JP5799402B2 - An instrument that secures the sensor to the car - Google Patents

Description

  The present invention relates to an instrument for fixing an acceleration sensor or an angular acceleration sensor to an automobile.

  The need to measure acceleration or angular acceleration during driving tests of automobiles is increasing especially with the introduction of airbags to automobiles.

  Conventionally, as a method of fixing an acceleration sensor or an angular acceleration sensor (hereinafter simply referred to as “sensor”) in an interior space of an automobile, a table is mounted by processing an armrest of an automobile seat, and the sensor is arranged on the table. Has been widely adopted.

  Since the above method is particularly troublesome, time consuming and expensive to mount the table, in recent years, as shown in Non-Patent Document 1 (RT-Strut), a tension rod is disposed between the floor and the ceiling of the automobile. A method of fixing the sensor to the tension rod is used in part.

[online], [October 13, 2011 search], Internet <http://www.dynatech-jp.com/product/OxTS/>

  Some acceleration sensors require that the direction of the acceleration sensor be installed horizontally during measurement, and some do not. When the former type acceleration sensor is fixed to an automobile with the appliance described in Non-Patent Document 1, a horizontal base is attached to the stretching rod so as to extend in the horizontal direction from the stretching rod, and the acceleration sensor is placed on the horizontal platform. Will be placed.

  In that case, there is a problem in that the accuracy of the measurement result is reduced because the vertical swing is caused by the bending of the horizontal base as the automobile travels.

  In addition, regardless of which type of acceleration sensor is used, since the acceleration sensor is fixed to the tension bar in an exposed form, there is a risk that the acceleration sensor may hit the surroundings and be damaged during handling.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a means that makes it easy to handle and allows a sensor to be easily fixed in the interior space of an automobile without reducing the accuracy of measurement results.

The present invention has been conceived in view of the above object,
A tension rod that is arranged vertically in the interior space of the automobile and is fixed to the automobile by being urged in a direction extending in the longitudinal direction with respect to the automobile,
The strut rod is disposed at any position on the central axis in the longitudinal direction, opens in at least one of the directions perpendicular to the longitudinal direction, and forms a frame for forming an acceleration sensor or an angular velocity sensor. An instrument for fixing a sensor having a wall surface to an automobile is provided (first embodiment).

In the first embodiment described above,
A configuration may be adopted that includes a pan head that is arranged inside the space and whose direction can be freely adjusted within a predetermined range and that supports the acceleration sensor or the angular velocity sensor from below in a horizontal state (second embodiment) Embodiment).

In the second embodiment,
You may employ | adopt the structure provided with the level device attached to the said pan head and displaying the direction of the said pan head (3rd embodiment).

In any one of the first to third embodiments,
The strut rod includes a frame or a wall surface forming the space, a first rod-shaped body disposed on one side as viewed from the space, and the first rod-shaped body as viewed from the space. A second rod-like body disposed on the opposite side,
Each of the first rod-like body and the second rod-like body can be adjusted in length in the longitudinal direction, or selected from a plurality of rod-like bodies having different lengths, and can be attached to and detached from the frame or the wall surface. An attached configuration may be employed (fourth embodiment).

  According to the instrument according to the first embodiment of the present invention, since the sensor is arranged in a box-shaped space formed on the central axis of the tension rod, compared with the case where a horizontal base is used, Highly accurate measurement results can be obtained. Further, since the sensor is protected from an external impact or the like by a frame or a wall surface forming a box-like space, the handling is easy.

  Moreover, according to the instrument concerning said 2nd embodiment of this invention, adjustment of direction of a sensor is easy.

  Moreover, according to the instrument concerning the said 3rd embodiment of this invention, since the inclination of a sensor is easily known with a level device, a sensor can be installed horizontally correctly and rapidly.

  Further, according to the instrument according to the fourth embodiment of the present invention, since the vertical position of the sensor can be easily adjusted, for example, when the sensor is to be fixed at the height of the center of gravity of the automobile. Its installation is easy.

FIG. 1 is a diagram showing an outline of an instrument according to an embodiment of the present invention. FIG. 2 is a photograph showing a state in which an instrument according to an embodiment of the present invention is arranged in a car. FIG. 3 is a photograph showing the vicinity of the sensor in a state where the instrument according to one embodiment of the present invention is arranged in the car. FIG. 4 is a view schematically showing an instrument according to another embodiment of the present invention.

(First embodiment)
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing an outline of the instrument 1 according to the present embodiment. 1 is a cross-sectional view of the instrument 1 cut in a plane parallel to the longitudinal direction and viewed from the side, and the center figure is parallel to the longitudinal direction and perpendicular to the cross section of the left figure. It is a cross-sectional view when viewed from the side cut by a plane that forms a cross-section of a long pipe whose length in the longitudinal direction is longer than that of the pipe used in the instrument of the left end and the central figure (When viewed from the side and cut in the same plane as the center figure).

