A sensor detection device commonly used in a shield machine

Abstract

The utility model discloses a kind of commonly used sensor detection devices of shield machine, belong to shield machine sensor detection technical field, the device includes test bench shell, test bench shell is equipped with test bench bottom plate, test bench shell top is equipped with test bench panel, and installation hole and sensor socket connecting plate are equipped on test bench panel, and PLC and extension module are equipped on test bench bottom plate;External commercial power is connected by double-throw power switch QF, emergency stop switch and PLC;The input end connection of PLC and DC / AC module, the output end of DC / AC module and display screen, extension module connection, extension module and sensor socket connecting plate communication connection;Extension module is connected with PLC by bus cable.The utility model compact structure, small and exquisite, greatly improve the detection efficiency.Can adapt and detect the vast majority of types of analog and digital sensor on shield machine, reduce equipment procurement and maintenance cost, and high safety and reliability.

Description

Technical Field

[0001] This utility model relates to shield machine sensor detection technology, specifically a commonly used sensor detection device for shield machines. Background Technology

[0002] A tunnel boring machine (TBM) is a type of tunnel boring machine that uses the shield tunneling method, which differs from open-cut construction. As a core piece of equipment in underground engineering, the advantages of TBMs are mainly reflected in construction efficiency, environmental impact, and safety. Specifically, TBMs can increase the efficiency of subway tunneling by 8-10 times, with a daily tunneling speed of over 12 meters, significantly shortening the construction period; TBM construction does not require large-scale demolition, does not obstruct surface traffic, has low noise, and no risk of settlement, minimizing the impact on residents' lives; compared to the traditional drill and blast method, TBMs cut through soil and rock with a cutterhead, generating thrust more than 20 times that of a rocket, and are equipped with a support system to cope with complex geological challenges.

[0003] Currently, the development of tunnel boring machine (TBM) equipment is a trend, with electrical equipment playing a crucial role. The development of TBMs is a market trend, and various sensors play a vital role. When TBMs are in operation, different types of sensors are needed to collect various data, including motor current, mud chamber pressure, oil and electrical equipment temperature, and cylinder extension / retraction length, etc., to determine the real-time status of the equipment and prevent abnormal situations.

[0004] The current shield tunneling machine's sensor performance deficiencies are not visible to the naked eye, affecting the safety of the shield tunneling machine's operation. Utility Model Content

[0005] The purpose of this utility model is to provide a commonly used sensor detection device for tunnel boring machines (TBMs) to address the problem that sensor performance cannot be judged by the naked eye during TBM operation.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A commonly used sensor detection device for tunnel boring machines includes a test bench housing, a test bench base plate inside the test bench housing, and a test bench panel at the top of the test bench housing. The test bench panel has mounting holes and a sensor connector plate. A display screen is installed in the mounting holes. The sensor connector plate is used to connect the tunnel boring machine's sensor to be tested. A PLC and an expansion module are mounted on the test bench base plate. The live wire of the external mains power is connected to two sets of input terminals of a double-throw power switch QF. One output terminal of the double-throw power switch QF connected to the live wire of the external mains power is connected to one end of an emergency stop switch. The other end of the emergency stop switch is connected to the PLC. The other output terminal of the double-throw power switch QF connected to the neutral wire of the external mains power is connected to the PLC. The PLC is connected to the input terminals of a DC / AC module. The output terminals of the DC / AC module are connected to the display screen and the expansion module. The expansion module is communicatively connected to the sensor connector plate. The expansion module is connected to the PLC via a bus cable.

[0007] As a further embodiment of this utility model, the expansion module includes an analog output module AO, an analog input module AI, a digital input / output module DI / DO, a high-speed counter module HSC, or a communication module.

[0008] As a further embodiment of this utility model: the signal output terminal and input terminal of the expansion module are connected to the corresponding pins of the sensor socket connection board on the panel via internal cables.

[0009] As a further embodiment of this utility model: fuses FU1 and FU2 are respectively provided on the two sets of connection lines between the double-throw power switch QF and the PLC.

[0010] As a further embodiment of this invention, the double-throw power switch QF is also mounted on the test bench panel.

[0011] As a further embodiment of this invention, the emergency stop switch is installed on the test bench panel.

