JPH0762610B2 - Road surface profile measuring device and its measuring method - Google Patents

Description

The present invention relates to a road surface profile measuring device.

[Problems to be Solved by Conventional Techniques and Inventions]

If unevenness is formed on the road surface due to road surface wear due to a vehicle equipped with spiked tires, large trucks, etc., or wavy (rut) phenomenon, in order to correct this unevenness, in that case, measure the road surface profile. There is a need.

Therefore, when measuring the profile of the road surface, that is, the shape of the outer contour of the road surface in the direction crossing the road surface, conventionally, the measurement has been performed with a measuring device as shown in FIG.

That is, this measuring device is provided with a carriage a and a height detecting means b provided at the center of the lower surface of the carriage a,
As shown in FIG. 8, the carriage a is run in a direction orthogonal to the longitudinal direction of the road surface c as indicated by an arrow, and the detecting means b detects the displacement amount of the road surface c. Here, the detection means b has a roller d that rolls on the road surface c, and the roller d is held by a holding body e pivotally attached to the lower surface of the carriage a,
The height position of the road surface c of the portion in contact with the roller d is detected.

Therefore, in this case, the detected height position is the moving wheel f.
Since the reference surface is formed with respect to the reference surface, and the road surface c has irregularities, the reference surface changes depending on the position of the carriage a, and the detected data becomes inaccurate. As shown in FIG. 8, since the carriage a is run in the lateral direction orthogonal to the longitudinal direction of the road surface c at the measurement portion at a predetermined equal pitch along the longitudinal direction of the road surface c. The trolley a has to be moved in the lateral direction as indicated by the arrow at regular intervals, which requires a long time for the measurement work. In FIG. 7, g is a recorder mounted on the carriage a, on which detection data is recorded.

Therefore, it is an object of the present invention to provide a road surface surface shape measuring apparatus capable of measuring the surface shape of a road surface with high accuracy and in a short time.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, a road surface profile measuring apparatus according to the present invention comprises a bogie that travels on a road surface to be measured along a longitudinal direction of the road surface; the bogie is parallel to the running direction of the bogie. A horizontal horizontal member whose one end is pivotally attached so as to be swingable about a horizontal axis; a detector that detects the inclination of the horizontal member with respect to the horizontal plane; and a detector that is connected to the other end of the horizontal member. A horizontal holding mechanism including a vertical movement mechanism for vertically holding the horizontal member by swinging the other end vertically according to a detection signal from the detector; and a longitudinal direction of the horizontal member on the horizontal member. A plurality of height detecting means are provided along a predetermined pitch to detect the height position of the road surface with respect to the horizontal member at a plurality of positions at the predetermined pitch; Laser light that irradiates the above trolley with various laser beams A light projecting device; a level detecting device that receives a laser beam from the laser beam projecting device and detects a height position of the horizontal member with respect to the reference plane; a traveling distance detecting device that detects a traveling distance of the carriage; Each time the travel distance detected by the travel distance detecting means reaches a predetermined value, the height position of the horizontal member with respect to the reference plane set by the level detecting means and the height of the road surface relative to the horizontal member by the height detecting means. Calculating means for calculating the amount of displacement of the road surface with respect to the set reference surface based on the position.

Further, the road surface shape measuring method according to the present invention, a dolly traveling on the road surface to be measured along the longitudinal direction of the road surface,
A horizontal member is provided along the horizontal direction orthogonal to the traveling direction, the horizontal member is always held horizontally by a horizontal holding mechanism, and the carriage is irradiated with a laser beam parallel to a set reference plane, And, the traveling distance of the carriage is detected by the traveling distance detecting means, and every time the traveling distance of the carriage reaches a predetermined value, the height position of the horizontal member with respect to the reference plane is determined based on the laser beam. A plurality of height detecting means are provided on the horizontal member at a predetermined pitch along the longitudinal direction of the horizontal member, and at a plurality of positions at the predetermined pitch along the lateral direction of the road surface. Detecting the height position of the road surface with respect to the horizontal member, and based on the height position of the road surface with respect to the horizontal member and the height position of the horizontal member with respect to the reference surface, the predetermined along the lateral direction of the road surface. Multiple per pitch It is intended for calculating the amount of displacement of the road surface with respect to at the reference plane at.

[Work]

According to the above-mentioned device, since the horizontal member is always held horizontally by the horizontal holding mechanism, it is possible to accurately detect the height position of the road surface with respect to the horizontal member at predetermined pitches along the longitudinal direction of the horizontal member. Therefore, the surface shape of the road surface in the lateral direction (direction orthogonal to the longitudinal direction) can be measured. Moreover, since the measured value is based on the reference surface that does not change, if the road surface is inclined, the degree of inclination is also measured by detecting the height position from the reference surface. You can and be accurate. Further, since it is possible to run the cart on the road surface and measure the surface shape in the lateral direction for each predetermined traveling distance, it is possible to measure the shape of almost the entire road surface.

