CN109164389A - Coal mine dynamic disaster detection system and its collecting method and wireless charging method - Google Patents
Coal mine dynamic disaster detection system and its collecting method and wireless charging method Download PDFInfo
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- CN109164389A CN109164389A CN201810823787.XA CN201810823787A CN109164389A CN 109164389 A CN109164389 A CN 109164389A CN 201810823787 A CN201810823787 A CN 201810823787A CN 109164389 A CN109164389 A CN 109164389A
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- mobile terminal
- sensing device
- wireless charging
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention relates to wireless chargings and data wireless communication technical field, more particularly to coal mine dynamic disaster detection system and its collecting method and wireless charging method, including monitoring center and several front end sensing devices for being laid in underground, monitoring center passes through the collected data of acquisition for mobile terminal front end sensing device；Power transmission is carried out by charge switch circuit between the DC power supply and wireless charging transmit circuit of mobile terminal；Charge switch circuit generates corresponding on-off model when being opened or closed and is sent to terminal control unit；The connection of the signal input part of wireless communication receiver module and terminal control unit；Terminal control unit controls the working condition of wireless communication receiver module according to on-off model；Front end sensing device includes sensor and front controller, and the signal output end of front controller is connected with wireless communication sending module.The invention avoids the layings of cable, reducing the construction costs, and improve the safety of data acquisition.
Description
Technical field
The present invention relates to wireless chargings and data wireless communication technical field more particularly to coal mine dynamic disaster detection system
And its collecting method and wireless charging method.
Background technique
How basic power source and important source material of the coal as China safely and efficiently produce and are constantly subjected to the extensive of its people
Concern.The exploitation of mine severe complicated working environment and long-time excess load, causes equipment fault to take place frequently, therefore equipment is tieed up
Protecting system seems most important in coal enterprise's modern production.Equipment Condition Monitoring System is from equipment running status signal
Effective information and parameter are extracted, initial data is provided for equipment maintenance system, so that maintenance personal understands the fortune of equipment at any time
Row state improves equipment dependability and utilization rate, while avoiding maintenance insufficient and repairing superfluous.
Traditional coal mine equipment monitoring system mostly uses cable network, needs to be laid with a large amount of cables, there is wiring complexity, extension
Property it is poor, easy to damage the disadvantages of, increase generation explosion and a possibility that fire, be unfavorable for underground coal mine ring complicated and changeable
Border.With the rapid development of semiconductor technology, sensor technology, embedded technology and the communication technology, have perception, calculate,
Storage and the wireless sensor network of communication capacity are using more and more extensive.Wireless sensor network can make up biography well
The above-mentioned shortcoming of the monitoring system of system real-time monitoring and can feed back coal mine equipment position and running state information, convenient for dimension
It repairs personnel to analyze equipment state, timely discovering device failure simultaneously repairs, and can also verify the conjunction of underground engineering design
Rationality avoids the generation of big accident, guarantees that safety of coal mines efficiently produces.
In view of this, how to utilize prior art design is a should support wireless charging suitable for underground engineering construction
Data transmission, while the intelligent receive-transmit system that can be also shown, be read to the data of acquisition are supported again, become urgently to be resolved
The problem of.
Summary of the invention
In view of the above shortcomings of the prior art, the present invention provides the solution of coal mine dynamic disaster detection system and leads in the prior art
Cable network is crossed to carry out wiring complexity caused by data acquisition or wired power supply mode, there is technical issues that；
Wireless charging and wireless data transmission can be supported simultaneously, are avoided the laying of wire cable, are substantially reduced construction cost, mention
The safety of high data acquisition.
In order to solve the above technical problems, technical scheme is as follows:
A kind of coal mine dynamic disaster detection system is provided first, including monitoring center and several front ends for being laid in underground
Sensing device, monitoring center pass through the collected data of acquisition for mobile terminal front end sensing device；
The mobile terminal includes terminal control unit, DC power supply, wireless charging transmit circuit, wireless communication receiver module
And charge switch circuit；Power transmission is carried out by charge switch circuit between DC power supply and wireless charging transmit circuit；
Charge switch circuit can generate corresponding on-off model when being opened or closed and be sent to terminal control unit；Wireless communication
The connection of the signal input part of receiving module and terminal control unit；Terminal control unit can be controlled according to on-off model and be wirelessly communicated
The working condition of receiving module；
Front end sensing device includes sensor and front controller, and the signal output end of front controller is connected with channel radio
Believe sending module；It further include rechargeable battery, the power input of the rechargeable battery is connected with wireless charging and receives circuit.
