CN103117717A - Power amplifier and implementing method thereof, transmitter and wireless measurement while drilling system - Google Patents
Power amplifier and implementing method thereof, transmitter and wireless measurement while drilling system Download PDFInfo
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- CN103117717A CN103117717A CN2012105332733A CN201210533273A CN103117717A CN 103117717 A CN103117717 A CN 103117717A CN 2012105332733 A CN2012105332733 A CN 2012105332733A CN 201210533273 A CN201210533273 A CN 201210533273A CN 103117717 A CN103117717 A CN 103117717A
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Abstract
The invention provides a power amplifier and an implementing method thereof, a transmitter and a wireless measurement while drilling system. The implementing method of the power amplifier comprises defecting the voltage amplitude and the current amplitude of an output stage of the power amplifier in real time and calculating output power according to the voltage amplitude and the current amplitude, comparing the output power with standard power, adjusting feedback control voltage of the power amplifier according to a compared result, and adjusting supply voltage of the output stage of the power amplifier according to the feedback control voltage and further controlling the output voltage of the output stage of the power amplifier. The implementing method of the power amplifier solves the problem that a power amplifier can not self-adaptively conduct matching and thus has the advantage of self-adaptive matching.
Description
Technical field
The present invention relates to dynamo-electric field, in particular to a kind of power amplifier and its implementation, transmitter and wireless drilling measuring system.
Background technology
In the development of resources such as oil, mine drilling process, a large amount of information is along with creeping into real-time Transmission to ground, and electromagnetic transmission is a kind of effective transmission means.The underground signal emitter comprises: transmitting antenna (Non-symmetrical dipole) and transmitter.Because the variation of formation resistivity with the degree of depth changes, and the transmitting antenna equiva lent impedance changes with formation resistivity is different, and during at 1 Ω m～1000 Ω m, the antenna equiva lent impedance is approximately 0.1 Ω～50 Ω when formation resistivity.Simultaneously, because the stratum is lossy dielectric, electromagnetic wave is very large in the stratum transmission attenuation, adapts to the wave frequency scope of stratum transmission: 0～30Hz.In drilling process, emitter is installed in down-hole equipment, narrow space, and work under bad environment should be born anti-vibration, shock resistance in drilling process, exports again relatively high power and is beneficial to ground receiving wastewater facility reception signal.Therefore, the design of transmitter power amplifier need to be satisfied the Dynamic Matching with transmitting antenna, can be less in formation resistivity, can realize again effective power output in the higher situation of formation resistivity.
Transmitter power amplifier design in the past is all to adopt transformer to realize impedance matching for the coupling of power amplifier and transmitting antenna.Because the load impedance dynamic range is too large, need many tapped transformers to realize, implement difficult.More because signal frequency is in extremely low frequency, volume of transformer will satisfy frequency characteristic, certainly will want large by volume.Due to the subsurface environment narrow space, adopt the coupling way of transformer to realize.
Therefore, the Adaptive matching power amplifier under the wide dynamic load variations condition of a kind of transless of design is the effective way that solves such problem.
Can't self adaptation carry out the problem of power match for the correlation technique intermediate power amplifier, not yet propose at present effective solution.
Summary of the invention
The invention provides a kind of power amplifier and its implementation, transmitter and wireless drilling measuring system, to address the above problem at least.
According to an aspect of the present invention, provide a kind of implementation method of power amplifier, having comprised: detected in real time voltage amplitude and the current amplitude of described power amplifier output-stage and calculate power output according to described voltage amplitude and current amplitude; More described power output and calibration power, and adjust the FEEDBACK CONTROL voltage of described power amplifier according to comparative result; Adjust the supply power voltage of described power amplifier output-stage according to described FEEDBACK CONTROL voltage, and then control the power output of described power amplifier output-stage.
Preferably, described method also comprises: the pulse signal of input is processed the generation square-wave signal; Adjust the amplitude of described square-wave signal according to described supply power voltage, wherein, the amplitude of described square-wave signal is directly proportional to described supply power voltage; The power output of described power amplifier drives described square-wave signal by the transmission antennas transmit electromagnetic signal.
Preferably, the pulse signal of input is processed generating square-wave signal and comprise: the Transistor-Transistor Logic level pulse signal to the two-way time complementation of input is modulated, and the differential amplification generation of the signal after modulate bipolar square wave signal; The amplification of described power amplifier promotes the square-wave signal after level is amplified modulation, and the square-wave signal after described amplification is loaded into the output stage of described power amplifier.
