Piezoelectric aggregate sensor with antenna and bridge vibration detection equipment

Abstract

The utility model discloses a piezoelectric aggregate sensor with an antenna and bridge vibration detection equipment, and belongs to the technical field of bridge vibration detection, the piezoelectric aggregate sensor with the antenna comprises a piezoelectric aggregate sensor auxiliary installation mechanism, the piezoelectric aggregate sensor auxiliary mounting mechanism comprises a protective mounting assembly and a piezoelectric aggregate sensor body, the protective mounting assembly comprises a protective cylinder, the protective cylinder sleeves the piezoelectric aggregate sensor body, one end of the protective cylinder is adhered to a bridge body, and the other end of the protective cylinder is hermetically provided with a sealing cover plate. The piezoelectric aggregate sensor body is adhered to the bridge body in the protective cylinder, and the piezoelectric aggregate sensor auxiliary installation mechanism is a key part for ensuring accurate installation and stable work of the sensor. A protective cylinder in the protective mounting assembly is made of a material with good electromagnetic wave penetrability.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge vibration detection field, specifically, relate to a kind of piezoelectric aggregate sensor with antenna and bridge vibration detection equipment. BACKGROUND

[0002] Bridge as important traffic infrastructure, its structural health condition is crucial to traffic safety.In the long-term use of bridge, due to the influence of vehicle load, wind, earthquake and other external factors, bridge structure can appear damage and performance degradation.In order to find these potential problems in time, bridge vibration detection technology emerges as the times require.

[0003] Traditional bridge vibration detection method often relies on wired sensor, which needs to lay a large number of cables when installing and maintaining, not only high cost, but also in complex bridge environment, cable is easily damaged, affect the accuracy and stability of detection data.In addition, some existing wireless sensor is not enough stable in the combination mode with bridge structure, is easily disturbed by environmental factors, leading to detection precision decline.

[0004] With the development of wireless communication technology and intelligent material, piezoelectric material is widely used in sensor field because of its characteristics of generating electric signal when subjected to stress.Piezoelectric aggregate sensor made of piezoelectric material is applied to bridge vibration detection, with the advantages of no external power supply, high sensitivity, fast response, etc.However, existing piezoelectric aggregate sensor still has some problems in practical application, such as insufficient protection in harsh environment, installation convenience and reliability need to be improved, etc.How to invent a kind of piezoelectric aggregate sensor with antenna and bridge vibration detection equipment to improve these problems has become a problem to be solved by the technical personnel in the field. UTILITY MODEL CONTENT

[0005] In order to make up for the above shortcomings, the utility model provides a kind of piezoelectric aggregate sensor with antenna and bridge vibration detection equipment, to improve the problem of insufficient protection of existing piezoelectric aggregate sensor and unreliable installation.

[0006] The utility model is realized as follows: a kind of piezoelectric aggregate sensor with antenna, including

[0007] Piezoelectric aggregate sensor auxiliary installation mechanism, the piezoelectric aggregate sensor auxiliary installation mechanism includes protective installation component and piezoelectric aggregate sensor body, the protective installation component includes protective cylinder, the protective cylinder is sleeved in the outside of piezoelectric aggregate sensor body, one end of the protective cylinder is adhered with bridge body, the other end of the protective cylinder is sealed with sealing cover plate, and the piezoelectric aggregate sensor body is adhered with bridge body in the inside of the protective cylinder.

[0008] In a preferred technical scheme of the utility model, one end of the protection cylinder connected with the bridge body is fixedly connected with a sticky ring plate, the inner diameter of the sticky ring plate is same with the inner diameter of the protection cylinder, and the outer diameter of the sticky ring plate is 1-5cm larger than the outer diameter of the protection cylinder.

[0009] In a preferred technical scheme of the utility model, one end of the protection cylinder connected with the bridge body is fixedly connected with a sticky ring plate, the inner diameter of the sticky ring plate is same with the inner diameter of the protection cylinder, and the outer diameter of the sticky ring plate is 1-5cm larger than the outer diameter of the protection cylinder.

