Wireless borehole stress measurement system and method

Abstract

The invention discloses a wireless borehole stress measurement system and method, and belongs to the technical field of stress sensors. In order to solve the problems of large installation difficulty and high cost of a traditional borehole stress detection device, a wireless borehole stress measurement system is designed, after the system is installed, an air pressure sensor and a control device are started to operate, a shell of a reaction air bag is damaged, chemicals in the reaction air bag are fused and react, and a large amount of gas is generated; the air pressure in the metal cavity reaches the initial state, the air pressure sensor monitors the air pressure change of the metal cavity in real time, the wireless communication unit transmits data to the wireless gateway in a wireless communication mode, the wireless gateway transmits the data to the cloud platform, and the cloud platform analyzes and analyzes the received data. The invention provides a mode of using wireless communication and a built-in reaction air bag, so that field wiring, liquid (oil) injection and the like are omitted, the installation mode is simplified, the cost is saved and reduced, and the reliability of equipment and a system is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of stress sensors, and in particular relates to a wireless drilling stress measurement system and method. Background Art

[0002] The wireless borehole stress measurement system is mainly used for stress monitoring of anchor net roadways. It mainly monitors the loose stress state of the roadway surrounding rock and roof, obtains the law of roadway surrounding rock activity, grasps the range of surrounding rock loosening, classifies surrounding rock stability, determines reasonable roadway support forms and support parameters, monitors and forecasts the stability of roadways and chambers, and realizes scientific management of surrounding rock control. Through the changes in borehole stress parameter indicators, the safety status of coal and rock mass within the monitoring range is analyzed and warned. Grasp the impact of mining and the law of support pressure distribution to realize scientific management of surrounding rock control.

[0003] Traditional drilling stress detection devices or drilling stress sensors use methods such as liquid injection or oil injection to stamp the metal cavity in the borehole and detect the pressure of the liquid inside the metal cavity that receives stress. This method has many inconveniences in practical applications. First, in the sensor design, it is necessary to reserve a filling port and a discharge port, which makes the design more complicated, the cost is high, the sealing is poor and the size is large. Secondly, there are high requirements for on-site installation, and pressurized filling is required, and real-time maintenance and pressurized filling are required, which increases the difficulty and time of on-site construction; finally, the size is large, the cost is high, and the measurement is inaccurate. In addition, there is a solution that uses an angle sensor to detect the drilling stress of coal seams, rock formations, etc. by measuring the three-dimensional angle change of the metal rod. This solution has low measurement accuracy for small deformations and cannot meet practical applications. Finally, this type of sensor generally uses a wired connection method, which is difficult to implement and install for on-site wiring and is costly. Summary of the invention

[0004] In view of the problem that traditional drilling stress detection devices are difficult to install and have high costs, the present invention provides a wireless drilling stress measurement system and method.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A wireless drilling stress measurement system, the system comprising a wireless drilling stress measurement device, a wireless gateway, and a cloud platform;

[0007] The wireless gateway is wirelessly connected to a plurality of wireless drilling stress measuring devices and a cloud platform respectively;

[0008] The wireless gateway is used to receive the sensing data of the wireless drilling stress measurement device or send a wake-up instruction to the wireless drilling stress measurement device;

[0009] The wireless drilling stress measuring device periodically sends or receives a wireless gateway wake-up signal and then sends data. The wireless drilling stress measuring device collects current air pressure data according to the timed wake-up instruction of the wireless gateway, and uploads the collected air pressure data to the wireless gateway in the form of a chain network using a single-hop or multi-hop wireless communication method; a single-hop is a wireless communication transmission of two adjacent wireless drilling stress measuring devices in relay; a multi-hop is a wireless communication transmission of one or more wireless drilling stress measuring devices in relay; the wireless gateway aggregates the data and uploads it to the cloud platform;

[0010] The cloud platform conducts comprehensive analysis and judgment on the air pressure data uploaded by the wireless gateway.

