Cable and direct push dual-mode power supply switching circuit and control system

Abstract

The utility model discloses a cable and direct push dual-mode power supply switching circuit and a control system thereof, and the circuit comprises an AC power transformer, a DC power supply, a power supply circuit, and an attenuation isolation circuit which are electrically connected with a rectifier bridge and a signal sampling circuit. The signal acquisition and processing circuit is electrically connected with the amplification filter circuit through the signal selection emitter follower circuit, and the amplification filter circuit is electrically connected with the attenuation isolation circuit. According to the cable and direct push dual-mode power supply switching circuit and the control system disclosed by the utility model, automatic adjustment of a cable and storage dual-mode logging mode is realized, the requirement of logging in a complex environment can be met, complete compatibility can be realized for imported and domestic diversified logging systems, and the market utilization rate is extremely high.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas geological exploration and measurement, and in particular relates to a cable and a direct-push dual-mode power supply switching circuit and a control system in this field. Background Art

[0002] As exploration and development technologies continue to mature, breakthroughs are being made in deep and ultra-deep oil and gas exploration. In particular, the Tahe (Toputai) and Shunbei blocks contain oil and gas deposits exceeding 8,000 meters. These reservoirs are characterized by deep burial depths, high temperatures, variable wellbore pressure systems, and complex geological conditions. To improve development efficiency, highly deviated or horizontal wells are often used. However, well logging operations are challenging due to factors such as well conditions, drilling techniques, wellbore dimensions, well inclination, well temperature, wellbore structure, target stratum leakage, overflow, and wellbore instability.

[0003] At present, ultra-deep wells and horizontal wells mainly use drilling tool conveyor cable wet joint, while drilling and storage logging technology. However, due to the limitations of process and instrument design, the above logging technology has certain safety hazards in logging operations in complex wells such as ultra-deep wells and horizontal wells. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a cable and direct-push dual-mode power supply switching circuit and control system, which realizes the automatic adjustment of the cable and storage "dual-mode" logging mode, and can meet the needs of logging in complex environments.

[0005] The present invention adopts the following technical solutions:

[0006] A cable and direct-drive dual-mode power switching circuit, the improvement of which lies in: comprising an AC power transformer, a DC power supply, a power supply circuit and an attenuation isolation circuit electrically connected to a rectifier bridge and a signal sampling circuit; a signal acquisition and processing circuit electrically connected to an amplifying and filtering circuit via a signal selection emitter-follower circuit; and an amplifying and filtering circuit electrically connected to the attenuation isolation circuit; if AC power is output by the AC power transformer, the rectifier bridge and the signal sampling circuit convert the AC power into DC power and transmit it to the power supply circuit; if DC power is output by a DC power supply, the rectifier bridge and the signal sampling circuit directly transmit the DC power to the power supply circuit, and the power supply circuit supplies power to the signal acquisition and processing circuit, the signal selection emitter-follower circuit and the amplifying and filtering circuit; the rectifier bridge and the signal sampling circuit convert the collected analog signal into a digital signal, and the digital signal is transmitted to each channel of the signal selection emitter-follower circuit via the attenuation isolation circuit and the amplifying and filtering circuit; the signal acquisition and processing circuit controls whether each channel of the signal selection emitter-follower circuit is conductive and receives the digital signal transmitted from the conductive channel.

[0007] Furthermore, the DC power supply is a battery short section.

[0008] Furthermore, the connection terminal 1 of the rectifier bridge and the signal sampling circuit is electrically connected to the positive end of the diode V2 and the negative end of the diode V3, the connection terminal 2 is electrically connected to the positive end of the diode V1 and the negative end of the diode V4, the connection terminal 3 is electrically connected to the positive end of the diode V6, the connection terminal 4 is electrically connected to the positive end of the diode V3, the positive end of the diode V4, the negative end of the polarity capacitor C1, the negative end of the polarity capacitor C2, the capacitor C3, the connection terminal 8, the connection terminal 9, the connection terminal 5 is electrically connected to the negative end of the diode V1, the negative end of the diode V2, the positive end of the diode V5, the positive end of the polarity capacitor C1, the polarity capacitor C2, the capacitor C3, the connection terminal 8, the connection terminal 9, the connection terminal 5 is electrically connected to the negative end of the diode V1, the negative end of the diode V2, the positive end of the diode V5, the positive end of the polarity capacitor C1, the polarity capacitor C2 The positive end of capacitor C2 is electrically connected, one end of inductor L1 is electrically connected to the negative end of diode V5, the negative end of diode V6, and one end of capacitor C3, the other end of inductor L1 is electrically connected to terminal 6 and terminal 7, terminal 8 is electrically connected to the positive end of diode V3, the positive end of diode V4, the negative end of polarity capacitor C1, the negative end of polarity capacitor C2, capacitor C3, terminal 4, and terminal 9, and terminal 9 is electrically connected to the positive end of diode V3, the positive end of diode V4, the negative end of polarity capacitor C1, the negative end of polarity capacitor C2, capacitor C3, terminal 4, and terminal 8.