  FIG. 2 is a photograph showing a state in which the instrument 1 is arranged in the car, and FIG. 3 is a photograph showing the vicinity of the sensor of the instrument 1 in a large scale.

  The instrument 1 is used to fix a sensor in the interior space of an automobile in order to measure acceleration or angular acceleration while the automobile is running.

  The instrument 1 includes a tension rod 11, a pan head 12, and a level device 13.

  The tension rod 11 is arranged in the interior space of the automobile so that the longitudinal direction thereof is the vertical direction, and is fixed to the automobile by being biased in a direction extending in the longitudinal direction with respect to the automobile.

  The tension bar 11 includes a frame 111, a wall surface 112, a pipe folder 113, an outer pipe 114, an inner pipe 115, and a lock pin 116.

  The frame 111 and the wall surface 112 are arranged at the lower end of the tension bar 11 and form a space for arranging the sensor.

  The wall surface 112 is constituted by a wall surface 112L and a wall surface 112U which are two rectangular plates. The frame 111 is a four columnar body, and is arranged so as to bridge four opposing corners of the wall surface 112U and the wall surface 112L, and both ends thereof are fixed to the wall surface 112L and the wall surface 112U, respectively. Due to the frame 111, the wall surface 112L and the wall surface 112U are arranged in parallel at a distance from each other. As a result, a space is formed between the frame 111 and the wall surface 112 so as to open in a direction perpendicular to the longitudinal direction of the tension bar 11, that is, in the lateral direction. This space is hereinafter referred to as a “box”.

  The length of the frame 111 in the longitudinal direction is, for example, 13 centimeters. The size of the wall surface 112 is, for example, 12 cm × 10 cm. The material of the frame 111 and the wall surface 112 is, for example, aluminum.

  The box is located on the longitudinal central axis of the strut 11. Therefore, the sensor arranged in the box is also arranged on the central axis of the tension bar 11.

  The pipe folder 113 is a hollow box-like body that is fixed on the upper surface of the wall surface 112U with its lower surface lifted, and has circular openings on the upper and lower surfaces thereof. The outer pipe 114 is inserted so as to penetrate the circular opening. In order to fix the inserted outer pipe 114, the pipe folder 113 has a bolt knob 1131. When the user screws the bolt knob 1131 into a screw hole provided in the main body of the pipe folder 113, the outer pipe 114 is moved to the bolt knob 1131. As a result of being pressed against the side surface of the circular opening by the tip of the tube, it is fixed to the pipe folder 113.

  The outer pipe 114 and the inner pipe 115 are circular pipes that increase the length in the longitudinal direction of the tension rod 11 and play the role of a column.

  The inner pipe 115 is inserted inside the outer pipe 114 and slides so as to expand and contract in the longitudinal direction. The lock pin 116 is a pin for fixing the position of the inner pipe 115 with respect to the outer pipe 114.

  The outer pipe 114 has, for example, a length of 46 centimeters in the longitudinal direction, an outer diameter of a cross section cut by a plane perpendicular to the longitudinal direction of 3.8 centimeters, and an inner diameter of 3.2 centimeters.

  For example, the inner pipe 115 has a length in the longitudinal direction of 53.5 centimeters, an outer diameter of a cross section cut by a plane perpendicular to the longitudinal direction, and an inner diameter of 2.4 centimeters.

  A hole for inserting the lock pin 116 is provided at one position at a position, for example, 10 centimeters down from the upper end of the side surface of the outer pipe 114 so as to penetrate both side surfaces. On the other hand, a number of holes for inserting the lock pins 116 are provided on the side surface of the inner pipe 115 every 3 centimeters in the longitudinal direction so as to penetrate both side surfaces.

  The depth of insertion of the inner pipe 115 with respect to the outer pipe 114 is adjusted by the user, and the lock pin 116 passes through the holes at the position where one of the holes of the outer pipe 114 and the numerous holes of the inner pipe 115 overlaps. When inserted, this fixes the position of the inner pipe 115 relative to the outer pipe 114 and determines their overall length.

  As described above, the entire length of the tension bar 11 is generally determined by the sliding of the inner pipe 115 with respect to the outer pipe 114 and the fixing by the lock pin 116, but the upper and lower positions of the position of the tension bar 11 in the interior space of the automobile are determined. In order to adjust the overall length of the tension bar 11 exactly to the length in the direction, the tension bar 11 is further provided with a mechanism for finely adjusting the total length.

