CN106802340B

CN106802340B - Wireless measurement device and method for simulation experiment of similar materials in mining

Info

Publication number: CN106802340B
Application number: CN201710080963.0A
Authority: CN
Inventors: 张艳丽; 伍永平; 武会杰
Original assignee: Xian University of Science and Technology
Current assignee: Xian University of Science and Technology
Priority date: 2017-02-15
Filing date: 2017-02-15
Publication date: 2023-03-03
Anticipated expiration: 2037-02-15
Also published as: CN106802340A

Abstract

The sensor (7) comprises an elastic element (14) and a deformation detection element (15), the elastic element (14) is in close contact with an upper bearing plate (4) and a lower bearing plate (6), the deformation detection element (15) is used for detecting deformation of the elastic element (14), the upper bearing plate (4) and the lower bearing plate (6) are positioned with the elastic element (14) through connecting bolts (2) respectively, so that load applied to the upper bearing plate (4) acts on the elastic element (14), the deformation detection element (15) generates a measurement signal, a data acquisition module (8) is connected with the sensor (7) to acquire the measurement signal, a wireless communication module (9) with an antenna (1) is connected with the data acquisition module (8) to wirelessly transmit the measurement signal, and the antenna (1) extends out from between the upper bearing plate (4) and a protective shell (10).

Description

Wireless measurement device and method for simulation experiment of similar materials in mining

Technical Field

The invention relates to the field of similar material simulation, in particular to a wireless measuring device and a measuring method for a similar material simulation experiment in mining.

Background

The simulation experiment of the similar materials is widely applied to the field of mining engineering, in the experimental process, how to adopt an advanced testing method to obtain real and reliable experimental data is the key point of success or failure of the experiment, the pressure distribution rules in coal bodies in front of and behind the stope face, below the stope face and behind the stope face are monitored in real time, the pressure-incoming strength and the pressure-incoming step pitch of the field working face can be predicted, and scientific basis is provided for bracket model selection and the like. At present, in a similar material simulation experiment, sensors for monitoring the test of the overlying strata pressure of a coal seam are mostly wired sensors with relatively large sizes, meanwhile, a data acquisition instrument and software are arranged outside, the whole system is complex, a great deal of inconvenience is brought to the experiment, and in order to overcome the defects of the existing force measuring system, a wireless force measuring sensor with small size is developed.

The patent document CN 104614103A discloses a wireless passive prestress sensor, which is used for detecting information of prestress change of a reinforcing steel bar in a building structure and comprises a radio frequency module, a power supply module, a data module and a modulation module; the signal is transmitted by the external equipment, reaches the sensor through the radio frequency module, becomes stable voltage through the processing of power module and supplies power for whole sensor, and the data module converts the analog signal who gathers into digital signal to on modulating the radio frequency signal with the data through the modulation module, acquire by the external equipment demodulation. This patent realizes carrying out regular or long-term detection with wireless passive light mode to the health nature of building, and loading board about nevertheless this patent does not have, and the unable load that the accurate measurement bore, and wireless signal is weak, and the practicality is poor, and the maneuverability of this patent is relatively poor, can't learn to establish operating condition, the signal in building structure whether normal etc..

A similar material simulation fault test device disclosed in patent document CN106128259 a comprises a frame, the frame comprises an upper beam, a lower beam and side columns, a clamp plate is mounted on the lower beam, the clamp plate can slide on the lower beam and can be fixed on the lower beam, the clamp plate is hinged to a rotating plate, an elongated slot is arranged in the center of the rotating plate, a T-shaped plate capable of sliding along the elongated slot is mounted in the elongated slot, the T-shaped plate comprises a partition plate and a limiting plate, two beam support beams are fixedly arranged below the upper beam, two side column support beams are fixedly arranged on the inner sides of the side columns, a pressurizing system is vertically mounted below the upper beam, pressurizing systems are transversely mounted on the inner sides of the two side columns, baffle support plates are respectively arranged on the inner sides of the left and right side columns, the baffle support plates are movably mounted on the upper and lower beams and can slide left and right along the upper and lower beams, a baffle is mounted between the left and right baffle support plates, and the baffle can slide left relative to right relative to the two baffle support plates; the pressurizing system comprises a pressing device, two jacking devices, a bracket, a pressurizing base plate, a pressure sensor and a processor, wherein the bracket comprises a bottom plate and two side wings fixedly connected with the bottom plate; the cylinder barrels of the downward pressing devices of the vertically installed pressurizing systems are fixedly installed on the upper cross beam, the cylinder barrels of the upward jacking devices are fixedly installed on the cross beam supporting beams, the cylinder barrels of the downward pressing devices of the transversely installed pressurizing systems are fixedly installed on the side columns, and the cylinder barrels of the two upward jacking devices are fixedly installed on the two side column supporting beams. The actual pressure that this patent was applyed is close with theoretical pressure, and the measuring result of experiment is accurate, but this patent structure is complicated, can't obtain the detected signal portably, and wireless signal is weak, and the practicality is poor, and the maneuverability of this patent is relatively poor, can't learn the operating condition of establishing in building structure, whether the signal is normal etc..

