While-drilling acoustic vibration signal acquisition power-saving method, device and system and storage medium

Abstract

The invention provides a while-drilling acoustic vibration signal acquisition power-saving method, device and system and a storage medium, and relates to the technical field of coal mine gas prevention and control. According to the invention, a low-power-consumption acceleration vibration sensor is introduced as a'sentry ', and only when strong vibration representing effective drilling operation is detected, a high-power-consumption acoustic emission sensor and a signal processing unit and storage unit circuit associated with the high-power-consumption acoustic emission sensor are awakened; meaningless power consumption in non-operation states such as device transportation, installation preparation and drill rod idling is avoided, so that the effective acquisition time of the device in a key operation period is greatly prolonged under the same battery capacity. According to the invention, intelligent screening of the acquisition time is realized, so that the system mainly acquires acoustic emission signals generated in an effective operation process that a drill bit cuts a coal body, acquisition of invalid background noise signals is reduced, and subsequent more accurate analysis and identification of tectonic coal characteristics are facilitated.

Description

Technical Field

[0001] This invention relates to the field of coal mine gas control technology, specifically to a power-saving method, device, system, and storage medium for acquiring acoustic vibration signals while drilling. Background Technology

[0002] In the field of mine gas control, accurate identification of tectonic coal is crucial for predicting and preventing coal and gas outbursts. Acoustic emission technology, as an effective means of monitoring coal fracture, has been widely used in laboratory research. By monitoring the high-frequency elastic waves (acoustic emission signals) generated by the coal body during stress, its fracture mechanism and stress state can be analyzed.

[0003] Because the laboratory has a continuous power supply, continuous acoustic emission (AE) acquisition does not pose a problem of high power consumption. However, applying AE technology to the near-drill bit environment in wells for real-time monitoring while drilling faces significant challenges. Downhole AE acquisition devices are typically powered by battery packs, which have limited power. AE sensors are extremely sensitive to high-frequency vibrations; even in non-operational states (such as during equipment transportation, installation preparation, or drill pipe idling), any minute environmental vibration can trigger continuous signal acquisition by the AE sensors. This "ineffective acquisition" continuously consumes battery power, severely shortening the effective operating time of the device during critical drilling operations, and hindering the practical application and promotion of AE technology for identifying tectonic coal formations while drilling.

[0004] Therefore, there is an urgent need for a power-saving method, device, system, and storage medium tailored to the characteristics of the downhole drilling environment in order to extend the effective operating time of acoustic emission acquisition devices. Summary of the Invention

[0005] This invention provides a power-saving method, device, system, and storage medium for acquiring acoustic emission signals while drilling, which can intelligently determine the operating status and supply power as needed, solving the technical problems of battery power waste and short effective working time caused by ineffective acquisition in existing downhole acoustic emission acquisition devices.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A power-saving method for acquiring acoustic vibration signals while drilling, the method comprising: An acceleration vibration sensor is configured for the acoustic emission acquisition device while drilling, and a vibration threshold is set. This vibration threshold is configured to distinguish between the working state and the non-working state of the drill pipe rotating to cut the coal body. Continuously monitor the vibration values ​​output by the acceleration vibration sensor; When the vibration value does not exceed the vibration threshold, the control battery pack only supplies power to the acceleration vibration sensor and puts the acoustic emission sensor and its associated signal processing and storage units into a non-working state. When the vibration value exceeds the vibration threshold, the control battery pack supplies power to the acoustic emission sensor and its associated signal processing and storage units to initiate the acquisition and processing of acoustic emission signals.

[0007] Furthermore, when the vibration value drops from exceeding the vibration threshold to below the vibration threshold again, the control battery pack stops supplying power to the acoustic emission sensor and its associated signal processing and storage units, causing it to return to a non-operating state.

