JP2001020271A - Depth detecting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a depth detection system with which high precision depth detection can be performed economically together with smooth penetration work for a hollow pipe. SOLUTION: Depth detection plates 18 are arranged and formed at adequate intervals along the up-down direction on the surface of a hollow tube 14, and a sensor portion 17 is placed at the base portion of a reader erected at the main body of apparatus. A hollow pipe 14 is made of metal, and the depth detection plate 18 is formed with a non-metal material. A sensor portion 17 comprises a detected wave outgoing section 17A sending out the detected wave toward the hollow pipe 14, and a detected wave incoming section 17B where the detected wave reflected at the hollow pipe 14 is received. A sensor portion 17 outputs pulse data to a drive control circuit as a result of the penetration of the hollow pipe 14, outputs it by a monitor to the depth data created by the drive control circuit, and the control data is outputs to a penetration system. In this way, the penetration work of the hollow pipe 14 can be performed smoothly by non-contact, and a depth detection system having a high depth detection accuracy can be obtained economically.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a depth detecting system, and for example, detects a penetration depth of a hollow pipe or the like used as a penetrating body used in a sand pile construction method for ground improvement and the like to perform various controls. For enabling depth detection systems.

[0002]

2. Description of the Related Art Conventionally, as this type of depth detecting device,
There is one disclosed in Japanese Patent Publication No. 51-4569.
As shown in FIG. 6, this depth detecting device is used when a hollow pipe (penetrating body) 1 of a soil improvement sand pile forming device penetrates into the ground G. This depth detecting device mainly includes a wire 2 connected to the top of a hollow tube 1, a depth detecting drum 3, and a potentiometer 4.

The depth detecting drum 3 is provided with, for example, a shaft 3A which is screwed and moves in the axial direction with the rotation of the drum, and a movable contact 4A is provided at an end of the shaft 3A.
The movable contact 4A is connected to the resistance wire 4B of the potentiometer 4
It is set to touch.

[0004] In such a configuration, the wire 2 is controlled to be constantly tensioned. For this reason, as the hollow tube 1 descends, the depth detecting drum 3 rotates, the shaft 3A moves in the axial direction, and the position where the movable contact 4A contacts the resistance wire 4B is displaced. As a result, the depth of the hollow tube 1 can be detected by monitoring a change in the resistance value of the potentiometer 4.

[0005]

However, since the above-described depth detecting device uses the wire 2, there has been a problem that the assembling work and the disassembling work of the ground improvement sand pile forming device become complicated.

In addition, the wire 2 is often cut or expanded and contracted due to deterioration or the like. Each time, the wire 2 needs to be replaced and adjusted, and the maintenance is complicated and the sand pile forming operation is difficult to perform smoothly. Was something.

Further, since it is necessary to always apply a predetermined tension to the wire 2, it is necessary to control the winding drive system of the wire 2.

An object of the present invention is to provide a depth detection system which can smoothly penetrate a penetrator, is economical and has high depth detection accuracy.

[0009]

According to the first aspect of the present invention,
Position detection means of an intruder penetrating from the ground surface into the ground, and arithmetic processing means for performing an arithmetic process based on the detection data of the position detection means to calculate the depth of the intruder underground,
In a depth detection system including a display unit that displays output data from the arithmetic processing unit, the position detection unit includes a recognition target that is formed and formed at appropriate intervals along the vertical direction on the surface of the penetrator, A recognition unit that detects the recognition target unit.

Therefore, according to the first aspect of the present invention, the recognition section detects the recognized section formed on the surface of the penetrator, and outputs detection data to the arithmetic processing means. Calculation of depth data is performed by the calculation output means based on the calculation. Further, the depth data obtained by the calculation output means is output to the display means and can be used as a guide for the penetrating work of the penetrating body.

According to a second aspect of the present invention, there is provided the depth detecting system according to the first aspect, wherein the penetrating body is made of metal, the recognized part is formed of a non-metallic material, and the recognition part is formed of the penetrating part. It is a metal sensor arranged and fixed to the side of the body, and the metal sensor outputs pulse data to the arithmetic processing means as the penetrating body penetrates.

According to the second aspect of the present invention, in addition to the function of the first aspect, the metal sensor of the recognition unit alternates between the metal surface of the penetrator and the non-metal surface of the part to be recognized. Specifically, as the surface material of the penetrator changes at appropriate intervals, for example, the change in the electromagnetic wave or the line of magnetic force emitted from the metal sensor is captured and output to the arithmetic processing means as pulse data. For this reason, it is possible to detect the depth of the penetrator with high accuracy without contact. Further, in the present invention, a non-metallic material, for example, a plate body may be attached to or embedded in the penetrating body, and the recognized portion once formed can be used for a long period of time. Can be reduced.

