Energy converter based on electromagnetic induction

Abstract

A transducer based on electromagnetic induction is provided with a mounting seat, a magnet mounting column is fixedly connected to the middle of the upper end face of the mounting seat, and a magnet is connected to the other end of the magnet mounting column; the magnet mounting column is sleeved with a vibration response piece, and the two ends of the vibration response piece are connected with the mounting base and the magnet respectively; an induction coil is arranged at one end of the vibration response piece and is close to the magnet. According to the utility model, the whole structure is simple, the combination of the permanent magnet, the spring detection member and the induction coil is utilized, when vibration is detected, the mechanical energy of the movement of the spring detection member is converted into an electric signal through the induction coil, then the induction coil is powered on, and the electric energy can be converted into mechanical movement energy through the spring detection member. The requirements for vibration information collection and force feedback in special application scenes are met, and the device can be widely applied to application scenes with keys, simulation tentacles, sensors and the like.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, specifically to a transducer based on electromagnetic induction. Background Technology

[0002] In existing technologies, vibration detection sensors are mainly based on microelectromechanical systems (MEMS) accelerometers and optical vibration displacement sensors. However, these current sensors can only achieve unidirectional transmission from mechanical motion to electrical signals, and cannot achieve bidirectional transmission of both mechanical motion and electrical signals. To achieve the transmission of mechanical motion from electrical signals to existing sensors, other electromechanical devices such as motors and relays are required. Utility Model Content

[0003] I. Technical problems to be solved

[0004] This invention addresses the shortcomings of existing technologies by proposing an electromagnetic induction-based transducer that enables bidirectional transmission of mechanical motion and electrical signals, is small in size and light in weight, and is suitable for various vibration measurement and vibration feedback applications.

[0005] II. Specific Technical Solutions

[0006] An electromagnetic induction-based transducer is provided with a mounting base (1), a magnet mounting post (2) is fixedly connected to the middle of the upper surface of the mounting base (1), and a magnet (3) is connected to the other end of the magnet mounting post (2); a vibration response element (4) is sleeved on the magnet mounting post (2), and the two ends of the vibration response element (4) are respectively connected to the mounting base (1) and the magnet (3); an induction coil (5) is provided at one end of the vibration response element (4), and the induction coil (5) is close to the magnet (3).

[0007] Realization principle and working principle: During the detection of mechanical motion, the vibration response component (4) is vibrated, which drives the induction coil (5) to move along the axial direction of the magnet mounting column (2). Under the action of the magnetic field of the magnet (3), the moving induction coil (5) generates an induced current, thereby converting the mechanical vibration into an electrical signal.

[0008] In transmission mode, current is applied to the induction coil (5) through the control circuit. A magnetic field is generated in the induction coil (5) and interacts with the magnetic field of the magnet (3). This causes the magnet (3) to move relative to the induction coil (5) through the magnet mounting post (2). At the same time, energy is stored in the vibration response element (4). When the current is appropriate, the repulsive force of the magnetic field generated by the magnet (3) and the induction coil (5) and the elastic force of the vibration response element (4) will reach a balance. At this time, the induction coil (5) can remain relatively stationary at any appropriate position within its stroke. By changing the current in the induction coil (5), the magnet (3) and the mounting element (1) can produce the required motion characteristics. This is a reverse process of the sensor mode, which is something that existing sensor devices cannot do.

[0009] Preferably, the induction coil (5) is sleeved on the outer wall of the vibration response component (4) and fixedly connected to the outer wall of the vibration response component (4). The installation is simple and convenient for maintenance and replacement compared to the installation on the inner wall.

[0010] Preferably, the vibration response element (4) is a spring coil, which has linear motion and improves the accuracy of the detection data.

[0011] Preferably, the spring coil is made of metal, which has high elasticity, excellent linear motion, and low processing cost.

[0012] Preferably, the mounting base (1) has a circular sheet structure, and the magnet mounting post (2) is integrally formed and connected at the center of the upper surface of the mounting base (1). The magnet mounting post (2) and the mounting base (1) are made of non-magnetic materials. The integrally formed structure reduces the installation process and makes the installation more convenient.

[0013] Preferably, the magnet (3) is a cylindrical structure, and the magnet (3) is made of permanent magnet material, which has high magnetic stability and does not require energy consumption, thus facilitating the implementation of this utility model.

[0014] Preferably, the vibration response element (4) is provided with an elastic connecting strip, which is distributed along the outer wall of the magnet mounting column (2), and the two ends of the elastic connecting strip are respectively connected to the mounting base (1) and the inner end face of the magnet (3). If a rubber elastic connecting strip is used, it is easy to replace, and the force can be changed by adjusting the length of the rubber strip, thereby expanding the detection range of this utility model.

