JP2001303611A - Measured-data transmission system of excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measured data transmission system having simple constitution of an excavator. SOLUTION: Measuring instruments 2A, 2B and the like are connected in series through cables 4, and measured data are transmitted successively to a computer 3 from the measuring instrument 2A at a front end through the cables 4. Accordingly, the measuring instrument 2A and the computer 3 need not be connected discretely by the cables, and constitution is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measurement data transmission system for an excavator, and more particularly to a measurement data transmission system for an excavator that drills a ground while adding a cutter block.

[0002]

2. Description of the Related Art In an excavator for piercing a ground, an excavator is appropriately drilled so as to be excavated along a line to be excavated.
Excavation progresses while measuring the degree of inclination of the excavation hole and correcting the excavation direction as necessary.

Conventionally, a plurality of inclinometers have been installed on a drilling rod or an excavator at regular intervals from the tip side, and measurement data output from the inclinometer has been captured by a computer installed on the ground. It is to measure with. At this time, the transmission of the measurement data from the inclinometer is performed using a cable and a method disclosed in JP-A-11-348.
As disclosed in Japanese Patent Application Laid-Open No. 7-107, there is a method of performing wireless communication.

[0004] In the case of using a cable, each inclinometer and a computer are individually connected by a cable, and measurement data is individually transmitted from each inclinometer by a cable. On the other hand, in the case of wireless communication as disclosed in Japanese Patent Application Laid-Open No. H11-3487, an optical communication means is provided in each inclinometer, and measurement data is transmitted by optical communication between the optical communication means. I have.

[0005]

However, in the method of individually connecting each inclinometer and the computer with a cable to transmit measurement data, the wiring of the cable becomes complicated as the number of inclinometers to be installed increases. There are drawbacks.
On the other hand, in the case of wireless communication as disclosed in Japanese Patent Application Laid-Open No. H11-3487, each inclinometer must be provided with an optical communication means or a built-in battery, resulting in a complicated and expensive system configuration. Disadvantage.

The present invention has been made in view of such circumstances, and has as its object to provide a measurement data transmission system for an excavator having a simple configuration.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a measurement data of an excavator for transmitting measurement data from a plurality of measuring instruments installed on an excavating means for excavating a ground to a computing unit on the ground. In a transmission system, an arbitrary number of measuring instruments from the leading measuring instrument to the terminating instrument are connected in series by connecting two measuring instruments with a cable, and the terminating instrument is connected to the computing device with a cable Connecting means, a common signal line for transmitting measurement data measured by each measuring instrument to the arithmetic unit through each measuring instrument and cable connected by the connecting means, and a measuring instrument at the leading end to a measuring instrument at the end. Or measurement data transmission means for sequentially transmitting measurement data measured by each measuring instrument to the arithmetic unit through the signal line from the last measuring instrument to the leading measuring instrument. Wherein the excavator measurement data transmission system according to symptoms.

According to the present invention, the measuring devices are connected in series via a cable, and the measurement data is transmitted to the computing device via the cable in order from the leading or trailing measuring device. This eliminates the need to individually connect the measuring instrument and the arithmetic unit with a cable, and simplifies the configuration. Also,
There is no need to provide optical communication means or incorporate a battery, and an inexpensive system can be configured.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a measurement data transmission system for an excavator according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a system configuration diagram of an excavator tilt amount measuring system to which a measurement data transmission system according to the present invention is applied. This inclination amount measuring system 1 is a system for measuring an inclination amount of a digging cutter or the like for digging the ground, and includes a plurality of measuring instruments 2A, 2B,.
A, 2B,... And a computer 3 for performing arithmetic processing on the measurement data.

Each of the measuring instruments 2A, 2B,... Is attached to a digging cutter or the like at predetermined intervals, and the measuring instruments are connected in series by a multi-core cable 4. The multi-core cable 4 includes a measurement data output line 4A, a measurement start signal input line 4B, and a measurement start signal transmission line 4C, and is connected to the measuring instruments 2A, 2B,.

