JP2021014131A - Pressure sensitive device and vehicle - Google Patents

Abstract

To provide a pressure sensitive device which is capable of discriminating a colliding object precisely.SOLUTION: A pressure sensitive device (1) comprises: a pressure sensitive part (110) provided on a surface of a vehicle; a measuring part (120) which acquires pressure distribution to which the pressure sensitive part (110) is subjected; and a recording part (130) which records measurement information of the measuring part (120) along with secular change. The pressure sensitive part (110) is provided on the front face of the vehicle. The measuring part (120) acquires the pressure distribution to which the pressure sensitive part (110) is subjected. The recording part (130) records the measurement information of the measuring part (120) along with the secular change.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to pressure sensitive devices and vehicles.

Patent Document 1 describes an absorber disposed on the entire surface of a bumper reinforcement in a bumper cover, a chamber formed inside the absorber, a pressure detecting means for detecting a pressure change in the chamber, and a pressure by the pressure detecting means. Disclosed is an obstacle discriminating device for a vehicle provided with an obstacle discriminating means for discriminating the type of an obstacle based on a change detection result. This vehicle obstacle discriminating device discriminates the type of obstacle colliding with the vehicle bumper based on the detection result of the pressure change in the chamber. This makes it possible to estimate the collision object from the magnitude of the impact applied to the vehicle.

Japanese Unexamined Patent Publication No. 2006-117157

The present disclosure provides a pressure sensitive device and a vehicle capable of accurately discriminating a collided object.

The pressure-sensitive device of the present disclosure includes a pressure-sensitive unit provided on the surface of a vehicle, a measuring unit that acquires the pressure distribution received by the pressure-sensitive unit, and a recording unit that records the measurement information of the measuring unit along with the change over time. And. The pressure sensitive portion is provided on the surface of the vehicle. The measuring unit acquires the pressure distribution received by the pressure-sensitive unit. The recording unit records the measurement information of the measuring unit together with the change over time.

The vehicle of the present disclosure includes the pressure sensitive device described above.

According to the pressure sensitive device and the vehicle in the present disclosure, the collided object is accurately discriminated.

Block diagram of the collision detection device according to the first embodiment of the present disclosure. Schematic diagram showing the pressure sensor and the drive circuit according to the first embodiment Schematic diagram showing the pressure sensor and the drive circuit according to the first embodiment The figure which shows the change of the capacitance with respect to the load applied to the pressure sensor in Embodiment 1. Schematic diagram for explaining the acquisition of the pressure distribution received by the pressure sensor in the first embodiment. The figure which shows the circuit structure of the drive circuit and the determination circuit of the pressure sensor in Embodiment 1. Schematic diagram showing a pressure sensor, a drive circuit, and a determination circuit according to the first embodiment. A flowchart showing processing when the determination circuit in the first embodiment detects a collision. The figure which shows the determination example when the determination circuit in Embodiment 1 detects a collision. Schematic diagram showing the arrangement area of the pressure sensor on the vehicle according to the first embodiment. The figure which shows the state which activated the airbag by the safety device actuation circuit in Embodiment 1. The figure which shows the collision example of the vehicle and another vehicle in Embodiment 1. Schematic diagram showing information of the pressure sensor according to the first embodiment The figure which shows the example of the collision between the vehicle and the bicycle in Embodiment 1. Schematic diagram showing information of the pressure sensor according to the first embodiment Schematic diagram showing the pressure sensor and the drive circuit according to the second embodiment Schematic diagram showing the pressure sensor and the drive circuit according to the second embodiment Schematic diagram showing the configuration of the pressure sensor according to the third embodiment Schematic diagram showing the configuration of the pressure sensor according to the third embodiment Schematic diagram showing the configuration of the pressure sensor according to the fourth embodiment Schematic diagram showing the configuration of the pressure sensor according to the fourth embodiment

Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed explanation than necessary may be omitted. For example, detailed explanations of already well-known matters and duplicate explanations for substantially the same configuration may be omitted. This is to avoid unnecessary redundancy of the following description and to facilitate the understanding of those skilled in the art.
It should be noted that the inventors (or others) intend to limit the subject matter described in the claims by those skilled in the art by providing the accompanying drawings and the following description in order to fully understand the present disclosure. It is not something to do.

(Embodiment 1)
1. 1. Configuration 1.1 Overall Configuration FIG. 1 is a block diagram showing an outline of a collision detection device which is an example of the pressure sensitive device according to the first embodiment of the present disclosure. The collision detection device 1 of the present embodiment includes a pressure sensor unit 100, a safety device unit 200, and a power supply unit 300.

1.2 Configuration of Pressure Sensor Unit The pressure sensor unit 100 includes a pressure sensor 110, a drive circuit 120, a determination circuit 130, and a storage circuit 140. The pressure sensor unit 100 is connected to the safety device unit 200 and the power supply unit 300.

The pressure sensors 110 are arranged at a plurality of locations on the surface of the vehicle. Here, the pressure sensor 110 provided on the surface of the vehicle includes a case where the pressure sensor 110 is provided on the outside of the exterior member constituting the body of the vehicle and a case where the pressure sensor 110 is provided on the inside of the exterior member. The pressure sensor 110 is composed of a combination of an electric wire in which a hard conducting wire having a circular cross section is coated with a dielectric material such as enamel, and an elastic electrode such as conductive rubber. When a vehicle in which the pressure sensor 110 is arranged collides with another vehicle or the like, a pressing force is applied to the electrode, and the flexibility of the electrode expands the contact area between the electrode and the dielectric of the electric wire. As a result, the capacitance between the wire lead and the electrode changes. In addition, there is a certain relationship between the change in contact area and the pressing force. Therefore, the pressing force can be detected by measuring the capacitance between the conducting wire of the electric wire and the electrode using the pressure sensor 110.

The drive circuit 120 supplies a constant voltage to the electric wire of the pressure sensor 110 via a resistor, and sets a so-called CR time constant, which is the time until the voltage of the electrode paired with the electric wire of the pressure sensor 110 reaches a predetermined voltage. By measuring, the capacitance between the conductor and the electrode of the electric wire is obtained. The drive circuit 120 can be composed of, for example, a microcomputer, a CPU, an MPU, a DSP, an FPGA, an ASIC, a resistor, a switching gate circuit, and the like. The function of the drive circuit 120 may be configured only by hardware, or may be realized by combining hardware and software.

The determination circuit 130 determines whether or not a collision has occurred based on the capacitance of each pressure sensor 110 measured by the drive circuit 120. The determination circuit 130 can be composed of, for example, a microcomputer, a CPU, an MPU, a DSP, an FPGA, and an ASIC. The function of the determination circuit 130 may be configured only by hardware, or may be realized by combining hardware and software. Further, the determination circuit 130 may be configured separately from the drive circuit 120, or may be configured integrally with the drive circuit 120.

