CN101363761B - Sensor assembly - Google Patents
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- CN101363761B CN101363761B CN2008101449366A CN200810144936A CN101363761B CN 101363761 B CN101363761 B CN 101363761B CN 2008101449366 A CN2008101449366 A CN 2008101449366A CN 200810144936 A CN200810144936 A CN 200810144936A CN 101363761 B CN101363761 B CN 101363761B
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Abstract
A sensor assembly includes a elongate article (13) and a plurality of elongate piezoelectric elements (47, 48) provided to the elongate article. Each of the piezoelectric elements is configured so that when a load is applied in a direction perpendicular to a surface of the piezoelectric element, a short axis (XS) direction of the piezoelectric element becomes a sensitivity direction in which a voltage is generated, and a major axis (XL) direction becomes a non-sensitivity direction in which a voltage is not generated.
Description
Technical field
The present invention relates to sensor assembling body, this sensor assembling body has a plurality of piezoelectric elements that are arranged on the long elements, when with the direction of the surperficial quadrature of this piezoelectric element on during used load, this piezoelectric element output electric signal corresponding with this load.
Background technology
In sensor assembling body, comprise sensor element with optical fiber as the sensor element of the deflection that is used to detect vehicle body.Optical fiber is clamped between buffering strengthening part and the impact-absorbing shell.
For example, in TOHKEMY 2005-263038 communique, disclose the pedestrian detection device of following formation, when having under the situation of load in effect on the impact-absorbing shell, load is delivered to optical fiber via impact-absorbing shell, and optical fiber is distortion under the effect of transmitting the load of coming.Because fibre strain causes changing through the light quantity in the optical fiber, detects vehicle collision pedestrian's situation in the light quantity that is based on variation.
But in TOHKEMY 2005-263038 number pick-up unit, in order to detect the collision with the pedestrian exactly, the load in the time of must making optical fiber with collision is distortion suitably accordingly.
If the loading during collision, thinks then that the load of effect makes the position distortion of the stray fiber in the impact-absorbing shell at the position of stray fiber.
When the position of above-mentioned distortion and buffering strengthening part butt, load is directly delivered to the buffering strengthening part from impact-absorbing shell, and load can not be delivered to optical fiber expeditiously.Load when the load when therefore, being difficult to make optical fiber (that is sensor element) with collision is out of shape with collision detection accurately accordingly suitably.
Summary of the invention
The sensor assembling body of the load when the purpose of this invention is to provide collision detection accurately.
According to an aspect of the present invention; A kind of sensor assembling body is provided; This sensor assembling body has elongate articles and sensor element; This sensor element is made up of the piezoelectric element along at least 1 elongated shape of the length direction setting of this elongate articles; Said sensor element be configured to the direction of the face quadrature of this sensor element on effect when load is arranged, as the sensitive direction that produces voltage, be that length direction is as the non-sensitive direction that does not produce voltage with the short-axis direction of the sensor element of elongated shape with long axis direction.
When piezoelectric element during with respect to sensitive direction flexural deformation, just become the state that on short-axis direction effect has load, and the output electric signal.For with piezoelectric element test load input accurately, when with the direction of the face quadrature of piezoelectric element on used load and when pushing piezoelectric element, the preferred electric signal that produces because of this pushing that only detects.
Therefore, make the length direction of piezoelectric element consistent with non-sensitive direction.Therefore, though piezoelectric element with respect to length direction flexural deformation, piezoelectric element can be based on the distortion of length direction output electric signal yet.Thus, when with the direction of the face quadrature of piezoelectric element on used load and when pushing piezoelectric element, can only detect the electric signal that produces because of this pushing, thereby the load accurately during collision detection.
The sensor assembly preferably also has: the 1st parts, and said the 1st parts are compared the place ahead that is arranged on vehicle body with said sensor element, and have the loading transfer portion (36,37) that bloats to said sensor element; The 2nd parts, said the 2nd component configuration is used to support said sensor element between said the 1st parts and said vehicle body; Relatively said the 1st parts and said the 2nd parts are positioned on above-below direction through the location division, said thus loading transfer portion is relative with said sensor element.
Therefore, when for example the loading when collision was on the 1st parts, even the position distortion that has departed from sensor element in the 1st parts, the load of effect also can be delivered to sensor element from loading transfer portion expeditiously.Thus, can make the load distortion suitably accordingly in sensor element and when collision, with collision detection exactly.
Above-mentioned the 1st parts preferably have the installation portion that is installed on the said vehicle body, and said installation portion only is constituted as moving of direction that restriction separates with from said vehicle body to said the 1st parts.Therefore, can prevent that the 1st parts break away from from vehicle body by enough installation portions.On the other hand, when effect has the load in when collision on the 1st parts, the 1st parts are moved swimmingly towards vehicle body.Load when thus, the loading transfer portion of enough the 1st parts of ability will collide is delivered to sensor element reliably.
