Vibration wire sensor fault detection system

Abstract

The utility model relates to the technical field of vibrating wire sensor detection, in particular to a vibrating wire sensor fault detection system, which comprises a power supply module, a vibrating wire sensor body, a detection module and an MCU module, the power supply module and the vibrating wire sensor body are both connected with the detection module, and the power supply module and the detection module are both connected with the MCU module. The power supply module is used for supplying power to the detection module and the MCU module. The detection module is used for detecting the resistance value of the vibrating wire sensor body and feeding back the measured resistance value to the MCU module, the MCU processes the measured resistance value to achieve fault detection of the vibrating wire sensor, the structure is simple, a specific fault reason does not need to be determined through manual troubleshooting, and the troubleshooting process is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of vibrating string sensor detection, in particular to a vibrating string sensor fault detection system. Background Art

[0002] Vibrating string sensors are widely used in the construction of tunnels, bridges, and foundation pits in the transportation sector, monitoring internal support axial forces, supporting structure stress, and soil pressure during construction. However, due to the complex signal conditioning circuits and numerous electronic components, these sensors are susceptible to environmental, connection, and mechanical damage, leading to various unknown failures. Manual troubleshooting is required to determine the specific cause, resulting in significant waste of labor and resources. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art.

[0004] To this end, the utility model provides a vibrating string sensor fault detection system, which has a simple structure and can perform fault detection on the vibrating string sensor in a timely manner.

[0005] A vibrating wire sensor fault detection system according to an embodiment of the present invention includes:

[0006] Power module;

[0007] Vibrating wire sensor body;

[0008] a detection module, the power supply module and the vibrating wire sensor body being connected to the detection module;

[0009] The MCU module, the power module and the detection module are both connected to the MCU module.

[0010] The utility model has the beneficial effect of providing a vibrating string sensor fault detection system with a power supply module for supplying power to a detection module and an MCU module. The detection module detects the resistance of the vibrating string sensor and feeds the measured resistance value back to the MCU module, which then processes the measured resistance value to detect a vibrating string sensor fault. The utility model has a simple structure, eliminates the need for manual troubleshooting to determine the specific cause of the fault, simplifies the troubleshooting process, significantly improves the reliability and stability of the vibrating string sensor, and ensures engineering quality and safety.

[0011] According to one embodiment of the present invention, the output end of the vibrating string sensor body has five core wires, namely: a red wire, a black wire, a green wire, a white wire and a yellow wire.

[0012] According to one embodiment of the present invention, the detection module includes six detection units, each detection unit includes a control end, two detection ends and an output end, wherein each of the control ends and each of the output ends are respectively connected to the MCU module;

[0013] The six detection units are respectively a first detection unit, a second detection unit, a third detection unit, a fourth detection unit, a fifth detection unit and a sixth detection unit;

[0014] Wherein, the two detection ends of the first detection unit are connected to the red line and the black line respectively;

[0015] Two detection ends of the second detection unit are connected to the green line and the white line respectively;

[0016] The two detection ends of the third detection unit are connected to the red line and the yellow line respectively;

[0017] Two detection ends of the fourth detection unit are connected to the green line and the yellow line respectively;

[0018] The two detection ends of the fifth detection unit are connected to the red line and the white line respectively;

[0019] Two detection ends of the sixth detection unit are connected to the green line and the black line respectively.

[0020] According to an embodiment of the present invention, the circuit structure of each detection unit is the same, and each detection unit includes: a relay and a voltage follower circuit connected to the relay.

[0021] According to one embodiment of the present invention, the model of the relay is KAQW212A, and the relay includes 8 pins, wherein pin 1 of the relay is the control end of the detection unit, pin 8 and pin 6 are two detection ends respectively, pin 7 is connected to the voltage follower circuit, pin 2 is connected to pin 3, and pin 4 and pin 5 are both connected to the common ground end.

[0022] According to one embodiment of the present invention, the voltage follower circuit includes: an operational amplifier, a first capacitor, a second capacitor, and a first resistor;

[0023] One end of the first resistor is connected to the reference voltage terminal, the other end of the first resistor and pin 7 of the relay are both connected to pin 1 of the operational amplifier, the first capacitor and the second capacitor are connected in parallel, one end after connection and pin 5 of the operational amplifier are both connected to the power supply output terminal, the other end and pin 2 of the operational amplifier are both connected to the common ground terminal, pin 3 of the operational amplifier is connected to pin 4, and the connected node is the output terminal of the detection unit.

[0024] According to one embodiment of the present invention, the MCU module includes a single-chip microcomputer, and the model of the single-chip microcomputer is an integrated chip of the STM32 series.