[0011] Furthermore, the wireless drilling stress measuring device is cylindrical in shape as a whole, and includes: a metal cavity, a reaction airbag A, a reaction airbag B, an air pressure sensor, a wireless communication unit, a wireless communication antenna, a control device, and a hardware circuit of the wireless drilling stress measuring device.

[0012] Furthermore, the hardware circuit of the wireless drilling stress measurement device includes a main controller, a wireless communication unit, an air pressure sensor, a battery, a wireless transmission circuit and a casing. The air pressure sensor communicates with the main controller via I2C or SPI, and the wireless communication unit communicates with the main controller via UART or SPI.

[0013] Furthermore, the reaction gas bag A stores a reagent for chemical reaction; the reaction gas bag B stores a solvent; the reagent for chemical reaction stored in the reaction gas bag A and the solvent stored in the reaction gas bag B are mixed after the shell is destroyed to produce a chemical reaction, and a large amount of gas with stable chemical properties is produced by the reaction, and the gas is insoluble in the reaction reagent;

[0014] The control device is used to pierce or destroy the outer shells of reaction airbag A and reaction airbag B.

[0015] Furthermore, the chemical reaction between the reaction airbag A and the reaction airbag B is not limited to decomposition reaction, replacement reaction and oxidation-reduction reaction, and the reaction produces a large amount of gas with stable chemical properties, and the gas is insoluble in the reaction reagent;

[0016] The reagents stored in the reaction airbag A for chemical reaction are sodium percarbonate and potassium persulfate;

[0017] The solvent stored in the reaction balloon B is water or an aqueous solution containing a catalyst.

[0018] Further, the wireless gateway includes a main controller, a wireless communication unit, a 4G / 5G communication module, an ETH Ethernet communication module, a wireless transmission circuit and a housing;

[0019] The wireless communication technology used by the wireless communication unit includes at least one of Bluetooth, RFID, Lora, NB-IoT, 4G, 5G and star flash light;

[0020] The data encoding format transmitted by the wireless communication technology includes a start bit, an address bit, a data bit and a check bit.

[0021] Furthermore, the wireless drilling stress measuring device adopts an integrated design, the outer shell is made of metal material, the length is 30cm to 120cm, and meets the IP65 protection level;

[0022] The hardware circuit and wireless gateway of the wireless drilling stress measuring device are both arranged in the shell. The shell is made of polymer material, sealed with epoxy resin, and meets the IP65 protection grade.

[0023] Furthermore, the wireless transmission circuit of the wireless drilling stress measuring device or the wireless gateway adopts a circuit board microstrip antenna, which is connected to the respective main controllers through a feeder line.

[0024] Furthermore, the equipment information and installation information of the wireless drilling stress measuring device are printed on the surface of the shell in the form of a QR code or a bar code by a marking machine, and the code is scanned on site for installation, deployment and configuration.

[0025] Furthermore, the working process of the wireless drilling stress measuring device is as follows:

[0026] Step 1: After power-on, the system enters initialization, configures the working status of related modules, and then enters sleep mode. The wireless drilling stress measurement device wakes up at a scheduled time, or the wireless gateway sends a wake-up command to the wireless drilling stress measurement device to work;

[0027] Step 2: Read the pressure sensor data after waking up regularly to determine whether the data exceeds the threshold;

[0028] Step 3: When the data of the air pressure sensor does not exceed the threshold, the data is uploaded to the wireless gateway at a scheduled time, and then the wireless drilling stress measurement device enters a dormant state, waiting for the wireless gateway to send a wake-up command;

[0029] Step 4: When the data of the air pressure sensor exceeds the threshold, the data is uploaded to the cloud platform in real time, and then the wireless drilling stress measurement device enters a dormant state, waiting for the wireless gateway to send a wake-up command.

[0030] Furthermore, the air pressure sensor in the wireless drilling stress measurement device communicates with the main controller via I2C or SPI, and the wireless communication unit communicates with the main controller via UART or SPI.