Preferably, more described power output and calibration power, and according to the FEEDBACK CONTROL voltage that comparative result is adjusted described power amplifier comprise following one of at least: obtain the power output magnitude of voltage according to described power output, more described power output magnitude of voltage and with the corresponding calibration power magnitude of voltage of described calibration power, in the situation that described power output magnitude of voltage is greater than described calibration power magnitude of voltage, reduce FEEDBACK CONTROL voltage, otherwise, FEEDBACK CONTROL voltage improved; More described current amplitude and maximum permission operating current amplitude are in the situation that described current amplitude reduces FEEDBACK CONTROL voltage greater than the described maximum operating current amplitude that allows.
Preferably, described square-wave signal is data modulated signal, and wherein, the modulating mode of described modulation signal is phase-shift keying, differential phase-shift keying (DPSK), frequency shift keying or amplitude keying.
Preferably, described power amplifier is the switching mode amplifier, and its output stage is operated on off state, is output as the bipolar square wave signal, and the amplitude of described square-wave signal is determined by the supply power voltage of the output stage of described power amplifier.
According to a further aspect in the invention, provide a kind of power amplifier, having comprised: detection module is used for detecting in real time voltage amplitude and the current amplitude of described power amplifier output-stage and calculating power output according to described voltage amplitude and current amplitude; Comparison module is used for more described power output and calibration power, and adjusts the FEEDBACK CONTROL voltage of described power amplifier according to comparative result; Adjusting module is used for adjusting according to described FEEDBACK CONTROL voltage the supply power voltage of described power amplifier output-stage, and then controls the power output of described power amplifier.
Preferably, also comprise: amplify the promotion level, be used for the pulse signal of input is processed and generate the bipolar square wave signal, adjust the amplitude of described square-wave signal according to described supply power voltage, wherein, the amplitude of described square-wave signal is directly proportional to described supply power voltage, and utilizes the power output of described power amplifier to drive described square-wave signal by the transmission antennas transmit electromagnetic signal.
Preferably, described amplification promotion level is used for the Transistor-Transistor Logic level pulse signal of the two-way time complementation of input is modulated, and the differential amplification of the signal after modulating produces the bipolar square wave signal, then amplify the square-wave signal after modulating, and the square-wave signal after described amplification is loaded into the output stage of described power amplifier.
Preferably, described comparison module be used for following one of at least: obtain the power output magnitude of voltage according to described power output, more described power output magnitude of voltage and with the corresponding calibration power magnitude of voltage of described calibration power, in the situation that described power output magnitude of voltage is greater than described calibration power magnitude of voltage, reduce FEEDBACK CONTROL voltage, otherwise, improve FEEDBACK CONTROL voltage; More described current amplitude and maximum permission operating current amplitude are in the situation that described current amplitude reduces FEEDBACK CONTROL voltage greater than the described maximum operating current amplitude that allows.
According to a further aspect in the invention, provide a kind of transmitter, comprised the described power amplifier of any one in above-mentioned the 7th to the tenth.
According to a further aspect in the invention, provide a kind of wireless drilling measuring system, having comprised: downhole system is used for gathering and sending downhole data; Aboveground system is used for receiving and processing described downhole data; Wherein, described downhole system comprises above-mentioned the 11 described transmitter, be used for sending described downhole data to described aboveground system, described downhole data comprise following one of at least: inclination angle, orientation, tool-face, temperature, natural gamma, pressure, electromagnetic resistivity.
By the present invention, detect in real time voltage amplitude and the current amplitude of described power amplifier output-stage and calculate power output according to this voltage amplitude and current amplitude; Relatively power output and calibration power, and according to the FEEDBACK CONTROL voltage of comparative result Modulating Power amplifier; According to the supply power voltage of FEEDBACK CONTROL voltage Modulating Power amplifier output stage, and then the power output of power ratio control amplifier output stage, solved the problem that power amplifier can't self adaptation mates, and then reached the effect with Adaptive matching.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the implementation method of the Adaptive matching power amplifier of the embodiment of the present invention;
Fig. 2 is the structured flowchart according to the Adaptive matching power amplifier of the embodiment of the present invention;
Fig. 2 a is the structured flowchart according to the wireless drilling measuring system of the embodiment of the present invention;
Fig. 3 is the structured flowchart of Adaptive matching power amplifier according to the preferred embodiment of the invention;
Fig. 3 a amplifies the circuit diagram that promotes level according to the preferred embodiment of the invention;
Fig. 3 b is the circuit diagram of complementary push-pull output stage according to the preferred embodiment of the invention;
Fig. 3 c is the circuit diagram of power calculation circuit according to the preferred embodiment of the invention.