The storage circuit 140 can be realized by, for example, a ROM, an SSD, a RAM, a DRAM, a ferroelectric memory, a flash memory, a magnetic disk, or a combination thereof. The storage circuit 140 records the capacitance of each pressure sensor 110 measured at predetermined intervals, the information referred to when the determination circuit 130 determines the occurrence of a collision, and the like. Further, the storage circuit 140 may store a drive circuit 120, a program for driving the determination circuit 130, and various data.

1.3 Configuration of Safety Device Unit The safety device unit 200 includes a safety device 210 and a safety device operation circuit 220. The safety device unit 200 is connected to the pressure sensor unit 100 and the power supply unit 300.

When a vehicle collides with another vehicle, a bicycle, or the like, the safety device 210 ensures safety and reduces damage caused by the collision. The safety device 210 can be realized by, for example, an airbag, an automatic brake, an automatic steering wheel operation, an automatic stop system, ABS, a brake assist, or the like. All of these may be provided, or a combination of these, or any one of them may be provided.

The safety device operation circuit 220 operates the safety device 210 based on the output from the determination circuit 130 of the pressure sensor unit 100. The safety device operating circuit 220 can be composed of, for example, a microcomputer, a CPU, an MPU, a DSP, an FPGA, and an ASIC. The function of the safety device operating circuit 220 may be configured only by hardware, or may be realized by combining hardware and software.

1.4 Configuration of power supply unit The power supply unit 300 is, for example, a rechargeable secondary battery such as a lithium ion battery, a lead storage battery, or a nickel hydrogen battery. The power supply unit 150 is commonly used for the pressure sensor unit 100 and the safety device unit 200.

2. 2. Configuration of Pressure Sensor FIG. 2 shows a configuration example of the pressure sensor 110. As shown in FIG. 2, the pressure sensor 110 includes a protective cover 111, a first electrode 112, a dielectric 114, and a second electrode 115. In FIG. 2, the dielectric 114 covers the second electrode 115, but it may cover the surface of either the first electrode 112 or the second electrode 115. The pressure sensor 110 is arranged so that the dielectric 114 is in contact with the surface of the vehicle body 400.

The protective cover 111 protects one surface of the first electrode 112. The protective cover 111 has a sheet-like or plate-like shape that covers one surface of the first electrode 112. The protective cover 111 can be realized by, for example, polycarbonate or silicone rubber. The protective cover 111 may be a conductor or an insulator, but an insulator is preferable.

The first electrode 112 has elasticity and conductivity. Elasticity refers to the property of being locally deformed by an external force and returning to its original shape when no external force is applied. Specifically, the first electrode 112 is a dielectric material with the surface of the first electrode 112 not covered by the protective cover 111 when a pressing force is applied to the first electrode 112 via the protective cover 111. It suffices to have elasticity so as to expand the area of the contact area with 114. Specifically, the first electrode 112 may have a lower elastic modulus than the dielectric 114 so that it deforms more than the dielectric 114 when a pressing force is applied.

From the viewpoint of expanding the measurement range of the pressing force and improving the pressure sensitive sensitivity, the elastic modulus of the first electrode 112 is preferably, for example, about 10 ⁴ Pa to 10 ⁸ Pa, and for example, about 10 It is ⁶ Pa. As the elastic modulus of the first electrode 112 increases within the above range, the measurement range of the pressing force becomes wider. The smaller the elastic modulus of the first electrode 112 is within the above range, the higher the pressure sensitive sensitivity. When the pressure-sensitive sensitivity is improved, for example, even a minute pressing force that is difficult to detect in the past can be detected. Along with this, it becomes possible to accurately detect the start of applying the pressing force.

Regarding conductivity, the resistivity of the first electrode 112 may be sufficiently smaller than the impedance of the capacitance in a desired frequency band. For this resistivity, the relative ratio between the conductive filler and the resin material (rubber material) described later can be changed.

The first electrode 112 may be made of any material as long as it has both elastic and conductive properties as described above. For example, the first electrode 112 may be composed of a resin material (particularly a rubber material) and a conductive resin made of a conductive filler dispersed in the resin material. The first electrode 112, which is preferable from the viewpoint of further expanding the measuring range of the pressing force, is composed of a rubber material and a conductive rubber composed of a conductive filler dispersed in the rubber material. Since the first electrode 112 is made of conductive rubber, the pressing force can be effectively detected, and the pressing feeling at the time of pressing can be produced. As the resin material, for example, at least one resin selected from the group consisting of styrene-based resin, silicone-based resin (for example, polydimethylpolysiloxane (PDMS)), acrylic-based resin, rotaxane-based resin, urethane-based resin, and the like. It may be a material. Examples of rubber materials include silicone rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, chloroprene rubber, nitrile rubber, polyisobutylene, ethylene propylene rubber, chlorosulfonated polyethylene, acrylic rubber, fluororubber, epichlorohydrin rubber, and urethane rubber. It may be at least one rubber material selected from the group consisting of the above. Conductive fillers are Au (gold), Ag (silver), Cu (copper), C (carbon), ZnO (zinc oxide), In ₂ O ₃ (indium oxide (indium (III))) and SnO ₂ (tin oxide). It may contain at least one material selected from the group consisting of (IV)), and a conductive layer may be used in place of or in addition to the conductive filler. May be the first conductive member in which a conductive layer is provided on the surface of a resin structure (particularly a rubber structural material) made of the above-mentioned resin material (particularly a rubber material) by applying a conductive ink or the like.

The thickness of the first electrode 112 is not particularly limited as long as the capacitance between the first electrode 112 and the second electrode 115 changes due to an external pressing force, and is usually 100 μm to 10 cm, preferably 100 μm to 10 cm. It is 500 μm to 1 cm, and for example, 1 mm is more preferable.

The first electrode 112 usually has a sheet-like or plate-like shape, but for example, as shown in FIG. 2, the first electrode 112 is located directly above the second electrode 115 and is located at a position corresponding to the second electrode 115. As long as at least a part of the electrode 112 is arranged, it may have any shape, for example, an elongated shape (for example, a linear shape).

The first electrode 112, which is not involved in the measurement, is preferably connected to the ground (0V) of the collision detection device 1 from the viewpoint of preventing noise when measuring the pressing force.

The first electrode 112 can be obtained by the following method. For example, first, a conductive filler is contained in a solution of a desired resin material (rubber material) or a raw material solution to obtain a composite material. Next, the composite material is applied and dried on the peeling base material, cured (crosslinked) as desired, and then peeled off from the peeling base material to obtain a first electrode 112.