  Specifically, an end portion (upper end portion) of the inner pipe 115 opposite to the side inserted into the outer pipe 114 is a foot jack 1152 to which a urethane sheet 1151 that is pressed against the lower surface of the ceiling of the automobile is attached. A screw mechanism 1153 for finely adjusting the length of the tension bar 11 is provided.

  The screw mechanism 1153 has a bolt that is screwed into a screw hole provided in the upper surface of the main body of the inner pipe 115. For example, the bolt is screwed into the screw hole from the deepest to the shallowest. Within the range of 7.5 centimeters, the overall length of the tension bar 11 can be adjusted.

  The material of the main body of the outer pipe 114 and the main body of the inner pipe 115 is, for example, aluminum, and the material of the upper surface of the main body that forms the screw hole of the inner pipe 115 and the bolt mechanism of the screw mechanism 1153 is, for example, stainless steel.

  The above is the description of the structure of the tension rod 11.

  In the space formed between the frame 111 and the wall surface 112, that is, in the box, a camera platform 12 and a level 13 for fixing the sensor horizontally are attached.

  The pan head 12 has a structure substantially similar to that of a camera pan head. More specifically, the pan head 12 includes a ball receiver that forms a spherical hollow portion, a ball that is disposed in the ball receiver, a base plate that is a plate attached to a post projecting from the ball, and a ball And a knob for fixing the rotation of the ball relative to the ball receiver by tightening the receiver. A sensor is fixed on the upper surface of the base plate with, for example, a double-sided tape.

  The leveling device 13 is composed of two tubular bodies filled with colored oil and bubbles, and is mounted on the lower surface of the base plate of the pan head 12, for example, so that the longitudinal directions of the two tubular bodies are perpendicular to each other. . When the base plate is leveled, the bubbles in each tubular body of the leveling device 13 move to a position just in the middle of the oil, so that the user can visually check whether the base plate is horizontal.

  The above is the description of the structure of the instrument 1. Then, an example of the usage method of the instrument 1 is demonstrated.

  First, the user inserts the outer pipe 114 into the pipe folder 113 in the assembly of the frame 111, the wall surface 112, and the pipe folder 113 with the sensor fixed in the box, and fixes the outer pipe 114 with the bolt knob 1131.

  Subsequently, the user inserts the inner pipe 115 into the outer pipe 114. Thereby, the tension rod 11 is assembled. At that time, the screw mechanism 1153 is kept in the most deeply tightened state with respect to the main body of the inner pipe 115.

  Subsequently, the user brings the strut rod 11 assembled as described above into the vehicle interior space and arranges it at a desired position so that the longitudinal direction thereof is the vertical direction.

  Subsequently, the user pulls out the inner pipe 115 from the outer pipe 114 until the hole of the outer pipe 114 and the hole of the inner pipe 115 coincide with each other and the urethane sheet 1151 is closest to the lower surface of the automobile ceiling. Then, the lock pin 116 is inserted into the holes of the outer pipe 114 and the inner pipe 115 at that position.

  Subsequently, the user turns the bolt of the screw mechanism 1153 counterclockwise to extend the full length of the tension bar 11. Along with this, the urethane sheet 1151 is pressed against the lower surface of the ceiling of the automobile, and the tension bar 11 is fixed to the automobile.

  Subsequently, the user loosens the knob of the pan head 12 so that the ball freely rotates in the ball receiver, adjusts the base plate of the pan head 12 to be horizontal while looking at the level 13, and moves the knob. Tighten to fix the base plate in a horizontal position. Thereby, the sensor fixed on the base plate is fixed at the horizontal position.

  As described above, according to the instrument 1, the user can easily fix the sensor at a desired position in the interior of the automobile without processing the automobile. At that time, since the sensor is arranged on the longitudinal axis of the tension bar 11, for example, compared with a method in which a horizontal base is attached to the tension bar and the sensor is fixed thereon, the vibration due to the deflection of the horizontal base is reduced. The risk of picking up noise in measurement such as delay is reduced.

  In addition, since the sensor is surrounded by the frame 111 and the wall surface 112, even if the strut 11 is struck against something when handling the strut 11, the sensor is less likely to be damaged and handled easily. Can do.

  Further, it is easy to level the sensor by the pan head 12 and the level device 13.

(Second embodiment)
Hereinafter, another embodiment of the present invention will be described with reference to the drawings.

  FIG. 4 is a diagram illustrating an outline of the instrument 2 according to the present embodiment.

  In the instrument 2, a pipe folder 213, an outer pipe 214, an inner pipe 215 and a lock pin 216 are arranged on each of the upper and lower sides of the box. Each of these structures is the same as the pipe folder 113, the outer pipe 114, the inner pipe 115, and the lock pin 116 of the instrument 1 described above.

  By having the above configuration, in the instrument 2, the vertical position of the box can be adjusted.