[0012] As a further embodiment of this utility model, a test platform protective cover is hinged above the test platform base plate.

[0013] As a further embodiment of this utility model: a test bench side door is provided on one side wall of the test bench shell.

[0014] As a further embodiment of this utility model, the other side of the test bench shell is provided with heat dissipation louvers.

[0015] As a further embodiment of this utility model: the bottom end of the test platform shell is provided with a test platform wire hole.

[0016] Compared with the prior art, the beneficial effects of this utility model are: This invention features high integration and portability, integrating the power supply, control, signal processing, and display units into a robust housing. Its compact structure and small size facilitate on-site testing at the tunnel boring machine (TBM) head or maintenance workshop, significantly improving testing efficiency. This invention boasts strong comprehensive testing capabilities, adapting to and testing most types of analog and digital sensors on TBMs, achieving multi-purpose functionality and reducing equipment procurement and maintenance costs. Employing PLC automatic control with built-in professional testing programs lowers the technical barrier for operators and avoids human error. This invention incorporates multiple safety protection mechanisms, ensuring high safety and reliability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a commonly used sensor detection device for tunnel boring machines.

[0018] Figure 2 This is a right view of a commonly used sensor detection device for tunnel boring machines.

[0019] Figure 3 This is a left view of a commonly used sensor detection device for tunnel boring machines.

[0020] Figure 4 This is a schematic diagram of the test platform panel in a commonly used sensor detection device for tunnel boring machines.

[0021] Figure 5 This is a layout diagram of electrical components in a commonly used sensor detection device for tunnel boring machines.

[0022] In the diagram: 1. Test bench panel; 2. Mounting holes; 3. Test bench base plate; 4. Test bench protective cover; 5. Test bench side door; 6. Heat dissipation louvers; 7. Test bench wiring holes; 8. Test bench outer shell; 9. Sensor connector plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] This utility model discloses a device for testing various sensors on a tunnel boring machine (TBM), including pressure sensors, inclinometers, displacement sensors, and temperature sensors. The device comprises a test bench, a PLC, a switching power supply, expansion modules, and a touchscreen. By connecting the sensor under test to the correct channel current, voltage, and resistance in the corresponding expansion module, and observing the data displayed on the touchscreen, the sensor's performance can be determined. This utility model provides a unified and convenient testing method for different types of sensors on a TBM, enabling more efficient and intelligent screening of sensor components.

[0026] Please see Figures 1-5 A commonly used sensor detection device for tunnel boring machines (TBMs) includes a test bench housing 8, a test bench base plate 3 inside the test bench housing 8, and a test bench panel 1 at the top of the test bench housing 8. The test bench panel 1 has mounting holes 2 and a sensor connector plate 9. A display screen is installed in the mounting holes 2, and the sensor connector plate 9 is used to connect the TBM's sensor to be tested. The panel 1 is made of insulating and wear-resistant material. Multiple mounting holes 2 are provided on the panel 1, one of which is a larger rectangular mounting hole for embedding a high-brightness industrial touchscreen 10 as a display screen, ensuring clear display even in dimly lit environments inside the tunnel. A multi-functional sensor connector plate 9 is also fixedly installed on the panel 1. This connector plate 9 integrates various industrial standard interfaces, such as: a 4-pin aviation socket for connecting analog sensors like pressure and temperature, providing power and signal channels; a BNC interface or M12 connector for connecting encoders and proximity switches; and an RS485 communication interface for connecting intelligent sensors such as inclinometers. Each interface is clearly labeled with its name and specifications to prevent mis-insertion.