[0009] Furthermore, the first pin of the power module D1 of the power supply circuit is connected to terminal 1, the second pin of the power module D1 is connected to terminal 2, the third pin of the power module D1 is connected to the second pin of the filter module D3, the fourth pin of the power module D1 is suspended, the fifth pin of the power module D1 is connected to the first pin of the filter module D3, the first pin of the power module D2 is connected to terminal 3, the second pin of the power module D2 is connected to terminal 4, the third pin of the power module D2 is connected to the fourth pin of the filter module D3, the fourth pin of the power module D2 is suspended, the fifth pin of the power module D2 is connected to the third pin of the filter module D3, the fifth pin of the filter module D3 is connected to terminal 5, and is electrically connected to the positive end of the capacitor C1 and the polarity capacitor C3, the sixth pin of the filter module D3 is connected to terminal 6, and is electrically connected to the negative end of the capacitor C1 and the polarity capacitor C3, the seventh pin of the filter module D3 is connected to terminal 7, and is electrically connected to the positive end of the capacitor C2 and the polarity capacitor C4. The ends are electrically connected, the 8th pin of the filter module D3 is connected to the terminal 8, and is electrically connected to the negative end of the capacitor C2 and the polarity capacitor C4, the red wire of the power module N1 is connected to the terminal 9, the black wire of the power module N1 is connected to the terminal 10, the yellow wire of the power module N1 is suspended, the white wire of the power module N1 is connected to the 1st pin of the filter module D4, the brown wire of the power module N1 is connected to the 2nd pin of the filter module D4, the blue wire of the power module N1 is connected to the 3rd pin of the filter module D4, the 4th pin of the filter module D4 is suspended, the 5th pin of the filter module D4 is connected to the terminal 11, and is electrically connected to the positive end of the capacitor C5 and the polarity capacitor C7, the 6th pin of the filter module D4 is connected to the terminal 12, and is electrically connected to the negative end of the capacitor C6 and the polarity capacitor C8, the 7th pin of the filter module D4 is connected to the terminal 13, and is connected to the negative end of the capacitor C5, the capacitor C6, the polarity capacitor C7, and the positive end of the polarity capacitor C8, and the 8th pin of the filter module D4 is suspended.

[0010] Furthermore, the first pin of the integrated circuit N1 of the attenuation isolation circuit is connected to the +12V power supply and one end of the capacitor C5, the second pin of the integrated circuit N1 is connected to one end of the capacitor C4, one end of the capacitor C5, one end of the capacitor C6, and is electrically connected to the analog ground AGND, the third pin of the integrated circuit N1 is connected to one end of the capacitor C4, the fourth pin and the fifth pin of the integrated circuit N1 are suspended, the sixth pin of the integrated circuit N1 is electrically connected to one end of the resistor R5, the seventh pin of the integrated circuit N1 is electrically connected to one end of the resistor R6, the eighth pin of the integrated circuit N1 is electrically connected to the analog ground AGND, the ninth pin of the integrated circuit N1 is electrically connected to one end of the resistor R4 and one end of the capacitor C3, the tenth pin of the integrated circuit N1 is electrically connected to the eleventh pin of the integrated circuit N1, the twelfth pin of the integrated circuit N1 is electrically connected to one end of the resistor R3, one end of the resistor R4, and the capacitor C1. One end of C3 is electrically connected, the 13th pin of the integrated circuit N1 is left floating, the 14th pin of the integrated circuit N1 is electrically connected to one end of the capacitor C2, the 15th pin of the integrated circuit N1 is electrically connected to the positive end of the diode V1, one end of the capacitor C1, and the wiring terminal 2, the 16th pin of the integrated circuit N1 is electrically connected to the emitter electrode of the transistor Q1 and one end of the capacitor C1, the base of the transistor Q1 is electrically connected to one end of the resistor R2 and the negative end of the diode V1, the collector of the transistor Q1 is electrically connected to one end of the resistor R1 and one end of the resistor R2, the wiring terminal 1 is electrically connected to one end of the resistor R1, the wiring terminal 2 is electrically connected to the positive end of the diode V1, one end of the capacitor C1, and one end of the capacitor C2, the wiring terminal 3 is electrically connected to one end of the resistor R3, the wiring terminal 4 is electrically connected to one end of the capacitor C3, and the wiring terminal 5 is electrically connected to one end of the resistor R6 and one end of the capacitor C6.

[0011] Furthermore, pins 1-20 of the homemade module D1 of the signal acquisition and processing circuit are suspended, pin 21 is electrically connected to terminal 12, pin 22 is electrically connected to terminal 11, pin 23 is suspended, pin 24 is electrically connected to terminal 10, pin 25 is electrically connected to terminal 9, pin 26 is suspended, pin 27 is electrically connected to terminal 8, pins 28-32 are suspended, pin 33 is electrically connected to terminal 7, pin 34 is electrically connected to terminal 6, pin 35 is electrically connected to terminal 5, pin 36 is electrically connected to terminal 4, pin 37 is electrically connected to terminal 3, pin 38 is electrically connected to terminal 2, and pin 39 is electrically connected to terminal 1.

[0012] Furthermore, the first pin of the integrated circuit N1 of the signal selection emitter-follower circuit is electrically connected to the terminal 7, the second pin of the integrated circuit N1 is electrically connected to one end of the resistor R1, the fifth pin of the integrated circuit N1, the sixth pin of the integrated circuit N1, and the analog ground AGND, the third pin of the integrated circuit N1 is electrically connected to the analog ground AGND, the fourth pin of the integrated circuit N1 is electrically connected to the terminal 8, the fifth pin of the integrated circuit N1 is electrically connected to one end of the resistor R1, the second pin of the integrated circuit N1, the sixth pin of the integrated circuit N1, and the analog ground AGND, the sixth pin of the integrated circuit N1 is electrically connected to one end of the resistor R1, the second pin of the integrated circuit N1, the fifth pin of the integrated circuit N1, and the analog ground AGND, the seventh pin of the integrated circuit N1 is left floating, the eighth pin of the integrated circuit N1 is electrically connected to the terminal 5, the ninth pin of the integrated circuit N1 is electrically connected to the terminal 4, and the tenth pin of the integrated circuit N1 is electrically connected to the terminal 3. Pin 11 of the integrated circuit N1 is electrically connected to terminal 2, pin 12 of the integrated circuit N1 is electrically connected to one end of the resistor R1 and pin 3 of the integrated circuit N2, pin 13 of the integrated circuit N1 is electrically connected to terminal 1, pin 14 of the integrated circuit N1 is electrically connected to a +12V power supply, pin 15 of the integrated circuit N1 is electrically connected to a -12V power supply, pin 16 of the integrated circuit N1 is electrically connected to terminal 6, pin 1 of the integrated circuit N2 is left floating, pin 2 of the integrated circuit N2 is electrically connected to pin 6 of the integrated circuit N2 and terminal 9, pin 3 of the integrated circuit N2 is electrically connected to one end of the resistor R1 and pin 12 of the integrated circuit N1, pin 4 of the integrated circuit N2 is electrically connected to the -12V power supply, pin 5 of the integrated circuit N2 is left floating, pin 6 of the integrated circuit N2 is electrically connected to pin 2 of the integrated circuit N2 and terminal 9, and pin 7 of the integrated circuit N2 is electrically connected to the +12V power supply.

