Driving device and logging instrument

Abstract

The utility model discloses a driving device and a logging instrument, the input end of the driving device is connected with a power generation device, the output end of the driving device is connected with a load circuit, the driving device comprises a first path, the first end of the first path is connected with the input end of the driving device, and the second end of the first path is connected with the output end of the driving device; the first end of the second path is connected with the input end of the driving device, and the second end is connected with the output end of the driving device; the first end of the driving circuit is connected with the output end of the driving device, the second end of the driving circuit is connected with the third end of the second access, and the driving circuit is used for disconnecting the second access when the voltage of the input end of the driving device is smaller than a preset voltage threshold to enable the power generation device to supply power to the load circuit through the first access; and when the voltage at the input end of the driving device is greater than the preset voltage threshold, the second path is switched on, so that the power generation device supplies power to the load circuit through the second path. The system has the characteristics of strong anti-interference capability, good stability, convenient debugging and the like, and is suitable for underground high temperature, complex environment and the like.

Description

Technical Field

[0001] The utility model relates to the field of oil exploration logging, in particular to a driving device and a logging tool. Background Art

[0002] With the development of high-temperature directional probe logging technology, a reliable power supply driving system is required to ensure the stable and efficient operation of equipment. Since high-temperature directional probe logging instruments need to undertake the tasks of rectifying the electric energy generated by generators and supplying power to other instruments secondly. The reliability of the load driving ability of relevant high-temperature directional probe logging instruments cannot meet the requirements. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems in the related art to some extent. For this purpose, an object of the utility model is to provide a driving device, which has the characteristics of strong anti-interference ability, good stability and convenient debugging, and is suitable for the characteristics of high temperature and complex environment underground.

[0004] A second object of the utility model is to provide a logging tool.

[0005] To achieve the above object, an embodiment of the first aspect of the utility model provides a driving device. The input end of the driving device is connected to a power generation device, and the output end of the driving device is connected to a load circuit. The driving device includes: a first path, the first end of the first path is connected to the input end of the driving device, and the second end of the first path is connected to the output end of the driving device; a second path, the first end of the second path is connected to the input end of the driving device, and the second end of the second path is connected to the output end of the driving device; a driving circuit, the first end of the driving circuit is connected to the output end of the driving device, and the second end of the driving circuit is connected to the third end of the second path, and is used for disconnecting the second path when the voltage at the input end of the driving device is less than a preset voltage threshold, so that the power generation device supplies power to the load circuit through the first path; and when the voltage at the input end of the driving device is greater than the preset voltage threshold, conducting the second path, so that the power generation device supplies power to the load circuit through the second path.

[0006] According to the driving device of the embodiment of the present utility model, by using a driving circuit, when the input voltage of the load circuit is less than a preset voltage threshold, the second path is disconnected, and the power generation device slowly charges the load circuit through the first path, preventing the capacitor in the load circuit from being broken down due to overcurrent; when the input voltage of the load circuit is greater than the preset voltage threshold, that is, after the capacitor in the load circuit is charged, the second path is turned on, and the power generation device supplies power to the load circuit through the second path to drive the load circuit to work. The driving device of the embodiment of the present utility model has the characteristics of strong anti-interference ability, good stability, convenient debugging, etc., and is suitable for high temperature underground, complex environment, etc.

[0007] In addition, the driving device proposed according to the above embodiment of the present utility model may further have the following additional technical features:

[0008] According to an embodiment of the present utility model, the first path includes a first resistor, a first end of the first resistor is connected to a first end of the first path, and a first end of the first resistor is connected to a second end of the first path.

[0009] According to an embodiment of the present utility model, the second path includes a PMOS transistor, a source electrode of the PMOS transistor is connected to a first end of the second path, a drain electrode of the PMOS transistor is connected to a second end of the second path, and a gate electrode of the PMOS transistor is connected to a third end of the second path.

