CN112096352B - Intelligent pipe network pressure regulation and control system for coal mine gas extraction - Google Patents
Intelligent pipe network pressure regulation and control system for coal mine gas extraction Download PDFInfo
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- CN112096352B CN112096352B CN202010823719.0A CN202010823719A CN112096352B CN 112096352 B CN112096352 B CN 112096352B CN 202010823719 A CN202010823719 A CN 202010823719A CN 112096352 B CN112096352 B CN 112096352B
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- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
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Abstract
The invention provides a coal mine gas extraction intelligent pipe network pressure regulation and control system, which comprises M pressure regulating valves arranged on a pipe network, namely a1 st pressure regulating valve, a 2 nd pressure regulating valve, a 3 rd pressure regulating valve, … … and an Mth pressure regulating valve, wherein M is a positive integer greater than or equal to 1, the Mth pressure regulating valve comprises a pressure sensor, a pressure valve, a controller and a wireless transceiving module, M is a positive integer less than or equal to M, the pressure signal output end of the pressure sensor is connected with the pressure signal input end of the controller, the flow regulating end of the controller is connected with the regulating input end of the pressure valve, and the data transceiving end of the wireless transceiving module is connected with the data transceiving end of the controller. The method can automatically determine the pipe section with abnormal pressure of the extraction pipe network when the negative pressure of the extraction pipe network is abnormal, and execute corresponding operation to automatically adjust the pressure of the pipe network, thereby preventing the reduction of the operation efficiency and the occurrence of safety accidents.
Description
Technical Field
The invention relates to the technical field of coal mines, in particular to a coal mine gas extraction intelligent pipe network pressure regulation and control system.
Background
The gas refers to hydrocarbon gas which is stored in a coal bed, takes methane as a main component, is adsorbed on the surface of coal matrix particles as a main component, is partially dissociated in coal pores or is dissolved in coal bed water, and is an associated mineral resource of coal. Gas is one of the most main potential safety hazards in the coal mining process, and the death number of gas accidents such as coal and gas outburst, gas explosion and the like accounts for more than half of the total death number of coal mine accidents for a long time. Meanwhile, the calorific value of the gas is equivalent to that of natural gas, is 2-5 times of that of general coal, is clean after combustion, hardly generates any waste gas, and is a superior industrial, chemical, power generation and resident life fuel. The gas is directly discharged into the atmosphere, the greenhouse effect of the gas is about 21 times of that of carbon dioxide, and the gas is extremely destructive to the ecological environment. Therefore, the method has multiple meanings of ensuring production safety, energy supply and environmental protection by developing and utilizing the gas generated in the coal bed.
Gas extraction is the most important means for preventing and treating gas accidents and developing gas resources. The coal mine gas extraction utilizes an extraction pump to generate negative pressure, the negative pressure is transmitted to a drill hole by a gas extraction pipe network, and the gas extracted from the drill hole is conveyed to the ground. The negative pressure of the gas extraction pipe network is adjusted in a reasonable interval, and the method has important significance for improving the operation efficiency, economy and safety of the whole gas extraction system. However, the negative pressure regulation of the current coal mine gas extraction pipe network depends on manual regulation, and an intelligent pipe network pressure regulation and control system is urgently needed, so that the pressure of the pipeline which is judged to be abnormal in pressure can be automatically regulated through automatic monitoring and judgment of pipe network operation parameters.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, and particularly innovatively provides an intelligent pipe network pressure regulating and controlling system for coal mine gas extraction.
In order to achieve the purpose, the invention provides a coal mine gas extraction intelligent pipe network pressure regulation and control system, which comprises M pressure regulating valves arranged on a pipe network, wherein the M pressure regulating valves are respectively a1 st pressure regulating valve, a 2 nd pressure regulating valve, a 3 rd pressure regulating valve, … … and an Mth pressure regulating valve, M is a positive integer greater than or equal to 1, the Mth pressure regulating valve comprises a pressure sensor, a pressure valve, a controller and a wireless transceiving module, M is a positive integer less than or equal to M, the pressure signal output end of the pressure sensor is connected with the pressure signal input end of the controller, the flow regulating end of the controller is connected with the regulating input end of the pressure valve, and the data transceiving end of the wireless transceiving module is connected with the data transceiving end of the controller;
the controller receives the pressure monitoring value sent by the cloud server through the wireless receiving and sending module to serve as a pressure preset threshold value; the pressure preset threshold comprises a pressure preset first threshold and a pressure preset second threshold, and the pressure preset second threshold is greater than the pressure preset first threshold;
when the pressure value that its pressure sensor monitored is less than or equal to pressure and predetermines first threshold value, perhaps the pressure value that pressure sensor monitored is greater than or equal to pressure and predetermines the second threshold value, then the controller sends the pressure value that pressure sensor monitored to the high in the clouds server through wireless transceiver module, and after the high in the clouds server received this pressure value, the high in the clouds server judged the relation between received pressure value and the pressure monitoring value that sends to pressure regulating valve:
if the pressure value received by the cloud server is smaller than or equal to the first pressure monitoring value sent to the pressure regulating valve, the cloud server sends a regulating signal to the pipe network master control valve to increase the pressure value of the pipe network;
and if the pressure value received by the cloud server is greater than or equal to the second pressure monitoring value sent to the pressure regulating valve, the cloud server sends a regulating signal to the pipe network master control valve, so that the pressure value of the pipe network is reduced.
When the pressure value monitored by the pressure sensor is greater than a preset pressure first threshold value and less than a preset pressure second threshold value, the controller sends an opening degree adjusting command to the pressure valve.
In a preferred embodiment of the invention, the mth pressure regulating valve further comprises a temperature sensor, and a temperature signal output end of the temperature sensor is connected with a temperature signal input end of the controller.
