Safety step pitch measuring system for construction in tunnel

Abstract

The embodiment of the utility model relates to an in-tunnel construction safety step pitch measuring system, which comprises a first vision distance measuring module and a surrounding rock grade measuring module, the first vision distance measuring module is arranged on a second lining trolley, and the surrounding rock grade measuring module is arranged on an excavation trolley. The first visual ranging module comprises a first image acquisition part, a first image processing unit and a first alarm unit. The first image acquisition part acquires first image information of a tunnel face and acquires a first actual step pitch between the second lining trolley and the tunnel face according to the first image information. The surrounding rock grade measurement module obtains a first safety step pitch threshold value according to the surrounding rock image, so that the surrounding rock grade and the first safety step pitch threshold value can be automatically set, and a first actual step pitch and the first safety step pitch threshold value can be automatically judged; when the first actual step pitch is larger than the first safety step pitch threshold value, the first alarm unit is controlled to give an alarm, so that a constructor is reminded to handle in time, and the automation degree of the whole measurement process is high.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to the field of tunnel construction technology, especially relates to a tunnel internal construction safety step distance measuring system. BACKGROUND

[0002] In traffic construction, the construction of a tunnel is a relatively dangerous part. In the tunnel excavation process, dangerous situations such as surrounding rock deformation instability collapse, rock burst, tunnel gushing water, gushing mud, mud flow and the like are prone to occur due to different geological environments. Therefore, in the tunnel excavation process, it is necessary to determine the safety step distance threshold between the secondary lining trolley and the waterproof trolley according to the surrounding rock grade, and it is necessary to detect the actual distance between the secondary lining trolley and the waterproof trolley in real time to determine whether it is within the safety step distance threshold.

[0003] At present, the actual distance is usually detected by a laser ranging, microwave ranging and ultrasonic wave step distance measuring instrument. However, the safety step distance threshold needs to be manually preset for the three ranging methods, so full automation cannot be achieved. UTILITY MODEL CONTENT

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the embodiment of the utility model provides a tunnel internal construction safety step distance measuring system.

[0005] The embodiment of the utility model provides a tunnel internal construction safety step distance measuring system, at least comprising a first visual distance measuring module and a surrounding rock grade measuring module, the first visual distance measuring module is arranged on a secondary lining trolley in a tunnel, and the surrounding rock grade measuring module is arranged on an excavation trolley in the tunnel.

[0006] The surrounding rock grade measuring module is used for acquiring a surrounding rock image in the tunnel, acquiring a surrounding rock grade according to the surrounding rock image, and acquiring a first safety step distance threshold between the secondary lining trolley and a tunnel face according to the surrounding rock grade.

[0007] The first visual distance measuring module comprises a first image acquisition component, a first image processing unit and a first alarm unit; the first image acquisition component is used for acquiring first image information of the tunnel face, the first image processing unit is in communication connection with the first image acquisition component, and is used for acquiring a first actual step distance between the secondary lining trolley and the tunnel face according to the first image information.

[0008] The first alarm unit is in communication connection with the first image processing unit, and is used for issuing an alarm when the first actual step distance is greater than the first safety step distance threshold.

[0009] In some embodiments, the tunnel internal construction safety step distance measuring system comprises a second visual distance measuring module.

[0010] The second visual distance measuring module is arranged on a waterproof trolley in the tunnel, and comprises a second image acquisition component, a second image processing unit and a second alarm unit.

[0011] The surrounding rock grade measuring module is configured to obtain a second safe step distance threshold between the waterproof trolley and the tunnel face according to the surrounding rock grade. The second image acquisition component is configured to obtain second image information of the tunnel face. The second image processing unit is in communication connection with the second image acquisition component and is configured to obtain a second actual step distance between the waterproof trolley and the tunnel face according to the second image information.

[0012] The second alarm unit is in communication connection with the second image processing unit and is configured to issue an alarm when the second actual step distance is greater than the second safe step distance threshold.

[0013] In some embodiments, the surrounding rock grade measuring module comprises a third image acquisition component and a third image processing unit.

[0014] The third image acquisition component is configured to obtain a surrounding rock image in the tunnel. The third image processing unit is in communication connection with the third image acquisition component and is configured to obtain a surrounding rock grade according to the surrounding rock image, and obtain a first safe step distance threshold between the secondary lining trolley and the tunnel face and a second safe step distance threshold between the waterproof trolley and the tunnel face according to the surrounding rock grade.