[0008] Furthermore, the method for setting the vibration threshold includes: The acoustic emission acquisition device is placed inside the drill pipe and continuously supplies power to the acceleration vibration sensor, the acoustic emission sensor, and their associated signal processing and storage units. The test examined whether acoustic emission signals could be collected during the operation of the drill pipe rotating to cut the coal body under different candidate thresholds, and whether acoustic emission signals could be collected during the non-operation state. A value is selected from the candidate thresholds as the vibration threshold, which satisfies the following conditions: the maximum threshold at which acoustic emission signals can be collected when the drill pipe is rotating and cutting the coal body; and at this maximum threshold, acoustic emission signals cannot be collected in the non-operation state.

[0009] A power-saving device for acquiring acoustic vibration signals while drilling, used to implement the above method, the device comprising: Battery pack; An accelerometer vibration sensor is used to monitor vibration and output vibration values. Acoustic emission sensor, used to collect acoustic emission signals; The circuit board integrates signal processing and storage units. The control unit is electrically connected to the acceleration vibration sensor, the battery pack, the acoustic emission sensor, and the circuit board, respectively. The control unit is configured to: receive the vibration value, compare it with a preset vibration threshold, and control the power supply path of the battery pack to the acoustic emission sensor and the circuit board based on the comparison result.

[0010] Furthermore, the control unit controls the power supply path by controlling the on / off state of a switching device.

[0011] Furthermore, the circuit board is also provided with a data interface for connecting external devices to read data from the storage unit.

[0012] Furthermore, the signal processing unit is used to process the acoustic emission signal collected by the acoustic emission sensor to obtain acoustic emission characteristic parameters, wherein the acoustic emission characteristic parameters include at least one of amplitude, energy, average signal level value and effective voltage value.

[0013] Furthermore, the device is configured to be placed inside the drill pipe.

[0014] A drilling acoustic emission acquisition system includes a drill pipe and the aforementioned drilling acoustic vibration signal acquisition power-saving device, wherein the device is placed inside the drill pipe.

[0015] A computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the above-described method.

[0016] The beneficial technical effects of this invention are: 1. This invention introduces a low-power acceleration vibration sensor as a "sentinel," which only activates the high-power acoustic emission sensor and its associated signal processing and storage unit circuits when strong vibrations representing effective drilling operations are detected. This avoids unnecessary power consumption during non-operational states such as device transportation, installation preparation, and drill pipe idling, thereby significantly extending the effective data acquisition time of the device during critical operating periods with the same battery capacity.

[0017] 2. This invention enables intelligent selection of acquisition timing, allowing the system to primarily acquire acoustic emission signals generated during the effective operation of the drill bit cutting the coal body, reducing the acquisition of invalid background noise signals, which is beneficial for more accurate analysis and identification of the structural coal characteristics in the future.

[0018] 3. This invention is designed to address the characteristics of high vibration intensity and strong intermittency in downhole drilling operations. The threshold setting method takes into account actual working conditions, making it more environmentally adaptable and practical. It provides reliable hardware support for the practical application of downhole acoustic emission identification of tectonic coal technology. Attached Figure Description

[0019] Figure 1 This is a flowchart illustrating the principle of the energy-saving method for acquiring acoustic and vibration signals while drilling, as described in an embodiment of the present invention. Figure 2 This is a block diagram of the circuit components for acquiring, processing, storing, and retrieving acoustic and vibration data while drilling, according to an embodiment of the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. Certain embodiments of the invention will be described more fully below with reference to the accompanying drawings, and some, but not all, of these embodiments will be shown. In fact, various embodiments of the invention can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to enable the invention to meet applicable legal requirements.

[0021] In the description of this invention, it should be noted that the terms "inner," "outer," "upper," "lower," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] This embodiment is based on the actual situation of a coal mine and refers to... Figure 1 , 2 As shown, a power-saving method, device, system, and storage medium for acquiring acoustic vibration signals while drilling are provided.