According to a third aspect of the present invention, there is provided the depth detecting system according to the first aspect, wherein the part to be recognized has a light reflection characteristic different from that of the penetrator, and the recognition part is arranged on a side of the penetrator. A light irradiating unit that irradiates the surface of the penetrator with detection light while being fixed, and includes a light receiving unit that detects the reflected light of the detection light reflected on the surface of the penetrator, and the penetrator The pulse data is output to the arithmetic output means in accordance with the intrusion.

According to the third aspect of the invention having such a structure, in addition to the operation of the first aspect, since the portion to be recognized in the penetrator has a different light reflection characteristic from the material surface of the penetrator, light irradiation is performed. The detection data becomes a pulse voltage or a pulse current by detecting the reflection of the detection light emitted from the section by the light receiving section. In particular, in the present invention, it is sufficient that the recognized part has a different light reflection characteristic from the surface of the penetrator itself, and the detection can be performed without using a material different from the material of the penetrator itself. Specifically, a configuration may be employed in which irregularities having different inclinations of the reflection surface are formed at appropriate intervals on the surface of the penetrator along the longitudinal direction (up-down direction). Note that it is needless to say that they may be formed using materials having different light reflection characteristics.

According to a fourth aspect of the present invention, in the depth detection system according to the second or third aspect, the arithmetic processing means is configured to perform the penetration based on the number of pulses of the pulse data output from the recognition unit. It is characterized in that the body penetration depth is calculated and the depth data is output to the display means.

According to the fourth aspect of the present invention, in addition to the functions of the second and third aspects, the arithmetic processing means measures the number of pulses based on the detected data. By doing so, the position of the penetrator, that is, depth information can be calculated. For this reason, the accuracy of depth detection can be improved by shortening the interval of the recognition target portions formed at appropriate intervals in the vertical direction in the penetrating body.

According to a fifth aspect of the present invention, in the depth detecting system according to the first aspect, the recognized portion is a bar code formed and displayed at appropriate intervals along a vertical direction of the penetrating body. The recognition unit is a barcode reading sensor.

According to the fifth aspect of the present invention, in addition to the operation of the first aspect, it is possible to directly read depth information by reading a bar code displayed on the surface of the penetrator. It becomes possible.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of a depth detecting system according to the present invention will be described below based on embodiments shown in the drawings.

(Embodiment 1) Embodiment 1 is a typical embodiment in which the depth detection system of the present invention is applied to a ground improvement sand pile forming apparatus 10.

Prior to the description of the configuration of the depth detection system of the first embodiment, the configuration of the ground improvement sand pile forming apparatus 10 will be briefly described. FIG. 1 shows a ground improvement sand pile forming apparatus 10. The ground improvement sand pile forming apparatus 10 includes a movable self-propelled apparatus main body 11, a leader 12 erected at a front portion of the apparatus main body 11, and a penetrator suspended from the leader 12 by a wire 13. Hollow pipe (casing pipe) 14
And a vibratory hammer 15 provided above the hollow tube 14. Further, the hollow tube 14 is suspended via a shock absorber 16 provided above. The shock absorber 16 serves to buffer the vibration and impact force of the vibratory hammer 15 and prevents the vibration of the vibratory hammer 15 from being transmitted to the reader 12 side.

In order to form a sand pile using the ground improvement sand pile forming apparatus 10, the apparatus main body 11 is first moved to a position where the hollow pipe 14 penetrates. At this stage, the tip of the hollow tube 14 is closed so that sand (not shown) filled in the hollow tube 14 does not fall. Thereby, when the hollow tube 14 penetrates into the ground G, the hollow tube 14
The inflow of soil and the like can be prevented. Next, the vibratory hammer 15 is operated to make the hollow tube 14 penetrate into the ground to a predetermined depth. Thereafter, the sand in the hollow tube 14 is discharged while pulling out the hollow tube 14 to a predetermined height. Then, the hollow column formed of the sand discharged by re-penetrating the hollow tube 14 is compacted while expanding its diameter. Thereafter, the penetration operation and the extraction operation are repeatedly performed, and the hollow pile 14 is extracted to the surface of the ground, whereby a sand pile can be formed in the ground.

