A device for monitoring displacement of a slope crack
By introducing an absolute encoder and a MEMS accelerometer into the slope crack displacement monitoring device, multi-parameter collaborative judgment is achieved, solving the problem of false alarms in abnormal environments of traditional devices and improving the accuracy and reliability of monitoring.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI FASHION TECH
- Filing Date
- 2025-10-23
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional slope crack displacement monitoring devices are prone to false alarms during thunderstorms or electromagnetic interference, and the high false alarm rate is caused by relying on a single parameter.
An absolute encoder is used to assist in the judgment, combined with a wire displacement sensor and a MEMS accelerometer. Through multi-parameter collaborative judgment, an early warning is triggered only when the data of all three exceed the limit.
It reduces the false alarm rate, improves the accuracy and reliability of monitoring, and ensures that no false alarms occur under abnormal conditions.
Smart Images
Figure CN224535002U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of infrastructure safety monitoring technology, specifically a slope crack displacement monitoring device. Background Technology
[0002] The slope crack displacement monitoring device is used in scenarios such as geological disasters, slopes, and bridges where displacement deformation needs to be monitored. Traditional slope and geological disaster monitoring uses a pull-wire displacement gauge to monitor crack changes. By fixing pull-wire sensors at the upper and lower parts of the landslide body, the change in the crack opening causes the pull wire (steel wire rope) to extend and retract, thereby causing the internal potentiometer to rotate. By measuring the resistance of the potentiometer, the corresponding displacement change can be obtained. After obtaining the crack change value, the data is transmitted and reported through the subsequent acquisition and transmission circuit.
[0003] The traditional method of using a single pull rope to drive an internal potentiometer to collect displacement data, determine whether a threshold has been exceeded, and trigger early warning monitoring has the problem of false alarms. For example, in the event of thunderstorms, electromagnetic interference, or abnormal waterproofing and insulation of the equipment, the potentiometer may collect short-term and temporary abnormal data, such as sudden changes, jittering, or glitches, causing abnormal data collection and thus generating false alarms. Moreover, the traditional method relies on a single parameter for judgment, triggering an alarm when the limit is exceeded, which causes inconvenience to on-site residents, operation and maintenance personnel, and management units. Utility Model Content
[0004] The purpose of this invention is to provide a slope crack displacement monitoring device that uses an absolute encoder for auxiliary judgment, thereby solving the false alarm problem of traditional devices that rely on a single parameter exceeding the limit for triggering an early warning, and thus addressing the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a slope crack displacement monitoring device, comprising a housing, wherein a control component, a wire displacement sensor body and an absolute encoder are installed inside the housing, and the wire displacement sensor body is connected to the absolute encoder via a steel wire rope; The steel wire rope is wound around the wheel of the absolute encoder, and one end of the steel wire rope passes through the outer shell and extends outward to be connected to the pull wire displacement fixing block.
[0006] Preferably, the control component includes a processor, a MEMS accelerometer, a 4G communication module, and a lithium battery, all of which are installed inside the housing.
[0007] Preferably, the processor is electrically connected to both the wire displacement sensor body and the absolute encoder. The processor is electrically connected to the MEMS accelerometer, the 4G communication module, and the lithium battery, respectively. The lithium battery is electrically connected to the processor, MEMS accelerometer, and 4G communication module, respectively.
[0008] Preferably, a warning device is installed at one end of the top of the housing, and the warning device is electrically connected to the main body of the wire displacement sensor, the absolute encoder and the MEMS accelerometer respectively.
[0009] Compared with the prior art, the beneficial effects of this utility model are: This invention provides a slope crack displacement monitoring device. By adding an absolute encoder for auxiliary judgment, it solves the false alarm problem of traditional devices that rely on a single parameter exceeding the limit for triggering an early warning. In this way, when an exceedance occurs, the slope crack displacement monitoring device reads the position information of the absolute encoder again to determine whether the wire rope is slipping. When the data of the absolute encoder, the main body of the guy wire displacement sensor, and the MEMS accelerometer all exceed the limit, it then links with the early warning device to issue an alarm signal. However, when the data of the main body of the guy wire displacement sensor (crack meter) is abnormal, but the data of the MEMS accelerometer and the absolute encoder are normal, the slope crack displacement monitoring device identifies it as false alarm data and does not trigger an early warning, thereby reducing the false alarm rate.
