JP6177626B2 - Road inspection device - Google Patents

Description

  The present invention relates to a road inspection apparatus that applies an impact to a road and measures the influence of the road due to the impact to inspect the road.

As an inspection apparatus that can inspect a pavement surface nondestructively by applying an impact to the road and measuring the influence of the road due to the impact, an apparatus described in Patent Document 1 is known.
The mobile road surface deflection measuring device described in Patent Document 1 is mounted on a towed vehicle and is moved by being pulled by a base vehicle, and an impact load applying means for applying an impact load to a road, and a moving direction of the vehicle And a signal processing means for separating and extracting only the deflection caused by the impact load by removing irregularities peculiar to the road surface from the signals from the respective deflection measurement sensors.

JP 2000-292330 A

A conventional road inspection device applies an impact caused by a falling weight to the center in the width direction of a lane (lane).
On the other hand, the deterioration of the road is more conspicuous in the right or left side of the lane than the center of the lane, where the tires can cause wrinkles. Therefore, it is desirable for the road inspection to stop with the wheels straddling the lane line or center line, and to apply the load applied by the falling weight to the right or left side of the lane.

  However, in this state, two lanes are occupied for the road inspection, and thus two-lane travel regulations are necessary. Further, when the travel restriction is performed on only one lane, it is dangerous because other vehicles travel on the uncontrolled lane at a tremendous speed.

  Therefore, an object of the present invention is to provide a road inspection apparatus capable of improving the safety of measurement work while improving the accuracy and reliability of measurement.

  The road inspection device of the present invention includes a loading device that applies an impact to the road, a deflection sensor device that measures the degree of deflection of the road due to the impact from the loading device described above, and the loading device that is And a slide device that moves in the direction.

  According to the road inspection device of the present invention, since the loading device that applies an impact to the road can be moved between the right side and the left side of the lane by the slide device, the vehicle is located at the center in the width direction of the lane. Even so, the loading device can be moved to the right or left side of the lane.

  It is desirable that two of the deflection sensor devices are installed correspondingly when the loading device is positioned on each of the right side and the left side by the slide device. When two deflection sensor devices are provided, it is not necessary to bring the deflection sensor device together when the loading device is brought to either the right side or the left side.

  If the load device and the slide device described above are installed on the cargo bed of the vehicle located behind the rear wheel of the vehicle, the load device slides behind the rear wheel drive shaft. Wheel drive shaft does not get in the way.

The deflection sensor device is arranged in a row and lowers the plurality of displacement meters for measuring the deflection of the road and the plurality of displacement meters from the front position of the rear wheel driving shaft lower than the rear wheel driving shaft. In addition, it is desirable to include a sensor moving mechanism unit that is moved downward to the lower position of the rear wheel drive shaft and then further lowered to contact the pavement surface.
Even if the initial position of the displacement sensor of the deflection sensor device is at the front position of the rear wheel drive shaft, the sensor moving mechanism section moves the plurality of displacement meters from the front position of the rear wheel drive shaft to the rear wheel drive shaft. Lower and lower the rear wheel drive shaft and move it to the rear, and then lower it further to make contact with the pavement surface, so even if multiple displacement meters are arranged in a row, rear wheel drive Shaft does not interfere with displacement meter movement.

  In the present invention, the loading device can be moved to the right side or the left side of the lane even if the vehicle is located in the center in the width direction of the lane, so the loading device is inspected at a position where deterioration of the road is remarkable. can do. Therefore, the present invention can improve the safety of measurement work while improving the accuracy and reliability of measurement.

It is a side view of the state which saw through the inside of the road inspection vehicle concerning an embodiment of the invention. It is a top view of the state which saw through the inside of the road inspection vehicle shown in FIG. It is the figure seen from the back of the state which looked through the inside of the road inspection vehicle shown in FIG. It is a perspective view for demonstrating the loading apparatus and slide apparatus of the road inspection vehicle shown in FIG. It is the figure which looked at the loading apparatus of the road inspection vehicle shown in FIG. 1 from the back of the vehicle. It is a figure for demonstrating the deflection | deviation sensor apparatus of the road inspection vehicle shown in FIG. It is a connection diagram for demonstrating each apparatus of the road inspection vehicle shown in FIG. It is a flowchart for demonstrating the work procedure by the road inspection vehicle shown in FIG. It is a flowchart for demonstrating the measurement in the operation | work procedure shown in FIG. It is a figure which shows another deflection sensor apparatus.

