CN107013208A - A kind of NEXT series of products MSP430 telecommunication systems - Google Patents
A kind of NEXT series of products MSP430 telecommunication systems Download PDFInfo
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- CN107013208A CN107013208A CN201610055131.9A CN201610055131A CN107013208A CN 107013208 A CN107013208 A CN 107013208A CN 201610055131 A CN201610055131 A CN 201610055131A CN 107013208 A CN107013208 A CN 107013208A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
Abstract
The invention discloses a kind of NEXT series of products MSP430 telecommunication systems, the system is made up of pressure pulse communication system, underwater sound signal communication system, host computer, down-hole power, wherein pressure pulse communication system and underwater sound signal communication system is bi-directionally connected by underground bus, the former is made up of pressure signal emission system and pressure signal reception system, and the latter is made up of underwater sound signal emission system and underwater sound signal reception system；Pressure signal emission system is made up of compression pump and pressure receiver board respectively with pressure signal reception system, between connected by oil pipe；Underwater sound signal emission system is by underwater sound signal digiboard, digital analog converter, power amplifier and underwater acoustic transducer composition, underwater sound signal reception system is by receive transducer, analog board, underwater sound signal digiboard composition, is connected between underwater sound signal emission system and underwater sound signal reception system by oil pipe.
Description
Technical field
The invention belongs to the concrete application that underground radio communication technology believes field, more particularly to a kind of NEXT series of products MSP430 telecommunication systems.
Background technology
For country, clothing, food, lodging and transportion -- basic necessities of life, industrial development, agricultural development, national defense construction, the economic adjustment of resident, none all be unable to do without oil.It is the prosperous important capital of a national prosperity to obtain abundant oil, however, oil is a kind of huge non-renewable resources of demand, how under existing oil well resources supplIes, improve oil recovery efficiency, obtain more petroleum resources, be the important subject that national energy is built.
Underground communica tion is the important technology of oil field fields of measurement.Underground communica tion technology can upload to oily downhole temperature, pressure, flow parameter on well in real time, while the control information on ground can also be sent into underground.Using underground communication system, oilfielder can grasp the operating mode of underground in real time, formulate rational oil recovery scheme to improve the production efficiency in oil field；Oilfield intelligent construction can be conducive to ground remote control underground equipment.As national oil is largely exploited, the depth of oil well is also constantly increasing, and remote underground communica tion technology is in the urgent need to development.Remote underground communica tion technology contributes to exploration and development petroleum resources, and verified oil oil tests oil well production status.Remote underground communica tion is studied to be favorably improved oil extraction in oil field efficiency and accelerate oilfield intelligent construction.
Since early 20th century, oilfielder pursuing always it is a kind of reliable, stably, efficient underground communica tion means.But, working environment and the interference of other uncertain factors due to underground HTHP, the development of underground communica tion technology are extremely slow, in the past few decades, with being showing improvement or progress day by day and development that sensor technology is advanced by leaps and bounds for the communication technology, underground communica tion field obtains new vitality.The communication mode of underground communica tion includes wire communication, mud-pressure pulses communication, electromagnetic communication, acoustic communication.Daqing oil field in 2002 has carried out the experiment of deep-well sonic transmissions, but is not successfully received information.2007, San Diego, USA laboratory optimized acoustic communication mode, improved traffic rate, but use condition is extremely limited, was only capable of applying in air drilling and underbalance well.
Underground communication system is divided into ground circuit and electric circuit in well two parts, and the power supply of ground circuit can directly use the power supply on ground；The power supply of electric circuit in well can only use the method for supplying power to of battery.Underground narrow space, battery volume is very limited, therefore battery electric quantity is also fewer.In actual oil extraction operation, equipment is transferred to underground depths by well head, such as without special circumstances, will be worked always to supplying cell energy expenditure totally.In order to avoid since it is desired that the loss changed battery and cause oil well to stop work, electric circuit in well is preferably able to stably work throughout the year.Under conditions of basic communication functions are realized, the power consumption of circuit is only reduced as far as possible, is possible to meet work requirements under real well.Therefore, design of optimizing hardware is needed in design process, the operating power consumption and quiescent dissipation of circuit is reduced, and formulates rational power management scheme, the loss of electricity is further reduced.
