Integrated time difference method ultrasonic current meter, control circuit and assembly

Abstract

The utility model relates to an integrated time-difference-method ultrasonic current meter, a control circuit and an assembly. The integrated time-difference-method ultrasonic current meter comprises an outer shell, the outer shell is provided with an inner cavity part; a circuit board is arranged in the inner cavity part; a processor MCU and a control circuit are arranged on the circuit board; a probe part is arranged on the outer shell; and the processor MCU is electrically connected with the probe part through the control circuit. The device is reasonable in design, compact in structure and convenient to use.

Description

Technical Field

[0001] The utility model relates to an integrated time-difference ultrasonic flowmeter control circuit and components, in particular to a time-difference ultrasonic flowmeter. Background Art

[0002] Existing ultrasonic flow meters, such as the improved ultrasonic transducer patented by the applicant in CN206876233U, are used to install a probe for signal acquisition. The acquired signal is then output to a processing module board on the shore via a cable. The processing module processes the signal to form river flow velocity information.

[0003] The applicant discovered that there are problems with this type of structure, because such equipment is generally stored in the wild, and the flow rate information it transmits can be easily intercepted, resulting in the leakage of national hydrological information; the real real-time flow rate information at various locations needs to be transmitted to the processing module via cables, which is prone to technical problems such as signal interference or signal leakage, and when calculating the flow rate, the signal transmission time is delayed due to the connection cable between the processing module and the transducer, and the processing module cannot accurately calculate the exact transmission time of ultrasound in the water. Utility Model Content

[0004] The technical problem to be solved by the utility model is generally to provide an integrated time-difference ultrasonic flow meter.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is:

[0006] In order to realize integrated installation, reduce signal interference or loss caused by cables, and ensure data security, an integrated time-difference ultrasonic flowmeter is used, comprising an outer shell; the outer shell has an inner cavity;

[0007] A circuit board is provided in the inner cavity; a processor MCU and a control circuit are provided on the circuit board;

[0008] A probe portion is provided on the outer shell;

[0009] The processor MCU is electrically connected to the probe part through the control circuit.

[0010] As a further improvement of the above technical solution:

[0011] In order to achieve reasonable installation, the outer shell has a front stop and a rear stop located on both sides of the inner cavity;

[0012] The probe part is arranged on the front stop;

[0013] A cover portion is provided at the rear stop;

[0014] A nut portion is provided on the cover portion for connecting the cable;

[0015] In order to achieve flow rate output only or hidden code output and reduce the output of flow information, the processor MCU is connected to the background wirelessly or wired.

[0016] In order to install various components in a limited space, the circuit part is arranged in layers and at intervals. Connectors are provided in the inner cavity for mounting the circuit board on the outer shell.

[0017] The circuit board at least includes a circuit board A and a circuit portion B that are arranged in layers and at intervals;

[0018] The circuit board includes a circuit board A and a circuit part B;

[0019] The connecting member includes a hexagonal prism A and a hexagonal prism B of the corresponding circuit board A and circuit portion B;

[0020] In order to achieve fixed installation, the hexagonal prism A and the hexagonal prism B have the same structure; screw holes and stud heads that can be threaded are respectively provided at both ends of the hexagonal prism A and the hexagonal prism B;

[0021] A step portion is provided at the root of the stud head;

[0022] The circuit board A is clamped and fixed by the step portion of the hexagonal prism B and the bottom end of the circuit board A;

[0023] In order to avoid the circular shape being difficult to install and place, the outer side wall of the outer shell has a flat portion.

[0024] As a further improvement, in order to optimize the control, the control circuit includes a light-controlled solid-state relay U1 and a light-controlled solid-state relay U2;

[0025] In the light-controlled solid-state relay U1,

[0026] The light-controlled solid-state relay U1_6 is connected to the VDD terminal of the probe;

[0027] The light-controlled solid-state relay U1_4 and the light-controlled solid-state relay U2_6 are connected to the connection terminal JP1 of the probe;

[0028] The light-controlled solid-state relay U1_1 is connected to the power supply circuit;

[0029] The light-controlled solid-state relay U1_2 is connected to the drain of the MOS tube Q1;

[0030] The source of the MOS tube Q1 is grounded, and the gate of the MOS tube Q1 is connected to the processor MCU through the excitation circuit control signal PowSend;

[0031] A gate current limiting resistor R2 is provided on the excitation circuit control signal PowSend; the gate of the MOS tube Q1 is grounded;

[0032] In the light-controlled solid-state relay U2,

[0033] The light-controlled solid-state relay U2_4 is connected to the Signal_in terminal of the processor MCU receiving circuit.

