JP3147551B2 - Diagnostic equipment for concrete slabs - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for diagnosing a concrete floor slab used in a vehicle traveling portion such as a bridge.

[0002]

2. Description of the Related Art Concrete slabs used for running parts of vehicles such as bridges need to be replaced when they have deteriorated due to use. The time of replacement of concrete slabs has conventionally been investigated as follows. I was

[0003] That is, a scaffold is set up at the lower part of a bridge, an operator climbs the scaffold, investigates the state of cracks in the concrete slab from below, and is determined in advance according to the density of the investigated cracks and laws and regulations. By comparing it with the crack diagram, it was determined whether or not it was necessary to make a change.

[0004] The above survey is performed on the entire bridge while the scaffold is relocated.

[0005]

However, the conventional concrete floor slab diagnostic apparatus has the following problems.

[0006] That is, in order to investigate the time of replacement of the concrete slab, it was necessary to construct a scaffold or to move the scaffold, so that it took a long time and cost to carry out the study.

The present invention has been made in consideration of the above circumstances, and has as its object to provide a diagnostic apparatus for a concrete slab capable of checking whether or not it is necessary to replace the concrete slab in a short time. is there.

[0008]

SUMMARY OF THE INVENTION The present invention provides a traveling vehicle,
A transmitting device that sends an elastic wave signal wave by hitting the concrete slab with a hammer, a receiving device that receives a signal wave transmitted inside the concrete slab, and data that inputs deterioration / defect data that has been checked in advance A setting device, a distance meter that inputs a mileage signal from the mileage of the trolley,
Judgment of the presence or absence of deterioration of the concrete slab by the waveform of the signal received from the receiving device, and judgment of the degree of deterioration of the concrete slab by comparing the waveform of the received signal from the receiving device with the deterioration / defect data from the data setting device. The present invention relates to a concrete floor slab diagnostic apparatus, comprising: a control device for performing the determination; a recording device for recording the result of the determination; and a marking device for marking a deteriorated portion of the concrete floor slab.

[0009]

The operation of the present invention is as follows.

While the traveling vehicle is running at a low speed, the concrete floor slab is hit by the hammer of the transmitting device to generate an elastic wave signal wave, the signal wave is received by the receiving device, and the concrete floor slab is converted from the signal wave by the control device. Of the concrete slab can be determined by comparing the signal wave with the deterioration / defect data from the data setting device.

Further, since the result of the judgment is recorded and marked by the recording device, it is possible to check in a short time whether the concrete floor slab needs to be replaced.

Further, while running the traveling vehicle at a low speed,
Since the degree of deterioration of the concrete slab can be diagnosed, the impact on traffic is small.Moreover, even when re-investigating with scaffolding, it is sufficient to investigate only the marked part, so it is sufficient to cover the entire bridge. On the other hand, there can be provided various excellent effects such as an advantage that time and cost are significantly reduced as compared with a case where an operator surveys with a scaffold.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 5 show an embodiment of the present invention.

A transmitting device 4 for transmitting a signal wave 3 such as an elastic wave or an ultrasonic wave toward the concrete slab 2 is provided at a front portion of the traveling vehicle 1.

As shown in FIG. 2, a transmitting device 4 for transmitting an elastic wave has a piston 6 slidably disposed inside a cylindrical container-like hammer case 5 extending in the vertical direction. A pushing spring 7 and a return spring 8 are interposed between the inside and the upper and lower surfaces of the piston 6, and a hammer 9 projecting downward from the hammer case 5 is integrally provided on the lower surface of the piston 6, and a hammer case is provided on the upper surface of the piston 6. 5
Hammer drive provided with a disk 14 provided integrally with an operation rod 11 protruding upward from the top and having a hook portion 10 at an upper end and having a projection 13 on a side surface and a drive source (not shown) for rotating the disk 14 The apparatus main body 12 is provided on the upper part of the hammer case 5, and the projection 13 provided on the side surface of the disk 14 is engaged with the hook portion 10 of the operating rod 11. Compress,
When the projection 13 and the hook 10 are disengaged from each other, the operating rod 11 is suddenly repelled and the hammer 9 applies an impact to the concrete slab 2.

