Bridge detection device

Abstract

The utility model relates to a bridge detection device. A vibrating wire strain gauge is firstly installed at a key structure position of a bridge. When the bridge is subjected to external force (such as vehicle passing and wind action), the vibrating wire strain gauge captures tiny deformation of the bridge structure and converts the deformation into an electric signal. The electric signals are sent to the junction box through the first signal transmission line and then are transmitted to the vibrating wire reading instrument through the junction box. The vibrating wire reading instrument further analyzes the signals and converts the signals into specific data of bridge strain for engineers to evaluate and analyze. One end of the first signal transmission line is arranged on the vibrating wire strain gauge, the other end of the first signal transmission line is provided with a first connecting plug, the junction box is provided with a first connecting female seat, and the first connecting plug is detachably connected with the first connecting female seat. And meanwhile, the risk of equipment damage caused by improper connection is also reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge detection, in particular to a bridge detection device. Background Art

[0002] Static load tests can help engineers verify whether the assumptions made in the bridge design are correct. By applying predetermined loads, the test can reveal potential defects or weaknesses in the bridge structure, such as cracks, displacement or unreasonable deformation.

[0003] The existing vibrating-wire strain gauge is widely used in strain testing of bridge structures due to its advantages such as simple installation, durable structure, good stability and strong anti-interference ability.

[0004] Before installation, multiple vibrating-wire strain gauges need to be set on the bridge in sequence, and then connected to the vibrating-wire reader in sequence through signal cables to detect the bridge parameters at the location of each vibrating-wire strain gauge to obtain the test results of the bridge. The following problems may occur during the test:

[0005] 1. Each vibrating-wire strain gauge is connected to the vibrating-wire readout instrument in turn. Tools such as wire cutters and electrical tape are needed to fix the signal cable connected to the vibrating-wire strain gauge to the vibrating-wire readout instrument to realize signal transmission between the vibrating-wire strain gauge and the vibrating-wire readout instrument. Each time a connection is made using tools such as wire cutters and electrical tape, the interface of the vibrating-wire strain gauge or the vibrating-wire readout instrument may be deformed or broken due to excessive force, thereby rendering the vibrating-wire strain gauge or the vibrating-wire readout instrument unusable.

[0006] 2. Connecting each vibrating-wire strain gauge to the vibrating-wire readout instrument in turn will result in low test efficiency. Utility Model Content

[0007] The purpose of the utility model is to provide a bridge detection device to solve the above problems.

[0008] According to one aspect of the utility model, a bridge detection device is provided, comprising:

[0009] Vibrating wire strain gauges, used to inspect bridges;

[0010] A first signal transmission line, one end of which is provided on the vibrating-wire strain gauge and the other end of which has a first connection plug;

[0011] The junction box is provided with a first connecting female socket, and the first connecting plug is detachably connected to the first connecting female socket;

[0012] A vibrating-wire reading instrument is electrically connected to the junction box to read the parameters detected by the vibrating-wire strain gauge.

[0013] In at least one embodiment of the present application, the bridge detection device further includes:

[0014] A switch controller has one end electrically connected to the junction box and the other end electrically connected to the vibrating string reading instrument.

[0015] In at least one embodiment of the present application, the junction box is provided with a second connection plug, and the switch controller is provided with a third connection socket;

[0016] The bridge detection device also includes:

[0017] The second signal transmission line has a second connecting female socket and a third connecting plug at both ends, respectively. The second connecting female socket is detachably connected to the second connecting plug, and the third connecting female socket is detachably connected to the third connecting plug.

[0018] In at least one embodiment of the present application, the junction box is provided with a plurality of the first connecting female sockets, the switch controller has a control area, and the control area has a plurality of control switches;

[0019] Each of the control switches controls one of the first connecting sockets, and each of the first connecting sockets is used to connect one of the first signal transmission lines to control the vibrating-wire strain gauge electrically connected to the first signal transmission line.

[0020] In at least one embodiment of the present application, the number of the control zones is the same as the number of the third female connection sockets, and a single third female connection socket is respectively connected to the control switch of a single control zone;

[0021] Wherein, each of the control switches in the control area is used to control a single vibrating-wire strain gauge electrically connected to the third connecting socket.