[0034] The light-controlled solid-state relay U2_1 is connected to the power supply circuit;

[0035] The light-controlled solid-state relay U2_2 is connected to the drain of the MOS tube Q2;

[0036] The source of MOS tube Q2 is grounded, and the gate of MOS tube Q2 controls PowRev by receiving signals to connect to the processor MCU;

[0037] A gate current limiting resistor R6 is provided on the receiving signal control PowRev; the gate of the MOS tube Q2 is grounded.

[0038] As a power supply improvement, the circuit board is electrically connected to the power supply circuit;

[0039] It is preferred that the power supply circuit includes a power supply and a transformer electrically connected to the power supply, for converting the input voltage into a power supply VCC3v3; the power supply includes mains electricity and / or a battery pack;

[0040] The RC filter module includes a capacitor C1 and a resistor R5 connected in parallel;

[0041] An RC filter module and a TVS diode D1 are connected in parallel between the two input terminals of the connection terminal JP1.

[0042] As a separate protection, a control circuit of an integrated time-of-day ultrasonic flowmeter, the control circuit includes a light-controlled solid-state relay U1 and a light-controlled solid-state relay U2;

[0043] In the light-controlled solid-state relay U1,

[0044] The light-controlled solid-state relay U1_6 is used to connect the VDD terminal of the probe;

[0045] The light-controlled solid-state relay U1_4 and the light-controlled solid-state relay U2_6 are used to connect to the connection terminal JP1 of the probe;

[0046] The light-controlled solid-state relay U1_2 is connected to the drain of the MOS tube Q1;

[0047] The source of the MOS tube Q1 is grounded, and the gate of the MOS tube Q1 is used to connect to the processor MCU through the excitation circuit control signal PowSend; the processor MCU adopts existing technologies such as STC15F104W-35I-SOP or STM32F103RCT6.

[0048] In the light-controlled solid-state relay U2,

[0049] The light-controlled solid-state relay U2_4 is connected to the Signal_in terminal of the processor MCU receiving circuit.

[0050] The light-controlled solid-state relay U2_2 is connected to the drain of the MOS tube Q2;

[0051] The source of the MOS tube Q2 is grounded, and the gate of the MOS tube Q2 is connected to the processor MCU by receiving a signal to control PowRev.

[0052] As a further improvement of the above technical solution:

[0053] The light-controlled solid-state relay U1_1 is connected to the power supply circuit through the current-limiting resistor R1;

[0054] A gate current limiting resistor R2 is provided on the excitation circuit control signal PowSend;

[0055] The gate of MOS tube Q1 is grounded through the gate grounding resistor R3;

[0056] The light-controlled solid-state relay U2_1 is connected to the power supply circuit through the current-limiting resistor R4;

[0057] A gate current limiting resistor R6 is provided on the receiving signal control PowRev; the gate of the MOS tube Q2 is grounded through a gate grounding resistor R7.

[0058] The circuit board is electrically connected to the power supply circuit;

[0059] The power supply circuit includes a power supply and a transformer electrically connected to the power supply, which is used to convert the input voltage into a power supply VCC3v3; the power supply includes AC power and / or a battery pack;

[0060] The RC filter module includes a capacitor C1 and a resistor R5 connected in parallel;

[0061] An RC filter module and a TVS diode D1 are connected in parallel between the two input terminals of the connection terminal JP1.

[0062] As system protection, a velocity meter assembly includes a master unit and a slave unit that are paired and set up;

[0063] The master and / or slave device adopts the above-mentioned integrated time difference method ultrasonic flow meter.

[0064] As a further improvement of the above technical solution:

[0065] The master and slave units are used to be installed on both sides of the river bank;

[0066] When the host side is in the sending side excitation state, PowSend on the host side is in a high level state, PowRev is in a low level state, MOS tube Q1 is in an on state, MOS tube Q2 is in an off state, VDD is connected to the probe part through the secondary side of the photo-controlled solid-state relay U1, and the probe part is disconnected from Signal_in; the slave side is in the receiving side receiving state, PowSend on the slave side is in a low level state, PowRev is in a high level state, MOS tube Q1 is disconnected, MOS tube Q2 is on, the slave VDD is disconnected from the probe part, and the probe part is connected to Signal_in through the solid-state relay U2.

