Multidirectional wireless soil pressure device

Abstract

The utility model discloses a multidirectional wireless soil pressure device, which is of a cubic structure and comprises a supporting shell, an upper cover and a control circuit board, and the upper cover and the control circuit board are connected with the supporting shell. A soil pressure sensor is mounted on the supporting shell; the control circuit board comprises a controller, a memory card slot, a sensor wiring port and a battery; the battery is used for providing a working power supply; the sensor wiring port is used for connecting the soil pressure sensor and the control circuit board; the memory card slot is used for placing a memory card; and the controller is used for acquiring a pressure electric signal acquired by the soil pressure sensor and storing the pressure electric signal in the memory card. According to the multidirectional wireless soil pressure device provided by the utility model, a data line is omitted, the influence of the data line on a test result is avoided, a memory card is used for recording data, the placement of the soil pressure device is simplified, the efficiency of the arrangement and measurement process of the soil pressure device is improved, and the portability is improved.

Description

Technical Field

[0001] The utility model relates to the field of soil pressure measurement, in particular to a multi-directional wireless soil pressure device. Background Art

[0002] At present, when it is necessary to measure soil pressure in indoor or field test projects such as civil engineering, wired unidirectional soil pressure devices or wired multi-directional soil pressure devices are generally used. Wired soil pressure sensors use data cables to connect data acquisition instruments and further realize data transmission. The use of wired soil pressure devices will have many problems in the layout of soil pressure devices:

[0003] (1) Wired earth pressure sensors are not easy to carry;

[0004] (2) It is difficult to place the wired soil pressure sensor manually, because there are usually four data cables and a cylindrical colloid protective shell with an outer diameter of 0.5 cm. It is necessary to arrange the cables and other tasks, and the placement process may also interfere with the experiment.

[0005] (3) After placement, the wired earth pressure sensor may be unstable, which may lead to the rotation of the earth pressure sensor before or during the test, thus causing inaccurate experimental data.

[0006] (4) In model tests where the similarity between the prototype and the model is relatively small, the data line of the earth pressure sensor will affect the test results;

[0007] (5) The wired earth pressure device has certain requirements for the surrounding environment when recording measurement data. If you are not careful, the sensor may be damaged due to factors such as water entering the data cable or the data cable being crushed. Summary of the invention

[0008] Aiming at the deficiencies of the prior art, the utility model discloses a multi-directional wireless earth pressure device.

[0009] To achieve the above technical objectives, the technical solution of the utility model is a multi-directional wireless earth pressure device, which is a cubic structure, including a supporting shell and an upper cover and a control circuit board connected thereto; an earth pressure sensor is installed on the supporting shell; the control circuit board includes a controller, a memory card slot, a sensor wiring port, and a battery; the battery is used to provide working power; the sensor wiring port is used to connect the earth pressure sensor and the control circuit board; the memory card slot is used to place a memory card; the controller is used to obtain the pressure electrical signal collected by the earth pressure sensor and store it in the memory card.

[0010] Furthermore, the soil pressure sensor is installed in a groove of the supporting shell, and an soil pressure sensor can be installed on each side surface and bottom surface of the supporting shell.

[0011] Furthermore, the soil pressure sensor is a strain gauge, piezoresistive, capacitive, piezoelectric, or vibration frequency pressure sensor.

[0012] Furthermore, the upper cover also has an upper cover limiting opening, which is connected to an external rod through the upper cover limiting opening, and the multi-directional wireless earth pressure device is placed at a position to be measured through the external rod.

[0013] Furthermore, a protective cover connected to the supporting shell is provided between the upper cover and the supporting shell, and the protective cover is provided with a switch, a charging port, a circular opening, and a card slot; the position of the card slot corresponds to the position of the memory card slot.

[0014] Furthermore, the control circuit board also includes a temperature sensing module, which uses a laser temperature sensor to monitor the temperature of the upper cover after the laser passes through the circular opening, and provides the upper cover temperature to the controller to facilitate temperature compensation of soil pressure and record ambient temperature.

[0015] Furthermore, the control circuit board also includes an alarm, which triggers an alarm signal when the soil pressure reaches a preset threshold.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The multi-directional wireless earth pressure device provided by the utility model eliminates the need for data cables, thereby avoiding the influence of the data cables on the test results, using a memory card to record data, simplifying the placement of the earth pressure device, improving the efficiency of the arrangement and measurement process of the earth pressure device, and improving portability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is an overall diagram of the multi-directional wireless earth pressure device;

[0020] Figure 2 It is a front view / side view of a multi-directional wireless earth pressure device;

[0021] Figure 3 It is a top view of the multi-directional wireless earth pressure device;

[0022] Figure 4 It is a cross-sectional view of a multi-directional wireless earth pressure device;

[0023] Figure 5 is a top view of the protective cover;

[0024] Figure 6 This is the structural diagram of the control circuit board;

[0025] Figure 7 is a schematic block diagram of a control circuit board;

[0026] Figure 8 It is the relationship diagram between temperature and calibration coefficient of earth pressure sensor;

[0027] In the figure, 1. soil pressure sensor; 2. supporting shell; 3. control circuit board; 4. upper cover; 5. switch; 6. memory card slot; 7. charging port; 8. upper cover limit port; 9. thread; 10. card slot; 11. wire passing port; 12. controller; 13. alarm; 14. temperature sensing module; 15. sensor wiring port; 16. voltage regulator module; 17. circular opening; 18. protective cover; 19. battery. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that, in the absence of conflict, the features in the following embodiments and implementations may be combined with each other.