The first electrode 112 can also be obtained by the following alternative method. For example, first, a solution of a desired resin material (rubber material) or a raw material solution is applied and dried on a peeling substrate, and then cured (crosslinked) as desired. Next, an ink containing a conductive filler is applied to the surface of the obtained resin layer (rubber layer) to form a conductive layer, and then the resin layer (rubber layer) is peeled off from a peeling base material to obtain a first electrode 112.

The second electrode 115 has at least conductivity. The second electrode 115 is usually flexible, but may be elastic. Flexibility refers to the property of returning to the original shape when the external force disappears, even if it bends and deforms as a whole due to the external force. If the second electrode 115 has flexibility, for example, ¹⁰ 8 Pa ^{greater, 10} 12 Pa modulus below, in one example, it has a modulus of from about 1.2 × ¹⁰ 11 Pa. Regarding conductivity, the second electrode 115 may have a resistivity sufficiently smaller than the impedance of the capacitance in a desired frequency band.

The second electrode 115 may be made of any material as long as it has at least conductivity. When the second electrode 115 has flexibility, it may be made of, for example, a metal body, or may be formed on a glass body, a conductive layer and / or a resin body formed on the surface thereof, and the surface thereof. It may be composed of the formed conductive layer and / or the conductive filler dispersed in the resin body thereof. The metal body may be an electrode member made of metal, that is, the second electrode 115 may be substantially made of metal. The metal body is, for example, Au (gold), Ag (silver), Cu (copper), Ni—Cr alloy (nichrome), C (carbon), ZnO (zinc oxide), In ₂ O ₃ (indium oxide (indium (indium (indium)). It comprises at least one material selected from the group consisting of III))) and SnO ₂ (tin (IV) oxide). The glass body is particularly limited as long as it has a network structure of silicon oxide. However, for example, it may be composed of at least one glass material selected from the group consisting of quartz glass, soda lime glass, borosilicate glass, lead glass and the like. The resin body may be a styrene resin. It may contain at least one resin material selected from the group consisting of silicone-based resins (for example, polydimethylpolysiloxane (PDMS)), acrylic-based resins, rotaxane-based resins, urethane-based resins, and the like. The conductive layer of the glass body and the resin body may be a layer formed by depositing at least one metal selected from the group of metals similar to the metal that can form the metal body, or a conductive ink. The conductive filler of the glass body and the resin body contains at least one metal selected from the group of metals similar to the metals that can form the metal body. The second electrode 115 may be made of the same conductive rubber as the first electrode 112 if it has elasticity.

The second electrode 115 is usually a long member having a long shape (for example, linear shape). When the second electrode 115 is a long member and is made of a metal body, the second electrode 115 corresponds to a metal wire or a metal wire (for example, a copper wire) and has a measuring range of pressing force. It is preferable from the viewpoint of further expansion and improvement of pressure sensitive sensitivity. When the second electrode 115 is a long member, the long member may be arranged without applying tension to the long member from the viewpoint of improving the mountability of the pressure sensor 110 on the curved surface. preferable.

The cross-sectional shape of the second electrode 115 is not particularly limited as long as the area of the contact region is expanded by applying a pressing force, and may be, for example, a circular shape as shown in FIG. 2, an elliptical shape, or an elliptical shape. It may be triangular or the like.

The cross-sectional dimension of the second electrode 115 is not particularly limited as long as the capacitance between the second electrode 115 and the first electrode 112 can be measured, and is usually 1 μm to 10 mm, and the pressing force is measured. From the viewpoint of further expanding the range and improving the pressure sensitive sensitivity, it is preferably 100 μm to 1 mm. As an example, 300 μm is more preferable. When the cross-sectional dimension of the second electrode 115 is reduced, the change in the area of the contact region becomes large, and the pressure sensitive sensitivity is improved. Increasing the cross-sectional dimension of the long member further widens the measurement range of the pressing force. The cross-sectional dimension of the second electrode 115 is the maximum dimension in the cross-sectional shape. Specifically, the cross-sectional dimension of the second electrode 115 is the maximum dimension in the cross section perpendicular to the longitudinal direction, for example, the diameter, assuming that the second electrode 115 has a linear shape.

In FIG. 2, the dielectric 114 completely covers the entire surface of the second electrode 115, but in the covering region of the dielectric 114, the dielectric 114 is the first electrode 112 or the second electrode 115. There is no particular limitation as long as the surface is covered at least partially. The dielectric 114 covers the surface of the first electrode 112 or the second electrode 115 at least partially, that the dielectric 114 covers the portion between the first electrode 112 and the second electrode 115. The state of being. In other words, the dielectric 114 may cover at least a portion of the surface of the first electrode 112 or the second electrode 115 as long as it exists between the first electrode 112 and the second electrode 115. .. With respect to the dielectric 114, “covering” means being integrated with the surface of either the first electrode 112 or the second electrode 115 while being in close contact with each other in a covering manner.

From the viewpoint of further simplifying the structure of the pressure sensor 110, the dielectric 114 preferably covers the entire surface of one of the first electrode 112 or the second electrode 115. From the viewpoint of further simplification of the structure of the pressure sensor 110 and the availability of materials for the pressure sensor 110, it is preferable that the dielectric 114 completely covers the entire surface of the second electrode 115. When the dielectric 114 completely covers the entire surface of the second electrode 115, the dielectric 114 constitutes the insulating coating of the second electrode 115, and the dielectric 114 and the second electrode 115 are usually , Is integrated. The integrated dielectric 114 and the second electrode 115 may correspond to an insulating coated metal wire, and may be, for example, an enamel wire or an element wire. If an insulating coated metal wire is used, the pressure sensor 110 can be configured without a photolithography process such as etching by simply arranging the wire between the first electrode 112 and the vehicle body 400. Therefore, the structure of the pressure sensor 110 can be configured. The simplification can be achieved even more sufficiently, and the manufacturing cost is low.

The dielectric 114 may be made of any material as long as it has at least the property of a "dielectric". For example, the dielectric 114 may include a resin material, a ceramic material, and / or a metal oxide material. As an example, the dielectric 114 is made of a polypropylene resin, a polyester resin (for example, a polyethylene terephthalate resin), a polyimide resin, a polyphenylene sulfide resin, a polyvinyl formal resin, a polyurethane resin, a polyamideimide resin, a polyamide resin, or the like. It may consist of at least one resin material selected from the group, or may consist of at least one metal oxide material selected from the group consisting of Al ₂ O ₃ and Ta ₂ O _{5 and the} like. You may. The dielectric 114 is usually made of a material having a resistance value higher than the impedance of the capacitance in a desired frequency band.