Embodiment
Hereinafter also describe in conjunction with the embodiments the present invention in detail with reference to accompanying drawing.Need to prove, in the situation that do not conflict, embodiment and the feature in embodiment in the application can make up mutually.
Embodiment one
The embodiment of the present invention provides a kind of implementation method of Adaptive matching power amplifier, and Fig. 1 is the flow chart according to the implementation method of the Adaptive matching power amplifier of the embodiment of the present invention, and as shown in Figure 1, this flow process comprises the following steps:
Step S102, the voltage amplitude of real-time detection power amplifier output stage and current amplitude also calculate power output according to this voltage amplitude and current amplitude;
Step S104, relatively power output and calibration power, and according to the FEEDBACK CONTROL voltage of comparative result Modulating Power amplifier;
Step S106 according to the supply power voltage of this FEEDBACK CONTROL voltage Modulating Power amplifier output stage, and then controls the power output of this power amplifier output-stage.
By above-mentioned steps, the design that has changed transmitter power amplifier in the correlation technique adopts transformer to realize the way of impedance matching, and then has realized realizing the Dynamic Matching of power amplifier and transmitting antenna under wide dynamic load variations condition.
After the power output of controlling described power amplifier output-stage, the method also comprises: the pulse signal of input is processed the generation square-wave signal; Adjust the amplitude of this square wave signal according to supply power voltage, wherein, the amplitude of this square wave signal is directly proportional to supply power voltage; The power output of power amplifier drives this square wave signal by the transmission antennas transmit electromagnetic signal.By above-mentioned steps, ensured that under the Different Strata resistivity conditions, transmitter is exported effective power by antenna, and then ensured that aboveground system can detect signal.
The pulse signal of input is processed the mode that generates square-wave signal to be had a variety of, preferably, the Transistor-Transistor Logic level pulse signal of two-way time complementation to input is modulated, and the differential amplification of the signal after modulating produces the bipolar square wave signal, the amplification of power amplifier promotes the square-wave signal after level is amplified modulation, and the square-wave signal after amplifying is loaded into the output stage of power amplifier.Form the bipolar square wave signal after by above-mentioned steps, the signal of input being processed, as the transmitter carrier sequence, the output square wave amplitude directly is directly proportional to the power amplifier output-stage supply power voltage, and then can reach the purpose of controlling power output by controlling the output stage supply power voltage.
Compare power output and calibration power, and can comprise various ways according to the FEEDBACK CONTROL voltage of comparative result Modulating Power amplifier, preferably, can comprise following one of at least: obtain the power output magnitude of voltage according to power output, relatively this power output magnitude of voltage and with the corresponding calibration power magnitude of voltage of this calibration power, in the situation that the power output magnitude of voltage is greater than the calibration power magnitude of voltage, reduce FEEDBACK CONTROL voltage, otherwise, improve FEEDBACK CONTROL voltage; Relatively current amplitude and maximum permission operating current amplitude, in the situation that current amplitude allows the operating current amplitude greater than maximum, reduce FEEDBACK CONTROL voltage.
The modulation system of square-wave signal has multiple, and preferably, square-wave signal occurs with the square wave form, is data modulated signal, and wherein, the modulating mode of modulation signal is phase-shift keying, differential phase-shift keying (DPSK), frequency shift keying or amplitude keying.By above-mentioned steps, can generate the better square-wave signal of modulation effect.
Power amplifier has a variety of, preferably, can be the switching mode amplifier, and its output stage is operated on off state, is output as the bipolar square wave signal.By above-mentioned steps, change the correlation technique intermediate power amplifier and adopted the way of sinusoidal signal, and adopted the switching mode amplifier, the output bipolar square wave, and then can reach by controlling the output stage supply power voltage purpose of controlling power output.
Embodiment two
The embodiment of the present invention provides a kind of Adaptive matching power amplifier, Fig. 2 is the structured flowchart according to the Adaptive matching power amplifier of the embodiment of the present invention, as shown in Figure 2, this power amplifier comprises: detection module 10, comparison module 20, adjusting module 30.
The supply power voltage that adjusting module 30 is used for according to FEEDBACK CONTROL voltage Modulating Power amplifier output stage, and then the power output of power ratio control amplifier.
