A power amplifier automatically varying impedance and method of using the same

Abstract

The application discloses a power amplifier capable of automatically changing impedance and relates to the technical field of power amplifiers.The power amplifier comprises a power amplifier host, a variable resistor is connected to the inside of the power amplifier host, a sliding sheet is connected to the top of the variable resistor, an adjusting module is connected to the inside of the power amplifier host and is located above the sliding sheet.The adjusting module comprises a small linear driver one installed in the inside of the power amplifier host, and the output end of the small linear driver one is connected with a bidirectional screw rod one.The adjusting module is connected, the adjusting module is started, the small linear driver one is controlled to operate, then the bidirectional screw rod one is driven to rotate, the sliding sheet is moved along a guide stick one, the sliding sheet is further driven to slide on the variable resistor, the resistance value is changed, according to the impedance formula, the impedance of the power amplifier can be changed by changing the resistance value, therefore, the power amplifier can automatically change the connected resistance value according to the use requirement, so that the impedance size is changed.

Description

Technical Field

[0001] This invention relates to the field of power amplifier technology, specifically to an automatically variable impedance power amplifier and its usage method. Background Technology

[0002] The purpose of a power amplifier is to increase the power amplitude of the input signal, thereby increasing the power of the input signal to a level that can drive the load of the output device. However, existing power amplifiers cannot automatically change the impedance, which seriously affects the efficiency of the power amplifier.

[0003] The shortcomings of existing postoperative rehabilitation exercise devices are:

[0004] 1. Application document CN114245623A mainly considers how to effectively avoid damage to the power amplifier due to collisions and falling objects, but does not consider how the power amplifier can automatically change its impedance according to usage requirements;

[0005] 2. Patent document CN114725726B mainly considers how to solve the problem of the connecting wire easily detaching from the body and falling off during shaking and vibration in the installation environment, but does not consider how to shield the power amplifier from external electromagnetic interference.

[0006] 3. The application document CN116419555A1 mainly considers how to solve the problem of electromagnetic interference to the power amplifier, but does not consider how to prevent the connection cable and interface from falling off.

[0007] 4. Application document CN114039563A mainly considers how to improve the receiving quality and thus improve the work efficiency of staff, but does not consider how to solve the problem of dust accumulation at the interface due to long-term exposure to the external environment. Summary of the Invention

[0008] The purpose of this invention is to provide an automatically variable impedance power amplifier and its usage method to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: an automatic impedance-changing power amplifier, comprising a power amplifier host, wherein a rheostat is internally connected to the power amplifier host, a slider is connected to the top of the rheostat, and an adjustment module is internally connected to the power amplifier host, and the adjustment module is located above the slider.

[0010] The adjustment module includes a small linear driver installed inside the power amplifier host. The output end of the small linear driver is connected to a bidirectional lead screw. A guide rod is connected inside the power amplifier host and is located above the bidirectional lead screw. Slider plates are connected to the outer surfaces of the guide rod and the bidirectional lead screw, and the slider plates are connected to each other.

[0011] Preferably, the power amplifier host is connected to a shielding cover plate on the top and both sides, the outer surface of the shielding cover plate is connected to an absorption layer, the bottom of the absorption layer is connected to a metal isolation layer, the bottom of the metal isolation layer is connected to a graphene coating, and the graphene coating is used to prevent the shielding cover plate from oxidizing.

[0012] Preferably, the front of the power amplifier host has two sets of sliding grooves, and both the input and output ends of the power amplifier host are provided with BNC connectors. The top and bottom of the outer surface of the BNC connector are provided with fixing grooves, and the inner wall of the fixing groove is connected to a pressure sensor, which is used to detect whether a connection wire is connected.

[0013] Preferably, the amplifier host has an internal fixing module, which includes two sets of small linear drivers installed on the top wall of the amplifier host, with the small linear drivers located on both sides of the sliding groove. The output end of the small linear drivers is connected to a bidirectional lead screw. The top wall of the amplifier host is connected to two sets of guide rods, with the guide rods located between the two sets of small linear drivers. The outer surfaces of the guide rods and the bidirectional lead screws are connected to two sets of arc-shaped clips, with the two sets of arc-shaped clips located above and below the BNC connector, respectively.