In a preferred embodiment of the present invention, the pressure sensor includes: a first terminal of the resistor R15 is connected to a base of a transistor Q3, an emitter of the transistor Q3 is connected to a power ground, a collector of the transistor Q3 is connected to a first terminal of a resistor R13 and a first terminal of a resistor R14, a second terminal of the resistor R14 is connected to a +12V power supply voltage and a drain of the fet Q1, a second terminal of the resistor R13 is connected to a gate of the fet Q1, a source of the fet Q1 is connected to a first terminal of a resistor R6 and a cathode of a diode D1, a second terminal of the resistor R6 is connected to an emitter of the transistor Q2 and an inverting input terminal of the amplifier U1A, a collector of the transistor Q2 is connected to a power input terminal of the pressure detecting element U2, a base of the transistor Q2 is connected to a first terminal of the resistor R5, a second terminal of the resistor R6 is connected to a positive terminal of the amplifier U1A, an input terminal of the amplifier U1A is connected to a positive terminal of the diode D1 and a first terminal of the resistor R16, a second end of the resistor R16 is connected to a cathode of the diode D2 and an anode of the diode D3, an anode of the diode D2 is connected to the power ground, a cathode of the diode D3 is connected to a first end of the resistor R1 and a first end of the resistor R2, a second end of the resistor R1 is connected to the power ground, a second end of the resistor R2 is connected to a first end of the adjustable resistor R4 and an inverting input of the amplifier U1B, a second end of the adjustable resistor R4 is connected to an output of the amplifier U1B and a non-inverting input of the amplifier U1D, a non-inverting input of the amplifier U1B is connected to a first end of the resistor R3, and a second end of the resistor R3 is connected to the power ground; the power ground terminal of the pressure detecting element U2 is connected with the power ground, the first signal output terminal of the pressure detecting element U2 is connected with the first terminal of the resistor R7, the second signal output terminal of the pressure detecting element U2 is connected with the first terminal of the resistor R8, the second terminal of the resistor R7 is respectively connected with the inverting input terminal of the amplifier U1C and the first terminal of the resistor R10, the second terminal of the resistor R8 is respectively connected with the non-inverting input terminal of the amplifier U1C and the first terminal of the resistor R9, the second terminal of the resistor R9 is connected with the power ground, the second terminal of the resistor R10 is respectively connected with the output terminal of the amplifier U1C and the first terminal of the resistor R11, the second terminal of the resistor R11 is respectively connected with the first terminal of the adjustable resistor R12 and the inverting input terminal of the amplifier U1D, the second end of the adjustable resistor R12 and the output end of the amplifier U1D are respectively connected with the pressure signal input end of the controller, and the second end of the resistor R15 is connected with the pressure working output end of the controller. A voltage regulator tube D1, an amplifier U1A, a resistor R5, a resistor R6 and a triode Q2 form a current source, and stable current input is provided for a pressure detection element U2; a primary amplifying circuit consisting of an amplifier U1C and a resistor R7-resistor R10 is used for primarily amplifying the pressure signal output by the pressure detecting element U2; the temperature compensation circuit composed of the amplifier U1B, the diode D3, the resistor R1-resistor R3 and the adjustable resistor R4 performs zero temperature compensation on the amplifier, reduces the error of the amplifier, and the amplifier U1D, the resistor R11 and the resistor R12 form a secondary amplification circuit for amplifying and adjusting pressure signals, so that the controller can receive the pressure signals conveniently.
In a preferred embodiment of the present invention, the wireless transceiver module includes: a power supply end VBAT1 of the wireless transceiving chip U9 is respectively connected with a first end of a capacitor C45, a first end of a resistor R144, a first end of a capacitor C65, a first end of a capacitor C66 and a voltage OUTPUT end OUTPUT of the voltage conversion chip U11, a second end of a capacitor C45, a second end of a capacitor C65 and a second end of a capacitor C66 are respectively connected with a power ground, a second end of the resistor R144 is connected with an anode of a power indicator LED3, and a cathode of the power indicator LED3 is connected with the power ground; a power supply voltage INPUT end INPUT of the voltage conversion chip U11 is respectively connected with a first end of a capacitor C64, a first end of a capacitor C65 and a voltage end VDD, and a second end of a capacitor C64, a second end of a capacitor C65 and a grounding end of the voltage conversion chip U11 are respectively connected with a power supply ground; a transmitting and receiving signal terminal RFI _ LF of the wireless transmitting and receiving chip U9 is respectively connected to a first terminal of an inductor L10 and a first terminal of an inductor L11, a second terminal of the inductor L11 is connected to a power ground, a second terminal of the inductor L10 is respectively connected to a first terminal of a capacitor C40 and a first terminal of a capacitor C42, a second terminal of the capacitor C42 is connected to the power ground, a second terminal of the capacitor C40 is connected to a first terminal of a capacitor C41, and a second terminal of the capacitor C41 is connected to a signal terminal RF1 of the transmitting and receiving switch U7; a transmitting and receiving signal end RFO _ LF of the wireless transmitting and receiving chip U9 is connected with a first end of an inductor L13, a second end of the inductor L13 is respectively connected with a first end of the inductor L17, a first end of the inductor L18, a first end of a capacitor C51 and a first end of a capacitor C55, a second end of the capacitor C55 is connected with a power ground, a second end of the capacitor C51 is connected with a first end of an inductor L14, a second end of the inductor L14 is respectively connected with a first end of a capacitor C50, a first end of a capacitor C52 is connected with a first end of an inductor L15, a second end of a capacitor C52 is connected with a power ground, a second end of a capacitor C50 and a second end of an inductor L15 are respectively connected with a first end of a capacitor C49, a first end of a capacitor C53 and a first end of an inductor L16, a second end of the capacitor C53 is connected with the power ground, a second end of a capacitor C49 and a second end of an inductor L16 are respectively connected with a first end of a capacitor C54 and a signal end RF2 of the transceiving switch U7, and a second end of a capacitor C54 is connected with the power ground; a second end of the inductor L18 is respectively connected with a first end of the capacitor C57, a first end of the capacitor