[0067] The present invention realizes the confidentiality of original data, has a short distance between modules, reduces errors such as delay, reduces interference and data loss, has good anti-interference performance, and has high integration. It can effectively prevent sedimentation through the positioning module and can have a built-in water level sensor.

[0068] As an improvement effect of the circuit part, JP1 is a connection terminal, which is connected to the probe part outward; D1 is a TVS diode, which plays a protective role and can be selected according to the excitation voltage value of the probe part 6; C1 and R5 together form a simple RC filter, which can filter out high-frequency noise; U1 and U2 are light-controlled solid-state relays of the same model, and their voltage resistance value selection is related to the design of the excitation voltage of the probe part 6; the VDD connected to U1_6 is the excitation of the probe part 6, and a high-voltage signal is output by a transformer, etc., and its frequency is consistent with the frequency of the probe part 6; Signal_in connected to U2_4 is the processor MCU receiving circuit. When the probe part 6 receives the signal, it outputs it to the post-processing circuit, and then The stage processing circuit mostly uses DA conversion to realize signal analysis; U1 and U2 switches are controlled by the previous stage circuit, and the power supply is 3.3V for illustration, which is not a limitation. The appropriate power supply can be selected according to the selected solid-state relay; R1 and R4 act as current limiting resistors; Q1 and Q2 are MOS switch tubes; R3 and R7 are gate grounding resistors; R2 and R6 are gate current limiting resistors; PowSend is the excitation circuit control signal, and PowRev is the receiving signal control; a high level can be given in the two working states of the probe part 6 respectively; the utility model has a reasonable design, low cost, durability, safety and reliability, simple operation, time and labor saving, money saving, compact structure and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 It is a schematic diagram of the appearance structure of the utility model.

[0070] Figure 2 It is a schematic diagram of the internal structure of the present utility model.

[0071] Figure 3 It is a schematic diagram of the circuit structure of the utility model.

[0072] Among them: 1. Outer shell; 2. Front stopper; 3. Inner cavity; 4. Rear stopper; 5. Cover plate; 6. Probe; 7. Connector; 8. Circuit board A; 9. Circuit part B; 10. Hexagonal prism A; 11. Hexagonal prism B; 12. Step part; 13. Screw hole part; 14. Nut part; 15. Stud head; 16. Flat part. DETAILED DESCRIPTION

[0073] like Figure 1-3 As shown, the integrated time-difference ultrasonic flowmeter of this embodiment includes improvements in circuit and structure. Specifically, Figure 1 As shown, the integrated transit-time ultrasonic flowmeter of this embodiment includes an outer shell 1, preferably made of stainless steel, preferably circular in structure, so as to increase the installation cavity space, resist corrosion and avoid external signal interference; the outer shell 1 has an inner cavity 3 for installing components;

[0074] As an improvement, a circuit board is provided in the inner cavity 3; a processor MCU and a control circuit are provided on the circuit board; the existing processor MCU and / or control circuit are moved from the shore to the shell, thereby shortening the distance and avoiding information leakage and signal interference.

[0075] A probe portion 6 is provided on the outer shell 1; it is a conventional structure and is used for signal acquisition.

[0076] The processor MCU is electrically connected to the probe part 6 via the control circuit. The probe part 6 is a conventional probe, also called a transducer or a transducer core component.

[0077] As an improvement, the processor MCU is connected to the background for data communication in a wireless or wired manner.

[0078] A water level gauge is provided in the inner cavity portion 3;

[0079] The communication data includes flow rate information collected by the probe 6 and processed by the processor MCU;

[0080] The data information also includes water level information;

[0081] Data information is in plain text or cipher text;

[0082] The background receives data information sent by the processor MCU;

[0083] The outer shell 1 has a front stop 2 and a rear stop 4 located on both sides of the inner cavity 3;

[0084] The probe portion 6 is arranged on the front stop 2;

[0085] A cover plate portion 5 is provided at the rear stop 4 to facilitate installation and positioning, and of course a sealing arrangement is required;

[0086] A nut portion 14 is provided on the cover portion 5 for connecting a cable to realize power supply or data transmission;

[0087] The processor MCU is connected to the background wirelessly or by wire. When batteries are used, the structure is simplified and expansion components such as locators or photovoltaic panels can be installed for optimization.