[0013] Furthermore, the first pin of the integrated circuit N1 of the amplifying and filtering circuit is electrically connected to one end of the resistor R1 and one end of the resistor R3, the second pin of the integrated circuit N1 is electrically connected to one end of the resistor R5 and one end of the resistor R6*, the third pin of the integrated circuit N1 is electrically connected to one end of the resistor R5 and one end of the resistor R6*, the fourth pin of the integrated circuit N1 is electrically connected to one end of the resistor R2 and one end of the resistor R4, the fifth pin of the integrated circuit N1 is electrically connected to one end of the capacitor C2 and a -12V power supply, the sixth pin of the integrated circuit N1 is electrically connected to one end of the capacitor C2 and an analog ground AGND, the seventh pin of the integrated circuit N1 is electrically connected to one end of the resistor R7, the eighth pin of the integrated circuit N1 is electrically connected to one end of the capacitor C1 and a +12V power supply, the first pin of the integrated circuit N2 is floating, the second pin of the integrated circuit N2 is electrically connected to one end of the resistor R9, one end of the capacitor C3, the test point TP2, and the sixth pin of the integrated circuit N2, the third pin of the integrated circuit N2 is electrically connected to the resistor One end of R8 and one end of capacitor C4 are electrically connected, the fourth pin of integrated circuit N2 and one end of capacitor C6 and the -12V power supply are electrically connected, the fifth pin of integrated circuit N2 is floating, the sixth pin of integrated circuit N2 and one end of resistor R9, one end of capacitor C3, test point TP2, and the second pin of integrated circuit N2 are electrically connected, the seventh pin of integrated circuit N2 and the +12V power supply are electrically connected, the eighth pin of integrated circuit N2 is floating, the test point TP1 and one end of resistor R7, one end of resistor R8, and one end of capacitor C3 are electrically connected, the test point TP2 and one end of resistor R9, one end of capacitor C3, the second pin of integrated circuit N2, and the sixth pin of integrated circuit N2 are electrically connected, the wiring terminal 1 and one end of resistor R1 are electrically connected, the wiring terminal 2 and one end of resistor R2 are electrically connected, the wiring terminal 3 and one end of resistor R9 are electrically connected, and one end of resistor R3, one end of resistor R4, one end of capacitor C4, one end of capacitor C5, and one end of capacitor C6 are connected to analog ground AGND.

[0014] A control system uses the above-mentioned switching circuit, and its improvement lies in: the signal acquisition and processing circuit controls whether the various channels of the signal selection emitter-follower circuit are conductive, and receives the digital signal transmitted by the conductive channel, and determines whether the power is supplied by the cable through the AC power transformer or the DC power supply. If the power is supplied by the cable, the cable logging communication protocol is adopted; if the power is supplied by the DC power supply, the direct-push logging communication protocol is adopted.

[0015] Furthermore, if the power supply is cable powered, the 1M communication rate CAN bus configuration is started; if the power supply is DC power supply, the 500K communication rate CAN bus configuration is started.

[0016] The beneficial effects of the present invention are:

[0017] The disclosed cable and direct-push dual-mode power switching circuit and control system achieve automatic adjustment of the cable and storage dual-mode logging modes, meeting the needs of logging in complex environments. It is fully compatible with a wide range of imported and domestic logging systems, resulting in high market utilization and widespread adoption, improving logging timeliness and the ability to handle complex downhole conditions. The system can operate at a constant temperature of 230°C for two hours, significantly enhancing reliability and ensuring accurate and stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a block diagram of the switching circuit disclosed in the present invention;

[0019] Figure 2 It is a schematic diagram of a rectifier bridge and a signal sampling circuit in the switching circuit disclosed in the present invention;

[0020] Figure 3 is a schematic diagram of a power supply circuit in the switching circuit disclosed in the present invention;

[0021] Figure 4 It is a schematic diagram of an attenuation isolation circuit in a switching circuit disclosed in the present invention;

[0022] Figure 5 It is a schematic diagram of a signal acquisition and processing circuit in the switching circuit disclosed in the present invention;

[0023] Figure 6 It is a schematic diagram of a signal selection emitter-follower circuit in the switching circuit disclosed in the present invention;

[0024] Figure 7 It is a schematic diagram of the amplifying and filtering circuit in the switching circuit disclosed in the present invention.

[0025] Reference numerals:

[0026] 1—Power transformer; 2—DC power supply; 3—Rectifier bridge and signal sampling circuit; 4—Power supply circuit; 5—Attenuation isolation circuit; 6—Amplification and filtering circuit; 7—Signal selection emitter-follower circuit; 8—Signal acquisition and processing circuit. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] Example 1, this embodiment discloses a cable and direct-push dual-mode power switching circuit, such as Figure 1 As shown, it includes an AC power transformer 1 electrically connected to a rectifier bridge and a signal sampling circuit 3, a DC power supply (battery short section) 2, a power circuit 4 and an attenuation isolation circuit 5.

[0029] The power transformer converts higher-voltage AC to lower-voltage AC. Its operating temperature range is -25°C to 230°C. Its no-load current is ≤ 0.02A. When the voltage varies within 220V ± 20% (50Hz), the current variation is no more than 20mA. The DC power supply (battery short section) provides DC voltage and can provide a 20Ah capacity at temperatures up to 230°C.

