Array type displacement water level detection device

Abstract

The utility model relates to an array type displacement water level detection device which comprises two or more sensor assemblies arranged in series, a power supply cable, a CAN bus and a water level detection device. Each of the more than two sensor assemblies comprises a shell and an acceleration sensor; every two adjacent shells are connected through the corresponding universal joint assembly, and the acceleration sensors are arranged in the shells. More than two acceleration sensors are connected in series through a power supply cable; the more than two acceleration sensors are connected in series through a CAN bus and are suitable for transmitting data acquired by the more than two acceleration sensors; the water level detection device is arranged at the bottom of the tail section of the sensor assembly and electrically connected with the power supply cable and the CAN bus. A data processing unit, a power conversion unit, a CAN communication unit and an external communication unit are arranged in the shell of the first section of the sensor assembly; the input end of the data processing unit is electrically connected with the output end of the CAN bus through the CAN communication unit, and the output end of the power conversion unit is electrically connected with the input end of the power supply cable.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of engineering detection and measurement, and particularly relates to an array displacement water level detection device. BACKGROUND

[0002] In many practical engineering application scenarios such as geotechnical engineering and geological disaster monitoring, in order to comprehensively and accurately obtain underground information and ensure the safety and stability of the engineering, two monitoring devices of array displacement meter and water level meter are often installed in the same borehole at the same time; however, due to the narrow space of the engineering borehole, the wiring work of the water level meter is difficult for the installation personnel to perform in the limited space, which increases the installation difficulty of the water level meter. SUMMARY

[0003] Therefore, the present application provides an array displacement water level detection device, which comprises: two or more sensor assemblies arranged in series, a power cable, a CAN bus and a water level detection device.

[0004] The two or more sensor assemblies each comprise: a shell and an acceleration sensor.

[0005] Each two adjacent shells are connected through a universal joint assembly, and the acceleration sensor is arranged in the shell.

[0006] The two or more acceleration sensors are connected in series through the power cable.

[0007] The two or more acceleration sensors are connected in series through the CAN bus, and are suitable for transmitting the data collected by the two or more acceleration sensors.

[0008] The water level detection device is arranged at the bottom of the tail section of the sensor assembly and is electrically connected with the power cable and the CAN bus respectively.

[0009] The shell of the head section of the sensor assembly is provided with a data processing unit, a power conversion unit, a CAN communication unit and an external communication unit.

[0010] The input end of the data processing unit is electrically connected with the output end of the CAN bus through the CAN communication unit, and the output end of the power conversion unit is electrically connected with the input end of the power cable.

[0011] In a possible implementation, the universal joint assembly comprises: a flexible pipe and a joint; one end of the joint is embedded in the shell, and the other end of the joint away from the shell is embedded in the flexible pipe.

[0012] In a possible implementation, the water level detection device comprises: a protective cabin, a mounting piece and a pressure sensor; one end of the protective cabin is connected with the shell of the tail section of the sensor assembly, and the other end of the protective cabin is connected with the mounting piece; the pressure sensor is fixedly installed on the mounting piece and one end of the pressure sensor penetrates into the cavity of the protective cabin.

[0013] In one possible implementation, a fixing section is also included; the fixing section is fixedly connected to the first section of the sensor assembly, and the fixing section has a cable channel so that a cable for an external power supply passes through the cable channel and connects to the input terminal of the power conversion unit.

[0014] In one possible implementation, a repeater is also included; the repeater is positioned on the CAN bus and is suitable for extending the load capacity of the CAN bus.

[0015] In one possible implementation, there are two or more repeaters; the two or more repeaters are spaced apart.

[0016] Beneficial effects of this application

[0017] Compared with existing technologies that install water level gauges separately, this application integrates the water level detection device into the bottom of the sensor assembly's tail section housing. The water level detection device can share the CAN bus and power supply cable with the sensor assembly, thereby avoiding the need to lay separate cables for the water level gauge. This reduces the number of cables and the space occupied by the device, improves space utilization, and lowers the equipment installation cost. The design of placing the water level detection device at the bottom of the sensor assembly eliminates the need for installers to perform complex wiring work in a limited space, reducing the operational difficulty of the water level detection device installation process, shortening the equipment installation time, and improving construction efficiency.

[0018] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0020] Figure 1 This diagram shows the main structure of the array-type displacement water level detection device of this application;

[0021] Figure 2 This paper shows a circuit diagram of the array-type displacement water level detection device of this application;

[0022] Figure 3 The main structural diagram of the universal joint assembly is shown;

[0023] Figure 4 A cross-sectional view of the water level detection device is shown.

