A data communication and power supply control device for a pulsed neutron logging instrument

Abstract

The utility model discloses a data communication and power supply control device for pulse neutron logging instrument mainly relates to the field of electronic information. Including pulse neutron logging instrument, winch controller, acquisition computer still include precision numerical control adjustable power supply, power unit, 485 communication unit a, microcontroller unit, 485 communication isolator, USB turns 485 communication unit, 485 communication unit b, encoding disc processing unit. The utility model has the advantages of high integration, stable power supply, flexible control, strong real -time, can effectively promote the reliability and work efficiency of pulse neutron logging instrument, thereby can be well applicable to the data communication and power supply of pulse neutron logging instrument.

Description

Technical Field

[0001] This utility model relates to the field of electronic information, specifically a data communication and power supply control device for a pulsed neutron logging tool. Background Technology

[0002] Pulsed neutron logging utilizes a neutron generator to emit 14 MeV high-energy pulsed neutrons downhole and detects the gamma rays, fast neutrons, or thermal neutrons produced after the neutrons interact with the formation material, thereby inferring the minerals and their content in the formation. Pulsed neutron logging technology has the advantages of in-situ direct measurement, rich detection information, and adaptability to complex geological environments, and has become one of the important methods in the field of modern nuclear logging. The pulsed neutron logging tool is lowered into the formation borehole along with the logging winch cable. The winch controller controls the movement of the logging tool downhole, and the tool collects data in real time at different depth points, transmitting the data to a surface data acquisition computer.

[0003] The pulsed neutron logging tool contains components such as a neutron generator, detector, and microcontroller, which require a stable and reliable power supply from the ground. Due to varying drilling depths, the power supply to the logging tool is affected by cable length, placing stringent requirements on the performance and reliability of the power supply system.

[0004] Traditional logging systems operate independently in terms of winch control, power supply control, and logging tool communication, with each component using different communication interfaces. For example, winch control uses TTL level communication, power supply uses RS232 level communication, and the logging tool uses RS485 communication. This leads to limitations when multiple modules work together, resulting in issues such as low integration, poor communication, and inaccurate control. Furthermore, existing winch controllers update depth data only once per second, resulting in slow data updates and poor real-time performance, leading to data errors even at high logging speeds. Utility Model Content

[0005] The purpose of this invention is to provide a data communication and power supply control device for pulsed neutron logging tools. It has high integration, stable power supply, flexible control, and strong real-time performance, which can effectively improve the reliability and working efficiency of pulsed neutron logging tools, and is therefore well-suited for data communication and power supply of pulsed neutron logging tools.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] A data communication and power supply control device for a pulsed neutron logging tool includes a pulsed neutron logging tool, a winch controller, and a data acquisition computer. It also includes a precision numerically controlled adjustable power supply, a power supply unit, a 485 communication unit a, a microcontroller unit, a 485 communication isolator, a USB-to-485 communication unit, a 485 communication unit b, and an encoder disk processing unit; wherein:

[0008] The precision numerical control adjustable power supply and power supply unit are respectively connected to 220V / 50Hz AC power;

[0009] The precision numerical control adjustable power supply and the 485 communication isolator are respectively connected to the pulse neutron logging tool;

[0010] The power supply unit is connected to the microcontroller unit;

[0011] The 485 communication unit a is connected to the microcontroller unit and the precision numerical control adjustable power supply respectively;

[0012] The USB to 485 communication unit is connected to the microcontroller unit, the 485 communication isolator, and the data acquisition computer, respectively.

[0013] The 485 communication unit b is connected to the microcontroller unit and the winch controller, respectively.

[0014] The encoder disk processing unit is connected to the microcontroller unit and the winch controller, respectively.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This patent integrates winch data communication, logging instrument data communication, and power supply control communication into one, and communicates with the acquisition computer through a USB to 485 communication unit. It realizes the integrated communication of multiple modules with a single USB interface, which simplifies the communication interface of the logging system, resulting in higher integration, smoother communication, and more precise control. At the same time, the encoder processing unit can acquire the signal of the winch controller encoder and calculate the depth data of the logging instrument in real time, which improves the speed of depth data update and makes the data update more real-time.

[0017] 2. The logging tool returns power supply voltage and current data to the microcontroller unit in real time. After collection and analysis, the microcontroller unit controls the output voltage and current of the precision numerical control adjustable power supply in real time, ensuring that the logging tool has a stable power supply voltage and current at different logging depths, effectively improving the reliability and working efficiency of the pulse neutron logging tool. Attached Figure Description

[0018] Appendix Figure 1 This is a schematic diagram of the working principle of this utility model.

[0019] The following are the labels in the attached diagram: 1. Pulsed neutron logging tool; 2. Winch controller; 3. Acquisition computer; 4. Precision numerical control adjustable power supply; 5. Power supply unit; 6. 485 communication unit a; 7. Microcontroller unit; 8. 485 communication isolator; 9. USB to 485 communication unit; 10. 485 communication unit b; 11. Encoder disk processing unit. Detailed Implementation

[0020] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0021] Example: A data communication and power supply control device for a pulsed neutron logging tool, comprising a pulsed neutron logging tool 1, a winch controller 2, a data acquisition computer 3, and further comprising a precision numerically controlled adjustable power supply 4, a power supply unit 5, a 485 communication unit a6, a microcontroller unit 7, a 485 communication isolator 8, a USB-to-485 communication unit 9, a 485 communication unit b10, and an encoder disk processing unit 11; wherein:

[0022] The precision numerical control adjustable power supply 4 and the power supply unit 5 are respectively connected to 220V / 50Hz AC power.