Temperature is up to 50 DEG C at well head, and downhole temperature is up to 125 DEG C.The temperature of system has considerable influence to circuit, in order that development equipment can be with normal work, it is necessary in circuit design, device selection high temperature resistant device.Underground space is extremely limited, and the confined space will propose more strict requirements to transmitting, the design of receiving circuit.Such as, the design of underwater sound transmission plan transmitting transducer is just limited by well head diameter, in order to be able to reach due power and performance, can only consider that launching cross-sectional area is constant, increases transducer longitudinal length as far as possible, and this causes transmitting transducer under low frequency may be long.Equally, the design of receiving terminal circuit plate only has component and wiring more close, and design requirement is reached by increasing the number of plies.
China is in the backwardness of the Technical comparing in remote underground communica tion field, and the communication mode that some oil wells are used is still traditional wire transmission mode.Wire transmission mode needs to lay very long cable, and communication system sets up that cost is huge, and plant maintenance is difficult.In addition, the adverse circumstances of underground HTHP, often result in cable damage, cause communication disruption.To meet current oil recovery industry low cost, the demand of stable operation, two kinds of wireless communication technologys of applying pressure pulse of the present invention and the underwater sound design remote underground communication system.The present invention has simple in construction, and cheap, system power dissipation is low, the characteristics of performance is stable.
The content of the invention
In order to further solve the drawbacks of traditional underground communication system is present.It is an object of the invention to provide a kind of NEXT series of products MSP430 telecommunication systems, the invention has simple in construction, and cheap, system power dissipation is low, the characteristics of performance is stable.
In order to realize said system, the present invention is adopted the technical scheme that：
A kind of NEXT series of products MSP430 telecommunication systems, it is characterized in that the system is made up of pressure pulse communication system, underwater sound signal communication system, host computer, down-hole power, wherein pressure pulse communication system and underwater sound signal communication system is bi-directionally connected by underground bus, the former is made up of pressure signal emission system and pressure signal reception system, and the latter is made up of underwater sound signal emission system and underwater sound signal reception system；Pressure pulse communication system uses the communication mode of positive pressure pulse, by the supply pressure for increasing and decreasing compression pump, well cylinder pressure is set to change, compression pump generates pressure pulse signal so as to produce pressure pulse by manually operating increase and decrease pressure, pressure receiver board positioned at underground is received, demodulation pressure pulse signal simultaneously opens and closes other circuit boards according to actual conditions, in underwater sound signal communication system, host computer sends information to underwater sound digiboard, underwater sound digiboard modulates information according to certain rule, modulated signal is converted into analog signal via DAC module, analog signal by power amplifier be amplified after send into underwater acoustic transducer, underwater acoustic transducer is arranged on the inside of oil pipe, and fully contacted with the liquid in oil pipe, underwater acoustic transducer can be sent signal in channel, underwater sound signal in pit shaft is received by receive transducer, it is converted into electric signal, electric signal is after filtering, amplification, finally demodulated in the underwater sound digiboard of underground, so as to obtain the information of ground transmission.
In the MSP430 telecommunication systems, pressure pulse communication system uses the communication mode of positive pressure pulse, by increasing and decreasing the supply pressure of compression pump, well cylinder pressure is set to change, compression pump generates pressure pulse signal so as to produce pressure pulse by manually operating increase and decrease pressure.Underwater sound digiboard modulates information according to certain rule, and modulated signal is converted into analog signal via DAC module, analog signal by power amplifier be amplified after send into underwater acoustic transducer, the underwater sound signal in pit shaft is by receive transducer（Hydrophone）Receive, be converted into electric signal；After filtering, amplification is finally demodulated electric signal in the underwater sound digiboard of underground, so as to obtain the information of ground transmission.