The patent document CN103399505 a discloses a similar material model strength monitoring device, a module required for testing the similar material model strength monitoring device comprises a single-chip microcomputer AT89C52, a buzzer BUZ1, a temperature sensor DS18B20, a liquid crystal display AMPIRE128X64 and a humidity sensor SHT11, wherein 39 pins of the single-chip microcomputer AT89C52 are provided, an XTAL1 pin and an XTAL2 pin are respectively connected to two ends of a 11.0592Mhz crystal oscillator X1 through wires and are respectively connected in series with a capacitor C1 and a capacitor C2 and then are grounded to form a parallel oscillation circuit, wherein the capacitor C1 and the capacitor C2 are ceramic chip capacitors of 30uf, and are set for smooth oscillation starting; the RST pin of the single chip microcomputer is a reset signal end, is connected with a resistor R2 of 10K omega and then is connected to a ground end, and the single chip microcomputer can work normally by keeping a 0 signal; a RST pin of the single chip microcomputer AT89C52 is connected with one end of a buzzer BUZ1 through an electrolytic capacitor C3, the other end of the buzzer is connected with a collector of an NPN type triode Q1, an emitter of the triode Q1 is grounded, a base is connected with a resistor R3 and then connected to a P2.3 port of the single chip microcomputer, and the buzzer BUZ1 is used for alarming when the humidity reaches a threshold value; the temperature sensor comprises three pins of VCC, DQ and GND, wherein the VCC end is a power supply end and is connected to a 5V power supply, meanwhile, the VCC pin is connected to a DQ pin after being connected with a 4.7K omega pull-up resistor R1, the DQ end of the data pin is additionally connected to a P2.0 port of the single chip microcomputer, and the GND end is a grounding end and is directly grounded; the liquid crystal display AMPIRE128X64 has 18 pins, wherein the RST pin, the RS pin and the VCC end are connected to an external 5V power supply together, the liquid crystal display AMPIRE128X64 needs two wires for serial control, the E end is connected to a P2.2 port of the single chip microcomputer, and the R/W end is connected to a P2.1 port of the single chip microcomputer; an SCK port of the humidity sensor SHT11 is connected to a P3.6 port of the single chip microcomputer, and a DATA DATA end is connected to a P3.7 port of the single chip microcomputer; S1-S4 are 4 keys which respectively execute +1, -1, shift and restore original value functions, the key S1 is connected with a P0.0 port of the single chip microcomputer through a pull-up resistor R4, the key S2 is connected with the P0.1 port of the single chip microcomputer through a pull-up resistor R5, the key S3 is communicated with the P0.2 port of the single chip microcomputer through a pull-up resistor R6, and the key S4 is communicated with the P0.3 port of the single chip microcomputer through a pull-up resistor R7. This patent can realize carrying out accurate control to the sunning day of the model, and this patent does not have upper and lower loading board, and the load that can't the precision measurement bore, and radio signal is weak, and the practicality is poor, and the maneuverability of this patent is relatively poor, can't learn to establish operating condition, the signal in building structure whether normal etc..

The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a wireless measurement device and a measurement method thereof for a simulation experiment of similar materials in mining, the wireless measurement device does not need to be calibrated before each experiment, the size of the sensor is relatively small, the wireless measurement device can be well coupled with similar materials, the influence of a test element inside a model on an experiment result is reduced, the linearity of the sensor is good, the measurement precision is high, the measurement data is real and reliable, an external acquisition instrument and a connection line are reduced, the system structure is simple, and the equipment failure is reduced.