[0023] A power-saving method for acquiring acoustic vibration signals while drilling includes: S1. An acceleration vibration sensor is configured for the acoustic emission acquisition device while drilling, and a vibration threshold is set. The vibration threshold is configured to distinguish between the working state and the non-working state of the drill pipe rotating to cut the coal body.

[0024] S2. After the drilling acoustic emission acquisition device is powered on and initialized, the acceleration vibration sensor starts working and continuously monitors the vibration value. The control unit (which can be an independent MCU or a logic circuit) continuously monitors the vibration value output by the acceleration vibration sensor.

[0025] S3. The control unit determines whether the vibration value output by the acceleration vibration sensor exceeds the vibration threshold: When the vibration value does not exceed the vibration threshold, the system maintains "sleep mode", controls the battery pack to supply power only to the acceleration vibration sensor, and puts the acoustic emission sensor and its associated signal processing unit and storage unit into a non-working state (sleep or power-off state). When the vibration value exceeds the vibration threshold, the control unit immediately triggers the power supply switch to control the battery pack to supply power to the acoustic emission sensor and its associated signal processing and storage units. The system then enters "working mode" to start the acquisition and processing of acoustic emission signals.

[0026] S4. When the vibration value drops from exceeding the vibration threshold to below the vibration threshold again, the control battery pack stops supplying power to the acoustic emission sensor and its associated signal processing and storage units, causing it to return to a non-working state. The system returns to "sleep mode" and waits for the next effective vibration trigger.

[0027] Under laboratory or field conditions, the vibration threshold can be set using the following method: The acoustic emission acquisition device is placed inside the drill pipe and continuously supplies power to the acceleration vibration sensor, the acoustic emission sensor, and their associated signal processing and storage units. The test examined whether acoustic emission signals could be collected during the operation of the drill pipe rotating to cut the coal body under different candidate thresholds, and whether acoustic emission signals could be collected during the non-operation state. A value is selected from the candidate thresholds as the vibration threshold, which satisfies the following conditions: the maximum threshold at which acoustic emission signals can be collected when the drill pipe is rotating and cutting the coal body; and at this maximum threshold, acoustic emission signals cannot be collected in the non-operation state.

[0028] A power-saving device for acquiring acoustic vibration signals while drilling is disclosed. The device is configured to be placed inside the drill pipe. The device is used to implement the method described in this embodiment and includes a battery pack, an acceleration vibration sensor, an acoustic emission sensor, a circuit board, and a control unit.

[0029] The battery pack provides power to the entire device, and its output is controlled by the control unit; the acceleration vibration sensor monitors vibration and outputs vibration values; the acoustic emission sensor collects acoustic emission signals; the circuit board integrates a signal processing unit and a storage unit; the control unit is electrically connected to the acceleration vibration sensor, the battery pack, the acoustic emission sensor, and the circuit board.

[0030] The control unit is configured to receive vibration values ​​and compare them with preset vibration thresholds. Based on the comparison results, it controls the power supply path from the battery pack to the acoustic emission sensor and the circuit board. Specifically, the control unit controls the power supply path by controlling the on / off state of a switching device (such as a MOSFET or relay), thereby controlling the power flow to the acoustic emission sensor, signal processing unit (which may include amplification, filtering, analog-to-digital conversion circuits, etc.), and storage unit (such as a Flash chip).

[0031] The circuit board is also equipped with a data interface for connecting to external devices (data analyzers) to read and analyze data in the storage unit.

[0032] The signal processing unit processes the acoustic emission signals acquired by the acoustic emission sensor to obtain acoustic emission characteristic parameters. These parameters include at least one of the following: amplitude, energy, average signal level, and effective voltage. The acoustic emission characteristic parameters are stored in a storage unit for subsequent analysis of the coal body structure.

[0033] A drilling acoustic emission acquisition system includes a drill pipe and a drilling acoustic vibration signal acquisition power-saving device as described in this embodiment, the device being placed inside the drill pipe.

[0034] A computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the method described in this embodiment.