In the MSP430 telecommunication systems, pressure pulse communication system is made up of pressure signal emission system and pressure signal reception system, pressure receiver board including compression pump and underground, pressure pulse communication system uses the communication mode of positive pressure pulse, by increasing and decreasing the supply pressure of compression pump, pressure signal reception system includes pressure sensor, amplifying circuit, wake-up circuit, receives sheet processor and the EBI for communicating, powering；The pressure sensor selects the LTP-J12A type diaphragm pressure transducers of Long Xiangtian power company, range ability 0-100MPa, response time≤1 millisecond, the Ω of output impedance 1500 ± 50；The amplifying circuit chip selection instrument amplifier ad8227, ad8227 are a high temperature resistant, the chip of low-power consumption, gain-adjusted scope 5 ~ 1000, and voltage range is up to 2.2v to 36v, and quiescent current 350uA, bandwidth of operation is 250kHz；The reception sheet processor selects MSP430G2332 cake cores, and electric current 230uA, built-in 10 ADC and multiple support ADC I/O pins, serial interface communication mode includes I2C, UART, SPI；The communication that the pressure receiver board EBI pin is used between pressure receiver board and underwater sound digiboard, the communication of power supply Enable Pin and battery pack connection of underwater sound digiboard, its communication protocol is I2C。
In the MSP430 telecommunication systems, the underwater sound signal emission system includes：Underwater sound signal digiboard, digital analog converter, power amplifier and underwater acoustic transducer；The underwater sound signal digiboard uses TMS320C28346 type high temperature resistant digital signal processing chips, the function of compatible underwater sound signal generator and the circuit board of underwater sound signal demodulation, chip dominant frequency 300MHz, RAM size 256K, possess 2 SPI modules, 3 UART modules, be internally integrated I2C buses, operating temperature is between -40 DEG C to 125 DEG C；The digital analog converter selects AD5453 type digital to analog converters, normal working voltage 2.5V is between 5.5V, with SPI, the interface of MICROWIRE digital signal processing chips, signal frequency is up to 50MHz, and the bandwidth with 10MHz, in order to reduce the output impedance of digital analog converter, needed from the AD5453 analog signals exported after a Voltagre regulator, be re-fed into power amplifier plate；The signal first pass around power amplifier the first order in the same direction/sign-changing amplifier done certain multiple balance amplification, both output amplitudes are equal, the amplified signal of phase difference 180 degree, then signal two-way exported carries out second level amplification again, transducer is finally coupled to launch signal, the chip of first order amplifying circuit uses AD8031, the bandwidth of operation of the chip is wider, half power points is in 80MHz, under the condition of power supply of 5v power supplys, power consumption is no more than 5mW, second level amplifying circuit chip selects MP118, the signal intensity that highest can be exported is up to 100W；70 ~ 80Mpa of the underwater acoustic transducer compressive resistance, frequency 10kHz, receiving sensitivity is more than -180dB, 5m/s grains of sand stream erosions can be resisted, there is possible caused transducer in view of high pressure and eject the unsafe factor that well is caused, the present invention is punched by using transmitting transducer side, the mode that nut is fixed hangs transducer in well head by the feet, energy converter planar is directly contacted with aqueous medium down, electric wire can be directly led out by transducer afterbody, also drawn from being boxed out from side, the additional anti-high voltage protective of protection cap, intermediate cross-section changing unit avoids the collision of sensor and housing caused by sound wave longitudinally shakes using cushion, so as to ensure that signal stabilization is reliable.
