Full duplex wireless communication power supply for rotary steering logging instrument

Abstract

The utility model discloses a full duplex wireless communication power supply for a rotary steering logging instrument, and belongs to the technical field of full duplex wireless communication. Comprising a power transmitting circuit, a power receiving circuit, a power transformer circuit, a static side coding circuit, a rotating side communication transformer circuit, a static side communication transformer circuit, a rotating side decoding circuit and a static side decoding circuit. According to the full-duplex wireless communication power supply for the rotary steering logging instrument, the power transmitting circuit transmits power current to the power receiving circuit through the power transformer circuit, and signal transmission from a rotating end to a static end is achieved by changing the frequency of the power current; through cooperation of the static side coding circuit and the decoding circuit with the communication transformer circuits on the two sides, communication signal transmission from the static side to the rotating side is achieved by means of the power transformer circuit, compared with an existing device, the problem that internal space is wasted due to separate transmission of two modules is solved, and the integration level and stability are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to full duplex wireless communication technical field, especially relate to a full duplex wireless communication power supply for rotary steering well logging instrument. BACKGROUND

[0002] With the development of rotary steering well logging technology, reliable wireless communication power supply system is needed to ensure the stable and efficient work of the equipment. Since the rotating part of the rotary steering well logging instrument is in a high-speed rotating state and the stationary part is in a stationary state, the two parts cannot be electrically connected. The two parts need power transmission and data communication. In the prior art, the transmission is usually separated by two modules. Since the internal space of the rotary steering well logging instrument is limited, the design volume of the two modules is large, which wastes the internal space of the rotary steering well logging instrument.

[0003] Therefore, the full duplex wireless communication power supply for rotary steering well logging instrument is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0004] The utility model discloses a full duplex wireless communication power supply for rotary steering well logging instrument is provided to solve the problem of two modules separate transmission affecting the integration in the prior art.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A full duplex wireless communication power supply for rotary steering well logging instrument, including power transmitting circuit, power receiving circuit, power transformer circuit, stationary side encoding circuit, rotating side communication transformer circuit, stationary side communication transformer circuit, rotating side decoding circuit and stationary side decoding circuit, the power transmitting circuit passes through control chip and adjusts the frequency of alternating current, and the power receiving circuit is connected with the stationary side decoding circuit.

[0007] The power transformer circuit includes a first power winding (POWER_PRI) and a second power winding (POWER_SEC) that cooperate with each other. The power transmitting circuit realizes power current transmission to the power receiving circuit through the power transformer circuit.

[0008] The stationary side encoding circuit is connected to the two ends of the power transformer circuit on the stationary side through the stationary side communication transformer circuit. The rotating side decoding circuit is connected to the two ends of the power transformer circuit on the rotating side through the rotating side communication transformer circuit. The stationary side encoding circuit is connected to the stationary side communication transformer circuit, the power transformer circuit and the rotating side communication transformer circuit, and cooperates with the rotating side decoding circuit to realize the communication signal transmission from the stationary side to the rotating side.

[0009] Preferably, the rotating side communication transformer circuit comprises a first bus winding (T), a receiving winding (RX) and a first communication capacitor C, and the stationary side communication transformer circuit comprises a second bus winding (T), a transmitting winding (TX) and a second communication capacitor C.

[0010] Preferably, the stationary side encoding circuit comprises a driving circuit composed of a first PMOS (Q1), a second NMOS (Q2), a third PMOS (Q3) and a fourth NMOS (Q4), the driving circuit is connected to the transmitting winding (TX) and generates a frequency-controlled sine wave on the transmitting winding (TX) through driving signals H1, H2, L1 and L2.

[0011] Preferably, the rotating side decoding circuit comprises a first comparator (U1), wherein the positive input terminal of the first comparator (U1) is connected to the receiving winding (RX), the negative input terminal of the first comparator (U1) is connected to a reference voltage, and the output terminal of the first comparator (U1) outputs an RX_MCU signal.

[0012] Preferably, the power transmitting circuit comprises a bridge inverter circuit composed of a fifth NMOS (Q5), a sixth NMOS (Q6), a seventh NMOS (Q7) and an eighth NMOS (Q8), a control chip MCU, a current sensor and two bootstrap drive chips IR2110.

[0013] Preferably, the power receiving circuit comprises a bridge rectifier circuit composed of a first diode (D1), a second diode (D2), a third diode (D3) and a fourth diode (D4), an LC filter circuit composed of a filter capacitor (Crec) and an inductor (L3) and a capacitor (Crec), a BUCK circuit for voltage stabilization, and a load (RL).