Each of the measuring instruments 2A, 2B,... Is configured such that an inclinometer 6 and a relay board 7 are housed in a sealed water-resistant case. The inclinometer 6 measures the amount of inclination of the excavating cutter or the like, and outputs the measurement data to the computer 3 using the measurement data output line 4A of the multicore cable 4. Here, a contact 8 is provided between the inclinometer 6 and the measurement data output line 4A. When the contact 8 closes, measurement data is transmitted from the inclinometer 6 to the computer 3.

When the measurement start signal is input, the relay board 7 closes the contact 8 of the inclinometer 6 and causes the computer 3 to output the measurement data from the inclinometer 6 and opens the contact 8 after a predetermined time elapses. Stop output of
Then, a measurement start signal is output to the next measuring instrument using the measurement start signal transmission line 4C.

The operation of the tilt amount measuring system 1 according to the present embodiment configured as described above is as follows.

When a measurement start signal is output from the computer 3, the measurement start signal is input to the relay board 7 of the measuring instrument 2 A at the tip via the measurement start signal input line 4 B of the multicore cable 4.

When this measurement start signal is input, the relay board 7 closes the contact 8 of the inclinometer 6. Thereby, the measurement data of the inclination amount at the installation point of the measuring instrument 2A is output from the inclinometer 6 of the measuring instrument 2A at the tip to the computer 3 via the measurement data output line 4A of the multicore cable 4.

The output of the measurement data is continuously performed for a predetermined time, and when the predetermined time has elapsed, the relay board 7 opens the contact 8 and stops the output of the measurement data. Then, a measurement start signal is output to the relay board 7 of the measuring instrument.

Here, the measurement start signal is transmitted via the measurement start signal transmission line 4C of the multi-core cable 4, and the relay board 7 of the next measuring instrument 2B receives the measurement start signal, The contact 8 of 6 is closed. As a result, measurement data of the amount of inclination at the installation point of the next measuring instrument 2B is output from the inclinometer 6 of the next measuring instrument 2B to the computer 3 via the measurement data output line 4A of the multicore cable 4.

Hereinafter, the measurement data of the measuring instruments 2A, 2B,... The computer 3 performs arithmetic processing on the input measurement data and displays the data on a display or the like.

As described above, according to the excavator tilt amount measuring system 1 to which the measuring data transmission system according to the present invention is applied, the measuring instruments 2A, 2B,... Are connected in series via the multi-core cable 4. Then, the measurement data is sequentially transmitted to the computer 3 via the multi-core cable 4 from the measuring instrument 2A at the tip. This eliminates the need to individually connect each of the measuring instruments 2A, 2B,... To the computer 3 with a cable, and can easily add any number of measuring instruments without complicating the wiring.

Although the power supply line is omitted in FIG. 1, the power is supplied to each of the measuring instruments 2A, 2B,... Via the multi-core cable 4, and there is no need to incorporate a battery. . Thus, a simple and inexpensive system can be configured.

By attaching the measuring instruments 2A, 2B,... At predetermined intervals, the computer 3 can determine the depth from the number of measurement data obtained, and simultaneously performs the measurement of the inclination amount and the measurement of the depth. be able to.

In this embodiment, the measurement data is transmitted in order from the measuring instrument on the distal end side. However, the measurement data is transmitted in order from the measuring instrument on the terminal side toward the distal end side. You may comprise.

In the present embodiment, an example in which the measurement data of the inclinometer 6 is transmitted has been described. However, the present invention can be similarly applied to the case of transmitting the measurement data of another measuring instrument.

[0025]

Next, an embodiment in which the measurement data transmission system for an excavator according to the present invention is applied to an inclination amount measurement system for a horizontal excavator will be described.

FIG. 2 is an overall configuration diagram of a horizontal excavator to which the measurement data transmission system according to the present invention is applied.

