JP2021067113A - Data transmission system - Google Patents

Abstract

To provide a data transmission system capable of properly transmitting measurement data.SOLUTION: Sensors 19-1, 19-2 are provided at a lower end portion of a high pressure injecting and stirring device 1, and measurement data is obtained using the sensors 19-1, 19-2 when the high pressure injecting and stirring device 1 drills or improves a ground 31. The measurement data is changed to visible light signals at a converter 23, and transmitted from a transmitting portion 21 into a flow passage 17-1. And, the visible light signals moving upward in the flow passage 17-1 to be transmitted are received at an aboveground receiving portion 27, are changed to electrical signals at an aboveground transmitting portion 29, and are transmitted to an analysis portion 35.SELECTED DRAWING: Figure 3

Description

The present invention relates to a data transmission system.

When drilling the ground, there is a system that uses a sensor to measure data related to the position and inclination of the drilling device, the improved diameter of the ground, and the like. For example, in Patent Documents 1 and 2, the measurement data is transmitted to the rod by transmitting the vibration of the supermagnetic strain element provided in the excavation head to the rod, or by providing an optical communication means near the connection portion of the rod member to perform infrared communication. Is transmitting to.

Further, in Patent Document 3, when the ground is improved by the high-pressure injection stirring method, the measurement data measured by the sensor provided at the lower end of the high-pressure injection stirring device can be transmitted to a computer on the ground using electromagnetic waves or the like. Are listed.

Japanese Patent No. 2935179 Japanese Patent No. 5948576 Japanese Unexamined Patent Publication No. 2014-181526

However, these methods have a problem in realizing the transmission of measurement data. For example, transmission by vibration has a limit of transmission distance due to attenuation and noise. Further, in the above-mentioned infrared communication, an optical communication means having a complicated structure is required for each rod member, and each rod member needs to be considerably modified. Furthermore, when electromagnetic waves are used, there is a concern that the transmission of measurement data may be hindered by the metal rod.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a data transmission system capable of suitably transmitting measurement data.

The present invention for achieving the above-mentioned object is a data transmission system provided in a construction device having a rod to be inserted into the ground, and a sensor and measurement data measured under the ground surface by the sensor are subjected to visible light. The data transmission system includes a conversion unit that converts a signal or a laser signal, and a communication unit that transmits the visible light signal or the laser signal through the inside of the rod.

In the present invention, the measurement data acquired by the sensor can be transmitted in the rod by visible light communication or laser communication, and can be transmitted quickly. Long-distance transmission is possible by using visible light communication or laser communication, and most of the rods do not require modification. Moreover, the transmission is not hindered by the metal rod. Therefore, the measurement data can be suitably transmitted.

The communication unit has a transmission unit and a reception unit for the visible light signal or a laser signal, and a housing for accommodating the conversion unit and the transmission unit may be provided at an end portion of the construction device below the ground surface. desirable.
By providing the housing, waterproofing of the conversion unit and the transmission unit can be realized, and damage to these can be prevented.

In the present invention, for example, the visible light signal or the laser signal is transmitted through the water flow path in the rod. Alternatively, the visible light signal or the laser signal may be transmitted through the air flow path in the rod. Alternatively, the visible light signal or the laser signal may be transmitted through the flow path of the solidifying material in the rod. Further, a dedicated transmission line for transmitting the visible light signal or the laser signal may be formed in the rod by a tube.
In this way, the visible light signal and the laser signal can be transmitted using the flow path of water, air, and the solidifying material. In this case, a space for transmitting the visible light signal and the laser signal is newly provided in the rod. No need to add. On the other hand, a dedicated transmission line for transmitting a visible light signal or a laser signal may be formed by a tube, and in this case, since there is nothing that interferes with communication, the signal can be preferably transmitted.

It is desirable that the visible light signal or the laser signal reflecting portion is provided on a part or all of the wall surface of the flow path or the transmission line.
By using a part or all of the wall surface as the reflecting portion, even when the rod is bent or warped, the visible light signal or the laser signal can be reflected by the wall surface and transmitted suitably.

It is also desirable to provide a power generation unit that generates power by utilizing the flow of water, air, or a solidifying material in the rod.
By providing the above power generation unit, a battery for supplying electric power to the sensor or the like becomes unnecessary.