[0015] In some embodiments, the first visual distance measuring module comprises a first intercom module, the second visual distance measuring module comprises a second intercom module, and the surrounding rock grade measuring module comprises a third intercom module.

[0016] The first intercom module is in communication connection with the second intercom module, the second intercom module is in communication connection with the third intercom module, and the first intercom module is in communication connection with the third intercom module.

[0017] In some embodiments, the first visual distance measuring module comprises a first pan-tilt head, the first pan-tilt head is rotatably arranged on the secondary lining trolley, and the first image acquisition component is arranged on the first pan-tilt head.

[0018] And / or, the second visual distance measuring module comprises a second pan-tilt head, the second pan-tilt head is rotatably arranged on the waterproof trolley, and the second image acquisition component is arranged on the second pan-tilt head.

[0019] And / or, the surrounding rock grade measuring module comprises a third pan-tilt head, the third pan-tilt head is rotatably arranged on the excavation trolley, and the third image acquisition component is arranged on the third pan-tilt head.

[0020] In some embodiments, the first image acquisition component, the second image acquisition component and the third image acquisition component are all monocular vision wireless cameras.

[0021] In some embodiments, the tunnel construction safety step distance measuring system further comprises a host computer, a background server arranged on the host computer, and a background alarm connected in communication with the background server.

[0022] The first visual distance measuring module, the second visual distance measuring module and the surrounding rock grade measuring module are all connected in communication with the background server, and the background alarm is configured to send an alarm when at least one of the first alarm unit and the second alarm unit is activated.

[0023] In some embodiments, an exchange is arranged at a tunnel portal of the tunnel, the background server is connected in communication with the exchange via a transmission network, the first visual distance measuring module, the second visual distance measuring module and the surrounding rock grade measuring module are all configured with wireless base stations, and the exchange is connected in communication with each of the wireless base stations.

[0024] In some embodiments, a display screen is further arranged on the host computer, the display screen is connected in communication with the background alarm, and the display screen is configured to receive and display alarm information of the background alarm.

[0025] In some embodiments, the background alarm is any one of an audio alarm and a light alarm.

[0026] Compared with the prior art, the technical scheme provided by the embodiments of the present application has the following advantages:

[0027] The utility model embodiment provides a tunnel construction safety step distance measurement system, at least including first vision distance measurement module and surrounding rock grade measurement module, first vision distance measurement module sets up on the second lining trolley in the tunnel, and surrounding rock grade measurement module sets up on the excavation trolley. Surrounding rock grade measurement module is used for obtaining the surrounding rock image in the tunnel, obtains the surrounding rock grade according to the surrounding rock image, and obtains the first safety step distance threshold value between the second lining trolley and the tunnel's working face according to the surrounding rock grade. First vision distance measurement module includes first image acquisition component, first image processing unit and first alarm unit, and first image acquisition component is used for obtaining the first image information of working face. First image processing unit obtains the first actual step distance between the second lining trolley and working face according to first image information, so that can compare and analyze according to first safety step distance threshold value and first actual step distance to judge whether control first alarm unit sends alarm. That is, the tunnel construction safety step distance measurement system of the utility model embodiment can realize the automation setting of surrounding rock grade and first safety step distance threshold value and can automatically determine first actual step distance and first safety step distance threshold value, so as to control first alarm unit to send alarm when first actual step distance is greater than first safety step distance threshold value, thereby reminding construction personnel to handle in time, and the automation degree of whole measurement process is higher. BRIEF DESCRIPTION OF DRAWINGS

[0028] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments that are in accordance with the principles of the present embodiments and together with the description, serve to explain the principles of the present embodiments.

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present embodiments or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows, and obviously, other drawings can also be obtained by those skilled in the art without any creative labor.

[0030] Figure 1 The structural schematic diagram of the tunnel construction safety step distance measurement system of the present embodiments is shown.

[0031] Figure 2 The structural schematic diagram of the first vision distance measurement module of the tunnel construction safety step distance measurement system of the present embodiments is shown.

[0032] Figure 3 The structural schematic diagram of the second vision distance measurement module of the tunnel construction safety step distance measurement system of the present embodiments is shown.

[0033] Figure 4 The structural schematic diagram of the surrounding rock grade measurement module of the tunnel construction safety step distance measurement system of the present embodiments is shown.