[0015] The beneficial effects of this utility model are as follows: the overall structure is simple. By combining a permanent magnet, a spring detection element, and an induction coil, when detecting vibration, the mechanical energy of the spring detection element's movement is converted into an electrical signal through the induction coil. When the induction coil is powered, the electrical energy can be converted into mechanical kinetic energy through the spring detection element. This realizes the need for vibration information acquisition and force feedback in special application scenarios and can be widely used in application scenarios such as those with buttons, simulated touches, and sensors. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 3 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0019] Figure 4 This is a schematic diagram of the control circuit in this utility model. Detailed Implementation

[0020] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0021] Example 1:

[0022] like Figure 1 and Figure 2 As shown: A transducer based on electromagnetic induction is provided with a plate-shaped circular mounting base 1. A magnet mounting post 2 is fixedly connected to the middle of the upper end surface of the mounting base 1. The mounting base 1 and the magnet mounting post 2 are integrally molded from plastic injection molding. A cylindrical permanent magnet 3 is connected to the other end of the magnet mounting post 2. A vibration response element 4 is sleeved on the magnet mounting post 2. The vibration response element 4 is a metal spring coil structure. The two ends of the vibration response element 4 abut against the mounting base 1 and the magnet 3 respectively, or are fixedly connected. An induction coil 5 is provided on the outer surface of one end of the vibration response element 4, and the induction coil 5 is close to the magnet 3.

[0023] During the detection of mechanical motion, the metal spring coil is vibrated, which drives the induction coil 5 to move along the axial direction of the magnet mounting post 2. Under the action of the magnetic field of the magnet 3, the moving induction coil 5 generates an induced current, thereby converting the mechanical vibration into an electrical signal.

[0024] In transmission mode, an external circuit applies current to the induction coil 5, generating a magnetic field that interacts with the magnetic field of the magnet 3. This causes the magnet 3 to move relative to the mounting base 1 via the magnet mounting post 2. Simultaneously, energy is stored in the metal spring coil. When the current reaches a set value, the repulsive force between the magnetic fields generated by the magnet 3 and the induction coil 5, and the elastic force of the metal spring coil, reach a balance. At this point, the induction coil 5 can remain relatively stationary at any suitable position within its travel range. By changing the current in the induction coil 5, the magnet 3 and the mounting base 1 can produce the desired motion characteristics. This is the reverse process of the sensor mode, which is something traditional sensor devices cannot achieve.

[0025] like Figure 4 The diagram shows a control circuit for an electromagnetic induction transducer, comprising a drive circuit. One end of the drive circuit's power input is connected to power supply VDD, and the other end is grounded. The output of the drive circuit is connected to the input of the induction coil 5. The drive circuit includes a MOSFET Q1. The gate of MOSFET Q1 is connected to the control signal PWM1, its drain is connected to power supply VDD, and one source is connected to the drain of MOSFET Q2. The other source is connected to the first input of the induction coil 5 via inductor L2. A [missing information - likely a circuit name] is also connected between the source of MOSFET Q1 and inductor L2. A capacitor C1 is provided, with its other end grounded. The gate of the MOSFET Q2 is connected to the control signal PWM2, and its source is grounded. A MOSFET Q3 is also provided, with its drain connected to the power supply VDD, its gate connected to the control signal PWM3, and its source connected to the source of MOSFET Q4 in one path and to the second input terminal of the induction coil 5 through inductor L3. A capacitor C2 is also connected between the source of MOSFET Q3 and inductor L3, with its other end grounded. The gate of the MOSFET Q4 is connected to the control signal PWM4, and its source is grounded.

[0026] During forward current operation: The driving circuit works by inputting a PWM control signal with a duty cycle of 0-100% to MOSFET Q1, causing Q1 to operate in a chopping state; inputting a low-level control signal to MOSFET Q2, causing Q2 to operate in a turn-off state; inputting a low-level control signal to MOSFET Q3, causing Q3 to operate in a turn-off state; and inputting a high-level control signal to MOSFET Q4, causing Q4 to operate in a continuously conducting state. At this time, the current in the driving circuit flows from the power supply VDD, through the chopping of MOSFET Q1, through the filtering of capacitor C1 and inductor L2, through the induction coil 5, through the filtering circuit of capacitor C2 and inductor L3, and finally through MOSFET Q4 to GND.

[0027] The current passing through the induction coil 5 is determined by the internal resistance of the power supply, the series equivalent resistance of inductors L2, L1, and L3, and the duty cycle of the switch.