[0088] A connector 7 is provided in the inner cavity 3 for mounting the circuit board on the outer shell 1 to achieve a fixed connection;

[0089] The circuit board at least includes a circuit board A8 and a circuit portion B9 that are arranged in layers and at intervals; the layer structure is realized, which can effectively utilize space.

[0090] The circuit board includes a circuit board A8 and a circuit portion B9; it can be three-layer or multi-layer.

[0091] The connecting member 7 includes a hexagonal prism A10 and a hexagonal prism B11 of the corresponding circuit board A8 and circuit portion B9;

[0092] The hexagonal prism A10 and the hexagonal prism B11 have the same structure; a screw hole portion 13 and a stud head 15 for threaded connection are respectively provided at both ends of the hexagonal prism A10 and the hexagonal prism B11;

[0093] A step portion 12 is provided at the root of the stud head 15;

[0094] The circuit board A8 is clamped and fixed to the bottom end of the circuit board A8 by the step portion 12 of the hexagonal prism B11. The stud head passes through the through hole on the circuit board and connects with the adjacent screw hole to achieve positioning and fixation.

[0095] The outer side wall of the outer shell 1 has a flat portion 16 for easy placement and installation.

[0096] like Figure 3 As an embodiment used alone or in conjunction with other embodiments, the control circuit of the integrated time-of-flight ultrasonic flowmeter of this embodiment includes a light-controlled solid-state relay U1 and a light-controlled solid-state relay U2; thereby achieving control. Specifically,

[0097] In the light-controlled solid-state relay U1,

[0098] The light-controlled solid-state relay U1_6 is used to connect the probe 6VDD terminal;

[0099] The light-controlled solid-state relay U1_4 and the light-controlled solid-state relay U2_6 are used to connect to the connection terminal JP1 of the probe part 6;

[0100] The light-controlled solid-state relay U1_2 is connected to the drain of the MOS tube Q1;

[0101] The source of the MOS tube Q1 is grounded, and the gate of the MOS tube Q1 is used to connect to the processor MCU through the excitation circuit control signal PowSend;

[0102] In the light-controlled solid-state relay U2,

[0103] The light-controlled solid-state relay U2_4 is connected to the Signal_in terminal of the processor MCU receiving circuit.

[0104] The light-controlled solid-state relay U2_2 is connected to the drain of the MOS tube Q2;

[0105] The source of the MOS tube Q2 is grounded, and the gate of the MOS tube Q2 is connected to the processor MCU by receiving a signal to control PowRev.

[0106] The light-controlled solid-state relay U1_1 is connected to the power supply circuit through the current-limiting resistor R1;

[0107] A gate current limiting resistor R2 is provided on the excitation circuit control signal PowSend;

[0108] The gate of MOS tube Q1 is grounded through the gate grounding resistor R3;

[0109] The light-controlled solid-state relay U2_1 is connected to the power supply circuit through the current-limiting resistor R4;

[0110] A gate current limiting resistor R6 is provided on the receiving signal control PowRev; the gate of the MOS tube Q2 is grounded through a gate grounding resistor R7.

[0111] The circuit board is electrically connected to the power supply circuit;

[0112] The power supply circuit includes a power supply and a transformer electrically connected to the power supply, which is used to convert the input voltage into a power supply VCC3v3; the power supply includes AC power and / or a battery pack;

[0113] The RC filter module includes a capacitor C1 and a resistor R5 connected in parallel;

[0114] An RC filter module and a TVS diode D1 are connected in parallel between the two input terminals of the connection terminal JP1.

[0115] In order to achieve specific use, the velocity meter assembly of this embodiment includes a master device and a slave device that are paired;

[0116] The master and / or slave device adopts the above-mentioned integrated time difference method ultrasonic flow meter.

[0117] The master and slave units are used to be installed on both sides of the river bank;

[0118] When the host side is in the sending side excitation state, PowSend on the host side is in a high level state, PowRev is in a low level state, MOS tube Q1 is in an on state, MOS tube Q2 is in an off state, VDD is connected to the probe part 6 through the secondary side of the light-controlled solid-state relay U1, and the probe part 6 is disconnected from Signal_in; the slave side is in the receiving side receiving state, PowSend on the slave side is in a low level state, PowRev is in a high level state, MOS tube Q1 is disconnected, MOS tube Q2 is on, the slave VDD and the probe part 6 are disconnected, and the probe part 6 is connected to Signal_in through the solid-state relay U2.