[0014] Preferably, the amplifier host has an internal dustproof module connected to it, and the dustproof module is located in front of the fixed module. The dustproof module includes a small linear driver 2 installed on the inner wall of one side of the amplifier host. The output end of the small linear driver 2 is connected to a bidirectional lead screw 2. A guide rod 2 is connected to the inner wall of one side of the amplifier host, and the guide rod 2 is located below the small linear driver 2. A connector is connected to the outer surface of the guide rod 2 and the bidirectional lead screw 2. A dustproof cover is connected to the bottom of the connector, and the dustproof cover is located in front of the BNC connector and inside the sliding groove.

[0015] Preferably, the front of the amplifier host is connected to two sets of handles, and the handles are located on both sides of the sliding groove. The front of the amplifier host is connected to a button control area, and the button control area is located between the two sets of sliding grooves. The front of the amplifier host is connected to a master switch, an adjustment knob, and a display screen, and the display screen is located between the master switch and the adjustment knob, and the display screen is located above the button control area.

[0016] Preferably, the power amplifier host is connected to both the back and top of the amplifier, with the top heat dissipation mesh located behind the shielding cover. The power interface is connected to the back of the power amplifier host and is located on one side of the heat dissipation mesh.

[0017] Preferably, the power amplifier is used as follows:

[0018] S1. Before using the power amplifier, first connect the power cord to the power interface, then press the main switch to start the entire power amplifier, and then press the button control area to open the dustproof module.

[0019] S2. After removing the dust cover, the connecting wire can be installed at the BNC connector, so that the protrusion at the connector engages in the fixing groove. At this time, the protrusion exerts pressure on the pressure sensor, which immediately triggers the corresponding fixing module to lock the connecting wire, preventing the connecting wire from falling off during use.

[0020] S3. After the connecting cable is fixed, input the impedance value in the button control area according to the usage requirements. The power amplifier host will then calculate the impedance value according to the impedance formula: Calculate the required resistance value R, then start the adjustment module to perform automatic adjustment;

[0021] S4. After using the power amplifier, first use the button control area to unlock the fixed module, then rotate the connecting wire in the opposite direction of the connection and pull it out. Next, use the button control area to control the small linear driver two to rotate in the opposite direction, which will drive the bidirectional lead screw two to rotate, thereby causing the dust cover to move along the guide roller two until the dust cover is completely closed to prevent the BNC wiring port from being exposed to the air for a long time and accumulating dust. Then press the main switch again to turn off the power amplifier. Finally, unplug the power cord from the power interface.

[0022] Preferably, step S1 further includes the following steps:

[0023] S11. The small linear actuator II operates, driving the bidirectional lead screw II to rotate, which in turn causes the connector to move along the guide roller II, causing the dust cover to move with the connector, exposing the BNC wiring port for easy wiring.

[0024] Step S2 further includes the following steps:

[0025] S21. The fixed module starts, the small linear driver runs, driving the bidirectional lead screw to rotate, which in turn causes the two sets of arc-shaped clips to move closer to the BNC connector along the guide rod until the BNC connector and the connecting wire are engaged between the two sets of arc-shaped clips.

[0026] Step S3 further includes the following steps:

[0027] S31. The adjustment module is started. The small linear driver runs, which drives the bidirectional lead screw to rotate, causing the slider to slide along the guide rod and slide on the rheostat to change the resistance value to meet the usage requirements.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. This invention is equipped with an adjustment module. When the adjustment module is activated, it controls a small linear actuator to run, which in turn drives a bidirectional lead screw to rotate, causing a slider to move along a guide rod. This causes the slider to slide on a rheostat, changing the resistance value. According to the impedance formula, the impedance of the power amplifier can be changed by changing the resistance value. Therefore, this power amplifier can automatically change the connected resistance value according to the usage requirements in order to change the impedance.