[0030] The rectifier bridge and signal sampling circuit convert the lower voltage AC into DC and provide a sampling signal. The signal acquisition unit converts the analog signal into a digital signal. The power supply circuit converts the ripple-reduced DC into digital power and analog power through a DC-DC power supply module. After passing through a filter module, the ripple noise is further reduced and converted into the +5V, +12V, and -12V power supplies required by analog and digital circuits.

[0031] DC-DC power module operating temperature: -55°C to +230°C. Maximum case temperature: +235°C. Input voltage: 36 to 108V, output voltage: 5V and ±12V. Output ripple: 100mVp-p, typical 30mVp-p. Output power: 5W. Output accuracy: less than 5%. Load regulation: less than 5%. Temperature stability: less than ±2.5%, typical ±1%. Line regulation: ±0.1% (10% linear variation).

[0032] The functions of the attenuation isolation circuit are: high isolation voltage, providing electrical isolation between signals, enhancing system safety; low power consumption design, reducing heat generation, extending equipment life; wide temperature range operation, adapting to various harsh environments;

[0033] The signal acquisition and processing circuit (DSP) 8 is electrically connected to the amplifying and filtering circuit 6 through the signal selection emitter-follower circuit 7, and the amplifying and filtering circuit 6 is electrically connected to the above-mentioned attenuation and isolation circuit 5. If AC power is output by the AC power transformer, the rectifier bridge and the signal sampling circuit convert the AC power into DC power and transmit it to the power circuit. If DC power is output by the DC power supply, the rectifier bridge and the signal sampling circuit directly transmit the DC power to the power circuit, and the power circuit supplies power to the signal acquisition and processing circuit, the signal selection emitter-follower circuit and the amplifying and filtering circuit; the rectifier bridge and the signal sampling circuit convert the collected analog signal into a digital signal, and the digital signal is sent to each channel of the signal selection emitter-follower circuit through the attenuation and isolation circuit and the amplifying and filtering circuit. The signal acquisition and processing circuit controls whether each channel of the signal selection emitter-follower circuit is conductive, and receives the digital signal transmitted from the conductive channel.

[0034] The amplification and filtering circuit uses, but is not limited to, the AD8229HDZ from Analog Devices. The AD8229HDZ is an ultra-low-noise instrumentation amplifier used to measure small signals under large common-mode voltages and high temperatures. The AD8229HDZ's design architecture can compensate for low VBE voltages at high temperatures. A dielectric isolation process is used to prevent leakage current at high temperatures. This device offers industry-leading 1nV / √Hz input noise performance, making it one of the fastest instrumentation amplifiers currently available. Using a current-feedback architecture, it provides high bandwidth at high gains. The AD8229HDZ has a high common-mode rejection ratio (CMRR), preventing interference signals from disrupting data acquisition. At temperatures up to 230°C, the AD8229HDZ maintains excellent distortion performance, making it suitable for demanding applications such as vibration analysis, downhole instrumentation, and data acquisition in harsh environments.

[0035] The signal selection emitter-follower circuit improves signal drive capability and anti-interference capabilities. The signal acquisition and processing circuit (DSP) controls the conduction switches of each channel in the signal selection emitter-follower circuit. After the conduction, the digital signal of each channel is sent to the signal acquisition and processing circuit. The signal acquisition and processing circuit (DSP) receives the digital signal via SPI, determines whether it is powered by a cable or a DC power supply (battery short), and switches to the corresponding cable-type or direct-push logging communication protocol.

[0036] like Figure 2 As shown, the text in this paragraph is marked only for Figure 2 , not related to other figures. Terminal 1 of the rectifier bridge and signal sampling circuit is electrically connected to the positive end of diode V2 and the negative end of diode V3, terminal 2 is electrically connected to the positive end of diode V1 and the negative end of diode V4, terminal 3 is electrically connected to the positive end of diode V6, terminal 4 is electrically connected to the positive end of diode V3, the positive end of diode V4, the negative end of polarity capacitor C1, the negative end of polarity capacitor C2, capacitor C3, terminal 8, terminal 9, terminal 5 is electrically connected to the negative end of diode V1, the negative end of diode V2, the positive end of diode V5, the positive end of polarity capacitor C1, and the positive end of polarity capacitor C 2, one end of the inductor L1 is electrically connected to the negative end of the diode V5, the negative end of the diode V6, and one end of the capacitor C3. The other end of the inductor L1 is electrically connected to the wiring terminal 6 and the wiring terminal 7. The wiring terminal 8 is electrically connected to the positive end of the diode V3, the positive end of the diode V4, the negative end of the polarity capacitor C1, the negative end of the polarity capacitor C2, the capacitor C3, the wiring terminal 4, and the wiring terminal 9. The wiring terminal 9 is electrically connected to the positive end of the diode V3, the positive end of the diode V4, the negative end of the polarity capacitor C1, the negative end of the polarity capacitor C2, the capacitor C3, the wiring terminal 4, and the wiring terminal 8.