[0024] Figure 5 The circuit diagram of the repeater is shown.

[0025] Sensor assembly—100; Universal joint assembly—200; Flexible tube—210; Connector—220; Pressure ring—230; Water level detection device—300; Protective chamber—310; Mounting component—320; Pressure sensor—330; Fixed joint—400. Detailed Implementation

[0026] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0027] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0030] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0031] This application proposes an array-type displacement water level detection device, such as... Figures 1 to 5As shown, the system includes: two or more sensor assemblies 100 connected in series, power supply cables, a CAN bus, and a water level detection device 300. Each of the two or more sensor assemblies 100 includes: a housing and an acceleration sensor. Each pair of adjacent housings is connected by a universal joint assembly 200, and the acceleration sensor is disposed inside the housing. The two or more acceleration sensors are connected in series via the power supply cable. The two or more acceleration sensors are connected in series via the CAN bus, which is suitable for transmitting data collected by the two or more acceleration sensors. The water level detection device 300 is disposed at the bottom of the tail section of the sensor assembly 100 and is electrically connected to the power supply cable and the CAN bus respectively. The housing of the first section of the sensor assembly 100 is provided with a data processing unit, a power conversion unit, a CAN communication unit, and an external communication unit. The input end of the data processing unit is electrically connected to the output end of the CAN bus, the data processing unit is electrically connected to the external communication unit, and the output end of the power conversion unit is electrically connected to the input end of the power supply cable.

[0032] It should be noted that the housing has a hollow cylindrical structure, and the accelerometer sensor is installed inside the cavity of the housing. The housing is designed to provide a stable working environment for the accelerometer sensor. Adjacent housings are connected by a universal joint assembly 200, allowing the sensor assembly 100 to adapt to different shapes and angles within the borehole, improving the adaptability and flexibility of the displacement and water level detection device 300. The accelerometer sensor is used to collect acceleration change information caused by factors such as rock and soil displacement at different locations within the borehole. The power supply cable is used to provide power to the series-connected accelerometer sensor and water level detection device 300, ensuring their normal operation. The series power supply method reduces the amount of power supply cable used, saving space. The CAN bus is used to transmit data collected by multiple accelerometer sensors. The water level detection device 300 is used to detect water level changes and transmit the data via the CAN bus. The data processing unit is used to receive the data collected by the accelerometer sensor and water level detection device 300 transmitted via the CAN bus and to process and analyze the received data. The CAN communication unit is used to ensure that the data collected by the accelerometer sensor and water level detection device 300 can be transmitted via the CAN bus. The bus accurately and reliably transmits data to the data processing unit. The external communication unit is suitable for connecting to external devices, thereby transmitting the data processed by the data processing unit to the external devices for storage or use.

[0033] In use, the sensor assembly 100 is fixed to the wall at the corresponding position in the engineering body. The flexibility of the universal joint assembly 200 is used to bend it, so that each section of the shell is attached to the wall of the engineering body at the corresponding angle. The water level detection device 300 transmits the detected water level information to the data processing unit through the CAN bus. When the engineering body vibrates or deforms, the shell will move accordingly. The accelerometer detects the displacement of the sensor assembly 100 and transmits it to the data processing unit in the first section of the sensor assembly 100 through the CAN bus. The data processing unit processes and analyzes the received data and sends the analysis results to external devices for storage and use through the external communication unit.

[0034] Compared with the existing technology of installing water level gauges separately, this application installs the water level detection device 300 at the bottom of the tail section of the sensor assembly 100. The water level detection device 300 can share the CAN bus and power supply cable with the sensor assembly 100, thereby avoiding the need to lay cables separately for the water level gauge. This reduces the number of cables and the space occupied by the equipment, improves space utilization, and reduces equipment installation costs. The design of placing the water level detection device 300 at the bottom of the sensor assembly 100 eliminates the need for installers to perform complex wiring work in a limited space, reduces the operational difficulty of the water level detection device 300 installation process, shortens the equipment installation time, and improves construction efficiency.

[0035] Furthermore, the housing is made of stainless steel tubing, the data processing unit uses the STM32L431CCT6 data processing chip (existing technology), the power conversion unit uses the TPS54062 power conversion chip (existing technology), the CAN communication unit uses the VP230 CAN communication chip (existing technology), and the external communication unit 9 uses the RS485 communication module (existing technology).

[0036] In one possible implementation, the accelerometer is a high-precision triaxial MEMS accelerometer; preferably, the accelerometer is an ADXL355 model accelerometer.