[0022] In at least one embodiment of the present application, there are more than two second signal transmission lines, and the two or more second signal transmission lines are connected end to end to form an extended transmission line, one end of the extended transmission line is electrically connected to the third connecting female socket, and the other end is electrically connected to the second connecting plug.

[0023] In at least one embodiment of the present application, the second connecting socket of the previous second signal transmission line is electrically connected to the third connecting plug of the next second signal transmission line to form the extended transmission line.

[0024] In at least one embodiment of the present application, the third connection plug of the second signal transmission line at the head end is electrically connected to the third connection socket, and the second connection socket of the second signal transmission line at the tail end is electrically connected to the second connection plug.

[0025] In at least one embodiment of the present application, the single junction box is connected to three vibrating-wire strain gauges respectively through three first signal transmission lines.

[0026] In at least one embodiment of the present application, the switch controller is provided with a first connection terminal;

[0027] The vibrating wire reading instrument is provided with a second connecting terminal, and the first connecting terminal is electrically connected to the second connecting terminal.

[0028] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0029] In the bridge detection device of this embodiment, the vibrating-string strain gauge is first installed at the key structural position of the bridge. When the bridge is subjected to external forces (such as vehicle passage, wind force, etc.), the vibrating-string strain gauge will capture the tiny deformation of the bridge structure and convert these deformations into electrical signals. These electrical signals are sent to the junction box through the first signal transmission line, and then transmitted to the vibrating-string reader by the junction box. The vibrating-string reader further analyzes these signals and converts them into specific data of the bridge strain for engineers to evaluate and analyze. One end of the first signal transmission line is provided on the vibrating-string strain gauge, and the other end has a first connecting plug. The junction box is provided with a first connecting socket, and the first connecting plug is detachably connected to the first connecting socket. Through the detachable connection design, the device simplifies the installation and maintenance process, making the installation of the vibrating-string strain gauge faster and more convenient, while also reducing the risk of equipment damage caused by improper connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 This is a structural schematic diagram of a bridge detection device according to an embodiment of the utility model;

[0032] Figure 2 for Figure 1 A structural diagram of a partial structure of a bridge detection device;

[0033] Figure 3 for Figure 1 A schematic diagram of the structure of the junction box;

[0034] Figure 4 for Figure 1 Schematic diagram of the switch controller in FIG.

[0035] Among them: 100, bridge detection device;

[0036] 110. Vibrating wire strain gauge;

[0037] 120. A first signal transmission line; 121. A first connection plug;

[0038] 130. Junction box; 131. First female connector; 132. Second connector plug;

[0039] 140. Vibrating wire reading instrument; 141. Second connecting terminal;

[0040] 150, switch controller; 151, third female connector; 150a, control area; 152, control switch; 153, first connection terminal;

[0041] 160. A second signal transmission line; 161. A second connecting female socket; 162. A third connecting plug. DETAILED DESCRIPTION

[0042] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0043] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0045] Please refer to Figure 1-Figure 3 , an embodiment of the utility model provides a bridge detection device 100, comprising:

[0046] Vibrating wire strain gauge 110, used for testing bridges;

[0047] A first signal transmission line 120, one end of which is disposed on the vibrating-wire strain gauge 110, and the other end of which has a first connection plug 121;

[0048] The junction box 130 is provided with a first female connection socket 131, and the first connection plug 121 is detachably connected to the first female connection socket 131;

[0049] The vibrating wire reader 140 is electrically connected to the junction box 130 to read the parameters detected by the vibrating wire strain gauge 110 .

[0050] In this embodiment, the vibrating-wire strain gauge 110 is first installed at the key structural position of the bridge. When the bridge is subjected to external forces (such as vehicle traffic, wind force, etc.), the vibrating-wire strain gauge 110 will capture the tiny deformation of the bridge structure and convert these deformations into electrical signals. These electrical signals are sent to the junction box 130 through the first signal transmission line 120, and then transmitted to the vibrating-wire reader 140 by the junction box 130. The vibrating-wire reader 140 further analyzes these signals and converts them into specific data of the bridge strain for engineers to evaluate and analyze. One end of the first signal transmission line 120 is arranged on the vibrating-wire strain gauge 110, and the other end has a first connecting plug 121. The junction box 130 is provided with a first connecting socket 131. The first connecting plug 121 is detachably connected to the first connecting socket 131. Through the detachable connection design, the device simplifies the installation and maintenance process, making the installation of the vibrating-wire strain gauge 110 faster and more convenient, and also reduces the risk of equipment damage caused by improper connection.