[0031] A wireless drilling stress measurement method, the method comprising: after the system is installed, starting the air pressure sensor, controlling the device to operate, destroying the shells of reaction airbags A and reaction airbags B, releasing and fusing the chemicals inside the reaction airbags, and generating a large amount of gas by the reaction, so that the air pressure inside the metal cavity reaches an initial state, the air pressure sensor monitors the air pressure change of the metal cavity in real time, the wireless communication unit transmits the data to the wireless gateway by wireless communication, and the wireless gateway transmits the data to the cloud platform, and the cloud platform analyzes and interprets the received data.

[0032] Compared with the prior art, the present invention has the following advantages:

[0033] The present invention uses an air pressure sensor to measure pressure and uses wireless communication technology to wirelessly transmit air pressure sensor data to a cloud platform.

[0034] The present invention is powered by batteries as a whole and adopts a low-power design. A single battery can meet a service life of up to 8 years. The overall protection level meets the IP65 protection level, and the design standards refer to mine safety and coal safety design.

[0035] Wide coverage: One of the biggest advantages of wireless chain network is that it can achieve long-distance data transmission. Through the relay of multiple nodes, the coverage of wireless signals can be extended to far away places.

[0036] Significant cost-effectiveness: Compared with traditional wired networks, wireless chain networks have obvious advantages in construction costs. Laying long-distance cables or optical fibers requires a lot of manpower, material resources and financial resources, including the purchase of cables, the implementation of laying projects and subsequent maintenance costs. Wireless chain networks do not require large-scale cable laying, but only require the installation of wireless node equipment, which greatly reduces construction costs and construction difficulties.

[0037] Flexible and adaptable: In practical applications, wireless chain networks are very flexible. If you need to add or reduce nodes in the network, the operation is relatively simple.

[0038] Strong stability: In some complex environments, the wireless chain network has excellent stability. Even if a node fails due to natural disasters, man-made damage, etc., as long as it is not a key node or multiple adjacent nodes fail at the same time, the network can continue to maintain a certain data transmission capacity by re-planning the transmission path or enabling spare nodes, etc., to ensure the basic operation of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1Schematic diagram of a wireless drilling stress measuring device; wherein, the wireless drilling stress measuring device 101, a reaction airbag A 102, a reaction device B 103, a metal cavity 104, an air pressure sensor 105, a wireless communication antenna 107, a control device 108, and a hardware circuit 201 of the wireless drilling stress measuring device;

[0040] Figure 2 Schematic diagram of a wireless drilling stress measuring device; wherein the wireless drilling stress measuring device comprises a hardware circuit 201, a main controller 202, a wireless communication unit 203, an air pressure sensor 204, and a battery 205;

[0041] Figure 3 Schematic diagram of a wireless gateway; a wireless gateway-301, including a main controller-302, a wireless communication unit-303, a 4G / 5G communication module-304, and an ETH Ethernet communication module-305;

[0042] Figure 4 It is the working flow chart of the wireless drilling stress measurement device;

[0043] Figure 5 It is a diagram of the wireless drilling stress measurement system and a schematic diagram of the single-hop and multi-hop methods of the wireless chain network;

[0044] Figure 6 A schematic diagram of a chain network of multiple wireless drilling stress measurement devices;

[0045] Figure 7 A schematic diagram of a wireless communication data encoding format for a single wireless drilling stress measurement device;

[0046] Figure 8 This is a schematic diagram of the overall structure of the wireless drilling stress measurement device. DETAILED DESCRIPTION

[0047] In order to gain a deeper understanding of the present invention, we will provide a comprehensive and detailed description of the present invention. However, the present invention has multiple implementations and is not limited to the specific examples listed herein. The presentation of these examples is intended to deepen the comprehensive understanding of the disclosure of the present invention.