[0030] like Figure 1 and Figure 2 As shown, an embodiment of the utility model provides a multi-directional wireless earth pressure device, which is a cubic structure, including a supporting shell 2 and an upper cover 4 connected thereto, and a control circuit board 3; an earth pressure sensor 1 is installed on the supporting shell 2; the control circuit board 3 includes a controller 12, a memory card slot 6, a sensor wiring port 15, and a battery 19; the battery 19 is used to provide working power for the controller 12, the earth pressure sensor 1 and other equipment; the sensor wiring port 15 is used to connect the earth pressure sensor 1 and the control circuit board 3; the memory card slot 6 is used to place a memory card; the controller 12 is used to obtain the pressure electrical signal collected by the earth pressure sensor 1 and store it in the memory card.

[0031] Furthermore, if Figure 3As shown, the soil pressure sensor 1 is installed in the groove of the supporting shell 2, and each side and bottom of the supporting shell 2 can be installed with a soil pressure sensor 1, so that a multi-directional wireless soil pressure device can be installed with up to 5 soil pressure sensors 1. At the same time, the grooves of the supporting shell 2 can be reduced during manufacturing to reduce the number of soil pressure sensors 1 to meet the needs of different application scenarios. Furthermore, the soil pressure sensor 1 can be selected and replaced according to specific needs, including but not limited to strain type, piezoresistive type, capacitive type, piezoelectric type, vibration frequency type pressure sensor, etc.

[0032] Furthermore, if Figure 4 As shown, the upper cover 4 is also provided with an upper cover limiting opening 8, which is connected to an external rod through the upper cover limiting opening 8, so that the multi-directional wireless earth pressure device is placed at the position to be measured.

[0033] Furthermore, if Figure 5 As shown, a protective cover connected to the supporting shell 2 is also provided between the upper cover 4 and the supporting shell 2, and a switch 5 is provided on the protective cover, and a charging port 7, a circular opening 17, and a card slot 10 are provided. The position of the card slot 10 corresponds to the position of the memory card slot 6. A thread 9 is provided on the protective cover 4, and the protective cover 4 is connected to the supporting shell 2 through the thread 9. In this example, a protective cover is added to the supporting shell 2 to protect the memory card slot, switch and charging port to prevent environmental factors such as dust and moisture from damaging the device. The circular opening on the supporting shell provides temperature measurement conditions for the temperature sensing module, so that the temperature sensing system can accurately monitor the ambient temperature. The supporting shell plays a supporting and protective role. The main central structure is fixed inside, and a protective shell is provided for the central structure. The soil pressure sensor is fixed outside and connected to the upper cover to form a whole.

[0034] Furthermore, if Figure 6 and Figure 7 As shown, the battery 19 in the control circuit board 3 provides power to the control circuit board 3 after being stabilized by the voltage stabilizing module 16. The control circuit board 3 also includes a temperature sensing module 14, which uses a laser temperature sensor to monitor the temperature of the upper cover after the laser passes through the circular opening 17. It is considered that the heat transfer between the upper cover and the soil is fast, and the upper cover temperature is provided to the controller 12, which is convenient for temperature compensation of soil pressure and recording of ambient temperature. The control circuit board 3 also includes an alarm, which will generate a beeping alarm when the soil pressure reaches a certain threshold and trigger an alarm signal, which can promptly remind the user to take corresponding measures to ensure the safety of the equipment.

[0035] Next, the working process of a multi-directional wireless earth pressure device provided by the utility model is described:

[0036] When in use, unscrew the upper cover 4 from the supporting shell 2, insert the corresponding memory card into the memory card slot 6, and turn on the instrument switch 5. Screw on the upper cover 4, and place the soil pressure device in the corresponding position in the soil body for data recording. The placement of the soil pressure device can be facilitated by connecting the external rod through the upper cover limit opening 8. After turning on the instrument switch 5, the corresponding soil pressure sensor 1 starts to measure the corresponding soil pressure value and transmits it to the controller 12 through the data line. At the same time, the temperature sensing module 14 monitors the ambient temperature through the circular opening 17 on the supporting shell 2, and transmits the result to the controller 12. After the soil pressure value and the temperature value are processed and calculated by the controller 12, they are written into the external memory card through the memory card slot 6 to complete the data recording. While recording the data, the controller 12 will also control the working state of the alarm 13 according to the real-time soil pressure value. After the experiment is over, take out the soil pressure device, open the upper cover 4 to turn off the instrument switch 5, take out the memory card, and use the relevant instrument to read the data in the memory card. In order to ensure the distinguishability of the data, this example requires that the switch must be turned on and off every time data is recorded. This means that each time the switch is turned on and off, the process is considered as a complete data record. This can clearly distinguish the data from different experiments and ensure the accuracy and reliability of the data.