Further, according to the above measuring method, since the horizontal member is always held horizontally by the horizontal holding mechanism, the surface shape of the road surface in the lateral direction (direction orthogonal to the longitudinal direction) can be accurately measured. In addition, when the trolley is run along the longitudinal direction on the road surface to be measured, the mileage is detected by the mileage detecting means, and when the mileage is traveled for a predetermined distance, the signal from the level detecting means and the height Since the displacement amount of the road surface with respect to the reference surface can be calculated based on the signal from the detecting means, the lateral surface shape can be accurately measured at every predetermined interval in the traveling direction. Therefore, almost the entire shape of the road surface can be measured.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating examples.

FIG. 1 shows a measuring apparatus according to the present invention, which comprises a carriage 2 traveling on a road surface 1 to be measured, and a laser beam projector 3 for irradiating a laser beam toward the carriage 2.
The trolley 2 travels on the road surface 1 in the direction of arrow A along the longitudinal direction as shown in FIG. 4, and the lateral direction (direction of arrow B) (direction orthogonal to the longitudinal direction) of the road surface 1 at predetermined intervals. The surface shape is measured.

Then, the carriage 2 is provided with a horizontal member 5 which is always held horizontally through the horizontal holding mechanism 4, and the horizontal member 5 is provided with a height position of the surface of the road surface 1 with respect to the horizontal member 5.
A plurality of height detecting means 21 for detecting at predetermined intervals in the longitudinal direction of the horizontal member 5 are provided. In other words, this device is arranged on the horizontal member 5 along the longitudinal direction of the horizontal member 5 at a predetermined pitch, and the height position of the surface of the road surface 1 with respect to the horizontal member 5 is set at predetermined pitches. The detection means 21 for detecting at a plurality of locations is provided.

Here, the horizontal member 5 is composed of a beam-like member arranged in a direction orthogonal to the traveling direction of the carriage 2, and one end portion 5a of the horizontal member 5 is pivotally pivoted on a pivot shaft 7 provided on the carriage 2. The horizontal member 5 swings around the one end 5a as shown by arrows C and D.

That is, this apparatus is provided with a horizontal member 5 on the bogie 2 to which one end 5a is pivotally mounted so as to be swingable around an axis parallel to the traveling direction of the bogie 2. Further, the detector 16 for detecting the inclination of the horizontal member 5 with respect to the horizontal plane is connected to the other end 5b of the horizontal member 5, and the detection signal from the detector 16 shakes the other end 5b up and down. A horizontal holding mechanism 4 including a vertical movement mechanism 8 that moves the horizontal member 5 and always holds the horizontal member 5 horizontally is provided. Specifically, the other end of the horizontal member 5
A vertical movement mechanism 8 for vertically swinging the other end portion 5b is connected to the 5b, and the vertical movement mechanism 8 is driven when the horizontal member 5 is tilted with respect to a horizontal plane. The other end 5b is moved up and down to make the horizontal member 5 horizontal. That is, the vertical movement mechanism 8 includes a motor 9 attached to the carriage 2, a shaft 10 rotated by rotation of an output shaft of the motor 9, and the shaft 10.
And a nut member 11 that is screwed into the nut member 11, and the nut member 11 and the other end portion 5b of the horizontal member 5 are pivotally connected to each other via a connecting body 12. A pulley 13 is attached to the output shaft of the motor 9, a pulley 14 is attached to the base end of the shaft 10, and a coupling member 15 such as a belt is locked to the pulleys 13 and 14.

Therefore, when the motor 9 is driven and the output shaft rotates, the shaft 10 rotates and the nut member 11 screwed onto the shaft 10 moves up and down, and the horizontal member 5 is centered on the one end 5a. Swing as shown by arrows C and D.

Further, a detector 16 for detecting the inclination of the horizontal member 5 with respect to the horizontal plane is attached to the horizontal member 5, and a detection signal from the detector 16 is input to the up-and-down moving mechanism 8, and a motor is generated based on this detection signal. The output shaft 9 is rotated to swing the horizontal member 5. That is, as shown in the flow chart of FIG. 6, the detector 16 detects the inclination of the horizontal member 5 with respect to the horizontal plane, and if it is inclined, the vertical movement mechanism 8 is driven to make the horizontal member 5 horizontal, If not, the up-and-down moving mechanism 8 is not driven, and detection by the detector 16 is performed subsequently. Therefore, the detector 16 and the vertical movement mechanism 8 form the horizontal holding mechanism 4, and the horizontal holding mechanism 4 keeps the horizontal member 5 horizontal.

