A shield machine cutter motion trajectory detection system

Abstract

The present invention discloses a shield machine cutter motion trajectory detection system, including an RFID chip fixedly embedded on the shield machine cutter, a reader fixedly arranged on the rear surface of the cutter disc and rotating with the cutter disc, a wireless communication module, and a terminal processing module arranged in the control room, wherein the reader receives an excitation signal and converts it into a pulse signal and sends it to the terminal processing module through the wireless communication module; the terminal processing module analyzes and processes the pulse signal and converts it into motion trajectory data and displays the analysis result. In the shield machine cutter motion trajectory detection system of the present invention, the RFID chip only rotates relative to the position of the reader, and when analyzing whether the cutter is damaged, only its rotation motion needs to be considered without considering the circumferential motion of the cutter and the cutter disc, and the factors of data analysis are reduced, which reduces the amount of data analysis of the terminal processing module and makes the cutter status analysis more accurate.

Description

Technical Field

[0001] The invention belongs to the technical field of tool state detection, in particular to a shield machine cutter motion trajectory detection system. Background Art

[0002] Tunnel boring machines include hard rock tunnel boring machines (commonly known as TBMs in China) and shield machines. TBMs are generally used for mountain tunnels or large water diversion projects; shield machines are mainly used for excavation in soft rock and soil strata such as urban subways. Both TBMs and shield machines are equipped with disc-shaped rollers (hereinafter referred to as rollers) installed on the cutterhead seat to directly roll and crush the rocks on the face.

[0003] During the construction of a tunnel boring machine, when the cutter is in normal working condition, the cutter can rotate with the rotation of the cutterhead, and continuously contact the tunnel face during the rotation process, cutting the tunnel face rock layer by rotating and rolling to break the rock, thus realizing tunnel excavation. Once the cutter does not rotate with the rotation of the cutterhead, the cutter will be worn eccentrically or even chipped, which requires timely maintenance, otherwise it may cause damage to the cutterhead surface or the hub, increasing economic losses. Taking the shield machine as an example, during excavation, due to the balance cabin facility installed behind the cutterhead of the shield machine and the fact that the roller cutter may directly penetrate into the soil and be blocked by the soil during excavation, it is impossible to visually observe the movement state of the roller cutter. In addition, the space structure of the cutterhead of the tunnel boring machine is narrow, and it is difficult to embed and install various motion trajectory sensors. Even if various visual sensors are installed, the extremely harsh working environment of the tunnel boring machine, sand and stone splashing, rock debris impact and friction, etc., pose a great threat to the sensor. At the same time, the harsh environment will also interfere with the collection and transmission of sensor signals. Moreover, when the tunnel boring machine is working, the cutterhead and the roller cutter are always in a state of rotation around the axis, and it is difficult for the sensor to transmit the signal to the control room behind the cutterhead through wiring. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a shield machine cutter motion trajectory detection system, comprising an RFID chip (130), a reader (300), a wireless communication module (310), and a terminal processing module (400).

[0005] The RFID chip (130) is fixedly embedded on the roller cutter of the shield machine and can emit an excitation signal outward;

[0006] The reader (300) and the wireless communication module (310) are both fixedly arranged on the rear surface of the cutter disc and can rotate together with the cutter disc;

[0007] The reader (300) receives the excitation signal and converts it into a pulse signal and wirelessly sends the pulse signal to the terminal processing module (400) via a wireless communication module (310);

[0008] The terminal processing module (400) comprises a state analysis module (410) and a display module (420); the state analysis module (410) is used to analyze and process the pulse signal and convert it into motion trajectory data; and the display module (420) is used to display the analysis result of the state analysis module (410).

[0009] Furthermore, a side blind hole (140) is provided on the axial end surface of at least one of the cutter ring, the cutter hub or the retaining ring on the hob; and the RFID chip is embedded in the side blind hole.

[0010] Furthermore, an FRP reinforcement layer (220), an absorbing material layer (210), and a high temperature resistant material layer (200) are sequentially arranged between the RFID chip and the inner wall of the side blind hole from the inside to the outside.

[0011] Furthermore, the opening of the side blind hole (140) is also provided with a waterproof layer and a non-magnetic steel material layer to seal the RFID chip inside the side blind hole (140).

[0012] Furthermore, the terminal processing module is arranged in the control room.

