Launching system of time-domain electromagnetic method resistivity detection instrument in cased well and operation method

Abstract

The invention belongs to the technical field of electromagnetic instruments in the field of energy logging and resource detection, and particularly relates to a time-domain electromagnetic resistivity detection instrument transmitting system in a cased well and an operation method, S1, an upper joint suite and a lower joint suite are used for being connected with other instruments; s2, the energy storage system adopts a novel energy storage material, has high energy density and rapid charging and discharging capability, and provides stable energy supply for the emission system; the step-up module comprises a power supply circuit and a protection circuit, and the power supply circuit is used for converting a ground direct-current high-voltage power supply into a low-voltage direct-current power supply for a circuit through an isolation type DC / DC after common-mode filtering of the ground direct-current high-voltage power supply; according to the invention, the transmitting system composed of multiple components is constructed and is matched with a specific circuit design and operation method, so that the problem of through-metal casing logging in a deep well is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of electromagnetic method instruments in the fields of energy logging and resource exploration, and specifically relates to a transmitting system and operating method of a time-domain electromagnetic method resistivity detection instrument in a cased well. Background Art

[0002] As the development of oil and gas resources in China enters the middle and late stages, most oil fields are in the middle and late stages of exploration and development. The distribution of remaining oil is complex and difficult to accurately monitor. Through-casing resistivity logging, as an important means to quantitatively evaluate the oil and gas content of reservoirs, is of great significance for understanding reservoir dynamics and improving oil recovery.

[0003] Currently, the time-domain electromagnetic method (TEM) has become the preferred method for dynamic monitoring of oil and gas reservoirs due to its advantages such as high resolution, strong anti-interference ability, and low production cost. However, applying this method in cased wells faces many challenges. On the one hand, existing ground electromagnetic emission system instruments cannot be directly applied to deep wells, and it is difficult to meet the requirements of the downhole complex environment for the temperature and pressure resistance of the instruments. On the other hand, traditional logging systems have problems such as limited detection range and low resolution, and cannot effectively break through the casing shielding to obtain accurate formation resistivity information.

[0004] Although relevant research has explored in theory and methods, there are still deficiencies in the hardware implementation of the actual emission system and the optimization of the operating method. For example, existing research lacks practical solutions to key problems such as power improvement, waveform control, and system stability of the emission system, and it is difficult to meet the high-precision requirements of actual oil reservoir dynamic monitoring. Therefore, it is of great practical significance to develop a high-performance time-domain electromagnetic method resistivity detection instrument emission system and operating method suitable for cased wells. Summary of the Invention

[0005] The purpose of the present invention is to provide an effective method for detecting formation resistivity and evaluating the distribution of remaining oil in a metal cased well. By using a high-power pulse source to excite and observing the change of the magnetic induction electromotive force with time in the well, it solves the problems in the prior art such as small power supply current limited by the logging cable, limited detection depth, and difficulty in obtaining the resistivity distribution information of the reservoir within a certain distance from the wellbore, and then accurately evaluates the distribution of remaining oil in the oil reservoir.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: A transmitting system and operating method of a time-domain electromagnetic method resistivity detection instrument in a cased well according to the present invention includes:

[0007] S1: An upper joint kit and a lower joint kit, used for connecting with other instruments;

[0008] S2: Energy storage system, which adopts new energy storage materials and has high energy density and fast charge and discharge capabilities, providing stable energy supply for the emission system;

[0009] S3: Boost module, which includes a power supply circuit and a protection circuit. The power supply circuit is used to convert the ground DC high-voltage power supply into a low-voltage DC power supply for the circuit through common-mode filtering and isolated DC / DC conversion;

[0010] S4: MCU main control system, which is used to implement functions such as communication, ADC acquisition control, drive waveform generation, and drive circuit enabling / disabling;

[0011] S5: IGBT control unit, which includes a drive circuit, a power amplifier circuit, and a protection circuit. The drive circuit is used to drive and protect the power amplifier circuit, and the power amplifier circuit accepts the control of the drive circuit to drive the transmitting antenna.