[0023] The precision numerical control adjustable power supply 4 and the 485 communication isolator 8 are respectively connected to the pulse neutron logging instrument 1;

[0024] The power supply unit 5 is connected to the microcontroller unit 7;

[0025] The 485 communication unit a6 is connected to the microcontroller unit 7 and the precision numerical control adjustable power supply 4 respectively;

[0026] The USB to 485 communication unit 9 is connected to the microcontroller unit 7, the 485 communication isolator 8, and the data acquisition computer 3, respectively.

[0027] The 485 communication unit b10 is connected to the microcontroller unit 7 and the winch controller 2 respectively;

[0028] The encoder disk processing unit 11 is connected to the microcontroller unit 7 and the winch controller 2, respectively.

[0029] The precision numerical control adjustable power supply 4 is used to power the pulse neutron logging tool 1. It can communicate via a 485 bus to control the output voltage and current. The output voltage range is adjustable from 0 to +300V, and the output current range is adjustable from 0 to 1A. The model number is HSPY-300-01.

[0030] The microcontroller unit 7 receives the real-time power supply voltage and current values ​​returned by the pulsed neutron logging tool 1, analyzes them, and controls the precision numerically controlled adjustable power supply 4 to output appropriate voltage and current, ensuring a stable power supply voltage and current for the pulsed neutron logging tool 1. The microcontroller unit 7 also transmits the output voltage and current values ​​of the pulsed neutron logging tool 1 and the precision numerically controlled adjustable power supply 4 to the acquisition computer 3. Furthermore, the microcontroller unit 7 acquires data from the encoder disk processing unit 11 of the winch controller 2 and transmits the real-time depth value to the acquisition computer 3. The chip model of the microcontroller unit 7 is STM32F103C8T6, but it can also be a CPU, MCU, DSP, or FPGA device.

[0031] The power supply unit 5 is used to convert the 220V / 50Hz mains power into the voltage required by the microcontroller unit 7. The output voltage is +5V and the output current is 0.6A. The model number is LD03-10B05R2.

[0032] The 485 communication unit a6 and 485 communication unit b10 are used to convert the 485 communication signal into a TTL signal that matches the microcontroller unit 7, so as to realize the communication between the microcontroller unit 7 and other units. The model is MAX485CSA.

[0033] USB to 485 communication unit 9 is used to convert USB communication signals into 485 communication signals and TTL signals to realize data communication between acquisition computer 3, microcontroller unit 7, and pulse neutron logging instrument 1.

[0034] The 485 communication isolator 8 is used to optically isolate the 485 signal between the pulse neutron logging tool 1 and the USB to 485 communication unit 9, provide electrical data isolation of 2500 V rms for 1 minute, and have a high common-mode transient immunity of more than 25 kV / μs. It isolates the interference of the 485 signal transmitted from the underground logging tool, ensuring the accuracy and stability of the data communication of the pulse neutron logging tool 1.

[0035] This patent integrates winch data communication, logging tool data communication, and power supply control communication, achieving integrated communication across multiple modules. This simplifies the communication interface of the pulsed neutron logging system. Simultaneously, it can acquire signals from the encoder processing unit 11 of the winch controller 2, calculating the logging tool's depth data in real time and improving the depth data update rate. The microcontroller unit 7 controls the output voltage and current of the precision numerically controlled adjustable power supply 4, ensuring stable power supply voltage and current for the logging tool at different logging depths, thus enhancing the reliability and efficiency of the pulsed neutron logging tool.

[0036] This device features high integration, convenient operation and control, and strong practicality, making it well-suited for pulsed neutron logging tools.

Claims

1. A data communication and power supply control device for a pulsed neutron logging tool, comprising a pulsed neutron logging tool (1), a winch controller (2), and a data acquisition computer (3), characterized in that: It also includes a precision numerically controlled adjustable power supply (4), a power supply unit (5), a 485 communication unit a (6), a microcontroller unit (7), a 485 communication isolator (8), a USB to 485 communication unit (9), a 485 communication unit b (10), and an encoder disk processing unit (11); wherein: The precision numerical control adjustable power supply (4) and the power supply unit (5) are respectively connected to 220V / 50Hz AC power; The precision numerical control adjustable power supply (4) and the 485 communication isolator (8) are respectively connected to the pulse neutron logging instrument (1). The power supply unit (5) is connected to the microcontroller unit (7); The 485 communication unit a (6) is connected to the microcontroller unit (7) and the precision numerical control adjustable power supply (4) respectively; The USB to 485 communication unit (9) is connected to the microcontroller unit (7), the 485 communication isolator (8), and the data acquisition computer (3) respectively; The 485 communication unit b (10) is connected to the microcontroller unit (7) and the winch controller (2) respectively; The encoder disk processing unit (11) is connected to the microcontroller unit (7) and the winch controller (2) respectively.

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