Preferably, it is configured with operating mode switching module in terminal control unit, controls the work of wireless communication receiver module
State, to realize the switching of wireless charging operating mode Yu data acquisition operating mode.
Preferably, the mobile terminal further includes shell；The wireless communication receiver module and wireless charging transmitter
Two opposite ends of shell are separately positioned on, are additionally provided in the shell positioned at wireless communication receiver module and wireless charging transmitting
Signal shielding baffle between device.
Preferably, the front end sensing device further includes the electric power detection module for detecting rechargeable battery electricity, electricity
The signal input part of the signal output end and front controller of measuring detection module connects.
Preferably, the front end sensing device further includes the temperature sensor for detecting front end sensing device, and temperature passes
The signal output end of sensor and the signal input part of front controller connect.
The present invention also provides a kind of collecting methods using above-mentioned coal mine dynamic disaster detection system, to solve such as
Where the acquisition of data is completed in underground residence time shortest situation, and concrete scheme is as follows: the following steps are included:
Step 1: disconnecting charge switch circuit, make mobile terminal work in data acquisition operating mode；
Step 2: mobile terminal and front end sensing device establish data connection, and front end sensing device sends to mobile terminal and wraps
Include the reference information of the current electric quantity of rechargeable battery and the data volume size of sensing data to be sent；
Step 3: the reference information in mobile terminal receiving step 2, terminal control unit calculate front end according to reference information and pass
Induction device has sent sensing data institute's electricity demand and required time to be sent；
Step 4: if the current electric quantity of rechargeable battery is greater than or equal to front end sensing device and has sent sensing to be sent
Data institute electricity demand, then mobile terminal starts to receive sensing data, until finishing receiving；If the current electric quantity of rechargeable battery is small
In having received sensing data institute electricity demand to be sent, then step 5 is carried out；
Step 5: front end sensing device is charged to satisfaction from current electric quantity and has sent sensing data institute to be sent by calculating
The charging time of electricity demand, and it is closed charge switch circuit, mobile terminal is switched to wireless charging operating mode, passes for front end
Induction device charges；
Step 6: after the charging time, disconnecting charge switch circuit, mobile terminal is switched to data acquisition work
Mode receives sensing data, until finishing receiving.
Wherein, the operating mode switching module configured in terminal control unit controls the work shape of wireless communication receiver module
The method of state are as follows: when charge switch circuit closure, it is powered between DC power supply and wireless charging transmit circuit, wireless charging electrician
Operation mode starting, charge switch circuit send first switch amount signal to terminal control unit, and terminal control unit receives first switch
The instruction for stopping reception data is sent to wireless communication receiver module after measuring signal；
It is breaking between DC power supply and wireless charging transmit circuit when charge switch circuit disconnects, charge switch circuit
Second switch amount signal is sent to terminal control unit, terminal control unit receives after second switch amount signal to wireless communication receiver mould
Block sends the instruction for starting to receive data, the starting of data acquisition operating mode.
The present invention also provides a kind of wireless charging methods using above-mentioned coal mine dynamic disaster detection system, to solve such as
What controls charging temperature to ensure the technical problem of charging safety, and concrete scheme is as follows: wireless charging operating mode is discontinuity
It charges, is switched to data acquisition operating mode after every charging T time, carry out as follows:
Step 101: closure charge switch circuit, mobile terminal are switched to wireless charging operating mode, after the T time that charges,
Charge switch circuit is disconnected, makes mobile terminal work in data acquisition operating mode；
Step 102: mobile terminal and front end sensing device establish data connection, and front end sensing device is sent to mobile terminal
The Current Temperatures of current electric quantity and front end sensing device including rechargeable battery；
Step 103: judging whether the current electric quantity of rechargeable battery reaches charge requirement；If so, terminating charging；If
It is no, then enter step 104:
Step 104: if the Current Temperatures of front end sensing device are greater than reliability temperature threshold, carrying out step 105；If front end
The Current Temperatures of sensing device are not more than reliability temperature threshold, then carry out step 106；
Step 105: carrying out reducing being used as when previous charge power on the basis of previous charge power, and return to step
101；
Step 106: using previous charge power as previous charge power is worked as, and returning to step 101.