C58, a first end of the capacitor C59 and a voltage-stabilizing power supply end VR _ PA of the wireless transceiver chip U9, and a second end of the capacitor C57, a second end of the capacitor C58 and a second end of the capacitor C59 are respectively connected with a power ground; a power supply voltage end VDD of the transceiving switch U7 is connected to a first end and a voltage end VDD of a capacitor C39, a second end of a capacitor C39 is connected to a power ground, a signal transceiving end RFC of the transceiving switch U7 is connected to a first end of a capacitor C46, a second end of a capacitor C46 is connected to a first end of a capacitor C47 and a first end of an inductor L12, a second end of a capacitor C47 is connected to a power ground, a second end of an inductor L12 is connected to a first end of a capacitor C48 and an antenna pad SMA, a second end of a capacitor C48 is connected to the power ground, a control end CTRL of the transceiving switch U7 is connected to a first end of a resistor R9 and a first end of a capacitor C56, a second end of a capacitor C56 is connected to the power ground, and a second end of a resistor R9 is connected to a transceiving control end PB5 of the controller; a power voltage end VBAT2 of the wireless transceiving chip U9 is respectively connected with a first end of the capacitor C60, a first end of the capacitor C61 and a voltage end VDD _ RFS, and a ground end GND of the wireless transceiving chip U9 is respectively connected with a second end of the capacitor C60 and a second end of the capacitor C61 and a power ground; the transmitting and receiving end RFO _ HF of the wireless transmitting and receiving chip U9 and the transmitting and receiving end RFI _ LF of the wireless transmitting and receiving chip U9 are respectively connected with the power ground; a power voltage end VBAT3 of the wireless transceiving chip U9 is respectively connected with a first end of a capacitor C62 and a voltage end VDD _ RFS, and a second end of a capacitor C62 is connected with a power ground; a digital power supply voltage end VR _ DIG of the wireless transceiving chip U9 is connected with a first end of a capacitor C44, and a second end of a capacitor C44 is connected with a power ground; an analog power supply voltage end VR _ ANA of the wireless transceiving chip U9 is connected with a first end of a capacitor C43, and a second end of the capacitor C43 is connected with a power ground; the clock terminal SCK of the wireless transceiving chip U9 is connected with the clock terminal PB13 of the controller, the serial data output terminal MISO of the wireless transceiving chip U9 is connected with the serial data input terminal PB14 of the controller, the serial data input terminal MOSI of the wireless transceiving chip U9 is connected with the serial data output terminal PB15 of the controller, the mode selection input terminal NSS of the wireless transceiving chip U9 is connected with the mode selection output terminal PB12 of the controller, the transceiving control input terminal RXTX/RFMOD of the wireless transceiving chip U9 is connected with the transceiving control output terminal PA7 of the controller, and the reset trigger input terminal NRESET of the wireless transceiving chip U9 is connected with the reset trigger output terminal PA6 of the controller.
In conclusion, due to the adoption of the technical scheme, when the negative pressure of the extraction pipe network is abnormal, the pipe section with abnormal pressure of the extraction pipe network can be automatically determined, corresponding operation is executed to automatically adjust the pressure of the extraction pipe network, and the reduction of the operation efficiency and the occurrence of safety accidents are prevented.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic block diagram of the connection of the present invention.
Fig. 2 is a schematic diagram of the pressure sensor circuit connections of the present invention.
Fig. 3 is a schematic circuit diagram of a wireless transceiver module according to the present invention.
Fig. 4 is a schematic diagram of the controller connections of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The invention provides a coal mine gas extraction intelligent pipe network pressure regulation and control system, which comprises M pressure regulating valves arranged on a pipe network, wherein the M pressure regulating valves are a1 st pressure regulating valve, a 2 nd pressure regulating valve, a 3 rd pressure regulating valve, … … and an Mth pressure regulating valve respectively, the M is a positive integer larger than or equal to 1, the Mth pressure regulating valve comprises a pressure sensor, a pressure valve, a controller and a wireless transceiving module, the M is a positive integer smaller than or equal to the M, a pressure signal output end of the pressure sensor is connected with a pressure signal input end of the controller, a flow regulating end of the controller is connected with a regulating input end of the pressure valve, and a data transceiving end of the wireless transceiving module is connected with a data transceiving end of the controller;
the controller receives the pressure monitoring value sent by the cloud server through the wireless receiving and sending module to serve as a pressure preset threshold value; the pressure preset threshold comprises a pressure preset first threshold and a pressure preset second threshold, and the pressure preset second threshold is greater than the pressure preset first threshold;
when the pressure value that its pressure sensor monitored is less than or equal to pressure and predetermines first threshold value, perhaps the pressure value that pressure sensor monitored is greater than or equal to pressure and predetermines the second threshold value, then the controller sends the pressure value that pressure sensor monitored to the high in the clouds server through wireless transceiver module, and after the high in the clouds server received this pressure value, the high in the clouds server judged the relation between received pressure value and the pressure monitoring value that sends to pressure regulating valve:
if the pressure value received by the cloud server is smaller than or equal to the first pressure monitoring value sent to the pressure regulating valve, the cloud server sends a regulating signal to the pipe network master control valve to increase the pressure value of the pipe network;
and if the pressure value received by the cloud server is greater than or equal to the second pressure monitoring value sent to the pressure regulating valve, the cloud server sends a regulating signal to the pipe network master control valve, so that the pressure value of the pipe network is reduced.
When the pressure value monitored by the pressure sensor is greater than a preset pressure first threshold value and less than a preset pressure second threshold value, the controller sends an opening degree adjusting command to the pressure valve.
In a preferred embodiment of the invention, the mth pressure regulating valve further comprises a temperature sensor, and a temperature signal output end of the temperature sensor is connected with a temperature signal input end of the controller.