The data transmission system of the present invention has, for example, an analysis unit that determines the characteristics of the ground using the measurement data obtained by the sensor at the time of drilling the ground by the construction device.
By transmitting the measurement data to the analysis unit at the time of drilling the ground and determining the characteristics of the ground, the determination result can be fed back to the drilling work of the ground or reflected in the construction of the ground improvement body.

It is also desirable to have an analysis unit that determines the finished shape of the ground improvement body using the measurement data obtained by the sensor when the ground is improved by the construction device.
By transmitting the measurement data to the analysis unit at the time of ground improvement and judging the finished shape of the ground improvement body, the quality and productivity of the ground improvement body can be greatly improved by feeding back the judgment result to the ground improvement work. Can be done.

The communication unit has a transmission unit and a reception unit for the visible light signal or the laser signal, and the visible light signal or the laser signal received by the reception unit is converted into an electric signal and transmitted to the analysis unit on the ground. It is also desirable to have more parts.
As a result, the received visible light signal and laser signal can be transmitted to an analysis unit such as a computer installed on the ground.

According to the present invention, it is possible to provide a data transmission system capable of suitably transmitting measurement data.

The figure which shows the high pressure injection stirring apparatus 1. The figure which shows the high pressure injection stirring apparatus 1. The figure which shows the state at the time of drilling the ground 31 by a high pressure injection agitator 1. The figure which shows the state at the time of improvement of the ground 31 by the high pressure injection agitation device 1. Example of resistivity sensor. The figure which shows the high pressure injection agitator 1'. The figure which shows the high pressure injection agitator 1 ". The figure which shows the reflection part 53. The figure which shows the high pressure injection stirring apparatus 1a. The figure which shows the high pressure injection stirring apparatus 1b. The figure which shows the high pressure injection stirring apparatus 1c.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
(1. High-pressure injection stirring device 1)
1 and 2 are views showing a high-pressure injection stirring device 1 having a data transmission system according to an embodiment of the present invention. 1A and 1B are views showing a cross section along the axial direction of the rod 3 of the high-pressure injection stirring device 1, and FIG. 2 is a cross section orthogonal to the axial direction of the rod 3 of the high-pressure injection stirring device 1. It is a figure which shows. 1 (a) is a cross section taken along line B1-B1 of FIG. 2, FIG. 1 (b) is a cross section taken along line B2-B2 of FIG. It is a cross section by A.

The high-pressure injection stirring device 1 has a rod 3 formed by connecting a plurality of pipe bodies in the axial direction. A waterproof housing 7 and a tip member 9 are provided at the lower end of the high-pressure injection stirring device 1, and a swivel 11 is provided at the upper end.

The housing 7 is provided below the rod 3. The outer peripheral shape of the housing 7 corresponds to the outer peripheral shape of the rod 3, and a partition wall 13 is provided at the boundary between the rod 3 and the housing 7. The tip member 9 is provided below the housing 7.

The swivel 11 is provided above the rod 3. The swivel 11 is for supplying water, air, a solidifying material, and the like to the inside of the rod 3.

The high-pressure injection stirring device 1 of the present embodiment is a construction device capable of drilling holes in the ground in addition to improving the ground. The ground is excavated by ejecting high-pressure drilling water from the tip member 9, and the lower part of the rod 3 is drilled. The ground is improved by ejecting a solidifying material such as cement milk from the outside of the rod 3.

In the present embodiment, the pipe body constituting the rod 3 is a triple pipe, and the lower ends of the outer pipe 3-1 and the central pipe 3-2 are closed by the partition wall 13. The inner pipe 3-3 penetrates the partition wall 13 and bends in the housing 7, and the lower end thereof reaches the outer peripheral surface of the tip member 9.

The pipe 3-1 becomes an air flow path 17-1, and has an ejection port 5-1 for ejecting air from the lower part of the rod 3 toward the outside of the rod 3. The pipe 3-2 serves as a flow path 17-2 for the solidifying material, and has an outlet 5-2 for ejecting the solidifying material from the lower part of the rod 3 toward the outside of the rod 3. The pipe 3-3 serves as a water flow path 17-3, and has a spout 5-3 for ejecting water diagonally downward from the tip member 9.

The data transmission system of the present embodiment transmits the measurement data measured under the ground surface to the ground by visible light communication at the time of drilling a hole in the ground or improving the ground by the high-pressure injection stirring device 1, and the sensor 19 (19) -1, 19-2), a transmission unit 21, a conversion unit 23, a battery 25, a reception unit 27, a terrestrial transmission unit 29, and the like.