The purpose of the invention is realized by the following technical scheme.

In one aspect of the invention, a wireless measuring device for a simulation experiment of similar materials in mining comprises an upper bearing plate, a lower bearing plate and a protective shell, wherein the upper bearing plate is used for bearing the weight of a similar material model, the lower bearing plate is arranged between the upper bearing plate and the lower bearing plate, the lower bearing plate provides a flat bearing surface, a sensor, a data acquisition module and a wireless communication module are arranged in the protective shell, the sensor comprises an elastic element and a deformation detection element, the elastic element is in close contact with the upper bearing plate and the lower bearing plate, the upper bearing plate and the lower bearing plate are respectively positioned with the elastic element through connecting bolts, so that load applied to the upper bearing plate acts on the elastic element, the deformation detection element generates a measuring signal, the data acquisition module is connected with the sensor to acquire the measuring signal, the wireless communication module with an antenna is connected with the data acquisition module to wirelessly transmit the measuring signal, the antenna extends out from the upper bearing plate and the protective shell, a signal indicator lamp for indicating whether communication is normal is connected with the wireless communication module, a reset button for resetting is electrically connected with the sensor, and a switch button for switching is electrically connected with the signal indicator lamp, the reset button and the switch button are arranged on one side of the protective shell.

Preferably, a rechargeable battery is arranged in the protective shell, and the rechargeable battery is electrically connected with the sensor, the data acquisition module and the wireless communication module.

Preferably, a charging socket is arranged on one side of the protective shell, and the charging socket is electrically connected with the rechargeable battery.

Preferably, the elastic element is an aluminum alloy plate, the deformation detection element is a bridge type force-sensitive sensor, and the bridge type force-sensitive sensor comprises a first half-bridge resistance strain gauge and a second half-bridge resistance strain gauge, wherein the first half-bridge resistance strain gauge is arranged between the upper bearing plate and the elastic element, and the second half-bridge resistance strain gauge is arranged between the elastic element and the lower bearing plate.

Preferably, the width of aluminum alloy plate is not more than the width of last loading board, the width of aluminum alloy plate is less than the length of last loading board, first half-bridge resistance strain gauge and second half-bridge resistance strain gauge are the half-bridge resistance strain gauge of 45 degrees silk bars, the output sensitivity of bridge type force sensor is 2.0mV/V, and comprehensive precision is superior to 0.05%.

Preferably, the data acquisition module comprises an a/D conversion chip for converting the measurement signal from an analog signal to a digital signal and a single chip for signal processing, and the data acquisition module has a display resolution of 0.01kg and a sampling rate of 5 times/s.

Preferably, the wireless communication module includes a 2.4G wireless communication unit and a USB communication interface disposed at one side of the protective case.

Preferably, the external dimensions of the wireless measuring device are 200mm × 30mm × 40mm in length, width and height, and the measuring range is 100kg.

Preferably, the upper bearing plate and the lower bearing plate are both made of steel plates with the thickness of 9mm, the rechargeable battery is a 7.4V/1000mAh lithium ion battery, the data acquisition module comprises a memory, and the memory comprises one or more of a Read Only Memory (ROM), a Random Access Memory (RAM), a flash memory or an Electrically Erasable Programmable Read Only Memory (EEPROM).

In another aspect of the invention, a measuring method using the wireless measuring device for the simulation experiment of the similar materials in the mining process comprises the following steps:

in the first step: and placing the lower bearing plate of the wireless measuring device on the flat bearing surface, and laying the similar material model on the upper bearing plate.

In the second step: pressing a switch button to start a sensor, generating a measuring signal based on deformation by the sensor, acquiring the measuring signal by a data acquisition module, and wirelessly transmitting the measuring signal by a wireless communication module.

In the third step: the computer receives and analyzes the measurement signal, and generates a table display graph, a curve display graph, data storage and/or historical data playback of the measurement signal.

The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly apparent, and to make the implementation of the content of the description possible for those skilled in the art, and to make the above and other objects, features and advantages of the present invention more obvious, the following description is given by way of example of the specific embodiments of the present invention.

