CN216695399U - Embedded type vacuum prepressing vacuum degree wireless measuring device - Google Patents
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- CN216695399U CN216695399U CN202123119471.9U CN202123119471U CN216695399U CN 216695399 U CN216695399 U CN 216695399U CN 202123119471 U CN202123119471 U CN 202123119471U CN 216695399 U CN216695399 U CN 216695399U
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Abstract
The utility model discloses an embedded type vacuum preloading vacuum degree wireless measuring device which comprises a cavity, a data acquisition module and a data transmission module, wherein the cavity is of a breathable and waterproof structure and is arranged in a sand cushion layer of a vacuum monitoring area, the data acquisition module is arranged in the cavity and is used for acquiring monitoring signals, and the data transmission module is connected with the data acquisition module and is used for wireless transmission of the signals. The structure of the cavity can prevent soil and water from only limiting gas to freely enter and exit the cavity, not only can protect circuit elements in the cavity, but also can form a stable vacuum pressure cavity, thereby truly and accurately measuring the vacuum degree under the sealing film. With the direct embedding vacuum sensor of data acquisition module, combine outside ventilative waterproof protective housing simultaneously, bury data acquisition module and vacuum sensor jointly and measure the vacuum under the sealed membrane to can realize long-range wireless control monitoring vacuum, be applicable to the vacuum monitoring under the large tracts of land is filled out and land is built by land vacuum preloading membrane.
Description
Technical Field
The utility model relates to the field of vacuum preloading vacuum degree measurement, in particular to an embedded type wireless vacuum preloading vacuum degree measurement device.
Background
Since the 80 s in the 20 th century, the vacuum preloading method for reinforcing the soft foundation is widely applied and researched in China, so that various vacuum preloading technologies and research results in China are in the international leading position. With the rapid development of economy in China, the demand of land resources of most coastal cities is increased rapidly, large-area sea reclamation becomes the best solution at present, and the development of the technology for treating soft foundations by using a vacuum preloading method is further promoted. On-site vacuum degree measurement, particularly under-sealing film vacuum degree measurement, is a key monitoring project in the vacuum preloading construction process, and has important significance on soil body preloading reinforcement effect, vacuum degree dissipation, soil body mechanism research of vacuum preloading reinforcement, sealing film sealing condition early warning and the like.
At present, in the domestic field of vacuum preloading, a pore pressure gauge is mostly embedded in a sand cushion layer for measuring the vacuum degree under the film; or the vacuum tube is embedded into the sand cushion layer and then led out to be connected to the vacuum meter, and the vacuum degree is read through the vacuum meter. However, when the soft soil layer is consolidated by vacuum preloading, a large amount of underground water can be pumped out to submerge the pore pressure gauge. When the pore pressure meter is used for measuring the vacuum degree under the membrane below the underground water level, the hyperstatic pore water pressure is directly measured, the hyperstatic pore water pressure is generally smaller than the vacuum degree value according to the research result, the hyperstatic pore water pressure and the vacuum degree value can be converted through an empirical formula, and the calculation error still exists. And the pore pressure gauge is embedded in the sand cushion layer, cannot be recycled, has high cost, and cannot be applied to a large-area sea filling land reclamation vacuum preloading method. The vacuum tube is embedded in the sand cushion layer, the vacuum degree measured by the vacuum meter is also influenced by the presence or absence of underground water in the tube, when no water exists in the vacuum tube, the reading of the vacuum meter reflects the real vacuum degree, and when water exists in the vacuum tube, the reading of the vacuum meter reflects the pore water pressure value.
At present, the Chinese patent with the application number of 201810967795.1 proposes that a vacuum probe wrapped by geotextile is embedded in a soil layer and is connected with a vacuum pressure gauge through a pressure pipe for measuring the vacuum degree. However, this solution has several drawbacks, and the vacuum degree under the film cannot be effectively measured. Firstly, the vacuum probe is wrapped by geotextile, and when the vacuum probe is pressed into a soil layer, the geotextile is possibly scratched and falls off due to abrasion. Secondly, the pressure pipe is buried in the soil layer, and the pressure pipe has the possibility of bending and blocking due to overlarge soil body compression amount. Thirdly, the structure of the vacuum probe can only obstruct the soil and cannot obstruct underground water, when the vacuum probe is arranged below the underground water level, the underground water can flow into the vacuum probe cavity to fill the vacuum probe cavity and obstruct the probe air holes, and the vacuum pressure gauge measures that the vacuum pressure is close to the hyperstatic pore water pressure but is not equal to the vacuum degree under the film, so that great error exists.