[0010] In a preferred technical scheme of the utility model, the outer wall of the sealing cover plate is provided with a screw thread, the inner wall of the outer end of the protection cylinder is provided with an inner screw thread connected with the sealing cover plate, and the end of the sealing cover plate is fixedly connected with an outer screw plate.

[0011] In a preferred technical scheme of the utility model, the outer screw plate is provided with a positive polygon.

[0012] In a preferred technical scheme of the utility model, the outer screw plate and the middle part of the sealing cover plate are provided with a threaded rod penetratingly, the end of the threaded rod is limitingly and rotatably connected with a pressing disc, the pressing disc corresponds to and abuts against the back of the piezoelectric aggregate sensor body, and the other end of the threaded rod is fixedly connected with a screw handle.

[0013] In a preferred technical scheme of the utility model, the outer screw plate is provided with a positive polygon.

[0014] In a preferred technical scheme of the utility model, the outer screw handle is provided with a disc, and the outer wall of the disc is uniformly and equally divided to be provided with an arc-shaped groove.

[0015] In a preferred technical scheme of the utility model, the piezoelectric aggregate sensor body is internally provided with a signal processing module and a wireless communication module, and the surface of the piezoelectric aggregate sensor body is provided with an antenna plating layer.

[0016] In another preferred technical scheme of the utility model, a bridge vibration detection equipment comprises a piezoelectric aggregate sensor with an antenna, a plurality of piezoelectric aggregate sensor bodies are provided, the piezoelectric aggregate sensor bodies are electrically and telecommunicationally connected with a detection equipment body, the detection equipment body is internally provided with a signal processing module and a wireless communication module, and the detection equipment body is electrically and telecommunicationally connected with the piezoelectric aggregate sensor bodies.

[0017] The beneficial effects of this utility model are as follows: The piezoelectric aggregate sensor with antenna and bridge vibration detection equipment obtained through the above design, when in use, have a protective sleeve fitted over the outside of the piezoelectric aggregate sensor body. This effectively prevents external environmental factors (such as rainwater, dust, corrosive substances, etc.) from eroding and damaging the sensor body, extending the sensor's service life. A sealing cover seals one end of the protective sleeve, further enhancing the protective effect and ensuring the sensor can operate normally in harsh environments. Simultaneously, the piezoelectric aggregate sensor body has a built-in signal processing module and wireless communication module, and its surface is coated with an antenna layer, enabling wireless signal transmission. This feature eliminates the need for complex cable laying during bridge vibration detection, reducing installation costs and maintenance difficulty, and also reducing data transmission problems caused by cable damage. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the main structure of the detection device provided in this embodiment of the utility model;

[0020] Figure 2 A schematic diagram of the auxiliary installation mechanism for the piezoelectric aggregate sensor provided for an embodiment of this utility model;

[0021] Figure 3 A schematic diagram of the internal structure of the protective installation component provided for an embodiment of this utility model;

[0022] Figure 4 A schematic diagram of the disassembled structure of the protective installation component provided for an embodiment of this utility model.

[0023] In the diagram: 100 - Detection equipment body; 200 - Piezoelectric aggregate sensor auxiliary installation mechanism; 210 - Protective installation component; 211 - Protective cylinder; 212 - Sealing cover plate; 213 - External screw plate; 214 - Adhesive ring plate; 215 - Threaded rod; 216 - Extrusion disc; 217 - Screwing handle; 218 - Drainage hole; 220 - Piezoelectric aggregate sensor body. Detailed Implementation

[0024] To make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0025] Please refer to Figures 1 to 3 The present application provides a technical solution: a piezoelectric aggregate sensor with an antenna, comprising

[0026] The piezoelectric aggregate sensor auxiliary installation mechanism 200 comprises a protective installation assembly 210 and a piezoelectric aggregate sensor body 220. The protective installation assembly 210 comprises a protective cylinder 211, which is sleeved on the outside of the piezoelectric aggregate sensor body 220. One end of the protective cylinder 211 is adhered to the bridge body, and the other end of the protective cylinder 211 is provided with a sealing cover plate 212. The piezoelectric aggregate sensor body 220 is adhered to the bridge body inside the protective cylinder 211. The piezoelectric aggregate sensor auxiliary installation mechanism 200 is a key part to ensure accurate installation and stable work of the sensor. The protective cylinder 211 in the protective installation assembly 210 is made of a material with good electromagnetic wave permeability.