Drawings

Various other advantages and benefits of the present invention will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. Also, like parts are designated by like reference numerals throughout the drawings.

In the drawings:

FIG. 1 is a front view of a wireless measurement device for a simulation experiment of mining a similar material according to one embodiment of the present invention;

FIG. 2 is a left side view of a wireless measurement device for a simulation experiment of mining a similar material according to another embodiment of the present invention;

FIG. 3 is a top view of a wireless measurement device for a simulation experiment of mining a similar material, according to one embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a wireless measurement device for a simulation experiment of mining a similar material according to one embodiment of the invention;

fig. 5 is a schematic step diagram of a measurement method of a wireless measurement device suitable for a simulation experiment of similar materials in mining according to one embodiment of the invention.

The invention is further explained below with reference to the figures and examples.

Detailed Description

Specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While specific embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

It should be noted that certain terms are used throughout the description and following claims to refer to particular components. As one skilled in the art will appreciate, various names may be used to refer to a component. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The description which follows is a preferred embodiment of the invention, but is made for the purpose of illustrating the general principles of the invention and not for the purpose of limiting the scope of the invention. The scope of the invention is to be determined by the claims appended hereto.

For the purpose of facilitating understanding of the embodiments of the present invention, the following description will be made by taking specific embodiments as examples with reference to the accompanying drawings, and the drawings are not to be construed as limiting the embodiments of the present invention.

For better understanding, fig. 1 to 4 are a front view, a left view, a top view and a cross-sectional view of a wireless measuring device for a simulation experiment of similar materials in mining according to an embodiment of the present invention, the wireless measuring device for a simulation experiment of similar materials in mining includes an upper loading plate 4 for loading similar materials, a lower loading plate 6 providing a flat loading surface, and a protective case 10 provided between the upper loading plate 4 and the lower loading plate 6, a sensor 7, a data acquisition module 8 and a wireless communication module 9 are provided in the protective case 10, the sensor 7 includes an elastic element 14 in close contact with the upper loading plate 4 and the lower loading plate 6 and a deformation detection element 15 detecting deformation of the elastic element 14, the upper loading plate 4 and the lower loading plate 6 are positioned with the elastic element 14 by a connection bolt 2 such that a load applied on the upper loading plate 4 acts on the elastic element 14, the deformation detection element 15 generates a measurement signal, the data acquisition module 8 connects the sensor 7 to acquire the measurement signal, the wireless communication module 9 with an antenna 1 connects the data acquisition module 8 to wirelessly transmit the measurement signal, the antenna 1 is extended from between the upper loading plate 4 and the protective case 10, an indication button 12 for indicating whether the wireless switch 11 is electrically connected to the wireless switch 11 and the reset button 12 for indicating whether the wireless switch 11 and the reset button 13 are connected for the wireless communication module 13 for indicating the wireless communication switch 12 for the wireless communication switch 12 and the reset switch 12 for the wireless communication module 13 for the wireless communication.

In one embodiment, in the wireless measuring device for the simulation experiment of similar materials in mining, when the sensor 7 bears the load, the resistance strain gauge adhered to the deformation area generates resistance change along with deformation, and then voltage signals are output, the data acquisition module 8 converts the analog signals of the sensor into digital signals, and after the digital signals are controlled and converted, the digital signals are communicated with computer measurement and control software through the wireless communication module 9, and the computer measurement and control software analyzes, displays and processes the measured data. The built-in lithium battery 3 provides power for the sensor 7, the data acquisition module 8 and the wireless communication module 9. The charging socket 5 is used for charging the battery and can be used for alternating current when the electric quantity of the battery is insufficient in the experimental process. The sensor can be electrified to work after the switch button 13 is pressed for a long time until the indicator light is on, and the sensor is turned off by pressing the reset button 12. The signal indicating lamp 11 is used for prompting the sensor to communicate normally or abnormally, when the sensor communicates normally, the signal indicating lamp 11 is displayed in green and is in a flashing state, and when the sensor communicates abnormally, the signal indicating lamp is displayed in red.

In one embodiment, a rechargeable battery 3 is disposed in the protective casing 10, and the rechargeable battery 3 is electrically connected to the sensor 7, the data acquisition module 8 and the wireless communication module 9.