In a preferred embodiment of the present invention, as shown in fig. 2, the pressure sensor includes: a first terminal of the resistor R15 is connected to a base of a transistor Q3, an emitter of the transistor Q3 is connected to a power ground, a collector of the transistor Q3 is connected to a first terminal of a resistor R13 and a first terminal of a resistor R14, a second terminal of the resistor R14 is connected to a +12V power supply voltage and a drain of the fet Q1, a second terminal of the resistor R13 is connected to a gate of the fet Q1, a source of the fet Q1 is connected to a first terminal of a resistor R6 and a cathode of a diode D1, a second terminal of the resistor R6 is connected to an emitter of the transistor Q2 and an inverting input terminal of the amplifier U1A, a collector of the transistor Q2 is connected to a power input terminal of the pressure detecting element U2, a base of the transistor Q2 is connected to a first terminal of the resistor R5, a second terminal of the resistor R6 is connected to a positive terminal of the amplifier U1A, an input terminal of the amplifier U1A is connected to a positive terminal of the diode D1 and a first terminal of the resistor R16, a second end of the resistor R16 is connected to a cathode of the diode D2 and an anode of the diode D3, an anode of the diode D2 is connected to the power ground, a cathode of the diode D3 is connected to a first end of the resistor R1 and a first end of the resistor R2, a second end of the resistor R1 is connected to the power ground, a second end of the resistor R2 is connected to a first end of the adjustable resistor R4 and an inverting input of the amplifier U1B, a second end of the adjustable resistor R4 is connected to an output of the amplifier U1B and a non-inverting input of the amplifier U1D, a non-inverting input of the amplifier U1B is connected to a first end of the resistor R3, and a second end of the resistor R3 is connected to the power ground; the power ground terminal of the pressure detecting element U2 is connected with the power ground, the first signal output terminal of the pressure detecting element U2 is connected with the first terminal of the resistor R7, the second signal output terminal of the pressure detecting element U2 is connected with the first terminal of the resistor R8, the second terminal of the resistor R7 is respectively connected with the inverting input terminal of the amplifier U1C and the first terminal of the resistor R10, the second terminal of the resistor R8 is respectively connected with the non-inverting input terminal of the amplifier U1C and the first terminal of the resistor R9, the second terminal of the resistor R9 is connected with the power ground, the second terminal of the resistor R10 is respectively connected with the output terminal of the amplifier U1C and the first terminal of the resistor R11, the second terminal of the resistor R11 is respectively connected with the first terminal of the adjustable resistor R12 and the inverting input terminal of the amplifier U1D, the second end of the adjustable resistor R12 and the output end of the amplifier U1D are respectively connected with the pressure signal input end of the controller, and the second end of the resistor R15 is connected with the pressure working output end of the controller. In this embodiment, the resistance of the resistor R1 is 20K, the resistance of the resistor R2 is 25K, the resistance of the resistor R3 is 1.8K, the resistance of the adjustable resistor R4 is 5K, the resistance of the resistor R5 is 1K, the resistance of the resistor R6 is 810 Ω, the resistances of the resistors R7 and R8 is 3K, the resistances of the resistors R9 and R10 is 30K, the resistance of the resistor R11 is 2K, the resistance of the adjustable resistor R12 is 20K, the resistance of the resistor R13 is 1K, the resistance of the resistor R14 is 5K, the resistance of the resistor R15 is 1.5K, the resistance of the resistor R8 is 10K, the diode D1 and the diode D2 are zener diodes, the diode D1 is 1N4106, the diode D2 is 1N4625, the diode D3 is a switching diode, the model l2 is 355Q 867, the PNP transistor is an NPN transistor A, and the triode A is a field effect transistor The amplifier U1B, the amplifier U1C and the amplifier U1D adopt a four-operation amplifier, and the model thereof can adopt LM 324.
In a preferred embodiment of the present invention, as shown in fig. 3 and 4, the wireless transceiver module includes: a power supply end VBAT1 of the wireless transceiving chip U9 is respectively connected with a first end of a capacitor C45, a first end of a resistor R144, a first end of a capacitor C65, a first end of a capacitor C66 and a voltage OUTPUT end OUTPUT of the voltage conversion chip U11, a second end of a capacitor C45, a second end of a capacitor C65 and a second end of a capacitor C66 are respectively connected with a power ground, a second end of the resistor R144 is connected with an anode of a power indicator LED3, and a cathode of the power indicator LED3 is connected with the power ground; a power supply voltage INPUT end INPUT of the voltage conversion chip U11 is respectively connected with a first end of a capacitor C64, a first end of a capacitor C65 and a voltage end VDD, and a second end of a capacitor C64, a second end of a capacitor C65 and a grounding end of the voltage conversion chip U11 are respectively connected with a power supply ground; a transmitting and receiving signal terminal RFI _ LF of the wireless transmitting and receiving chip U9 is respectively connected to a first terminal of an inductor L10 and a first terminal of an inductor L11, a second terminal of the inductor L11 is connected to a power ground, a second terminal of the inductor L10 is respectively connected to a first terminal of a capacitor C40 and a first terminal of a capacitor C42, a second terminal of the capacitor C42 is connected to the power ground, a second terminal of the capacitor C40 is connected to a first terminal of a capacitor C41, and a second terminal of the capacitor C41 is connected to a signal terminal RF1 of the transmitting and receiving switch U7; a transmitting and receiving signal end RFO _ LF of the wireless transmitting and receiving chip U9 is connected with a first end of an inductor L13, a second end of the inductor L13 is respectively connected with a first end of the inductor L17, a first end of the inductor L18, a first end of a capacitor C51 and a first end of a capacitor C55, a second end of the capacitor C55 is connected with a power