[0027] A small power management module can be additionally arranged inside the piezoelectric aggregate sensor body 220 to manage the power supply of the sensor. In the case that the mechanical energy generated by the bridge vibration is sufficient, the power management module can store and reasonably distribute the electric energy generated by the piezoelectric material. When the electric energy generated by the vibration is insufficient, the power management module can be switched to the backup battery for power supply to ensure continuous work of the sensor.

[0028] The sealing cover plate 212 not only plays a role of sealing the protective cylinder 211, but also plays a role of protecting and limiting the internal sensor body 220. In order to enhance the sealing effect, a rubber sealing ring can be arranged on the contact surface between the sealing cover plate 212 and the protective cylinder 211. When the piezoelectric aggregate sensor body 220 is adhered to the bridge body inside the protective cylinder 211, conductive glue can be applied on the contact surface between the sensor body 220 and the bridge body. On the one hand, the conductive glue realizes adhesion, and on the other hand, the conductive glue ensures the electrical connection between the sensor and the bridge body, so as to ensure that the bridge vibration signal can be accurately sensed.

[0029] Please refer to Figures 2 to 4The end of the protection cylinder 211 connected with the bridge body is fixedly connected with a sticky ring plate 214, the inner diameter of the sticky ring plate 214 is the same as the inner diameter of the protection cylinder 211, and the outer diameter of the sticky ring plate 214 is 1-5 cm larger than the outer diameter of the protection cylinder 211. The surface of the sticky ring plate 214 adhered to the bridge body is uniformly provided with concave-convex particles, and a plurality of drainage holes 218 are uniformly arranged below the sticky ring plate 214. The plurality of drainage holes 218 are used for preventing water in the protection cylinder 211 and for draining water. When installed, the drainage holes 218 are located directly below the protection cylinder 211. The principle of the concave-convex particles is to increase the physical occlusion and friction with the surface of the bridge body to improve the firmness of the adhesion.

[0030] The outer wall of the sealing cover plate 212 is provided with threads, the inner wall of the outer end of the protection cylinder 211 is provided with internal threads connected with the sealing cover plate 212, and the end of the sealing cover plate 212 is fixedly connected with an outer screw plate 213. The surface of the outer screw plate 213 close to the sealing cover plate 212 is in sealing abutment with the end of the protection cylinder 211, the outer screw plate 213 is provided with a regular polygon, which is convenient for screwing by a wrench. The middle part of the outer screw plate 213 and the sealing cover plate 212 is provided with a threaded rod 215 in threaded penetration, the end of the threaded rod 215 is limitingly rotationally connected with a pressing disc 216, the pressing disc 216 corresponds to and abuts against the back of the piezoelectric aggregate sensor body 220, the other end of the threaded rod 215 is fixedly connected with a screw handle 217, and the pressing disc 216 remains stable and concentric with the threaded rod 215 in the rotating process. The surface of the pressing disc 216 close to the piezoelectric aggregate sensor body 220 is provided with a rubber non-slip pad, and the other surface of the pressing disc 216 is limitingly rotationally connected with the threaded rod 215 through a bearing. The screw handle 217 is provided with a disc, and the outer wall of the disc is uniformly and equally divided to be provided with an arc-shaped groove.

