Low-frequency mechanical energy antenna with rapid data modulation function

Abstract

The invention relates to a low-frequency mechanical energy antenna with a rapid data modulation function, which is characterized in that a motor (1) is arranged on a chassis (61) of an integral support (6), a rotating shaft of the motor is connected with a rotating body (2), the rotating body comprises a rotating body lower part (21), a rotating body middle part (22) and a rotating body upper part (23), the rotating body lower part is hollow and is provided with a rotatable permanent magnet (3), and the rotating body middle part (22) is connected with the rotating body upper part (23); the rotatable permanent magnet is connected with a rotating shaft of a servo steering engine (4) and is controlled by the servo steering engine to rotate; the upper portion of the rotating body is hollow, the servo steering engine is fixed to the middle of the rotating body and connected with an external control circuit (7), and the control circuit sends PWM signals to control the position of the servo steering engine to complete the phase modulation function. The phase modulation effect of the very low frequency mechanical energy antenna is completed with low power consumption, high data rate or high modulation bandwidth.

Description

Technical Field

[0001] Mechanical energy antennas use mechanical motion to generate electromagnetic waves, which can effectively reduce antenna size and improve antenna efficiency at the same operating frequency as traditional antennas. Background Art

[0002] In electromagnetism, a changing magnetic field can generate a changing electric field, which in turn generates an alternating magnetic field. In other words, a changing magnetic field or electric field can also generate electromagnetic waves. An antenna is a transducer that radiates electromagnetic energy into space. Traditional antennas use a changing electric field (such as an alternating current) to excite the electromagnetic field. This method is highly efficient at higher frequencies, but at low frequencies, such as below 10 kHz, the antenna's large size relative to the wavelength of electromagnetic space makes it difficult to carry. Furthermore, the antenna's efficiency is very low, often less than 1%, wasting a significant amount of energy. According to Maxwell's equations, a changing magnetic field can also generate electromagnetic waves. Therefore, using a changing magnetic field to generate electromagnetic waves is a viable option. Due to the low frequency, methods such as using a motor to rotate a permanent magnet can also generate a periodically alternating electromagnetic field. Permanent magnets, due to their small size, have a static magnetic field strength far greater than that of a current-induced field at room temperature. Therefore, their efficiency in converting electrical energy into radiated electromagnetic wave energy is much higher than that achieved by current-induced magnetic field.

[0003] Existing technological advances in mechanical energy antennas primarily utilize rotating permanent magnets to convert mechanical energy into electromagnetic waves, effectively emitting electromagnetic waves. However, the primary purpose of generating electromagnetic waves is communication, where information is carried by varying the amplitude or phase of a sinusoidal signal. Rotating permanent magnets can achieve continuous or digital frequency modulation by varying their rotational speed, or binary amplitude modulation by switching them on and off. However, both methods are inherently limited in speed, hindering the ability to increase the information rate of the modulation. This, in turn, limits the bandwidth and speed of communication. Summary of the Invention

[0004] Technical Problem: To effectively utilize the high efficiency and small size of mechanical energy antennas, this invention proposes a low-frequency mechanical energy antenna with fast data modulation capabilities. This antenna utilizes a mechanical servo structure for modulation, integrated into a rotating permanent magnet structure, and can achieve both continuous phase modulation and binary digital modulation. Compared to frequency modulation for speed change and amplitude modulation for start and stop control, this device offers high modulation speed, convenient control, and limited additional size. Through appropriate command control, this device can implement various phase modulation methods, such as analog phase modulation (PM) and digital phase modulation (PSK).

[0005] Technical solution: The present invention provides a low-frequency mechanical energy antenna with a fast data modulation function. An electric motor is provided on the chassis of an integral bracket. A rotating body is connected to the rotating shaft of the electric motor. The rotating body includes three parts: the lower part of the rotating body, the middle part of the rotating body, and the upper part of the rotating body. The lower part of the rotating body is hollow and is provided with a rotatable permanent magnet. The rotatable permanent magnet is connected to the rotating shaft of the servo servo and is controlled to rotate by the servo servo; the upper part of the rotating body is hollow, and the servo servo is fixed on the middle part of the rotating body and connected to an external control circuit. The control circuit sends a PWM signal to control the position of the servo servo to complete the phase modulation function.

[0006] The motor is a speed-controlled motor controlled by an electronic speed regulator. The electronic speed regulator controls the motor's speed to generate a very low frequency electromagnetic wave carrier. Phase modulation of the carrier signal is achieved by controlling the relative angular position between the rotating body and the rotatable permanent magnet.