[0010] According to an embodiment of the present utility model, the driving circuit includes a voltage dividing sub-circuit and a driving sub-circuit, a first end of the voltage dividing sub-circuit is connected to a first end of the driving circuit, a second end of the voltage dividing sub-circuit is grounded, a third end of the voltage dividing sub-circuit is connected to a first end of the driving sub-circuit, and a second end of the driving sub-circuit is connected to a second end of the driving circuit.

[0011] According to an embodiment of the present utility model, the driving sub-circuit includes: an MCU chip, an NMOS transistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, and a first capacitor. The input end of the MCU chip is connected to the first end of the driving sub-circuit, the output end of the MCU chip is connected to the gate of the NMOS transistor through the fourth resistor, the source of the NMOS transistor is grounded, the drain of the NMOS transistor is connected to the first end of the third resistor, the second end of the third resistor is connected to the second end of the driving sub-circuit, the second end of the third resistor is connected to the source of the PMOS transistor through the second resistor, the first end of the fifth resistor is connected to the gate of the NMOS transistor, the second end of the fifth resistor is grounded, the first end of the first capacitor is connected to the gate of the NMOS transistor, and the second end of the first capacitor is grounded; the MCU chip is configured to: when the divided voltage input at the input end of the MCU chip is less than a preset value, output a low level to turn off the NMOS transistor to disconnect the second path; when the divided voltage input at the input end of the MCU chip is greater than the preset value, output a high level to turn on the NMOS transistor to connect the second path.

[0012] According to an embodiment of the present utility model, the voltage dividing sub-circuit includes a sixth resistor and a seventh resistor. The first end of the sixth resistor is connected to the first end of the voltage dividing sub-circuit, the second end of the sixth resistor is connected to the first end of the seventh resistor, the second end of the seventh resistor is connected to the second end of the voltage dividing sub-circuit, and the second end of the sixth resistor is connected to the third end of the voltage dividing sub-circuit.

[0013] According to an embodiment of the present utility model, a diode is provided between the output end of the driving device and the load circuit. The positive electrode of the diode is connected to the output end of the driving device, and the negative electrode of the diode is connected to the load circuit.

[0014] According to an embodiment of the present utility model, the power generation device is a generator.

[0015] According to an embodiment of the present utility model, at least one capacitor is provided in the load circuit.

[0016] To achieve the above object, an embodiment of the second aspect of the present utility model provides a logging tool, which includes a power generation device and a driving device as proposed in the embodiment of the first aspect of the present utility model. The power generation device is connected to the load circuit through the driving device.

[0017] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Description of the Drawings

[0018] Figure 1 is the schematic diagram of the driving device according to an embodiment of the present utility model;

[0019] Figure 2 is the circuit diagram of the driving device according to a specific embodiment of the present utility model;

[0020] Figure 3 is the schematic diagram of the logging tool according to an embodiment of the present utility model.

[0021] Label description: Q1: PMOS transistor, Q2: NMOS transistor, R1: first resistor, R2: second resistor, R3: third resistor, R4: fourth resistor, R5: fifth resistor, R6: sixth resistor, R7: seventh resistor, D1: diode. Detailed implementation manners

[0022] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model, but should not be construed as limiting the present utility model.

[0023] The driving device and the logging tool according to the embodiments of the present utility model will be described in detail below with reference to the accompanying drawings of the specification and the specific implementation manners.

[0024] Figure 1 is the schematic diagram of the driving device according to an embodiment of the present utility model. As Figure 1 shown, the input end of the driving device is connected to the power generation device, the output end of the driving device is connected to the load circuit, and the driving device includes:

[0025] The first path, the first end of the first path is connected to the input end of the driving device, and the second end of the first path is connected to the output end of the driving device;

[0026] The second path, the first end of the second path is connected to the input end of the driving device, and the second end of the second path is connected to the output end of the driving device;

[0027] The driving circuit, the first end of the driving circuit is connected to the output end of the driving device, and the second end of the driving circuit is connected to the third end of the second path, and is used to disconnect the second path when the voltage at the input end of the driving device is less than the preset voltage threshold, so that the power generation device supplies power to the load circuit through the first path; when the voltage at the input end of the driving device is greater than the preset voltage threshold, the second path is turned on, so that the power generation device supplies power to the load circuit through the second path.