Meanwhile, the two technical methods for measuring the vacuum degree under the membrane both need manual data acquisition and recording, and the labor cost is high for the large-area sea filling and land reclamation vacuum preloading method. And when the seal membrane leaks, the problems can not be timely pre-warned and found, so that energy waste and economic loss are caused.
In view of the above, it is necessary to develop a wireless vacuum pre-pressure measuring device suitable for land reclamation and reclamation.
SUMMERY OF THE UTILITY MODEL
The technical problem mentioned above is addressed. An object of the embodiments of the present application is to provide an embedded vacuum preloading vacuum degree wireless measuring device to solve the technical problems mentioned in the above background.
The embodiment of the application provides an embedded type vacuum preloading vacuum degree wireless measuring device, which comprises a cavity, a data acquisition module and a data transmission module, wherein the cavity is of a breathable impermeable structure and is arranged in a sand cushion layer of a vacuum monitoring area, the data acquisition module is arranged in the cavity and is used for acquiring monitoring signals, the data transmission module is connected with the data acquisition module and is used for wireless transmission of the signals, the data acquisition module comprises a PCB (printed circuit board) and a vacuum degree sensor, an MCU (microprogrammed control unit) singlechip, a power module, a signal conversion module and a switch module which are arranged on the PCB, the output of the power module is connected with the MCU singlechip, the switch module is arranged between the power module and the MCU singlechip and controls the power module to be opened or closed through the switch module and the MCU singlechip, and the vacuum degree sensor is used for detecting the vacuum degree, the output of the vacuum degree sensor is connected with the input of the signal conversion module, the output of the signal conversion module is connected with the MCU singlechip, and serial port data are converted into IP data through the signal conversion module.
In some embodiments, the cavity comprises an inner shell, an outer shell and an intermediate layer arranged between the inner shell and the outer shell, wherein the inner shell and the outer shell are high-strength plastic layers, and the intermediate layer is a breathable waterproof film.
In some embodiments, a plurality of first openings are formed on the inner shell, a second opening corresponding to the first opening is formed on the outer shell, and a permeable stone is arranged at the second opening.
In some embodiments, the device further comprises an installation interface, one end of the installation interface is connected with the data acquisition module, the cavity is provided with a third opening, and the installation interface at the third opening is hermetically connected with the cavity.
In some embodiments, the data transmission module comprises a reserved signal interface, a waterproof data cable and a signal antenna, and data transmission is performed through the reserved signal interface in a network signal environment; under the environment without network signals, remote data transmission is realized through a waterproof data cable and a signal antenna, one end of the waterproof data cable is fixedly connected with the other end of the mounting interface and is connected with the data acquisition module through a flat cable plug, the other end of the waterproof data cable extends out of the ground to be connected with the signal antenna on the ground, and wireless transmission of signals is realized through the waterproof data cable and the signal antenna.
In some embodiments, the waterproof data cable is provided with a metal reinforcement liner.
In some embodiments, the waterproof data cable further comprises a steel pipe with a hollow inner part, the steel pipe is sleeved outside the waterproof data cable and connected with the outside of the cavity, and the inner diameter of the steel pipe is larger than the outer diameter of the waterproof data cable and smaller than the outer diameter of the cavity.
In some embodiments, the cavity is spherical in shape.
In some embodiments, the vacuum level sensor comprises a silicon pressure sensing chip.
Compared with the prior art, the utility model has the following beneficial effects:
(1) the utility model adopts a spherical cavity with a three-layer structure, wherein an outer shell and an inner shell of the cavity are made of GFRP fiber reinforced plastics, the outer shell and the inner shell are provided with holes, the outer shell is provided with a second hole, permeable stones are embedded into the second hole, a breathable and waterproof film is arranged between the outer shell and the inner shell of the cavity, the cavity structure can prevent soil and water from only limiting gas to freely flow into and out of the cavity, circuit elements in the cavity can be protected, a stable vacuum pressure cavity is formed, and therefore, the vacuum degree under a sealed film can be really and effectively measured.
(2) The utility model can realize remote wireless control and monitoring of vacuum degree, and is suitable for vacuum degree monitoring under vacuum preloading membrane for large-area land reclamation.