Preferably, also comprise amplifying and promote level 40, be used for the pulse signal of input is processed the generation square-wave signal, adjust the amplitude of square-wave signal according to supply power voltage, wherein, the amplitude of square-wave signal is directly proportional to supply power voltage, and utilizes the power output of power amplifier to drive square-wave signal by the transmission antennas transmit electromagnetic signal.
Preferably, amplification promotion level 40 is used for the Transistor-Transistor Logic level pulse signal of the two-way time complementation of input is modulated, and the differential amplification of the signal after modulating produces the bipolar square wave signal, then amplify the square-wave signal after modulating, and the square-wave signal after amplifying is loaded into the output stage of power amplifier.
Preferably, comparison module 20 be used for following one of at least: obtain the power output magnitude of voltage according to power output, relatively the power output magnitude of voltage and with the corresponding calibration power magnitude of voltage of calibration power, in the situation that the power output magnitude of voltage is greater than the calibration power magnitude of voltage, reduce FEEDBACK CONTROL voltage, otherwise, improve FEEDBACK CONTROL voltage; Relatively current amplitude and maximum permission operating current amplitude, in the situation that current amplitude allows the operating current amplitude greater than maximum, reduce FEEDBACK CONTROL voltage.
Embodiment three
The embodiment of the present invention provides a kind of transmitter, and this transmitter comprises the power amplifier in embodiment two.
Power amplifier adopted sinusoidal signal in the past, and coupling can only adopt transformer coupled the realization, and transformer is when load dynamic change scope is larger, and steadily output is very difficult to realize power.The present embodiment intermediate power amplifier adopts the switching mode amplifier, and output stage is operated on off state, is output as the bipolar square wave sequence, and the output square wave amplitude directly is directly proportional to the output stage supply power voltage.Therefore can reach by controlling the output stage supply power voltage purpose of controlling power output.Specifically, by the power negative-feedback technology, adjust the output stage supply power voltage of power ratio control amplifier, realize the coupling of transmitter and load by the dynamic equilibrium that realizes power output and supply power voltage.
The present embodiment has solved electromagnetic wave while-drilling and has measured the go into the well Adaptive matching problem of lower transmitter power amplifier and transmitting antenna of adverse circumstances.Under wide dynamic load variations condition, realize the Dynamic Matching of power amplifier and transmitting antenna.
Embodiment four
The embodiment of the present invention provides a kind of wireless drilling measuring system, and Fig. 2 a is the structured flowchart according to the wireless drilling measuring system of the embodiment of the present invention, and as shown in Fig. 2 a, this system comprises downhole system 2a02 and aboveground system 2a04.
Downhole system 2a02 is used for gathering and sending downhole data;
Aboveground system 2a04 is used for receiving and processing this downhole data;
Wherein, downhole system comprises the transmitter in embodiment three, be used for sending downhole data to aboveground system, this downhole data can comprise following one of at least: inclination angle, orientation, tool-face, temperature, natural gamma, pressure, electromagnetic resistivity.
Under this technical guarantee Different Strata resistivity conditions, transmitter is exported effective power by antenna, thereby ensures that aboveground system can detect signal.
Embodiment five
Fig. 3 is the structured flowchart of Adaptive matching power amplifier according to the preferred embodiment of the invention, as shown in Figure 3, this power amplifier comprises that amplification promotes level 40, complementary push-pull output stage 50, voltage and current detection circuit 60, power calculation circuit 70, power negative feedback control circuit 80, adjust power module 90, wherein, voltage and current detection circuit 60 is equivalent to the detection module in Fig. 2, power calculation circuit 70 and power negative feedback control circuit 80 are equivalent to the comparison module 20 in Fig. 2, adjustment power module 90 and complementary push-pull output stage 50 are equivalent to the adjusting module 30 in Fig. 2.
Power amplifier in the present embodiment adopts switching mode complementary push-pull amplifier, and output stage is operated in the saturation conduction state.Voltage and current detection circuit 60 is measured output voltage and electric current in real time, and power calculation circuit 70 calculates and power output.Power negative feedback control circuit 80 is power output and calibration power value (differential amplification) relatively, when power output and calibration power differ, adjust power module 90 and adjust the supply power voltage of output stage power supply by the power negative feedback, during greater than calibration power, reduce supply power voltage when power output; Increase on the contrary supply power voltage, reach according to this dynamic equilibrium of power output.
The below will describe each part of power amplifier in detail: amplify promotion level 40, complementary push-pull output stage 50, voltage and current detection circuit 60, power calculation circuit 70, power negative feedback control circuit 80, adjust power module 90.