[0028] In an embodiment of the present utility model, at least one capacitor is provided in the load circuit.

[0029] Since the load connected to the high-temperature directional probe logging instrument may have a large input capacitance, the high-temperature directional probe logging instrument needs to output a very high current instantaneously when powering downwards, threatening the safety of the system.

[0030] To ensure the safe and reliable power supply of the high-temperature directional probe logging instrument downwards, the driving device of the embodiment of the present invention is provided with two paths, namely the first path and the second path. The driving circuit is used to judge whether the input voltage of the load circuit is less than a preset voltage threshold. When the input voltage of the load circuit is less than the preset voltage threshold, the second path is disconnected, and the power generation device charges the load circuit slowly through the first path, preventing the capacitor in the load circuit from being broken down due to overcurrent. When the input voltage of the load circuit is greater than the preset voltage threshold, that is, after the capacitor in the load circuit is charged, the second path is turned on, and the power generation device supplies power to the load circuit through the second path to drive the load circuit to work.

[0031] In an embodiment of the present invention, the first path includes a first resistor R1. The first end of the first resistor R1 is connected to the first end of the first path, and the first end of the first resistor R1 is connected to the second end of the first path.

[0032] Specifically, a resistor (the first resistor R1) is provided on the first path. When the input voltage of the load circuit is less than the preset voltage threshold, the current provided by the power generation device is supplied to the load circuit after passing through the first resistor R1. The first resistor R1 plays a current-limiting role, enabling the capacitor in the load circuit to be charged slowly and preventing the load circuit from experiencing an overcurrent phenomenon and breaking down the capacitor in the load circuit.

[0033] In an embodiment of the present invention, the second path includes a PMOS transistor Q1. The source electrode of the PMOS transistor Q1 is connected to the first end of the second path, the drain electrode of the PMOS transistor Q1 is connected to the second end of the second path, and the gate electrode of the PMOS transistor Q1 is connected to the third end of the second path.

[0034] Specifically, a switching transistor (the PMOS transistor Q1) is provided on the second path. Since the internal resistance of the PMOS transistor Q1 is much smaller than the resistance of the first resistor R1, when the PMOS transistor Q1 is turned on, the current provided by the power generation device is supplied to the load circuit through the PMOS transistor Q1. When the PMOS transistor Q1 is turned off, the current provided by the power generation device is supplied to the load circuit after passing through the first resistor R1. Therefore, the load circuit can be powered by driving the PMOS transistor Q1 to be turned on or off.

[0035] In an embodiment of the present invention, the first end of the voltage dividing sub-circuit is connected to the first end of the driving circuit, the second end of the voltage dividing sub-circuit is grounded, the third end of the voltage dividing sub-circuit is connected to the first end of the driving sub-circuit, and the second end of the driving sub-circuit is connected to the second end of the driving circuit.

[0036] Specifically, a voltage dividing sub-circuit is used to divide the voltage input to the load circuit, so that the driving sub-circuit can determine whether the input voltage of the load circuit is less than a preset voltage threshold according to the divided voltage and a preset value, and further control the conduction and cut-off of the PMOS transistor Q1.

[0037] In an embodiment of the present invention, the driving sub-circuit includes: an MCU chip, an NMOS transistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, and a first capacitor. The input end of the MCU chip is connected to the first end of the driving sub-circuit, the output end of the MCU chip is connected to the gate of the NMOS transistor through the fourth resistor, the source of the NMOS transistor is grounded, the drain of the NMOS transistor is connected to the first end of the third resistor, the second end of the third resistor is connected to the second end of the driving sub-circuit, the second end of the third resistor is connected to the source of the PMOS transistor through the second resistor, the first end of the fifth resistor is connected to the gate of the NMOS transistor, the second end of the fifth resistor is grounded, the first end of the first capacitor is connected to the gate of the NMOS transistor, and the second end of the first capacitor is grounded;

[0038] The MCU chip is configured to: output a low level and turn off the NMOS transistor to disconnect the second path when the divided voltage input to the input end of the MCU chip is less than the preset value; output a high level and turn on the NMOS transistor to turn on the second path when the divided voltage input to the input end of the MCU chip is greater than the preset value.