The dielectric 114 usually has rigidity. Rigidity refers to the property of resisting deformation due to external force. The dielectric 114 is usually not deformed by the usual pressing force as described above. The dielectric 114 may have a higher elastic modulus than the first electrode 112 so as not to be deformed more than the first electrode 112 when a pressing force is applied to the pressure sensor 110. For example, the elastic modulus of the first electrode 112, if it is about ¹⁰ 4 Pa to 10 ⁸ Pa, a modulus of elasticity higher than that may have a dielectric 114.

The thickness of the dielectric 114 is not particularly limited as long as the capacitance between the first electrode 112 and the second electrode 115 changes due to an external pressing force, and is usually 20 nm to 2 mm, which is an example. 10 μm is more preferable.

When the dielectric 114 is made of a resin material, it can be formed by a coating method in which a resin material solution is applied and dried, an electrodeposition method in which electrodeposition is performed in the resin material solution, or the like. When the dielectric 114 is made of a metal oxide material, it can be formed by an anodizing method or the like.

In the drive circuit 120, the wiring drawn from the first electrode 112 and the wiring drawn from the second electrode 115 are electrically connected via the terminals T1 and T2, respectively. From the viewpoint of stabilizing the pressing force detection by reducing the influence of noise, among the wiring drawn from the first electrode 112, the wiring drawn from the first electrode 112 that is not involved in the measurement of capacitance is , It is preferable to use the ground potential of the drive circuit 120.

When a plurality of the first electrode 112 and the second electrode 115 are used, the drive circuit 120 is electrically connected to the wiring drawn from each of the plurality of first electrode 112 and the second electrode 115. Equipped with multiple terminals for. Further, a switching gate circuit is provided between the first electrode 112 and the second electrode 115 and the drive circuit 120, and wiring and switching drawn from each of the plurality of first electrode 112 and the second electrode 115 are provided. The gate circuit may be connected, and the switching gate circuit and the terminal of the drive circuit 120 may be connected.

In the pressure sensor 110 of the present embodiment, as shown by an arrow in FIG. 3, when a pressing force is applied to the pressure sensor 110, the area of the contact region between the first electrode 112 and the dielectric 114 becomes the first. It expands based on the elasticity of the electrode 112 of 1. As a result, the capacitance C [pF] between the first electrode 112 and the second electrode changes. The capacitance C [pF] and the pressing force F [N] applied to the pressure sensor 110 are represented by the following equations, respectively.

C = εS / d

In the above formula, ε [pF / m] is the dielectric constant of the dielectric 114, S [m ² ] is the contact area between the first electrode 112 and the dielectric 114, and d [m] is the thickness of the dielectric 114. ..

F = E · eS

In the above formula, E [Pa] is the Young's modulus of the first electrode 112, and e is the strain of the first electrode 112.

FIG. 4 is a diagram showing a change in capacitance with respect to a load (pressing pressure) applied to the pressure sensor in the present embodiment. When a pressing force is applied to the pressure sensor 110 and the contact area S between the first electrode 112 and the dielectric 114 changes, the capacitance C between the first electrode 112 and the second electrode C becomes as shown in FIG. Changes to. The drive circuit 120 obtains the contact area S by measuring the capacitance C, and detects the pressing force F from the obtained contact area S.

The capacitance C is measured as follows. In the present embodiment, a resistor R is connected between the terminal T1 of the drive circuit 120 and the second electrode 115 to form an RC series circuit. When a constant DC voltage is applied to the terminal T1 of the drive circuit 120, the time t until the voltage across the second electrode 115 and the first electrode 112 reaches a predetermined voltage is proportional to the capacitance C. .. Therefore, the capacitance C can be measured by measuring this time t.

FIG. 5 is a schematic diagram for explaining the acquisition of the pressure distribution received by the pressure sensor 110 in the present embodiment. In the present embodiment, the pressure sensor 110 is arranged in a wide area of the vehicle body 400, and not only the pressing force is detected by each pressure sensor 110 but also the pressure distribution in the area is acquired. Therefore, as shown in FIG. 5, a plurality of first electrodes 112 are installed in the left-right direction, a plurality of second electrodes 115 are installed in the vertical direction, and a portion where the two electrodes overlap is used as a sensor unit in a matrix. It constitutes the structure. In the example shown in FIG. 5, the sensor units A1 to A4 are the portions shown by the dotted lines.

When measuring the capacitance of the sensor unit A1, the capacitance between the first electrode 112a and the second electrode 115a is measured, and the first electrode 112b and the second electrode 115b have the same voltage as the ground. To. Capacitance between the first electrode 112b and the second electrode 115a, capacitance between the first electrode 112a and the second electrode 115b, and capacitance between the first electrode 112b and the second electrode 115b. Capacity is not measured. In the same way, the capacitance of each of the sensor units A2, A3, and A4 is measured.

As described above, in the present embodiment, since the matrix structure of the sensor unit is adopted, not only the pressing force of each sensor unit but also the pressure distribution in a predetermined region can be acquired.

3. 3. Drive circuit
FIG. 6 is a diagram showing a circuit configuration of a drive circuit 120 and a determination circuit 130 of the pressure sensor 110 according to the present embodiment. In the example shown in FIG. 6, six first electrodes 112a to 112f are arranged in the left-right direction, and six second electrodes 115a to 115f are arranged in the vertical direction. The drive circuit 120 and the determination circuit 130 are integrally configured by a microcomputer as an example. A resistor 121 having a resistance value R is connected to the terminal T2 of the drive circuit 120, and a switching gate circuit 122 is connected to the resistor 121. The second electrodes 115a to 115f are connected to the switching gate circuit 122. A switching gate circuit 123 is connected to the terminal T1 of the drive circuit 120. The first electrodes 112a to 112f are connected to the switching gate circuit 123. The switching gate circuit 122 is connected to the terminal T3 of the drive circuit 120 via the selection control line 124, and one of the second electrodes 115a to 115f conducts with the resistor 121 by the selection control signal output from the terminal T3. .. Further, the switching gate circuit 123 is connected to the terminal T4 of the drive circuit 120 via the selection control line 125, and one of the first electrodes 112a to 112f is connected to the terminal T1 by the selection control signal output from the terminal T4. Conducts.