A road inspection vehicle according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the road inspection vehicle 10 moves to a measurement location and diagnoses the soundness of road pavement. A road inspection device is mounted on a vehicle 20 such as a one-box car. ing. The road inspection device includes a loading device 30 that applies an impact to the road, a sensor device 40, a measuring device 50, and a slide device 60.

  The vehicle 20 is an FR vehicle in which an engine is mounted on the front and the rear wheels are driven. In the vehicle 20, an opening 21 a for sliding the loading device 30 is formed in the loading platform 21.

The loading device 30 is installed at a position behind the rear wheel of the loading platform 21. The loading device 30 can be a conventional loading device.
As shown in FIG. 4, the loading device 30 includes a loading plate 31, a loading leg portion 32, a weight portion 33, a weight raising cylinder portion 34, a lift cylinder portion 35, a rubber buffer portion 36, and an electromagnetic chuck portion. 37 and a base 38.

The loading plate 31 is a metal plate that contacts the pavement surface and applies an impact to the pavement surface.
The loading leg portion 32 extends downward from the lower end of the weight raising cylinder portion 34, the loading plate 31 is attached to the tip portion, and the loading plate 31 is suspended.
The weight portion 33 is formed by stacking metal block portions serving as loads.
The weight raising cylinder portion 34 is provided so as to penetrate the central portion of the weight portion 33 in the vertical direction. The weight raising cylinder portion 34 is for raising the weight portion 33 that is extended and attracted to the electromagnetic chuck portion 37.
The lift cylinder portion 35 is disposed along the concave portions at both ends of the weight portion 33. The lift cylinder portion 35 is for contracting when the loading plate 31 is brought into contact with the pavement surface to lower the entire loading device 30.
The rubber buffer portion 36 functions as a buffer member that absorbs an impact when the weight portion 33 is dropped.
The electromagnetic chuck portion 37 is attracted to the weight portion 33 to raise the weight portion 33 along with the extension of the weight raising cylinder portion 34, or to release the weight portion 33 and to remove the weight portion 33 from the weight raising cylinder portion 34. It is for dropping along.
The base unit 38 is a support member for installing the loading device 30 on the slide device 60.

The sensor device 40 includes a deflection sensor device 41 illustrated in FIG. 6, an impact load sensor unit 42 illustrated in FIG. 5, and a temperature sensor unit 43 and a distance sensor unit 44 illustrated in FIG. 7.
Two deflection sensor devices 41 shown in FIGS. 1 and 6 are respectively installed on the right side and the left side of the loading platform 21. The deflection sensor device 41 includes a displacement meter 411 that measures the deflection of the road, an arrangement bar 412 that arranges the displacement meter 411 in a straight line along the longitudinal direction of the vehicle 20, and a displacement meter 411 on the pavement surface. A sensor moving mechanism 413 that is grounded, separated from the road, and retracted to the bottom of the vehicle 20 is provided.
The displacement meter 411 is arranged on the arrangement bar 412 so that the interval increases as the distance from the loading plate 31 increases. The arrangement bars 412 of the two deflection sensor devices 41 are installed so as to be parallel to each other.
The sensor moving mechanism unit 413 includes a frame unit 413a that suspends the arrangement bar 412, and a drive unit 413b that moves the frame unit 413a up and down in the vertical direction and moves it in the front-rear direction. In the frame part 413a, the front end of the vertical frame protruding from the driving part 413b is connected to the arrangement bar 412, and the base end moves horizontally in the driving part 413b, and descends or rises.