[0119] Workflow Description:

[0120] The current meter is installed on both sides of the river bank. When the system starts working, the host side is first in the sending side excitation state. At this time, the host side PowSend is high and PowRev is low, Q1 is turned on and Q2 is turned off. At this time, VDD is connected to the probe part 6 through the secondary side of U1, and the probe part 6 is disconnected from Signal_in; the slave side is in the receiving side receiving state. The slave side PowSend is low and PowRev is high, Q1 is turned off and Q2 is turned on. At this time, the slave VDD is disconnected from the probe part 6, and the probe part 6 is connected to Signal_in through U2.

[0121] After the host excitation and the slave reception are completed, the slave side becomes the excitation side and the host side becomes the receiving side. The circuit operation principle is the same and will not be repeated here.

[0122] Complete the above work process once, and then design a cycle of the above work process as needed.

[0123] The present invention is fully described for the purpose of clearer disclosure, and the prior art will not be listed one by one.

[0124] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may be modified, or some of the technical features thereof may be replaced with equivalents. It is obvious for those skilled in the art to combine multiple technical solutions of the present invention. However, such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated time-difference ultrasonic flow meter, characterized in that: The invention comprises an outer shell (1); the outer shell (1) has an inner cavity (3); A circuit board is arranged in the inner cavity (3); a processor MCU and a control circuit are arranged on the circuit board; A probe portion (6) is provided on the outer shell (1); The processor MCU is electrically connected to the probe part (6) via a control circuit.

2. The integrated time-difference ultrasonic flowmeter according to claim 1, characterized in that: The processor MCU is connected to the background for data communication via wireless or wired means.

3. The integrated time-difference ultrasonic flowmeter according to claim 2, characterized in that: A water level gauge is arranged in the inner cavity (3); The communication data includes flow rate information output by the processor MCU; The data information also includes water level information; Data information is in plain text or cipher text; The outer shell (1) has a front stop (2) and a rear stop (4) located on both sides of the inner cavity (3); The probe part (6) is arranged on the front stop (2); A cover plate portion (5) is provided at the rear stop (4); A nut portion (14) is provided on the cover plate portion (5) for connecting a cable; A connecting piece (7) is provided in the inner cavity (3) for mounting the circuit board on the outer shell (1); The circuit board at least comprises a circuit board A (8) and a circuit portion B (9) which are arranged in layers and at intervals; The circuit board includes a circuit board A (8) and a circuit part B (9); The connecting member (7) includes a hexagonal prism A (10) and a hexagonal prism B (11) corresponding to the circuit board A (8) and the circuit part B (9); The hexagonal prism A (10) and the hexagonal prism B (11) have the same structure; screw holes (13) and stud heads (15) that can be threadedly connected are respectively provided at both ends of the hexagonal prism A (10) and the hexagonal prism B (11); A step portion (12) is provided at the root of the stud head (15); The circuit board A (8) is clamped and fixed to the bottom end of the circuit board A (8) by the step portion (12) of the hexagonal column B (11); The outer side wall of the outer shell (1) has a flat portion (16); The inner cavity part (3) has a positioner.

4. The integrated time-difference ultrasonic flowmeter according to claim 1 or 2, characterized in that: The control circuit includes a light-controlled solid-state relay U1 and a light-controlled solid-state relay U2; In the light-controlled solid-state relay U1, The light-controlled solid-state relay U1_6 is connected to the VDD terminal of the probe part (6); The light-controlled solid-state relay U1_4 and the light-controlled solid-state relay U2_6 are connected to the connection terminal JP1 of the probe part (6); The light-controlled solid-state relay U1_1 is connected to the power supply circuit; The light-controlled solid-state relay U1_2 is connected to the drain of the MOS tube Q1; The source of the MOS tube Q1 is grounded, and the gate of the MOS tube Q1 is connected to the processor MCU through the excitation circuit control signal PowSend; A gate current limiting resistor R2 is provided on the excitation circuit control signal PowSend; the gate of the MOS tube Q1 is grounded; In the light-controlled solid-state relay U2, The light-controlled solid-state relay U2_4 is connected to the Signal_in terminal of the processor MCU receiving circuit. The light-controlled solid-state relay U2_1 is connected to the power supply circuit; The light-controlled solid-state relay U2_2 is connected to the drain of the MOS tube Q2; The source of MOS tube Q2 is grounded, and the gate of MOS tube Q2 controls PowRev to connect to the processor MCU through receiving signals; A gate current limiting resistor R6 is provided on the receiving signal control PowRev; the gate of the MOS tube Q2 is grounded.