[0051] The first connection plug 121 is inserted into the first connection female socket 131 to achieve electrical connection.

[0052] It should be noted that the vibrating-wire strain gauge 110 is used to monitor the strain of the bridge in real time, and can accurately measure the tiny deformation of the bridge when it is subjected to stress, thereby providing important data for the safety assessment of the bridge.

[0053] One end of the first signal transmission line 120 is connected to the vibrating wire strain gauge 110, and the other end is equipped with a first connection plug 121. This makes the connection between the strain gauge and other parts of the detection system stable and reliable, and also facilitates installation and maintenance. The first connection plug 121 is a self-locking plug.

[0054] The junction box 130 is a center for signal collection and distribution, and is provided with a first female connector 131. The first connector plug 121 of the first signal transmission line 120 is allowed to be detachably connected thereto, thereby simplifying the connection process between the vibrating wire strain gauge 110 and other parts of the system and improving installation efficiency.

[0055] The vibrating wire reader 140 is the data processing and output center of the system. The vibrating wire reader 140 is electrically connected to the junction box 130 and can read and analyze the parameters detected by the vibrating wire strain gauge 110, providing accurate data support for engineers to monitor the status of the bridge in real time.

[0056] In at least one embodiment of the present application, the bridge detection device 100 further includes:

[0057] The switch controller 150 has one end electrically connected to the junction box 130 , and the other end electrically connected to the vibrating wire reading instrument 140 .

[0058] Please refer to Figure 1-Figure 4 In this embodiment, one end of the switch controller 150 is electrically connected to the junction box 130 and the other end is electrically connected to the vibrating wire reader 140. The switch controller 150 is allowed to manage and control the signal transmission between the junction box 130 and the vibrating wire reader 140.

[0059] The bridge strain data detected by the vibrating wire strain gauge 110 is first transmitted to the junction box 130 through the first signal transmission line 120. At this time, the switch controller 150 can select, switch or temporarily disconnect the signals transmitted from the multiple vibrating wire strain gauges 110 as needed to achieve effective management of the data flow.

[0060] The signal is then transmitted to the vibrating wire reader 140 through the switch controller 150. The switch controller 150 can control the transmission sequence and time of the signal during this process to optimize the data processing efficiency of the reader.

[0061] Engineers can flexibly control the working status and data transmission of each strain gauge by operating the switch controller 150. For example, when performing detailed inspection of a specific part, the signal from the strain gauge at that part can be processed preferentially.

[0062] By introducing the switch controller 150, the signal can be managed according to actual needs, thereby avoiding the problem that the reader reduces the processing speed or accuracy due to processing too many signals at the same time.

[0063] The switch controller 150 enables engineers to flexibly control the transmission and processing sequence of signals according to the specific needs of the inspection, thereby conducting more accurate and detailed monitoring of various parts of the bridge.

[0064] In complex bridge inspection projects, the intermediary role of the switch controller 150 can simplify the operation process and improve work efficiency, especially in locations where frequent switching of inspection points is required.

[0065] In at least one embodiment of the present application, the junction box 130 is provided with a second connection plug 132, and the switch controller 150 is provided with a third connection female socket 151;

[0066] The bridge detection device 100 further includes:

[0067] The second signal transmission line 160 has a second female connection socket 161 and a third connection plug 162 at both ends, the second female connection socket 161 and the second connection plug 132 are detachably connected, and the third female connection socket 151 and the third connection plug 162 are detachably connected.

[0068] Please refer to Figure 1-Figure 4 In this embodiment, the second connection plug 132 of the junction box 130 is connected to the third connection socket 151 of the switch controller 150 through the second signal transmission line 160.

[0069] The data collected by the vibrating wire strain gauge 110 is transmitted to the junction box 130 through the first signal transmission line 120, and the junction box 130 sends the signal to the switch controller 150 through the second signal transmission line 160. The switch controller 150 manages the signal according to the preset control logic or the control of the operator, and transmits the processed signal to the vibrating wire reader 140 through the corresponding transmission line.

[0070] The detachable connection not only simplifies the initial installation process, but also makes system maintenance and troubleshooting easier and faster, improving the maintainability of the system.