Further, in this case, the height detecting means 21 includes a plurality of slide bodies 6 ... Which move vertically in the vertical direction. As shown in FIG. 2, the slide body 6 includes a slide bar 18 which is slidably inserted into a vertical through hole 17 of the horizontal member 5.
And a roller 19 attached to the lower end of the slide bar 18,
A weight portion 20 attached to the upper end of the slide bar 18 and a slide bar position detector 22 are provided, and the slide bar 18 constantly contacts the road surface 1. That is, the height detecting means 21 is capable of detecting the amount of displacement of the slide bar 18 with respect to the set reference value, and as shown in FIG. A calculator 24 is further provided, which compares the data from the slide bar position detector 22 with a reference value stored in the storage means 23 and calculates a displacement amount with respect to the reference value.

Then, the horizontal member 5 receives the laser beam parallel to the set reference plane S (see FIG. 3) from the laser beam projector 3 and determines the height position of the horizontal member 5 with respect to the set reference plane S. Level detecting means 25 for detecting is provided. That is, the level detecting means 25 is a light receiving unit that receives a laser beam.
26 and a vertical movement mechanism 27 for automatically moving the light receiving unit 26 up and down according to a signal from the light receiving unit 26, and the laser beam is always applied to the center of the light receiving unit 26. In addition, the light receiving unit 26
Is a plurality of light receiving elements such as phototransistors arrayed in the vertical direction. The vertical movement mechanism 27 includes a shaft 28, a holding frame 29 that holds the shaft 28, and a motor 30 that rotates the shaft 28. And a detector 31 such as a rotary encoder attached to one end of the shaft 28, and is supported by a support leg 32 erected from the horizontal member 5. That is, the position of the light receiving unit 26 that moves up and down by the rotation of the shaft 28 is detected by the detector 31 (light receiving unit position detector).
5, the output signal from the detector 31 and the set value from the storage means 34 that stores the reference plane S set value are calculated by the calculator 33. Then, the calculator 33 calculates the height position of the horizontal member 5 with respect to the reference plane S.

Further, the trolley 2 is provided with a mileage detecting means 35 for detecting the mileage of the trolley 2, so that the mileage of the trolley 2 can be detected. That is, the traveling distance detecting means 35 includes a roller 36 that rolls on the road surface 1, and a rotary encoder 37 that detects the number of rotations of the roller 36.
The traveling distance of the carriage 2 is detected by detecting the number of rotations of the roller 36. Even when the roller 36 is attached to the rocking member 38 attached to the carriage 2 and has an uneven portion on the road surface 1, the roller 36 moves up and down corresponding to the uneven portion and always contacts the road surface 1.

Then, the output signals of the level detecting means 25, the height detecting means 21, and the traveling distance detecting means 35 are input to the calculating means 39 as shown in FIG. 5, and the calculating means 39 causes the traveling distance detecting means 35 to operate. When the mileage detected at
Based on the signal from the level detecting means 25 and the signal from the height detecting means 21, the displacement amount of the surface of the road surface 1 with respect to the reference surface S, that is, the road surface contact point K of each slide body 6 ... (Second
The height position of the reference surface S) is calculated. That is, as shown in FIG. 3, the height dimension H of the road surface 1 with respect to the reference surface S at a predetermined equal pitch along the lateral direction of the road surface 1 ...
Can be detected, and the surface shape of the road surface 1 can be measured. In this case, the reading timing of the level detecting means 25 and the height detecting means 21 can be set by the traveling distance detecting means 35. For example, when it is desired to measure the surface shape of the road surface 1 at a pitch of 50 cm, every time the carriage 2 travels 50 cm, a signal is sent from the running distance detecting means 35, and at the time when this signal is sent, the level detecting means 25 and the height detecting means are detected. The detection signal of the means 21 is read and calculation is performed.

The calculated measured value is stored and displayed in the display storage means 40.

Therefore, according to the measuring device configured as described above, while the carriage 2 is traveling in the longitudinal direction of the road surface 1 (direction of arrow A shown in FIG. 4), the carriage 2 is moved in the lateral direction (arrow direction) of the road surface 1 at predetermined equal pitches. The surface shape in the B direction) can be measured.

It should be noted that the present invention is not limited to the above-described embodiments, and design changes can be freely made without departing from the scope of the present invention. For example, the arrangement pitch and the number of slide bodies 6 can be freely changed.
In the embodiment, the slide body 6 has the roller 19 in contact with the road surface 1 by the weight of the weight portion 20 and the slide bar 18, but the slide body 6 is provided with an elastic member such as a spring.
It is also free that the slide body 6 is constantly pressed downward so that the roller 19 is always in contact with the road surface 1. Furthermore, the roller 19 may be replaced with a sliding member that slides on the road surface 1. Further, as the height detecting means 21, without using the slide body 6, the light is projected toward the road surface 1 and the light reflected by the road surface 1 is received, whereby the surface of the road surface 1 is obtained. It is also preferable to use several optical displacement sensors or the like that detect the vertical position with respect to the horizontal member 5 in parallel. Further, the trolley 2 may be a push-pull type, but is preferably a self-propelled trolley line 41 (see FIG. 4).
Is set so that the vehicle travels in the longitudinal direction (direction of arrow A) along.