[0034] Wherein, 1, first visual ranging module; 11, first image acquisition component; 12, first image processing unit; 13, first alarm unit; 2, second lining trolley; 3, waterproof trolley; 4, second visual ranging module; 41, second image acquisition component; 42, second image processing unit; 43, second alarm unit; 5, excavation trolley; 6, surrounding rock grade measurement module; 61, third image acquisition component; 62, third image processing unit; 71, host computer; 72, background server; 73, switch; 74, transmission network; 75, wireless base station; 76, display screen; 8, working face. DETAILED DESCRIPTION

[0035] In order to enable the above-mentioned purposes, features and advantages of the embodiments of the present application to be more clearly understood, the schemes of the embodiments of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0036] In the following description, many specific details are set forth in order to provide a thorough understanding of the embodiments of the present application, but the embodiments of the present application can also be implemented in other manners different from those described herein; obviously, the embodiments described in the specification are only a part of the embodiments of the present application, and not all the embodiments.

[0037] Reference Figures 1 to 4 As shown in the figure, the present embodiment provides a tunnel construction safety step distance measurement system, which at least comprises a first visual ranging module 1 and a surrounding rock grade measurement module 6, the first visual ranging module 1 is arranged on a second lining trolley 2 in the tunnel, and the surrounding rock grade measurement module 6 is arranged on an excavation trolley 5 in the tunnel.

[0038] The surrounding rock grade measurement module 6 is used to acquire a surrounding rock image in the tunnel, to acquire a surrounding rock grade according to the surrounding rock image, and to acquire a first safety step distance threshold value between the second lining trolley 2 and a working face 8 of the tunnel according to the surrounding rock grade.

[0039] The first visual ranging module 1 comprises a first image acquisition component 11, a first image processing unit 12 and a first alarm unit 13.

[0040] The first image acquisition component 11 is used to acquire first image information of the working face 8; the first image processing unit 12 is in communication connection with the first image acquisition component 11, and is used to acquire a first actual step distance between the second lining trolley 2 and the working face 8 according to the first image information.

[0041] The first alarm unit 13 is in communication connection with the first image processing unit 12, and is used to issue an alarm when the first actual step distance is greater than the first safety step distance threshold value.

[0042] In a specific implementation, first, the surrounding rock image in the tunnel is acquired by the surrounding rock grade measurement module 6, then the recognition features of the surrounding rock image are extracted, and the surrounding rock stratum and joint of the tunnel face 8 are judged to determine the surrounding rock type and the fragmentation degree, and then the surrounding rock grade of the tunnel face 8 is output, and finally the first safety step distance threshold between the secondary lining trolley 2 and the tunnel face 8 is determined according to the surrounding rock grade. At the same time, the first image acquisition component 11 acquires the first image information of the tunnel face 8, and the first image processing unit 12 calculates the first actual step distance between the secondary lining trolley 2 and the tunnel face 8 by algorithm calculation on the first image information. Then, the first image processing unit 12 compares and analyzes the first actual step distance and the first safety step distance threshold, if the first actual step distance is greater than the first safety step distance threshold, the first alarm unit 13 is controlled to issue an alarm, so as to facilitate the construction personnel to process in time. If the first actual step distance is greater than the first safety step distance threshold, the first alarm unit 13 will not issue an alarm.

[0043] That is, the first visual distance measurement module 1 and the surrounding rock grade measurement module 6 of the embodiment can combine the determination of the surrounding rock grade, the setting of the first safety step distance threshold and the determination of the first actual step distance through the surrounding rock grade measurement module 6, the first image acquisition component 11 and the first image processing unit 12, without manually setting the surrounding rock grade, so as to improve the automatic measurement level of the whole tunnel construction safety step distance measurement system, and improve the construction safety, and compared with the existing safety step distance measurement method, the tunnel construction safety step distance measurement system of the embodiment is not affected by weather dust, has no laser light source, and will not stimulate the eyes of the construction personnel.

[0044] For example, the first image acquisition component 11 can be a monocular visual wireless camera. In addition, the first alarm unit 13 can be a sound alarm or a light alarm or a sound and light alarm.

