Vehicle-mounted measurement target

Abstract

To provide a vehicle-mounted measurement target in which a measurement target for reflecting a measurement light beam emitted from a measurement instrument to the measurement instrument is mounted on a wheeled land mobile body, and the measurement target can be maintained in a vertical posture.SOLUTION: A vehicle-mounted measurement target 1 includes wheels 3, an axle 4, a balancing device 5, a weight body 6, and a measurement target 2. The wheels 3 are vehicle members that cause the vehicle-mounted measurement target 1 to travel. The axle 4 is a shaft member that allows the wheels 3 to rotate. The balancing device 5 is a device that balances the weight body 6 and the measurement target 2, includes the axle 4 inserted therethrough, and is configured to rotate about the axle 4. The weight body 6 is provided on one side with respect to the axle 4, and the measurement target 2 is provided on the other side. The weight body 6 causes the balancing device 5 to rotate so that a side on which the weight body is installed is positioned vertically downward and a side on which the measurement target is installed is positioned vertically upward.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a vehicle-mounted measurement target mounted on various wheeled land vehicles such as handcarts (carts, hand trucks) and radio-controlled vehicles (RC cars) as a measurement target for reflecting measurement light emitted from measurement equipment such as a prism mirror for information-based construction back to the measurement equipment. [Background technology]

[0002] The vehicle-mounted measurement target of the present invention is intended to be mounted on various wheeled land vehicles such as those described above, but in this application, we will particularly use a wheelbarrow as the wheeled land vehicle and explain the vehicle-mounted measurement target as an example, in which a prism mirror for information construction is mounted on the wheelbarrow as the measurement target.

[0003] Recently, information-based construction has been promoted in various civil engineering fields such as road construction, river construction, and forestry conservation work. Information-based construction here refers to the use of information and communication technology (ICT) and RTK-GNSS (Real Time Kinematic-Global Navigation Satellite Systems) to carry out these types of civil engineering works more efficiently and safely, while also achieving more accurate construction results.

[0004] The following describes the above-mentioned information-based construction, taking as an example the case of performing preliminary measurements for road paving work. First, a measurement device installation tool, such as a tripod, is installed at a predetermined location, and a measurement device called a total station (TS) is attached to the measurement device installation tool. Next, a handcart equipped with a prism mirror, which serves as the measurement target for the information-based construction, is driven to the location where the preliminary measurement will be performed. During this process, a laser beam is emitted from the total station toward the prism mirror, and the total station measures the distance and angle based on the light reflected from the prism mirror. A computer then calculates the three-dimensional coordinates of the prism mirror to measure its position. This measurement method utilizing information and communication technology enables more accurate, efficient, and safer measurements than conventional manual measurements.

[0005] As a measurement method utilizing information and communication technology using such vehicle-mounted measurement targets, for example, a road shape measurement method has been proposed (see Patent Document 1 below), in which an electronic staff is mounted on a cart capable of measuring the distance traveled and the angle of inclination, an electronic level is installed on the road, and the cart is moved to the desired location for road shape measurement, and each time the cart moves a predetermined distance greater than the distance between the front and rear wheels of the cart, the height of the electronic staff at that time is measured to calculate the height from a reference position on the road surface to be measured, and each time the cart moves the distance between the front and rear wheels, the inclination angle of the cart is measured at that time, and the difference in road elevation between the front and rear wheels of the cart at that time is calculated from that inclination angle, and the road height calculated by sequential measurements using the electronic level and electronic staff is used as a reference, and the difference in road elevation calculated from the inclination angle of the cart until the next measurement point with the electronic level and electronic staff is used as the amount of change in road shape, and the road shape is determined by combining these methods in succession.

[0006] Furthermore, as an on-vehicle measurement target used in the measurement method utilizing information and communication technology as described above, a road surface roughness measurement device has been proposed (see, for example, Patent Document 2 below), in which a towed vehicle equipped with a laser beam receiver is mounted on a towing vehicle so that it can swing up and down, a buffer member is provided over the towed vehicle on the towing vehicle, and a laser beam projector is provided that emits a laser beam to the laser beam receiver.Furthermore, a straightness measurement device has also been proposed (see, for example, Patent Document 3 below), in which the straightness measurement device includes a housing that is self-propelled over the object to be measured and on which a reflective mirror is mounted, an autocollimator installed separately from the housing, and an analytical computer that processes travel distance data of the housing and tilt data from the autocollimator to calculate the straightness of the object to be measured, the housing having tires on the bottom side, the travel distance of the housing being determined by the rotation of the tires, and the travel distance being input into the analytical computer to calculate the position of the housing on the object to be measured. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 11-100809 [Patent Document 2] Japanese Patent Application Publication No. 56-051011 [Patent Document 3] Patent Publication No. 2009-300180 Summary of the Invention [Problem to be solved by the invention]

[0008] Here, when performing measurements using the above-mentioned information and communication technology, by placing the prism mirror in a vertical position, it is possible to fully receive the laser beam emitted from the total station and fully reflect it back to the total station.