5. The integrated transit-time ultrasonic flowmeter according to claim 4, characterized in that: The circuit board is electrically connected to the power supply circuit; The power supply circuit includes a power supply and a transformer electrically connected to the power supply, and is used to convert an input voltage into a power supply VCC3v3; the power supply includes a mains supply and / or a battery pack; The RC filter module includes a capacitor C1 and a resistor R5 connected in parallel; An RC filter module and a TVS diode D1 are connected in parallel between the two input terminals of the connection terminal JP1.

6. A control circuit for an integrated time-difference ultrasonic flowmeter, characterized in that: The control circuit includes a light-controlled solid-state relay U1 and a light-controlled solid-state relay U2; In the light-controlled solid-state relay U1, The light-controlled solid-state relay U1_6 is used to connect the VDD terminal of the probe part (6); The light-controlled solid-state relay U1_4 and the light-controlled solid-state relay U2_6 are used to be commonly connected to the connection terminal JP1 of the probe part (6); The light-controlled solid-state relay U1_2 is connected to the drain of the MOS tube Q1; The source of the MOS tube Q1 is grounded, and the gate of the MOS tube Q1 is used to connect to the processor MCU through the excitation circuit control signal PowSend; In the light-controlled solid-state relay U2, The light-controlled solid-state relay U2_4 is connected to the Signal_in terminal of the processor MCU receiving circuit. The light-controlled solid-state relay U2_2 is connected to the drain of the MOS tube Q2; The source of the MOS tube Q2 is grounded, and the gate of the MOS tube Q2 is connected to the processor MCU by receiving a signal to control PowRev.

7. The control circuit of the integrated time-difference ultrasonic flowmeter according to claim 6 is characterized in that: The light-controlled solid-state relay U1_1 is connected to the power supply circuit through the current-limiting resistor R1; A gate current limiting resistor R2 is provided on the excitation circuit control signal PowSend; The gate of MOS tube Q1 is grounded through gate grounding resistor R3; The light-controlled solid-state relay U2_1 is connected to the power supply circuit through the current-limiting resistor R4; A gate current limiting resistor R6 is provided on the receiving signal control PowRev; the gate of the MOS tube Q2 is grounded through a gate grounding resistor R7.

8. The control circuit of the integrated time-difference ultrasonic flowmeter according to claim 6 is characterized in that: The circuit board is electrically connected to the power supply circuit; The power supply circuit includes a power supply and a transformer electrically connected to the power supply, which is used to convert the input voltage into a power supply VCC3v3; the power supply includes a photovoltaic panel battery, a mains power supply and / or a battery pack; The RC filter module includes a capacitor C1 and a resistor R5 connected in parallel; An RC filter module and a TVS diode D1 are connected in parallel between the two input terminals of the connection terminal JP1.

9. A flow meter assembly, characterized in that: Including the master and slave devices for pairing settings; The host and / or slave uses the integrated time-difference ultrasonic flow meter described in any one of claims 1-5.

10. The flow meter assembly according to claim 9, characterized in that: The master and slave machines are used to be installed on both sides of the river bank; When the host side is in the sending side excitation state, PowSend of the host side is in a high level state, PowRev is in a low level state, MOS tube Q1 is in an on state, MOS tube Q2 is in an off state, VDD is connected to the probe part (6) through the secondary side of the light-controlled solid-state relay U1, and the probe part (6) is in a off state with Signal_in; the slave side is in the receiving side receiving state, PowSend of the slave side is in a low level state, PowRev is in a high level state, MOS tube Q1 is off, MOS tube Q2 is on, the slave VDD is in a off state with the probe part (6), and the probe part (6) is in a connected state with Signal_in through the solid-state relay U2; The background receives data information sent by the processor MCU.

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