In the MSP430 telecommunication systems, the underwater sound signal reception system includes：Receive transducer, analog board, underwater sound signal digiboard；Wherein underwater acoustic transducer, underwater sound signal digiboard are for example foregoing；The analog board is made up of wave filter, ADC, gain-programmed amplifier, and analog board function is nurses one's health the signal of receive transducer and the signal after conditioning is converted into data signal, and last data signal sends into DSP module by simulation plate interface；Wave filter uses multilevel hierarchy, and LPF is done in front end using passive filter, and bandpass filtering is done in rear end using active filter, and the centre frequency of system signal is in 10KHz or so, and the passband of wave filter is between 9k ~ 11K, and stopband is in 25KHz or so decay 40dB；The chip of gain-programmed amplifier selects LMP8358,0 to 1000 times of multiplication factor, single supply is supported to power, quiescent current is 1.8mA, bandwidth of operation 8MHz, after electric signal is via two programmable amplifiers, signal is divided into two-way, sampling in ADC is directly passed to all the way and obtains data signal, waveform peak is obtained by detecting circuit all the way, and DSP can adjust the gain of gain-programmed amplifier according to peak value；ADC chip selects AD7476, maximum sampling rate 1MSPS, and supply voltage is 2.7 ~ 5.25V, power consumption 4.5mW, quiescent current 1uA, supports SPI communication, can carry out high-speed communication with DSP.
The beneficial effects of the invention are as follows：
A kind of NEXT series of products MSP430 telecommunication systems, it is characterized in that, system is made up of pressure pulse communication system, underwater sound signal communication system, host computer, down-hole power, wherein pressure pulse communication system and underwater sound signal communication system is bi-directionally connected by underground bus, the former is made up of pressure signal emission system and pressure signal reception system, and the latter is made up of underwater sound signal emission system and underwater sound signal reception system；In the present invention, pressure pulse communication system uses the communication mode of positive pressure pulse, by the supply pressure for increasing and decreasing compression pump, well cylinder pressure is set to change, compression pump generates pressure pulse signal so as to produce pressure pulse by manually operating increase and decrease pressure, amplifying circuit chip selects instrument amplifier ad8227, receives sheet processor and selects MSP430G2332 cake cores, communication protocol is I2C.Underwater sound signal digiboard uses TMS320C28346 type high temperature resistant digital signal processing chips, and digital analog converter selection AD5453 type digital to analog converters, the chip of first order amplifying circuit uses AD8031, and second level amplifying circuit chip selects MP118；The present invention has simple in construction, cheap, real-time, the characteristics of performance is stable, and system power dissipation is low, the characteristics of performance is stable.
Brief description of the drawings
The present invention is further explained below in conjunction with the drawings and specific embodiments.
Fig. 1 is NEXT series of products MSP430 telecommunication system overall framework figures；
Fig. 2 is pressure receiver board system block diagram；
Fig. 3 is amplifying circuit schematic diagram；
Fig. 4 is MSP430G2332 connection figures；
Fig. 5 is underwater sound signal transmitting block diagram；
Fig. 6 is underwater sound signal digiboard structure chart；
Fig. 7 is power amplifier plate system block diagram；
Fig. 8 is underwater sound signal reception system structured flowchart.
Embodiment
The present invention embodiment be：A kind of described NEXT series of products MSP430 telecommunication systems, pressure pulse communication system uses the communication mode of positive pressure pulse, by the supply pressure for increasing and decreasing compression pump, well cylinder pressure is set to change, compression pump generates pressure pulse signal so as to produce pressure pulse by manually operating increase and decrease pressure, pressure receiver board positioned at underground is received, demodulation pressure pulse signal simultaneously opens and closes other circuit boards according to actual conditions, in underwater sound signal communication system, host computer sends information to underwater sound digiboard, underwater sound digiboard modulates information according to certain rule, modulated signal is converted into analog signal via DAC module, analog signal by power amplifier be amplified after send into underwater acoustic transducer, underwater acoustic transducer is arranged on the inside of oil pipe, and fully contacted with the liquid in oil pipe, underwater acoustic transducer can be sent signal in channel, underwater sound signal in pit shaft is received by receive transducer, it is converted into electric signal, electric signal is after filtering, amplification, finally demodulated in the underwater sound digiboard of underground, so as to obtain the information of ground transmission.
