JPH0412807B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a road surface measuring device, and more particularly to a road surface measuring device including a sensor section that moves along a measurement surface.

[Conventional technology]

FIG. 7 shows a conventional example. In this conventional example, the main body frame 1 is stopped and installed on the road surface E during measurement.
, a slide frame 2 formed to be able to reciprocate from side to side in the figure along this main body frame 1 , a roller type measuring means 3 equipped on this slide frame 2 , and a vertical direction of this roller type measuring means 3 . The amount of movement (change in h) is expressed as the angle (θ) data “f
(θ)=l·cosθ” and outputs this. It is intended to directly measure the unevenness of the road surface by moving the roller type measuring means 3 in the direction A or B in the figure. The signal cable is connected between the reciprocating shaft encoder 4 and a signal processing section (not shown) on the main body frame 1.

[Problem that the invention seeks to solve]

However, in such conventional examples, the signal cable also moves along the main body frame 1 as the shaft encoder 4 moves, but this signal cable often does not have any cable cover or the like. In some cases, the signal cable is given an extra bend, which poses a problem in terms of durability when using the signal cable.

Furthermore, if the entire signal cable is housed in a certain concave groove, the signal cable will be repeatedly bent into double folds due to the reciprocating movement of the sensor part and the entanglement of the cables. There is a disadvantage that the signal cable is easily damaged. In addition, when the sensor side moves back and forth, friction occurs between the side wall in the groove and the plurality of signal cables, which not only easily damages the outer skin of the signal cable, but also overcomes this frictional force. There is an inconvenience that the capacity of the drive source for reciprocating the sensor section must be set larger than necessary.

[Purpose of the invention]

The present invention improves the inconveniences of the conventional example, and in particular significantly improves the durability of the signal cable, and makes it possible to reduce the capacity of the drive source for urging the sensor unit to move back and forth. To provide a road surface measurement device with
That purpose.

[Means for solving problems]

Therefore, in the present invention, there is provided a main body frame disposed along the road surface, a movable frame mounted on the main body frame so as to be movable back and forth, and a movable frame provided on the movable frame along the moving direction of the movable frame. In a road surface measuring device that has a frame guide means for a sensor section and a sensor section for road surface measurement that is equipped to be able to reciprocate along the frame guide means, a moving frame is provided with a frame guide means for moving the moving frame along the moving direction of the moving frame. A cable guide means is provided inside the cable tray, and the cable guide means is bent into a U-shape and is bendably formed in the shape of a coil spring and has a length substantially equal to the length of the cable tray. are doing. and fixing one end of the cable guide means to one end of the cable tray, and fixing the other end of the cable guide means to the sensor part so as to be movable together with the sensor part,
A signal cable for transmitting predetermined road surface information from the sensor section toward the main body frame is housed in the U-shaped cable guide means. This aims to achieve the above-mentioned purpose.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

In FIG. 1, reference numeral 11 indicates an ultrasonic transmitting/receiving section as a sensor section, and reference numeral 12 indicates a main body frame. The main body frame 12 is shown in FIGS.
As shown in the figure, it is formed into a rectangular shape, and is equipped with a moving frame 14 capable of reciprocating along its longitudinal direction (directions A and B in FIG. 1). On this moving frame 14, the ultrasonic transmitter/receiver 11 is arranged in the longitudinal direction of the moving frame 14 (C in FIG.
It is equipped to be able to move back and forth along the D direction.

A plurality of signal cables, which will be described later, are provided between the ultrasonic transceiver 11 and the main body frame 12 for transmitting and receiving signals to and from the ultrasonic transceiver 11.

Codes 70 and 80 are signal cables 11R and 11
5 shows a bendable cable guide means containing a T (see FIG. 5). This cable guide means 7
0 and 80 are arranged in first and second cable trays 76 and 86, respectively, each having a U-shaped cross section. Each of the first and second cable trays 76 and 86 has a film-like member fixed to its inner surface with a small friction coefficient.

In this embodiment, the ultrasonic transmitter/receiver 11 includes:
As shown in FIG. 2, a separate ultrasonic transmitter 11A and an ultrasonic receiver 11B are used. The ultrasonic transmitter/receiver 11 is disposed facing the road surface E, as shown in FIG.