Said location division preferably has: be formed on a plurality of pilot holes on said the 2nd parts; Can be applied in a plurality of penetration portions in the said pilot hole, be applied in the said pilot hole, on above-below direction, relatively said the 1st parts and said the 2nd parts positioned through making said penetration portions.Therefore, can make the sensor element of the 2nd parts relative with loading transfer portion.Like this, through just penetration portions being applied in the simple operation in the pilot hole, just can make the sensor element of the 2nd parts relative with loading transfer portion.
The choosing of said loading transfer quality award from the ministry be arranged on said penetration portions above or below the position at least one position.Therefore, can with loading transfer portion be arranged on penetration portions near, thereby can loading transfer portion be arranged on respect to the sensor element more accurate location.Thus, can make loading transfer portion relative with sensor element more reliably.
The choosing of said loading transfer quality award from the ministry is installed to said the 1st parts a plurality of installation portions of said vehicle body and is arranged between the penetration portions of said the 1st parts being used for.Therefore, when loading during at the 1st parts, can enough installation portions and penetration portions stop loading transfer portion to depart from sensor element.Thus, can keep the relative state of loading transfer portion and sensor element, and can be more expeditiously load during with collision be delivered to sensor element from loading transfer portion.
Said loading transfer portion and said sensor element preferably are separately positioned on the top and the below of said penetration portions.Therefore, when effect has load on the 1st parts, can enough penetration portions loading transfer portion up and down likewise be directed to sensor element up and down.Through likewise guiding loading transfer portion up and down respectively, can utilize loading transfer portion up and down that each sensor element likewise is out of shape.Thus, can not receive the influence of the active position (input position) of load, detect the load that produces because of collision more accurately.
Said location division preferably is arranged between said installation portion and said the 2nd parts.Therefore, when the 1st parts are installed to vehicle body, can suppress the offset of vehicle body and the 1st parts 14 effectively, at length say, be that the 1st parts squint with respect to the 2nd position component.
Said sensor element preferably is made up of the piezoelectric membrane of PVDF system, and when said sensor element was arranged on the said elongate articles, the length direction of said sensor element was consistent with the length direction of said elongate articles.
When effect on the length direction at elongate articles had load, elongate articles was fulcrum (benchmark) flexural deformation with the both ends of elongate articles.Because elongate articles flexural deformation, the piezoelectric element that is arranged on the elongate articles also imitates elongate articles and flexural deformation.Therefore, if the sensitive direction of piezoelectric element is consistent with the length direction of elongate articles, just becomes and on the sensitive direction of piezoelectric element, act on the state that load is arranged, and export electric signal.Therefore, when with the direction of the face quadrature of piezoelectric element on used load and when pushing piezoelectric element, be difficult to only detect the electric signal that produces because of this pushing, thereby test load input accurately.
Therefore, when being arranged at piezoelectric element on the elongate articles, make the length direction (that is non-sensitive direction) of piezoelectric element consistent with the length direction of elongate articles.
Because the easy filmization of PVDF, so can realize slimming, the miniaturization that sensor is whole.
When being arranged at piezoelectric element on the elongate articles; As long as the length direction that makes piezoelectric element (promptly; Non-sensitive direction) consistent with the length direction of elongate articles, then when load with the direction of the face quadrature of piezoelectric element on when effect and pushing piezoelectric element, even the distortion of piezoelectric element and elongate articles flexural deformation accordingly; Also the electric signal that produces because of this pushing can be only detected, thereby the load that produces because of collision can be detected accurately.
Description of drawings
Fig. 1 is the stereographic map of the sensor assembling body of expression the 1st embodiment of the present invention.
Fig. 2 is the exploded perspective view that sensor shown in Figure 1 is assembled body.
Fig. 3 is the cut-open view along the 3-3 line of Fig. 1.
Fig. 4 is the exploded view of Fig. 3.
Fig. 5 A is the stereographic map of sensor element shown in Figure 2, and Fig. 5 B is the figure of the molecular configuration of the sensor element shown in the presentation graphs 5A.
Fig. 6 is illustrated in sensor shown in Figure 3 to assemble the figure that acts on the example that load is arranged on the 1st parts of body.
Fig. 7 A is the figure of expression to the state of sensor element unit imposed load shown in Figure 2, and Fig. 7 B is illustrated in the figure that acts on the state that load is arranged on the upper sensor element shown in Fig. 7 A.
Fig. 8 is the cut-open view of the sensor assembling body of the 2nd embodiment.
Fig. 9 is the exploded view that sensor shown in Figure 8 is assembled body.
Figure 10 is the cut-open view of the sensor assembling body of the 3rd embodiment.
Figure 11 is an expression sensor assembling body exploded view shown in Figure 10.
Embodiment
Below, according to accompanying drawing several preferred embodiments of the present invention is carried out detailed explanation.