[0027] The test bench base plate 3 is equipped with a PLC and expansion modules; The live wire of the external mains power is connected to the two input terminals of the double-throw power switch QF. One output terminal of the double-throw power switch QF connected to the live wire of the external mains power is connected to one end of the emergency stop switch. The other end of the emergency stop switch is connected to the PLC. The other output terminal of the double-throw power switch QF connected to the neutral wire of the external mains power is connected to the PLC. The input terminals of the PLC and DC / AC module are connected; the output terminals of the DC / AC module are connected to the display screen and expansion module; and the expansion module and sensor interface connection board 9 are connected for communication. The expansion modules connect to the PLC via dedicated bus cables for data and command exchange. The expansion modules are selected based on the type of sensor under test and may include: Analog Output Module (AO): used to generate excitation signals, such as providing a constant current source (e.g., 4-20mA circuit power supply) to a pressure sensor; Analog Input Module (AI): used to acquire sensor output signals, such as reading 4-20mA or 0-10V signals returned by a pressure sensor; Digital Input / Output Modules (DI / DO): used for testing proximity switches, limit switches, etc.; High-Speed ​​Counter Module (HSC): used for testing pulse output devices such as speed encoders and linear encoders; and Communication Modules: such as RS485 modules, used for communication with smart sensors using protocols such as Modbus. The signal output and input terminals of the expansion modules are connected to the corresponding pins on the sensor connector board 9 on the front panel via internal cables.

[0028] Two sets of connection lines between the double-throw power switch QF and the PLC are equipped with fuses FU1 and FU2 respectively; An emergency stop switch is installed on test bench panel 1; a double-throw power switch QF is also installed on test bench panel 1. A test platform protective cover 4 is hinged above the test platform base plate 3. When not in use, the test platform protective cover 4 is closed to prevent external dust, moisture and other factors from affecting the device, thereby increasing safety and facilitating the use of the device.

[0029] The test bench housing 8 has a test bench side door 5 on one side wall, which facilitates the fixing of electrical components and the routing of cables; The other side of the test bench housing 8 is provided with heat dissipation louvers 6, which are used to dissipate the heat generated by the electrical components after power is applied.

[0030] The bottom of the test bench housing 8 is provided with a test bench cable hole 7, which is used for the passage of sensor cables and test bench power cords.

[0031] Press the start button to power on the PLC and put it into operation. Connect the sensor's wiring to the correct channel of the expansion module, such as current, voltage, or resistance. The touchscreen will display the corresponding value, and the value will change with the sensor's movement, indicating that the sensor is functioning normally. If the touchscreen does not display a value, and the value remains unchanged despite the sensor's movement, it indicates that the sensor is malfunctioning and needs to be repaired or replaced.

[0032] The sensor under test is connected to the analog signal channels of the expansion module AE08, such as current, voltage, and resistance, through the terminal blocks on the test bench. After completion, a power-on test is performed.

[0033] Press the green button on the control panel to power on the PLC. The expansion module receives the sensor signal, performs the scanning instruction according to the program logic, and then transmits the received sensor signal to the touch screen to display the corresponding value.

[0034] Using the aforementioned detection device, eight specifications and three types of sensors can be detected simultaneously, with each sensor providing a unique detection result. The expansion module contains eight analog channels, allowing different current, voltage, and resistance settings for each channel to be configured according to the sensor type. Each channel corresponds to a unique address on the touchscreen, ensuring a one-to-one mapping. Furthermore, the upper and lower limits of sensor values ​​can be adjusted via the touchscreen settings as needed, making it widely applicable.

[0035] The working principle of this invention is as follows: A double-throw power switch introduces mains power to provide the entire system with total power. An emergency stop switch can quickly cut off the PLC's power supply in emergencies, thereby cutting off the power output of the entire system through PLC program control or associated circuits, ensuring safety. The PLC, as the control core, coordinates the entire testing process. The DC / AC module converts the DC or mains power provided by the PLC to provide the necessary operating power for the display screen and expansion modules. Expansion modules (typically including analog input / output modules, digital input / output modules, dedicated communication modules, etc.) are responsible for generating the excitation signals (such as constant current sources, voltages, pulses, etc.) required to drive the sensor under test, and for acquiring the response signals returned by the sensor (such as 4-20mA current, 0-10V voltage, RS485 data, switch signals, etc.). The acquired data is uploaded to the PLC for processing and judgment, and the test results (such as pass / fail, measured values, curves, etc.) are finally displayed on the display screen in real time. Operators only need to insert the sensor under test into the sensor connector board to complete the test with one click, without the need for complex wiring and debugging.