Fig. 1 is NEXT series of products MSP430 telecommunication system overall framework figures, the system is made up of pressure pulse communication system, underwater sound signal communication system, host computer, down-hole power, wherein pressure pulse communication system and underwater sound signal communication system is bi-directionally connected by underground bus, the former is made up of pressure signal emission system and pressure signal reception system, and the latter is made up of underwater sound signal emission system and underwater sound signal reception system；Host computer is bi-directionally connected with underwater sound signal communication system, control and interaction for system；Down-hole power is connected with pressure pulse communication system and underwater sound signal communication system by wire, the power supply for system underground；Pressure signal emission system is made up of compression pump and pressure receiver board respectively with pressure signal reception system, between connected by oil pipe；Underwater sound signal emission system is by underwater sound signal digiboard, digital analog converter, power amplifier and underwater acoustic transducer composition, underwater sound signal reception system is by receive transducer, analog board, underwater sound signal digiboard composition, is connected between underwater sound signal emission system and underwater sound signal reception system by oil pipe.
Fig. 2 is pressure receiver board system block diagram, and pressure receiver board is the core of pressure reception system, and the structure of pressure receiver board includes：Pressure sensor, amplifying circuit, wake-up circuit, MSP430G2332 processors and the EBI for communicating, powering.In the present invention, pressure sensor selects the LTP-J12A type diaphragm pressure transducers of Long Xiangtian power company, range ability 0-100MPa, response time≤1 millisecond, the Ω of output impedance 1500 ± 50；In the present invention, receive sheet processor and select MSP430G2332 cake cores, electric current 230uA, built-in 10 ADC and multiple support ADC I/O pins, serial interface communication mode includes I2C, UART, SPI；In the present invention, the communication that pressure receiver board EBI pin is used between pressure receiver board and underwater sound digiboard, the communication of power supply Enable Pin and battery pack connection of underwater sound digiboard, its communication protocol is I2C。
Fig. 3 is amplifying circuit schematic diagram, in the present invention, the selection of amplifying circuit chip instrument amplifier ad8227, ad8227 are a high temperature resistant, the chip of low-power consumption, gain-adjusted scope 5 ~ 1000, voltage range is up to 2.2v to 36v, and quiescent current 350uA, bandwidth of operation is 250kHz, in figure, 2nd, 3 pin are amplifier in, and 6 pin are that the resistance between amplifier out, 1,8 pin is Rg.
Fig. 4 is MSP430G2332 connection figures, and processor is the core of pressure receiver board, and its function is pressure signal collection, decoding, system wake-up.The module is less demanding to the speed of processing data, ram space, thus processor preferably from ADC, support I2The not high chip of C communications, low-power consumption, small volume, working frequency.MSP430G2332 has following characteristic：In the operating mode, its electric current is only 230uA（1MHz, 2.2v power）；Chip volume is smaller, and package dimension is 6.5mm*6.5mm；It can be worked under -40 degrees Celsius to 150 degrees Celsius of temperature environment；Built-in 10 ADC, multiple support ADC I/O pins；The random access memory of 4Kb flash memory and 256 bytes；Serial interface communication mode includes I2C, UART, SPI；With 16 built-in bit timing devices；The time of consumption is waken up less than 1us from standby mode；With 5 kinds of energy saver modes, 10 adc circuits are provided with inside MSP430G2332, can directly be sampled on piece, reference voltage selects the 1.5V voltages of chip internal.