A receiving device 15 for receiving a signal wave 3 such as an elastic wave transmitted through the inside of the concrete floor slab 2 and a marking device 16 such as a paint spray are provided at the rear portion of the traveling vehicle 1.

Further, control signals 17 and 18 are sent to the traveling vehicle 1 to the transmitting device 4 and the receiving device 15, and a receiving signal 19 from the receiving device 15 and a pre-checked and input to the data setting device 20 are input to the data setting device 20. Degradation / degradation indicating the waveform of the signal wave that has passed through the concrete floor slab 2 having the deterioration or defect 21
The defect data 22 and the traveling distance signal 24 from the distance meter 23 of the traveling vehicle 1 are input, and based on the waveform of the receiving signal 19 from the receiving device 15, whether the concrete floor slab 2 has any deterioration or defect 21 And the waveform of the received signal 19 from the receiving device 15 and the data setting device 20
To determine the degree of the deterioration or the defect 21 of the concrete slab 2 by comparing the deterioration / defect data 22 from the data, and to the recording device 25 for recording the received signal 19 from the receiving device 15 and the result of the above judgment. A control device 28 is provided which sends a data signal 26 and sends a marking command signal 27 for marking the concrete slab 2 to the marking device 16 when it is determined that the concrete slab 2 has deteriorated or has a defect 21.

Next, the operation will be described.

In the present invention, the diagnosis is performed by running the traveling vehicle 1 on the upper part of the bridge constituted by the concrete floor slabs 2.

At this time, the traveling speed of the traveling vehicle 1 is 1 hour / hour.
It is about 0 kilometers.

Then, while the traveling vehicle 1 is traveling, the transmitting device 4 provided at the front part of the traveling vehicle 1 is operated by the control signal 17 from the control device 28, and the concrete floor slab 2 is formed as follows. A signal wave 3 such as an elastic wave is transmitted.

That is, the disk 14 is rotated and the projection 13 attached to the disk 14 is circularly moved clockwise in FIG. 2 to periodically lock and lift the hook 10 by the projection 13. Release the locked state.

Then, since the operating rod 11 is pulled up against the pushing spring 7 and then the lifting force is released, the piston 6 is urged downward by the pushing spring 7 and the hammer 9 integrated with the piston 6 is moved. Is lowered, and the hammer 9 hits the concrete slab 2.

Thus, the concrete floor slab 2 is periodically
A signal wave 3 of an elastic wave is generated between the two.

As described above, the generated signal wave 3
Is transmitted through the concrete floor slab 2 as shown in FIG. 1 and received by the receiving device 15 attached to the rear part of the traveling vehicle 1.

The signal wave 3 received by the receiving device 15 is sent to the control device 28 as a received signal 19,
Then, based on the waveform of the received signal 19, it is determined whether or not the concrete slab 2 has any deterioration or defect 21.

When the concrete slab 2 has no cracks or defects 21, the signal wave 3 is transmitted as a naturally attenuated smooth sine wave. As shown in FIG. 4, the signal is normal if the received signal 19 is a smooth sine wave, and abnormal if the waveform is irregular as shown in FIG. 5, as shown in FIG. Will be

When it is determined that the concrete slab 2 has deteriorated or has a defect 21, the control device 28 sends a marking command signal 27 to the marking device 16 to cause the concrete slab 2 to perform marking as a guide. .

Further, when an abnormality is detected from the reception signal 19, the waveform of the reception signal 19 and the data setting unit 20
The degree of the deterioration of the concrete slab 2 and the degree of the defect 21 can also be specifically determined by comparing the deterioration / defect data 22 from the data.