  For example, when it is desired to place a sensor at the center of gravity of an automobile, according to the instrument 1, the sensor can be placed at the center of gravity on the plane, but the vertical position cannot be matched with the center of gravity.

  On the other hand, if the instrument 2 is used, the user sets the fixing position of the inner pipe 215 with respect to the outer pipe 214 positioned on the upper side of the box and the fixing position of the inner pipe 215 with respect to the outer pipe 214 positioned on the lower side of the box, respectively. After adjusting the approximate position in the vertical direction of the sensor by adjusting to an appropriate position, by adjusting the screwing depth of the upper screw mechanism 2153 and the lower screw mechanism 2153, respectively, Can be finely adjusted.

(Modification)
The embodiment described above can be variously modified within the scope of the technical idea of the present invention.

  For example, the above-described box is configured by the two wall surfaces 112 and the four frames 111, but the present invention is not limited thereto. Therefore, other configurations may be employed, for example, a box may be formed by a wall surface arranged perpendicular to the wall surface 112 instead of the frame 111. However, in order to allow the sensor to be taken in and out, it is necessary to be able to open in the direction perpendicular to the longitudinal direction of the tension rod, that is, in the lateral direction.

  In the above-described embodiment, as a mechanism for roughly adjusting the overall length of the tension rod, a mechanism is adopted in which the inner pipe is inserted into the outer pipe and the inner pipe is pulled out from the outer pipe by an appropriate length and fixed. However, various other methods can be employed as a mechanism for adjusting the length of the tension bar.

  For example, by preparing a large number of pipes having different lengths at intervals of 5 centimeters and attaching an appropriate length of them to the pipe folder 113, the length of the pipe on the upper side of the box in the instrument 1 is set. Alternatively, the length of each of the upper and lower pipes of the box in the instrument 2 may be adjustable.

  In addition, the mechanism that urges the tension rod in the direction to extend between the lower part of the car floor or armrest and the lower surface of the ceiling (upper part) is a mechanism that turns the screw mechanism bolt to reduce the screwing depth. It is not limited, and other mechanisms may be adopted. For example, in place of or in addition to the screw mechanism 1153 and the screw mechanism 2153, a tension spring 11 or a powerful spring that biases the entire length of the tension rod 21 is provided, and the elasticity of the tension rod 11 or The tension rod 21 may be stretched against the automobile.

  Moreover, the pan head 12 and the level device 13 may be replaced by a device having another structure having a similar function. Or if there is no problem in particular, the pan head 12 and the level 13 may not be provided.

  Further, the numerical value, shape, material, number, position, etc. for specifying each component of the device 1 and the device 2 are merely examples, and other values, shape, material, number, position, etc. are used if there is no particular problem. May be.

  The instrument of the present invention can easily fix an acceleration or a sensor for measuring each acceleration during driving of the automobile at an appropriate position in the interior space of the automobile. It can be used in the manufacturing industry because it can be mass-produced for that purpose.

DESCRIPTION OF SYMBOLS 1 ... Apparatus, 11 ... Strut stick, 111 ... Frame, 112 ... Wall surface, 113 ... Pipe folder, 1131 ... Bolt knob, 114 ... Outer pipe, 115 ... Inner pipe, 1151 ... Urethane sheet, 1152 ... Foot jack, 1153 ... Screw mechanism , 116 ... Lock pin, 12 ... Pan head, 13 ... Level, 2 ... Instrument, 21 ... Strut rod, 213 ... Pipe folder, 214 ... Outer pipe, 215 ... Inner pipe, 216 ... Lock pin, 2153 ... Screw mechanism

Claims (4)

A tension rod that is arranged vertically in the interior space of the automobile and is fixed to the automobile by being urged in a direction extending in the longitudinal direction with respect to the automobile,
The strut rod is disposed at any position on the central axis in the longitudinal direction, opens in at least one of the directions perpendicular to the longitudinal direction, and forms a frame for forming an acceleration sensor or an angular velocity sensor. An instrument that secures a sensor with a wall to an automobile. The instrument according to claim 1, further comprising a pan head that is disposed inside the space, the direction of which is freely adjustable within a predetermined range, and that supports the acceleration sensor or the angular velocity sensor from below in a horizontal state. The instrument according to claim 2, further comprising: a level attached to the pan head to display a direction of the pan head. The strut rod includes a frame or a wall surface forming the space, a first rod-shaped body disposed on one side as viewed from the space, and the first rod-shaped body as viewed from the space. A second rod-like body disposed on the opposite side,
Each of the first rod-like body and the second rod-like body can be adjusted in length in the longitudinal direction, or selected from a plurality of rod-like bodies having different lengths, and can be attached to and detached from the frame or the wall surface. The instrument according to any one of claims 1 to 3, wherein the instrument is attached.