Fig. 5 is underwater sound signal transmitting block diagram, and the underwater sound signal emission system positioned at ground includes underwater sound signal digiboard（DSP）, digital analog converter（DAC）Power amplifier and underwater acoustic transducer, system parses the signal sent by high performance signal processor DSP, signal is modulated, adds synchronization process to obtain the data signal that will be sent, data signal is being changed into by analog signal by digital analog converter module, pass through power amplifier amplifying power again, analog signal is converted into acoustical signal finally by transmitting transducer and sent.
Fig. 6 is underwater sound signal digiboard structure chart, the function of the circuit board of the compatible underwater sound signal generator of underwater sound signal digiboard and underwater sound signal demodulation.The core of underwater sound signal digiboard is digital signal processing chip, and when carrying DAC-circuit plate, it can be used as underwater sound signal generator；Adc circuit plate is being carried, it can be used as underwater signal demodulator circuit plate.TMS320C28346 is a low-power consumption, resistant to elevated temperatures digital signal processing chip, dominant frequency 300MHz；RAM sizes 256K, 2 SPI modules, 3 UART modules are internally integrated I2C buses；Operating temperature is between -40 DEG C to 125 DEG C.In the present invention external random access memory is used as from Is64wv6416bll, digiboard can be connected by simulating plate interface with analog board DAC, DSP data signal is transferred to DAC module from interface, power conversion chip uses efficient TPS62420 in the present invention, and the present invention is used as memory device from the K9F1G08U0M of Samsung.
Fig. 7 is power amplifier plate system block diagram, and the position of power amplifier in systems is between underwater sound signal generator and transducer, and its function is that the signal that underwater sound signal generator is produced is amplified.The analog signal that power amplifier in the present invention is used to export DAC is amplified, and increases signal propagation distance.First signal by the first order in the same direction/sign-changing amplifier done certain multiple balance amplification, both output amplitudes are equal, the amplified signal of phase difference 180 degree；Then signal two-way exported carries out second level amplification again, is finally coupled to transducer and launches signal.The power supply of second level amplifying circuit needs positive and negative 100 volts of dc source, and first order amplifying circuit needs positive and negative 5v dc source.Therefore, power amplification version needs to design two independent power supply modules.It is transformation, rectification, voltage stabilizing, filtering that AC signal, which is converted into direct current signal process, for protection circuit, will inline fuse in circuit.The chip of first order amplifying circuit uses AD8031, and the bandwidth of operation of the chip is wider, and half power points is in 80MHz, under the condition of power supply of 5v power supplys, power consumption is no more than 5mW, and second level amplifying circuit chip selects MP118, and the signal intensity that highest can be exported is up to 100W
Fig. 8 is underwater sound signal reception system structured flowchart, and underwater sound signal reception system includes：Receive transducer, analog board, underwater sound signal digiboard（DSP）.Wherein analog board is by wave filter, and ADC, gain-programmed amplifier is constituted；Underwater sound signal is converted into electric signal by receive transducer, and module removes the noise of high frequency and low frequency to electric signal after filtering；The signal handled after filtering amplifies in gain-programmed amplifier；ADC modules are sampled to amplified signal, obtain data signal；DSP modules read ADC conversion results, so far, realize the reception of underwater sound signal.The function of analog board is to nurse one's health the signal of receive transducer and the signal after conditioning is converted into data signal, and last data signal sends into DSP modules by simulation plate interface.Wave filter uses multilevel hierarchy, and LPF is done in front end using passive filter, and bandpass filtering is done in rear end using active filter, and the centre frequency of system signal is in 10KHz or so, and the passband of wave filter is between 9k ~ 11K, and stopband is in 25KHz or so decay 40dB；The chip of gain-programmed amplifier selects LMP8358,0 to 1000 times of multiplication factor, single supply is supported to power, quiescent current is 1.8mA, bandwidth of operation 8MHz, after electric signal is via two programmable amplifiers, signal is divided into two-way, sampling in ADC is directly passed to all the way and obtains data signal, waveform peak is obtained by detecting circuit all the way, and DSP can adjust the gain of gain-programmed amplifier according to peak value；ADC chip selects AD7476, maximum sampling rate 1MSPS, and supply voltage is 2.7 ~ 5.25V, power consumption 4.5mW, quiescent current 1uA, supports SPI communication, can carry out high-speed communication with DSP.
