Denso Corporation

Toyota Jidosha Kabushiki Kaisha

Fuji Jukogyo Kabushiki Kaisha

Denso Corpora Tion

Takatoshi Tanabe

Hisashi Takahashi

Daisuke Nakane

Hiroyuki Takahashi

Tomokazu Yoshida

Naoya Higashimachi

Sotaro Narita

Yukihiro Saitoh

Satoshi Goshima

Kazuhisa Hashimoto

Asei Wakabayashi

Kota Amano

Kouta Amano

Tomoya Shimizu

In a collision detection device for a vehicle, the bumper absorber includes general parts and holding parts alternately in a lengthwise direction of the groove portion. In each of the general parts, a predetermined clearance is formed between an inner wall surface of the groove portion on at least one side of vehicle up and down sides, and the detection tube member. Each of the holding parts is in contact with a surface of the detection tube member on at least one side of vehicle up and down sides, and vehicle front and rear sides to hold the detection tube member. A holding part ratio, which is a ratio of a part of the detection tube member held by the holding parts to a unit length of the detection tube member, is set to be smaller than a predetermined value.

Collision detection device for vehicle

A vehicle collision sensor includes a piezoelectric polymer film that includes a piezoelectric element deformed to generate an output voltage, and a pair of electrodes clamping the piezoelectric element from both its surfaces, at least one of the electrodes including divided pieces away from each other in a state where the at least one of the electrodes is joined to the piezoelectric element, and a conductive component that is clamped between the film and a bumper cover, which is provided on a front portion of a vehicle, or that is clamped between a fastening component, which attaches the film to the bumper cover, and the film, in a state where the film is attached to an inner surface of the bumper cover, so that the conductive component connects together the divided pieces from a side of the divided pieces, which is not joined to the piezoelectric element.

Vehicle collision sensor and vehicle collision detection device using same

A collision detection device for a vehicle includes: a bumper absorber disposed on a front side of a bumper reinforcement in a bumper of the vehicle; a detection tube component mounted in a groove portion defined in the bumper absorber to extend in a width direction of the vehicle, a hollow part being defined in the detection tube component; and a pressure sensor that detects a pressure in the hollow part of the detection tube component, and detects a collision of an object to the bumper based on a pressure detection result by the pressure sensor. The detection tube component is mounted in the groove portion in a state where the detection tube component has at least one or more cove curve portions curved in an up-down direction of the vehicle.

A collision detection device includes a chamber member, a pressure sensor, a collision detection ECU, and a projecting portion. The chamber member is disposed on a vehicle-front side of a bumper reinforcement in a bumper cover and includes a chamber main body having therein a hollow portion. The pressure sensor detects pressure in the hollow portion of the chamber main body. A clearance is formed between the chamber member and a front surface of the bumper reinforcement at least on a part of a rear surface of the chamber main body. The collision detection ECU detects a collision of an object with the bumper cover based on a pressure detection result by the pressure sensor. The projecting portion is provided to project from the rear surface of the chamber main body, and an end of the projecting portion is in contact with the front surface of the bumper reinforcement.

A collision detection device which can determine in a short time a collision to each portion of a chamber member in the longitudinal direction thereof and which is highly reliable. A collision determination system () is provided with: a chamber member () which is disposed with the longitudinal direction thereof aligned with the vehicle width direction, has a pressure chamber () formed therein, and is provided forward of bumper reinforcement (); a pair of pressure sensors () which is provided to the chamber member () at positions spaced from each other in the longitudinal direction thereof and outputs a signal corresponding to a variation in the pressure within the pressure chamber (); and a collision determination ECU (). The ECU () determines that a collision has occurred if the value of detection by either of the pair of pressure sensors () is greater than a first threshold value and, at the same time, the value of detection by the other of the pair is greater than a second threshold value which is set to be greater than the first threshold value.

Collision detection device

A collision detecting device and a collision detecting method are provided that enable accurate detection of a collision based on pressure change in a pressure chamber. A collision body discriminating system () is provided with: a chamber member () elongated in the vehicle width direction, having a pressure chamber () therein and provided in front of a bumper reinforcement (); an absorber () elongated in the vehicle width direction and provided in front of the bumper reinforcement (); a pressure sensor () for outputting a signal corresponding to a change in the pressure in the pressure chamber (); and an ECU () for discriminating a collision body on the basis of a signal from the pressure sensor (). The chamber member () and the absorber () are arranged in a vertical relationship with a gap (C) therebetween, and this allows the chamber member () and the absorber () to deform independently of each other when the collision body collides with the vehicle.