The sensor 19-1 is a sensor such as a pore water pressure gauge that measures water pressure, and is provided on the surface of the tip member 9 or the housing 7. The sensor 19-2 is an ultrasonic sensor and is provided on the surface of the housing 7.

The transmission unit 21, the conversion unit 23, and the battery 25 are housed in the housing 7.

The transmission unit 21 is a light source of visible light and transmits a visible light signal. For example, an LED (Light Emitting Diode) is used as the light source, and the wavelength (color) of visible light is not particularly limited. The aperture value (F value) at the time of transmitting the visible light signal is also not particularly limited, but in the present embodiment, when there is appropriate light scattering and the visible light is reflected in the tube, the rod is bent or the like. However, it is preferable because it can communicate. For example, if the F value is in the range of 30 to 75, it can withstand long-distance communication and is resistant to the deviation of the optical axis, so that it can be applied to tubes of various lengths and diameters.

The transmission unit 21 is provided on the lower surface of the partition wall 13 directly below the flow path 17-1. The partition wall 13 has a light transmitting unit 15 that transmits a visible light signal transmitted from the transmitting unit 21. The light transmitting portion 15 is formed of, for example, pressure-resistant glass or the like.

The conversion unit 23 converts the measurement data acquired by the sensors 19-1 and 19-2 into a visible light signal. The conversion unit 23 is installed in the vicinity of the transmission unit 21.

The battery 25 supplies electric power to the sensors 19-1, 19-2, the conversion unit 23, the transmission unit 21, and the like to operate them.

The receiving unit 27 receives the visible light signal transmitted by the transmitting unit 21. The receiving unit 27 is provided at a position corresponding to the flow path 17-1 in the swivel 11 and directly above the transmitting unit 21. The transmitting unit 21 and the receiving unit 27 constitute the communication unit in the present invention.

The terrestrial transmission unit 29 converts the visible light signal received by the reception unit 27 into an electric signal and transmits it to the terrestrial analysis unit 35 (see FIGS. 3 and 4) by a communication means such as radio. The terrestrial transmission unit 29 is installed in the vicinity of the reception unit 27.

(2. Transmission of measurement data)
FIG. 3A is a diagram showing a state at the time of drilling the ground 31 by the high-pressure injection stirring device 1.

To drill a hole in the ground 31, as shown in FIG. 3A, the high-pressure injection stirring device 1 is held by the boring machine 33, and the rod 3 is inserted into the ground 31 while rotating. At the same time, water is supplied to the flow path 17-3 from the hose connected to the swivel 11, and the high-pressure drilling water 37 is ejected from the ejection port 5-3 to cut the ground 31.

The tip of the high-pressure injection stirring device 1 descends while cutting the ground 31 as shown by an arrow C until the tip member 9 reaches a predetermined depth of the ground 31. The transmission unit 21, the conversion unit 23, and the battery 25 are housed in the housing 7 at the lower end portion (the end portion below the ground surface) of the high-pressure injection stirring device 1, so that waterproofness is ensured.

In the present embodiment, when the ground is drilled by the high-pressure injection stirring device 1, the water pressure at the drilled portion is measured by using the sensor 19-1. The measurement data is sent to the conversion unit 23 as shown by the arrow a in FIG. 3B, and is converted into a visible light signal. The transmission unit 21 transmits the visible light signal converted by the conversion unit 23 toward the reception unit 27.

The visible light signal transmitted by the transmitting unit 21 passes through the translucent unit 15 as shown by the arrow b, enters the flow path 17-1 upward, travels upward, and is received by the receiving unit 27 on the ground.

The terrestrial transmission unit 29 converts the visible light signal received by the reception unit 27 into an electric signal and transmits it to the analysis unit 35 on the ground.

The analysis unit 35 is a computer terminal including, for example, a control unit, a storage unit, a display unit, and the like, and determines the characteristics of the ground 31 based on the transmitted measurement data.

For example, if the relationship between the water pressure data of the drilled portion of the ground by the high-pressure injection stirring device 1 accumulated so far and the soil type and N value of the ground is obtained in advance, drilling is performed based on the relationship. The characteristics of the ground 31 can be determined from the measurement data at that time. Generally, when the water pressure is high, the ground 31 is hard, and when the water pressure is low, the ground 31 is soft.