[0012] Preferably, the low-voltage power supplies required by the emission system include +3.3V, +5V1, +5V2, +15V, and ±12V; among them, +3.3V is used for the MCU and its peripheral circuits, +5V1 is used for the isolated CAN bus, +5V2 is used for the high-voltage side ADC, +15V is used for the high-voltage section of the isolated drive circuit, and ±12V is used for the current signal circuit; the +5V2, +15V, and +12V power supplies share the same ground and are isolated from other power supplies, and the +3.3V and +5V1 are also isolated from each other.

[0013] Preferably, the MCU main control system includes 2 MCU circuits. MCU1 is responsible for ADC acquisition control, drive waveform generation, drive circuit enabling / disabling, data uploading, and data writing into the FIFO when there is a large amount of data. MCU2 is responsible for reading data from the FIFO and uploading it when there is a large amount of data; the MCU is connected to the communication circuit through a CAN interface. The drive waveform is output by two IO ports. The output waveform is set by instructions, and the time interval is set by an internal timer. Through the MCU program and the drive circuit, it is prevented that the two IO ports are simultaneously in the high state, and the enabling and disabling of the drive chip are controlled by one IO port.

[0014] Preferably, the drive circuit consists of the IO ports of the MCU, a logic circuit, and an isolated drive circuit. The logic circuit prevents the two IO ports from being simultaneously high according to the outputs of the two IO ports of the MCU, and the isolated drive circuit directly controls the switching of the IGBT module.

[0015] Preferably, the transmitting circuit of the power amplifier circuit adopts a full-bridge form. The withstand voltage of the power amplifier tubes in the H-type topology is greater than 1200V, and the working current is ≥100A; the body diode inside the IGBT forms a freewheeling circuit with the transmitting antenna, and an IGBT overvoltage protection circuit is also provided to reduce the IGBT switching stress and suppress high-frequency oscillation.

[0016] Preferably, the MCU master control system includes an integrated intelligent algorithm based on a fuzzy neural network, which real-time monitors parameters such as downhole temperature, pressure, and electromagnetic interference intensity, and automatically adjusts the frequency, amplitude, and duty cycle of the driving waveform according to preset rules and models to adapt to different downhole environments.

[0017] An operation method of a time-domain electromagnetic resistivity detection instrument in a cased well, which is applied to a transmitting system of a time-domain electromagnetic resistivity detection instrument in a cased well, includes the following steps:

[0018] S1: After the transmitting system instrument is powered on, the chip is reset and enters the initialization stage. After initialization is completed, the ADS1274 acquisition system is started.

[0019] S2: Wait for the transmitting data command. If the command arrives, enter the stage of uploading the first packet of data. If it does not arrive, continue to wait and judge whether 10 packets of data have been uploaded. If the upload is complete, start the transmitting timing sequence. SYNC generates a rising edge from low to high, AD is opened and enters a 3.3ms data setup time. After 5ms of the rising edge, a 1ms positive pulse is generated, and enter the loop mode. After a period of 1000ms, another 1ms pulse is generated to drive the IGBT module.

[0020] S3: The valid data of the transmitting system is established after 3.3ms. When DRDY changes from rising edge to falling edge, the AD data is valid. After 5ms, AD enters the reading, extraction, combination, and storage stage, and the time is 10ms.

[0021] S4: Judge whether the transmitting system has completed all data transmissions. If not, continue to wait. If it is completed, wait for the next cycle of data request command and perform a cycle.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. For the transmitting system and operation method of the time-domain electromagnetic resistivity detection instrument in a cased well of the present invention, a energy storage system using a new type of energy storage material is adopted. Compared with the traditional energy storage method, it improves the energy density, effectively reduces the system volume, and at the same time meets the energy requirements of the transmitting system for long-term and high-power operation underground, ensuring continuous and stable energy supply, and improving the working efficiency and reliability of the system.

[0024] 2. For the transmitting system and operation method of the time-domain electromagnetic resistivity detection instrument in a cased well of the present invention, the power supply circuit of the boost module is optimized in design, which can accurately convert the ground DC high-voltage power supply into a variety of stable low-voltage DC power supplies to provide reliable power support for each module; the protection circuit can quickly respond when abnormal situations such as overvoltage, overcurrent, and short circuit occur in the circuit, effectively protect the system safety, reduce the failure risk, and extend the service life of the equipment.