[0037] Regarding the temperature compensation method during the test, it is necessary to conduct a temperature test experiment on the soil pressure sensor before the test begins to obtain raw data, which includes multiple groups of data, each group of data including temperature and the calibration coefficient of the soil pressure sensor under temperature conditions. In this embodiment, a temperature test experiment is conducted on a soil pressure sensor, mainly by using a liquid calibration and controlling the water temperature to determine the calibration coefficient of each soil pressure sensor under different temperature conditions ( k Value), see Table 1. After obtaining the calibration coefficient of the earth pressure sensor under different temperature conditions ( k After analyzing the relationship between it and temperature, we can get the relationship between temperature and k The relationship between the values ​​( Figure 8 ), and the relationship is entered into the controller 12. In the temperature compensation process, the actual temperature of the soil near the earth pressure device is collected, and the controller 12 automatically obtains the temperature and k The relationship between the values ​​can be used to obtain the accurate calibration coefficient of the earth pressure sensor at this temperature and output the calculation.

[0038] Table 1 Calibration coefficients of earth pressure sensors under different temperature conditions ( k Value) table

[0039]

[0040] It should be noted that the multi-directional wireless earth pressure device provided by the utility model eliminates the data line, thus avoiding the influence of the data line on the test results, and uses a memory card to record data, which simplifies the placement of the earth pressure device, improves the efficiency of the arrangement and measurement process of the earth pressure device, and improves portability. The earth pressure device is provided with a temperature sensing module. When the earth pressure sensor measures the earth pressure, the temperature sensor measures the temperature of the surrounding soil and transmits the data to the controller. According to the earth pressure values ​​at different temperatures calibrated in advance, the controller can make temperature compensation calculations for the earth pressure according to the real-time temperature, and then write the calculation results and the real-time temperature into the memory card at the same time, thereby realizing the temperature compensation calculation of the earth pressure.

[0041] Those skilled in the art will readily appreciate other embodiments of the present application after considering the description and practicing the contents disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary technical means in the art that are not disclosed in the present application. The description and examples are intended to be exemplary only.

[0042] It should be understood that the present application is not limited to the exact construction that has been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof.

Claims

1. A multi-directional wireless earth pressure device, characterized in that: The device is a cubic structure, comprising a supporting shell (2), an upper cover (4) connected thereto, and a control circuit board (3); an earth pressure sensor (1) is mounted on the supporting shell (2); the control circuit board (3) comprises a controller (12), a memory card slot (6), a sensor wiring port (15), and a battery (19); the battery (19) is used to provide a working power supply; the sensor wiring port (15) is used to connect the earth pressure sensor (1) and the control circuit board (3); the memory card slot (6) is used to place a memory card; the controller (12) is used to obtain a pressure electrical signal collected by the earth pressure sensor (1) and store it in a memory card.

2. A multi-directional wireless earth pressure device according to claim 1, characterized in that: The soil pressure sensor (1) is installed in a groove of the supporting shell (2), and one soil pressure sensor (1) can be installed on each side surface and bottom surface of the supporting shell (2).

3. A multi-directional wireless earth pressure device according to claim 1 or 2, characterized in that: The soil pressure sensor (1) is selected from strain type, piezoresistive type, capacitive type, piezoelectric type, and vibration frequency type pressure sensors.

4. A multi-directional wireless earth pressure device according to claim 1, characterized in that: The upper cover (4) also has an upper cover limit opening (8), which is connected to an external rod through the upper cover limit opening (8), and the multi-directional wireless earth pressure device is placed at a position to be measured through the external rod.

5. A multi-directional wireless earth pressure device according to claim 1, characterized in that: A protective cover connected to the supporting shell (2) is also provided between the upper cover (4) and the supporting shell (2); the protective cover is provided with a switch (5), a charging port (7), a circular opening (17), and a card slot (10); the position of the card slot (10) corresponds to the position of the memory card slot (6).

6. A multi-directional wireless earth pressure device according to claim 1 or 5, characterized in that: The control circuit board (3) further comprises a temperature sensing module (14), wherein the temperature sensing module (14) adopts a laser temperature sensor, monitors the temperature of the upper cover after the laser passes through the circular opening (17), and provides the upper cover temperature to the controller (12), thereby facilitating temperature compensation of soil pressure and recording of ambient temperature.

7. A multi-directional wireless earth pressure device according to claim 1, characterized in that: The control circuit board (3) also includes an alarm, which triggers an alarm signal when the soil pressure reaches a preset threshold value.

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