On the other hand, FIG. 4A is a diagram showing a state at the time of improvement of the ground 31 by the high-pressure injection stirring device 1.

To improve the ground 31, as shown in FIG. 4A, the boring machine 33 holds the high-pressure injection agitator 1 and pulls up the rod 3 inserted in the ground 31 while rotating it. At the same time, air and a solidifying material are supplied from the hose connected to the swivel 11 to the flow paths 17-1 and 17-2, respectively, and ejected from the spouts 5-1 and 5-2 (see FIG. 1A), respectively. As a result, the ground 31 on the outside of the rod 3 is cut by the jet 39 composed of the solidifying material and air, and the solidifying material and the cut earth and sand of the ground 31 are mixed and agitated to form a columnar ground improvement body 41. ..

The tip of the high-pressure injection stirring device 1 rises in the ground 31 as shown by arrow D until the ground improvement body 41 is formed in a predetermined depth range of the ground 31.

In the present embodiment, when the ground is improved by the high-pressure injection stirring device 1, ultrasonic measurement is performed using the sensor 19-2. In ultrasonic measurement, sensor 19-2 oscillates ultrasonic waves toward the outside of the rod 3. The oscillated ultrasonic waves propagate in the ground improvement body 41 before solidification and are reflected by the ground on the peripheral surface 42 thereof. The sensor 19-2 receives this reflected wave and measures the time difference between the oscillation and the reception of the ultrasonic wave.

The measurement data by the sensor 19-2 is sent to the conversion unit 23 as shown by the arrow c in FIG. 4B, and is converted into a visible light signal. The transmission unit 21 transmits the visible light signal converted by the conversion unit 23 toward the reception unit 27.

The visible light signal transmitted by the transmission unit 21 passes through the light transmission unit 15 and enters the flow path 17-1 upward as shown by the arrow b, and proceeds upward to the reception unit 27 on the ground. Received. The terrestrial transmission unit 29 converts the visible light signal received by the reception unit 27 into an electric signal and transmits it to the analysis unit 35 on the ground.

The analysis unit 35 determines the finished shape of the ground improvement body 41 based on the transmitted measurement data. For example, the distance from the rod 3 to the peripheral surface 42 is calculated based on the time difference between the oscillation and the reception of ultrasonic waves, and it is determined whether the size and shape of the ground improvement body 41 are desired.

As described above, in the present embodiment, the measurement data acquired by the sensors 19-1 and 19-2 can be transmitted in the rod 3 by visible light communication and quickly sent to the ground. By using visible light communication, long-distance transmission becomes possible, and most of the rods 3 do not require modification. Further, the transmission is not hindered by the metal rod 3. Therefore, the measurement data can be suitably transmitted.

In the present embodiment, the characteristics of the ground 31 can be quickly determined in real time from the measurement data measured by the sensor 19-1 at the time of drilling the ground 31, and this can be fed back to the drilling work of the ground 31 or the ground improvement body 41. It can be reflected in the construction. Further, during the ground improvement, the quality can be confirmed by quickly determining the finished shape of the ground improvement body 41 in real time based on the measurement data measured by the sensor 19-2, and feeds back to the control of the high-pressure injection stirring device 1. Since this is possible, the quality and productivity of the ground improvement body 41 can be significantly improved, leading to labor saving in construction work and reduction in construction period and cost.

Further, in the present embodiment, by accommodating the conversion unit 23, the transmission unit 21, and the like in the housing 7, waterproofing thereof can be realized and damage thereof can be prevented.

Further, the visible light signal can be transmitted using the air flow path 17-1 in the rod 3, and it is not necessary to newly add a space for transmitting the visible light signal in the rod 3. Therefore, the measurement data can be transmitted without making the diameter of the rod 3 larger than that of the existing rod.

Further, in the present embodiment, the visible light signal received by the receiving unit 27 can be converted into an electric signal by the terrestrial transmission unit 29 and transmitted to the analysis unit 35 of a computer or the like installed on the ground.

However, the present invention is not limited to this. For example, in the present embodiment, the water pressure at the drilled portion is measured at the time of drilling the ground 31 to determine the characteristics of the ground 31, but the data measured at the time of drilling the ground 31 is not limited to this.