[0048] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0049] A wireless drilling stress measurement system, the overall system diagram is as shown in the attached Figure 5As shown, the system includes a wireless drilling stress measurement device 101, a wireless gateway 301, and a cloud platform 401;

[0050] The wireless gateway 301 is wirelessly connected to the plurality of wireless drilling stress measuring devices 101 and the cloud platform 401 respectively;

[0051] The wireless gateway 301 is used to receive the sensing data of the wireless drilling stress measurement device 101 or send a wake-up instruction to the wireless drilling stress measurement device 101;

[0052] The wireless drilling stress measuring device 101 periodically sends or receives a wireless gateway wake-up signal and then sends data. The wireless drilling stress measuring device 101 collects current air pressure data according to the timed wake-up instruction of the wireless gateway 301, and uploads the collected air pressure data to the wireless gateway 301 in the form of a chain network using a single-hop or multi-hop wireless communication method. The chain network is shown in the attached Figure 6 As shown in the figure; single hop, that is, two adjacent wireless drilling stress measurement devices perform relay wireless communication transmission; multi-hop, that is, one or more wireless drilling stress measurement devices perform relay wireless communication transmission; single hop and multi-hop forms are shown in the attached figure. Figure 5 As shown, the wireless gateway aggregates the data and uploads it to the cloud platform 401;

[0053] The cloud platform 401 performs comprehensive analysis and judgment on the air pressure data uploaded by the wireless gateway 301 .

[0054] Furthermore, the wireless drilling stress measuring device 101 is cylindrical in shape as a whole, and comprises: a metal cavity 104, a reaction airbag A 102, a reaction airbag B 103, an air pressure sensor 105, a wireless communication antenna 107, a control device 108, and a hardware circuit 201 of the wireless drilling stress measuring device; Figure 1 , as shown in 8.

[0055] The hardware circuit 201 of the wireless drilling stress measurement device includes a main controller 202, a wireless communication unit 203, an air pressure sensor 204, a battery 205, a wireless transmission circuit and a housing. The air pressure sensor communicates with the main controller via I2C or SPI, and the wireless communication unit communicates with the main controller via UART or SPI. Figure 2 shown.

[0056] The wireless drilling stress measurement device is deployed inside the borehole. After installation, the built-in reaction airbag of the single-section wireless drilling stress measurement device reacts to generate gas to pressurize the metal cavity. The built-in air pressure sensor detects the pressure data in the cavity (air pressure sensor n Datan). After obtaining the air pressure data, the data is transmitted to the wireless gateway through wireless communication. The wireless gateway is then connected to the cloud platform or ring network through wired or wireless (4G / 5G) methods. The cloud platform analyzes and interprets the received data;

[0057] The wireless drilling stress measuring device has the functions of autonomous inflation and pressure replenishment.

[0058] The wireless communication data of a single wireless stress measurement device is Data, and its data encoding includes: a start bit, an address bit, a data bit, and a check bit.

[0059] Furthermore, the air pressure sensor in the wireless drilling stress measuring device communicates with the main controller via I2C or SPI, and the wireless communication unit communicates with the main controller via UART or SPI. The wireless drilling stress measuring device can be used as a wireless relay to transmit data signals.

[0060] Further, the reaction gas bag A 102 stores a reagent for chemical reaction; the reaction gas bag B 103 stores a solvent; the reagent for chemical reaction stored in the reaction gas bag A 102 and the solvent stored in the reaction gas bag B 103 are mixed after the shell is destroyed and a chemical reaction occurs, and the reaction produces a large amount of gas with stable chemical properties, and the gas is insoluble in the reaction reagent;

[0061] The control device 108 is used to pierce or destroy the shells of the reaction balloon A102 and the reaction balloon B103. Figure 1 , as shown in 8.

[0062] The chemical reaction performed by the reaction gas capsule A 102 and the reaction gas capsule B 103 is not limited to decomposition reaction, replacement reaction and oxidation-reduction reaction, and the reaction produces a large amount of gas with stable chemical properties, and the gas is insoluble in the reaction reagent;

[0063] The reagents stored in the reaction airbag A 102 for chemical reaction are sodium percarbonate and potassium persulfate;

[0064] The solvent stored in the reaction balloon B 103 is water or an aqueous solution containing a catalyst.