[0045] The embodiment provides a tunnel construction safety step distance measuring system, which comprises at least a first visual distance measuring module 1 and a surrounding rock grade measuring module 6. The first visual distance measuring module 1 is arranged on a secondary lining trolley 2 in the tunnel, and the surrounding rock grade measuring module 6 is arranged on an excavation trolley 5. The surrounding rock grade measuring module 6 is used to acquire a surrounding rock image in the tunnel, acquire a surrounding rock grade according to the surrounding rock image, and acquire a first safety step distance threshold value between the secondary lining trolley 2 and a tunnel face 8 according to the surrounding rock grade. The first visual distance measuring module 1 comprises a first image acquisition component 11, a first image processing unit 12 and a first alarm unit 13. The first image acquisition component 11 acquires first image information of the tunnel face 8. The first image processing unit 12 acquires a first actual step distance between the secondary lining trolley 2 and the tunnel face 8 according to the first image information, so that the first safety step distance threshold value and the first actual step distance can be compared and analyzed to determine whether the first alarm unit 13 is controlled to issue an alarm. That is, the tunnel construction safety step distance measuring system can realize automatic setting of the surrounding rock grade and the first safety step distance threshold value, and can automatically determine the first actual step distance and the first safety step distance threshold value, so that the first alarm unit 13 is controlled to issue an alarm when the first actual step distance is greater than the first safety step distance threshold value, thereby reminding the construction personnel to handle in time, and the automation degree of the whole measuring process is high.

[0046] Referring to Figure 1 and Figure 3 In some embodiments, the tunnel construction safety step distance measuring system further comprises a second visual distance measuring module 4.

[0047] The second visual distance measuring module 4 is arranged on a waterproof trolley 3 in the tunnel. The second visual distance measuring module 4 comprises a second image acquisition component 41, a second image processing unit 42 and a second alarm unit 43. The surrounding rock grade measuring module 6 is used to acquire a second safety step distance threshold value between the waterproof trolley 3 and the tunnel face 8 according to the surrounding rock grade.

[0048] The second image acquisition component 41 is used to acquire second image information of the tunnel face 8. The second image processing unit 42 is in communication connection with the second image acquisition component 41 and is used to acquire a second actual step distance between the waterproof trolley 3 and the tunnel face 8 according to the second image information.

[0049] The second alarm unit 43 is in communication connection with the second image processing unit 42 and is used to issue an alarm when the second actual step distance is greater than the second safety step distance threshold value.

[0050] In a specific implementation, the second image acquisition component 41 acquires second image information of the working face 8, and the second image processing unit 42 performs algorithmic calculation on the second image information to obtain a second actual step distance between the waterproof trolley 3 and the working face 8. Then, the second image processing unit 42 compares and analyzes the second actual step distance with the second safety step distance threshold value, and if the second actual step distance is greater than the second safety step distance threshold value, the second alarm unit 43 is controlled to issue an alarm, so as to facilitate the construction personnel to handle in time. If the second actual step distance is greater than the second safety step distance threshold value, the second alarm unit 43 will not issue an alarm.

[0051] That is, the second visual distance measurement module 4 and the surrounding rock grade measurement module 6 of the embodiment can combine the determination of the surrounding rock grade, the setting of the second safety step distance threshold value, and the determination of the second actual step distance through the second image acquisition component 41, the second image processing unit 42, and the surrounding rock grade measurement module 6, without manually setting the surrounding rock grade, so as to improve the automatic measurement level of the whole tunnel construction safety step distance measurement system.

[0052] For example, the second image acquisition component 41 can be a monocular visual wireless camera. In addition, the second alarm unit 43 can be a sound alarm or a light alarm or a sound and light alarm.

[0053] Referring to Figure 1 and Figure 4 In some embodiments, the surrounding rock grade measurement module 6 includes a third image acquisition component 61 and a third image processing unit 62.

[0054] The third image acquisition component 61 is used to acquire surrounding rock images in the tunnel, and the third image processing unit 62 is in communication connection with the third image acquisition component 61, and is used to acquire a surrounding rock grade according to the surrounding rock images, and acquire a first safety step distance threshold value between the secondary lining trolley 2 and the working face 8 and a second safety step distance threshold value between the waterproof trolley 3 and the working face 8 according to the surrounding rock grade.

[0055] For example, the third image acquisition component 61 can be a monocular visual wireless camera.

[0056] Referring to Figure 1 In some embodiments, the first visual distance measurement module 1 includes a first intercom module, the second visual distance measurement module 4 includes a second intercom module, and the surrounding rock grade measurement module 6 includes a third intercom module.

[0057] The first intercom module and the second intercom module, the second intercom module and the third intercom module, and the first intercom module and the third intercom module are in communication connection, so as to facilitate the construction personnel to communicate through the intercom modules on site.