In one embodiment, a charging socket 5 is provided at one side of the protective case 10, and the charging socket 5 is electrically connected to the rechargeable battery 3.

In one embodiment, the elastic element 14 is an aluminum alloy plate, and the deformation detecting element 15 is a bridge type force sensor, which includes a first half-bridge strain gauge disposed between the upper carrier plate 4 and the elastic element 14 and a second half-bridge strain gauge disposed between the elastic element 14 and the lower carrier plate 6.

In one embodiment, the width of the aluminum alloy plate is not greater than the width of the upper bearing plate 4, the width of the aluminum alloy plate is less than the length of the upper bearing plate 4, the first half-bridge resistance strain gauge and the second half-bridge resistance strain gauge are 45-degree wire grid half-bridge resistance strain gauges, the output sensitivity of the bridge type force sensor is 2.0mV/V, and the comprehensive accuracy is better than 0.05%.

In one embodiment, the data acquisition module 8 includes an a/D conversion chip for converting the measurement signal from an analog signal to a digital signal and a single chip for signal processing, and the display resolution of the data acquisition module 8 is 0.01kg and the sampling rate is 5 times/s.

In one embodiment, the wireless communication module 9 includes a 2.4G wireless communication unit and a USB communication interface disposed at a side of the protective case.

In one embodiment, the external dimensions of the wireless measuring device are 200mm × 30mm × 40mm in length, width and height, and the measuring range is 100kg.

In one embodiment, the upper and

lower carrier plates

4 and 6 are made of a steel plate with a thickness of 9mm, the rechargeable battery 3 is a 7.4V/1000mAh lithium ion battery, and the data acquisition module 8 includes a memory including one or more of a ROM, a RAM, a flash memory, or an EEPROM.

Fig. 5 is a schematic step diagram of a measuring method using the wireless measuring device for a simulation experiment of mining similar materials according to an embodiment of the invention.

As shown in fig. 5, the measurement method using the wireless measurement device for the simulation experiment of the similar mining materials includes:

in the first step: the lower carrier plate 6 of the wireless measuring device is placed on a flat carrier surface and a model of similar material is laid on the upper carrier plate 4.

In the second step: pressing switch button 13 starts sensor 7, sensor 7 generates measuring signal based on the deformation, and data acquisition module 8 gathers measuring signal, and wireless communication module 9 wireless transmission measuring signal.

The wireless measurement device and the measurement method thereof have the following advantages.

1. The wireless measuring device reduces the influence of cables on model pavement, simplifies the model pavement process and enables the model pavement to be convenient and easy.

2. The sensor does not need to be calibrated before each experiment, only needs to be reset through measurement and control software, is simple and fast to operate, and greatly reduces the working strength of experimenters.

3. The sensor can complete data transmission only by connecting one data receiver with a computer for measurement and control, external acquisition instruments and connecting wires are reduced, the system is simple in structure, and equipment faults are reduced.

4. The sensor is relatively small in size, can be well coupled with similar materials, and reduces the influence of test elements inside the model on an experimental result.

5. The sensor has good linearity, high measurement precision and real and reliable measurement data.

6. The sensor is provided with a signal indicating lamp, so that whether the communication is normal or not can be prompted, and the troubleshooting time is saved.

7. The sensor is convenient to power, a built-in lithium battery can be used for supplying power to the sensor, and when the electric quantity of the battery is insufficient, alternating current can be used for supplying power.