[0031] The piezoelectric aggregate sensor body 220 is internally provided with a signal processing module and a wireless communication module, and the surface of the piezoelectric aggregate sensor body 220 is provided with an antenna plating layer. A microprocessor can be additionally arranged in the piezoelectric aggregate sensor body 220 for unified control and management of the signal processing module and the wireless communication module. The microprocessor can preliminarily analyze and process the collected vibration data, such as calculating the frequency and amplitude of the vibration, and judging whether the vibration state of the bridge is normal according to a preset threshold value. When abnormal vibration is detected, the microprocessor can immediately send alarm information to the bridge monitoring center through the wireless communication module.

[0032] The application discloses a bridge vibration detection device, which comprises a piezoelectric aggregate sensor with an antenna, a plurality of piezoelectric aggregate sensor bodies 220 are provided, and each of the plurality of piezoelectric aggregate sensor bodies 220 is electrically connected with a detection device body 100; the detection device body 100 is internally provided with a signal processing module and a wireless communication module; the detection device body 100 is electrically connected with the plurality of piezoelectric aggregate sensor bodies 220; and the plurality of piezoelectric aggregate sensor bodies 220 are distributed at key positions of a bridge, such as a pier, a midspan of a beam body and a support, so as to comprehensively and accurately monitor the vibration of the bridge.

[0033] The detection device body 100 is the core of the whole detection system, and the signal processing module built-in the detection device body 100 has a more powerful function. In addition to having the pre-amplification, filtering and analog-to-digital conversion functions similar to the signal processing module in the piezoelectric aggregate sensor body 220, the detection device body 100 further comprises a data fusion algorithm module. The data fusion algorithm module can perform fusion processing on the vibration data from the plurality of piezoelectric aggregate sensor bodies 220, for example, by using a weighted average method, a Kalman filtering method or the like, so as to eliminate noise and errors in the data and improve the accuracy and reliability of the data.

[0034] In addition to being capable of receiving wireless signals from the piezoelectric aggregate sensor body 220, the wireless communication module of the detection device body 100 also has a remote communication function. It can transmit the processed data to a remote bridge monitoring center through a cellular network (such as 4G / 5G) or a wireless local area network (Wi-Fi). In the remote bridge monitoring center, the vibration data of the bridge can be stored, analyzed and visually displayed for a long time, so that the bridge management personnel can master the health condition of the bridge in real time.

[0035] In order to ensure the stable operation of the detection device body 100, a power management system is further arranged in the detection device body 100, which comprises a large-capacity rechargeable battery and a power conversion circuit. The power conversion circuit can convert the external input alternating current (such as mains) into direct current suitable for use of the electronic modules in the device, and perform charging management on the battery. Meanwhile, the power management system also has a low-power design, and when the device is in a standby state, it can automatically enter a low-power mode to prolong the use time of the battery.

[0036] In addition, the detection device body 100 can be further provided with a display screen and an operation interface, which are used for locally displaying the bridge vibration data and performing device parameter setting and the like. The display screen can adopt a liquid crystal display screen (LCD) or an organic light-emitting diode display screen (OLED), and the operation interface can be a touch screen or a key operation mode, so as to facilitate the on-site maintenance personnel to operate and check the data.

[0037] Working principle: the protective cylinder 211 is adhered to the bridge body through the adhesive ring plate 214, and the concave-convex particles on the adhesive ring plate 214 increase the contact area and friction with the bridge body, so that the protective cylinder 211 can be stably installed on the bridge body. The sealing cover plate 212 is connected with the protective cylinder 211 through threads, and the outer screwing plate 213 facilitates the installation and dismounting operation of the sealing cover plate 212 by the operator. The threaded rod 215 penetrates through the outer screwing plate 213 and the sealing cover plate 212, and the extrusion disc 216 at the end thereof rotates forward under the action of the screwing handle 217. The rubber non-slip pad on the side of the extrusion disc 216 close to the piezoelectric aggregate sensor body 220 can increase the friction, so as to firmly fix the sensor body 220 in the protective cylinder 211 and prevent it from falling off during the vibration of the bridge.