In the present embodiment, the example of sensor being assembled on the front bumper beam 13 that body 10 is assembled into vehicle is described, but the present invention also can be applicable to other elongate articles.
Fig. 1～Fig. 4 representes the sensor assembling body of the 1st embodiment.
According to Fig. 1 and Fig. 2, sensor assembling body 10 has: the front bumper beam 13 on the anterior bogie side frame 11,12 about being installed on; Be installed on the 1st parts 14 on the front bumper beam 13; Be configured in the 2nd parts 15 between the 1st parts 14 and the front bumper beam 13; Be supported in the sensor element unit 16 on the 2nd parts 15.
Each leading section 11a, the 12a of the anterior bogie side frame 11,12 about front bumper beam 13 is installed in are last, constitute the part of vehicle body 18.
In the antetheca 25 of front bumper beam 13, separate predetermined distance at the central portion of above-below direction and be formed with a plurality of patchholes 27.
In the antetheca 25 of front bumper beam 13, on top separate predetermined distance near the edge and be formed with a plurality of fastening holes 28 of going up.
In the antetheca 25 of front bumper beam 13, near lower limb, separate predetermined distance and be formed with a plurality of fastening holes 29 down.
The 1st parts 14 have: the beam housing 31 of the band shape of extending along the antetheca of front bumper beam 13 25; Be located at a plurality of penetration portions 33 on the back side 31a of beam housing 31; A plurality of installation portions 34,35 up and down; Loading transfer portion 36,37 up and down.
With reference to Fig. 3～Fig. 4 to penetration portions 33, up and down installation portion 34,35 and up and down loading transfer portion 36,37 be elaborated.
The 2nd parts 15 are folded between the 1st parts 14 and the front bumper beam 13, are the strip-shaped members along antetheca 25 extensions of front bumper beam 13.The 2nd parts 15 for example use double sticky tape (not shown) bonded (supporting) on the antetheca 25 of front bumper beam 13.In the 2nd parts 15, separate predetermined distance at the central portion of above-below direction and be formed with a plurality of pilot holes 41.The 2nd parts 15 have: the last protrusion tab 42 of coboundary; The following protrusion tab 43 of lower limb; At upper and lower protrusion tab 42, sensor carrying plane 44 between 43.Last protrusion tab 42 is outstanding to vehicle body the place ahead from coboundary.Following protrusion tab 43 is outstanding to vehicle body the place ahead from lower limb.Sensor carrying plane 44 is faces of supporting sensor cell 16.
With reference to Fig. 3～Fig. 4 pilot hole 41 is elaborated.
Central portion at the above-below direction of lamination 46 separates predetermined distance and is formed with a plurality of embedded holes 51.
Sensor element the 47, the 48th up and down, the element of the band shape of extending in the horizontal (elongated shape).
This sensor element unit 16 for example uses double sticky tape (not shown) bonded (supporting) on the sensor carrying plane 44 of the 2nd parts 15, thereby is arranged on the front bumper beam 13 across the 2nd parts 15.
With reference to Fig. 3 and Fig. 4, the above-below direction centre at the surperficial 15b of the 2nd parts 15 separates predetermined distance and is formed with a plurality of projections 53 (also with reference to Fig. 2), on these projections 53, is formed with pilot hole 41 respectively.A plurality of pilot holes 41 are through holes.
In the sensor element unit 16, the height dimension of lamination 46 is configured to H2.The height dimension H2 of lamination 46 sets to such an extent that the height dimension H1 of ratio sensor carrying plane 44 is slightly little.
Near the coboundary 46a of lamination 46, be embedded with upper sensor element 47.Upper sensor element 47 is arranged on the upside of comparing with penetration portions 33.
Near the lower limb 46b of lamination 46, be embedded with lower sensor element 48.Lower sensor element 48 is arranged on the downside of comparing with penetration portions 33.
As sensor element 47,48 up and down, use piezoelectric membrane.That is, sensor element the 47, the 48th up and down, when with the direction of the face quadrature of each sensor element 47,48 on generation strain and export the element of electric signal accordingly during input (effect) load with the dependent variable that is produced (load of input).
About sensor element 47,48 up and down, be elaborated for example with reference to Fig. 5 A and the above sensor element 47 of Fig. 5 B.
The 1st parts 14 are arranged on the vehicle body front side of comparing with sensor element unit 16.
The last installation portion 34 of the 1st parts 14 is near the fastening parts of the elastically deformable that extends to the vehicle body rear coboundary 31b in the 31a of the back side of beam housing 31.
The following installation portion 35 of the 1st parts 14 is and last installation portion 34 laterally zygomorphic parts each to be constituted the position use identical Reference numeral and omit explanation.Fastening pawl 56 fastenings of following installation portion 35 are at the circumference in the following fastening hole 29 of front bumper beam 13.