[0014] Preferably, the positive electrode of the fourth diode is connected in series with a sampling resistor, a V_is signal line is provided between the fourth diode and the sampling resistor, and the other end of the V_is signal line is connected to the stationary side decoding circuit.

[0015] Preferably, the stationary side decoding circuit comprises a second comparator, the negative input terminal of the second comparator is connected to the V_is signal line, and the positive input terminal of the comparator is connected to a 3.3V power supply.

[0016] In summary, the technical effects and advantages of the full-duplex wireless communication power supply for the rotary steering well logging instrument are as follows: compared with the prior art, the power transmitting circuit transmits power current to the power receiving circuit through the first power winding and the second power winding, so as to realize wireless power supply from the rotating end to the stationary end, the frequency of the power current is changed to realize signal transmission from the rotating end to the stationary end, the stationary side coding circuit cooperates with the communication transformer circuit on the two sides, and the power transformer circuit is used to realize communication signal transmission from the stationary side to the rotating side, compared with the prior art, the problem of waste of internal space caused by separate transmission of two modules is avoided, the volume is small, and the integration is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the utility model;

[0018] Figure 2 It is a structural schematic view of the stationary side coding circuit in the utility model;

[0019] Figure 3 It is a structural schematic view of the rotating side decoding circuit in the utility model;

[0020] Figure 4 It is a structural schematic view of the rotating side and the stationary side communication transformer circuit in the utility model;

[0021] Figure 5 It is a structural schematic view of the power transmitting circuit in the utility model;

[0022] Figure 6 It is a structural schematic view of the power receiving circuit in the utility model;

[0023] Figure 7 It is a structural schematic view of the power transformer circuit in the utility model;

[0024] Figure 8 It is a structural schematic view of the stationary side decoding circuit in the utility model. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0026] REFERENCE Figure 1The application relates to a full-duplex wireless communication power supply for a rotary steering well logging instrument, which comprises a power transmitting circuit, a power receiving circuit, a power transformer circuit, a stationary side coding circuit, a rotating side communication transformer circuit, a stationary side communication transformer circuit, a rotating side decoding circuit and a stationary side decoding circuit.

[0027] Referring to Figure 5 It is to be noted that the power transmitting circuit is connected with a control chip (MCU), and the frequency of the alternating current of the power transmitting circuit can be controlled by outputting driving signals H5, H7, L6 and L8 through the MCU.

[0028] Referring to Figure 1 、 Figure 7 The power transformer circuit comprises a first power winding (POWER_PRI) and a second power winding (POWER_SEC) which cooperate with each other, and the power transmitting circuit realizes power current transmission to the power receiving circuit through the power transformer circuit.

[0029] The stationary side coding circuit is connected with the power transformer circuit at the two ends of the stationary side through a stationary side communication transformer circuit, and the rotating side decoding circuit is connected with the power transformer circuit at the two ends of the rotating side through a rotating side communication transformer circuit.

[0030] The full-duplex wireless communication power supply for the rotary steering well logging instrument has the following functions in use:

[0031] When power current is transmitted, the power transmitting circuit transmits power current to the power receiving circuit through the first power winding (POWER_PRI) and the second power winding (POWER_SEC), so as to realize wireless power supply from the rotating end to the stationary end;

[0032] When signals are transmitted from the rotating side to the stationary side, the frequency of the power current is changed by outputting driving signals H5, H7, L6 and L8 through the MCU, and the frequency change of the power current received by the stationary end realizes signal transmission from the rotating end to the stationary end.

[0033] When the stationary side transmits signals to the rotating side: the stationary side encoding circuit outputs signals of different frequencies to the stationary side communication transformer circuit, and through the coupling of the power transformer circuit and the rotating side communication transformer circuit, the signals are input to the rotating side decoding circuit. After processing by the decoding circuit, the rotating side MCU can recognize signals of different frequencies, and then convert them into digital communication signals of 0 and 1, i.e., complete the communication data transmission from the stationary side to the rotating side.

[0034] With reference to Figure 4 The rotating side communication transformer circuit includes a first bus winding (T), a receiving winding (RX), and a first communication capacitor C, and the stationary side communication transformer circuit includes a second bus winding (T), a transmitting winding (TX), and a second communication capacitor C. Since the structure principles of the rotating side communication transformer and the stationary side communication transformer are consistent, for convenience, the first bus winding and the second bus winding are referred to as bus windings (T), and the first communication capacitor C and the second communication capacitor C are referred to as capacitors C. The capacitors C can play a filtering role and shield interference frequencies.