[0007] The lower part of the rotating body is cylindrical with an open upper end, and the rotatable permanent magnet is located therein. A circle of connecting rings is provided on the outer periphery of the upper end of the lower part of the rotating body, and a circle of screw holes is provided on the connecting rings.

[0008] The middle part of the rotating body is annular, and screw holes corresponding to the screw holes of the connecting ring on the upper part of the lower part of the rotating body are arranged on the annular ring, and the servo steering engine is fixed in the middle of the middle part of the rotating body.

[0009] The upper part of the rotating body in the rotating body is cylindrical with an open lower end. A connecting ring is provided on the outer periphery of the lower end of the upper part of the rotating body. A circle of screw holes corresponding to the screw holes of the connecting ring on the upper part of the lower part of the rotating body are provided on the connecting ring. The lower part of the rotating body, the middle part of the rotating body, and the upper part of the rotating body are combined together according to the corresponding screw holes to form a complete rotating body.

[0010] The rotatable permanent magnet comprises: a first permanent magnet box body, a permanent magnet box cover and a permanent magnet block located in the permanent magnet box body; the upper end of the second permanent magnet box cover is connected to the rotating shaft of the servo steering engine, and the lower end of the permanent magnet box cover is connected to the permanent magnet box body.

[0011] The servo steering engine is fixed in the middle of the rotating body, the rotating shaft of the servo steering engine is connected to the rotatable permanent magnet, and the power control line of the servo steering engine is led out to the control circuit outside the integral bracket through the upper part of the rotating body and the conductive slip ring.

[0012] The conductive slip ring is a mercury slip ring having three slidably connected electrical signal connection terminals, corresponding to a power supply, a ground wire, and a servo control wire, respectively. The sliding portion of the conductive slip ring is fixedly connected to the upper portion of the rotating body, and the fixed portion of the slip ring is fixedly connected to the integral bracket. External wires are connected via the fixed portion connection terminals of the conductive slip ring, enter the rotating portion terminals of the conductive slip ring through the conductive connection of the mercury slip ring, and are further connected to the servo servo via wires. The above connection ensures that the servo servo inside the rotating body is powered by an external control circuit and controls the movement of the servo servo during high-speed rotation of the rotating body, and the connection is continuous 360-degree sliding, avoiding the problem of entanglement after multiple rotations when directly connecting with wires.

[0013] The two magnetic poles of the permanent magnet block in the rotatable permanent magnet are distributed on both sides of the diameter of the rotatable permanent magnet.

[0014] The control circuit converts the source signal of the analog signal or digital signal into control information proportional to the relative position between the rotating body and the permanent magnet, thereby completing the analog or digital phase modulation function of the external source signal on the mechanical energy antenna.

[0015] Beneficial effects: The low-frequency mechanical energy antenna with fast data modulation function of the present invention has the following advantages compared with traditional mechanical energy antennas:

[0016] The speed of the modulation signal is greatly improved. The antenna of the traditional mechanical rotation working mode needs to control the rotation speed to achieve frequency modulation, and then realize data transmission. Since a permanent magnet with high-speed rotation has a large moment of inertia, the change of the rotation frequency cannot be realized quickly, and there will be a slow change process, which in turn causes a decrease in the modulation speed. If an electromagnet is used to change the polarity of the permanent magnet, although the speed can be greatly improved, since the equivalent current of the permanent magnet is on the order of thousands of amperes, it is obviously unrealistic or uneconomical to achieve such current control. The present invention changes the original rotating permanent magnet body into two stacked cylinders, and only changes the relative position of the inner and outer cylinders during modulation, thereby avoiding the control of the start and stop of the high-speed rotating object and changing the angular velocity of the object with large rotational inertia, thereby improving the modulation speed.

[0017] Modulation is relatively flexible. By varying the duty cycle of the input PWM signal, both continuous analog and digital modulation can be achieved. This means that common phase modulation methods such as analog phase modulation (PM), binary phase-shift keying (BPSK), and quadrature phase-shift keying (QPSK) can be implemented within a single modulation device. The speed at which digital modulation changes from one phase modulation state to another depends solely on the response speed of the servo. This effectively increases the data rate of digital modulation sources, a crucial factor in very low frequency communications.