[0065] Further, the wireless gateway 301 includes a main controller 302, a wireless communication unit 303, a 4G / 5G communication module 304, an ETH Ethernet communication module 305, a wireless transmission circuit and a housing; as shown in the attached Figure 3 As shown;

[0066] The wireless communication technology used by the wireless communication unit 303 includes at least one of Bluetooth, RFID, Lora, NB-IoT, 4G, 5G and star flash light;

[0067] The data encoding format transmitted by the wireless communication technology includes a start bit, an address bit, a data bit and a check bit.

[0068] The data format transmitted by the wireless communication technology in the embodiment of the present invention includes a start bit, an address bit, a data bit and a check bit; Figure 7 As shown; wherein, the start bit is the type of the wireless drilling stress measuring device, the address bit is the MAC address of the wireless drilling stress measuring device, the MAC address of a single wireless drilling stress measuring device is unique, and the source of the data can be determined based on this address; data bit: pressure data detected by the wireless drilling stress measuring device; check bit: whether the data collected and sent by the wireless drilling stress measuring device is correct, and whether the data is valid can be determined based on this check bit.

[0069] Furthermore, the wireless drilling stress measuring device adopts an integrated design, the outer shell is made of metal material, the length is 30cm to 120cm, and meets the IP65 protection level;

[0070] The hardware circuit and wireless gateway of the wireless drilling stress measuring device are both arranged in the shell. The shell is made of polymer material, sealed with epoxy resin, and meets the IP65 protection grade.

[0071] Furthermore, the wireless transmission circuit of the wireless drilling stress measuring device or the wireless gateway adopts a circuit board microstrip antenna, which is connected to the respective main controllers through a feeder line.

[0072] Furthermore, the equipment information and installation information of the wireless drilling stress measuring device are printed on the surface of the shell in the form of a QR code or a bar code by a marking machine, and the code is scanned on site for installation, deployment and configuration.

[0073] Furthermore, the working process of the wireless drilling stress measuring device is as follows: Figure 4 As shown, the specific operations are:

[0074] Step 1: After power-on, the system enters initialization, configures the working status of related modules, and then enters sleep mode. The wireless drilling stress measurement device wakes up at a scheduled time, or the wireless gateway sends a wake-up command to the wireless drilling stress measurement device to work;

[0075] Step 2: Read the pressure sensor data after waking up regularly to determine whether the data exceeds the threshold;

[0076] Step 3: When the data of the air pressure sensor does not exceed the threshold, the data is uploaded to the wireless gateway at a scheduled time, and then the wireless drilling stress measurement device enters a dormant state, waiting for the wireless gateway to send a wake-up command;

[0077] Step 4: When the data of the air pressure sensor exceeds the threshold, the data is uploaded to the cloud platform in real time, and then the wireless drilling stress measurement device enters a dormant state, waiting for the wireless gateway to send a wake-up command.

[0078] Furthermore, the air pressure sensor in the wireless drilling stress measurement device communicates with the main controller via I2C or SPI, and the wireless communication unit communicates with the main controller via UART or SPI.

[0079] A wireless drilling stress measurement method, the method comprising: after the system is installed, starting the air pressure sensor, controlling the device to operate, destroying the shells of reaction airbags A and reaction airbags B, releasing and fusing the chemicals inside the reaction airbags, and generating a large amount of gas by the reaction, so that the air pressure inside the metal cavity reaches an initial state, the air pressure sensor monitors the air pressure change of the metal cavity in real time, the wireless communication unit transmits the data to the wireless gateway by wireless communication, and the wireless gateway transmits the data to the cloud platform, and the cloud platform analyzes and interprets the received data.