[0071] The coordinated use of the second signal transmission line 160 and the switch controller 150 provides more possibilities for accurate signal management, thereby improving the efficiency and accuracy of data processing.

[0072] The third female connection socket 151 is provided on the switch controller 150 and is specially designed to be detachably connected to the second connection plug 132 .

[0073] The second signal transmission line 160 is provided with a second female connection socket 161 and a third connection plug 162 at both ends thereof, respectively, for connecting the junction box 130 and the switch controller 150. Its detachable feature simplifies the installation process and improves the convenience of maintenance and troubleshooting.

[0074] The second connection plug 132 is a self-locking plug, and the third connection plug 162 is a self-locking plug. The second connection plug 132 is inserted into the second connection female socket 161 to achieve connection; the third connection plug 162 is inserted into the third connection female socket 151 to achieve connection.

[0075] In at least one embodiment of the present application, the junction box 130 is provided with a plurality of first female connection sockets 131 , the switch controller 150 has a control area 150 a , and the control area 150 a has a plurality of control switches 152 ;

[0076] Each control switch 152 controls a first connecting female socket 131 , and each first connecting female socket 131 is used to connect a first signal transmission line 120 to control the vibrating-wire strain gauge 110 electrically connected to the first signal transmission line 120 .

[0077] In at least one embodiment of the present application, the number of the control zones 150a is the same as the number of the third female connection sockets 151, and a single third female connection socket 151 is respectively connected to a control switch 152 of a single control zone 150a;

[0078] Each control switch 152 of the control area 150 a is used to control a single vibrating-wire strain gauge 110 electrically connected to the third connecting socket 151 .

[0079] Please refer to Figure 1-Figure 4 In this embodiment, a plurality of first connecting female sockets 131 are provided on the junction box 130, and each first connecting female socket 131 is used to connect a first signal transmission line 120. It allows multiple vibrating wire strain gauges 110 to be connected to the same junction box 130 at the same time, thereby realizing simultaneous monitoring of multiple key points of the bridge.

[0080] The switch controller 150 is provided with a control area 150 a, which includes a plurality of control switches 152 . Each control switch 152 is specifically used to control a specific first connecting female socket 131 , thereby achieving precise control of the corresponding vibrating wire strain gauge 110 .

[0081] The number of control areas 150a is the same as the number of third connection sockets 151, and each third connection socket 151 is connected to a specific vibrating wire strain gauge 110 through a separate control switch 152. This ensures independent control of each strain gauge signal, and enhances the flexibility and reliability of the system.

[0082] Each vibrating-wire strain gauge 110 is connected to a corresponding first female connector 131 of the junction box 130 via a first signal transmission line 120. Then, the operating state and signal transmission path of each strain gauge are configured through a control switch 152 on a switch controller 150.

[0083] During the monitoring process, the engineer can flexibly switch or adjust the monitoring status and priority of each vibrating wire strain gauge 110 according to real-time data and monitoring requirements by operating the control switch 152 on the switch controller 150, thereby ensuring that the most important data is processed first at critical moments and improving monitoring efficiency.

[0084] The signal adjusted by the control switch 152 is transmitted to the vibrating wire reader 140 through the switch controller 150 for data collection and analysis. The monitoring strategy can be adjusted at any time as needed to obtain the most accurate bridge status information.

[0085] By providing an independent control switch 152 for each vibrating-wire strain gauge 110 , the monitoring flexibility of the system is improved, allowing engineers to flexibly adjust the monitoring focus and sequence according to actual conditions.

[0086] By precisely controlling the working state of each vibrating-wire strain gauge 110 , the data processing flow can be effectively optimized to ensure that the most important monitoring data is quickly acquired and processed at critical moments, thereby improving the overall data processing efficiency and accuracy.

[0087] By independently controlling the transmission and processing of each signal, when a problem occurs in a vibrating wire strain gauge 110, the problem can be quickly located and isolated to avoid affecting the operation of the entire monitoring system and data accuracy. This not only ensures the reliability of the monitoring data, but also reduces the risk of monitoring interruption due to single point failure.

[0088] In at least one embodiment of the present application, there are more than two second signal transmission lines 160, and the more than two second signal transmission lines 160 are connected end to end to form an extended transmission line, one end of the extended transmission line is electrically connected to the third connecting female socket 151, and the other end is electrically connected to the second connecting plug 132.