The conveying means 13 includes a moving frame 14 extending from left to right in FIG. and a driving means 16 for driving.

The movable frame 14 is engaged with and supported by the main body frame 12 via a first frame guide means 17. This first frame guide means 17
are arranged along the main body frame 12.
Therefore, the movable frame 14 has a structure that allows it to reciprocate in directions A and B along the main frame 12 as shown in FIG.

The moving frame 14 is equipped with the above-mentioned ultrasonic transmitter/receiver 11 via the second frame guide means 18 .

The ultrasonic transmitter/receiver 11 supported by the moving frame 14 is locked to the aforementioned conveyance chain 15,
As will be described later, it is urged by this conveyance chain 15 so that it can move on the moving frame 14.

The ultrasonic transmitting section 11A of the ultrasonic transmitting and receiving section 11 is provided with an excitation circuit section 30 for outputting a predetermined pulsed ultrasonic wave, and the ultrasonic receiving section 11B is also provided with an excitation circuit section 30 for outputting a predetermined pulsed ultrasonic wave. A signal processing circuit section 31 for detecting and processing unevenness information of the road surface E is also provided.

Further, in FIG. 2, reference numerals 40A and 40B indicate brake means. This brake means 40A,
40B is fixedly mounted on the main body frame 12,
Normally, it has the function of gently applying a brake to the moving frame 14. Therefore, when the ultrasonic transmitter/receiver 11 is to be conveyed along the moving frame 14, the moving frame 14 is stopped. Furthermore, for example, when measuring the unevenness of an inclined surface, the movable frame 14 also functions to prevent free downward sliding of the movable frame 14.

Reference numerals 41A and 41B indicate frame sensors that constantly detect the presence or absence of the moving frame 14. The brake means 40A or 40B is activated immediately by the output from the frame sensors 41A, 41B, thereby stopping the movement of the movable frame 14. Here, the reference numeral 41C indicates an AND gate, and the reference numeral 41D indicates a selection drive control section. Further, reference numerals 42 and 43 indicate legs each mounted on the main body frame 12. Furthermore,
Reference numerals 44 and 45 denote moving frames 14 for locking the movement of the ultrasonic transmitter/receiver 11, respectively.
Shows the stopper equipped with. This stopper 4
4 and 45 are also equipped with shock absorbers. Further, reference numeral 60 indicates tension adjustment means for the drive chain 21A.

Here, the aforementioned conveyance chain 15, drive means 16, etc. will be explained in more detail based on FIGS. 2 to 4.

As shown in FIGS. 2 and 4, the conveyance chain 15 is installed over guide pulleys 15A and 15B mounted on the moving frame 14. As shown in FIG. 3, the cross section of the moving frame 14 is formed into a box shape with the bottom open in this embodiment, and guide pulleys 15A, 15B are provided at both ends of the inner side in FIG. 2 as described above. is equipped to rotate freely.

The above-described first frame guide means 17 and second frame guide means 18 are mounted on both sides of the movable frame 14 in FIG. 3, respectively.

As shown in FIG. 3, the first and second frame guide means 17, 18 are fixed in parallel to both sides of the movable frame 14 at equal intervals, and are connected to guide rails 17B, 18B. A set of two guide rollers 17A, 17A, . . . engaged with the upper and lower ends of each guide rail 17B, 18B.
...18A, 18A, . . .

In this embodiment, a set of two guide rollers 17A, 17A for the movable frame 14 are located at S ₁ , S ₂ , S ₃ ,
They are provided at five locations, S ₄ and S ₅ , thereby making it possible to support and guide the movable frame 14 at two or more locations when the movable frame 14 moves. In addition, the other two guide rollers 18
A, 18A is the case part 1 of the ultrasonic transmitter/receiver 11
1C is rotatably mounted as shown in FIGS. 2 and 3.

The drive means 16 includes a drive motor 20 equipped with a reduction gear mechanism 50, a drive chain mechanism 21 engaged with the output shaft of the reduction gear mechanism 50, and a drive as a synchronous drive section connected to the drive chain mechanism 21. It is composed of chain wheels 52A and 52B.