[0025] According to an embodiment of the present invention, the power module includes a power conversion unit for converting an input power signal into a power supply signal required by the detection module and the MCU module.

[0026] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The objectives and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] Figure 1 It is a structural diagram of the present utility model.

[0030] Figure 2 This is a circuit principle diagram of a detection unit of the utility model.

[0031] In the figure: 1. Power module; 2. Vibrating string sensor body; 3. Detection module; 4. MCU module; 11. Power conversion unit. DETAILED DESCRIPTION

[0032] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0034] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0035] like Figure 1 As shown, a vibrating string sensor fault detection system includes a power module 1, a vibrating string sensor body 2, a detection module 3, and an MCU module 4. The power module 1 and the vibrating string sensor body 2 are both connected to the detection module 3, and both the power module 1 and the detection module 3 are connected to the MCU module 4. The power module 1 is used to supply power to the detection module 3 and the MCU module 4. The detection module 3 is used to detect the resistance of the vibrating string sensor body 2 and feed the measured resistance value back to the MCU module 4. The MCU processes the measured resistance value to detect the vibrating string sensor fault.

[0036] In this embodiment, the output end of the vibrating wire sensor body 2 has five core wires: a red wire, a black wire, a green wire, a white wire, and a yellow wire. When the vibrating wire sensor body 2 is operating normally, the reference value of the insulation resistance between the red and black wires is ≤450Ω, the reference value of the insulation resistance between the green and white wires is 1.5KΩ to 30KΩ, the reference value of the insulation resistance between the red and yellow wires is ≥50MΩ, the reference value of the insulation resistance between the green and yellow wires is ≥50MΩ, the reference value of the insulation resistance between the red and white wires is ≥10MΩ, and the reference value of the insulation resistance between the green and black wires is ≥10MΩ.

[0037] In the embodiment, the detection module 3 includes six detection units, each detection unit includes a control end, two detection ends and an output end, wherein each control end and each output end are respectively connected to the MCU module 4; the six detection units are respectively a first detection unit, a second detection unit, a third detection unit, a fourth detection unit, a fifth detection unit and a sixth detection unit; wherein the two detection ends of the first detection unit are respectively connected to the red line and the black line to measure the resistance of the insulation resistance between the red and black lines; the two detection ends of the second detection unit are respectively connected to the green line and the white line to measure the resistance of the insulation resistance between the green and white lines; the two detection ends of the third detection unit are respectively connected to the red line and the yellow line to measure the resistance of the insulation resistance between the red and yellow lines; the two detection ends of the fourth detection unit are respectively connected to the green line and the yellow line to measure the resistance of the insulation resistance between the green and yellow lines; the two detection ends of the fifth detection unit are respectively connected to the red line and the white line to measure the resistance of the insulation resistance between the red and white lines; the two detection ends of the sixth detection unit are respectively connected to the green line and the black line to measure the resistance of the insulation resistance between the green and black lines.

[0038] In the embodiment, the control end MCU module 4 controls each detection unit to enable the fault detection function, and each detection unit also feeds back the detected resistance value to the MCU module 4 through the output end. The MCU module 4 compares the six resistance values ​​obtained with the corresponding reference values. If all are within the reference value range, the vibrating string sensor is working normally; if one of the six resistance values ​​obtained is 0, the vibrating string sensor is short-circuited; if one of the six resistance values ​​obtained is ∞, the vibrating string sensor is open-circuited; if the resistance value measured among the six resistance values ​​obtained is ≤200Ω, the resistance value has decreased due to moisture, and the vibrating string sensor has been damped.

[0039] Furthermore, the circuit structure of each detection unit is the same, such as Figure 2 As shown, each detection unit includes a relay and a voltage follower circuit connected to the relay. The relay model is KAQW212A and has eight pins. Pin 1 of the relay is the control terminal of the detection unit, pins 8 and 6 are the two detection terminals, pin 7 is connected to the voltage follower circuit, pins 2 and 3 are connected, and pins 4 and 5 are both connected to the common ground. The relay is controlled by the MCU module 4 and starts to operate.

[0040] The voltage follower circuit includes an operational amplifier, a first capacitor, a second capacitor, and a first resistor; the operational amplifier model is, but is not limited to, DIO3581ST5. One end of the first resistor is connected to a reference voltage terminal, the other end of the first resistor and pin 7 of the relay are both connected to pin 1 of the operational amplifier, the first capacitor and the second capacitor are connected in parallel, one end of the connection and pin 5 of the operational amplifier are both connected to the power output terminal, and the other end and pin 2 of the operational amplifier are both connected to a common ground terminal. Pins 3 and 4 of the operational amplifier are connected, and the connected node becomes the output terminal of the detection unit. For example, a detection unit measures the insulation resistance between a red and black wire. Pins 8 and 6 of the relay measure the insulation resistance between the red and black wires, divide the measured resistance value by a first resistor, and convert the resistance value into a voltage value. This resistance value is then converted to a voltage value by an operational amplifier for voltage following. The voltage value is then transmitted to the MCU module 4 via the output terminal of the detection unit. The MCU module 4 performs A / D conversion, converting the voltage value (analog signal) into a digital signal.