[0089] In at least one embodiment of the present application, the second female connection socket 161 of the previous second signal transmission line 160 is electrically connected to the third connection plug 162 of the next second signal transmission line 160 to form an extended transmission line.

[0090] Please refer to Figure 1-Figure 4 In this embodiment, two or more second signal transmission lines 160 are connected end to end to form an extended transmission line. One end of each second signal transmission line 160 is equipped with a second female connector 161 and the other end is equipped with a third connector plug 162, and the connection is achieved through these connection points.

[0091] One end of the extended transmission line is electrically connected to the switch controller 150 through the third female connector 151, and the other end is electrically connected to the junction box 130 through the second connection plug 132. The signal is allowed to pass from the vibrating wire strain gauge 110 through the junction box 130 and the extended transmission line to the switch controller 150, and then from the switch controller 150 to the vibrating wire reader 140.

[0092] According to the specific location and environmental conditions of the monitoring point, a suitable number of second signal transmission lines 160 are selected and connected end to end to meet the required transmission distance. Then, the formed extended transmission line is connected to the junction box 130 and the switch controller 150 respectively.

[0093] The signal detected by the vibrating-wire strain gauge 110 is first transmitted to the junction box 130 , which sends the signal to the switch controller 150 via the extended second signal transmission line 160 , and finally transmitted by the switch controller 150 to the vibrating-wire reader 140 for analysis and processing.

[0094] The extended transmission line significantly improves the flexibility of wiring, which is suitable for occasions where monitoring is required across long distances or complex terrains. This allows the system to flexibly adapt to different engineering requirements and environmental conditions.

[0095] By using the standardized second signal transmission line 160 to form an extended transmission line of a required length, the installation process is simplified, the need for customized transmission lines of special lengths is reduced, the cost is reduced, and the installation speed is also accelerated.

[0096] In at least one embodiment of the present application, the third connection plug 162 of the second signal transmission line 160 at the head end is electrically connected to the third connection socket 151 , and the second connection socket 161 of the second signal transmission line 160 at the tail end is electrically connected to the second connection plug 132 .

[0097] Please refer to Figure 1-Figure 4 In this embodiment, the second signal transmission line 160 at the head end is connected to the third connecting female socket 151 on the switch controller 150 through its third connecting plug 162, and the second signal transmission line 160 at the tail end is connected to the second connecting plug 132 on the junction box 130 through its second connecting female socket 161 to optimize the signal transmission path.

[0098] Through a simple plug-in and pull-out operation, a plurality of second signal transmission lines 160 are combined into an extended transmission line that meets a specific length requirement.

[0099] When installing the bridge detection system, an appropriate number of second signal transmission lines 160 are selected according to the actual distance and layout requirements, and they are connected end to end through their preset connecting plugs and female sockets to form an extended transmission line.

[0100] The system's wiring adaptability and flexibility have been improved, making it easy to cope with complex on-site environments and different installation requirements.

[0101] In at least one embodiment of the present application, a single junction box 130 is connected to three vibrating-wire strain gauges 110 respectively through three first signal transmission lines 120 .

[0102] Please refer to Figure 1-Figure 4 In this embodiment, the junction box 130 is used as a central node and is directly connected to three different vibrating wire strain gauges 110 through three first signal transmission lines 120, which simplifies the centralized processing and management of signals.

[0103] By managing three vibrating-wire strain gauges 110 through a single junction box 130, simultaneous monitoring of different parts of the bridge is achieved, thereby improving the scope and efficiency of data collection.

[0104] Three vibrating-wire strain gauges 110 are installed at key structural positions of the bridge, and then the strain gauges are connected to the same junction box 130 through three first signal transmission lines 120 respectively.

[0105] When the bridge is subjected to load, each vibrating wire strain gauge 110 will capture the corresponding strain data and send it to the junction box 130 through the first signal transmission line 120. After the junction box 130 collects these data, it sends them to the vibrating wire reader 140 through a preset path for analysis and processing.

[0106] It allows data to be collected from multiple key points simultaneously, significantly improving the efficiency and coverage of monitoring.

[0107] By reducing the number of required junction boxes 130, the structure of the entire system is simplified, the system complexity is reduced, and the cost of installation and maintenance is also reduced.