First, the configuration of the horizontal excavator 10 will be described. As shown in FIG. 2, the horizontal excavator 10 includes a traveling unit 12, a feed unit 14, and an excavation unit 16.

The traveling section 12 is constituted by a self-propelled carriage 18 having an endless track, and runs by driving the endless track by driving means (not shown).

The feeding section 14 is provided with a self-propelled carriage 18 of the traveling section 12.
It is provided on the upper side, and includes a guide frame 20 and a feed base 22. Guide frame 20
Is vertically mounted on the side surface of the self-propelled carriage 18, and the feed base 22 is moved up and down on the guide frame 20 by the drive means (not shown).

The excavating section 16 is provided on the feed base 22 of the feeding section 14 and includes a power swivel 24 and an excavating cutter 26. Power swivel 2
4 is provided on the feed base 22, and a drilling cutter 26 is connected to a lower portion of the power swivel 24.

The excavating cutter 26 includes a tip cutter block 28 and a cutter block 30.
The tip cutter block 28 is configured by disposing cutter rods 34 at front and rear positions of a tip support frame 32 formed with a sharp tip. On the outer periphery of the cutter rod 34, a screw auger having a large number of teeth implanted on a peripheral edge is attached. On the other hand, the cutter block 30 is configured by disposing cutter rods 40 at front and rear positions of a support frame 38 formed in a box shape.
On the outer periphery of the cutter rod 40, a screw auger having a large number of teeth implanted on its peripheral edge is attached.

The excavating cutter 26 is formed to a predetermined length by sequentially connecting a cutter block 30 to an upper portion of a tip cutter block 28. The excavating cutter 26 thus formed is connected to the power swivel 24
, And driven by the power swivel 24, the cutter rods 34, 40 rotate.

The horizontal excavator 10 configured as described above
Then, drive the power swivel 24 to move the cutter rod 3
By lowering the feed base 22 while rotating the cutter rods 34 and 40, the rotating cutter rod 34,
40 excavates the ground in the vertical direction. At this time, excavation is performed while sequentially adding the cutter rods 34. The excavator 26 excavated to a predetermined depth excavates the ground in the lateral direction by rotating the cutter rods 34 and 40 by moving the self-propelled carriage 18 in the lateral direction.

Next, the configuration of a measurement data transmission system applied to the horizontal excavator 10 configured as described above will be described.

The measurement data transmission system is a drilling cutter 2
6 is applied to a tilt amount measuring system for measuring a tilt amount. As shown in FIGS. 2 and 3, the inclination amount measuring system includes a plurality of measuring instruments 52 attached to the excavating cutter 26 to measure the amount of inclination of the excavating cutter 26, and a feed base 22 attached to the guide frame 20. The main components are a stroke meter 54 for measuring the descending amount of the data, a computer 56 for taking in measurement data measured by the measuring device 52 and the stroke meter 54, performing arithmetic processing and displaying a result on a display, and a switchboard 58. It is configured.

The measuring instruments 52 are attached to the respective cutter blocks 28 and 30 constituting the excavating cutter 26. The measuring instruments 52 are connected in series by connecting adjacent measuring instruments with a multi-core cable 60. ing.

As shown in FIG. 4, the measuring device 52 comprises an X-axis sensor 64, a Y-axis sensor 66, and a relay board 68 housed in a sealed water-resistant box 62. And the multi-core cable 60.

An X-axis sensor 64 provided inside the water-resistant box 62 measures the amount of inclination of the excavating cutter 26 in the X-axis direction, that is, in FIG. The X-axis sensor 64 is connected to terminals +12, -12, SIGX, and 0V of the underwater connector 70, as shown in FIG. Then, driven by the power input from the terminals +12 and -12, the terminal SI
Output measurement data to GX, 0V.