ground, a second end of the capacitor C51 is connected with a first end of an inductor L14, a second end of the inductor L14 is respectively connected with a first end of a capacitor C50, a first end of a capacitor C52 is connected with a first end of an inductor L15, a second end of a capacitor C52 is connected with a power ground, a second end of a capacitor C50 and a second end of an inductor L15 are respectively connected with a first end of a capacitor C49, a first end of a capacitor C53 and a first end of an inductor L16, a second end of the capacitor C53 is connected with the power ground, a second end of a capacitor C49 and a second end of an inductor L16 are respectively connected with a first end of a capacitor C54 and a signal end RF2 of the transceiving switch U7, and a second end of a capacitor C54 is connected with the power ground; a second end of the inductor L18 is respectively connected with a first end of the capacitor C57, a first end of the capacitor C58, a first end of the capacitor C59 and a voltage-stabilizing power supply end VR _ PA of the wireless transceiver chip U9, and a second end of the capacitor C57, a second end of the capacitor C58 and a second end of the capacitor C59 are respectively connected with a power ground; a power supply voltage end VDD of the transceiving switch U7 is connected to a first end and a voltage end VDD of a capacitor C39, a second end of a capacitor C39 is connected to a power ground, a signal transceiving end RFC of the transceiving switch U7 is connected to a first end of a capacitor C46, a second end of a capacitor C46 is connected to a first end of a capacitor C47 and a first end of an inductor L12, a second end of a capacitor C47 is connected to a power ground, a second end of an inductor L12 is connected to a first end of a capacitor C48 and an antenna pad SMA, a second end of a capacitor C48 is connected to the power ground, a control end CTRL of the transceiving switch U7 is connected to a first end of a resistor R9 and a first end of a capacitor C56, a second end of a capacitor C56 is connected to the power ground, and a second end of a resistor R9 is connected to a transceiving control end PB5 of the controller; a power voltage end VBAT2 of the wireless transceiving chip U9 is respectively connected with a first end of the capacitor C60, a first end of the capacitor C61 and a voltage end VDD _ RFS, and a ground end GND of the wireless transceiving chip U9 is respectively connected with a second end of the capacitor C60 and a second end of the capacitor C61 and a power ground; the transmitting and receiving end RFO _ HF of the wireless transmitting and receiving chip U9 and the transmitting and receiving end RFI _ LF of the wireless transmitting and receiving chip U9 are respectively connected with the power ground; a power voltage end VBAT3 of the wireless transceiving chip U9 is respectively connected with a first end of a capacitor C62 and a voltage end VDD _ RFS, and a second end of a capacitor C62 is connected with a power ground; a digital power supply voltage end VR _ DIG of the wireless transceiving chip U9 is connected with a first end of a capacitor C44, and a second end of a capacitor C44 is connected with a power ground; an analog power supply voltage end VR _ ANA of the wireless transceiving chip U9 is connected with a first end of a capacitor C43, and a second end of the capacitor C43 is connected with a power ground; the clock terminal SCK of the wireless transceiving chip U9 is connected with the clock terminal PB13 of the controller, the serial data output terminal MISO of the wireless transceiving chip U9 is connected with the serial data input terminal PB14 of the controller, the serial data input terminal MOSI of the wireless transceiving chip U9 is connected with the serial data output terminal PB15 of the controller, the mode selection input terminal NSS of the wireless transceiving chip U9 is connected with the mode selection output terminal PB12 of the controller, the transceiving control input terminal RXTX/RFMOD of the wireless transceiving chip U9 is connected with the transceiving control output terminal PA7 of the controller, and the reset trigger input terminal NRESET of the wireless transceiving chip U9 is connected with the reset trigger output terminal PA6 of the controller. IN this embodiment, a first terminal of the resistor R155 is connected to the voltage terminal VDD _ RFS, a second terminal of the resistor R155 is connected to the positive terminal of the operation indicator LED4, a negative terminal of the operation indicator LED4 is connected to the operation indication output terminal PA8/T1C1/MCO of the controller, a crystal oscillator terminal OSC _ IN of the controller is connected to the first terminal of the crystal oscillator XTAL2 and the first terminal of the capacitor C71, a crystal oscillator terminal OSC _ OUT of the controller is connected to the second terminal of the crystal oscillator XTAL2 and the first terminal of the capacitor C72, the second terminal of the capacitor C71 and the second terminal of the capacitor C72 are connected to the power ground, a reset terminal NRST of the controller is connected to the first terminal of the resistor R166, the first terminal of the capacitor C70 and the first terminal of the reset switch S2, the second terminal of the capacitor C70 and the second terminal of the reset switch S2 are connected to the power ground, and the second terminal of the resistor R166 is connected to the voltage terminal RFS _ VDD. The capacitance values of the capacitor C37 and the capacitor C38 are 12pF, the crystal oscillator Xtal is a 32MHz crystal oscillator, the capacitance values of the capacitor C43, the capacitor C44, the capacitor C45, the capacitor C60, the capacitor C61, the capacitor C62 and the capacitor C64 are 100nF, the capacitance values of the capacitor C63 and the capacitor C65 are 100uF, the model of the voltage conversion chip U11 is ASM1117, the resistances of the resistor R144 and the resistor R155 are 1K, the capacitance values of the capacitor C71 and the capacitor C72 are 18pF, the resistances of the resistor R111 and the resistor R100 are 10K, the resistance of the resistor R166 is 4.7K, the capacitance value of the capacitor C70 is 0.1uF, the controller adopts an STM32F series single chip microcomputer, specifically, the STM32f103C8t6 is adopted, the wireless transceiving chip U9 adopts an NB-IOT series chip, specifically, the transceiving chip can adopt an sx 8, the U7 can adopt a single-pole RF switch 4259.