[0035] With reference to Figures 2-4 The stationary side encoding circuit includes a driving circuit composed of PMOS (Q1), NMOS (Q2), PMOS (Q3), and NMOS (Q4). The driving circuit is connected to the transmitting winding (TX). The sources of Q1 and Q3 are connected to a 3.3V power supply, the drains are respectively connected to the drains of Q2 and Q4, and the bases are respectively connected to the driving signals H1 and H2 of the MCU. The sources of Q2 and Q4 are connected to R1, the drains are respectively connected to the drains of Q1 and Q3, and the bases are respectively connected to the driving signals L1 and L2 of the MCU. One end of R1 is connected to the sources of Q2 and Q4, and the other end is grounded. Through the driving signals H1, H2, L1, and L2, a frequency-controlled sine wave is generated on TX.

[0036] With reference to Figure 3, the rotating side decoding circuit includes a first comparator (U1), a capacitor (C1), a capacitor (C2), a resistor (R2), a resistor (R3), a resistor (R4), a resistor (R5), a resistor (R6), and a resistor (R7). One end of the capacitor (C1) is connected to a receiving winding (RX), one end of the capacitor (C1) is connected to the resistor (R2), one end of the resistor (R2) is connected to the capacitor (C1), one end of the capacitor (C2) is connected to the resistor (R2), one end of the resistor (R2) is connected to the resistor (R4), one end of the resistor (R3) is connected to a 3.3V power supply, one end of the resistor (R4) is connected to the resistor (R3), one end of the resistor (R3) is connected to a ground power supply, one end of the resistor (R5) is connected to a 3.3V power supply, one end of the resistor (R6) is connected to the resistor (R5), one end of the resistor (R6) is connected to the ground, the first comparator (U1) has a positive input end connected to the resistor (R4), a negative input end connected to the resistor (R5), and an output end connected to the resistor (R7), one end of the resistor (R7) is connected to a 3.3V power supply, and the other end of the resistor (R7) is connected to the output end of the first comparator (U1), and the output end of the first comparator (U1) outputs an RX_MCU signal.

[0037] Referring to Figures 5-6 , the power transmitting circuit includes a bridge inverter circuit composed of a fifth NMOS (Q5), a sixth NMOS (Q6), a seventh NMOS (Q7), and an eighth NMOS (Q8), a control chip MCU, a current sensor, and two bootstrap drive chips IR2110. POWER_IN is an input DC signal, the drive signal H5 of Q5 is the same as the drive signal L8 of Q8, the drive signal L6 of Q6 is the same as the drive signal H7 of Q7, they are all square waves with a duty cycle of 50% and a frequency of f, and H5 and L6 are complementary, and H7 and L8 are complementary. Since Q5 and Q7 are NMOS and cannot be directly driven, IR2110 bootstrap drive chips are needed for driving. IR2110 bootstrap drive chips are prior art, but will not be described in detail. H5_MCU, L6_MCU, H7_MCU, and L8_MCU can be directly given by the control chip. When the control chip gives the correct drive signal, a square wave with a duty cycle of 50% and a frequency of F1 will be generated on POWER_PRI. When the power part is working, the signal frequency on the power transformer is F1. When data communication is needed, the controller chip MCU will generate alternating drive signals F1 and F2, F1 represents 0, and F2 represents 1. At this time, the F1 or F2 signal will be transmitted to the V_is signal through the coupling of the power transformer. After being processed by the stationary side decoding circuit, the MCU decodes F1 and F2 to 0 and 1, respectively, to complete the communication signal transmission from the rotating side to the stationary side.

[0038] Referring to Figure 6, the power receiving circuit includes a bridge rectifier circuit composed of a first diode (D1), a second diode (D2), a third diode (D3), and a fourth diode (D4), an LC filter circuit composed of a filter capacitor (Crec) and an inductor (L3) and a capacitor (Crec), a BUCK circuit for voltage stabilization, and a load (RL). When the power transmitting circuit (104) is working normally, a square wave with a duty cycle of 50% and a frequency of f is generated on POWER_PRI. Due to the action of the power transformer circuit, a square wave with the same duty cycle of 50% and the frequency of f is generated on POWER_SEC. The square wave is filtered by Crec to generate a direct current voltage. The direct current voltage is stabilized by the BUCK circuit to generate a stable direct current voltage POWER_OUT, that is, the power transmission is completed. The BUCK circuit and the LC filter circuit are prior art and will not be described in detail.