On the other hand, the Y-axis sensor 66
6, the amount of tilt in the direction perpendicular to the paper surface in FIG. 2 is measured. This Y-axis sensor 66 is shown in FIG.
As shown in the figure, the terminals of the underwater connector 70 +12, -12, SI
GY, connected to 0V. Then, it is driven by the power input from the terminals +12 and -12, and outputs the measurement data to the terminals SIGY and 0V.

As shown in FIG. 3, the relay board 68 is connected to the terminals + 12A and -12C of the underwater connector 70, and operates with power input from the terminals + 12A and -12C. As shown in FIG. 5, this relay board 68
Time limit relay TA, second time limit relay TB and relay RX1
It is composed of

The first time relay TA has a relay coil 72
And contacts 74A and 74B. When a current flows through the relay coil 72, the contact 74A is opened 5 seconds later, and at the same time, the contact 74B is closed.

The second time relay TB includes a relay coil 76
And a contact 78. When a current flows through the relay coil 76, the contact 78 is closed after one second.

The relay RX1 comprises a relay coil 80 and contacts 82A and 82B.
When a current flows through the contacts 82A and 82B, the contacts 82A and 82B are closed.

The relay coil 72 of the first time relay TA, the relay coil 76 of the second time relay TB, and the relay coil 80 of the relay RX1 are connected in parallel. The contact 74A of the first time relay TA is connected in series with the relay coil 80 of the relay RX1, and the contact 74B of the first time relay TA is connected in series with the relay coil 76 of the second time relay TB. ing.

As shown in FIG. 3, the contact 78 of the second time relay TB is connected to the relay board 68 and the underwater connector 7.
It is installed on a conducting wire 84 connecting the terminal + 12C of 0.
The contact 82A of the relay RX1 is installed on a conductor 86 connecting the X-axis sensor 64 and the terminal SIGX of the underwater connector 70, and the contact 82B connects the Y-axis sensor 66 and the terminal SIGY of the underwater connector 70. Is installed on the conducting wire 88.

As shown in FIG. 3, the measuring instrument 52 configured as described above is configured such that adjacent measuring instruments are connected to each other by the underwater connector 7.
0 through a multi-core cable 60. The measuring instrument 52 at the end is connected to the switchboard 5 via the multi-core cable 60.
8 connector 90. At this time, the multicore cable 60 connects the same terminals of the underwater connector 70 and the connector 90.

The switchboard 58 is, as shown in FIG.
2 and a sequencer 94. The power supply 92
The power supply 92 is connected to the terminals +12, -12, + 12A of the connector 90, and is connected to the terminals +12, -12, + 12A.
Electric power is supplied to the axis sensor 64, the Y-axis sensor 66, and the relay board 68. The sequencer 94 is connected to the terminals SIGX, SIGY, 0V, and + 12C of the connector 90.
X is applied to sequencer 94 via this terminal SIGX, SIGY, 0V.
Measurement data of the axis sensor 64 and the Y-axis sensor 66 are input. Also, a measurement end signal is input to the sequencer 94 via this terminal + 12C.

The sequencer 94 is connected to the switch board 98 and the computer 56 by a cable 96. The computer 56 is connected to the sequencer 94
The measurement data of the axis sensor 64 and the Y-axis sensor 66 are input, and the measurement data is processed and displayed on a display.

The switch board 98 has a measurement start button and a measurement end button (not shown). When the measurement start button is pressed, the relay R installed in the switchboard 58
When power is applied to the X relay coil 100 and the measurement end button is pressed, the supply of power to the relay coil 100 is stopped. When power is applied to the relay coil 100 of the relay RX, the power supply 92 and the connector 90
Contact 1 provided on the conductive wire 102 connecting the terminal + 12A
04A and the contact 104B provided on the conductor 106 connecting the sequencer 94 and the terminal 0V of the connector 90 are closed, and power is applied to the relay board 68 provided inside the measuring instrument 52 (No. 1) at the tip. Measurement is started. On the other hand, when the supply of power to the relay coil 100 of the relay RX is stopped, the contacts 104A and 104B open,
The measurement ends.