The invention also discloses a working method for regulating and controlling the pressure of the intelligent pipe network for coal mine gas extraction, which comprises the following steps:
s1, the cloud server is communicated with the mth pressure regulating valve;
s2, the cloud server sends pressure monitoring values to the mth pressure regulating valve, the pressure monitoring values comprise a first pressure monitoring value and a second pressure monitoring value, the second pressure monitoring value is larger than the first pressure monitoring value, the controller receives the pressure monitoring values sent by the cloud server through the wireless receiving and sending module, and the received pressure monitoring values are updated to be current pressure monitoring values; recording the updating time;
s3, the controller collects the pressure value collected by the pressure sensor, and compares the collected pressure value with the current pressure monitoring value:
if the collected pressure value is smaller than or equal to the first pressure monitoring value or the collected pressure value is larger than or equal to the second pressure monitoring value, the controller sends the pressure value collected by the pressure sensor to the cloud server through the wireless receiving and sending module;
if the collected pressure value is smaller than or equal to the first pressure monitoring value or the collected pressure value is larger than or equal to the second pressure monitoring value, the controller sends the pressure value collected by the pressure sensor to the cloud server through the wireless receiving and sending module;
if the collected pressure value is greater than the first pressure monitoring value and less than the second pressure monitoring value, the collected pressure value is not sent to the cloud server;
s4, after the cloud server receives the pressure value collected by the pressure sensor sent by the controller through the wireless transceiving module, the cloud server judges the relation between the received pressure value and the pressure monitoring value sent to the mth pressure regulating valve:
if the pressure value received by the cloud server is smaller than or equal to the first pressure monitoring value sent to the pressure regulating valve, the cloud server sends a regulating signal to the pipe network master control valve to increase the pressure value of the pipe network;
if the pressure value received by the cloud server is larger than or equal to the second pressure monitoring value sent to the pressure regulating valve, the cloud server sends a regulating signal to the pipe network master control valve to reduce the pipe network pressure value;
when the pressure value monitored by the pressure sensor is greater than a preset pressure first threshold value and less than a preset pressure second threshold value, the controller sends an opening degree adjusting command to the pressure valve.
In a preferred embodiment of the present invention, in step S2, the sending, by the cloud server, the pressure monitoring value to the mth pressure regulating valve includes the following steps:
s21, the cloud server encrypts the pressure monitoring value to be sent to obtain a cloud server encrypted value; the method for encrypting the pressure monitoring value to be sent comprises the following steps:
ζ(r)＝HashSHA1(r)，
wherein, HashSHA1() The Hash algorithm of SHA1 is adopted, and r represents a pressure monitoring value to be sent; ζ (r) represents a cloud server cryptographic value;
s22, compressing the cloud server encryption value obtained by the cloud server and the pressure monitoring value to be sent to obtain a pressure monitoring value; and sending the pressure monitoring value to the mth pressure regulating valve. The method for obtaining the pressure monitoring value comprises the following steps:
o＝r&HashSHA1(r)，
wherein r represents a pressure monitoring value to be transmitted;&representing a file connector; hashSHA1(r) the pressure monitoring value r to be sent adopts a Hash algorithm of SHA1 to obtain a cloud server encryption value;
Oo＝TCOMP(o)，
wherein o represents data in a folder; t isCOMP() The compression mode adopting one format of ZIP, RAR and 7Z is shown; o isoIndicating the pressure monitoring value. By enhancing the security of the data through encryption, the compressed data serves to reduce the amount of data received by the pressure regulating valve.
In a preferred embodiment of the present invention, in step S2, the controller receives the pressure monitoring value sent by the cloud server through the wireless transceiver module, and the step of monitoring the received pressure includes the following steps:
s211, decompressing the pressure monitoring value:
if the compressing mode of the ZIP format is adopted in the step S22, adopting a decompressing mode consistent with the ZIP format in the step S22 for the pressure monitoring value;
if the compression mode of the RAR format is adopted in step S22, a decompression mode consistent with the RAR format in step S22 is adopted for the pressure monitoring value;
if the compression mode of the 7Z format is adopted in the step S22, adopting a decompression mode consistent with the 7Z format in the step S22 for the pressure monitoring value;
s212, extracting the decompressed first data information and the decompressed second data information, and performing an encryption operation on the extracted decompressed first data information, where the method of performing the encryption operation on the extracted decompressed first data information is as follows:
ζ′(r′)＝HashSHA1(r′)，
wherein, HashSHA1() The hash algorithm of SHA1 is adopted, and r' represents first data information; ζ '(r') represents data after the first data information is subjected to the encryption operation;
s213, whether data ζ '(r') after the first data information is subjected to the encryption operation matches the second data information:
if zeta '(r') of the data after the first data information is subjected to the encryption operation is inconsistent with the second data information, the data is obtained from the cloud server again;
and if zeta '(r') of the data after the encryption operation of the first data information is consistent with the second data information, writing and updating the pressure first monitoring value and the pressure second monitoring value in the first data information into the memory.
In a preferred embodiment of the present invention, in step S3, the sending, by the controller, the pressure value collected by the pressure sensor to the cloud server through the wireless transceiver module includes the following steps:
s31, encrypting the acquired pressure value to be sent by the controller to obtain a controller encrypted value; the method for encrypting the collected pressure value to be sent comprises the following steps:
ζ(g)′＝HashSHA1(g)，
wherein, HashSHA1() The Hash algorithm of SHA1 is adopted, and g represents the pressure value of the collection to be sent; ζ (g)' represents the controller cryptographic value;
s32, compressing the obtained controller encryption value and the pressure value to be sent and collected to obtain a pressure value; and sending the pressure value to a cloud server. The pressure value obtaining method comprises the following steps:
o′＝g&HashSHA1(g)，
wherein g represents a collected pressure value to be sent;&representing a file connector; hashSHA1(g) The controller encryption value is obtained by adopting a Hash algorithm of SHA1 to represent the collected pressure value g to be sent;
Oo′＝TCOMP(o′)，
wherein o' represents the final data in the folder; t isCOMP() The compression mode adopting one format of ZIP, RAR and 7Z is shown; o iso' denotes the pressure value.