The impact load sensor unit 42 shown in FIG. 5 measures the load of the dropped weight unit 33 and notifies the measurement device 50 of the load.
The temperature sensor unit 43 shown in FIG. 7 measures the ambient temperature of the measurement environment and notifies the measurement device 50 of it. The distance sensor unit 44 detects rotation of a wheel for distance measurement called “fifth wheel” brought into contact with the wheel of the vehicle 20 and notifies the measurement device 50 of the rotation. In addition, regarding this “fifth wheel”, the connecting portion that is the central axis of the tractor and trailer is also referred to as the fifth wheel, but is different from this.

  The measuring device 50 shown in FIGS. 1, 2 and 7 measures the degree of deflection of the road. The measuring device 50 includes an interface unit 51 and a computer 52.

  The interface unit 51 receives analog signals from various sensors (the displacement meter 411, the impact load sensor unit 42, the temperature sensor unit 43, and the distance sensor unit 44), amplifies the analog signals, converts them into digital signals, and converts them into computers. The function to output to 52 is provided. In the present embodiment, the interface unit 51 communicates with the computer 52 through an interface such as USB or LAN.

  The computer 52 controls the loading device 30, the deflection sensor device 41, and the slide device 60, and inputs and accumulates data from various sensors as sensor information. The computer 52 can estimate the elastic coefficient of each layer of the paved road from the deflection curve based on the sensor information, and determine a place where repair is necessary.

The slide device 60 shown in FIG. 4 has a function of moving the loading device 30 in the left-right direction with respect to the traveling direction of the road. The slide device 60 includes a left / right moving cylinder portion 61 disposed along the left / right direction of the loading platform 21, and guide portions 62 provided in parallel to the left / right moving cylinder portion 61 and on both sides of the opening 21a. .
The left / right moving cylinder part 61 is connected to the base part 38 and moves the loading device 30 to the left and right. The guide part 62 is a rail that guides the left and right movement of the base part 38.

The operation and use state of the road inspection vehicle according to the embodiment of the present invention configured as described above will be described with reference to the drawings.
First, the work procedure will be described with reference to the flowchart shown in FIG. The measurer sets the “fifth wheel” in contact with the wheel of the vehicle 20 (step S10). Next, the measurer moves the road inspection vehicle 10 to the measurement location (step S20). When the road inspection vehicle 10 moves to the measurement location, the measurer starts measurement (step S30). The computer 52 measures the distance by counting the pulse signal corresponding to the rotation of the “fifth wheel” notified from the distance sensor unit 44 when the road inspection vehicle 10 moves to the measurement location.

  First, as shown in FIG. 9, the measurement is performed by the measurer operating the computer 52 to operate the slide device 60 shown in FIG. 4, and the loading device 30 positioned at the center of the loading platform 21 is moved to the loading platform 21. Slide to the right or left (step S100). When the loading device 30 is positioned on the left side of the loading platform 21, the left and right moving cylinder portion 61 shown in FIG. 4 contracts, and when the loading device 30 is positioned on the right side of the loading platform 21, the sliding device 60 operates. 61 extends. As the left / right moving cylinder portion 61 extends or contracts, the loading device 30 is guided by the guide portion 62 and slides. Accordingly, the loading device 30 slides until it is positioned on the extension line of the arrangement bar 412 corresponding to one of the two deflection sensor devices 41.

  Next, the measurer operates the computer 52 to instruct measurement preparation of the loading device 30. In preparation for measurement, first, the lift cylinder portion 35 is contracted to lower the entire loading device 30, and the loading leg portion 32 is lowered to ground the loading plate 31 to the pavement surface (step S110). At the same time, as shown in FIG. 6, the sensor moving mechanism 413 is operated, and the arrangement bar 412 in which the plurality of displacement meters 411 are arranged in a row is moved from the front position of the rear wheel drive shaft 22 at the initial position. Then, it is lowered below the rear wheel drive shaft 22 (arrow F1). Next, the rear wheel drive shaft 22 is moved backward (arrow F2). Then, it is further lowered (arrow F3). By these operations, the displacement meter 411 is grounded on the pavement surface (step S120).

Next, the measurer operates the computer 52 to extend the weight raising cylinder portion 34. When the weight raising cylinder part 34 is extended, the weight part 33 attracted to the electromagnetic chuck part 37 is raised together with the extension of the weight raising cylinder part 34 (step S130).
At this time, the height of the weight portion 33 by the weight raising cylinder portion 34 is adjusted according to the degree of the load applied to the road.