The horizontal excavator 10 constructed as described above
The operation of the inclination amount measuring system is as follows.

For example, when performing measurement while excavating the ground in the vertical direction with the horizontal excavator 10, the operator first presses the measurement start button on the switch board 98. When this measurement start button is pressed, power is applied to the relay coil 100 of the relay RX installed in the switchboard 58, and the contact 10
4A and 104B are closed. As a result, power is supplied to the X-axis sensor 64 and the Y-axis sensor 66 of each measuring instrument 52 through the multi-core cable 60 and each measuring instrument 52, and the relay board 68 of the measuring instrument 52 at the tip (No. 1) is supplied. Power is applied to the

When power is applied to the relay board 68 of the measuring instrument 52 (No. 1) at the tip, as shown in FIG. 5, a current is applied to the relay coil 72 of the first timed relay TA and the relay coil 80 of the relay RX1. Flows.

When a current flows through the relay coil 80 of the relay RX1, as shown in FIG.
A and 82B are closed, and the measurement data is transmitted from the X-axis sensor 64 and the Y-axis sensor 66 of the measuring device 52 (No. 1) at the tip to the sequencer 94 via the multi-core cable 60 and each measuring device 52. Sequencer 94 outputs the measurement data to computer 56.

On the other hand, as shown in FIG. 5, the relay coil 72 of the first time relay TA opens the contact 74A five seconds after the current is supplied. At the same time, the contact 74B
Close. As a result, the relay coil 80 of the relay RX1
The supply of current to the relay is stopped, and instead, the current flows through the relay coil 76 of the second time relay TB.

When the supply of current to the relay coil 80 of the relay RX1 is stopped, as shown in FIG.
Contacts 82A and 82B are opened, and the measuring instrument 52 (No.
The transmission of the measurement data by the X-axis sensor 64 and the Y-axis sensor 66 in 1) is stopped.

On the other hand, when a current flows through the relay coil 76 of the second time relay TB, the contact 78 of the second time relay TB closes after one second. As a result, the measuring instrument 52 (No.
The supply of power to the relay board 68 of 1) is stopped, and power is applied to the relay board 68 of the next measuring instrument 52 (No. 2).

The relay board 6 of the next measuring instrument 52 (No. 2)
When electric power is applied to the multi-core cable 6 from the X-axis sensor 64 and the Y-axis sensor 66 in the same manner as described above.
0 and the measurement data are transmitted to the sequencer 94 through each measuring device 52. The transmission of the measurement data is stopped after 5 seconds, and the supply of power to the relay board 68 is stopped after 1 second. Then, power is supplied to the relay board 68 of the next measuring instrument 52 (No. 3).

Thereafter, the measuring instrument 52 at the end is operated in the same manner.
The measurement data of the X-axis sensor 64 and the Y-axis sensor 66 are sequentially transmitted to the sequencer 94 until (No. N). Then, when the transmission of the measurement data by the terminal measuring device 52 (No. N) ends, the power of the relay boards 68 of all the measuring devices 52 is turned off, and a current indicating a measurement end signal flows through the sequencer 94. That is, the contact 78 of the second time limit relay TB of the terminal measuring device 52 (No. N) is closed, and a current indicating the end of measurement flows through the sequencer 94.

When a current indicating the end of measurement flows through the sequencer 94, the contacts 104A and 104B of the relay RX are opened, and one cycle of measurement is completed. The operator presses the measurement end button on the switch board 98 to end the measurement with this. Thus, the measurement ends.

On the other hand, when the measurement end button is not pressed, the measurement is repeated. That is, the contacts 104A and 104B of the relay RX are closed, power is supplied to the X-axis sensor 64 and the Y-axis sensor 66 of each measuring device 52, and the relay board 68 of the measuring device 52 (No. 1) at the leading end is closed. , And the measurement is restarted from the measuring instrument 52 (No. 1) at the tip.