(1) amplify promotion level 40
Fig. 3 a amplifies the circuit diagram that promotes level according to the preferred embodiment of the invention, as shown in Fig. 3 a, A1, B1 are two inputs, an end that connects respectively the first resistance 402 and the second resistance 404, the other end of the first resistance 402 is connected with the 3rd resistance 406 of parallel connection and the tie point of differential amplifier 408, the other end of the second resistance 404 is connected with the 4th resistance 410 of parallel connection and the tie point of differential amplifier 408, the other end ground connection of the 4th resistance 410.The output of differential amplifier 408 is connected with an end of the first electric capacity 412, and the other end of the first electric capacity 412 is connected with an input of follower 414, and the output of follower 414 feeds back to output voltage another input of follower 414.C1 is the output of follower 414.Follower 414 is also respectively by the second electric capacity 416 and the 3rd electric capacity 418 ground connection.
During work, the two-way Transistor-Transistor Logic level pulse train of A1, B1 two ends complementation input time forms the bipolar square wave signal after differential amplifier 408 differential amplifications.This bipolar square wave signal can be used as the transmitter carrier sequence, can corresponding change carrier frequency by changing pulse duration, realize that by the variation of controlling carrier phase phase keying produces modulation signal, this modulation signal drives through power amplifier, send electromagnetic signal by transmitting antenna to the stratum, the reception of surface well reception antenna, filtering, amplification, demodulating and decoding carry out data and recover.Follower 414 is mainly as promoting level.
(2) the complementary push-pull output stage 50
Fig. 3 b is the circuit diagram of complementary push-pull output stage according to the preferred embodiment of the invention, and as shown in Fig. 3 b, S is input, is connected with the output C1 shown in Fig. 3 a.The other end of input S is connected with the 6th resistance 504 with the 5th resistance 502 of parallel connection.The other end of the 5th resistance 502 is connected with the first power amplifier tube 506, an output of the first power amplifier tube 506 is connected with positive source, the tie point of the first power amplifier tube 506 and positive source is connected with an end of the 4th electric capacity 516, the other end ground connection of the 4th electric capacity 516, another output is connected with an end of the 7th resistance 508, and the tie point of the 7th resistance 508 and the first power amplifier tube 506 consists of an output terminals A of complementary push-pull output stage.The other end of the 7th resistance 508 is connected with the 8th resistance 510, tie point both is another output B of complementary push-pull output stage, the end that output B is connected with the 7th resistance 508 also is connected with an end of the 9th resistance 518, the other end ground connection of the 9th resistance 518.The other end of the 6th resistance 504 is connected with the input of the second power tube 512, an output termination power cathode of the second power tube 512, the second power tube 512 is connected with an end of the 5th electric capacity 514 with the tie point of power cathode, the other end ground connection of the 5th electric capacity 514, another output is connected with the other end of the 8th resistance 510.The tie point of the second power tube 512 and the 8th resistance 510 is another output C of complementary push-pull output stage.
In the present embodiment, the complementary push-pull output stage is complementary push-pull switching mode amplifier, amplify and promote level by the input S of the promotion output signal input complementary push-pull output stage of output C1 output, through the first power tube 506(N raceway groove), the second power tube 512(P raceway groove) amplify after, be loaded on load regulation nine resistance 518.The first power tube 506 and the second power tube 512 all adopt the Vmos pipe, and selected Vmos pipe is under the saturation conduction condition, and conducting resistance is very little, only has several milliohms.The 7th resistance 508, the 8th resistance 510 are sample resistance, and the 9th resistance 518 is equivalent load resistance.Suppose, complementary push-pull output stage power supply is generating positive and negative voltage V+, V-, and the 7th resistance 508 is R
3, the 8th resistance 510 is R
4, the 9th resistance 518 is R
L
Set:
V+=|V-|=U (1)
R
3=R
4=R (2)
Because Vmos pipe conducting resistance is minimum, so its power consumption can be ignored.Power amplifier output amplitude power is:
Po≈U
2*R
L/（R+R
L）2 (3)
As load R
L" during R
Po≈U
2/R
L (4)
In reality, sample resistance is as far as possible little, generally much smaller than load resistance, can reduce idle power consumption like this.