In the above configuration, when measuring the capacitance of the sensor unit in which the two electrodes of the second electrode 115a and the first electrode 112a overlap, the drive circuit 120 is connected to the terminal T3 to the second electrode 115a. The selection control signal for selecting the first electrode 112a is output, and the selection control signal for selecting the first electrode 112a is output from the terminal T4. The drive circuit 120 outputs a constant voltage from the terminal T2, measures the time when the voltage of the terminal T1 reaches a predetermined voltage, measures the capacitance, and detects the pressing force. Next, the drive circuit 120 outputs a selection control signal for selecting the second electrode 115b from the terminal T3, and outputs a selection control signal for selecting the first electrode 112a from the terminal T4. The drive circuit 120 outputs a constant voltage from the terminal T2, measures the time when the voltage of the terminal T1 reaches a predetermined voltage, and is a sensor unit in which the two electrodes of the second electrode 115b and the first electrode 112a overlap. Capacitance is measured and pressing force is detected. Hereinafter, in the same manner, the capacitance of the sensor unit in which each of the second electrodes 115c to 115f and the two electrodes of the first electrode 112a overlap each other and the pressing force are detected.

Next, the drive circuit 120 outputs a selection control signal for selecting the second electrode 115a from the terminal T3, and outputs a selection control signal for selecting the first electrode 112b from the terminal T4. The drive circuit 120 outputs a constant voltage from the terminal T2, measures the time when the voltage of the terminal T1 reaches a predetermined voltage, and is a sensor unit in which the two electrodes of the second electrode 115a and the first electrode 112b overlap. Capacitance is measured and pressing force is detected. Hereinafter, in the same manner, the capacitance of the sensor unit in which each of the second electrodes 115b to 115f and the two electrodes of the first electrode 112b overlap each other and the pressing force are detected.

By performing the above processing in the same manner, the drive circuit 120 has the capacitance of the sensor unit in which the two electrodes of the first electrodes 112a to 112f and the two electrodes of the second electrodes 115a to 115f overlap each other. Measure and detect pressing force. In the present embodiment, the capacitance of each sensor unit is measured and the pressing force is detected at predetermined time intervals as described above. With such a configuration, it is possible to detect the pressing force in the sensor portion of the matrix structure and acquire the pressure distribution.

FIG. 7 is a schematic view showing another example of the pressure sensor 110, the drive circuit 120, and the determination circuit 130 in the present embodiment. FIG. 7 shows a case where the pressing force is detected in a single sensor unit in which the two electrodes of the first electrode 112a and the second electrode 115a overlap each other without adopting the sensor unit having the matrix structure as described above. It becomes a composition.

Further, although not shown, a plurality of second electrodes 115 may be provided at positions facing each other of the plurality of first electrodes 112.

A resistor 121 having a resistance value R is connected to the terminal T2 of the drive circuit 120, and a second electrode 115 is connected to the resistor 121. The first electrode 112 is connected to the terminal T1 of the drive circuit 120. When measuring the capacitance of the sensor unit, the drive circuit 120 outputs a constant voltage from the terminal T2, measures the time when the voltage of the terminal T1 reaches a predetermined voltage, and measures the capacitance. Detects the pressing force. According to such a configuration, it is possible to measure the capacitance in the sensor unit and detect the pressing force with a simple configuration.

4. Operation FIG. 8 is a flowchart showing a process when the determination circuit 130 in the present embodiment detects a collision. In the present embodiment, the determination circuit 130 is integrally configured with the drive circuit 120 by a microcomputer as shown in FIG.

The determination circuit 130 detects that a collision has occurred when the pressing force detected by the drive circuit 120 exceeds a predetermined value (S10). Next, the determination circuit 130 acquires shape information (S11), impact force information (S12), and impact force time change information (S13).

FIG. 10 is a schematic view showing an arrangement region of the pressure sensor 110 on the vehicle body 400 according to the present embodiment. In the present embodiment, as shown in FIG. 10, the sensor unit having the matrix structure as described above includes the area B1 near the front bumper of the vehicle body 400, and the areas near the front fenders, doors, and rear fenders on both sides. B2 and, although not shown, are arranged in the area near the rear bumper.

FIG. 12 is a diagram showing an example of a collision between a vehicle and another vehicle in the present embodiment. FIG. 13 is a schematic view showing information of the pressure sensor 110 according to the present embodiment. FIG. 14 is a diagram showing an example of a collision between a vehicle and a bicycle in the present embodiment. FIG. 15 is a schematic view showing information of the pressure sensor 110 in the present embodiment.

For example, as shown in FIG. 12, when the vehicle of the present embodiment collides with another vehicle, the pressing force and the pressure distribution of the sensor unit arranged in the region B1 near the front bumper of the vehicle body 400 are changed. It becomes as shown in FIG. Each square shown in FIG. 13 corresponds to each of the sensor units arranged in the area B1, and the darker the color of each square, the greater the pressing force. In this example, when the vehicle body 400 is viewed from the front, it can be seen that the right portion is uniformly subjected to a strong pressing force.

Further, as shown in FIG. 14, when the vehicle of the present embodiment collides with the bicycle, the pressing force and the pressure distribution of the sensor unit arranged in the region B1 near the front bumper of the vehicle body 400 are shown in FIG. Will be shown in. Each square shown in FIG. 15 corresponds to each of the sensor units arranged in the area B1, and the darker the color of each square, the greater the pressing force. In this example, when the vehicle body 400 is viewed from the front, it can be seen that the left side portion receives a lower pressing force than when it collides with the vehicle. In addition, it can be seen that the parts receiving the pressing force are not uniform and are dispersed in places.

As described above, the magnitude of the pressing force received by the sensor unit and the pressure distribution differ depending on the colliding object. Therefore, the determination circuit 130 of the present embodiment acquires the shape information of the pressure distribution of the sensor unit represented by FIGS. 13 and 15 (S11). Further, the determination circuit 130 acquires impact force information from the magnitude of the pressing force of each sensor unit (S12). Further, the determination circuit 130 confirms the pressing force at predetermined time intervals and acquires the time change information of the impact force (S13).

The determination circuit 130 determines the type of the collided object, the position where the collision occurred, and the like from the combination of the shape information, the impact force information, and the time change information of the impact force as described above (S14). In making this determination, the determination circuit 130 performs learning by machine learning or the like (S14).