[0038] The plurality of piezoelectric aggregate sensor bodies 220 are distributed at key positions of the bridge, and can sense the vibration condition of the bridge in real time and send data in the form of wireless signals. The detection equipment body 100 receives the wireless signals from the piezoelectric aggregate sensor bodies 220 through the built-in wireless receiving module, and the signal processing module in the detection equipment body 100 further processes the collected vibration data, for example, calculates the frequency, amplitude, phase and other parameters of the bridge vibration through the fast Fourier transform (FFT) algorithm and the like. According to these parameters, in combination with the preset threshold value and analysis model, the structural health condition of the bridge is evaluated, and whether the bridge has damage or performance degradation and other problems is judged.

[0039] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A piezoelectric aggregate sensor with antenna, characterized in that Comprising The piezoelectric aggregate sensor auxiliary installation mechanism comprises a protective installation component and a piezoelectric aggregate sensor body, the protective installation component comprises a protective cylinder, the protective cylinder is sleeved on the outside of the piezoelectric aggregate sensor body, one end of the protective cylinder is adhered with a bridge body, and the other end of the protective cylinder is provided with a sealing cover plate in a sealing mode.

2. A piezoelectric aggregate sensor with antenna as claimed in claim 1, characterized in that: The end of the protective cylinder connected with the bridge body is fixedly connected with a sticky ring plate, the inner diameter of the sticky ring plate is the same as the inner diameter of the protective cylinder, and the outer diameter of the sticky ring plate is 1-5cm larger than the outer diameter of the protective cylinder.

3. A piezoelectric aggregate sensor with antenna as claimed in claim 2, characterized in that: The surface of the sticky ring plate adhered with the bridge body is uniformly provided with concave-convex particles, and a plurality of drainage holes are uniformly arranged below the sticky ring plate.

4. A piezoelectric aggregate sensor with antenna as claimed in claim 2, characterized in that: The outer wall of the sealing cover plate is provided with threads, the inner wall of the outer end of the protective cylinder is provided with internal threads connected with the sealing cover plate, and the end of the sealing cover plate is fixedly connected with an outer screw plate.

5. A piezoelectric aggregate sensor with antenna as claimed in claim 4, characterized in that: The surface of the outer screw plate close to the sealing cover plate is sealingly abutted with the end of the protective cylinder, and the outer screw plate is provided in a regular polygonal shape.

6. A piezoelectric aggregate sensor with antenna as claimed in claim 5, characterized in that: The middle part of the outer screw plate and the sealing cover plate is provided with a threaded rod in a threaded penetrating mode, the end of the threaded rod is limitingly and rotationally connected with a pressing disc, the pressing disc is correspondingly abutted with the back of the piezoelectric aggregate sensor body, and the other end of the threaded rod is fixedly connected with a screw handle.

7. A piezoelectric aggregate sensor with antenna as claimed in claim 6, characterized in that: The surface of the pressing disc close to the piezoelectric aggregate sensor body is provided with a rubber non-slip pad, and the other surface of the pressing disc is limitingly and rotationally connected with the threaded rod through a bearing.

8. A piezoelectric aggregate sensor with antenna as claimed in claim 6, characterized in that: The screw handle is provided in a disc shape, and the outer wall of the disc is uniformly and equally divided to form arc-shaped grooves.

9. A piezoelectric aggregate sensor with antenna according to claim 1, characterized in that: The piezoelectric aggregate sensor body is internally provided with a signal processing module and a wireless communication module, and the surface of the piezoelectric aggregate sensor body is provided with an antenna plating layer.

10. A bridge vibration detection apparatus comprising the piezoelectric aggregate sensor with antenna according to any one of claims 1 to 9, characterized in that: A plurality of piezoelectric aggregate sensor bodies are provided, and the plurality of piezoelectric aggregate sensor bodies are telecommunicationally connected with a detection equipment body, the detection equipment body is internally provided with a signal processing module and a wireless communication module, and the detection equipment body is telecommunicationally connected with the plurality of piezoelectric aggregate sensor bodies.

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