〔The invention's effect〕

Since the present invention is configured as described above, it has the significant effects described below.

The height position of the surface of the road surface 1 with respect to the reference plane S is
It is possible to detect accurately and instantaneously at a plurality of positions at a predetermined pitch along the lateral direction (direction orthogonal to the longitudinal direction).

The lateral surface shape of the road surface 1 can be measured one after another for each predetermined distance of the road surface 1. As a result, the surface shape can be measured over almost the entire road surface 1.

[Brief description of drawings]

FIG. 1 is a simplified perspective view of an embodiment of the present invention, FIG. 2 is an enlarged sectional view of an essential part, FIG. 3 is a sectional view of a road surface, FIG. 4 is a simplified plan view of the road surface, and FIG. 5 is a block diagram. FIG. 6 is a flowchart. FIG. 7 is a simplified front view of a conventional example, and FIG. 8 is a simplified plan view of a road surface. 1 ... Road surface, 2 ... Truck, 3 ... Laser beam projector, 4
…… Horizontal holding mechanism, 5 …… Horizontal member, 6 …… Slide body, 21 …… Height detection means, 25 …… Level detection means, 35 ・ ・ ・
... running distance detecting means, 39 ... computing means, K ... road surface contact point, S ... reference plane.

Claims (2)

[Claims] 1. A trolley 2 capable of traveling on a road surface 1 to be measured along a longitudinal direction of the road surface 1, and one end of the trolley 2 which is swingable about an axis parallel to the traveling direction of the trolley 2. A horizontal member 5 in which the portion 5a is pivotally attached and a detector 16 for detecting the inclination of the horizontal member 5 with respect to the horizontal plane.
And a vertical movement which is connected to the other end 5b of the horizontal member 5 and vertically swings the other end 5b in response to a detection signal from the detector 16 to keep the horizontal member 5 always horizontal. Mechanism 8;
A plurality of horizontal holding mechanisms 4 are provided on the horizontal member 5 along the longitudinal direction of the horizontal member 5 at a predetermined pitch, and the height position of the surface of the road surface 1 with respect to the horizontal member 5 is set to the predetermined position. Height detection means 21 for detecting at a plurality of points for each pitch, a laser beam projector 3 for irradiating the carriage 2 with a laser beam parallel to the set reference plane S, and a laser from the laser beam projector 3. Level detecting means 25 for receiving the light beam and detecting the height position of the horizontal member 5 with respect to the setting reference plane S, and traveling distance detecting means 35 for detecting the traveling distance of the carriage 2.
Every time the traveling distance detected by the traveling distance detecting means 35 reaches a predetermined value, the height position of the horizontal member 5 with respect to the reference plane S set by the level detecting means 25 and the height detecting means 21 are detected. A road surface shape measuring apparatus comprising: a calculation unit 39 for calculating the amount of displacement of the surface of the road 1 with respect to the set reference surface S based on the height position of the surface of the road 1 with respect to the horizontal member 5. 2. A horizontal member 5 is attached to a carriage 2 that travels on the road surface 1 to be measured along the longitudinal direction of the road surface 1, and the horizontal member 5 is attached along the horizontal direction orthogonal to the running direction.
Is always held horizontally by the horizontal holding mechanism 4, a laser beam parallel to the set reference plane S is applied to the carriage 2, and the traveling distance of the carriage 2 is detected by the traveling distance detecting means 35. Then, each time the traveling distance of the carriage 2 reaches a predetermined value,
The height position of the horizontal member 5 with respect to the reference plane S is detected based on the laser beam, and the horizontal member 5 is detected.
A plurality of height detecting means 21 are provided along the longitudinal direction of the horizontal member 5 at a predetermined pitch, and the horizontal members are provided at a plurality of positions at the predetermined pitch along the lateral direction of the road surface 1. 5, the height position of the surface of the road surface 1 with respect to 5 is detected, and based on the height position of the surface of the road surface 1 with respect to the horizontal member 5 and the height position of the horizontal member 5 with respect to the reference plane S, the direction along the lateral direction of the road surface 1 is determined. A method of measuring a road surface shape, which comprises calculating displacements of the surface of the road surface 1 with respect to the reference surface S at a plurality of positions at predetermined pitches.