JPH03260290A - Data transmission device for underground excavation machine and its transmission method - Google Patents

Abstract

PURPOSE:To make it possible to simplify the construction of a rotary center by transmitting a detection signal for the conditions of a front bedrock by means of a laser light in between a rotary section of a cutter head and a fixed section of a shield body. CONSTITUTION:Investigation devices 30 are arranged in the front peripheral surface of a rotating cutter head 10, the conditions of a front bedrock are detected to transmit a detection signal to a rear shield body 20, and it is displayed on an indicator. The detection signal is transmitted by a laser light in between the rotating cutter head 10 and no-rotating shield body 20 of the mechanism.

Description

Detailed Description of the Invention (II) Field of Industrial Application The present invention relates to a data transmission device and a transmission method for an underground excavator, and particularly relates to a data transmission device for an underground excavator and a data transmission method thereof, and particularly for civil engineering applications such as a propulsion device that pushes soil or an excavator that excavates. This invention relates to an improvement of a data transmission device and a transmission method for an obstacle detection device attached to a construction machine.

(Prior Art) Conventionally, an obstacle detection device is attached to the cutter head at the tip of a propulsion machine or a civil engineering machine for excavating an iI cutting front, and it transmits electromagnetic waves (generally a frequency of 100 MHz to IGHz) into the ground. It is known to explore this by transmitting waves to obstacles and receiving reflected waves from obstacles. To do this, a transmitting antenna and a receiving antenna are attached to the rotating cutter head, and the detected signals are sent via a slip ring to the non-rotating shield body at the rear, calculated by a computer, and the results are displayed on a display device. There are methods for detecting the presence or absence of obstacles.

(Plot B to be solved by the invention) However, according to the above-mentioned conventional electrical connection method using a slip ring, high frequency impedance matching cannot be achieved, so high frequency signals of several 100 MHz cannot be passed. , f! Although the transmission is carried out after converting to a 1JIII wave number, there are disadvantages in that the efficiency is poor and the structure of the center of rotation becomes large due to the complicated structure of the slip ring.

The present invention focuses on the above-mentioned advantages and aims to provide a data transmission device for an underground excavator that can transmit data using a laser, and a data transmission method thereof.

(Means for solving gllll) In order to achieve the above object, in the first invention related to the present invention, an exploration device is disposed on the outer periphery of the front surface of the rotating cutter head, and the condition of the ground in front is detected. In an underground excavator, the cutter head or the shield body (but either one has an oscillator for the laser signal used for transmission between the rotating cutter head and the non-rotating shield body). In the second invention, an exploration device is disposed on the outer periphery of the front surface of the rotating cutter head,
In an underground excavator that detects the condition of the ground in front, a laser is used to transmit signals between the rotating part of the cutter head and the fixed part of the shield body.

(Function) According to the above configuration, since a laser is used to transmit signals between the rotating part of the cutter head and the fixed part of the shield body, a small hole is formed in the rotating part of the cutter head or the fixed part of the shield body. In addition, when transmitting a large number of signals, it is sufficient to provide an optical coupler or distributor on either the rotating part of the cutter head or the fixed part of the shield body to combine and distribute the signals. This simplifies the structure.

(Example) Hereinafter, an example of a data transmission device for an underground excavator and a transmission method thereof according to the present invention will be described in detail with reference to the drawings. FIG. 1 is an overall configuration diagram showing one embodiment of a data transmission device for an underground excavator according to the present invention, and FIG. 2 is a block diagram of the data transmission device for an underground excavator. Figure 1,
In FIG. 2, an underground excavator 1 excavates earth, sand, rock, etc. by rotating a cutter head 10 with a motor 11. A shield main body 20 that moves forward without rotating is attached to the back of a car/9 heft 10. is provided. In Kattaherad 10,
An exploration device 30 is disposed for monitoring the collapse of the ground in front of the cutter head 10. The exploration device 30 is composed of a transmitting bag W40 and a receiving device 50, and is attached to the cutter head 10. has been done. Further, a laser oscillator 60 is disposed on the cutter blade 10. Shield body 20
A control device 70 and a display device 80 are disposed. A small hole 91 is passed through the joint 90 between the rotating part of the cutter blade 10 and the fixed part of the shield body 20,
A laser beam passes through this.