[0080] The present invention aims to solve the problems of low reliability, poor stability and high cost of existing sensors during use, and provides a wireless drilling stress measurement system and method. The present invention uses a chain network wireless transmission method to transmit data in a single-hop and multi-hop manner. The wireless chain network is a special wireless network topology with a unique transmission method. In this network, each node is connected in sequence to form a chain-like shape. Data transmission usually adopts a relay method. The signal starts from the source node and is transmitted to the next adjacent node one by one in the form of wireless communication. Each node carries the data of the previous node until it reaches the target node, completing the transmission of all node data.

[0081] The topology of the wireless chain network is clear and the connection between nodes is simple and linear. This structure makes the network planning and management relatively easy.

[0082] The data transmission path in the wireless chain network is fixed and is carried out in sequence according to the order of nodes. This feature facilitates network flow control and data management, and also makes it easy to troubleshoot and locate problems during transmission.

[0083] Each node not only needs to receive data from the previous node, but also needs to forward the data to the next node accurately, so it needs to have both receiving and forwarding functions. This places certain requirements on the hardware and software design of the node. The node needs to have sufficient processing power and stable wireless communication capabilities.

[0084] Those skilled in the art can clearly understand that the specific working processes of the systems, devices, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and for the sake of brevity, they are not further described here.

[0085] In addition, the functional units in various embodiments of the present invention may be physically independent of each other, or two or more functional units may be integrated together, or all functional units may be integrated into one processing unit. The above integrated functional units may be implemented in the form of hardware, or in the form of software or firmware.

[0086] It can be understood by a person skilled in the art that if the integrated functional unit is implemented in the form of software and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention can be essentially or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, which includes several instructions to enable a computing device (such as a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention when running the instructions. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes. Alternatively, all or part of the steps of the aforementioned method embodiment can be implemented by hardware related to program instructions (such as a computing device such as a personal computer, a server, or a network device), and the program instructions can be stored in a computer-readable storage medium. When the program instructions are executed by the processor of the computing device, the computing device executes all or part of the steps of the method described in each embodiment of the present invention.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that within the spirit and principles of the present invention, the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate from the protection scope of the present invention.

[0088] The contents not described in detail in the specification of the present invention belong to the prior art known to the professional and technical personnel in the field. Although the illustrative specific embodiments of the present invention are described above to facilitate the understanding of the present invention by the technical personnel in the field, it should be clear that the present invention is not limited to the scope of the specific embodiments. For the ordinary technical personnel in the field, as long as various changes are within the spirit and scope of the present invention defined and determined by the attached claims, these changes are obvious, and all inventions and creations using the concept of the present invention are protected.

Claims

1. A wireless drilling stress measurement system, characterized in that: The system comprises a wireless drilling stress measuring device (101), a wireless gateway (301), and a cloud platform (401); The wireless gateway (301) is wirelessly connected to a plurality of wireless drilling stress measuring devices (101) and a cloud platform (401) respectively; The wireless gateway (301) is used to receive sensing data from the wireless drilling stress measurement device (101) or send a wake-up instruction to the wireless drilling stress measurement device (101); The wireless drilling stress measurement device (101) periodically sends or receives a wireless gateway wake-up signal and then sends data. The wireless drilling stress measurement device (101) collects current air pressure data according to the timed wake-up instruction of the wireless gateway (301), and uploads the collected air pressure data to the wireless gateway (301) in a chain network using a single-hop or multi-hop wireless communication method; the wireless gateway aggregates the data and uploads it to the cloud platform (401); The cloud platform (401) performs comprehensive analysis and judgment on the air pressure data uploaded by the wireless gateway (301).

2. A wireless drilling stress measurement system according to claim 1, characterized in that: The wireless drilling stress measuring device (101) is cylindrical in shape as a whole, and comprises: a metal cavity (104), a reaction airbag A (102), a reaction airbag B (103), an air pressure sensor (105), a wireless communication antenna (107), a control device (108), and a hardware circuit (201) of the wireless drilling stress measuring device.