In a preferred embodiment of the present invention, in step S4, the cloud server includes the following steps for the received pressure value:
s211, performing decompression operation on the pressure value:
if the compressing mode of the ZIP format is adopted in the step S32, adopting a decompressing mode consistent with the ZIP format in the step S32 for the pressure monitoring value;
if the compression mode of the RAR format is adopted in step S32, a decompression mode consistent with the RAR format in step S32 is adopted for the pressure monitoring value;
if the compression mode of the 7Z format is adopted in the step S32, adopting a decompression mode consistent with the 7Z format in the step S32 for the pressure monitoring value;
s212, extracting the decompressed first decompressed data information and the decompressed second decompressed data information, and performing an encryption operation on the extracted decompressed first decompressed data information, where the method of performing an encryption operation on the extracted decompressed first decompressed data information includes:
ζ(g′)′＝HashSHA1(g′)，
wherein, HashSHA1() Indicating that the hash algorithm of SHA1 is adopted, g' indicates the first decompressed data information; ζ (g ')' represents data after the first decompressed data information is subjected to an encryption operation;
s213, whether the data ζ (g ')' of the first decompressed data information after the encryption operation is consistent with the second decompressed data information:
if the data zeta (g ') after the encryption operation of the first decompressed data information is consistent with the second decompressed data information, the data zeta (g') is obtained from the mth pressure regulating valve again;
and if the data zeta (g') after the encryption operation is carried out on the first decompressed data information is consistent with the second decompressed data information, updating the collected pressure value in the first decompressed data information to the cloud server.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (4)
1. A coal mine gas extraction intelligent pipe network pressure regulation and control system is characterized by comprising M pressure regulating valves arranged on a pipe network, namely a1 st pressure regulating valve, a 2 nd pressure regulating valve, a 3 rd pressure regulating valve, … … and an Mth pressure regulating valve, wherein M is a positive integer greater than or equal to 1, the Mth pressure regulating valve comprises a pressure sensor, a pressure valve, a controller and a wireless transceiving module, M is a positive integer less than or equal to M, the pressure signal output end of the pressure sensor is connected with the pressure signal input end of the controller, the flow regulating end of the controller is connected with the regulating input end of the pressure valve, and the data transceiving end of the wireless transceiving module is connected with the data transceiving end of the controller;
the controller receives the pressure monitoring value sent by the cloud server through the wireless receiving and sending module to serve as a pressure preset threshold value; the pressure preset threshold comprises a pressure preset first threshold and a pressure preset second threshold, and the pressure preset second threshold is greater than the pressure preset first threshold;
when the pressure value that its pressure sensor monitored is less than or equal to pressure and predetermines first threshold value, perhaps the pressure value that pressure sensor monitored is greater than or equal to pressure and predetermines the second threshold value, then the controller sends the pressure value that pressure sensor monitored to the high in the clouds server through wireless transceiver module, and after the high in the clouds server received this pressure value, the high in the clouds server judged the relation between received pressure value and the pressure monitoring value that sends to pressure regulating valve:
if the pressure value received by the cloud server is smaller than or equal to the first pressure monitoring value sent to the pressure regulating valve, the cloud server sends a regulating signal to the pipe network master control valve to increase the pressure value of the pipe network;
if the pressure value received by the cloud server is larger than or equal to the second pressure monitoring value sent to the pressure regulating valve, the cloud server sends a regulating signal to the pipe network master control valve to reduce the pipe network pressure value;
when the pressure value monitored by the pressure sensor is greater than a preset pressure first threshold value and less than a preset pressure second threshold value, the controller sends an opening degree adjusting command to the pressure valve.
2. The intelligent pipe network pressure regulating and controlling system for coal mine gas extraction according to claim 1, wherein the mth pressure regulating valve further comprises a temperature sensor, and a temperature signal output end of the temperature sensor is connected with a temperature signal input end of the controller.
3. The intelligent pipe network pressure regulating and controlling system for coal mine gas extraction according to claim 1, wherein the pressure sensor comprises: a first terminal of the resistor R15 is connected to a base of a transistor Q3, an emitter of the transistor Q3 is connected to a power ground, a collector of the transistor Q3 is connected to a first terminal of a resistor R13 and a first terminal of a resistor R14, a second terminal of the resistor R14 is connected to a +12V power supply voltage and a drain of the fet Q1, a second terminal of the resistor R13 is connected to a gate of the fet Q1, a source of the fet Q1 is connected to a first terminal of a resistor R6 and a cathode of a diode D1, a second terminal of the resistor R6 is connected to an emitter of the transistor Q2 and an inverting input terminal of the amplifier U1A, a collector of the transistor Q2 is connected to a power input terminal of the pressure detecting element U2, a base of the transistor Q2 is connected to a first terminal of the resistor R5, a second terminal of the resistor R6 is connected to a positive terminal of the amplifier U1A, an input terminal of the amplifier U1A is connected to a positive terminal of the diode D1 and a first terminal of the resistor R16, a second end of the resistor R16 is connected to a cathode of the diode D2 and an anode of the diode D3, an anode of the diode D2 is connected to the power ground, a cathode of the diode D3 is connected to a first end of the resistor R1 and a first end of the resistor R2, a second end of the resistor R1 is connected to the power ground, a second end of the resistor R2 is connected to a first end of the adjustable resistor R4 and an inverting input of the amplifier U1B, a second end of the adjustable resistor R4 is connected to an output of the amplifier U1B and a non-inverting input of the amplifier U1D, a non-inverting input of the amplifier U1B is connected to a first end of the resistor R3, and a second end of the resistor R3 is connected to the power ground; the power ground terminal of the pressure detecting element U2 is connected with the power ground, the first signal output terminal of the pressure detecting element U2 is connected with the first terminal of the resistor R7, the second signal output terminal of the pressure detecting element U2 is connected with the first terminal of the resistor R8, the second terminal of the resistor R7 is respectively connected with the inverting input terminal of the amplifier U1C and the first terminal of the resistor R10, the second terminal of the resistor R8 is respectively connected with the non-inverting input terminal of the amplifier U1C and the first terminal of the resistor R9, the second terminal of the resistor R9 is connected with the power ground, the second terminal of the resistor R10 is respectively connected with the output terminal of the amplifier U1C and the first terminal of the resistor R11, the second terminal of the resistor R11 is respectively connected with the first terminal of the adjustable resistor R12 and the inverting input terminal of the amplifier U1D, the second end of the adjustable resistor R12 and the output end of the amplifier U1D are respectively connected with the pressure signal input end of the controller, and the second end of the resistor R15 is connected with the pressure working output end of the controller.