[0058] Exemplarily, the first intercom module, the second intercom module and the third intercom module can each be an intercom.

[0059] In some embodiments, the first visual ranging module 1 comprises a first holder, the first holder being rotatably arranged on the second support trolley 2, and the first image acquisition component 11 being arranged on the first holder, so as to facilitate rotation of the first image acquisition component 11 for image shooting.

[0060] Correspondingly, the second visual ranging module 4 comprises a second holder, the second holder being rotatably arranged on the waterproof trolley 3, and the second image acquisition component 41 being arranged on the second holder, so as to facilitate rotation of the second image acquisition component 41 for image shooting.

[0061] Correspondingly, the surrounding rock grade measuring module 6 comprises a third holder, the third holder being rotatably arranged on the excavation trolley 5, and the third image acquisition component 61 being arranged on the third holder, so as to facilitate rotation of the third image acquisition component 61 for image shooting.

[0062] Referring to Figure 1 In some embodiments, the tunnel construction safety step measuring system further comprises a host computer 71, a background server 72 arranged on the host computer 71, and a background alarm connected in communication with the background server 72.

[0063] The first visual ranging module 1, the second visual ranging module 4 and the surrounding rock grade measuring module 6 are all connected in communication with the background server 72, and the background alarm is configured to control the background alarm to issue an alarm when at least one of the first alarm unit 13 and the second alarm unit 43 is activated.

[0064] That is, when an alarm is issued by either of the first alarm unit 13 and the second alarm unit 43, the background alarm can be controlled to issue an alarm at the same time to timely remind the construction personnel.

[0065] Referring to Figure 1 In some embodiments, an exchange 73 is arranged at the tunnel portal of the tunnel, the background server 72 is connected in communication with the exchange 73 through a transmission network 74, and each of the first visual ranging module 1, the second visual ranging module 4 and the surrounding rock grade measuring module 6 is configured with a wireless base station 75, and the exchange 73 is connected in communication with each wireless base station 75, so as to realize wireless communication of the entire measuring system.

[0066] Referring to Figure 1 In some embodiments, the host computer 71 is further provided with a display screen 76, the display screen 76 being connected in communication with the background alarm, and the display screen 76 being configured to receive and display alarm information of the background alarm, so as to prompt the construction personnel to timely handle the alarm information.

[0067] Exemplary, the background alarm is any one of an audio alarm, a light alarm.

[0068] In addition, the tunnel construction safety step distance measuring system can be used in tunnel construction scenes, and can also be used in other underground engineering and bridge engineering application scenes, and the application scene is relatively wide.

[0069] Exemplary, in the current specification, the relationship between the distance requirement of the inverted arch from the working face 8 and the surrounding rock grade is as follows:

[0070] 1. When the surrounding rock grade is I, II or III, the distance between the inverted arch and the working face should not be greater than 90m;

[0071] 2. When the surrounding rock grade is IV, the distance between the inverted arch and the working face should not be greater than 50m;

[0072] 3. When the surrounding rock grade is V or VI, the distance between the inverted arch and the working face should not be greater than 40m.

[0073] The relationship between the distance requirement of the secondary lining from the working face 8 and the surrounding rock grade is as follows:

[0074] 1. When the surrounding rock grade is I or II, the distance between the secondary lining and the working face should not be greater than 200m;

[0075] 2. When the surrounding rock grade is III, the distance between the inverted arch and the working face should not be greater than 120m;

[0076] 3. When the surrounding rock grade is IV or above, the distance between the inverted arch and the working face should not be greater than 90m or the design requirement.

[0077] It should be noted that in this document, relational terms such as“first” and“second” and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms“comprises,”“comprising,” or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without limitation, an element preceded by“comprises a” does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0078] The above describes only the specific implementation of the present embodiment, so that those skilled in the art can understand or implement the present embodiment. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present embodiment. Therefore, the present embodiment will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features of the present embodiment.