[0037] like Figure 3 As shown, the markup in this paragraph applies only to Figure 3, not related to other figures. In the power supply circuit, the first pin of the power module D1 is connected to terminal 1, the second pin of the power module D1 is connected to terminal 2, the third pin of the power module D1 is connected to the second pin of the filter module D3, the fourth pin of the power module D1 is left floating, the fifth pin of the power module D1 is connected to the first pin of the filter module D3, the first pin of the power module D2 is connected to terminal 3, the second pin of the power module D2 is connected to terminal 4, the third pin of the power module D2 is connected to the fourth pin of the filter module D3, the fourth pin of the power module D2 is left floating, the fifth pin of the power module D2 is connected to the third pin of the filter module D3, the fifth pin of the filter module D3 is connected to terminal 5, and is electrically connected to the positive end of the capacitor C1 and the polarity capacitor C3, the sixth pin of the filter module D3 is connected to terminal 6, and is electrically connected to the negative end of the capacitor C1 and the polarity capacitor C3, the seventh pin of the filter module D3 is connected to terminal 7, and is electrically connected to the positive end of the capacitor C2 and the polarity capacitor C4. The 8th pin of the filter module D3 is connected to the terminal 8 and is electrically connected to the negative end of the capacitor C2 and the polarity capacitor C4. The red wire of the power module N1 is connected to the terminal 9, the black wire of the power module N1 is connected to the terminal 10, the yellow wire of the power module N1 is suspended, the white wire of the power module N1 is connected to the 1st pin of the filter module D4, the brown wire of the power module N1 is connected to the 2nd pin of the filter module D4, the blue wire of the power module N1 is connected to the 3rd pin of the filter module D4, the 4th pin of the filter module D4 is suspended, the 5th pin of the filter module D4 is connected to the terminal 11 and is electrically connected to the positive end of the capacitor C5 and the polarity capacitor C7, the 6th pin of the filter module D4 is connected to the terminal 12 and is electrically connected to the negative end of the capacitor C6 and the polarity capacitor C8, the 7th pin of the filter module D4 is connected to the terminal 13 and is connected to the negative end of the capacitor C5, the capacitor C6, the polarity capacitor C7 and the positive end of the polarity capacitor C8, and the 8th pin of the filter module D4 is suspended.

[0038] like Figure 4 As shown, the markup in this paragraph applies only to Figure 4, not related to other figures. The 1st pin of the integrated circuit N1 of the attenuation isolation circuit is connected to the +12V power supply and one end of the capacitor C5. The 2nd pin of the integrated circuit N1 is connected to one end of the capacitor C4, one end of the capacitor C5, one end of the capacitor C6, and is electrically connected to the analog ground AGND. The 3rd pin of the integrated circuit N1 is connected to one end of the capacitor C4. The 4th and 5th pins of the integrated circuit N1 are left floating. The 6th pin of the integrated circuit N1 is electrically connected to one end of the resistor R5. The 7th pin of the integrated circuit N1 is electrically connected to one end of the resistor R6. The 8th pin of the integrated circuit N1 is electrically connected to the analog ground AGND. The 9th pin of the integrated circuit N1 is electrically connected to one end of the resistor R4 and one end of the capacitor C3. The 10th pin of the integrated circuit N1 is electrically connected to the 11th pin of the integrated circuit N1. The 12th pin of the integrated circuit N1 is electrically connected to one end of the resistor R3, one end of the resistor R4, and one end of the capacitor C3. The ends are electrically connected, the 13th pin of the integrated circuit N1 is floating, the 14th pin of the integrated circuit N1 is electrically connected to one end of the capacitor C2, the 15th pin of the integrated circuit N1 is electrically connected to the positive end of the diode V1, one end of the capacitor C1, and the wiring terminal 2, the 16th pin of the integrated circuit N1 is electrically connected to the emitter electrode of the transistor Q1 and one end of the capacitor C1, the base of the transistor Q1 is electrically connected to one end of the resistor R2 and the negative end of the diode V1, the collector of the transistor Q1 is electrically connected to one end of the resistor R1 and one end of the resistor R2, the wiring terminal 1 is electrically connected to one end of the resistor R1, the wiring terminal 2 is electrically connected to the positive end of the diode V1, one end of the capacitor C1, and one end of the capacitor C2, the wiring terminal 3 is electrically connected to one end of the resistor R3, the wiring terminal 4 is electrically connected to one end of the capacitor C3, and the wiring terminal 5 is electrically connected to one end of the resistor R6 and one end of the capacitor C6.

[0039] like Figure 5 As shown, the markup in this paragraph applies only to Figure 5 , which is unrelated to the other figures. Pins 1-20 of the homemade module D1 of the signal acquisition and processing circuit are left floating, pin 21 is electrically connected to terminal 12, pin 22 is electrically connected to terminal 11, pin 23 is left floating, pin 24 is electrically connected to terminal 10, pin 25 is electrically connected to terminal 9, pin 26 is left floating, pin 27 is electrically connected to terminal 8, pins 28-32 are left floating, pin 33 is electrically connected to terminal 7, pin 34 is electrically connected to terminal 6, pin 35 is electrically connected to terminal 5, pin 36 is electrically connected to terminal 4, pin 37 is electrically connected to terminal 3, pin 38 is electrically connected to terminal 2, and pin 39 is electrically connected to terminal 1.

[0040] like Figure 6 As shown, the markup in this paragraph applies only to Figure 6, not related to other figures. The first pin of the integrated circuit N1 of the signal selection emitter-follower circuit is electrically connected to the terminal 7, the second pin of the integrated circuit N1 is electrically connected to one end of the resistor R1, the fifth pin of the integrated circuit N1, the sixth pin of the integrated circuit N1, and the analog ground AGND, the third pin of the integrated circuit N1 is electrically connected to the analog ground AGND, the fourth pin of the integrated circuit N1 is electrically connected to the terminal 8, the fifth pin of the integrated circuit N1 is electrically connected to one end of the resistor R1, the second pin of the integrated circuit N1, the sixth pin of the integrated circuit N1, and the analog ground AGND, the sixth pin of the integrated circuit N1 is electrically connected to one end of the resistor R1, the second pin of the integrated circuit N1, the fifth pin of the integrated circuit N1, and the analog ground AGND, the seventh pin of the integrated circuit N1 is floating, the eighth pin of the integrated circuit N1 is electrically connected to the terminal 5, the ninth pin of the integrated circuit N1 is electrically connected to the terminal 4, the tenth pin of the integrated circuit N1 is electrically connected to the terminal 3, and the integrated circuit Pin 11 of circuit N1 is electrically connected to terminal 2, pin 12 of integrated circuit N1 is electrically connected to one end of resistor R1 and pin 3 of integrated circuit N2, pin 13 of integrated circuit N1 is electrically connected to terminal 1, pin 14 of integrated circuit N1 is electrically connected to a +12V power supply, pin 15 of integrated circuit N1 is electrically connected to a -12V power supply, pin 16 of integrated circuit N1 is electrically connected to terminal 6, pin 1 of integrated circuit N2 is left floating, pin 2 of integrated circuit N2 is electrically connected to pin 6 of integrated circuit N2 and terminal 9, pin 3 of integrated circuit N2 is electrically connected to one end of resistor R1 and pin 12 of integrated circuit N1, pin 4 of integrated circuit N2 is electrically connected to a -12V power supply, pin 5 of integrated circuit N2 is left floating, pin 6 of integrated circuit N2 is electrically connected to pin 2 of integrated circuit N2 and terminal 9, and pin 7 of integrated circuit N2 is electrically connected to the +12V power supply.