[0035] The computer-readable storage medium can be an internal storage unit of any device or apparatus with data processing capabilities, such as a hard disk or memory, or an external storage device of any device with data processing capabilities, such as a plug-in hard disk, smart media card (SMC), SD card, flash card, etc.

[0036] The present invention has been described in detail above with reference to the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the energy-saving method, device, system, and storage medium for acquiring acoustic vibration signals while drilling according to the present invention. The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A power-saving method for acquiring acoustic vibration signals while drilling, characterized in that, The method includes: An acceleration vibration sensor is configured for the acoustic emission acquisition device while drilling, and a vibration threshold is set. This vibration threshold is configured to distinguish between the working state and the non-working state of the drill pipe rotating to cut the coal body. Continuously monitor the vibration values ​​output by the acceleration vibration sensor; When the vibration value does not exceed the vibration threshold, the control battery pack only supplies power to the acceleration vibration sensor and puts the acoustic emission sensor and its associated signal processing and storage units into a non-working state. When the vibration value exceeds the vibration threshold, the control battery pack supplies power to the acoustic emission sensor and its associated signal processing and storage units to initiate the acquisition and processing of acoustic emission signals.

2. The energy-saving method for acquiring acoustic vibration signals while drilling according to claim 1, characterized in that, When the vibration value drops from exceeding the vibration threshold to below the vibration threshold again, the control battery pack stops supplying power to the acoustic emission sensor and its associated signal processing and storage units, causing it to return to a non-operating state.

3. A power-saving method for acquiring acoustic vibration signals while drilling, as described in claim 1 or 2, characterized in that, The method for setting the vibration threshold includes: The acoustic emission acquisition device is placed inside the drill pipe and continuously supplies power to the acceleration vibration sensor, the acoustic emission sensor, and their associated signal processing and storage units. The test examined whether acoustic emission signals could be collected during the operation of the drill pipe rotating to cut the coal body under different candidate thresholds, and whether acoustic emission signals could be collected during the non-operation state. A value is selected from the candidate thresholds as the vibration threshold, which satisfies the following conditions: the maximum threshold at which acoustic emission signals can be collected when the drill pipe is rotating and cutting the coal body; and at this maximum threshold, acoustic emission signals cannot be collected in the non-operation state.

4. A power-saving device for acquiring acoustic and vibration signals while drilling, characterized in that, The apparatus for implementing the method as described in any one of claims 1-3 includes: Battery pack; An accelerometer vibration sensor is used to monitor vibration and output vibration values. Acoustic emission sensor, used to collect acoustic emission signals; The circuit board integrates signal processing and storage units. The control unit is electrically connected to the acceleration vibration sensor, the battery pack, the acoustic emission sensor, and the circuit board, respectively. The control unit is configured to: receive the vibration value, compare it with a preset vibration threshold, and control the power supply path of the battery pack to the acoustic emission sensor and the circuit board based on the comparison result.

5. The energy-saving device for acquiring acoustic vibration signals while drilling according to claim 4, characterized in that, The control unit controls the power supply path by controlling the on / off state of a switching device.

6. The energy-saving device for acquiring acoustic vibration signals while drilling according to claim 4, characterized in that, The circuit board is also equipped with a data interface for connecting to external devices to read data from the storage unit.

7. The energy-saving device for acquiring acoustic vibration signals while drilling according to claim 4, characterized in that, The signal processing unit is used to process the acoustic emission signal collected by the acoustic emission sensor to obtain acoustic emission characteristic parameters. The acoustic emission characteristic parameters include at least one of amplitude, energy, average signal level, and effective voltage.

8. The energy-saving device for acquiring acoustic vibration signals while drilling according to claim 4, characterized in that, The device is configured to be placed inside the drill pipe.

9. A drilling acoustic emission acquisition system, characterized in that, It includes a drill pipe and a power-saving device for acquiring acoustic and vibration signals while drilling, as described in any one of claims 4-8, wherein the device is placed inside the drill pipe.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method as described in any one of claims 1-3.

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