4. The intelligent pipe network pressure regulating and controlling system for coal mine gas extraction according to claim 1, wherein the wireless transceiver module comprises: a power supply end VBAT1 of the wireless transceiving chip U9 is respectively connected with a first end of a capacitor C45, a first end of a resistor R144, a first end of a capacitor C65, a first end of a capacitor C66 and a voltage OUTPUT end OUTPUT of the voltage conversion chip U11, a second end of a capacitor C45, a second end of a capacitor C65 and a second end of a capacitor C66 are respectively connected with a power ground, a second end of the resistor R144 is connected with an anode of a power indicator LED3, and a cathode of the power indicator LED3 is connected with the power ground; a power supply voltage INPUT end INPUT of the voltage conversion chip U11 is respectively connected with a first end of a capacitor C64, a first end of a capacitor C65 and a voltage end VDD, and a second end of a capacitor C64, a second end of a capacitor C65 and a grounding end of the voltage conversion chip U11 are respectively connected with a power supply ground; a transmitting and receiving signal terminal RFI _ LF of the wireless transmitting and receiving chip U9 is respectively connected to a first terminal of an inductor L10 and a first terminal of an inductor L11, a second terminal of the inductor L11 is connected to a power ground, a second terminal of the inductor L10 is respectively connected to a first terminal of a capacitor C40 and a first terminal of a capacitor C42, a second terminal of the capacitor C42 is connected to the power ground, a second terminal of the capacitor C40 is connected to a first terminal of a capacitor C41, and a second terminal of the capacitor C41 is connected to a signal terminal RF1 of the transmitting and receiving switch U7; a transmitting and receiving signal end RFO _ LF of the wireless transmitting and receiving chip U9 is connected with a first end of an inductor L13, a second end of the inductor L13 is respectively connected with a first end of the inductor L17, a first end of the inductor L18, a first end of a capacitor C51 and a first end of a capacitor C55, a second end of the capacitor C55 is connected with a power ground, a second end of the capacitor C51 is connected with a first end of an inductor L14, a second end of the inductor L14 is respectively connected with a first end of a capacitor C50, a first end of a capacitor C52 is connected with a first end of an inductor L15, a second end of a capacitor C52 is connected with a power ground, a second end of a capacitor C50 and a second end of an inductor L15 are respectively connected with a first end of a capacitor C49, a first end of a capacitor C53 and a first end of an inductor L16, a second end of the capacitor C53 is connected with the power ground, a second end of a capacitor C49 and a second end of an inductor L16 are respectively connected with a first end of a capacitor C54 and a signal end RF2 of the transceiving switch U7, and a second end of a capacitor C54 is connected with the power ground; a second end of the inductor L18 is respectively connected with a first end of the capacitor C57, a first end of the capacitor C58, a first end of the capacitor C59 and a voltage-stabilizing power supply end VR _ PA of the wireless transceiver chip U9, and a second end of the capacitor C57, a second end of the capacitor C58 and a second end of the capacitor C59 are respectively connected with a power ground; a power supply voltage end VDD of the transceiving switch U7 is connected to a first end and a voltage end VDD of a capacitor C39, a second end of a capacitor C39 is connected to a power ground, a signal transceiving end RFC of the transceiving switch U7 is connected to a first end of a capacitor C46, a second end of a capacitor C46 is connected to a first end of a capacitor C47 and a first end of an inductor L12, a second end of a capacitor C47 is connected to a power ground, a second end of an inductor L12 is connected to a first end of a capacitor C48 and an antenna pad SMA, a second end of a capacitor C48 is connected to the power ground, a control end CTRL of the transceiving switch U7 is connected to a first end of a resistor R9 and a first end of a capacitor C56, a second end of a capacitor C56 is connected to the power ground, and a second end of a resistor R9 is connected to a transceiving control end PB5 of the controller; a power voltage end VBAT2 of the wireless transceiving chip U9 is respectively connected with a first end of the capacitor C60, a first end of the capacitor C61 and a voltage end VDD _ RFS, and a ground end GND of the wireless transceiving chip U9 is respectively connected with a second end of the capacitor C60 and a second end of the capacitor C61 and a power ground; the transmitting and receiving end RFO _ HF of the wireless transmitting and receiving chip U9 and the transmitting and receiving end RFI _ LF of the wireless transmitting and receiving chip U9 are respectively connected with the power ground; a power voltage end VBAT3 of the wireless transceiving chip U9 is respectively connected with a first end of a capacitor C62 and a voltage end VDD _ RFS, and a second end of a capacitor C62 is connected with a power ground; a digital power supply voltage end VR _ DIG of the wireless transceiving chip U9 is connected with a first end of a capacitor C44, and a second end of a capacitor C44 is connected with a power ground; an analog power supply voltage end VR _ ANA of the wireless transceiving chip U9 is connected with a first end of a capacitor C43, and a second end of the capacitor C43 is connected with a power ground; the clock terminal SCK of the wireless transceiving chip U9 is connected with the clock terminal PB13 of the controller, the serial data output terminal MISO of the wireless transceiving chip U9 is connected with the serial data input terminal PB14 of the controller, the serial data input terminal MOSI of the wireless transceiving chip U9 is connected with the serial data output terminal PB15 of the controller, the mode selection input terminal NSS of the wireless transceiving chip U9 is connected with the mode selection output terminal PB12 of the controller, the transceiving control input terminal RXTX/RFMOD of the wireless transceiving chip U9 is connected with the transceiving control output terminal PA7 of the controller, and the reset trigger input terminal NRESET of the wireless transceiving chip U9 is connected with the reset trigger output terminal PA6 of the controller.
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