8. The sensor surface is waterproofed to prevent rust and water in similar material models from affecting the performance of the sensor.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments and application fields, and the above-described embodiments are illustrative, instructive, and not restrictive. Those skilled in the art, having the benefit of this disclosure, may effect numerous modifications thereto without departing from the scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a wireless measuring device for similar material simulation experiment of mining, its includes last loading board (4), lower loading board (6) that are used for bearing similar material model weight and establishes protective housing (10) between last loading board (4) and lower loading board (6), lower loading board (6) provide smooth bearing surface, be equipped with sensor (7), data acquisition module (8) and wireless communication module (9) in protective housing (10), its characterized in that: the sensor (7) comprises an elastic element (14) and a deformation detection element (15), wherein the elastic element (14) is in close contact with the upper bearing plate (4) and the lower bearing plate (6), the deformation detection element (15) is used for detecting deformation of the elastic element (14), the upper bearing plate (4) and the lower bearing plate (6) are respectively positioned through a connecting bolt (2) and the elastic element (14) so that a load applied to the upper bearing plate (4) acts on the elastic element (14), the deformation detection element (15) generates a measurement signal, a data acquisition module (8) is connected with the sensor (7) for acquiring the measurement signal, a wireless communication module (9) with an antenna (1) is connected with the data acquisition module (8) for wirelessly transmitting the measurement signal, the antenna (1) extends out of the upper bearing plate (4) and the protective shell (10), a signal indicator lamp (11) used for indicating whether communication is normal or not is connected with the wireless communication module (9), a reset button (12) for resetting is electrically connected with a switch button (13) for switching, and the signal indicator lamp (11), the reset button (12) and the switch button (13) are electrically connected with the sensor (7) on one side.

2. The wireless measurement device for the mine exploitation similar material simulation experiment as claimed in claim 1, wherein preferably, a rechargeable battery (3) is arranged in the protective casing (10), and the rechargeable battery (3) is electrically connected with the sensor (7), the data acquisition module (8) and the wireless communication module (9).

3. The wireless measurement device for the simulation experiment of the similar materials in mining of the claim 2, characterized in that: one side of the protective shell (10) is provided with a charging socket (5), and the charging socket (5) is electrically connected with the rechargeable battery (3).

4. The wireless measurement device for the simulation experiment of the similar materials in mining of the claim 1, characterized in that: elastic element (14) are the aluminum alloy plate, deformation detecting element (15) are bridge type force sensitive sensor, bridge type force sensitive sensor is including dividing the first half-bridge resistance strain gauge of establishing between last loading board (4) and elastic element (14) and establishing the second half-bridge resistance strain gauge between elastic element (14) and lower loading board (6).

5. The wireless measurement device for the simulation experiment of the similar materials in mining of the claim 4, is characterized in that: the width of aluminium alloy plate is not more than go up the width of loading board (4), the width of aluminium alloy plate is less than go up the length of loading board (4), and first half-bridge resistance strain gauge and second half-bridge resistance strain gauge are the half-bridge resistance strain gauge of 45 degrees silk bars, the output sensitivity of bridge type force sensor is 2.0mV/V, and the comprehensive precision is superior to 0.05%.

6. The wireless measurement device for the simulation experiment of the similar materials in mining of the claim 1, characterized in that: the data acquisition module (8) comprises an A/D conversion chip for converting the measurement signal from an analog signal to a digital signal and a single chip microcomputer for signal processing, the display resolution of the data acquisition module (8) is 0.01kg, and the sampling rate is 5 times/s.

7. The wireless measurement device for the simulation experiment of the similar materials in mining of the claim 1, characterized in that: the wireless communication module (9) comprises a 2.4G wireless communication unit and a USB communication interface, and the USB communication interface is arranged on one side of the protective shell.

8. The wireless measurement device for the simulation experiment of the similar materials in mining of the claim 1, characterized in that: the external dimension of the wireless measuring device is 200mm multiplied by 30mm multiplied by 40mm in length, width and height, and the measuring range is 100kg.

9. The wireless measurement device for the similar material simulation experiment of the mining of the claim 1, characterized in that: the upper bearing plate (4) and the lower bearing plate (6) are both made of steel plates with the thickness of 9mm, the rechargeable battery (3) is a 7.4V/1000mAh lithium ion battery, the data acquisition module (8) comprises a memory, and the memory comprises one or more of a Read Only Memory (ROM), a Random Access Memory (RAM), a flash memory or an Electrically Erasable Programmable Read Only Memory (EEPROM).

10. A measuring method using the wireless measuring device for the simulation experiment of the mining similar materials in any one of the claims 1 to 9, comprising the steps of:

in the first step: placing a lower bearing plate (6) of the wireless measuring device on a flat bearing surface, and laying a similar material model on an upper bearing plate (4);

in the second step: pressing a switch button (13) to start a sensor (7), wherein the sensor (7) generates a measuring signal based on deformation, a data acquisition module (8) acquires the measuring signal, and a wireless communication module (9) wirelessly transmits the measuring signal;