(3) voltage and current detection circuit 60
Voltage and current detection circuit 60 is used for the voltage and current amplitude of detection power amplifier output, suppose by measurement sample resistance both end voltage amplitude V
R(R
3Or R
4), therefore, output current is:
Io=V
R/R (5)
By to R
LTwo end signals carry out the voltage U o that linear detection can obtain load end, by adjust the measuring circuit gain make Io and Uo accurate.
(4) power calculation circuit 70
Fig. 3 c is the circuit diagram of power calculation circuit according to the preferred embodiment of the invention, and as shown in Fig. 3 c, power calculation circuit mainly comprises multiplier 702, the 6th electric capacity 704, the 7th electric capacity 706.
Such as, voltage U o, Io introduce respectively X1, Y1, X2, Y2, the equal ground connection of Z2, and output normalized power: PW=UoIo/10, if setting power is 10W, the normalized power magnitude of voltage is 1V.
(5) the power negative feedback control circuit 80
Power negative feedback control circuit 80 is preset standard power voltage value and measure in real time power voltage value (differential amplification) relatively, is actual power during greater than calibration power in comparative result Δ P＞0, reduces FEEDBACK CONTROL voltage V
CFEEDBACK CONTROL voltage V on the contrary raises
CThis circuit is set maximum operating currenbt I simultaneously
M, in like manner, when the calibration power current value with when measuring in real time the difference △ I of power current value＞0, reduce FEEDBACK CONTROL voltage V
CThereby, reach and control the effect that operating current is no more than the setting limiting value.Generally, only have that under or short-circuit condition minimum when load resistance, Current Control plays overcurrent protection.
(6) adjust power module 90
Adjust power module 90 and adjust power supply for electronics, be the power amplifier output-stage power supply, its control end is the control voltage V from the output of power negative feedback control circuit 80
CIts output voltage V +/V-is controlled by V
CTerminal voltage, its maximum open circuit voltage ± U
MChange V
CTerminal voltage can control adjust power module 90 outputs 0～± U
MControl voltage V
CControl and adjust power module 90 output sizes, thereby change power output.
Power negative-feedback circuit 80 according to the lowest high-current value of measured power and electric current and preset standard power relatively, when greater than the lowest high-current value of calibration power or operating current when allowing operating current greater than maximum, FEEDBACK CONTROL voltage V
CReduce that thereby the output stage supply power voltage is corresponding to be reduced; Opposite when less than the calibration power value, FEEDBACK CONTROL voltage V
CIncrease thereby increase the output stage supply power voltage, therefore realized power stage dynamic equilibrium, namely realized the Dynamic Matching of power amplifier and load.
The Dynamic Matching characteristic depends on adjusts power module 90 maximum output voltage value sizes, as load R
LDuring=0.1 Ω～6.4 Ω, set rated output power P
e=10W, maximum output voltage at least ± 8V, could satisfy the Dynamic Matching (10W is constant) in whole interval; Work as R
LDuring=0.1 Ω～50 Ω, maximum open circuit voltage is at least ± 22.4V.
It is the established standards watt level that the present embodiment allows to change rated power, satisfies different depth transmission demand.The down-hole is crept under state power supply and is mostly adopted battery-poweredly, when not needing can to set as required the selection low-power mode when high-power, saves battery power consumption, extends the down-hole battery working time.
From above description; can find out; the present invention has realized following technique effect: transless Adaptive matching switch-mode power amplifier under the dynamic load variations condition; dependable performance; efficient is higher; satisfy by rational seal approach and creep into reliable and stable work under the conditions such as vibration in state, impact, high temperature, high pressure, simultaneously, reasonably the overcurrent protection measure makes unlikely power amplifier damage under the output short-circuit state.Power amplifier output-stage is operated in switching mode, and selected pipe saturation conduction resistance is minimum, substantially is in without the heating state, and even under tens A current conditions, the Vmos power tube can not burn out.There is no simultaneously transformer, the transmitter volume dwindles greatly, adapts in measurement while drilling to use.In addition, the switching mode amplifier is operated on off state, and when particularly adopting the Vmos pipe, saturation conduction resistance is minimum, generally in several milliohms.Therefore, the power tube dissipation power can be ignored, and efficient is very high, even also can not produce excessive heat at large current work, reliability is also high.
obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step being made into the single integrated circuit module realizes.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is only the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (12)
1. the implementation method of a power amplifier, is characterized in that, comprising:
Detect in real time voltage amplitude and the current amplitude of described power amplifier output-stage and calculate power output according to described voltage amplitude and current amplitude;
More described power output and calibration power, and adjust the FEEDBACK CONTROL voltage of described power amplifier according to comparative result;
Adjust the supply power voltage of described power amplifier output-stage according to described FEEDBACK CONTROL voltage, and then control the power output of described power amplifier output-stage.