The last load transfer part 36 of the 1st parts 14 is formed on the back side 31a of beam housing 31 and is positioned near the below of installation portion 34, and forms continuously to right-hand member 31e (with reference to Fig. 2) from the left end 31d of beam housing 31.
Should go up load transfer part 36 is bellyings that (that is, towards upper sensor element 47) bloats towards the vehicle body rear, and it is arranged on the top of penetration portions 33.Say that at length last load transfer part 36 is between last installation portion 34 and penetration portions 33.
The following load transfer part 37 of the 1st parts 14 is and last load transfer part 36 laterally zygomorphic parts to be set at the below of penetration portions 33.Say that at length following load transfer part 37 is down between installation portion 35 and the penetration portions 33.
Therefore, even at the 1st parts 14 imposed loads, also can stop loading transfer portion 36,37 up and down to depart from sensor element 47,48 up and down through installation portion 34,35 up and down and penetration portions 33.
Below, the position that respectively constitutes of following load transfer part 37 is used the Reference numeral identical with the formation position of last load transfer part 36 and omitted explanation.
The penetration portions 33 of the 1st parts 14 is the columned teats that in the 31a of the back side of beam housing 31, extend to the vehicle body rear from the central portion of above-below direction.Penetration portions 33 can run through the pilot hole 41 of the 2nd parts 15, and can run through the patchhole 27 of front bumper beam 13.
Through making penetration portions 33 run through pilot hole 41, can enough location divisions 30 relatively be located on above-below direction by the 1st parts 14 and the 2nd parts 15.Thus, the bearing surface 36a of last load transfer part 36 is relative with upper sensor element 47, and the bearing surface 37a of following load transfer part 37 is relative with lower sensor element 48.
Just, the pilot hole 41 of the penetration portions 33 of the 1st parts 14 and the 2nd parts 15 is configured for location division 30 that up and down loading transfer portion 36,37 and sensor element up and down 47,48 are positioned.
Next, the assembling sequence of sensor assembling body 10 is described with reference to Fig. 3 and Fig. 4.
At first, with double sticky tape (not shown) sensor element unit 16 is bonded in the sensor carrying plane 44 of the 2nd parts 15.
Next, with double sticky tape (not shown) the 2nd parts 15 are bonded in the antetheca 25 of front bumper beam 13.
Then, the penetration portions 33 of the 1st parts 14 is applied in the patchhole 27 of pilot hole 41 and front bumper beam 13 of the 2nd parts 15.So loading transfer portion 36,37 up and down is connected to sensor element 47,48 up and down.
When penetration portions 33 being inserted in pilot hole 41 and the patchhole 27, respectively installation portion 34,35 up and down is inserted in the fastening hole 28,29 up and down of front bumper beam 13. Installation portion 34,35 up and down elastic deformation on one side is inserted in the fastening hole 28,29 up and down on one side, and the fastening pawl 56,56 of installation portion 34,35 up and down is by the circumference of fastening in fastening hole 28,29 up and down.And the 1st parts 14 are installed on the antetheca 25 of front bumper beam 13.At this moment, up and down bearing surface 36a, the 37a of loading transfer portion 36,37 is bonded on the sensor element unit 16 with double sticky tape or cementing agent (not shown).
Like this, fastening pawl 56,56 fastenings of the installation portion 34,35 through will be up and down are at the circumference in fastening hole 28,29 up and down, installation portion 34,35 up and down (the 1st parts 14 just) just can't from about fastening hole 28,29 deviate to the vehicle body front side.In contrast, up and down installation portion 34,35 is unrestricted to moving of vehicle body rear side.Therefore, the mobile of direction from front bumper beam 13 to the 1st parts 14 that just separate with of up and down installation portion 34,35 is limited.
According to such structure; Loading during collision is when the 1st parts 14; Pass through the load that acted on, the 1st parts 14 move to vehicle body 18 swimmingly, and the loading transfer can will collide reliably by loading transfer portion 36,37 up and down the time to about sensor element 47,48.
Fig. 5 A representes sensor element, and Fig. 5 B representes the molecular configuration of sensor element.
Sensor element the 47, the 48th up and down, identical sensor element, thereby only upper sensor element 47 is illustrated, omit explanation to lower sensor element 48.
As the upper sensor element 47 shown in Fig. 5 A, use common piezoelectric membrane.This piezoelectric membrane for example is PVDF (PVDF).Because the easy filmization of this PVDF is so can realize all slimmings of sensor, miniaturization.
Shown in Fig. 5 B, PVDF is at molecular configuration (CH
2CF
2-) on have the direction of easy deformation and the direction that is difficult to be out of shape.Just, PVDF has following characteristic, for to the distortion of the direction (d31 direction) of the minor axis XS of face and to the distortion of the direction (d33 direction) of face quadrature, produce the split pole that changes because of dipole moment.
Above-mentioned PVDF has following characteristic, is in the distortion of direction (d32 direction) of major axis XL at the length direction of face, because the symmetry of molecular configuration kept, so do not produce the split pole because of dipole moment.