Next, the configuration of the depth detection system according to the first embodiment will be described. The depth detection system according to the first embodiment includes:
As shown in FIG. 3, a sensor unit 17 as a recognition unit and a depth detection plate 18 as a recognized unit are provided. As shown in FIG. 1, the sensor unit 17 is provided at a base of the reader 12 of the apparatus main body 11. As shown in FIGS. 2 and 3, the depth detecting plates 18 are arranged on the surface of the hollow tube 14 at appropriate intervals along the vertical direction. Also, the sensor unit 17
Are connected to a drive control circuit 19 as arithmetic processing means as shown in FIG. The drive control circuit 19 also stores information such as the distance between the depth detecting plates 18 of the hollow tubes 14 of different standards having different lengths and diameters.
0 is connected, and is also connected to a penetrating drive system 21 such as a vibratory hammer 15 and a winding device for the wire 13, and a monitor 22 as a display means installed in the cockpit of the development apparatus main body 11.

Next, the configuration of the sensor section 17 will be described. The sensor unit 17 includes a detection wave emitting unit (light irradiating unit) 17A that emits an ultrasonic wave or light having a property that the reflectance differs depending on a metal and a nonmetal, and a detection wave incident unit (light receiving unit) 17B.
And On the other hand, the hollow tube 14 is formed of a steel tube, and the depth detecting plate 18 formed on the surface of the hollow tube 14 is formed of a synthetic resin. That is, the depth detecting plate 18 is configured by embedding a synthetic resin in the surface of the hollow tube 14 so as to be intermittently exposed at predetermined intervals.

In such a configuration, as the hollow tube 14 gradually penetrates, the detection wave emitting unit 1 of the sensor unit 17
The depth detection plate 18 passes one after another before 7A. As a result, the detection wave incident on the detection wave incident part 17B of the sensor part 17 reflects the steel surface of the hollow tube 14 and reflects the synthetic resin surface of the depth detection plate 18 to enter.
Therefore, the detection data of the sensor unit 17 becomes pulse-like output data, and this output data is output to the drive control circuit 19. The drive control circuit 19 regards the number of the depth detecting plates 18 passing through the sensor unit 17 from the start of the penetration as the number of pulses, and takes into account the standard data of the hollow tube 14 stored in the memory 20 so as to consider the number of pulses. Is calculated. Further, the drive control circuit 19 outputs various control signals to the penetration drive system 21 based on the depth data, and outputs the depth data to the monitor 22.

In the first embodiment, the sensor 1
Since the depth detection can be performed without contact of the hollow tube 14 with the hollow tube 14, complicated maintenance is not required and smooth depth detection can be performed. In addition, assembling of the ground improvement sand pile creation device 10,
There is an advantage that the disassembly does not require installation and removal of the sensor unit 17. Further, since the position of the hollow tube 14 is directly detected, depth detection with a small detection error can be performed.

In the first embodiment, the sensor unit 17 detects the hollow tube 14 in a non-contact manner.
Focusing on the electric conductivity of the material of the depth detecting plate 18 and the hollow tube 14, a metal sensor that captures a change in electric conductivity as pulse data while the sensor unit is in contact with the surface of the hollow tube 14 may be used. It is possible. In this case, the metal sensor may be provided on a steady member for preventing the hollow tube from swinging. Further, as the detection wave emitted from the sensor unit 17, magnetic lines of force can be used in addition to ultrasonic waves and light. Further, in the first embodiment, the depth detection plate 18 is formed of a non-metallic synthetic resin.
The present invention is also applicable to a configuration in which unevenness is formed on the surface of the hollow tube 14 and the unevenness is detected to calculate the depth instead of providing the unevenness.

(Embodiment 2) FIG. 5 is an explanatory diagram showing Embodiment 2 of a depth detection system according to the present invention. In the second embodiment, as shown in the figure, a bar code 23 as a part to be recognized is attached to the surface of the hollow tube 14 along a longitudinal (up and down) direction at a predetermined interval, and the recognition part is formed. Is a bar code reader (bar code reading sensor). Each barcode 23 has position information for the hollow tube 14 added thereto. Note that other configurations in the second embodiment are the same as those in the first embodiment, and a description thereof will be omitted.

In the second embodiment, the position information data detected by the sensor unit 24 is output to the drive control circuit 19 shown in FIG. 4, and the control data is output to the penetrating drive system 21 based on the position information data. Hollow tube 1 for positional information data
4 and output to the monitor 22.

In the second embodiment, since the position information of the hollow tube 14 can be detected from the barcode 23, the drive control circuit 1
9 has an advantage that the arithmetic processing can be simplified.

Although the first and second embodiments have been described above, the present invention is not limited to these, and various changes accompanying the gist of the configuration are possible. For example, in Embodiments 1 and 2 described above, the depth detection system is applied to the ground improvement sand pile creation device 10, but the present invention is applied to various construction machines having a process of penetrating the hollow pipe 14 into the ground. It goes without saying that it can be applied.

