JP3045387B2 - Location management system for tunnel excavation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a location management system at the time of tunnel excavation for confirming the locations of workers and equipment in a tunnel or a shield machine during tunnel excavation.

[0002]

2. Description of the Related Art Conventionally, in order to secure safety in a tunnel, an identification sign (ID tag) is attached to a worker or equipment.
A technique for detecting microwaves by a plurality of sensors provided in a tunnel is disclosed in, for example, Japanese Patent Application Laid-Open No. 4-93500.

However, with the recent increase in the diameter of the tunnel cross section, the walking path for workers and the transportation path for materials and equipment have become wider, and if a plurality of paths are provided, the detection range of the conventional radio wave type sensor is limited. Therefore, a large number of sensors must be mounted unnecessarily. An electromagnetic induction method that reads the information of an ID tag in a non-contact manner with a low-frequency current is also known. However, since the distance is short, a gate or the like through which a person must pass must be provided. An error occurs due to the inverter noise used in the equipment.

It is known to use an infrared sensor to prevent theft. An infrared sensor is preferable because it can cover a relatively wide range. However, in the case of ordinary theft prevention, it does not sense an identification mark such as an ID tag, but detects whether or not a person is within an identification range of the sensor.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a location management system at the time of tunnel excavation which can surely detect the positions of workers and equipment in a tunnel or a shield machine and contribute to safety management. It is in.

[0006]

[0007]

According to the present invention, there is provided a location management system for detecting a worker in a tunnel excavator, the location and the work position of all workers in the tunnel and the tunnel excavator. A plurality of infrared readers that irradiate the lights are installed, identification signs that can be read by these infrared readers are attached to all workers, and these infrared readers are installed in offices via cable lines. The control device determines whether data from the identification mark is received by the infrared reader once every predetermined time or not. It is determined that the worker has moved out of the detection zone of the infrared reader, the name of the worker flashes, and one of the infrared readers recognizes again. If no data is received after a predetermined time again when not receiving the data from the label has a function of displaying the worker is missing.

[0008] Therefore, it is possible to know at what time and in which infrared reader the detection range of the worker or the equipment is located in the tunnel or the tunnel excavator. In particular, the infrared reader has a wide detection range, so even in a tunnel with a large cross section, the entire path (usually the lower flat part,
Can be covered by a passage at the top of the side).

Therefore, in shield tunnel construction, mountain tunnel construction, underground large space construction, etc., it is possible to accurately grasp the positions of workers, materials and equipment, and construction machines, and to enter and exit workers, materials and equipment, and construction machines. The pit can be reliably managed. In particular, it is preferable in terms of safety management because the presence of a worker working in a dangerous zone inside the tunnel excavator or a worker working around a construction machine can be grasped.

[0010] Further, by using infrared light of the diffusion method, an identification mark (ID tag) in a hemispherical detection area having a radius of about 30 m can be detected, and the location can be managed in real time.

[0011] Since infrared data is transmitted, there is no influence of noise and data can be transmitted reliably. Furthermore, it is preferable in terms of safety management of workers to add a function as a motion sensor (stop signal transmission when there is no operation for a certain period of time) to the identification sign.

The work efficiency can be improved by attaching identification signs for construction machines and materials and equipment. The infrared reader can be extended with a wiring cable and can be placed effectively when tunneling.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view for explaining an embodiment of the present invention, and a tunnel T is excavated by a shield machine M which is a tunnel excavator from a shaft V excavated from the ground E as a starting point. In the tunnel T, a central control room C is provided, and a plurality of infrared readers (six in the illustrated example) L1 to L6 are arranged at predetermined intervals L (for example, 250 m).
Each is provided above the tunnel T. These readers L1 to L6 are connected in series to a cable line W1, and a predetermined length (for example, 5
00m) every time the repeater / power supply unit U1, U2, U3
Is connected. Further, the cable line W1 is connected to infrared readers L1, L8 arranged in the shield machine J and an infrared reader L9 in the central control room C. At the entrance of the cable line W1, infrared readers L10 and L11 installed at the entrance to check entrance and exit are connected in series. In the illustrated example, two wellheads are provided, and each of them has an infrared reader.

An office control device (personal computer) P1 is provided in the office O provided on the ground, and the cable line W
1 is connected to the control device P1 via a PC card and a power supply unit U1. This control device P1 is connected to the line W2
Is connected to the hub H1 via a line W
The hub H2 is connected via a transceiver Tr1 connected in series via another line W4 which forms a communication line to the personal computer P2 for displaying an entrance and via a transceiver Tr2 in the central control room C. The hub H2 is connected to a control device (personal computer) P3 in the central control room. Further, the hub H1 is connected to the first router R1 and the second router R1 is connected via the telephone line TL.
2, and further connected to, for example, a customer's personal computer P4 via a hub H3.