That is, the direction of the minor axis XS of face (d31 direction) is above-mentioned " sensitive direction ", with the direction (d32 direction) of the major axis XL of this minor axis quadrature be above-mentioned " non-sensitive direction ".
Like this; Upper sensor element 47 with the direction (d33 direction) of face quadrature on when being applied load (compressing/pushing); Generation produces voltage (branch pole tension) because of the split pole that dipole moment changes, but this moment, if go up the effect tensile force at sensitive direction (d31 direction); Then produce the split pole that changes because of dipole moment and produce voltage (branch pole tension) (susceptibility is high); Even go up the effect tensile force in non-sensitive direction (d32 direction), also do not produce split pole, thereby do not produce voltage (branch pole tension) (susceptibility is low) because of dipole moment.
As shown in Figure 2, sensor element unit 16 is that overall width direction (that is left and right directions) goes up the long and short elongate articles of size on the above-below direction of size.Therefore, when the direction (d33) with the face quadrature of sensor element unit 16 goes up used load, with about the end be fulcrum (benchmark), flexural deformation on the length direction of sensor element unit 16.Below, the flexural deformation of the length direction of sensor element unit 16 is called as " length direction distortion ".
Through making sensor element unit 16 carry out the length direction distortion, end 47a, the 47b about upper sensor element 47 (with reference to Fig. 5 A) makes similarly carries out flexural deformation (length direction distortion).The upper sensor element 47 that has produced the length direction distortion is compared with the preceding upper sensor element 47 of distortion, and total length is elongated.That is, when upper sensor element 47 is out of shape in the longitudinal direction, just upper sensor element 47 is acted on the tensile force of non-sensitive direction.
On the other hand, sensor element unit 16 is formed the size weak point of above-below direction.Therefore, even go up used load in the direction (d33) with the face quadrature of sensor element unit 16, in the sensor element unit 16, edge 47c up and down, 47d also are difficult to flexural deformation on short-axis direction (short-axis direction distortion).That is, though with the direction of the face quadrature of sensor element unit 16 on used load, the upper sensor element 47 shown in Fig. 5 A also is difficult on above-below direction, be out of shape, thus tensile force does not act on the sensitive direction (d31).
At this, the load when making 47 collision detection of upper sensor element when with the pushing force compressing/pushing upper sensor element 47 of the directive effect of face quadrature the time, needs only to detect the electric signal by this compressing/pushing generation.
Therefore, make the length direction of the upper sensor element 47 shown in Fig. 5 A consistent with non-sensitive direction.Therefore, in the upper sensor element 47,, do not produce voltage yet, but on short-axis direction, during effect tensile force F2, produce voltage even act on tensile force F1 in the longitudinal direction.
But; As stated; Because upper sensor element 47 is difficult to distortion on short-axis direction; So its result does not produce tensile force on short-axis direction, thereby the electric signal that the compressing/pushing on the thickness direction of upper sensor element 47 produces can be only detected, thereby the load that produces by collision can be detected accurately.
Fig. 6 is illustrated in the example that effect on the 1st parts 14 of sensor assembling body of the 1st embodiment has load.
Load F3 from the vehicle body front side according to the directive effect of arrow on the 1st parts 14.Load F3 be with the face quadrature of up and down sensor element 47,48 act on the load on this face.
The bearing surface 37a of the bearing surface 36a of last load transfer part 36 and following load transfer part 37 is bonded in respectively on the sensor element unit 16.The part of load F3 is delivered to load transfer part 36 according to arrow A, and the remainder of load F3 is delivered to down load transfer part 37 according to arrow B.Therefore; Be passed to the loading of going up load transfer part 36 with the direction of the face quadrature of upper sensor element 47 on; Push upper sensor element 47 well; Likewise, the loading that is passed to following load transfer part 37 with the direction of the face quadrature of lower sensor element 48 on, push lower sensor element 48 well.Thus, load F3 acts on the sensor element 47,48 up and down expeditiously.
Therefore; When the load F3 in when collision acts on 14 last times of the 1st parts; Even the position distortion from the position deviation of up and down sensor element 47,48 in the 1st parts 14, the load F3 that is acted on also can be delivered to sensor element 47,48 up and down from loading transfer portion 36,37 up and down expeditiously.Just, up and down sensor element 47,48 and the load F3 in when collision is out of shape with collision detection exactly accordingly suitably.
When loading in 47,48 last times of sensor element up and down, for making this load concentration on this sensor element, preferred loading transfer portion 36,37 and sensor element up and down 47,48 up and down on above-below direction in a narrow margin.
Next, according to Fig. 7 A and Fig. 7 B, the state of used load on sensor element unit 16 is described.