[0010] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a system framework diagram of the present invention; Figure 3 This is a system flowchart of the present invention.
[0012] The following are the labels in the diagram: 1. Wire rope; 2. Absolute encoder; 3. Main body of wire displacement sensor; 4. Control component; 41. Processor; 42. 4G communication module; 43. MEMS accelerometer; 44. Lithium battery; 5. Wire displacement fixing block; 6. Housing; 7. Early warning device. Detailed Implementation
[0013] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0014] This utility model provides, for example Figures 1-3 The slope crack displacement monitoring device shown includes a housing 6 and a control component 4. Inside the housing 6, the control component 4, the wire displacement sensor body 3 and the absolute encoder 2 are installed. The control component 4 and the wire displacement sensor body 3 are connected to the absolute encoder 2 through a steel wire rope 1. The slope crack displacement monitoring device uses the outer shell 6 as the basic load-bearing structure, integrating the core wire displacement sensor body 3, the absolute encoder 2, and the control component 4. When the slope crack displacement monitoring device is working, one end of the wire rope 1 is fixed to the upper end of the landslide body (installation and positioning are achieved through the wire displacement fixing block 5), and the other end is first wound around the wheel of the absolute encoder 2, and then connected to the inside of the wire displacement sensor body 3. When the slope crack causes displacement, resulting in relative movement of the landslide body, the wire rope 1 will extend or retract accordingly. This action simultaneously drives the two key components: First, the multi-turn potentiometer inside the main body 3 of the wire displacement sensor rotates, and its resistance change is linearly related to the length of the wire rope 1 pulled out, which can initially obtain displacement data. Second, the absolute encoder 2 rotates, and the absolute encoder 2 transmits position information to the processor 41 (GD32F103 series MCU) through the RS485 interface. At the same time, the MEMS accelerometer 43 (MMA8451Q) transmits slope attitude data to the processor 41 (MCU) through IIC communication. The MCU collects the displacement data of the multi-turn potentiometer and the attitude data of the MEMS accelerometer 43 in real time and compares them with the preset threshold. If the data exceeds the limit, the MCU further reads the position information of the encoder to determine whether the wire rope 1 is actually slipping. Only when the data of the wire displacement sensor body 3, the absolute encoder 2 and the MEMS accelerometer 43 all exceed the limit will the 4G communication module 42 (EC20) trigger the early warning linkage to realize multi-parameter collaborative judgment. The control component 4 has a steel wire rope 1 wound around the wheel of the absolute encoder 2. One end of the steel wire rope 1 of the control component 4 passes through the outer shell 6 and extends outward to be connected to the pull wire displacement fixing block 5. The control component 4 includes a processor 41, a MEMS accelerometer 43, a 4G communication module 42 and a lithium battery 44. The processor 41, MEMS accelerometer 43, 4G communication module 42 and lithium battery 44 of the control component 4 are all installed inside the outer shell 6. The composition and installation location of the control component 4 are clearly defined. The processor 41, MEMS accelerometer 43, 4G communication module 42, and lithium battery 44 included in the control component 4 are all integrated inside the housing 6. During operation, the lithium battery 44 provides stable power support to the processor 41, MEMS accelerometer 43, and 4G communication module 42 to ensure the continuous operation of each component. The MEMS accelerometer 43 collects slope attitude data (such as changes in tilt angle) in real time and transmits the data to the processor 41. The processor 41, as the core control unit, receives displacement data from the main body of the wire displacement sensor 3, position data from the absolute encoder 2, and attitude data from the MEMS accelerometer 43, performs comprehensive calculations and threshold comparisons. When it is determined that an early warning is required, the processor 41 remotely reports the monitoring data and early warning information to the management platform through the 4G communication module, forming a complete data processing link of power supply-acquisition-computation-transmission.