FIG. 9 is a diagram showing a determination example when the determination circuit 130 in the present embodiment detects a collision. As shown in FIG. 9, when the shape of the pressure distribution is arbitrary, the impact force is strong, and the impact force continues for a long time, the determination circuit 130 determines that the colliding target is the guardrail. When the shape of the pressure distribution is arbitrary, the impact force is weak, and the impact force lasts for a short time, the determination circuit 130 determines that the colliding target is the rubber pole. When the shape of the pressure distribution is arbitrary, the impact force is strong, and the impact force continues for a long time, the determination circuit 130 determines that the collision target is a utility pole. The difference from the guardrail can be judged by the shape of the pressure distribution. The determination circuit 130 determines that the object is a person when the shape of the pressure distribution is arbitrary, the impact force is medium, and the impact force lasts for a medium period of time. When the shape of the pressure distribution is arbitrary, the impact force is weak, and the impact force lasts for a short time, the determination circuit 130 determines that the object is a bicycle. The determination circuit 130 determines that the object is a vehicle when the shape of the pressure distribution is arbitrary but covers a wide area, the impact force is strong, and the impact force continues for a long time.

When the determination circuit 130 determines the type of the collided object, the position where the collision has occurred, and the like, the determination circuit 130 outputs an instruction to operate the safety device 210 to the safety device unit 200 (S15). This instruction includes information on the location of the collision. The determination circuit 130 may consider the speed information of the vehicle when determining whether or not to operate the safety device 210. As a result, it is possible to operate the airbag that operates on the outside of the vehicle for protection such as pedestrians and bicycles, judging from the position and magnitude of the impact force and the vehicle speed. Airbags that operate on the outside of the vehicle are economical because they can be operated only at appropriate locations from among a plurality of equipped airbags. Whether or not to use the vehicle speed as a determination material may have a switching device that can be set according to the intention of the vehicle owner.

FIG. 11 is a diagram showing a state in which the safety device operating circuit 220 according to the present embodiment operates the airbag as the safety device 210. In the present embodiment, as an example, as shown in FIG. 11, the area where the sensor unit is arranged is divided into several safety device installation areas, and airbags are installed in each safety device installation area. In the example shown in FIG. 11, the area B1 near the front bumper is divided into safety device installation areas C1 to C5, and the front fenders, doors, and the area B2 near the rear fenders on both sides are divided into safety device installation areas C6 to C8. It is divided.

The safety device 210 may include not only an airbag that operates toward the outside of the vehicle but also an airbag that operates toward the inside of the vehicle. By operating the airbag in the vehicle, it is possible to prevent the driver of the vehicle from colliding with the front window or the like. Further, the safety device 210 may include not only an airbag but also an automatic brake operation, an automatic steering wheel operation, and an alarm. By operating the automatic brake, the automatic steering wheel, and the alarm, it is possible to prevent the damage from the collision from spreading. Further, by activating the alarm when the surface of the vehicle body 400 comes into contact with something during slowing down such as when entering the garage, it is possible to prevent the damage from spreading due to the contact. Moreover, you may operate a surveillance camera as a surveillance device. By activating the surveillance camera, it is possible to record the situation at the time of a collision. The alarm may be a horn, a buzzer, or the like. By using a horn, a buzzer, or the like, it is possible to notify the driver that there has been a contact as well as a collision. Further, in the event of a collision, the vehicle owner may be notified by sending an e-mail to a mobile phone or a smartphone. In this way, when a person other than the vehicle owner is driving and a collision occurs, the vehicle owner can quickly respond.

When the safety device operating circuit 220 receives an instruction to operate the safety device 210 together with the information on the position where the collision has occurred from the determination circuit 130, the safety device operating circuit 220 receives the information on the position where the collision has occurred, and the corresponding safety device installation area. Activate the airbag. Therefore, even if a collision occurs, the damage caused by the collision can be reduced. In particular, when a bicycle collides, it is possible to prevent the driver who was driving the bicycle from directly hitting the vehicle body 400. Further, the airbag may be activated only when it is determined that the colliding object is a person or a bicycle.

After the safety device 210 is operated as described above, the determination circuit 130 stores the information before and after the collision in the storage circuit 140 (S16). By storing the information before and after the collision in this way, it becomes possible to make a more accurate determination in the learning function in machine learning or the like.

5. Effects, etc. The collision detection device 1 (example of the pressure sensitive device) of the present disclosure includes a pressure sensor 110 as an example of a pressure sensitive unit provided on the surface of the vehicle body 400, and a drive circuit for acquiring the pressure distribution received by the pressure sensor 110. A 120 and a determination circuit 130 as an example of a recording unit that records the measurement information of the drive circuit 120 with the change over time are provided. As a result, the position and degree of impact can be determined by recording the change over time in the pressure distribution instead of detecting a single pressure value. The impact position and degree data can be used as reference data when determining the error rate at the time of an accident.

The collision detection device 1 of the present disclosure includes a safety device unit 200 that operates based on measurement information measured by a drive circuit 120 as an example of a measurement unit. The determination circuit 130 determines the position and degree of impact of the measurement information measured by the drive circuit 120, and the determination circuit 130 operates the safety device unit 200 according to the position and degree of impact. This is expected to reduce the damage caused by the collision.

The collision detection device 1 of the present disclosure includes an airbag that operates inside the vehicle, an airbag that operates outside the vehicle, and an automatic braking operation, as the operation of the safety device unit 200 as an example of the operating unit when the vehicle is running. Operate either the automatic steering wheel operation or the alarm. As a result, not only the collision but also the spread of damage when the vehicle comes into contact with something is reduced.

The collision detection device 1 of the present disclosure has a plurality of airbags that operate with respect to the outside of the vehicle, and the operating airbag is selected based on the traveling speed of the vehicle and the measurement information. As a result, it is possible to operate the airbag that operates on the outside of the vehicle for protection such as pedestrians and bicycles, judging from the position and magnitude of the impact force and the vehicle speed. Airbags that operate on the outside of the vehicle are economical because they can be operated only at appropriate locations from among a plurality of equipped airbags. Whether or not to use the vehicle speed as a determination material may have a switching device that can be set according to the intention of the vehicle owner.

In the collision detection device 1 of the present disclosure, the operation of the safety device unit 200 when the vehicle is stopped is one of activation of the monitoring device, operation of the alarm, and notification to the vehicle owner. As a result, the state of the collision can be recorded by, for example, a surveillance camera. In addition, a horn, a buzzer, or the like can notify the driver that there has been a contact as well as a collision. Furthermore, by sending an e-mail to a mobile phone or notifying a smartphone, if a person other than the vehicle owner is driving and a collision occurs, the vehicle owner can quickly respond.

In the collision detection device 1 of the present disclosure, the pressure sensor 110 extends in a first direction, has a plurality of elastic first electrodes 112, and a plurality of second electrodes extending in a second direction intersecting the first direction. The drive circuit 120 includes one of a plurality of first electrodes 112 and a plurality of second electrodes 115, and has a plurality of dielectrics 114 provided on the surfaces of the plurality of second electrodes 115. The pressure distribution is obtained by measuring the capacitance between the two. As a result, the sensor unit that measures the capacitance can be made into a matrix structure, and the position and degree of impact can be detected with high accuracy.