[0030] 2. This invention utilizes a shielding cover, which consists of an absorption layer, a metal isolation layer, and a graphene coating. The absorption layer absorbs external electromagnetic interference, preventing it from affecting the internal circuitry of the power amplifier. The metal isolation layer enhances the strength of the shielding cover and further isolates it from external electromagnetic interference. The graphene coating effectively hinders the diffusion of oxygen atoms in the air, preventing oxidation of the shielding cover and effectively extending its service life. When using this power amplifier, the shielding cover protects the internal circuitry from external electromagnetic interference and reduces the power amplifier's own electromagnetic interference to the outside world.

[0031] 3. This invention connects a fixing module and a pressure sensor. The connector on the connecting line is aligned with the BNC connector and inserted and rotated, causing the protrusion on the connector to engage in the fixing groove. At this time, the protrusion exerts pressure on the pressure sensor, indicating that the connecting line has been connected to the BNC connector. This immediately triggers the fixing module to start, and the small linear actuator operates, driving the bidirectional lead screw to rotate. This causes the two sets of arc-shaped clips to move closer to the BNC connector along the guide rod until the BNC connector and the connecting line are engaged between the two sets of arc-shaped clips. The fixing module is used to fix the connecting line and the BNC connector for a secondary purpose, preventing the connecting line from falling off during use and increasing the stability and firmness of the connection.

[0032] 4. This invention, by connecting a dustproof module, controls the small linear actuator two to rotate in the opposite direction when no connection cable is needed, thereby driving the bidirectional lead screw two to rotate, which in turn causes the dustproof cover to move along the guide rod two until the dustproof cover is completely closed, so that the dustproof cover is in a closed state. The dustproof module is used to prevent the BNC connector from being exposed to the external environment for a long time, which would cause dust to accumulate and thus affect the normal use of the BNC connector. Attached Figure Description

[0033] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0034] Figure 2 This is a three-dimensional structural diagram of the BNC connector of the present invention;

[0035] Figure 3 For the present invention Figure 2 A schematic diagram of the three-dimensional structure of A in the middle;

[0036] Figure 4 This is a schematic diagram of the planar structure of the arc-shaped card component of the present invention;

[0037] Figure 5 This is a schematic cross-sectional view of the dust cover and the small linear actuator assembled according to the present invention;

[0038] Figure 6 This is a rear-view three-dimensional structural diagram of the present invention;

[0039] Figure 7 This is a schematic cross-sectional view of the adjustment module of the present invention;

[0040] Figure 8 This is a schematic cross-sectional view of the shielding cover plate of the present invention;

[0041] Figure 9 This is a system diagram of the present invention.

[0042] In the diagram: 1. Power amplifier main unit; 2. Miniature linear driver 1; 3. Bidirectional lead screw 1; 4. Guide roller 1; 5. Power interface; 6. Rheostat; 7. Handle; 8. Shielding cover; 9. Absorption layer; 10. Metal isolation layer; 11. Graphene coating; 12. BNC connector; 13. Pressure sensor; 14. Sliding groove; 15. Dust cover; 16. Miniature linear driver 2; 17. Bidirectional lead screw 2; 18. Guide roller 2; 19. Button control area; 20. Miniature linear driver 3; 21. Bidirectional lead screw 3; 22. Guide roller 3; 23. Arc-shaped clip; 24. Main switch; 25. Heat dissipation mesh; 26. Adjustment knob; 27. Display screen. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0044] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] Please see Figure 1 and Figure 7 The present invention provides an embodiment of an automatic impedance-changing power amplifier, comprising a power amplifier host 1, wherein a variable resistor 6 is internally connected to the power amplifier host 1, a slider is connected to the top of the variable resistor 6, and an adjustment module is internally connected to the power amplifier host 1, and the adjustment module is located above the slider.

[0047] The adjustment module includes a small linear driver 2 installed inside the power amplifier host 1. The output end of the small linear driver 2 is connected to a bidirectional lead screw 3. A guide rod 4 is connected inside the power amplifier host 1 and is located above the bidirectional lead screw 3. Slider plates are connected to the outer surfaces of the guide rod 4 and the bidirectional lead screw 3, and the slider plates are connected to each other.