[0039] Referring to Figure 6 , the anode of the fourth diode (D4) is connected in series with a sampling resistor (R_SHUNT), and a V_is signal line is provided between the fourth diode (D4) and the sampling resistor (R_SHUNT), with the other end of the V_is signal line connected to the stationary side decoding circuit. The sampling resistor (R_SHUNT) in the power receiving circuit samples the current flowing through D4 and converts the current into a voltage signal V_is, which contains frequency information F3, F4 of the communication signal. After being inversely amplified by the stationary side decoding circuit, the F3, F4 are decoded by the stationary side MCU to obtain corresponding digital communication 0, 1 signals.

[0040] The frequency F1, F2 of the power current is much smaller than the frequency F3, F4 of the communication signal. When the power transformer circuit simultaneously transmits the power current and the communication signal, the two work at different frequencies. The power receiving circuit filters out the high-frequency communication signal, and the rotating side communication transformer circuit and the rotating side decoding circuit filter out the low-frequency power current signal, thereby realizing full-duplex communication.

[0041] Referring to Figure 8 , the stationary side decoding circuit includes a second comparator, the V_is signal line is connected to the negative input end of the second comparator, and the positive input end of the comparator is connected to a 3.3V power supply. The size of the V_is signal and the reference voltage is compared by the second comparator to realize decoding.

[0042] The positive input end of the second comparator is grounded through R4, and R3 is connected in series between the positive input end of the second comparator and the 3.3V power supply. R3 and R4 constitute a voltage divider, which provides a stable reference voltage for the positive input end of the second comparator, ensuring accurate signal decoding.

[0043] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A full duplex wireless communication power supply for a rotary steerable well logging instrument, characterized by, The power transmitting circuit, the power receiving circuit, the power transformer circuit, the static side encoding circuit, the rotating side communication transformer circuit, the static side communication transformer circuit, the rotating side decoding circuit and the static side decoding circuit are connected, the power transmitting circuit adjusts the frequency of the alternating current through the control chip, and the power receiving circuit is connected with the static side decoding circuit; The power transformer circuit comprises the first power winding and the second power winding which are matched with each other, and the power transmitting circuit realizes the power current transmission to the power receiving circuit through the power transformer circuit. The static side encoding circuit is connected at both ends of the power transformer circuit on the static side through the static side communication transformer circuit, the rotating side decoding circuit is connected at both ends of the power transformer circuit on the rotating side through the rotating side communication transformer circuit, and the static side encoding circuit realizes the communication signal transmission from the static side to the rotating side through the static side communication transformer circuit, the power transformer circuit and the rotating side communication transformer circuit in cooperation with the rotating side decoding circuit.

2. A full duplex wireless communication power supply for a rotary steerable well instrument according to claim 1, characterized in that, The rotating side communication transformer circuit comprises the first bus winding, the receiving winding and the first communication capacitor, and the static side communication transformer circuit comprises the second bus winding, the transmitting winding and the second communication capacitor.

3. A full duplex wireless communication power supply for a rotary steerable well instrument according to claim 2, wherein, The static side encoding circuit comprises the driving circuit composed of the first PMOS, the second NMOS, the third PMOS and the fourth NMOS, the driving circuit is connected with the transmitting winding, and the frequency-controlled sine wave is generated on the transmitting winding through the driving signal.

4. A full duplex wireless communication power supply for a rotary steerable well instrument according to claim 1, characterized in that, The rotating side decoding circuit comprises the first comparator, the positive input end of the first comparator is connected with the receiving winding of the communication transformer, the negative input end of the first comparator is connected with the reference voltage, and the output end of the first comparator outputs the RX_MCU signal.

5. A full duplex wireless communication power supply for a rotary steerable well instrument according to claim 1, wherein, The power transmitting circuit comprises the bridge inverter circuit composed of the fifth NMOS, the sixth NMOS, the seventh NMOS and the eighth NMOS, the control chip MCU, the current sensor and the two bootstrap drive chips IR2110.

6. A full duplex wireless communication power supply for a rotary steerable well instrument according to claim 1, wherein, The power receiving circuit comprises the bridge rectifier circuit composed of the first diode, the second diode, the third diode and the fourth diode, the LC filter circuit composed of the filter capacitor, the inductor and the capacitor, the BUCK circuit for voltage stabilization and the load.

7. A full duplex wireless communication power supply for a rotary steerable well instrument according to claim 6, wherein, The positive electrode of the fourth diode is connected with the sampling resistor in series, the V_is signal line is arranged between the fourth diode and the sampling resistor, and the other end of the V_is signal line is connected with the static side decoding circuit.

8. A full duplex wireless communication power supply for a rotary steerable well instrument according to claim 7, wherein, The static side decoding circuit comprises the second comparator, the V_is signal line is connected with the negative input end of the comparator, and the positive input end of the comparator is connected with the 3.3V power supply.

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