[0108] In at least one embodiment of the present application, the switch controller 150 is provided with a first connection terminal 153;

[0109] The vibrating wire reading instrument 140 is provided with a second connection terminal 141 , and the first connection terminal 153 is electrically connected to the second connection terminal 141 .

[0110] Please refer to Figure 1-Figure 4 In this embodiment, the first connection terminal 153 on the switch controller 150 and the second connection terminal 141 on the vibrating wire reader 140 are used to realize a direct electrical connection between the two devices. This simplifies the signal transmission path, reduces the intermediate connection points, and helps to improve the efficiency and stability of signal transmission.

[0111] During installation, the first connection terminal 153 on the switch controller 150 is directly connected to the second connection terminal 141 on the vibrating wire reader 140 through an appropriate cable, thereby ensuring direct transmission of signals from the switch controller 150 to the vibrating wire reader 140 .

[0112] When the vibrating wire strain gauge 110 detects the strain data of the bridge, the data is first transmitted to the junction box 130, and then processed and managed by the switch controller 150. The signal processed by the switch controller 150 is directly transmitted to the vibrating wire reader 140 through the first connection terminal 153 and the second connection terminal 141 for final data analysis and interpretation.

[0113] By reducing the intermediate links in the signal transmission path, the direct electrical connection significantly improves the transmission efficiency and speed of the signal, ensuring that the data can be transmitted to the vibrating wire reader 140 quickly and accurately.

[0114] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent application. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A bridge detection device, characterized in that: include: Vibrating wire strain gauges, used to inspect bridges; A first signal transmission line, one end of which is provided on the vibrating-wire strain gauge and the other end of which has a first connection plug; The junction box is provided with a first connecting female socket, and the first connecting plug is detachably connected to the first connecting female socket; A vibrating-wire reading instrument is electrically connected to the junction box to read the parameters detected by the vibrating-wire strain gauge.

2. The bridge detection device according to claim 1, characterized in that: The bridge detection device also includes: A switch controller has one end electrically connected to the junction box and the other end electrically connected to the vibrating string reading instrument.

3. The bridge detection device according to claim 2, characterized in that: The junction box is provided with a second connection plug, and the switch controller is provided with a third connection socket; The bridge detection device also includes: The second signal transmission line has a second connecting female socket and a third connecting plug at both ends, respectively. The second connecting female socket is detachably connected to the second connecting plug, and the third connecting female socket is detachably connected to the third connecting plug.

4. The bridge detection device according to claim 3, characterized in that: The junction box is provided with a plurality of the first connecting female sockets, the switch controller is provided with a control area, and the control area is provided with a plurality of control switches; Each of the control switches controls one of the first connecting sockets, and each of the first connecting sockets is used to connect one of the first signal transmission lines to control the vibrating-wire strain gauge electrically connected to the first signal transmission line.

5. The bridge detection device according to claim 4, characterized in that: The number of the control zones is the same as the number of the third female connection sockets, and a single third female connection socket is respectively connected to the control switch of a single control zone; Wherein, each of the control switches in the control area is used to control a single vibrating-wire strain gauge electrically connected to the third connecting socket.

6. The bridge detection device according to claim 3, characterized in that: There are more than two second signal transmission lines, and the two or more second signal transmission lines are connected end to end to form an extended transmission line, one end of the extended transmission line is electrically connected to the third connecting female socket, and the other end is electrically connected to the second connecting plug.

7. The bridge detection device according to claim 6, characterized in that: The second connecting female socket of the preceding second signal transmission line is electrically connected to the third connecting plug of the succeeding second signal transmission line to form the extended transmission line.

8. The bridge detection device according to claim 7, characterized in that: The third connection plug of the second signal transmission line at the head end is electrically connected to the third connection female socket, and the second connection female socket of the second signal transmission line at the tail end is electrically connected to the second connection plug.

9. The bridge detection device according to claim 1, characterized in that: The single junction box is connected to the three vibrating-wire strain gauges respectively through the three first signal transmission lines.

10. The bridge detection device according to claim 2, characterized in that: The switch controller is provided with a first connecting terminal; The vibrating wire reading instrument is provided with a second connecting terminal, and the first connecting terminal is electrically connected to the second connecting terminal.

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