[0041] In the embodiment, the MCU module 4 includes a single chip microcomputer, and the model of the single chip microcomputer is an integrated chip of the STM32 series, such as STM32F407VET6.

[0042] In this embodiment, the power module 1 includes a power conversion unit 11 for converting an input power signal into a power supply signal required by the detection module 3 and the MCU module 4. If the voltage range of the input power signal is 3.6-28V, and the voltage of the power supply signal required by the detection module 3 and the MCU module 4 is 3.3, the power conversion unit 11 is configured to process the input power signal.

[0043] The power supply module 1 of the vibrating string sensor fault detection system of the present invention is used to supply power to the detection module 3 and the MCU module 4. The detection module 3 is used to detect the resistance value of the vibrating string sensor body 2 and feed back the measured resistance value to the MCU module 4. The MCU processes the measured resistance value to realize fault detection of the vibrating string sensor. The structure is simple, and there is no need for manual investigation to determine the specific cause of the fault, which simplifies the fault troubleshooting process, significantly improves the reliability and stability of the vibrating string sensor, and ensures the quality and safety of the project.

[0044] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0045] Based on the above-described preferred embodiments of the present invention, and in accordance with the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A vibrating wire sensor fault detection system, characterized in that: The system comprises: Power module (1); Vibrating wire sensor body (2); A detection module (3), the power supply module (1) and the vibrating string sensor body (2) are both connected to the detection module (3); The MCU module (4), the power module (1) and the detection module (3) are both connected to the MCU module (4).

2. The vibrating wire sensor fault detection system as claimed in claim 1, wherein: The output end of the vibrating string sensor body (2) has five core wires, namely: a red wire, a black wire, a green wire, a white wire and a yellow wire.

3. The vibrating wire sensor fault detection system as claimed in claim 2, wherein: The detection module (3) includes six detection units, each detection unit includes a control terminal, two detection terminals and an output terminal, wherein each of the control terminals and each of the output terminals are respectively connected to the MCU module (4); The six detection units are respectively a first detection unit, a second detection unit, a third detection unit, a fourth detection unit, a fifth detection unit and a sixth detection unit; Wherein, the two detection ends of the first detection unit are connected to the red line and the black line respectively; Two detection ends of the second detection unit are connected to the green line and the white line respectively; The two detection ends of the third detection unit are connected to the red line and the yellow line respectively; Two detection ends of the fourth detection unit are connected to the green line and the yellow line respectively; The two detection ends of the fifth detection unit are connected to the red line and the white line respectively; Two detection ends of the sixth detection unit are connected to the green line and the black line respectively.

4. The vibrating wire sensor fault detection system as claimed in claim 3, wherein: The circuit structure of each detection unit is the same, and each detection unit includes: a relay and a voltage follower circuit connected to the relay.

5. The vibrating wire sensor fault detection system as claimed in claim 4, wherein: The model of the relay is KAQW212A, and the relay includes 8 pins, wherein pin 1 of the relay is the control end of the detection unit, pin 8 and pin 6 are two detection ends respectively, pin 7 is connected to the voltage follower circuit, pin 2 and pin 3 are connected, and pin 4 and pin 5 are both connected to the common ground end.

6. The vibrating wire sensor fault detection system as claimed in claim 5, wherein: The voltage follower circuit includes: an operational amplifier, a first capacitor, a second capacitor and a first resistor; One end of the first resistor is connected to the reference voltage terminal, the other end of the first resistor and pin 7 of the relay are both connected to pin 1 of the operational amplifier, the first capacitor and the second capacitor are connected in parallel, one end after connection and pin 5 of the operational amplifier are both connected to the power supply output terminal, the other end and pin 2 of the operational amplifier are both connected to the common ground terminal, pin 3 of the operational amplifier is connected to pin 4, and the connected node is the output terminal of the detection unit.

7. The vibrating wire sensor fault detection system as claimed in claim 1, wherein: The MCU module (4) includes a single-chip microcomputer, and the model of the single-chip microcomputer is an integrated chip of the STM32 series.

8. The vibrating wire sensor fault detection system as claimed in claim 1, wherein: The power module (1) comprises a power conversion unit (11) for converting an input power signal into a power supply signal required by the detection module (3) and the MCU module (4).

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