[0018] Further reducing the power consumption of mechanical antennas. Conventional FM rotating permanent magnet antennas constantly accelerate and decelerate during operation. Because they already rotate at high speed, these accelerations and decelerations increase energy consumption due to factors such as wind resistance and mechanical friction. The modulation in this invention simply changes the relative position between two high-speed moving objects, using far less energy than accelerating or decelerating a high-speed rotating object. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structural principle of the present invention;

[0020] Figure 2 This is a schematic diagram of the relationship between the modulated phase and the position of the permanent magnet in the state of mechanical rotation emitting low-frequency electromagnetic waves of the present invention; wherein, Figure 2 a in the equation is the relative position of the magnet to the rotating body when the electromagnetic wave is modulated at 0 degrees phase. Figure 2 b is the position of the magnet relative to the rotating body in the modulation state with a phase lag of 45 degrees. Figure 2 c is the position of the magnet relative to the rotating body in the phase lag 90 degrees modulation state, Figure 2 The d in the equation is the position of the magnet relative to the rotating body in the modulation state with a phase lag of 180 degrees.

[0021] Figure 3 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 4 It is a schematic diagram of the overall appearance structure of the present invention.

[0023] The figure shows: motor 1, rotating body 2, rotating body lower part 2_1, rotating body middle part 2_2, rotating body upper part 2_3, rotatable permanent magnet 3, first permanent magnet box 3_1, second permanent magnet box cover 3_2, servo steering gear 4, conductive slip ring 5, integral bracket 6, chassis 6_1, control circuit 7, analog signal 8, digital signal 9. DETAILED DESCRIPTION

[0024] The present invention is described with specific examples for each feature described in the invention.

[0025] A low-frequency mechanical energy antenna with fast data modulation function includes the following aspects:

[0026] The double-layered rotating cylinder body is as follows Figure 1 Unlike conventional mechanical antennas, which integrate magnets into a rotating cylinder, this invention employs two stacked cylinders to enhance modulation capabilities. The outer cylinder serves as the main rotating body 2, while the inner cylinder houses the adjustable rotating permanent magnet 3. Changing the relative position of the two cylinders can alter the phase of the electromagnetic wave.

[0027] The servo motor 4 controls the angle of motion between the two opposing cylinders to achieve phase modulation. During the high-speed rotation of the mechanical energy antenna, the servo motor 4 is mounted on the outer cylindrical rotating body 2, and its angular velocity is consistent with that of the outer cylinder 2, corresponding to the carrier operating frequency of the electromagnetic wave. The inner cylindrical permanent magnet 3 connected to the servo motor is controlled by the servo motor 4 to produce relative motion with the rotating body 2. Because the strong magnet is integrated into the inner cylindrical rotatable permanent magnet 3, phase modulation can be generated when the rotatable permanent magnet 3 and the outer rotating body 2 produce relative motion during the high-speed rotation of the rotating body.

[0028] The power supply and signal control lines for the servo actuator 4 are connected from the high-speed rotating antenna body to the control circuit 7 of the external device through the servo actuator's high-speed slip ring (such as, but not limited to, a mercury slip ring). The control circuit 7 provides power to the servo actuator 4 and also controls the angle of the servo actuator 4, completing the phase modulation function.

[0029] External control devices include the main rotating motor's electronic speed regulator, which sets the carrier's operating frequency, and an auxiliary pulse-width modulation (PWM) control circuit 7, which controls the servo's mechanical angle. Auxiliary control circuit 7 also includes a modulation signal input. If the signal is an analog signal 8, an analog-to-digital converter converts it into a digital signal, which is then modulated onto a PWM signal to achieve analog phase-modulated signal transmission. If the signal is a binary digital signal 9, the external digital signal input is directly mapped to two or more different PWM signal duty cycles to achieve digital phase-modulated communication.