Of these, the drive chain mechanism 21 includes a drive chain 21A and a drive chain 21A in this embodiment.
a power chain vehicle 21B that applies running force to A;
Three guide chain cars 21C, 21D, which guide the travel of the drive chain 21A as shown in FIG.
21E. The guide chain wheels 21C and 21D are disposed below both ends of the main body frame 12, and the guide chain wheels 21C and 21D are arranged below both ends of the main body frame 12.
1B and the guide chain wheel 21E are arranged above both ends of the main body frame 12.

Furthermore, as shown in FIGS. 2 and 3, the guide chain cars 21D and 21E have a conveyor chain 1
Drive chain wheels 52A and 52B as synchronous drive units that apply running force to the drive chain mechanism 21 are coaxially provided, so that the drive force of the drive chain mechanism 21 is smoothly transmitted to the conveyance chain 15. It's summery.

As shown in FIG.
It is attached via 1B.

Further, the output shaft of the reduction gear mechanism 50 is equipped with an encoder 60 that regulates the repetition time of the excitation pulse signal output from the excitation circuit section 30 described above. Reference numeral 32A indicates a sensor section for the excitation circuit section 30 that inputs a predetermined signal from the encoder 60, and 32B indicates a case section in which the excitation circuit section 30 is housed.

One cable guide means 70 is shown in FIG.
2, a flexible cable guide 71 formed in the shape of a tension spring and relatively long, a non-stretchable and bendable flexible wire member 72 disposed within the cable guide 71, and a flexible The locking member 73 integrally fixes both ends of the wire member 72 to both ends of the coiled cable guide 71.

Of these, the cable guide 71 is formed of piano wire in this embodiment. Further, as the flexible wire member 72, a nylon coated flexible wire is used in this embodiment.

Therefore, the flexible wire member 72 acts to sufficiently resist the tensile force applied to the entire body from the outside, thereby preventing deformation due to the overall tension. has been done. On the other hand, the coiled cable guide 71, which is the outer sheath, acts sufficiently to resist compressive external force, thereby preventing harmful effects such as irregular and abnormal bending. .

The other cable guide means 80 is constructed in exactly the same way as the one cable guide means 70, and functions in the same manner.

The first cable tray 76 is equipped with one cable guide means 70 bent into a U-shape. This first cable tray 76
As shown in FIGS. 1 and 3, it is composed of a fixed tray section 76A mounted on the main body frame 12 and a movable tray section 76B mounted on the movable frame 14. Here, each tray portion 76A,
76B are mutually open on their opposing surfaces.

As shown in FIG. 5, the ends 70A and 70B of one of the cable guide means 70 described above are respectively attached to the left end portions of these tray portions 76A and 76B in FIG. 1. To explain this in more detail, one cable guide means 70 has one end 70A attached to a fixed tray section 76A on the main body frame 12 side, and the other end 70B attached to a movable tray section 76B on the movable frame 14 side. It is fixed as shown in Figure 1.

FIG. 5 1 shows the case where one of the cable guide means 70 is fixed by a spring clamp 74 .
Further, FIG. 5 2 shows an intervening member 74A such as a rubber cushion.
This shows an example in which the cable guide means 70 is fixed via the cable guide means 70.

Furthermore, the fixed tray section 76A and the movable tray section 7
As shown in FIG. 3, the bottom surface portion of each opposing surface of 6B is provided with bulging portions 76C and 76D that bulge upward as a whole, as shown in FIG. Therefore, even if there is a difference in height between the main body frame 12 and the movable frame 14 or a change in the distance between them, the spring action of the cable guide means 70 allows the cable guide means 70 to easily jump over the gap and maintain the connected state. The advantage is that it can be done.

Moreover, even when the cable guide means 70 is tilted to the right or left in FIG. 3, the inconvenience of the cable guide means 70 falling out is completely eliminated. The second cable tray section 86 is shown in FIGS.
As shown in the figure, it is fixed to the moving frame 14. This second cable tray section 86 is equipped with the other cable guide means 80 bent into a U-shape. One end 80A of the other cable guide means 80 is fixed to the left end of the second cable tray section 86 in FIG. This other cable guide means 8
0 is fixed to the ultrasonic transmitting/receiving section 11 side as a sensor section.