General technical staff of the technical field of the invention also will readily appreciate that in addition to the foregoing, and the specific embodiment for illustrating herein and illustrating can further change combination.Although the present invention gives diagram with regard to its preferred embodiment and illustrated, person skilled in the art to the present invention, it is recognized that in the spirit and scope of the present invention limited in the attached claims, can also make a variety of changes and variation.
Claims (4)
1. a kind of NEXT series of products MSP430 telecommunication systems, it is characterized in that the system is made up of pressure pulse communication system, underwater sound signal communication system, host computer, down-hole power, wherein pressure pulse communication system is made up of pressure signal emission system and pressure signal reception system, and underwater sound signal communication system is made up of underwater sound signal emission system and underwater sound signal reception system；Pressure pulse communication system uses the communication mode of positive pressure pulse, by the supply pressure for increasing and decreasing compression pump, well cylinder pressure is set to change, compression pump generates pressure pulse signal so as to produce pressure pulse by manually operating increase and decrease pressure, pressure receiver board positioned at underground is received, demodulation pressure pulse signal simultaneously opens and closes other circuit boards according to actual conditions, in underwater sound signal communication system, host computer sends information to underwater sound digiboard, underwater sound digiboard modulates information according to certain rule, modulated signal is converted into analog signal via DAC module, analog signal by power amplifier be amplified after send into underwater acoustic transducer, underwater acoustic transducer is arranged on the inside of oil pipe, and fully contacted with the liquid in oil pipe, underwater acoustic transducer can be sent signal in channel, underwater sound signal in pit shaft is received by receive transducer, it is converted into electric signal, electric signal is after filtering, amplification, finally demodulated in the underwater sound digiboard of underground, so as to obtain the information of ground transmission；Within the system, pressure pulse communication system and underwater sound signal communication system are bi-directionally connected by underground bus, host computer is bi-directionally connected with underwater sound signal communication system, down-hole power is connected with pressure pulse communication system and underwater sound signal communication system by wire, connected, connected between underwater sound signal emission system and underwater sound signal reception system by oil pipe by oil pipe between pressure signal emission system and pressure signal reception system.
2. NEXT series of products MSP430 telecommunication systems as claimed in claim 1, it, which is levied, is, the pressure pulse communication system is made up of pressure signal emission system and pressure signal reception system, pressure receiver board including compression pump and underground, pressure pulse communication system uses the communication mode of positive pressure pulse, by the supply pressure for increasing and decreasing compression pump, pressure signal reception system includes pressure sensor, amplifying circuit, wake-up circuit, receives sheet processor and the EBI for communicating, powering；
Pressure sensor selects the LTP-J12A type diaphragm pressure transducers of Long Xiangtian power company, range ability 0-100MPa, response time≤1 millisecond, the Ω of output impedance 1500 ± 50；
The selection of amplifying circuit chip instrument amplifier ad8227, ad8227 are a high temperature resistant, the chip of low-power consumption, gain-adjusted scope 5 ~ 1000, and voltage range is up to 2.2v to 36v, and quiescent current 350uA, bandwidth of operation is 250kHz；
Receive sheet processor and select MSP430G2332 cake cores, electric current 230uA, built-in 10 ADC and multiple support ADC I/O pins, serial interface communication mode includes I2C, UART, SPI；
The communication that pressure receiver board EBI pin is used between pressure receiver board and underwater sound digiboard, the communication of power supply Enable Pin and battery pack connection of underwater sound digiboard, its communication protocol is I2C。