The first and second embodiments are examples in which the vibratory hammer 15 is provided above the hollow tube 14 as a penetrating body. However, without using a vibratory hammer, a forced lifting device and a rotary drive device are used. Hollow pipes (casing pipes) that penetrate into the ground while being rotated, for example, stirring shafts that penetrate the solidification pile construction method, and water blocking wall methods called vertical sheet method and sheet wall method Needless to say, each of the above embodiments can be applied to a penetrating frame or the like which is a penetrating body.

[0033]

As is apparent from the above description, according to the first aspect of the invention, there is an effect that the depth can be easily and accurately detected without using a wire. Also,
According to the present invention, maintenance becomes easy,
There is an effect that work required for assembling and disassembling the construction machine for penetrating the penetrating body can be simplified.

According to the second aspect of the present invention, in addition to the effect of the first aspect, the depth of the penetrating body can be detected with high accuracy without contact. Further, according to the present invention, a non-metallic material, for example, a plate body may be attached to or embedded in the penetrating body, and the part to be recognized once formed can be used for a long period of time. Can be greatly reduced.

Further, the third aspect of the present invention is the first aspect of the present invention.
In addition to the effects of the described invention, it is only necessary that the recognized part has a different light reflection characteristic from the surface of the penetrator itself, and the detection can be performed without using a material different from the material of the penetrator itself.
For this reason, according to the present invention, the configuration of the part to be recognized formed on the penetrator can be simplified.

According to the fourth aspect of the present invention, in addition to the effects of the second and third aspects of the present invention, in addition to the recognition target portions formed in the penetrator at appropriate intervals in the vertical direction. By shortening the interval, the accuracy of depth detection can be improved, and the intruder can accurately penetrate into the ground.

Further, the invention according to claim 5 provides the invention according to claim 1.
In addition to the effects of the invention described above, by reading the barcode displayed on the surface of the penetrator, the depth information can be directly read, so that the depth can be directly detected.

[Brief description of the drawings]

FIG. 1 is an explanatory side view schematically showing a first embodiment in which a depth detection system according to the present invention is applied to a ground improvement sand pile creation device.

FIG. 2 is a front view of a main part of the hollow tube according to the first embodiment.

FIG. 3 is a partial sectional view of a main part of a sensor unit and a hollow tube according to the first embodiment.

FIG. 4 is a block diagram schematically illustrating a depth detection system according to the first embodiment.

FIG. 5 is a side view of a main part of a second embodiment in which the depth detection system according to the present invention is applied to a ground improvement sand pile creation device.

FIG. 6 is an explanatory diagram showing a conventional depth detecting device.

[Explanation of symbols]

 14 Hollow tube (penetrating body) 17 Sensor part (recognition part) 17A Detection wave emission part (light irradiation part) 17B Detection wave incidence part (light reception part) 18 Depth detection plate (recognized part) 19 Drive control circuit (calculation processing) Means) 22 Monitor (display means) 23 Barcode (recognized part) 24 Barcode reading sensor (recognition part)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2D040 AA01 AB06 GA01 2D043 CA06 DA05 DB18 DB20

Claims (5)

[Claims] 1. A position detecting means for an intruder penetrating from the ground surface into the ground, and an arithmetic processing means for performing arithmetic processing based on data detected by the position detecting means to calculate the depth of the intruder underground. And a display means for displaying output data from the arithmetic processing means, wherein the position detection means is a recognized part which is formed and arranged at appropriate intervals in the vertical direction on the surface of the penetrator. And a recognition unit for detecting the recognized portion. 2. The depth detection system according to claim 1, wherein the penetrating body is made of metal, and the recognized part is formed of a non-metallic material, and the recognition part is arranged on a side of the penetrating body. A depth detection system comprising a fixed metal sensor, and the metal sensor outputs pulse data to the arithmetic processing unit as the penetrating body penetrates. 3. The depth detection system according to claim 1, wherein the recognized part has a different light reflection characteristic from the penetrating body, and the recognition part is arranged and fixed to a side of the penetrating body.
A light irradiation unit that irradiates the surface of the intruding body with detection light, and a light receiving unit that detects reflected light in which the detection light is reflected on the surface of the intruding body, and the penetrating body penetrates the penetrating body. A depth detection system for outputting pulse data to a calculation output unit. 4. The depth detection system according to claim 2, wherein the arithmetic processing unit determines a penetration depth of the penetrator according to a pulse number of pulse data output from the recognition unit. A depth detection system which calculates and outputs depth data to a display means. 5. The depth detection system according to claim 1, wherein the recognized part is a barcode formed and displayed at appropriate intervals along a vertical direction of the penetrating body, and the recognition part reads a barcode. A depth detection system, which is a sensor.