[0048] Furthermore, the power amplifier host 1 uses the impedance formula according to the required impedance value: The required resistance value R is calculated, and then the adjustment module is started to control the small linear driver 2 to run. Then, the bidirectional lead screw 3 is rotated, so that the slider moves along the guide rod 4, and then the slider slides on the rheostat 6 to facilitate the change of resistance value. Due to the relationship between resistance and impedance, the impedance of the power amplifier is changed by changing the resistance value to meet the usage requirements.

[0049] Please see Figure 1 , Figure 6 and Figure 8 An embodiment of the present invention provides: an automatic impedance-changing power amplifier, wherein the power amplifier host 1 is connected to a shielding cover plate 8 on the top and both sides, the outer surface of the shielding cover plate 8 is connected to an absorption layer 9, the bottom of the absorption layer 9 is connected to a metal isolation layer 10, the bottom of the metal isolation layer 10 is connected to a graphene coating 11, and the graphene coating 11 is used to prevent the shielding cover plate 8 from oxidizing.

[0050] The front of the power amplifier host 1 is connected to two sets of handles 7, and the handles 7 are located on both sides of the sliding groove 14. The front of the power amplifier host 1 is connected to a button control area 19, and the button control area 19 is located between the two sets of sliding grooves 14. The front of the power amplifier host 1 is connected to a main switch 24, an adjustment knob 26 and a display screen 27, and the display screen 27 is located between the main switch 24 and the adjustment knob 26. The display screen 27 is located above the button control area 19.

[0051] The power amplifier host 1 is connected to both the back and top of a heat dissipation mesh 25, and the heat dissipation mesh 25 on the top is located behind the shielding cover plate 8. The power interface 5 is connected to the back of the power amplifier host 1, and the power interface 5 is located on one side of the heat dissipation mesh 25.

[0052] Furthermore, the shielding cover 8 is composed of an absorption layer 9, a metal isolation layer 10, and a graphene coating 11. The shielding cover 8 is mainly used to shield the external electromagnetic interference to the internal circuit of the power amplifier, while reducing the electromagnetic interference of the power amplifier itself to the outside world. The absorption layer 9 absorbs external electromagnetic interference to prevent it from affecting the internal circuit of the power amplifier host 1. The metal isolation layer 10 enhances the strength of the shielding cover 8 and further isolates the external electromagnetic interference. The graphene coating 11 can effectively hinder the diffusion of oxygen atoms in the air, prevent the shielding cover 8 from oxidizing, and effectively extend the service life of the shielding cover 8.

[0053] When using this power amplifier, first connect the power cord to the power interface 5, then press the main switch 24 to power on the amplifier host 1. The handle 7 facilitates the movement of the amplifier host 1. The operation of the amplifier host 1 can be adjusted and set through the button control area 19. When using the amplifier host 1, the power amplification factor can be adjusted by rotating the adjustment knob 26. The display screen 27 displays the corresponding power amplification parameters or images for easy observation by the user. The amplifier host 1 generates heat during use, and the heat dissipation mesh 25 assists in heat dissipation to prevent the amplifier host 1 from being in a high-temperature state for a long time, which would affect the service life of the internal components of the amplifier host 1 and thus reduce the service life of the amplifier host 1.

[0054] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 The present invention provides an embodiment of an automatic impedance-changing power amplifier, wherein the power amplifier host 1 has two sets of sliding grooves 14 on its front side, and both the input and output ends of the power amplifier host 1 are provided with BNC connectors 12. The top and bottom of the outer surface of the BNC connectors 12 are provided with fixing grooves, and the inner wall of the fixing groove is connected to a pressure sensor 13, which is used to detect whether a connection wire is connected.

[0055] The amplifier host 1 is internally connected to a fixing module, which includes two sets of small linear drivers 20 installed on the top wall of the amplifier host 1. The small linear drivers 20 are located on both sides of the sliding groove 14. The output end of the small linear drivers 20 is connected to a bidirectional lead screw 21. The top wall of the amplifier host 1 is connected to two sets of guide rods 22, which are located between the two sets of small linear drivers 20. The outer surfaces of the guide rods 22 and the bidirectional lead screw 21 are connected to two sets of arc-shaped clips 23, which are located above and below the BNC connector 12, respectively.