[0041] like Figure 7 As shown, the markup in this paragraph applies only to Figure 7, not related to other figures. The first pin of the integrated circuit N1 of the amplifying and filtering circuit is electrically connected to one end of the resistor R1 and one end of the resistor R3. The second pin of the integrated circuit N1 is electrically connected to one end of the resistor R5 and one end of the resistor R6*. The third pin of the integrated circuit N1 is electrically connected to one end of the resistor R5 and one end of the resistor R6*. The fourth pin of the integrated circuit N1 is electrically connected to one end of the resistor R2 and one end of the resistor R4. The fifth pin of the integrated circuit N1 is electrically connected to one end of the capacitor C2 and a -12V power supply. The sixth pin of the integrated circuit N1 is electrically connected to one end of the capacitor C2 and analog ground AGND. The seventh pin of the integrated circuit N1 is electrically connected to one end of the resistor R7. The eighth pin of the integrated circuit N1 is electrically connected to one end of the capacitor C1 and a +12V power supply. The first pin of the integrated circuit N2 is floating. The second pin of the integrated circuit N2 is electrically connected to one end of the resistor R9, one end of the capacitor C3, test point TP2, and the sixth pin of the integrated circuit N2. The third pin of the integrated circuit N2 is electrically connected to the resistor R8 One end of the integrated circuit N2 and one end of the capacitor C4 are electrically connected, the fourth pin of the integrated circuit N2 and one end of the capacitor C6 and the -12 V power supply are electrically connected, the fifth pin of the integrated circuit N2 is floating, the sixth pin of the integrated circuit N2 and one end of the resistor R9, one end of the capacitor C3, the test point TP2, and the second pin of the integrated circuit N2 are electrically connected, the seventh pin of the integrated circuit N2 and the +12 V power supply are electrically connected, the eighth pin of the integrated circuit N2 is floating, the test point TP1 and one end of the resistor R7, one end of the resistor R8, and one end of the capacitor C3 are electrically connected, the test point TP2 and one end of the resistor R9, one end of the capacitor C3, the second pin of the integrated circuit N2, and the sixth pin of the integrated circuit N2 are electrically connected, the wiring terminal 1 and one end of the resistor R1 are electrically connected, the wiring terminal 2 and one end of the resistor R2 are electrically connected, the wiring terminal 3 and one end of the resistor R9 are electrically connected, and one end of the resistor R3, one end of the resistor R4, one end of the capacitor C4, one end of the capacitor C5, and one end of the capacitor C6 are connected to the analog ground AGND.

[0042] This embodiment also discloses a control system that utilizes the aforementioned switching circuit. The signal acquisition and processing circuit controls whether each channel of the signal-selecting emitter-follower circuit is conductive, receives digital signals transmitted from the conductive channels, and determines whether power is supplied by a cable through an AC power transformer or a DC power supply. If power is supplied by a cable, the cable logging communication protocol is adopted; if power is supplied by a DC power supply, the direct-push logging communication protocol is adopted. Specifically, if power is supplied by a cable, a 1M CAN bus configuration is activated; if power is supplied by a DC power supply, a 500K CAN bus configuration is activated.

Claims

1. A cable and direct-drive dual-mode power switching circuit, characterized in that: It includes an AC power transformer, a DC power supply, a power supply circuit and an attenuation isolation circuit electrically connected to the rectifier bridge and the signal sampling circuit. The signal acquisition and processing circuit is electrically connected to the amplification and filtering circuit through the signal selection emitter-follower circuit, and the amplification and filtering circuit is electrically connected to the above-mentioned attenuation isolation circuit; if AC power is output by the AC power transformer, the rectifier bridge and the signal sampling circuit convert the AC power into DC power and transmit it to the power supply circuit; if DC power is output by the DC power supply, the rectifier bridge and the signal sampling circuit directly transmit the DC power to the power supply circuit, and the power supply circuit supplies power to the signal acquisition and processing circuit, the signal selection emitter-follower circuit and the amplification and filtering circuit; the rectifier bridge and the signal sampling circuit convert the collected analog signal into a digital signal, and the digital signal is sent to each channel of the signal selection emitter-follower circuit through the attenuation isolation circuit and the amplification and filtering circuit. The signal acquisition and processing circuit controls whether each channel of the signal selection emitter-follower circuit is conductive, and receives the digital signal transmitted from the conductive channel.

2. The cable and direct-drive dual-mode power switching circuit according to claim 1, characterized in that: The DC power supply is a battery short section.