In the collision detection device 1 of the present disclosure, the pressure sensor 110 has a plurality of elastic first electrodes 112 and a plurality of second electrodes provided at opposite positions of the plurality of second electrodes 115, respectively. It has 115 and a plurality of dielectrics 114 provided on the respective surfaces of the plurality of second electrodes 115, and the drive circuit 120 is one of the plurality of first electrodes 112 provided at positions facing each other. The pressure distribution is acquired by measuring the capacitance between the one and one of the plurality of second electrodes 115, whereby the sensor unit for measuring the capacitance can have a matrix structure, and the impact can be obtained. The position and degree can be detected accurately.

In the collision detection device 1 of the present disclosure, the pressure sensor 110 includes a plurality of first electrodes 112, a plurality of second electrodes 115 provided at positions facing the plurality of first electrodes 112, and a plurality of second electrodes. It has a plurality of dielectrics 114 provided on the respective surfaces of the two electrodes 115, and the drive circuit 120 includes one of the plurality of first electrodes 112 and the plurality of second electrodes provided at positions facing each other. The pressure distribution is obtained by measuring the capacitance between one of the electrodes 115, and at least one of the first electrode 112 and the second electrode 115 is flexible. Thereby, the pressure sensor 110 can be arranged even when the surface on which the second electrode 115 covered with the dielectric 114 is arranged is curved.

The vehicle of the present disclosure includes the above-mentioned collision detection device.

(Embodiment 2)
1. 1. Configuration 1.1 Overall Configuration FIGS. 16 and 17 are schematic views showing the pressure sensor 110 and the drive circuit 120 according to the second embodiment of the present disclosure. In the pressure sensor 110 of the present embodiment, the second electrode 115 covered with the dielectric 114 is sandwiched between the first electrode 112 on the protective cover 111 side and the first electrode 113 on the vehicle body 400 side. It is composed. The first electrode 112 and the first electrode 113 may be selected from the same range as the range of the constituent materials described in the first embodiment. The first electrode 112 and the first electrode 113 are preferably made of conductive rubber, and preferably have a sheet shape. The conductive rubber may be a conductive rubber made of the same constituent material as the constituent material described in the first embodiment. The dielectric 114 and the second electrode 115 may be selected from the same range as the range of the constituent materials described in the first embodiment.

1.2 Configuration of Drive Circuit 120 In the drive circuit 120, the wiring drawn from the first electrode 112, the wiring drawn from the second electrode 115, and the first electrode 113 have terminals T1 and T2, respectively. And are electrically connected via the terminal T5. From the viewpoint of stabilizing the pressing force detection by reducing the influence of noise, among the wirings drawn from the first electrode 112, the first electrode 112 and the first electrode 113 that are not involved in the measurement of capacitance. It is preferable that the wiring drawn from the drive circuit 120 has a ground potential of the drive circuit 120. The drive circuit 120 has the same configuration as the drive circuit 120 of the first embodiment except for the above items.

In the pressure sensor 110 of the present embodiment, the pressing force can be measured by measuring the change in capacitance between various combinations of terminals. For example, a group consisting of a change in capacitance between terminal T1 and terminal T5, a change in capacitance between terminal T1 and terminal T2, and a change in capacitance between terminal T2 and terminal T5. The pressing force can be measured by measuring one or more changes selected from.

From the viewpoint of improving pressure sensitivity, two or more changes selected from the above group, preferably the change in capacitance between terminal T1 and terminal T2 and the capacitance between terminal T2 and terminal T5. It is preferable to measure the pressing force by measuring the change in.

2. 2. Effects, etc. In the pressure sensor 110 of the present embodiment, by using the first electrodes 112 and the first electrodes 113 having different elastic moduli (Young's modulus), the measurement range of the pressing force can be further expanded. Can be widened. For example, when the elastic modulus of the first electrode 112 is relatively low and the elastic modulus of the first electrode 113 is relatively high, after the first electrode 112 is crushed as shown in FIG. 17, the first electrode 113 Is deformed, so that the measurement range of the pressing force is further widened.

Also in the pressure sensor 110 of the present embodiment, the pressing force is measured by measuring the change in capacitance between the terminals based on the change in the area of the contact region without deforming the dielectric 114. With a relatively simple configuration, it is possible to measure a relatively wide range of pressing force.

In the pressure sensor 110 of the present embodiment, since the two first electrodes 112 and 113 are used, the influence of noise is small and the pressing force can be stably detected.

(Embodiment 3)
1. 1. Configuration of Pressure Sensor 110 FIGS. 18 and 19 are schematic views showing the configuration of the pressure sensor according to the third embodiment. As shown in FIG. 18, the first electrode 112 in the present embodiment is formed in an annular shape at a position facing the second electrode 115, and both ends of the first electrode 112 face the same direction. It is configured as follows. Further, the second electrode 115 in the present embodiment is not composed of members continuous in the left-right direction, but has an independent substantially square shape for each position facing the first electrode 112.

The first electrode 112, the second electrode 115, and the dielectric 114 may be selected from the same range as the range of the constituent materials described in the first embodiment. The first electrode 112 is preferably made of conductive rubber and preferably has a sheet shape. The conductive rubber may be a conductive rubber made of the same constituent material as the constituent material described in the first embodiment.

One end of the first electrode 112 in the present embodiment may be terminated or may be electrically connected to the other end. One end of the first electrode 112 is connected to the drive circuit 120.

2. 2. Effect, etc. In the pressure sensor 110 according to the present embodiment, as shown by the dotted lines in FIGS. 19 and 18, the range in which the dielectric 114 covering the first electrode 112 comes into contact with the second electrode 115 is implemented. Since it is larger than the case of the first embodiment and the second embodiment, the capacitance can be measured with higher sensitivity than the case of the first embodiment and the second embodiment.

(Embodiment 4)
1. 1. Configuration 1.1 Overall Configuration FIGS. 20 and 21 are schematic views showing the pressure sensor 110 and the drive circuit 120 according to the fourth embodiment of the present disclosure. The pressure sensor 110 of the present embodiment has a configuration in which the second electrode 115 covered with the dielectric 114 is sandwiched between the first electrode 112 on the protective cover 111 side and the protective cover 116. The electrode 112 may be selected from the same range as the range of the constituent materials described in the first embodiment. The electrode 112 is preferably made of conductive rubber and preferably has a sheet shape. The conductive rubber may be a conductive rubber made of the same constituent material as the constituent material described in the first embodiment. The dielectric 114 may be selected from the same range as the range of the constituent materials described in the first embodiment. The protective cover 116 may be selected from the same constituent materials as the constituent materials of the protective cover 111 described in the first embodiment.