[0056] Furthermore, when connecting the cable, first align the connector on the cable with the BNC connector 12, insert it, and rotate it so that the protrusion on the connector engages in the fixing groove. At this time, the protrusion exerts pressure on the pressure sensor 13, indicating that the cable has been connected to the BNC connector 12. Immediately, the fixing module is triggered, the small linear actuator 20 runs, driving the bidirectional lead screw 21 to rotate, which in turn causes the two sets of arc-shaped clips 23 to move closer to the BNC connector 12 along the guide rod 22 until the BNC connector 12 and the cable are engaged between the two sets of arc-shaped clips 23. The fixing module is used to fix the cable and the BNC connector 12 a second time, to prevent the cable from falling off during use and to increase the stability and firmness of the connection.

[0057] Please see Figure 1 and Figure 5 The present invention provides an embodiment of an automatic impedance-changing power amplifier. The power amplifier host 1 is internally connected to a dustproof module, which is located in front of a fixed module. The dustproof module includes a small linear driver 16 installed on the inner wall of one side of the power amplifier host 1. The output end of the small linear driver 16 is connected to a bidirectional lead screw 17. A guide rod 18 is connected to the inner wall of one side of the power amplifier host 1, and the guide rod 18 is located below the small linear driver 16. A connector is connected to the outer surfaces of the guide rod 18 and the bidirectional lead screw 17. A dustproof cover 15 is connected to the bottom of the connector, and the dustproof cover 15 is located in front of the BNC connector 12 and inside the sliding groove 14.

[0058] Furthermore, when no connection cable is needed, the dust cover 15 is in a closed state. When a connection cable needs to be connected, the dust cover module is opened by controlling the button control area 19, which activates the small linear actuator 16, thereby driving the bidirectional lead screw 17 to rotate. This causes the connector to move along the guide rod 18, moving the dust cover 15 to expose the BNC connector 12 for subsequent connection. The dust cover module is used to prevent the BNC connector 12 from being exposed to the external environment for a long time, which would cause dust accumulation and affect the normal use of the BNC connector 12.

[0059] Furthermore, the power amplifier is used as follows:

[0060] S1. Before using the power amplifier, first connect the power cord to the power interface 5, then press the main switch 24 to start the entire power amplifier, and then press the button control area 19 to open the dustproof module.

[0061] S2. After the dust cover 15 is removed, the connecting wire can be installed at the BNC connector 12, so that the protrusion at the connector of the connecting wire is engaged in the fixing groove. At this time, the protrusion exerts pressure on the pressure sensor 13, which immediately triggers the corresponding fixing module to lock the connecting wire, so as to prevent the connecting wire from falling off during use.

[0062] S3. After the connecting cable is fixed, input the impedance value at button control area 19 according to the usage requirements. The power amplifier host 1 will then input the impedance value according to the impedance formula: Calculate the required resistance value R, then start the adjustment module to perform automatic adjustment;

[0063] S4. After using the power amplifier, first use the button control area 19 to unlock the fixed module, then rotate the connecting wire in the opposite direction of the connection and pull it out. Next, use the button control area 19 to control the small linear driver 16 to rotate in the opposite direction, which will drive the bidirectional lead screw 17 to rotate, thereby causing the dust cover 15 to move along the guide rod 18 until the dust cover 15 is completely closed to prevent the BNC connector 12 from being exposed to the air for a long time and accumulating dust. Then press the main switch 24 again to turn off the power amplifier. Finally, unplug the power cord from the power interface 5.

[0064] Step S1 further includes the following steps:

[0065] S11. The small linear actuator 16 operates, driving the bidirectional lead screw 17 to rotate, which in turn causes the connector to move along the guide rod 18, causing the dust cover 15 to move with the connector, exposing the BNC wiring port 12 for easy wiring.

[0066] Step S2 further includes the following steps:

[0067] S21, the fixed module starts, the small linear driver 3 20 runs, driving the bidirectional lead screw 3 21 to rotate, thereby causing the two sets of arc-shaped clips 23 to move closer to the BNC connector 12 along the guide rod 3 22, until the BNC connector 12 and the connecting wire are engaged between the two sets of arc-shaped clips 23.