[0025] 3. For the transmitting system and operation method of the time-domain electromagnetic resistivity detection instrument in a cased well according to the present invention, the dual-MCU architecture of the MCU main control system has a clear division of labor and works in coordination, greatly improving the efficiency of data processing and control; the integrated intelligent algorithm can sense the changes in the downhole complex environment in real time and automatically adjust the driving waveform parameters, enabling the transmitting system to always be in the best working state and enhancing the adaptability and anti-interference ability of the system.

[0026] 4. For the transmitting system and operation method of the time-domain electromagnetic resistivity detection instrument in a cased well according to the present invention, the driving circuit of the IGBT control unit can respond quickly and accurately to the MCU instructions to control the switching action of the IGBT module; the power amplifier circuit can provide a powerful and stable power output to drive the transmitting antenna to generate high-quality electromagnetic signals; the precise overvoltage and overcurrent protection thresholds set by the protection circuit can quickly cut off the circuit in case of abnormal conditions to protect the IGBT module and the entire transmitting system, ensuring the stable operation of the system.

[0027] 5. For the transmitting system and operation method of the time-domain electromagnetic resistivity detection instrument in a cased well according to the present invention, the timing of data acquisition, processing, and transmission in the operation method is finely optimized to ensure that data can be efficiently and accurately acquired and transmitted within each working cycle; the stages of data establishment, reading, extraction, combination, and storage are closely connected, effectively improving the data processing efficiency and reducing the probability of data loss and errors, providing a reliable data basis for subsequent data analysis and reservoir evaluation.

[0028] 6. For the transmitting system and operation method of the time-domain electromagnetic resistivity detection instrument in a cased well according to the present invention, by setting a specific transmitting timing and cyclic mode and combining the intelligent adjustment of the driving waveform by the MCU main control system, precise control of the transmitted signal is achieved; this intelligent transmitting control strategy can flexibly adjust the transmitting parameters according to the actual downhole situation, improve the penetration ability and detection accuracy of the electromagnetic signal, and better meet the detection requirements under different reservoir conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] Figure 1 It is a schematic structural diagram of the receiving sub-coil system;

[0031] Figure 2 It is a schematic block diagram of the receiving circuit;

[0032] Figure 3 It is an operation method of the transmitting system of the time-domain electromagnetic resistivity detection instrument in a cased well. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] In order to make the technical means, creative features, achieved purposes and effects realized by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0034] Embodiment 1

[0035] As Figures 1 to 3 shown, for a resistivity detection instrument transmitting system and operating method in a cased well using time-domain electromagnetic method according to an embodiment of the present invention, power supply circuit: after the DC power supply bus enters the transmitting unit, one path is sent to the energy storage sub-section through the through line; the other path is sent to each DC / DC module after passing through the industrial-mode filter; a total of 5 low-voltage power supplies are required for the transmitting system, namely +3.3V, +5V1, +5V2, +15V and ±12V; among them, +3.3V is used for the MCU and its peripheral circuits, +5V1 is used for isolating the CAN bus, +5V2 is used for the high-voltage side ADC, +15V is used for the high-voltage section of the isolation drive circuit, and ±12V is used for the current signal circuit; among the five groups of power supplies, the +5V2, +15V and +12V power supplies share the same ground and need to be isolated from other power supplies, and +3.3V and +5V1 also need to be isolated.

[0036] Main control MCU system: The MCU circuit realizes functions such as communication, ADC acquisition control, driving waveform generation, enabling / disabling of the drive circuit, and data transmission; there are a total of 2 MCU circuits, among which MCU1 is responsible for ADC acquisition control, driving waveform generation, enabling / disabling of the drive circuit, data upload and data writing into the FIFO in case of large amounts of data, and MCU2 is responsible for reading data from the FIFO and uploading it in case of large amounts of data; the MCU is connected to the communication circuit through the CAN interface (C1TX and C1RX); the driving waveform is output by two IO ports, the output waveform is set by instructions, the time interval is set by the internal timer, and the two paths are prevented from being in the high state simultaneously by software protection implemented by the MCU program and hardware protection implemented by the drive circuit, and the enabling and disabling of the drive chip are controlled by one IO port; in some working conditions, when it is necessary to store and transmit a relatively large amount of data and the RAM capacity of the MCU itself cannot meet the requirements, a design is adopted with one FIFO and one MCU specifically responsible for data upload to meet the requirements of this working condition.