The received signal 19 from the receiving device 15 and the result of the above judgment are sent to the recording device 25 as a data signal 26, and are used for analysis at a later date.

After the diagnosis of the traveling trolley 1 running on the entire bridge has been completed in this way, the concrete floor slab 2 is removed from the marked portion and the portion where the deterioration or defect 21 is determined to be remarkable. To replace

Alternatively, after assembling a scaffold for the above portion and actually examining the degree of deterioration, the concrete floor slab 2 is replaced if necessary.

As described above, while the traveling vehicle 1 is traveling at a low speed, the hammer 9 of the transmitting device 4 hits the concrete floor slab 2 to generate the elastic wave signal wave 3 and the receiving device 1
5, the control device 28 determines whether the concrete slab 2 has deteriorated from the signal wave 3,
Signal wave 3 and deterioration / defect data 2 from data setter 20
2, the degree of deterioration of the concrete floor slab 2 can be determined.

Further, since the result of the judgment is recorded and marked by the recording device 25, it can be checked in a short time whether the concrete slab 2 needs to be replaced.

Further, since the deterioration degree of the concrete floor slab 2 can be diagnosed while the traveling vehicle 1 is traveling at a low speed, the influence on traffic is small. Since it is sufficient to investigate only the marked portion, there is an advantage that the time and cost are greatly reduced as compared with the case where the scaffold is assembled on the entire bridge and the worker investigates.

It should be noted that the present invention is not limited to only the above-described embodiment, and it is needless to say that various changes can be made without departing from the spirit of the present invention.

[0038]

As described above, according to the concrete floor slab diagnostic apparatus of the present invention, the following various excellent effects can be obtained.

I) While running the traveling vehicle at low speed, the concrete floor slab is hit with the hammer of the transmitting device to generate an elastic wave signal wave, the receiving device receives the signal wave, and the control device converts the concrete wave from the signal wave. The deterioration of the concrete slab can be determined by comparing the signal wave with the deterioration / defect data from the data setting device.

II) Since the result of the judgment is recorded and marked by the recording device, it is possible to check in a short time whether the concrete slab needs to be replaced.

III) The degree of deterioration of the concrete slab can be diagnosed while the traveling vehicle is running at a low speed, so that the influence on traffic is small. Since it is sufficient to investigate only the attached portions, there is an advantage that the time and cost are greatly reduced as compared with the case where an operator surveys by constructing a scaffold for the entire bridge.

[Brief description of the drawings]

FIG. 1 is a schematic side view of one embodiment of the present invention.

FIG. 2 is a schematic sectional side view of the transmitting device of FIG. 1;

FIG. 3 is a control system diagram of FIG. 1;

FIG. 4 is a graph showing a normal waveform.

FIG. 5 is a graph showing a waveform when there is a deterioration / defect.

[Explanation of symbols]

 Reference Signs List 1 traveling cart 2 concrete floor slab 3 signal wave 4 transmitting device 9 hammer 15 receiving device 16 marking device 19 receiving signal 20 data setting device 22 deterioration / defect data 25 recording device 28 control device

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-174949 (JP, A) JP-A-62-245958 (JP, A) JP-A-63-238555 (JP, A) 39478 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01N 29/00-29/28

Claims (1)

(57) [Claims] 1. A transmitting device for transmitting a signal wave of an elastic wave to a traveling vehicle by hitting a concrete slab with a hammer;
A receiving device for receiving a signal wave transmitted inside the concrete floor slab, a data setting device for inputting deterioration / defect data checked in advance, and a range finder for inputting a mileage signal from the mileage of the traveling vehicle. Determining the deterioration of the concrete slab by the waveform of the signal received from the receiving device, and determining the degree of deterioration of the concrete slab by comparing the waveform of the signal received from the receiving device with the deterioration / defect data from the data setting device. And a recording device for recording the result of the judgment, and a marking device for marking a deteriorated portion of the concrete slab.