. 5, the pressure-sensitive sensor 1 has a large resistance value with respect to the load (contact pressure) in a load region where the load (contact pressure) is small, and the resistance value changes relatively smoothly.
Also, in a load region where the load (contact pressure) is large, the rate of change in resistance value (ΔR / ΔP) with respect to the rate of change in load gradually decreases, but the rate of change in resistance value is relatively large, and load detection The area can be extensive.

  As described above, according to the pressure-sensitive sensor 1 of the present embodiment, since the pressure-sensitive sensor 1 is separated into the first sensor structure 11 and the second sensor structure 21, the first sensor structure The load (contact pressure is easily detected directly on the body 11 or the second sensor constituting body 21 and the measurement accuracy is improved.

Further, the first sensor component 11 and the second sensor component 21 do not necessarily have flexibility, and the substrate 12 of the first sensor component 11 or the second sensor component 12 is not necessarily required. It is sufficient that at least one of the substrates 22 has flexibility.
That is, when the contact surface to which the sensor structure is attached is a flat surface and does not deform, a sensor structure that does not have flexibility can be used. On the other hand, when the contact surface to which the sensor structure is attached is curved or deformed, it is necessary to use a sensor structure having flexibility.

Moreover, when each of the 1st sensor structure 11 and the 2nd sensor structure 21 has a softness | flexibility, for example, the 1st sensor structure 11 is stuck on a to-be-contacted body. When the second sensor component 21 is adhered to the contact body, the first sensor component 11 and the second sensor structure 21 are adhered along the shape of the contacted body or the contact body. Can be arranged.
Therefore, the contact pressure between the contact body and the contacted body can be measured with higher accuracy by the configuration in which the first sensor structure body 11 and the second sensor structure body 21 have flexibility. it can.

  Next, the contact pressure measuring device 30 to which the pressure sensor 1 is applied will be described with reference to FIGS. FIG. 6 is a cross-sectional view corresponding to FIG. 14, and FIG. 7 is a perspective view showing the shape of the pressure-sensitive sensor attached to the contacted body and the contacted body, and FIG. The 1st sensor structure is shown, (b) has shown the 2nd sensor structure. FIG. 8 is an explanatory diagram showing a load (contact pressure) detection process by the pressure sensor.

In FIG. 6, the door 71 of the vehicle is connected to the vehicle body 70 side by a door hinge so that it can be opened and closed. A weather strip 72 as a seal member is attached to the periphery of the door 71.
Therefore, when the door 71 is closed, the weather strip 72 is elastically contacted to the vehicle body 71 side, and is sealed to prevent rainwater and drafts from entering the vehicle.

  The weather strip 72 is made of a rubber material or the like, and has a hollow main body 72a and an attachment base 72b. The main body 72a has flexibility and is elastically deformable. The attachment base 72 b is attached to the door 72, and the weather strip 72 is fixed to the periphery of the door 71.

The pressure sensor 1 is disposed between the vehicle body 70 side of the vehicle as the contacted body and the door 71 of the vehicle as the contacted body.
The pressure-sensitive sensor 1 measures the sealing performance when the door 71 is closed. That is, the load applied to the vehicle body 70 when the door 71 is closed (the load applied to the weather strip 72) is measured. As the load to be measured, loads in various states such as an initial load when the door 71 is closed, a reaction load thereof, a load when the door 71 is completely closed can be measured.

Specifically, the first sensor component 11 is attached to a portion (abutment surface) facing the door 71 on the vehicle body 70 side using an adhesive or the like, and the second sensor component 21 is fixed on the door 71 side. Attached to the weather strip 72, which is the contact surface, is disposed.
That is, the first sensor component 11 and the second sensor component 21 are arranged on the contact surfaces of the opposing vehicle body 70 (contacted member) and door 71 (contact member). It has become.
In this case, the electrode layers 13A and 13B of the first sensor structure 11 and the resistor layer 24 of the second sensor structure 21 are arranged to face each other.
Moreover, the 1st sensor structure 11 and the 2nd sensor structure 21 are each stuck along the shape of the vehicle body 7 and the weather strip 9, ie, the substantially curved surface shape which is non-planar shape. Specifically, as shown in FIG. 7, the first sensor structure 11 and the second sensor structure 21 have flexibility, so that the first sensor structure 11 and the second sensor structure 21 are bent into shapes that conform to the shapes of the vehicle body 70 and the weather strip 71. And pasted.

In addition, you may make it shape | mold the initial shape of the 1st sensor structure 11 and the 2nd sensor structure 21 in the shape along the shape of the vehicle body 70 and the weather strip 72 previously.
By performing such molding, the adhesion of the first sensor component 11 and the second sensor component 21 to the vehicle body 70 and the weather strip 72 can be easily increased.

  Next, a load (contact pressure) detection process by the pressure sensor 1 will be described with reference to FIG. 8A shows a state in which the door 71 is open, and FIG. 8B shows a state in which the door 71 is operated in the closing direction, and the second sensor component 21 contacts the first sensor component 11. (C) shows a state in which the door 71 is closed.

As shown in FIG. 8C, when the door 71 is closed, the weather strip 72 is in contact with the contact surface on the vehicle body 70 side with a predetermined load applied.
In this case, the weather strip 72 is elastically deformed to elastically contact the contact surface on the vehicle body 70 side, and the second sensor component 21 is also deformed following the elastic deformation of the weather strip 72.

