JPH03260292A - Data transmission device of underground excavator and transmission method thereof - Google Patents

Abstract

PURPOSE:To make it possible to simplify construction by transmitting a detection signal for the conditions of a front bedrock through waveguides rotating with each other 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 dis played on an indicator 70. A transmission device 80 provided with waveguides rotating with each other is placed between the rotating cutter head 10 and no-rotating shield body 20 of the mechanism, and the detection signal is transmit ted through the transmission device. According to the constitution, high fre quency can be transmitted, and transmission efficiency can be promoted.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Application on Cap 1) The present invention relates to a data transmission device for an underground excavator and a transmission method thereof, and particularly to civil engineering work 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 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 such as an excavator.
Electromagnetic waves (generally frequencies between 100MHz and IGHz)
It is known to explore by transmitting waves underground and receiving reflected waves from obstacles. For this purpose, a transmitting antenna and a receiving antenna are attached to the rotating canterhead.
The detected signal is sent to the non-rotating rear shield body via a slip ring, calculated by a computer, and the result displayed on a display device to detect the presence or absence of an obstacle.

(tlB 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 it is not possible to pass l & frequency signals of several 100 MHz. Therefore, the frequency is converted to a lower frequency for transmission, but this has the drawbacks of poor efficiency and high cost.

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

(Means for Solving One Problem) 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 In an underground excavator, a waveguide is installed between the rotating cutter head and the non-rotating shield body.

In the second invention, in an underground excavator that detects the condition of the ground in front of a rotating canterhead by disposing an exploration device on the outer periphery of the front surface, a signal is transmitted from the exploration device to the rear shield body through a waveguide. It is transmitting.

(Function) According to the above configuration, since high frequency is transmitted from the receiver using a flexible waveguide and a rotating waveguide, impedance matching is good (and insulation from the outside can be achieved). It is efficient.

Moreover, the structure becomes simple and inexpensive.

(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, FIG. 2 is a block diagram of the data transmission device for an underground excavator, and FIG. 3 is a diagram of a waveguide. FIG. 4 is a sectional view showing one example, and FIG. 4 is a perspective view showing another example of the waveguide. Figure 1, Figure 25! ! In I, the underground excavator 1 excavates earth and sand, rock, etc. by rotationally driving the cutter head 10 with the motor 11.

A shield body 20 that moves forward without rotating is provided on the back of the cutter blade 10. In Kantaherado 10,
An exploration device 30 is provided to monitor the collapse of the ground in front of the cutter head 10. The exploration device 30 is composed of a transmitting device 40 and a receiving device 50, and is attached to the cutter head IO as described above, and the shield main body 20 has a ma
A w device 60 and a display device 70 are provided. A transmission device 80 is used for transmission between the receiving device 50 and the control device 60.
is used. The transmission device W80 has a waveguide 81 (the fixed connection waveguide is 81a, and the mutually rotating waveguide between the cutter head 10 and the shield body 20 is 81).
b. ) and mode conversion 582.

This transmitting device 40 includes a trigger generator 41 that outputs a trigger signal for giving timing for emitting radio waves, and a pulse generator 4 that generates a pulse signal according to the trigger signal.
The echo wave reflected from the underground object (not shown) is received by the receiving device 50. The receiving device 50 includes a receiving antenna 51 for receiving signals and a receiver 52 for receiving received echo waves. The high frequency from the receiver 552 is mode converted S via the waveguide 81.
82 into an electrical signal, and the A/D converter 53
is converted into a digital signal by

The signal converted into a digital signal is operated by a control device 60 such as a microcomputer, and is displayed on a display device 70 such as a TV monitor.
will be displayed.

3rd v! J shows an example of a waveguide 81b, which includes a rotating part 83 attached to the cutter head 10 and a shield body 20.
The fixed part 84 is attached to the rotary part 83 and partially inserted into the rotating part 83, and faces the fixed part 84 with a small gap. Figure 4 shows another example, which is transformed from a square to a circle (8
5a) and is electrically connected to the mode converter 82 via a circularly polarized wave generator 85b incorporating a dielectric (not shown) and a circular waveguide rotary stage changer 85c.

Next, the operation will be explained. The trigger signal generated by the trigger generator 41 generates a pulse! 42 into a pulse signal, and the transmitting antenna 43 emits electromagnetic waves. This electromagnetic wave is reflected by underground objects, cavities, etc., and is received by the receiving antenna 51. The received echo waves are transmitted through the receiver 42 to a waveguide 81a fixedly connected to the hend force printer 10 while keeping the high frequency.
The signal enters the mode converter 82 via the mutually rotating waveguide 81b between the cutter head 10 and the shield body 20, and is converted into an electrical signal. 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 described above, according to the present invention, since high frequency transmission is performed using a waveguide, impedance matching can be achieved well, and the structure is simple and inexpensive. Further, since the frequency remains high, an excellent effect of improved performance 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, FIG. 2 is a block diagram of a data transmission device for an underground excavator according to the present invention, and FIG. 3 is a block diagram of the data transmission device for an underground excavator according to the present invention. FIG. 4 is a cross-sectional view showing an example of a waveguide used in the present invention, and FIG. 4 is a perspective view showing another example of the waveguide used in the present invention. 1...Underground excavator 10...Canter head 20...Shield body 30...Exploration device 40...Receiving device 50...Transmitting device 60... Control device 70... Display device 81... Waveguide

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.The rotating cutter head and the shield body do not rotate. A data transmission device for an underground excavator, characterized in that a waveguide is provided between the two. (2) In an underground excavator, an exploration device is installed on the front outer periphery of the rotating cutter head to detect the condition of the ground in front, and a signal is transmitted from the exploration device to the rear shield body through a waveguide. Data transmission method for underground excavators.