At the stage when the measurement of one cycle is completed, the computer 56 performs arithmetic processing on the measurement data output from each measuring instrument 52 to calculate the amount of inclination at the installation point of each measuring instrument 52.

Here, each measuring instrument 52 is provided with the excavator 2
6, the depth of the excavation hole and the position of each measuring device can also be measured based on the number of measurement data output from each measuring device 52. That is, as shown in FIG. 2, the tip cutter block 28 and the respective cutter blocks 28 that constitute the excavating cutter 26 are all formed with the same length L, and the respective measuring instruments 52 have the same height as the respective cutter blocks 28 and 30. It is attached to the position T. Now, four measurement data are stored in the computer 56
, It is understood that the number of the measuring devices 52 is four, and that the number of the cutter blocks 28 and 30 is also four. Therefore, drilling cutter 2
The total length of 6 is (4 × L). On the other hand, the drilling cutter 26
Is measured by the stroke meter 54, and it is assumed that the descending amount of the excavating cutter 26 input to the computer 56 from the stroke meter 54 is S.
In this case, the depth D of the excavation hole is D = (4 × LS). The position D ₁ of the measuring instrument 52 (No. 1) at the tip is D ₁
= [(4 × LS) −T], and the position D ₂ of the second measuring instrument 52 (No. 2) is D ₂ = [(3 × LS) −.
T]. Similarly, the position D ₃ of the third measuring device 52 (No. 3) is D ₃ = [(2 × LS) −T], and the position D ₄ of the terminal measuring device 52 (No. 4) is D ₄ = [(LS)-
T].

Further, the displacement amount δ of the excavating cutter 26 at the installation position of each measuring device 52 can be obtained from the measured depth and the measurement data of the inclination amount by each measuring device 52. For example, if the measurement data of the inclination amount of the terminal measuring instrument 52 (No. 4) is θ ₄ , the terminal measuring instrument 52 (No. 4)
The displacement amount δ ₄ of the excavating cutter 26 at the installation position of (No. 4) is δ ₄ = (L × sin θ ₄ ). If the measurement data of the inclination amount of the third measuring device 52 (No. 3) is θ ₃ , the displacement amount δ of the excavating cutter 26 at the installation position of the third measuring device 52 (No. 3) ₃ is δ ₄ = (δ ₄ +
L × sin θ ₃ ). Similarly, the second measuring device 52
If the inclination amount of measurement data (No.2) is to be theta _2,
The displacement amount δ ₂ of the excavating cutter 26 at the installation position of the second measuring device 52 (No. 2) is δ ₂ = (δ ₄ + δ ₃ + L × s)
in θ ₂ ), and if the measurement data of the amount of inclination of the tip measuring instrument 52 (No. 1) is θ ₁ , the tip measuring instrument 52 (No. 1)
The displacement amount δ ₁ of the excavating cutter 26 at the installation position of (No. 1) is δ ₁ = (δ ₄ + δ ₃ + δ ₂ + L × sin θ ₁ ).

When the measurement of one cycle is completed, the computer 56 calculates the amount of inclination at the installation point of each measuring device 52, and also calculates the depth and the amount of displacement, and as shown in FIG. Display on the display. In FIG. 6, the horizontal axis represents the amount of displacement, and the vertical axis represents the depth.

As described above, according to the inclination measuring system 50 of the present embodiment, the measuring data is sequentially outputted from the measuring instruments 52 connected in series by the multi-core cable 60 to the computer 56. Any number of measuring instruments 52 can be easily added without complicating the wiring.

In addition, since the power is not supplied to each measuring instrument 52 individually, but is supplied to each measuring instrument 52 via a multi-core cable 60 from a distribution board 58 installed on the ground, the configuration is simplified. As well as providing an inexpensive system.