As an example, the acceleration of the lower end of the high-pressure injection agitator 1, the load applied to the lower end, the moment applied to the lower end, the frictional force of the peripheral surface of the lower end, the injection pressure of the drilled water 37, etc. It may be measured by a sensor provided at the lower end. For example, a 3-axis accelerometer can be used as the sensor 19 for measuring the acceleration, and a 6-axis sensor can be used as the sensor 19 for measuring the moment. A load cell can be used as the sensor 19 for measuring the load, and a friction meter can be used as the sensor 19 for measuring the frictional force. These sensors 19 may be arranged, for example, inside or on the surface of the housing 7 or the tip member 9, and may be used for determination by combining measurement data from a plurality of sensors 19.

Further, the data measured at the time of drilling the ground 31 is not limited to the data used for determining the characteristics of the ground 31, but may be used for measuring the position and posture of the high-pressure injection stirring device 1. For example, a gyro sensor or a geomagnetic sensor is provided on the tip member 9 as the sensor 19, and these measurement data are transmitted to the ground by visible light communication at the time of drilling the ground 31. By combining these measurement data with the data such as the plane position of the high-pressure injection stirring device 1 measured by the GPS sensor on the ground and the length of the ground insertion portion of the rod 3 measured on the ground, the three-dimensional coordinates of the tip member 9 are combined. The position and the degree of bending of the rod 3 can be calculated and grasped in real time.

Further, in the present embodiment, the finished shape of the ground improvement body 41 is determined from the measurement data of the ultrasonic sensor at the time of ground improvement, but the data measured at the time of ground improvement is not limited to this. For example, the injection pressure of the solidifying material may be measured by a sensor 19 arranged in the vicinity of the ejection port 5-2, or a sensor 19 for measuring the pressure at the ground improvement location may be provided on the surface of the housing 7, or the ground improvement location and its portion may be provided. It is also possible to measure the difference in specific resistance (ease of flow of electricity) with the surrounding ground with sensors 19, and use the measurement data of these sensors 19 to determine the finished shape of the ground improvement body 41. is there. Similar to the above, the measurement data from the plurality of sensors 19 may be combined and used for the determination.

FIG. 5 shows an example in which a specific resistance sensor having a ring-shaped set of current electrodes 191 and a ring-shaped set of potential electrodes 192 is used as the sensor 19, and the set of current electrodes 191 is the ejection port 5-1. A set of potential electrodes 192 are arranged on the peripheral surface of the housing 7 under 5-2 with an upper and lower spacing, and a set of potential electrodes 192 are arranged on the peripheral surface of the housing 7 with a vertical spacing between the set of current electrodes 191. Be placed. A total of four electrodes, including the current electrode 191 and the potential electrode 192, are arranged at equal intervals a, and the interval a is, for example, a value about the radius of the ground improvement body 41 to be constructed.

The resistivity sensor operates by receiving power supplied from the battery 25, and a current flows from one of the current electrodes 191 toward the outside of the housing 7. The current flows through the ground improvement body 41 or the ground 31 before solidification as shown by arrow I, and reaches the other current electrode 191. The resistivity sensor calculates the value of the resistivity in the range where the distance from the housing 7 is a or less as measurement data based on the potential difference between the potential electrodes 192 when a current is passed. The measurement data (resistivity) is transmitted to the analysis unit 35 on the ground by visible light communication or the like, and is used for determining the finished shape of the ground improvement body 41. Since the specific resistance differs between the ground improvement body 41 before solidification and the ground 31 (generally, the ground improvement body 41 before solidification is smaller), the calculated specific resistance is a value peculiar to the ground improvement body 41 before solidification. If is shown, it can be determined that the ground improvement body 41 is formed approximately as planned.

As described above, various measurement data at the time of drilling, measurement data at the time of ground improvement, and the sensor 19 used for the measurement can be considered, and this is the same in each embodiment described later. In addition, the measurement data at the time of drilling and the measurement data at the time of ground improvement are linked with various construction data at the time of drilling and ground improvement, and this is made to correspond to the characteristics of the ground 31 and the finished shape of the ground improvement body 41. And record it. By using AI (artificial intelligence) obtained by performing machine learning from the data recorded in this way, it is possible to completely automate a series of construction work.