[0068] Step S3 further includes the following steps:

[0069] S31. The adjustment module is started, the small linear actuator 2 runs, driving the bidirectional lead screw 3 to rotate, which in turn causes the slider to slide along the guide rod 4 and slide on the rheostat 6, changing the connected resistance value to meet the usage requirements.

[0070] Working principle: Before using the power amplifier, first connect the power cord to the power interface 5 to power the entire power amplifier. Then, operate the small linear actuator 16 through the button control area 19, which drives the bidirectional lead screw 17 to rotate. This causes the dust cover 15 of the connector to move along the guide rod 18, exposing the BNC connector 12. Then, align the connector of the connector with the BNC connector 12, insert it and rotate it so that the protrusion on the connector engages in the fixing groove. At this time, the protrusion exerts pressure on the pressure sensor 13, indicating that the connector has been connected to the BNC connector 12. Immediately trigger the fixing module to start, and the small linear actuator 20 runs, driving the bidirectional lead screw 21 to rotate. This causes the two sets of arc-shaped clips 23 to move closer to the BNC connector 12 along the guide rod 22 until the BNC connector 12 and the connector are engaged between the two sets of arc-shaped clips 23. The fixing module performs secondary fixing on the connector and the BNC connector 12 to prevent the connector from falling off during use.

[0071] After the connecting cable is fixed, input the impedance value at button control area 19 according to the usage requirements. The power amplifier host 1 will then input the impedance value according to the impedance formula: The required resistance value R is calculated, and then the adjustment module is started. The small linear driver 2 runs, driving the bidirectional lead screw 3 to rotate, which in turn causes the slider to slide along the guide rod 4 and onto the rheostat 6, changing the connected resistance value. Due to the relationship between resistance and impedance, the impedance of the power amplifier is changed by changing the resistance value to meet the usage requirements.

[0072] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An automatically impedance-changing power amplifier, comprising a power amplifier main unit (1), characterized in that: The power amplifier host (1) is internally connected to a rheostat (6), the top of the rheostat (6) is connected to a slider, and the power amplifier host (1) is internally connected to an adjustment module, which is located above the slider. The adjustment module includes a small linear driver (2) installed inside the power amplifier host (1). The output end of the small linear driver (2) is connected to a bidirectional lead screw (3). The power amplifier host (1) is connected to a guide rod (4), and the guide rod (4) is located above the bidirectional lead screw (3). The outer surfaces of the guide rod (4) and the bidirectional lead screw (3) are connected to a slider, and the sliders are connected to each other. The front of the power amplifier host (1) is provided with two sets of sliding grooves (14). The input and output ends of the power amplifier host (1) are provided with BNC connectors (12). The top and bottom of the outer surface of the BNC connector (12) are provided with fixing grooves. The inner wall of the fixing groove is connected to a pressure sensor (13), and the pressure sensor (13) is used to detect whether a connection line is connected. The amplifier host (1) is internally connected to a fixing module, which includes two sets of small linear drivers (20) installed on the top wall of the amplifier host (1). The small linear drivers (20) are located on both sides of the sliding groove (14). The output end of the small linear drivers (20) is connected to a bidirectional lead screw (21). The top wall of the amplifier host (1) is connected to two sets of guide rods (22), and the guide rods (22) are located between the two sets of small linear drivers (20). The outer surfaces of the guide rods (22) and the bidirectional lead screws (21) are connected to two sets of arc-shaped clips (23), and the two sets of arc-shaped clips (23) are located above and below the BNC connector (12), respectively.

2. The power amplifier with automatic impedance variation according to claim 1, characterized in that: The power amplifier host (1) is connected to a shielding cover plate (8) on the top and both sides. The outer surface of the shielding cover plate (8) is connected to an absorption layer (9). The bottom of the absorption layer (9) is connected to a metal isolation layer (10). The bottom of the metal isolation layer (10) is connected to a graphene coating (11), and the graphene coating (11) is used to prevent the shielding cover plate (8) from oxidizing.