[0009] However, simply mounting a prism mirror on a handcart poses the problem of tilting the prism mirror if the surface on which the vehicle-mounted measurement target is traveling is inclined or uneven. That is, if a prism mirror is fixed to a handcart, the prism mirror will tilt in the opposite direction to the traveling direction if the vehicle-mounted measurement target is traveling uphill, and will tilt in the opposite direction to the traveling direction if the vehicle-mounted measurement target is traveling downhill. As a result, when a laser beam is irradiated from the total station toward the prism mirror, the prism mirror cannot sufficiently reflect the beam toward the total station, which causes the total station to be unable to adequately measure the distance and angle between the prism mirror and the prism mirror.

[0010] Furthermore, if the prism mirror in the wheeled land vehicle tilts, there will be a difference in the distance between the prism mirror and the running surface on which the vehicle-mounted measurement target travels when it is in a vertical position and when it is in an inclined position, which creates the problem of being unable to make accurate measurements.

[0011] In this regard, the above-mentioned prior art measurement methods utilizing information and communication technology using a vehicle-mounted measurement target, and the vehicle-mounted measurement targets used in the measurement methods utilizing information and communication technology, do not propose maintaining the measurement target in a vertical position so as to sufficiently receive and reflect the measurement light irradiated from the measurement instrument. Therefore, the problem to be solved by the present invention is to provide a vehicle-mounted measurement target that can maintain a vertical position for a vehicle-mounted measurement target mounted on a wheeled land vehicle to reflect the measurement light irradiated from the measurement instrument back to the measurement instrument. [Means for solving the problem]

[0012] The present invention has been proposed to solve the above problems and has the following configuration. In the following, the numbers and symbols shown in the drawings attached to this application will be used to assist in understanding the configuration of the present invention.

[0013] The vehicle-mounted measurement target (1) according to claim 1 is a vehicle-mounted measurement target mounted on a wheeled land vehicle and configured to reflect a measurement beam emitted from a measurement instrument (A) back to the measurement instrument (A), and includes wheels (3), axles (4), a balancing device (5), a weight (6), and the measurement target (2). The wheels (3) are vehicle components for driving the vehicle-mounted measurement target (1) to a location where measurement using the measurement target (2) is performed. The axles (4) are shaft members for rotating the wheels (3) and are formed of rod-shaped members. The balancing device (5) is a device for balancing the weight (6) and the measurement target (2), with the axles (4) inserted therein and rotating about the axles (4). The weight (6) is provided on one side of the axles (4) and the measurement target (2) is provided on the other side. The weight (6) is a balance weight for rotating the balancing device (5) so that the weight installation side is positioned vertically downward and the measurement target installation side is positioned vertically upward.

[0014] The vehicle-mounted measurement target of claim 2 is the vehicle-mounted measurement target described in claim 1, in which the weight (6) and / or the measurement target (2) are structured to be detachable from the balancing device (5).

[0015] The vehicle-mounted measurement target of claim 3 is a vehicle-mounted measurement target described in claim 1 or 2, and is equipped with a handle (7) that a user can hold in their hand to operate the vehicle-mounted measurement target. [Effects of the Invention]

[0016] The vehicle-mounted measurement target according to the present invention has the above-described configuration and can therefore achieve the following effects.

[0017] First, in the vehicle-mounted measurement target (1) described in claim 1, the weight of the weight (6) rotates the balancing device (5) around the axle (4) as an axis, so that the weight installation side can be positioned vertically downward and the measurement target installation side can be positioned vertically upward. Therefore, even if the place where the vehicle-mounted measurement target (1) travels is inclined or has unevenness, the weight of the weight (6) rotates the balancing device (5) around the axle (4) as an axis by its weight, so that the measurement target (2) can be kept in a vertical position.

[0018] Therefore, the vehicle-mounted measurement target described in claim 1 can solve the problem that the present invention aims to solve, which is to provide a vehicle-mounted measurement target that can maintain a vertical position, for a vehicle-mounted measurement target that is mounted on a wheeled land vehicle and that reflects measurement light irradiated from a measurement instrument back to the measurement instrument.