[0013] The shield machine cutter motion trajectory detection system of the present invention sets the RFID chip on the cutter and sets the reader on the cutterhead. The cutter only rotates relative to the cutterhead, that is, the RFID chip only rotates relative to the position of the reader. When analyzing whether the cutter is damaged, only its rotation motion needs to be considered without considering the circumferential motion of the cutter and the cutterhead, which reduces data analysis factors, reduces the amount of data analysis of the terminal processing module, and makes the cutter status analysis simpler and more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the roller cutter in the roller cutter motion trajectory detection system of the shield machine of the present invention;

[0015] Figure 2 It is a schematic diagram of the RFID chip installation structure in the shield machine cutter motion trajectory detection system of the present invention;

[0016] Figure 3 It is a schematic diagram of signal transmission of the shield machine cutter motion trajectory detection system of the present invention;

[0017] Among them, 100, knife ring; 110, knife hub; 120, retaining ring; 130, RFID chip; 140, side blind hole; 200, high temperature resistant material layer; 210, wave absorbing material layer; 220, FRP reinforcement layer; 230, non-magnetic steel material layer; 240, waterproof layer; 300, reader; 310, read-write communication module; 400, terminal processing module; 410, position analysis module; 420, display module. DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] like Figure 3 As shown, the shield machine cutter motion trajectory detection system includes an RFID chip 130, a reader 300, a wireless communication module 310, and a terminal processing module 400, wherein wireless signal transmission is performed between the RFID chip 130 and the reader 300, wired transmission is performed between the reader 300 and the wireless communication module 310, such as transmission using a USB interface, and wireless transmission is performed between the wireless communication module 310 and the terminal processing module 400.

[0022] like Figure 1 As shown, a plurality of roller cutters are arranged on the cutter head of the shield machine, and a side blind hole 140 is provided on the axial end surface of at least one of the cutter ring 100, the cutter hub 110 or the retaining ring 120 on each roller cutter, and the RFID chip 130 is fixedly embedded in the side blind hole and can emit an excitation signal outward; Figure 2 As shown, an FRP reinforcement layer 220, an absorbing material layer 210, and a high temperature resistant material layer 200 are sequentially arranged between the RFID chip and the inner wall of the side blind hole from the inside to the outside. The opening of the side blind hole 140 is also provided with a waterproof layer 240 and a non-magnetic steel material layer 230 to seal the RFID chip in the side blind hole 140. The high temperature resistant material layer 200 can be made of asbestos, refractory ceramics, etc.; the non-magnetic steel material does not have ferromagnetism, which can prevent the shielding of electromagnetic signals. The specific non-magnetic steel material can also be ceramic material. The RFID chip is arranged in the blind hole and a protective layer is provided, which can effectively prevent the mud and sand rolled up when the roller cuts the rock and the rock powder and rock slag ejected from the blade side from sliding and hitting the RFID chip head-on and damaging the RFID chip.

[0023] The reader 300 and the wireless communication module 310 are both fixedly arranged on the rear surface of the cutter disc and can rotate with the cutter disc; the reader 300 receives the excitation signal and converts it into a pulse signal and wirelessly sends the pulse signal to the terminal processing module 400 through the wireless communication module 310; the reader 300 and the wireless communication module 310 can be connected by wire. One reader can read the RFID chip on each hob at the same time, giving full play to the efficiency of the reader.

[0024] The terminal processing module 400 includes a state analysis module 410 and a display module 420. The terminal processing module is arranged in the control room for the convenience of operation by the staff. The state analysis module 410 uses a positioning algorithm to analyze and process the pulse signal and converts it into motion trajectory data; the display module 420 is used to display the analysis results of the state analysis module 410.

[0025] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A shield machine cutter motion trajectory detection system, characterized in that: It comprises an RFID chip (130), a reader (300), a wireless communication module (310), and a terminal processing module (400). The RFID chip (130) is fixedly embedded on the roller cutter of the shield machine and can emit an excitation signal outwardly; The reader (300) and the wireless communication module (310) are both fixedly arranged on the rear surface of the knife disc; The reader (300) receives the excitation signal and converts it into a pulse signal and wirelessly sends the pulse signal to the terminal processing module (400) via a wireless communication module (310); The terminal processing module (400) comprises a state analysis module (410) and a display module (420); the state analysis module (410) is used to analyze and process the pulse signal and convert it into motion trajectory data; the display module (420) is used to display the analysis result of the state analysis module (410); A side blind hole (140) is provided on the axial end surface of at least one of the cutter ring, the cutter hub or the retaining ring on the hob; the RFID chip is embedded in the side blind hole.

2. The shield machine cutter motion trajectory detection system according to claim 1 is characterized in that: An FRP reinforcement layer (220), a wave absorbing material layer (210), and a high temperature resistant material layer (200) are sequentially arranged between the RFID chip and the inner wall of the side blind hole from the inside to the outside.

3. The shield machine cutter motion trajectory detection system according to claim 1 is characterized in that: The opening of the side blind hole (140) is also provided with a waterproof layer and a non-magnetic steel material layer to seal the RFID chip in the side blind hole (140).

4. The shield machine cutter motion trajectory detection system according to claim 1 is characterized in that: The terminal processing module is arranged in the control room.

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