On the other hand, an ID tag I1 as an identification mark is attached to the worker M, and the ID tag is also attached to the work vehicle and the construction machine K1.
D tag I2 is attached. Although not shown, an ID tag can be attached to materials and equipment, for example, a segment, if necessary.

The infrared readers L1 to L6 can cover the passages of the worker M and the construction machine K in the tunnel T, respectively, so that the positions of the worker M and the construction machine K (the tunnel Position in the longitudinal direction). A new infrared reader, repeater, and power supply unit may be connected in series as the tunnel is dug. Further, the infrared readers L7 and L8 can detect the position of the worker in the shield machine J. Further, the same display can be performed on the personal computers P2 to P4 to facilitate the management. FIG. 2 is a block diagram showing an embodiment of the present invention. An ID tag I1 serving as an identification marker transmits infrared rays as a transmission means at predetermined time intervals, for example, every 4 seconds. ID tag I1 is infrared reader L
N of the infrared reader LN
Receives the signal, it is input to the personal computer P1 via the data receiving interface unit IP via the cable line W1 composed of a six-core cable.

The received data includes the infrared reader number and I
The D-tag number and the reception intensity of the received reader are leveled and input to the personal computer P1.

Next, the operation will be described with reference to FIG.

First, the operation is started, and the ID tag I of the worker M is set.
Data is periodically transmitted from 1 for a predetermined time, for example, once every 4 seconds (step S1). Each infrared reader L1 to L
12 is in a state of waiting for reception of data from the ID tag (step S2). Therefore, the interface unit IF as a control device determines whether there is data, that is, a signal from the ID tag (step S3). When the signal is received, the infrared reader number and the ID tag number are transmitted to the personal computer P1 by adding a digitized level of the reception intensity of the infrared reader (step S).
4). Next, when there is data of the same ID number from a plurality of infrared readers, that is, it is determined whether or not the worker M is located in a detection zone of the plurality of infrared readers (step S5). If YES in step S5, it is determined that the ID tag is in the detection zone of the infrared reader with the highest level (step S6). When the position of the ID tag is specified in this way, the name of the worker and the names of the construction machines and materials are confirmed from the ID tag number (step S7), and the position of the infrared reader is displayed on the display of the personal computer P1. That is, the name of the worker or the name of the construction machine or material is displayed for each detection zone of each infrared reader (step S8).

The above is the operation for confirming the positions of the workers and the construction machines, etc. Further, according to the present invention, the movement status can be known.

The data from the ID tag is stored for a predetermined time, for example, 4
It is determined once every second whether the infrared reader is receiving (step S9). If the worker M moves out of the detection zone, the infrared reader stops receiving the data. In such a case, it is determined whether or not a certain period of time, for example, 8 seconds, has elapsed since the reception of the data was stopped. (Step S10). If step 10 is YES, it is determined that the worker has moved out of the reception area, that is, out of the detection zone of the infrared reader, and the name of the worker or the name of the construction machine is blinked (step S11). Then, it is determined whether or not any of the infrared readers has again received data from the ID tag (step S12). If step S12 is NO, whether or not data is not received again after a predetermined time, for example, 8 seconds Is determined (Step S13), and if Step S13 is YES, the worker M is determined to be missing and the name is reversed and displayed (Step S14). Step S
If YES in step 12 and NO in step S13, the blinking of the worker's name is released (step S15).

[0022]

As described above, according to the present invention, a wide range (for example, a radius of 30 m) can be detected by the infrared reader, and the infrared reader can be suitably used when excavating a tunnel.

In addition, confirmation of workers, construction machines and materials and equipment,
It can contribute to the safety of workers. Further, since the infrared readers can be connected in series, the connection work is easy when excavating a tunnel.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention.

FIG. 2 is a block diagram showing an example in which the present invention is implemented.

FIG. 3 is a flowchart showing an example of the operation of the present invention.

[Explanation of symbols]

 L1 to L12: infrared reader M: worker I1, I2: ID tag K: construction machine P1 to P4: personal computer T: tunnel J: shield machine

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-297156 (JP, A) JP-A-10-127902 (JP, A) Patent 2700278 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) E21F 11/00 E04G 21/00

Claims (1)

(57) [Claims] In a tunnel excavation location management system for detecting a worker in a tunnel excavator, a plurality of infrared readers for illuminating the traffic and work positions of all workers in the tunnel and the tunnel excavator are arranged. ,
Identification tags that can be read by these infrared readers are attached to all workers, and those infrared readers are connected via cable lines to office control devices provided in offices, and the control devices are connected to the identification markers. It is determined whether or not the infrared reader is receiving the data once every predetermined time, and when a certain time has elapsed since the data was not received, the worker moved out of the detection zone of the infrared reader. Judge that it is a thing and blink the name of the worker,
A tunnel excavator having a function of displaying that a worker is missing if any of the infrared readers does not receive data from the identification mark again and does not receive data after a certain period of time again Time location management system.