2. implementation method according to claim 1, is characterized in that, described method also comprises:
The pulse signal of input is processed the generation square-wave signal;
Adjust the amplitude of described square-wave signal according to described supply power voltage, wherein, the amplitude of described square-wave signal is directly proportional to described supply power voltage;
The power output of described power amplifier drives described square-wave signal by the transmission antennas transmit electromagnetic signal.
3. implementation method according to claim 2, is characterized in that, the pulse signal of input processed the generation square-wave signal comprise:
Transistor-Transistor Logic level pulse signal to the two-way time complementation that is input to amplifying stage carries out Data Modulation, and the differential amplification of the signal after modulating produces the bipolar square wave signal;
The amplification of described power amplifier promotes the square-wave signal after level is amplified modulation, and the square-wave signal after described amplification is driven the output stage of described power amplifier.
4. implementation method according to claim 3, is characterized in that, more described power output and calibration power, and according to the FEEDBACK CONTROL voltage that comparative result is adjusted described power amplifier comprise following one of at least:
Obtain the power output magnitude of voltage according to described power output, more described power output magnitude of voltage and with the corresponding calibration power magnitude of voltage of described calibration power, in the situation that described power output magnitude of voltage is greater than described calibration power magnitude of voltage, reduce FEEDBACK CONTROL voltage, otherwise, improve FEEDBACK CONTROL voltage;
More described current amplitude and maximum permission operating current amplitude are in the situation that described current amplitude reduces FEEDBACK CONTROL voltage greater than the described maximum operating current amplitude that allows.
5. the described implementation method of any one according to claim 1 to 4, is characterized in that, described square-wave signal is data modulated signal, and wherein, the modulating mode of described modulation signal is phase-shift keying, differential phase-shift keying (DPSK), frequency shift keying or amplitude keying.
6. the described implementation method of any one according to claim 1 to 4, it is characterized in that, described power amplifier is the switching mode amplifier, its output stage is operated on off state, be output as the bipolar square wave signal, the amplitude of described square-wave signal is determined by the supply power voltage of the output stage of described power amplifier.
7. a power amplifier, is characterized in that, comprising:
Detection module is used for detecting in real time voltage amplitude and the current amplitude of described power amplifier output-stage and calculating power output according to described voltage amplitude and current amplitude;
Comparison module is used for more described power output and calibration power, and adjusts the FEEDBACK CONTROL voltage of described power amplifier according to comparative result;
Adjusting module is used for adjusting according to described FEEDBACK CONTROL voltage the supply power voltage of described power amplifier output-stage, and then controls the power output of described power amplifier.
8. power amplifier according to claim 7, it is characterized in that, also comprise: amplify the promotion level, be used for the pulse signal of input is processed and generate the bipolar square wave signal, adjust the amplitude of described square-wave signal according to described supply power voltage, wherein, the amplitude of described square-wave signal is directly proportional to described supply power voltage, and utilizes the power output of described power amplifier to drive described square-wave signal by the transmission antennas transmit electromagnetic signal.
9. power amplifier according to claim 8, it is characterized in that, described amplification promotion level is used for the Transistor-Transistor Logic level pulse signal of the two-way time complementation of input is modulated, and the differential amplification of the signal after modulating produces the bipolar square wave signal, then amplify the square-wave signal after modulating, and the square-wave signal after described amplification is loaded into the output stage of described power amplifier.
10. the described power amplifier of any one according to claim 7 to 9, is characterized in that, described comparison module be used for following one of at least:
Obtain the power output magnitude of voltage according to described power output, more described power output magnitude of voltage and with the corresponding calibration power magnitude of voltage of described calibration power, in the situation that described power output magnitude of voltage is greater than described calibration power magnitude of voltage, reduce FEEDBACK CONTROL voltage, otherwise, improve FEEDBACK CONTROL voltage;
More described current amplitude and maximum permission operating current amplitude are in the situation that described current amplitude reduces FEEDBACK CONTROL voltage greater than the described maximum operating current amplitude that allows.
11. a transmitter is characterized in that, comprises the described power amplifier of any one in the claims 7 to 10, is used for and the transmitting antenna Dynamic Matching.