Claims

1. A system for measuring safe step distance during tunnel construction, characterized in that, It includes at least a first visual ranging module (1) and a surrounding rock grade measurement module (6). The first visual ranging module (1) is installed on the secondary lining trolley (2) inside the tunnel, and the surrounding rock grade measurement module (6) is installed on the excavation trolley (5) inside the tunnel. The surrounding rock grade measurement module (6) includes a third image acquisition component (61) and a third image processing unit (62). The third image acquisition component (61) is used to acquire images of the surrounding rock inside the tunnel. The third image processing unit (62) is communicatively connected to the third image acquisition component (61) and is used to acquire the surrounding rock grade based on the surrounding rock image, and to acquire the first safe step distance threshold between the secondary lining trolley (2) and the tunnel face (8) based on the surrounding rock grade. The first visual ranging module (1) includes a first image acquisition component (11), a first image processing unit (12), and a first alarm unit (13); the first image acquisition component (11) is used to acquire first image information of the working face (8), and the first image processing unit (12) is communicatively connected to the first image acquisition component (11) and is used to acquire the first actual step distance between the secondary lining trolley (2) and the working face (8) according to the first image information; The first alarm unit (13) is communicatively connected to the first image processing unit (12) and is used to issue an alarm when the first actual step distance is greater than the first safe step distance threshold.

2. The tunnel construction safety step distance measurement system according to claim 1, characterized in that, The tunnel construction safety step distance measurement system includes a second visual distance measurement module (4). The second visual ranging module (4) is installed on the waterproof trolley (3) inside the tunnel. The second visual ranging module (4) includes a second image acquisition component (41), a second image processing unit (42), and a second alarm unit (43). The surrounding rock grade measurement module (6) is used to obtain the second safe step distance threshold between the waterproof trolley (3) and the working face (8); the second image acquisition component (41) is used to obtain the second image information of the working face (8); the second image processing unit (42) is communicatively connected to the second image acquisition component (41) and is used to obtain the second actual step distance between the waterproof trolley (3) and the working face (8); The second alarm unit (43) is communicatively connected to the second image processing unit (42) and is used to issue an alarm when the second actual step distance is greater than the second safe step distance threshold.

3. The tunnel construction safety step distance measurement system according to claim 2, characterized in that, The third image processing unit (62) obtains the second safe step distance threshold between the waterproof trolley (3) and the working face (8) according to the surrounding rock level.

4. The tunnel construction safety step distance measurement system according to claim 3, characterized in that, The first visual ranging module (1) includes a first intercom module, the second visual ranging module (4) includes a second intercom module, and the surrounding rock grade measurement module (6) includes a third intercom module; The first intercom module and the second intercom module, the second intercom module and the third intercom module, and the first intercom module and the third intercom module are connected for communication.

5. The tunnel construction safety step distance measurement system according to claim 3, characterized in that, The first visual ranging module (1) includes a first gimbal, which is rotatably mounted on the second liner trolley (2), and the first image acquisition component (11) is mounted on the first gimbal. And / or, the second visual ranging module (4) includes a second gimbal, which is rotatably mounted on the waterproof trolley (3), and the second image acquisition component (41) is mounted on the second gimbal; And / or, the surrounding rock grade measurement module (6) includes a third gimbal, which is rotatably mounted on the excavation trolley (5), and the third image acquisition component (61) is mounted on the third gimbal.

6. The tunnel construction safety step distance measurement system according to claim 3, characterized in that, The first image acquisition component (11), the second image acquisition component (41) and the third image acquisition component (61) are all monocular vision wireless cameras.

7. The tunnel construction safety step distance measurement system according to claim 3, characterized in that, The tunnel construction safety step distance measurement system also includes a host (71), a back-end server (72) installed on the host (71), and a back-end alarm that is communicatively connected to the back-end server (72); The first visual ranging module (1), the second visual ranging module (4) and the surrounding rock grade measurement module (6) are all connected to the background server (72). The background alarm is used to control the background alarm to issue an alarm when at least one of the first alarm unit (13) and the second alarm unit (43) is activated.

8. The tunnel construction safety step distance measurement system according to claim 7, characterized in that, A switch (73) is installed at the tunnel entrance of the tunnel. The back-end server (72) is connected to the switch (73) through a transmission network (74). The first visual ranging module (1), the second visual ranging module (4) and the surrounding rock grade measurement module (6) are all equipped with wireless base stations (75). The switch (73) is connected to each of the wireless base stations (75).

9. The tunnel construction safety step distance measurement system according to claim 7, characterized in that, The host (71) is also equipped with a display screen (76), which is communicatively connected to the background alarm device. The display screen (76) is used to receive and display the alarm information of the background alarm device.

10. The tunnel construction safety step distance measurement system according to claim 7, characterized in that, The background alarm device can be either an audio alarm or a light alarm.

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