In Fig. 7 A, when load F3 is applied to 16 last times of sensor element unit, shown in imaginary line, this sensor element unit 16 with about end 16a, 16b be that fulcrum (benchmark) is out of shape to the vehicle body rear.But, because the size of the above-below direction of sensor element unit 16 is short, so can be not that fulcrum (benchmark) is out of shape on short-axis direction to the vehicle body rear with edge 16c, 16d up and down.
Shown in Fig. 7 B, sensor element unit 16 with about end 16a, 16b be that fulcrum (benchmark) is out of shape along its length, thus upper sensor element 47 also with about end 47a, 47b be that benchmark is out of shape on long axis direction to the vehicle body rear.
The upper sensor element 47 that on long axis direction, is out of shape with the distortion before upper sensor element 47 compare, total length L is elongated.
In the upper sensor element 47, the length direction (that is non-sensitive direction) that makes upper sensor element 47 is consistent with the length direction as the sensor element unit 16 of elongate articles.Therefore, even the total length L of upper sensor element 47 is elongated, upper sensor element 47 does not produce voltage yet.Thus; Impact load acts on the direction with the face quadrature of upper sensor element 47, can detect the upwards pushing force of sensor element 47, the load when promptly colliding through 47 of upper sensor elements; And as electric signal output, thereby the load accurately during collision detection.
Fig. 8 and Fig. 9 represent the sensor assembling body of the 2nd embodiment.Component parts about identical with the sensor of the 1st embodiment assembling body 10 uses identical Reference numeral and omission explanation.
The sensor of the 2nd embodiment assembling body 70 has location division 71 and installation portion 72, and replacing location division 30 and the installation portion up and down 34,35 of Fig. 3 and the 1st embodiment shown in Figure 4, it is identical that other structures and the sensor of the 1st embodiment are assembled body 10.
The projection 53 of projection 74 and the 1st embodiment likewise is formed on the above-below direction central authorities of the surperficial 15b of the 2nd parts 15, and on length direction (overall width direction), separates predetermined distance ground and be formed with a plurality of.Pilot hole 75 forms with projection 74 coaxially.
Because penetration portions 76 is applied in the pilot hole 75, so can enough location divisions 71 relatively be located on above-below direction by the 1st parts 14 and the 2nd parts 15.Thus, the bearing surface 36a of last load transfer part 36 is relative with upper sensor element 47, and the bearing surface 37a of following load transfer part 37 is relative with lower sensor element 48.
Mounting hole 81 is formed on the above-below direction central portion of the 1st parts 14, and on vehicle-body width direction, separates predetermined distance and be formed with a plurality of.
Next, the assembling sequence to the sensor of the 2nd embodiment assembling body 70 describes.
At first, with double sticky tape (not shown) sensor element unit 16 is bonded on the sensor carrying plane 44 of the 2nd parts 15.
Then, with double sticky tape (not shown) the 2nd parts 15 are bonded on the antetheca 25 of front bumper beam 13.
Then, the penetration portions 76 of the 1st parts 14 is inserted in the patchhole 77 of pilot hole 75 and front bumper beam 13 of the 2nd parts 15.So, the bearing surface 36a of loading transfer portion 36,37 up and down, 37a and 47,48 butts of sensor element up and down.Penetration portions 76 is being inserted under the state in the pilot hole 75, bolt 82 is being inserted in the mounting hole 81.
At last, will screw togather from the threaded portion 82b and the nut 83 of the outstanding bolt 82 of mounting hole 81.Make the socket cap 82a of bolt 82 and the end difference 81a butt of mounting hole 81, the 1st parts 14 are installed on the antetheca 25 of front bumper beam 13 thus.At this moment, up and down bearing surface 36a, the 37a of loading transfer portion 36,37 is bonded on the sensor element unit 16 by double sticky tape or cementing agent (not shown).
Like this, the threaded portion 82b of bolt 82 and nut 83 screw togather.On this basis, the end difference 81a butt of the socket cap 82a of bolt 82 and mounting hole 81.Therefore, the 1st parts 14 can not move to the vehicle body front side.
According to the sensor of the 2nd embodiment assembling body 70, the penetration portions 76 of location division 71 is set between the projection 74 of socket cap 82a and the 2nd parts 15 of bolt 82.Therefore, sensor is assembled body 70 when vehicle body is installed, can suppress the offset between vehicle body and the 1st parts 14 effectively, at length say so and to suppress of the offset of the 1st parts 14 effectively with respect to the 2nd parts 15.
Figure 10 and Figure 11 represent the sensor assembling body of the 3rd embodiment.
The sensor assembling body 90 of the 3rd embodiment has location division 91 and installation portion 92, and with location division 30 and the installation portion up and down 34,35 that replaces the 1st embodiment shown in Figure 3, other structures are identical with the sensor assembling body 10 of the 1st embodiment.
A plurality of mounting holes 98 are that the above-below direction central portion at beam housing 31 separates predetermined distance and forms on the overall width direction.The aperture of the circumference of these mounting holes 98 is along with trend vehicle body rear dwindles successively, and wall 98a forms taper thus.