12. a wireless drilling measuring system is characterized in that, comprising:
Downhole system is used for gathering and sending downhole data;
Aboveground system is used for receiving and processing described downhole data;
Wherein, described downhole system comprises the described transmitter of claim 11, be used for sending described downhole data to described aboveground system, described downhole data comprise following one of at least: inclination angle, orientation, tool-face, temperature, natural gamma, pressure, electromagnetic resistivity.
Priority Applications (1)
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| CN104612672A (en) * | 2015-01-08 | 2015-05-13 | 中国海洋石油总公司 | Signal processing system for nuclear magnetic resonance logging instrument |
| CN104698333A (en) * | 2015-03-23 | 2015-06-10 | 广州播博科技有限公司 | Method and device for detecting and handling load faults of power amplifier |
| CN107132548A (en) * | 2017-06-22 | 2017-09-05 | 中国人民解放军第六九O五工厂 | A kind of amplifying circuit for Big Dipper search and rescue device |
| CN108868750A (en) * | 2018-09-03 | 2018-11-23 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | The pressure equaliser of caliper underground survey |
| CN109424358A (en) * | 2017-08-24 | 2019-03-05 | 中国石油化工股份有限公司 | High-power resistivity logging while drilling sender unit |
| CN110792433A (en) * | 2018-07-16 | 2020-02-14 | 中国石油化工股份有限公司 | Signal transmitting device for measurement while drilling system and cross-screw data transmission method |
| CN110855250A (en) * | 2019-11-29 | 2020-02-28 | 哈尔滨工业大学 | Linear power amplifier driving method with variable power supply voltage |
| CN111456724A (en) * | 2020-03-27 | 2020-07-28 | 华中科技大学 | Automatic tuning type underground wireless signal transmission system |
| CN113863921A (en) * | 2021-09-24 | 2021-12-31 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Near-bit wireless short transmission driving circuit and power self-adjusting method thereof |
| CN114737961A (en) * | 2022-04-15 | 2022-07-12 | 中国科学院地质与地球物理研究所 | While-drilling azimuth electromagnetic wave resistivity measuring equipment and method |
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| CN104612672A (en) * | 2015-01-08 | 2015-05-13 | 中国海洋石油总公司 | Signal processing system for nuclear magnetic resonance logging instrument |
| CN104612672B (en) * | 2015-01-08 | 2017-06-30 | 中国海洋石油总公司 | A kind of signal processing system for NMR logging instrument |
| CN104698333A (en) * | 2015-03-23 | 2015-06-10 | 广州播博科技有限公司 | Method and device for detecting and handling load faults of power amplifier |
| CN107132548A (en) * | 2017-06-22 | 2017-09-05 | 中国人民解放军第六九O五工厂 | A kind of amplifying circuit for Big Dipper search and rescue device |
| CN109424358B (en) * | 2017-08-24 | 2021-08-24 | 中国石油化工股份有限公司 | High-power resistivity signal transmitting device while drilling |
| CN109424358A (en) * | 2017-08-24 | 2019-03-05 | 中国石油化工股份有限公司 | High-power resistivity logging while drilling sender unit |
| CN110792433A (en) * | 2018-07-16 | 2020-02-14 | 中国石油化工股份有限公司 | Signal transmitting device for measurement while drilling system and cross-screw data transmission method |
| CN110792433B (en) * | 2018-07-16 | 2023-03-10 | 中国石油化工股份有限公司 | Signal transmitting device for measurement while drilling system and cross-screw data transmission method |
| CN108868750A (en) * | 2018-09-03 | 2018-11-23 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | The pressure equaliser of caliper underground survey |
| CN110855250A (en) * | 2019-11-29 | 2020-02-28 | 哈尔滨工业大学 | Linear power amplifier driving method with variable power supply voltage |
| CN110855250B (en) * | 2019-11-29 | 2023-04-18 | 哈尔滨工业大学 | Linear power amplifier driving method with variable power supply voltage |
| CN111456724A (en) * | 2020-03-27 | 2020-07-28 | 华中科技大学 | Automatic tuning type underground wireless signal transmission system |
| CN111456724B (en) * | 2020-03-27 | 2021-11-19 | 华中科技大学 | Automatic tuning type underground wireless signal transmission system |
| CN113863921A (en) * | 2021-09-24 | 2021-12-31 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Near-bit wireless short transmission driving circuit and power self-adjusting method thereof |
| CN114737961A (en) * | 2022-04-15 | 2022-07-12 | 中国科学院地质与地球物理研究所 | While-drilling azimuth electromagnetic wave resistivity measuring equipment and method |
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