[0037] Drive circuit design: The drive circuit consists of the IO ports of the MCU, a logic circuit and an isolation drive circuit. Among them, specific drive waveforms are generated at two IO ports according to telemetry instructions; the input of the logic circuit is the output of the two IO ports of the MCU, and the situation where the two IO ports are simultaneously high (such as unstable states of the IO ports during MCU software and hardware failures or system power-on) is prevented through the logic circuit; the isolation drive circuit directly controls the switching of the IGBT module.

[0038] Power amplifier circuit design: The transmitting circuit adopts a full-bridge form. The working principle is that when two A switches on the diagonal are conducting, the two B switches on the other diagonal are cut off, and when the two B switches are conducting, the two A switches are cut off. When A and B are switched according to a certain time sequence, transient excitation of the transmitting antenna can be achieved; The power amplifier transistors (V1, V2, V5, V6) in the H-type topology should have a breakdown voltage greater than 1200V and a working current that should satisfy ≥100A. Considering the derating of the power amplifier transistors, they are selected according to the principle of maximum breakdown voltage and rated current under the same size conditions, and the turn-on and turn-off delay times are also taken into account; The body diode inside the IGBT is a fast-recovery diode, which forms a freewheeling circuit with the transmitting antenna; When the IGBT transistor is turned off, the freewheeling circuit can release the energy stored in the transmitting antenna to prevent the induced voltage from being too high and breaking down the IGBT. To reduce the IGBT switching stress and suppress high-frequency oscillation, an IGBT overvoltage protection circuit (snubber circuit) is designed; Due to the extremely large transient transmission power, the snubber circuit adopts the most traditional RC snubber circuit (such as C1, C2, C5, C6, R3, R4, etc. in the figure). This circuit has a significant effect on suppressing the turn-off surge voltage, and can suppress high spike voltages relative to the RCD-type snubber circuit and suppress the bus voltage oscillation relative to the C-type snubber circuit.

[0039] MCU main control system integrates intelligent algorithms: Temperature sensor: A PT100 platinum resistance temperature sensor is selected, with a measurement range of -40°C - 200°C and an accuracy of ±0.1°C; It is installed at a position near the heating element in the transmitting system, such as near the IGBT module, to accurately monitor the internal temperature change of the system;

[0040] Pressure sensor: A diffused silicon pressure sensor is adopted, with a measurement range of 0 - 100MPa and an accuracy of ±0.2% FS. It is installed on the outer shell of the transmitting system to be able to monitor the downhole pressure in real time;

[0041] Electromagnetic interference sensor: A Hall effect electromagnetic interference sensor is selected, with a measurement range of 0 - 100mT and an accuracy of ±0.5mT; It is installed near the transmitting antenna to monitor the surrounding electromagnetic interference intensity.

[0042] Fuzzy neural network algorithm model

[0043] Fuzzification processing: Fuzzify the three input variables of temperature, pressure, and electromagnetic interference intensity; Taking temperature as an example, it is divided into three fuzzy subsets: "low temperature" (0 - 30°C), "medium temperature" (30 - 100°C), and "high temperature" (100 - 200°C); Pressure and electromagnetic interference intensity are also similarly divided into different fuzzy subsets.

[0044] Neural network structure: A three-layer feedforward neural network is adopted. The input layer has 3 neurons, corresponding to temperature, pressure, and electromagnetic interference intensity respectively; the hidden layer has 10 neurons; the output layer has 3 neurons, corresponding to the adjustment amounts of the frequency, amplitude, and duty cycle of the driving waveform respectively.

[0045] Training process: A large amount of experimental data is used to train the neural network. These data include the optimal driving waveform parameters under different temperatures, pressures, and electromagnetic interference intensities; the training algorithm uses the BP (Back-Propagation) algorithm. By continuously adjusting the weights and thresholds of the neural network, the output of the network is made as close as possible to the actual optimal adjustment amount.

