Multi-pole sound source acoustic logging broadband excitation method, device, equipment and medium

Abstract

The invention relates to the exploration and development technology of oil and gas fields, and discloses a multipolar sound source acoustic logging broadband excitation method, which comprises the following steps of: generating an energy storage capacitor of high-voltage direct current according to the high-voltage direct current, and applying the energy storage capacitor to a preset transmitting transformer to obtain a high-power transmitting transformer; a plurality of Blackman-Harris window function first-order derivative signals of the micro-control unit are utilized to generate an analog voltage waveform of the Blackman-Harris window function first-order derivative signals; and generating a high-power waveform of the analog voltage waveform, performing transformation ratio processing on the high-power waveform according to the high-power transmitting transformer to obtain a high-voltage transmitting waveform of the high-power waveform, and performing broadband pulse excitation on the acoustic wave transducer by using the high-voltage transmitting waveform. The invention further provides a multipolar sound source acoustic logging broadband excitation method, device and equipment and a medium. The accuracy of acoustic logging can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas field exploration and development, and in particular to a multi-pole sound source acoustic wave logging broadband excitation method, device, electronic equipment and computer-readable storage medium. Background Art

[0002] This section is intended to provide a background or context to the embodiments recited in the claims. No admission is made that the description herein is prior art by inclusion in this section.

[0003] During the exploration and development of oil and gas fields, acoustic logging is used to measure the P- and S-wave velocities of the formation and the rock mechanical parameters of the formation, and is mainly used for lithology classification, formation comparison, calculation of formation porosity, determination of formation brittleness index, etc. Acoustic logging applies a certain excitation signal through the excitation sound source, propagates the sound wave in the wellbore, and then uses the receiver array to receive the sound wave train, and comprehensively processes the received signal to obtain the required formation information.

[0004] The quality of acoustic logging data is affected by the excitation signal of the transmitting transducer, and because the slowness of the formation varies widely, the excited acoustic signal is required to be a wide-band excitation signal. On the other hand, since the acoustic transmitting transducers we usually use are made of piezoelectric ceramic materials, there are usually several resonance points. If the excitation signal is not used properly, interference signals will often appear, affecting the logging quality. In order to obtain high-quality logging data, high-power and wide-band acoustic source excitation technology is essential.

[0005] High-power rectangular pulses are widely used sound source excitation signals. Rectangular pulse excitation must meet the impedance matching of the power transformer and the sound source transducer. Its operating main frequency is mainly determined by the main frequency of the sound source transducer. In addition, due to the low efficiency of rectangular pulse excitation, relatively obvious side lobes and grating lobes will appear. Sine wave pulse excitation is different from rectangular pulse excitation. The main frequency of its excitation waveform has nothing to do with the main frequency of the sound wave transmitting transducer. Under the condition that the main frequency of the sine wave excitation pulse signal is determined, by changing the number of cycles of the excitation signal, the bandwidth of the excitation signal can be controlled to be effectively located within the sound insulation resistance band of the instrument. However, the use of the same sine wave excitation pulse signal still cannot eliminate the side lobes and grating lobes, resulting in obvious clutter. Summary of the invention

[0006] In view of the above problems, embodiments of the present invention provide a method, device, electronic device and computer-readable storage medium for broadband excitation of multi-pole acoustic logging.

[0007] In a first aspect, an embodiment of the present invention provides a broadband excitation method for multi-pole acoustic logging, comprising:

[0008] Generate a high-voltage direct current according to a preset high-voltage power supply, generate an energy storage capacitor for the high-voltage direct current according to the high-voltage direct current, and apply the energy storage capacitor to a preset transmitting transformer to obtain a high-power transmitting transformer;

[0009] Acquiring a multi-pole sound source type of an acoustic wave transducer, and determining a signal excitation frequency of the acoustic wave transducer according to the multi-pole sound source type;

[0010] Generate a plurality of Blackman-Harris window function first-order derivative signals of the microcontroller unit according to the signal excitation frequency, perform digital-to-analog conversion on the Blackman-Harris window function first-order derivative signals, and obtain analog voltage waveforms of the Blackman-Harris window function first-order derivative signals;

[0011] The analog voltage waveform is power-amplified by a preset transmitting drive circuit to obtain a high-power waveform of the analog voltage waveform, the high-power waveform is ratio-processed according to the high-power transmitting transformer to obtain a high-voltage transmitting waveform of the high-power waveform, and the acoustic wave transducer is subjected to broadband pulse excitation by the high-voltage transmitting waveform.

[0012] According to an embodiment of the present invention, generating a high voltage direct current according to a preset high voltage power supply includes:

[0013] Generate a primary DC signal according to a preset high-voltage power supply, and perform high-frequency inversion conversion on the primary DC signal to obtain a primary AC signal of the primary DC signal;

[0014] Performing high-frequency voltage conversion on the primary AC signal to obtain a secondary AC signal of the primary AC signal;

[0015] A high voltage direct current with a preset voltage value is generated according to the secondary alternating current signal.

[0016] According to an embodiment of the present invention, the energy storage capacitor for generating the high voltage direct current according to the high voltage direct current includes:

[0017] Determine the operating parameters of the energy storage capacitor according to the high voltage direct current, and generate the upper limit and lower limit of the number of parallel modules in the energy storage capacitor according to the operating parameters;

[0018] The value range of the number of parallel modules is determined according to the upper limit value and the lower limit value, the optimal solution of the number of parallel modules in the energy storage capacitor is determined according to the genetic algorithm and the value range, and the high-voltage DC energy storage capacitor is generated according to the optimal solution.

[0019] According to an embodiment of the present invention, the step of generating a plurality of Blackman-Harris window function first-order derivative signals of a microcontroller unit according to the signal excitation frequency includes:

[0020] The first-order derivative of the Blackman-Harris window function is generated using the following Blackman-Harris window function:

[0021]

[0022] Wherein, n=1, 2, ..., N-1, N represents the total length of the window function, M represents the effective length of the window function, and N represents the total length of the window function;

[0023] Determining a signal parameter of a signal to be generated according to the signal excitation frequency and the first-order derivative;

[0024] A plurality of Blackman-Harris window function first-order derivative signals of the microcontroller unit are generated according to the signal parameters.