3. The cable and direct-drive dual-mode power switching circuit according to claim 1, characterized in that: The connection terminal 1 of the rectifier bridge and the signal sampling circuit is electrically connected to the positive end of the diode V2 and the negative end of the diode V3, the connection terminal 2 is electrically connected to the positive end of the diode V1 and the negative end of the diode V4, the connection terminal 3 is electrically connected to the positive end of the diode V6, the connection terminal 4 is electrically connected to the positive end of the diode V3, the positive end of the diode V4, the negative end of the polarity capacitor C1, the negative end of the polarity capacitor C2, the capacitor C3, the connection terminal 8, the connection terminal 9, the connection terminal 5 is electrically connected to the negative end of the diode V1, the negative end of the diode V2, the positive end of the diode V5, the positive end of the polarity capacitor C1, and the polarity capacitor C 2, one end of the inductor L1 is electrically connected to the negative end of the diode V5, the negative end of the diode V6, and one end of the capacitor C3. The other end of the inductor L1 is electrically connected to the wiring terminal 6 and the wiring terminal 7. The wiring terminal 8 is electrically connected to the positive end of the diode V3, the positive end of the diode V4, the negative end of the polarity capacitor C1, the negative end of the polarity capacitor C2, the capacitor C3, the wiring terminal 4, and the wiring terminal 9. The wiring terminal 9 is electrically connected to the positive end of the diode V3, the positive end of the diode V4, the negative end of the polarity capacitor C1, the negative end of the polarity capacitor C2, the capacitor C3, the wiring terminal 4, and the wiring terminal 8.

4. The cable and direct-drive dual-mode power switching circuit according to claim 1, characterized in that: The first pin of the power module D1 of the power supply circuit is connected to terminal 1, the second pin of the power module D1 is connected to terminal 2, the third pin of the power module D1 is connected to the second pin of the filter module D3, the fourth pin of the power module D1 is left floating, the fifth pin of the power module D1 is connected to the first pin of the filter module D3, the first pin of the power module D2 is connected to terminal 3, the second pin of the power module D2 is connected to terminal 4, the third pin of the power module D2 is connected to the fourth pin of the filter module D3, the fourth pin of the power module D2 is left floating, the fifth pin of the power module D2 is connected to the third pin of the filter module D3, the fifth pin of the filter module D3 is connected to terminal 5, and is electrically connected to the positive end of the capacitor C1 and the polarity capacitor C3, the sixth pin of the filter module D3 is connected to terminal 6, and is electrically connected to the negative end of the capacitor C1 and the polarity capacitor C3, the seventh pin of the filter module D3 is connected to terminal 7, and is electrically connected to the positive end of the capacitor C2 and the polarity capacitor C4. The 8th pin of the filter module D3 is connected to the terminal 8 and is electrically connected to the negative end of the capacitor C2 and the polarity capacitor C4. The red wire of the power module N1 is connected to the terminal 9, the black wire of the power module N1 is connected to the terminal 10, the yellow wire of the power module N1 is suspended, the white wire of the power module N1 is connected to the 1st pin of the filter module D4, the brown wire of the power module N1 is connected to the 2nd pin of the filter module D4, the blue wire of the power module N1 is connected to the 3rd pin of the filter module D4, the 4th pin of the filter module D4 is suspended, the 5th pin of the filter module D4 is connected to the terminal 11 and is electrically connected to the positive end of the capacitor C5 and the polarity capacitor C7, the 6th pin of the filter module D4 is connected to the terminal 12 and is electrically connected to the negative end of the capacitor C6 and the polarity capacitor C8, the 7th pin of the filter module D4 is connected to the terminal 13 and is connected to the negative end of the capacitor C5, the capacitor C6, the polarity capacitor C7 and the positive end of the polarity capacitor C8, and the 8th pin of the filter module D4 is suspended.

5. The cable and direct-drive dual-mode power switching circuit according to claim 1, characterized in that: The first pin of the integrated circuit N1 of the attenuation isolation circuit is connected to the +12V power supply and one end of the capacitor C5, the second pin of the integrated circuit N1 is connected to one end of the capacitor C4, one end of the capacitor C5, one end of the capacitor C6, and is electrically connected to the analog ground AGND, the third pin of the integrated circuit N1 is connected to one end of the capacitor C4, the fourth pin and the fifth pin of the integrated circuit N1 are floating, the sixth pin of the integrated circuit N1 is electrically connected to one end of the resistor R5, the seventh pin of the integrated circuit N1 is electrically connected to one end of the resistor R6, the eighth pin of the integrated circuit N1 is electrically connected to the analog ground AGND, the ninth pin of the integrated circuit N1 is electrically connected to one end of the resistor R4 and one end of the capacitor C3, the tenth pin of the integrated circuit N1 is electrically connected to the eleventh pin of the integrated circuit N1, the twelfth pin of the integrated circuit N1 is electrically connected to one end of the resistor R3, one end of the resistor R4, and one end of the capacitor C3. The ends are electrically connected, the 13th pin of the integrated circuit N1 is floating, the 14th pin of the integrated circuit N1 is electrically connected to one end of the capacitor C2, the 15th pin of the integrated circuit N1 is electrically connected to the positive end of the diode V1, one end of the capacitor C1, and the wiring terminal 2, the 16th pin of the integrated circuit N1 is electrically connected to the emitter electrode of the transistor Q1 and one end of the capacitor C1, the base of the transistor Q1 is electrically connected to one end of the resistor R2 and the negative end of the diode V1, the collector of the transistor Q1 is electrically connected to one end of the resistor R1 and one end of the resistor R2, the wiring terminal 1 is electrically connected to one end of the resistor R1, the wiring terminal 2 is electrically connected to the positive end of the diode V1, one end of the capacitor C1, and one end of the capacitor C2, the wiring terminal 3 is electrically connected to one end of the resistor R3, the wiring terminal 4 is electrically connected to one end of the capacitor C3, and the wiring terminal 5 is electrically connected to one end of the resistor R6 and one end of the capacitor C6.