(3) The steel pipe with fixed specification is sleeved outside the waterproof data cable, the cavity is placed in soil layers with different depths, and the cavity can be accurately pressed into a soil body with the vacuum degree to be measured to measure the vacuum degree.
(4) According to the utility model, the data acquisition module is directly embedded into the vacuum degree sensor, and meanwhile, the external breathable waterproof protective shell is combined, the data acquisition module and the vacuum degree sensor are jointly embedded under the sealing film to measure the vacuum degree, the measuring equipment has a simple and convenient structure, is firm and durable, has a simple and easy installation and operation method, and is suitable for a beach high-corrosivity environment.
Drawings
The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and together with the description serve to explain the principles of the utility model. Other embodiments and many of the intended advantages of embodiments will be readily appreciated as they become better understood by reference to the following detailed description. The elements of the drawings are not necessarily to scale relative to each other. Like reference numerals designate corresponding similar parts.
FIG. 1 is a schematic diagram of an embedded vacuum preloading vacuum degree wireless measurement device according to the utility model;
FIG. 2 shows a schematic structural diagram of a cavity of the embedded vacuum preloading vacuum degree wireless measuring device according to the present invention;
fig. 3 shows a schematic structural diagram of a data acquisition module, a mounting interface and a waterproof data cable of the embedded vacuum preloading vacuum degree wireless measurement device according to the utility model.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the utility model. It should be noted that, for convenience of description, only the relevant portions of the related inventions are shown in the drawings. It should be noted that the dimensions and sizes of the elements in the figures are not to scale and the sizes of some of the elements may be highlighted for clarity of illustration.
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The embedded type vacuum preloading vacuum degree wireless measuring device provided by the embodiment of the utility model comprises a cavity 1, a data acquisition module 2, an installation interface 3 and a data transmission module 4, wherein the cavity 1 is of a breathable and waterproof structure, the cavity 1 comprises an inner shell 11, an outer shell 12 and an intermediate layer 13 arranged between the inner shell 11 and the outer shell 12, and the inner shell 11 and the outer shell 12 are high-strength plastic layers, as shown in fig. 1. Preferably, the material of the inner shell 11 and the outer shell 12 is GFRP fiber reinforced plastic, the intermediate layer 13 is a breathable and waterproof film, and the cavity 1 is a spherical cavity with a hollow interior. A plurality of first holes 111 are arranged on the inner shell 11, a second hole corresponding to the first hole 111 is arranged on the outer shell 12, and a permeable stone 121 is arranged at the second hole. As shown in fig. 2, preferably, the second hole may be a trapezoidal groove, a length of one side of the trapezoidal groove facing the middle layer 13 is greater than a length of one side of the trapezoidal groove far away from the middle layer 13, and a permeable stone is embedded in the trapezoidal groove, so that water can be prevented from entering the cavity 1, and the cavity 1 can be used normally in a water environment. The cavity 1 is arranged in a sand cushion layer of a vacuum monitoring area, the data acquisition module 2 is arranged in the cavity 1 and used for acquiring monitoring signals, and the data transmission module 4 is connected with the data acquisition module 2 and used for wireless transmission of the signals. Therefore, the circuit elements in the cavity body 1 can be protected, and a stable vacuum pressure cavity is formed, so that the vacuum degree under the sealing film can be really and effectively measured.
In a specific embodiment, as shown in fig. 3, the data acquisition module 2 includes a PCB circuit board 21 and a vacuum degree sensor 22 disposed on the PCB circuit board 21, an MCU single chip microcomputer 23, a power module 24, a signal conversion module 25 and a switch module 26, an output of the power module 24 is connected to the MCU single chip microcomputer 23, the switch module 26 is disposed between the power module and the MCU single chip microcomputer 23, the power module 24 is controlled to be turned on or off by the switch module 26 and the MCU single chip microcomputer 23, and an output voltage of the power module 24 is a wide voltage of 3-12 v. The vacuum degree sensor 22 is used for detecting the vacuum degree, the output of the vacuum degree sensor 22 is connected with the input of the signal conversion module 25, the output of the signal conversion module 25 is connected with the MCU singlechip 23, and serial port data are converted into IP data through the signal conversion module 25. The vacuum degree sensor 22 comprises a silicon pressure sensing chip, data acquisition is directly embedded into the sensor, an external breathable waterproof protective shell is combined, and the data acquisition module 2 and the sensor are jointly embedded into a sealing film to measure the vacuum degree.