[0039] Specifically, the MCU chip is used to judge the magnitude relationship between the divided voltage input to the input end of the MCU chip and the preset value. When the divided voltage input to the input end of the MCU chip is less than the preset value, that is, when the input voltage of the load circuit is less than the preset voltage threshold, the MCU chip outputs a low level and turns off the NMOS transistor to disconnect the second path. When the divided voltage input to the input end of the MCU chip is greater than the preset value, that is, when the input voltage of the load circuit is greater than the preset voltage threshold, the MCU chip outputs a high level and turns on the NMOS transistor to turn on the second path.

[0040] In an embodiment of the present invention, the voltage dividing sub-circuit includes a sixth resistor and a seventh resistor. The first end of the sixth resistor is connected to the first end of the voltage dividing sub-circuit, the second end of the sixth resistor is connected to the first end of the seventh resistor, the second end of the seventh resistor is connected to the second end of the voltage dividing sub-circuit, and the second end of the sixth resistor is connected to the third end of the voltage dividing sub-circuit.

[0041] Specifically, the voltage dividing sub-circuit includes a series-connected sixth resistor and seventh resistor. The first end of the sixth resistor is connected to the input end of the load circuit, the second end of the sixth resistor is connected to the first end of the seventh resistor, and the second end of the seventh resistor is grounded. The second end of the sixth resistor is connected to the input end of the MCU chip to provide a divided voltage to the input end of the MCU chip.

[0042] In an embodiment of the present utility model, a diode is provided between the output end of the driving device and the load circuit. The positive electrode of the diode is connected to the output end of the driving device, and the negative electrode of the diode is connected to the load circuit.

[0043] Specifically, to prevent the capacitor in the load circuit from discharging towards the driving device side, a diode is provided between the output end of the driving device and the load circuit in the embodiment of the present utility model.

[0044] In an embodiment of the present utility model, the power generation device is a generator.

[0045] In the embodiment of the present utility model, the power generation device can be a generator or other power generation equipment. The embodiment of the present utility model does not limit the power generation device.

[0046] In the embodiment of the present utility model, the MCU chip can adopt STM32103MCU.

[0047] It should be noted that the embodiment of the present utility model does not limit the models and parameters of the MOS tube, resistor, capacitor, diode, and MCU chip. The models and parameters of the MOS tube, resistor, capacitor, diode, and MCU chip can be set according to actual needs.

[0048] The driving device in the embodiment of the present utility model uses a driving circuit to disconnect the second path when the input voltage of the load circuit is less than the preset voltage threshold, so that the power generation device slowly charges the load circuit through the first path, preventing the capacitor in the load circuit from being broken down due to overcurrent; when the input voltage of the load circuit is greater than the preset voltage threshold, that is, after the capacitor in the load circuit is charged, the second path is conducted, so that the power generation device supplies power to the load circuit through the second path to drive the load circuit to work. The driving device in the embodiment of the present utility model has the characteristics of strong anti-interference ability, good stability, and convenient debugging, and is suitable for characteristics such as high temperature and complex environment underground.

[0049] The present utility model also provides a logging tool.

[0050] Figure 3 It is a schematic diagram of the logging tool in an embodiment of the present utility model. As Figure 3 shown, the logging tool includes a power generation device and the driving device as described above, and the power generation device is connected to the load circuit through the driving device.

[0051] The logging tool in the embodiment of the present utility model has the characteristics of strong anti-interference ability, good stability, and convenient debugging, and is suitable for characteristics such as high temperature and complex environment underground.

[0052] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0053] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 thus should not be construed as a limitation to the present utility model.