Collision detecting device and collision detecting method

A collision detector includes a chamber, a pressure sensor, and a bumper absorber. The chamber defines a hollow space, and the pressure sensor detects a pressure in the hollow space. The bumper absorber absorbs impact caused by a collision of an object with a vehicle, and covers an outer periphery of the chamber. The chamber and the bumper absorber are interposed with a gap in an entire width of the vehicle. In case of collision, the chamber is not bound by the bumper absorber deformed by the impact of the collision, thereby enabling an accurate detection of the collision of the vehicle with the object.

Collision detection apparatus and method for same

A collision detecting system includes a bumper reinforcement member, a crush box disposed between the bumper reinforcement member and a fixing member of the vehicle, a strain inducing member fixed to the crush box so as to distort in a longitudinal direction of the vehicle as the crush box is compressed between the reinforcement member and the fixing member and a strain measuring element fixed to the strain inducing member. The strain inducing member has a strain measuring portion having such a shape that stress of the strain inducing member concentrates into the strain measuring portion. The strain measuring element is fixed to the strain measuring portion to measure a component of the strain of the strain measuring portion in the longitudinal direction of the vehicle. The strain measuring portion has an asymmetrical cross-section in a vertical direction of the vehicle.

Vehicle collision detecting system

A collision detecting device includes a chamber member providing a chamber, a pressure sensor connected to the chamber member, and a bumper absorber absorbing an impact generated by collision of an object with the vehicle. The bumper absorber has a region, which has a thickness in a front-rear direction of the vehicle. The thickness of the region is equal to or smaller than a predetermined thickness. The region is in contact with at least a portion of the chamber member. The collision is detected based on the pressure of the chamber detected by the pressure sensor. Hereby, a collision detecting device in which the bumper absorber has sufficient rigidity, and the chamber has sufficient deformability in case of collision can be obtained.

Collision detecting device

A collision detection apparatus includes (i) a bumper reinforcement, (ii) a side supporting member as a side member or a crash box, (iii) a deforming body, and (iv) a strain detecting device. In this collision detection apparatus, frictional force exerted on the interface between the deforming body and the bumper reinforcement or the side supporting member is increased. In the collision detection apparatus, degradation in the detection accuracy of a strain detecting device is suppressed.

Collision detection apparatus and protection system

A collision detecting device includes a chamber member providing a space, a pressure sensor for detecting a pressure inside the space, a determination means, a bumper absorber for absorbing an impact generated by collision and a temperature sensor for detecting a temperature of the chamber member. Hardness of the chamber member changes with temperature. Thus, the deformation degree of the chamber member is different depending on temperature. However, the determination means corrects the pressure detected by the pressure sensor based on the temperature detected by the temperature sensor, and determines collision based on the corrected pressure. Therefore, a collision detecting device which can determine collision of an object with a vehicle accurately without being affected by the change of temperature can be obtained.

A walker collision detector includes a chamber member and a pressure sensor. The chamber member defines a chamber. On a back side of the chamber member, a concave portion for housing the pressure sensor is formed. The pressure sensor is connected to the chamber member for detecting the pressure in the chamber. The pressure sensor in a housed condition in the concave portion is connected to the chamber member, and is fixed on a front face of a bumper reinforcement. Therefore, a pressure sensor arrangement space conventionally required for installing the pressure sensor is not required, and cutting work or the like of the bumper reinforcement is not required. As a result, the walker collision detector has an improved installability on a vehicle.

Collision detector

A system for detecting objects colliding with an automotive vehicle includes a bumper-reinforcing member disposed behind a front bumper, a supporting member disposed behind the bumper-reinforcing member, forming a small gap therebetween, and a load sensor disposed between the bumper-reinforcing member and the supporting member in an overlapped manner. A load caused by a collision and detected by the load sensor is fed to an electronic controller that determines whether the object colliding with the vehicle is a pedestrian or other objects. Since the load sensor is mounted in a manner overlapping with the bumper-reinforcing member and the supporting member, an increase in a longitudinal length of a bumper structure by installing the load sensor is minimized. The load sensor may include plural detecting plates, each having a strain gage mounted thereon.

System for detecting objects colliding with automotive vehicle

A collision detector for a vehicle that defines a width direction is disclosed. The collision detector includes a back plate for coupling to the vehicle. The collision detector also includes a plurality of chamber members coupled to the back plate. Each of the chamber members defines a chamber space therein. Also, the collision detector includes a pressure sensor for detecting pressure in at least one of the chamber spaces to thereby detect collision of the vehicle. The chamber members are provided across the width of the vehicle.

A collision detection apparatus has a support member which is fixed to side members of a vehicle, an absorber which is arranged at a vehicle front side of the support member to define a space therebetween, a chamber member defining therein a chamber space which is substantially sealed, and a pressure sensor for detecting a pressure in the chamber space. The chamber member is arranged in the space defined between the absorber and the support member. A collision of the vehicle is detected based on a variation in the pressure of the chamber space.

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Ichinomiya, Japan

Takatoshi Tanabe