[0046] Adjustment strategy

[0047] Temperature adjustment strategy: When the temperature is in the "low temperature" range, the frequency of the driving waveform is appropriately increased to increase the signal emission speed, and the frequency adjustment range is ±10%; when the temperature is in the "medium temperature" range, the frequency, amplitude, and duty cycle are kept basically unchanged; when the temperature is in the "high temperature" range, the frequency of the driving waveform is decreased (up to 20% reduction), and at the same time the amplitude is appropriately decreased (up to 15% reduction) to reduce system heating.

[0048] Pressure adjustment strategy: When the pressure is low, the amplitude of the driving waveform is decreased (up to 10% reduction); when the pressure is high, the amplitude of the driving waveform is increased (up to 20% increase), and at the same time the duty cycle is appropriately adjusted (±5%) to ensure the signal penetration ability.

[0049] Electromagnetic interference adjustment strategy: When the electromagnetic interference intensity is low, the current driving waveform parameters are maintained; when the electromagnetic interference intensity is high, the amplitude of the driving waveform is increased (up to 30% increase), and the frequency is adjusted (±15%) to improve the signal anti-interference ability.

[0050] Response of the algorithm to changes in different environmental parameters during actual testing

[0051] Response to temperature change: In a test, the downhole temperature gradually increased from 25°C to 120°C; when the temperature reached 30°C, the algorithm began to slightly decrease the frequency of the driving waveform; when the temperature reached 100°C, the frequency decreased by 15% and the amplitude decreased by 10%. The system heating was significantly reduced, and at the same time the stability of the transmitted signal was basically maintained.

[0052] Response to pressure change: When the downhole pressure increased from 10 MPa to 80 MPa, the algorithm increased the amplitude of the driving waveform by 18% and the duty cycle by 3%. The transmitted signal can better penetrate the formation, and the detection effect is improved.

[0053] Electromagnetic interference variation response: In the test where the electromagnetic interference intensity increased from 10 mT to 80 mT, the algorithm increased the amplitude of the driving waveform by 25% and decreased the frequency by 12%; the transmitted signal can still be effectively received and recognized in a strong interference environment.

[0054] Operating method of the transmitting system: After the transmitting system instrument is powered on, the chip is reset; the system enters the initialization stage. After initialization is completed, the ADS1274 acquisition system is started and waits for the arrival of the transmission data request command. If it arrives, it enters the stage of uploading the first packet of data. If it does not arrive, it continues to wait. At this time, it is judged whether 10 packets of data have been uploaded. If they have been uploaded, then the transmission timing is started. SYNC generates a rising edge from low to high. At this time, AD has been opened and enters the data setup time of 3.3 ms. At the same time, 5 ms after this rising edge, a 1 ms positive pulse is generated and enters the loop mode. After a period of 1000 ms, another 1 ms pulse is generated. This pulse drives the IGBT module through the drive circuit; the valid data of the transmitting system is established after 3.3 ms. At this time, DRDY changes from a rising edge to a falling edge. At this time, the AD data is valid and can be retrieved. After 5 ms, AD officially enters the reading, extraction, combination, and storage, and the time is 10 ms; finally, it is judged whether the transmitting system has completed all data transmissions. If not, it continues to wait. If the transmission is completed, it continues to wait for the arrival of the next cycle data request command and cycles in this way.

[0055] The above front, back, left, right, up, and down are all based on Figure 1 the attached drawings of the specification. According to the standard of the observer's viewing angle, the side of the device facing the observer is defined as the front, and the left side of the observer is defined as the left, and so on.

[0056] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the protection scope of the present invention.

[0057] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A transmitting system of a time-domain electromagnetic resistivity detection instrument in a cased well, characterized in that, Comprising: S1: An upper joint kit and a lower joint kit for connecting to other instruments; S2: An energy storage system, using a new type of energy storage material, having a high energy density and fast charge and discharge capabilities, and providing a stable energy supply for the launch system; S3: A boost module, which includes a power supply circuit and a protection circuit. The power supply circuit is used to convert the ground DC high-voltage power supply into a low-voltage DC power supply for the circuit through an isolated DC / DC after common-mode filtering; S4: An MCU main control system for realizing functions such as communication, ADC acquisition control, driving waveform generation, and enabling / disabling of the driving circuit; S5: An IGBT control unit, including a driving circuit, a power amplifier circuit, and a protection circuit. The driving circuit is used to drive and protect the power amplifier circuit, and the power amplifier circuit accepts the control of the driving circuit to drive the transmitting antenna.