[0030] like Figure 1 、 2As shown in Figures 3 and 4, a motor 1 is mounted on the chassis 6_1 of the integral support 6. A rotating body 2 is connected to the rotating shaft of the motor 1. The rotating body 2 comprises three parts: a lower portion 2_1, a middle portion 2_2, and an upper portion 2_3. The lower portion 2_1 is hollow and contains a rotatable permanent magnet 3, which is connected to the rotating shaft of a servo actuator 4 and controlled by the servo actuator 4. The upper portion 2_3 is hollow, and the servo actuator 4 is fixed to the middle portion 2_2 and connected to an external control circuit 7. The control circuit 7 sends a PWM signal to control the position of the servo actuator 4, thereby performing phase modulation. The motor 1 is a speed-controlled motor, controlled by an electronic speed regulator. The electronic speed regulator controls the speed of the motor 1 to generate a very low frequency electromagnetic wave carrier wave of a certain frequency. The phase modulation of the carrier signal is achieved by controlling the relative angular position between the rotating body 2 and the rotatable permanent magnet 3. The lower portion 2_1 of the rotating body 2 is cylindrical with an open top, housing a rotatable permanent magnet 3. A connecting ring is provided around the outer periphery of the upper end of the lower portion 2_1, with a circle of screw holes defined in the connecting ring. The middle portion 2_2 of the rotating body 2 is annular, with screw holes defined on the ring corresponding to the screw holes in the connecting ring on the upper portion of the lower portion 2_1. A servo motor 4 is secured in the center of the middle portion 2_2. The upper portion 2_3 of the rotating body 2 is cylindrical with an open bottom. A connecting ring is provided around the outer periphery of the lower end of the upper portion 2_3, with a circle of screw holes defined on the connecting ring corresponding to the screw holes in the connecting ring on the upper portion of the lower portion 2_1. The lower portion 2_1, the middle portion 2_2, and the upper portion 2_3 are assembled together using screws along the corresponding screw holes to form the complete rotating body 2. The rotatable permanent magnet 3 comprises a first permanent magnet housing 3_1, a permanent magnet housing cover 3_2, and a permanent magnet block located within the housing 3_1. The upper end of the second permanent magnet housing cover 3_2 is connected to the rotating shaft of the servo servo motor 4, while the lower end of the permanent magnet housing cover 3_2 is connected to the permanent magnet housing 3_1. The servo servo motor 4 is fixed in the center of the rotating body middle portion 2_2. The rotating shaft of the servo servo motor 4 is connected to the rotatable permanent magnet 3. The power control line of the servo servo motor 4 is led through the rotating body upper portion 2_3 and the conductive slip ring 5 to the control circuit 7 outside the integral bracket 6.The conductive slip ring 5 is a mercury slip ring having three slidably connected electrical signal connection terminals, corresponding to a power supply, a ground line, and a servo control line, respectively. The sliding portion of the conductive slip ring 5 is fixedly connected to the upper portion 2_3 of the rotating body, and the fixed portion of the conductive slip ring 5 is fixedly connected to the integral bracket 6. External wires are connected via the fixed portion connection terminals of the slip ring 5, enter the rotating portion terminals of the conductive slip ring 5 through the conductive connection of the mercury slip ring, and are further connected to the servo servo 4 via wires. The above connection ensures that the external control circuit 7 supplies power to the servo servo 4 inside the rotating body 2 and controls the movement of the servo servo during high-speed rotation of the rotating body 2. The connection is a 360-degree continuous sliding connection, avoiding the problem of entanglement after multiple rotations when directly connecting with wires. The two magnetic poles of the permanent magnet block in the rotatable permanent magnet 3 are distributed on both sides of the diameter of the rotatable permanent magnet 3. The control circuit 7 converts the source signal of the analog signal 8 or the digital signal 9 into control information proportional to the relative position between the rotating body 2 and the permanent magnet 3, thereby completing the analog or digital phase modulation function of the external source signal on the mechanical energy antenna.

[0031] Conductive slip rings are installed in the circular holes on the top surface of the rotating body 2_3 and the integral bracket 6. Since the servo is controlled by three wires, a conductive slip ring that combines three wires into one is required. Finally, the three wires (two power wires and one PWM control wire) are connected through an appropriate control circuit to achieve PWM control, thereby completing the modulation of the mechanical energy antenna.

[0032] Figure 4 This is a schematic diagram of the completed installation. Figure 2 It is a schematic diagram describing the relative position of the signal phase and the permanent magnet when transmitting the electromagnetic wave carrier. Looking from top to bottom, assuming that Figure 2 The rotating body shown in the middle rotating body 2 is at a standard 0 degree scale. Figure 2 The permanent magnet shown in the rotatable permanent magnet 3 corresponds to different position directions ( Figure 2 In the four states a, b, c, and d) different phases of the carrier output can be generated, such as Figure 2 The expressions above a, b, c, and d in the figure show this. As can be seen from the expressions, as long as the position of the permanent magnet and the rotating body is linear, the phase modulation of the output carrier also satisfies linear phase modulation. Therefore, this solution can achieve both digital and analog phase modulation.

[0033] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed in the present invention should be included in the protection scope recorded in the claims.

Claims

1. A low-frequency mechanical energy antenna with fast data modulation function, characterized by: An electric motor (1) is provided on a chassis (6_1) of an integral bracket (6). A rotating body (2) is connected to the rotating shaft of the electric motor (1). The rotating body (2) comprises three parts: a rotating body lower part (2_1), a rotating body middle part (2_2), and a rotating body upper part (2_3). The rotating body lower part (2_1) is hollow and is provided with a rotatable permanent magnet (3). The rotatable permanent magnet (3) is connected to the rotating shaft of a servo steering engine (4) and is controlled to rotate by the servo steering engine (4). The rotating body upper part (2_3) is hollow. The servo steering engine (4) is fixed to the rotating body middle part (2_2) and is connected to an external control circuit (7). The control circuit (7) sends a PWM signal to control the position of the servo steering engine (4) to complete a phase modulation function.