[0036] This invention features high integration and portability, integrating the power supply, control, signal processing, and display units into a robust housing. Its compact structure and small size facilitate on-site testing at the tunnel boring machine (TBM) head or maintenance workshop, significantly improving testing efficiency. This invention boasts strong comprehensive testing capabilities. By configuring different expansion modules such as AI / AO, DI / DO, and counter modules, the device can adapt to and test most types of analog and digital sensors on TBMs, achieving multi-purpose functionality and reducing equipment procurement and maintenance costs. This invention is simple to operate and highly intelligent, employing PLC automatic control and a built-in professional testing program. The user interface is user-friendly, allowing all operations to be completed and test results read intuitively via the display screen, lowering the technical threshold for operators and avoiding human error. This invention offers high safety and reliability, incorporating multiple safety protection mechanisms, including a double-throw disconnect switch, emergency stop button, and fuses, providing comprehensive protection from mechanical to electrical levels. This effectively prevents accidents such as electric shock, overcurrent, and short circuits, ensuring the safety of personnel and equipment. This invention exhibits excellent environmental adaptability. The protective cover of the test bench, sealed wiring holes, heat dissipation louvers, and robust outer casing design provide the device with superior dustproof, moisture-proof, foreign object intrusion prevention, and heat dissipation performance, enabling it to withstand the harsh working conditions inside tunnels and ensuring the stability and accuracy of test results. Furthermore, this invention is easy to maintain. The side door of the test bench and the hinged protective cover design make the installation, wiring, inspection, and maintenance of internal components extremely convenient.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects; the scope of this invention is defined by the appended claims rather than the foregoing description; and thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution; this narrative style is merely for clarity; those skilled in the art should consider the specification as a whole; the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A commonly used sensor detection device for tunnel boring machines, characterized in that, The test bench includes a test bench housing (8), a test bench base plate (3) inside the test bench housing (8), a test bench panel (1) at the top of the test bench housing (8), a mounting hole (2) and a sensor socket connection plate (9) on the test bench panel (1), a display screen is installed in the mounting hole (2), and the sensor socket connection plate (9) is used to connect the shield machine's sensor to be tested; a PLC and an expansion module are provided on the test bench base plate (3); the live wire of the external mains power is connected to the two input terminals of the double-throw power switch QF, one output terminal of the double-throw power switch QF connected to the live wire of the external mains power is connected to one end of the emergency stop switch, the other end of the emergency stop switch is connected to the PLC, and the other output terminal of the double-throw power switch QF connected to the neutral wire of the external mains power is connected to the PLC; the PLC is connected to the input terminal of the DC / AC module, the output terminal of the DC / AC module is connected to the display screen and the expansion module, and the expansion module is connected to the sensor socket connection plate (9) for communication; the expansion module is connected to the PLC through a bus cable.

2. The commonly used sensor detection device for tunnel boring machines according to claim 1, characterized in that, The expansion modules include an analog output module AO, an analog input module AI, a digital input / output module DI / DO, a high-speed counter module HSC, or a communication module.

3. A commonly used sensor detection device for tunnel boring machines according to claim 2, characterized in that, The signal output and input terminals of the expansion module are connected to the corresponding pins of the sensor socket connection board (9) on the panel via internal cables.

4. A commonly used sensor detection device for tunnel boring machines according to claim 3, characterized in that, The two sets of connection lines between the double-throw power switch QF and the PLC are respectively equipped with fuses FU1 and FU2.

5. A commonly used sensor detection device for tunnel boring machines according to claim 4, characterized in that, The double-throw power switch QF is also installed on the test bench panel (1).

6. A commonly used sensor detection device for tunnel boring machines according to claim 5, characterized in that, The emergency stop switch is installed on the test bench panel (1).

7. A commonly used sensor detection device for tunnel boring machines according to claim 1, characterized in that, The test platform base plate (3) is hinged to a test platform protective cover (4).

8. A commonly used sensor detection device for tunnel boring machines according to claim 7, characterized in that, The test bench housing (8) has a test bench side door (5) on one side wall.

9. A commonly used sensor detection device for tunnel boring machines according to claim 8, characterized in that, The test bench housing (8) is provided with heat dissipation louvers (6) on the other side.

10. A commonly used sensor detection device for tunnel boring machines according to claim 9, characterized in that, The test bench housing (8) has a test bench wiring hole (7) at the bottom.

Images