3. NEXT series of products MSP430 telecommunication systems as claimed in claim 1, it, which is levied, is, the underwater sound signal emission system includes：Underwater sound signal digiboard, digital analog converter, power amplifier and underwater acoustic transducer；
Underwater sound signal digiboard uses TMS320C28346 type high temperature resistant digital signal processing chips, the function of compatible underwater sound signal generator and the circuit board of underwater sound signal demodulation, chip dominant frequency 300MHz, RAM size 256K, possess 2 SPI modules, 3 UART modules, be internally integrated I2C buses, operating temperature is between -40 DEG C to 125 DEG C；
Digital analog converter selects AD5453 type digital to analog converters, normal working voltage 2.5V is between 5.5V, with SPI, the interface of MICROWIRE digital signal processing chips, signal frequency is up to 50MHz, and the bandwidth with 10MHz, in order to reduce the output impedance of digital analog converter, needed from the AD5453 analog signals exported after a Voltagre regulator, be re-fed into power amplifier plate；
Signal first pass around power amplifier the first order in the same direction/sign-changing amplifier done certain multiple balance amplification, both output amplitudes are equal, phase difference 180 degree amplified signal, then signal two-way exported carries out second level amplification again, transducer is finally coupled to launch signal, the chip of first order amplifying circuit uses AD8031, the bandwidth of operation of the chip is wider, half power points is in 80MHz, under the condition of power supply of 5v power supplys, power consumption is no more than 5mW, second level amplifying circuit chip selects MP118, and the signal intensity that highest can be exported is up to 100W；
70 ~ 80Mpa of underwater acoustic transducer compressive resistance, frequency 10kHz, receiving sensitivity is more than -180dB, 5m/s grains of sand stream erosions can be resisted, there is possible caused transducer in view of high pressure and eject the unsafe factor that well is caused, the present invention is punched by using transmitting transducer side, the mode that nut is fixed hangs transducer in well head by the feet, energy converter planar is directly contacted with aqueous medium down, electric wire can be directly led out by transducer afterbody, also drawn from being boxed out from side, the additional anti-high voltage protective of protection cap, intermediate cross-section changing unit avoids the collision of sensor and housing caused by sound wave longitudinally shakes using cushion, so as to ensure that signal stabilization is reliable.
4. NEXT series of products MSP430 telecommunication systems as claimed in claim 1, it, which is levied, is, the underwater sound signal reception system includes：Receive transducer, analog board, underwater sound signal digiboard；Wherein underwater acoustic transducer, underwater sound signal digiboard are as claimed in claim 3；
Analog board is made up of wave filter, ADC, gain-programmed amplifier, and analog board function is nurses one's health the signal of receive transducer and the signal after conditioning is converted into data signal, and last data signal sends into DSP module by simulation plate interface；Wave filter uses multilevel hierarchy, and LPF is done in front end using passive filter, and bandpass filtering is done in rear end using active filter, and the centre frequency of system signal is in 10KHz or so, and the passband of wave filter is between 9k ~ 11K, and stopband is in 25KHz or so decay 40dB；The chip of gain-programmed amplifier selects LMP8358,0 to 1000 times of multiplication factor, single supply is supported to power, quiescent current is 1.8mA, bandwidth of operation 8MHz, after electric signal is via two programmable amplifiers, signal is divided into two-way, sampling in ADC is directly passed to all the way and obtains data signal, waveform peak is obtained by detecting circuit all the way, and DSP can adjust the gain of gain-programmed amplifier according to peak value；ADC chip selects AD7476, maximum sampling rate 1MSPS, and supply voltage is 2.7 ~ 5.25V, power consumption 4.5mW, quiescent current 1uA, supports SPI communication, can carry out high-speed communication with DSP.
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| CN107888297A (en) * | 2017-11-20 | 2018-04-06 | 武汉大学 | The underwater sound communication appearance for possessing dormancy awakening function prolongs appearance circuit network system and method |
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