Compared with prior art, the invention has the following advantages:
1, mobile terminal of the invention can be brought into underground job place by staff, adopted when needing to acquire data
It after the completion of collection, then takes mobile terminal out of underground job place, the collected data of mobile terminal is then passed through into wired or nothing
Line transmission mode is transmitted to monitoring center, wire transmission network of the construction ground on the one hand avoided in this way to underground, another party
Face directly transmits data compared to wireless sensor network is relied between front end sensing device and monitoring center, can be avoided underground
Data transmission fails caused by signal difference or wireless sensor network failure.
2, mobile terminal of the invention and front end sensing device are able to carry out wireless communication to carry out data transmission, meanwhile,
Mobile terminal can also carry out wireless charging for front end sensing device, avoid the laying of wire cable in this way, substantially reduce and build
It is set as this, improves the safety of data acquisition.
3, operating mode changeover program of the invention, avoids wireless charging operating mode and data acquisition Working mould
Formula carries out simultaneously, so that electromagnetic wave signal when avoiding wireless charging generates electromagnetic interference to data acquisition, to guarantee
Data acquisition is normally carried out.Operating mode of the invention switches by the way of soft or hard combination, need to only control charge switch electricity
Road uses the opening and closing of switch that switching can be realized, and structure is simple, can save hardware cost, and switching control is convenient, realizes
One key control.
4, since underground work has biggish risk, the shortening underground residence time has protection personal safety
Significance.Collecting method of the invention not only ensure that the completion of data acquisition, but also shorten underground stop to greatest extent
Time, it is ensured that data acquisition requires the remaining capacity of front end sensing device that can support to the whole of data to be sent
It sends, therefore is not required for front end sensing device and is completely filled with electricity, so as to be stopped by shortening the charging time to shorten underground
The total time (including charging time and data acquisition time) stayed.
5, since often there is also certain imflammable gas for subsurface environment, and charging is carried out to front end sensing device and will lead to
Front end sensing device temperature increases, and there are the nothings that biggish security risk, especially wireless charging will lead to front end sensing device
Temperature sensor is arranged to front end in the calorific value with higher of line charge electricity receiver, therefore the safety in order to guarantee charging process
Sensing device carries out temperature monitoring, additionally, due to wireless charging operating mode and data acquisition operating mode cannot simultaneously into
Row, prevent temperature mobile terminal carries out the real-time adjustment of charge power from obtaining the temperature of front end sensing device in real time, in order to
It solves the problems, such as this, is obtained for wireless monitor system targeted design of the invention discontinuity wireless charging mode, discontinuity
Temperature information is taken to carry out the regulation of charge power.
6, charge power of the invention regulation is not necessarily to founding mathematical models, need to only carry out on the basis of previous charge power
Gradually adjust, it is very convenient simple, it is easy to accomplish.
Detailed description of the invention
Fig. 1 is the functional block diagram of mobile terminal in specific embodiment；
Fig. 2 is the data flow figure in specific embodiment for the wireless monitor system of underground job；
Fig. 3 is the operation schematic diagram of underground work in specific embodiment.
Specific embodiment
It is described in conjunction with the embodiments the specific technical solution of the present invention.
Embodiment 1
As shown in Figure 1, coal mine dynamic disaster detection system, fills including monitoring center and the front end sensing for being laid in underground
It sets, monitoring center passes through the collected data of acquisition for mobile terminal front end sensing device；The mobile terminal is assisted by USB interface
View is connect with the host equipment of monitoring center, to realize the transmission of data；Mobile terminal is sensed by QI/WPC agreement forward end
Device emits electromagnetic wave；Mobile terminal carries out wireless data transmission by TransferJet agreement and front end sensing device；
As shown in Fig. 2, the mobile terminal includes terminal control unit, DC power supply, wireless charging transmit circuit, channel radio
Believe receiving module and charge switch circuit；It is carried out between DC power supply and wireless charging transmit circuit by charge switch circuit
Power transmission；Charge switch circuit can generate corresponding on-off model when being opened or closed and be sent to controller；Nothing
The connection of the signal input part of line communication receipt module and terminal control unit；Terminal control unit can control nothing according to on-off model
The working condition of line communication receipt module；
The front end sensing device includes sensor and front controller, and the signal output end of front controller is connected with nothing
Line communicates sending module；It further include rechargeable battery, the power input of the rechargeable battery is connected with wireless charging reception
Circuit.