[0015] The control component 4 processor 41 is electrically connected to the wire displacement sensor body 3 and the absolute encoder 2 respectively; The control component 4 processor 41 is electrically connected to the MEMS accelerometer 43, the 4G communication module 42 and the lithium battery 44 respectively; The control component 4 and the lithium battery 44 are electrically connected to the processor 41, the MEMS accelerometer 43, and the 4G communication module 42, respectively. The signal interaction and control logic of each component are clearly defined through electrical connections. The processor 41 is electrically connected to the main body 3 of the wire displacement sensor and the absolute encoder 2, respectively, and can receive the displacement and position data collected by the two in real time. It can also send instructions to the absolute encoder 2 (such as "wake up on demand" to read position information). The processor 41 is electrically connected to the MEMS accelerometer 43, receives its attitude data and performs filtering and processing on the data. The processor 41 is electrically connected to the 4G communication module 42, and the control module realizes data reporting and instruction reception. The lithium battery 44 is electrically connected to the processor 41, the MEMS accelerometer 43 and the 4G communication module 42, respectively, to provide the appropriate voltage and current for each component. When the slope displacement triggers a change in data, the processor 41 first obtains the data from the main body 3 of the wire displacement sensor and the MEMS accelerometer 43 through electrical connections. If the data exceeds the limit, it immediately wakes up the absolute encoder 2 through electrical connections and reads the position data. After comprehensive judgment, it then controls the 4G communication module 42 to start an early warning through electrical connections, so as to realize the coordinated linkage of each component.
[0016] A warning device 7 is installed at one end of the top of the housing 6 of the control component 4. The warning device 7 of the control component 4 is electrically connected to the main body 3 of the wire displacement sensor, the absolute encoder 2 and the MEMS accelerometer 43 respectively. An early warning device 7 is added to one end of the top of the outer casing 6. The early warning device 7 is electrically connected to the main body of the wire displacement sensor 3, the absolute encoder 2, and the MEMS accelerometer 43. During operation, the early warning device 7 receives the raw data of the three core components or the judgment results of the processor 41 in real time through the electrical connection. When the displacement data of the main body of the wire displacement sensor 3, the position data of the absolute encoder 2, and the attitude data of the MEMS accelerometer 43 all exceed the preset threshold, the early warning device 7 immediately triggers a local early warning (such as an audible and visual alarm). If only the data of the main body of the wire displacement sensor 3 is abnormal, while the data of the absolute encoder 2 and the MEMS accelerometer 43 are normal, the early warning device 7 will not be activated. The local early warning and the remote reporting by the 4G communication module 42 form a dual early warning mechanism, which facilitates the on-site maintenance personnel to quickly detect risks and allows the remote management unit to keep abreast of the situation.
[0017] In practical use, an absolute encoder 2 is added for auxiliary judgment to solve the false alarm problem of traditional single-parameter over-limit triggering of warning. In this way, when an over-limit occurs, the slope crack displacement monitoring device reads the position information of the absolute encoder 2 again to determine whether the wire rope 1 is slipping. When the data of the absolute encoder 2, the main body of the guy wire displacement sensor 3, and the MEMS accelerometer 43 all exceed the limit, it is then linked with the warning device 7 to issue an alarm signal. However, when the data of the main body of the guy wire displacement sensor 3 (crack meter) is abnormal, but the data of the MEMS accelerometer 43 and the absolute encoder 2 are normal, the slope crack displacement monitoring device identifies it as false alarm data and does not trigger a warning, thereby reducing the false alarm rate.
[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A slope crack displacement monitoring device, characterized in that: Includes a housing (6), inside which a control component (4), a wire displacement sensor body (3) and an absolute encoder (2) are installed. The wire displacement sensor body (3) is connected to the absolute encoder (2) via a wire rope (1). The wire rope (1) is wound around the wheel of the absolute encoder (2), and one end of the wire rope (1) passes through the outer shell (6) and extends outward to be connected to the pull wire displacement fixing block (5).
2. The slope crack displacement monitoring device according to claim 1, characterized in that: The control component (4) includes a processor (41), a MEMS accelerometer (43), a 4G communication module (42), and a lithium battery (44), all of which are installed inside the housing (6).
3. The slope crack displacement monitoring device according to claim 2, characterized in that: The processor (41) is electrically connected to the main body (3) of the wire displacement sensor and the absolute encoder (2) respectively; The processor (41) is electrically connected to the MEMS accelerometer (43), the 4G communication module (42), and the lithium battery (44), respectively. The lithium battery (44) is electrically connected to the processor (41), the MEMS accelerometer (43), and the 4G communication module (42), respectively.
4. The slope crack displacement monitoring device according to claim 3, characterized in that: An early warning device (7) is installed at one end of the top of the housing (6). The early warning device (7) is electrically connected to the main body of the wire displacement sensor (3), the absolute encoder (2), and the MEMS accelerometer (43).