[0025] According to an embodiment of the present invention, performing digital-to-analog conversion on the first-order derivative signal of the Blackman-Harris window function to obtain an analog voltage waveform of the first-order derivative signal of the Blackman-Harris window function includes:

[0026] Separating the first-order derivative signal of the Blackman-Harris window function into a precision loss part signal, a precision retention part signal and a standard part signal according to a preset waveform threshold interval;

[0027] The signal of the precision loss part is reduced by multiples and then input into the low channel of the three-way combined digital-to-analog converter to obtain a loss simulation waveform of the signal of the precision loss part;

[0028] Amplifying the signal of the retained precision part by multiples and inputting it into the high channel of the three-way combined digital-to-analog converter to obtain a retained analog waveform of the signal of the retained precision part;

[0029] The standard partial signal is input into the middle channel of the three-way combined digital-to-analog converter to obtain a standard analog waveform of the standard partial signal, and the loss analog waveform, the retained analog waveform and the standard analog waveform are combined into an analog voltage waveform of the first-order derivative signal of the Blackman-Harris window function.

[0030] According to an embodiment of the present invention, the step of reducing the precision loss signal by multiples and inputting the signal into a low channel of a three-way combined digital-to-analog converter to obtain a loss simulation waveform of the precision loss signal includes:

[0031] Reducing the precision-loss partial signal by multiples to obtain a loss-reduced signal of the precision-loss partial signal;

[0032] The loss simulation waveform of the loss reduction signal is generated by using the following signal digital-to-analog conversion algorithm in the three-way combined digital-to-analog converter:

[0033]

[0034] e -jωt =cos(ωt)-j sin(ωt)

[0035] Wherein, F(ω) is the loss simulation waveform, c is the loss reduction signal, e -jωt is the conversion variable, e is the natural logarithm, j is the imaginary unit, ω is the angular velocity, t is the time, cos(ωt) is the horizontal coordinate on the coordinate axis when the loss reduction signal is converted into the loss simulation waveform, and sin(ωt) is the vertical coordinate on the coordinate axis when the loss reduction signal is converted into the loss simulation waveform.

[0036] According to an embodiment of the present invention, performing ratio processing on the high-power waveform according to the high-power transmitting transformer to obtain a high-voltage transmitting waveform of the high-power waveform includes:

[0037] Generate a primary voltage value and a secondary voltage value of the high-power transmitting transformer, and obtain a voltage quotient of the high-power transmitting transformer according to the primary voltage value and the secondary voltage value;

[0038] Determining a wiring mode of the high-power transmitting transformer, and determining a transformation coefficient of the high-power transmitting transformer according to the wiring mode and the voltage quotient;

[0039] The high-power waveform is subjected to transformation ratio processing according to the transformation coefficient to obtain a high-voltage emission waveform of the high-power waveform.

[0040] In a second aspect, an embodiment of the present invention provides a broadband excitation device for acoustic logging using a multi-pole sound source, characterized in that it includes:

[0041] An energy storage capacitor module is used to generate a high-voltage direct current according to a preset high-voltage power supply, generate an energy storage capacitor for the high-voltage direct current according to the high-voltage direct current, and apply the energy storage capacitor to a preset transmitting transformer to obtain a high-power transmitting transformer;

[0042] A signal excitation frequency module, used to obtain the multi-pole sound source type of the sound wave transducer, and determine the signal excitation frequency of the sound wave transducer according to the multi-pole sound source type;

[0043] A digital-to-analog conversion module, used for generating a plurality of Blackman-Harris window function first-order derivative signals of a microcontroller unit according to the signal excitation frequency, performing digital-to-analog conversion on the Blackman-Harris window function first-order derivative signals, and obtaining analog voltage waveforms of the Blackman-Harris window function first-order derivative signals;

[0044] The pulse excitation module is used to use a preset transmitting drive circuit to power amplify the analog voltage waveform to obtain a high-power waveform of the analog voltage waveform, perform ratio processing on the high-power waveform according to the high-power transmitting transformer to obtain a high-voltage transmitting waveform of the high-power waveform, and use the high-voltage transmitting waveform to perform broadband pulse excitation on the acoustic wave transducer.

[0045] In a third aspect, an embodiment of the present invention provides an electronic device, comprising:

[0046] processor;

[0047] a memory for storing instructions executable by the processor;

[0048] The processor is configured to execute the instructions to implement a broadband excitation method for multi-pole acoustic wave logging as described in the first aspect.

[0049] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a multi-pole sound source acoustic logging broadband excitation method as described in the first aspect.

[0050] Compared with the prior art, the above technical solution of the present invention has the following beneficial effects:

[0051] The embodiment of the present invention generates a high voltage direct current by using a preset high voltage power supply, generates an energy storage capacitor of the high voltage direct current according to the high voltage direct current, ensures that sufficient energy is provided, and performs power balance on the circuit in the acoustic wave transducer, wherein the preset high voltage power supply is used to load a high voltage pulse on the acoustic wave transducer, thereby achieving the purpose of reducing interference signals and obtaining high-quality logging data, thereby improving the logging accuracy, determining the signal excitation frequency of the acoustic wave transducer according to the acquired multi-pole sound source type, and generating multiple Blackman-Harris window function first-order derivative signals of the microcontroller unit according to the signal excitation frequency, which can be controlled by transmitting a signal The frequency of the acoustic transducer is made to be excited within the effective frequency band, and the first-order derivative signal of the Blackman-Harris window function is converted into digital-to-analog format to obtain an analog voltage waveform of the first-order derivative signal of the Blackman-Harris window function. The generated analog voltage waveform based on the first-order derivative signal of the Blackman-Harris window function is free of side lobes and grating lobes, which greatly suppresses the generation of clutter, thereby improving the accuracy of acoustic logging. Therefore, the multi-pole sound source acoustic logging broadband excitation method, device, electronic device and computer-readable storage medium proposed in the present invention can solve the problem of low accuracy of acoustic logging. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0053] Figure 1 A flowchart showing a broadband excitation method for multi-pole acoustic logging according to a first embodiment of the present invention is shown;

[0054] Figure 2 A flowchart showing the process of generating high voltage direct current from a preset high voltage power supply according to the first embodiment of the present invention is shown;

[0055] Figure 3 The flowchart of the process of performing ratio processing on the high-power waveform according to the first embodiment of the present invention is shown;

[0056] Figure 4 A functional module diagram showing a multi-pole sound source acoustic logging broadband excitation device according to a third embodiment of the present invention;

[0057] Figure 5 The waveform of the first-order derivative pulse signal of the Blackman-Harris window function in the first embodiment of the present invention is shown;

[0058] Figure 6 The spectrum of the first-order derivative pulse signal of the Blackman-Harris window function in the first embodiment of the present invention is shown;

[0059] Figure 7 The first-order derivative pulse signals of the Blackman-Harris window function of various frequencies in the first embodiment of the present invention are shown;

[0060] Figure 8 The block diagram of the Blackman-Harris window function first-order derivative pulse signal excitation device in the fourth embodiment of the present invention is shown;

[0061] Fig. 9 The schematic diagram of the structure of the electronic device for implementing the multi-pole sound source acoustic logging broadband excitation method in the fifth embodiment of the present invention is shown. DETAILED DESCRIPTION

[0062] The present disclosure is further described below in conjunction with the embodiments shown in the accompanying drawings.

[0063] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0064] The present invention proposes a broadband excitation method for multi-pole acoustic well logging based on a pulse excitation signal of the first-order derivative of the Blackman-Harris window function. Based on the theory of generating a pulse excitation signal based on the first-order derivative of the Blackman-Harris window function, the pulse excitation signal is loaded onto the acoustic transducer in combination with analog-to-digital conversion, high-voltage energy storage, power amplification and other methods to achieve broadband pulse excitation. For the same acoustic transducer, signals of different voltages and frequencies can be excited multiple times to achieve specific detection requirements. Compared with traditional methods, multi-pole acoustic well logging based on a pulse excitation signal of the first-order derivative of the Blackman-Harris window function has higher accuracy and reduces interference from clutter, and has great potential and application prospects in acoustic well logging applications.

[0065] Embodiment 1

[0066] like Figure 1 As shown, the present invention proposes a broadband excitation method for multi-pole acoustic source acoustic logging, comprising the following steps:

[0067] S1. Generate a high-voltage direct current according to a preset high-voltage power supply, generate an energy storage capacitor for the high-voltage direct current according to the high-voltage direct current, and apply the energy storage capacitor to a preset transmitting transformer to obtain a high-power transmitting transformer.

[0068] In an embodiment of the present invention, the preset high-voltage power supply ensures to provide sufficient energy, the energy storage capacitor is used to balance the voltage in the circuit, and the preset high-voltage power supply is generally composed of a high-power AC / DC or DC / DC power supply.

[0069] In detail, the purpose of using the preset high-voltage power supply is to reduce interference signals and obtain high-quality logging data by loading high-voltage pulses on the acoustic transducer, thereby improving the logging quality.

[0070] In detail, the high voltage direct current refers to a high voltage current whose direction and time do not change periodically, but the current magnitude may not be fixed, thereby generating a waveform.

[0071] In the embodiment of the present invention, Figure 2 As shown, the generation of high voltage direct current according to a preset high voltage power supply includes:

[0072] S21, generating a primary DC signal according to a preset high-voltage power supply, and performing high-frequency inversion conversion on the primary DC signal to obtain a primary AC signal of the primary DC signal;

[0073] S22, performing high-frequency voltage conversion on the primary AC signal to obtain a secondary AC signal of the primary AC signal;

[0074] S23, generating a high voltage direct current with a preset voltage value according to the secondary alternating current signal.

[0075] In detail, the preset high-voltage power supply refers to a power supply with an output voltage of more than five kilovolts, and the DC signal is a signal whose amplitude does not change within any time interval; the high-frequency inverter conversion refers to inverting the primary DC signal into a primary AC signal, wherein the primary DC signal is low-voltage DC power, and the primary AC signal is high-frequency low-voltage AC power.

[0076] In detail, the high-frequency voltage conversion can be achieved using a high-frequency transformer, which is a power transformer with an operating frequency exceeding 10kHz. The use of the high-frequency transformer can improve the signal conversion efficiency between the primary AC signal and the secondary AC signal; the high-frequency transformer has low standby power, relatively high efficiency, and is light in weight and small in size.

[0077] In detail, the high-voltage direct current with a preset voltage value generated according to the secondary AC signal is realized by using a DC transformer, and the DC transformer converts one DC voltage into another or more DC voltages, and realizes the conversion of one DC voltage into another or more DC voltages proportional to it through high-frequency chopping, transformer isolation, and high-frequency rectification.

[0078] In an embodiment of the present invention, the energy storage capacitor for generating the high voltage direct current according to the high voltage direct current includes:

[0079] Determine the operating parameters of the energy storage capacitor according to the high voltage direct current, and generate the upper limit and lower limit of the number of parallel modules in the energy storage capacitor according to the operating parameters;

[0080] The value range of the number of parallel modules is determined according to the upper limit value and the lower limit value, the optimal solution of the number of parallel modules in the energy storage capacitor is determined according to the genetic algorithm and the value range, and the high-voltage DC energy storage capacitor is generated according to the optimal solution.

[0081] In detail, the operating parameters include but are not limited to: rated voltage, rated capacity, size (length * width * height), internal resistance (fully charged), maximum discharge current, self-discharge (25°C), charging voltage, terminals, recommended charging current, recommended operating temperature, etc.

[0082] In detail, one of the energy storage capacitors is composed of a number of battery modules. When the battery modules are connected in parallel, the battery modules are parallel modules. For example, assuming that the teaching building is a battery pack, each classroom in it is a module, and the students in the classroom are battery cells, and the battery cells and parallel modules in the battery pack are connected in parallel through wires to form a whole.

[0083] In detail, the genetic algorithm is a computational model of the biological evolution process that simulates the natural selection and genetic mechanisms of Darwin's theory of biological evolution. It is a method for searching for the optimal solution by simulating the natural evolution process. The algorithm uses mathematical methods and computer simulation operations to convert the problem-solving process into processes similar to the crossover and mutation of chromosome genes in biological evolution. When solving more complex combinatorial optimization problems, it can usually obtain better optimization results faster than some conventional optimization algorithms. Therefore, the genetic algorithm can be used to obtain the optimal solution for the number of parallel modules in the energy storage capacitor.

[0084] S2. Acquire the multi-pole sound source type of the sound wave transducer, and determine the signal excitation frequency of the sound wave transducer according to the multi-pole sound source type.

[0085] In an embodiment of the present invention, the sound source types of the acoustic wave transducer include: a monopole sound source, a dipole sound source, and a quadrupole sound source, etc., and the multipole sound source type refers to a combination of any one, two, or three of the monopole sound source, dipole sound source, and quadrupole sound source.

[0086] In detail, the multi-pole sound source type of the sound wave transducer represents different working modes of the sound wave transducer.

[0087] In detail, the monopole sound source is also called a pulsating sound source. It is formed due to the uneven mass or heat flowing into the medium. The monopole sound source is like a pulsating sphere. The sound wavefronts generated by the monopole sound source are in phase, but the radiation of the monopole sound source has no directional characteristics, and its sound radiation power is proportional to the fourth power of the airflow velocity; the dipole sound source is a force sound source, for example: the sound of wind blowing on wires, air compressors, moving blades and guide vanes, propellers with non-zero inclination angles are common examples of dipole sound sources. The dipole can be regarded as two monopoles with a phase difference of 1800, and its radiated sound power is proportional to the sixth power of the airflow velocity; the quadrupole sound source is a medium in which there is no mass or heat injection, and there are no obstacles. It is formed by the sound waves radiated by viscous stress. It belongs to the stress sound source. Subsonic turbulent injection noise is the most common quadrupole sound source. The quadrupole can be regarded as a pair of dipoles with opposite polarities, and its radiated sound power is proportional to the eighth power of the airflow velocity.

[0088] In detail, the signal excitation frequency of the sound wave transducer is determined according to the type of the multipole sound source, such as using 10K Hz signal excitation for a monopole source sound wave transducer, using 2K Hz signal excitation for a dipole source sound wave transducer, using 10K Hz signal excitation for a quadrupole source sound wave transducer, etc.

[0089] S3. Generate multiple Blackman-Harris window function first-order derivative signals of the microcontroller unit according to the signal excitation frequency, perform digital-to-analog conversion on the Blackman-Harris window function first-order derivative signals, and obtain analog voltage waveforms of the Blackman-Harris window function first-order derivative signals.

[0090] In the embodiment of the present invention, the frequency and bandwidth of the pulse signal generated by different signal excitation frequencies are different. In detail, the purpose of generating multiple Blackman-Harris window function first-order derivative signals of the microcontroller unit according to the signal excitation frequency is to eliminate obvious side lobes and grating lobes, thereby reducing the existence rate of clutter, that is, the first-order derivative signal of the Blackman-Harris window function has no side lobes and grating lobes, which greatly suppresses the generation of clutter and improves the excitation efficiency of the transducer.

[0091] Furthermore, generating a plurality of Blackman-Harris window function first-order derivative signals of the microcontroller unit according to the signal excitation frequency means controlling the frequency of the transmitting signal so that the excitation of the acoustic wave transducer is within an effective frequency band.

[0092] In an embodiment of the present invention, the step of generating a plurality of Blackman-Harris window function first-order derivative signals of a microcontroller unit according to the signal excitation frequency includes:

[0093] The first-order derivative of the Blackman-Harris window function is generated using the following Blackman-Harris window function:

[0094]

[0095] Wherein, n=1, 2, ..., N-1, N represents the total length of the window function, M represents the effective length of the window function, and N represents the total length of the window function;

[0096] Determining a signal parameter of a signal to be generated according to the signal excitation frequency and the first-order derivative;

[0097] A plurality of Blackman-Harris window function first-order derivative signals of the microcontroller unit are generated according to the signal parameters.

[0098] In the embodiment of the present invention, Figure 5 As shown, the waveform of the first-order derivative pulse signal of the Blackman-Harris window function can be generated by a single-chip microcomputer or a DSP chip and a digital signal can be output. The shape of the first-order derivative pulse signal of the Blackman-Harris window function is obtained by taking the first-order derivative of the Blackman-Harris window function.

[0099] Further, a frequency spectrum of the first-order derivative signal of the Blackman-Harris window function is generated according to the first-order derivative signal of the Blackman-Harris window function, Figure 6 As shown, it can be seen from the spectrum diagram that the first-order derivative signal of the Blackman-Harris window function has a large bandwidth range, and what is particularly critical is that the first-order derivative signal of the Blackman-Harris window function has no side lobes and grating lobes, which greatly suppresses the generation of clutter and improves the excitation efficiency of the transducer. It can also control the frequency of the transmitted signal so that the excitation of the acoustic wave transducer is within the effective frequency band.

[0100] In detail, the signal parameters include the waveform, amplitude, frequency, time, unit of the signal, the amplitude, frequency, phase parameters of each frequency component of the signal, the structure and purity of the signal, and the characteristics of the channel (transmission line and network system) through which the signal passes; the waveform includes but is not limited to: sine wave, square wave, sawtooth wave, random wave, first-order derivative wave of Blackman-Harris window function, etc., the time includes but is not limited to: simulation time, external signal, etc.; the form of the amplitude includes but is not limited to: scalar, vector, matrix, etc.; the form of the frequency includes but is not limited to: scalar, vector, matrix, etc.

[0101] Furthermore, a waveform corresponding to the corresponding signal parameter is generated according to a waveform generation model, wherein the waveform generation model may be a Signal Generator, a system function of Verilog HDL, or the like.

[0102] In the embodiment of the present invention, Figure 7 As shown, the multiple Blackman-Harris window function first-order derivative signals of the microcontroller unit are generated according to the signal excitation frequency, such as: the monopole source acoustic wave transducer is excited by a signal excitation frequency of 2KHz, the dipole source acoustic wave transducer is excited by a signal excitation frequency of 6K Hz, the quadrupole source acoustic wave transducer is excited by a signal excitation frequency of 10K Hz, etc. Corresponding to different multipole acoustic wave transducers, the first-order derivative pulse signals of the Blackman-Harris window function of different frequencies can be generated by the transmission control MCU circuit.

[0103] In an embodiment of the present invention, performing digital-to-analog conversion on the first-order derivative signal of the Blackman-Harris window function to obtain an analog voltage waveform of the first-order derivative signal of the Blackman-Harris window function includes:

[0104] Separating the first-order derivative signal of the Blackman-Harris window function into a precision loss part signal, a precision retention part signal and a standard part signal according to a preset waveform threshold interval;

[0105] The signal of the precision loss part is reduced by multiples and then input into the low channel of the three-way combined digital-to-analog converter to obtain a loss simulation waveform of the signal of the precision loss part;

[0106] Amplifying the signal of the retained precision part by multiples and inputting it into the high channel of the three-way combined digital-to-analog converter to obtain a retained analog waveform of the signal of the retained precision part;

[0107] The standard partial signal is input into the middle channel of the three-way combined digital-to-analog converter to obtain a standard analog waveform of the standard partial signal, and the loss analog waveform, the retained analog waveform and the standard analog waveform are combined into an analog voltage waveform of the first-order derivative signal of the Blackman-Harris window function.

[0108] In detail, separating the first-order derivative signal of the Blackman-Harris window function into a precision loss portion signal, a precision retention portion signal and a standard portion signal according to a preset waveform threshold interval means that the first-order derivative signal of the Blackman-Harris window function that is higher than the upper limit of the preset waveform threshold interval in the first-order derivative signal of the Blackman-Harris window function is determined as the precision loss portion signal; the first-order derivative signal of the Blackman-Harris window function that is lower than the lower limit of the preset waveform threshold interval in the first-order derivative signal of the Blackman-Harris window function is determined as the precision retention portion signal; and the first-order derivative signal of the Blackman-Harris window function that is between the preset waveform threshold interval in the first-order derivative signal of the Blackman-Harris window function is determined as the standard portion signal.

[0109] In detail, the three-way combined digital-to-analog converter means that the digital-to-analog converter includes three channels: a low channel, a middle channel and a high channel, and the digital-to-analog converter converts a digital signal into an analog signal.

[0110] In detail, an electrical signal amplifier may be used to amplify the signal of the precision-retaining portion by multiples.

[0111] In detail, the signal of the lost precision part is reduced by multiples and then input into the low channel of the three-way combined digital-to-analog converter to obtain the loss simulation waveform of the signal of the lost precision part, including:

[0112] Reducing the precision-loss partial signal by multiples to obtain a loss-reduced signal of the precision-loss partial signal;

[0113] The loss simulation waveform of the loss reduction signal is generated by using the following signal digital-to-analog conversion algorithm in the three-way combined digital-to-analog converter:

[0114]

[0115] e -jωt =cos(ωt)-j sin(ωt)

[0116] Wherein, F(ω) is the loss simulation waveform, c is the loss reduction signal, e -jωt is the conversion variable, e is the natural logarithm, j is the imaginary unit, ω is the angular velocity, t is the time, cos(ωt) is the horizontal coordinate on the coordinate axis when the loss reduction signal is converted into the loss simulation waveform, and sin(ωt) is the vertical coordinate on the coordinate axis when the loss reduction signal is converted into the loss simulation waveform.

[0117] In detail, the first-order derivative signal of the Blackman-Harris window function is a digital signal, and the first-order derivative signal of the Blackman-Harris window function can be converted into an analog signal through a digital-to-analog conversion controller and a corresponding filtering circuit.

[0118] Furthermore, filters can be used to generate the corresponding filtering circuits, and the cutoff frequency of each filter is a fixed proportion of the waveform sampling rate. The response of a "normal" filter is -3dB at 27% of the sampling rate, and the response of a "step" filter is -3dB at 13% of the sampling rate. For example, for an arbitrary waveform with a sampling rate of 100MSa / s, the -3dB frequency bandwidth of the "normal" filter is 27MHz.

[0119] S4. Use a preset transmitting drive circuit to perform power amplification on the analog voltage waveform to obtain a high-power waveform of the analog voltage waveform, perform ratio processing on the high-power waveform according to the high-power transmitting transformer to obtain a high-voltage transmitting waveform of the high-power waveform, and use the high-voltage transmitting waveform to perform broadband pulse excitation on the acoustic wave transducer.

[0120] In the embodiment of the present invention, Figure 3 As shown, the high-power waveform is subjected to transformation ratio processing according to the high-power transmitting transformer to obtain a high-voltage transmitting waveform of the high-power waveform, including:

[0121] S31, generating a primary voltage value and a secondary voltage value of the high-power transmitting transformer, and obtaining a voltage quotient of the high-power transmitting transformer according to the primary voltage value and the secondary voltage value;

[0122] S32, determining a wiring mode of the high-power transmitting transformer, and determining a transformation coefficient of the high-power transmitting transformer according to the wiring mode and the voltage quotient;

[0123] S33. Perform transformation ratio processing on the high-power waveform according to the transformation coefficient to obtain a high-voltage transmission waveform of the high-power waveform.

[0124] In detail, the transformation ratio processing refers to amplifying or reducing the high-power waveform according to the voltage ratio or current ratio of the high-power transmitting transformer, and the transformation ratio coefficient refers to the voltage or current ratio between the primary winding and the secondary winding of the high-power transmitting transformer.

[0125] In detail, the primary voltage value and the secondary voltage value of the high-power transmitting transformer are generated by applying a voltage to the high-power transmitting transformer at a time, then measuring the voltage across the high-power transmitting transformer, and dividing the voltage across the two ends to obtain the voltage quotient of the high-power transmitting transformer, that is, the primary voltage value and the secondary voltage value are the voltage across the high-power transmitting transformer.

[0126] In detail, the connection mode of the high-power transmitting transformer should be considered as D connection mode or Y connection mode. When the connection mode is D connection mode, the phase voltage is equal to the line voltage. When the connection mode is Y connection mode, Times the phase voltage is equal to the line voltage. When the wiring method is D connection, the phase voltage cannot be measured directly, so the ratio of the line voltage is used.

[0127] In detail, the ratio processing of the high-power waveform is to amplify the high-power waveform.

[0128] The embodiment of the present invention generates high-voltage direct current by using a preset high-voltage power supply, generates an energy storage capacitor for the high-voltage direct current according to the high-voltage direct current, ensures that sufficient energy is provided, and performs power balance on the circuit in the acoustic wave transducer, wherein the preset high-voltage power supply is used to load a high-voltage pulse on the acoustic wave transducer, thereby achieving the purpose of reducing interference signals and obtaining high-quality logging data, thereby improving the logging accuracy, determining the signal excitation frequency of the acoustic wave transducer according to the acquired multi-pole sound source type, and generating multiple Blackman-Harris window function first-order derivative signals of the microcontroller unit according to the signal excitation frequency, which can By controlling the frequency of the transmitting signal so that the excitation of the acoustic wave transducer is within the effective frequency band, the first-order derivative signal of the Blackman-Harris window function is converted into digital-to-analog format to obtain an analog voltage waveform of the first-order derivative signal of the Blackman-Harris window function. The generated analog voltage waveform based on the first-order derivative signal of the Blackman-Harris window function is free of side lobes and grating lobes, which greatly suppresses the generation of clutter, thereby improving the accuracy of acoustic logging. Therefore, the multi-pole sound source acoustic logging broadband excitation method proposed in the present invention can solve the problem of low acoustic logging accuracy.

[0129] Embodiment 2

[0130] In order to better understand the present invention, a second embodiment is used below to further explain the situation in which the acoustic wave transducer needs to have stronger impact resistance.

[0131] In an embodiment of the present invention, generating a high voltage direct current according to a preset high voltage power supply includes:

[0132] Generate a primary DC signal according to a preset high-voltage power supply, and perform low-frequency inversion conversion on the primary DC signal to obtain an intermediate AC signal of the primary DC signal;

[0133] Performing low-frequency voltage conversion on the intermediate AC signal to obtain a final AC signal of the intermediate AC signal;

[0134] A high voltage direct current with a preset voltage value is generated according to the ultimate alternating current signal.

[0135] In an embodiment of the present invention, the preset high-voltage power supply ensures to provide sufficient energy, the energy storage capacitor is used to balance the voltage in the circuit, and the preset high-voltage power supply is generally composed of a high-power AC / DC or DC / DC power supply.

[0136] In detail, the high voltage direct current refers to a high voltage current whose direction and time do not change periodically, but the current magnitude may not be fixed, thereby generating a waveform.

[0137] In detail, the preset high-voltage power supply refers to a power supply with an output voltage of more than five kilovolts, and the DC signal is a signal whose amplitude does not change within any time interval; the low-frequency inverter conversion refers to inverting the primary DC signal into an intermediate AC signal, wherein the primary DC signal is low-voltage DC power, and the intermediate AC signal is low-frequency and low-voltage AC power.

[0138] In detail, the low-frequency voltage conversion can be achieved by using a low-frequency transformer, which refers to an "industrial frequency transformer", which is an instrument used to change voltage and works at 50 Hz.

[0139] In detail, the high-voltage direct current with a preset voltage value generated according to the final AC signal is realized by using a DC transformer, and the DC transformer converts one DC voltage into another or more DC voltages, and realizes the conversion of one DC voltage into another or more DC voltages proportional to it through high-frequency chopping, transformer isolation, and high-frequency rectification.

[0140] Embodiment 3

[0141] like Figure 4 As shown, this embodiment also provides a functional module diagram of a multi-pole sound source acoustic logging broadband excitation device.

[0142] The multi-pole sound source acoustic logging broadband excitation device 100 described in this embodiment can be installed in an electronic device. According to the functions to be implemented, the multi-pole sound source acoustic logging broadband excitation device 100 may include an energy storage capacitor module 101, a signal excitation frequency module 102, a digital-to-analog conversion module 103, and a pulse excitation module 104. The module described in the present invention can also be referred to as a unit, which refers to a series of computer program segments that can be executed by an electronic device processor and can complete fixed functions, which are stored in the memory of the electronic device.

[0143] In this embodiment, the functions of each module / unit are as follows:

[0144] The energy storage capacitor module 101 is used to generate a high-voltage direct current according to a preset high-voltage power supply, generate the energy storage capacitor of the high-voltage direct current according to the high-voltage direct current, and apply the energy storage capacitor to a preset transmitting transformer to obtain a high-power transmitting transformer;

[0145] The signal excitation frequency module 102 is used to obtain the multi-pole sound source type of the sound wave transducer, and determine the signal excitation frequency of the sound wave transducer according to the multi-pole sound source type;

[0146] The digital-to-analog conversion module 103 is used to generate a plurality of Blackman-Harris window function first-order derivative signals of the microcontroller unit according to the signal excitation frequency, and perform digital-to-analog conversion on the Blackman-Harris window function first-order derivative signals to obtain analog voltage waveforms of the Blackman-Harris window function first-order derivative signals;

[0147] The pulse excitation module 104 is used to use a preset transmitting drive circuit to power amplify the analog voltage waveform to obtain a high-power waveform of the analog voltage waveform, perform ratio processing on the high-power waveform according to the high-power transmitting transformer to obtain a high-voltage transmitting waveform of the high-power waveform, and use the high-voltage transmitting waveform to perform broadband pulse excitation on the acoustic wave transducer.

[0148] In detail, each module described in the multi-pole sound source acoustic logging broadband excitation device 100 described in the embodiment of the present invention adopts the same technical means as the multi-pole sound source acoustic logging broadband excitation method described in Example 1 and Example 2 when in use, and can produce the same technical effects, which will not be repeated here.

[0149] Embodiment 4

[0150] like Figure 8As shown, this embodiment also provides a block diagram of a Blackman-Harris window function first-order derivative pulse signal excitation device, wherein the transmission control MCU generates a transmission voltage waveform according to different working modes of the multipole sound wave, and after passing through the DA and the corresponding filtering circuit, it becomes an analog voltage waveform; the high-voltage power supply generates a DC high voltage to store energy in the energy storage capacitor, and the energy storage capacitor is used for high-voltage sound wave transmission; after the analog transmission waveform is power amplified by the transmission drive circuit, it is transformed into a high-voltage transmission waveform by the high-power transmission transformer to drive the multi-stage sound wave transducer to transmit.

[0151] Embodiment 5

[0152] like Fig. 9 As shown, this embodiment also provides a computer electronic device, which may include a processor 10, a memory 11, a communication bus 12 and a communication interface 13, and may also include a computer program stored in the memory 11 and executable on the processor 10, such as a multi-pole acoustic source acoustic logging broadband excitation program.

[0153] In some embodiments, the processor 10 may be composed of an integrated circuit, for example, a single packaged integrated circuit, or a plurality of packaged integrated circuits with the same or different functions, including one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and combinations of various control chips, etc. The processor 10 is the control core (ControlUnit) of the electronic device, and uses various interfaces and lines to connect various components of the entire electronic device, and executes various functions of the electronic device and processes data by running or executing programs or modules stored in the memory 11 (for example, executing a multi-pole acoustic source acoustic logging broadband excitation program, etc.), and calling data stored in the memory 11.

[0154] The memory 11 includes at least one type of readable storage medium, and the readable storage medium includes a flash memory, a mobile hard disk, a multimedia card, a card-type memory (for example, SD or DX memory, etc.), a magnetic memory, a disk, an optical disk, etc. In some embodiments, the memory 11 may be an internal storage unit of an electronic device, such as a mobile hard disk of the electronic device. In other embodiments, the memory 11 may also be an external storage device of an electronic device, such as a plug-in mobile hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the electronic device. Further, the memory 11 may also include both an internal storage unit of the electronic device and an external storage device. The memory 11 may not only be used to store application software and various types of data installed in the electronic device, such as the code of a broadband excitation program of a multi-pole acoustic source acoustic logging, but may also be used to temporarily store data that has been output or is to be output.

[0155] The communication bus 12 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. The bus is configured to realize connection and communication between the memory 11 and at least one processor 10, etc.

[0156] The communication interface 13 is used for communication between the above-mentioned electronic device and other devices, including a network interface and a user interface. Optionally, the network interface may include a wired interface and / or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), which is generally used to establish a communication connection between the electronic device and other electronic devices. The user interface may be a display (Display), an input unit (such as a keyboard (Keyboard)), and optionally, the user interface may also be a standard wired interface, a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, and an OLED (Organic Light-Emitting Diode, organic light-emitting diode) touch device, etc. Among them, the display may also be appropriately referred to as a display screen or a display unit, which is used to display information processed in the electronic device and to display a visual user interface.

[0157] Fig. 9 Only an electronic device with components is shown, and those skilled in the art can understand that Fig. 9The structure shown in the figure does not constitute a limitation on the electronic device, and may include fewer or more components than shown in the figure, or combine certain components, or arrange the components differently.

[0158] For example, although not shown, the electronic device may also include a power source (such as a battery) for supplying power to each component. Preferably, the power source may be logically connected to the at least one processor 10 through a power management device, so that the power management device can realize functions such as charging management, discharging management, and power consumption management. The power source may also include one or more DC or AC power sources, recharging devices, power failure detection circuits, power converters or inverters, power status indicators, and other arbitrary components. The electronic device may also include a variety of sensors, Bluetooth modules, Wi-Fi modules, etc., which will not be repeated here.

[0159] It should be understood that the embodiment is for illustration only and the scope of the patent application is not limited to this structure.

[0160] The multi-pole acoustic source acoustic logging broadband excitation program stored in the memory 11 in the electronic device is a combination of multiple instructions. When running in the processor 10, it can achieve:

[0161] Generate a high-voltage direct current according to a preset high-voltage power supply, generate an energy storage capacitor for the high-voltage direct current according to the high-voltage direct current, and apply the energy storage capacitor to a preset transmitting transformer to obtain a high-power transmitting transformer;

[0162] Acquiring a multi-pole sound source type of an acoustic wave transducer, and determining a signal excitation frequency of the acoustic wave transducer according to the multi-pole sound source type;

[0163] Generate a plurality of Blackman-Harris window function first-order derivative signals of the microcontroller unit according to the signal excitation frequency, perform digital-to-analog conversion on the Blackman-Harris window function first-order derivative signals, and obtain analog voltage waveforms of the Blackman-Harris window function first-order derivative signals;

[0164] The analog voltage waveform is power-amplified by a preset transmitting drive circuit to obtain a high-power waveform of the analog voltage waveform, the high-power waveform is ratio-processed according to the high-power transmitting transformer to obtain a high-voltage transmitting waveform of the high-power waveform, and the acoustic wave transducer is subjected to broadband pulse excitation by the high-voltage transmitting waveform.

[0165] Specifically, the specific implementation method of the processor 10 for the above instructions can refer to the description of the relevant steps in the corresponding embodiment of the accompanying drawings, which will not be repeated here.

[0166] Furthermore, if the module / unit integrated in the electronic device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. The computer-readable storage medium can be volatile or non-volatile. For example, the computer-readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a mobile hard disk, a magnetic disk, an optical disk, a computer memory, and a read-only memory (ROM).

[0167] Embodiment 6

[0168] This embodiment provides a storage medium storing a computer program. When the computer program is executed by a processor, the steps of the broadband excitation method for multi-pole acoustic logging are implemented as described above.

[0169] These program codes can also be loaded onto a computer or other programmable data processing device so that a series of operation steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 The steps of a specified function in a process or multiple processes.

[0170] Storage media include permanent and non-permanent, removable and non-removable media, and can be implemented by any method or technology to store information. Information can be computer-readable instructions, data structures, modules of programs or other data. Examples of storage media can include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission medium that can be used to store information that can be accessed by a computing device.

[0171] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. When the terms "include" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0172] It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or described herein.

[0173] In the several embodiments provided by the present invention, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the modules is only a logical function division, and there may be other division methods in actual implementation.

[0174] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0175] In addition, each functional module in each embodiment of the present invention may be integrated into one processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional modules.

[0176] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0177] Therefore, no matter from which point of view, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is limited by the appended claims rather than the above description, so it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any attached figure mark in the claims should not be regarded as limiting the claims involved.

[0178] The embodiments of the present application can acquire and process relevant data based on artificial intelligence technology. Among them, artificial intelligence (AI) is the theory, method, technology and application system that uses digital computers or machines controlled by digital computers to simulate, extend and expand human intelligence, perceive the environment, acquire knowledge and use knowledge to obtain the best results.

[0179] In addition, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in the system claim can also be implemented by one unit or device through software or hardware. The words first, second, etc. are used to indicate names, and do not indicate any particular order.

[0180] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A broadband excitation method for multi-pole acoustic logging, characterized in that: The method comprises: Generate a high-voltage direct current according to a preset high-voltage power supply, generate an energy storage capacitor for the high-voltage direct current according to the high-voltage direct current, and apply the energy storage capacitor to a preset transmitting transformer to obtain a high-power transmitting transformer; Acquiring a multi-pole sound source type of an acoustic wave transducer, and determining a signal excitation frequency of the acoustic wave transducer according to the multi-pole sound source type; Generate a plurality of Blackman-Harris window function first-order derivative signals of the microcontroller unit according to the signal excitation frequency, perform digital-to-analog conversion on the Blackman-Harris window function first-order derivative signals, and obtain analog voltage waveforms of the Blackman-Harris window function first-order derivative signals; The analog voltage waveform is power-amplified by a preset transmitting drive circuit to obtain a high-power waveform of the analog voltage waveform, the high-power waveform is ratio-processed according to the high-power transmitting transformer to obtain a high-voltage transmitting waveform of the high-power waveform, and the acoustic wave transducer is subjected to broadband pulse excitation by the high-voltage transmitting waveform.

2. The broadband excitation method for multi-pole acoustic logging according to claim 1, characterized in that: The step of generating a high voltage direct current according to a preset high voltage power supply comprises: Generate a primary DC signal according to a preset high-voltage power supply, and perform high-frequency inversion conversion on the primary DC signal to obtain a primary AC signal of the primary DC signal; Performing high-frequency voltage conversion on the primary AC signal to obtain a secondary AC signal of the primary AC signal; A high voltage direct current with a preset voltage value is generated according to the secondary alternating current signal.

3. The broadband excitation method for multi-pole acoustic logging according to claim 1, characterized in that: The energy storage capacitor for generating the high voltage direct current according to the high voltage direct current comprises: Determine the operating parameters of the energy storage capacitor according to the high voltage direct current, and generate the upper limit and lower limit of the number of parallel modules in the energy storage capacitor according to the operating parameters; The value range of the number of parallel modules is determined according to the upper limit value and the lower limit value, the optimal solution of the number of parallel modules in the energy storage capacitor is determined according to the genetic algorithm and the value range, and the high-voltage DC energy storage capacitor is generated according to the optimal solution.

4. The broadband excitation method for multi-pole acoustic logging according to claim 1, characterized in that: The method of generating a plurality of Blackman-Harris window function first-order derivative signals of the microcontroller unit according to the signal excitation frequency comprises: The first-order derivative of the Blackman-Harris window function is generated using the following Blackman-Harris window function: Wherein, n=1, 2, ..., N-1, N represents the total length of the window function, M represents the effective length of the window function, and N represents the total length of the window function; Determining a signal parameter of a signal to be generated according to the signal excitation frequency and the first-order derivative; A plurality of Blackman-Harris window function first-order derivative signals of the microcontroller unit are generated according to the signal parameters.

5. The broadband excitation method for multi-pole acoustic logging according to claim 1, characterized in that: The step of performing digital-to-analog conversion on the first-order derivative signal of the Blackman-Harris window function to obtain an analog voltage waveform of the first-order derivative signal of the Blackman-Harris window function comprises: Separating the first-order derivative signal of the Blackman-Harris window function into a precision loss part signal, a precision retention part signal and a standard part signal according to a preset waveform threshold interval; The signal of the precision loss part is reduced by multiples and then input into the low channel of the three-way combined digital-to-analog converter to obtain a loss simulation waveform of the signal of the precision loss part; Amplifying the signal of the retained precision part by multiples and inputting it into the high channel of the three-way combined digital-to-analog converter to obtain a retained analog waveform of the signal of the retained precision part; The standard partial signal is input into the middle channel of the three-way combined digital-to-analog converter to obtain a standard analog waveform of the standard partial signal, and the loss analog waveform, the retained analog waveform and the standard analog waveform are combined into an analog voltage waveform of the first-order derivative signal of the Blackman-Harris window function.

6. The broadband excitation method for multi-pole acoustic logging according to claim 5, characterized in that: The step of reducing the precision loss signal by multiples and inputting the signal into the low channel of the three-way combined digital-to-analog converter to obtain the loss simulation waveform of the precision loss signal includes: Reducing the precision-loss partial signal by multiples to obtain a loss-reduced signal of the precision-loss partial signal; The loss simulation waveform of the loss reduction signal is generated by using the following signal digital-to-analog conversion algorithm in the three-way combined digital-to-analog converter: e -jωt =cos(ωt)-j sin(ωt) Wherein, F(ω) is the loss simulation waveform, c is the loss reduction signal, e -jωt is the conversion variable, e is the natural logarithm, j is the imaginary unit, ω is the angular velocity, t is the time, cos(ωt) is the horizontal coordinate on the coordinate axis when the loss reduction signal is converted into the loss simulation waveform, and sin(ωt) is the vertical coordinate on the coordinate axis when the loss reduction signal is converted into the loss simulation waveform.

7. The broadband excitation method for multi-pole acoustic logging according to claim 1, characterized in that: The step of performing ratio processing on the high-power waveform according to the high-power transmitting transformer to obtain a high-voltage transmitting waveform of the high-power waveform includes: Generate a primary voltage value and a secondary voltage value of the high-power transmitting transformer, and obtain a voltage quotient of the high-power transmitting transformer according to the primary voltage value and the secondary voltage value; Determining a wiring mode of the high-power transmitting transformer, and determining a transformation coefficient of the high-power transmitting transformer according to the wiring mode and the voltage quotient; The high-power waveform is subjected to transformation ratio processing according to the transformation coefficient to obtain a high-voltage emission waveform of the high-power waveform.

8. A broadband excitation device for multi-pole acoustic logging, characterized in that: The device comprises: An energy storage capacitor module is used to generate a high-voltage direct current according to a preset high-voltage power supply, generate an energy storage capacitor for the high-voltage direct current according to the high-voltage direct current, and apply the energy storage capacitor to a preset transmitting transformer to obtain a high-power transmitting transformer; A signal excitation frequency module, used to obtain the multi-pole sound source type of the sound wave transducer, and determine the signal excitation frequency of the sound wave transducer according to the multi-pole sound source type; A digital-to-analog conversion module, used for generating a plurality of Blackman-Harris window function first-order derivative signals of a microcontroller unit according to the signal excitation frequency, performing digital-to-analog conversion on the Blackman-Harris window function first-order derivative signals, and obtaining analog voltage waveforms of the Blackman-Harris window function first-order derivative signals; The pulse excitation module is used to use a preset transmitting drive circuit to power amplify the analog voltage waveform to obtain a high-power waveform of the analog voltage waveform, perform ratio processing on the high-power waveform according to the high-power transmitting transformer to obtain a high-voltage transmitting waveform of the high-power waveform, and use the high-voltage transmitting waveform to perform broadband pulse excitation on the acoustic wave transducer.

9. An electronic device, comprising: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the instructions to implement the broadband excitation method for multi-pole acoustic logging as claimed in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the program is executed by a processor, the multi-pole sound source acoustic wave logging broadband excitation method as described in any one of claims 1 to 7 is implemented.

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