Further, in the present embodiment, the visible light signal is transmitted through the air flow path 17-1, but the visible light signal may be transmitted through another flow path. For example, in the high-pressure jet stirring device 1'of FIG. 6, the visible light signal is transmitted through the flow path 17-2 of the solidifying material as shown by the arrow e. In this case, the transmission unit 21 is provided on the lower surface of the partition wall 13 directly below the flow path 17-2, and the light transmission unit 15 is provided at a position corresponding to the transmission unit 21 on the partition wall 13. The receiving unit 27 is provided at a position corresponding to the flow path 17-2 in the swivel 11. By using blue light having a short wavelength as the visible light signal, it is possible to suitably transmit the visible light signal even in a turbid solidifying material.

In the high-pressure jet stirring device 1 ”of FIG. 7A, the visible light signal is transmitted through the water flow path 17-3 as shown by the arrow f. In this case, the transmitting unit 21 is the bent portion of the pipe 3-3. As shown in FIG. 7B, a U-shaped bent portion may be provided in the pipe 3-3 in the housing 7, and a transmitting portion 21 may be provided below the bent portion. Also in the case of, the light transmitting unit 15 is provided at the position corresponding to the transmitting unit 21 in the tube 3-3, and the receiving unit 27 is provided at the position corresponding to the flow path 17-3 in the swivel 11.

Further, as shown in FIG. 8, the wall surface of the flow path 17-1 may be coated to provide a reflecting portion 53 having a higher reflectance than the wall surface. As a result, even when the rod 3 is bent or warped in the process of drilling holes in the ground or improving the ground, the visible light signal can be reflected by the reflecting portion 53 on the wall surface and transmitted as shown by the dotted line. In this example, the reflecting portion 53 is formed on the wall surface of the flow path 17-1 used for transmitting the visible light signal, that is, the inner peripheral surface of the tube 3-1 and the outer peripheral surface of the tube 3-2. In the present embodiment, a part of the wall surface may be used as the reflecting portion 53, or the entire wall surface may be used as the reflecting portion 53. That is, the forming range of the reflecting portion 53 may be the entire wall surface of the flow path 17-1, or may be only the portion where the rod 3 is bent or warped if it is known.

Further, the target for installing the data transmission system of the present embodiment is not limited to the high-pressure injection stirring device 1 described above, but may be a construction device having a rod 3 to be inserted into the ground 31. For example, it may be a high-pressure injection agitator that does not have a drilling function. A drilling device such as a boring rod used for construction of various piles such as the BCH method and the TBH method may be used. Further, the configuration of the rod 3 is not particularly limited as long as it can internally communicate with a visible light signal.

For example, in the case of an auger used when constructing a continuous underground wall by the SMW method, the measurement data of a sensor such as an inclinometer installed at the tip of the auger (rod) is transmitted in the space inside the auger and monitored in real time on the ground. By doing so, the drilling accuracy can be improved.

In addition, a free boring type ground improvement method (for example, special method) such as the Carbex (registered trademark) method, in which a drilling rod capable of curved drilling is used to drill a hole in the ground and a chemical solution is injected through the hole to improve the ground. It can also be applied to (Open 2013-023888, etc.). In this case, the position information of the tip of the drilling rod measured by a sensor such as a gyro sensor is transmitted to the ground using visible light communication, and the drilling rod is grounded. It is possible to drill holes with a drilling rod while confirming the position of.

In addition, when boring for fore-piling during tunnel excavation, a sensor by a camera is provided at the tip of the boring rod, and image data taken inside the perforation by the camera is transmitted to the terminal in the tunnel using visible light communication. It is also possible to check if there are any cracks.

Further, in the present embodiment, data transmission using a visible light signal is performed, but a laser signal may be used instead of the visible light signal, and the same effect as described above can be obtained. In this case, the conversion unit 23 converts the measurement data acquired by the sensors 19-1 and 19-2 into a laser signal, and the terrestrial transmission unit 29 converts the laser signal received by the reception unit 27 into an electric signal. It is transmitted to the analysis unit 35.

Hereinafter, another example of the present invention will be described as the second to fourth embodiments. The differences between the embodiments and the embodiments described so far will be described, and the same configurations will be omitted by adding the same reference numerals in the drawings and the like. In addition, the configurations described in each embodiment, including the first embodiment, can be combined as needed.