The method of attaching each end of the cable guide means 80 to one of the cable guide means 70 is shown in FIG.
The same method is used as in the case of . Therefore, as the ultrasonic transmitting/receiving section 11 moves in the C (or D) direction, the bending section 80C also moves in the C (or D) direction at half the speed.

Further, the second cable tray section 86 is equipped with a partition plate 87 as a bending motion regulating means for the cable guide between the left end in FIG. 1 and the approximate center in the longitudinal direction of the cable tray section 86. has been done. Therefore, even if the ultrasonic transducer 11 moves in a direction that rapidly compresses the cable guide means 80 due to a change in direction or the like, the guiding action of the partition plate 87 and the spring action of the cable guide means 80 The cable guide means 80 is not bent more than necessary, so that the signal cable is effectively protected.

Next, the overall operation of the above embodiment will be explained.

First, under normal conditions, the brake means 4
Since 0A or 40B loosely locks the movable frame 14, the movement of the movable frame 14 is stopped at this point. In this case, one cable guide means 70 is also in a stopped state. Now actuate the drive means 16,
When the conveyance chain 15 is rotated in the counterclockwise direction in FIG.
move in the C direction (to the right in Figure 2) together with the
At the same time, the portion of the cable guide means 80 on the ultrasonic transmitter/receiver section 11 side moves from the bending portion 80C as a unit.

Here, the ultrasonic transmitter/receiver 11 transmits the moving frame 1
Even if the stopper 45 of 4 is hit, the driving means 1
6 is designed not to stop at all. Therefore, when the ultrasonic transmitter/receiver 11 comes into contact with the stopper 45, the moving frame 14 also moves integrally to the right in FIG. 2 as the ultrasonic transmitter/receiver 11 moves to the right in FIG. . Therefore, in this case, each cable guide means 7 on one side and the other side
The portions from the bending portions 70C and 80C of 0 and 80 to the moving member move integrally in the same direction.

FIG. 6 shows how the movable frame 14 moves from the left to the right in FIG.
They move in the same direction as shown in the figure. Here, the moving frame 14 is guided by the guide roller 17A located at S ₃ of the main body frame 12 and moves to the right,
Subsequently, it is guided by each guide roller 17A of S ₄ and S ₅ and moves further to the right.

On the other hand, in the driving means 16, the driving chain wheel 5
2A, but as the movable frame 14 moves, the other drive chain car 52B applies a running force to the conveyance chain 15. In this case, the other driving chain wheel 52B can be engaged and disengaged from the conveyance chain 15 very easily, as shown in FIG.

Then, when the left end of the moving frame 14 in FIG. 2 enters the right side of the position sensor 41B, the selection drive control section 41D that receives this information,
It operates immediately to disconnect the drive motor 20 from the power source and to stop the moving frame 14.

Next, the control means (not shown) is operated to reverse the rotation of the drive motor 20 (by this operation, the brake means 40B is released from the complete stopping operation for the movable frame 14).
In this case, the ultrasonic transmitter/receiver 11 located at the right end in FIG. 2 (the position of the imaginary line) first starts moving to the left (direction D) in the diagram.

On the other hand, the moving frame 14 has brake means 40
The gentle locking action of B prevents any movement. For this reason, the ultrasonic transmitter/receiver 1
1 moves independently in the direction D in the figure until it comes into contact with a stopper 44 provided at the left end of the moving frame 14 in FIG. In this case, the ultrasonic transmitter/receiver 11 side from the bending portion 80C of the other cable guide means 80 also moves integrally in the D direction. However, one cable guide means 70 remains in a stopped state. The ultrasonic transmitter/receiver 11 that has come into contact with the stopper 44 then moves to the left in the figure together with the movable frame 14, and at the same time, the portion of one cable guide means 70 on the movable frame 14 side also moves together. The right end of the moving frame 14 in FIG. 2 is the position sensor 4.
1A, the brake means 40A receives this information and immediately disconnects the motor 20 from the power source and stops the moving frame 14.

During this time, since the signal cable is not exposed at all, the frictional force between each of the cable guide means 70, 80 and each of the first and second cable trays 76, 86 is lower than that of the conventional signal cable exposed type. Therefore, the capacity of the drive motor for each part can be set to be extremely small. Also, the signal cable is not worn out, so its durability is significantly increased.