2. The low-frequency mechanical energy antenna with fast data modulation function according to claim 1, characterized in that: The motor (1) is a speed-controllable motor, and the speed of the motor (1) is controlled by an electronic speed regulator. The speed of the motor (1) is controlled by the electronic speed regulator to generate a very low frequency electromagnetic wave carrier of a certain frequency. The relative angular position between the rotating body (2) and the rotatable permanent magnet (3) is controlled to achieve phase modulation of the carrier signal.

3. The low-frequency mechanical energy antenna with fast data modulation function according to claim 1, characterized in that: The lower part (2_1) of the rotating body (2) is cylindrical with an open top, and a rotatable permanent magnet (3) is located therein. A circle of connecting rings is arranged on the outer periphery of the upper end of the lower part (2_1) of the rotating body, and a circle of screw holes is arranged on the connecting rings.

4. The low-frequency mechanical energy antenna with fast data modulation function according to claim 1, characterized in that: The middle part (2_2) of the rotating body (2) is annular, and screw holes corresponding to the screw holes of the connecting ring on the upper part of the rotating body lower part (2_1) are provided on the annular ring. The servo steering engine (4) is fixed in the middle of the middle part (2_2) of the rotating body.

5. The low-frequency mechanical energy antenna with fast data modulation function according to claim 1, characterized in that: The upper part (2_3) of the rotating body (2) is cylindrical with an open lower end. A connecting ring is provided on the outer periphery of the lower end of the upper part (2_3). The connecting ring is provided with a circle of screw holes corresponding to the screw holes of the connecting ring on the upper part of the lower part (2_1) of the rotating body. The lower part (2_1), the middle part (2_2) and the upper part (2_3) of the rotating body are assembled together by screws according to the corresponding screw holes to form a complete rotating body (2).

6. The low-frequency mechanical energy antenna with fast data modulation function according to claim 3, characterized in that: The rotatable permanent magnet (3) comprises a first permanent magnet box body (3_1), a permanent magnet box cover (3_2), and a permanent magnet block located in the permanent magnet box body (3_1); the upper end of the second permanent magnet box cover (3_2) is connected to the rotating shaft of the servo steering engine (4), and the lower end of the permanent magnet box cover (3_2) is connected to the permanent magnet box body (3_1).

7. The low-frequency mechanical energy antenna with fast data modulation function according to claim 6, characterized in that: The servo steering engine (4) is fixed in the middle of the middle part (2_2) of the rotating body, the rotating shaft of the servo steering engine (4) is connected to the rotatable permanent magnet (3), and the power control line of the servo steering engine (4) is led out to the control circuit (7) outside the integral bracket (6) through the upper part (2_3) of the rotating body and the conductive slip ring (5).

8. The low-frequency mechanical energy antenna with fast data modulation function according to claim 7, characterized in that: The conductive slip ring (5) is a mercury slip ring having three slidably connected electrical signal connection terminals corresponding to a power supply, a ground wire, and a steering gear control wire respectively; the sliding body portion of the conductive slip ring (5) is fixedly connected to the upper portion (2-3) of the rotating body, and the fixed portion of the conductive slip ring (5) is fixedly connected to the integral bracket (6); an external wire is connected via the fixed portion connection terminal of the conductive slip ring (5), enters the rotating portion terminal of the conductive slip ring (5) through the conductive connection of the mercury slip ring, and is further connected to the servo steering gear (4) via a wire; the above connection ensures that the external control circuit (7) supplies power to the servo steering gear (4) inside the rotating body (2) and controls the movement of the steering gear during high-speed rotation of the rotating body (2), and the connection is a 360-degree continuous sliding connection, thereby avoiding the problem of entanglement after multiple rotations when directly using a wire connection.

9. The low-frequency mechanical energy antenna with fast data modulation function according to claim 7, characterized in that: The two magnetic poles of the permanent magnet block in the rotatable permanent magnet (3) are distributed on both sides of the diameter of the rotatable permanent magnet (3).

10. The low-frequency mechanical energy antenna with fast data modulation function according to claim 1, characterized in that: The control circuit (7) converts the signal source of the analog signal (8) or the digital signal (9) into control information proportional to the relative position between the rotating body (2) and the permanent magnet (3), thereby completing the analog or digital phase modulation function of the external signal source on the mechanical energy antenna.

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