In present embodiment, it is connected between the terminal control unit and wireless communication receiver module for controlling number
According to the interrupt control unit for receiving priority.In this way, being interrupted when multiple front end sensing devices send data to mobile terminal simultaneously
Controller can control the orderly carry out data receiver of wireless data receipt modules according to the priority of data.
In present embodiment, operating mode changeover program is configured in terminal control unit, and control as follows
The working condition of wireless communication receiver module, to realize cutting for wireless charging operating mode and data acquisition operating mode
It changes:
When charge switch circuit closure, it is powered between DC power supply and wireless charging transmit circuit, wireless charging work
Mode starting, charge switch circuit send first switch amount signal to terminal control unit, and terminal control unit receives first switch amount
The instruction for stopping receiving data is sent after signal to wireless communication receiver module；
It is breaking between DC power supply and wireless charging transmit circuit when charge switch circuit disconnects, charge switch circuit
Second switch amount signal is sent to terminal control unit, terminal control unit receives after second switch amount signal to wireless communication receiver mould
Block sends the instruction for starting to receive data, the starting of data acquisition operating mode.
The wireless charging transmit circuit includes inverter circuit and wireless charging transmitter；Inverter circuit can be by direct current
The DC inverter of power supply is alternating current, and exports exchange and supply electricity to wireless charging transmitter；Wireless charging transmitter can will be electric
The electromagnetic wave to external radiation can be converted into.
The mobile terminal further includes shell；The wireless communication receiver module and wireless charging transmitter are respectively set
In two opposite ends of shell, it is additionally provided between wireless communication receiver module and wireless charging transmitter in the shell
Signal shielding baffle.
It includes wireless charging receiver and rectification circuit that the wireless charging, which receives circuit,；The wireless charging receiver
Electromagnetic wave can be received and induce exchange electricity output to rectification circuit；AC conversion can be direct current by rectification circuit,
To power for rechargeable battery.
The front end sensing device further includes the electric power detection module for detecting rechargeable battery electricity, electric power detection mould
The signal output end of block and the signal input part of front controller connect.
The operating mode of coal mine dynamic disaster detection system, by taking mine operation as an example, as shown in figure 3, before the first in figure
End sensing device 2, second of front end sensing device 3 are embedded in tunnel, and it is lower to mine that staff carries mobile terminal 1
It is interior, wireless charging periodically is carried out to the first front end sensing device 2, second of front end sensing device 3: starting charge switch electricity
Road just can carry out wireless charging to the first front end sensing device 2, second of front end sensing device 3；After charging complete, disconnect
Charge switch circuit just can automatically switch to data acquisition mode, simplify the operating process of user, realize two kinds of works
The simple and fast switching of operation mode.
Switch used by charge switch circuit can be button switch, touch switch etc., when using touch switch, move
Dynamic terminal needs to configure corresponding display screen, and touch switch is arranged on a display screen, display screen can also be arranged operating mode show,
Data transmission schedule is shown, charging progress is shown.
In order to meet the manual switching and automatic switchover of operating mode simultaneously, a hand is used also in charge switch circuit
Dynamic switch (such as above-mentioned button switch, touch switch) is connected with an electric-controlled switch, and such as electromagnetic relay, manual switch is normal
Open type, electric-controlled switch are normally closed type, and such first switch amount signal is the signal that manual switch and electric-controlled switch are closed at, the
Two on-off models are the signal that one of manual switch and electric-controlled switch disconnect.
Using the collecting method of the coal mine dynamic disaster detection system in this concrete mode, comprising the following steps:
Step 1: disconnecting charge switch circuit, make mobile terminal work in data acquisition operating mode；
Step 2: mobile terminal and front end sensing device establish data connection, and front end sensing device sends to mobile terminal and wraps
Include the reference information of the current electric quantity of rechargeable battery and the data volume size of sensing data to be sent；
Step 3: the reference information in mobile terminal receiving step 2, terminal control unit calculate front end according to reference information and pass
Induction device has sent sensing data institute's electricity demand and required time to be sent；
Step 4: if the current electric quantity of rechargeable battery is greater than or equal to front end sensing device and has sent sensing to be sent
Data institute electricity demand, then mobile terminal starts to receive sensing data, until finishing receiving；If the current electric quantity of rechargeable battery is small
In having received sensing data institute electricity demand to be sent, then step 5 is carried out；
Step 5: front end sensing device is charged to satisfaction from current electric quantity and has sent sensing data institute to be sent by calculating
The charging time of electricity demand, and it is closed charge switch circuit, mobile terminal is switched to wireless charging operating mode and (persistently fills
Electricity, intermediate free of discontinuities until charging complete), it charges for front end sensing device；
Step 6: after the charging time, disconnecting charge switch circuit, mobile terminal is switched to data acquisition work
Mode receives sensing data, until finishing receiving.