Thereafter, by performing the same operations as described above, the ultrasonic transmitting/receiving section 11 repeatedly performs the same operations as described above, and during this time, the unevenness of the road surface is effectively measured.

In addition, in the above embodiment, the cable guide 7
Although piano wire is used as an example, it may be made of, for example, a plastic member as long as it functions equally well.

〔Effect of the invention〕

As described above, according to the present invention, a signal cable is installed in a coiled spring-like cable guide means that is flexible and non-stretchable, and the cable guide means is bent into a U-shape and placed in a cable tray. Since the signal cables are placed on the cable tray, the trouble of dispersing the signal cables to the outside is eliminated and work efficiency is improved.In addition, one end of the cable guide means is fixed to one end of the cable tray, and the cable guide means and other cables are placed on the cable tray. Since the sensor unit, which is equipped for reciprocating movement, is connected to the end, the signal cable never comes into direct contact with the cable tray even when the sensor unit moves back and forth, and this allows the sensor unit to move back and forth smoothly. In this respect, the capacity of the drive source that urges the movement of the sensor part can be reduced, and the damage caused by wear on the signal cable is significantly reduced, so the durability of the signal cable is significantly increased. It is possible to provide an unprecedented and excellent road surface measuring device that can be used to measure the surface of a road.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view showing an embodiment of the present invention;
Figure 2 is a partially omitted front view of Figure 1, Figure 3 is a sectional view taken along the - line in Figure 2, and Figure 4 is a partially omitted front view of Figure 1.
FIG. 5 is an explanatory diagram showing the conveyance chain portion in the figure, FIGS. 5 1 and 2 are explanatory diagrams each showing the method of engaging the cable guide means in FIG. 1, and FIG. 6 is an explanatory diagram showing the overall operation of FIG. 2. 7 are front views showing a conventional example. 11...Ultrasonic transmitting/receiving section as a sensor section, 1
1R, 11T...Signal cable, 12...Main frame, 14...Movement frame, 18...Second frame guide means as frame guide means for sensor section, 80...Cable guide means, 8
6... Cable tray, 87... Partition plate.

Claims (1)

[Claims] 1. A main frame disposed along the road surface, a moving frame mounted on the main frame so as to be movable back and forth, and a moving frame mounted on the moving frame along the moving direction of the moving frame. A road surface measuring device comprising a frame guide means for a sensor section, and a sensor section for road surface measurement, which is equipped to be able to reciprocate along the frame guide means, the moving frame being provided with a frame guide means for a sensor section, and a sensor section for road surface measurement, which is equipped to be able to move back and forth along the frame guide means. The cable guide means is equipped with a cable tray arranged along the cable tray, and within the cable tray, a cable guide means formed in the shape of a coiled spring and having a length approximately equal to the length of the cable tray is bent into a U-shape. one end of the cable guide means is fixed to one end of the cable tray, the other end of the cable guide means is fixed to the sensor section so as to be movable together with the sensor section, and the U-shaped 1. A road surface measuring device, characterized in that a signal cable for transmitting predetermined road surface information from the sensor section toward the main body frame is housed in a cable guide means that is bent in a direction. 2. A main body frame disposed along the road surface, a movable frame mounted on the main frame so as to be movable back and forth, and a sensor frame provided on the movable frame along the moving direction of the movable frame. In a road surface measuring device having a guide means and a road surface measuring sensor section equipped to be able to reciprocate along the frame guide means, the sensor section is arranged on the movable frame along the moving direction of the movable frame. Equipped with a cable tray, within the cable tray, a cable guide means formed in the shape of a coiled spring and having a length substantially equal to the length of the cable tray is bent into a U-shape, and the cable is bent into a U-shape. One end of the guide means is fixed to one end of the cable tray, and the other end of the cable guide means is fixed to the sensor part so as to be movable together with the sensor part, and the cable guide is bent into the U-shape. A signal cable for transmitting predetermined road surface information from the sensor section toward the main body frame is housed in the means, and the cable guide means is bent into the U-shape and arranged in the cable tray. A road surface measurement device characterized in that a partition plate is formed from one end of the cable tray to the center of the cable tray.