The projection 53 of projection 94 and the 1st embodiment likewise is formed on the above-below direction central authorities of the surperficial 15b of the 2nd parts 15, and on the overall width direction, separates predetermined distance ground and be formed with a plurality of.Pilot hole 95 forms with projection 94 coaxially.
When being inserted in bolt 96 in the mounting hole 98, the wall 98a butt of the countersunk head 96a of bolt 96 and the taper of mounting hole 98.The 1st parts 14 are located through countersunk head 96a by mounting hole 98.And, because bolt 96 is applied in the pilot hole 95, so a bottom 96b of bolt 96 is inserted in the pilot hole 95.The 2nd parts 15 are located through a bottom 96b by pilot hole 95.Like this, the 1st parts 14 and the 2nd parts 15 are relatively located on above-below direction through bolt 96.Thus, up and down bearing surface 36a, the 37a of loading transfer portion 36,37 is relative with sensor element up and down 47,48.
Next, the assembling sequence to the sensor of the 3rd embodiment assembling body 90 describes.
At first, with double sticky tape (not shown) sensor element unit 16 is bonded on the sensor carrying plane 44 of the 2nd parts 15.
Then, with double sticky tape (not shown) the 2nd parts 15 are bonded on the antetheca 25 of front bumper beam 13.
Afterwards, bolt 96 is inserted in the mounting hole 98 of the 1st parts 14.Run through the pilot hole 95 of the 2nd parts 15 from mounting hole 98 outstanding bolts 96, and run through the patchhole 97 of front bumper beam 13.Bottom 96b through with bolt 96 is inserted in the pilot hole 95, and bolt 96 is positioned with respect to the 2nd parts 15.
Screw togather from the threaded portion 96c and the nut 103 of the outstanding bolt 96 of patchhole 97.The wall 98a butt of the countersunk head 96a of bolt 96 and the taper of mounting hole 98 is located the 1st parts 14 thus, and is installed on the antetheca 25 of front bumper beam 13.
The bearing surface 36a of last load transfer part 36 is relative with upper sensor element 47, and the bearing surface 37a of following load transfer part 37 is relative with lower sensor element 48.
Under this state, the bearing surface 37a of the bearing surface 36a of last load transfer part 36 and following load transfer part 37 is bonded on the sensor element unit 16 by double sticky tape or cementing agent (not shown).Under this state, the countersunk head 96a of preferred bolt 96 and projection 94 butts.
The threaded portion 96b and the nut 103 of bolt 96 screw togather.The wall 98a butt of the countersunk head 96a of bolt 96 and the taper of mounting hole 98.Therefore, can prevent the 1st parts 14 moving to the vehicle body front side.
According to the sensor assembling body 90 of the 3rd embodiment, the penetration portions of location division 91 is mounted bolt 96 dual-purposes of portion 92, so need on the beam housing 31 of the 1st parts 14, not form the penetration portions of location usefulness, can make the shape of the 1st parts 14 succinct.
Like this, in the above-described embodiments, the example that the position up and down in penetration portions 33 is provided with loading transfer portion 36,37 up and down is illustrated, but also only any side in the position up and down of penetration portions 33 loading transfer portion is set.Under this situation, also can only sensor element be set at the position relative with loading transfer portion.
And, in the above-described embodiments, as up and down sensor element 47,48 illustrations piezoelectric membrane, but be not limited thereto, also can use other sensor elements.
And, in the above-described embodiments, as the elongate articles illustration front bumper beam 13, but be not limited thereto, also go for other positions such as rear bumper beam.In addition, also go for vehicle elongate articles in addition.
In the above-described embodiments, the example that only the 2nd parts 15 is bonded on the antetheca 25 of front bumper beam 13 with double sticky tape is illustrated, but is not limited thereto, also can on the basis of double sticky tape, re-use cementing agent, or only use cementing agent.
Sensor of the present invention assembling body is applicable to have and act on load on the sensor element and export the automobile of the piezoelectric element of electric signal accordingly.
Claims (8)
1. the sensor of the load when being used to detect vehicle collision assembling body is characterized in that having:
Elongate articles (13) as the front bumper beam;
Sensor element (47,48), said sensor element is made up of the piezoelectric element along at least 1 elongated shape of the length direction setting of this elongate articles;
The 1st parts (14), said the 1st parts are arranged on the said elongate articles, and compare the place ahead that is arranged on vehicle body (18) with said sensor element, and have the loading transfer portion (36,37) that bloats to said sensor element; With
The 2nd parts (15), said the 2nd component configuration and support said sensor element by front surface between said the 1st parts and said elongate articles,
Relatively said the 1st parts and said the 2nd parts are positioned on above-below direction through location division (30,71,91), said thus loading transfer portion is relative with said sensor element,
Said sensor element be configured to the direction of the face quadrature of this sensor element on effect when load is arranged; As the sensitive direction that produces voltage, is that length direction as the non-sensitive direction that do not produce voltage with long axis direction with the short-axis direction of the sensor element of elongated shape.