1.2 Configuration of Drive Circuit 120 In the drive circuit 120, the wiring drawn from the first electrode 112 and the wiring drawn from the second electrode 115 are electrically connected via terminals T1 and T2, respectively. ing. From the viewpoint of stabilizing the pressing force detection by reducing the influence of noise, among the wiring drawn from the first electrode 112, the wiring drawn from the first electrode 112 that is not involved in the measurement of capacitance is , It is preferable to use the ground potential of the drive circuit 120. The drive circuit 120 has the same configuration as the drive circuit 120 of the first embodiment except for the above items.

In the pressure sensor 110 of the present embodiment, the pressing force can be measured by measuring the change in capacitance between the terminal T1 and the terminal T2.

2. 2. Effects, etc. In the pressure sensor 110 of the present embodiment, by providing the protective cover 116 between the pressure sensor 110 and the vehicle body 400, it is possible to prevent the dielectric 114 from being worn and increase the reliability.

(Other embodiments)
As described above, the first embodiment has been described as an example of the technology disclosed in the present application. However, the technique in the present disclosure is not limited to this, and can be applied to embodiments in which changes, replacements, additions, omissions, etc. are made as appropriate. It is also possible to combine the components described in the first embodiment to form a new embodiment. Therefore, other embodiments will be illustrated below.

In the first embodiment and the second embodiment, at least one of the first electrode 112, the first electrode 113, and the second electrode 115 may be flexible. When a pressing force is applied to the pressure sensor 110, the capacitance can be measured by changing the contact area between the first electrode 112 or the first electrode 113 and the dielectric 114.

The flexible electrode may be grounded. This makes the pressure sensor resistant to noise. The flexible electrode is not limited to the conductive rubber, and may have a conductor layer formed on the surface of the sponge. The flexible electrodes may be connected to each other. By using the flexible electrode, the pressure sensor 110 can be easily arranged according to the curved surface of the vehicle body.

It is preferable to use a conductor or an insulator for the protective cover 111.

The size of one pressure sensor 110 is preferably, for example, 5 mm × 5 mm to 5 cm × 5 cm in length and width, and 1 to 2 mm in thickness.

The pressure sensor 110 may be arranged on the upper surface of the vehicle, for example, the bonnet or the ceiling.

The pressure sensor 110 can be configured to detect, for example, a force as much as a finger touch. The pressure sensor 110 may be constantly operated (energized), or as an alternative, a proximity sensor or the like may be used in combination and may be operated only when an object approaches.

The pressure sensor 110 may be combined with another sensor (such as a camera) to improve the accuracy of collision detection.

The accuracy of collision detection may be improved by referring to a time-series signal indicating a change in pressure immediately after a collision.

A pressure sensor 110 is provided on the upper surface of the vehicle, and when an even force is continuously applied to these pressure sensors 110, it is determined that there is "a large amount of snow" and the user is notified by e-mail or the like. The heater may be operated.

In the above embodiment, a collision detection device attached to a vehicle has been described as an example of the pressure sensitive device. However, the ideas of the present disclosure can also be applied to other types of pressure sensitive devices. For example, the present disclosure can be applied as a contact detection device or the like to a moving body such as a stroller or a large-sized transport device.

As described above, an embodiment has been described as an example of the technique in the present disclosure. To that end, the accompanying drawings and detailed description are provided. Therefore, among the components described in the attached drawings and the detailed description, not only the components essential for solving the problem but also the components not essential for solving the problem in order to exemplify the above technology. Can also be included. Therefore, the fact that these non-essential components are described in the accompanying drawings or detailed description should not immediately determine that those non-essential components are essential.

Further, since the above-described embodiment is for exemplifying the technique in the present disclosure, various changes, replacements, additions, omissions, etc. can be made within the scope of claims or the equivalent thereof.

The present disclosure is applicable to a pressure sensitive device including a pressure sensor. Specifically, the present disclosure is applicable to a collision detection device or the like attached to a vehicle.

1 Collision detection device 110 Pressure sensor 120 Drive circuit 130 Judgment circuit 140 Storage circuit 210 Safety device

Claims (9)

The pressure-sensitive part provided on the surface of the vehicle and
A measuring unit that acquires the pressure distribution received by the pressure-sensitive unit, and
A recording unit that records the measurement information of the measurement unit along with the change over time is provided.
Pressure sensitive device. A moving unit that operates based on the measurement information measured by the measuring unit is provided.
The pressure sensitive device according to claim 1. The operation of the moving unit when the vehicle is running is
Actuation of airbags that operate against the inside of the vehicle,
Operation of airbags that operate against the outside of the vehicle,
One of automatic braking operation, automatic steering wheel operation, and alarm activation,
The pressure sensitive device according to claim 2. It has a plurality of airbags that operate against the outside of the vehicle,
Based on the traveling speed of the vehicle and the measurement information
The working airbag is selected,
The pressure sensitive device according to claim 3. The operation of the moving unit when the vehicle is stopped is
Either activate the monitoring device, activate the alarm, or notify the vehicle owner,
The pressure sensitive device according to claim 2. The pressure sensitive part
A plurality of first electrodes extending in the first direction and having elasticity,
A plurality of second electrodes extending in a second direction intersecting the first direction,
It has a plurality of dielectrics provided on the surface of the plurality of second electrodes.
The measuring unit acquires a pressure distribution by measuring the capacitance between one of the plurality of first electrodes and one of the plurality of second electrodes.
The pressure sensitive device according to claim 1 or 2. The pressure sensitive part
With a plurality of elastic first electrodes,
A plurality of second electrodes provided at opposite positions of the plurality of first electrodes, and a plurality of second electrodes.
A plurality of dielectrics provided on the respective surfaces of the plurality of second electrodes, and
Have,
The measuring unit acquires a pressure distribution by measuring the capacitance between one of the plurality of first electrodes provided at positions facing each other and one of the plurality of second electrodes.
The pressure sensitive device according to claim 1 or 2. The pressure sensitive part
With multiple first electrodes,
A plurality of second electrodes provided at positions facing the plurality of first electrodes,
A plurality of dielectrics provided on the respective surfaces of the plurality of second electrodes, and
Have,
The measuring unit acquires a pressure distribution by measuring the capacitance between one of the plurality of first electrodes provided at positions facing each other and one of the plurality of second electrodes.
At least one of the first electrode and the second electrode is flexible.
The pressure sensitive device according to claim 1 or 2. A vehicle provided with the pressure sensitive device according to any one of claims 1 to 8.

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