[0019] In this way, the vehicle-mounted measurement target (1) can fully receive the measurement light irradiated from the measurement instrument (A) and fully reflect it back to the measurement instrument (A). In addition, since the measurement target (2) can be maintained in a vertical position, the distance between the measurement target (2) and the traveling surface on which the vehicle-mounted measurement target travels can be maintained constant.

[0020] Furthermore, if the measurement target in a vehicle-mounted measurement target is simply made swingable, there is a risk that the measurement target will swing significantly due to inertia, particularly when the vehicle-mounted measurement target is started and stopped, making accurate measurements impossible. However, with the vehicle-mounted measurement target (1), if the measurement target (2) tries to tilt, the measurement target (2) can be immediately returned to a vertical position like a toy doll, so that the measurement target (2) does not swing significantly due to inertia, particularly when the vehicle-mounted measurement target (1) is started and stopped, and accurate measurements can be made.

[0021] Next, the vehicle-mounted measurement target (1) described in claim 2 is structured so that the weight (6) and / or measurement target (2) can be attached and detached from the balancing device (5), which is advantageous because it allows the type of weight (6) or the model of measurement target (2) to be changed, or the weight (6) or measurement target (2) to be replaced in the event of a malfunction, etc.

[0022] Furthermore, the vehicle-mounted measurement target (1) described in claim 3 is equipped with a handle (7) that the user (B) can hold in his / her hand to drive the vehicle-mounted measurement target (1), which is preferable when the wheeled land vehicle carrying the measurement target (2) is a pushcart, as this makes it easier for the user (B) to drive the vehicle-mounted measurement target (1). [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a front view of a vehicle-mounted measurement target according to the present invention; [Figure 2] 1 is a partially perspective view illustrating a state in which a vehicle-mounted measurement target according to the present invention is used; FIG. [Figure 3] 1 is a partial perspective view illustrating the operation and effect of a vehicle-mounted measurement target according to the present invention; FIG. [Figure 4] 1 is a partial perspective view illustrating the operation and effect of a vehicle-mounted measurement target according to the present invention; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0024] The structure of a vehicle-mounted measurement target (1) according to one embodiment of the present invention will be described below with reference to the accompanying drawings. The vehicle-mounted measurement target according to the present invention is intended for mounting various measurement targets, such as a prism mirror for information-based construction, on various wheeled land vehicles, such as handcarts (carts, hand trucks) and radio-controlled vehicles (radio-controlled cars). Therefore, the following description will be given taking a wheelbarrow as the wheeled land vehicle and an example of a vehicle-mounted measurement target mounted with a prism mirror for information-based construction as the measurement target, but the present invention is not limited to such a structure.

[0025] As shown in Figure 1, the vehicle-mounted measurement target (1) is a vehicle-mounted measurement target mounted on a wheeled land vehicle and having a measurement target (2) for reflecting the measurement light emitted from the measurement device (A) back to the measurement device (A), and has wheels (3), axles (4), a balancing device (5), a weight (6), the measurement target (2), and a handle (7).

[0026] The wheels (3) are vehicle components for driving the vehicle-mounted measurement target (1) to the location where measurements are to be taken using the measurement target (2), as shown in Figure 1. In the figure, the vehicle-mounted measurement target (1) has two wheels (3), one on each end of the axle (4), but the shape and number of wheels are not limited to this.

[0027] The axle 4 is a shaft member for rotating the wheels 3, and is formed of a rod-shaped member, as shown in Figure 1. More specifically, the axle 4 is a metal rod-shaped member that passes through the centers of the two wheels 3, with one wheel 3 attached to each end of the axle 4, but is not limited to this particular form.

[0028] 1, the balancing device 5 is a device for balancing the weight 6 and the measurement target 2, with the axle 4 inserted therein and rotating around the axle 4, with the weight 6 provided on one side of the axle 4 and the measurement target 2 provided on the other side. More specifically, the balancing device 5 is a roughly cubic metal member with a through hole drilled through which the axle 4 passes, but is not limited to this form.

[0029] As shown in Figure 1, the weight 6 is a balancing weight that rotates the balancing device 5 so that the weight-mounting side is positioned vertically downward and the measurement target-mounting side is positioned vertically upward. More specifically, the weight 6 can be a cylindrical metal member, but is not limited to such a form. Furthermore, the weight 6 can be configured to be detachable from the balancing device 5 by providing a female thread on the balancing device 5 and a male thread on the weight 6.