Embodiment 2
Present embodiment and the institute of specific embodiment 1 the difference is that: the front end sensing device further includes using
In the temperature sensor of detection front end sensing device, the signal output end of temperature sensor and the signal input part of front controller
Connection.
Collecting method and specific reality using the wireless monitor system for underground job of present embodiment
Apply the collecting method in mode 1 the difference is that, in step 5 wireless charging operating mode be discontinuity charging, often
It is switched to data acquisition operating mode after charging T time, is carried out as follows:
Step 101: closure charge switch circuit, mobile terminal are switched to wireless charging operating mode, after the T time that charges,
Charge switch circuit is disconnected, makes mobile terminal work in data acquisition operating mode；
Step 102: mobile terminal and front end sensing device establish data connection, and front end sensing device is sent to mobile terminal
The Current Temperatures of current electric quantity and front end sensing device including rechargeable battery；
Step 103: judging whether the current electric quantity of rechargeable battery reaches charge requirement；If so, terminating charging；If
It is no, then enter step 104:
Step 104: if the Current Temperatures of front end sensing device are greater than reliability temperature threshold, carrying out step 105；If front end
The Current Temperatures of sensing device are not more than reliability temperature threshold, then carry out step 106；
Step 105: carrying out reducing being used as when previous charge power on the basis of previous charge power, and return to step
101；
Step 106: using previous charge power as previous charge power is worked as, and returning to step 101.
Collecting method in present embodiment has fully considered charging due to combining discontinuity charge mode
The heating problem of process, so that the data acquisition for needing to charge is safer.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to the technology of invention
Scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered in this hair
In bright scope of the claims.
Claims (8)
1. coal mine dynamic disaster detection system, which is characterized in that passed including monitoring center and several front ends for being laid in underground
Induction device, monitoring center pass through the collected data of acquisition for mobile terminal front end sensing device；
The mobile terminal include terminal control unit, DC power supply, wireless charging transmit circuit, wireless communication receiver module and
Charge switch circuit；Power transmission is carried out by charge switch circuit between DC power supply and wireless charging transmit circuit；Charging
Switching circuit can generate corresponding on-off model when being opened or closed and be sent to terminal control unit；Wireless communication receiver
The connection of the signal input part of module and terminal control unit；Terminal control unit can control wireless communication receiver according to on-off model
The working condition of module；
Front end sensing device includes sensor and front controller, and the signal output end of front controller is connected with wireless communication hair
Send module；It further include rechargeable battery, the power input of the rechargeable battery is connected with wireless charging and receives circuit.
2. coal mine dynamic disaster detection system according to claim 1, which is characterized in that the mobile terminal further includes shell
Body；The wireless communication receiver module and wireless charging transmitter are separately positioned on two opposite ends of shell, in the shell
The signal shielding baffle being additionally provided between wireless communication receiver module and wireless charging transmitter.
3. coal mine dynamic disaster detection system according to claim 1, which is characterized in that the front end sensing device also wraps
Include the electric power detection module for detecting rechargeable battery electricity, the signal output end of electric power detection module and front controller
Signal input part connection.
4. coal mine dynamic disaster detection system according to claim 1, which is characterized in that the front end sensing device also wraps
The temperature sensor for detecting front end sensing device is included, the signal output end of temperature sensor and the signal of front controller are defeated
Enter end connection.
5. coal mine dynamic disaster detection system according to claim 1, which is characterized in that match in the terminal control unit
Be equipped with operating mode switching module, control the working condition of wireless communication receiver module, with realize wireless charging operating mode with
The switching of data acquisition operating mode.