Further, the measurement can be performed in real time even during excavation, and the depth can be measured simultaneously with the measurement of the inclination amount.

In the present embodiment, the measurement data transmission system according to the present invention is applied to the inclination measuring system for the horizontal excavator 10, but as shown in FIG. It can also be applied to In this case, the measuring device 52 is attached to a binding band 124 that binds the auger shaft 122 of the earth auger.

[0069]

As described above, according to the present invention,
There is no need to individually connect each measuring instrument and the arithmetic unit with a cable, and an arbitrary number of measuring instruments can be easily added without complicating the wiring. There is no need to provide optical communication means or incorporate a battery, and a simple and inexpensive system can be configured.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a tilt amount measurement system to which the present invention is applied.

FIG. 2 is an overall configuration diagram of a horizontal excavator.

FIG. 3 is a system configuration diagram of a tilt amount measurement system.

FIG. 4 is a configuration diagram of a measuring instrument.

FIG. 5 is a circuit diagram of a relay block.

FIG. 6 is a diagram showing a measurement result of a tilt amount.

FIG. 7 is an overall configuration diagram of a multi-axis excavator to which the tilt amount measurement system is applied.

[Explanation of symbols]

1 ... tilt amount measuring system, 2A, 2B, 2X ... measuring instrument,
3 ... Computer, 4 ... Multi-core cable, 4A ... Measurement data output line, 4B ... Measurement start signal input line, 4C ... Measurement start signal transmission line, 5 ... Connector, 6 ... Inclinometer, 7 ... Relay board, 8 ... Contact Reference numeral 10: horizontal excavator, 26: excavator, 28: tip cutter block, 30: cutter block, 52: measuring instrument, 54: stroke meter, 56: computer, 58: switchboard, 60: multi-core cable, 62
... water-resistant box, 64 ... X-axis sensor, 66 ... Y-axis sensor, 68 ... relay board, 70 ... underwater connector, 72,
76, 80, 100 ... relay coils 74A, 74B, 7
8, 82A, 82B, 104A, 104B ... contact point, 90
... Connector, 92 ... Power supply, 94 ... Sequencer, 96 ...
Cable, 98: Switch board, TA: 1st time relay, TB: 2nd time relay, RX1: relay, RX: relay

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E21B 47/18 G08C 19/00

Claims (3)

[Claims] 1. A measurement data transmission system for an excavator for transmitting measurement data from a plurality of measuring instruments installed in an excavating means for excavating the ground to a computing unit on the ground, wherein two measuring instruments are connected by a cable. A connecting means for connecting an arbitrary number of measuring instruments from the leading measuring instrument to the terminating measuring instrument in series, and connecting the terminating measuring instrument to the computing device by a cable, and each measuring instrument connected by the connecting means And a common signal line for transmitting measurement data measured by each measuring instrument to the arithmetic unit through a cable, and from the leading measuring instrument to the last measuring instrument, or from the last measuring instrument to the leading measuring instrument in sequence. A measurement data transmission system for an excavator, comprising: measurement data transmission means for transmitting measurement data measured by each measurement device to the arithmetic unit via a signal line. 2. The measurement data transmission means, comprising: a contact for joining the measuring instrument and the common signal line; and a measurement start signal, the contact being opened to open the contact and pass the measuring instrument through the common signal line. Along with transmitting the measurement data to the arithmetic unit, when a predetermined time has elapsed, the contact opening / closing means for closing the contact, and when the contact opening / closing means opens the contact, measurement is performed on the contact opening / closing means provided in the next measuring instrument. 2. A measurement start signal output means for outputting a start signal.
An excavator measurement data transmission system as described in the above. 3. The method according to claim 1, wherein each of the measuring devices is installed at regular intervals along a vertical direction of the excavating means, and the computing device detects a depth of the excavation hole based on the number of input measurement data. The measurement data transmission system for an excavator according to claim 1 or 2, wherein: