CN117548314A - Control circuit of while-drilling transmitting transducer and while-drilling logging instrument - Google Patents
Control circuit of while-drilling transmitting transducer and while-drilling logging instrument Download PDFInfo
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- CN117548314A CN117548314A CN202410017080.5A CN202410017080A CN117548314A CN 117548314 A CN117548314 A CN 117548314A CN 202410017080 A CN202410017080 A CN 202410017080A CN 117548314 A CN117548314 A CN 117548314A
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- 238000005553 drilling Methods 0.000 title claims abstract description 44
- 230000005284 excitation Effects 0.000 claims abstract description 167
- 238000004891 communication Methods 0.000 claims abstract description 35
- 238000004146 energy storage Methods 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 239000003990 capacitor Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 5
- 229910052715 tantalum Inorganic materials 0.000 claims description 5
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/0207—Driving circuits
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention relates to a control circuit of a transmitting transducer while drilling and a logging while drilling instrument, wherein the control circuit comprises: the communication module is connected with the control module, receives the working instruction and forwards the received working instruction to the control module, and the working instruction comprises excitation parameters of each transmitting transducer; the control module is connected with a plurality of driving modules, each driving module is connected with one transmitting transducer, receives the working instruction forwarded by the communication module, analyzes the excitation parameters, and obtains the transmitting transducer needing excitation and the corresponding excitation signal when the corresponding transmitting transducer is excited; the driving module generates a corresponding driving signal according to the excitation signal so as to excite the transmitting transducer. The control module of the invention can analyze different excitation signals after receiving different excitation parameters, so that the control module can send out working instructions with corresponding excitation parameters according to the actual needs of the stratum in the drilling process.
Description
Technical Field
The invention belongs to the technical field of acoustic logging while drilling, and particularly relates to a control circuit of a transmitting transducer while drilling and a logging while drilling instrument.
Background
Logging while drilling may be performed while drilling, as compared to conventional wireline logging techniques. And cable logging tools cannot enter wells with a high inclination or horizontal wells, even if they can enter, with a high risk, while logging while drilling tools do not.
The logging while drilling can measure stratum information while drilling, can be used for guiding drilling and geosteering, can also determine longitudinal wave speed and transverse wave speed of a current depth well section, and is used for calculating and estimating pore pressure in real time, qualitatively identifying fluid properties, evaluating borehole stability, rock mechanical elastic parameters and the like.
When the logging while drilling instrument works underground, the transmitting transducer transmits sound wave signals, the receiving transducer receives the reflected sound wave signals and sends the reflected sound wave signals to the receiving circuit, and the receiving circuit processes the received sound wave signals so as to acquire stratum information. In the face of different stratum, the transmitting transducer is required to transmit different acoustic signals for testing, so that the transmitting control circuit of the acoustic logging while drilling instrument is required to meet the requirements of various transducer excitation modes.
Disclosure of Invention
In order to solve all or part of the problems, the invention aims to provide a control circuit of a transmitting transducer while drilling and a logging while drilling instrument, wherein the control circuit receives excitation parameters through a communication module, and the control module analyzes the excitation parameters so as to obtain corresponding excitation signals; the need to emit different acoustic signals can be achieved by setting different excitation parameters.
According to one aspect of the present invention, there is provided a control circuit for a transmit while drilling transducer, comprising:
the communication module is connected with the control module, and the communication module receives a working instruction issued by the ground system and forwards the received working instruction to the control module, wherein the working instruction comprises excitation parameters of each transmitting transducer, and for any transmitting transducer, the excitation parameters comprise: whether the transmitting transducer is excited, an enabling bit parameter, an excitation frequency parameter, a time interval parameter between two excitation, a square wave quantity parameter corresponding to each excitation, a phase parameter of an excitation signal and a frequency parameter corresponding to each excitation;
the control module is connected with a plurality of driving modules, each driving module is connected with one transmitting transducer, receives a working instruction forwarded by the communication module, analyzes the excitation parameters, and obtains the transmitting transducer to be excited and an excitation signal corresponding to the exciting of the corresponding transmitting transducer;
the driving module generates a corresponding driving signal according to the excitation signal so as to excite the corresponding transmitting transducer through the driving signal.
Further, the working instruction further comprises a frame header, and the control module judges whether the frame header of the current instruction received by the control module is consistent with the frame header of the working instruction;
if the frame head of the current instruction is inconsistent with the frame head of the working instruction, the current instruction received by the control module is not the working instruction, and the control module stops receiving the current instruction;
and if the frame head of the current instruction is consistent with the frame head of the working instruction, the current instruction received by the control module is the working instruction, and the control module continues to receive the working instruction until the length of the working instruction received by the control module is equal to the sum of the total length of all the excitation parameters and the length of the frame head.
Further, the working instruction further comprises a check code, and the length of the working instruction received by the control module is equal to the sum of the total length of all the excitation parameters, the length of the frame head and the length of the check code, and then the receiving of the working instruction is stopped;
after the control module stops receiving the working instruction, calculating a check value and judging whether the check value is consistent with the check code or not;
if the check value is inconsistent with the check code, the control module is in a state of receiving the instruction continuously, and the excitation parameter is not analyzed;
and if the check value is consistent with the check code, the control module analyzes the excitation parameter.
Further, for any one of the transmitting transducers, the control module decides whether the transmitting transducer needs to be excited according to the enabling bit parameter of the excitation parameter;
if the transmitting transducer needs to be excited, the control module generates a square wave signal as an excitation signal of the transmitting transducer, and the generated square wave signal is determined by an excitation frequency parameter, a time interval parameter, a square wave number parameter, a phase parameter and a frequency parameter.
Further, the control module adopts an MC9S12DG128 microcontroller, and each driving module is respectively connected with 4I/O ports of the MC9S12DG128 microcontroller; if one of the transmitting transducers needs to be excited, 4 paths of square wave signals are generated as excitation signals by the MC9S12DG128 microcontroller through 4I/O ports corresponding to the transmitting transducer.
Further, the device also comprises a level conversion module, each driving module is connected with the control module through one level conversion module, and the excitation signal is transmitted to the driving module after level conversion through the level conversion module.
Further, the control module generates 4 paths of 3.3V square wave signals as excitation signals; each level conversion module adopts two IR4427 chips, and each IR4427 chip converts 2 paths of 3.3V square wave signals into 2 paths of 12V square wave signals.
Further, the working instruction received by the communication module is an RS485 instruction, and after the communication module receives the RS485 instruction, the RS485 instruction is converted into a UART level signal and is forwarded to the control module; the communication module adopts an SN65HVD11 chip.
Further, the device also comprises power supply modules, wherein each driving module is connected with the power supply module, and the power supply modules are used for providing electric energy for each driving module.
Further, the power supply module comprises a power supply and a plurality of energy storage elements, and each energy storage element is connected in parallel between the positive pole and the negative pole of the power supply; the withstand voltage of each energy storage element is larger than the output voltage of the power supply; the energy storage element is a 134D series liquid tantalum capacitor.
The invention also provides a logging while drilling instrument, which comprises the control circuit.
According to the technical scheme, the control circuit of the transmitting transducer while drilling and the logging while drilling instrument provided by the invention have the following beneficial effects:
the control circuit comprises a communication module and a control module, wherein the communication module is used for receiving a working instruction, the control module is used for analyzing excitation parameters in the working instruction to obtain a result of whether each emission transducer is excited, and for the emission transducer needing excitation, the control module generates a corresponding excitation signal, and the drive module receives the excitation signal and then generates a drive signal to drive the emission transducer to excite; the control module receives different excitation parameters and can analyze different excitation signals, so that a working instruction with corresponding excitation parameters is sent out according to the actual needs of the stratum in the drilling process, and the aim of transmitting different sound wave signals through the transmitting transducer is fulfilled.
Drawings
FIG. 1 is a schematic block diagram of a control circuit for a transmit while drilling transducer according to an embodiment of the present invention;
FIG. 2 is a format diagram of a work order;
FIG. 3 is a format diagram of excitation parameters;
FIG. 4 is a schematic diagram illustrating the resolution of the number of square waves;
FIG. 5 is a schematic diagram of a level shift module before and after a square wave signal is shifted;
FIG. 6 is a schematic diagram of a power module;
the reference numerals in the drawings are: a communication module 01, a control module 02, a level conversion module 03, a power supply module 04, a power source 041, an energy storage element 042, a driving module 05 and a transmitting transducer 06.
Detailed Description
For a better understanding of the objects, structures and functions of the present invention, a control circuit for a transmit while drilling transducer and a logging while drilling tool according to the present invention will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, a control circuit of a while-drilling transmitting transducer according to an embodiment of the present invention is shown, including a communication module 01, a control module 02 and a driving module 05, where the communication module 01 is connected with the control module 02, the communication module 01 receives a working instruction issued by a ground system, and forwards the received working instruction to the control module 02, the working instruction includes an excitation parameter of each transmitting transducer 06, and for any transmitting transducer 06, the excitation parameters include: an enable bit parameter of whether to excite the transmitting transducer 06, an excitation frequency parameter of exciting the transmitting transducer 06, a time interval parameter between two excitations, a square wave number parameter corresponding to each excitation, a phase parameter of an excitation signal and a frequency parameter corresponding to each excitation. Wherein the phase parameter of the excitation signal means that the first half period of each square wave is positive and the second half period is negative, or that the first half period of each square wave is negative and the second half period is positive.
The control module 02 is connected with a plurality of driving modules 05, each driving module 05 is connected with one transmitting transducer 06, the control module 02 receives a working instruction forwarded by the communication module 01, and analyzes excitation parameters in the working instruction to obtain the transmitting transducer 06 needing excitation and corresponding excitation signals when the corresponding transmitting transducer 06 is excited.
The drive module 05 generates a corresponding drive signal as a function of the excitation signal in order to excite the corresponding transmitting transducer 06 with the drive signal.
Specifically, taking an example including 6 driving modules 05 and 6 transmitting transducers 06, the control module 02 is connected to the 6 driving modules 05, and each driving module 05 is connected to one transmitting transducer 06. The excitation parameters received by the communication module 01 comprise a parameter 1, a parameter 2, a parameter 3, a parameter 4, a parameter 5 and a parameter 6, and the communication module 01 forwards the working instruction to the control module 02 after receiving the working instruction with the excitation parameters. The control module 02 analyzes the excitation parameters in the working instruction, and the analysis of the excitation parameters by the control module 02 comprises the following steps: judging which excitation parameters of the parameters 1-6 correspond to the excitation parameters which need to excite the transmitting transducer 06, and analyzing the excitation parameters which need to excite the transmitting transducer 06 to obtain corresponding excitation signals when exciting the transmitting transducer 06. After receiving the excitation signal, the driving module 05 drives the transmitting transducer 06 to excite according to the excitation signal.
Again, the excitation parameters received by the control module 02 include excitation parameters of 6 transmitting transducers 06, the control module 02 divides the received excitation parameters into 6 corresponding to 6 transmitting transducers 06 according to the length of each excitation parameter, for example, as shown in fig. 2, the excitation parameters of each transmitting transducer 06 are 16 bits, and after the control module 02 receives the excitation parameters, each 16 bits of data corresponds to the excitation parameters of one transmitting transducer 06. In particular implementations, the length of the excitation parameter corresponding to each transmitting transducer 06 may also be set to other values as desired.
The control circuit comprises a communication module 01 and a control module 02, wherein the communication module 01 is used for receiving a working instruction, the control module 02 is used for analyzing excitation parameters in the working instruction to obtain a result of whether each emission transducer 06 is excited, the control module 02 generates a corresponding excitation signal for the emission transducer 06 needing excitation, and the driving module 05 generates a driving signal to drive the emission transducer 06 to excite after receiving the excitation signal; the control module 02 receives different excitation parameters and can analyze different excitation signals, so that a working instruction with corresponding excitation parameters is sent out according to the actual needs of the stratum in the drilling process, and the aim of transmitting different sound wave signals through the transmitting transducer 06 is fulfilled.
In a specific embodiment, the working instruction further includes a frame header, and the control module 02 determines whether the frame header of the current instruction received by the control module is consistent with the frame header of the working instruction; if the frame head of the current instruction is inconsistent with the frame head of the working instruction, the current instruction received by the control module 02 is not the working instruction, and the control module 02 stops receiving the current instruction; if the frame head of the current instruction is consistent with the frame head of the working instruction, the current instruction received by the control module 02 is the working instruction, and the control module 02 continues to receive the working instruction until the length of the working instruction received by the control module 02 is equal to the sum of the total length of all excitation parameters and the length of the frame head.
In this embodiment, the working instruction further includes a frame header, where the frame header is set to screen the current instruction received by the control module 02, so as to ensure that the control module 02 subsequently analyzes real excitation parameters, and avoid the situation that the control module 02 sends out an error excitation signal.
Specifically, when the control module 02 receives the current instruction, the frame header is received first, and the work instruction issued by the ground system comprises a specific frame header, so after the control module 02 receives the frame header of the current instruction, whether the current instruction is the work instruction is judged according to whether the frame header of the current instruction is consistent with the frame header of the work instruction or not; if the frame head of the current instruction is consistent with the frame head of the working instruction, the current instruction is the working instruction, and the control module 02 continues to receive the current instruction and analyzes the excitation parameters in the current instruction, namely the working instruction; if the frame header of the current instruction and the frame header of the work instruction are not consistent, the current instruction is not the work instruction, and the control module 02 stops receiving the current instruction.
For the case that the current instruction received by the control module 02 is a working instruction, the control module 02 determines the time for stopping receiving the current instruction according to the total length of the received current instruction. Specifically, when the total length of the current instruction received by the control module 02 is equal to the sum of the total length of all excitation parameters and the length of the frame header, the current instruction is stopped, and the analysis of the excitation parameters in the current instruction, that is, the working instruction, is started. Taking 6 driving modules 05 and 6 transmitting transducers 06 as an example, as shown in fig. 2, excitation parameters corresponding to each transmitting transducer 06 are 16 bits, the length of a frame head is also 16 bits, and after the control module 02 determines that the received current instruction is a working instruction, the total length of the received working instruction is equal to (6+1) ×16bits.
In a specific embodiment, the working instruction further includes a check code, and the control module 02 stops receiving the working instruction after the length of the working instruction received by the control module is equal to the sum of the total length of all excitation parameters, the length of the frame header and the length of the check code; after the control module 02 stops receiving the working instruction, calculating a check value and judging whether the check value is consistent with the check code; if the check value is inconsistent with the check code, the control module 02 continues to be in a state of receiving the instruction, and the excitation parameters are not analyzed; if the check value is consistent with the check code, the control module 02 parses the excitation parameters.
Specifically, the working instruction further includes a check code, the total length of the working instruction received by the control module 02 is equal to the sum of the total length of all excitation parameters, the length of the frame header and the length of the check code, the working instruction is stopped being received after the total length of the working instruction received by the control module 02 is equal to the sum of the lengths, the check value is calculated, and whether the received instruction is in error is judged according to the calculated check value and the received check code.
In specific implementation, as shown in fig. 2, the check code may also be set to 16 bits, and when the control module 02 determines that the current instruction is a working instruction according to the frame header, the control module 02 stops receiving the working instruction and starts calculating the check value when the total length of the working instruction received by the control module 02 is equal to (6+1+1) ×16 bits.
The control module 02 determines whether the excitation parameters in the working instruction need to be analyzed according to the calculated check value and the received check code. If the check value is inconsistent with the received check code, indicating that the received working instruction is wrong, the control module 02 continues to be in a state of receiving the working instruction, and does not analyze the excitation parameters; if the check value is consistent with the received check code, the control module 02 parses the excitation parameters.
In one embodiment, for any one transmitting transducer 06, the control module 02 determines whether the transmitting transducer 06 needs to be excited according to the enable bit parameter of the excitation parameter;
if the transmitting transducer 06 needs to be excited, the control module 02 generates a square wave signal as the excitation signal of the transmitting transducer 06, and the generated square wave signal is determined by the excitation frequency parameter, the time interval parameter, the square wave number parameter, the phase parameter and the frequency parameter.
As can be seen from the foregoing, after the control module 02 determines that the check value matches the check code, the excitation parameters in the work instruction are analyzed. In the excitation parameters, the enable bit parameter is at the highest position of the excitation parameters, so the control module 02 first analyzes the enable bit parameter to determine whether the corresponding transmitting transducer 06 needs to be excited. In specific implementation, for example, the enabling bit parameter is 0 and 1, when the enabling bit parameter is 0, it indicates that the transmitting transducer 06 corresponding to the driving parameter does not need to be excited, and when the enabling bit parameter is 1, it indicates that the transmitting transducer 06 corresponding to the driving parameter needs to be excited.
For any transmitting transducer 06, if the transmitting transducer 06 needs to be excited, the control module 02 generates a corresponding square wave signal as an excitation signal of the transmitting transducer 06 according to the excitation frequency parameter, the time interval parameter, the square wave number parameter, the phase parameter and the frequency parameter of the excitation parameter.
Specifically, taking each excitation parameter as 16 bits as an example, the format of the excitation parameter is shown in fig. 3, the highest bit (HSB) of the excitation parameter in fig. 3 is the enabled bit, and the corresponding parameter is the enabled bit parameter, so the control module 02 first analyzes the enabled bit parameter to determine whether to excite the transmitting transducer 06 corresponding to the excitation parameter. Taking fig. 3 as an example again, bit 14 to Bit 13 of the excitation parameter is the time interval parameter between two excitations; the 12 th Bit to the 9 th Bit of the excitation parameter are the excitation frequency parameters for exciting the transmitting transducer 06; the 8 th Bit to the 6 th Bit of the excitation parameter are square wave quantity parameters corresponding to each excitation; the 5 th Bit of the excitation parameter is the phase parameter of the excitation signal; the 4 th Bit to 0 th Bit (least significant Bit, LSB) of the excitation parameters are frequency parameters corresponding to each excitation.
In the specific implementation, for example, when the 14 th Bit to the 13 th Bit are 00, the time interval between the two excitations is 100ms, when 01, the time interval between the two excitations is 200ms, when 10, the time interval between the two excitations is 300ms, and when 11, the time interval between the two excitations is 400ms; bits 12 to 9 represent excitation 1 time when Bit 0000, excitation 2 times when Bit 0001, excitation 3 times when Bit 0010, and so on, excitation 16 times when Bit 1111; the 8 th Bit to the 6 th Bit are 000, which means that the number of square waves for each excitation is 1, the number of square waves for each excitation is 2, the number of square waves for each excitation is 3, the number of square waves for each excitation is 011, the number of square waves for each excitation is 4, and so on, the number of square waves for each excitation is 111, and the number of square waves for each excitation is 8, as shown in fig. 4, the number of square waves is 1, 2, and 4; the 5 th Bit being 0 indicates that the first half period of each square wave is positive, as in the square wave shown in fig. 4, and 1 indicates that the first half period of each square wave is negative; bits 4 to 0 indicate the frequency parameters of each excitation, and there are 32 frequencies in total.
In a specific embodiment, the control module 02 adopts an MC9S12DG128 microcontroller, and each driving module 05 is connected with 4I/O ports of the MC9S12DG128 microcontroller; if a certain transmitting transducer 06 needs to be excited, 4 paths of square wave signals are generated by the MC9S12DG128 microcontroller through 4I/O ports corresponding to the transmitting transducer 06 as excitation signals.
Specifically, the control module 02 of the embodiment adopts the MC9S12DG128 microcontroller, and each driving module 05 is respectively connected with 4I/O ports of the MC9S12DG128 microcontroller, so as to achieve the purpose of outputting a group of 4 paths of square wave signals through each 4I/O ports of the MC9S12DG128 microcontroller. Specifically, when the enabling bit parameter of the excitation parameter is 1, the transmitting transducer 06 corresponding to the excitation parameter needs to be excited, and the MC9S12DG128 microcontroller outputs a group of 4-path square wave signals with 4I/O ports corresponding to the transmitting transducer 06.
In a specific embodiment, as shown in fig. 1, the driving device further includes a level conversion module 03, each driving module 05 is connected to the control module 02 through one level conversion module 03, and the excitation signal is sent to the driving module 05 after level conversion by the level conversion module 03.
The level conversion module 03 of the present embodiment is configured to convert a low-level excitation signal into a high-level excitation signal.
Specifically, for example, the control module 02, i.e. the 4I/O ports of the MC9S12DG128 microcontroller, generates 4 paths of 3.3V square wave signals as excitation signals; as shown in fig. 5, each level conversion module 03 employs two IR4427 chips, and each IR4427 chip converts 2 paths of 3.3V square wave signals into 2 paths of 12V square wave signals.
In this embodiment, each IR4427 chip converts 2 paths of 3.3V square wave signals into 2 paths of 12V square wave signals, and the input and output are in phase during the conversion process. The 4-way square wave signal processed by the level conversion module 03 is sent to the corresponding driving module 05.
In a specific embodiment, the working instruction received by the communication module 01 is an RS485 instruction, and after receiving the RS485 instruction, the communication module 01 converts the RS485 instruction into a UART level signal and forwards the UART level signal to the control module 02; the communication module 01 employs an SN65HVD11 chip.
Specifically, the communication module 01 receives the working instruction of the transmitting transducer 06 through a twisted pair, the working instruction received by the communication module 01 is an RS485 standard instruction, and after the communication module 01 receives the RS485 standard instruction, the RS485 standard instruction is converted into a UART level signal and sent to the control module 02. In specific implementation, for example, the communication module 01 employs an SN65HVD11 chip.
In a specific embodiment, as shown in fig. 1, the driving device further includes a power supply module 04, where each driving module 05 is connected to the power supply module 04, and the power supply module 04 is used to provide power for each driving module 05.
In this embodiment, the driving module 05 provides high voltage power through the power module 04, so as to generate corresponding driving signals to excite the transmitting transducer 06.
Specifically, as shown in fig. 6, the power supply module 04 includes a power source 041 and a plurality of energy storage elements 042, where each energy storage element 042 is connected in parallel between the positive pole and the negative pole of the power source 041; the withstand voltage of each energy storage element 042 is greater than the output voltage of the power source 041; the energy storage element 042 is a 134D series liquid tantalum capacitor.
In specific implementation, the power source 041 can select different power source modules with 50V-100V output according to the requirement, the power source 041 charges the energy storage element 042, and the electric energy stored in the energy storage element 042 is released when the transmitting transducer 06 is excited. Because the emission transducer 06 consumes a large amount of power at the moment of excitation, if the energy storage element 042 is not provided with energy at the same time, the excitation energy of the emission transducer 06 is lower.
The energy storage element 042 is formed by connecting 8 capacitors with 150uF capacity in parallel, the total capacity is 1200uF, the capacitor is 134D series liquid tantalum capacitor 134D157X9125K6, the withstand voltage of the capacitor is 125V, the maximum voltage of the high-voltage module is 100V, and the energy storage capacitor needs to be left with allowance because of larger power-on instant voltage. The 134D series liquid tantalum capacitor is high-temperature resistant, has small volume under the condition of the same capacity, and can meet the size requirement of the acoustic logging while drilling circuit instrument.
The embodiment of the invention further provides a logging while drilling instrument, which comprises the control circuit of any one embodiment.
The control circuit comprises a communication module 01 and a control module 02, wherein the communication module 01 is used for receiving a working instruction, the control module 02 is used for analyzing excitation parameters in the working instruction to obtain a result of whether each emission transducer 06 is excited, the control module 02 generates a corresponding excitation signal for the emission transducer 06 needing excitation, and the driving module 05 generates a driving signal to drive the emission transducer 06 to excite after receiving the excitation signal; the control module 02 receives different excitation parameters and can analyze different excitation signals, so that a working instruction with corresponding excitation parameters is sent out according to the actual needs of the stratum in the drilling process, and the aim of transmitting different sound wave signals through the transmitting transducer 06 is fulfilled.
It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.
Furthermore, the terms "a," "an," "the" and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is two or more unless specifically defined otherwise.
In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (11)
1. A control circuit for a transmit while drilling transducer, comprising:
the communication module is connected with the control module, and the communication module receives a working instruction issued by the ground system and forwards the received working instruction to the control module, wherein the working instruction comprises excitation parameters of each transmitting transducer, and for any transmitting transducer, the excitation parameters comprise: whether the transmitting transducer is excited, an enabling bit parameter, an excitation frequency parameter, a time interval parameter between two excitation, a square wave quantity parameter corresponding to each excitation, a phase parameter of an excitation signal and a frequency parameter corresponding to each excitation;
the control module is connected with a plurality of driving modules, each driving module is connected with one transmitting transducer, receives a working instruction forwarded by the communication module, analyzes the excitation parameters, and obtains the transmitting transducer to be excited and an excitation signal corresponding to the exciting of the corresponding transmitting transducer;
the driving module generates a corresponding driving signal according to the excitation signal so as to excite the corresponding transmitting transducer through the driving signal.
2. The control circuit of the while-drilling transmitting transducer according to claim 1, wherein the working instruction further comprises a frame header, and the control module judges whether the frame header of the current instruction received by the control module is consistent with the frame header of the working instruction;
if the frame head of the current instruction is inconsistent with the frame head of the working instruction, the current instruction received by the control module is not the working instruction, and the control module stops receiving the current instruction;
and if the frame head of the current instruction is consistent with the frame head of the working instruction, the current instruction received by the control module is the working instruction, and the control module continues to receive the working instruction until the length of the working instruction received by the control module is equal to the sum of the total length of all the excitation parameters and the length of the frame head.
3. The control circuit of the while-drilling transmitting transducer according to claim 2, wherein the working instruction further comprises a check code, and the length of the working instruction received by the control module is equal to the sum of the total length of all the excitation parameters, the length of the frame header and the length of the check code, and then the working instruction is stopped from being received;
after the control module stops receiving the working instruction, calculating a check value and judging whether the check value is consistent with the check code or not;
if the check value is inconsistent with the check code, the control module is in a state of receiving the instruction continuously, and the excitation parameter is not analyzed;
and if the check value is consistent with the check code, the control module analyzes the excitation parameter.
4. The control circuit of a transmit while drilling transducer of claim 1, wherein for any one of the transmit transducers, the control module determines whether the transmit transducer needs to be excited based on an enable bit parameter of the excitation parameter;
if the transmitting transducer needs to be excited, the control module generates a square wave signal as an excitation signal of the transmitting transducer, and the generated square wave signal is determined by an excitation frequency parameter, a time interval parameter, a square wave number parameter, a phase parameter and a frequency parameter.
5. The control circuit of the while-drilling transmitting transducer according to claim 4, wherein the control module adopts an MC9S12DG128 microcontroller, and each driving module is respectively connected with 4I/O ports of the MC9S12DG128 microcontroller; if one of the transmitting transducers needs to be excited, 4 paths of square wave signals are generated as excitation signals by the MC9S12DG128 microcontroller through 4I/O ports corresponding to the transmitting transducer.
6. The control circuit of a transmit while drilling transducer of claim 1, further comprising level shifting modules, each of the driving modules being coupled to the control module by one of the level shifting modules, the excitation signal being level shifted by the level shifting module and then sent to the driving module.
7. The control circuit of the transmit while drilling transducer of claim 6, wherein the control module generates 4 paths of 3.3V square wave signals as excitation signals; each level conversion module adopts two IR4427 chips, and each IR4427 chip converts 2 paths of 3.3V square wave signals into 2 paths of 12V square wave signals.
8. The control circuit of the while-drilling transmitting transducer according to claim 1, wherein the working instruction received by the communication module is an RS485 instruction, and the communication module converts the RS485 instruction into a UART level signal and forwards the UART level signal to the control module after receiving the RS485 instruction; the communication module adopts an SN65HVD11 chip.
9. The control circuit of a transmit while drilling transducer of claim 1, further comprising power supply modules, each of the drive modules being connected to the power supply module, the power supply module being configured to provide electrical power to each of the drive modules.
10. The control circuit of a transmit while drilling transducer of claim 9, wherein the power module comprises a power source and a plurality of energy storage elements, each of the energy storage elements being connected in parallel between a positive pole and a negative pole of the power source; the withstand voltage of each energy storage element is larger than the output voltage of the power supply; the energy storage element is a 134D series liquid tantalum capacitor.
11. A logging while drilling tool comprising a control circuit as claimed in any one of claims 1 to 10.
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| CN202410017080.5A CN117548314A (en) | 2024-01-05 | 2024-01-05 | Control circuit of while-drilling transmitting transducer and while-drilling logging instrument |
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| CN202410017080.5A CN117548314A (en) | 2024-01-05 | 2024-01-05 | Control circuit of while-drilling transmitting transducer and while-drilling logging instrument |
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