The transmitting device 40 includes a trigger generator 4I that outputs a trigger signal to give timing for emitting radio waves, a pulse generator 42 that generates a pulse signal according to the trigger signal, and a transmitting antenna that emits electromagnetic waves according to the generated pulse signal. Echo waves reflected from an underground object (not shown) consisting of 43 and 43 are received by the receiving device 50.

The receiving device 50 includes a receiving antenna 51 that receives signals, and a receiving device that converts received echo waves into voltage! 52. The voltage from the receiver 52 is modulated to modulate the phase of the laser beam 61a from the laser oscillation 160! Sent to 62. The laser beam 61b from the 11162 is sent to the transmission optical system 6.
3, the laser beam 61C passes through a small hole 91 in the joint 90 and enters the receiving optical system 64. Receiving optical system 64
The laser beam 61d that has passed undergoes optical-to-electrical conversion! Enter S65,
converted into an electrical signal. The electrical signal from the optical-to-electrical conversion S65 is converted into a digital signal by the A/D converter 66. The signal converted into a digital signal is calculated by a control device 7o consisting of a microcomputer or the like, and displayed on a display device 80 such as a TV monitor.

Note that in the above embodiment, the phase of the laser beam was modulated, but
It is also possible to modulate the amplitude.Although we passed a single laser beam through a small hole, it is also possible to insert an optical rotor, prism, mirror, etc. in the optical system in either the rotating part of the cutter head or the fixed part of the shield body. A combiner or a distributor may be provided to combine and distribute.

Next, the operation will be explained. The trigger signal generated by the trigger generator 41 is converted into a pulse signal by the pulse generator 42, and electromagnetic waves are emitted from the transmitting antenna 43. This electromagnetic wave is reflected by underground objects or cavities, etc. , are received by the receiving antenna 51.

The received echo wave remains as a high frequency through the receiver 42,
The signal enters the mode conversion 582 via a waveguide 81a fixedly connected to the head cutter 10 and a waveguide 81b rotating mutually between the cutter head 10 and the shield body 20, and is converted into an electrical signal. Ru. The electrical signal is converted into a digital signal by an A/D converter 53, which is operated by a control device 60 consisting of a microcomputer or the like, and the state of the collapse of the ground is displayed on a display device 70 such as a TV monitor.

(Effects of the Invention) As explained above, according to the present invention, even if a laser is used to transmit signals between the rotating part of the cutter head and the fixed part of the shield body, the rotation of the cutter head Either provide a small hole in the cutter head or the fixed part of the shield body, or if multiple signals are to be transmitted, provide an optical coupler or distributor in either the rotating part of the cutter head or the fixed part of the shield body. Since it is only necessary to combine and distribute the materials, the excellent effect of simplifying the structure can be obtained.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram showing one embodiment of a data transmission device for an underground excavator according to the present invention, and FIG. 2 is a block diagram of a data transmission device for an underground excavator according to the present invention. 1...Underground excavator, lO...Cutter head, 20...Shield body, 30...Exploration device, 40...Receiving device, 50...Transmitting device , 60...Laser oscillator, 61a, 61b, 61c, 61d=laser light 62...
・GLL, 3 4 5 6 0 0 1 1 ・Transmission optical system, ・Reception optical system, ・Optical/electrical converter, ・A/D converter, control device, ・Display device, ・Waveguide, ・Small Hole diagram 1

Claims (2)

[Claims] (1) In an underground excavator, an exploration device is installed on the outer periphery of the front surface of the rotating cutter head to detect the condition of the ground in front and display it on the shield body at the rear. 1. A data transmission device for an underground excavator, characterized in that one of them is provided with a laser signal oscillator used for transmission between a rotating cutter head and a non-rotating shield body. (2) In an underground excavator that detects the condition of the ground in front of the rotating cutter head by installing an exploration device on the outer periphery of the front surface, a signal is transmitted between the rotating part of the cutter head and the fixed part of the shield body. A data transmission method for underground excavators that uses lasers to transmit data.