2. The transmitting system of a time-domain electromagnetic resistivity detection instrument in a cased well according to claim 1, wherein: The low-voltage power supplies required by the launch system include +3.3V, +5V1, +5V2, +15V, and ±12V; among them, +3.3V is used for the MCU and its peripheral circuits, +5V1 is used for the isolated CAN bus, +5V2 is used for the high-voltage side ADC, +15V is used for the high-voltage section of the isolated driving circuit, and ±12V is used for the current signal circuit; the +5V2, +15V, and +12V power supplies share the same ground and are isolated from other power supplies, and +3.3V and +5V1 are also isolated from each other.

3. The transmitting system of a time-domain electromagnetic resistivity detection instrument in a cased well according to claim 1, characterized in that: The MCU main control system contains 2 MCU circuits. MCU1 is responsible for ADC acquisition control, driving waveform generation, enabling / disabling of the driving circuit, data upload, and data writing into the FIFO when there is a large amount of data. MCU2 is responsible for reading data from the FIFO and uploading it when there is a large amount of data; the MCU is connected to the communication circuit through a CAN interface. The driving waveform is output by two IO ports. The output waveform is set by an instruction, and the time interval is set by an internal timer. Through the MCU program and the driving circuit, it is prevented that the two IO ports are simultaneously in a high state. The enabling and disabling of the driving chip are controlled by one IO port.

4. The transmitting system of a time-domain electromagnetic resistivity detection instrument in a cased well according to claim 1, characterized in that: The driving circuit consists of the IO ports of the MCU, a logic circuit, and an isolated driving circuit. The logic circuit prevents the two IO ports from being simultaneously high according to the outputs of the two IO ports of the MCU, and the isolated driving circuit directly controls the switching of the IGBT module.

5. The transmitting system of a time-domain electromagnetic resistivity detection instrument in a cased well according to claim 1, characterized in that: The transmitting loop of the power amplifier circuit adopts a full-bridge form. The voltage withstand of the power amplifier tubes in the H-type topology is greater than 1200V, and the working current ≥100A; the body diode inside the IGBT forms a freewheeling circuit with the transmitting antenna, and an IGBT overvoltage protection circuit for reducing the IGBT switching stress and suppressing high-frequency oscillation is also provided.

6. The transmitting system of a time-domain electromagnetic resistivity detection instrument in a cased well according to claim 1, characterized in that: The MCU main control system includes an integrated intelligent algorithm. This intelligent algorithm is based on a fuzzy neural network, and real-time monitors parameters such as the downhole temperature, pressure, and electromagnetic interference intensity, and automatically adjusts the frequency, amplitude, and duty cycle of the driving waveform according to preset rules and models to adapt to different downhole environments.

7. A method for operating a resistivity detection instrument using time-domain electromagnetic method in a cased well, which is applied to the transmitting system described in any one of claims 1-6, characterized in that, Including the following steps: S1: After the launch system instrument is powered on, the chip is reset and enters the initialization stage. After the initialization is completed, the ADS1274 acquisition system is started; S2: Wait for the command to request data. If the command arrives, enter the stage of uploading the first packet of data. If it doesn't arrive, continue to wait and determine whether 10 packets of data have been uploaded. If the upload is complete, start the transmission timing sequence. SYNC generates a rising edge from low to high, AD is turned on to enter the 3.3 ms data setup time. After 5 ms from the rising edge, a 1 ms positive pulse is generated, enter the cyclic mode, and after a period of 1000 ms, another 1 ms pulse is generated to drive the IGBT module. S3: The valid data of the transmission system is established after 3.3 ms. When DRDY changes from rising edge to falling edge, the AD data is valid. After 5 ms, AD enters the stages of reading, extracting, combining, and storing for 10 ms. S4: Determine whether the transmission system has completed all data transmissions. If not, continue to wait. If it has, wait for the next cycle's command to request data and perform a cycle loop.

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