[0028]

[0029] Where R s It is the internal resistance of the power supply, ESR L1 It is induction coil 5, ESR L2 It is the series equivalent resistance of inductor L2, ESR L3 D is the series equivalent resistance of inductor L3, and D is the positive duty cycle of the PWM control signal connected to MOSFET Q1.

[0030] During reverse current operation: A PWM control signal with a duty cycle of 0-100% is input to MOSFET Q3, causing it to operate in a chopping state; a low-level control signal is input to MOSFET Q4, causing it to operate in a turn-off state; a low-level control signal is input to MOSFET Q1, causing it to operate in a turn-off state; a high-level control signal is input to MOSFET Q2, causing it to operate in a continuously conducting state. At this time, the current in the drive circuit flows from the power supply VDD, through the chopping of MOSFET Q3, through the filtering of capacitor C2 and inductor L3, through the induction coil 5, through the filtering circuit of capacitor C1 and inductor L2, and finally through MOSFET Q2 to GND.

[0031] The current passing through the induction coil 5 is determined by the internal resistance of the power supply, the series equivalent resistance of inductors L2, L1, and L3, and the duty cycle of the switch.

[0032]

[0033] Where R s It is the internal resistance of the power supply, ESR L1 It is the series equivalent resistance of induction coil 5, ESR L2 It is the series equivalent resistance of inductor L2, ESR L3 D is the series equivalent resistance of inductor L3, and D is the positive duty cycle of the PWM control signal connected to MOSFET Q3.

[0034] A detection circuit is provided, which includes an amplifier U1. One positive terminal of the amplifier U1 is connected to the first input terminal of the induction coil 5 via a resistor R1, and the other is connected to the reference power supply VREF via a resistor R3. One negative terminal of the amplifier U1 is connected to the second input terminal of the induction coil 5 via a resistor R2, and the other is connected to the output terminal of the amplifier U1 via a resistor R4. The output terminal of the amplifier U1 is the detection signal output terminal.

[0035] The detection circuit consists of a biased proportional amplifier U1. It is composed of resistors R1, R2, R3, and R4 connected to U1. For ease of calculation, R1 and R2 have the same value, and R3 and R4 have the same value. The amplification factor of the detection circuit is equal to...

[0036] Output voltage

[0037] Where V L1 It is the voltage difference across induction coil 5, V out It is the output voltage of the ADC port.

[0038] Example 2:

[0039] As an optimization, with other structures identical to Embodiment 1:

[0040] like Figure 3 As shown: The vibration response component 4 is equipped with rubber elastic connecting strips, which are distributed along the outer wall of the magnet mounting column 2. The two ends of the elastic connecting strips are respectively connected to the mounting base 1 and the inner end face of the magnet 3. The induction coil 5 is sleeved on the outer wall of the cylinder formed by the rubber elastic connecting strips. Using elastic connecting strips instead of the metal spring coil in Embodiment 1 enables the movement of the induction coil 5. The replacement of the elastic connecting strips is more convenient, and the overall elasticity can be quickly adjusted by adjusting the length of the elastic connecting strips to adapt to different application scenarios.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims.

Claims

1. A transducer based on electromagnetic induction, characterized in that: A mounting base (1) is provided, and a magnet mounting post (2) is fixedly connected to the middle of the upper end face of the mounting base (1). A magnet (3) is connected to the other end of the magnet mounting post (2). A vibration response element (4) is sleeved on the magnet mounting post (2), and the two ends of the vibration response element (4) are respectively connected to the mounting base (1) and the magnet (3); An induction coil (5) is provided at one end of the vibration response element (4), and the induction coil (5) is close to the magnet (3).

2. The transducer based on electromagnetic induction according to claim 1, characterized in that: The induction coil (5) is sleeved on the outer wall of the vibration response component (4).

3. The transducer based on electromagnetic induction according to claim 1, characterized in that: The vibration response element (4) is a spring coil.

4. The transducer based on electromagnetic induction according to claim 3, characterized in that: The spring coil is made of metal.

5. The transducer based on electromagnetic induction according to claim 1, characterized in that: The mounting base (1) is a circular sheet structure. The magnet mounting post (2) is integrally formed and connected to the center of the upper surface of the mounting base (1). The magnet mounting post (2) and the mounting base (1) are made of non-magnetic materials.

6. The transducer based on electromagnetic induction according to claim 1, characterized in that: The magnet (3) has a cylindrical structure and is made of permanent magnet material.

7. The transducer based on electromagnetic induction according to claim 1, characterized in that: The vibration response component (4) is provided with an elastic connecting strip, which is distributed along the outer wall of the magnet mounting column (2), and the two ends of the elastic connecting strip are respectively connected to the mounting base (1) and the inner end face of the magnet (3).

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