2. sensor assembling body as claimed in claim 1 is characterized in that,
Said the 1st parts have the installation portion (34,35,72,92) that is installed on the said elongate articles,
Said installation portion only is constituted as moving of direction that restriction separates with from said elongate articles to said the 1st parts.
3. sensor assembling body as claimed in claim 1 is characterized in that,
Said location division has:
Be formed on a plurality of pilot holes (41,75,95) on said the 2nd parts;
Can be applied in a plurality of penetration portions (33,82,96) in the said pilot hole,
Through said penetration portions is applied in the said pilot hole, on above-below direction, relatively said the 1st parts and said the 2nd parts are positioned.
4. sensor assembling body as claimed in claim 3 is characterized in that,
Said loading transfer portion be arranged on said penetration portions above or below the position at least one position.
5. sensor assembling body as claimed in claim 1 is characterized in that,
Said loading transfer portion is positioned at and is used for said the 1st parts are installed to a plurality of installation portions (34,35) of said elongate articles and are arranged between the penetration portions (33) of said the 1st parts.
6. sensor assembling body as claimed in claim 3 is characterized in that,
Said loading transfer portion and said sensor element are separately positioned on the top and the below of said penetration portions.
7. sensor assembling body as claimed in claim 2 is characterized in that,
Said location division is arranged between said installation portion and said the 2nd parts.
8. sensor assembling body as claimed in claim 1 is characterized in that,
Said sensor element is made up of the piezoelectric membrane of PVDF system, and when said sensor element was arranged on the said elongate articles, the length direction of said sensor element was consistent with the length direction of said elongate articles.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007207081A JP4904221B2 (en) | 2007-08-08 | 2007-08-08 | Sensor assembly |
| JP2007207047A JP4997017B2 (en) | 2007-08-08 | 2007-08-08 | Vehicle sensor assembly |
| JP2007-207081 | 2007-08-08 | ||
| JP2007207081 | 2007-08-08 | ||
| JP2007-207047 | 2007-08-08 | ||
| JP2007207047 | 2007-08-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101363761A CN101363761A (en) | 2009-02-11 |
| CN101363761B true CN101363761B (en) | 2012-09-05 |
Family
ID=40390252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101449366A Expired - Fee Related CN101363761B (en) | 2007-08-08 | 2008-08-07 | Sensor assembly |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4997017B2 (en) |
| CN (1) | CN101363761B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4991821B2 (en) * | 2009-10-15 | 2012-08-01 | 本田技研工業株式会社 | Bumper opening cover locking structure |
| JP5920228B2 (en) * | 2013-01-09 | 2016-05-18 | トヨタ自動車株式会社 | Bumper for vehicle equipped with pedestrian collision detection device |
| JP6369415B2 (en) * | 2015-07-28 | 2018-08-08 | 株式会社デンソー | Vehicle collision sensor and vehicle collision detection device using the same |
| JP6593647B2 (en) * | 2016-03-16 | 2019-10-23 | 株式会社デンソー | Vehicle collision detection device |
| CN106092482A (en) * | 2016-05-30 | 2016-11-09 | 环境保护部核与辐射安全中心 | A kind of shock loading test system and plane distribution formula induction installation thereof |
| CN106393110A (en) * | 2016-10-25 | 2017-02-15 | 塔米智能科技（北京）有限公司 | Robot collision detection system based on thin film circuit |
| CN107336266A (en) * | 2017-08-23 | 2017-11-10 | 江苏木盟智能科技有限公司 | Robot and its collision detection mechanism |
| CN109649316A (en) * | 2018-11-28 | 2019-04-19 | 江苏大学 | A kind of distress system and method based on vehicle collision class accident |
| JP7140047B2 (en) * | 2019-05-24 | 2022-09-21 | 株式会社デンソー | collision sensor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1636803A (en) * | 2003-12-24 | 2005-07-13 | 丰田自动车株式会社 | Vehicular bumper structure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5515148U (en) * | 1978-07-15 | 1980-01-30 | ||
| JPH09136597A (en) * | 1995-11-14 | 1997-05-27 | Kansei Corp | Collision detecting switch for vehicle occupant crash protection |
-
2007
- 2007-08-08 JP JP2007207047A patent/JP4997017B2/en not_active Expired - Fee Related
-
2008
- 2008-08-07 CN CN2008101449366A patent/CN101363761B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1636803A (en) * | 2003-12-24 | 2005-07-13 | 丰田自动车株式会社 | Vehicular bumper structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009040209A (en) | 2009-02-26 |
| JP4997017B2 (en) | 2012-08-08 |
| CN101363761A (en) | 2009-02-11 |
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