The computer 52 applies an impact by instructing the weight part 33 to drop automatically when the weight part 33 reaches the set height. The impact is applied by opening the electromagnetic chuck portion 37 to cause the weight portion 33 to fall and collide with the rubber buffer portion 36. Due to the collision of the weight portion 33 with the rubber buffer portion 36, an impact is transmitted from the rubber buffer portion 36 to the loading leg portion 32, and from the loading leg portion 32 to the loading plate 31 of the loading plate 31, via the loading plate 31. Then, an impact is applied to the road (step S140).
At this time, the load of the weight portion 33 dropped by the impact load sensor unit 42 is measured and notified to the measuring device 50 as impact load information.
The deflection of the road due to the applied impact is measured by a displacement meter 411 that is grounded to the pavement surface, and is notified to the measuring device 50 as deflection information.

In the computer 52 of the measuring device 50, the impact load information from the impact load sensor unit 42, the deflection information from the displacement meter 411, the temperature information from the temperature sensor unit 43, and the signal from the distance sensor unit 44 are counted and calculated. The distance information is accumulated as sensor information (step S150).
Then, the computer 52 estimates a place where repair is necessary from the deflection curve based on the sensor information and displays the result.

Returning to FIG. 8, when the measurement in step S30 ends, the measurer determines whether or not the specified number of times has ended (step S40). It is desirable that the measurement is performed twice or more in order to improve accuracy. In the present embodiment, the measurement is performed four times.
If the measurement in step S40 is less than the prescribed number, the measurer repeats the measurement in step S30. If the measurement for the specified number of times has been completed, the measurer operates the computer 52 to retract the loading plate 31 (step SS50). Retraction of the loading plate 31 contracts the weight raising cylinder portion 34 and contracts the lift cylinder portion 35 to raise the loading leg portion 32. And the slide apparatus 60 positions the loading apparatus 30 in the center part.

Next, the measurer determines whether or not all measurements have been completed (step S60). If the measurement location remains, the measurer moves the road inspection vehicle 10 to the next measurement location (step S20).
If it is determined in step S60 that all measurements have been completed, the “fifth wheel” is separated from the wheels of the vehicle 20 and the operation is terminated (step S70).

  If the slide device 60 has slid the loading device 30 to the right side of the loading platform 21 in step S100, the measurement on the left side with respect to the traveling direction of the road has not been performed, so that the slide device 60 returns to the first measurement location. Thus, the loading device 30 is slid to the left side of the loading platform 21 and measured again.

  As described above, according to the road inspection device mounted on the road inspection vehicle 10 according to the present embodiment, the loading device 30 that applies an impact to the road is moved between the right side and the left side of the lane by the slide device 60. Since the vehicle 20 can move, the loading device 30 can be moved to the right or left side of the lane even when the vehicle 20 is in the center in the width direction of the lane.

In addition, since two deflection sensor devices 41 are installed corresponding to when the loading device 30 is positioned on each of the right side and the left side by the slide device 60, the deflection device 30 is placed on either the right side or the left side. It is not necessary to bring the deflection sensor device 41 together when moving.
Further, if the deflection sensor device 41 moves in accordance with the slide of the loading device 30, the rear wheel drive shaft located at the center of the vehicle 20 will be in the way, but the two deflection sensor devices 41 are installed. Further, since it is not necessary to move the deflection sensor device 41, the rear wheel drive shaft does not get in the way.

  Since the deflection sensor device 41 is installed at the bottom of the vehicle 20 and the loading device 30 and the slide device 60 are installed on the loading platform 21 of the vehicle 20 located behind the rear wheel, the slide of the loading device 30 is not shown. Since it is performed behind the rear wheel drive shaft, the rear wheel drive shaft 22 does not interfere with the movement of the displacement meter 411 even if the loading leg portion 32 protrudes and moves from the opening 21a.