3. A wireless drilling stress measurement system according to claim 2, characterized in that: The hardware circuit (201) of the wireless drilling stress measuring device comprises a main controller (202), a wireless communication unit (203), an air pressure sensor (204), a battery (205), a wireless transmission circuit and a housing; the air pressure sensor communicates with the main controller via I2C or SPI, and the wireless communication unit communicates with the main controller via UART or SPI.

4. A wireless drilling stress measurement system according to claim 3, characterized in that: The reaction gas bag A (102) stores a reagent for chemical reaction; the reaction gas bag B (103) stores a solvent; the reagent for chemical reaction stored in the reaction gas bag A (102) and the solvent stored in the reaction gas bag B (103) are mixed after the shell is destroyed to produce a chemical reaction, and a large amount of gas with stable chemical properties is produced by the reaction, and the gas is insoluble in the reaction reagent; The control device (108) is used to pierce or destroy the outer shells of the reaction balloon A (102) and the reaction balloon B (103).

5. A wireless drilling stress measurement system according to claim 4, characterized in that: The reagent for chemical reaction stored in the reaction air bag A (102) is sodium percarbonate or potassium persulfate; The solvent stored in the reaction gas bag B (103) is water or an aqueous solution containing a catalyst.

6. A wireless drilling stress measurement system according to claim 5, characterized in that: The wireless gateway (301) comprises a main controller (302), a wireless communication unit (303), a 4G / 5G communication module (304), an ETH Ethernet communication module (305), a wireless transmission circuit and a housing; The wireless communication technology used by the wireless communication unit (303) includes at least one of Bluetooth, RFID, Lora, NB-IoT, 4G, 5G and star flash light; The data encoding format transmitted by the wireless communication technology includes a start bit, an address bit, a data bit and a check bit.

7. A wireless drilling stress measurement system according to claim 6, characterized in that: The wireless drilling stress measurement device adopts an integrated design, the outer shell is made of metal material, the length is 30cm to 120cm, and meets the IP65 protection level; The hardware circuit and wireless gateway of the wireless drilling stress measurement device are both arranged in a shell, which is made of polymer material, sealed with epoxy resin, and meets the IP65 protection grade; The wireless transmission circuit of the wireless drilling stress measuring device or the wireless gateway adopts a circuit board microstrip antenna and is connected to the respective main controllers through a feeder line.

8. A wireless drilling stress measurement system according to claim 7, characterized in that: The equipment information and installation information of the wireless drilling stress measuring device are printed on the surface of the shell in the form of a QR code or a bar code by a marking machine, and the code is scanned on site for installation, deployment and configuration.

9. A wireless drilling stress measurement system according to claim 8, characterized in that: The working process of the wireless drilling stress measuring device is as follows: Step 1: After power-on, the system enters initialization, configures the working status of related modules, and then enters sleep mode. The wireless drilling stress measurement device wakes up at a scheduled time, or the wireless gateway sends a wake-up command to the wireless drilling stress measurement device to work; Step 2: Read the pressure sensor data after waking up regularly to determine whether the data exceeds the threshold; Step 3: When the data of the air pressure sensor does not exceed the threshold, the data is uploaded to the wireless gateway at a scheduled time, and then the wireless drilling stress measurement device enters a dormant state, waiting for the wireless gateway to send a wake-up command; Step 4: When the data of the air pressure sensor exceeds the threshold, the data is uploaded to the cloud platform in real time, and then the wireless drilling stress measurement device enters a dormant state, waiting for the wireless gateway to send a wake-up command.

10. A wireless drilling stress measurement method, characterized in that: The method is as follows: after the system is installed, the air pressure sensor is started, the control device is operated, the shells of reaction airbag A and reaction airbag B are destroyed, the chemicals inside the reaction airbags are released and fused, and a large amount of gas produced by the reaction makes the air pressure inside the metal cavity reach an initial state. The air pressure sensor monitors the air pressure changes in the metal cavity in real time, the wireless communication unit transmits the data to the wireless gateway through wireless communication, and the wireless gateway transmits the data to the cloud platform, and the cloud platform analyzes and interprets the received data.

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