[0037] In one possible implementation, such as Figure 3As shown, the universal joint assembly 200 includes: a flexible tube 210 and a connector 220; one end of the connector 220 is embedded in the housing, and the other end of the connector 220, away from the housing, is embedded in the flexible tube 210. It should be noted that the power supply cable and CAN bus pass through the flexible tube 210 and connect to the sensors inside the housing. The flexible tube 210 has good flexibility and can be bent and deformed to a certain extent, allowing the sensor assembly 100 to change the relative positions of adjacent sensors according to the space inside the borehole during use. The connector 220 connects the housing of the sensor assembly 100 and the flexible tube 210 together to form a whole, preventing loosening or separation between the flexible tube 210 and the housing, and ensuring the sealing and integrity of the overall device.

[0038] Furthermore, both ends of the flexible tube 210 are provided with pressure rings 230. After the flexible tube 210 is connected to the connector 220, the pressure rings 230 can apply uniform pressure to the flexible tube 210 and the connector 220, so that the gap at the connection between the flexible tube 210 and the connector 220 is effectively sealed, further ensuring the stable connection between the flexible tube 210 and the connector 220.

[0039] In one possible implementation, such as Figure 4 As shown, the water level detection device 300 includes: a protective chamber 310, a mounting component 320, and a pressure sensor 330; one end of the protective chamber 310 is connected to the housing of the tail section of the sensor assembly 100, and the other end of the protective chamber 310 is connected to the mounting component 320; the pressure sensor 330 is fixedly mounted on the mounting component 320 and one end extends into the cavity of the protective chamber 310.

[0040] It should be noted that the protective chamber 310 has a cavity with openings at both ends. The side of the protective chamber 310 connected to the housing has an external thread, and the bottom of the housing of the tail section of the sensor assembly 100 has an internal thread. The protective chamber 310 is threadedly connected to the housing of the tail section of the sensor assembly 100 and communicates with the cavity of the housing of the tail section of the sensor assembly 100. The pressure sensor 330 is fixedly installed at one end of the mounting member 320. The mounting member has an external thread, and the end of the protective chamber 310 away from the sensor assembly 100 has an internal thread that matches the mounting member. When the mounting member is threadedly connected to the protective chamber 310, the pressure sensor penetrates into the cavity of the protective chamber 310, and the power supply cable and CAN bus inside the housing of the tail section of the sensor assembly 100 extend into the protective chamber 310 and are electrically connected to the pressure sensor 330.

[0041] Furthermore, the pressure sensor 330 uses a diffused silicon pressure core. It's important to note that the diffused silicon pressure core operates based on the piezoresistive effect. When subjected to water pressure, the resistance of the silicon wafer changes. By accurately measuring this resistance change, water pressure can be detected with high precision. Since there is a clear physical relationship between water pressure and water level, the measured water pressure can be accurately converted to water level through calculation. Moreover, the diffused silicon pressure core has a relatively simple and robust internal structure, making it less susceptible to external environmental factors. This ensures the accuracy and reliability of water level data during long-term monitoring, reducing the maintenance costs of the water level gauge.

[0042] Specifically, the mapping relationship between water pressure and water level is as follows:

[0043] Water pressure = ρ g h represents the water level; where ρ is the water density, g is the gravitational acceleration, and h is the water level. It should be noted that ρ, the water density, is usually a known constant. Under standard atmospheric pressure and normal temperature (4℃), the density of water ρ = 1000 kg / m³, and the gravitational acceleration g is relatively stable near the Earth's surface, generally taken as g = 9.8 m / s². The data processing unit receives the water pressure data detected by the water level detection device 300 and calculates the water level data according to the mapping formula between water pressure and water level.

[0044] Furthermore, the diffused silicon pressure core can also measure the water temperature. In practical applications, water temperature can affect water density. By measuring the water temperature using the diffused silicon pressure core, the data processing unit performs temperature compensation on the water level measurement data based on the measured water temperature data, thereby eliminating the influence of temperature on water level measurement and further improving the accuracy of water level measurement. Specifically, the data processing unit obtains the accurate water density value ρ at the current water temperature by consulting a pre-stored water density-temperature relationship table based on the received temperature data detected by the diffused silicon pressure core. The water density-temperature relationship table is common knowledge and will not be elaborated here.

[0045] In one possible implementation, a fixing section 400 is also included. The fixing section 400 is fixedly connected to the first section of the sensor assembly 100. The fixing section 400 has a cable channel so that the cable of the external power supply passes through the cable channel and connects to the input terminal of the power conversion unit. It should be noted that the fixing section 400 is fixedly installed on the rock wall, thereby providing a stable starting fixing point for the displacement water level detection device 300. The fixing section 400 is fixedly connected to the first section of the sensor assembly 100 through the universal joint assembly 200. The cable channel design allows the cable of the external power supply to pass through the fixing section 400 in an orderly manner and connect to the input terminal of the power conversion unit, avoiding the cable from becoming tangled during installation and improving installation efficiency.