In a specific embodiment, the data transmission module 4 includes a reserved signal interface, a waterproof data cable 41 and a signal antenna 42, and performs data transmission through the reserved signal interface in a network signal environment; under the environment without network signals, remote data transmission is realized through the waterproof data cable 41 and the signal antenna 42, one end of the waterproof data cable 41 is fixedly connected with the other end of the installation interface 3, one end of the waterproof data cable 41 is connected with the data acquisition module 2 through a flat cable plug, the other end of the waterproof data cable 41 penetrates through a soil layer and then is connected with the signal antenna 42 on the ground, wireless transmission of signals is realized through the waterproof data cable 41 and the signal antenna 42, and the signal antenna 42 receives and transmits the signals transmitted by the waterproof data cable 41 and converts the signals into electromagnetic wave signals to be sent out. In a preferred embodiment, the waterproof data cable 41 is provided with a metal reinforcement liner. Therefore, the surface strength of the waterproof data cable 41 can be enhanced, and the waterproof data cable 41 is prevented from being bent and bent by the soil pressure in the soil layer. One end of the mounting interface 3 is connected with the data acquisition module 2, the other end of the mounting interface 3 is connected with the data transmission module 4, a third opening is formed in the cavity 1, and the mounting interface 3 is hermetically connected with the cavity 1 at the third opening. Specifically, one end of the mounting interface 3 is provided with a data transmission module 4, the other end of the mounting interface is provided with a waterproof data cable 41, the data transmission module 4 penetrates through a third opening to be placed in the cavity 1 after being mounted, the mounting interface 3 is fixedly connected with the cavity 1 through threads at the third opening, and the third opening is sealed by a sealing washer and high-grade waterproof glue.
In a specific embodiment, the waterproof data cable further comprises a steel pipe with a hollow inner part, the steel pipe is sleeved outside the waterproof data cable 41 and connected with the outside of the cavity 1, and the inner diameter of the steel pipe is larger than the outer diameter of the waterproof data cable 41 and smaller than the outer diameter of the cavity 1. Therefore, the cavity 1 can be accurately pressed into the soil body with the vacuum degree to be measured to measure the vacuum degree.
The embodiment of the application also provides an embedded type wireless measurement method for the vacuum degree of vacuum preloading, and the embedded type wireless measurement device for the vacuum degree of vacuum preloading comprises the following steps:
s1, a power supply module in the data acquisition module is opened, the data acquisition module is connected with an upper computer through a USB data interface, and the upper computer is subjected to channel matching with a remote computer server, specifically, an equipment address code, a 4G DTU data transmission unit baud rate, an IP address, a port, a registration packet and a heartbeat packet are set, so that the upper computer is subjected to channel matching with the remote computer server;
s2, assembling the waterproof data cables of the data acquisition module and the data transmission module through the mounting interface, mounting the data acquisition module in the cavity through the mounting interface, jacking the cavity into the sand cushion through sleeving the steel pipe outside the waterproof data cable, extending the waterproof data cable out of the sand cushion and pulling out the steel pipe;
s3, laying a vacuum sealing film on the surface of a soil layer in a vacuum monitoring area, and binding and sealing the interface of the vacuum sealing film and a waterproof data cable by using a double-layer waterproof airtight adhesive and a plastic binding tape, wherein the vacuum monitoring area is a calibrated point position needing vacuum preloading construction process vacuum degree monitoring;
s4, connecting the waterproof data cable with the signal antenna after the waterproof data cable is stretched into the ground;
s5, in the data acquisition module, the MCU singlechip sends a data uploading instruction to a remote computer server through a wireless network according to a set acquisition frequency, the remote computer server receives the data uploading instruction sent by the MCU singlechip, establishes MCU singlechip unit information and issues the data acquisition instruction, the MCU singlechip receives the data acquisition instruction, turns on a power supply module according to the set acquisition frequency and controls a vacuum degree sensor to measure the vacuum degree, uploads measurement data through the wireless network, and controls the power supply module to be turned off through the MCU singlechip and a switch module after the data acquisition work is finished;
and S6, the remote computer server receives the measurement data according to the MODBUS protocol through a wireless network and displays the measurement data through the network information platform.