  In addition, even if the initial position of the displacement sensor 411 is at the front position of the rear wheel driving shaft 22 of the rear wheel 20 of the vehicle 20, the deflection sensor device 41 has a plurality of displacement gauges 411. Since it is lowered below the rear wheel drive shaft 22 from the front position of the rear wheel drive shaft 22 and moved rearward, which is the lower position of the rear wheel drive shaft 22, it is further lowered and brought into contact with the pavement surface. Even if the plurality of displacement meters 411 are arranged in a line, the rear wheel drive shaft 22 does not interfere with the movement of the displacement meters 411.

In the deflection sensor device 41 shown in FIG. 6, the displacement meter 411 is moved downward to a position where the rear wheel drive shaft 22 does not get in the way and then moved backward. In the deflection sensor device 41x shown in FIG. 10, the displacement meter 411 can be moved backward while being lowered.
The deflection sensor device 41x includes a frame portion 414a, a drive cylinder 414b, and a link mechanism portion 414c in addition to the displacement meter 411 and the arrangement bar 412, and functions as a sensor moving mechanism portion.

The frame portion 414a moves in an arc between the front position and the lower position of the rear wheel drive shaft 22 by the expansion and contraction of the drive cylinder 414b. The drive cylinder 414b expands and contracts to move the frame portion 414a in an arc. The link mechanism portion 414c is formed in an X shape, and expands and contracts between the frame portion 414a and the arrangement bar 412 to ground or displace the displacement meter 411 on the pavement surface.
In this way, even if the deflection sensor device 41x is formed, the plurality of displacement meters 411 are moved from the front position of the rear wheel drive shaft 22 from the rear wheel drive shaft 22 as shown by the arrow F4 shown in FIG. As shown by the arrow F5, the rear wheel drive shaft 22 can be lowered and further lowered to be grounded on the pavement surface as indicated by an arrow F5. Does not obstruct the movement of the displacement meter 411.

  In the present embodiment, the road measuring device is mounted on the vehicle 20, but like the mobile road surface deflection measuring device described in Patent Document 1, the vehicle is towed by the vehicle towing the road measuring device of the present invention. You may mount in a vehicle (cart). Moreover, in this Embodiment, although the road measuring apparatus is installed in the rear part of the loading platform 21, you may install in the front part of the loading platform.

  The road inspection device of the present invention is suitable for inspection of roads on which highways and ordinary roads are paved.

DESCRIPTION OF SYMBOLS 10 Road inspection vehicle 20 Vehicle 21 Loading platform 21a Opening part 22 Rear wheel drive shaft 30 Loading device 31 Loading plate 32 Loading leg part 33 Weight part 34 Weight raising cylinder part 35 Lift cylinder part 36 Rubber buffer part 37 Electromagnetic chuck part 38 Base Base unit 40 Sensor device 41, 41x Deflection sensor device 411 Displacement meter 412 Arrangement bar 413 Sensor moving mechanism unit 413a Frame unit 413b Drive unit 414a Frame unit 414b Drive cylinder 414c Link mechanism unit 42 Impact load sensor unit 43 Temperature sensor unit 44 Distance sensor Unit 50 measuring device 51 interface unit 52 computer 60 slide device 61 left and right moving cylinder unit 62 guide unit F1 to F5 arrow

Claims (3)

A loading device for applying an impact to the road;
Measuring the degree of deflection of the road due to the impact from the loading device, the deflection sensor device installed at the bottom of the vehicle ;
A sliding device that moves the loading device in the left-right direction with respect to the traveling direction of the road, the deflection sensor device includes a displacement meter that measures the deflection of the road;
The displacement meter is lowered from the front position of the rear wheel drive shaft of the vehicle to a position lower than the rear wheel drive shaft, and further moved downward to the lower position of the rear wheel drive shaft. A road inspection apparatus comprising: a sensor moving mechanism section that is grounded on a paved surface .   2. The road inspection device according to claim 1, wherein two of the deflection sensor devices are installed correspondingly when the loading device is positioned on each of the right side and the left side by the slide device.   The road inspection device according to claim 1 or 2, wherein the loading device and the sliding device are installed on a loading platform of the vehicle located behind a rear wheel of the vehicle.

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