[0030] As shown in the figure, the measurement target (2) is an object for reflecting the measurement light beam emitted from the measurement device (A) back to the measurement device (A). More specifically, the measurement target (2) may be a prism mirror used in various known information-based construction projects, but is not limited to this. In addition, the measurement target (2) may be configured to be detachable from the balancing device (5) by providing a female thread on the balancing device (5) and a male thread on the measurement target (2).

[0031] As shown in the figure, the handle (7) is a member that the user (B) holds in his / her hand to operate the vehicle-mounted measurement target (1). More specifically, the handle (7) is a long rod-shaped member that is attached to the axle (4), but is not limited to such a form. If the handle (7) is an extendable rod-shaped member, it is preferable because the distance between the user (B) and the vehicle-mounted measurement target (1) can be adjusted appropriately.

[0032] The above is a description of the structure of the vehicle-mounted measurement target (1) according to one embodiment of the present invention. The following describes how to use the vehicle-mounted measurement target (1) according to one embodiment of the present invention, based on the accompanying drawings. The following description will be given taking as an example a case where a wheelbarrow is used as a wheeled land vehicle, and a vehicle-mounted measurement target (1) equipped with a prism mirror for information-based construction as the measurement target (2) is used to perform pre-measurements when paving roads or the like, but as mentioned above, the present invention is not limited to such a usage mode.

[0033] First, a measurement equipment installation tool such as a tripod is set up in a predetermined location, and the total station (A) is attached to the measurement equipment installation tool. Next, the user assembles the weight (6) and the measurement target (2) by screwing them into the balancing device (5).

[0034] As shown in FIG. 2, the user (B) drives the vehicle-mounted measurement target (1) by the handle (7) to the location where the preliminary measurement will be performed. Even if the location where the vehicle-mounted measurement target (1) is traveling is inclined or uneven, as shown in FIGS. 3 and 4, the weight of the weight (6) rotates the balancing device (5) around the axle (4) to position the weight side vertically downward and the measurement target side vertically upward, thereby maintaining the measurement target (2) in a vertical position. This allows the vehicle-mounted measurement target (1) to fully receive the measurement light irradiated from the measurement instrument (A) and fully reflect it back to the measurement instrument (A). Furthermore, because the measurement target (2) can be maintained in a vertical position, the distance between the measurement target (2) and the traveling surface on which the vehicle-mounted measurement target (1) is traveling can be maintained constant.

[0035] Furthermore, with the vehicle-mounted measurement target (1), if the measurement target (2) begins to tilt, the measurement target (2) can be immediately returned to a vertical position like a toy doll, so the measurement target (2) does not swing significantly due to inertia, especially when the vehicle-mounted measurement target (1) is started or stopped.

[0036] Furthermore, if it is necessary to change the type of weight (6) or the model of the measurement target (2), or if it is necessary to replace the weight (6) or the measurement target (2) due to a malfunction, the user (B) can unscrew the weight (6) and / or the measurement target (2) from the balancing device (5) to remove them, and then screw in and install a different weight (6) and / or measurement target (2).

[0037] The three-dimensional coordinates of the prism mirror are then calculated by a computer to measure its position.The user (7) also unscrews the weight (6) and the measurement target (2) from the balancing device (5) and disassembles them for storage.

[0038] According to the measurement method using the above-mentioned vehicle-mounted measurement target (1), it is possible to perform measurements with higher accuracy than the previous measurement using a pushcart simply equipped with a prism mirror. [Explanation of symbols]

[0039] 1. Vehicle-mounted measurement target 2. Measurement target (prism mirror) 3 wheels 4 axles 5. Balancing device 6 Pyramid 7 Handle A. Measuring equipment (total station) B user

Claims

1. A vehicle-mounted measurement target is mounted on a wheeled land vehicle and has a measurement target for reflecting measurement light emitted from a measurement instrument back to the measurement instrument, the vehicle-mounted measurement target having wheels, axles, a balancing device, a weight, and the measurement target, the wheels are vehicle components for driving the vehicle-mounted measurement target to a location where measurement using the measurement target is to be performed, the axles are shaft members for rotating the wheels and are formed of rod-shaped members, the balancing device is a device for balancing the weight and the measurement target, the axles are inserted inside the balancing device and the device rotates around the axles as an axis, the weight is provided on one side of the axles and the measurement target is provided on the other side, and the weight is a balance weight for rotating the balancing device to position the weight installation side vertically downward and the measurement target installation side vertically upward.

2. 2. The vehicle-mounted measurement target according to claim 1, wherein the weight and / or the measurement target are detachably attached to the balancing device.

3. 3. The vehicle-mounted measurement target according to claim 1, further comprising a handle for a user to hold and operate the vehicle-mounted measurement target.

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