[0054] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0055] In the present utility model, unless otherwise clearly specified and defined, terms such as "install", "connect", "connection", "fix", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0056] In the present utility model, unless otherwise clearly stipulated and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0057] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present utility model.

Claims

1. A driving device, characterized in that, The input end of the driving device is connected to the power generation device, and the output end of the driving device is connected to the load circuit. The driving device includes: A first path, with the first end of the first path connected to the input end of the driving device and the second end of the first path connected to the output end of the driving device; A second path, with the first end of the second path connected to the input end of the driving device and the second end of the second path connected to the output end of the driving device; A driving circuit, with the first end of the driving circuit connected to the output end of the driving device and the second end of the driving circuit connected to the third end of the second path, for disconnecting the second path when the voltage at the input end of the driving device is less than a preset voltage threshold, enabling the power generation device to supply power to the load circuit through the first path; and conducting the second path when the voltage at the input end of the driving device is greater than the preset voltage threshold, enabling the power generation device to supply power to the load circuit through the second path.

2. The drive device according to claim 1, characterized in that, The first path includes a first resistor, with the first end of the first resistor connected to the first end of the first path and the first end of the first resistor connected to the second end of the first path.

3. The drive device according to claim 1, characterized in that The second path includes a PMOS transistor, with the source of the PMOS transistor connected to the first end of the second path, the drain of the PMOS transistor connected to the second end of the second path, and the gate of the PMOS transistor connected to the third end of the second path.

4. The drive device according to any one of claims 1 to 3, characterized in that, The driving circuit includes a voltage dividing sub-circuit and a driving sub-circuit. The first end of the voltage dividing sub-circuit is connected to the first end of the driving circuit, the second end of the voltage dividing sub-circuit is grounded, the third end of the voltage dividing sub-circuit is connected to the first end of the driving sub-circuit, and the second end of the driving sub-circuit is connected to the second end of the driving circuit.

5. The drive device according to claim 4, characterized in that, The driving sub-circuit includes: an MCU chip, an NMOS transistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, and a first capacitor. The input end of the MCU chip is connected to the first end of the driving sub-circuit, the output end of the MCU chip is connected to the gate of the NMOS transistor through the fourth resistor, the source of the NMOS transistor is grounded, the drain of the NMOS transistor is connected to the first end of the third resistor, the second end of the third resistor is connected to the second end of the driving sub-circuit, the second end of the third resistor is connected to the source of the PMOS transistor through the second resistor, the first end of the fifth resistor is connected to the gate of the NMOS transistor, the second end of the fifth resistor is grounded, the first end of the first capacitor is connected to the gate of the NMOS transistor, and the second end of the first capacitor is grounded; The MCU chip is configured to: output a low level and disconnect the NMOS transistor to disconnect the second path when the divided voltage input to the input end of the MCU chip is less than a preset value; and output a high level and conduct the NMOS transistor to conduct the second path when the divided voltage input to the input end of the MCU chip is greater than the preset value.

6. The drive device according to claim 4, characterized in that The voltage dividing sub-circuit includes a sixth resistor and a seventh resistor. The first end of the sixth resistor is connected to the first end of the voltage dividing sub-circuit. The second end of the sixth resistor is connected to the first end of the seventh resistor. The second end of the seventh resistor is connected to the second end of the voltage dividing sub-circuit. The second end of the sixth resistor is connected to the third end of the voltage dividing sub-circuit.

7. The drive device according to claim 1, characterized in that A diode is provided between the output end of the driving device and the load circuit. The positive electrode of the diode is connected to the output end of the driving device, and the negative electrode of the diode is connected to the load circuit.

8. The drive device according to claim 1, characterized in that, The power generation device is a generator.

9. The drive device according to claim 1, characterized in that At least one capacitor is provided in the load circuit.

10. A logging tool, characterized in that, It includes a power generation device and the driving device according to any one of claims 1-9. The power generation device is connected to the load circuit through the driving device.

Images