6. The cable and direct-drive dual-mode power switching circuit according to claim 1, characterized in that: Pins 1-20 of the homemade module D1 of the signal acquisition and processing circuit are floating, pin 21 is electrically connected to terminal 12, pin 22 is electrically connected to terminal 11, pin 23 is floating, pin 24 is electrically connected to terminal 10, pin 25 is electrically connected to terminal 9, pin 26 is floating, pin 27 is electrically connected to terminal 8, pins 28-32 are floating, pin 33 is electrically connected to terminal 7, pin 34 is electrically connected to terminal 6, pin 35 is electrically connected to terminal 5, pin 36 is electrically connected to terminal 4, pin 37 is electrically connected to terminal 3, pin 38 is electrically connected to terminal 2, and pin 39 is electrically connected to terminal 1.

7. The cable and direct-drive dual-mode power switching circuit according to claim 1, characterized in that: The first pin of the integrated circuit N1 of the signal selection emitter-follower circuit is electrically connected to the terminal 7, the second pin of the integrated circuit N1 is electrically connected to one end of the resistor R1, the fifth pin of the integrated circuit N1, the sixth pin of the integrated circuit N1, and the analog ground AGND, the third pin of the integrated circuit N1 is electrically connected to the analog ground AGND, the fourth pin of the integrated circuit N1 is electrically connected to the terminal 8, the fifth pin of the integrated circuit N1 is electrically connected to one end of the resistor R1, the second pin of the integrated circuit N1, the sixth pin of the integrated circuit N1, and the analog ground AGND, the sixth pin of the integrated circuit N1 is electrically connected to one end of the resistor R1, the second pin of the integrated circuit N1, the fifth pin of the integrated circuit N1, and the analog ground AGND, the seventh pin of the integrated circuit N1 is floating, the eighth pin of the integrated circuit N1 is electrically connected to the terminal 5, the ninth pin of the integrated circuit N1 is electrically connected to the terminal 4, the tenth pin of the integrated circuit N1 is electrically connected to the terminal 3, and the integrated circuit Pin 11 of circuit N1 is electrically connected to terminal 2, pin 12 of integrated circuit N1 is electrically connected to one end of resistor R1 and pin 3 of integrated circuit N2, pin 13 of integrated circuit N1 is electrically connected to terminal 1, pin 14 of integrated circuit N1 is electrically connected to a +12V power supply, pin 15 of integrated circuit N1 is electrically connected to a -12V power supply, pin 16 of integrated circuit N1 is electrically connected to terminal 6, pin 1 of integrated circuit N2 is left floating, pin 2 of integrated circuit N2 is electrically connected to pin 6 of integrated circuit N2 and terminal 9, pin 3 of integrated circuit N2 is electrically connected to one end of resistor R1 and pin 12 of integrated circuit N1, pin 4 of integrated circuit N2 is electrically connected to a -12V power supply, pin 5 of integrated circuit N2 is left floating, pin 6 of integrated circuit N2 is electrically connected to pin 2 of integrated circuit N2 and terminal 9, and pin 7 of integrated circuit N2 is electrically connected to the +12V power supply.

8. The cable and direct-drive dual-mode power switching circuit according to claim 1, characterized in that: The first pin of the integrated circuit N1 of the amplifying and filtering circuit is electrically connected to one end of the resistor R1 and one end of the resistor R3, the second pin of the integrated circuit N1 is electrically connected to one end of the resistor R5 and one end of the resistor R6*, the third pin of the integrated circuit N1 is electrically connected to one end of the resistor R5 and one end of the resistor R6*, the fourth pin of the integrated circuit N1 is electrically connected to one end of the resistor R2 and one end of the resistor R4, the fifth pin of the integrated circuit N1 is electrically connected to one end of the capacitor C2 and a -12V power supply, the sixth pin of the integrated circuit N1 is electrically connected to one end of the capacitor C2 and an analog ground AGND, the seventh pin of the integrated circuit N1 is electrically connected to one end of the resistor R7, the eighth pin of the integrated circuit N1 is electrically connected to one end of the capacitor C1 and a +12V power supply, the first pin of the integrated circuit N2 is floating, the second pin of the integrated circuit N2 is electrically connected to one end of the resistor R9, one end of the capacitor C3, the test point TP2, and the sixth pin of the integrated circuit N2, and the third pin of the integrated circuit N2 is electrically connected to the resistor R8 One end of the integrated circuit N2 and one end of the capacitor C4 are electrically connected, the fourth pin of the integrated circuit N2 and one end of the capacitor C6 and the -12 V power supply are electrically connected, the fifth pin of the integrated circuit N2 is floating, the sixth pin of the integrated circuit N2 and one end of the resistor R9, one end of the capacitor C3, the test point TP2, and the second pin of the integrated circuit N2 are electrically connected, the seventh pin of the integrated circuit N2 and the +12 V power supply are electrically connected, the eighth pin of the integrated circuit N2 is floating, the test point TP1 and one end of the resistor R7, one end of the resistor R8, and one end of the capacitor C3 are electrically connected, the test point TP2 and one end of the resistor R9, one end of the capacitor C3, the second pin of the integrated circuit N2, and the sixth pin of the integrated circuit N2 are electrically connected, the wiring terminal 1 and one end of the resistor R1 are electrically connected, the wiring terminal 2 and one end of the resistor R2 are electrically connected, the wiring terminal 3 and one end of the resistor R9 are electrically connected, and one end of the resistor R3, one end of the resistor R4, one end of the capacitor C4, one end of the capacitor C5, and one end of the capacitor C6 are connected to the analog ground AGND.

9. A control system using the cable and direct-drive dual-mode power switching circuit according to claim 1, characterized in that: The signal acquisition and processing circuit controls whether the channels of the signal selection emitter-follower circuit are turned on, and receives the digital signals transmitted from the turned-on channels to determine whether the power is supplied by the cable through the AC power transformer or by the DC power supply. If the power is supplied by the cable, the cable logging communication protocol is adopted; if the power is supplied by the DC power supply, the direct-push logging communication protocol is adopted.

10. The control system according to claim 9, characterized in that: If it is powered by a cable, the 1M communication rate CAN bus configuration is started. If it is powered by a DC power supply, the 500K communication rate CAN bus configuration is started.

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