6. according to claim 1 to the collecting method of 5 described in any item coal mine dynamic disaster detection systems, feature exists
In, comprising the following steps:
Step 1: disconnecting charge switch circuit, make mobile terminal work in data acquisition operating mode；
Step 2: mobile terminal and front end sensing device establish data connection, and front end sensing device includes to mobile terminal transmission can
The reference information of the current electric quantity of rechargeable battery and the data volume size of sensing data to be sent；
Step 3: the reference information in mobile terminal receiving step 2, terminal control unit calculate front end sensing dress according to reference information
It sets and has sent sensing data institute's electricity demand and required time to be sent；
Step 4: if the current electric quantity of rechargeable battery is greater than or equal to front end sensing device and has sent sensing data to be sent
Institute's electricity demand, then mobile terminal starts to receive sensing data, until finishing receiving；It is connect if the current electric quantity of rechargeable battery is less than
Sensing data institute electricity demand to be sent is harvested, then carries out step 5；
Step 5: calculating and front end sensing device is charged to electricity needed for satisfaction has sent sensing data to be sent from current electric quantity
The charging time of amount, and it is closed charge switch circuit, mobile terminal is switched to wireless charging operating mode, for front end sensing dress
It sets and charges；
Step 6: after the charging time, charge switch circuit is disconnected, mobile terminal is switched to data acquisition operating mode,
Sensing data is received, until finishing receiving.
7. the collecting method of coal mine dynamic disaster detection system according to claim 6, which is characterized in that mobile whole
End controls the working condition of wireless communication receiver module as follows, to realize that wireless charging operating mode and wireless data are adopted
Collect the switching of operating mode:
When charge switch circuit closure, it is powered between DC power supply and wireless charging transmit circuit, wireless charging operating mode
Starting, charge switch circuit send first switch amount signal to terminal control unit, and terminal control unit receives first switch amount signal
The instruction for stopping receiving data is sent to wireless communication receiver module afterwards；
Breaking between DC power supply and wireless charging transmit circuit when charge switch circuit disconnects, charge switch circuit is sent
Second switch amount signal to terminal control unit, send out after receiving second switch amount signal to wireless communication receiver module by terminal control unit
Send the instruction for starting to receive data, the starting of data acquisition operating mode.
8. according to claim 1 to the wireless charging method of 5 described in any item coal mine dynamic disaster detection systems, feature exists
In, comprising the following steps: wireless charging operating mode is discontinuity charging, is switched to data acquisition after every charging T time
Operating mode carries out as follows:
Step 101: closure charge switch circuit, mobile terminal are switched to wireless charging operating mode, after the T time that charges, disconnect
Charge switch circuit makes mobile terminal work in data acquisition operating mode；
Step 102: mobile terminal and front end sensing device establish data connection, and front end sensing device includes to mobile terminal transmission
The current electric quantity of rechargeable battery and the Current Temperatures of front end sensing device；
Step 103: judging whether the current electric quantity of rechargeable battery reaches charge requirement；If so, terminating charging；If it is not, then
Enter step 104:
Step 104: if the Current Temperatures of front end sensing device are greater than reliability temperature threshold, carrying out step 105；If front end senses
The Current Temperatures of device are not more than reliability temperature threshold, then carry out step 106；
Step 105: carrying out reducing being used as when previous charge power on the basis of previous charge power, and return to step 101；
Step 106: using previous charge power as previous charge power is worked as, and returning to step 101.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810823787.XA CN109164389A (en) | 2018-07-25 | 2018-07-25 | Coal mine dynamic disaster detection system and its collecting method and wireless charging method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810823787.XA CN109164389A (en) | 2018-07-25 | 2018-07-25 | Coal mine dynamic disaster detection system and its collecting method and wireless charging method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110570639A (en) * | 2019-08-20 | 2019-12-13 | 杨田荣 | Rapid state detection system and detection method |
| CN113008221A (en) * | 2019-12-18 | 2021-06-22 | 中移物联网有限公司 | Antenna attitude test device, method and system |
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| CN106602734A (en) * | 2017-03-09 | 2017-04-26 | 南华大学 | Deep mine wireless power transmission device |
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| CN104219383A (en) * | 2014-08-20 | 2014-12-17 | 小米科技有限责任公司 | Terminal power information prompting method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110570639A (en) * | 2019-08-20 | 2019-12-13 | 杨田荣 | Rapid state detection system and detection method |
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Application publication date: 20190108 |