[Second Embodiment]
FIG. 9 is a diagram showing the high-pressure injection stirring device 1a according to the second embodiment in the same manner as in FIG. 1 (b). The high-pressure injection stirring device 1a shown in FIG. 9 differs from the first embodiment in that it includes a power generation unit 50 having an impeller 49 and a generator 51 instead of the battery 25.

The impeller 49 is provided inside the water flow path 17-3. The impeller 49 and the generator 51 are arranged in the housing 7. In the high-pressure injection stirring device 1a, when water is supplied into the flow path 17-3, the impeller 49 rotates due to the water flow. The generator 51 obtains electric power from the rotation of the impeller 49, stores electric power, and supplies electric power to the sensors 19-1, 19-2, the conversion unit 23, the transmission unit 21, and the like to operate them.

In the second embodiment, the same effect as that of the first embodiment can be obtained by performing visible light communication of the measurement data, and the battery 25 becomes unnecessary by performing power generation using the flow of water. ..

In the second embodiment, power is generated by a water stream, but the power generation method is not limited to this. The impeller 49 installed in the air flow path 17-1 or the solidifying material flow path 17-2 may be rotated by the flow of air or the solidifying material to generate electricity. It is also possible to generate electricity using the light of visible light communication.

[Third Embodiment]
FIG. 10 is a diagram showing the high-pressure injection stirring device 1b according to the third embodiment in the same manner as in FIG. 1 (b). The high-pressure jet stirring device 1b is different from the first embodiment in that a visible light signal transmitting unit 43 and a receiving unit 47 are added.

The transmission unit 43 is provided at a position corresponding to the flow path 17-1 in the swivel 11. The receiving unit 47 is provided on the lower surface of the partition wall 13 at a position corresponding to the flow path 17-1 and directly below the transmitting unit 43. A translucent portion 45 for transmitting a visible light signal is provided at a position corresponding to the receiving portion 47 on the partition wall 13.

In the high-pressure injection stirring device 1b, the control command from the analysis unit 35 on the ground is converted into a visible light signal by a conversion unit (not shown), and this visible light signal is transmitted from the transmission unit 43. The visible light signal travels downward through the flow path 17-1 as shown by the arrow g, passes through the translucent unit 45, and is received by the receiving unit 47. The received visible light signal is converted into a control command by a conversion unit (not shown) and transmitted to sensors 19-1 and 19-2 to control measurement specifications such as sampling time. Similar to the above, it is also possible to use a laser signal instead of the visible light signal.

In the third embodiment, in addition to the same effect as in the first embodiment, the measurement specifications of the sensors 19-1 and 19-2 are transmitted by transmitting the control command from the analysis unit 35 on the ground through the rod 3. Etc. can be appropriately controlled. In addition, by transmitting a control command through the rod 3, it is also possible to perform construction control such as drilling control by the rod and control of the chemical solution injection direction. Further, in the case of the universal boring type ground improvement method described above, it is possible to change the drilling position by controlling the angle of the tip of the drilling rod based on the control command.

[Fourth Embodiment]
FIG. 11 is a diagram showing the high-pressure injection stirring device 1c according to the fourth embodiment in the same manner as in FIG. 1 (b). This high-pressure injection stirring device 1c is mainly different from the first embodiment in that a dedicated transmission line is provided for transmitting and receiving visible light signals. In this embodiment as well as in the third embodiment, bidirectional communication is possible by adding a visible light signal transmitting unit 43 and a receiving unit 47.

Further, the high-pressure jet stirring device 1c does not have a drilling function, the tip member 9 is omitted, and the flow of the rod 3'is replaced with the flow path 17-3 (tube 3-3) of the drilled water. A tube 3-4 is provided in the central portion of the path 17-2, and a hollow transmission path 17-4 for transmitting and receiving a visible light signal is formed inside the tube 3-4.

The visible light signal transmitting unit 21 and the receiving unit 47 are provided on the lower surface of the partition wall 13 directly below the transmission line 17-4. The light transmitting units 15 and 45 are provided at positions corresponding to the transmitting unit 21 and the receiving unit 47 on the partition wall 13.

On the other hand, the visible light signal receiving unit 27 and the transmitting unit 43 paired with the transmitting unit 21 and the receiving unit 47 are located in the cap 30 provided at the upper end of the swivel 11 and correspond to the transmission lines 17-4. It is provided in. The visible light signal receiving unit 27 and the transmitting unit 43 are provided at positions directly above the transmitting unit 21 and the receiving unit 47, respectively.