[0046] One possible implementation also includes a repeater; the repeater is positioned on the CAN bus and located within the housing, suitable for extending the load capacity of the CAN bus. It should be noted that since the carrying capacity of the CAN bus is not unlimited, the use of the traditional CAN bus is limited for applications requiring dense sensor deployment or ultra-long distances. Therefore, when long-distance detection is required, setting up a repeater to increase the load capacity of the CAN bus allows for the expansion of the number of sensor nodes, thereby meeting the needs of longer application scenarios.

[0047] Furthermore, there are two or more repeaters; the two or more repeaters are spaced apart. It should be noted that the arrangement of multiple repeaters at intervals makes the displacement water level detection device 300 more flexible and scalable in application scenarios of different lengths. The staff can flexibly adjust the number of sensor components 100 and the position of repeaters according to actual monitoring needs to ensure that the displacement water level detection device 300 can adapt to various complex engineering environments and detection requirements.

[0048] Preferably, the CAN bus has a carrying capacity of 120, with a repeater set every 100 to 120 sensor components 100.

[0049] In one possible implementation, the repeater employs a CAN repeater from the prior art.

[0050] In one possible implementation, such as Figure 5 As shown, the repeater includes bus control module A and bus control module B. Both bus control module A and bus control module B include: transceivers, AND gates, and OR gates. The Tx and Rx pins of the two CAN transceivers are interconnected, and the AND and OR gates are cross-connected in parallel on the serial ports of the CAN transceivers. When the repeater is working, it utilizes the transmit and receive signal characteristics of the transceivers. When the transceiver's Tx pin sends data, the OR and AND gates prevent the data received by the Rx pin from being retransmitted to the CAN bus, avoiding data storms on the bus. This enables zero-delay transmission and reception between the two CAN bus structures, thereby improving communication efficiency and reducing costs.

[0051] Preferably, the transceiver uses the existing technology model SN65HVD230CAN transceiver chip; the AND gate circuit uses the existing technology model SN74LVC1G00 general logic gate chip; and the OR gate circuit uses the existing technology model U75H32 logic gate chip.

[0052] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An array-type displacement water level detection device, characterized in that, include: Two or more sensor components connected in series, power supply cables, CAN bus, and water level detection device; Each of the two or more of the aforementioned sensor assemblies includes: a housing and an accelerometer; Each pair of adjacent housings is connected by a universal joint assembly, and the acceleration sensor is disposed inside the housing; Two or more of the aforementioned accelerometers are connected in series via the power supply cable; Two or more acceleration sensors are connected in series via the CAN bus, which is suitable for transmitting data collected by the two or more acceleration sensors. The water level detection device is located at the bottom of the tail section of the sensor assembly and is electrically connected to the power supply cable and the CAN bus, respectively. The sensor assembly's first section contains a data processing unit, a power conversion unit, a CAN communication unit, and an external communication unit within its housing. The input terminal of the data processing unit is electrically connected to the output terminal of the CAN bus through the CAN communication unit, and the output terminal of the power conversion unit is electrically connected to the input terminal of the power supply cable.

2. The array-type displacement water level detection device according to claim 1, characterized in that, The universal joint assembly includes: a flexible tube and a connector; One end of the connector is embedded in the housing, and the other end of the connector away from the housing is embedded in the flexible tube.

3. The array-type displacement water level detection device according to claim 1, characterized in that, The water level detection device includes: a protective chamber, mounting components, and a pressure sensor; One end of the protective cabin is connected to the housing of the tail section of the sensor assembly, and the other end of the protective cabin is connected to the mounting component; The pressure sensor is fixedly mounted on the mounting component, with one end extending into the cavity of the protective chamber.

4. The array-type displacement water level detection device according to claim 1, characterized in that, It also includes a fixed section; The fixed section is fixedly connected to the first section of the sensor assembly. The fixed section has a cable channel so that the cable of the external power supply passes through the cable channel and is connected to the input terminal of the power conversion unit.

5. The array-type displacement water level detection device according to claim 1, characterized in that, It also includes repeaters; The repeater is installed on the CAN bus and is suitable for extending the load capacity of the CAN bus.

6. The array-type displacement water level detection device according to claim 5, characterized in that, The repeater is provided in two or more parts; Two or more repeaters are spaced apart.

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