Therefore, the resistor layer 24 of the second sensor structure 21 contacts the electrode layers 13A and 13B of the first sensor structure 11 with a predetermined load.
A change in resistance value is detected according to a change in the contact area between the resistor layer 24 and the electrode layers 13A and 13B due to a change in load (contact pressure) at the time of contact.
This detection output is converted into a load (contact pressure) applied between the first sensor component 11 and the second sensor component 21 in the data processor 15 (see FIG. 1). Is displayed.

As described above, according to the contact pressure measuring device 30 of the present embodiment, in addition to the effects of the pressure-sensitive sensor 1 described above, the first sensor component 11 and the second sensor component 21 are contacted or Since it can be arranged along the shape of the contact surface of the contact body and can be deformed following the deformation of the contact surface, the contact pressure of the close contact portions on the mutual contact surfaces with high accuracy Measurement can be performed.
Therefore, by using such a contact pressure measuring device 30, in order to improve the sealing performance of the weather strip 72, the measurement result can be effectively fed back in design and manufacture, and the weather strip 72 having high reliability can be obtained. Can be obtained.

As shown in FIG. 9, the pressure-sensitive sensors 1 of this embodiment may be arranged at a plurality of locations on the vehicle door 71 and simultaneously measure the contact pressure. FIG. 9 schematically shows the inside of the door 71, and specifically shows a state in which the second sensor components 21 are arranged at a plurality of locations on the weather strip 72 of the door 71.
According to such a configuration, it is possible to measure the adhesion (load) state of the weather strip 72 at a plurality of locations.

Further, as shown in FIG. 10, in the second sensor structure 21 attached to the weather strip 9, a resistor layer 24 (24a, 24b, 24c) is divided into a plurality of substrates 22 in one piece. A block may be formed.
With such a configuration, it is possible to detect loads at a plurality of portions corresponding to the resistor layers 24a, 24b, and 24c. For example, it is possible to detect a load (contact pressure) applied to a contacting part, a non-contacting part, and a contacting part.
In addition, of course, the electrode layers 13A and 13B side of the first sensor structure 11 may be divided into a plurality of blocks.

In addition, this invention is not limited to the structure of the said embodiment, A various deformation | transformation is possible in the range which does not deviate from the summary of invention. Moreover, the said embodiment is shown as an example and is not intending limiting the range of invention.
For example, the contacted body and the contact body are not limited to the relationship between the vehicle body and the door, but may be the relationship between a room in a predetermined space and a door, or a box-shaped body and a lid.
In addition, the pressure-sensitive sensors can be disposed at various locations of the vehicle, and can be disposed at the vehicle body and the bumper in order to grasp the deformation location of the vehicle body and the strength of the impact at the time of the collision. Furthermore, pressure-sensitive sensors can be arranged at various places to detect the influence of the vehicle body strength due to the vibration of the vehicle and the contact state and deformation state of each component due to the vibration.

DESCRIPTION OF SYMBOLS 1 Pressure sensor 11 1st sensor structure 12 Board | substrate 13A, 13B of 1st sensor structure 14 Electrode layer 14 Lead wire 15 Data processing device 21 2nd sensor structure 22 Board | substrate of 2nd sensor structure 23 Unevenness | corrugation Layer 24 Resistor layer 70 Car body (contact body)
71 Door (contact body)
72 Weather Strip

Claims (7)

A pressure-sensitive sensor provided on a contact surface of the contacted body and the contact body for detecting a contact pressure when the contact surface comes into contact;
A first sensor structure having a conductive electrode layer formed on an insulating substrate disposed on one of the contact surfaces;
A second sensor structure which is separated from the first sensor structure and is formed as a separate body, and disposed on the other of the contact surfaces, and having a resistor layer formed on an insulating substrate. ,
The first sensor component and the second sensor component are respectively disposed on the contacted member and the contact member that are movable by the hinge so as to contact each other at the contact surfaces that are fixed to each other.
At least one of the substrate of the first sensor component or the substrate of the second sensor component has flexibility,
In addition, the contact area between the resistor layer and the electrode layer changes due to a change in the load applied between the first sensor structure and the second sensor structure, and a resistance value corresponding to the contact area is detected. A pressure sensitive sensor.   In the second sensor structure, a concavo-convex layer is formed on the surface of the substrate with an insulating resin containing non-conductive particles, and a resistor layer containing carbon powder is laminated on the concavo-convex layer. The pressure-sensitive sensor according to claim 1.   The pressure-sensitive sensor according to claim 1 or 2, wherein the electrode layer in the first sensor structure is made of silver or a carbon material.   The pressure sensor according to any one of claims 1 to 3, wherein a resistor layer divided into a plurality of parts is formed on a substrate of the second sensor constituting body. A contact pressure measuring device provided on a mutual contact surface of an abutted body and an abutting body to which the pressure sensitive sensor according to any one of claims 1 to 4 is opposed.
The first sensor component is provided on one of the contact surfaces, the second sensor component is provided on the other of the contact surfaces, and the first sensor component and the second sensor component are provided. Are arranged on the abutted body and the abutting body that are movable by the hinges so as to abut on the abutting surfaces determined from each other,
By a change of load applied between the second sensor structure and the first sensor structure, the contact area of the resistor layer and the electrode layer is changed,
A contact pressure applied between the first sensor component and the second sensor component is detected by detecting a resistance value according to the contact area. Measuring device.   6. The contact according to claim 5, wherein at least one of the first sensor component and the second sensor component is deformed along the shape of the contact surface. Pressure measuring device.   7. The contact pressure measuring device according to claim 5, wherein one of the mutual contact surfaces is a vehicle body of a vehicle and the other is a weather strip provided on a door of the vehicle.

Images