Furthermore, early warning can be carried out according to the measurement data, and the state of the instrument and the early warning information are displayed on the network information platform.
The embodiment of the application provides a vacuum detection device under vacuum preloading suitable for large tracts of land is filled out to sea and land making, this scheme is reliable effective, can realize the automatic real-time measurement of vacuum under the membrane, and device installation easy and simple to handle, effectively reduces vacuum preloading vacuum under the membrane and measures the cost.
In the description of the present application, it is to be understood that the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims shall not be construed as limiting the scope. The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed.
It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (9)
1. An embedded wireless vacuum preloading vacuum degree measuring device is characterized by comprising a cavity, a data acquisition module and a data transmission module, wherein the cavity is of a breathable and waterproof structure and is arranged in a sand cushion layer of a vacuum monitoring area, the data acquisition module is arranged in the cavity and is used for acquiring monitoring signals, the data transmission module is connected with the data acquisition module and is used for wirelessly transmitting signals, the data acquisition module comprises a PCB (printed circuit board) and a vacuum degree sensor, an MCU (microprogrammed control unit) singlechip, a power module, a signal conversion module and a switch module which are arranged on the PCB, the output of the power module is connected with the MCU singlechip, the switch module is arranged between the power module and the MCU singlechip and controls the power module to be opened or closed through the switch module and the MCU singlechip, the vacuum degree sensor is used for detecting the vacuum degree, the output of the vacuum degree sensor is connected with the input of the signal conversion module, the output of the signal conversion module is connected with the MCU, and serial port data are converted into IP data through the signal conversion module.
2. The wireless measurement device for embedded vacuum preloading vacuum degree of claim 1, wherein the cavity comprises an inner shell, an outer shell and an intermediate layer arranged between the inner shell and the outer shell, the inner shell and the outer shell are high-strength plastic layers, and the intermediate layer is a breathable and waterproof film.
3. The wireless embedded vacuum preloading vacuum degree measuring device as claimed in claim 2, wherein a plurality of first openings are formed in the inner shell, a second opening corresponding to the first openings is formed in the outer shell, and a permeable stone is disposed at the second opening.
4. The embedded type vacuum preloading vacuum degree wireless measuring device as claimed in claim 1, further comprising an installation interface, wherein one end of the installation interface is connected with the data acquisition module, a third opening is formed in the cavity, and the installation interface is hermetically connected with the cavity at the third opening.
5. The embedded type vacuum preloading vacuum degree wireless measuring device as claimed in claim 4, wherein the data transmission module comprises a reserved signal interface, a waterproof data cable and a signal antenna, and data transmission is performed through the reserved signal interface in a network signal environment; under the environment without network signals, remote data transmission is achieved through the waterproof data cable and the signal antenna, one end of the waterproof data cable is fixedly connected with the other end of the installation interface and is connected with the data acquisition module through a flat cable plug, the other end of the waterproof data cable extends out of the ground to be connected with the signal antenna on the ground, and wireless transmission of signals is achieved through the waterproof data cable and the signal antenna.
6. The embedded wireless vacuum preloading vacuum degree measurement device of claim 5, wherein the waterproof data cable is provided with a metal reinforcement liner.
7. The embedded wireless vacuum preloading measurement device of claim 5, further comprising a steel pipe with a hollow interior, wherein the steel pipe is sleeved outside the waterproof data cable and connected with the outside of the cavity, and the inner diameter of the steel pipe is larger than the outer diameter of the waterproof data cable and smaller than the outer diameter of the cavity.
8. The wireless embedded vacuum preloading vacuum degree measuring device as recited in claim 1, wherein the cavity is spherical in shape.
9. The embedded wireless vacuum preloading vacuum degree measurement device as recited in claim 1, wherein the vacuum degree sensor comprises a silicon pressure sensing chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123119471.9U CN216695399U (en) | 2021-12-13 | 2021-12-13 | Embedded type vacuum prepressing vacuum degree wireless measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123119471.9U CN216695399U (en) | 2021-12-13 | 2021-12-13 | Embedded type vacuum prepressing vacuum degree wireless measuring device |
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| CN216695399U true CN216695399U (en) | 2022-06-07 |
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| CN202123119471.9U Expired - Fee Related CN216695399U (en) | 2021-12-13 | 2021-12-13 | Embedded type vacuum prepressing vacuum degree wireless measuring device |
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