In the present embodiment, since the dedicated transmission line for transmitting the visible light signal is provided by the tube 3-4, there is no obstacle to communication, and the signal can be suitably transmitted. Further, since the pipe 3-4 is located at the center of the cross section of the rod 3', the position does not change due to the rotation of the rod 3', and the difficulty of communication is low.

In the present embodiment, bidirectional communication is enabled by setting the pair of the transmitting unit 21 and the receiving unit 27 for transmitting and receiving measurement data and the pair of the transmitting unit 43 and the receiving unit 47 for transmitting and receiving control commands at different plane positions. However, a transmission / reception unit in which the functions of the transmission unit 21 and the reception unit 47 are integrated, and a transmission / reception unit in which the functions of the transmission unit 43 and the reception unit 27 are integrated are provided above and below the transmission line 17-4, and measurement data is measured. The timing of transmitting and receiving the control command may be different from the timing of transmitting and receiving the control command. Bidirectional communication is also possible by performing communication at different timings in this way.

In addition, the tube 3-4 of the present embodiment can also be provided with the above-mentioned reflecting portion by making the inner surface mirror-finished. Further, since water, a solidifying material, or the like does not flow inside the pipe 3-4, a reflecting portion can be easily provided by inserting a cylinder such as a paper cylinder having specular reflection into the inside.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to such examples. It is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the technical idea disclosed in the present application, and these also naturally belong to the technical scope of the present invention. Understood.

1, 1', 1 ", 1a, 1b, 1c: High-pressure jet agitator 3, 3': Rod 3-1, 3-2, 3-3, 3-4: Tube 5-1, 5-2, 5 -3: Spout 7: Housing 9: Tip member 11: Swivel 13: Partition 15, 45: Transmissive part 17-1, 17-2, 17-3: Flow path 17-4: Transmission path 19, 19-1 , 19-2: Sensor 21, 43: Transmission unit 23: Conversion unit 25: Battery 27, 47: Reception unit 29: Ground transmission unit 30: Cap 31: Ground 33: Boring machine 35: Analysis unit 37: Drilling water 39 : Jet 41: Ground improvement body 42: Peripheral surface 49: Impeller 50: Power generation unit 51: Generator 53: Reflection unit 191; Current electrode 192; Potential electrode

Claims (11)

A data transmission system installed in a construction device having a rod to be inserted into the ground.
With the sensor
A conversion unit that converts the measurement data measured under the ground surface by the sensor into a visible light signal or a laser signal, and
A communication unit that transmits the visible light signal or the laser signal through the inside of the rod,
A data transmission system characterized by comprising. The communication unit has a transmission unit and a reception unit for the visible light signal or a laser signal.
The data transmission system according to claim 1, wherein a housing for accommodating the conversion unit and the transmission unit is provided at an end portion of the construction device below the ground surface. The data transmission system according to claim 1 or 2, wherein the visible light signal or the laser signal is transmitted through the flow path of water in the rod. The data transmission system according to claim 1 or 2, wherein the visible light signal or the laser signal is transmitted through the air flow path in the rod. The data transmission system according to claim 1 or 2, wherein the visible light signal or the laser signal is transmitted through the flow path of the solidifying material in the rod. The data transmission system according to claim 1 or 2, wherein a dedicated transmission path for transmitting the visible light signal or a laser signal is formed in the rod by a tube. The data transmission according to any one of claims 3 to 6, wherein the visible light signal or the laser signal reflecting portion is provided on a part or all of the wall surface of the flow path or the transmission line. system. The data transmission system according to any one of claims 3 to 7, further comprising a power generation unit that generates power by utilizing the flow of water, air, or a solidifying material in the rod. The method according to any one of claims 1 to 8, further comprising an analysis unit for determining the characteristics of the ground using the measurement data obtained by the sensor when the ground is drilled by the construction device. Data transmission system. The method according to any one of claims 1 to 9, further comprising an analysis unit for determining the finished shape of the ground improvement body using the measurement data obtained by the sensor when the ground is improved by the construction device. The data transmission system described. The communication unit has a transmission unit and a reception unit for the visible light signal or a laser signal.
The invention according to any one of claims 1 to 10, further comprising a terrestrial transmission unit that converts the visible light signal or the laser signal received by the reception unit into an electric signal and transmits the electric signal to the analysis unit on the ground. The data transmission system described.

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