3. The power amplifier with automatic impedance variation according to claim 1, characterized in that: The power amplifier host (1) is internally connected to a dustproof module, which is located in front of the fixed module. The dustproof module includes a small linear driver 2 (16) installed on the inner wall of one side of the power amplifier host (1). The output end of the small linear driver 2 (16) is connected to a bidirectional lead screw 2 (17). The inner wall of one side of the power amplifier host (1) is connected to a guide rod 2 (18), which is located below the small linear driver 2 (16). The outer surfaces of the guide rod 2 (18) and the bidirectional lead screw 2 (17) are connected to a connector. The bottom of the connector is connected to a dustproof cover (15), which is located in front of the BNC connector (12) and inside the sliding groove (14).

4. The power amplifier with automatic impedance variation according to claim 1, characterized in that: The front of the power amplifier host (1) is connected to two sets of handles (7), and the handles (7) are located on both sides of the sliding groove (14). The front of the power amplifier host (1) is connected to a button control area (19), and the button control area (19) is located between the two sets of sliding grooves (14). The front of the power amplifier host (1) is connected to a main switch (24), an adjustment knob (26) and a display screen (27), and the display screen (27) is located between the main switch (24) and the adjustment knob (26). The display screen (27) is located above the button control area (19).

5. The power amplifier with automatic impedance variation according to claim 2, characterized in that: The power amplifier host (1) is connected to a heat dissipation mesh (25) on both the back and top, and the heat dissipation mesh (25) on the top is located behind the shielding cover (8). The power amplifier host (1) is connected to a power interface (5) on the back, and the power interface (5) is located on one side of the heat dissipation mesh (25).

6. A method of using an automatically changing impedance power amplifier, applicable to the automatically changing impedance power amplifier as described in any one of claims 1-5, characterized in that, The power amplifier is used as follows: S1. Before using the power amplifier, first connect the power cord to the power interface (5), then press the main switch (24) to start the entire power amplifier, and then press the button control area (19) to open the dustproof module. S2. After the dust cover (15) is removed, the connecting wire can be installed at the BNC connector (12), so that the protrusion at the connector of the connecting wire is engaged in the fixing groove. At this time, the protrusion exerts pressure on the pressure sensor (13), which immediately triggers the corresponding fixing module to lock the connecting wire, so as to prevent the connecting wire from falling off during use. S3. After the connecting wires are fixed, input the impedance value at the button control area (19) according to the usage requirements. The power amplifier host (1) will then input the impedance value according to the impedance formula: The required resistance value R is calculated, and then the adjustment module is started to perform automatic adjustment. S4. After the power amplifier is finished, first use the button control area (19) to control the fixed module to unlock, then rotate the connecting wire in the opposite direction of the connection and pull it out. Then use the button control area (19) to control the small linear driver (16) to rotate in the opposite direction, which will drive the bidirectional lead screw (17) to rotate, thereby causing the dust cover (15) to move along the guide rod (18) until the dust cover (15) is completely closed to prevent the BNC wiring port (12) from being exposed to the air for a long time and accumulating dust. Then press the main switch (24) again to turn off the power amplifier. Finally, unplug the power cord from the power interface (5).

7. A method of using an automatically varying impedance power amplifier according to claim 6, characterized in that, Step S1 further includes the following steps: S11. The small linear actuator II (16) runs, driving the bidirectional lead screw II (17) to rotate, which in turn causes the connector to move along the guide rod II (18), causing the dust cover (15) to move with the connector, exposing the BNC wiring port (12) for easy wiring. Step S2 further includes the following steps: S21, the fixed module starts, the small linear driver three (20) runs, driving the bidirectional lead screw three (21) to rotate, thereby causing the two sets of arc-shaped clips (23) to move along the guide rod three (22) towards the BNC connector (12) until the BNC connector (12) and the connecting wire are engaged between the two sets of arc-shaped clips (23); Step S3 further includes the following steps: S31. The adjustment module is started, the small linear driver (2) runs, driving the bidirectional lead screw (3) to rotate, which in turn causes the slider to slide along the guide rod (4) and drive the slider to slide on the rheostat (6) to change the resistance value connected in order to meet the usage requirements.

Images